text: /*
   * Copyright (C) 2011 Igalia S.L.
   *
   * Redistribution and use in source and binary forms, with or without
   * modification, are permitted provided that the following conditions
   * are met:
   * 1. Redistributions of source code must retain the above copyright
   *    notice, this list of conditions and the following disclaimer.
   * 2. Redistributions in binary form must reproduce the above copyright
   *    notice, this list of conditions and the following disclaimer in the
   *    documentation and/or other materials provided with the distribution.
   *
   * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS AS IS''
   * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
   * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
   * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
   * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
   * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
   * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
   * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
   * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
   * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
   * THE POSSIBILITY OF SUCH DAMAGE.
   */
  
  #include "config.h"
  #include "WebContextMenuProxyGtk.h"
  
  #if ENABLE(CONTEXT_MENUS)
  
  #include "APIContextMenuClient.h"
  #include "NativeWebMouseEvent.h"
  #include "WebContextMenuItem.h"
  #include "WebContextMenuItemData.h"
  #include "WebKitWebViewBasePrivate.h"
  #include "WebPageProxy.h"
  #include "WebProcessProxy.h"
  #include <WebCore/GtkUtilities.h>
  #include <gio/gio.h>
  #include <gtk/gtk.h>
  #include <wtf/text/CString.h>
  
  static const char* gContextMenuActionId = "webkit-context-menu-action";
  static const char* gContextMenuTitle = "webkit-context-menu-title";
  static const char* gContextMenuItemGroup = "webkitContextMenu";
  
  namespace WebKit {
  using namespace WebCore;
  
  static void contextMenuItemActivatedCallback(GAction* action, GVariant*, WebPageProxy* page)
  {
      auto* stateType = g_action_get_state_type(action);
      gboolean isToggle = stateType && g_variant_type_equal(stateType, G_VARIANT_TYPE_BOOLEAN);
      GRefPtr<GVariant> state = isToggle ? adoptGRef(g_action_get_state(action)) : nullptr;
      WebContextMenuItemData item(isToggle ? CheckableActionType : ActionType,
          static_cast<ContextMenuAction>(GPOINTER_TO_INT(g_object_get_data(G_OBJECT(action), gContextMenuActionId))),
          String::fromUTF8(static_cast<const char*>(g_object_get_data(G_OBJECT(action), gContextMenuTitle))), g_action_get_enabled(action),
          state ? g_variant_get_boolean(state.get()) : false);
      if (isToggle)
          g_action_change_state(action, g_variant_new_boolean(!g_variant_get_boolean(state.get())));
      page->contextMenuItemSelected(item);
  }
  
  void WebContextMenuProxyGtk::append(GMenu* menu, const WebContextMenuItemGlib& menuItem)
  {
      unsigned long signalHandlerId;
      GRefPtr<GMenuItem> gMenuItem;
      GAction* action = menuItem.gAction();
      ASSERT(action);
  #if GTK_CHECK_VERSION(3, 16, 0)
      g_action_map_add_action(G_ACTION_MAP(gtk_widget_get_action_group(GTK_WIDGET(m_menu), gContextMenuItemGroup)), action);
  #else
      g_action_map_add_action(G_ACTION_MAP(g_object_get_data(G_OBJECT(m_menu), gContextMenuItemGroup)), action);
  #endif
  
      switch (menuItem.type()) {
      case ActionType:
      case CheckableActionType: {
          GUniquePtr<char> actionName(g_strdup_printf("%s.%s", gContextMenuItemGroup, g_action_get_name(action)));
          gMenuItem = adoptGRef(g_menu_item_new(menuItem.title().utf8().data(), nullptr));
          g_menu_item_set_action_and_target_value(gMenuItem.get(), actionName.get(), menuItem.gActionTarget());
  
          if (menuItem.action() < ContextMenuItemBaseApplicationTag) {
              g_object_set_data(G_OBJECT(action), gContextMenuActionId, GINT_TO_POINTER(menuItem.action()));
              g_object_set_data_full(G_OBJECT(action), gContextMenuTitle, g_strdup(menuItem.title().utf8().data()), g_free);
              signalHandlerId = g_signal_connect(action, "activate", G_CALLBACK(contextMenuItemActivatedCallback), m_page);
              m_signalHandlers.set(signalHandlerId, action);
          }
          break;
      }
      case SubmenuType: {
          GRefPtr<GMenu> submenu = buildMenu(menuItem.submenuItems());
          gMenuItem = adoptGRef(g_menu_item_new_submenu(menuItem.title().utf8().data(), G_MENU_MODEL(submenu.get())));
          break;
      }
      case SeparatorType:
          ASSERT_NOT_REACHED();
          break;
      }
  
      g_menu_append_item(menu, gMenuItem.get());
  }
  
  GRefPtr<GMenu> WebContextMenuProxyGtk::buildMenu(const Vector<WebContextMenuItemGlib>& items)
  {
      GRefPtr<GMenu> menu = adoptGRef(g_menu_new());
      GMenu* sectionMenu = menu.get();
      for (const auto& item : items) {
          if (item.type() == SeparatorType) {
              GRefPtr<GMenu> section = adoptGRef(g_menu_new());
              g_menu_append_section(menu.get(), nullptr, G_MENU_MODEL(section.get()));
              sectionMenu = section.get();
          } else
              append(sectionMenu, item);
      }
  
      return menu;
  }
  
  void WebContextMenuProxyGtk::populate(const Vector<WebContextMenuItemGlib>& items)
  {
      GRefPtr<GMenu> menu = buildMenu(items);
      gtk_menu_shell_bind_model(GTK_MENU_SHELL(m_menu), G_MENU_MODEL(menu.get()), nullptr, TRUE);
  }
  
  void WebContextMenuProxyGtk::populate(const Vector<Ref<WebContextMenuItem>>& items)
  {
      GRefPtr<GMenu> menu = adoptGRef(g_menu_new());
      GMenu* sectionMenu = menu.get();
      for (const auto& item : items) {
          if (item->data().type() == SeparatorType) {
              GRefPtr<GMenu> section = adoptGRef(g_menu_new());
              g_menu_append_section(menu.get(), nullptr, G_MENU_MODEL(section.get()));
              sectionMenu = section.get();
          } else {
              WebContextMenuItemGlib menuitem(item->data());
              append(sectionMenu, menuitem);
          }
      }
      gtk_menu_shell_bind_model(GTK_MENU_SHELL(m_menu), G_MENU_MODEL(menu.get()), nullptr, TRUE);
  }
  
  void WebContextMenuProxyGtk::show()
  {
      Vector<Ref<WebContextMenuItem>> proposedAPIItems;
      for (auto& item : m_context.menuItems()) {
          if (item.action() != ContextMenuItemTagShareMenu)
              proposedAPIItems.append(WebContextMenuItem::create(item));
      }
  
      m_page->contextMenuClient().getContextMenuFromProposedMenu(*m_page, WTFMove(proposedAPIItems), WebContextMenuListenerProxy::create(this).get(), m_context.webHitTestResultData(), m_page->process().transformHandlesToObjects(m_userData.object()).get());
  }
  
  void WebContextMenuProxyGtk::showContextMenuWithItems(Vector<Ref<WebContextMenuItem>>&& items)
  {
      if (!items.isEmpty())
          populate(items);
  
      unsigned childCount = 0;
      gtk_container_foreach(GTK_CONTAINER(m_menu), [](GtkWidget*, gpointer data) { (*static_cast<unsigned*>(data))++; }, &childCount);
      if (!childCount)
          return;
  
      m_popupPosition = convertWidgetPointToScreenPoint(m_webView, m_context.menuLocation());
  
      // Display menu initiated by right click (mouse button pressed = 3).
      NativeWebMouseEvent* mouseEvent = m_page->currentlyProcessedMouseDownEvent();
      const GdkEvent* event = mouseEvent ? mouseEvent->nativeEvent() : 0;
      gtk_menu_attach_to_widget(m_menu, GTK_WIDGET(m_webView), nullptr);
      gtk_menu_popup(m_menu, nullptr, nullptr, reinterpret_cast<GtkMenuPositionFunc>(menuPositionFunction), this, event ? event->button.button : 3, event ? event->button.time : GDK_CURRENT_TIME);
  }
  
  WebContextMenuProxyGtk::WebContextMenuProxyGtk(GtkWidget* webView, WebPageProxy& page, ContextMenuContextData&& context, const UserData& userData)
      : WebContextMenuProxy(WTFMove(context), userData)
      , m_webView(webView)
      , m_page(&page)
      , m_menu(GTK_MENU(gtk_menu_new()))
  {
      GRefPtr<GSimpleActionGroup> group = adoptGRef(g_simple_action_group_new());
      gtk_widget_insert_action_group(GTK_WIDGET(m_menu), gContextMenuItemGroup, G_ACTION_GROUP(group.get()));
  #if !GTK_CHECK_VERSION(3, 16, 0)
      g_object_set_data(G_OBJECT(m_menu), gContextMenuItemGroup, group.get());
  #endif
      webkitWebViewBaseSetActiveContextMenuProxy(WEBKIT_WEB_VIEW_BASE(m_webView), this);
  }
  
  WebContextMenuProxyGtk::~WebContextMenuProxyGtk()
  {
      gtk_menu_popdown(m_menu);
  
      for (auto& handler : m_signalHandlers)
          g_signal_handler_disconnect(handler.value, handler.key);
      m_signalHandlers.clear();
  
      gtk_widget_insert_action_group(GTK_WIDGET(m_menu), gContextMenuItemGroup, nullptr);
  #if !GTK_CHECK_VERSION(3, 16, 0)
      g_object_set_data(G_OBJECT(m_menu), gContextMenuItemGroup, nullptr);
  #endif
      gtk_widget_destroy(GTK_WIDGET(m_menu));
  }
  
  void WebContextMenuProxyGtk::menuPositionFunction(GtkMenu* menu, gint* x, gint* y, gboolean* pushIn, WebContextMenuProxyGtk* popupMenu)
  {
      GtkRequisition menuSize;
      gtk_widget_get_preferred_size(GTK_WIDGET(menu), &menuSize, 0);
  
      GdkScreen* screen = gtk_widget_get_screen(popupMenu->m_webView);
      *x = popupMenu->m_popupPosition.x();
      if ((*x + menuSize.width) >= gdk_screen_get_width(screen))
          *x -= menuSize.width;
  
      *y = popupMenu->m_popupPosition.y();
      if ((*y + menuSize.height) >= gdk_screen_get_height(screen))
          *y -= menuSize.height;
  
      *pushIn = FALSE;
  }
  
  } // namespace WebKit
  #endif // ENABLE(CONTEXT_MENUS)
  