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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_VIEWS_CONTROLS_PREFIX_SELECTOR_H_ | |
| 6 #define UI_VIEWS_CONTROLS_PREFIX_SELECTOR_H_ | |
| 7 | |
| 8 #include "base/strings/string16.h" | |
| 9 #include "base/time/time.h" | |
| 10 #include "ui/base/ime/text_input_client.h" | |
| 11 #include "ui/views/views_export.h" | |
| 12 | |
| 13 namespace views { | |
| 14 | |
| 15 class PrefixDelegate; | |
| 16 | |
| 17 // PrefixSelector is used to change the selection in a view as the user | |
| 18 // types characters. | |
| 19 class VIEWS_EXPORT PrefixSelector : public ui::TextInputClient { | |
| 20 public: | |
| 21 explicit PrefixSelector(PrefixDelegate* delegate); | |
| 22 virtual ~PrefixSelector(); | |
| 23 | |
| 24 // Invoked from the view when it loses focus. | |
| 25 void OnViewBlur(); | |
| 26 | |
| 27 // ui::TextInputClient: | |
| 28 virtual void SetCompositionText( | |
| 29 const ui::CompositionText& composition) override; | |
| 30 virtual void ConfirmCompositionText() override; | |
| 31 virtual void ClearCompositionText() override; | |
| 32 virtual void InsertText(const base::string16& text) override; | |
| 33 virtual void InsertChar(base::char16 ch, int flags) override; | |
| 34 virtual gfx::NativeWindow GetAttachedWindow() const override; | |
| 35 virtual ui::TextInputType GetTextInputType() const override; | |
| 36 virtual ui::TextInputMode GetTextInputMode() const override; | |
| 37 virtual bool CanComposeInline() const override; | |
| 38 virtual gfx::Rect GetCaretBounds() const override; | |
| 39 virtual bool GetCompositionCharacterBounds(uint32 index, | |
| 40 gfx::Rect* rect) const override; | |
| 41 virtual bool HasCompositionText() const override; | |
| 42 virtual bool GetTextRange(gfx::Range* range) const override; | |
| 43 virtual bool GetCompositionTextRange(gfx::Range* range) const override; | |
| 44 virtual bool GetSelectionRange(gfx::Range* range) const override; | |
| 45 virtual bool SetSelectionRange(const gfx::Range& range) override; | |
| 46 virtual bool DeleteRange(const gfx::Range& range) override; | |
| 47 virtual bool GetTextFromRange(const gfx::Range& range, | |
| 48 base::string16* text) const override; | |
| 49 virtual void OnInputMethodChanged() override; | |
| 50 virtual bool ChangeTextDirectionAndLayoutAlignment( | |
| 51 base::i18n::TextDirection direction) override; | |
| 52 virtual void ExtendSelectionAndDelete(size_t before, size_t after) override; | |
| 53 virtual void EnsureCaretInRect(const gfx::Rect& rect) override; | |
| 54 virtual void OnCandidateWindowShown() override; | |
| 55 virtual void OnCandidateWindowUpdated() override; | |
| 56 virtual void OnCandidateWindowHidden() override; | |
| 57 | |
| 58 virtual bool IsEditingCommandEnabled(int command_id) override; | |
| 59 virtual void ExecuteEditingCommand(int command_id) override; | |
| 60 | |
| 61 private: | |
| 62 // Invoked when text is typed. Tries to change the selection appropriately. | |
| 63 void OnTextInput(const base::string16& text); | |
| 64 | |
| 65 // Returns true if the text of the node at |row| starts with |lower_text|. | |
| 66 bool TextAtRowMatchesText(int row, const base::string16& lower_text); | |
| 67 | |
| 68 // Clears |current_text_| and resets |time_of_last_key_|. | |
| 69 void ClearText(); | |
| 70 | |
| 71 PrefixDelegate* prefix_delegate_; | |
| 72 | |
| 73 // Time OnTextInput() was last invoked. | |
| 74 base::TimeTicks time_of_last_key_; | |
| 75 | |
| 76 base::string16 current_text_; | |
| 77 | |
| 78 DISALLOW_COPY_AND_ASSIGN(PrefixSelector); | |
| 79 }; | |
| 80 | |
| 81 } // namespace views | |
| 82 | |
| 83 #endif // UI_VIEWS_CONTROLS_PREFIX_SELECTOR_H_ | |
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