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_ 84