Initial implementation of WebUI generator (WUG) toolkit.

components/webui_generator/web_ui_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/webui_generator/web_ui_view.h"
+
+#include "base/bind_helpers.h"
+#include "base/memory/scoped_ptr.h"
+#include "components/login/localized_values_builder.h"
+#include "components/webui_generator/data_source_util.h"
+#include "components/webui_generator/view_model.h"
+
+namespace {
+
+const char kEventCallback[] = "eventFired";
+const char kContextChangedCallback[] = "contextChanged";
+const char kReadyCallback[] = "ready";
+
+const char kMethodContextChanged[] = "contextChanged";
+
+}  // namespace
+
+namespace webui_generator {
+
+WebUIView::WebUIView(content::WebUI* web_ui, const std::string& id)
+    : View(id), web_ui_(web_ui), html_ready_(false), view_bound_(false) {
+}
+
+WebUIView::~WebUIView() {
+}
+
+void WebUIView::Init() {
+  View::Init();
+  AddCallback(path() + "$" + kEventCallback, &WebUIView::HandleEvent);
+  AddCallback(path() + "$" + kContextChangedCallback,
+              &WebUIView::HandleContextChanged);
+  AddCallback(path() + "$" + kReadyCallback, &WebUIView::HandleHTMLReady);
+}
+
+void WebUIView::SetUpDataSource(content::WebUIDataSource* data_source) {
+  DCHECK(IsRootView());
+  webui_generator::SetUpDataSource(data_source);
+  ResourcesMap* resources_map = new ResourcesMap();
+  SetUpDataSourceInternal(data_source, resources_map);
+  data_source->SetRequestFilter(base::Bind(&WebUIView::HandleDataRequest,
+                                           base::Unretained(this),
+                                           base::Owned(resources_map)));
+}
+
+void WebUIView::OnReady() {
+  View::OnReady();
+  if (html_ready_)
+    Bind();
+}
+
+void WebUIView::OnContextChanged(const base::DictionaryValue& diff) {
+  if (view_bound_)
+    web_ui_->CallJavascriptFunction(path() + "$" + kMethodContextChanged, diff);
+
+  if (!pending_context_changes_)
+    pending_context_changes_.reset(new Context());
+
+  pending_context_changes_->ApplyChanges(diff, nullptr);
+}
+
+void WebUIView::SetUpDataSourceInternal(content::WebUIDataSource* data_source,
+                                        ResourcesMap* resources_map) {
+  base::DictionaryValue strings;
+  auto builder = make_scoped_ptr(
+      new ::login::LocalizedValuesBuilder(GetType() + "$", &strings));
+  AddLocalizedValues(builder.get());
+  data_source->AddLocalizedStrings(strings);
+  AddResources(resources_map);
+  for (auto& id_child : children()) {
+    static_cast<WebUIView*>(id_child.second)
+        ->SetUpDataSourceInternal(data_source, resources_map);
+  }
+}
+
+bool WebUIView::HandleDataRequest(
+    const ResourcesMap* resources,
+    const std::string& path,
+    const content::WebUIDataSource::GotDataCallback& got_data_callback) {
+  auto it = resources->find(path);
+
+  if (it == resources->end())
+    return false;
+
+  got_data_callback.Run(it->second.get());
+  return true;
+}
+
+void WebUIView::HandleHTMLReady() {
+  html_ready_ = true;
+  if (ready())
+    Bind();
+}
+
+void WebUIView::HandleContextChanged(const base::DictionaryValue* diff) {
+  UpdateContext(*diff);
+}
+
+void WebUIView::Bind() {
+  view_bound_ = true;
+  if (pending_context_changes_)
+    OnContextChanged(pending_context_changes_->storage());
+
+  GetViewModel()->OnViewBound();
+}
+
+}  // namespace webui_generator