toolkit/components/places/ColorAnalyzer.js@129ffea94266 (annotated)
toolkit/components/places/ColorAnalyzer.js
Sat, 03 Jan 2015 20:18:00 +0100
- author
- Michael Schloh von Bennewitz <michael@schloh.com>
- date
- Sat, 03 Jan 2015 20:18:00 +0100
- branch
- TOR_BUG_3246
- changeset 7
- 129ffea94266
- permissions
- -rw-r--r--
Conditionally enable double key logic according to:
private browsing mode or privacy.thirdparty.isolate preference and
implement in GetCookieStringCommon and FindCookie where it counts...
With some reservations of how to convince FindCookie users to test
condition and pass a nullptr when disabling double key logic.
| michael@0 | 1 | /* This Source Code Form is subject to the terms of the Mozilla Public |
| michael@0 | 2 | * License, v. 2.0. If a copy of the MPL was not distributed with this |
| michael@0 | 3 | * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ |
| michael@0 | 4 | |
| michael@0 | 5 | "use strict"; |
| michael@0 | 6 | |
| michael@0 | 7 | const Ci = Components.interfaces; |
| michael@0 | 8 | const Cc = Components.classes; |
| michael@0 | 9 | const Cu = Components.utils; |
| michael@0 | 10 | |
| michael@0 | 11 | Cu.import("resource://gre/modules/XPCOMUtils.jsm"); |
| michael@0 | 12 | |
| michael@0 | 13 | const XHTML_NS = "http://www.w3.org/1999/xhtml"; |
| michael@0 | 14 | const MAXIMUM_PIXELS = Math.pow(144, 2); |
| michael@0 | 15 | |
| michael@0 | 16 | function ColorAnalyzer() { |
| michael@0 | 17 | // a queue of callbacks for each job we give to the worker |
| michael@0 | 18 | this.callbacks = []; |
| michael@0 | 19 | |
| michael@0 | 20 | this.hiddenWindowDoc = Cc["@mozilla.org/appshell/appShellService;1"]. |
| michael@0 | 21 | getService(Ci.nsIAppShellService). |
| michael@0 | 22 | hiddenDOMWindow.document; |
| michael@0 | 23 | |
| michael@0 | 24 | this.worker = new ChromeWorker("resource://gre/modules/ColorAnalyzer_worker.js"); |
| michael@0 | 25 | this.worker.onmessage = this.onWorkerMessage.bind(this); |
| michael@0 | 26 | this.worker.onerror = this.onWorkerError.bind(this); |
| michael@0 | 27 | } |
| michael@0 | 28 | |
| michael@0 | 29 | ColorAnalyzer.prototype = { |
| michael@0 | 30 | findRepresentativeColor: function ColorAnalyzer_frc(imageURI, callback) { |
| michael@0 | 31 | function cleanup() { |
| michael@0 | 32 | image.removeEventListener("load", loadListener); |
| michael@0 | 33 | image.removeEventListener("error", errorListener); |
| michael@0 | 34 | } |
| michael@0 | 35 | let image = this.hiddenWindowDoc.createElementNS(XHTML_NS, "img"); |
| michael@0 | 36 | let loadListener = this.onImageLoad.bind(this, image, callback, cleanup); |
| michael@0 | 37 | let errorListener = this.onImageError.bind(this, image, callback, cleanup); |
| michael@0 | 38 | image.addEventListener("load", loadListener); |
| michael@0 | 39 | image.addEventListener("error", errorListener); |
| michael@0 | 40 | image.src = imageURI.spec; |
| michael@0 | 41 | }, |
| michael@0 | 42 | |
| michael@0 | 43 | onImageLoad: function ColorAnalyzer_onImageLoad(image, callback, cleanup) { |
| michael@0 | 44 | if (image.naturalWidth * image.naturalHeight > MAXIMUM_PIXELS) { |
| michael@0 | 45 | // this will probably take too long to process - fail |
| michael@0 | 46 | callback.onComplete(false); |
| michael@0 | 47 | } else { |
| michael@0 | 48 | let canvas = this.hiddenWindowDoc.createElementNS(XHTML_NS, "canvas"); |
| michael@0 | 49 | canvas.width = image.naturalWidth; |
| michael@0 | 50 | canvas.height = image.naturalHeight; |
| michael@0 | 51 | let ctx = canvas.getContext("2d"); |
| michael@0 | 52 | ctx.drawImage(image, 0, 0); |
| michael@0 | 53 | this.startJob(ctx.getImageData(0, 0, canvas.width, canvas.height), |
| michael@0 | 54 | callback); |
| michael@0 | 55 | } |
| michael@0 | 56 | cleanup(); |
| michael@0 | 57 | }, |
| michael@0 | 58 | |
| michael@0 | 59 | onImageError: function ColorAnalyzer_onImageError(image, callback, cleanup) { |
| michael@0 | 60 | Cu.reportError("ColorAnalyzer: image at " + image.src + " didn't load"); |
| michael@0 | 61 | callback.onComplete(false); |
| michael@0 | 62 | cleanup(); |
| michael@0 | 63 | }, |
| michael@0 | 64 | |
| michael@0 | 65 | startJob: function ColorAnalyzer_startJob(imageData, callback) { |
| michael@0 | 66 | this.callbacks.push(callback); |
| michael@0 | 67 | this.worker.postMessage({ imageData: imageData, maxColors: 1 }); |
| michael@0 | 68 | }, |
| michael@0 | 69 | |
| michael@0 | 70 | onWorkerMessage: function ColorAnalyzer_onWorkerMessage(event) { |
| michael@0 | 71 | // colors can be empty on failure |
| michael@0 | 72 | if (event.data.colors.length < 1) { |
| michael@0 | 73 | this.callbacks.shift().onComplete(false); |
| michael@0 | 74 | } else { |
| michael@0 | 75 | this.callbacks.shift().onComplete(true, event.data.colors[0]); |
| michael@0 | 76 | } |
| michael@0 | 77 | }, |
| michael@0 | 78 | |
| michael@0 | 79 | onWorkerError: function ColorAnalyzer_onWorkerError(error) { |
| michael@0 | 80 | // this shouldn't happen, but just in case |
| michael@0 | 81 | error.preventDefault(); |
| michael@0 | 82 | Cu.reportError("ColorAnalyzer worker: " + error.message); |
| michael@0 | 83 | this.callbacks.shift().onComplete(false); |
| michael@0 | 84 | }, |
| michael@0 | 85 | |
| michael@0 | 86 | classID: Components.ID("{d056186c-28a0-494e-aacc-9e433772b143}"), |
| michael@0 | 87 | QueryInterface: XPCOMUtils.generateQI([Ci.mozIColorAnalyzer]) |
| michael@0 | 88 | }; |
| michael@0 | 89 | |
| michael@0 | 90 | this.NSGetFactory = XPCOMUtils.generateNSGetFactory([ColorAnalyzer]); |
