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// Copyright 2016 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.
#include "ui/gfx/win/rendering_window_manager.h"
#include "base/memory/singleton.h"
namespace gfx {
// static
RenderingWindowManager* RenderingWindowManager::GetInstance() {
return base::Singleton<RenderingWindowManager>::get();
}
void RenderingWindowManager::RegisterParent(HWND parent) {
base::AutoLock lock(lock_);
info_[parent] = nullptr;
}
bool RenderingWindowManager::RegisterChild(HWND parent, HWND child_window) {
if (!child_window)
return false;
base::AutoLock lock(lock_);
auto it = info_.find(parent);
if (it == info_.end())
return false;
if (it->second)
return false;
info_[parent] = child_window;
return true;
}
void RenderingWindowManager::DoSetParentOnChild(HWND parent) {
HWND child;
{
base::AutoLock lock(lock_);
auto it = info_.find(parent);
if (it == info_.end())
return;
if (!it->second)
return;
child = it->second;
}
::SetParent(child, parent);
}
void RenderingWindowManager::UnregisterParent(HWND parent) {
base::AutoLock lock(lock_);
info_.erase(parent);
}
bool RenderingWindowManager::HasValidChildWindow(HWND parent) {
base::AutoLock lock(lock_);
auto it = info_.find(parent);
if (it == info_.end())
return false;
return !!it->second && ::IsWindow(it->second);
}
RenderingWindowManager::RenderingWindowManager() {}
RenderingWindowManager::~RenderingWindowManager() {}
} // namespace gfx
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