Reland r114898: Add TabModalConfirmDialogDelegate.

chrome/browser/ui/cocoa/tab_modal_confirm_dialog_mac.mm

+// 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/cocoa/tab_modal_confirm_dialog_mac.h"
+
+#include "base/memory/scoped_nsobject.h"
+#include "chrome/browser/ui/browser_dialogs.h"
+#include "chrome/browser/ui/tab_modal_confirm_dialog_delegate.h"
+#include "chrome/browser/ui/tab_contents/tab_contents_wrapper.h"
+#include "ui/base/l10n/l10n_util_mac.h"
+#include "ui/gfx/image/image.h"
+
+// The delegate of the NSAlert used to display the dialog. Forwards the alert's
+// completion event to the C++ class |TabModalConfirmDialogDelegate|.
+@interface TabModalConfirmDialogMacBridge : NSObject {
+  TabModalConfirmDialogDelegate* delegate_;  // weak
+}
+- (id)initWithDelegate:(TabModalConfirmDialogDelegate*)delegate;
+- (void)alertDidEnd:(NSAlert*)alert
+         returnCode:(int)returnCode
+        contextInfo:(void*)contextInfo;
+@end
+
+@implementation TabModalConfirmDialogMacBridge
+- (id)initWithDelegate:(TabModalConfirmDialogDelegate*)delegate {
+  if ((self = [super init])) {
+    delegate_ = delegate;
+  }
+  return self;
+}
+
+- (void)alertDidEnd:(NSAlert*)alert
+         returnCode:(int)returnCode
+        contextInfo:(void*)contextInfo {
+  if (returnCode == NSAlertFirstButtonReturn) {
+    delegate_->Accept();
+  } else {
+    delegate_->Cancel();
+  }
+}
+@end
+
+namespace browser {
+
+// Declared in browser_dialogs.h so others don't have to depend on our header.
+void ShowTabModalConfirmDialog(TabModalConfirmDialogDelegate* delegate,
+                               TabContentsWrapper* wrapper) {
+  // Deletes itself when closed.
+  new TabModalConfirmDialogMac(delegate, wrapper);
+}
+
+}
+
+TabModalConfirmDialogMac::TabModalConfirmDialogMac(
+    TabModalConfirmDialogDelegate* delegate,
+    TabContentsWrapper* wrapper)
+    : ConstrainedWindowMacDelegateSystemSheet(
+        [[[TabModalConfirmDialogMacBridge alloc] initWithDelegate:delegate]
+            autorelease],
+        @selector(alertDidEnd:returnCode:contextInfo:)),
+      delegate_(delegate) {
+  scoped_nsobject<NSAlert> alert([[NSAlert alloc] init]);
+  [alert setMessageText:
+      l10n_util::FixUpWindowsStyleLabel(delegate->GetTitle())];
+  [alert setInformativeText:
+      l10n_util::FixUpWindowsStyleLabel(delegate->GetMessage())];
+  [alert addButtonWithTitle:
+      l10n_util::FixUpWindowsStyleLabel(delegate->GetAcceptButtonTitle())];
+  [alert addButtonWithTitle:
+      l10n_util::FixUpWindowsStyleLabel(delegate->GetCancelButtonTitle())];
+  gfx::Image* icon = delegate->GetIcon();
+  if (icon)
+    [alert setIcon:icon->ToNSImage()];
+
+  set_sheet(alert);
+
+  delegate->set_window(new ConstrainedWindowMac(wrapper, this));
+}
+
+TabModalConfirmDialogMac::~TabModalConfirmDialogMac() {
+  NSWindow* window = [(NSAlert*)sheet() window];
+  if (window && is_sheet_open()) {
+    [NSApp endSheet:window
+         returnCode:NSAlertSecondButtonReturn];
+  }
+}
+
+// "DeleteDelegate" refers to this class being a ConstrainedWindow delegate
+// and deleting itself, not to deleting the member variable |delegate_|.
+void TabModalConfirmDialogMac::DeleteDelegate() {
+  delete this;
+}