/*

 * 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 "WebCache.h"

// Instead of providing accessors, we make all members of Cache public.

// This will make it easier to track WebCore changes to the Cache class.

// FIXME: We should introduce public getters on the Cache class.

#define private public

#include "Cache.h"

#undef private

using namespace WebCore;

namespace WebKit {

// A helper method for coverting a Cache::TypeStatistic to a

// WebCache::ResourceTypeStat.

static void ToResourceTypeStat(const Cache::TypeStatistic& from,

                               WebCache::ResourceTypeStat& to)

{

    to.count = static_cast<size_t>(from.count);

    to.size = static_cast<size_t>(from.size);

    to.liveSize = static_cast<size_t>(from.liveSize);

    to.decodedSize = static_cast<size_t>(from.decodedSize);

}

void WebCache::setCapacities(

    size_t minDeadCapacity, size_t maxDeadCapacity, size_t capacity)

{

    Cache* cache = WebCore::cache();

    if (cache)

        cache->setCapacities(static_cast<unsigned int>(minDeadCapacity),

                             static_cast<unsigned int>(maxDeadCapacity),

                             static_cast<unsigned int>(capacity));

}

void WebCache::clear()

{

    Cache* cache = WebCore::cache();

    if (cache && !cache->disabled()) {

        // NOTE: I think using setDisabled() instead of setCapacities() will

        // remove from the cache items that won't actually be freed from memory

        // (due to other live references to them), so it just results in wasting

        // time later and not saving memory compared to the below technique.

        unsigned minDeadCapacity = cache->m_minDeadCapacity;

        unsigned maxDeadCapacity = cache->m_maxDeadCapacity;

        unsigned capacity = cache->m_capacity;

        cache->setCapacities(0, 0, 0);  // Will prune the cache.

        cache->setCapacities(minDeadCapacity, maxDeadCapacity, capacity);

    }

}

void WebCache::getUsageStats(UsageStats* result)

{

    ASSERT(result);

    Cache* cache = WebCore::cache();

    if (cache) {

        result->minDeadCapacity = cache->m_minDeadCapacity;

        result->maxDeadCapacity = cache->m_maxDeadCapacity;

        result->capacity = cache->m_capacity;

        result->liveSize = cache->m_liveSize;

        result->deadSize = cache->m_deadSize;

    } else

        memset(result, 0, sizeof(UsageStats));

}

void WebCache::getResourceTypeStats(ResourceTypeStats* result)

{

    Cache* cache = WebCore::cache();

    if (cache) {

        Cache::Statistics stats = cache->getStatistics();

        ToResourceTypeStat(stats.images, result->images);

        ToResourceTypeStat(stats.cssStyleSheets, result->cssStyleSheets);

        ToResourceTypeStat(stats.scripts, result->scripts);

#if ENABLE(XSLT)

        ToResourceTypeStat(stats.xslStyleSheets, result->xslStyleSheets);

#else

        memset(&result->xslStyleSheets, 0, sizeof(result->xslStyleSheets));

#endif

        ToResourceTypeStat(stats.fonts, result->fonts);

    } else

        memset(result, 0, sizeof(WebCache::ResourceTypeStats));

}

}  // namespace WebKit