Joachim Bauch
11 years ago
committed by
Joachim Bauch
4 changed files with 227 additions and 126 deletions
@ -0,0 +1,209 @@ |
|||||||
|
/* |
||||||
|
* Spreed WebRTC. |
||||||
|
* Copyright (C) 2013-2014 struktur AG |
||||||
|
* |
||||||
|
* This file is part of Spreed WebRTC. |
||||||
|
* |
||||||
|
* This program is free software: you can redistribute it and/or modify |
||||||
|
* it under the terms of the GNU Affero General Public License as published by |
||||||
|
* the Free Software Foundation, either version 3 of the License, or |
||||||
|
* (at your option) any later version. |
||||||
|
* |
||||||
|
* This program is distributed in the hope that it will be useful, |
||||||
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of |
||||||
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
||||||
|
* GNU Affero General Public License for more details. |
||||||
|
* |
||||||
|
* You should have received a copy of the GNU Affero General Public License |
||||||
|
* along with this program. If not, see <http://www.gnu.org/licenses/>.
|
||||||
|
* |
||||||
|
*/ |
||||||
|
define(['require', 'underscore', 'jquery', 'pdf'], function(require, _, $, pdf) { |
||||||
|
|
||||||
|
pdf.workerSrc = require.toUrl('pdf.worker') + ".js"; |
||||||
|
|
||||||
|
return ["$compile", function($compile) { |
||||||
|
|
||||||
|
var controller = ['$scope', '$element', '$attrs', function($scope, $element, $attrs) { |
||||||
|
|
||||||
|
var PDFCanvas = function(scope, scale, canvases) { |
||||||
|
this.scope = scope; |
||||||
|
this.canvases = canvases; |
||||||
|
this.doc = null; |
||||||
|
this.rendering = false; |
||||||
|
this.scale = scale; |
||||||
|
this.currentPage = null; |
||||||
|
this.pendingPageNumber = null; |
||||||
|
}; |
||||||
|
|
||||||
|
PDFCanvas.prototype.close = function() { |
||||||
|
if (this.currentPage) { |
||||||
|
this.currentPage.destroy(); |
||||||
|
this.currentPage = null; |
||||||
|
} |
||||||
|
if (this.doc) { |
||||||
|
this.doc.cleanup(); |
||||||
|
this.doc.destroy(); |
||||||
|
this.doc = null; |
||||||
|
} |
||||||
|
this.rendering = false; |
||||||
|
this.pendingPageNumber = null; |
||||||
|
this.scope.currentPageNumber = -1; |
||||||
|
this.scope.maxPageNumber = -1; |
||||||
|
// clear visible canvas so it's empty when we show the next document
|
||||||
|
var canvas = this.canvases[this.scope.canvasIndex]; |
||||||
|
canvas.getContext("2d").clearRect(0, 0, canvas.width, canvas.height); |
||||||
|
this.scope.$emit("pdfClosed"); |
||||||
|
}; |
||||||
|
|
||||||
|
PDFCanvas.prototype.open = function(file) { |
||||||
|
console.log("Loading PDF from", file); |
||||||
|
if (typeof file === "string") { |
||||||
|
// got a url
|
||||||
|
this._openFile(file); |
||||||
|
return; |
||||||
|
} |
||||||
|
|
||||||
|
var fp = file.file || file; |
||||||
|
if (typeof URL !== "undefined" && URL.createObjectURL) { |
||||||
|
var url = URL.createObjectURL(fp); |
||||||
|
this._openFile(url); |
||||||
|
} else { |
||||||
|
var fileReader = new FileReader(); |
||||||
|
fileReader.onload = _.bind(function(evt) { |
||||||
|
var buffer = evt.target.result; |
||||||
|
var uint8Array = new Uint8Array(buffer); |
||||||
|
this._openFile(uint8Array); |
||||||
|
}, this); |
||||||
|
fileReader.readAsArrayBuffer(fp); |
||||||
|
} |
||||||
|
}; |
||||||
|
|
||||||
|
PDFCanvas.prototype._openFile = function(source) { |
||||||
|
this.scope.$emit("pdfLoading", source); |
||||||
|
pdf.getDocument(source).then(_.bind(function(doc) { |
||||||
|
this.scope.$apply(_.bind(function(scope) { |
||||||
|
this.doc = doc; |
||||||
|
scope.maxPageNumber = doc.numPages; |
||||||
|
scope.currentPageNumber = -1; |
||||||
|
console.log("PDF loaded", doc); |
||||||
|
scope.$emit("pdfLoaded", source, doc); |
||||||
|
}, this)); |
||||||
|
}, this)); |
||||||
|
}; |
||||||
|
|
||||||
|
PDFCanvas.prototype._showPage = function(page) { |
||||||
|
console.log("Showing page", page, "/", this.scope.maxPageNumber); |
||||||
|
if (this.currentPage) { |
||||||
|
this.currentPage.destroy(); |
||||||
|
this.currentPage = null; |
||||||
|
} |
||||||
|
this.rendering = true; |
||||||
|
this.scope.currentPageNumber = page; |
||||||
|
this.scope.$emit("pdfPageLoading", page); |
||||||
|
this.doc.getPage(page).then(_.bind(function(pageObject) { |
||||||
|
console.log("Got page", pageObject); |
||||||
|
this.scope.$emit("pdfPageLoaded", page, pageObject); |
||||||
|
this.currentPage = pageObject; |
||||||
|
var viewport = pageObject.getViewport(this.scale); |
||||||
|
// use double-buffering to avoid flickering while
|
||||||
|
// the new page is rendered...
|
||||||
|
var canvas = this.canvases[1 - this.scope.canvasIndex]; |
||||||
|
canvas.width = viewport.width; |
||||||
|
canvas.height = viewport.height; |
||||||
|
var renderContext = { |
||||||
|
canvasContext: canvas.getContext("2d"), |
||||||
|
viewport: viewport |
||||||
|
}; |
||||||
|
|
||||||
|
console.log("Rendering page", pageObject); |
||||||
|
this.scope.$emit("pdfPageRendering", page); |
||||||
|
// TODO(fancycode): also render images in different resolutions for subscribed peers and send to them when ready
|
||||||
|
var renderTask = pageObject.render(renderContext); |
||||||
|
renderTask.promise.then(_.bind(function() { |
||||||
|
this.scope.$apply(_.bind(function(scope) { |
||||||
|
console.log("Rendered page", page); |
||||||
|
this.scope.$emit("pdfPageRendered", page, scope.maxPageNumber); |
||||||
|
this.rendering = false; |
||||||
|
// ...and flip the buffers...
|
||||||
|
scope.canvasIndex = 1 - scope.canvasIndex; |
||||||
|
this.showQueuedPage(); |
||||||
|
}, this)); |
||||||
|
}, this)); |
||||||
|
}, this)); |
||||||
|
}; |
||||||
|
|
||||||
|
PDFCanvas.prototype.showPage = function(page) { |
||||||
|
if (page >= 1 && page <= this.scope.maxPageNumber) { |
||||||
|
if (!this.doc || this.rendering) { |
||||||
|
this.pendingPageNumber = page; |
||||||
|
} else { |
||||||
|
this._showPage(page); |
||||||
|
} |
||||||
|
} |
||||||
|
}; |
||||||
|
|
||||||
|
PDFCanvas.prototype.prevPage = function() { |
||||||
|
this.showPage(this.scope.currentPageNumber - 1); |
||||||
|
}; |
||||||
|
|
||||||
|
PDFCanvas.prototype.nextPage = function() { |
||||||
|
this.showPage(this.scope.currentPageNumber + 1); |
||||||
|
}; |
||||||
|
|
||||||
|
PDFCanvas.prototype.showQueuedPage = function() { |
||||||
|
if (this.pendingPageNumber !== null) { |
||||||
|
this._showPage(this.pendingPageNumber); |
||||||
|
this.pendingPageNumber = null; |
||||||
|
} |
||||||
|
}; |
||||||
|
|
||||||
|
$scope.currentPageNumber = -1; |
||||||
|
$scope.maxPageNumber = -1; |
||||||
|
$scope.canvasIndex = 0; |
||||||
|
|
||||||
|
var canvases = $element.find("canvas"); |
||||||
|
var scale = 0.8; |
||||||
|
var pdfCanvas = new PDFCanvas($scope, scale, canvases); |
||||||
|
|
||||||
|
$scope.$on("openPdf", function(event, source) { |
||||||
|
pdfCanvas.open(source); |
||||||
|
}); |
||||||
|
|
||||||
|
$scope.$on("closePdf", function() { |
||||||
|
pdfCanvas.close(); |
||||||
|
}); |
||||||
|
|
||||||
|
$scope.$on("$destroy", function() { |
||||||
|
pdfCanvas.close(); |
||||||
|
pdfCanvas = null; |
||||||
|
}); |
||||||
|
|
||||||
|
$scope.$on("showPdfPage", function(event, page) { |
||||||
|
pdfCanvas.showPage(page); |
||||||
|
}); |
||||||
|
|
||||||
|
$scope.$on("showQueuedPdfPage", function() { |
||||||
|
pdfCanvas.showQueuedPage(); |
||||||
|
}); |
||||||
|
|
||||||
|
$scope.prevPage = function() { |
||||||
|
pdfCanvas.prevPage(); |
||||||
|
}; |
||||||
|
|
||||||
|
$scope.nextPage = function() { |
||||||
|
pdfCanvas.nextPage(); |
||||||
|
}; |
||||||
|
|
||||||
|
}]; |
||||||
|
|
||||||
|
return { |
||||||
|
restrict: 'E', |
||||||
|
replace: true, |
||||||
|
template: '<span><canvas ng-hide="canvasIndex"></canvas><canvas ng-show="canvasIndex"></canvas></span>', |
||||||
|
controller: controller |
||||||
|
}; |
||||||
|
|
||||||
|
}]; |
||||||
|
|
||||||
|
}); |
||||||
Loading…
Reference in new issue