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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 | 1x 1x 1x 124x 124x 124x 124x 124x 1x 122x 1x 90x 1x 397x 397x 228x 124x 234x 234x 234x 234x 234x 234x 234x 234x 234x 497x 497x 497x 2x 495x 141x 2x 2x 139x 493x 472x 3x 1x 2x 472x 5x 5x 5x 5x 16x 9x 7x 4x 16x 12x 12x 16x 234x 228x 5x 228x 5x 6x 1x 1x 124x | import { createDOMHelper } from '../../editor/core/DOMHelperImpl';
import {
findClosestBlockEntityContainer,
findClosestEntityWrapper,
isNodeOfType,
} from 'roosterjs-content-model-dom';
import type { DOMHelper, TextMutationObserver } from 'roosterjs-content-model-types';
import type { Mutation } from './MutationType';
class TextMutationObserverImpl implements TextMutationObserver {
private observer: MutationObserver;
private domHelper: DOMHelper;
constructor(
private contentDiv: HTMLDivElement,
private onMutation: (mutation: Mutation) => void
) {
this.observer = new MutationObserver(this.onMutationInternal);
this.domHelper = createDOMHelper(contentDiv);
}
startObserving() {
this.observer.observe(this.contentDiv, {
subtree: true,
childList: true,
attributes: true,
characterData: true,
});
}
stopObserving() {
this.observer.disconnect();
}
flushMutations(ignoreMutations?: boolean) {
const mutations = this.observer.takeRecords();
if (!ignoreMutations) {
this.onMutationInternal(mutations);
}
}
private onMutationInternal = (mutations: MutationRecord[]) => {
let canHandle = true;
let firstTarget: Node | null = null;
let lastTextChangeNode: Node | null = null;
let addedNodes: Node[] = [];
let removedNodes: Node[] = [];
let reconcileText = false;
const ignoredNodes = new Set<Node>();
const includedNodes = new Set<Node>();
for (let i = 0; i < mutations.length && canHandle; i++) {
const mutation = mutations[i];
const target = mutation.target;
if (ignoredNodes.has(target)) {
continue;
} else if (!includedNodes.has(target)) {
if (
findClosestEntityWrapper(target, this.domHelper) ||
findClosestBlockEntityContainer(target, this.domHelper)
) {
ignoredNodes.add(target);
continue;
} else {
includedNodes.add(target);
}
}
switch (mutation.type) {
case 'attributes':
if (this.domHelper.isNodeInEditor(target, true /*excludingSelf*/)) {
if (
mutation.attributeName == 'id' &&
isNodeOfType(target, 'ELEMENT_NODE')
) {
this.onMutation({ type: 'elementId', element: target });
} else {
// We cannot handle attributes changes on editor content for now
canHandle = false;
}
}
break;
case 'characterData':
Iif (lastTextChangeNode && lastTextChangeNode != mutation.target) {
// Multiple text nodes got changed, we don't know how to handle it
canHandle = false;
} else {
lastTextChangeNode = mutation.target;
reconcileText = true;
}
break;
case 'childList':
if (!firstTarget) {
firstTarget = mutation.target;
} else if (firstTarget != mutation.target) {
canHandle = false;
}
if (canHandle) {
addedNodes = addedNodes.concat(Array.from(mutation.addedNodes));
removedNodes = removedNodes.concat(Array.from(mutation.removedNodes));
}
break;
}
}
if (canHandle) {
if (addedNodes.length > 0 || removedNodes.length > 0) {
this.onMutation({
type: 'childList',
addedNodes,
removedNodes,
});
}
if (reconcileText) {
this.onMutation({ type: 'text' });
}
} else {
this.onMutation({ type: 'unknown' });
}
};
}
/**
* @internal
*/
export function createTextMutationObserver(
contentDiv: HTMLDivElement,
onMutation: (mutation: Mutation) => void
): TextMutationObserver {
return new TextMutationObserverImpl(contentDiv, onMutation);
}
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