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| 1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. | |
| 2 // Use of this source code is governed by a BSD-style license that can be | |
| 3 // found in the LICENSE file. | |
| 4 | |
| 5 #ifndef CONTENT_BROWSER_RENDERER_HOST_GTK_KEY_BINDINGS_HANDLER_H_ | |
| 6 #define CONTENT_BROWSER_RENDERER_HOST_GTK_KEY_BINDINGS_HANDLER_H_ | |
| 7 | |
| 8 #include <gtk/gtk.h> | |
| 9 | |
| 10 #include <string> | |
| 11 | |
| 12 #include "content/common/edit_command.h" | |
| 13 #include "content/common/content_export.h" | |
| 14 #include "ui/base/gtk/owned_widget_gtk.h" | |
| 15 | |
| 16 namespace content { | |
| 17 struct NativeWebKeyboardEvent; | |
| 18 | |
| 19 // This class is a convenience class for handling editor key bindings defined | |
| 20 // in gtk keyboard theme. | |
| 21 // In gtk, only GtkEntry and GtkTextView support customizing editor key bindings | |
| 22 // through keyboard theme. And in gtk keyboard theme definition file, each key | |
| 23 // binding must be bound to a specific class or object. So existing keyboard | |
| 24 // themes only define editor key bindings exactly for GtkEntry and GtkTextView. | |
| 25 // Then, the only way for us to intercept editor key bindings defined in | |
| 26 // keyboard theme, is to create a GtkEntry or GtkTextView object and call | |
| 27 // gtk_bindings_activate_event() against it for the key events. If a key event | |
| 28 // matches a predefined key binding, corresponding signal will be emitted. | |
| 29 // GtkTextView is used here because it supports more key bindings than GtkEntry, | |
| 30 // but in order to minimize the side effect of using a GtkTextView object, a new | |
| 31 // class derived from GtkTextView is used, which overrides all signals related | |
| 32 // to key bindings, to make sure GtkTextView won't receive them. | |
| 33 // | |
| 34 // See third_party/WebKit/Source/WebCore/editing/EditorCommand.cpp for detailed | |
| 35 // definition of webkit edit commands. | |
| 36 // See webkit/glue/editor_client_impl.cc for key bindings predefined in our | |
| 37 // webkit glue. | |
| 38 class CONTENT_EXPORT GtkKeyBindingsHandler { | |
| 39 public: | |
| 40 explicit GtkKeyBindingsHandler(GtkWidget* parent_widget); | |
| 41 ~GtkKeyBindingsHandler(); | |
| 42 | |
| 43 // Matches a key event against predefined gtk key bindings, false will be | |
| 44 // returned if the key event doesn't correspond to a predefined key binding. | |
| 45 // Edit commands matched with |wke| will be stored in |edit_commands|. | |
| 46 bool Match(const NativeWebKeyboardEvent& wke, | |
| 47 EditCommands* edit_commands); | |
| 48 | |
| 49 private: | |
| 50 // Object structure of Handler class, which is derived from GtkTextView. | |
| 51 struct Handler { | |
| 52 GtkTextView parent_object; | |
| 53 GtkKeyBindingsHandler *owner; | |
| 54 }; | |
| 55 | |
| 56 // Class structure of Handler class. | |
| 57 struct HandlerClass { | |
| 58 GtkTextViewClass parent_class; | |
| 59 }; | |
| 60 | |
| 61 // Creates a new instance of Handler class. | |
| 62 GtkWidget* CreateNewHandler(); | |
| 63 | |
| 64 // Adds an edit command to the key event. | |
| 65 void EditCommandMatched(const std::string& name, const std::string& value); | |
| 66 | |
| 67 // Initializes Handler structure. | |
| 68 static void HandlerInit(Handler *self); | |
| 69 | |
| 70 // Initializes HandlerClass structure. | |
| 71 static void HandlerClassInit(HandlerClass *klass); | |
| 72 | |
| 73 // Registeres Handler class to GObject type system and return its type id. | |
| 74 static GType HandlerGetType(); | |
| 75 | |
| 76 // Gets the GtkKeyBindingsHandler object which owns the Handler object. | |
| 77 static GtkKeyBindingsHandler* GetHandlerOwner(GtkTextView* text_view); | |
| 78 | |
| 79 // Handler of "backspace" signal. | |
| 80 static void BackSpace(GtkTextView* text_view); | |
| 81 | |
| 82 // Handler of "copy-clipboard" signal. | |
| 83 static void CopyClipboard(GtkTextView* text_view); | |
| 84 | |
| 85 // Handler of "cut-clipboard" signal. | |
| 86 static void CutClipboard(GtkTextView* text_view); | |
| 87 | |
| 88 // Handler of "delete-from-cursor" signal. | |
| 89 static void DeleteFromCursor(GtkTextView* text_view, GtkDeleteType type, | |
| 90 gint count); | |
| 91 | |
| 92 // Handler of "insert-at-cursor" signal. | |
| 93 static void InsertAtCursor(GtkTextView* text_view, const gchar* str); | |
| 94 | |
| 95 // Handler of "move-cursor" signal. | |
| 96 static void MoveCursor(GtkTextView* text_view, GtkMovementStep step, | |
| 97 gint count, gboolean extend_selection); | |
| 98 | |
| 99 // Handler of "move-viewport" signal. | |
| 100 static void MoveViewport(GtkTextView* text_view, GtkScrollStep step, | |
| 101 gint count); | |
| 102 | |
| 103 // Handler of "paste-clipboard" signal. | |
| 104 static void PasteClipboard(GtkTextView* text_view); | |
| 105 | |
| 106 // Handler of "select-all" signal. | |
| 107 static void SelectAll(GtkTextView* text_view, gboolean select); | |
| 108 | |
| 109 // Handler of "set-anchor" signal. | |
| 110 static void SetAnchor(GtkTextView* text_view); | |
| 111 | |
| 112 // Handler of "toggle-cursor-visible" signal. | |
| 113 static void ToggleCursorVisible(GtkTextView* text_view); | |
| 114 | |
| 115 // Handler of "toggle-overwrite" signal. | |
| 116 static void ToggleOverwrite(GtkTextView* text_view); | |
| 117 | |
| 118 // Handler of "show-help" signal. | |
| 119 static gboolean ShowHelp(GtkWidget* widget, GtkWidgetHelpType arg1); | |
| 120 | |
| 121 // Handler of "move-focus" signal. | |
| 122 static void MoveFocus(GtkWidget* widget, GtkDirectionType arg1); | |
| 123 | |
| 124 ui::OwnedWidgetGtk handler_; | |
| 125 | |
| 126 // Buffer to store the match results. | |
| 127 EditCommands edit_commands_; | |
| 128 }; | |
| 129 | |
| 130 } // namespace content | |
| 131 | |
| 132 #endif // CONTENT_BROWSER_RENDERER_HOST_GTK_KEY_BINDINGS_HANDLER_H_ | |
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Chromium Code Reviews
Issue 231733005:
Delete the GTK+ port of Chrome. (Closed)
Base URL: svn://svn.chromium.org/chrome/trunk/src