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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 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 | 1x 1x 1x 1x 1x 13x 13x 12x 13x 26x 33x 33x 49x 27x 27x 27x 27x 22x 21x 2x 21x 33x 18x 20x 20x 22x 21x 21x 21x 21x 21x 21x 21x 22x 20x 20x 9x 42x 42x 51x 51x 42x 9x | import { isBlockElement } from '../domToModel/utils/isBlockElement';
import { isNodeOfType } from './isNodeOfType';
import { isPunctuation, isSpace } from './stringUtil';
const SplittingTags: string[] = ['BR', 'HR', 'IMG'];
interface SearchContext {
text: string;
matchCase: boolean;
wholeWord: boolean;
result: Range[];
paragraphText: string;
editableOnly: boolean;
indexes: {
node: Text;
length: number;
}[];
}
/**
* Search text from the given root element and return all ranges that match the search criteria
* @param root Root element to search from
* @param text Text to search for
* @param matchCase Whether to match case
* @param wholeWord Whether to match whole words only
* @param editableOnly Whether to search only in editable elements
* @returns Array of matching ranges
*/
export function getRangesByText(
root: HTMLElement,
text: string,
matchCase: boolean,
wholeWord: boolean,
editableOnly?: boolean
): Range[] {
const context: SearchContext = {
text: matchCase ? text : text.toLowerCase(),
matchCase,
wholeWord,
result: [],
paragraphText: '',
indexes: [],
editableOnly: !!editableOnly,
};
if (context.text) {
iterateTextNodes(root, context);
}
return context.result;
}
function isSplittingElement(element: HTMLElement) {
return isBlockElement(element) || SplittingTags.indexOf(element.tagName) >= 0;
}
function iterateTextNodes(root: HTMLElement, context: SearchContext) {
const canSearchText = !context.editableOnly || root.isContentEditable;
for (let node = root.firstChild; node; node = node.nextSibling) {
if (isNodeOfType(node, 'TEXT_NODE') && canSearchText) {
const nodeText = context.matchCase
? node.nodeValue || ''
: (node.nodeValue || '').toLowerCase();
Eif (nodeText) {
context.paragraphText += nodeText;
context.indexes.push({ node, length: nodeText.length });
}
} else if (isNodeOfType(node, 'ELEMENT_NODE')) {
if (context.paragraphText && isSplittingElement(node)) {
search(root.ownerDocument, context);
}
iterateTextNodes(node, context);
}
}
if (context.paragraphText && isSplittingElement(root)) {
search(root.ownerDocument, context);
}
}
function search(doc: Document, context: SearchContext) {
let offset: number;
let startIndex = 0;
while ((offset = context.paragraphText.indexOf(context.text, startIndex)) > -1) {
if (
!context.wholeWord ||
((offset == 0 || isSpaceOrPunctuation(context.paragraphText[offset - 1])) &&
(offset + context.text.length == context.paragraphText.length ||
isSpaceOrPunctuation(context.paragraphText[offset + context.text.length])))
) {
const start = findNodeAndOffset(context.indexes, offset, false /*isEnd*/);
const end = findNodeAndOffset(
context.indexes,
offset + context.text.length,
true /*isEnd*/
);
Eif (start && end) {
const range = doc.createRange();
range.setStart(start.node, start.offset);
range.setEnd(end.node, end.offset);
context.result.push(range);
}
}
startIndex = offset + context.text.length;
}
context.paragraphText = '';
context.indexes = [];
}
function isSpaceOrPunctuation(char: string) {
return isSpace(char) || isPunctuation(char);
}
function findNodeAndOffset(
lengths: { length: number; node: Text }[],
offset: number,
isEnd: boolean
): { node: Text; offset: number } | null {
let currentIndex = 0;
for (let i = 0; i < lengths.length; i++) {
const segmentLength = lengths[i].length;
if (
isEnd ? currentIndex + segmentLength >= offset : currentIndex + segmentLength > offset
) {
return { node: lengths[i].node, offset: offset - currentIndex };
}
currentIndex += segmentLength;
}
return null;
}
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