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// Copyright 2015 The Chromium Authors
// 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/observer_list.h"
#include "components/exo/surface_delegate.h"
#include "components/exo/surface_observer.h"
#include "third_party/abseil-cpp/absl/types/optional.h"
#include "ui/base/class_property.h"
#include "ui/gfx/geometry/point.h"
#include "ui/gfx/geometry/point_f.h"
#include "ui/gfx/geometry/rect_f.h"
#include "ui/gfx/geometry/size_f.h"
namespace base {
namespace trace_event {
class TracedValue;
}
} // namespace base
namespace exo {
class Surface;
class SubSurfaceObserver;
// 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 ui::PropertyHandler {
public:
SubSurface(Surface* surface, Surface* parent);
SubSurface(const SubSurface&) = delete;
SubSurface& operator=(const SubSurface&) = delete;
~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::PointF& position);
// This schedules a clip rect to be applied when drawing this sub-surface.
void SetClipRect(const absl::optional<gfx::RectF>& clip_rect);
// 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;
bool IsInputEnabled(Surface* surface) const override;
void OnSetFrame(SurfaceFrameType type) override {}
void OnSetFrameColors(SkColor active_color, SkColor inactive_color) override {
}
void OnSetParent(Surface* parent, const gfx::Point& position) override;
void OnSetStartupId(const char* startup_id) override {}
void OnSetApplicationId(const char* application_id) override {}
void SetUseImmersiveForFullscreen(bool value) override {}
void OnActivationRequested() override {}
void OnNewOutputAdded() override {}
void OnSetServerStartResize() override {}
void ShowSnapPreviewToPrimary() override {}
void ShowSnapPreviewToSecondary() override {}
void HideSnapPreview() override {}
void SetSnappedToPrimary() override {}
void SetSnappedToSecondary() override {}
void UnsetSnap() override {}
void SetCanGoBack() override {}
void UnsetCanGoBack() override {}
void SetPip() override {}
void UnsetPip() override {}
void SetAspectRatio(const gfx::SizeF& aspect_ratio) override {}
void MoveToDesk(int desk_index) override {}
void SetVisibleOnAllWorkspaces() override {}
void SetInitialWorkspace(const char* initial_workspace) override {}
void Pin(bool trusted) override {}
void Unpin() override {}
void SetSystemModal(bool system_modal) override {}
SecurityDelegate* GetSecurityDelegate() override;
// Overridden from SurfaceObserver:
void OnSurfaceDestroying(Surface* surface) override;
// SubSurface Observers
void AddSubSurfaceObserver(SubSurfaceObserver* observer);
void RemoveSubSurfaceObserver(SubSurfaceObserver* observer);
private:
Surface* surface_;
Surface* parent_;
bool is_synchronized_ = true;
// Surface observer list. Surface does not own the observers.
base::ObserverList<SubSurfaceObserver> observers_;
};
} // namespace exo
#endif // COMPONENTS_EXO_SUB_SURFACE_H_
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