1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file.
5 var SetIconCommon = requireNative('setIcon').SetIconCommon;
6 var sendRequest = require('sendRequest').sendRequest;
8 function loadImagePath(path, iconSize, actionType, callback) {
10 img.onerror = function() {
11 console.error('Could not load ' + actionType + ' icon \'' +
14 img.onload = function() {
15 var canvas = document.createElement('canvas');
16 canvas.width = img.width > iconSize ? iconSize : img.width;
17 canvas.height = img.height > iconSize ? iconSize : img.height;
19 var canvas_context = canvas.getContext('2d');
20 canvas_context.clearRect(0, 0, canvas.width, canvas.height);
21 canvas_context.drawImage(img, 0, 0, canvas.width, canvas.height);
22 var imageData = canvas_context.getImageData(0, 0, canvas.width,
29 function verifyImageData(imageData, iconSize) {
30 // Verify that this at least looks like an ImageData element.
31 // Unfortunately, we cannot use instanceof because the ImageData
32 // constructor is not public.
34 // We do this manually instead of using JSONSchema to avoid having these
35 // properties show up in the doc.
36 if (!('width' in imageData) ||
37 !('height' in imageData) ||
38 !('data' in imageData)) {
40 'The imageData property must contain an ImageData object or' +
41 ' dictionary of ImageData objects.');
44 if (imageData.width > iconSize ||
45 imageData.height > iconSize) {
47 'The imageData property must contain an ImageData object that ' +
48 'is no larger than ' + iconSize + ' pixels square.');
52 function setIcon(details, callback, name, parameters, actionType) {
53 var iconSizes = [19, 38];
54 if ('iconIndex' in details) {
55 sendRequest(name, [details, callback], parameters);
56 } else if ('imageData' in details) {
57 if (typeof details.imageData == 'object') {
59 for (var i = 0; i < iconSizes.length; i++) {
60 var sizeKey = iconSizes[i].toString();
61 if (sizeKey in details.imageData) {
62 verifyImageData(details.imageData[sizeKey], iconSizes[i]);
68 sendRequest(name, [details, callback], parameters,
69 {nativeFunction: SetIconCommon});
71 // If details.imageData is not dictionary with keys in set {'19', '38'},
72 // it must be an ImageData object.
73 var sizeKey = iconSizes[0].toString();
74 var imageData = details.imageData;
75 details.imageData = {};
76 details.imageData[sizeKey] = imageData;
77 verifyImageData(details.imageData[sizeKey], iconSizes[0]);
78 sendRequest(name, [details, callback], parameters,
79 {nativeFunction: SetIconCommon});
82 throw new Error('imageData property has unexpected type.');
84 } else if ('path' in details) {
85 if (typeof details.path == 'object') {
86 details.imageData = {};
88 var processIconSize = function(index) {
89 if (index == iconSizes.length) {
92 throw new Error('The path property must not be empty.');
93 sendRequest(name, [details, callback], parameters,
94 {nativeFunction: SetIconCommon});
97 var sizeKey = iconSizes[index].toString();
98 if (!(sizeKey in details.path)) {
99 processIconSize(index + 1);
103 loadImagePath(details.path[sizeKey], iconSizes[index], actionType,
104 function(imageData) {
105 details.imageData[sizeKey] = imageData;
106 processIconSize(index + 1);
111 } else if (typeof details.path == 'string') {
112 var sizeKey = iconSizes[0].toString();
113 details.imageData = {};
114 loadImagePath(details.path, iconSizes[0], actionType,
115 function(imageData) {
116 details.imageData[sizeKey] = imageData;
118 sendRequest(name, [details, callback], parameters,
119 {nativeFunction: SetIconCommon});
122 throw new Error('The path property should contain either string or ' +
123 'dictionary of strings.');
127 'Either the path or imageData property must be specified.');
131 exports.setIcon = setIcon;