Refactor AppModalDialogQueue and move JS Alert boxes into a MVC.

chrome/browser/app_modal_dialog.cc

+// Copyright (c) 2009 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/app_modal_dialog.h"
+
+#include "chrome/browser/app_modal_dialog_queue.h"
+#include "chrome/browser/tab_contents/web_contents.h"
+#include "chrome/common/notification_service.h"
+#include "chrome/common/notification_type.h"
+#include "chrome/common/ipc_message.h"
+
+AppModalDialog::AppModalDialog(WebContents* web_contents,
+                               const std::wstring& title,
+                               int dialog_flags,
+                               const std::wstring& message_text,
+                               const std::wstring& default_prompt_text,
+                               bool display_suppress_checkbox,
+                               bool is_before_unload_dialog,
+                               IPC::Message* reply_msg)
+    : web_contents_(web_contents),
+      title_(title),
+      dialog_flags_(dialog_flags),
+      message_text_(message_text),
+      default_prompt_text_(default_prompt_text),
+      display_suppress_checkbox_(display_suppress_checkbox),
+      is_before_unload_dialog_(is_before_unload_dialog),
+      reply_msg_(reply_msg) {
+  InitNotifications();
+}
+
+void AppModalDialog::Observe(NotificationType type,
+                             const NotificationSource& source,
+                             const NotificationDetails& details) {
+  if (!web_contents_)
+    return;
+
+  if (type == NotificationType::NAV_ENTRY_COMMITTED &&
+      Source<NavigationController>(source).ptr() == web_contents_->controller())
+    web_contents_ = NULL;
+
+  if (type == NotificationType::TAB_CONTENTS_DESTROYED &&
+      Source<TabContents>(source).ptr() ==
+      static_cast<TabContents*>(web_contents_))
+    web_contents_ = NULL;
+
+  if (!web_contents_)
+    CloseModalDialog();
+}
+
+void AppModalDialog::InitNotifications() {
+  // Make sure we get navigation notifications so we know when our parent
+  // contents will disappear or navigate to a different page.
+  registrar_.Add(this, NotificationType::NAV_ENTRY_COMMITTED,
+                 NotificationService::AllSources());
+  registrar_.Add(this, NotificationType::TAB_CONTENTS_DESTROYED,
+                 NotificationService::AllSources());
+}
+
+void AppModalDialog::ShowModalDialog() {
+  // If the WebContents that created this dialog navigated away before this
+  // dialog became visible, simply show the next dialog if any.
+  if (!web_contents_) {
+    AppModalDialogQueue::ShowNextDialog();
+    delete this;
+    return;
+  }
+
+  web_contents_->Activate();
+  CreateAndShowDialog();
+}
+
+void AppModalDialog::OnCancel() {
+  // We need to do this before WM_DESTROY (WindowClosing()) as any parent frame
+  // will receive it's activation messages before this dialog receives
+  // WM_DESTROY. The parent frame would then try to activate any modal dialogs
+  // that were still open in the ModalDialogQueue, which would send activation
+  // back to this one. The framework should be improved to handle this, so this
+  // is a temporary workaround.
+  AppModalDialogQueue::ShowNextDialog();
+
+  if (web_contents_) {
+    web_contents_->OnJavaScriptMessageBoxClosed(reply_msg_, false,
+                                                std::wstring());
+  }
+}
+
+void AppModalDialog::OnAccept(const std::wstring& prompt_text,
+                              bool suppress_js_messages) {
+  AppModalDialogQueue::ShowNextDialog();
+
+  if (web_contents_) {
+    web_contents_->OnJavaScriptMessageBoxClosed(reply_msg_, true,
+                                                prompt_text);
+
+    if (suppress_js_messages)
+      web_contents()->set_suppress_javascript_messages(true);
+  }
+}