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1 // Copyright 2013 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 CHROME_BROWSER_UI_LIBGTKUI_X11_INPUT_METHOD_CONTEXT_IMPL_GTK2_H_ | |
6 #define CHROME_BROWSER_UI_LIBGTKUI_X11_INPUT_METHOD_CONTEXT_IMPL_GTK2_H_ | |
7 | |
8 #include <vector> | |
9 | |
10 #include "base/containers/hash_tables.h" | |
11 #include "base/event_types.h" | |
12 #include "base/macros.h" | |
13 #include "base/strings/string16.h" | |
14 #include "ui/base/glib/glib_integers.h" | |
15 #include "ui/base/glib/glib_signal.h" | |
16 #include "ui/base/ime/linux/linux_input_method_context.h" | |
17 #include "ui/gfx/geometry/rect.h" | |
18 | |
19 typedef union _GdkEvent GdkEvent; | |
20 typedef struct _GtkIMContext GtkIMContext; | |
21 | |
22 namespace libgtkui { | |
23 | |
24 // An implementation of LinuxInputMethodContext which is based on X11 event loop | |
25 // and uses GtkIMContext(gtk-immodule) as a bridge from/to underlying IMEs. | |
26 class X11InputMethodContextImplGtk2 : public ui::LinuxInputMethodContext { | |
27 public: | |
28 X11InputMethodContextImplGtk2(ui::LinuxInputMethodContextDelegate* delegate, | |
29 bool is_simple); | |
30 ~X11InputMethodContextImplGtk2() override; | |
31 | |
32 // Overriden from ui::LinuxInputMethodContext | |
33 bool DispatchKeyEvent(const ui::KeyEvent& key_event) override; | |
34 void SetCursorLocation(const gfx::Rect& rect) override; | |
35 void Reset() override; | |
36 void Focus() override; | |
37 void Blur() override; | |
38 | |
39 private: | |
40 // Resets the cache of X modifier keycodes. | |
41 // TODO(yukishiino): We should call this method whenever X keyboard mapping | |
42 // changes, for example when a user switched to another keyboard layout. | |
43 void ResetXModifierKeycodesCache(); | |
44 | |
45 // Constructs a GdkEventKey from a XKeyEvent and returns it. Otherwise, | |
46 // returns NULL. The returned GdkEvent must be freed by gdk_event_free. | |
47 GdkEvent* GdkEventFromNativeEvent(const base::NativeEvent& native_event); | |
48 | |
49 // Returns true if the hardware |keycode| is assigned to a modifier key. | |
50 bool IsKeycodeModifierKey(unsigned int keycode) const; | |
51 | |
52 // Returns true if one of |keycodes| is pressed. |keybits| is a bit vector | |
53 // returned by XQueryKeymap, and |num_keys| is the number of keys in | |
54 // |keybits|. | |
55 bool IsAnyOfKeycodesPressed(const std::vector<int>& keycodes, | |
56 const char* keybits, | |
57 int num_keys) const; | |
58 | |
59 // GtkIMContext event handlers. They are shared among |gtk_context_simple_| | |
60 // and |gtk_multicontext_|. | |
61 CHROMEG_CALLBACK_1(X11InputMethodContextImplGtk2, void, OnCommit, | |
62 GtkIMContext*, gchar*); | |
63 CHROMEG_CALLBACK_0(X11InputMethodContextImplGtk2, void, OnPreeditChanged, | |
64 GtkIMContext*); | |
65 CHROMEG_CALLBACK_0(X11InputMethodContextImplGtk2, void, OnPreeditEnd, | |
66 GtkIMContext*); | |
67 CHROMEG_CALLBACK_0(X11InputMethodContextImplGtk2, void, OnPreeditStart, | |
68 GtkIMContext*); | |
69 | |
70 // A set of callback functions. Must not be NULL. | |
71 ui::LinuxInputMethodContextDelegate* delegate_; | |
72 | |
73 // IME's input GTK context. | |
74 GtkIMContext* gtk_context_; | |
75 | |
76 gpointer gdk_last_set_client_window_; | |
77 | |
78 // Last known caret bounds relative to the screen coordinates. | |
79 gfx::Rect last_caret_bounds_; | |
80 | |
81 // A set of hardware keycodes of modifier keys. | |
82 base::hash_set<unsigned int> modifier_keycodes_; | |
83 | |
84 // A list of keycodes of each modifier key. | |
85 std::vector<int> meta_keycodes_; | |
86 std::vector<int> super_keycodes_; | |
87 std::vector<int> hyper_keycodes_; | |
88 | |
89 DISALLOW_COPY_AND_ASSIGN(X11InputMethodContextImplGtk2); | |
90 }; | |
91 | |
92 } // namespace libgtkui | |
93 | |
94 #endif // CHROME_BROWSER_UI_LIBGTKUI_X11_INPUT_METHOD_CONTEXT_IMPL_GTK2_H_ | |
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