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// Copyright 2012 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 CHROME_BROWSER_UI_SEARCH_INSTANT_OVERLAY_MODEL_H_
#define CHROME_BROWSER_UI_SEARCH_INSTANT_OVERLAY_MODEL_H_
#include "base/basictypes.h"
#include "base/observer_list.h"
#include "chrome/common/instant_types.h"
#include "chrome/common/search_types.h"
class InstantController;
class InstantOverlayModelObserver;
namespace content {
class WebContents;
}
// Holds state that is important to any views concerned with visibility and
// layout of the Instant overlay.
class InstantOverlayModel {
public:
explicit InstantOverlayModel(InstantController* controller);
~InstantOverlayModel();
// InstantOverlayModel only uses Mode::mode internally. Other parts of Mode,
// such as Mode::origin, may have arbitrary values, and should be ignored.
const SearchMode& mode() const { return mode_; }
int height() const { return height_; }
InstantSizeUnits height_units() const { return height_units_; }
void SetOverlayState(const SearchMode& mode,
int height,
InstantSizeUnits height_units);
void SetOverlayContents(content::WebContents* overlay_contents);
content::WebContents* GetOverlayContents() const;
// Add and remove observers.
void AddObserver(InstantOverlayModelObserver* observer);
void RemoveObserver(InstantOverlayModelObserver* observer);
private:
SearchMode mode_;
int height_;
InstantSizeUnits height_units_;
// Weak. Remembers the last set overlay contents to detect changes. Actual
// overlay contents is fetched from the |controller_| as this may not always
// reflect the actual overlay in effect.
content::WebContents* overlay_contents_;
// Weak. The controller currently holds some model state.
// TODO(dhollowa): Remove this, transfer all state to InstantOverlayModel.
InstantController* const controller_;
// Observers.
ObserverList<InstantOverlayModelObserver> observers_;
DISALLOW_COPY_AND_ASSIGN(InstantOverlayModel);
};
#endif // CHROME_BROWSER_UI_SEARCH_INSTANT_OVERLAY_MODEL_H_
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