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// Copyright 2015 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 COMPONENTS_EXO_SUB_SURFACE_H_
#define COMPONENTS_EXO_SUB_SURFACE_H_
#include "base/macros.h"
#include "base/memory/ref_counted.h"
#include "components/exo/surface_delegate.h"
#include "components/exo/surface_observer.h"
#include "ui/gfx/geometry/point.h"
namespace base {
namespace trace_event {
class TracedValue;
}
}
namespace exo {
class Surface;
// This class provides functions for treating a surface as a sub-surface. A
// sub-surface has one parent surface.
class SubSurface : public SurfaceDelegate, public SurfaceObserver {
public:
SubSurface(Surface* surface, Surface* parent);
~SubSurface() override;
// This schedules a sub-surface position change. The sub-surface will be
// moved so, that its origin (top-left corner pixel) will be at the |position|
// of the parent surface coordinate system.
void SetPosition(const gfx::Point& position);
// This removes sub-surface from the stack, and puts it back just above the
// reference surface, changing the z-order of the sub-surfaces. The reference
// surface must be one of the sibling surfaces, or the parent surface.
void PlaceAbove(Surface* reference);
// This removes sub-surface from the stack, and puts it back just below the
// sibling surface.
void PlaceBelow(Surface* sibiling);
// Change the commit behaviour of the sub-surface.
void SetCommitBehavior(bool synchronized);
// Returns a trace value representing the state of the surface.
scoped_refptr<base::trace_event::TracedValue> AsTracedValue() const;
// Overridden from SurfaceDelegate:
void OnSurfaceCommit() override;
bool IsSurfaceSynchronized() const override;
// Overridden from SurfaceObserver:
void OnSurfaceDestroying(Surface* surface) override;
private:
Surface* surface_;
Surface* parent_;
bool is_synchronized_;
DISALLOW_COPY_AND_ASSIGN(SubSurface);
};
} // namespace exo
#endif // COMPONENTS_EXO_SUB_SURFACE_H_
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