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// Copyright 2019 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "base/containers/id_map.h"
#include "base/no_destructor.h"
#include "content/browser/media/desktop_media_window_registry.h"
#include "ui/aura/window.h"
#include "ui/aura/window_observer.h"
namespace content {
class DesktopMediaWindowRegistryAura final : public DesktopMediaWindowRegistry,
public aura::WindowObserver {
public:
static DesktopMediaWindowRegistryAura* GetInstance() {
static base::NoDestructor<DesktopMediaWindowRegistryAura> instance;
return instance.get();
}
DesktopMediaWindowRegistryAura() = default;
DesktopMediaWindowRegistryAura(const DesktopMediaWindowRegistryAura&) =
delete;
DesktopMediaWindowRegistryAura& operator=(
const DesktopMediaWindowRegistryAura&) = delete;
DesktopMediaID::Id RegisterWindow(gfx::NativeWindow window) final {
base::IDMap<aura::Window*>::const_iterator it(®istered_windows_);
for (; !it.IsAtEnd(); it.Advance()) {
if (it.GetCurrentValue() == window)
return it.GetCurrentKey();
}
window->AddObserver(this);
return registered_windows_.Add(window);
}
gfx::NativeWindow GetWindowById(DesktopMediaID::Id id) final {
return registered_windows_.Lookup(id);
}
private:
~DesktopMediaWindowRegistryAura() final = default;
// WindowObserver overrides.
void OnWindowDestroying(aura::Window* window) final {
base::IDMap<aura::Window*>::iterator it(®istered_windows_);
for (; !it.IsAtEnd(); it.Advance()) {
if (it.GetCurrentValue() == window) {
registered_windows_.Remove(it.GetCurrentKey());
return;
}
}
NOTREACHED();
}
base::IDMap<aura::Window*> registered_windows_;
};
// static
DesktopMediaWindowRegistry* DesktopMediaWindowRegistry::GetInstance() {
return DesktopMediaWindowRegistryAura::GetInstance();
}
} // namespace content
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