Support chrome.windows extension API events for browserless Panels.

chrome/browser/extensions/extension_panel_event_router.cc

Index: chrome/browser/extensions/extension_panel_event_router.cc
diff --git a/chrome/browser/extensions/extension_panel_event_router.cc b/chrome/browser/extensions/extension_panel_event_router.cc
new file mode 100644
index 0000000000000000000000000000000000000000..f1cf9a1c75ae5aed975458b16f5dcb05134dfdf1
--- /dev/null
+++ b/chrome/browser/extensions/extension_panel_event_router.cc
@@ -0,0 +1,142 @@
+// Copyright (c) 2012 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "chrome/browser/extensions/extension_panel_event_router.h"
+
+#include "base/command_line.h"
+#include "base/json/json_writer.h"
+#include "base/values.h"
+#include "chrome/browser/extensions/extension_event_names.h"
+#include "chrome/browser/extensions/extension_event_router.h"
+#include "chrome/browser/extensions/extension_window_controller.h"
+#include "chrome/browser/profiles/profile.h"
+#include "chrome/browser/ui/panels/panel.h"
+#include "chrome/common/chrome_notification_types.h"
+#include "chrome/common/chrome_switches.h"
+#include "chrome/common/extensions/extension.h"
+#include "chrome/common/extensions/extension_constants.h"
+#include "content/public/browser/notification_service.h"
+
+ExtensionPanelEventRouter::ExtensionPanelEventRouter(Profile* profile)
+    : initialized_(false),
+      profile_(profile),
+      focused_profile_(NULL),
+      focused_window_id_(extension_misc::kUnknownWindowId) {
+}
+
+ExtensionPanelEventRouter::~ExtensionPanelEventRouter() {
+}
+
+void ExtensionPanelEventRouter::Init() {
+  if (initialized_ || !CommandLine::ForCurrentProcess()->HasSwitch(
+          switches::kBrowserlessPanels))
+    return;
+
+  registrar_.Add(this, chrome::NOTIFICATION_PANEL_OPENED,
+                 content::NotificationService::AllSources());
+  registrar_.Add(this, chrome::NOTIFICATION_PANEL_CHANGED_ACTIVE_STATUS,
+                 content::NotificationService::AllSources());
+  registrar_.Add(this, chrome::NOTIFICATION_PANEL_CLOSED,
+                 content::NotificationService::AllSources());
+  initialized_ = true;
+}
+
+void ExtensionPanelEventRouter::Observe(
+    int type,
+    const content::NotificationSource& source,
+    const content::NotificationDetails& details) {
+  Panel* panel = content::Source<Panel>(source).ptr();
+  switch (type) {
+    case chrome::NOTIFICATION_PANEL_OPENED:
+      OnPanelOpened(panel);
+      break;
+    case chrome::NOTIFICATION_PANEL_CHANGED_ACTIVE_STATUS: {
+      bool* is_active_now = content::Details<bool>(details).ptr();
+      OnPanelActiveStatusChanged(panel, *is_active_now);
+      break;
+    }
+    case chrome::NOTIFICATION_PANEL_CLOSED:
+      OnPanelClosed(panel);
+      break;
+    default:
+      NOTREACHED();
+      break;
+  }
+}
+
+void ExtensionPanelEventRouter::OnPanelOpened(Panel* panel) {
+  if (!profile_->GetExtensionEventRouter())
+    return;
+
+  ListValue args;
+  DCHECK(panel->extension_window_controller());
+  DictionaryValue* window_dictionary =
+      panel->extension_window_controller()->CreateWindowValue();
+  args.Append(window_dictionary);
+
+  std::string json_args;
+  base::JSONWriter::Write(&args, &json_args);
+  profile_->GetExtensionEventRouter()->DispatchEventToRenderers(
+      extension_event_names::kOnWindowCreated, json_args, profile_, GURL());

[jianli, 2012/07/13 17:46:41]

Can you share the above code with the similar one in OnPanelClosed, i.e., by
introducing a helper function DispatchSimpleEvent?

[jennb, 2012/07/13 22:12:14]

Done.

+}
+
+void ExtensionPanelEventRouter::OnPanelActiveStatusChanged(
+    Panel* panel, bool is_active_now) {
+  Profile* window_profile = NULL;
+  int window_id = extension_misc::kUnknownWindowId;
+  if (is_active_now) {
+    window_profile = panel->profile();
+    window_id = panel->extension_window_controller()->GetWindowId();
+  }
+
+  if (focused_window_id_ == window_id)
+    return;
+
+  // window_profile is either this profile's default profile, its
+  // incognito profile, or NULL iff this profile is losing focus.
+  Profile* previous_focused_profile = focused_profile_;
+  focused_profile_ = window_profile;
+  focused_window_id_ = window_id;
+
+  ListValue real_args;
+  real_args.Append(Value::CreateIntegerValue(window_id));
+  std::string real_json_args;
+  base::JSONWriter::Write(&real_args, &real_json_args);
+
+  // When switching between windows in the default and incognito profiles,
+  // dispatch WINDOW_ID_NONE to extensions whose profile lost focus that
+  // can't see the new focused window across the incognito boundary.
+  // See crbug.com/46610.
+  std::string none_json_args;
+  if (focused_profile_ != NULL && previous_focused_profile != NULL &&
+      focused_profile_ != previous_focused_profile) {
+    ListValue none_args;
+    none_args.Append(
+        Value::CreateIntegerValue(extension_misc::kUnknownWindowId));
+    base::JSONWriter::Write(&none_args, &none_json_args);
+  }
+
+  if (!window_profile)
+    window_profile = previous_focused_profile;
+  if (!window_profile->GetExtensionEventRouter())
+    return;
+  window_profile->GetExtensionEventRouter()->
+      DispatchEventsToRenderersAcrossIncognito(
+          extension_event_names::kOnWindowFocusedChanged, real_json_args,
+          window_profile, none_json_args, GURL());
+}
+
+void ExtensionPanelEventRouter::OnPanelClosed(Panel* panel) {
+  if (!profile_->GetExtensionEventRouter())
+    return;
+
+  int window_id = panel->extension_window_controller()->GetWindowId();
+  ListValue args;
+  args.Append(Value::CreateIntegerValue(window_id));
+
+  std::string json_args;
+  base::JSONWriter::Write(&args, &json_args);
+  profile_->GetExtensionEventRouter()->DispatchEventToRenderers(
+      extension_event_names::kOnWindowRemoved, json_args, profile_, GURL());
+}