Add chrome to the repository.

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@15 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 140 insertions, 0 deletions

diff --git a/chrome/common/notification_service.cc b/chrome/common/notification_service.cc
new file mode 100644
index 0000000..672052f
--- /dev/null
+++ b/chrome/common/notification_service.cc
@@ -0,0 +1,140 @@
+// Copyright 2008, Google Inc.
+// All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//    * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//    * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+//    * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+#include "chrome/common/notification_service.h"
+
+int NotificationService::tls_index_ = ThreadLocalStorage::Alloc();
+
+/* static */
+bool NotificationService::HasKey(const NotificationSourceMap& map,
+                                 const NotificationSource& source) {
+  return map.find(source.map_key()) != map.end();
+}
+
+NotificationService::NotificationService() {
+  DCHECK(current() == NULL);
+#ifndef NDEBUG
+  memset(observer_counts_, 0, sizeof(observer_counts_));
+#endif
+
+  ThreadLocalStorage::Set(tls_index_, this);
+}
+
+void NotificationService::AddObserver(NotificationObserver* observer,
+                                      NotificationType type,
+                                      const NotificationSource& source) {
+  DCHECK(type < NOTIFICATION_TYPE_COUNT);
+
+  NotificationObserverList* observer_list;
+  if (HasKey(observers_[type], source)) {
+    observer_list = observers_[type][source.map_key()];
+  } else {
+    observer_list = new NotificationObserverList;
+    observers_[type][source.map_key()] = observer_list;
+  }
+
+  observer_list->AddObserver(observer);
+#ifndef NDEBUG
+  ++observer_counts_[type];
+#endif
+}
+
+void NotificationService::RemoveObserver(NotificationObserver* observer,
+                                         NotificationType type,
+                                         const NotificationSource& source) {
+  DCHECK(type < NOTIFICATION_TYPE_COUNT);
+  DCHECK(HasKey(observers_[type], source));
+
+  NotificationObserverList* observer_list = observers_[type][source.map_key()];
+  if (observer_list) {
+    observer_list->RemoveObserver(observer);
+#ifndef NDEBUG
+    --observer_counts_[type];
+#endif
+  }
+
+  // TODO(jhughes): Remove observer list from map if empty?
+}
+
+void NotificationService::Notify(NotificationType type,
+                                 const NotificationSource& source,
+                                 const NotificationDetails& details) {
+  DCHECK(type > NOTIFY_ALL);  // Allowed for subscription, but not posting.
+  DCHECK(type < NOTIFICATION_TYPE_COUNT);
+
+  // There's no particular reason for the order in which the different
+  // classes of observers get notified here.
+
+  // Notify observers of all types and all sources
+  if (HasKey(observers_[NOTIFY_ALL], AllSources()) &&
+      source != AllSources())
+    FOR_EACH_OBSERVER(NotificationObserver,
+                      *observers_[NOTIFY_ALL][AllSources().map_key()],
+                      Observe(type, source, details));
+  // Notify observers of all types and the given source
+  if (HasKey(observers_[NOTIFY_ALL], source))
+    FOR_EACH_OBSERVER(NotificationObserver,
+                      *observers_[NOTIFY_ALL][source.map_key()],
+                      Observe(type, source, details));
+  // Notify observers of the given type and all sources
+  if (HasKey(observers_[type], AllSources()) &&
+      source != AllSources())
+    FOR_EACH_OBSERVER(NotificationObserver,
+                      *observers_[type][AllSources().map_key()],
+                      Observe(type, source, details));
+  // Notify observers of the given type and the given source
+  if (HasKey(observers_[type], source))
+    FOR_EACH_OBSERVER(NotificationObserver,
+                      *observers_[type][source.map_key()],
+                      Observe(type, source, details));
+}
+
+
+NotificationService::~NotificationService() {
+  ThreadLocalStorage::Set(tls_index_, NULL);
+
+#ifndef NDEBUG
+  for (int i = 0; i < NOTIFICATION_TYPE_COUNT; i++) {
+    if (observer_counts_[i] > 0) {
+      LOG(WARNING) << observer_counts_[i] << " notification observer(s) leaked"
+          << " of notification type " << i;
+    }
+  }
+#endif
+
+  for (int i = 0; i < NOTIFICATION_TYPE_COUNT; i++) {
+    NotificationSourceMap omap = observers_[i];
+    for (NotificationSourceMap::iterator it = omap.begin();
+         it != omap.end(); ++it) {
+      delete it->second;
+    }
+  }
+}
+
+NotificationObserver::~NotificationObserver() {}