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 string16& text) OVERRIDE; 33 virtual void InsertChar(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() OVERRIDE; 39 virtual bool GetCompositionCharacterBounds(uint32 index, 40 gfx::Rect* rect) OVERRIDE; 41 virtual bool HasCompositionText() OVERRIDE; 42 virtual bool GetTextRange(ui::Range* range) OVERRIDE; 43 virtual bool GetCompositionTextRange(ui::Range* range) OVERRIDE; 44 virtual bool GetSelectionRange(ui::Range* range) OVERRIDE; 45 virtual bool SetSelectionRange(const ui::Range& range) OVERRIDE; 46 virtual bool DeleteRange(const ui::Range& range) OVERRIDE; 47 virtual bool GetTextFromRange(const ui::Range& range, 48 string16* text) 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 55 private: 56 // Invoked when text is typed. Tries to change the selection appropriately. 57 void OnTextInput(const string16& text); 58 59 // Returns true if the text of the node at |row| starts with |lower_text|. 60 bool TextAtRowMatchesText(int row, const string16& lower_text); 61 62 // Clears |current_text_| and resets |time_of_last_key_|. 63 void ClearText(); 64 65 PrefixDelegate* prefix_delegate_; 66 67 // Time OnTextInput() was last invoked. 68 base::TimeTicks time_of_last_key_; 69 70 string16 current_text_; 71 72 DISALLOW_COPY_AND_ASSIGN(PrefixSelector); 73 }; 74 75 } // namespace views 76 77 #endif // UI_VIEWS_CONTROLS_PREFIX_SELECTOR_H_ 78
