Create a unified UIElement interface for Widget, View and Window.

ash/devtools/view_element.cc

+// Copyright 2017 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 "ash/devtools/view_element.h"
+
+#include "ash/devtools/ui_element_delegate.h"
+#include "ui/views/widget/widget.h"
+
+namespace ash {
+namespace devtools {
+
+ViewElement::ViewElement(views::View* view,
+                         UIElementDelegate* ui_element_delegate,
+                         UIElement* parent)
+    : UIElement(UIElementType::VIEW, ui_element_delegate, parent), view_(view) {
+  view_->AddObserver(this);
+}
+
+ViewElement::~ViewElement() {
+  view_->RemoveObserver(this);
+}
+
+void ViewElement::OnChildViewRemoved(views::View* parent, views::View* view) {
+  DCHECK_EQ(parent, view_);
+  auto iter = std::find_if(
+      children().begin(), children().end(), [view](UIElement* child) {
+        return view ==
+               UIElement::GetBackingElement<views::View, ViewElement>(child);
+      });
+  DCHECK(iter != children().end());
+  UIElement* child_element = *iter;
+  RemoveChild(child_element);
+  delete child_element;
+}
+
+void ViewElement::OnChildViewAdded(views::View* parent, views::View* view) {
+  DCHECK_EQ(parent, view_);
+  AddChild(new ViewElement(view, delegate(), this),
+           children().empty() ? nullptr : children().back());
+}
+
+void ViewElement::OnChildViewReordered(views::View* parent, views::View* view) {
+  DCHECK_EQ(parent, view_);
+  auto iter = std::find_if(
+      children().begin(), children().end(), [view](UIElement* child) {
+        return view ==
+               UIElement::GetBackingElement<views::View, ViewElement>(child);
+      });
+  DCHECK(iter != children().end());
+  UIElement* child_element = *iter;
+  ReorderChild(child_element, parent->GetIndexOf(view));
+}
+
+void ViewElement::OnViewBoundsChanged(views::View* view) {
+  DCHECK_EQ(view_, view);
+  delegate()->OnUIElementBoundsChanged(this);
+}
+
+void ViewElement::GetBounds(gfx::Rect* bounds) const {
+  *bounds = view_->bounds();
+}
+
+void ViewElement::SetBounds(const gfx::Rect& bounds) {
+  view_->SetBoundsRect(bounds);
+}
+
+void ViewElement::GetVisible(bool* visible) const {
+  *visible = view_->visible();
+}
+
+void ViewElement::SetVisible(bool visible) {
+  view_->SetVisible(visible);
+}
+
+std::pair<aura::Window*, gfx::Rect> ViewElement::GetNodeWindowAndBounds()
+    const {
+  return std::make_pair(view_->GetWidget()->GetNativeWindow(), view_->bounds());
+}
+
+// static
+views::View* ViewElement::From(UIElement* element) {
+  DCHECK_EQ(UIElementType::VIEW, element->type());
+  return static_cast<ViewElement*>(element)->view_;
+}
+
+}  // namespace devtools
+}  // namespace ash