| // Copyright 2013 The Chromium Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #ifndef UI_VIEWS_CONTROLS_PREFIX_SELECTOR_H_ |
| #define UI_VIEWS_CONTROLS_PREFIX_SELECTOR_H_ |
| |
| #include <stddef.h> |
| #include <stdint.h> |
| |
| #include "base/macros.h" |
| #include "base/strings/string16.h" |
| #include "base/time/time.h" |
| #include "ui/base/ime/text_input_client.h" |
| #include "ui/views/views_export.h" |
| |
| namespace base { |
| class TickClock; |
| } |
| |
| namespace views { |
| |
| class PrefixDelegate; |
| class View; |
| |
| // PrefixSelector is used to change the selection in a view as the user |
| // types characters. |
| class VIEWS_EXPORT PrefixSelector : public ui::TextInputClient { |
| public: |
| PrefixSelector(PrefixDelegate* delegate, View* host_view); |
| ~PrefixSelector() override; |
| |
| // Invoked from the view when it loses focus. |
| void OnViewBlur(); |
| |
| // Returns whether a key typed now would continue the existing search or start |
| // a new search. |
| bool ShouldContinueSelection() const; |
| |
| // ui::TextInputClient: |
| void SetCompositionText(const ui::CompositionText& composition) override; |
| void ConfirmCompositionText() override; |
| void ClearCompositionText() override; |
| void InsertText(const base::string16& text) override; |
| void InsertChar(const ui::KeyEvent& event) override; |
| ui::TextInputType GetTextInputType() const override; |
| ui::TextInputMode GetTextInputMode() const override; |
| base::i18n::TextDirection GetTextDirection() const override; |
| int GetTextInputFlags() const override; |
| bool CanComposeInline() const override; |
| gfx::Rect GetCaretBounds() const override; |
| bool GetCompositionCharacterBounds(uint32_t index, |
| gfx::Rect* rect) const override; |
| bool HasCompositionText() const override; |
| FocusReason GetFocusReason() const override; |
| bool GetTextRange(gfx::Range* range) const override; |
| bool GetCompositionTextRange(gfx::Range* range) const override; |
| bool GetSelectionRange(gfx::Range* range) const override; |
| bool SetSelectionRange(const gfx::Range& range) override; |
| bool DeleteRange(const gfx::Range& range) override; |
| bool GetTextFromRange(const gfx::Range& range, |
| base::string16* text) const override; |
| void OnInputMethodChanged() override; |
| bool ChangeTextDirectionAndLayoutAlignment( |
| base::i18n::TextDirection direction) override; |
| void ExtendSelectionAndDelete(size_t before, size_t after) override; |
| void EnsureCaretNotInRect(const gfx::Rect& rect) override; |
| |
| bool IsTextEditCommandEnabled(ui::TextEditCommand command) const override; |
| void SetTextEditCommandForNextKeyEvent(ui::TextEditCommand command) override; |
| ukm::SourceId GetClientSourceForMetrics() const override; |
| bool ShouldDoLearning() override; |
| |
| void set_tick_clock_for_testing(const base::TickClock* clock) { |
| tick_clock_ = clock; |
| } |
| |
| private: |
| // Invoked when text is typed. Tries to change the selection appropriately. |
| void OnTextInput(const base::string16& text); |
| |
| // Returns true if the text of the node at |row| starts with |lower_text|. |
| bool TextAtRowMatchesText(int row, const base::string16& lower_text); |
| |
| // Clears |current_text_| and resets |time_of_last_key_|. |
| void ClearText(); |
| |
| PrefixDelegate* prefix_delegate_; |
| |
| View* host_view_; |
| |
| // Time OnTextInput() was last invoked. |
| base::TimeTicks time_of_last_key_; |
| |
| base::string16 current_text_; |
| |
| // TickClock used for getting the time of the current keystroke, used for |
| // continuing or restarting selections. |
| const base::TickClock* tick_clock_; |
| |
| DISALLOW_COPY_AND_ASSIGN(PrefixSelector); |
| }; |
| |
| } // namespace views |
| |
| #endif // UI_VIEWS_CONTROLS_PREFIX_SELECTOR_H_ |