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// Copyright 2023 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef UI_GFX_X_GEOMETRY_CACHE_H_
#define UI_GFX_X_GEOMETRY_CACHE_H_
#include "base/component_export.h"
#include "base/functional/callback.h"
#include "base/memory/weak_ptr.h"
#include "base/scoped_observation.h"
#include "ui/gfx/geometry/rect.h"
#include "ui/gfx/x/connection.h"
#include "ui/gfx/x/event_observer.h"
#include "ui/gfx/x/future.h"
#include "ui/gfx/x/window_event_manager.h"
#include "ui/gfx/x/xproto.h"
namespace x11 {
// Keeps track of the geometry of a window relative to the root window.
class COMPONENT_EXPORT(X11) GeometryCache final : public EventObserver {
public:
using BoundsChangedCallback =
base::RepeatingCallback<void(const std::optional<gfx::Rect>&,
const gfx::Rect&)>;
GeometryCache(Connection* connection,
Window window,
BoundsChangedCallback bounds_changed_callback);
GeometryCache(const GeometryCache&) = delete;
GeometryCache& operator=(const GeometryCache&) = delete;
~GeometryCache() override;
gfx::Rect GetBoundsPx();
private:
void OnQueryTreeResponse(QueryTreeResponse response);
void OnGetGeometryResponse(GetGeometryResponse response);
void OnParentChanged(Window parent, const gfx::Point& position);
void OnGeometryChanged(const gfx::Rect& geometry);
void OnPositionChanged(const gfx::Point& origin);
bool Ready() const;
void OnParentGeometryChanged(
const std::optional<gfx::Rect>& old_parent_bounds,
const gfx::Rect& new_parent_bounds);
void NotifyGeometryChanged();
// EventObserver:
void OnEvent(const Event& xevent) override;
const raw_ptr<Connection> connection_;
const Window window_;
const BoundsChangedCallback bounds_changed_callback_;
Future<QueryTreeReply> parent_future_;
Future<GetGeometryReply> geometry_future_;
bool have_parent_ = false;
bool have_geometry_ = false;
std::unique_ptr<GeometryCache> parent_;
gfx::Rect geometry_;
std::optional<gfx::Rect> last_notified_geometry_ = std::nullopt;
ScopedEventSelector window_events_;
base::ScopedObservation<Connection, EventObserver> scoped_observation_{this};
base::WeakPtrFactory<GeometryCache> weak_ptr_factory_{this};
};
} // namespace x11
#endif // UI_GFX_X_GEOMETRY_CACHE_H_
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