Another stab at the Chromium side of storage events. The WebKit side can be ...

webkit/api/src/StorageEventDispatcherImpl.cpp

+/*
+ * Copyright (C) 2009 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 "config.h"
+#include "StorageEventDispatcherImpl.h"
+
+#if ENABLE(DOM_STORAGE)
+
+#include "DOMWindow.h"
+#include "EventNames.h"
+#include "Frame.h"
+#include "Page.h"
+#include "PageGroup.h"
+#include "SecurityOrigin.h"
+#include "StorageEvent.h"
+
+namespace WebCore {
+
+StorageEventDispatcherImpl::StorageEventDispatcherImpl(const String& groupName)
+    : m_pageGroup(PageGroup::pageGroup(groupName))
+{
+    ASSERT(m_pageGroup);
+}
+
+void StorageEventDispatcherImpl::dispatchStorageEvent(const String& key, const String& oldValue,
+                                                      const String& newValue, StorageType storageType,
+                                                      SecurityOrigin* securityOrigin)
+{
+    // FIXME: Implement
+    if (storageType == SessionStorage)
+        return;
+
+    // We need to copy all relevant frames from every page to a vector since sending the event to one frame might mutate the frame tree
+    // of any given page in the group or mutate the page group itself.
+    Vector<RefPtr<Frame> > frames;
+
+    const HashSet<Page*>& pages = m_pageGroup->pages();
+    HashSet<Page*>::const_iterator end = pages.end();
+    for (HashSet<Page*>::const_iterator it = pages.begin(); it != end; ++it) {
+        for (Frame* frame = (*it)->mainFrame(); frame; frame = frame->tree()->traverseNext()) {
+            if (frame->document()->securityOrigin()->equal(securityOrigin))
+                frames.append(frame);
+        }
+    }
+
+    // FIXME: Figure out how to pass in the document URI.
+    for (unsigned i = 0; i < frames.size(); ++i) {
+        frames[i]->document()->dispatchWindowEvent(StorageEvent::create(eventNames().storageEvent, key,oldValue, newValue,
+                                                                        String(), 0, frames[i]->domWindow()->localStorage()));
+    }
+}
+
+} // namespace WebCore
+
+#endif // ENABLE(DOM_STORAGE)