Sakurai/pdf.js
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Merge pull request #3978 from brendandahl/wait-for-render

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Wait for one page to render before fetching all pages.
This commit is contained in:
Yury Delendik 2013-12-03 06:48:17 -08:00
commit f0c830dba2
1 changed files with 31 additions and 13 deletions
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44
web/viewer.js
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@ -780,9 +780,14 @@ var PDFView = {
},
load: function pdfViewLoad(pdfDocument, scale) {
var self = this;
var onePageRendered = new PDFJS.Promise();
function bindOnAfterDraw(pageView, thumbnailView) {
// when page is painted, using the image as thumbnail base
pageView.onAfterDraw = function pdfViewLoadOnAfterDraw() {
if (!onePageRendered.isResolved) {
onePageRendered.resolve();
}
thumbnailView.setImage(pageView.canvas);
};
}
@ -831,7 +836,6 @@ var PDFView = {
var thumbnails = this.thumbnails = [];
var pagesPromise = this.pagesPromise = new PDFJS.Promise();
var self = this;
var firstPagePromise = pdfDocument.getPage(1);
@ -839,7 +843,6 @@ var PDFView = {
// viewport for all pages
firstPagePromise.then(function(pdfPage) {
var viewport = pdfPage.getViewport((scale || 1.0) * CSS_UNITS);
var pagePromises = [];
for (var pageNum = 1; pageNum <= pagesCount; ++pageNum) {
var viewportClone = viewport.clone();
var pageView = new PageView(container, pageNum, scale,
@ -850,15 +853,34 @@ var PDFView = {
bindOnAfterDraw(pageView, thumbnailView);
pages.push(pageView);
thumbnails.push(thumbnailView);
if (!PDFJS.disableAutoFetch) {
pagePromises.push(pdfDocument.getPage(pageNum).then(
function (pageView, pdfPage) {
pageView.setPdfPage(pdfPage);
}.bind(this, pageView)
));
}
}
// Fetch all the pages since the viewport is needed before printing
// starts to create the correct size canvas. Wait until one page is
// rendered so we don't tie up too many resources early on.
onePageRendered.then(function () {
if (!PDFJS.disableAutoFetch) {
var getPagesLeft = pagesCount;
for (var pageNum = 1; pageNum <= pagesCount; ++pageNum) {
pdfDocument.getPage(pageNum).then(function (pageNum, pdfPage) {
var pageView = pages[pageNum - 1];
if (!pageView.pdfPage) {
pageView.setPdfPage(pdfPage);
}
var refStr = pdfPage.ref.num + ' ' + pdfPage.ref.gen + ' R';
pagesRefMap[refStr] = pageNum;
getPagesLeft--;
if (!getPagesLeft) {
pagesPromise.resolve();
}
}.bind(null, pageNum));
}
} else {
// XXX: Printing is semi-broken with auto fetch disabled.
pagesPromise.resolve();
}
});
var event = document.createEvent('CustomEvent');
event.initCustomEvent('documentload', true, true, {});
window.dispatchEvent(event);
@ -866,10 +888,6 @@ var PDFView = {
PDFView.loadingBar.setWidth(container);
PDFFindController.firstPagePromise.resolve();
PDFJS.Promise.all(pagePromises).then(function(pages) {
pagesPromise.resolve(pages);
});
});
var prefsPromise = prefs.initializedPromise;