DevTools - Browser Console - restore sessions

https://github.com/MoonchildProductions/moebius/pull/112

devtools/client/webconsole/hudservice.js

@@ -51,6 +51,23 @@ HUD_SERVICE.prototype =
    */
   consoles: null,
 
+  _browerConsoleSessionState: false,
+  storeBrowserConsoleSessionState() {
+    this._browerConsoleSessionState = !!this.getBrowserConsole();
+  },
+  getBrowserConsoleSessionState() {
+    return this._browerConsoleSessionState;
+  },
+
+  /**
+   * Restore the Browser Console as provided by SessionStore.
+   */
+  restoreBrowserConsoleSession: function HS_restoreBrowserConsoleSession() {
+    if (!HUDService.getBrowserConsole()) {
+      HUDService.toggleBrowserConsole();
+    }
+  },
+
   /**
    * Assign a function to this property to listen for every request that
    * completes. Used by unit tests. The callback takes one argument: the HTTP
@@ -647,6 +664,9 @@ BrowserConsole.prototype = extend(WebConsole.prototype, {
       return this._bc_init;
     }
 
+    // Only add the shutdown observer if we've opened a Browser Console window.
+    ShutdownObserver.init();
+
     this.ui._filterPrefsPrefix = BROWSER_CONSOLE_FILTER_PREFS_PREFIX;
 
     let window = this.iframeWindow;
@@ -702,17 +722,32 @@ BrowserConsole.prototype = extend(WebConsole.prototype, {
   },
 });
 
-const HUDService = new HUD_SERVICE();
+exports.HUDService = HUDService;
 
-(() => {
-  let methods = ["openWebConsole", "openBrowserConsole",
-                 "toggleBrowserConsole", "getOpenWebConsole",
-                 "getBrowserConsole", "getHudByWindow",
-                 "openBrowserConsoleOrFocus", "getHudReferenceById"];
-  for (let method of methods) {
-    exports[method] = HUDService[method].bind(HUDService);
+/**
+ * The ShutdownObserver listens for app shutdown and saves the current state
+ * of the Browser Console for session restore.
+ */
+var ShutdownObserver = {
+  _initialized: false,
+  init() {
+    if (this._initialized) {
+      return;
+    }
+
+    Services.obs.addObserver(this, "quit-application-granted", false);
+
+    this._initialized = true;
+  },
+
+  observe(message, topic) {
+    if (topic == "quit-application-granted") {
+      HUDService.storeBrowserConsoleSessionState();
+      this.uninit();
+    }
+  },
+
+  uninit() {
+    Services.obs.removeObserver(this, "quit-application-granted");
   }
-
-  exports.consoles = HUDService.consoles;
-  exports.lastFinishedRequest = HUDService.lastFinishedRequest;
-})();
+};

devtools/client/webconsole/panel.js

@@ -8,7 +8,7 @@
 
 const promise = require("promise");
 
-loader.lazyGetter(this, "HUDService", () => require("devtools/client/webconsole/hudservice"));
+loader.lazyRequireGetter(this, "HUDService", "devtools/client/webconsole/hudservice", true);
 loader.lazyGetter(this, "EventEmitter", () => require("devtools/shared/event-emitter"));
 
 /**

devtools/client/webconsole/test/browser.ini

@@ -182,6 +182,7 @@ subsuite = clipboard
 [browser_console_optimized_out_vars.js]
 [browser_console_private_browsing.js]
 skip-if = e10s # Bug 1042253 - webconsole e10s tests
+[browser_console_restore.js]
 [browser_console_server_logging.js]
 [browser_console_variables_view.js]
 [browser_console_variables_view_filter.js]

devtools/client/webconsole/test/browser_console.js

@@ -22,7 +22,7 @@ const TEST_IMAGE = "http://example.com/browser/devtools/client/webconsole/" +
 add_task(function* () {
   yield loadTab(TEST_URI);
 
-  let opened = waitForConsole();
+  let opened = waitForBrowserConsole();
 
   let hud = HUDService.getBrowserConsole();
   ok(!hud, "browser console is not open");
@@ -141,20 +141,3 @@ function consoleOpened(hud) {
     ],
   });
 }
-
-function waitForConsole() {
-  let deferred = promise.defer();
-
-  Services.obs.addObserver(function observer(aSubject) {
-    Services.obs.removeObserver(observer, "web-console-created");
-    aSubject.QueryInterface(Ci.nsISupportsString);
-
-    let hud = HUDService.getBrowserConsole();
-    ok(hud, "browser console is open");
-    is(aSubject.data, hud.hudId, "notification hudId is correct");
-
-    executeSoon(() => deferred.resolve(hud));
-  }, "web-console-created", false);
-
-  return deferred.promise;
-}

devtools/client/webconsole/test/browser_console_restore.js

@@ -0,0 +1,30 @@
+/* -*- indent-tabs-mode: nil; js-indent-level: 2 -*- */
+/* vim: set ft=javascript ts=2 et sw=2 tw=80: */
+/* Any copyright is dedicated to the Public Domain.
+ * http://creativecommons.org/publicdomain/zero/1.0/ */
+
+// Check that the browser console gets session state is set correctly, and that
+// it re-opens when restore is requested.
+
+"use strict";
+
+add_task(function* () {
+  is(HUDService.getBrowserConsoleSessionState(), false, "Session state false by default");
+  HUDService.storeBrowserConsoleSessionState();
+  is(HUDService.getBrowserConsoleSessionState(), false,
+    "Session state still not true even after setting (since Browser Console is closed)");
+
+  yield HUDService.toggleBrowserConsole();
+  HUDService.storeBrowserConsoleSessionState();
+  is(HUDService.getBrowserConsoleSessionState(), true,
+    "Session state true (since Browser Console is opened)");
+
+  info("Closing the browser console and waiting for the session restore to reopen it")
+  yield HUDService.toggleBrowserConsole();
+
+  let opened = waitForBrowserConsole();
+  HUDService.restoreBrowserConsoleSession();
+
+  info("Waiting for the console to open after session restore")
+  yield opened;
+});

devtools/client/webconsole/test/head.js

@@ -12,7 +12,7 @@ Services.scriptloader.loadSubScript("chrome://mochitests/content/browser/devtool
 var {Utils: WebConsoleUtils} = require("devtools/client/webconsole/utils");
 var {Messages} = require("devtools/client/webconsole/console-output");
 const asyncStorage = require("devtools/shared/async-storage");
-const HUDService = require("devtools/client/webconsole/hudservice");
+const {HUDService} = require("devtools/client/webconsole/hudservice");
 
 // Services.prefs.setBoolPref("devtools.debugger.log", true);
 
@@ -1842,3 +1842,18 @@ function getRenderedSource(root) {
     column: location.getAttribute("data-column"),
   } : null;
 }
+
+function waitForBrowserConsole() {
+  return new Promise(resolve => {
+    Services.obs.addObserver(function observer(subject) {
+      Services.obs.removeObserver(observer, "web-console-created");
+      subject.QueryInterface(Ci.nsISupportsString);
+
+      let hud = HUDService.getBrowserConsole();
+      ok(hud, "browser console is open");
+      is(subject.data, hud.hudId, "notification hudId is correct");
+
+      executeSoon(() => resolve(hud));
+    }, "web-console-created");
+  });
+}