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Code Issues Releases Activity

Desktop: Resolves #4827: Laggy scrolling in Markdown viewer (#5496)

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Kenichi Kobayashi 2021-10-16 19:44:02 +09:00 committed by GitHub
parent 6879481fd5
commit 1d46d9f657
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1 changed files with 11 additions and 0 deletions
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packages/app-desktop/gui/note-viewer/index.html
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@ -357,6 +357,17 @@
return m ? contentElement.scrollTop / m : 0;
}
contentElement.addEventListener('wheel', webviewLib.logEnabledEventHandler(e => {
// When zoomFactor is not 1 (using an HD display is a typical case),
// DOM element's scrollTop is incorrectly calculated after wheel scroll events
// in the layer of Electron/Chromium, as of 2021-09-23.
// To avoid this problem, prevent the upstream from calculating scrollTop and
// calculate by yourself by accumulating wheel events.
// https://github.com/laurent22/joplin/pull/5496
contentElement.scrollTop = Math.max(0, Math.min(maxScrollTop(), contentElement.scrollTop + e.deltaY));
e.preventDefault();
}));
contentElement.addEventListener('scroll', webviewLib.logEnabledEventHandler(e => {
// If the last scroll event was done by the user, lastScrollEventTime is set and
// we can use that to skip the event handling. We skip it because in that case