Prevent the user from triggering multiple copies of a particular exceptions w...

chrome/browser/views/options/exceptions_view.cc

 // Copyright (c) 2010 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/views/options/exceptions_view.h"
 
 #include <algorithm>
 #include <vector>
 
 #include "app/l10n_util.h"
 #include "base/gfx/rect.h"
 #include "grit/generated_resources.h"
 #include "grit/locale_settings.h"
 #include "views/controls/button/native_button.h"
 #include "views/controls/table/table_view.h"
 #include "views/grid_layout.h"
 #include "views/standard_layout.h"
 #include "views/window/window.h"
 
 static const int kExceptionsViewInsetSize = 5;
+static ExceptionsView* instances[CONTENT_SETTINGS_NUM_TYPES] = { NULL };
 
 // static
 void ExceptionsView::ShowExceptionsWindow(gfx::NativeWindow parent,
                                           HostContentSettingsMap* map,
-                                          ContentSettingsType type) {
-  views::Window::CreateChromeWindow(
-      parent, gfx::Rect(), new ExceptionsView(map, type))->Show();
+                                          ContentSettingsType content_type) {
+  if (!instances[content_type]) {
+    instances[content_type] = new ExceptionsView(map, content_type);
+    views::Window::CreateChromeWindow(parent, gfx::Rect(),
+                                      instances[content_type]);
+    // The window is alive by itself now...

[sky, 2010/02/09 21:32:24]

I don't get what this comment means.

+  }
+
+  // This will show invisible windows and bring visible windows to the front.
+  instances[content_type]->window()->Show();
 }
 
 ExceptionsView::~ExceptionsView() {
+  instances[model_.content_type()] = NULL;
   table_->SetModel(NULL);
 }
 
 void ExceptionsView::OnSelectionChanged() {
   UpdateButtonState();
 }
 
 void ExceptionsView::OnDoubleClick() {
   if (table_->SelectedRowCount() == 1)
     Edit();
@@ skipping 195 matching lines @@
   }
 
   UpdateButtonState();
 }
 
 void ExceptionsView::RemoveAll() {
   model_.RemoveAll();
 
   UpdateButtonState();
 }