yetangitu/pdf.js
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Removes PDFPageSource

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Yury Delendik 2014-09-29 08:11:46 -05:00
parent 7663942ee5
commit fe4ac86781
4 changed files with 64 additions and 77 deletions
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58
web/pdf_viewer.js
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@ -235,7 +235,6 @@ var PDFViewer = (function pdfViewer() {
var scale = this._currentScale || 1.0;
var viewport = pdfPage.getViewport(scale * CSS_UNITS);
for (var pageNum = 1; pageNum <= pagesCount; ++pageNum) {
var pageSource = new PDFPageSource(pdfDocument, pageNum);
var textLayerFactory = null;
if (!PDFJS.disableTextLayer) {
textLayerFactory = this;
@ -248,7 +247,6 @@ var PDFViewer = (function pdfViewer() {
linkService: this.linkService,
renderingQueue: this.renderingQueue,
cache: this.cache,
pageSource: pageSource,
textLayerFactory: textLayerFactory
});
bindOnAfterDraw(pageView);
@ -299,6 +297,7 @@ var PDFViewer = (function pdfViewer() {
this._currentScaleValue = null;
this.location = null;
this._pagesRotation = 0;
this._pagesRequests = [];
var container = this.viewer;
while (container.hasChildNodes()) {
@ -614,13 +613,38 @@ var PDFViewer = (function pdfViewer() {
}
},
/**
* @param {PDFPageView} pageView
* @returns {PDFPage}
* @private
*/
_ensurePdfPageLoaded: function (pageView) {
if (pageView.pdfPage) {
return Promise.resolve(pageView.pdfPage);
}
var pageNumber = pageView.id;
if (this._pagesRequests[pageNumber]) {
return this._pagesRequests[pageNumber];
}
var promise = this.pdfDocument.getPage(pageNumber).then(
function (pdfPage) {
pageView.setPdfPage(pdfPage);
this._pagesRequests[pageNumber] = null;
return pdfPage;
}.bind(this));
this._pagesRequests[pageNumber] = promise;
return promise;
},
forceRendering: function (currentlyVisiblePages) {
var visiblePages = currentlyVisiblePages || this._getVisiblePages();
var pageView = this.renderingQueue.getHighestPriority(visiblePages,
this.pages,
this.scroll.down);
if (pageView) {
this.renderingQueue.renderView(pageView);
this._ensurePdfPageLoaded(pageView).then(function () {
this.renderingQueue.renderView(pageView);
}.bind(this));
return true;
}
return false;
@ -705,31 +729,3 @@ var SimpleLinkService = (function SimpleLinkServiceClosure() {
};
return SimpleLinkService;
})();
/**
* PDFPage object source.
* @class
*/
var PDFPageSource = (function PDFPageSourceClosure() {
/**
* @constructs
* @param {PDFDocument} pdfDocument
* @param {number} pageNumber
* @constructor
*/
function PDFPageSource(pdfDocument, pageNumber) {
this.pdfDocument = pdfDocument;
this.pageNumber = pageNumber;
}
PDFPageSource.prototype = /** @lends PDFPageSource.prototype */ {
/**
* @returns {Promise<PDFPage>}
*/
getPage: function () {
return this.pdfDocument.getPage(this.pageNumber);
}
};
return PDFPageSource;
})();