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

ash/devtools/ui_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/ui_element.h"
-
-#include <algorithm>
-
-#include "ash/devtools/ui_element_delegate.h"
-#include "ash/devtools/view_element.h"
-#include "ash/devtools/widget_element.h"
-#include "ash/devtools/window_element.h"
-
-namespace ash {
-namespace devtools {
-namespace {
-
-static int node_ids = 0;
-
-}  // namespace
-
-UIElement::~UIElement() {
-  for (auto* child : children_)
-    delete child;
-  children_.clear();
-}
-
-std::string UIElement::GetTypeName() const {
-  switch (type_) {
-    case UIElementType::WINDOW:
-      return "Window";
-    case UIElementType::WIDGET:
-      return "Widget";
-    case UIElementType::VIEW:
-      return "View";
-  }
-}
-
-void UIElement::AddChild(UIElement* child, UIElement* before) {
-  if (before) {
-    auto iter = std::find(children_.begin(), children_.end(), before);
-    DCHECK(iter != children_.end());
-    children_.insert(iter, child);
-  } else {
-    children_.push_back(child);
-  }
-  delegate_->OnUIElementAdded(this, child);
-}
-
-void UIElement::RemoveChild(UIElement* child) {
-  delegate()->OnUIElementRemoved(child);
-  auto iter = std::find(children_.begin(), children_.end(), child);
-  DCHECK(iter != children_.end());
-  children_.erase(iter);
-}
-
-void UIElement::ReorderChild(UIElement* child, int new_index) {
-  // Remove |child| out of vector |children_|.
-  auto iter = std::find(children_.begin(), children_.end(), child);
-  DCHECK(iter != children_.end());
-  children_.erase(iter);
-
-  // Move child to new position |new_index| in vector |children_|.
-  new_index = std::min(children_.size() - 1, static_cast<size_t>(new_index));
-  iter = children_.begin() + new_index;
-  children_.insert(iter, child);
-  delegate()->OnUIElementReordered(child->parent(), child);
-}
-
-UIElement::UIElement(const UIElementType type,
-                     UIElementDelegate* delegate,
-                     UIElement* parent)
-    : node_id_(++node_ids), type_(type), parent_(parent), delegate_(delegate) {
-  delegate_->OnUIElementAdded(0, this);
-}
-
-}  // namespace devtools
-}  // namespace ash