1 files changed, 186 insertions, 0 deletions
diff --git a/devtools/client/webconsole/browser-console-manager.js b/devtools/client/webconsole/browser-console-manager.js
new file mode 100644
index 0000000000..b38391f685
--- /dev/null
+++ b/devtools/client/webconsole/browser-console-manager.js
@@ -0,0 +1,186 @@
+/* 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/. */
+
+"use strict";
+
+const {
+  CommandsFactory,
+} = require("resource://devtools/shared/commands/commands-factory.js");
+
+loader.lazyRequireGetter(
+  this,
+  "Tools",
+  "resource://devtools/client/definitions.js",
+  true
+);
+loader.lazyRequireGetter(
+  this,
+  "l10n",
+  "resource://devtools/client/webconsole/utils/l10n.js"
+);
+loader.lazyRequireGetter(
+  this,
+  "BrowserConsole",
+  "resource://devtools/client/webconsole/browser-console.js"
+);
+
+const BC_WINDOW_FEATURES =
+  "chrome,titlebar,toolbar,centerscreen,resizable,dialog=no";
+
+class BrowserConsoleManager {
+  constructor() {
+    this._browserConsole = null;
+    this._browserConsoleInitializing = null;
+    this._browerConsoleSessionState = false;
+  }
+
+  storeBrowserConsoleSessionState() {
+    this._browerConsoleSessionState = !!this.getBrowserConsole();
+  }
+
+  getBrowserConsoleSessionState() {
+    return this._browerConsoleSessionState;
+  }
+
+  /**
+   * Open a Browser Console for the current commands context.
+   *
+   * @param nsIDOMWindow iframeWindow
+   *        The window where the browser console UI is already loaded.
+   * @return object
+   *         A promise object for the opening of the new BrowserConsole instance.
+   */
+  async openBrowserConsole(win) {
+    const hud = new BrowserConsole(this.commands, win, win);
+    this._browserConsole = hud;
+    await hud.init();
+    return hud;
+  }
+
+  /**
+   * Close the opened Browser Console
+   */
+  async closeBrowserConsole() {
+    if (!this._browserConsole) {
+      return;
+    }
+
+    // Ensure destroying the commands,
+    // even if the console throws during cleanup.
+    try {
+      await this._browserConsole.destroy();
+    } catch (e) {
+      console.error(e);
+    }
+    this._browserConsole = null;
+
+    await this.commands.destroy();
+    this.commands = null;
+  }
+
+  /**
+   * Toggle the Browser Console.
+   */
+  async toggleBrowserConsole() {
+    if (this._browserConsole) {
+      return this.closeBrowserConsole();
+    }
+
+    if (this._browserConsoleInitializing) {
+      return this._browserConsoleInitializing;
+    }
+
+    // Temporarily cache the async startup sequence so that if toggleBrowserConsole
+    // gets called again we can return this console instead of opening another one.
+    this._browserConsoleInitializing = (async () => {
+      this.commands = await CommandsFactory.forBrowserConsole();
+      const win = await this.openWindow();
+      const browserConsole = await this.openBrowserConsole(win);
+      return browserConsole;
+    })();
+
+    try {
+      const browserConsole = await this._browserConsoleInitializing;
+      this._browserConsoleInitializing = null;
+      return browserConsole;
+    } catch (e) {
+      // Ensure always clearing this field, even in case of exception,
+      // which may happen when closing during initialization.
+      this._browserConsoleInitializing = null;
+      throw e;
+    }
+  }
+
+  async openWindow() {
+    const win = Services.ww.openWindow(
+      null,
+      Tools.webConsole.url,
+      "_blank",
+      BC_WINDOW_FEATURES,
+      null
+    );
+
+    await new Promise(resolve => {
+      win.addEventListener("DOMContentLoaded", resolve, { once: true });
+    });
+
+    // It's important to declare the unload *after* the initial "DOMContentLoaded",
+    // otherwise, since the window is navigated to Tools.webConsole.url, an unload event
+    // is fired.
+    win.addEventListener("unload", this.closeBrowserConsole.bind(this), {
+      once: true,
+    });
+
+    this.updateWindowTitle(win);
+    return win;
+  }
+
+  /**
+   * Opens or focuses the Browser Console.
+   */
+  openBrowserConsoleOrFocus() {
+    const hud = this.getBrowserConsole();
+    if (hud) {
+      hud.iframeWindow.focus();
+      return Promise.resolve(hud);
+    }
+
+    return this.toggleBrowserConsole();
+  }
+
+  /**
+   * Get the Browser Console instance, if open.
+   *
+   * @return object|null
+   *         A BrowserConsole instance or null if the Browser Console is not
+   *         open.
+   */
+  getBrowserConsole() {
+    return this._browserConsole;
+  }
+
+  /**
+   * Set the title of the Browser Console window.
+   *
+   * @param {Window} win: The BrowserConsole window
+   */
+  updateWindowTitle(win) {
+    let title;
+    const mode = Services.prefs.getCharPref(
+      "devtools.browsertoolbox.scope",
+      null
+    );
+    if (mode == "everything") {
+      title = l10n.getStr("multiProcessBrowserConsole.title");
+    } else if (mode == "parent-process") {
+      title = l10n.getStr("parentProcessBrowserConsole.title");
+    } else {
+      throw new Error("Unsupported mode: " + mode);
+    }
+
+    win.document.title = title;
+  }
+}
+
+exports.BrowserConsoleManager = new BrowserConsoleManager();