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// 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 "base/strings/string16.h"
#include "base/time/time.h"
#include "ui/base/ime/text_input_client.h"
#include "ui/views/views_export.h"
namespace views {
class PrefixDelegate;
// PrefixSelector is used to change the selection in a view as the user
// types characters.
class VIEWS_EXPORT PrefixSelector : public ui::TextInputClient {
public:
explicit PrefixSelector(PrefixDelegate* delegate);
virtual ~PrefixSelector();
// Invoked from the view when it loses focus.
void OnViewBlur();
// ui::TextInputClient:
virtual void SetCompositionText(
const ui::CompositionText& composition) OVERRIDE;
virtual void ConfirmCompositionText() OVERRIDE;
virtual void ClearCompositionText() OVERRIDE;
virtual void InsertText(const base::string16& text) OVERRIDE;
virtual void InsertChar(base::char16 ch, int flags) OVERRIDE;
virtual gfx::NativeWindow GetAttachedWindow() const OVERRIDE;
virtual ui::TextInputType GetTextInputType() const OVERRIDE;
virtual ui::TextInputMode GetTextInputMode() const OVERRIDE;
virtual bool CanComposeInline() const OVERRIDE;
virtual gfx::Rect GetCaretBounds() const OVERRIDE;
virtual bool GetCompositionCharacterBounds(uint32 index,
gfx::Rect* rect) const OVERRIDE;
virtual bool HasCompositionText() const OVERRIDE;
virtual bool GetTextRange(gfx::Range* range) const OVERRIDE;
virtual bool GetCompositionTextRange(gfx::Range* range) const OVERRIDE;
virtual bool GetSelectionRange(gfx::Range* range) const OVERRIDE;
virtual bool SetSelectionRange(const gfx::Range& range) OVERRIDE;
virtual bool DeleteRange(const gfx::Range& range) OVERRIDE;
virtual bool GetTextFromRange(const gfx::Range& range,
base::string16* text) const OVERRIDE;
virtual void OnInputMethodChanged() OVERRIDE;
virtual bool ChangeTextDirectionAndLayoutAlignment(
base::i18n::TextDirection direction) OVERRIDE;
virtual void ExtendSelectionAndDelete(size_t before, size_t after) OVERRIDE;
virtual void EnsureCaretInRect(const gfx::Rect& rect) OVERRIDE;
virtual void OnCandidateWindowShown() OVERRIDE;
virtual void OnCandidateWindowUpdated() OVERRIDE;
virtual void OnCandidateWindowHidden() OVERRIDE;
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_;
// Time OnTextInput() was last invoked.
base::TimeTicks time_of_last_key_;
base::string16 current_text_;
DISALLOW_COPY_AND_ASSIGN(PrefixSelector);
};
} // namespace views
#endif // UI_VIEWS_CONTROLS_PREFIX_SELECTOR_H_
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