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Merge pull request #7573 from Snuffleupagus/mobile-viewer-async-open/close

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[mobile-viewer] Add an async `close` method to the example, and change `open` to also be async (issue 7571)
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Tim van der Meij 2016-08-27 22:45:42 +02:00 committed by GitHub
commit 8aa9b790be
1 changed files with 52 additions and 9 deletions
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61
examples/mobile-viewer/viewer.js
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@ -36,31 +36,48 @@ var MAX_SCALE = 10.0;
var DEFAULT_SCALE_VALUE = 'auto';
var PDFViewerApplication = {
pdfLoadingTask: null,
pdfDocument: null,
pdfViewer: null,
pdfHistory: null,
pdfLinkService: null,
/**
* Opens PDF document specified by URL.
* @returns {Promise} - Returns the promise, which is resolved when document
* is opened.
*/
open: function (params) {
if (this.pdfLoadingTask) {
// We need to destroy already opened document
return this.close().then(function () {
// ... and repeat the open() call.
return this.open(params);
}.bind(this));
}
var url = params.url;
var self = this;
this.setTitleUsingUrl(url);
// Loading document.
var loadingTask = PDFJS.getDocument(url);
this.pdfLoadingTask = loadingTask;
loadingTask.onProgress = function (progressData) {
self.progress(progressData.loaded / progressData.total);
};
loadingTask.then(function (pdfDocument) {
// Document loaded, specifying document for the viewer.
this.pdfDocument = pdfDocument;
this.pdfViewer.setDocument(pdfDocument);
this.pdfLinkService.setDocument(pdfDocument);
this.pdfHistory.initialize(pdfDocument.fingerprint);
this.loadingBar.hide();
this.setTitleUsingMetadata(pdfDocument);
}.bind(this), function (exception) {
return loadingTask.promise.then(function (pdfDocument) {
// Document loaded, specifying document for the viewer.
self.pdfDocument = pdfDocument;
self.pdfViewer.setDocument(pdfDocument);
self.pdfLinkService.setDocument(pdfDocument);
self.pdfHistory.initialize(pdfDocument.fingerprint);
self.loadingBar.hide();
self.setTitleUsingMetadata(pdfDocument);
}, function (exception) {
var message = exception && exception.message;
var loadingErrorMessage = mozL10n.get('loading_error', null,
'An error occurred while loading the PDF.');
@ -86,6 +103,32 @@ var PDFViewerApplication = {
});
},
/**
* Closes opened PDF document.
* @returns {Promise} - Returns the promise, which is resolved when all
* destruction is completed.
*/
close: function () {
var errorWrapper = document.getElementById('errorWrapper');
errorWrapper.setAttribute('hidden', 'true');
if (!this.pdfLoadingTask) {
return Promise.resolve();
}
var promise = this.pdfLoadingTask.destroy();
this.pdfLoadingTask = null;
if (this.pdfDocument) {
this.pdfDocument = null;
this.pdfViewer.setDocument(null);
this.pdfLinkService.setDocument(null, null);
}
return promise;
},
get loadingBar() {
var bar = new PDFJS.ProgressBar('#loadingBar', {});