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Better update of line numbers

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This commit is contained in:
Matt Bierner
2021-11-04 14:34:29 -07:00
parent 28d3032473
commit c11a9ce097
1 changed files with 17 additions and 4 deletions
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21
extensions/markdown-language-features/preview-src/index.ts
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@@ -120,7 +120,6 @@ window.addEventListener('message', async event => {
case 'updateView':
if (event.data.source === documentResource) {
console.log('updateView', event.data.line);
onUpdateView(event.data.line);
}
return;
@@ -155,7 +154,6 @@ window.addEventListener('message', async event => {
// Move styles to head
// This prevents an ugly flash of unstyled content
const styles = newRoot.querySelectorAll('link');
for (const style of styles) {
style.remove();
}
@@ -165,7 +163,22 @@ window.addEventListener('message', async event => {
childrenOnly: true,
onBeforeElUpdated: (fromEl, toEl) => {
if (areEqual(fromEl, toEl)) {
fromEl.setAttribute('data-line', toEl.getAttribute('data-line')!);
// areEqual doesn't look at `data-line` so copy those over
const fromLines = fromEl.querySelectorAll('[data-line]');
const toLines = fromEl.querySelectorAll('[data-line]');
if (fromLines.length !== toLines.length) {
console.log('unexpected line number change');
}
for (let i = 0; i < fromLines.length; ++i) {
const fromChild = fromLines[i];
const toChild = toLines[i];
if (toChild) {
fromChild.setAttribute('data-line', toChild.getAttribute('data-line')!);
}
}
return false;
}
@@ -241,7 +254,7 @@ document.addEventListener('click', event => {
window.addEventListener('scroll', throttle(() => {
updateScrollProgress();
console.log('scroll');
if (scrollDisabledCount > 0) {
scrollDisabledCount -= 1;
} else {