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Merge pull request #15907 from calixteman/bug1809080

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Fix pinch-to-zoom on a macbook trackpad (bug 1809080)
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calixteman 2023-01-09 15:41:25 +01:00 committed by GitHub
commit d6f63b5fb7
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1 changed files with 19 additions and 0 deletions
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19
web/app.js
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@ -223,6 +223,7 @@ const PDFViewerApplication = {
_title: document.title,
_printAnnotationStoragePromise: null,
_touchInfo: null,
_isCtrlKeyDown: false,
// Called once when the document is loaded.
async initialize(appConfig) {
@ -1942,6 +1943,7 @@ const PDFViewerApplication = {
});
window.addEventListener("click", webViewerClick);
window.addEventListener("keydown", webViewerKeyDown);
window.addEventListener("keyup", webViewerKeyUp);
window.addEventListener("resize", _boundEvents.windowResize);
window.addEventListener("hashchange", _boundEvents.windowHashChange);
window.addEventListener("beforeprint", _boundEvents.windowBeforePrint);
@ -2030,6 +2032,7 @@ const PDFViewerApplication = {
});
window.removeEventListener("click", webViewerClick);
window.removeEventListener("keydown", webViewerKeyDown);
window.removeEventListener("keyup", webViewerKeyUp);
window.removeEventListener("resize", _boundEvents.windowResize);
window.removeEventListener("hashchange", _boundEvents.windowHashChange);
window.removeEventListener("beforeprint", _boundEvents.windowBeforePrint);
@ -2635,7 +2638,14 @@ function webViewerWheel(evt) {
return;
}
// Pinch-to-zoom on a trackpad maps to a wheel event with ctrlKey set to true
// https://developer.mozilla.org/en-US/docs/Web/API/WheelEvent#browser_compatibility
// Hence if ctrlKey is true but ctrl key hasn't been pressed then we can
// infer that we have a pinch-to-zoom.
const isPinchToZoom = evt.ctrlKey && !PDFViewerApplication._isCtrlKeyDown;
if (
isPinchToZoom ||
(evt.ctrlKey && supportedMouseWheelZoomModifierKeys.ctrlKey) ||
(evt.metaKey && supportedMouseWheelZoomModifierKeys.metaKey)
) {
@ -2818,7 +2828,16 @@ function webViewerClick(evt) {
}
}
function webViewerKeyUp(evt) {
// evt.ctrlKey is false hence we use evt.key.
if (evt.key === "Control") {
PDFViewerApplication._isCtrlKeyDown = false;
}
}
function webViewerKeyDown(evt) {
PDFViewerApplication._isCtrlKeyDown = evt.key === "Control";
if (PDFViewerApplication.overlayManager.active) {
return;
}