{
  "version": 3,
  "sources": ["../source/node/TreeIterator.ts", "../source/Constants.ts", "../source/node/Category.ts", "../source/node/Node.ts", "../source/node/Whitespace.ts", "../source/range/Boundaries.ts", "../source/node/MergeSplit.ts", "../source/Clean.ts", "../source/node/Block.ts", "../source/range/Block.ts", "../source/range/InsertDelete.ts", "../source/range/Contents.ts", "../source/Clipboard.ts", "../source/keyboard/Enter.ts", "../source/keyboard/KeyHelpers.ts", "../source/keyboard/Backspace.ts", "../source/keyboard/Delete.ts", "../source/keyboard/Tab.ts", "../source/keyboard/Space.ts", "../source/keyboard/KeyHandlers.ts", "../source/ImageResize.ts", "../source/Editor.ts", "../source/Squire.ts"],
  "sourcesContent": ["type NODE_TYPE = 1 | 4 | 5;\nconst SHOW_ELEMENT = 1; // NodeFilter.SHOW_ELEMENT;\nconst SHOW_TEXT = 4; // NodeFilter.SHOW_TEXT;\nconst SHOW_ELEMENT_OR_TEXT = 5; // SHOW_ELEMENT|SHOW_TEXT;\n\nconst always = (): true => true;\n\nclass TreeIterator<T extends Node> {\n    root: Node;\n    currentNode: Node;\n    nodeType: NODE_TYPE;\n    filter: (n: T) => boolean;\n\n    constructor(root: Node, nodeType: NODE_TYPE, filter?: (n: T) => boolean) {\n        this.root = root;\n        this.currentNode = root;\n        this.nodeType = nodeType;\n        this.filter = filter || always;\n    }\n\n    isAcceptableNode(node: Node): boolean {\n        const nodeType = node.nodeType;\n        const nodeFilterType =\n            nodeType === Node.ELEMENT_NODE\n                ? SHOW_ELEMENT\n                : nodeType === Node.TEXT_NODE\n                  ? SHOW_TEXT\n                  : 0;\n        return !!(nodeFilterType & this.nodeType) && this.filter(node as T);\n    }\n\n    nextNode(): T | null {\n        const root = this.root;\n        let current: Node | null = this.currentNode;\n        let node: Node | null;\n        while (true) {\n            node = current.firstChild;\n            while (!node && current) {\n                if (current === root) {\n                    break;\n                }\n                node = current.nextSibling;\n                if (!node) {\n                    current = current.parentNode;\n                }\n            }\n            if (!node) {\n                return null;\n            }\n\n            if (this.isAcceptableNode(node)) {\n                this.currentNode = node;\n                return node as T;\n            }\n            current = node;\n        }\n    }\n\n    previousNode(): T | null {\n        const root = this.root;\n        let current: Node | null = this.currentNode;\n        let node: Node | null;\n        while (true) {\n            if (current === root) {\n                return null;\n            }\n            node = current.previousSibling;\n            if (node) {\n                while ((current = node.lastChild)) {\n                    node = current;\n                }\n            } else {\n                node = current.parentNode;\n            }\n            if (!node) {\n                return null;\n            }\n            if (this.isAcceptableNode(node)) {\n                this.currentNode = node;\n                return node as T;\n            }\n            current = node;\n        }\n    }\n\n    // Previous node in post-order.\n    previousPONode(): T | null {\n        const root = this.root;\n        let current: Node | null = this.currentNode;\n        let node: Node | null;\n        while (true) {\n            node = current.lastChild;\n            while (!node && current) {\n                if (current === root) {\n                    break;\n                }\n                node = current.previousSibling;\n                if (!node) {\n                    current = current.parentNode;\n                }\n            }\n            if (!node) {\n                return null;\n            }\n            if (this.isAcceptableNode(node)) {\n                this.currentNode = node;\n                return node as T;\n            }\n            current = node;\n        }\n    }\n}\n\n// ---\n\nexport { TreeIterator, SHOW_ELEMENT, SHOW_TEXT, SHOW_ELEMENT_OR_TEXT };\n", "const DOCUMENT_POSITION_PRECEDING = 2; // Node.DOCUMENT_POSITION_PRECEDING\nconst ELEMENT_NODE = 1; // Node.ELEMENT_NODE;\nconst TEXT_NODE = 3; // Node.TEXT_NODE;\nconst DOCUMENT_NODE = 9; // Node.DOCUMENT_NODE;\nconst DOCUMENT_FRAGMENT_NODE = 11; // Node.DOCUMENT_FRAGMENT_NODE;\n\nconst ZWS = '\\u200B';\n\nconst ua = navigator.userAgent;\n\nconst isMac = /Mac OS X/.test(ua);\nconst isWin = /Windows NT/.test(ua);\nconst isIOS =\n    /iP(?:ad|hone|od)/.test(ua) || (isMac && !!navigator.maxTouchPoints);\nconst isAndroid = /Android/.test(ua);\n\nconst isGecko = /Gecko\\//.test(ua);\nconst isLegacyEdge = /Edge\\//.test(ua);\nconst isWebKit = !isLegacyEdge && /WebKit\\//.test(ua);\n\nconst ctrlKey = isMac || isIOS ? 'Meta-' : 'Ctrl-';\n\nconst cantFocusEmptyTextNodes = isWebKit;\n\nconst supportsInputEvents =\n    'onbeforeinput' in document && 'inputType' in new InputEvent('input');\n\n// Use [^ \\t\\r\\n] instead of \\S so that nbsp does not count as white-space\n// Include ZWS - \\u200B - because we use that as a placeholder for focusing\n// text nodes, but will strip it out after.\nconst notWS = /[^ \\t\\r\\n\\u200B]/;\n\n// ---\n\nexport {\n    DOCUMENT_POSITION_PRECEDING,\n    ELEMENT_NODE,\n    TEXT_NODE,\n    DOCUMENT_NODE,\n    DOCUMENT_FRAGMENT_NODE,\n    notWS,\n    ZWS,\n    ua,\n    isMac,\n    isWin,\n    isIOS,\n    isAndroid,\n    isGecko,\n    isLegacyEdge,\n    isWebKit,\n    ctrlKey,\n    cantFocusEmptyTextNodes,\n    supportsInputEvents,\n};\n", "import { ELEMENT_NODE, TEXT_NODE, DOCUMENT_FRAGMENT_NODE } from '../Constants';\n\n// ---\n\nconst inlineNodeNames =\n    /^(?:#text|A(?:BBR|CRONYM)?|B(?:R|D[IO])?|C(?:ITE|ODE)|D(?:ATA|EL|FN)|EM|FONT|HR|I(?:FRAME|MG|NPUT|NS)?|KBD|Q|R(?:P|T|UBY)|S(?:AMP|MALL|PAN|TR(?:IKE|ONG)|U[BP])?|TIME|U|VAR|WBR)$/;\n\nconst leafNodeNames = new Set(['BR', 'HR', 'IFRAME', 'IMG', 'INPUT']);\n\nconst UNKNOWN = 0;\nconst INLINE = 1;\nconst BLOCK = 2;\nconst CONTAINER = 3;\n\n// ---\n\nlet cache: WeakMap<Node, number> = new WeakMap();\n\nconst resetNodeCategoryCache = (): void => {\n    cache = new WeakMap();\n};\n\n// ---\n\nconst isLeaf = (node: Node): boolean => {\n    return leafNodeNames.has(node.nodeName);\n};\n\nconst getNodeCategory = (node: Node): number => {\n    switch (node.nodeType) {\n        case TEXT_NODE:\n            return INLINE;\n        case ELEMENT_NODE:\n        case DOCUMENT_FRAGMENT_NODE:\n            if (cache.has(node)) {\n                return cache.get(node) as number;\n            }\n            break;\n        default:\n            return UNKNOWN;\n    }\n\n    let nodeCategory: number;\n    if (!Array.from(node.childNodes).every(isInline)) {\n        // Malformed HTML can have block tags inside inline tags. Need to treat\n        // these as containers rather than inline. See #239.\n        nodeCategory = CONTAINER;\n    } else if (inlineNodeNames.test(node.nodeName)) {\n        nodeCategory = INLINE;\n    } else {\n        nodeCategory = BLOCK;\n    }\n    cache.set(node, nodeCategory);\n    return nodeCategory;\n};\n\nconst isInline = (node: Node): boolean => {\n    return getNodeCategory(node) === INLINE;\n};\n\nconst isBlock = (node: Node): boolean => {\n    return getNodeCategory(node) === BLOCK;\n};\n\nconst isContainer = (node: Node): boolean => {\n    return getNodeCategory(node) === CONTAINER;\n};\n\n// ---\n\nexport {\n    getNodeCategory,\n    isBlock,\n    isContainer,\n    isInline,\n    isLeaf,\n    leafNodeNames,\n    resetNodeCategoryCache,\n};\n", "import { isLeaf } from './Category';\n\n// ---\n\nconst createElement = (\n    tag: string,\n    props?: Record<string, string> | null,\n    children?: Node[],\n): HTMLElement => {\n    const el = document.createElement(tag);\n    if (props instanceof Array) {\n        children = props;\n        props = null;\n    }\n    if (props) {\n        for (const attr in props) {\n            const value = props[attr];\n            if (value !== undefined) {\n                el.setAttribute(attr, value);\n            }\n        }\n    }\n    if (children) {\n        children.forEach((node) => el.appendChild(node));\n    }\n    return el;\n};\n\n// --- Tests\n\nconst areAlike = (\n    node: HTMLElement | Node,\n    node2: HTMLElement | Node,\n): boolean => {\n    if (isLeaf(node)) {\n        return false;\n    }\n    if (node.nodeType !== node2.nodeType || node.nodeName !== node2.nodeName) {\n        return false;\n    }\n    if (node instanceof HTMLElement && node2 instanceof HTMLElement) {\n        return (\n            node.nodeName !== 'A' &&\n            node.className === node2.className &&\n            node.style.cssText === node2.style.cssText\n        );\n    }\n    return true;\n};\n\nconst hasTagAttributes = (\n    node: Node | Element,\n    tag: string,\n    attributes?: Record<string, string> | null,\n): boolean => {\n    if (node.nodeName !== tag) {\n        return false;\n    }\n    for (const attr in attributes) {\n        if (\n            !('getAttribute' in node) ||\n            node.getAttribute(attr) !== attributes[attr]\n        ) {\n            return false;\n        }\n    }\n    return true;\n};\n\n// --- Traversal\n\nconst getNearest = (\n    node: Node | null,\n    root: Element | DocumentFragment,\n    tag: string,\n    attributes?: Record<string, string> | null,\n): Node | null => {\n    while (node && node !== root) {\n        if (hasTagAttributes(node, tag, attributes)) {\n            return node;\n        }\n        node = node.parentNode;\n    }\n    return null;\n};\n\nconst getNodeBeforeOffset = (node: Node, offset: number): Node => {\n    let children = node.childNodes;\n    while (offset && node instanceof Element) {\n        node = children[offset - 1];\n        children = node.childNodes;\n        offset = children.length;\n    }\n    return node;\n};\n\nconst getNodeAfterOffset = (node: Node, offset: number): Node | null => {\n    let returnNode: Node | null = node;\n    if (returnNode instanceof Element) {\n        const children = returnNode.childNodes;\n        if (offset < children.length) {\n            returnNode = children[offset];\n        } else {\n            while (returnNode && !returnNode.nextSibling) {\n                returnNode = returnNode.parentNode;\n            }\n            if (returnNode) {\n                returnNode = returnNode.nextSibling;\n            }\n        }\n    }\n    return returnNode;\n};\n\nconst getLength = (node: Node): number => {\n    return node instanceof Element || node instanceof DocumentFragment\n        ? node.childNodes.length\n        : node instanceof CharacterData\n          ? node.length\n          : 0;\n};\n\n// --- Manipulation\n\nconst empty = (node: Node): DocumentFragment => {\n    const frag = document.createDocumentFragment();\n    let child = node.firstChild;\n    while (child) {\n        frag.appendChild(child);\n        child = node.firstChild;\n    }\n    return frag;\n};\n\nconst detach = (node: Node): Node => {\n    const parent = node.parentNode;\n    if (parent) {\n        parent.removeChild(node);\n    }\n    return node;\n};\n\nconst replaceWith = (node: Node, node2: Node): void => {\n    const parent = node.parentNode;\n    if (parent) {\n        parent.replaceChild(node2, node);\n    }\n};\n\n// --- Export\n\nexport {\n    areAlike,\n    createElement,\n    detach,\n    empty,\n    getLength,\n    getNearest,\n    getNodeAfterOffset,\n    getNodeBeforeOffset,\n    hasTagAttributes,\n    replaceWith,\n};\n", "import { ZWS, notWS } from '../Constants';\nimport { isInline } from './Category';\nimport { getLength } from './Node';\nimport { SHOW_ELEMENT_OR_TEXT, SHOW_TEXT, TreeIterator } from './TreeIterator';\n\n// ---\n\nconst notWSTextNode = (node: Node): boolean => {\n    return node instanceof Element\n        ? node.nodeName === 'BR'\n        : // okay if data is 'undefined' here.\n          notWS.test((node as CharacterData).data);\n};\n\nconst isLineBreak = (br: Element, isLBIfEmptyBlock: boolean): boolean => {\n    let block = br.parentNode!;\n    while (isInline(block)) {\n        block = block.parentNode!;\n    }\n    const walker = new TreeIterator<Element | Text>(\n        block,\n        SHOW_ELEMENT_OR_TEXT,\n        notWSTextNode,\n    );\n    walker.currentNode = br;\n    return !!walker.nextNode() || (isLBIfEmptyBlock && !walker.previousNode());\n};\n\n// --- Workaround for browsers that can't focus empty text nodes\n\n// WebKit bug: https://bugs.webkit.org/show_bug.cgi?id=15256\n\n// Walk down the tree starting at the root and remove any ZWS. If the node only\n// contained ZWS space then remove it too. We may want to keep one ZWS node at\n// the bottom of the tree so the block can be selected. Define that node as the\n// keepNode.\nconst removeZWS = (root: Node, keepNode?: Node | null): void => {\n    const walker = new TreeIterator<Text>(root, SHOW_TEXT);\n    let textNode: Text | null;\n    let index: number;\n    while ((textNode = walker.nextNode())) {\n        while (\n            (index = textNode.data.indexOf(ZWS)) > -1 &&\n            // eslint-disable-next-line no-unmodified-loop-condition\n            (!keepNode || textNode.parentNode !== keepNode)\n        ) {\n            if (textNode.length === 1) {\n                let node: Node = textNode;\n                let parent = node.parentNode;\n                while (parent) {\n                    parent.removeChild(node);\n                    walker.currentNode = parent;\n                    if (!isInline(parent) || getLength(parent)) {\n                        break;\n                    }\n                    node = parent;\n                    parent = node.parentNode;\n                }\n                break;\n            } else {\n                textNode.deleteData(index, 1);\n            }\n        }\n    }\n};\n\n// ---\n\nexport { isLineBreak, removeZWS };\n", "import { isLeaf } from '../node/Category';\nimport { getLength, getNearest } from '../node/Node';\nimport { isLineBreak } from '../node/Whitespace';\nimport { TEXT_NODE } from '../Constants';\n\n// ---\n\nconst START_TO_START = 0; // Range.START_TO_START\nconst START_TO_END = 1; // Range.START_TO_END\nconst END_TO_END = 2; // Range.END_TO_END\nconst END_TO_START = 3; // Range.END_TO_START\n\nconst isNodeContainedInRange = (\n    range: Range,\n    node: Node,\n    partial: boolean,\n): boolean => {\n    const nodeRange = document.createRange();\n    nodeRange.selectNode(node);\n    if (partial) {\n        // Node must not finish before range starts or start after range\n        // finishes.\n        const nodeEndBeforeStart =\n            range.compareBoundaryPoints(END_TO_START, nodeRange) > -1;\n        const nodeStartAfterEnd =\n            range.compareBoundaryPoints(START_TO_END, nodeRange) < 1;\n        return !nodeEndBeforeStart && !nodeStartAfterEnd;\n    } else {\n        // Node must start after range starts and finish before range\n        // finishes\n        const nodeStartAfterStart =\n            range.compareBoundaryPoints(START_TO_START, nodeRange) < 1;\n        const nodeEndBeforeEnd =\n            range.compareBoundaryPoints(END_TO_END, nodeRange) > -1;\n        return nodeStartAfterStart && nodeEndBeforeEnd;\n    }\n};\n\n/**\n * Moves the range to an equivalent position with the start/end as deep in\n * the tree as possible.\n */\nconst moveRangeBoundariesDownTree = (range: Range): void => {\n    let { startContainer, startOffset, endContainer, endOffset } = range;\n\n    while (!(startContainer instanceof Text)) {\n        let child: ChildNode | null = startContainer.childNodes[startOffset];\n        if (!child || isLeaf(child)) {\n            if (startOffset) {\n                child = startContainer.childNodes[startOffset - 1];\n                if (child instanceof Text) {\n                    // Need a new variable to satisfy TypeScript's type checker\n                    // for some reason.\n                    let textChild: Text = child;\n                    // If we have an empty text node next to another text node,\n                    // just skip and remove it.\n                    let prev: ChildNode | null;\n                    while (\n                        !textChild.length &&\n                        (prev = textChild.previousSibling) &&\n                        prev instanceof Text\n                    ) {\n                        textChild.remove();\n                        textChild = prev;\n                    }\n                    startContainer = textChild;\n                    startOffset = textChild.data.length;\n                }\n            }\n            break;\n        }\n        startContainer = child;\n        startOffset = 0;\n    }\n    if (endOffset) {\n        while (!(endContainer instanceof Text)) {\n            const child = endContainer.childNodes[endOffset - 1];\n            if (!child || isLeaf(child)) {\n                if (\n                    child &&\n                    child.nodeName === 'BR' &&\n                    !isLineBreak(child as Element, false)\n                ) {\n                    endOffset -= 1;\n                    continue;\n                }\n                break;\n            }\n            endContainer = child;\n            endOffset = getLength(endContainer);\n        }\n    } else {\n        while (!(endContainer instanceof Text)) {\n            const child = endContainer.firstChild!;\n            if (!child || isLeaf(child)) {\n                break;\n            }\n            endContainer = child;\n        }\n    }\n\n    range.setStart(startContainer, startOffset);\n    range.setEnd(endContainer, endOffset);\n};\n\nconst moveRangeBoundariesUpTree = (\n    range: Range,\n    startMax: Node,\n    endMax: Node,\n    root: Node,\n): void => {\n    let startContainer = range.startContainer;\n    let startOffset = range.startOffset;\n    let endContainer = range.endContainer;\n    let endOffset = range.endOffset;\n    let parent: Node;\n\n    if (!startMax) {\n        startMax = range.commonAncestorContainer;\n    }\n    if (!endMax) {\n        endMax = startMax;\n    }\n\n    while (\n        !startOffset &&\n        startContainer !== startMax &&\n        startContainer !== root\n    ) {\n        parent = startContainer.parentNode!;\n        startOffset = Array.from(parent.childNodes).indexOf(\n            startContainer as ChildNode,\n        );\n        startContainer = parent;\n    }\n\n    while (true) {\n        if (endContainer === endMax || endContainer === root) {\n            break;\n        }\n        if (\n            endContainer.nodeType !== TEXT_NODE &&\n            endContainer.childNodes[endOffset] &&\n            endContainer.childNodes[endOffset].nodeName === 'BR' &&\n            !isLineBreak(endContainer.childNodes[endOffset] as Element, false)\n        ) {\n            endOffset += 1;\n        }\n        if (endOffset !== getLength(endContainer)) {\n            break;\n        }\n        parent = endContainer.parentNode!;\n        endOffset =\n            Array.from(parent.childNodes).indexOf(endContainer as ChildNode) +\n            1;\n        endContainer = parent;\n    }\n\n    range.setStart(startContainer, startOffset);\n    range.setEnd(endContainer, endOffset);\n};\n\nconst moveRangeBoundaryOutOf = (\n    range: Range,\n    tag: string,\n    root: Element,\n): Range => {\n    let parent = getNearest(range.endContainer, root, tag);\n    if (parent && (parent = parent.parentNode)) {\n        const clone = range.cloneRange();\n        moveRangeBoundariesUpTree(clone, parent, parent, root);\n        if (clone.endContainer === parent) {\n            range.setStart(clone.endContainer, clone.endOffset);\n            range.setEnd(clone.endContainer, clone.endOffset);\n        }\n    }\n    return range;\n};\n\n// ---\n\nexport {\n    isNodeContainedInRange,\n    moveRangeBoundariesDownTree,\n    moveRangeBoundariesUpTree,\n    moveRangeBoundaryOutOf,\n};\n", "import { ZWS, cantFocusEmptyTextNodes, notWS } from '../Constants';\nimport {\n    createElement,\n    getNearest,\n    areAlike,\n    getLength,\n    detach,\n    empty,\n} from './Node';\nimport { isInline, isContainer } from './Category';\n\n// ---\n\nconst fixCursor = (node: Node): Node => {\n    // In Webkit and Gecko, block level elements are collapsed and\n    // unfocusable if they have no content. To remedy this, a <BR> must be\n    // inserted. In Opera and IE, we just need a textnode in order for the\n    // cursor to appear.\n    let fixer: Element | Text | null = null;\n\n    if (node instanceof Text) {\n        return node;\n    }\n\n    if (isInline(node)) {\n        let child = node.firstChild;\n        if (cantFocusEmptyTextNodes) {\n            while (child && child instanceof Text && !child.data) {\n                node.removeChild(child);\n                child = node.firstChild;\n            }\n        }\n        if (!child) {\n            if (cantFocusEmptyTextNodes) {\n                fixer = document.createTextNode(ZWS);\n            } else {\n                fixer = document.createTextNode('');\n            }\n        }\n    } else if (\n        (node instanceof Element || node instanceof DocumentFragment) &&\n        !node.querySelector('BR') &&\n        !notWS.test(node.textContent || '')\n    ) {\n        fixer = createElement('BR');\n        let parent: Element | DocumentFragment = node;\n        let child: Element | null;\n        while ((child = parent.lastElementChild) && !isInline(child)) {\n            parent = child;\n        }\n        node = parent;\n    }\n    if (fixer) {\n        try {\n            node.appendChild(fixer);\n        } catch (error) {}\n    }\n\n    return node;\n};\n\n// Recursively examine container nodes and wrap any inline children.\nconst fixContainer = (\n    container: Node,\n    root: Element | DocumentFragment,\n): Node => {\n    let wrapper: HTMLElement | null = null;\n    // We can't wrap stuff inside some tags with <div>, because of the HTML\n    // parsing rules \u2014 when you read it out as HTML then write it back, you'll\n    // end up with a different DOM tree (e.g. when inside a <p>, encountering\n    // a <div> will auto-close it). So ignore these and hope for the best.\n    if (/^(?:TABLE|TBODY|TR|TH|TD|P)/.test(container.nodeName)) {\n        return container;\n    }\n    Array.from(container.childNodes).forEach((child) => {\n        const isBR = child.nodeName === 'BR';\n        if (!isBR && isInline(child)) {\n            if (!wrapper) {\n                wrapper = createElement('DIV');\n            }\n            wrapper.appendChild(child);\n        } else if (isBR || wrapper) {\n            if (!wrapper) {\n                wrapper = createElement('DIV');\n            }\n            fixCursor(wrapper);\n            if (isBR) {\n                container.replaceChild(wrapper, child);\n            } else {\n                container.insertBefore(wrapper, child);\n            }\n            wrapper = null;\n        }\n        if (isContainer(child)) {\n            fixContainer(child, root);\n        }\n    });\n    if (wrapper) {\n        container.appendChild(fixCursor(wrapper));\n    }\n    return container;\n};\n\nconst split = (\n    node: Node,\n    offset: number | Node | null,\n    stopNode: Node,\n    root: Element | DocumentFragment,\n): Node | null => {\n    if (node instanceof Text && node !== stopNode) {\n        if (typeof offset !== 'number') {\n            throw new Error('Offset must be a number to split text node!');\n        }\n        if (!node.parentNode) {\n            throw new Error('Cannot split text node with no parent!');\n        }\n        return split(node.parentNode, node.splitText(offset), stopNode, root);\n    }\n\n    let nodeAfterSplit: Node | null =\n        typeof offset === 'number'\n            ? offset < node.childNodes.length\n                ? node.childNodes[offset]\n                : null\n            : offset;\n    const parent = node.parentNode;\n    if (!parent || node === stopNode || !(node instanceof Element)) {\n        return nodeAfterSplit;\n    }\n\n    // Clone node without children\n    const clone = node.cloneNode(false) as Element;\n\n    // Add right-hand siblings to the clone\n    while (nodeAfterSplit) {\n        const next = nodeAfterSplit.nextSibling;\n        clone.appendChild(nodeAfterSplit);\n        nodeAfterSplit = next;\n    }\n\n    // Maintain li numbering if inside a quote.\n    if (\n        node instanceof HTMLOListElement &&\n        getNearest(node, root, 'BLOCKQUOTE')\n    ) {\n        (clone as HTMLOListElement).start =\n            (+node.start || 1) + node.childNodes.length - 1;\n    }\n\n    // DO NOT NORMALISE. This may undo the fixCursor() call\n    // of a node lower down the tree!\n    // We need something in the element in order for the cursor to appear.\n    fixCursor(node);\n    fixCursor(clone);\n\n    // Inject clone after original node\n    parent.insertBefore(clone, node.nextSibling);\n\n    // Keep on splitting up the tree\n    return split(parent, clone, stopNode, root);\n};\n\nconst _mergeInlines = (\n    node: Node,\n    fakeRange: {\n        startContainer: Node;\n        startOffset: number;\n        endContainer: Node;\n        endOffset: number;\n    },\n): void => {\n    const children = node.childNodes;\n    let l = children.length;\n    const frags: DocumentFragment[] = [];\n    while (l--) {\n        const child = children[l];\n        const prev = l ? children[l - 1] : null;\n        if (prev && isInline(child) && areAlike(child, prev)) {\n            if (fakeRange.startContainer === child) {\n                fakeRange.startContainer = prev;\n                fakeRange.startOffset += getLength(prev);\n            }\n            if (fakeRange.endContainer === child) {\n                fakeRange.endContainer = prev;\n                fakeRange.endOffset += getLength(prev);\n            }\n            if (fakeRange.startContainer === node) {\n                if (fakeRange.startOffset > l) {\n                    fakeRange.startOffset -= 1;\n                } else if (fakeRange.startOffset === l) {\n                    fakeRange.startContainer = prev;\n                    fakeRange.startOffset = getLength(prev);\n                }\n            }\n            if (fakeRange.endContainer === node) {\n                if (fakeRange.endOffset > l) {\n                    fakeRange.endOffset -= 1;\n                } else if (fakeRange.endOffset === l) {\n                    fakeRange.endContainer = prev;\n                    fakeRange.endOffset = getLength(prev);\n                }\n            }\n            detach(child);\n            if (child instanceof Text) {\n                (prev as Text).appendData(child.data);\n            } else {\n                frags.push(empty(child));\n            }\n        } else if (child instanceof Element) {\n            let frag: DocumentFragment | undefined;\n            while ((frag = frags.pop())) {\n                child.appendChild(frag);\n            }\n            _mergeInlines(child, fakeRange);\n        }\n    }\n};\n\nconst mergeInlines = (node: Node, range: Range): void => {\n    const element = node instanceof Text ? node.parentNode : node;\n    if (element instanceof Element) {\n        const fakeRange = {\n            startContainer: range.startContainer,\n            startOffset: range.startOffset,\n            endContainer: range.endContainer,\n            endOffset: range.endOffset,\n        };\n        _mergeInlines(element, fakeRange);\n        range.setStart(fakeRange.startContainer, fakeRange.startOffset);\n        range.setEnd(fakeRange.endContainer, fakeRange.endOffset);\n    }\n};\n\nconst mergeWithBlock = (\n    block: Node,\n    next: Node,\n    range: Range,\n    root: Element,\n): void => {\n    let container = next;\n    let parent: Node | null;\n    let offset: number;\n    while (\n        (parent = container.parentNode) &&\n        parent !== root &&\n        parent instanceof Element &&\n        parent.childNodes.length === 1\n    ) {\n        container = parent;\n    }\n    detach(container);\n\n    offset = block.childNodes.length;\n\n    // Remove extra <BR> fixer if present.\n    const last = block.lastChild;\n    if (last && last.nodeName === 'BR') {\n        block.removeChild(last);\n        offset -= 1;\n    }\n\n    block.appendChild(empty(next));\n\n    range.setStart(block, offset);\n    range.collapse(true);\n    mergeInlines(block, range);\n};\n\nconst mergeContainers = (node: Node, root: Element): void => {\n    const prev = node.previousSibling;\n    const first = node.firstChild;\n    const isListItem = node.nodeName === 'LI';\n\n    // Do not merge LIs, unless it only contains a UL\n    if (isListItem && (!first || !/^[OU]L$/.test(first.nodeName))) {\n        return;\n    }\n\n    if (prev && areAlike(prev, node)) {\n        if (!isContainer(prev)) {\n            if (isListItem) {\n                const block = createElement('DIV');\n                block.appendChild(empty(prev));\n                prev.appendChild(block);\n            } else {\n                return;\n            }\n        }\n        detach(node);\n        const needsFix = !isContainer(node);\n        prev.appendChild(empty(node));\n        if (needsFix) {\n            fixContainer(prev, root);\n        }\n        if (first) {\n            mergeContainers(first, root);\n        }\n    } else if (isListItem) {\n        const block = createElement('DIV');\n        node.insertBefore(block, first);\n        fixCursor(block);\n    }\n};\n\n// ---\n\nexport {\n    fixContainer,\n    fixCursor,\n    mergeContainers,\n    mergeInlines,\n    mergeWithBlock,\n    split,\n};\n", "import { notWS } from './Constants';\nimport { TreeIterator, SHOW_ELEMENT_OR_TEXT } from './node/TreeIterator';\nimport { createElement, empty, detach, replaceWith } from './node/Node';\nimport { isInline, isLeaf } from './node/Category';\nimport { fixContainer } from './node/MergeSplit';\nimport { isLineBreak } from './node/Whitespace';\n\nimport type { SquireConfig } from './Editor';\n\n// ---\n\ntype StyleRewriter = (\n    node: HTMLElement,\n    parent: Node,\n    config: SquireConfig,\n) => HTMLElement;\n\n// ---\n\nconst styleToSemantic: Record<\n    string,\n    { regexp: RegExp; replace: (x: any, y: string) => HTMLElement }\n> = {\n    'font-weight': {\n        regexp: /^bold|^700/i,\n        replace(): HTMLElement {\n            return createElement('B');\n        },\n    },\n    'font-style': {\n        regexp: /^italic/i,\n        replace(): HTMLElement {\n            return createElement('I');\n        },\n    },\n    'font-family': {\n        regexp: notWS,\n        replace(\n            classNames: { fontFamily: string },\n            family: string,\n        ): HTMLElement {\n            return createElement('SPAN', {\n                class: classNames.fontFamily,\n                style: 'font-family:' + family,\n            });\n        },\n    },\n    'font-size': {\n        regexp: notWS,\n        replace(classNames: { fontSize: string }, size: string): HTMLElement {\n            return createElement('SPAN', {\n                class: classNames.fontSize,\n                style: 'font-size:' + size,\n            });\n        },\n    },\n    'text-decoration': {\n        regexp: /^underline/i,\n        replace(): HTMLElement {\n            return createElement('U');\n        },\n    },\n};\n\nconst replaceStyles = (\n    node: HTMLElement,\n    _: Node,\n    config: SquireConfig,\n): HTMLElement => {\n    const style = node.style;\n    let newTreeBottom: HTMLElement | undefined;\n    let newTreeTop: HTMLElement | undefined;\n\n    for (const attr in styleToSemantic) {\n        const converter = styleToSemantic[attr];\n        const css = style.getPropertyValue(attr);\n        if (css && converter.regexp.test(css)) {\n            const el = converter.replace(config.classNames, css);\n            if (\n                el.nodeName === node.nodeName &&\n                el.className === node.className\n            ) {\n                continue;\n            }\n            if (!newTreeTop) {\n                newTreeTop = el;\n            }\n            if (newTreeBottom) {\n                newTreeBottom.appendChild(el);\n            }\n            newTreeBottom = el;\n            node.style.removeProperty(attr);\n        }\n    }\n\n    if (newTreeTop && newTreeBottom) {\n        newTreeBottom.appendChild(empty(node));\n        if (node.style.cssText) {\n            node.appendChild(newTreeTop);\n        } else {\n            replaceWith(node, newTreeTop);\n        }\n    }\n\n    return newTreeBottom || node;\n};\n\nconst replaceWithTag = (tag: string) => {\n    return (node: HTMLElement, parent: Node) => {\n        const el = createElement(tag);\n        const attributes = node.attributes;\n        for (let i = 0, l = attributes.length; i < l; i += 1) {\n            const attribute = attributes[i];\n            el.setAttribute(attribute.name, attribute.value);\n        }\n        parent.replaceChild(el, node);\n        el.appendChild(empty(node));\n        return el;\n    };\n};\n\nconst fontSizes: Record<string, string> = {\n    '1': '10',\n    '2': '13',\n    '3': '16',\n    '4': '18',\n    '5': '24',\n    '6': '32',\n    '7': '48',\n};\n\nconst stylesRewriters: Record<string, StyleRewriter> = {\n    STRONG: replaceWithTag('B'),\n    EM: replaceWithTag('I'),\n    INS: replaceWithTag('U'),\n    STRIKE: replaceWithTag('S'),\n    SPAN: replaceStyles,\n    FONT: (\n        node: HTMLElement,\n        parent: Node,\n        config: SquireConfig,\n    ): HTMLElement => {\n        const font = node as HTMLFontElement;\n        const face = font.face;\n        const size = font.size;\n        let color = font.color;\n        const classNames = config.classNames;\n        let fontSpan: HTMLElement;\n        let sizeSpan: HTMLElement;\n        let colorSpan: HTMLElement;\n        let newTreeBottom: HTMLElement | undefined;\n        let newTreeTop: HTMLElement | undefined;\n        if (face) {\n            fontSpan = createElement('SPAN', {\n                class: classNames.fontFamily,\n                style: 'font-family:' + face,\n            });\n            newTreeTop = fontSpan;\n            newTreeBottom = fontSpan;\n        }\n        if (size) {\n            sizeSpan = createElement('SPAN', {\n                class: classNames.fontSize,\n                style: 'font-size:' + fontSizes[size] + 'px',\n            });\n            if (!newTreeTop) {\n                newTreeTop = sizeSpan;\n            }\n            if (newTreeBottom) {\n                newTreeBottom.appendChild(sizeSpan);\n            }\n            newTreeBottom = sizeSpan;\n        }\n        if (color && /^#?([\\dA-F]{3}){1,2}$/i.test(color)) {\n            if (color.charAt(0) !== '#') {\n                color = '#' + color;\n            }\n            colorSpan = createElement('SPAN', {\n                class: classNames.color,\n                style: 'color:' + color,\n            });\n            if (!newTreeTop) {\n                newTreeTop = colorSpan;\n            }\n            if (newTreeBottom) {\n                newTreeBottom.appendChild(colorSpan);\n            }\n            newTreeBottom = colorSpan;\n        }\n        if (!newTreeTop || !newTreeBottom) {\n            newTreeTop = newTreeBottom = createElement('SPAN');\n        }\n        parent.replaceChild(newTreeTop, font);\n        newTreeBottom.appendChild(empty(font));\n        return newTreeBottom;\n    },\n    TT: (node: Node, parent: Node, config: SquireConfig): HTMLElement => {\n        const el = createElement('SPAN', {\n            class: config.classNames.fontFamily,\n            style: 'font-family:menlo,consolas,\"courier new\",monospace',\n        });\n        parent.replaceChild(el, node);\n        el.appendChild(empty(node));\n        return el;\n    },\n};\n\nconst allowedBlock =\n    /^(?:A(?:DDRESS|RTICLE|SIDE|UDIO)|BLOCKQUOTE|CAPTION|D(?:[DLT]|IV)|F(?:IGURE|IGCAPTION|OOTER)|H[1-6]|HEADER|L(?:ABEL|EGEND|I)|O(?:L|UTPUT)|P(?:RE)?|SECTION|T(?:ABLE|BODY|D|FOOT|H|HEAD|R)|COL(?:GROUP)?|UL)$/;\n\nconst blacklist = /^(?:HEAD|META|STYLE)/;\n\n/*\n    Two purposes:\n\n    1. Remove nodes we don't want, such as weird <o:p> tags, comment nodes\n       and whitespace nodes.\n    2. Convert inline tags into our preferred format.\n*/\nconst cleanTree = (\n    node: Node,\n    config: SquireConfig,\n    preserveWS?: boolean,\n): Node => {\n    const children = node.childNodes;\n\n    let nonInlineParent = node;\n    while (isInline(nonInlineParent)) {\n        nonInlineParent = nonInlineParent.parentNode!;\n    }\n    const walker = new TreeIterator<Element | Text>(\n        nonInlineParent,\n        SHOW_ELEMENT_OR_TEXT,\n    );\n\n    for (let i = 0, l = children.length; i < l; i += 1) {\n        let child = children[i];\n        const nodeName = child.nodeName;\n        const rewriter = stylesRewriters[nodeName];\n        if (child instanceof HTMLElement) {\n            const childLength = child.childNodes.length;\n            if (rewriter) {\n                child = rewriter(child, node, config);\n            } else if (blacklist.test(nodeName)) {\n                node.removeChild(child);\n                i -= 1;\n                l -= 1;\n                continue;\n            } else if (!allowedBlock.test(nodeName) && !isInline(child)) {\n                i -= 1;\n                l += childLength - 1;\n                node.replaceChild(empty(child), child);\n                continue;\n            }\n            if (childLength) {\n                cleanTree(child, config, preserveWS || nodeName === 'PRE');\n            }\n        } else {\n            if (child instanceof Text) {\n                let data = child.data;\n                const startsWithWS = !notWS.test(data.charAt(0));\n                const endsWithWS = !notWS.test(data.charAt(data.length - 1));\n                if (preserveWS || (!startsWithWS && !endsWithWS)) {\n                    continue;\n                }\n                // Iterate through the nodes; if we hit some other content\n                // before the start of a new block we don't trim\n                if (startsWithWS) {\n                    walker.currentNode = child;\n                    let sibling;\n                    while ((sibling = walker.previousPONode())) {\n                        if (\n                            sibling.nodeName === 'IMG' ||\n                            (sibling instanceof Text &&\n                                notWS.test(sibling.data))\n                        ) {\n                            break;\n                        }\n                        if (!isInline(sibling)) {\n                            sibling = null;\n                            break;\n                        }\n                    }\n                    data = data.replace(/^[ \\t\\r\\n]+/g, sibling ? ' ' : '');\n                }\n                if (endsWithWS) {\n                    walker.currentNode = child;\n                    let sibling;\n                    while ((sibling = walker.nextNode())) {\n                        if (\n                            sibling.nodeName === 'IMG' ||\n                            (sibling instanceof Text &&\n                                notWS.test(sibling.data))\n                        ) {\n                            break;\n                        }\n                        if (!isInline(sibling)) {\n                            sibling = null;\n                            break;\n                        }\n                    }\n                    data = data.replace(/[ \\t\\r\\n]+$/g, sibling ? ' ' : '');\n                }\n                if (data) {\n                    child.data = data;\n                    continue;\n                }\n            }\n            node.removeChild(child);\n            i -= 1;\n            l -= 1;\n        }\n    }\n    return node;\n};\n\n// ---\n\nconst removeEmptyInlines = (node: Node): void => {\n    const children = node.childNodes;\n    let l = children.length;\n    while (l--) {\n        const child = children[l];\n        if (child instanceof Element && !isLeaf(child)) {\n            removeEmptyInlines(child);\n            if (isInline(child) && !child.firstChild) {\n                node.removeChild(child);\n            }\n        } else if (child instanceof Text && !child.data) {\n            node.removeChild(child);\n        }\n    }\n};\n\n// ---\n\n// <br> elements are treated specially, and differently depending on the\n// browser, when in rich text editor mode. When adding HTML from external\n// sources, we must remove them, replacing the ones that actually affect\n// line breaks by wrapping the inline text in a <div>. Browsers that want <br>\n// elements at the end of each block will then have them added back in a later\n// fixCursor method call.\nconst cleanupBRs = (\n    node: Element | DocumentFragment,\n    root: Element,\n    keepForBlankLine: boolean,\n): void => {\n    const brs: NodeListOf<HTMLBRElement> = node.querySelectorAll('BR');\n    const brBreaksLine: boolean[] = [];\n    let l = brs.length;\n\n    // Must calculate whether the <br> breaks a line first, because if we\n    // have two <br>s next to each other, after the first one is converted\n    // to a block split, the second will be at the end of a block and\n    // therefore seem to not be a line break. But in its original context it\n    // was, so we should also convert it to a block split.\n    for (let i = 0; i < l; i += 1) {\n        brBreaksLine[i] = isLineBreak(brs[i], keepForBlankLine);\n    }\n    while (l--) {\n        const br = brs[l];\n        // Cleanup may have removed it\n        const parent = br.parentNode;\n        if (!parent) {\n            continue;\n        }\n        // If it doesn't break a line, just remove it; it's not doing\n        // anything useful. We'll add it back later if required by the\n        // browser. If it breaks a line, wrap the content in div tags\n        // and replace the brs.\n        if (!brBreaksLine[l]) {\n            detach(br);\n        } else if (!isInline(parent)) {\n            fixContainer(parent, root);\n        }\n    }\n};\n\n// ---\n\nconst escapeHTML = (text: string): string => {\n    return text\n        .split('&')\n        .join('&amp;')\n        .split('<')\n        .join('&lt;')\n        .split('>')\n        .join('&gt;')\n        .split('\"')\n        .join('&quot;');\n};\n\n// ---\n\nexport { cleanTree, cleanupBRs, isLineBreak, removeEmptyInlines, escapeHTML };\n", "import { TreeIterator, SHOW_ELEMENT } from './TreeIterator';\nimport { isBlock } from './Category';\n\n// ---\n\nconst getBlockWalker = (\n    node: Node,\n    root: Element | DocumentFragment,\n): TreeIterator<HTMLElement> => {\n    const walker = new TreeIterator<HTMLElement>(root, SHOW_ELEMENT, isBlock);\n    walker.currentNode = node;\n    return walker;\n};\n\nconst getPreviousBlock = (\n    node: Node,\n    root: Element | DocumentFragment,\n): HTMLElement | null => {\n    const block = getBlockWalker(node, root).previousNode();\n    return block !== root ? block : null;\n};\n\nconst getNextBlock = (\n    node: Node,\n    root: Element | DocumentFragment,\n): HTMLElement | null => {\n    const block = getBlockWalker(node, root).nextNode();\n    return block !== root ? block : null;\n};\n\nconst isEmptyBlock = (block: Element): boolean => {\n    return !block.textContent && !block.querySelector('IMG');\n};\n\n// ---\n\nexport { getBlockWalker, getPreviousBlock, getNextBlock, isEmptyBlock };\n", "import { isInline, isBlock } from '../node/Category';\nimport { getPreviousBlock, getNextBlock } from '../node/Block';\nimport { getNodeBeforeOffset, getNodeAfterOffset } from '../node/Node';\nimport { ZWS, notWS } from '../Constants';\nimport { isNodeContainedInRange } from './Boundaries';\nimport { TreeIterator, SHOW_ELEMENT_OR_TEXT } from '../node/TreeIterator';\n\n// ---\n\n// Returns the first block at least partially contained by the range,\n// or null if no block is contained by the range.\nconst getStartBlockOfRange = (\n    range: Range,\n    root: Element | DocumentFragment,\n): HTMLElement | null => {\n    const container = range.startContainer;\n    let block: HTMLElement | null;\n\n    // If inline, get the containing block.\n    if (isInline(container)) {\n        block = getPreviousBlock(container, root);\n    } else if (\n        container !== root &&\n        container instanceof HTMLElement &&\n        isBlock(container)\n    ) {\n        block = container;\n    } else {\n        const node = getNodeBeforeOffset(container, range.startOffset);\n        block = getNextBlock(node, root);\n    }\n    // Check the block actually intersects the range\n    return block && isNodeContainedInRange(range, block, true) ? block : null;\n};\n\n// Returns the last block at least partially contained by the range,\n// or null if no block is contained by the range.\nconst getEndBlockOfRange = (\n    range: Range,\n    root: Element | DocumentFragment,\n): HTMLElement | null => {\n    const container = range.endContainer;\n    let block: HTMLElement | null;\n\n    // If inline, get the containing block.\n    if (isInline(container)) {\n        block = getPreviousBlock(container, root);\n    } else if (\n        container !== root &&\n        container instanceof HTMLElement &&\n        isBlock(container)\n    ) {\n        block = container;\n    } else {\n        let node = getNodeAfterOffset(container, range.endOffset);\n        if (!node || !root.contains(node)) {\n            node = root;\n            let child: Node | null;\n            while ((child = node.lastChild)) {\n                node = child;\n            }\n        }\n        block = getPreviousBlock(node, root);\n    }\n    // Check the block actually intersects the range\n    return block && isNodeContainedInRange(range, block, true) ? block : null;\n};\n\nconst isContent = (node: Element | Text): boolean => {\n    return node instanceof Text\n        ? notWS.test(node.data)\n        : node.nodeName === 'IMG';\n};\n\nconst rangeDoesStartAtBlockBoundary = (\n    range: Range,\n    root: Element,\n): boolean => {\n    const startContainer = range.startContainer;\n    const startOffset = range.startOffset;\n    let nodeAfterCursor: Node | null;\n\n    // If in the middle or end of a text node, we're not at the boundary.\n    if (startContainer instanceof Text) {\n        const text = startContainer.data;\n        for (let i = startOffset; i > 0; i -= 1) {\n            if (text.charAt(i - 1) !== ZWS) {\n                return false;\n            }\n        }\n        nodeAfterCursor = startContainer;\n    } else {\n        nodeAfterCursor = getNodeAfterOffset(startContainer, startOffset);\n        if (nodeAfterCursor && !root.contains(nodeAfterCursor)) {\n            nodeAfterCursor = null;\n        }\n        // The cursor was right at the end of the document\n        if (!nodeAfterCursor) {\n            nodeAfterCursor = getNodeBeforeOffset(startContainer, startOffset);\n            if (nodeAfterCursor instanceof Text && nodeAfterCursor.length) {\n                return false;\n            }\n        }\n    }\n\n    // Otherwise, look for any previous content in the same block.\n    const block = getStartBlockOfRange(range, root);\n    if (!block) {\n        return false;\n    }\n    const contentWalker = new TreeIterator<Element | Text>(\n        block,\n        SHOW_ELEMENT_OR_TEXT,\n        isContent,\n    );\n    contentWalker.currentNode = nodeAfterCursor;\n\n    return !contentWalker.previousNode();\n};\n\nconst rangeDoesEndAtBlockBoundary = (range: Range, root: Element): boolean => {\n    const endContainer = range.endContainer;\n    const endOffset = range.endOffset;\n    let currentNode: Node;\n\n    // If in a text node with content, and not at the end, we're not\n    // at the boundary. Ignore ZWS.\n    if (endContainer instanceof Text) {\n        const text = endContainer.data;\n        const length = text.length;\n        for (let i = endOffset; i < length; i += 1) {\n            if (text.charAt(i) !== ZWS) {\n                return false;\n            }\n        }\n        currentNode = endContainer;\n    } else {\n        currentNode = getNodeBeforeOffset(endContainer, endOffset);\n    }\n\n    // Otherwise, look for any further content in the same block.\n    const block = getEndBlockOfRange(range, root);\n    if (!block) {\n        return false;\n    }\n    const contentWalker = new TreeIterator<Element | Text>(\n        block,\n        SHOW_ELEMENT_OR_TEXT,\n        isContent,\n    );\n    contentWalker.currentNode = currentNode;\n    return !contentWalker.nextNode();\n};\n\nconst expandRangeToBlockBoundaries = (range: Range, root: Element): void => {\n    const start = getStartBlockOfRange(range, root);\n    const end = getEndBlockOfRange(range, root);\n    let parent: Node;\n\n    if (start && end) {\n        parent = start.parentNode!;\n        range.setStart(parent, Array.from(parent.childNodes).indexOf(start));\n        parent = end.parentNode!;\n        range.setEnd(parent, Array.from(parent.childNodes).indexOf(end) + 1);\n    }\n};\n\n// ---\n\nexport {\n    getStartBlockOfRange,\n    getEndBlockOfRange,\n    rangeDoesStartAtBlockBoundary,\n    rangeDoesEndAtBlockBoundary,\n    expandRangeToBlockBoundaries,\n};\n", "import { cleanupBRs } from '../Clean';\nimport {\n    split,\n    fixCursor,\n    mergeWithBlock,\n    fixContainer,\n    mergeContainers,\n} from '../node/MergeSplit';\nimport { detach, getNearest, getLength } from '../node/Node';\nimport { TreeIterator, SHOW_ELEMENT_OR_TEXT } from '../node/TreeIterator';\nimport { isInline, isContainer, isLeaf } from '../node/Category';\nimport { getNextBlock, isEmptyBlock, getPreviousBlock } from '../node/Block';\nimport {\n    getStartBlockOfRange,\n    getEndBlockOfRange,\n    rangeDoesEndAtBlockBoundary,\n    rangeDoesStartAtBlockBoundary,\n} from './Block';\nimport {\n    moveRangeBoundariesDownTree,\n    moveRangeBoundariesUpTree,\n} from './Boundaries';\n\n// ---\n\nfunction createRange(startContainer: Node, startOffset: number): Range;\nfunction createRange(\n    startContainer: Node,\n    startOffset: number,\n    endContainer: Node,\n    endOffset: number,\n): Range;\nfunction createRange(\n    startContainer: Node,\n    startOffset: number,\n    endContainer?: Node,\n    endOffset?: number,\n): Range {\n    const range = document.createRange();\n    range.setStart(startContainer, startOffset);\n    if (endContainer && typeof endOffset === 'number') {\n        range.setEnd(endContainer, endOffset);\n    } else {\n        range.setEnd(startContainer, startOffset);\n    }\n    return range;\n}\n\nconst insertNodeInRange = (range: Range, node: Node): void => {\n    // Insert at start.\n    let { startContainer, startOffset, endContainer, endOffset } = range;\n    let children: NodeListOf<ChildNode>;\n\n    // If part way through a text node, split it.\n    if (startContainer instanceof Text) {\n        const parent = startContainer.parentNode!;\n        children = parent.childNodes;\n        if (startOffset === startContainer.length) {\n            startOffset = Array.from(children).indexOf(startContainer) + 1;\n            if (range.collapsed) {\n                endContainer = parent;\n                endOffset = startOffset;\n            }\n        } else {\n            if (startOffset) {\n                const afterSplit = startContainer.splitText(startOffset);\n                if (endContainer === startContainer) {\n                    endOffset -= startOffset;\n                    endContainer = afterSplit;\n                } else if (endContainer === parent) {\n                    endOffset += 1;\n                }\n                startContainer = afterSplit;\n            }\n            startOffset = Array.from(children).indexOf(\n                startContainer as ChildNode,\n            );\n        }\n        startContainer = parent;\n    } else {\n        children = startContainer.childNodes;\n    }\n\n    const childCount = children.length;\n\n    if (startOffset === childCount) {\n        startContainer.appendChild(node);\n    } else {\n        startContainer.insertBefore(node, children[startOffset]);\n    }\n\n    if (startContainer === endContainer) {\n        endOffset += children.length - childCount;\n    }\n\n    range.setStart(startContainer, startOffset);\n    range.setEnd(endContainer, endOffset);\n};\n\n/**\n * Removes the contents of the range and returns it as a DocumentFragment.\n * The range at the end will be at the same position, with the edges just\n * before/after the split. If the start/end have the same parents, it will\n * be collapsed.\n */\nconst extractContentsOfRange = (\n    range: Range,\n    common: Node | null,\n    root: Element,\n): DocumentFragment => {\n    const frag = document.createDocumentFragment();\n    if (range.collapsed) {\n        return frag;\n    }\n\n    if (!common) {\n        common = range.commonAncestorContainer;\n    }\n    if (common instanceof Text) {\n        common = common.parentNode!;\n    }\n\n    const startContainer = range.startContainer;\n    const startOffset = range.startOffset;\n\n    let endContainer = split(range.endContainer, range.endOffset, common, root);\n    let endOffset = 0;\n\n    let node = split(startContainer, startOffset, common, root);\n    while (node && node !== endContainer) {\n        const next = node.nextSibling;\n        frag.appendChild(node);\n        node = next;\n    }\n\n    // Merge text nodes if adjacent\n    node = endContainer && endContainer.previousSibling;\n    if (node && node instanceof Text && endContainer instanceof Text) {\n        endOffset = node.length;\n        node.appendData(endContainer.data);\n        detach(endContainer);\n        endContainer = node;\n    }\n\n    range.setStart(startContainer, startOffset);\n    if (endContainer) {\n        range.setEnd(endContainer, endOffset);\n    } else {\n        // endContainer will be null if at end of parent's child nodes list.\n        range.setEnd(common, common.childNodes.length);\n    }\n\n    fixCursor(common);\n\n    return frag;\n};\n\n/**\n * Returns the next/prev node that's part of the same inline content.\n */\nconst getAdjacentInlineNode = (\n    iterator: TreeIterator<Node>,\n    method: 'nextNode' | 'previousPONode',\n    node: Node,\n): Node | null => {\n    iterator.currentNode = node;\n    let nextNode: Node | null;\n    while ((nextNode = iterator[method]())) {\n        if (nextNode instanceof Text || isLeaf(nextNode)) {\n            return nextNode;\n        }\n        if (!isInline(nextNode)) {\n            return null;\n        }\n    }\n    return null;\n};\n\nconst deleteContentsOfRange = (\n    range: Range,\n    root: Element,\n): DocumentFragment => {\n    const startBlock = getStartBlockOfRange(range, root);\n    let endBlock = getEndBlockOfRange(range, root);\n    const needsMerge = startBlock !== endBlock;\n\n    // Move boundaries up as much as possible without exiting block,\n    // to reduce need to split.\n    if (startBlock && endBlock) {\n        moveRangeBoundariesDownTree(range);\n        moveRangeBoundariesUpTree(range, startBlock, endBlock, root);\n    }\n\n    // Remove selected range\n    const frag = extractContentsOfRange(range, null, root);\n\n    // Move boundaries back down tree as far as possible.\n    moveRangeBoundariesDownTree(range);\n\n    // If we split into two different blocks, merge the blocks.\n    if (needsMerge) {\n        // endBlock will have been split, so need to refetch\n        endBlock = getEndBlockOfRange(range, root);\n        if (startBlock && endBlock && startBlock !== endBlock) {\n            mergeWithBlock(startBlock, endBlock, range, root);\n        }\n    }\n\n    // Ensure block has necessary children\n    if (startBlock) {\n        fixCursor(startBlock);\n    }\n\n    // Ensure root has a block-level element in it.\n    const child = root.firstChild;\n    if (!child || child.nodeName === 'BR') {\n        fixCursor(root);\n        if (root.firstChild) {\n            range.selectNodeContents(root.firstChild);\n        }\n    }\n\n    range.collapse(true);\n\n    // Now we may need to swap a space for a nbsp if the browser is going\n    // to swallow it due to HTML whitespace rules:\n    const startContainer = range.startContainer;\n    const startOffset = range.startOffset;\n    const iterator = new TreeIterator(root, SHOW_ELEMENT_OR_TEXT);\n\n    // Find the character after cursor point\n    let afterNode: Node | null = startContainer;\n    let afterOffset = startOffset;\n    if (!(afterNode instanceof Text) || afterOffset === afterNode.data.length) {\n        afterNode = getAdjacentInlineNode(iterator, 'nextNode', afterNode);\n        afterOffset = 0;\n    }\n\n    // Find the character before cursor point\n    let beforeNode: Node | null = startContainer;\n    let beforeOffset = startOffset - 1;\n    if (!(beforeNode instanceof Text) || beforeOffset === -1) {\n        beforeNode = getAdjacentInlineNode(\n            iterator,\n            'previousPONode',\n            afterNode ||\n                (startContainer instanceof Text\n                    ? startContainer\n                    : startContainer.childNodes[startOffset] || startContainer),\n        );\n        if (beforeNode instanceof Text) {\n            beforeOffset = beforeNode.data.length;\n        }\n    }\n\n    // If range starts at block boundary and character after cursor point\n    // is a space, replace with nbsp\n    let node = null;\n    let offset = 0;\n    if (\n        afterNode instanceof Text &&\n        afterNode.data.charAt(afterOffset) === ' ' &&\n        rangeDoesStartAtBlockBoundary(range, root)\n    ) {\n        node = afterNode;\n        offset = afterOffset;\n    } else if (\n        beforeNode instanceof Text &&\n        beforeNode.data.charAt(beforeOffset) === ' '\n    ) {\n        // If character before cursor point is a space, replace with nbsp\n        // if either:\n        // a) There is a space after it; or\n        // b) The point after is the end of the block\n        if (\n            (afterNode instanceof Text &&\n                afterNode.data.charAt(afterOffset) === ' ') ||\n            rangeDoesEndAtBlockBoundary(range, root)\n        ) {\n            node = beforeNode;\n            offset = beforeOffset;\n        }\n    }\n    if (node) {\n        node.replaceData(offset, 1, '\u00A0'); // nbsp\n    }\n    // Range needs to be put back in place\n    range.setStart(startContainer, startOffset);\n    range.collapse(true);\n\n    return frag;\n};\n\n// Contents of range will be deleted.\n// After method, range will be around inserted content\nconst insertTreeFragmentIntoRange = (\n    range: Range,\n    frag: DocumentFragment,\n    root: Element,\n): void => {\n    const firstInFragIsInline = frag.firstChild && isInline(frag.firstChild);\n    let node: Node | null;\n\n    // Fixup content: ensure no top-level inline, and add cursor fix elements.\n    fixContainer(frag, root);\n    node = frag;\n    while ((node = getNextBlock(node, root))) {\n        fixCursor(node);\n    }\n\n    // Delete any selected content.\n    if (!range.collapsed) {\n        deleteContentsOfRange(range, root);\n    }\n\n    // Move range down into text nodes.\n    moveRangeBoundariesDownTree(range);\n    range.collapse(false); // collapse to end\n\n    // Where will we split up to? First blockquote parent, otherwise root.\n    const stopPoint =\n        getNearest(range.endContainer, root, 'BLOCKQUOTE') || root;\n\n    // Merge the contents of the first block in the frag with the focused block.\n    // If there are contents in the block after the focus point, collect this\n    // up to insert in the last block later. This preserves the style that was\n    // present in this bit of the page.\n    //\n    // If the block being inserted into is empty though, replace it instead of\n    // merging if the fragment had block contents.\n    // e.g. <blockquote><p>Foo</p></blockquote>\n    // This seems a reasonable approximation of user intent.\n    let block = getStartBlockOfRange(range, root);\n    let blockContentsAfterSplit: DocumentFragment | null = null;\n    const firstBlockInFrag = getNextBlock(frag, frag);\n    const replaceBlock = !firstInFragIsInline && !!block && isEmptyBlock(block);\n    if (\n        block &&\n        firstBlockInFrag &&\n        !replaceBlock &&\n        // Don't merge table cells or PRE elements into block\n        !getNearest(firstBlockInFrag, frag, 'PRE') &&\n        !getNearest(firstBlockInFrag, frag, 'TABLE')\n    ) {\n        moveRangeBoundariesUpTree(range, block, block, root);\n        range.collapse(true); // collapse to start\n        let container = range.endContainer;\n        let offset = range.endOffset;\n        // Remove trailing <br> \u2013 we don't want this considered content to be\n        // inserted again later\n        cleanupBRs(block as HTMLElement, root, false);\n        if (isInline(container)) {\n            // Split up to block parent.\n            const nodeAfterSplit = split(\n                container,\n                offset,\n                getPreviousBlock(container, root) || root,\n                root,\n            ) as Node;\n            container = nodeAfterSplit.parentNode!;\n            offset = Array.from(container.childNodes).indexOf(\n                nodeAfterSplit as ChildNode,\n            );\n        }\n        if (/*isBlock( container ) && */ offset !== getLength(container)) {\n            // Collect any inline contents of the block after the range point\n            blockContentsAfterSplit = document.createDocumentFragment();\n            while ((node = container.childNodes[offset])) {\n                blockContentsAfterSplit.appendChild(node);\n            }\n        }\n        // And merge the first block in.\n        mergeWithBlock(container, firstBlockInFrag, range, root);\n\n        // And where we will insert\n        offset =\n            Array.from(container.parentNode!.childNodes).indexOf(\n                container as ChildNode,\n            ) + 1;\n        container = container.parentNode!;\n        range.setEnd(container, offset);\n    }\n\n    // Is there still any content in the fragment?\n    if (getLength(frag)) {\n        if (replaceBlock && block) {\n            range.setEndBefore(block);\n            range.collapse(false);\n            detach(block);\n        }\n        moveRangeBoundariesUpTree(range, stopPoint, stopPoint, root);\n        // Now split after block up to blockquote (if a parent) or root\n        let nodeAfterSplit = split(\n            range.endContainer,\n            range.endOffset,\n            stopPoint,\n            root,\n        ) as Node | null;\n        const nodeBeforeSplit = nodeAfterSplit\n            ? nodeAfterSplit.previousSibling\n            : stopPoint.lastChild;\n        stopPoint.insertBefore(frag, nodeAfterSplit);\n        if (nodeAfterSplit) {\n            range.setEndBefore(nodeAfterSplit);\n        } else {\n            range.setEnd(stopPoint, getLength(stopPoint));\n        }\n        block = getEndBlockOfRange(range, root);\n\n        // Get a reference that won't be invalidated if we merge containers.\n        moveRangeBoundariesDownTree(range);\n        const container = range.endContainer;\n        const offset = range.endOffset;\n\n        // Merge inserted containers with edges of split\n        if (nodeAfterSplit && isContainer(nodeAfterSplit)) {\n            mergeContainers(nodeAfterSplit, root);\n        }\n        nodeAfterSplit = nodeBeforeSplit && nodeBeforeSplit.nextSibling;\n        if (nodeAfterSplit && isContainer(nodeAfterSplit)) {\n            mergeContainers(nodeAfterSplit, root);\n        }\n        range.setEnd(container, offset);\n    }\n\n    // Insert inline content saved from before.\n    if (blockContentsAfterSplit && block) {\n        const tempRange = range.cloneRange();\n        fixCursor(blockContentsAfterSplit);\n        mergeWithBlock(block, blockContentsAfterSplit, tempRange, root);\n        range.setEnd(tempRange.endContainer, tempRange.endOffset);\n    }\n    moveRangeBoundariesDownTree(range);\n};\n\n// ---\n\nexport {\n    createRange,\n    deleteContentsOfRange,\n    extractContentsOfRange,\n    insertNodeInRange,\n    insertTreeFragmentIntoRange,\n};\n", "import { SHOW_ELEMENT_OR_TEXT, TreeIterator } from '../node/TreeIterator';\nimport { isNodeContainedInRange } from './Boundaries';\nimport { isInline } from '../node/Category';\n\n// ---\n\nconst getTextContentsOfRange = (range: Range) => {\n    if (range.collapsed) {\n        return '';\n    }\n    const startContainer = range.startContainer;\n    const endContainer = range.endContainer;\n    const walker = new TreeIterator<Element | Text>(\n        range.commonAncestorContainer,\n        SHOW_ELEMENT_OR_TEXT,\n        (node) => {\n            return isNodeContainedInRange(range, node, true);\n        },\n    );\n    walker.currentNode = startContainer;\n\n    let node: Node | null = startContainer;\n    let textContent = '';\n    let addedTextInBlock = false;\n    let value: string;\n\n    if (\n        (!(node instanceof Element) && !(node instanceof Text)) ||\n        !walker.filter(node)\n    ) {\n        node = walker.nextNode();\n    }\n\n    while (node) {\n        if (node instanceof Text) {\n            value = node.data;\n            if (value && /\\S/.test(value)) {\n                if (node === endContainer) {\n                    value = value.slice(0, range.endOffset);\n                }\n                if (node === startContainer) {\n                    value = value.slice(range.startOffset);\n                }\n                textContent += value;\n                addedTextInBlock = true;\n            }\n        } else if (\n            node.nodeName === 'BR' ||\n            (addedTextInBlock && !isInline(node))\n        ) {\n            textContent += '\\n';\n            addedTextInBlock = false;\n        }\n        node = walker.nextNode();\n    }\n    // Replace nbsp with regular space;\n    // eslint-disable-next-line no-irregular-whitespace\n    textContent = textContent.replace(/\u00A0/g, ' ');\n\n    return textContent;\n};\n\n// ---\n\nexport { getTextContentsOfRange };\n", "import { isWin, isGecko, isLegacyEdge, notWS } from './Constants';\nimport { createElement, detach } from './node/Node';\nimport { getStartBlockOfRange, getEndBlockOfRange } from './range/Block';\nimport { createRange, deleteContentsOfRange } from './range/InsertDelete';\n\nimport type { Squire } from './Editor';\nimport { getTextContentsOfRange } from './range/Contents';\n\n// ---\n\nconst indexOf = Array.prototype.indexOf;\n\nconst extractRangeToClipboard = (\n    event: ClipboardEvent,\n    range: Range,\n    root: HTMLElement,\n    removeRangeFromDocument: boolean,\n    toCleanHTML: null | ((html: string) => string),\n    toPlainText: null | ((html: string) => string),\n    plainTextOnly: boolean,\n): boolean => {\n    // Edge only seems to support setting plain text as of 2016-03-11.\n    const clipboardData = event.clipboardData;\n    if (isLegacyEdge || !clipboardData) {\n        return false;\n    }\n    // First get the plain text version from the range (unless we have a custom\n    // HTML -> Text conversion fn)\n    let text = toPlainText ? '' : getTextContentsOfRange(range);\n\n    // Clipboard content should include all parents within block, or all\n    // parents up to root if selection across blocks\n    const startBlock = getStartBlockOfRange(range, root);\n    const endBlock = getEndBlockOfRange(range, root);\n    let copyRoot = root;\n\n    // If the content is not in well-formed blocks, the start and end block\n    // may be the same, but actually the range goes outside it. Must check!\n    if (\n        startBlock === endBlock &&\n        startBlock?.contains(range.commonAncestorContainer)\n    ) {\n        copyRoot = startBlock;\n    }\n\n    // Extract the contents\n    let contents: Node;\n    if (removeRangeFromDocument) {\n        contents = deleteContentsOfRange(range, root);\n    } else {\n        contents = range.cloneContents();\n    }\n\n    // Add any other parents not in extracted content, up to copy root\n    let parent = range.commonAncestorContainer;\n    if (parent instanceof Text) {\n        parent = parent.parentNode!;\n    }\n    while (parent && parent !== copyRoot) {\n        const newContents = parent.cloneNode(false);\n        newContents.appendChild(contents);\n        contents = newContents;\n        parent = parent.parentNode!;\n    }\n\n    // Get HTML version of data\n    let html: string | undefined;\n    if (\n        contents.childNodes.length === 1 &&\n        contents.childNodes[0] instanceof Text\n    ) {\n        // Replace nbsp with regular space;\n        // eslint-disable-next-line no-irregular-whitespace\n        text = contents.childNodes[0].data.replace(/\u00A0/g, ' ');\n        plainTextOnly = true;\n    } else {\n        const node = createElement('DIV') as HTMLDivElement;\n        node.appendChild(contents);\n        html = node.innerHTML;\n        if (toCleanHTML) {\n            html = toCleanHTML(html);\n        }\n    }\n\n    // Get Text version of data if converting from HTML\n    if (toPlainText && html !== undefined) {\n        text = toPlainText(html);\n    }\n\n    // Firefox (and others?) returns unix line endings (\\n) even on Windows.\n    // If on Windows, normalise to \\r\\n, since Notepad and some other crappy\n    // apps do not understand just \\n.\n    if (isWin) {\n        text = text.replace(/\\r?\\n/g, '\\r\\n');\n    }\n\n    // Set clipboard data\n    if (!plainTextOnly && html && text !== html) {\n        html = '<!-- squire -->' + html;\n        clipboardData.setData('text/html', html);\n    }\n    clipboardData.setData('text/plain', text);\n    event.preventDefault();\n\n    return true;\n};\n\n// ---\n\nconst _onCut = function (this: Squire, event: ClipboardEvent): void {\n    const range: Range = this.getSelection();\n    const root: HTMLElement = this._root;\n\n    // Nothing to do\n    if (range.collapsed) {\n        event.preventDefault();\n        return;\n    }\n\n    // Save undo checkpoint\n    this.saveUndoState(range);\n\n    const handled = extractRangeToClipboard(\n        event,\n        range,\n        root,\n        true,\n        this._config.willCutCopy,\n        this._config.toPlainText,\n        false,\n    );\n    if (!handled) {\n        setTimeout(() => {\n            try {\n                // If all content removed, ensure div at start of root.\n                this._ensureBottomLine();\n            } catch (error) {\n                this._config.didError(error);\n            }\n        }, 0);\n    }\n\n    this.setSelection(range);\n};\n\nconst _onCopy = function (this: Squire, event: ClipboardEvent): void {\n    extractRangeToClipboard(\n        event,\n        this.getSelection(),\n        this._root,\n        false,\n        this._config.willCutCopy,\n        this._config.toPlainText,\n        false,\n    );\n};\n\n// Need to monitor for shift key like this, as event.shiftKey is not available\n// in paste event.\nconst _monitorShiftKey = function (this: Squire, event: KeyboardEvent): void {\n    this._isShiftDown = event.shiftKey;\n};\n\nconst _onPaste = function (this: Squire, event: ClipboardEvent): void {\n    const clipboardData = event.clipboardData;\n    const items = clipboardData?.items;\n    const choosePlain: boolean | undefined = this._isShiftDown;\n    let hasRTF = false;\n    let hasImage = false;\n    let plainItem: null | DataTransferItem = null;\n    let htmlItem: null | DataTransferItem = null;\n\n    // Current HTML5 Clipboard interface\n    // ---------------------------------\n    // https://html.spec.whatwg.org/multipage/interaction.html\n    if (items) {\n        let l = items.length;\n        while (l--) {\n            const item = items[l];\n            const type = item.type;\n            if (type === 'text/html') {\n                htmlItem = item;\n                // iOS copy URL gives you type text/uri-list which is just a list\n                // of 1 or more URLs separated by new lines. Can just treat as\n                // plain text.\n            } else if (type === 'text/plain' || type === 'text/uri-list') {\n                plainItem = item;\n            } else if (type === 'text/rtf') {\n                hasRTF = true;\n            } else if (/^image\\/.*/.test(type)) {\n                hasImage = true;\n            }\n        }\n\n        // Treat image paste as a drop of an image file. When you copy\n        // an image in Chrome/Firefox (at least), it copies the image data\n        // but also an HTML version (referencing the original URL of the image)\n        // and a plain text version.\n        //\n        // However, when you copy in Excel, you get html, rtf, text, image;\n        // in this instance you want the html version! So let's try using\n        // the presence of text/rtf as an indicator to choose the html version\n        // over the image.\n        if (hasImage && !(hasRTF && htmlItem)) {\n            event.preventDefault();\n            this.fireEvent('pasteImage', {\n                clipboardData,\n            });\n            return;\n        }\n\n        // Edge only provides access to plain text as of 2016-03-11 and gives no\n        // indication there should be an HTML part. However, it does support\n        // access to image data, so we check for that first. Otherwise though,\n        // fall through to fallback clipboard handling methods\n        if (!isLegacyEdge) {\n            event.preventDefault();\n            if (htmlItem && (!choosePlain || !plainItem)) {\n                htmlItem.getAsString((html) => {\n                    this.insertHTML(html, true);\n                });\n            } else if (plainItem) {\n                plainItem.getAsString((text) => {\n                    // If we have a selection and text is solely a URL,\n                    // just make the text a link.\n                    const range = this.getSelection();\n                    if (!range.collapsed && notWS.test(range.toString())) {\n                        const match = this.linkRegExp.exec(text);\n                        const isLink =\n                            !!match && match[0].length === text.length;\n                        if (isLink) {\n                            const href = match[1]\n                                ? /^(?:ht|f)tps?:/i.test(match[1])\n                                    ? match[1]\n                                    : 'http://' + match[1]\n                                : 'mailto:' + match[0];\n                            this.makeLink(href);\n                            return;\n                        }\n                    }\n                    this.insertPlainText(text, true);\n                });\n            }\n            return;\n        }\n    }\n\n    // Old interface\n    // -------------\n\n    // Safari (and indeed many other OS X apps) copies stuff as text/rtf\n    // rather than text/html; even from a webpage in Safari. The only way\n    // to get an HTML version is to fallback to letting the browser insert\n    // the content. Same for getting image data. *Sigh*.\n    //\n    // Firefox is even worse: it doesn't even let you know that there might be\n    // an RTF version on the clipboard, but it will also convert to HTML if you\n    // let the browser insert the content. I've filed\n    // https://bugzilla.mozilla.org/show_bug.cgi?id=1254028\n    const types = clipboardData?.types;\n    if (\n        !isLegacyEdge &&\n        types &&\n        (indexOf.call(types, 'text/html') > -1 ||\n            (!isGecko &&\n                indexOf.call(types, 'text/plain') > -1 &&\n                indexOf.call(types, 'text/rtf') < 0))\n    ) {\n        event.preventDefault();\n        // Abiword on Linux copies a plain text and html version, but the HTML\n        // version is the empty string! So always try to get HTML, but if none,\n        // insert plain text instead. On iOS, Facebook (and possibly other\n        // apps?) copy links as type text/uri-list, but also insert a **blank**\n        // text/plain item onto the clipboard. Why? Who knows.\n        let data;\n        if (!choosePlain && (data = clipboardData.getData('text/html'))) {\n            this.insertHTML(data, true);\n        } else if (\n            (data = clipboardData.getData('text/plain')) ||\n            (data = clipboardData.getData('text/uri-list'))\n        ) {\n            this.insertPlainText(data, true);\n        }\n        return;\n    }\n\n    // No interface. Includes all versions of IE :(\n    // --------------------------------------------\n\n    const body = document.body;\n    const range = this.getSelection();\n    const startContainer = range.startContainer;\n    const startOffset = range.startOffset;\n    const endContainer = range.endContainer;\n    const endOffset = range.endOffset;\n\n    // We need to position the pasteArea in the visible portion of the screen\n    // to stop the browser auto-scrolling.\n    let pasteArea: Element = createElement('DIV', {\n        contenteditable: 'true',\n        style: 'position:fixed; overflow:hidden; top:0; right:100%; width:1px; height:1px;',\n    });\n    body.appendChild(pasteArea);\n    range.selectNodeContents(pasteArea);\n    this.setSelection(range);\n\n    // A setTimeout of 0 means this is added to the back of the\n    // single javascript thread, so it will be executed after the\n    // paste event.\n    setTimeout(() => {\n        try {\n            // Get the pasted content and clean\n            let html = '';\n            let next: Element = pasteArea;\n            let first: Node | null;\n\n            // #88: Chrome can apparently split the paste area if certain\n            // content is inserted; gather them all up.\n            while ((pasteArea = next)) {\n                next = pasteArea.nextSibling as Element;\n                detach(pasteArea);\n                // Safari and IE like putting extra divs around things.\n                first = pasteArea.firstChild;\n                if (\n                    first &&\n                    first === pasteArea.lastChild &&\n                    first instanceof HTMLDivElement\n                ) {\n                    pasteArea = first;\n                }\n                html += pasteArea.innerHTML;\n            }\n\n            this.setSelection(\n                createRange(\n                    startContainer,\n                    startOffset,\n                    endContainer,\n                    endOffset,\n                ),\n            );\n\n            if (html) {\n                this.insertHTML(html, true);\n            }\n        } catch (error) {\n            this._config.didError(error);\n        }\n    }, 0);\n};\n\n// On Windows you can drag an drop text. We can't handle this ourselves, because\n// as far as I can see, there's no way to get the drop insertion point. So just\n// save an undo state and hope for the best.\nconst _onDrop = function (this: Squire, event: DragEvent): void {\n    // it's possible for dataTransfer to be null, let's avoid it.\n    if (!event.dataTransfer) {\n        return;\n    }\n    const types = event.dataTransfer.types;\n    let l = types.length;\n    let hasPlain = false;\n    let hasHTML = false;\n    while (l--) {\n        switch (types[l]) {\n            case 'text/plain':\n                hasPlain = true;\n                break;\n            case 'text/html':\n                hasHTML = true;\n                break;\n            default:\n                return;\n        }\n    }\n    if (hasHTML || (hasPlain && this.saveUndoState)) {\n        this.saveUndoState();\n    }\n};\n\n// ---\n\nexport {\n    extractRangeToClipboard,\n    _onCut,\n    _onCopy,\n    _monitorShiftKey,\n    _onPaste,\n    _onDrop,\n};\n", "import type { Squire } from '../Editor';\n\n// ---\n\nconst Enter = (self: Squire, event: KeyboardEvent, range: Range): void => {\n    event.preventDefault();\n    self.splitBlock(event.shiftKey, range);\n};\n\n// ---\n\nexport { Enter };\n", "import { ZWS } from '../Constants';\nimport { getPreviousBlock } from '../node/Block';\nimport { isInline, isBlock } from '../node/Category';\nimport { fixCursor } from '../node/MergeSplit';\nimport { createElement, detach, getNearest } from '../node/Node';\nimport { moveRangeBoundariesDownTree } from '../range/Boundaries';\n\nimport type { Squire } from '../Editor';\n\n// ---\n\n// If you delete the content inside a span with a font styling, Webkit will\n// replace it with a <font> tag (!). If you delete all the text inside a\n// link in Opera, it won't delete the link. Let's make things consistent. If\n// you delete all text inside an inline tag, remove the inline tag.\nconst afterDelete = (self: Squire, range?: Range): void => {\n    try {\n        if (!range) {\n            range = self.getSelection();\n        }\n        let node = range!.startContainer;\n        // Climb the tree from the focus point while we are inside an empty\n        // inline element\n        if (node instanceof Text) {\n            node = node.parentNode!;\n        }\n        let parent = node;\n        while (\n            isInline(parent) &&\n            (!parent.textContent || parent.textContent === ZWS)\n        ) {\n            node = parent;\n            parent = node.parentNode!;\n        }\n        // If focused in empty inline element\n        if (node !== parent) {\n            // Move focus to just before empty inline(s)\n            range!.setStart(\n                parent,\n                Array.from(parent.childNodes as NodeListOf<Node>).indexOf(node),\n            );\n            range!.collapse(true);\n            // Remove empty inline(s)\n            parent.removeChild(node);\n            // Fix cursor in block\n            if (!isBlock(parent)) {\n                parent = getPreviousBlock(parent, self._root) || self._root;\n            }\n            fixCursor(parent);\n            // Move cursor into text node\n            moveRangeBoundariesDownTree(range!);\n        }\n        // If you delete the last character in the sole <div> in Chrome,\n        // it removes the div and replaces it with just a <br> inside the\n        // root. Detach the <br>; the _ensureBottomLine call will insert a new\n        // block.\n        if (\n            node === self._root &&\n            (node = node.firstChild!) &&\n            node.nodeName === 'BR'\n        ) {\n            detach(node);\n        }\n        self._ensureBottomLine();\n        self.setSelection(range);\n        self._updatePath(range, true);\n    } catch (error) {\n        self._config.didError(error);\n    }\n};\n\nconst detachUneditableNode = (node: Node, root: Element): void => {\n    let parent: Node | null;\n    while ((parent = node.parentNode)) {\n        if (parent === root || (parent as HTMLElement).isContentEditable) {\n            break;\n        }\n        node = parent;\n    }\n    detach(node);\n};\n\n// ---\n\nconst linkifyText = (self: Squire, textNode: Text, offset: number): void => {\n    if (getNearest(textNode, self._root, 'A')) {\n        return;\n    }\n    const data = textNode.data || '';\n    const searchFrom =\n        Math.max(\n            data.lastIndexOf(' ', offset - 1),\n            data.lastIndexOf('\u00A0', offset - 1),\n        ) + 1;\n    const searchText = data.slice(searchFrom, offset);\n    const match = self.linkRegExp.exec(searchText);\n    if (match) {\n        // Record an undo point\n        const selection = self.getSelection();\n        self._docWasChanged();\n        self._recordUndoState(selection);\n        self._getRangeAndRemoveBookmark(selection);\n\n        const index = searchFrom + match.index;\n        const endIndex = index + match[0].length;\n        const needsSelectionUpdate = selection.startContainer === textNode;\n        const newSelectionOffset = selection.startOffset - endIndex;\n        if (index) {\n            textNode = textNode.splitText(index);\n        }\n\n        const defaultAttributes = self._config.tagAttributes.a;\n        const link = createElement(\n            'A',\n            Object.assign(\n                {\n                    href: match[1]\n                        ? /^(?:ht|f)tps?:/i.test(match[1])\n                            ? match[1]\n                            : 'http://' + match[1]\n                        : 'mailto:' + match[0],\n                },\n                defaultAttributes,\n            ),\n        );\n        link.textContent = data.slice(index, endIndex);\n        textNode.parentNode!.insertBefore(link, textNode);\n        textNode.data = data.slice(endIndex);\n\n        if (needsSelectionUpdate) {\n            selection.setStart(textNode, newSelectionOffset);\n            selection.setEnd(textNode, newSelectionOffset);\n        }\n        self.setSelection(selection);\n    }\n};\n\n// ---\n\nexport { afterDelete, detachUneditableNode, linkifyText };\n", "import type { Squire } from '../Editor';\nimport { getPreviousBlock } from '../node/Block';\nimport {\n    fixContainer,\n    mergeContainers,\n    mergeWithBlock,\n} from '../node/MergeSplit';\nimport { getNearest } from '../node/Node';\nimport {\n    getStartBlockOfRange,\n    rangeDoesStartAtBlockBoundary,\n} from '../range/Block';\nimport { moveRangeBoundariesDownTree } from '../range/Boundaries';\nimport { deleteContentsOfRange } from '../range/InsertDelete';\nimport { afterDelete, detachUneditableNode } from './KeyHelpers';\n\n// ---\n\nconst Backspace = (self: Squire, event: KeyboardEvent, range: Range): void => {\n    const root: Element = self._root;\n    self._removeZWS();\n    // Record undo checkpoint.\n    self.saveUndoState(range);\n    if (!range.collapsed) {\n        // If not collapsed, delete contents\n        event.preventDefault();\n        deleteContentsOfRange(range, root);\n        afterDelete(self, range);\n    } else if (rangeDoesStartAtBlockBoundary(range, root)) {\n        // If at beginning of block, merge with previous\n        event.preventDefault();\n        const startBlock = getStartBlockOfRange(range, root);\n        if (!startBlock) {\n            return;\n        }\n        let current = startBlock;\n        // In case inline data has somehow got between blocks.\n        fixContainer(current.parentNode!, root);\n        // Now get previous block\n        const previous = getPreviousBlock(current, root);\n        // Must not be at the very beginning of the text area.\n        if (previous) {\n            // If not editable, just delete whole block.\n            if (!(previous as HTMLElement).isContentEditable) {\n                detachUneditableNode(previous, root);\n                return;\n            }\n            // Otherwise merge.\n            mergeWithBlock(previous, current, range, root);\n            // If deleted line between containers, merge newly adjacent\n            // containers.\n            current = previous.parentNode as HTMLElement;\n            while (current !== root && !current.nextSibling) {\n                current = current.parentNode as HTMLElement;\n            }\n            if (\n                current !== root &&\n                (current = current.nextSibling as HTMLElement)\n            ) {\n                mergeContainers(current, root);\n            }\n            self.setSelection(range);\n            // If at very beginning of text area, allow backspace\n            // to break lists/blockquote.\n        } else if (current) {\n            if (\n                getNearest(current, root, 'UL') ||\n                getNearest(current, root, 'OL')\n            ) {\n                // Break list\n                self.decreaseListLevel(range);\n                return;\n            } else if (getNearest(current, root, 'BLOCKQUOTE')) {\n                // Break blockquote\n                self.removeQuote(range);\n                return;\n            }\n            self.setSelection(range);\n            self._updatePath(range, true);\n        }\n    } else {\n        // If deleting text inside a link that looks like a URL, delink.\n        // This is to allow you to easily correct auto-linked text.\n        moveRangeBoundariesDownTree(range);\n        const text = range.startContainer;\n        const offset = range.startOffset;\n        const a = text.parentNode;\n        if (\n            text instanceof Text &&\n            a instanceof HTMLAnchorElement &&\n            offset &&\n            a.href.includes(text.data)\n        ) {\n            text.deleteData(offset - 1, 1);\n            self.setSelection(range);\n            self.removeLink();\n            event.preventDefault();\n        } else {\n            // Otherwise, leave to browser but check afterwards whether it has\n            // left behind an empty inline tag.\n            self.setSelection(range);\n            setTimeout(() => {\n                afterDelete(self);\n            }, 0);\n        }\n    }\n};\n\n// ---\n\nexport { Backspace };\n", "import { getNextBlock } from '../node/Block';\nimport {\n    fixContainer,\n    mergeWithBlock,\n    mergeContainers,\n} from '../node/MergeSplit';\nimport { detach } from '../node/Node';\nimport {\n    rangeDoesEndAtBlockBoundary,\n    getStartBlockOfRange,\n} from '../range/Block';\nimport {\n    moveRangeBoundariesUpTree,\n    moveRangeBoundariesDownTree,\n} from '../range/Boundaries';\nimport { deleteContentsOfRange } from '../range/InsertDelete';\nimport { afterDelete, detachUneditableNode } from './KeyHelpers';\n\nimport type { Squire } from '../Editor';\n\n// ---\n\nconst Delete = (self: Squire, event: KeyboardEvent, range: Range): void => {\n    const root = self._root;\n    let current: Node | null;\n    let next: Node | null;\n    let originalRange: Range;\n    let cursorContainer: Node;\n    let cursorOffset: number;\n    let nodeAfterCursor: Node;\n    self._removeZWS();\n    // Record undo checkpoint.\n    self.saveUndoState(range);\n    // If not collapsed, delete contents\n    if (!range.collapsed) {\n        event.preventDefault();\n        deleteContentsOfRange(range, root);\n        afterDelete(self, range);\n        // If at end of block, merge next into this block\n    } else if (rangeDoesEndAtBlockBoundary(range, root)) {\n        event.preventDefault();\n        current = getStartBlockOfRange(range, root);\n        if (!current) {\n            return;\n        }\n        // In case inline data has somehow got between blocks.\n        fixContainer(current.parentNode!, root);\n        // Now get next block\n        next = getNextBlock(current, root);\n        // Must not be at the very end of the text area.\n        if (next) {\n            // If not editable, just delete whole block.\n            if (!(next as HTMLElement).isContentEditable) {\n                detachUneditableNode(next, root);\n                return;\n            }\n            // Otherwise merge.\n            mergeWithBlock(current, next, range, root);\n            // If deleted line between containers, merge newly adjacent\n            // containers.\n            next = current.parentNode!;\n            while (next !== root && !next.nextSibling) {\n                next = next.parentNode!;\n            }\n            if (next !== root && (next = next.nextSibling)) {\n                mergeContainers(next, root);\n            }\n            self.setSelection(range);\n            self._updatePath(range, true);\n        }\n        // Otherwise, leave to browser but check afterwards whether it has\n        // left behind an empty inline tag.\n    } else {\n        // But first check if the cursor is just before an IMG tag. If so,\n        // delete it ourselves, because the browser won't if it is not\n        // inline.\n        originalRange = range.cloneRange();\n        moveRangeBoundariesUpTree(range, root, root, root);\n        cursorContainer = range.endContainer;\n        cursorOffset = range.endOffset;\n        if (cursorContainer instanceof Element) {\n            nodeAfterCursor = cursorContainer.childNodes[cursorOffset];\n            if (nodeAfterCursor && nodeAfterCursor.nodeName === 'IMG') {\n                event.preventDefault();\n                detach(nodeAfterCursor);\n                moveRangeBoundariesDownTree(range);\n                afterDelete(self, range);\n                return;\n            }\n        }\n        self.setSelection(originalRange);\n        setTimeout(() => {\n            afterDelete(self);\n        }, 0);\n    }\n};\n\n// ---\n\nexport { Delete };\n", "import {\n    rangeDoesStartAtBlockBoundary,\n    getStartBlockOfRange,\n} from '../range/Block';\nimport { getNearest } from '../node/Node';\n\nimport type { Squire } from '../Editor';\n\n// ---\n\nconst Tab = (self: Squire, event: KeyboardEvent, range: Range): void => {\n    const root = self._root;\n    self._removeZWS();\n    // If no selection and at start of block\n    if (range.collapsed && rangeDoesStartAtBlockBoundary(range, root)) {\n        let node: Node = getStartBlockOfRange(range, root)!;\n        // Iterate through the block's parents\n        let parent: Node | null;\n        while ((parent = node.parentNode)) {\n            // If we find a UL or OL (so are in a list, node must be an LI)\n            if (parent.nodeName === 'UL' || parent.nodeName === 'OL') {\n                // Then increase the list level\n                event.preventDefault();\n                self.increaseListLevel(range);\n                break;\n            }\n            node = parent;\n        }\n    }\n};\n\nconst ShiftTab = (self: Squire, event: KeyboardEvent, range: Range): void => {\n    const root = self._root;\n    self._removeZWS();\n    // If no selection and at start of block\n    if (range.collapsed && rangeDoesStartAtBlockBoundary(range, root)) {\n        // Break list\n        const node = range.startContainer;\n        if (getNearest(node, root, 'UL') || getNearest(node, root, 'OL')) {\n            event.preventDefault();\n            self.decreaseListLevel(range);\n        }\n    }\n};\n\n// ---\n\nexport { Tab, ShiftTab };\n", "import { detach, getLength } from '../node/Node';\nimport { moveRangeBoundariesDownTree } from '../range/Boundaries';\nimport { deleteContentsOfRange } from '../range/InsertDelete';\n\nimport type { Squire } from '../Editor';\nimport { linkifyText } from './KeyHelpers';\nimport {\n    getStartBlockOfRange,\n    rangeDoesEndAtBlockBoundary,\n} from '../range/Block';\nimport { SHOW_TEXT, TreeIterator } from '../node/TreeIterator';\nimport { ZWS } from '../Constants';\n\n// ---\n\nconst Space = (self: Squire, event: KeyboardEvent, range: Range): void => {\n    let node: Node | null;\n    const root = self._root;\n    self._recordUndoState(range);\n    self._getRangeAndRemoveBookmark(range);\n\n    // Delete the selection if not collapsed\n    if (!range.collapsed) {\n        deleteContentsOfRange(range, root);\n        self._ensureBottomLine();\n        self.setSelection(range);\n        self._updatePath(range, true);\n    } else if (rangeDoesEndAtBlockBoundary(range, root)) {\n        const block = getStartBlockOfRange(range, root);\n        if (block && block.nodeName !== 'PRE') {\n            const text = block.textContent?.trimEnd().replace(ZWS, '');\n            if (text === '*' || text === '1.') {\n                event.preventDefault();\n                self.insertPlainText(' ', false);\n                self._docWasChanged();\n                self.saveUndoState(range);\n                const walker = new TreeIterator<Text>(block, SHOW_TEXT);\n                let textNode: Text | null;\n                while ((textNode = walker.nextNode())) {\n                    detach(textNode);\n                }\n                if (text === '*') {\n                    self.makeUnorderedList();\n                } else {\n                    self.makeOrderedList();\n                }\n                return;\n            }\n        }\n    }\n\n    // If the cursor is at the end of a link (<a>foo|</a>) then move it\n    // outside of the link (<a>foo</a>|) so that the space is not part of\n    // the link text.\n    node = range.endContainer;\n    if (range.endOffset === getLength(node)) {\n        do {\n            if (node.nodeName === 'A') {\n                range.setStartAfter(node);\n                break;\n            }\n        } while (\n            !node.nextSibling &&\n            (node = node.parentNode) &&\n            node !== root\n        );\n    }\n\n    // Linkify text\n    if (self._config.addLinks) {\n        const linkRange = range.cloneRange();\n        moveRangeBoundariesDownTree(linkRange);\n        const textNode = linkRange.startContainer as Text;\n        const offset = linkRange.startOffset;\n        setTimeout(() => {\n            linkifyText(self, textNode, offset);\n        }, 0);\n    }\n\n    self.setSelection(range);\n};\n\n// ---\n\nexport { Space };\n", "import {\n    isMac,\n    isWin,\n    isIOS,\n    ctrlKey,\n    supportsInputEvents,\n} from '../Constants';\nimport { deleteContentsOfRange } from '../range/InsertDelete';\nimport type { Squire } from '../Editor';\nimport { Enter } from './Enter';\nimport { Backspace } from './Backspace';\nimport { Delete } from './Delete';\nimport { ShiftTab, Tab } from './Tab';\nimport { Space } from './Space';\nimport { rangeDoesEndAtBlockBoundary } from '../range/Block';\nimport { moveRangeBoundariesDownTree } from '../range/Boundaries';\n\n// ---\n\nconst _onKey = function (this: Squire, event: KeyboardEvent): void {\n    // Ignore key events where event.isComposing, to stop us from blatting\n    // Kana-Kanji conversion\n    if (event.defaultPrevented || event.isComposing) {\n        return;\n    }\n\n    // We need to apply the Backspace/delete handlers regardless of\n    // control key modifiers.\n    let key = event.key;\n    let modifiers = '';\n    const code = event.code;\n    // If pressing a number key + Shift, make sure we handle it as the number\n    // key and not whatever different character the shift might turn it into.\n    if (/^Digit\\d$/.test(code)) {\n        key = code.slice(-1);\n    }\n    if (key !== 'Backspace' && key !== 'Delete') {\n        if (event.altKey) {\n            modifiers += 'Alt-';\n        }\n        if (event.ctrlKey) {\n            modifiers += 'Ctrl-';\n        }\n        if (event.metaKey) {\n            modifiers += 'Meta-';\n        }\n        if (event.shiftKey) {\n            modifiers += 'Shift-';\n        }\n    }\n    // However, on Windows, Shift-Delete is apparently \"cut\" (WTF right?), so\n    // we want to let the browser handle Shift-Delete in this situation.\n    if (isWin && event.shiftKey && key === 'Delete') {\n        modifiers += 'Shift-';\n    }\n    key = modifiers + key;\n\n    const range: Range = this.getSelection();\n    const handler = this._keyHandlers[key];\n    if (handler) {\n        handler(this, event, range);\n    } else if (\n        !range.collapsed &&\n        !event.ctrlKey &&\n        !event.metaKey &&\n        key.length === 1\n    ) {\n        // Record undo checkpoint.\n        this.saveUndoState(range);\n        // Delete the selection\n        deleteContentsOfRange(range, this._root);\n        this._ensureBottomLine();\n        this.setSelection(range);\n        this._updatePath(range, true);\n    }\n};\n\n// ---\n\ntype KeyHandler = (self: Squire, event: KeyboardEvent, range: Range) => void;\n\nconst keyHandlers: Record<string, KeyHandler> = {\n    'Backspace': Backspace,\n    'Delete': Delete,\n    'Tab': Tab,\n    'Shift-Tab': ShiftTab,\n    ' ': Space,\n    'ArrowLeft'(self: Squire): void {\n        self._removeZWS();\n    },\n    'ArrowRight'(self: Squire, event: KeyboardEvent, range: Range): void {\n        self._removeZWS();\n        // Allow right arrow to always break out of <code> block.\n        const root = self.getRoot();\n        if (rangeDoesEndAtBlockBoundary(range, root)) {\n            moveRangeBoundariesDownTree(range);\n            let node: Node | null = range.endContainer;\n            do {\n                if (node.nodeName === 'CODE') {\n                    let next = node.nextSibling;\n                    if (!(next instanceof Text)) {\n                        const textNode = document.createTextNode('\u00A0'); // nbsp\n                        node.parentNode!.insertBefore(textNode, next);\n                        next = textNode;\n                    }\n                    range.setStart(next, 1);\n                    self.setSelection(range);\n                    event.preventDefault();\n                    break;\n                }\n            } while (\n                !node.nextSibling &&\n                (node = node.parentNode) &&\n                node !== root\n            );\n        }\n    },\n};\n\nif (!supportsInputEvents) {\n    keyHandlers.Enter = Enter;\n    keyHandlers['Shift-Enter'] = Enter;\n}\n\n// System standard for page up/down on Mac/iOS is to just scroll, not move the\n// cursor. On Linux/Windows, it should move the cursor, but some browsers don't\n// implement this natively. Override to support it.\nif (!isMac && !isIOS) {\n    keyHandlers.PageUp = (self: Squire) => {\n        self.moveCursorToStart();\n    };\n    keyHandlers.PageDown = (self: Squire) => {\n        self.moveCursorToEnd();\n    };\n}\n\n// ---\n\nconst mapKeyToFormat = (\n    tag: string,\n    remove?: { tag: string } | null,\n): KeyHandler => {\n    remove = remove || null;\n    return (self: Squire, event: Event) => {\n        event.preventDefault();\n        const range = self.getSelection();\n        if (self.hasFormat(tag, null, range)) {\n            self.changeFormat(null, { tag }, range);\n        } else {\n            self.changeFormat({ tag }, remove, range);\n        }\n    };\n};\n\nkeyHandlers[ctrlKey + 'b'] = mapKeyToFormat('B');\nkeyHandlers[ctrlKey + 'i'] = mapKeyToFormat('I');\nkeyHandlers[ctrlKey + 'u'] = mapKeyToFormat('U');\nkeyHandlers[ctrlKey + 'Shift-7'] = mapKeyToFormat('S');\nkeyHandlers[ctrlKey + 'Shift-5'] = mapKeyToFormat('SUB', { tag: 'SUP' });\nkeyHandlers[ctrlKey + 'Shift-6'] = mapKeyToFormat('SUP', { tag: 'SUB' });\n\nkeyHandlers[ctrlKey + 'Shift-8'] = (\n    self: Squire,\n    event: KeyboardEvent,\n): void => {\n    event.preventDefault();\n    const path = self.getPath();\n    if (!/(?:^|>)UL/.test(path)) {\n        self.makeUnorderedList();\n    } else {\n        self.removeList();\n    }\n};\nkeyHandlers[ctrlKey + 'Shift-9'] = (\n    self: Squire,\n    event: KeyboardEvent,\n): void => {\n    event.preventDefault();\n    const path = self.getPath();\n    if (!/(?:^|>)OL/.test(path)) {\n        self.makeOrderedList();\n    } else {\n        self.removeList();\n    }\n};\n\nkeyHandlers[ctrlKey + '['] = (self: Squire, event: KeyboardEvent): void => {\n    event.preventDefault();\n    const path = self.getPath();\n    if (/(?:^|>)BLOCKQUOTE/.test(path) || !/(?:^|>)[OU]L/.test(path)) {\n        self.decreaseQuoteLevel();\n    } else {\n        self.decreaseListLevel();\n    }\n};\nkeyHandlers[ctrlKey + ']'] = (self: Squire, event: KeyboardEvent): void => {\n    event.preventDefault();\n    const path = self.getPath();\n    if (/(?:^|>)BLOCKQUOTE/.test(path) || !/(?:^|>)[OU]L/.test(path)) {\n        self.increaseQuoteLevel();\n    } else {\n        self.increaseListLevel();\n    }\n};\n\nkeyHandlers[ctrlKey + 'd'] = (self: Squire, event: KeyboardEvent): void => {\n    event.preventDefault();\n    self.toggleCode();\n};\n\nkeyHandlers[ctrlKey + 'z'] = (self: Squire, event: KeyboardEvent): void => {\n    event.preventDefault();\n    self.undo();\n};\nkeyHandlers[ctrlKey + 'y'] =\n    // Depending on platform, the Shift may cause the key to come through as\n    // upper case, but sometimes not. Just add both as shortcuts \u2014 the browser\n    // will only ever fire one or the other.\n    keyHandlers[ctrlKey + 'Shift-z'] =\n    keyHandlers[ctrlKey + 'Shift-Z'] =\n        (self: Squire, event: KeyboardEvent): void => {\n            event.preventDefault();\n            self.redo();\n        };\n\nexport { _onKey, keyHandlers };\n", "import { getNextBlock, getPreviousBlock } from './node/Block';\nimport { createElement } from './node/Node';\nimport { getStartBlockOfRange } from './range/Block';\nimport type { Squire } from './Editor';\n\n// ---\n\n// Configuration for image resizing\nconst RESIZE_HANDLE_SIZE = 8;\nconst MIN_IMAGE_SIZE = 40;\nconst MAX_IMAGE_SIZE = 1200;\n\ntype ResizeHandle = {\n    element: HTMLElement;\n    cursor: string;\n    position: 'nw' | 'n' | 'ne' | 'e' | 'se' | 's' | 'sw' | 'w';\n};\n\nconst handlePositions: Array<{\n    pos: ResizeHandle['position'];\n    cursor: string;\n}> = [\n    { pos: 'nw', cursor: 'nwse-resize' },\n    { pos: 'n', cursor: 'ns-resize' },\n    { pos: 'ne', cursor: 'nesw-resize' },\n    { pos: 'e', cursor: 'ew-resize' },\n    { pos: 'se', cursor: 'nwse-resize' },\n    { pos: 's', cursor: 'ns-resize' },\n    { pos: 'sw', cursor: 'nesw-resize' },\n    { pos: 'w', cursor: 'ew-resize' },\n];\n\nconst keyHandlers = {\n    ArrowUp: (editor: Squire, range: Range, root: HTMLElement) => {\n        const block = getStartBlockOfRange(range, root);\n        if (block) {\n            const prev = getPreviousBlock(block, root);\n            if (prev) {\n                range.selectNodeContents(prev);\n                range.collapse(false);\n                editor.setSelection(range).focus();\n            }\n        }\n    },\n    ArrowDown: (editor: Squire, range: Range, root: HTMLElement) => {\n        const block = getStartBlockOfRange(range, root);\n        if (block) {\n            const next = getNextBlock(block, root);\n            if (next) {\n                range.selectNodeContents(next);\n                range.collapse(true);\n                editor.setSelection(range).focus();\n            }\n        }\n    },\n    Delete: (editor: Squire, range: Range /* , root */) => {\n        editor.replaceWithBlankLine(range);\n    },\n    Backspace: (editor: Squire, range: Range /* , root */) => {\n        editor.replaceWithBlankLine(range);\n    },\n};\n\nclass ImageResizer {\n    private _editor: Squire;\n    private _root: HTMLElement;\n    private _currentImage: HTMLImageElement | null = null;\n    private _resizeContainer: HTMLElement | null = null;\n    private _handles: ResizeHandle[] | null = null;\n    private _currentHandle: ResizeHandle | null = null;\n    private _startX = 0;\n    private _startY = 0;\n    private _startWidth = 0;\n    private _startHeight = 0;\n    private _maxWidth = MAX_IMAGE_SIZE;\n    private _originalRatio = 1;\n\n    constructor(root: HTMLElement, editor: Squire) {\n        this._editor = editor;\n        this._root = root;\n\n        // Register this object as the event handler\n        document.addEventListener('click', this);\n        editor.addEventListener('drop', this);\n    }\n\n    destroy(): void {\n        this._deselectImage();\n        this._editor.removeEventListener('drop', this);\n        document.removeEventListener('click', this);\n    }\n\n    // EventListener interface implementation\n    handleEvent(event: Event): void {\n        switch (event.type) {\n            case 'click':\n                this._onClick(event as PointerEvent);\n                break;\n            case 'pointerdown':\n                this._onPointerDown(event as PointerEvent);\n                break;\n            case 'pointermove':\n                this._onPointerMove(event as PointerEvent);\n                break;\n            case 'pointercancel':\n            case 'pointerup':\n                this._onPointerUp(event as PointerEvent);\n                break;\n            case 'keydown':\n                this._onKeyDown(event as KeyboardEvent);\n                break;\n            case 'drop':\n                this._deselectImage();\n                break;\n        }\n    }\n\n    // ---\n\n    private _onClick(event: PointerEvent): void {\n        const target = event.target as HTMLElement;\n        if (target.nodeName === 'IMG' && this._root.contains(target)) {\n            event.stopPropagation();\n            this._selectImage(target as HTMLImageElement);\n        } else if (\n            this._currentImage &&\n            this._handles &&\n            !this._handles.some((handle) => handle.element === target)\n        ) {\n            this._deselectImage();\n        }\n    }\n\n    private _deselectImage(): void {\n        if (!this._currentImage) {\n            return;\n        }\n\n        document.removeEventListener('keydown', this);\n\n        if (this._currentHandle) {\n            this._onPointerUp({\n                preventDefault() {},\n                target: this._currentHandle.element,\n            });\n        }\n        if (this._handles) {\n            this._handles.forEach(({ element }) =>\n                element.removeEventListener('pointerdown', this),\n            );\n        }\n        if (this._resizeContainer) {\n            this._resizeContainer.remove();\n        }\n\n        this._handles = null;\n        this._resizeContainer = null;\n        this._currentImage = null;\n    }\n\n    private _selectImage(image: HTMLImageElement): void {\n        if (this._currentImage === image) {\n            return; // Already selected\n        }\n\n        // Deselect current image if any\n        this._deselectImage();\n\n        this._root.blur();\n\n        const handles = handlePositions.map(({ pos, cursor }) => {\n            const offset = RESIZE_HANDLE_SIZE / 2;\n            let positionStyle = '';\n\n            switch (pos) {\n                case 'nw':\n                    positionStyle = `left: -${offset}px; top: -${offset}px;`;\n                    break;\n                case 'n':\n                    positionStyle = `left: calc(50% - ${offset}px); top: -${offset}px;`;\n                    break;\n                case 'ne':\n                    positionStyle = `right: -${offset}px; top: -${offset}px;`;\n                    break;\n                case 'e':\n                    positionStyle = `right: -${offset}px; top: calc(50% - ${offset}px);`;\n                    break;\n                case 'se':\n                    positionStyle = `right: -${offset}px; bottom: -${offset}px;`;\n                    break;\n                case 's':\n                    positionStyle = `left: calc(50% - ${offset}px); bottom: -${offset}px;`;\n                    break;\n                case 'sw':\n                    positionStyle = `left: -${offset}px; bottom: -${offset}px;`;\n                    break;\n                case 'w':\n                    positionStyle = `left: -${offset}px; top: calc(50% - ${offset}px);`;\n                    break;\n            }\n\n            const handle = createElement('div', {\n                class: `squire-resize-handle squire-resize-handle-${pos}`,\n                style: `\n                    position: absolute;\n                    width: ${RESIZE_HANDLE_SIZE}px;\n                    height: ${RESIZE_HANDLE_SIZE}px;\n                    background: #0067b9;\n                    border: 1px solid #fff;\n                    cursor: ${cursor};\n                    pointer-events: auto;\n                    touch-action: none;\n                    box-shadow: 0 1px 3px rgba(0,0,0,0.3);\n                    ${positionStyle}\n                `,\n            });\n            handle.addEventListener('pointerdown', this);\n            return {\n                element: handle,\n                cursor,\n                position: pos,\n            };\n        });\n        const resizeContainer = createElement(\n            'div',\n            {\n                class: 'squire-image-resize-container',\n                style: 'position: absolute; pointer-events: none; z-index: 1000;',\n            },\n            handles.map((handle) => handle.element),\n        );\n\n        this._currentImage = image;\n        this._resizeContainer = resizeContainer;\n        this._handles = handles;\n        this._root.appendChild(this._resizeContainer);\n\n        const naturalWidth = image.naturalWidth;\n        this._originalRatio = naturalWidth / image.naturalHeight;\n        this._maxWidth = Math.min(\n            naturalWidth * 2,\n            image.parentElement\n                ? image.parentElement.offsetWidth\n                : MAX_IMAGE_SIZE,\n            MAX_IMAGE_SIZE,\n        );\n\n        this._positionResizeContainer();\n        document.addEventListener('keydown', this);\n    }\n\n    private _positionResizeContainer(): void {\n        const resizeContainer = this._resizeContainer;\n        const root = this._root;\n        const currentImage = this._currentImage;\n        if (!resizeContainer || !currentImage) {\n            return;\n        }\n        const rootRect = root.getBoundingClientRect();\n        const imageRect = currentImage.getBoundingClientRect();\n\n        // Position relative to editor\n        const top = imageRect.top - rootRect.top + root.scrollTop;\n        const left = imageRect.left - rootRect.left + root.scrollLeft;\n        const width = imageRect.width;\n        const height = imageRect.height;\n\n        resizeContainer.style.top = top + 'px';\n        resizeContainer.style.left = left + 'px';\n        resizeContainer.style.width = width + 'px';\n        resizeContainer.style.height = height + 'px';\n    }\n\n    private _onPointerDown(event: PointerEvent): void {\n        if (this._currentHandle || !this._handles) {\n            return;\n        }\n        const target = event.target as HTMLElement;\n        const currentHandle =\n            this._handles.find((h) => h.element === target) || null;\n\n        if (!currentHandle) {\n            return;\n        }\n        const currentImage = this._currentImage;\n        if (!currentImage) {\n            return;\n        }\n        event.preventDefault();\n        event.stopPropagation();\n\n        target.addEventListener('pointermove', this);\n        target.addEventListener('pointerup', this);\n        target.addEventListener('pointercancel', this);\n        target.setPointerCapture(event.pointerId);\n        this._currentHandle = currentHandle;\n\n        this._startX = event.clientX;\n        this._startY = event.clientY;\n\n        const style = getComputedStyle(currentImage);\n        this._startWidth = parseFloat(style.width);\n        this._startHeight = parseFloat(style.height);\n\n        document.body.style.cursor = currentHandle.cursor;\n    }\n\n    private _onPointerMove(event: PointerEvent): void {\n        event.preventDefault();\n\n        const currentHandle = this._currentHandle;\n        const currentImage = this._currentImage;\n        if (!currentHandle || !currentImage) {\n            return;\n        }\n\n        const deltaX = event.clientX - this._startX;\n        const deltaY = event.clientY - this._startY;\n\n        const maxWidth = this._maxWidth;\n        const originalRatio = this._originalRatio;\n        let newWidth = this._startWidth;\n        let newHeight = this._startHeight;\n\n        // Calculate new dimensions based on which handle is being dragged\n        switch (currentHandle.position) {\n            case 'sw':\n            case 'nw':\n            case 'w':\n                newWidth -= 2 * deltaX;\n                break;\n            case 'se':\n            case 'ne':\n            case 'e':\n                newWidth += 2 * deltaX;\n                break;\n            case 'n':\n                newHeight -= deltaY;\n                newWidth = newHeight * originalRatio;\n                break;\n            case 's':\n                newHeight += deltaY;\n                newWidth = newHeight * originalRatio;\n                break;\n        }\n\n        // Apply min/max constraints\n        if (newWidth < MIN_IMAGE_SIZE) {\n            newWidth = MIN_IMAGE_SIZE;\n        } else if (newWidth > maxWidth) {\n            newWidth = maxWidth;\n        }\n\n        // Apply the new size\n        const currentImageStyle = currentImage.style;\n        currentImageStyle.width = newWidth + 'px';\n        currentImageStyle.height = 'auto';\n\n        // Update resize container position\n        this._positionResizeContainer();\n    }\n\n    private _onPointerUp(\n        event: PointerEvent | { preventDefault(): void; target: HTMLElement },\n    ): void {\n        event.preventDefault();\n\n        const target = event.target as HTMLElement;\n        if (target) {\n            target.removeEventListener('pointermove', this);\n            target.removeEventListener('pointerup', this);\n            target.removeEventListener('pointercancel', this);\n        }\n\n        this._currentHandle = null;\n\n        document.body.style.cursor = '';\n    }\n\n    private _onKeyDown(event: KeyboardEvent): void {\n        event.preventDefault();\n        event.stopPropagation();\n        const keyHandler = keyHandlers[event.key as keyof typeof keyHandlers];\n        if (!keyHandler) {\n            return;\n        }\n        const image = this._currentImage;\n        if (!image) {\n            return;\n        }\n        const editor = this._editor;\n        const root = this._root;\n        this._deselectImage();\n        const range = editor.getSelection();\n        range.selectNode(image);\n        keyHandler(editor, range, root);\n    }\n}\n\n// ---\n\nexport { ImageResizer };\n", "import {\n    TreeIterator,\n    SHOW_TEXT,\n    SHOW_ELEMENT_OR_TEXT,\n} from './node/TreeIterator';\nimport {\n    createElement,\n    detach,\n    empty,\n    getNearest,\n    hasTagAttributes,\n    replaceWith,\n} from './node/Node';\nimport {\n    isLeaf,\n    isInline,\n    resetNodeCategoryCache,\n    isContainer,\n    isBlock,\n} from './node/Category';\nimport { isLineBreak, removeZWS } from './node/Whitespace';\nimport {\n    moveRangeBoundariesDownTree,\n    isNodeContainedInRange,\n    moveRangeBoundaryOutOf,\n    moveRangeBoundariesUpTree,\n} from './range/Boundaries';\nimport {\n    createRange,\n    deleteContentsOfRange,\n    extractContentsOfRange,\n    insertNodeInRange,\n    insertTreeFragmentIntoRange,\n} from './range/InsertDelete';\nimport {\n    fixContainer,\n    fixCursor,\n    mergeContainers,\n    mergeInlines,\n    split,\n} from './node/MergeSplit';\nimport { getBlockWalker, getNextBlock, isEmptyBlock } from './node/Block';\nimport { cleanTree, cleanupBRs, escapeHTML, removeEmptyInlines } from './Clean';\nimport { cantFocusEmptyTextNodes, ZWS } from './Constants';\nimport {\n    expandRangeToBlockBoundaries,\n    getEndBlockOfRange,\n    getStartBlockOfRange,\n    rangeDoesEndAtBlockBoundary,\n    rangeDoesStartAtBlockBoundary,\n} from './range/Block';\nimport {\n    _monitorShiftKey,\n    _onCopy,\n    _onCut,\n    _onDrop,\n    _onPaste,\n} from './Clipboard';\nimport { keyHandlers, _onKey } from './keyboard/KeyHandlers';\nimport { linkifyText } from './keyboard/KeyHelpers';\nimport { getTextContentsOfRange } from './range/Contents';\nimport { ImageResizer } from './ImageResize';\n\ndeclare const DOMPurify: any;\n\n// ---\n\ntype EventHandler = { handleEvent: (e: Event) => void } | ((e: Event) => void);\n\ntype KeyHandlerFunction = (x: Squire, y: KeyboardEvent, z: Range) => void;\n\ntype TagAttributes = {\n    [key: string]: { [key: string]: string };\n};\n\ninterface SquireConfig {\n    blockTag: string;\n    blockAttributes: null | Record<string, string>;\n    tagAttributes: TagAttributes;\n    classNames: {\n        color: string;\n        fontFamily: string;\n        fontSize: string;\n        highlight: string;\n    };\n    undo: {\n        documentSizeThreshold: number;\n        undoLimit: number;\n    };\n    addLinks: boolean;\n    willCutCopy: null | ((html: string) => string);\n    toPlainText: null | ((html: string) => string);\n    sanitizeToDOMFragment: (html: string, editor: Squire) => DocumentFragment;\n    didError: (x: any) => void;\n}\n\n// ---\n\nclass Squire {\n    _root: HTMLElement;\n    _config: SquireConfig;\n\n    _isFocused: boolean;\n    _lastSelection: Range;\n    _willRestoreSelection: boolean;\n    _mayHaveZWS: boolean;\n\n    _lastAnchorNode: Node | null;\n    _lastFocusNode: Node | null;\n    _path: string;\n\n    _events: Map<string, Array<EventHandler>>;\n\n    _undoIndex: number;\n    _undoStack: Array<string>;\n    _undoStackLength: number;\n    _isInUndoState: boolean;\n    _ignoreChange: boolean;\n    _ignoreAllChanges: boolean;\n\n    _isShiftDown: boolean;\n    _keyHandlers: Record<string, KeyHandlerFunction | null>;\n\n    _mutation: MutationObserver;\n    _imageResizer: ImageResizer;\n\n    constructor(root: HTMLElement, config?: Partial<SquireConfig>) {\n        this._root = root;\n\n        this._config = this._makeConfig(config);\n\n        this._isFocused = false;\n        this._lastSelection = createRange(root, 0);\n        this._willRestoreSelection = false;\n        this._mayHaveZWS = false;\n\n        this._lastAnchorNode = null;\n        this._lastFocusNode = null;\n        this._path = '';\n\n        this._events = new Map();\n\n        this._undoIndex = -1;\n        this._undoStack = [];\n        this._undoStackLength = 0;\n        this._isInUndoState = false;\n        this._ignoreChange = false;\n        this._ignoreAllChanges = false;\n\n        // Add event listeners\n        this.addEventListener('selectionchange', this._updatePathOnEvent);\n\n        // On blur, restore focus except if the user taps or clicks to focus a\n        // specific point. Can't actually use click event because focus happens\n        // before click, so use mousedown/touchstart\n        this.addEventListener('blur', this._enableRestoreSelection);\n        this.addEventListener('mousedown', this._disableRestoreSelection);\n        this.addEventListener('touchstart', this._disableRestoreSelection);\n        this.addEventListener('focus', this._restoreSelection);\n\n        // On blur, cleanup any ZWS/empty inlines\n        this.addEventListener('blur', this._removeZWS);\n\n        // Clipboard support\n        this._isShiftDown = false;\n        this.addEventListener('cut', _onCut as (e: Event) => void);\n        this.addEventListener('copy', _onCopy as (e: Event) => void);\n        this.addEventListener('paste', _onPaste as (e: Event) => void);\n        this.addEventListener('drop', _onDrop as (e: Event) => void);\n        this.addEventListener(\n            'keydown',\n            _monitorShiftKey as (e: Event) => void,\n        );\n        this.addEventListener('keyup', _monitorShiftKey as (e: Event) => void);\n\n        // Keyboard support\n        this.addEventListener('keydown', _onKey as (e: Event) => void);\n        this._keyHandlers = Object.create(keyHandlers);\n\n        const mutation = new MutationObserver(() => this._docWasChanged());\n        mutation.observe(root, {\n            childList: true,\n            attributes: true,\n            characterData: true,\n            subtree: true,\n        });\n        this._mutation = mutation;\n\n        // Make it editable\n        root.setAttribute('contenteditable', 'true');\n\n        // Modern browsers let you override their default content editable\n        // handling!\n        this.addEventListener(\n            'beforeinput',\n            this._beforeInput as (e: Event) => void,\n        );\n\n        // Initialize image resizer\n        this._imageResizer = new ImageResizer(root, this);\n\n        this.setHTML('');\n    }\n\n    destroy(): void {\n        this._events.forEach((_, type) => {\n            this.removeEventListener(type);\n        });\n\n        this._mutation.disconnect();\n\n        // Cleanup image resizer\n        this._imageResizer.destroy();\n\n        this._undoIndex = -1;\n        this._undoStack = [];\n        this._undoStackLength = 0;\n    }\n\n    _makeConfig(userConfig?: object): SquireConfig {\n        const config = {\n            blockTag: 'DIV',\n            blockAttributes: null,\n            tagAttributes: {},\n            classNames: {\n                color: 'color',\n                fontFamily: 'font',\n                fontSize: 'size',\n                highlight: 'highlight',\n            },\n            undo: {\n                documentSizeThreshold: -1, // -1 means no threshold\n                undoLimit: -1, // -1 means no limit\n            },\n            addLinks: true,\n            willCutCopy: null,\n            toPlainText: null,\n            sanitizeToDOMFragment: (\n                html: string,\n                /* editor: Squire, */\n            ): DocumentFragment => {\n                const frag = DOMPurify.sanitize(html, {\n                    ALLOW_UNKNOWN_PROTOCOLS: true,\n                    WHOLE_DOCUMENT: false,\n                    RETURN_DOM: true,\n                    RETURN_DOM_FRAGMENT: true,\n                    FORCE_BODY: false,\n                });\n                return frag\n                    ? document.importNode(frag, true)\n                    : document.createDocumentFragment();\n            },\n            didError: (error: any): void => console.log(error),\n        };\n        if (userConfig) {\n            Object.assign(config, userConfig);\n            config.blockTag = config.blockTag.toUpperCase();\n        }\n\n        return config;\n    }\n\n    setKeyHandler(key: string, fn: KeyHandlerFunction | null) {\n        this._keyHandlers[key] = fn;\n        return this;\n    }\n\n    _beforeInput(event: InputEvent): void {\n        switch (event.inputType) {\n            case 'insertLineBreak':\n                event.preventDefault();\n                this.splitBlock(true);\n                break;\n            case 'insertParagraph':\n                event.preventDefault();\n                this.splitBlock(false);\n                break;\n            case 'insertOrderedList':\n                event.preventDefault();\n                this.makeOrderedList();\n                break;\n            case 'insertUnoderedList':\n                event.preventDefault();\n                this.makeUnorderedList();\n                break;\n            case 'historyUndo':\n                event.preventDefault();\n                this.undo();\n                break;\n            case 'historyRedo':\n                event.preventDefault();\n                this.redo();\n                break;\n            case 'formatBold':\n                event.preventDefault();\n                this.bold();\n                break;\n            case 'formatItalic':\n                event.preventDefault();\n                this.italic();\n                break;\n            case 'formatUnderline':\n                event.preventDefault();\n                this.underline();\n                break;\n            case 'formatStrikeThrough':\n                event.preventDefault();\n                this.strikethrough();\n                break;\n            case 'formatSuperscript':\n                event.preventDefault();\n                this.superscript();\n                break;\n            case 'formatSubscript':\n                event.preventDefault();\n                this.subscript();\n                break;\n            case 'formatJustifyFull':\n            case 'formatJustifyCenter':\n            case 'formatJustifyRight':\n            case 'formatJustifyLeft': {\n                event.preventDefault();\n                let alignment = event.inputType.slice(13).toLowerCase();\n                if (alignment === 'full') {\n                    alignment = 'justify';\n                }\n                this.setTextAlignment(alignment);\n                break;\n            }\n            case 'formatRemove':\n                event.preventDefault();\n                this.removeAllFormatting();\n                break;\n            case 'formatSetBlockTextDirection': {\n                event.preventDefault();\n                let dir = event.data;\n                if (dir === 'null') {\n                    dir = null;\n                }\n                this.setTextDirection(dir);\n                break;\n            }\n            case 'formatBackColor':\n                event.preventDefault();\n                this.setHighlightColor(event.data);\n                break;\n            case 'formatFontColor':\n                event.preventDefault();\n                this.setTextColor(event.data);\n                break;\n            case 'formatFontName':\n                event.preventDefault();\n                this.setFontFace(event.data);\n                break;\n        }\n    }\n\n    // --- Events\n\n    handleEvent(event: Event): void {\n        this.fireEvent(event.type, event);\n    }\n\n    fireEvent(type: string, detail?: Event | object): Squire {\n        let handlers = this._events.get(type);\n        // UI code, especially modal views, may be monitoring for focus events\n        // and immediately removing focus. In certain conditions, this can\n        // cause the focus event to fire after the blur event, which can cause\n        // an infinite loop. So we detect whether we're actually\n        // focused/blurred before firing.\n        if (/^(?:focus|blur)/.test(type)) {\n            const isFocused = this._root === document.activeElement;\n            if (type === 'focus') {\n                if (!isFocused || this._isFocused) {\n                    return this;\n                }\n                this._isFocused = true;\n            } else {\n                if (isFocused || !this._isFocused) {\n                    return this;\n                }\n                this._isFocused = false;\n            }\n        }\n        if (handlers) {\n            const event: Event =\n                detail instanceof Event\n                    ? detail\n                    : new CustomEvent(type, {\n                          detail,\n                      });\n            // Clone handlers array, so any handlers added/removed do not\n            // affect it.\n            handlers = handlers.slice();\n            for (const handler of handlers) {\n                try {\n                    if ('handleEvent' in handler) {\n                        handler.handleEvent(event);\n                    } else {\n                        handler.call(this, event);\n                    }\n                } catch (error) {\n                    this._config.didError(error);\n                }\n            }\n        }\n        return this;\n    }\n\n    /**\n     * Subscribing to these events won't automatically add a listener to the\n     * document node, since these events are fired in a custom manner by the\n     * editor code.\n     */\n    customEvents = new Set([\n        'pathChange',\n        'select',\n        'input',\n        'pasteImage',\n        'undoStateChange',\n    ]);\n\n    addEventListener(type: string, fn: EventHandler): Squire {\n        let handlers = this._events.get(type);\n        let target: Document | HTMLElement = this._root;\n        if (!handlers) {\n            handlers = [];\n            this._events.set(type, handlers);\n            if (!this.customEvents.has(type)) {\n                if (type === 'selectionchange') {\n                    target = document;\n                }\n                target.addEventListener(type, this, true);\n            }\n        }\n        handlers.push(fn);\n        return this;\n    }\n\n    removeEventListener(type: string, fn?: EventHandler): Squire {\n        const handlers = this._events.get(type);\n        let target: Document | HTMLElement = this._root;\n        if (handlers) {\n            if (fn) {\n                let l = handlers.length;\n                while (l--) {\n                    if (handlers[l] === fn) {\n                        handlers.splice(l, 1);\n                    }\n                }\n            } else {\n                handlers.length = 0;\n            }\n            if (!handlers.length) {\n                this._events.delete(type);\n                if (!this.customEvents.has(type)) {\n                    if (type === 'selectionchange') {\n                        target = document;\n                    }\n                    target.removeEventListener(type, this, true);\n                }\n            }\n        }\n        return this;\n    }\n\n    // --- Focus\n\n    focus(): Squire {\n        this._root.focus({ preventScroll: true });\n        return this;\n    }\n\n    blur(): Squire {\n        this._root.blur();\n        return this;\n    }\n\n    // --- Selection and bookmarking\n\n    _enableRestoreSelection(): void {\n        this._willRestoreSelection = true;\n    }\n\n    _disableRestoreSelection(): void {\n        this._willRestoreSelection = false;\n    }\n\n    _restoreSelection() {\n        if (this._willRestoreSelection) {\n            this.setSelection(this._lastSelection);\n        }\n    }\n\n    // ---\n\n    _removeZWS(): void {\n        if (!this._mayHaveZWS) {\n            return;\n        }\n        removeZWS(this._root);\n        this._mayHaveZWS = false;\n    }\n\n    // ---\n\n    startSelectionId = 'squire-selection-start';\n    endSelectionId = 'squire-selection-end';\n\n    _saveRangeToBookmark(range: Range): void {\n        let startNode = createElement('INPUT', {\n            id: this.startSelectionId,\n            type: 'hidden',\n        });\n        let endNode = createElement('INPUT', {\n            id: this.endSelectionId,\n            type: 'hidden',\n        });\n        let temp: HTMLElement;\n\n        insertNodeInRange(range, startNode);\n        range.collapse(false);\n        insertNodeInRange(range, endNode);\n\n        // In a collapsed range, the start is sometimes inserted after the end!\n        if (\n            startNode.compareDocumentPosition(endNode) &\n            Node.DOCUMENT_POSITION_PRECEDING\n        ) {\n            startNode.id = this.endSelectionId;\n            endNode.id = this.startSelectionId;\n            temp = startNode;\n            startNode = endNode;\n            endNode = temp;\n        }\n\n        range.setStartAfter(startNode);\n        range.setEndBefore(endNode);\n    }\n\n    _getRangeAndRemoveBookmark(range?: Range): Range | null {\n        const root = this._root;\n        const start = root.querySelector('#' + this.startSelectionId);\n        const end = root.querySelector('#' + this.endSelectionId);\n\n        if (start && end) {\n            let startContainer: Node = start.parentNode!;\n            let endContainer: Node = end.parentNode!;\n            const startOffset = Array.from(startContainer.childNodes).indexOf(\n                start,\n            );\n            let endOffset = Array.from(endContainer.childNodes).indexOf(end);\n\n            if (startContainer === endContainer) {\n                endOffset -= 1;\n            }\n\n            start.remove();\n            end.remove();\n\n            if (!range) {\n                range = document.createRange();\n            }\n            range.setStart(startContainer, startOffset);\n            range.setEnd(endContainer, endOffset);\n\n            // Merge any text nodes we split\n            mergeInlines(startContainer, range);\n            if (startContainer !== endContainer) {\n                mergeInlines(endContainer, range);\n            }\n\n            // If we didn't split a text node, we should move into any adjacent\n            // text node to current selection point\n            if (range.collapsed) {\n                startContainer = range.startContainer;\n                if (startContainer instanceof Text) {\n                    endContainer = startContainer.childNodes[range.startOffset];\n                    if (!endContainer || !(endContainer instanceof Text)) {\n                        endContainer =\n                            startContainer.childNodes[range.startOffset - 1];\n                    }\n                    if (endContainer && endContainer instanceof Text) {\n                        range.setStart(endContainer, 0);\n                        range.collapse(true);\n                    }\n                }\n            }\n        }\n        return range || null;\n    }\n\n    getSelection(): Range {\n        const selection = window.getSelection();\n        const root = this._root;\n        let range: Range | null = null;\n        // If not focused, always rely on cached selection; another function may\n        // have set it but the DOM is not modified until focus again\n        if (this._isFocused && selection && selection.rangeCount) {\n            range = selection.getRangeAt(0).cloneRange();\n            const startContainer = range.startContainer;\n            const endContainer = range.endContainer;\n            // FF can return the selection as being inside an <img>. WTF?\n            if (startContainer && isLeaf(startContainer)) {\n                range.setStartBefore(startContainer);\n            }\n            if (endContainer && isLeaf(endContainer)) {\n                range.setEndBefore(endContainer);\n            }\n        }\n        if (range && root.contains(range.commonAncestorContainer)) {\n            this._lastSelection = range;\n        } else {\n            range = this._lastSelection;\n            // Check the editor is in the live document; if not, the range has\n            // probably been rewritten by the browser and is bogus\n            if (!document.contains(range.commonAncestorContainer)) {\n                range = null;\n            }\n        }\n        if (!range) {\n            range = createRange(root.firstElementChild || root, 0);\n        }\n        return range;\n    }\n\n    setSelection(range: Range): Squire {\n        this._lastSelection = range;\n        // If we're setting selection, that automatically, and synchronously,\n        // triggers a focus event. So just store the selection and mark it as\n        // needing restore on focus.\n        if (!this._isFocused) {\n            this._enableRestoreSelection();\n        } else {\n            const selection = window.getSelection();\n            if (selection) {\n                if ('setBaseAndExtent' in Selection.prototype) {\n                    selection.setBaseAndExtent(\n                        range.startContainer,\n                        range.startOffset,\n                        range.endContainer,\n                        range.endOffset,\n                    );\n                } else {\n                    selection.removeAllRanges();\n                    selection.addRange(range);\n                }\n            }\n        }\n        return this;\n    }\n\n    // ---\n\n    _moveCursorTo(toStart: boolean): Squire {\n        const root = this._root;\n        const range = createRange(root, toStart ? 0 : root.childNodes.length);\n        moveRangeBoundariesDownTree(range);\n        this.setSelection(range);\n        return this;\n    }\n\n    moveCursorToStart(): Squire {\n        return this._moveCursorTo(true);\n    }\n\n    moveCursorToEnd(): Squire {\n        return this._moveCursorTo(false);\n    }\n\n    // ---\n\n    getCursorPosition(): DOMRect {\n        const range = this.getSelection();\n        let rect = range.getBoundingClientRect();\n        // If the range is outside of the viewport, some browsers at least\n        // will return 0 for all the values; need to get a DOM node to find\n        // the position instead.\n        if (rect && !rect.top) {\n            this._ignoreChange = true;\n            const node = createElement('SPAN');\n            node.textContent = ZWS;\n            insertNodeInRange(range, node);\n            rect = node.getBoundingClientRect();\n            const parent = node.parentNode!;\n            parent.removeChild(node);\n            mergeInlines(parent, range);\n        }\n        return rect;\n    }\n\n    // --- Path\n\n    getPath(): string {\n        return this._path;\n    }\n\n    _updatePathOnEvent(): void {\n        if (this._isFocused) {\n            this._updatePath(this.getSelection());\n        }\n    }\n\n    _updatePath(range: Range, force?: boolean): void {\n        const anchor = range.startContainer;\n        const focus = range.endContainer;\n        let newPath: string;\n        if (\n            force ||\n            anchor !== this._lastAnchorNode ||\n            focus !== this._lastFocusNode\n        ) {\n            this._lastAnchorNode = anchor;\n            this._lastFocusNode = focus;\n            newPath =\n                anchor && focus\n                    ? anchor === focus\n                        ? this._getPath(focus)\n                        : '(selection)'\n                    : '';\n            if (this._path !== newPath || anchor !== focus) {\n                this._path = newPath;\n                this.fireEvent('pathChange', {\n                    path: newPath,\n                });\n            }\n        }\n        this.fireEvent(range.collapsed ? 'cursor' : 'select', {\n            range: range,\n        });\n    }\n\n    _getPath(node: Node) {\n        const root = this._root;\n        const config = this._config;\n        let path = '';\n        if (node && node !== root) {\n            const parent = node.parentNode;\n            path = parent ? this._getPath(parent) : '';\n            if (node instanceof HTMLElement) {\n                const id = node.id;\n                const classList = node.classList;\n                const classNames = Array.from(classList).sort();\n                const dir = node.dir;\n                const styleNames = config.classNames;\n                path += (path ? '>' : '') + node.nodeName;\n                if (id) {\n                    path += '#' + id;\n                }\n                if (classNames.length) {\n                    path += '.';\n                    path += classNames.join('.');\n                }\n                if (dir) {\n                    path += '[dir=' + dir + ']';\n                }\n                if (classList.contains(styleNames.highlight)) {\n                    path +=\n                        '[backgroundColor=' +\n                        node.style.backgroundColor.replace(/ /g, '') +\n                        ']';\n                }\n                if (classList.contains(styleNames.color)) {\n                    path +=\n                        '[color=' + node.style.color.replace(/ /g, '') + ']';\n                }\n                if (classList.contains(styleNames.fontFamily)) {\n                    path +=\n                        '[fontFamily=' +\n                        node.style.fontFamily.replace(/ /g, '') +\n                        ']';\n                }\n                if (classList.contains(styleNames.fontSize)) {\n                    path += '[fontSize=' + node.style.fontSize + ']';\n                }\n            }\n        }\n        return path;\n    }\n\n    // --- History\n\n    modifyDocument(modificationFn: () => void): Squire {\n        const mutation = this._mutation;\n        if (mutation) {\n            if (mutation.takeRecords().length) {\n                this._docWasChanged();\n            }\n            mutation.disconnect();\n        }\n\n        this._ignoreAllChanges = true;\n        modificationFn();\n        this._ignoreAllChanges = false;\n\n        if (mutation) {\n            mutation.observe(this._root, {\n                childList: true,\n                attributes: true,\n                characterData: true,\n                subtree: true,\n            });\n            this._ignoreChange = false;\n        }\n\n        return this;\n    }\n\n    _docWasChanged(): void {\n        resetNodeCategoryCache();\n        this._mayHaveZWS = true;\n        if (this._ignoreAllChanges) {\n            return;\n        }\n\n        if (this._ignoreChange) {\n            this._ignoreChange = false;\n            return;\n        }\n        if (this._isInUndoState) {\n            this._isInUndoState = false;\n            this.fireEvent('undoStateChange', {\n                canUndo: true,\n                canRedo: false,\n            });\n        }\n        this.fireEvent('input');\n    }\n\n    /**\n     * Leaves bookmark.\n     */\n    _recordUndoState(range: Range, replace?: boolean): Squire {\n        const isInUndoState = this._isInUndoState;\n        if (!isInUndoState || replace) {\n            // Advance pointer to new position\n            let undoIndex = this._undoIndex + 1;\n            const undoStack = this._undoStack;\n            const undoConfig = this._config.undo;\n            const undoThreshold = undoConfig.documentSizeThreshold;\n            const undoLimit = undoConfig.undoLimit;\n\n            // Truncate stack if longer (i.e. if has been previously undone)\n            if (undoIndex < this._undoStackLength) {\n                undoStack.length = this._undoStackLength = undoIndex;\n            }\n\n            // Add bookmark\n            if (range) {\n                this._saveRangeToBookmark(range);\n            }\n\n            // Don't record if we're already in an undo state\n            if (isInUndoState) {\n                return this;\n            }\n\n            // Get data\n            const html = this._getRawHTML();\n\n            // If this document is above the configured size threshold,\n            // limit the number of saved undo states.\n            // Threshold is in bytes, JS uses 2 bytes per character\n            if (replace) {\n                undoIndex -= 1;\n            }\n            if (undoThreshold > -1 && html.length * 2 > undoThreshold) {\n                if (undoLimit > -1 && undoIndex > undoLimit) {\n                    undoStack.splice(0, undoIndex - undoLimit);\n                    undoIndex = undoLimit;\n                    this._undoStackLength = undoLimit;\n                }\n            }\n\n            // Save data\n            undoStack[undoIndex] = html;\n            this._undoIndex = undoIndex;\n            this._undoStackLength += 1;\n            this._isInUndoState = true;\n        }\n        return this;\n    }\n\n    saveUndoState(range?: Range): Squire {\n        let rangeIsFromSelection = false;\n        if (!range) {\n            range = this.getSelection();\n            rangeIsFromSelection = true;\n        }\n        this._recordUndoState(range, this._isInUndoState);\n        this._getRangeAndRemoveBookmark(range);\n        if (rangeIsFromSelection) {\n            this.setSelection(range);\n        }\n        return this;\n    }\n\n    undo(): Squire {\n        // Sanity check: must not be at beginning of the history stack\n        if (this._undoIndex !== 0 || !this._isInUndoState) {\n            // Make sure any changes since last checkpoint are saved.\n            this._recordUndoState(this.getSelection(), false);\n            this._undoIndex -= 1;\n            this._setRawHTML(this._undoStack[this._undoIndex]);\n            const range = this._getRangeAndRemoveBookmark();\n            if (range) {\n                this.setSelection(range);\n            }\n            this._isInUndoState = true;\n            this.fireEvent('undoStateChange', {\n                canUndo: this._undoIndex !== 0,\n                canRedo: true,\n            });\n            this.fireEvent('input');\n        }\n        return this.focus();\n    }\n\n    redo(): Squire {\n        // Sanity check: must not be at end of stack and must be in an undo\n        // state.\n        const undoIndex = this._undoIndex;\n        const undoStackLength = this._undoStackLength;\n        if (undoIndex + 1 < undoStackLength && this._isInUndoState) {\n            this._undoIndex += 1;\n            this._setRawHTML(this._undoStack[this._undoIndex]);\n            const range = this._getRangeAndRemoveBookmark();\n            if (range) {\n                this.setSelection(range);\n            }\n            this.fireEvent('undoStateChange', {\n                canUndo: true,\n                canRedo: undoIndex + 2 < undoStackLength,\n            });\n            this.fireEvent('input');\n        }\n        return this.focus();\n    }\n\n    // --- Get and set data\n\n    getRoot(): HTMLElement {\n        return this._root;\n    }\n\n    _getRawHTML(): string {\n        return this._root.innerHTML;\n    }\n\n    _setRawHTML(html: string): Squire {\n        const root = this._root;\n        root.innerHTML = html;\n\n        let node: Element | null = root;\n        const child = node.firstChild;\n        if (!child || child.nodeName === 'BR') {\n            const block = this.createDefaultBlock();\n            if (child) {\n                node.replaceChild(block, child);\n            } else {\n                node.appendChild(block);\n            }\n        } else {\n            while ((node = getNextBlock(node, root))) {\n                fixCursor(node);\n            }\n        }\n\n        this._ignoreChange = true;\n\n        return this;\n    }\n\n    getHTML(withBookmark?: boolean): string {\n        let range: Range | undefined;\n        let html = '';\n        // Avoid triggering an \"input\" event from the DOM modifications when\n        // we get the HTML\n        this.modifyDocument(() => {\n            if (withBookmark) {\n                range = this.getSelection();\n                this._saveRangeToBookmark(range);\n            }\n            const resizeContainer = this._root.querySelector(\n                '.squire-image-resize-container',\n            );\n            if (resizeContainer) {\n                resizeContainer.remove();\n            }\n            html = this._getRawHTML().replace(/\\u200B/g, '');\n            if (resizeContainer) {\n                this._root.appendChild(resizeContainer);\n            }\n            if (withBookmark) {\n                this._getRangeAndRemoveBookmark(range);\n            }\n        });\n        return html;\n    }\n\n    setHTML(html: string): Squire {\n        // Parse HTML into DOM tree\n        const frag = this._config.sanitizeToDOMFragment(html, this);\n        const root = this._root;\n\n        // Fixup DOM tree\n        cleanTree(frag, this._config);\n        cleanupBRs(frag, root, false);\n        fixContainer(frag, root);\n\n        // Fix cursor\n        let node: DocumentFragment | HTMLElement | null = frag;\n        let child = node.firstChild;\n        if (!child || child.nodeName === 'BR') {\n            const block = this.createDefaultBlock();\n            if (child) {\n                node.replaceChild(block, child);\n            } else {\n                node.appendChild(block);\n            }\n        } else {\n            while ((node = getNextBlock(node, root))) {\n                fixCursor(node);\n            }\n        }\n\n        // Don't fire an input event\n        this._ignoreChange = true;\n\n        // Remove existing root children and insert new content\n        while ((child = root.lastChild)) {\n            root.removeChild(child);\n        }\n        root.appendChild(frag);\n\n        // Reset the undo stack\n        this._undoIndex = -1;\n        this._undoStack.length = 0;\n        this._undoStackLength = 0;\n        this._isInUndoState = false;\n\n        // Record undo state\n        const range =\n            this._getRangeAndRemoveBookmark() ||\n            createRange(root.firstElementChild || root, 0);\n        this.saveUndoState(range);\n\n        // Set inital selection\n        this.setSelection(range);\n        this._updatePath(range, true);\n\n        return this;\n    }\n\n    /**\n     * Insert HTML at the cursor location. If the selection is not collapsed\n     * insertTreeFragmentIntoRange will delete the selection so that it is\n     * replaced by the html being inserted.\n     */\n    insertHTML(html: string, isPaste?: boolean): Squire {\n        // Parse\n        const config = this._config;\n        let frag = config.sanitizeToDOMFragment(html, this);\n\n        // Record undo checkpoint\n        const range = this.getSelection();\n        this.saveUndoState(range);\n\n        try {\n            const root = this._root;\n\n            if (config.addLinks) {\n                this.addDetectedLinks(frag, frag);\n            }\n            cleanTree(frag, this._config);\n            cleanupBRs(frag, root, false);\n            removeEmptyInlines(frag);\n            frag.normalize();\n\n            let node: HTMLElement | DocumentFragment | null = frag;\n            while ((node = getNextBlock(node, frag))) {\n                fixCursor(node);\n            }\n\n            let doInsert = true;\n            if (isPaste) {\n                const event = new CustomEvent('willPaste', {\n                    cancelable: true,\n                    detail: {\n                        html,\n                        fragment: frag,\n                    },\n                });\n                this.fireEvent('willPaste', event);\n                frag = event.detail.fragment;\n                doInsert = !event.defaultPrevented;\n            }\n\n            if (doInsert) {\n                insertTreeFragmentIntoRange(range, frag, root);\n                range.collapse(false);\n\n                // After inserting the fragment, check whether the cursor is\n                // inside an <a> element and if so if there is an equivalent\n                // cursor position after the <a> element. If there is, move it\n                // there.\n                moveRangeBoundaryOutOf(range, 'A', root);\n\n                this._ensureBottomLine();\n            }\n\n            this.setSelection(range);\n            this._updatePath(range, true);\n            // Safari sometimes loses focus after paste. Weird.\n            if (isPaste) {\n                this.focus();\n            }\n        } catch (error) {\n            this._config.didError(error);\n        }\n        return this;\n    }\n\n    insertElement(el: Element, range?: Range): Squire {\n        if (!range) {\n            range = this.getSelection();\n        }\n        range.collapse(true);\n        if (isInline(el)) {\n            insertNodeInRange(range, el);\n            range.setStartAfter(el);\n        } else {\n            // Get containing block node.\n            const root = this._root;\n            const startNode: HTMLElement | null = getStartBlockOfRange(\n                range,\n                root,\n            );\n            let splitNode: Element | Node = startNode || root;\n\n            let nodeAfterSplit: Node | null = null;\n            // While at end of container node, move up DOM tree.\n            while (splitNode !== root && !splitNode.nextSibling) {\n                splitNode = splitNode.parentNode!;\n            }\n            // If in the middle of a container node, split up to root.\n            if (splitNode !== root) {\n                const parent = splitNode.parentNode!;\n                nodeAfterSplit = split(\n                    parent,\n                    splitNode.nextSibling,\n                    root,\n                    root,\n                ) as Node;\n            }\n\n            // If the startNode was empty remove it so that we don't end up\n            // with two blank lines.\n            if (startNode && isEmptyBlock(startNode)) {\n                detach(startNode);\n            }\n\n            // Insert element and blank line.\n            root.insertBefore(el, nodeAfterSplit);\n            const blankLine = this.createDefaultBlock();\n            root.insertBefore(blankLine, nodeAfterSplit);\n\n            // Move cursor to blank line after inserted element.\n            range.setStart(blankLine, 0);\n            range.setEnd(blankLine, 0);\n            moveRangeBoundariesDownTree(range);\n        }\n        this.focus();\n        this.setSelection(range);\n        this._updatePath(range);\n\n        return this;\n    }\n\n    insertImage(\n        src: string,\n        attributes: Record<string, string>,\n    ): HTMLImageElement {\n        const img = createElement(\n            'IMG',\n            Object.assign(\n                {\n                    src: src,\n                },\n                attributes,\n            ),\n        ) as HTMLImageElement;\n        this.insertElement(img);\n        return img;\n    }\n\n    insertPlainText(plainText: string, isPaste: boolean): Squire {\n        const range = this.getSelection();\n        if (\n            range.collapsed &&\n            getNearest(range.startContainer, this._root, 'PRE')\n        ) {\n            const startContainer: Node = range.startContainer;\n            let offset = range.startOffset;\n            let textNode: Text;\n            if (!startContainer || !(startContainer instanceof Text)) {\n                const text = document.createTextNode('');\n                startContainer.insertBefore(\n                    text,\n                    startContainer.childNodes[offset],\n                );\n                textNode = text;\n                offset = 0;\n            } else {\n                textNode = startContainer;\n            }\n            let doInsert = true;\n            if (isPaste) {\n                const event = new CustomEvent('willPaste', {\n                    cancelable: true,\n                    detail: {\n                        text: plainText,\n                    },\n                });\n                this.fireEvent('willPaste', event);\n                plainText = event.detail.text;\n                doInsert = !event.defaultPrevented;\n            }\n\n            if (doInsert) {\n                textNode.insertData(offset, plainText);\n                range.setStart(textNode, offset + plainText.length);\n                range.collapse(true);\n            }\n            this.setSelection(range);\n            return this;\n        }\n        const lines = plainText.split('\\n');\n        const config = this._config;\n        const tag = config.blockTag;\n        const attributes = config.blockAttributes;\n        const closeBlock = '</' + tag + '>';\n        let openBlock = '<' + tag;\n\n        for (const attr in attributes) {\n            openBlock += ' ' + attr + '=\"' + escapeHTML(attributes[attr]) + '\"';\n        }\n        openBlock += '>';\n\n        for (let i = 0, l = lines.length; i < l; i += 1) {\n            let line = lines[i];\n            line = escapeHTML(line).replace(/ (?=(?: |$))/g, '&nbsp;');\n            // We don't wrap the first line in the block, so if it gets inserted\n            // into a blank line it keeps that line's formatting.\n            // Wrap each line in <div></div>\n            if (i) {\n                line = openBlock + (line || '<BR>') + closeBlock;\n            }\n            lines[i] = line;\n        }\n        return this.insertHTML(lines.join(''), isPaste);\n    }\n\n    getSelectedText(range?: Range): string {\n        return getTextContentsOfRange(range || this.getSelection());\n    }\n\n    // --- Inline formatting\n\n    /**\n     * Extracts the font-family and font-size (if any) of the element\n     * holding the cursor. If there's a selection, returns an empty object.\n     */\n    getFontInfo(range?: Range): Record<string, string | undefined> {\n        const fontInfo = {\n            color: undefined,\n            backgroundColor: undefined,\n            fontFamily: undefined,\n            fontSize: undefined,\n        } as Record<string, string | undefined>;\n\n        if (!range) {\n            range = this.getSelection();\n        }\n        moveRangeBoundariesDownTree(range);\n\n        let seenAttributes = 0;\n        let element: Node | null = range.commonAncestorContainer;\n        if (range.collapsed || element instanceof Text) {\n            if (element instanceof Text) {\n                element = element.parentNode!;\n            }\n            while (seenAttributes < 4 && element) {\n                const style = (element as HTMLElement).style;\n                if (style) {\n                    const color = style.color;\n                    if (!fontInfo.color && color) {\n                        fontInfo.color = color;\n                        seenAttributes += 1;\n                    }\n                    const backgroundColor = style.backgroundColor;\n                    if (!fontInfo.backgroundColor && backgroundColor) {\n                        fontInfo.backgroundColor = backgroundColor;\n                        seenAttributes += 1;\n                    }\n                    const fontFamily = style.fontFamily;\n                    if (!fontInfo.fontFamily && fontFamily) {\n                        fontInfo.fontFamily = fontFamily;\n                        seenAttributes += 1;\n                    }\n                    const fontSize = style.fontSize;\n                    if (!fontInfo.fontSize && fontSize) {\n                        fontInfo.fontSize = fontSize;\n                        seenAttributes += 1;\n                    }\n                }\n                element = element.parentNode;\n            }\n        }\n        return fontInfo;\n    }\n\n    /**\n     * Looks for matching tag and attributes, so won't work if <strong>\n     * instead of <b> etc.\n     */\n    hasFormat(\n        tag: string,\n        attributes?: Record<string, string> | null,\n        range?: Range,\n    ): boolean {\n        // 1. Normalise the arguments and get selection\n        tag = tag.toUpperCase();\n        if (!attributes) {\n            attributes = {};\n        }\n        if (!range) {\n            range = this.getSelection();\n        }\n\n        // Move range up one level in the DOM tree if at the edge of a text\n        // node, so we don't consider it included when it's not really.\n        if (\n            !range.collapsed &&\n            range.startContainer instanceof Text &&\n            range.startOffset === range.startContainer.length &&\n            range.startContainer.nextSibling\n        ) {\n            range.setStartBefore(range.startContainer.nextSibling);\n        }\n        if (\n            !range.collapsed &&\n            range.endContainer instanceof Text &&\n            range.endOffset === 0 &&\n            range.endContainer.previousSibling\n        ) {\n            range.setEndAfter(range.endContainer.previousSibling);\n        }\n\n        // If the common ancestor is inside the tag we require, we definitely\n        // have the format.\n        const root = this._root;\n        const common = range.commonAncestorContainer;\n        if (getNearest(common, root, tag, attributes)) {\n            return true;\n        }\n\n        // If common ancestor is a text node and doesn't have the format, we\n        // definitely don't have it.\n        if (common instanceof Text) {\n            return false;\n        }\n\n        // Otherwise, check each text node at least partially contained within\n        // the selection and make sure all of them have the format we want.\n        const walker = new TreeIterator<Text>(common, SHOW_TEXT, (node) => {\n            return isNodeContainedInRange(range!, node, true);\n        });\n\n        let seenNode = false;\n        let node: Node | null;\n        while ((node = walker.nextNode())) {\n            if (!getNearest(node, root, tag, attributes)) {\n                return false;\n            }\n            seenNode = true;\n        }\n\n        return seenNode;\n    }\n\n    changeFormat(\n        add: { tag: string; attributes?: Record<string, string> } | null,\n        remove?: { tag: string; attributes?: Record<string, string> } | null,\n        range?: Range,\n        partial?: boolean,\n    ): Squire {\n        // Normalise the arguments and get selection\n        if (!range) {\n            range = this.getSelection();\n        }\n\n        // Save undo checkpoint\n        this.saveUndoState(range);\n\n        if (remove) {\n            range = this._removeFormat(\n                remove.tag.toUpperCase(),\n                remove.attributes || {},\n                range,\n                partial,\n            );\n        }\n        if (add) {\n            range = this._addFormat(\n                add.tag.toUpperCase(),\n                add.attributes || {},\n                range,\n            );\n        }\n\n        this.setSelection(range);\n        this._updatePath(range, true);\n\n        return this.focus();\n    }\n\n    _addFormat(\n        tag: string,\n        attributes: Record<string, string> | null,\n        range: Range,\n    ): Range {\n        // If the range is collapsed we simply insert the node by wrapping\n        // it round the range and focus it.\n        const root = this._root;\n        if (range.collapsed) {\n            const el = fixCursor(createElement(tag, attributes));\n            insertNodeInRange(range, el);\n            const focusNode = el.firstChild || el;\n            // Focus after the ZWS if present\n            const focusOffset =\n                focusNode instanceof Text ? focusNode.length : 0;\n            range.setStart(focusNode, focusOffset);\n            range.collapse(true);\n\n            // Clean up any previous formats that may have been set on this\n            // block that are unused.\n            let block = el;\n            while (isInline(block)) {\n                block = block.parentNode!;\n            }\n            removeZWS(block, el);\n            // Otherwise we find all the textnodes in the range (splitting\n            // partially selected nodes) and if they're not already formatted\n            // correctly we wrap them in the appropriate tag.\n        } else {\n            // Create an iterator to walk over all the text nodes under this\n            // ancestor which are in the range and not already formatted\n            // correctly.\n            //\n            // In Blink/WebKit, empty blocks may have no text nodes, just a\n            // <br>. Therefore we wrap this in the tag as well, as this will\n            // then cause it to apply when the user types something in the\n            // block, which is presumably what was intended.\n            //\n            // IMG tags are included because we may want to create a link around\n            // them, and adding other styles is harmless.\n            const walker = new TreeIterator<Element | Text>(\n                range.commonAncestorContainer,\n                SHOW_ELEMENT_OR_TEXT,\n                (node: Node) => {\n                    return (\n                        (node instanceof Text ||\n                            node.nodeName === 'BR' ||\n                            node.nodeName === 'IMG') &&\n                        isNodeContainedInRange(range, node, true)\n                    );\n                },\n            );\n\n            // Start at the beginning node of the range and iterate through\n            // all the nodes in the range that need formatting.\n            let { startContainer, startOffset, endContainer, endOffset } =\n                range;\n\n            // Make sure we start with a valid node.\n            walker.currentNode = startContainer;\n            if (\n                (!(startContainer instanceof Element) &&\n                    !(startContainer instanceof Text)) ||\n                !walker.filter(startContainer)\n            ) {\n                const next = walker.nextNode();\n                // If there are no interesting nodes in the selection, abort\n                if (!next) {\n                    return range;\n                }\n                startContainer = next;\n                startOffset = 0;\n            }\n\n            do {\n                let node = walker.currentNode;\n                const needsFormat = !getNearest(node, root, tag, attributes);\n                if (needsFormat) {\n                    // <br> can never be a container node, so must have a text\n                    // node if node == (end|start)Container\n                    if (\n                        node === endContainer &&\n                        (node as Text).length > endOffset\n                    ) {\n                        (node as Text).splitText(endOffset);\n                    }\n                    if (node === startContainer && startOffset) {\n                        node = (node as Text).splitText(startOffset);\n                        if (endContainer === startContainer) {\n                            endContainer = node;\n                            endOffset -= startOffset;\n                        } else if (endContainer === startContainer.parentNode) {\n                            endOffset += 1;\n                        }\n                        startContainer = node;\n                        startOffset = 0;\n                    }\n                    const el = createElement(tag, attributes);\n                    replaceWith(node, el);\n                    el.appendChild(node);\n                }\n            } while (walker.nextNode());\n\n            // Now set the selection to as it was before\n            range = createRange(\n                startContainer,\n                startOffset,\n                endContainer,\n                endOffset,\n            );\n        }\n        return range;\n    }\n\n    _removeFormat(\n        tag: string,\n        attributes: Record<string, string>,\n        range: Range,\n        partial?: boolean,\n    ): Range {\n        // Add bookmark\n        this._saveRangeToBookmark(range);\n\n        // We need a node in the selection to break the surrounding\n        // formatted text.\n        let fixer: Node | Text | null | undefined;\n        if (range.collapsed) {\n            if (cantFocusEmptyTextNodes) {\n                fixer = document.createTextNode(ZWS);\n            } else {\n                fixer = document.createTextNode('');\n            }\n            insertNodeInRange(range, fixer!);\n        }\n\n        // Find block-level ancestor of selection\n        let root = range.commonAncestorContainer;\n        while (isInline(root)) {\n            root = root.parentNode!;\n        }\n\n        // Find text nodes inside formatTags that are not in selection and\n        // add an extra tag with the same formatting.\n        const startContainer = range.startContainer;\n        const startOffset = range.startOffset;\n        const endContainer = range.endContainer;\n        const endOffset = range.endOffset;\n        const toWrap: [Node, Node][] = [];\n        const examineNode = (node: Node, exemplar: Node) => {\n            // If the node is completely contained by the range then\n            // we're going to remove all formatting so ignore it.\n            if (isNodeContainedInRange(range, node, false)) {\n                return;\n            }\n\n            let child: Node;\n            let next: Node;\n\n            // If not at least partially contained, wrap entire contents\n            // in a clone of the tag we're removing and we're done.\n            if (!isNodeContainedInRange(range, node, true)) {\n                // Ignore bookmarks and empty text nodes\n                if (\n                    !(node instanceof HTMLInputElement) &&\n                    (!(node instanceof Text) || node.data)\n                ) {\n                    toWrap.push([exemplar, node]);\n                }\n                return;\n            }\n\n            // Split any partially selected text nodes.\n            if (node instanceof Text) {\n                if (node === endContainer && endOffset !== node.length) {\n                    toWrap.push([exemplar, node.splitText(endOffset)]);\n                }\n                if (node === startContainer && startOffset) {\n                    node.splitText(startOffset);\n                    toWrap.push([exemplar, node]);\n                }\n            } else {\n                // If not a text node, recurse onto all children.\n                // Beware, the tree may be rewritten with each call\n                // to examineNode, hence find the next sibling first.\n                for (child = node.firstChild!; child; child = next) {\n                    next = child.nextSibling!;\n                    examineNode(child, exemplar);\n                }\n            }\n        };\n        const formatTags = Array.from(\n            (root as Element).getElementsByTagName(tag),\n        ).filter((el: Node): boolean => {\n            return (\n                isNodeContainedInRange(range, el, true) &&\n                hasTagAttributes(el, tag, attributes)\n            );\n        });\n\n        if (!partial) {\n            formatTags.forEach((node: Node) => {\n                examineNode(node, node);\n            });\n        }\n\n        // Now wrap unselected nodes in the tag\n        toWrap.forEach(([el, node]) => {\n            el = el.cloneNode(false);\n            replaceWith(node, el);\n            el.appendChild(node);\n        });\n        // and remove old formatting tags.\n        formatTags.forEach((el: Element) => {\n            replaceWith(el, empty(el));\n        });\n\n        if (cantFocusEmptyTextNodes && fixer) {\n            // Clean up any previous ZWS in this block. They are not needed,\n            // and this works around a Chrome bug where it doesn't render the\n            // text in some situations with multiple ZWS(!)\n            fixer = fixer.parentNode;\n            let block = fixer;\n            while (block && isInline(block)) {\n                block = block.parentNode;\n            }\n            if (block) {\n                removeZWS(block, fixer);\n            }\n        }\n\n        // Merge adjacent inlines:\n        this._getRangeAndRemoveBookmark(range);\n        if (fixer) {\n            range.collapse(false);\n        }\n        mergeInlines(root, range);\n\n        return range;\n    }\n\n    // ---\n\n    bold(): Squire {\n        return this.changeFormat({ tag: 'B' });\n    }\n\n    removeBold(): Squire {\n        return this.changeFormat(null, { tag: 'B' });\n    }\n\n    italic(): Squire {\n        return this.changeFormat({ tag: 'I' });\n    }\n\n    removeItalic(): Squire {\n        return this.changeFormat(null, { tag: 'I' });\n    }\n\n    underline(): Squire {\n        return this.changeFormat({ tag: 'U' });\n    }\n\n    removeUnderline(): Squire {\n        return this.changeFormat(null, { tag: 'U' });\n    }\n\n    strikethrough(): Squire {\n        return this.changeFormat({ tag: 'S' });\n    }\n\n    removeStrikethrough(): Squire {\n        return this.changeFormat(null, { tag: 'S' });\n    }\n\n    subscript(): Squire {\n        return this.changeFormat({ tag: 'SUB' }, { tag: 'SUP' });\n    }\n\n    removeSubscript(): Squire {\n        return this.changeFormat(null, { tag: 'SUB' });\n    }\n\n    superscript(): Squire {\n        return this.changeFormat({ tag: 'SUP' }, { tag: 'SUB' });\n    }\n\n    removeSuperscript(): Squire {\n        return this.changeFormat(null, { tag: 'SUP' });\n    }\n\n    // ---\n\n    makeLink(url: string, attributes?: Record<string, string>): Squire {\n        const range = this.getSelection();\n        if (range.collapsed) {\n            let protocolEnd = url.indexOf(':') + 1;\n            if (protocolEnd) {\n                while (url[protocolEnd] === '/') {\n                    protocolEnd += 1;\n                }\n            }\n            insertNodeInRange(\n                range,\n                document.createTextNode(url.slice(protocolEnd)),\n            );\n        }\n        attributes = Object.assign(\n            {\n                href: url,\n            },\n            this._config.tagAttributes.a,\n            attributes,\n        );\n\n        return this.changeFormat(\n            {\n                tag: 'A',\n                attributes: attributes as Record<string, string>,\n            },\n            {\n                tag: 'A',\n            },\n            range,\n        );\n    }\n\n    removeLink(): Squire {\n        return this.changeFormat(\n            null,\n            {\n                tag: 'A',\n            },\n            this.getSelection(),\n            true,\n        );\n    }\n\n    /*\n    linkRegExp = new RegExp(\n        // Only look on boundaries\n        '\\\\b(?:' +\n        // Capture group 1: URLs\n        '(' +\n            // Add links to URLS\n            // Starts with:\n            '(?:' +\n                // http(s):// or ftp://\n                '(?:ht|f)tps?:\\\\/\\\\/' +\n                // or\n                '|' +\n                // www.\n                'www\\\\d{0,3}[.]' +\n                // or\n                '|' +\n                // foo90.com/\n                '[a-z0-9][a-z0-9.\\\\-]*[.][a-z]{2,}\\\\/' +\n            ')' +\n            // Then we get one or more:\n            '(?:' +\n                // Run of non-spaces, non ()<>\n                '[^\\\\s()<>]+' +\n                // or\n                '|' +\n                // balanced parentheses (one level deep only)\n                '\\\\([^\\\\s()<>]+\\\\)' +\n            ')+' +\n            // And we finish with\n            '(?:' +\n                // Not a space or punctuation character\n                '[^\\\\s?&`!()\\\\[\\\\]{};:\\'\".,<>\u00AB\u00BB\u201C\u201D\u2018\u2019]' +\n                // or\n                '|' +\n                // Balanced parentheses.\n                '\\\\([^\\\\s()<>]+\\\\)' +\n            ')' +\n        // Capture group 2: Emails\n        ')|(' +\n            // Add links to emails\n            '[\\\\w\\\\-.%+]+@(?:[\\\\w\\\\-]+\\\\.)+[a-z]{2,}\\\\b' +\n            // Allow query parameters in the mailto: style\n            '(?:' +\n                '[?][^&?\\\\s]+=[^\\\\s?&`!()\\\\[\\\\]{};:\\'\".,<>\u00AB\u00BB\u201C\u201D\u2018\u2019]+' +\n                '(?:&[^&?\\\\s]+=[^\\\\s?&`!()\\\\[\\\\]{};:\\'\".,<>\u00AB\u00BB\u201C\u201D\u2018\u2019]+)*' +\n            ')?' +\n        '))',\n        'i'\n    );\n    */\n    linkRegExp =\n        /\\b(?:((?:(?:ht|f)tps?:\\/\\/|www\\d{0,3}[.]|[a-z0-9][a-z0-9.\\-]*[.][a-z]{2,}\\/)(?:[^\\s()<>]+|\\([^\\s()<>]+\\))+(?:[^\\s?&`!()\\[\\]{};:'\".,<>\u00AB\u00BB\u201C\u201D\u2018\u2019]|\\([^\\s()<>]+\\)))|([\\w\\-.%+]+@(?:[\\w\\-]+\\.)+[a-z]{2,}\\b(?:[?][^&?\\s]+=[^\\s?&`!()\\[\\]{};:'\".,<>\u00AB\u00BB\u201C\u201D\u2018\u2019]+(?:&[^&?\\s]+=[^\\s?&`!()\\[\\]{};:'\".,<>\u00AB\u00BB\u201C\u201D\u2018\u2019]+)*)?))/i;\n\n    addDetectedLinks(\n        searchInNode: DocumentFragment | Node,\n        root?: DocumentFragment | HTMLElement,\n    ): Squire {\n        const walker = new TreeIterator<Text>(\n            searchInNode,\n            SHOW_TEXT,\n            (node) => !getNearest(node, root || this._root, 'A'),\n        );\n        const linkRegExp = this.linkRegExp;\n        const defaultAttributes = this._config.tagAttributes.a;\n        let node: Text | null;\n        while ((node = walker.nextNode())) {\n            const parent = node.parentNode!;\n            let data = node.data;\n            let match: RegExpExecArray | null;\n            while ((match = linkRegExp.exec(data))) {\n                const index = match.index;\n                const endIndex = index + match[0].length;\n                if (index) {\n                    parent.insertBefore(\n                        document.createTextNode(data.slice(0, index)),\n                        node,\n                    );\n                }\n                const child = createElement(\n                    'A',\n                    Object.assign(\n                        {\n                            href: match[1]\n                                ? /^(?:ht|f)tps?:/i.test(match[1])\n                                    ? match[1]\n                                    : 'http://' + match[1]\n                                : 'mailto:' + match[0],\n                        },\n                        defaultAttributes,\n                    ),\n                );\n                child.textContent = data.slice(index, endIndex);\n                parent.insertBefore(child, node);\n                node.data = data = data.slice(endIndex);\n            }\n        }\n        return this;\n    }\n\n    // ---\n\n    setFontFace(name: string | null): Squire {\n        const className = this._config.classNames.fontFamily;\n        return this.changeFormat(\n            name\n                ? {\n                      tag: 'SPAN',\n                      attributes: {\n                          class: className,\n                          style: 'font-family: ' + name + ', sans-serif;',\n                      },\n                  }\n                : null,\n            {\n                tag: 'SPAN',\n                attributes: { class: className },\n            },\n        );\n    }\n\n    setFontSize(size: string | null): Squire {\n        const className = this._config.classNames.fontSize;\n        return this.changeFormat(\n            size\n                ? {\n                      tag: 'SPAN',\n                      attributes: {\n                          class: className,\n                          style:\n                              'font-size: ' +\n                              (typeof size === 'number' ? size + 'px' : size),\n                      },\n                  }\n                : null,\n            {\n                tag: 'SPAN',\n                attributes: { class: className },\n            },\n        );\n    }\n\n    setTextColor(color: string | null): Squire {\n        const className = this._config.classNames.color;\n        return this.changeFormat(\n            color\n                ? {\n                      tag: 'SPAN',\n                      attributes: {\n                          class: className,\n                          style: 'color:' + color,\n                      },\n                  }\n                : null,\n            {\n                tag: 'SPAN',\n                attributes: { class: className },\n            },\n        );\n    }\n\n    setHighlightColor(color: string | null): Squire {\n        const className = this._config.classNames.highlight;\n        return this.changeFormat(\n            color\n                ? {\n                      tag: 'SPAN',\n                      attributes: {\n                          class: className,\n                          style: 'background-color:' + color,\n                      },\n                  }\n                : null,\n            {\n                tag: 'SPAN',\n                attributes: { class: className },\n            },\n        );\n    }\n\n    // --- Block formatting\n\n    _ensureBottomLine(): void {\n        const root = this._root;\n        const last = root.lastElementChild;\n        if (\n            !last ||\n            last.nodeName !== this._config.blockTag ||\n            !isBlock(last)\n        ) {\n            root.appendChild(this.createDefaultBlock());\n        }\n    }\n\n    createDefaultBlock(children?: Node[]): HTMLElement {\n        const config = this._config;\n        return fixCursor(\n            createElement(config.blockTag, config.blockAttributes, children),\n        ) as HTMLElement;\n    }\n\n    tagAfterSplit: Record<string, string> = {\n        DT: 'DD',\n        DD: 'DT',\n        LI: 'LI',\n        PRE: 'PRE',\n    };\n\n    splitBlock(lineBreakOnly: boolean, range?: Range): Squire {\n        if (!range) {\n            range = this.getSelection();\n        }\n        const root = this._root;\n        let block: Node | Element | null;\n        let parent: Node | null;\n        let node: Node;\n        let nodeAfterSplit: Node;\n\n        // Save undo checkpoint and remove any zws so we don't think there's\n        // content in an empty block.\n        this._recordUndoState(range);\n        this._removeZWS();\n        this._getRangeAndRemoveBookmark(range);\n\n        // Selected text is overwritten, therefore delete the contents\n        // to collapse selection.\n        if (!range.collapsed) {\n            deleteContentsOfRange(range, root);\n        }\n\n        // Linkify text\n        if (this._config.addLinks) {\n            moveRangeBoundariesDownTree(range);\n            const textNode = range.startContainer as Text;\n            const offset = range.startOffset;\n            setTimeout(() => {\n                linkifyText(this, textNode, offset);\n            }, 0);\n        }\n\n        block = getStartBlockOfRange(range, root);\n\n        // Inside a PRE, insert literal newline, unless on blank line.\n        if (block && (parent = getNearest(block, root, 'PRE'))) {\n            moveRangeBoundariesDownTree(range);\n            node = range.startContainer;\n            const offset = range.startOffset;\n            if (!(node instanceof Text)) {\n                node = document.createTextNode('');\n                parent.insertBefore(node, parent.firstChild);\n            }\n            // If blank line: split and insert default block\n            if (\n                !lineBreakOnly &&\n                node instanceof Text &&\n                (node.data.charAt(offset - 1) === '\\n' ||\n                    rangeDoesStartAtBlockBoundary(range, root)) &&\n                (node.data.charAt(offset) === '\\n' ||\n                    rangeDoesEndAtBlockBoundary(range, root))\n            ) {\n                node.deleteData(offset && offset - 1, offset ? 2 : 1);\n                nodeAfterSplit = split(\n                    node,\n                    offset && offset - 1,\n                    root,\n                    root,\n                ) as Node;\n                node = nodeAfterSplit.previousSibling!;\n                if (!node.textContent) {\n                    detach(node);\n                }\n                node = this.createDefaultBlock();\n                nodeAfterSplit.parentNode!.insertBefore(node, nodeAfterSplit);\n                if (!nodeAfterSplit.textContent) {\n                    detach(nodeAfterSplit);\n                }\n                range.setStart(node, 0);\n            } else {\n                (node as Text).insertData(offset, '\\n');\n                if (!node.nextSibling) {\n                    parent.appendChild(createElement('BR'));\n                }\n                // Firefox bug: if you set the selection in the text node after\n                // the new line, it draws the cursor before the line break still\n                // but if you set the selection to the equivalent position\n                // in the parent, it works.\n                if ((node as Text).length === offset + 1) {\n                    range.setStartAfter(node);\n                } else {\n                    range.setStart(node, offset + 1);\n                }\n            }\n            range.collapse(true);\n            this.setSelection(range);\n            this._updatePath(range, true);\n            this._docWasChanged();\n            return this;\n        }\n\n        // If this is a malformed bit of document or in a table;\n        // just play it safe and insert a <br>.\n        if (!block || lineBreakOnly || /^T[HD]$/.test(block.nodeName)) {\n            // If inside an <a>, move focus out\n            moveRangeBoundaryOutOf(range, 'A', root);\n            insertNodeInRange(range, createElement('BR'));\n            range.collapse(false);\n            this.setSelection(range);\n            this._updatePath(range, true);\n            return this;\n        }\n\n        // If in a list, we'll split the LI instead.\n        if ((parent = getNearest(block, root, 'LI'))) {\n            block = parent;\n        }\n\n        if (isEmptyBlock(block as Element)) {\n            if (\n                getNearest(block, root, 'UL') ||\n                getNearest(block, root, 'OL')\n            ) {\n                // Break list\n                this.decreaseListLevel(range);\n                return this;\n                // Break blockquote\n            } else if (getNearest(block, root, 'BLOCKQUOTE')) {\n                this.replaceWithBlankLine(range);\n                return this;\n            }\n        }\n\n        // Otherwise, split at cursor point.\n        node = range.startContainer;\n        const offset = range.startOffset;\n        let splitTag = this.tagAfterSplit[block.nodeName];\n        nodeAfterSplit = split(\n            node,\n            offset,\n            block.parentNode!,\n            this._root,\n        ) as Node;\n\n        const config = this._config;\n        let splitProperties: Record<string, string> | null = null;\n        if (!splitTag) {\n            splitTag = config.blockTag;\n            splitProperties = config.blockAttributes;\n        }\n\n        // Make sure the new node is the correct type.\n        if (!hasTagAttributes(nodeAfterSplit, splitTag, splitProperties)) {\n            block = createElement(splitTag, splitProperties);\n            if ((nodeAfterSplit as HTMLElement).dir) {\n                (block as HTMLElement).dir = (\n                    nodeAfterSplit as HTMLElement\n                ).dir;\n            }\n            replaceWith(nodeAfterSplit, block);\n            block.appendChild(empty(nodeAfterSplit));\n            nodeAfterSplit = block;\n        }\n\n        // Clean up any empty inlines if we hit enter at the beginning of the\n        // block\n        removeZWS(block);\n        removeEmptyInlines(block);\n        fixCursor(block);\n\n        // Focus cursor\n        // If there's a <b>/<i> etc. at the beginning of the split\n        // make sure we focus inside it.\n        while (nodeAfterSplit instanceof Element) {\n            let child = nodeAfterSplit.firstChild;\n            let next;\n\n            // Don't continue links over a block break; unlikely to be the\n            // desired outcome.\n            if (\n                nodeAfterSplit.nodeName === 'A' &&\n                (!nodeAfterSplit.textContent ||\n                    nodeAfterSplit.textContent === ZWS)\n            ) {\n                child = document.createTextNode('') as Text;\n                replaceWith(nodeAfterSplit, child);\n                nodeAfterSplit = child;\n                break;\n            }\n\n            while (child && child instanceof Text && !child.data) {\n                next = child.nextSibling;\n                if (!next || next.nodeName === 'BR') {\n                    break;\n                }\n                detach(child);\n                child = next;\n            }\n\n            // 'BR's essentially don't count; they're a browser hack.\n            // If you try to select the contents of a 'BR', FF will not let\n            // you type anything!\n            if (!child || child.nodeName === 'BR' || child instanceof Text) {\n                break;\n            }\n            nodeAfterSplit = child;\n        }\n        range = createRange(nodeAfterSplit, 0);\n        this.setSelection(range);\n        this._updatePath(range, true);\n\n        return this;\n    }\n\n    forEachBlock(\n        fn: (el: HTMLElement) => any,\n        mutates: boolean,\n        range?: Range,\n    ): Squire {\n        if (!range) {\n            range = this.getSelection();\n        }\n\n        // Save undo checkpoint\n        if (mutates) {\n            this.saveUndoState(range);\n        }\n\n        const root = this._root;\n        let start = getStartBlockOfRange(range, root);\n        const end = getEndBlockOfRange(range, root);\n        if (start && end) {\n            do {\n                if (fn(start) || start === end) {\n                    break;\n                }\n            } while ((start = getNextBlock(start, root)));\n        }\n\n        if (mutates) {\n            this.setSelection(range);\n            // Path may have changed\n            this._updatePath(range, true);\n        }\n        return this;\n    }\n\n    modifyBlocks(modify: (x: DocumentFragment) => Node, range?: Range): Squire {\n        if (!range) {\n            range = this.getSelection();\n        }\n\n        // 1. Save undo checkpoint and bookmark selection\n        this._recordUndoState(range, this._isInUndoState);\n\n        // 2. Expand range to block boundaries\n        const root = this._root;\n        expandRangeToBlockBoundaries(range, root);\n\n        // 3. Remove range.\n        moveRangeBoundariesUpTree(range, root, root, root);\n        const frag = extractContentsOfRange(range, root, root);\n\n        // 4. Modify tree of fragment and reinsert.\n        if (!range.collapsed) {\n            // After extracting contents, the range edges will still be at the\n            // level we began the spilt. We want to insert directly in the\n            // root, so move the range up there.\n            let node = range.endContainer;\n            if (node === root) {\n                range.collapse(false);\n            } else {\n                while (node.parentNode !== root) {\n                    node = node.parentNode!;\n                }\n                range.setStartBefore(node);\n                range.collapse(true);\n            }\n        }\n        insertNodeInRange(range, modify.call(this, frag));\n\n        // 5. Merge containers at edges\n        if (range.endOffset < range.endContainer.childNodes.length) {\n            mergeContainers(\n                range.endContainer.childNodes[range.endOffset],\n                root,\n            );\n        }\n        mergeContainers(\n            range.startContainer.childNodes[range.startOffset],\n            root,\n        );\n\n        // 6. Restore selection\n        this._getRangeAndRemoveBookmark(range);\n        this.setSelection(range);\n        this._updatePath(range, true);\n\n        return this;\n    }\n\n    // ---\n\n    setTextAlignment(alignment: string): Squire {\n        this.forEachBlock((block: HTMLElement) => {\n            const className = block.className\n                .split(/\\s+/)\n                .filter((klass) => {\n                    return !!klass && !/^align/.test(klass);\n                })\n                .join(' ');\n            if (alignment) {\n                block.className = className + ' align-' + alignment;\n                block.style.textAlign = alignment;\n            } else {\n                block.className = className;\n                block.style.textAlign = '';\n            }\n        }, true);\n        return this.focus();\n    }\n\n    setTextDirection(direction: string | null): Squire {\n        this.forEachBlock((block: HTMLElement) => {\n            if (direction) {\n                block.dir = direction;\n            } else {\n                block.removeAttribute('dir');\n            }\n        }, true);\n        return this.focus();\n    }\n\n    // ---\n\n    _getListSelection(\n        range: Range,\n        root: Element,\n    ): [Node, Node | null, Node | null] | null {\n        let list: Node | null = range.commonAncestorContainer;\n        let startLi: Node | null = range.startContainer;\n        let endLi: Node | null = range.endContainer;\n        while (list && list !== root && !/^[OU]L$/.test(list.nodeName)) {\n            list = list.parentNode;\n        }\n        if (!list || list === root) {\n            return null;\n        }\n        if (startLi === list) {\n            startLi = startLi.childNodes[range.startOffset];\n        }\n        if (endLi === list) {\n            endLi = endLi.childNodes[range.endOffset];\n        }\n        while (startLi && startLi.parentNode !== list) {\n            startLi = startLi.parentNode;\n        }\n        while (endLi && endLi.parentNode !== list) {\n            endLi = endLi.parentNode;\n        }\n        return [list, startLi, endLi];\n    }\n\n    increaseListLevel(range?: Range) {\n        if (!range) {\n            range = this.getSelection();\n        }\n\n        // Get start+end li in single common ancestor\n        const root = this._root;\n        const listSelection = this._getListSelection(range, root);\n        if (!listSelection) {\n            return this.focus();\n        }\n        // eslint-disable-next-line prefer-const\n        let [list, startLi, endLi] = listSelection;\n        if (!startLi || startLi === list.firstChild) {\n            return this.focus();\n        }\n\n        // Save undo checkpoint and bookmark selection\n        this._recordUndoState(range, this._isInUndoState);\n\n        // Increase list depth\n        const type = list.nodeName;\n        let newParent = startLi.previousSibling!;\n        let listAttrs: Record<string, string> | null;\n        let next: Node | null;\n        if (newParent.nodeName !== type) {\n            listAttrs = this._config.tagAttributes[type.toLowerCase()];\n            newParent = createElement(type, listAttrs);\n            list.insertBefore(newParent, startLi);\n        }\n        do {\n            next = startLi === endLi ? null : startLi.nextSibling;\n            newParent.appendChild(startLi);\n        } while ((startLi = next));\n        next = newParent.nextSibling;\n        if (next) {\n            mergeContainers(next, root);\n        }\n\n        // Restore selection\n        this._getRangeAndRemoveBookmark(range);\n        this.setSelection(range);\n        this._updatePath(range, true);\n\n        return this.focus();\n    }\n\n    decreaseListLevel(range?: Range) {\n        if (!range) {\n            range = this.getSelection();\n        }\n\n        const root = this._root;\n        const listSelection = this._getListSelection(range, root);\n        if (!listSelection) {\n            return this.focus();\n        }\n\n        // eslint-disable-next-line prefer-const\n        let [list, startLi, endLi] = listSelection;\n        if (!startLi) {\n            startLi = list.firstChild;\n        }\n        if (!endLi) {\n            endLi = list.lastChild!;\n        }\n\n        // Save undo checkpoint and bookmark selection\n        this._recordUndoState(range, this._isInUndoState);\n\n        let next: Node | null;\n        let insertBefore: Node | null = null;\n        if (startLi) {\n            // Find the new parent list node\n            let newParent = list.parentNode!;\n\n            // Split list if necessary\n            insertBefore = !endLi.nextSibling\n                ? list.nextSibling\n                : (split(list, endLi.nextSibling, newParent, root) as Node);\n\n            if (newParent !== root && newParent.nodeName === 'LI') {\n                newParent = newParent.parentNode!;\n                while (insertBefore) {\n                    next = insertBefore.nextSibling;\n                    endLi.appendChild(insertBefore);\n                    insertBefore = next;\n                }\n                insertBefore = list.parentNode!.nextSibling;\n            }\n\n            const makeNotList = !/^[OU]L$/.test(newParent.nodeName);\n            do {\n                next = startLi === endLi ? null : startLi.nextSibling;\n                list.removeChild(startLi);\n                if (makeNotList && startLi.nodeName === 'LI') {\n                    startLi = this.createDefaultBlock([empty(startLi)]);\n                }\n                newParent.insertBefore(startLi!, insertBefore);\n            } while ((startLi = next));\n        }\n\n        if (!list.firstChild) {\n            detach(list);\n        }\n\n        if (insertBefore) {\n            mergeContainers(insertBefore, root);\n        }\n\n        // Restore selection\n        this._getRangeAndRemoveBookmark(range);\n        this.setSelection(range);\n        this._updatePath(range, true);\n\n        return this.focus();\n    }\n\n    _makeList(frag: DocumentFragment, type: string): DocumentFragment {\n        const walker = getBlockWalker(frag, this._root);\n        const tagAttributes = this._config.tagAttributes;\n        const listAttrs = tagAttributes[type.toLowerCase()];\n        const listItemAttrs = tagAttributes.li;\n        let node: Node | null;\n        while ((node = walker.nextNode())) {\n            if (node.parentNode! instanceof HTMLLIElement) {\n                node = node.parentNode!;\n                walker.currentNode = node.lastChild!;\n            }\n            if (!(node instanceof HTMLLIElement)) {\n                const newLi = createElement('LI', listItemAttrs);\n                if ((node as HTMLElement).dir) {\n                    newLi.dir = (node as HTMLElement).dir;\n                }\n\n                // Have we replaced the previous block with a new <ul>/<ol>?\n                const prev: ChildNode | null = node.previousSibling;\n                if (prev && prev.nodeName === type) {\n                    prev.appendChild(newLi);\n                    detach(node);\n                    // Otherwise, replace this block with the <ul>/<ol>\n                } else {\n                    replaceWith(node, createElement(type, listAttrs, [newLi]));\n                }\n                newLi.appendChild(empty(node));\n                walker.currentNode = newLi;\n            } else {\n                node = node.parentNode;\n                const tag = node!.nodeName;\n                if (tag !== type && /^[OU]L$/.test(tag)) {\n                    replaceWith(\n                        node!,\n                        createElement(type, listAttrs, [empty(node!)]),\n                    );\n                }\n            }\n        }\n        return frag;\n    }\n\n    makeUnorderedList(): Squire {\n        this.modifyBlocks((frag) => this._makeList(frag, 'UL'));\n        return this.focus();\n    }\n\n    makeOrderedList(): Squire {\n        this.modifyBlocks((frag) => this._makeList(frag, 'OL'));\n        return this.focus();\n    }\n\n    removeList(): Squire {\n        this.modifyBlocks((frag) => {\n            const lists = frag.querySelectorAll('UL, OL');\n            const items = frag.querySelectorAll('LI');\n            const root = this._root;\n            for (let i = 0, l = lists.length; i < l; i += 1) {\n                const list = lists[i];\n                const listFrag = empty(list);\n                fixContainer(listFrag, root);\n                replaceWith(list, listFrag);\n            }\n\n            for (let i = 0, l = items.length; i < l; i += 1) {\n                const item = items[i];\n                if (isBlock(item)) {\n                    replaceWith(item, this.createDefaultBlock([empty(item)]));\n                } else {\n                    fixContainer(item, root);\n                    replaceWith(item, empty(item));\n                }\n            }\n            return frag;\n        });\n        return this.focus();\n    }\n\n    // ---\n\n    increaseQuoteLevel(range?: Range): Squire {\n        this.modifyBlocks(\n            (frag) =>\n                createElement(\n                    'BLOCKQUOTE',\n                    this._config.tagAttributes.blockquote,\n                    [frag],\n                ),\n            range,\n        );\n        return this.focus();\n    }\n\n    decreaseQuoteLevel(range?: Range): Squire {\n        this.modifyBlocks((frag) => {\n            Array.from(frag.querySelectorAll('blockquote'))\n                .filter((el: Node) => {\n                    return !getNearest(el.parentNode, frag, 'BLOCKQUOTE');\n                })\n                .forEach((el: Node) => {\n                    replaceWith(el, empty(el));\n                });\n            return frag;\n        }, range);\n        return this.focus();\n    }\n\n    removeQuote(range?: Range): Squire {\n        this.modifyBlocks((frag) => {\n            Array.from(frag.querySelectorAll('blockquote')).forEach(\n                (el: Node) => {\n                    replaceWith(el, empty(el));\n                },\n            );\n            return frag;\n        }, range);\n        return this.focus();\n    }\n\n    replaceWithBlankLine(range?: Range): Squire {\n        this.modifyBlocks(\n            (/* frag */) =>\n                this.createDefaultBlock([\n                    createElement('INPUT', {\n                        id: this.startSelectionId,\n                        type: 'hidden',\n                    }),\n                    createElement('INPUT', {\n                        id: this.endSelectionId,\n                        type: 'hidden',\n                    }),\n                ]),\n            range,\n        );\n        return this.focus();\n    }\n\n    // ---\n\n    code(): Squire {\n        const range = this.getSelection();\n        if (range.collapsed || isContainer(range.commonAncestorContainer)) {\n            this.modifyBlocks((frag) => {\n                const root = this._root;\n                const output = document.createDocumentFragment();\n                const blockWalker = getBlockWalker(frag, root);\n                let node: Element | Text | null;\n                // 1. Extract inline content; drop all blocks and contains.\n                while ((node = blockWalker.nextNode())) {\n                    // 2. Replace <br> with \\n in content\n                    let nodes = node.querySelectorAll('BR');\n                    const brBreaksLine: boolean[] = [];\n                    let l = nodes.length;\n                    // Must calculate whether the <br> breaks a line first,\n                    // because if we have two <br>s next to each other, after\n                    // the first one is converted to a block split, the second\n                    // will be at the end of a block and therefore seem to not\n                    // be a line break. But in its original context it was, so\n                    // we should also convert it to a block split.\n                    for (let i = 0; i < l; i += 1) {\n                        brBreaksLine[i] = isLineBreak(nodes[i], false);\n                    }\n                    while (l--) {\n                        const br = nodes[l];\n                        if (!brBreaksLine[l]) {\n                            detach(br);\n                        } else {\n                            replaceWith(br, document.createTextNode('\\n'));\n                        }\n                    }\n                    // 3. Remove <code>; its format clashes with <pre>\n                    nodes = node.querySelectorAll('CODE');\n                    l = nodes.length;\n                    while (l--) {\n                        replaceWith(nodes[l], empty(nodes[l]));\n                    }\n                    if (output.childNodes.length) {\n                        output.appendChild(document.createTextNode('\\n'));\n                    }\n                    output.appendChild(empty(node));\n                }\n                // 4. Replace nbsp with regular sp\n                const textWalker = new TreeIterator<Text>(output, SHOW_TEXT);\n                while ((node = textWalker.nextNode())) {\n                    // eslint-disable-next-line no-irregular-whitespace\n                    node.data = node.data.replace(/\u00A0/g, ' '); // nbsp -> sp\n                }\n                output.normalize();\n                return fixCursor(\n                    createElement('PRE', this._config.tagAttributes.pre, [\n                        output,\n                    ]),\n                );\n            }, range);\n            this.focus();\n        } else {\n            this.changeFormat(\n                {\n                    tag: 'CODE',\n                    attributes: this._config.tagAttributes.code,\n                },\n                null,\n                range,\n            );\n        }\n        return this;\n    }\n\n    removeCode(): Squire {\n        const range = this.getSelection();\n        const ancestor = range.commonAncestorContainer;\n        const inPre = getNearest(ancestor, this._root, 'PRE');\n        if (inPre) {\n            this.modifyBlocks((frag) => {\n                const root = this._root;\n                const pres = frag.querySelectorAll('PRE');\n                let l = pres.length;\n                while (l--) {\n                    const pre = pres[l];\n                    const walker = new TreeIterator<Text>(pre, SHOW_TEXT);\n                    let node: Text | null;\n                    while ((node = walker.nextNode())) {\n                        let value = node.data;\n                        value = value.replace(/ (?= )/g, '\u00A0'); // sp -> nbsp\n                        const contents = document.createDocumentFragment();\n                        let index: number;\n                        while ((index = value.indexOf('\\n')) > -1) {\n                            contents.appendChild(\n                                document.createTextNode(value.slice(0, index)),\n                            );\n                            contents.appendChild(createElement('BR'));\n                            value = value.slice(index + 1);\n                        }\n                        node.parentNode!.insertBefore(contents, node);\n                        node.data = value;\n                    }\n                    fixContainer(pre, root);\n                    replaceWith(pre, empty(pre));\n                }\n                return frag;\n            }, range);\n            this.focus();\n        } else {\n            this.changeFormat(null, { tag: 'CODE' }, range);\n        }\n        return this;\n    }\n\n    toggleCode(): Squire {\n        if (this.hasFormat('PRE') || this.hasFormat('CODE')) {\n            this.removeCode();\n        } else {\n            this.code();\n        }\n        return this;\n    }\n\n    // ---\n\n    _removeFormatting(\n        root: DocumentFragment | Element,\n        clean: DocumentFragment | Element,\n    ): DocumentFragment | Element {\n        for (\n            let node = root.firstChild, next: ChildNode | null;\n            node;\n            node = next\n        ) {\n            next = node.nextSibling;\n            if (isInline(node)) {\n                if (\n                    node instanceof Text ||\n                    node.nodeName === 'BR' ||\n                    node.nodeName === 'IMG'\n                ) {\n                    clean.appendChild(node);\n                    continue;\n                }\n            } else if (isBlock(node)) {\n                clean.appendChild(\n                    this.createDefaultBlock([\n                        this._removeFormatting(\n                            node as Element,\n                            document.createDocumentFragment(),\n                        ),\n                    ]),\n                );\n                continue;\n            }\n            this._removeFormatting(node as Element, clean);\n        }\n        return clean;\n    }\n\n    removeAllFormatting(range?: Range): Squire {\n        if (!range) {\n            range = this.getSelection();\n        }\n        if (range.collapsed) {\n            return this.focus();\n        }\n\n        const root = this._root;\n        let stopNode = range.commonAncestorContainer;\n        while (stopNode && !isBlock(stopNode)) {\n            stopNode = stopNode.parentNode!;\n        }\n        if (!stopNode) {\n            expandRangeToBlockBoundaries(range, root);\n            stopNode = root;\n        }\n        if (stopNode instanceof Text) {\n            return this.focus();\n        }\n\n        // Record undo point\n        this.saveUndoState(range);\n\n        // Avoid splitting where we're already at edges.\n        moveRangeBoundariesUpTree(range, stopNode, stopNode, root);\n\n        // Split the selection up to the block, or if whole selection in same\n        // block, expand range boundaries to ends of block and split up to root.\n        const startContainer = range.startContainer;\n        let startOffset = range.startOffset;\n        const endContainer = range.endContainer;\n        let endOffset = range.endOffset;\n\n        // Split end point first to avoid problems when end and start\n        // in same container.\n        const formattedNodes = document.createDocumentFragment();\n        const cleanNodes = document.createDocumentFragment();\n        const nodeAfterSplit = split(endContainer, endOffset, stopNode, root);\n        let nodeInSplit = split(startContainer, startOffset, stopNode, root);\n        let nextNode: ChildNode | null;\n\n        // Then replace contents in split with a cleaned version of the same:\n        // blocks become default blocks, text and leaf nodes survive, everything\n        // else is obliterated.\n        while (nodeInSplit !== nodeAfterSplit) {\n            nextNode = nodeInSplit!.nextSibling;\n            formattedNodes.appendChild(nodeInSplit!);\n            nodeInSplit = nextNode;\n        }\n        this._removeFormatting(formattedNodes, cleanNodes);\n        cleanNodes.normalize();\n        nodeInSplit = cleanNodes.firstChild;\n        nextNode = cleanNodes.lastChild;\n\n        // Restore selection\n        if (nodeInSplit) {\n            stopNode.insertBefore(cleanNodes, nodeAfterSplit);\n            const childNodes = Array.from(stopNode.childNodes) as Node[];\n            startOffset = childNodes.indexOf(nodeInSplit);\n            endOffset = nextNode ? childNodes.indexOf(nextNode) + 1 : 0;\n        } else if (nodeAfterSplit) {\n            const childNodes = Array.from(stopNode.childNodes) as Node[];\n            startOffset = childNodes.indexOf(nodeAfterSplit);\n            endOffset = startOffset;\n        }\n\n        // Merge text nodes at edges, if possible\n        range.setStart(stopNode, startOffset);\n        range.setEnd(stopNode, endOffset);\n        mergeInlines(stopNode, range);\n\n        // And move back down the tree\n        moveRangeBoundariesDownTree(range);\n\n        this.setSelection(range);\n        this._updatePath(range, true);\n\n        return this.focus();\n    }\n}\n\n// ---\n\nexport { Squire };\nexport type { SquireConfig };\n", "import { Squire } from './Editor';\n\nexport default Squire;\n"],
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}