forked from mirrors/gecko-dev
105 lines
3.3 KiB
JavaScript
105 lines
3.3 KiB
JavaScript
/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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/**
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* Listeners for the compact theme. This adds an extra stylesheet
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* to browser.xul if a pref is set and no other themes are applied.
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*/
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var CompactTheme = {
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styleSheetLocation: "chrome://browser/skin/compacttheme.css",
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styleSheet: null,
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initialized: false,
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get isStyleSheetEnabled() {
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return this.styleSheet && !this.styleSheet.sheet.disabled;
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},
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get isThemeCurrentlyApplied() {
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let theme = LightweightThemeManager.currentTheme;
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return theme && (
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theme.id == "firefox-compact-dark@mozilla.org" ||
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theme.id == "firefox-compact-light@mozilla.org");
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},
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init() {
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this.initialized = true;
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Services.obs.addObserver(this, "lightweight-theme-styling-update");
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if (this.isThemeCurrentlyApplied) {
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this._toggleStyleSheet(true);
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}
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},
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createStyleSheet() {
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let styleSheetAttr = `href="${this.styleSheetLocation}" type="text/css"`;
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this.styleSheet = document.createProcessingInstruction(
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"xml-stylesheet", styleSheetAttr);
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this.styleSheet.addEventListener("load", this);
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document.insertBefore(this.styleSheet, document.documentElement);
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this.styleSheet.sheet.disabled = true;
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},
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observe(subject, topic, data) {
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if (topic == "lightweight-theme-styling-update") {
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let newTheme = JSON.parse(data);
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if (newTheme && (
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newTheme.id == "firefox-compact-light@mozilla.org" ||
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newTheme.id == "firefox-compact-dark@mozilla.org")) {
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// We are using the theme ID on this object instead of always referencing
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// LightweightThemeManager.currentTheme in case this is a preview
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this._toggleStyleSheet(true);
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} else {
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this._toggleStyleSheet(false);
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}
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}
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},
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handleEvent(e) {
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if (e.type === "load") {
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this.styleSheet.removeEventListener("load", this);
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this.refreshBrowserDisplay();
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}
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},
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refreshBrowserDisplay() {
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// Don't touch things on the browser if gBrowserInit.onLoad hasn't
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// yet fired.
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if (this.initialized) {
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gBrowser.tabContainer.themeLayoutChanged();
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}
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},
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_toggleStyleSheet(enabled) {
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let wasEnabled = this.isStyleSheetEnabled;
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if (enabled) {
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// The stylesheet may not have been created yet if it wasn't
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// needed on initial load. Make it now.
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if (!this.styleSheet) {
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this.createStyleSheet();
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}
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this.styleSheet.sheet.disabled = false;
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this.refreshBrowserDisplay();
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} else if (!enabled && wasEnabled) {
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this.styleSheet.sheet.disabled = true;
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this.refreshBrowserDisplay();
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}
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},
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uninit() {
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Services.obs.removeObserver(this, "lightweight-theme-styling-update");
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if (this.styleSheet) {
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this.styleSheet.removeEventListener("load", this);
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}
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this.styleSheet = null;
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}
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};
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// If the compact theme is going to be applied in gBrowserInit.onLoad,
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// then preload it now. This prevents a flash of unstyled content where the
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// normal theme is applied while the compact theme stylesheet is loading.
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if (AppConstants.INSTALL_COMPACT_THEMES &&
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this != Services.appShell.hiddenDOMWindow && CompactTheme.isThemeCurrentlyApplied) {
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CompactTheme.createStyleSheet();
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}
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