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authorMatt A. Tobin <email@mattatobin.com>2018-02-02 03:32:58 -0500
committerMatt A. Tobin <email@mattatobin.com>2018-02-02 03:32:58 -0500
commite72ef92b5bdc43cd2584198e2e54e951b70299e8 (patch)
tree01ceb4a897c33eca9e7ccf2bc3aefbe530169fe5 /application/basilisk/base/content/browser-sidebar.js
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Add Basilisk
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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/. */
+
+/**
+ * SidebarUI controls showing and hiding the browser sidebar.
+ *
+ * @note
+ * Some of these methods take a commandID argument - we expect to find a
+ * xul:broadcaster element with the specified ID.
+ * The following attributes on that element may be used and/or modified:
+ * - id (required) the string to match commandID. The convention
+ * is to use this naming scheme: 'view<sidebar-name>Sidebar'.
+ * - sidebarurl (required) specifies the URL to load in this sidebar.
+ * - sidebartitle or label (in that order) specify the title to
+ * display on the sidebar.
+ * - checked indicates whether the sidebar is currently displayed.
+ * Note that toggleSidebar updates this attribute when
+ * it changes the sidebar's visibility.
+ * - group this attribute must be set to "sidebar".
+ */
+var SidebarUI = {
+ browser: null,
+
+ _box: null,
+ _title: null,
+ _splitter: null,
+
+ init() {
+ this._box = document.getElementById("sidebar-box");
+ this.browser = document.getElementById("sidebar");
+ this._title = document.getElementById("sidebar-title");
+ this._splitter = document.getElementById("sidebar-splitter");
+
+ if (!this.adoptFromWindow(window.opener)) {
+ let commandID = this._box.getAttribute("sidebarcommand");
+ if (commandID) {
+ let command = document.getElementById(commandID);
+ if (command) {
+ this._delayedLoad = true;
+ this._box.hidden = false;
+ this._splitter.hidden = false;
+ command.setAttribute("checked", "true");
+ } else {
+ // Remove the |sidebarcommand| attribute, because the element it
+ // refers to no longer exists, so we should assume this sidebar
+ // panel has been uninstalled. (249883)
+ this._box.removeAttribute("sidebarcommand");
+ }
+ }
+ }
+ },
+
+ uninit() {
+ let enumerator = Services.wm.getEnumerator(null);
+ enumerator.getNext();
+ if (!enumerator.hasMoreElements()) {
+ document.persist("sidebar-box", "sidebarcommand");
+ document.persist("sidebar-box", "width");
+ document.persist("sidebar-box", "src");
+ document.persist("sidebar-title", "value");
+ }
+ },
+
+ /**
+ * Try and adopt the status of the sidebar from another window.
+ * @param {Window} sourceWindow - Window to use as a source for sidebar status.
+ * @return true if we adopted the state, or false if the caller should
+ * initialize the state itself.
+ */
+ adoptFromWindow(sourceWindow) {
+ // No source window, or it being closed, or not chrome, or in a different
+ // private-browsing context means we can't adopt.
+ if (!sourceWindow || sourceWindow.closed ||
+ !sourceWindow.document.documentURIObject.schemeIs("chrome") ||
+ PrivateBrowsingUtils.isWindowPrivate(window) != PrivateBrowsingUtils.isWindowPrivate(sourceWindow)) {
+ return false;
+ }
+
+ // If the opener had a sidebar, open the same sidebar in our window.
+ // The opener can be the hidden window too, if we're coming from the state
+ // where no windows are open, and the hidden window has no sidebar box.
+ let sourceUI = sourceWindow.SidebarUI;
+ if (!sourceUI || !sourceUI._box) {
+ // no source UI or no _box means we also can't adopt the state.
+ return false;
+ }
+ if (sourceUI._box.hidden) {
+ // just hidden means we have adopted the hidden state.
+ return true;
+ }
+
+ let commandID = sourceUI._box.getAttribute("sidebarcommand");
+ let commandElem = document.getElementById(commandID);
+
+ // dynamically generated sidebars will fail this check, but we still
+ // consider it adopted.
+ if (!commandElem) {
+ return true;
+ }
+
+ this._title.setAttribute("value",
+ sourceUI._title.getAttribute("value"));
+ this._box.setAttribute("width", sourceUI._box.boxObject.width);
+
+ this._box.setAttribute("sidebarcommand", commandID);
+ // Note: we're setting 'src' on this._box, which is a <vbox>, not on
+ // the <browser id="sidebar">. This lets us delay the actual load until
+ // delayedStartup().
+ this._box.setAttribute("src", sourceUI.browser.getAttribute("src"));
+ this._delayedLoad = true;
+
+ this._box.hidden = false;
+ this._splitter.hidden = false;
+ commandElem.setAttribute("checked", "true");
+ return true;
+ },
+
+ /**
+ * If loading a sidebar was delayed on startup, start the load now.
+ */
+ startDelayedLoad() {
+ if (!this._delayedLoad) {
+ return;
+ }
+
+ this.browser.setAttribute("src", this._box.getAttribute("src"));
+ },
+
+ /**
+ * Fire a "SidebarFocused" event on the sidebar's |window| to give the sidebar
+ * a chance to adjust focus as needed. An additional event is needed, because
+ * we don't want to focus the sidebar when it's opened on startup or in a new
+ * window, only when the user opens the sidebar.
+ */
+ _fireFocusedEvent() {
+ let event = new CustomEvent("SidebarFocused", {bubbles: true});
+ this.browser.contentWindow.dispatchEvent(event);
+
+ // Run the original function for backwards compatibility.
+ fireSidebarFocusedEvent();
+ },
+
+ /**
+ * True if the sidebar is currently open.
+ */
+ get isOpen() {
+ return !this._box.hidden;
+ },
+
+ /**
+ * The ID of the current sidebar (ie, the ID of the broadcaster being used).
+ * This can be set even if the sidebar is hidden.
+ */
+ get currentID() {
+ return this._box.getAttribute("sidebarcommand");
+ },
+
+ get title() {
+ return this._title.value;
+ },
+
+ set title(value) {
+ this._title.value = value;
+ },
+
+ /**
+ * Toggle the visibility of the sidebar. If the sidebar is hidden or is open
+ * with a different commandID, then the sidebar will be opened using the
+ * specified commandID. Otherwise the sidebar will be hidden.
+ *
+ * @param {string} commandID ID of the xul:broadcaster element to use.
+ * @return {Promise}
+ */
+ toggle(commandID = this.currentID) {
+ if (this.isOpen && commandID == this.currentID) {
+ this.hide();
+ return Promise.resolve();
+ }
+ return this.show(commandID);
+ },
+
+ /**
+ * Show the sidebar, using the parameters from the specified broadcaster.
+ * @see SidebarUI note.
+ *
+ * @param {string} commandID ID of the xul:broadcaster element to use.
+ */
+ show(commandID) {
+ return new Promise((resolve, reject) => {
+ let sidebarBroadcaster = document.getElementById(commandID);
+ if (!sidebarBroadcaster || sidebarBroadcaster.localName != "broadcaster") {
+ reject(new Error("Invalid sidebar broadcaster specified: " + commandID));
+ return;
+ }
+
+ if (this.isOpen && commandID != this.currentID) {
+ BrowserUITelemetry.countSidebarEvent(this.currentID, "hide");
+ }
+
+ let broadcasters = document.getElementsByAttribute("group", "sidebar");
+ for (let broadcaster of broadcasters) {
+ // skip elements that observe sidebar broadcasters and random
+ // other elements
+ if (broadcaster.localName != "broadcaster") {
+ continue;
+ }
+
+ if (broadcaster != sidebarBroadcaster) {
+ broadcaster.removeAttribute("checked");
+ } else {
+ sidebarBroadcaster.setAttribute("checked", "true");
+ }
+ }
+
+ this._box.hidden = false;
+ this._splitter.hidden = false;
+
+ this._box.setAttribute("sidebarcommand", sidebarBroadcaster.id);
+
+ let title = sidebarBroadcaster.getAttribute("sidebartitle");
+ if (!title) {
+ title = sidebarBroadcaster.getAttribute("label");
+ }
+ this._title.value = title;
+
+ let url = sidebarBroadcaster.getAttribute("sidebarurl");
+ this.browser.setAttribute("src", url); // kick off async load
+
+ // We set this attribute here in addition to setting it on the <browser>
+ // element itself, because the code in SidebarUI.uninit() persists this
+ // attribute, not the "src" of the <browser id="sidebar">. The reason it
+ // does that is that we want to delay sidebar load a bit when a browser
+ // window opens. See delayedStartup() and SidebarUI.startDelayedLoad().
+ this._box.setAttribute("src", url);
+
+ if (this.browser.contentDocument.location.href != url) {
+ let onLoad = event => {
+ this.browser.removeEventListener("load", onLoad, true);
+
+ // We're handling the 'load' event before it bubbles up to the usual
+ // (non-capturing) event handlers. Let it bubble up before firing the
+ // SidebarFocused event.
+ setTimeout(() => this._fireFocusedEvent(), 0);
+
+ // Run the original function for backwards compatibility.
+ sidebarOnLoad(event);
+
+ resolve();
+ };
+
+ this.browser.addEventListener("load", onLoad, true);
+ } else {
+ // Older code handled this case, so we do it too.
+ this._fireFocusedEvent();
+ resolve();
+ }
+
+ let selBrowser = gBrowser.selectedBrowser;
+ selBrowser.messageManager.sendAsyncMessage("Sidebar:VisibilityChange",
+ {commandID, isOpen: true}
+ );
+ BrowserUITelemetry.countSidebarEvent(commandID, "show");
+ });
+ },
+
+ /**
+ * Hide the sidebar.
+ */
+ hide() {
+ if (!this.isOpen) {
+ return;
+ }
+
+ let commandID = this._box.getAttribute("sidebarcommand");
+ let sidebarBroadcaster = document.getElementById(commandID);
+
+ if (sidebarBroadcaster.getAttribute("checked") != "true") {
+ return;
+ }
+
+ // Replace the document currently displayed in the sidebar with about:blank
+ // so that we can free memory by unloading the page. We need to explicitly
+ // create a new content viewer because the old one doesn't get destroyed
+ // until about:blank has loaded (which does not happen as long as the
+ // element is hidden).
+ this.browser.setAttribute("src", "about:blank");
+ this.browser.docShell.createAboutBlankContentViewer(null);
+
+ sidebarBroadcaster.removeAttribute("checked");
+ this._box.setAttribute("sidebarcommand", "");
+ this._title.value = "";
+ this._box.hidden = true;
+ this._splitter.hidden = true;
+
+ let selBrowser = gBrowser.selectedBrowser;
+ selBrowser.focus();
+ selBrowser.messageManager.sendAsyncMessage("Sidebar:VisibilityChange",
+ {commandID, isOpen: false}
+ );
+ BrowserUITelemetry.countSidebarEvent(commandID, "hide");
+ },
+};
+
+/**
+ * This exists for backards compatibility - it will be called once a sidebar is
+ * ready, following any request to show it.
+ *
+ * @deprecated
+ */
+function fireSidebarFocusedEvent() {}
+
+/**
+ * This exists for backards compatibility - it gets called when a sidebar has
+ * been loaded.
+ *
+ * @deprecated
+ */
+function sidebarOnLoad(event) {}
+
+/**
+ * This exists for backards compatibility, and is equivilent to
+ * SidebarUI.toggle() without the forceOpen param. With forceOpen set to true,
+ * it is equalivent to SidebarUI.show().
+ *
+ * @deprecated
+ */
+function toggleSidebar(commandID, forceOpen = false) {
+ Deprecated.warning("toggleSidebar() is deprecated, please use SidebarUI.toggle() or SidebarUI.show() instead",
+ "https://developer.mozilla.org/en-US/Add-ons/Code_snippets/Sidebar");
+
+ if (forceOpen) {
+ SidebarUI.show(commandID);
+ } else {
+ SidebarUI.toggle(commandID);
+ }
+}