| // 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 <memory> |
| |
| #include "base/macros.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. |
| std::unique_ptr<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_ = true; |
| |
| DISALLOW_COPY_AND_ASSIGN(SubSurface); |
| }; |
| |
| } // namespace exo |
| |
| #endif // COMPONENTS_EXO_SUB_SURFACE_H_ |