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// Copyright 2020 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 UI_OZONE_PLATFORM_WAYLAND_HOST_WAYLAND_SUBSURFACE_H_
#define UI_OZONE_PLATFORM_WAYLAND_HOST_WAYLAND_SUBSURFACE_H_
#include "base/containers/linked_list.h"
#include "base/memory/raw_ptr.h"
#include "ui/gfx/native_widget_types.h"
#include "ui/ozone/platform/wayland/common/wayland_object.h"
#include "ui/ozone/platform/wayland/host/wayland_surface.h"
namespace ui {
class WaylandConnection;
class WaylandWindow;
// Wraps a wl_surface with a wl_subsurface role assigned. It is used to submit a
// buffer as a sub region of WaylandWindow.
//
// Inherits base::LinkNode<> s.t. it's location in the subsurface stack can be
// tracked and prevent us from sending excessive wl_subsurface.place_below/above
// requests.
class WaylandSubsurface : public base::LinkNode<WaylandSubsurface> {
public:
WaylandSubsurface(WaylandConnection* connection, WaylandWindow* parent);
WaylandSubsurface(const WaylandSubsurface&) = delete;
WaylandSubsurface& operator=(const WaylandSubsurface&) = delete;
~WaylandSubsurface();
wl_surface* surface() const { return wayland_surface_.surface(); }
WaylandSurface* wayland_surface() { return &wayland_surface_; }
gfx::AcceleratedWidget GetWidget() const;
// Sets up wl_subsurface by setting the surface location coordinates and the
// stacking order of this subsurface.
// |bounds_px|: The pixel bounds of this subsurface content in
// display::Display coordinates used by chrome.
// |parent_bounds_px|: Same as |bounds_px| but for the parent surface.
// |buffer_scale|: the scale factor of the next attached buffer.
// |reference_below| & |reference_above|: this subsurface is taken from the
// subsurface stack and inserted back to be immediately below/above the
// reference subsurface.
void ConfigureAndShowSurface(const gfx::RectF& bounds_px,
const gfx::RectF& parent_bounds_px,
float buffer_scale,
WaylandSubsurface* reference_below,
WaylandSubsurface* reference_above);
// Assigns wl_subsurface role to the wl_surface so it is visible when a
// wl_buffer is attached.
void Show();
// Remove wl_subsurface role to make this invisible.
void Hide();
bool IsVisible() const;
private:
// Helper of Show(). It does the role-assigning to wl_surface.
void CreateSubsurface();
WaylandSurface wayland_surface_;
wl::Object<wl_subsurface> subsurface_;
wl::Object<augmented_sub_surface> augmented_subsurface_;
gfx::PointF position_dip_;
const raw_ptr<WaylandConnection> connection_;
// |parent_| refers to the WaylandWindow whose wl_surface is the parent to
// this subsurface.
const raw_ptr<WaylandWindow> parent_;
};
} // namespace ui
#endif // UI_OZONE_PLATFORM_WAYLAND_HOST_WAYLAND_SUBSURFACE_H_
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