/*
 * Copyright (C) 2008 Apple 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 "StorageEventDispatcher.h"

#if ENABLE(DOM_STORAGE)

#include "Document.h"
#include "DOMWindow.h"
#include "EventNames.h"
#include "Frame.h"
#include "Page.h"
#include "PageGroup.h"
#include "SecurityOrigin.h"
#include "StorageEvent.h"

namespace WebCore {

void StorageEventDispatcher::dispatch(const String& key, const String& oldValue, const String& newValue, StorageType storageType, SecurityOrigin* securityOrigin, Frame* sourceFrame)
{
    Page* page = sourceFrame->page();
    if (!page)
        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;
    if (storageType == SessionStorage) {
        // Send events only to our page.
        for (Frame* frame = page->mainFrame(); frame; frame = frame->tree()->traverseNext()) {
            if (sourceFrame != frame && frame->document()->securityOrigin()->equal(securityOrigin))
                frames.append(frame);
        }

        for (unsigned i = 0; i < frames.size(); ++i) {
            ExceptionCode ec = 0;
            Storage* storage = frames[i]->domWindow()->sessionStorage(ec);
            if (!ec)
                frames[i]->document()->enqueueWindowEvent(StorageEvent::create(eventNames().storageEvent, key, oldValue, newValue, sourceFrame->document()->url(), storage));
        }
    } else {
        // Send events to every page.
        const HashSet<Page*>& pages = page->group().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 (sourceFrame != frame && frame->document()->securityOrigin()->equal(securityOrigin))
                    frames.append(frame);
            }
        }

        for (unsigned i = 0; i < frames.size(); ++i) {
            ExceptionCode ec = 0;
            Storage* storage = frames[i]->domWindow()->localStorage(ec);
            if (!ec)
                frames[i]->document()->enqueueWindowEvent(StorageEvent::create(eventNames().storageEvent, key, oldValue, newValue, sourceFrame->document()->url(), storage));
        }
    }
}

}

#endif // ENABLE(DOM_STORAGE)
