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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 WIN8_METRO_DRIVER_IME_TEXT_STORE_DELEGATE_H_ | |
| 6 #define WIN8_METRO_DRIVER_IME_TEXT_STORE_DELEGATE_H_ | |
| 7 | |
| 8 #include <vector> | |
| 9 | |
| 10 #include <windows.h> | |
| 11 #include <stdint.h> | |
| 12 | |
| 13 #include "base/strings/string16.h" | |
| 14 | |
| 15 namespace metro_viewer { | |
| 16 struct UnderlineInfo; | |
| 17 } | |
| 18 | |
| 19 namespace metro_driver { | |
| 20 | |
| 21 // A delegate which works together with virtual text stores. | |
| 22 // Objects that implement this delegate will receive notifications from a | |
| 23 // virtual text store whenever an IME updates the composition or commits text. | |
| 24 // Objects that implement this delegate are also responsible for calculating | |
| 25 // the character position of composition and caret position upon request. | |
| 26 class TextStoreDelegate { | |
| 27 public: | |
| 28 virtual ~TextStoreDelegate() {} | |
| 29 | |
| 30 // Called when on-going composition is updated. An empty |text| represents | |
| 31 // that the composition is canceled. | |
| 32 virtual void OnCompositionChanged( | |
| 33 const base::string16& text, | |
| 34 int32_t selection_start, | |
| 35 int32_t selection_end, | |
| 36 const std::vector<metro_viewer::UnderlineInfo>& underlines) = 0; | |
| 37 | |
| 38 // Called when |text| is committed. | |
| 39 virtual void OnTextCommitted(const base::string16& text) = 0; | |
| 40 | |
| 41 // Called when an IME requests the caret position. Objects that implement | |
| 42 // this method must return the caret position in screen coordinates. | |
| 43 virtual RECT GetCaretBounds() = 0; | |
| 44 | |
| 45 // Called when an IME requests the bounding box of an character whose | |
| 46 // index is |index| in the on-going composition. position. Objects that | |
| 47 // implement this method must return true and fill the character bounds into | |
| 48 // |rect| in screen coordinates. | |
| 49 // Should return false if |index| is invalid. | |
| 50 virtual bool GetCompositionCharacterBounds(uint32_t index, RECT* rect) = 0; | |
| 51 }; | |
| 52 | |
| 53 } // namespace metro_driver | |
| 54 | |
| 55 #endif // WIN8_METRO_DRIVER_IME_TEXT_STORE_DELEGATE_H_ | |
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