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// Copyright 2014 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.
#include "ash/ash_export.h"
#include "ui/base/ime/candidate_window.h"
#include "ui/views/bubble/bubble_delegate.h"
#include "ui/views/controls/button/button.h"
namespace ash {
namespace ime {
class CandidateView;
class InformationTextArea;
// CandidateWindowView is the main container of the candidate window UI.
class ASH_EXPORT CandidateWindowView : public views::BubbleDelegateView,
public views::ButtonListener {
// The object can be monitored by the observer.
class Observer {
virtual ~Observer() {}
// The function is called when a candidate is committed.
virtual void OnCandidateCommitted(int index) = 0;
explicit CandidateWindowView(gfx::NativeView parent);
virtual ~CandidateWindowView();
views::Widget* InitWidget();
// Adds the given observer. The ownership is not transferred.
void AddObserver(Observer* observer) {
// Removes the given observer.
void RemoveObserver(Observer* observer) {
// Hides the lookup table.
void HideLookupTable();
// Hides the auxiliary text.
void HideAuxiliaryText();
// Hides the preedit text.
void HidePreeditText();
// Shows the lookup table.
void ShowLookupTable();
// Shows the auxiliary text.
void ShowAuxiliaryText();
// Shows the preedit text.
void ShowPreeditText();
// Updates the preedit text.
void UpdatePreeditText(const base::string16& text);
// Updates candidates of the candidate window from |candidate_window|.
// Candidates are arranged per |orientation|.
void UpdateCandidates(const ui::CandidateWindow& candidate_window);
void SetCursorBounds(const gfx::Rect& cursor_bounds,
const gfx::Rect& composition_head);
friend class CandidateWindowViewTest;
// Overridden from views::ButtonListener:
virtual void ButtonPressed(views::Button* sender,
const ui::Event& event) OVERRIDE;
void SelectCandidateAt(int index_in_page);
void UpdateVisibility();
// Initializes the candidate views if needed.
void MaybeInitializeCandidateViews(
const ui::CandidateWindow& candidate_window);
// The candidate window data model.
ui::CandidateWindow candidate_window_;
// The index in the current page of the candidate currently being selected.
int selected_candidate_index_in_page_;
// The observers of the object.
ObserverList<Observer> observers_;
// Views created in the class will be part of tree of |this|, so these
// child views will be deleted when |this| is deleted.
InformationTextArea* auxiliary_text_;
InformationTextArea* preedit_;
views::View* candidate_area_;
// The candidate views are used for rendering candidates.
std::vector<CandidateView*> candidate_views_;
// Current columns size in |candidate_area_|.
gfx::Size previous_shortcut_column_size_;
gfx::Size previous_candidate_column_size_;
gfx::Size previous_annotation_column_size_;
// The last cursor bounds.
gfx::Rect cursor_bounds_;
// The last compostion head bounds.
gfx::Rect composition_head_bounds_;
// True if the candidate window should be shown with aligning with composition
// text as opposed to the cursor.
bool should_show_at_composition_head_;
// True if the candidate window should be shonw on the upper side of
// composition text.
bool should_show_upper_side_;
// True if the candidate window was open. This is used to determine when to
// send OnCandidateWindowOpened and OnCandidateWindowClosed events.
bool was_candidate_window_open_;
} // namespace ime
} // namespace ash