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

chrome/browser/ui/webui/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 "chrome/browser/ui/webui/web_dialog_ui.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 "chrome/common/chrome_notification_types.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"
-
-using content::RenderViewHost;
-using content::WebUIMessageHandler;
-
-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(
-      chrome::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);
-  }
-}
-
-ExternalWebDialogUI::ExternalWebDialogUI(content::WebUI* web_ui)
-    : WebDialogUI(web_ui) {
-  // Non-file based UI needs to not have access to the Web UI bindings
-  // for security reasons. The code hosting the dialog should provide
-  // dialog specific functionality through other bindings and methods
-  // that are scoped in duration to the dialogs existence.
-  web_ui->SetBindings(web_ui->GetBindings() & ~content::BINDINGS_POLICY_WEB_UI);
-}
-
-ExternalWebDialogUI::~ExternalWebDialogUI() {
-}
-
-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;
-}