Reland r114898: Add TabModalConfirmDialogDelegate.

chrome/browser/ui/tab_modal_confirm_dialog_delegate.cc

+// Copyright (c) 2011 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/tab_modal_confirm_dialog_delegate.h"
+
+#include "chrome/browser/ui/constrained_window.h"
+#include "content/browser/tab_contents/tab_contents.h"
+#include "content/public/browser/notification_source.h"
+#include "content/public/browser/notification_types.h"
+#include "grit/generated_resources.h"
+#include "ui/base/l10n/l10n_util.h"
+
+TabModalConfirmDialogDelegate::TabModalConfirmDialogDelegate(
+    TabContents* tab_contents)
+    : window_(NULL),
+      closing_(false) {
+  NavigationController* controller = &tab_contents->controller();
+  registrar_.Add(this, content::NOTIFICATION_LOAD_START,
+                 content::Source<NavigationController>(controller));
+  registrar_.Add(this, content::NOTIFICATION_TAB_CLOSING,
+                 content::Source<NavigationController>(controller));
+}
+
+TabModalConfirmDialogDelegate::~TabModalConfirmDialogDelegate() {
+  // If we end up here, the constrained window has been closed, so make sure we
+  // don't close it again.
+  window_ = NULL;
+  // Make sure everything is cleaned up.
+  Cancel();
+}
+
+void TabModalConfirmDialogDelegate::Cancel() {
+  if (closing_)
+    return;
+  OnCanceled();
+  CloseDialog();
+}
+
+void TabModalConfirmDialogDelegate::Accept() {
+  if (closing_)
+    return;
+  OnAccepted();
+  CloseDialog();
+}
+
+
+void TabModalConfirmDialogDelegate::Observe(
+    int type,
+    const content::NotificationSource& source,
+    const content::NotificationDetails& details) {
+  // Close the dialog if we load a page (because the action might not apply to
+  // the same page anymore) or if the tab is closed.
+  if (type == content::NOTIFICATION_LOAD_START ||
+      type == content::NOTIFICATION_TAB_CLOSING) {
+    Cancel();
+  } else {
+    NOTREACHED();
+  }
+}
+
+gfx::Image* TabModalConfirmDialogDelegate::GetIcon() {
+  return NULL;
+}
+
+string16 TabModalConfirmDialogDelegate::GetAcceptButtonTitle() {
+  return l10n_util::GetStringUTF16(IDS_OK);
+}
+
+string16 TabModalConfirmDialogDelegate::GetCancelButtonTitle() {
+  return l10n_util::GetStringUTF16(IDS_CANCEL);
+}
+
+const char* TabModalConfirmDialogDelegate::GetAcceptButtonIcon() {
+  return NULL;
+}
+
+const char* TabModalConfirmDialogDelegate::GetCancelButtonIcon() {
+  return NULL;
+}
+
+void TabModalConfirmDialogDelegate::OnAccepted() {
+}
+
+void TabModalConfirmDialogDelegate::OnCanceled() {
+}
+
+void TabModalConfirmDialogDelegate::CloseDialog() {
+  // Make sure we won't do anything when |Cancel()| is called again.
+  closing_ = true;
+  if (window_)
+    window_->CloseConstrainedWindow();
+}