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[Regression] Ensure that pre-rendering of the next/previous page works correctly in Presentation Mode, when horizontal scrolling was enabled

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Note how in `BaseViewer.forceRendering` the Scroll mode is used to determine how pre-rendering will work. Currently this is broken in Presentation Mode, if horizontal scrolling was enabled prior to entering fullscreen.

Furthermore, there's a few additional cases where the `this.scrollMode === ScrollMode.HORIZONTAL` check is pointless either in Presentation Mode or when a `PDFSinglePageViewer` instance is used.
This commit is contained in:
Jonas Jenwald 2018-06-21 21:45:03 +02:00
parent 6a086fa0b9
commit 05f682cd4b
3 changed files with 24 additions and 8 deletions
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18
web/base_viewer.js
View File

@ -597,11 +597,11 @@ class BaseViewer {
if (!currentPage) {
return;
}
let hPadding = (this.isInPresentationMode || this.removePageBorders) ?
0 : SCROLLBAR_PADDING;
let vPadding = (this.isInPresentationMode || this.removePageBorders) ?
0 : VERTICAL_PADDING;
if (this.scrollMode === ScrollMode.HORIZONTAL) {
const noPadding = (this.isInPresentationMode || this.removePageBorders);
let hPadding = noPadding ? 0 : SCROLLBAR_PADDING;
let vPadding = noPadding ? 0 : VERTICAL_PADDING;
if (!noPadding && this._isScrollModeHorizontal) {
const temp = hPadding;
hPadding = vPadding;
vPadding = temp;
@ -834,6 +834,10 @@ class BaseViewer {
this.container.focus();
}
get _isScrollModeHorizontal() {
throw new Error('Not implemented: _isScrollModeHorizontal');
}
get isInPresentationMode() {
return this.presentationModeState === PresentationModeState.FULLSCREEN;
}
@ -906,8 +910,8 @@ class BaseViewer {
forceRendering(currentlyVisiblePages) {
let visiblePages = currentlyVisiblePages || this._getVisiblePages();
let scrollAhead = this.scrollMode === ScrollMode.HORIZONTAL ?
this.scroll.right : this.scroll.down;
let scrollAhead = (this._isScrollModeHorizontal ?
this.scroll.right : this.scroll.down);
let pageView = this.renderingQueue.getHighestPriority(visiblePages,
this._pages,
scrollAhead);

5
web/pdf_single_page_viewer.js
View File

@ -142,6 +142,11 @@ class PDFSinglePageViewer extends BaseViewer {
location: this._location,
});
}
get _isScrollModeHorizontal() {
// The Scroll/Spread modes are never used in `PDFSinglePageViewer`.
return shadow(this, '_isScrollModeHorizontal', false);
}
}
export {

9
web/pdf_viewer.js
View File

@ -23,7 +23,7 @@ class PDFViewer extends BaseViewer {
}
_scrollIntoView({ pageDiv, pageSpot = null, }) {
if (!pageSpot) {
if (!pageSpot && !this.isInPresentationMode) {
const left = pageDiv.offsetLeft + pageDiv.clientLeft;
const right = left + pageDiv.clientWidth;
const { scrollLeft, clientWidth, } = this.container;
@ -87,6 +87,13 @@ class PDFViewer extends BaseViewer {
});
}
get _isScrollModeHorizontal() {
// Used to ensure that pre-rendering of the next/previous page works
// correctly, since Scroll/Spread modes are ignored in Presentation Mode.
return (this.isInPresentationMode ?
false : this.scrollMode === ScrollMode.HORIZONTAL);
}
setScrollMode(mode) {
if (mode === this.scrollMode) {
return;