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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 VIEWS_IME_TEXT_INPUT_CLIENT_H_ | |
6 #define VIEWS_IME_TEXT_INPUT_CLIENT_H_ | |
7 #pragma once | |
8 | |
9 #include <vector> | |
10 | |
11 #include "base/basictypes.h" | |
12 #include "base/string16.h" | |
13 #include "ui/base/ime/composition_text.h" | |
14 #include "ui/base/ime/text_input_type.h" | |
15 #include "ui/base/range/range.h" | |
16 #include "views/views_export.h" | |
17 | |
18 namespace gfx { | |
19 class Rect; | |
20 } | |
21 | |
22 namespace views { | |
23 | |
24 class View; | |
25 | |
26 // An interface implemented by a View that needs text input support. | |
27 class VIEWS_EXPORT TextInputClient { | |
28 public: | |
29 virtual ~TextInputClient() {} | |
30 | |
31 // Input method result ------------------------------------------------------- | |
32 | |
33 // Sets composition text and attributes. If there is composition text already, | |
34 // it’ll be replaced by the new one. Otherwise, current selection will be | |
35 // replaced. If there is no selection, the composition text will be inserted | |
36 // at the insertion point. | |
37 virtual void SetCompositionText(const ui::CompositionText& composition) = 0; | |
38 | |
39 // Converts current composition text into final content. | |
40 virtual void ConfirmCompositionText() = 0; | |
41 | |
42 // Removes current composition text. | |
43 virtual void ClearCompositionText() = 0; | |
44 | |
45 // Inserts a given text at the insertion point. Current composition text or | |
46 // selection will be removed. This method should never be called when the | |
47 // current text input type is TEXT_INPUT_TYPE_NONE. | |
48 virtual void InsertText(const string16& text) = 0; | |
49 | |
50 // Inserts a single char at the insertion point. Unlike above InsertText() | |
51 // method, this method has an extra |flags| parameter indicating the modifier | |
52 // key states when the character is generated. This method should only be | |
53 // called when a key press is not handled by the input method but still | |
54 // generates a character (eg. by the keyboard driver). In another word, the | |
55 // preceding key press event should not be a VKEY_PROCESSKEY. | |
56 // This method will be called whenever a char is generated by the keyboard, | |
57 // even if the current text input type is TEXT_INPUT_TYPE_NONE. | |
58 virtual void InsertChar(char16 ch, int flags) = 0; | |
59 | |
60 // Input context information ------------------------------------------------- | |
61 | |
62 // Returns current text input type. It could be changed and even becomes | |
63 // TEXT_INPUT_TYPE_NONE at runtime. | |
64 virtual ui::TextInputType GetTextInputType() const = 0; | |
65 | |
66 // Returns current caret (insertion point) bounds relative to the View’s | |
67 // coordinates. If there is selection, then the selection bounds will be | |
68 // returned. | |
69 virtual gfx::Rect GetCaretBounds() = 0; | |
70 | |
71 // Returns true if there is composition text. | |
72 virtual bool HasCompositionText() = 0; | |
73 | |
74 // Document content operations ---------------------------------------------- | |
75 | |
76 // Retrieves the UTF-16 based character range containing accessibled text in | |
77 // the View. It must cover the composition and selection range. | |
78 // Returns false if the information cannot be retrieved right now. | |
79 virtual bool GetTextRange(ui::Range* range) = 0; | |
80 | |
81 // Retrieves the UTF-16 based character range of current composition text. | |
82 // Returns false if the information cannot be retrieved right now. | |
83 virtual bool GetCompositionTextRange(ui::Range* range) = 0; | |
84 | |
85 // Retrieves the UTF-16 based character range of current selection. | |
86 // Returns false if the information cannot be retrieved right now. | |
87 virtual bool GetSelectionRange(ui::Range* range) = 0; | |
88 | |
89 // Selects the given UTF-16 based character range. Current composition text | |
90 // will be confirmed before selecting the range. | |
91 // Returns false if the operation is not supported. | |
92 virtual bool SetSelectionRange(const ui::Range& range) = 0; | |
93 | |
94 // Deletes contents in the given UTF-16 based character range. Current | |
95 // composition text will be confirmed before deleting the range. | |
96 // The input caret will be moved to the place where the range gets deleted. | |
97 // Returns false if the oepration is not supported. | |
98 virtual bool DeleteRange(const ui::Range& range) = 0; | |
99 | |
100 // Retrieves the text content in a given UTF-16 based character range. | |
101 // The result will be stored into |*text|. | |
102 // Returns false if the operation is not supported or the specified range | |
103 // is out of the text range returned by GetTextRange(). | |
104 virtual bool GetTextFromRange(const ui::Range& range, string16* text) = 0; | |
105 | |
106 // Miscellaneous ------------------------------------------------------------ | |
107 | |
108 // Called whenever current keyboard layout or input method is changed, | |
109 // especially the change of input locale and text direction. | |
110 virtual void OnInputMethodChanged() = 0; | |
111 | |
112 // Called whenever the user requests to change the text direction and layout | |
113 // alignment of the current text box. It’s for supporting ctrl-shift on | |
114 // Windows. | |
115 // Returns false if the operation is not supported. | |
116 virtual bool ChangeTextDirectionAndLayoutAlignment( | |
117 base::i18n::TextDirection direction) = 0; | |
118 | |
119 // Gets the View object who owns this TextInputClient instance. | |
120 virtual View* GetOwnerViewOfTextInputClient() = 0; | |
121 }; | |
122 | |
123 } // namespace views | |
124 | |
125 #endif // VIEWS_IME_TEXT_INPUT_CLIENT_H_ | |
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