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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_INSTANT_INSTANT_MODEL_H_
#define CHROME_BROWSER_INSTANT_INSTANT_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 InstantModelObserver;
namespace content {
class WebContents;
}
// Holds state that is important to any views concerned with visibility and
// layout of the Instant preview.
class InstantModel {
public:
explicit InstantModel(InstantController* controller);
~InstantModel();
// InstantModel only uses Mode::mode internally. Other parts of Mode, such as
// Mode::origin, may have arbitrary values, and should be ignored.
const chrome::search::Mode& mode() const { return mode_; }
int height() const { return height_; }
InstantSizeUnits height_units() const { return height_units_; }
void SetPreviewState(const chrome::search::Mode& mode,
int height,
InstantSizeUnits height_units);
void SetPreviewContents(content::WebContents* preview_contents);
content::WebContents* GetPreviewContents() const;
// Add and remove observers.
void AddObserver(InstantModelObserver* observer);
void RemoveObserver(InstantModelObserver* observer);
private:
chrome::search::Mode mode_;
int height_;
InstantSizeUnits height_units_;
// Weak. Remembers the last set preview contents to detect changes. Actual
// preview contents is fetched from the |controller_| as this may not always
// reflect the actual preview in effect.
content::WebContents* preview_contents_;
// Weak. The controller currently holds some model state.
// TODO(dhollowa): Remove this, transfer all model state to InstantModel.
InstantController* const controller_;
// Observers.
ObserverList<InstantModelObserver> observers_;
DISALLOW_COPY_AND_ASSIGN(InstantModel);
};
#endif // CHROME_BROWSER_INSTANT_INSTANT_MODEL_H_
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