blob: 305438d5e220052d255de01f9fc9e45c0e837643 [file] [log] [blame]
// Copyright 2016 The Chromium Embedded Framework 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 "libcef/browser/views/layout_util.h"
#include <utility>
#include "libcef/browser/views/layout_adapter.h"
#include "ui/views/view.h"
namespace layout_util {
namespace {
// Manages the association between views::View and CefLayout instances.
class UserData : public base::SupportsUserData::Data {
static CefRefPtr<CefLayout> GetFor(const views::View* view) {
UserData* data = static_cast<UserData*>(view->GetUserData(UserDataKey()));
if (data)
return data->layout_;
return nullptr;
// Assign ownership of the underlying views::LayoutManager to |owner_view|.
// The views::View that owns the views::LayoutManager will gain a ref-counted
// reference to the CefLayout and the CefLayout will keep an unowned reference
// to the views::LayoutManager. Destruction of the views::View will release
// the reference to the CefLayout.
static void Assign(CefRefPtr<CefLayout> cef_layout, views::View* owner_view) {
views::LayoutManager* layout = CefLayoutAdapter::GetFor(cef_layout)->Get();
// The CefLayout previously associated with |owner_view|, if any, will be
// destroyed by this call.
base::WrapUnique(new UserData(cef_layout)));
friend std::default_delete<UserData>;
explicit UserData(CefRefPtr<CefLayout> cef_layout) : layout_(cef_layout) {
~UserData() override { CefLayoutAdapter::GetFor(layout_)->Detach(); }
static void* UserDataKey() {
// We just need a unique constant. Use the address of a static that
// COMDAT folding won't touch in an optimizing linker.
static int data_key = 0;
return reinterpret_cast<void*>(&data_key);
CefRefPtr<CefLayout> layout_;
} // namespace
CefRefPtr<CefLayout> GetFor(const views::View* view) {
return UserData::GetFor(view);
void Assign(CefRefPtr<CefLayout> layout, views::View* owner_view) {
return UserData::Assign(layout, owner_view);
} // namespace layout_util