Delete the GTK+ port of Chrome.

chrome/browser/ui/gtk/menu_bar_helper.cc

-// Copyright (c) 2011 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/gtk/menu_bar_helper.h"
-
-#include <algorithm>
-
-#include "base/logging.h"
-#include "chrome/browser/ui/gtk/gtk_util.h"
-#include "ui/base/gtk/gtk_signal_registrar.h"
-
-namespace {
-
-// Recursively find all the GtkMenus that are attached to menu item |child|
-// and add them to |data|, which is a vector of GtkWidgets.
-void PopulateSubmenus(GtkWidget* child, gpointer data) {
-  std::vector<GtkWidget*>* submenus =
-      static_cast<std::vector<GtkWidget*>*>(data);
-  GtkWidget* submenu = gtk_menu_item_get_submenu(GTK_MENU_ITEM(child));
-  if (submenu) {
-    submenus->push_back(submenu);
-    gtk_container_foreach(GTK_CONTAINER(submenu), PopulateSubmenus, submenus);
-  }
-}
-
-// Is the cursor over |menu| or one of its parent menus?
-bool MotionIsOverMenu(GtkWidget* menu, GdkEventMotion* motion) {
-  GtkAllocation allocation;
-  gtk_widget_get_allocation(menu, &allocation);
-
-  if (motion->x >= 0 && motion->y >= 0 &&
-      motion->x < allocation.width &&
-      motion->y < allocation.height) {
-    return true;
-  }
-
-  while (menu) {
-    GtkWidget* menu_item = gtk_menu_get_attach_widget(GTK_MENU(menu));
-    if (!menu_item)
-      return false;
-    GtkWidget* parent = gtk_widget_get_parent(menu_item);
-
-    if (gtk_util::WidgetContainsCursor(parent))
-      return true;
-    menu = parent;
-  }
-
-  return false;
-}
-
-}  // namespace
-
-MenuBarHelper::MenuBarHelper(Delegate* delegate)
-    : button_showing_menu_(NULL),
-      showing_menu_(NULL),
-      delegate_(delegate) {
-  DCHECK(delegate_);
-}
-
-MenuBarHelper::~MenuBarHelper() {
-}
-
-void MenuBarHelper::Add(GtkWidget* button) {
-  buttons_.push_back(button);
-}
-
-void MenuBarHelper::Remove(GtkWidget* button) {
-  std::vector<GtkWidget*>::iterator iter =
-      find(buttons_.begin(), buttons_.end(), button);
-  if (iter == buttons_.end()) {
-    NOTREACHED();
-    return;
-  }
-  buttons_.erase(iter);
-}
-
-void MenuBarHelper::Clear() {
-  buttons_.clear();
-}
-
-void MenuBarHelper::MenuStartedShowing(GtkWidget* button, GtkWidget* menu) {
-  DCHECK(GTK_IS_MENU(menu));
-  button_showing_menu_ = button;
-  showing_menu_ = menu;
-
-  signal_handlers_.reset(new ui::GtkSignalRegistrar());
-  signal_handlers_->Connect(menu, "destroy",
-                            G_CALLBACK(OnMenuHiddenOrDestroyedThunk), this);
-  signal_handlers_->Connect(menu, "hide",
-                            G_CALLBACK(OnMenuHiddenOrDestroyedThunk), this);
-  signal_handlers_->Connect(menu, "motion-notify-event",
-                            G_CALLBACK(OnMenuMotionNotifyThunk), this);
-  signal_handlers_->Connect(menu, "move-current",
-                            G_CALLBACK(OnMenuMoveCurrentThunk), this);
-  gtk_container_foreach(GTK_CONTAINER(menu), PopulateSubmenus, &submenus_);
-
-  for (size_t i = 0; i < submenus_.size(); ++i) {
-    signal_handlers_->Connect(submenus_[i], "motion-notify-event",
-                              G_CALLBACK(OnMenuMotionNotifyThunk), this);
-  }
-}
-
-gboolean MenuBarHelper::OnMenuMotionNotify(GtkWidget* menu,
-                                           GdkEventMotion* motion) {
-  // Don't do anything if pointer is in the menu.
-  if (MotionIsOverMenu(menu, motion))
-    return FALSE;
-  if (buttons_.empty())
-    return FALSE;
-
-  gint x = 0;
-  gint y = 0;
-  GtkWidget* last_button = NULL;
-
-  for (size_t i = 0; i < buttons_.size(); ++i) {
-    GtkWidget* button = buttons_[i];
-    // Figure out coordinates relative to this button. Avoid using
-    // gtk_widget_get_pointer() unnecessarily.
-    if (i == 0) {
-      // We have to make this call because the menu is a popup window, so it
-      // doesn't share a toplevel with the buttons and we can't just use
-      // gtk_widget_translate_coordinates().
-      gtk_widget_get_pointer(buttons_[0], &x, &y);
-    } else {
-      gint last_x = x;
-      gint last_y = y;
-      if (!gtk_widget_translate_coordinates(
-          last_button, button, last_x, last_y, &x, &y)) {
-        // |button| may not be realized.
-        continue;
-      }
-    }
-
-    last_button = button;
-
-    GtkAllocation allocation;
-    gtk_widget_get_allocation(button, &allocation);
-
-    if (x >= 0 && y >= 0 && x < allocation.width && y < allocation.height) {
-      if (button != button_showing_menu_)
-        delegate_->PopupForButton(button);
-      return TRUE;
-    }
-  }
-
-  return FALSE;
-}
-
-void MenuBarHelper::OnMenuHiddenOrDestroyed(GtkWidget* menu) {
-  DCHECK_EQ(showing_menu_, menu);
-
-  signal_handlers_.reset();
-  showing_menu_ = NULL;
-  button_showing_menu_ = NULL;
-  submenus_.clear();
-}
-
-void MenuBarHelper::OnMenuMoveCurrent(GtkWidget* menu,
-                                      GtkMenuDirectionType dir) {
-  // The menu directions are triggered by the arrow keys as follows
-  //
-  //   PARENT   left
-  //   CHILD    right
-  //   NEXT     down
-  //   PREV     up
-  //
-  // We only care about left and right. Note that for RTL, they are swapped.
-  switch (dir) {
-    case GTK_MENU_DIR_CHILD: {
-      GtkWidget* active_item = GTK_MENU_SHELL(menu)->active_menu_item;
-      // The move is going to open a submenu; don't override default behavior.
-      if (active_item && gtk_menu_item_get_submenu(GTK_MENU_ITEM(active_item)))
-        return;
-      // Fall through.
-    }
-    case GTK_MENU_DIR_PARENT: {
-      delegate_->PopupForButtonNextTo(button_showing_menu_, dir);
-      break;
-    }
-    default:
-      return;
-  }
-
-  // This signal doesn't have a return value; we have to manually stop its
-  // propagation.
-  g_signal_stop_emission_by_name(menu, "move-current");
-}