1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
|
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
this.EXPORTED_SYMBOLS = ["LightweightThemeConsumer"];
const {utils: Cu} = Components;
Cu.import("resource://gre/modules/XPCOMUtils.jsm");
Cu.import("resource://gre/modules/Services.jsm");
Cu.import("resource://gre/modules/AppConstants.jsm");
XPCOMUtils.defineLazyModuleGetter(this, "LightweightThemeImageOptimizer",
"resource://gre/modules/addons/LightweightThemeImageOptimizer.jsm");
XPCOMUtils.defineLazyModuleGetter(this, "PrivateBrowsingUtils",
"resource://gre/modules/PrivateBrowsingUtils.jsm");
this.LightweightThemeConsumer =
function LightweightThemeConsumer(aDocument) {
this._doc = aDocument;
this._win = aDocument.defaultView;
this._footerId = aDocument.documentElement.getAttribute("lightweightthemesfooter");
if (PrivateBrowsingUtils.isWindowPrivate(this._win) &&
!PrivateBrowsingUtils.permanentPrivateBrowsing) {
return;
}
let screen = this._win.screen;
this._lastScreenWidth = screen.width;
this._lastScreenHeight = screen.height;
Services.obs.addObserver(this, "lightweight-theme-styling-update", false);
var temp = {};
Cu.import("resource://gre/modules/LightweightThemeManager.jsm", temp);
this._update(temp.LightweightThemeManager.currentThemeForDisplay);
this._win.addEventListener("resize", this);
}
LightweightThemeConsumer.prototype = {
_lastData: null,
_lastScreenWidth: null,
_lastScreenHeight: null,
// Whether the active lightweight theme should be shown on the window.
_enabled: true,
// Whether a lightweight theme is enabled.
_active: false,
enable: function() {
this._enabled = true;
this._update(this._lastData);
},
disable: function() {
// Dance to keep the data, but reset the applied styles:
let lastData = this._lastData
this._update(null);
this._enabled = false;
this._lastData = lastData;
},
getData: function() {
return this._enabled ? Cu.cloneInto(this._lastData, this._win) : null;
},
observe: function (aSubject, aTopic, aData) {
if (aTopic != "lightweight-theme-styling-update")
return;
this._update(JSON.parse(aData));
},
handleEvent: function (aEvent) {
let {width, height} = this._win.screen;
if (this._lastScreenWidth != width || this._lastScreenHeight != height) {
this._lastScreenWidth = width;
this._lastScreenHeight = height;
if (!this._active)
return;
this._update(this._lastData);
Services.obs.notifyObservers(this._win, "lightweight-theme-optimized",
JSON.stringify(this._lastData));
}
},
destroy: function () {
if (!PrivateBrowsingUtils.isWindowPrivate(this._win) ||
PrivateBrowsingUtils.permanentPrivateBrowsing) {
Services.obs.removeObserver(this, "lightweight-theme-styling-update");
this._win.removeEventListener("resize", this);
}
this._win = this._doc = null;
},
_update: function (aData) {
if (!aData) {
aData = { headerURL: "", footerURL: "", textcolor: "", accentcolor: "" };
this._lastData = aData;
} else {
this._lastData = aData;
aData = LightweightThemeImageOptimizer.optimize(aData, this._win.screen);
}
if (!this._enabled)
return;
let root = this._doc.documentElement;
let active = !!aData.headerURL;
let stateChanging = (active != this._active);
// We need to clear these either way: either because the theme is being removed,
// or because we are applying a new theme and the data might be bogus CSS,
// so if we don't reset first, it'll keep the old value.
root.style.removeProperty("color");
root.style.removeProperty("background-color");
if (active) {
root.style.color = aData.textcolor || "black";
root.style.backgroundColor = aData.accentcolor || "white";
let [r, g, b] = _parseRGB(this._doc.defaultView.getComputedStyle(root, "").color);
let luminance = 0.2125 * r + 0.7154 * g + 0.0721 * b;
root.setAttribute("lwthemetextcolor", luminance <= 110 ? "dark" : "bright");
root.setAttribute("lwtheme", "true");
} else {
root.removeAttribute("lwthemetextcolor");
root.removeAttribute("lwtheme");
}
this._active = active;
_setImage(root, active, aData.headerURL);
if (this._footerId) {
let footer = this._doc.getElementById(this._footerId);
footer.style.backgroundColor = active ? aData.accentcolor || "white" : "";
_setImage(footer, active, aData.footerURL);
if (active && aData.footerURL)
footer.setAttribute("lwthemefooter", "true");
else
footer.removeAttribute("lwthemefooter");
}
// On OS X, we extend the lightweight theme into the titlebar, which means setting
// the chromemargin attribute. Some XUL applications already draw in the titlebar,
// so we need to save the chromemargin value before we overwrite it with the value
// that lets us draw in the titlebar. We stash this value on the root attribute so
// that XUL applications have the ability to invalidate the saved value.
if (AppConstants.platform == "macosx" && stateChanging) {
if (!root.hasAttribute("chromemargin-nonlwtheme")) {
root.setAttribute("chromemargin-nonlwtheme", root.getAttribute("chromemargin"));
}
if (active) {
root.setAttribute("chromemargin", "0,-1,-1,-1");
} else {
let defaultChromemargin = root.getAttribute("chromemargin-nonlwtheme");
if (defaultChromemargin) {
root.setAttribute("chromemargin", defaultChromemargin);
} else {
root.removeAttribute("chromemargin");
}
}
}
Services.obs.notifyObservers(this._win, "lightweight-theme-window-updated",
JSON.stringify(aData));
}
}
function _setImage(aElement, aActive, aURL) {
aElement.style.backgroundImage =
(aActive && aURL) ? 'url("' + aURL.replace(/"/g, '\\"') + '")' : "";
}
function _parseRGB(aColorString) {
var rgb = aColorString.match(/^rgba?\((\d+), (\d+), (\d+)/);
rgb.shift();
return rgb.map(x => parseInt(x));
}
|
