ZenBrowserMirrors/pdf.js
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Merge branch 'master' into disable-textlayer-opt

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This commit is contained in:
Artur Adib 2012-01-05 10:19:15 -05:00
commit 4f65198eaa
6 changed files with 98 additions and 20 deletions
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52
web/viewer.js
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@ -33,6 +33,9 @@ var RenderingQueue = (function RenderingQueueClosure() {
RenderingQueue.prototype = {
enqueueDraw: function RenderingQueueEnqueueDraw(item) {
if (!item.drawingRequired())
return; // as no redraw required, no need for queueing.
if ('rendering' in item)
return; // is already in the queue
@ -346,13 +349,14 @@ var PDFView = {
};
moreInfoButton.removeAttribute('hidden');
lessInfoButton.setAttribute('hidden', 'true');
errorMoreInfo.innerHTML = 'PDF.JS Build: ' + PDFJS.build + '\n';
errorMoreInfo.value = 'PDF.JS Build: ' + PDFJS.build + '\n';
if (moreInfo) {
errorMoreInfo.innerHTML += 'Message: ' + moreInfo.message;
errorMoreInfo.value += 'Message: ' + moreInfo.message;
if (moreInfo.stack)
errorMoreInfo.innerHTML += '\n' + 'Stack: ' + moreInfo.stack;
errorMoreInfo.value += '\n' + 'Stack: ' + moreInfo.stack;
}
errorMoreInfo.rows = errorMoreInfo.value.split('\n').length - 1;
},
progress: function pdfViewProgress(level) {
@ -366,6 +370,7 @@ var PDFView = {
// when page is painted, using the image as thumbnail base
pageView.onAfterDraw = function pdfViewLoadOnAfterDraw() {
thumbnailView.setImage(pageView.canvas);
preDraw();
};
}
@ -759,8 +764,12 @@ var PageView = function pageView(container, content, id, pageWidth, pageHeight,
}, 0);
};
this.drawingRequired = function() {
return !div.hasChildNodes();
};
this.draw = function pageviewDraw(callback) {
if (div.hasChildNodes()) {
if (!this.drawingRequired()) {
this.updateStats();
callback();
return;
@ -1011,16 +1020,49 @@ window.addEventListener('unload', function webViewerUnload(evt) {
window.scrollTo(0, 0);
}, true);
/**
* Render the next not yet visible page already such that it is
* hopefully ready once the user scrolls to it.
*/
function preDraw() {
var pages = PDFView.pages;
var visible = PDFView.getVisiblePages();
var last = visible[visible.length - 1];
// PageView.id is the actual page number, which is + 1 compared
// to the index in `pages`. That means, pages[last.id] is the next
// PageView instance.
if (pages[last.id] && pages[last.id].drawingRequired()) {
renderingQueue.enqueueDraw(pages[last.id]);
return;
}
// If there is nothing to draw on the next page, maybe the user
// is scrolling up, so, let's try to render the next page *before*
// the first visible page
if (pages[visible[0].id - 2]) {
renderingQueue.enqueueDraw(pages[visible[0].id - 2]);
}
}
function updateViewarea() {
var visiblePages = PDFView.getVisiblePages();
var pageToDraw;
for (var i = 0; i < visiblePages.length; i++) {
var page = visiblePages[i];
renderingQueue.enqueueDraw(PDFView.pages[page.id - 1]);
var pageObj = PDFView.pages[page.id - 1];
pageToDraw |= pageObj.drawingRequired();
renderingQueue.enqueueDraw(pageObj);
}
if (!visiblePages.length)
return;
// If there is no need to draw a page that is currenlty visible, preDraw the
// next page the user might scroll to.
if (!pageToDraw) {
preDraw();
}
updateViewarea.inProgress = true; // used in "set page"
var currentId = PDFView.page;
var firstPage = visiblePages[0];