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| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 | 1x 1x 1x 1x 1x | import { EMPTY_ARRAY, EMPTY_OBJECT } from "../../utils/shared";
import { isBlankOrWhiteSpace } from "../../utils/string";
import ElementNode from "../nodes/ElementNode";
import TextNode from "../nodes/TextNode";
/**
* Creates a virtual node form a DOM one
* Removes any white space text node from the element if any bedore creating the virtual node
* @param node
* @param options
* @returns
*/
export default function nodeToVirtualNode(node?: Node, options: any = {}): ElementNode | TextNode | null {
if (node === null) {
return null;
}
if (node instanceof HTMLElement) {
const tag = node.nodeName.toLowerCase();
if (tag === 'script' && !options.allowScripts) {
throw Error('Script elements are not allowed unless the allowScripts option is set to true');
}
// Remove any child text node with white spaces only from the node
node.childNodes.forEach(n => {
if (n instanceof Text && isBlankOrWhiteSpace((n as Text).textContent)) {
node.removeChild(n);
}
});
return new ElementNode(
tag,
getAttributes(node.attributes),
getChildren(node.childNodes, options)
);
}
else if (node instanceof Text) {
const content = node.textContent || '';
// Do not include text with white space characters ' ', '\t', '\r', '\n'
if (options.excludeTextWithWhiteSpacesOnly &&
isBlankOrWhiteSpace(content)) {
return null;
}
return new TextNode(content);
}
else { // Ignore comments, also we don't expect converting from fragment documents
return null;
}
}
function getAttributes(attributes: NamedNodeMap) : Record<PropertyKey, any> {
if (attributes === null) {
return EMPTY_OBJECT;
}
const count = attributes.length;
if (count == 0) {
return null;
}
const props = {};
for (let i = 0; i < attributes.length; i++) {
const { name, value } = attributes[i];
(props as any)[name] = value;
}
return props;
}
function getChildren(childNodes: NodeListOf<ChildNode>, options: any): (ElementNode | TextNode)[] {
if (childNodes === undefined) {
return EMPTY_ARRAY;
}
var vnodes: (ElementNode | TextNode)[] = [];
childNodes.forEach(childNode => {
const vnode = nodeToVirtualNode(childNode, options);
if (vnode != null) {
vnodes.push(vnode);
}
});
return vnodes;
}
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