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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 UI_BASE_IME_LINUX_LINUX_INPUT_METHOD_CONTEXT_H_ | |
| 6 #define UI_BASE_IME_LINUX_LINUX_INPUT_METHOD_CONTEXT_H_ | |
| 7 | |
| 8 #include "base/strings/string16.h" | |
| 9 #include "ui/base/ime/text_input_type.h" | |
| 10 #include "ui/base/ui_base_export.h" | |
| 11 | |
| 12 namespace gfx { | |
| 13 class Rect; | |
| 14 } | |
| 15 | |
| 16 namespace ui { | |
| 17 | |
| 18 struct CompositionText; | |
| 19 class KeyEvent; | |
| 20 | |
| 21 // An interface of input method context for input method frameworks on | |
| 22 // GNU/Linux and likes. | |
| 23 class UI_BASE_EXPORT LinuxInputMethodContext { | |
| 24 public: | |
| 25 virtual ~LinuxInputMethodContext() {} | |
| 26 | |
| 27 // Dispatches the key event to an underlying IME. Returns true if the key | |
| 28 // event is handled, otherwise false. A client must set the text input type | |
| 29 // before dispatching a key event. | |
| 30 virtual bool DispatchKeyEvent(const ui::KeyEvent& key_event) = 0; | |
| 31 | |
| 32 // Resets the context. A client needs to call OnTextInputTypeChanged() again | |
| 33 // before calling DispatchKeyEvent(). | |
| 34 virtual void Reset() = 0; | |
| 35 | |
| 36 // Notifies the context that the text input type has changed. | |
| 37 virtual void OnTextInputTypeChanged(TextInputType text_input_type) = 0; | |
| 38 | |
| 39 // Notifies the context that the caret bounds have changed. |caret_bounds| is | |
| 40 // relative to screen coordinates. | |
| 41 virtual void OnCaretBoundsChanged(const gfx::Rect& caret_bounds) = 0; | |
| 42 }; | |
| 43 | |
| 44 // An interface of callback functions called from LinuxInputMethodContext. | |
| 45 class UI_BASE_EXPORT LinuxInputMethodContextDelegate { | |
| 46 public: | |
| 47 virtual ~LinuxInputMethodContextDelegate() {} | |
| 48 | |
| 49 // Commits the |text| to the text input client. | |
| 50 virtual void OnCommit(const base::string16& text) = 0; | |
| 51 | |
| 52 // Sets the composition text to the text input client. | |
| 53 virtual void OnPreeditChanged(const CompositionText& composition_text) = 0; | |
| 54 | |
| 55 // Cleans up a composition session and makes sure that the composition text is | |
| 56 // cleared. | |
| 57 virtual void OnPreeditEnd() = 0; | |
| 58 | |
| 59 // Prepares things for a new composition session. | |
| 60 virtual void OnPreeditStart() = 0; | |
| 61 }; | |
| 62 | |
| 63 } // namespace ui | |
| 64 | |
| 65 #endif // UI_BASE_IME_LINUX_LINUX_INPUT_METHOD_CONTEXT_H_ | |
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