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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 EXTENSIONS_BROWSER_API_SYSTEM_DISPLAY_DISPLAY_INFO_PROVIDER_H_
#define EXTENSIONS_BROWSER_API_SYSTEM_DISPLAY_DISPLAY_INFO_PROVIDER_H_
#include <string>
#include <vector>
#include "base/macros.h"
#include "base/memory/linked_ptr.h"
namespace gfx {
class Display;
class Screen;
}
namespace extensions {
namespace core_api {
namespace system_display {
struct DisplayProperties;
struct DisplayUnitInfo;
}
}
typedef std::vector<linked_ptr<core_api::system_display::DisplayUnitInfo> >
DisplayInfo;
class DisplayInfoProvider {
public:
virtual ~DisplayInfoProvider();
// Returns a pointer to DisplayInfoProvider or NULL if Create()
// or InitializeForTesting() or not called yet.
static DisplayInfoProvider* Get();
// This is for tests that run in its own process (e.g. browser_tests).
// Using this in other tests (e.g. unit_tests) will result in DCHECK failure.
static void InitializeForTesting(DisplayInfoProvider* display_info_provider);
// Updates the display with |display_id| according to |info|. Returns whether
// the display was successfully updated. On failure, no display parameters
// should be changed, and |error| should be set to the error string.
virtual bool SetInfo(const std::string& display_id,
const core_api::system_display::DisplayProperties& info,
std::string* error) = 0;
// Get the screen that is always active, which will be used for monitoring
// display changes events.
virtual gfx::Screen* GetActiveScreen() = 0;
DisplayInfo GetAllDisplaysInfo();
protected:
DisplayInfoProvider();
private:
static DisplayInfoProvider* Create();
// Update the content of the |unit| obtained for |display| using
// platform specific method.
virtual void UpdateDisplayUnitInfoForPlatform(
const gfx::Display& display,
core_api::system_display::DisplayUnitInfo* unit) = 0;
DISALLOW_COPY_AND_ASSIGN(DisplayInfoProvider);
};
} // namespace extensions
#endif // EXTENSIONS_BROWSER_API_SYSTEM_DISPLAY_DISPLAY_INFO_PROVIDER_H_
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