{
  "version": 3,
  "sources": ["../../src/canvas/anchor-lifecycle.ts"],
  "sourcesContent": ["import { WeakCache } from '@tldraw/utils'\nimport { Editor, TLCommentAnchor, TLCommentThread, TLPageId, TLShapeId, VecLike } from 'tldraw'\nimport { commitCommentMutation } from './comment-mutations'\nimport { getCommentRecord, getComments, getCommentThreads, TLCommentRecord } from './comment-store'\nimport { anchorPagePoint, impreciseShapePinInset } from './thread-state'\n\ntype ShapeAnchor = Extract<TLCommentAnchor, { type: 'shape' }>\n\n/**\n * Threads converted to point anchors because their shape was deleted, kept so the anchor can be\n * restored if the shape comes back. Owned by the editor, not the registration closure: the\n * registering effect can re-run, and an undo can arrive long after the delete.\n */\nconst convertedByShapeCache = new WeakCache<\n\tEditor,\n\tMap<TLShapeId, { threadId: string; anchor: ShapeAnchor; point: VecLike }[]>\n>()\n\nfunction isAnchoredToShape(\n\tthread: TLCommentThread,\n\tshapeId: TLShapeId\n): thread is TLCommentThread & { anchor: ShapeAnchor } {\n\tconst anchor = thread.anchor\n\treturn anchor.type === 'shape' && anchor.shapeId === shapeId\n}\n\n/**\n * Keep shape-anchored threads alive across their shape's lifecycle:\n *\n * - When the shape is deleted, the thread converts to a `point` anchor where its pin last sat, so\n *   the conversation outlives the shape instead of becoming invisible.\n * - When the shape moves to another page, the thread follows: its `pageId` and each comment's\n *   denormalized `pageId` update, and the anchor keeps riding the shape.\n * - When a deleted shape comes back, the thread re-attaches \u2014 unless its pin was manually moved in\n *   the meantime, in which case the manual placement wins.\n *\n * A page move is `deleteShapes` + re-create with preserved ids inside one `editor.run`, but each\n * store write is its own operation, so \"this shape is being moved\" is never observable as a single\n * event. The handlers therefore cooperate across operations: `beforeDelete` snapshots where each\n * affected pin sits, the operation-complete pass converts threads whose shape is really gone, and\n * `afterCreate` plus that same pass restore the anchor once the store has settled. Undo/redo of a\n * move replays as a `parentId` update, so `afterChange` re-homes threads on cross-page reparents \u2014\n * including threads anchored to descendants, which move without change events of their own.\n *\n * Remote changes are ignored: the client that performed the operation runs this same maintenance\n * and syncs the result. Writes honour the {@link CommentingOptions.history} option.\n *\n * Registered by `CanvasComments` on mount; parts-built consumers can call this directly. Returns a\n * cleanup function that unregisters all handlers.\n *\n * @public\n */\nexport function registerCommentAnchorLifecycle(editor: Editor): () => void {\n\t// Pin positions snapshotted during the current operation: shape id -> (thread id -> pin page\n\t// point).\n\tconst pendingByShape = new Map<TLShapeId, Map<string, VecLike | null>>()\n\tconst convertedByShape = convertedByShapeCache.get(editor, () => new Map())\n\n\tfunction rehomeThread(thread: TLCommentThread, pageId: TLPageId, updates: TLCommentRecord[]) {\n\t\tupdates.push({ ...thread, pageId })\n\t\tfor (const comment of getComments(editor)) {\n\t\t\tif (comment.threadId === thread.id) updates.push({ ...comment, pageId })\n\t\t}\n\t}\n\n\tconst disposeBeforeDelete = editor.sideEffects.registerBeforeDeleteHandler(\n\t\t'shape',\n\t\t(shape, source) => {\n\t\t\tif (source === 'remote') return\n\t\t\tfor (const thread of getCommentThreads(editor)) {\n\t\t\t\tif (!isAnchoredToShape(thread, shape.id)) continue\n\t\t\t\tlet snapshot = pendingByShape.get(shape.id)\n\t\t\t\tif (!snapshot) {\n\t\t\t\t\tsnapshot = new Map()\n\t\t\t\t\tpendingByShape.set(shape.id, snapshot)\n\t\t\t\t}\n\t\t\t\t// Snapshot where the pin is drawn, not just the anchor point: imprecise shape pins render inset\n\t\t\t\t// toward the shape's centre, so without baking the inset in at the current zoom the pin would jump.\n\t\t\t\tlet point = anchorPagePoint(editor, thread.anchor)\n\t\t\t\tconst inset = impreciseShapePinInset(editor, thread.anchor)\n\t\t\t\tif (point && inset) {\n\t\t\t\t\tconst zoom = editor.getZoomLevel()\n\t\t\t\t\tpoint = { x: point.x + inset.x / zoom, y: point.y + inset.y / zoom }\n\t\t\t\t}\n\t\t\t\tsnapshot.set(thread.id, point)\n\t\t\t}\n\t\t}\n\t)\n\n\t// Shape ids from `convertedByShape` re-created during the current operation. Settled at operation\n\t// complete rather than in `afterCreate`: creation order within an operation is arbitrary, so a shape\n\t// can appear before its parent and not resolve an ancestor page yet.\n\tconst returnedShapeIds = new Set<TLShapeId>()\n\n\tconst disposeOperationComplete = editor.sideEffects.registerOperationCompleteHandler((source) => {\n\t\t// Only user-sourced handlers populate the maps and only local operations should settle\n\t\t// them; a remote operation completing leaves any (impossible-in-practice) leftovers for\n\t\t// the next local settle rather than judging them against remote state.\n\t\tif (source === 'remote') return\n\t\tif (pendingByShape.size === 0 && returnedShapeIds.size === 0) return\n\t\tconst settled = [...pendingByShape.entries()]\n\t\tpendingByShape.clear()\n\t\tconst returned = [...returnedShapeIds]\n\t\treturnedShapeIds.clear()\n\n\t\tconst updates: TLCommentRecord[] = []\n\t\tfor (const [shapeId, threadPoints] of settled) {\n\t\t\tif (editor.getShape(shapeId)) continue\n\t\t\tfor (const [threadId, point] of threadPoints) {\n\t\t\t\tif (!point) continue\n\t\t\t\tconst thread = getCommentRecord(editor, threadId)\n\t\t\t\tif (!thread || thread.typeName !== 'comment-thread') continue\n\t\t\t\tif (!isAnchoredToShape(thread, shapeId)) continue\n\t\t\t\tlet converted = convertedByShape.get(shapeId)\n\t\t\t\tif (!converted) {\n\t\t\t\t\tconverted = []\n\t\t\t\t\tconvertedByShape.set(shapeId, converted)\n\t\t\t\t}\n\t\t\t\tconverted.push({ threadId, anchor: thread.anchor, point })\n\t\t\t\tupdates.push({ ...thread, anchor: { type: 'point', x: point.x, y: point.y } })\n\t\t\t}\n\t\t}\n\n\t\tfor (const shapeId of returned) {\n\t\t\tconst shape = editor.getShape(shapeId)\n\t\t\tif (!shape) continue\n\t\t\tconst converted = convertedByShape.get(shapeId)\n\t\t\tif (!converted) continue\n\t\t\tconvertedByShape.delete(shapeId)\n\n\t\t\tconst pageId = editor.getAncestorPageId(shape)\n\t\t\tfor (const { threadId, anchor, point } of converted) {\n\t\t\t\tconst thread = getCommentRecord(editor, threadId)\n\t\t\t\tif (!thread || thread.typeName !== 'comment-thread') continue\n\t\t\t\t// Re-attach only threads still sitting exactly where the conversion left them \u2014 a\n\t\t\t\t// pin moved since then was placed deliberately, and that placement wins.\n\t\t\t\tconst current = thread.anchor\n\t\t\t\tif (current.type !== 'point' || current.x !== point.x || current.y !== point.y) {\n\t\t\t\t\tcontinue\n\t\t\t\t}\n\t\t\t\tif (!pageId || thread.pageId === pageId) {\n\t\t\t\t\tupdates.push({ ...thread, anchor })\n\t\t\t\t} else {\n\t\t\t\t\trehomeThread({ ...thread, anchor }, pageId, updates)\n\t\t\t\t}\n\t\t\t}\n\t\t}\n\n\t\tif (updates.length > 0) {\n\t\t\tcommitCommentMutation(editor, ({ put }) => put(updates))\n\t\t}\n\t})\n\n\tconst disposeAfterCreate = editor.sideEffects.registerAfterCreateHandler(\n\t\t'shape',\n\t\t(shape, source) => {\n\t\t\tif (source === 'remote') return\n\t\t\tif (convertedByShape.has(shape.id)) returnedShapeIds.add(shape.id)\n\t\t}\n\t)\n\n\tconst disposeAfterChange = editor.sideEffects.registerAfterChangeHandler(\n\t\t'shape',\n\t\t(prev, next, source) => {\n\t\t\tif (source === 'remote') return\n\t\t\tif (prev.parentId === next.parentId) return\n\t\t\tconst pageId = editor.getAncestorPageId(next)\n\t\t\tif (!pageId) return\n\t\t\t// Descendants move with their parent without change events of their own.\n\t\t\tconst movedIds = editor.getShapeAndDescendantIds([next.id])\n\t\t\tconst updates: TLCommentRecord[] = []\n\t\t\tfor (const thread of getCommentThreads(editor)) {\n\t\t\t\tconst anchor = thread.anchor\n\t\t\t\tif (anchor.type !== 'shape') continue\n\t\t\t\tif (!movedIds.has(anchor.shapeId)) continue\n\t\t\t\tif (thread.pageId === pageId) continue\n\t\t\t\trehomeThread(thread, pageId, updates)\n\t\t\t}\n\t\t\tif (updates.length > 0) {\n\t\t\t\tcommitCommentMutation(editor, ({ put }) => put(updates))\n\t\t\t}\n\t\t}\n\t)\n\n\treturn () => {\n\t\tdisposeBeforeDelete()\n\t\tdisposeOperationComplete()\n\t\tdisposeAfterCreate()\n\t\tdisposeAfterChange()\n\t}\n}\n"],
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