Fall back to X11 system tray icons if libappindicator is not available

chrome/browser/ui/libgtk2ui/app_indicator_icon_menu.cc

+// Copyright 2014 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/ui/libgtk2ui/app_indicator_icon_menu.h"
+
+#include <gtk/gtk.h>
+
+#include "base/bind.h"
+#include "chrome/browser/ui/libgtk2ui/menu_util.h"
+#include "ui/base/models/menu_model.h"
+
+namespace libgtk2ui {
+
+AppIndicatorIconMenu::AppIndicatorIconMenu(ui::MenuModel* model)
+    : menu_model_(model),
+      click_action_replacement_menu_item_added_(false),
+      gtk_menu_(gtk_menu_new()),
+      block_activation_(false) {
+  if (menu_model_) {
+    BuildSubmenuFromModel(menu_model_,
+                          gtk_menu_,
+                          G_CALLBACK(OnMenuItemActivatedThunk),
+                          &block_activation_,
+                          this);
+    Refresh();
+  }
+}
+
+AppIndicatorIconMenu::~AppIndicatorIconMenu() {
+  if (gtk_menu_)
+    gtk_widget_destroy(gtk_menu_);
+}
+
+void AppIndicatorIconMenu::UpdateClickActionReplacementMenuItem(
+    const char* label,
+    const base::Closure& callback) {
+  click_action_replacement_callback_ = callback;
+
+  if (click_action_replacement_menu_item_added_) {
+    GList* children = gtk_container_get_children(GTK_CONTAINER(gtk_menu_));
+    for (GList* child = children; child; child = g_list_next(child)) {
+      if (g_object_get_data(G_OBJECT(child->data), "click-action-item") !=
+          NULL) {
+        gtk_menu_item_set_label(GTK_MENU_ITEM(child->data), label);
+        break;
+      }
+    }
+    g_list_free(children);
+  } else {
+    click_action_replacement_menu_item_added_ = true;
+
+    // If |menu_model_| is non empty, add a separator to separate the
+    // "click action replacement menu item" from the other menu items.
+    if (menu_model_ && menu_model_->GetItemCount() > 0) {
+      GtkWidget* menu_item = gtk_separator_menu_item_new();
+      gtk_widget_show(menu_item);
+      gtk_menu_shell_prepend(GTK_MENU_SHELL(gtk_menu_), menu_item);
+    }
+
+    GtkWidget* menu_item = gtk_menu_item_new_with_mnemonic(label);
+    g_object_set_data(
+        G_OBJECT(menu_item), "click-action-item", GINT_TO_POINTER(1));
+    g_signal_connect(menu_item,
+                     "activate",
+                     G_CALLBACK(OnClickActionReplacementMenuItemActivatedThunk),
+                     this);
+    gtk_widget_show(menu_item);
+    gtk_menu_shell_prepend(GTK_MENU_SHELL(gtk_menu_), menu_item);
+  }
+}
+
+void AppIndicatorIconMenu::Refresh() {
+  gtk_container_foreach(
+      GTK_CONTAINER(gtk_menu_), SetMenuItemInfo, &block_activation_);
+}
+
+GtkMenu* AppIndicatorIconMenu::GetGtkMenu() {
+  return GTK_MENU(gtk_menu_);
+}
+
+
+void AppIndicatorIconMenu::OnClickActionReplacementMenuItemActivated(
+    GtkWidget* menu_item) {
+  click_action_replacement_callback_.Run();
+}
+
+void AppIndicatorIconMenu::OnMenuItemActivated(GtkWidget* menu_item) {
+  if (block_activation_)
+    return;
+
+  ui::MenuModel* model = ModelForMenuItem(GTK_MENU_ITEM(menu_item));
+  if (!model) {
+    // There won't be a model for "native" submenus like the "Input Methods"
+    // context menu. We don't need to handle activation messages for submenus
+    // anyway, so we can just return here.
+    DCHECK(gtk_menu_item_get_submenu(GTK_MENU_ITEM(menu_item)));
+    return;
+  }
+
+  // The activate signal is sent to radio items as they get deselected;
+  // ignore it in this case.
+  if (GTK_IS_RADIO_MENU_ITEM(menu_item) &&
+      !gtk_check_menu_item_get_active(GTK_CHECK_MENU_ITEM(menu_item))) {
+    return;
+  }
+
+  int id;
+  if (!GetMenuItemID(menu_item, &id))
+    return;
+
+  // The menu item can still be activated by hotkeys even if it is disabled.
+  if (menu_model_->IsEnabledAt(id))
+    ExecuteCommand(model, id);
+}
+
+}  // namespace libgtk2ui