Gtk3 ui: Add libgtk3ui as a separate build component

chrome/browser/ui/libgtk2ui/gtk2_key_bindings_handler.h

-// 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.
-
-#ifndef CHROME_BROWSER_UI_LIBGTK2UI_GTK2_KEY_BINDINGS_HANDLER_H_
-#define CHROME_BROWSER_UI_LIBGTK2UI_GTK2_KEY_BINDINGS_HANDLER_H_
-
-#include <gtk/gtk.h>
-
-#include <string>
-#include <vector>
-
-#include "base/event_types.h"
-#include "ui/base/ime/linux/text_edit_command_auralinux.h"
-
-namespace content {
-struct NativeWebKeyboardEvent;
-}
-
-namespace ui {
-class Event;
-}
-
-namespace libgtk2ui {
-
-// This class is a convenience class for handling editor key bindings defined
-// in gtk keyboard theme.
-// In gtk, only GtkEntry and GtkTextView support customizing editor key bindings
-// through keyboard theme. And in gtk keyboard theme definition file, each key
-// binding must be bound to a specific class or object. So existing keyboard
-// themes only define editor key bindings exactly for GtkEntry and GtkTextView.
-// Then, the only way for us to intercept editor key bindings defined in
-// keyboard theme, is to create a GtkEntry or GtkTextView object and call
-// gtk_bindings_activate_event() against it for the key events. If a key event
-// matches a predefined key binding, corresponding signal will be emitted.
-// GtkTextView is used here because it supports more key bindings than GtkEntry,
-// but in order to minimize the side effect of using a GtkTextView object, a new
-// class derived from GtkTextView is used, which overrides all signals related
-// to key bindings, to make sure GtkTextView won't receive them.
-//
-// See third_party/WebKit/Source/WebCore/editing/EditorCommand.cpp for detailed
-// definition of webkit edit commands.
-// See webkit/glue/editor_client_impl.cc for key bindings predefined in our
-// webkit glue.
-class Gtk2KeyBindingsHandler {
- public:
-  Gtk2KeyBindingsHandler();
-  virtual ~Gtk2KeyBindingsHandler();
-
-  // Matches a key event against predefined gtk key bindings, false will be
-  // returned if the key event doesn't correspond to a predefined key binding.
-  // Edit commands matched with |event| will be stored in |edit_commands|, if
-  // non-NULL.
-  bool MatchEvent(const ui::Event& event,
-                  std::vector<ui::TextEditCommandAuraLinux>* commands);
-
- private:
-  // Object structure of Handler class, which is derived from GtkTextView.
-  struct Handler {
-    GtkTextView parent_object;
-    Gtk2KeyBindingsHandler *owner;
-  };
-
-  // Class structure of Handler class.
-  struct HandlerClass {
-    GtkTextViewClass parent_class;
-  };
-
-  // Creates a new instance of Handler class.
-  GtkWidget* CreateNewHandler();
-
-  // Adds an edit command to the key event.
-  void EditCommandMatched(ui::TextEditCommand command,
-                          const std::string& value);
-
-  // Builds a fake GdkEventKey from an XEvent.
-  void BuildGdkEventKeyFromXEvent(const base::NativeEvent& xevent,
-                                  GdkEventKey* gdk_event);
-
-  // Initializes Handler structure.
-  static void HandlerInit(Handler *self);
-
-  // Initializes HandlerClass structure.
-  static void HandlerClassInit(HandlerClass *klass);
-
-  // Registeres Handler class to GObject type system and return its type id.
-  static GType HandlerGetType();
-
-  // Gets the Gtk2KeyBindingsHandler object which owns the Handler object.
-  static Gtk2KeyBindingsHandler* GetHandlerOwner(GtkTextView* text_view);
-
-  // Handler of "backspace" signal.
-  static void BackSpace(GtkTextView* text_view);
-
-  // Handler of "copy-clipboard" signal.
-  static void CopyClipboard(GtkTextView* text_view);
-
-  // Handler of "cut-clipboard" signal.
-  static void CutClipboard(GtkTextView* text_view);
-
-  // Handler of "delete-from-cursor" signal.
-  static void DeleteFromCursor(GtkTextView* text_view, GtkDeleteType type,
-                               gint count);
-
-  // Handler of "insert-at-cursor" signal.
-  static void InsertAtCursor(GtkTextView* text_view, const gchar* str);
-
-  // Handler of "move-cursor" signal.
-  static void MoveCursor(GtkTextView* text_view, GtkMovementStep step,
-                         gint count, gboolean extend_selection);
-
-  // Handler of "move-viewport" signal.
-  static void MoveViewport(GtkTextView* text_view, GtkScrollStep step,
-                           gint count);
-
-  // Handler of "paste-clipboard" signal.
-  static void PasteClipboard(GtkTextView* text_view);
-
-  // Handler of "select-all" signal.
-  static void SelectAll(GtkTextView* text_view, gboolean select);
-
-  // Handler of "set-anchor" signal.
-  static void SetAnchor(GtkTextView* text_view);
-
-  // Handler of "toggle-cursor-visible" signal.
-  static void ToggleCursorVisible(GtkTextView* text_view);
-
-  // Handler of "toggle-overwrite" signal.
-  static void ToggleOverwrite(GtkTextView* text_view);
-
-  // Handler of "show-help" signal.
-  static gboolean ShowHelp(GtkWidget* widget, GtkWidgetHelpType arg1);
-
-  // Handler of "move-focus" signal.
-  static void MoveFocus(GtkWidget* widget, GtkDirectionType arg1);
-
-  GtkWidget* fake_window_;
-  GtkWidget* handler_;
-
-  // Buffer to store the match results.
-  std::vector<ui::TextEditCommandAuraLinux> edit_commands_;
-
-  // Whether the current X server has the XKeyboard extension.
-  bool has_xkb_;
-};
-
-}  // namespace libgtk2ui
-
-#endif  // CHROME_BROWSER_UI_LIBGTK2UI_GTK2_KEY_BINDINGS_HANDLER_H_