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Ignore ZWS when determining if at block boundary

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These are just added to allow Chrome to focus an empty text node, but
they should not be considered "real" content.
This commit is contained in:
Neil Jenkins 2023-09-27 14:51:26 +10:00
parent ee01d36a0f
commit 2d37608aac
1 changed files with 13 additions and 7 deletions
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16
source/range/Block.ts
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@ -1,7 +1,7 @@
import { isInline, isBlock } from '../node/Category';
import { getPreviousBlock, getNextBlock } from '../node/Block';
import { getNodeBeforeOffset, getNodeAfterOffset } from '../node/Node';
import { notWS } from '../Constants';
import { ZWS, notWS } from '../Constants';
import { isNodeContainedInRange } from './Boundaries';
import { TreeIterator, SHOW_ELEMENT_OR_TEXT } from '../node/TreeIterator';
@ -82,9 +82,12 @@ const rangeDoesStartAtBlockBoundary = (
// If in the middle or end of a text node, we're not at the boundary.
if (startContainer instanceof Text) {
if (startOffset) {
const text = startContainer.data;
for (let i = startOffset; i > 0; i -= 1) {
if (text.charAt(i - 1) !== ZWS) {
return false;
}
}
nodeAfterCursor = startContainer;
} else {
nodeAfterCursor = getNodeAfterOffset(startContainer, startOffset);
@ -121,12 +124,15 @@ const rangeDoesEndAtBlockBoundary = (range: Range, root: Element): boolean => {
let currentNode: Node;
// If in a text node with content, and not at the end, we're not
// at the boundary
// at the boundary. Ignore ZWS.
if (endContainer instanceof Text) {
const length = endContainer.data.length;
if (length && endOffset < length) {
const text = endContainer.data;
const length = text.length;
for (let i = endOffset; i < length; i += 1) {
if (text.charAt(i) !== ZWS) {
return false;
}
}
currentNode = endContainer;
} else {
currentNode = getNodeBeforeOffset(endContainer, endOffset);