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/* 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/. */
/**
* Listeners for the compact theme. This adds an extra stylesheet
* to browser.xul if a pref is set and no other themes are applied.
*/
var CompactTheme = {
styleSheetLocation: "chrome://browser/skin/compacttheme.css",
styleSheet: null,
initialized: false,
get isStyleSheetEnabled() {
return this.styleSheet && !this.styleSheet.sheet.disabled;
},
get isThemeCurrentlyApplied() {
let theme = LightweightThemeManager.currentTheme;
return theme && (
theme.id == "firefox-compact-dark@mozilla.org" ||
theme.id == "firefox-compact-light@mozilla.org");
},
init() {
this.initialized = true;
Services.obs.addObserver(this, "lightweight-theme-styling-update", false);
if (this.isThemeCurrentlyApplied) {
this._toggleStyleSheet(true);
}
},
createStyleSheet() {
let styleSheetAttr = `href="${this.styleSheetLocation}" type="text/css"`;
this.styleSheet = document.createProcessingInstruction(
"xml-stylesheet", styleSheetAttr);
this.styleSheet.addEventListener("load", this);
document.insertBefore(this.styleSheet, document.documentElement);
this.styleSheet.sheet.disabled = true;
},
observe(subject, topic, data) {
if (topic == "lightweight-theme-styling-update") {
let newTheme = JSON.parse(data);
if (newTheme && (
newTheme.id == "firefox-compact-light@mozilla.org" ||
newTheme.id == "firefox-compact-dark@mozilla.org")) {
// We are using the theme ID on this object instead of always referencing
// LightweightThemeManager.currentTheme in case this is a preview
this._toggleStyleSheet(true);
} else {
this._toggleStyleSheet(false);
}
}
},
handleEvent(e) {
if (e.type === "load") {
this.styleSheet.removeEventListener("load", this);
this.refreshBrowserDisplay();
}
},
refreshBrowserDisplay() {
// Don't touch things on the browser if gBrowserInit.onLoad hasn't
// yet fired.
if (this.initialized) {
gBrowser.tabContainer._positionPinnedTabs();
}
},
_toggleStyleSheet(enabled) {
let wasEnabled = this.isStyleSheetEnabled;
if (enabled) {
// The stylesheet may not have been created yet if it wasn't
// needed on initial load. Make it now.
if (!this.styleSheet) {
this.createStyleSheet();
}
this.styleSheet.sheet.disabled = false;
this.refreshBrowserDisplay();
} else if (!enabled && wasEnabled) {
this.styleSheet.sheet.disabled = true;
this.refreshBrowserDisplay();
}
},
uninit() {
Services.obs.removeObserver(this, "lightweight-theme-styling-update");
if (this.styleSheet) {
this.styleSheet.removeEventListener("load", this);
}
this.styleSheet = null;
}
};
#ifdef INSTALL_COMPACT_THEMES
// If the compact theme is going to be applied in gBrowserInit.onLoad,
// then preload it now. This prevents a flash of unstyled content where the
// normal theme is applied while the compact theme stylesheet is loading.
if (this != Services.appShell.hiddenDOMWindow && CompactTheme.isThemeCurrentlyApplied) {
CompactTheme.createStyleSheet();
}
#endif
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