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1 // Copyright (c) 2011 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 UI_VIEWS_IME_INPUT_METHOD_GTK_H_ | |
6 #define UI_VIEWS_IME_INPUT_METHOD_GTK_H_ | |
7 #pragma once | |
8 | |
9 #include <gtk/gtk.h> | |
10 | |
11 #include "base/basictypes.h" | |
12 #include "base/compiler_specific.h" | |
13 #include "ui/base/gtk/gtk_signal.h" | |
14 #include "ui/base/ime/composition_text.h" | |
15 #include "ui/base/ime/text_input_client.h" | |
16 #include "ui/views/ime/input_method_base.h" | |
17 #include "ui/views/view.h" | |
18 | |
19 namespace views { | |
20 | |
21 // An InputMethod implementation based on GtkIMContext. Most code are copied | |
22 // from chrome/browser/renderer_host/gtk_im_context_wrapper.* | |
23 // It's intended for testing purpose. | |
24 class InputMethodGtk : public InputMethodBase { | |
25 public: | |
26 explicit InputMethodGtk(internal::InputMethodDelegate* delegate); | |
27 virtual ~InputMethodGtk(); | |
28 | |
29 // Overridden from InputMethod: | |
30 virtual void Init(Widget* widget) OVERRIDE; | |
31 virtual void OnFocus() OVERRIDE; | |
32 virtual void OnBlur() OVERRIDE; | |
33 virtual void DispatchKeyEvent(const KeyEvent& key) OVERRIDE; | |
34 virtual void OnTextInputTypeChanged(View* view) OVERRIDE; | |
35 virtual void OnCaretBoundsChanged(View* view) OVERRIDE; | |
36 virtual void CancelComposition(View* view) OVERRIDE; | |
37 virtual std::string GetInputLocale() OVERRIDE; | |
38 virtual base::i18n::TextDirection GetInputTextDirection() OVERRIDE; | |
39 virtual bool IsActive() OVERRIDE; | |
40 | |
41 private: | |
42 // Overridden from InputMethodBase: | |
43 virtual void OnWillChangeFocus(View* focused_before, View* focused) OVERRIDE; | |
44 virtual void OnDidChangeFocus(View* focused_before, View* focused) OVERRIDE; | |
45 | |
46 // Asks the client to confirm current composition text. | |
47 void ConfirmCompositionText(); | |
48 | |
49 // Resets |context_| and |context_simple_|. | |
50 void ResetContext(); | |
51 | |
52 // Checks the availability of focused text input client and update focus state | |
53 // of |context_| and |context_simple_| accordingly. | |
54 void UpdateContextFocusState(); | |
55 | |
56 // Processes a key event that was already filtered by the input method. | |
57 // A VKEY_PROCESSKEY may be dispatched to the focused View. | |
58 void ProcessFilteredKeyPressEvent(const KeyEvent& key); | |
59 | |
60 // Processes a key event that was not filtered by the input method. | |
61 void ProcessUnfilteredKeyPressEvent(const KeyEvent& key); | |
62 | |
63 // Sends input method result caused by the given key event to the focused text | |
64 // input client. | |
65 void ProcessInputMethodResult(const KeyEvent& key, bool filtered); | |
66 | |
67 // Checks if the pending input method result needs inserting into the focused | |
68 // text input client as a single character. | |
69 bool NeedInsertChar() const; | |
70 | |
71 // Checks if there is pending input method result. | |
72 bool HasInputMethodResult() const; | |
73 | |
74 // Fabricates a key event with VKEY_PROCESSKEY key code and dispatches it to | |
75 // the focused View. | |
76 void SendFakeProcessKeyEvent(bool pressed) const; | |
77 | |
78 // Synthesize a GdkEventKey based on given key event. The returned GdkEventKey | |
79 // must be freed with gdk_event_free(). | |
80 GdkEvent* SynthesizeGdkEventKey(const KeyEvent& key) const; | |
81 | |
82 // Event handlers: | |
83 CHROMEG_CALLBACK_1(InputMethodGtk, void, OnCommit, GtkIMContext*, gchar*); | |
84 CHROMEG_CALLBACK_0(InputMethodGtk, void, OnPreeditStart, GtkIMContext*); | |
85 CHROMEG_CALLBACK_0(InputMethodGtk, void, OnPreeditChanged, GtkIMContext*); | |
86 CHROMEG_CALLBACK_0(InputMethodGtk, void, OnPreeditEnd, GtkIMContext*); | |
87 | |
88 CHROMEGTK_CALLBACK_0(InputMethodGtk, void, OnWidgetRealize); | |
89 CHROMEGTK_CALLBACK_0(InputMethodGtk, void, OnWidgetUnrealize); | |
90 | |
91 GtkIMContext* context_; | |
92 GtkIMContext* context_simple_; | |
93 | |
94 ui::CompositionText composition_; | |
95 | |
96 string16 result_text_; | |
97 | |
98 // Signal ids for corresponding gtk signals. | |
99 gulong widget_realize_id_; | |
100 gulong widget_unrealize_id_; | |
101 | |
102 // Indicates if |context_| and |context_simple_| are focused or not. | |
103 bool context_focused_; | |
104 | |
105 // Indicates if we are handling a key event. | |
106 bool handling_key_event_; | |
107 | |
108 // Indicates if there is an ongoing composition text. | |
109 bool composing_text_; | |
110 | |
111 // Indicates if the composition text is changed or deleted. | |
112 bool composition_changed_; | |
113 | |
114 // If it's true then all input method result received before the next key | |
115 // event will be discarded. | |
116 bool suppress_next_result_; | |
117 | |
118 DISALLOW_COPY_AND_ASSIGN(InputMethodGtk); | |
119 }; | |
120 | |
121 } // namespace views | |
122 | |
123 #endif // UI_VIEWS_IME_INPUT_METHOD_GTK_H_ | |
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