Initial implementation of WebUI generator (WUG) toolkit.

components/wug/view.cc

+// Copyright 2015 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 "components/wug/view.h"
+
+#include "base/logging.h"
+#include "base/memory/scoped_ptr.h"
+#include "components/wug/view_model.h"
+
+namespace wug {
+
+View::View(const std::string& id)
+    : parent_(NULL),
+      id_(id),
+      ready_children_(0),
+      view_model_ready_(false),
+      ready_(false),
+      weak_factory_(this) {
+}
+
+View::~View() {
+}
+
+void View::Init() {
+  CreateAndAddChildren();
+  if (!IsRootView())
+    path_ = parent_->path() + "$";
+  path_ += id_;
+  view_model_.reset(CreateViewModel());
+  view_model_->SetView(this);
+  for (auto& id_child : children_) {
+    id_child.second->Init();
+  }
+  if (children_.empty())
+    OnChildrenReady();
+}
+
+bool View::IsRootView() const {
+  return !parent_;
+}
+
+ViewModel* View::GetViewModel() const {
+  return view_model_.get();
+}
+
+void View::OnViewModelReady() {
+  view_model_ready_ = true;
+  if (ready_children_ == static_cast<int>(children_.size()))
+    OnReady();
+}
+
+View* View::GetChild(const std::string& id) const {
+  auto it = children_.find(id);
+  if (it == children_.end())
+    return nullptr;
+  return it->second;
+}
+
+void View::OnReady() {
+  if (ready_)
+    return;
+  ready_ = true;
+  if (!IsRootView())
+    parent_->OnChildReady(this);
+}
+
+void View::UpdateContext(const base::DictionaryValue& diff) {
+  DCHECK(ready_);
+  view_model_->UpdateContext(diff);
+}
+
+void View::HandleEvent(const std::string& event) {
+  DCHECK(ready_);
+  view_model_->OnEvent(event);
+}
+
+void View::AddChild(View* child) {
+  DCHECK(children_.find(child->id()) == children_.end());
+  DCHECK(!child->id().empty());
+  children_.set(child->id(), make_scoped_ptr(child));
+  child->set_parent(this);
+}
+
+void View::OnChildReady(View* child) {
+  ++ready_children_;
+  if (ready_children_ == static_cast<int>(children_.size()))
+    OnChildrenReady();
+}
+
+void View::OnChildrenReady() {
+  view_model_->OnChildrenReady();
+  if (view_model_ready_)
+    OnReady();
+}
+
+}  // namespace wug