yetangitu/pdf.js
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Removes PDFPageSource

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This commit is contained in:
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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61
web/thumbnail_view.js
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@ -14,7 +14,7 @@
* See the License for the specific language governing permissions and
* limitations under the License.
*/
/* globals mozL10n, RenderingStates, Promise, scrollIntoView, PDFPageSource,
/* globals mozL10n, RenderingStates, Promise, scrollIntoView,
watchScroll, getVisibleElements */
'use strict';
@ -28,13 +28,11 @@ var THUMBNAIL_SCROLL_MARGIN = -19;
* @param defaultViewport
* @param linkService
* @param renderingQueue
* @param pageSource
*
* @implements {IRenderableView}
*/
var ThumbnailView = function thumbnailView(container, id, defaultViewport,
linkService, renderingQueue,
pageSource) {
linkService, renderingQueue) {
var anchor = document.createElement('a');
anchor.href = linkService.getAnchorUrl('#page=' + id);
anchor.title = mozL10n.get('thumb_page_title', {page: id}, 'Page {{page}}');
@ -80,7 +78,6 @@ var ThumbnailView = function thumbnailView(container, id, defaultViewport,
this.hasImage = false;
this.renderingState = RenderingStates.INITIAL;
this.renderingQueue = renderingQueue;
this.pageSource = pageSource;
this.setPdfPage = function thumbnailViewSetPdfPage(pdfPage) {
this.pdfPage = pdfPage;
@ -143,15 +140,6 @@ var ThumbnailView = function thumbnailView(container, id, defaultViewport,
};
this.draw = function thumbnailViewDraw(callback) {
if (!this.pdfPage) {
var promise = this.pageSource.getPage(this.id);
promise.then(function(pdfPage) {
this.setPdfPage(pdfPage);
this.draw(callback);
}.bind(this));
return;
}
if (this.renderingState !== RenderingStates.INITIAL) {
console.error('Must be in new state before drawing');
}
@ -204,18 +192,14 @@ var ThumbnailView = function thumbnailView(container, id, defaultViewport,
return tempCanvas;
}
this.setImage = function thumbnailViewSetImage(img) {
if (!this.pdfPage) {
var promise = this.pageSource.getPage();
promise.then(function(pdfPage) {
this.setPdfPage(pdfPage);
this.setImage(img);
}.bind(this));
return;
}
this.setImage = function thumbnailViewSetImage(pageView) {
var img = pageView.canvas;
if (this.hasImage || !img) {
return;
}
if (this.pdfPage) {
this.setPdfPage(pageView.pdfPage);
}
this.renderingState = RenderingStates.FINISHED;
var ctx = this.getPageDrawContext();
@ -330,6 +314,7 @@ var PDFThumbnailViewer = (function pdfThumbnailViewer() {
_resetView: function () {
this.thumbnails = [];
this._pagesRotation = 0;
this._pagesRequests = [];
},
setDocument: function (pdfDocument) {
@ -351,15 +336,37 @@ var PDFThumbnailViewer = (function pdfThumbnailViewer() {
var pagesCount = pdfDocument.numPages;
var viewport = firstPage.getViewport(1.0);
for (var pageNum = 1; pageNum <= pagesCount; ++pageNum) {
var pageSource = new PDFPageSource(pdfDocument, pageNum);
var thumbnail = new ThumbnailView(this.container, pageNum,
viewport.clone(), this.linkService,
this.renderingQueue, pageSource);
this.renderingQueue);
this.thumbnails.push(thumbnail);
}
}.bind(this));
},
/**
* @param {PDFPageView} pageView
* @returns {PDFPage}
* @private
*/
_ensurePdfPageLoaded: function (thumbView) {
if (thumbView.pdfPage) {
return Promise.resolve(thumbView.pdfPage);
}
var pageNumber = thumbView.id;
if (this._pagesRequests[pageNumber]) {
return this._pagesRequests[pageNumber];
}
var promise = this.pdfDocument.getPage(pageNumber).then(
function (pdfPage) {
thumbView.setPdfPage(pdfPage);
this._pagesRequests[pageNumber] = null;
return pdfPage;
}.bind(this));
this._pagesRequests[pageNumber] = promise;
return promise;
},
ensureThumbnailVisible:
function PDFThumbnailViewer_ensureThumbnailVisible(page) {
// Ensure that the thumbnail of the current page is visible
@ -373,7 +380,9 @@ var PDFThumbnailViewer = (function pdfThumbnailViewer() {
this.thumbnails,
this.scroll.down);
if (thumbView) {
this.renderingQueue.renderView(thumbView);
this._ensurePdfPageLoaded(thumbView).then(function () {
this.renderingQueue.renderView(thumbView);
}.bind(this));
return true;
}
return false;