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// Copyright 2012 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_WM_CORE_CAPTURE_CONTROLLER_H_
#define UI_WM_CORE_CAPTURE_CONTROLLER_H_
#include <map>
#include "base/component_export.h"
#include "base/memory/raw_ptr.h"
#include "base/observer_list.h"
#include "ui/aura/client/capture_client.h"
#include "ui/aura/window_observer.h"
namespace aura {
namespace client {
class CaptureDelegate;
}
}
namespace wm {
// Internal CaptureClient implementation. See ScopedCaptureClient for details.
class COMPONENT_EXPORT(UI_WM) CaptureController
: public aura::client::CaptureClient {
public:
CaptureController();
CaptureController(const CaptureController&) = delete;
CaptureController& operator=(const CaptureController&) = delete;
~CaptureController() override;
static CaptureController* Get() { return instance_; }
// Adds |root| to the list of root windows notified when capture changes.
void Attach(aura::Window* root);
// Removes |root| from the list of root windows notified when capture changes.
void Detach(aura::Window* root);
// Resets the current capture window and prevents it from being set again.
void PrepareForShutdown();
// Returns true if this CaptureController is installed on at least one
// root window.
bool is_active() const { return !delegates_.empty(); }
// Overridden from aura::client::CaptureClient:
void SetCapture(aura::Window* window) override;
void ReleaseCapture(aura::Window* window) override;
aura::Window* GetCaptureWindow() override;
aura::Window* GetGlobalCaptureWindow() override;
void AddObserver(aura::client::CaptureClientObserver* observer) override;
void RemoveObserver(aura::client::CaptureClientObserver* observer) override;
private:
friend class ScopedCaptureClient;
static CaptureController* instance_;
// Set to true by `PrepareForShutdown()`. If this is true, `SetCapture()` will
// have no effect.
bool destroying_ = false;
// The current capture window. NULL if there is no capture window.
raw_ptr<aura::Window> capture_window_;
// The capture delegate for the root window with native capture. The root
// window with native capture may not contain |capture_window_|. This occurs
// if |capture_window_| is reparented to a different root window while it has
// capture.
raw_ptr<aura::client::CaptureDelegate> capture_delegate_;
// The delegates notified when capture changes.
std::map<aura::Window*,
raw_ptr<aura::client::CaptureDelegate, CtnExperimental>>
delegates_;
base::ObserverList<aura::client::CaptureClientObserver>::Unchecked observers_;
};
// ScopedCaptureClient is responsible for creating a CaptureClient for a
// RootWindow. Specifically it creates a single CaptureController that is shared
// among all ScopedCaptureClients and adds the RootWindow to it.
class COMPONENT_EXPORT(UI_WM) ScopedCaptureClient
: public aura::WindowObserver {
public:
class COMPONENT_EXPORT(UI_WM) TestApi {
public:
explicit TestApi(ScopedCaptureClient* client) : client_(client) {}
TestApi(const TestApi&) = delete;
TestApi& operator=(const TestApi&) = delete;
~TestApi() {}
// Sets the delegate.
void SetDelegate(aura::client::CaptureDelegate* delegate);
private:
// Not owned.
raw_ptr<ScopedCaptureClient> client_;
};
explicit ScopedCaptureClient(aura::Window* root);
ScopedCaptureClient(const ScopedCaptureClient&) = delete;
ScopedCaptureClient& operator=(const ScopedCaptureClient&) = delete;
~ScopedCaptureClient() override;
// Overridden from aura::WindowObserver:
void OnWindowDestroyed(aura::Window* window) override;
private:
// Invoked from destructor and OnWindowDestroyed() to cleanup.
void Shutdown();
// RootWindow this ScopedCaptureClient was create for.
raw_ptr<aura::Window> root_window_;
};
} // namespace wm
#endif // UI_WM_CORE_CAPTURE_CONTROLLER_H_
|
