Extract a minimal subset of WebDialogUI/WebDialogDelegate from src/chrome -> src/ui/web_dialogs

ui/web_dialogs/web_dialog_ui.cc

+// Copyright (c) 2012 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 "ui/web_dialogs/web_dialog_ui.h"
+#include "ui/web_dialogs/web_dialog_delegate.h"
+
+#include "base/bind.h"
+#include "base/bind_helpers.h"
+#include "base/lazy_instance.h"
+#include "base/property_bag.h"
+#include "base/values.h"
+#include "content/public/browser/notification_service.h"
+#include "content/public/browser/render_view_host.h"
+#include "content/public/browser/web_contents.h"
+#include "content/public/browser/web_ui.h"
+#include "content/public/browser/web_ui_message_handler.h"
+#include "content/public/common/bindings_policy.h"
+#include "ui/web_dialogs/web_dialog_notification_types.h"
+
+using content::RenderViewHost;
+using content::WebUIMessageHandler;
+
+namespace web_dialogs {
+
+static base::LazyInstance<base::PropertyAccessor<WebDialogDelegate*> >
+    g_web_dialog_ui_property_accessor = LAZY_INSTANCE_INITIALIZER;
+
+WebDialogUI::WebDialogUI(content::WebUI* web_ui)
+    : WebUIController(web_ui) {
+}
+
+WebDialogUI::~WebDialogUI() {
+  // Don't unregister our property. During the teardown of the WebContents,
+  // this will be deleted, but the WebContents will already be destroyed.
+  //
+  // This object is owned indirectly by the WebContents. WebUIs can change, so
+  // it's scary if this WebUI is changed out and replaced with something else,
+  // since the property will still point to the old delegate. But the delegate
+  // is itself the owner of the WebContents for a dialog so will be in scope,
+  // and the HTML dialogs won't swap WebUIs anyway since they don't navigate.
+}
+
+void WebDialogUI::CloseDialog(const base::ListValue* args) {
+  OnDialogClosed(args);
+}
+
+// static
+base::PropertyAccessor<WebDialogDelegate*>& WebDialogUI::GetPropertyAccessor() {
+  return g_web_dialog_ui_property_accessor.Get();
+}
+
+////////////////////////////////////////////////////////////////////////////////
+// Private:
+
+void WebDialogUI::RenderViewCreated(RenderViewHost* render_view_host) {
+  // Hook up the javascript function calls, also known as chrome.send("foo")
+  // calls in the HTML, to the actual C++ functions.
+  web_ui()->RegisterMessageCallback("DialogClose",
+      base::Bind(&WebDialogUI::OnDialogClosed, base::Unretained(this)));
+
+  // Pass the arguments to the renderer supplied by the delegate.
+  std::string dialog_args;
+  std::vector<WebUIMessageHandler*> handlers;
+  WebDialogDelegate** delegate = GetPropertyAccessor().GetProperty(
+      web_ui()->GetWebContents()->GetPropertyBag());
+  if (delegate) {
+    dialog_args = (*delegate)->GetDialogArgs();
+    (*delegate)->GetWebUIMessageHandlers(&handlers);
+  }
+
+  if (0 != (web_ui()->GetBindings() & content::BINDINGS_POLICY_WEB_UI))
+    render_view_host->SetWebUIProperty("dialogArguments", dialog_args);
+  for (std::vector<WebUIMessageHandler*>::iterator it = handlers.begin();
+       it != handlers.end(); ++it) {
+    web_ui()->AddMessageHandler(*it);
+  }
+
+  content::NotificationService::current()->Notify(
+      web_dialogs::NOTIFICATION_WEB_DIALOG_SHOWN,
+      content::Source<content::WebUI>(web_ui()),
+      content::Details<RenderViewHost>(render_view_host));
+}
+
+void WebDialogUI::OnDialogClosed(const ListValue* args) {
+  WebDialogDelegate** delegate = GetPropertyAccessor().GetProperty(
+      web_ui()->GetWebContents()->GetPropertyBag());
+  if (delegate) {
+    std::string json_retval;
+    if (args && !args->empty() && !args->GetString(0, &json_retval))
+      NOTREACHED() << "Could not read JSON argument";
+
+    (*delegate)->OnDialogClosed(json_retval);
+  }
+}
+
+std::string WebDialogDelegate::GetDialogName() const {
+  return std::string();
+}
+
+void WebDialogDelegate::GetMinimumDialogSize(gfx::Size* size) const {
+  GetDialogSize(size);
+}
+
+bool WebDialogDelegate::HandleContextMenu(
+    const content::ContextMenuParams& params) {
+  return false;
+}
+
+bool WebDialogDelegate::HandleOpenURLFromTab(
+    content::WebContents* source,
+    const content::OpenURLParams& params,
+    content::WebContents** out_new_contents) {
+  return false;
+}
+
+bool WebDialogDelegate::HandleAddNewContents(
+    content::WebContents* source,
+    content::WebContents* new_contents,
+    WindowOpenDisposition disposition,
+    const gfx::Rect& initial_pos,
+    bool user_gesture) {
+  return false;
+}
+}  // namespace web_dialogs