gecko-dev/toolkit/content/LightweightThemeConsumer.jsm

127 lines
4.1 KiB
JavaScript

/* 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"];
Components.utils.import("resource://gre/modules/XPCOMUtils.jsm");
XPCOMUtils.defineLazyModuleGetter(this, "LightweightThemeImageOptimizer",
"resource://gre/modules/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)) {
return;
}
let screen = this._win.screen;
this._lastScreenWidth = screen.width;
this._lastScreenHeight = screen.height;
Components.classes["@mozilla.org/observer-service;1"]
.getService(Components.interfaces.nsIObserverService)
.addObserver(this, "lightweight-theme-styling-update", false);
var temp = {};
Components.utils.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,
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;
this._update(this._lastData);
}
},
destroy: function () {
if (!PrivateBrowsingUtils.isWindowPrivate(this._win)) {
Components.classes["@mozilla.org/observer-service;1"]
.getService(Components.interfaces.nsIObserverService)
.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;
aData = LightweightThemeImageOptimizer.optimize(aData, this._win.screen);
var root = this._doc.documentElement;
var active = !!aData.headerURL;
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.style.color = "";
root.style.backgroundColor = "";
root.removeAttribute("lwthemetextcolor");
root.removeAttribute("lwtheme");
}
_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");
}
#ifdef XP_MACOSX
if (active)
root.setAttribute("drawintitlebar", "true");
else
root.removeAttribute("drawintitlebar");
#endif
}
}
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(function (x) parseInt(x));
}