Imported WebKit commit 953baa67aa07087b6ecd4199351ec554c724e27d (http://svn.webkit.org/repository/webkit/trunk@122676)

1 files changed, 85 insertions, 0 deletions

diff --git a/Source/WebCore/dom/IdTargetObserverRegistry.cpp b/Source/WebCore/dom/IdTargetObserverRegistry.cpp
new file mode 100644
index 000000000..5fc26acfe
--- /dev/null
+++ b/Source/WebCore/dom/IdTargetObserverRegistry.cpp
@@ -0,0 +1,85 @@
+/*
+ * Copyright (C) 2012 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:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. 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.
+ *
+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``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 APPLE INC. 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 "config.h"
+#include "IdTargetObserverRegistry.h"
+
+#include "IdTargetObserver.h"
+
+namespace WebCore {
+
+PassOwnPtr<IdTargetObserverRegistry> IdTargetObserverRegistry::create()
+{
+    return adoptPtr(new IdTargetObserverRegistry());
+}
+
+void IdTargetObserverRegistry::addObserver(const AtomicString& id, IdTargetObserver* observer)
+{
+    if (id.isEmpty())
+        return;
+    
+    IdToObserverSetMap::AddResult result = m_registry.add(id.impl(), nullptr);
+    if (result.isNewEntry)
+        result.iterator->second = adoptPtr(new ObserverSet());
+
+    result.iterator->second->add(observer);
+}
+
+void IdTargetObserverRegistry::removeObserver(const AtomicString& id, IdTargetObserver* observer)
+{
+    if (id.isEmpty() || m_registry.isEmpty())
+        return;
+
+    IdToObserverSetMap::iterator iter = m_registry.find(id.impl());
+
+    ObserverSet* set = iter->second.get();
+    set->remove(observer);
+    if (set->isEmpty() && set != m_notifyingObserversInSet)
+        m_registry.remove(iter);
+}
+
+void IdTargetObserverRegistry::notifyObserversInternal(const AtomicString& id)
+{
+    ASSERT(!id.isEmpty());
+    ASSERT(!m_registry.isEmpty());
+
+    m_notifyingObserversInSet = m_registry.get(id.impl());
+    if (!m_notifyingObserversInSet)
+        return;
+
+    Vector<IdTargetObserver*> copy;
+    copyToVector(*m_notifyingObserversInSet, copy);
+    for (Vector<IdTargetObserver*>::const_iterator it = copy.begin(); it != copy.end(); ++it) {
+        if (m_notifyingObserversInSet->contains(*it))
+            (*it)->idTargetChanged();
+    }
+
+    if (m_notifyingObserversInSet->isEmpty())
+        m_registry.remove(id.impl());
+
+    m_notifyingObserversInSet = 0;
+}
+
+} // namespace WebCore