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78 lines
2.7 KiB
C++
78 lines
2.7 KiB
C++
// Copyright 2016 The Chromium Embedded Framework Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be found
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// in the LICENSE file.
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#ifndef CEF_LIBCEF_BROWSER_VIEWS_LAYOUT_IMPL_H_
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#define CEF_LIBCEF_BROWSER_VIEWS_LAYOUT_IMPL_H_
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#pragma once
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#include "include/views/cef_box_layout.h"
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#include "include/views/cef_fill_layout.h"
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#include "include/views/cef_layout.h"
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#include "libcef/browser/thread_util.h"
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#include "libcef/browser/views/layout_adapter.h"
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#include "libcef/browser/views/layout_util.h"
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#include "base/logging.h"
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#include "ui/views/layout/layout_manager.h"
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#include "ui/views/view.h"
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// Base template for implementing CefLayout-derived classes. See comments in
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// view_impl.h for a usage overview.
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template <class ViewsLayoutClass, class CefLayoutClass>
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class CefLayoutImpl : public CefLayoutAdapter, public CefLayoutClass {
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public:
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// Returns the underlying views::LayoutManager object as the derived type.
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// Does not transfer ownership.
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ViewsLayoutClass* layout() const { return layout_ref_; }
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// Returns the views::View that owns this object.
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views::View* owner_view() const { return owner_view_; }
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// CefLayoutAdapter methods:
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views::LayoutManager* Get() const override { return layout(); }
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void Detach() override {
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owner_view_ = nullptr;
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layout_ref_ = nullptr;
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}
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// CefLayout methods. When adding new As*() methods make sure to update
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// CefLayoutAdapter::GetFor() in layout_adapter.cc.
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CefRefPtr<CefBoxLayout> AsBoxLayout() override { return nullptr; }
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CefRefPtr<CefFillLayout> AsFillLayout() override { return nullptr; }
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bool IsValid() override {
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CEF_REQUIRE_UIT_RETURN(false);
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return !!layout_ref_;
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}
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protected:
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// Create a new implementation object.
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// Always call Initialize() after creation.
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CefLayoutImpl() : layout_ref_(nullptr), owner_view_(nullptr) {}
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// Initialize this object and assign ownership to |owner_view|.
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void Initialize(views::View* owner_view) {
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DCHECK(owner_view);
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owner_view_ = owner_view;
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layout_ref_ = CreateLayout();
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DCHECK(layout_ref_);
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owner_view->SetLayoutManager(base::WrapUnique(layout_ref_));
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layout_util::Assign(this, owner_view);
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}
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// Create the views::LayoutManager object.
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virtual ViewsLayoutClass* CreateLayout() = 0;
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private:
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// Unowned reference to the views::LayoutManager wrapped by this object. Will
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// be nullptr after the views::LayoutManager is destroyed.
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ViewsLayoutClass* layout_ref_;
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// Unowned reference to the views::View that owns this object. Will be nullptr
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// after the views::LayoutManager is destroyed.
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views::View* owner_view_;
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};
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#endif // CEF_LIBCEF_BROWSER_VIEWS_LAYOUT_IMPL_H_
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