/*
 * Copyright (C) 2006, 2007 Apple Inc.  All rights reserved.
 * Copyright (C) 2008 Collabora, Ltd.  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.
 */

#ifndef PluginPackage_h
#define PluginPackage_h

#include "PlatformModule.h"
#include "PluginQuirkSet.h"
#include <WebCore/Timer.h>
#include <wtf/FileSystem.h>
#include <wtf/HashMap.h>
#include <wtf/RefCounted.h>
#include <wtf/text/StringHash.h>
#include <wtf/text/WTFString.h>

#if ENABLE(NETSCAPE_PLUGIN_API)
#include <WebCore/npruntime_internal.h>
#endif

namespace WebCore {

    typedef HashMap<String, String, ASCIICaseInsensitiveHash> MIMEToDescriptionsMap;
    typedef HashMap<String, Vector<String>, ASCIICaseInsensitiveHash> MIMEToExtensionsMap;

    class PluginPackage : public RefCounted<PluginPackage> {
    public:
        ~PluginPackage();
        static RefPtr<PluginPackage> createPackage(const String& path, const time_t& lastModified);
#if ENABLE(NETSCAPE_PLUGIN_METADATA_CACHE)
        static Ref<PluginPackage> createPackageFromCache(const String& path, const time_t& lastModified, const String& name, const String& description, const String& mimeDescription);
#endif

        const String& name() const { return m_name; }
        const String& description() const { return m_description; }
        const String& path() const { return m_path; }
        const String& fileName() const { return m_fileName; }
        const String& parentDirectory() const { return m_parentDirectory; }
        PlatformModule module() const { return m_module; }
        uint16_t NPVersion() const;
        time_t lastModified() const { return m_lastModified; }

        const MIMEToDescriptionsMap& mimeToDescriptions() const { return m_mimeToDescriptions; }
        const MIMEToExtensionsMap& mimeToExtensions() const { return m_mimeToExtensions; }

        unsigned hash() const;
        static bool equal(const PluginPackage& a, const PluginPackage& b);

        bool load();
        void unload();
        void unloadWithoutShutdown();

        bool isEnabled() const { return m_isEnabled; }
        void setEnabled(bool);

#if ENABLE(NETSCAPE_PLUGIN_API)
        const NPPluginFuncs* pluginFuncs() const { return &m_pluginFuncs; }
#endif
        int compareFileVersion(const PlatformModuleVersion&) const;
        int compare(const PluginPackage&) const;
        PluginQuirkSet quirks() const { return m_quirks; }
        const PlatformModuleVersion& version() const { return m_moduleVersion; }

#if ENABLE(NETSCAPE_PLUGIN_METADATA_CACHE)
        bool ensurePluginLoaded();
        void setMIMEDescription(const String& mimeDescription);
        String fullMIMEDescription() const { return m_fullMIMEDescription;}
#endif
    private:
        PluginPackage(const String& path, const time_t& lastModified);

        bool fetchInfo();
        bool isPluginBlacklisted();
        void determineQuirks(const String& mimeType);

        void determineModuleVersionFromDescription();
        void initializeBrowserFuncs();

        bool m_isEnabled;
        bool m_isLoaded;
        int m_loadCount;

        String m_description;
        String m_path;
        String m_fileName;
        String m_name;
        String m_parentDirectory;

        PlatformModuleVersion m_moduleVersion;

        MIMEToDescriptionsMap m_mimeToDescriptions;
        MIMEToExtensionsMap m_mimeToExtensions;

        PlatformModule m_module;
        time_t m_lastModified;

#if ENABLE(NETSCAPE_PLUGIN_API)
        NPP_ShutdownProcPtr m_NPP_Shutdown;
        NPPluginFuncs m_pluginFuncs;
        NPNetscapeFuncs m_browserFuncs;
#endif

        void freeLibrarySoon();
        void freeLibraryTimerFired();
        Timer m_freeLibraryTimer;

        PluginQuirkSet m_quirks;
#if ENABLE(NETSCAPE_PLUGIN_METADATA_CACHE)
        String m_fullMIMEDescription;
        bool m_infoIsFromCache;
#endif
    };

    // FIXME: This is a workaround because PluginPackageHash is broken and may consider keys with different hashes as equal.
    struct PluginPackageHashTraits : HashTraits<RefPtr<PluginPackage> > {
        static const int minimumTableSize = 64;
    };

    struct PluginPackageHash {
        static unsigned hash(const uintptr_t key) { return reinterpret_cast<PluginPackage*>(key)->hash(); }
        static unsigned hash(const RefPtr<PluginPackage>& key) { return key->hash(); }

        static bool equal(const uintptr_t a, const uintptr_t b) { return equal(reinterpret_cast<PluginPackage*>(a), reinterpret_cast<PluginPackage*>(b)); }
        static bool equal(const RefPtr<PluginPackage>& a, const RefPtr<PluginPackage>& b) { return PluginPackage::equal(*a.get(), *b.get()); }
        static const bool safeToCompareToEmptyOrDeleted = false;
    };

} // namespace WebCore

#endif