/*

 * 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 COMPUTER, 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 COMPUTER, 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 "PluginPackage.h"

#include "MIMETypeRegistry.h"

#include "npruntime_impl.h"

#include "PluginDatabase.h"

#include "PluginDebug.h"

#include <wtf/text/CString.h>

namespace WebCore {

typedef void gtkInitFunc(int *argc, char ***argv);

bool PluginPackage::fetchInfo()

{

    if (!load())

        return false;

    NPP_GetValueProcPtr gv = (NPP_GetValueProcPtr)m_module->resolve("NP_GetValue");

    typedef char *(*NPP_GetMIMEDescriptionProcPtr)();

    NPP_GetMIMEDescriptionProcPtr gm =

        (NPP_GetMIMEDescriptionProcPtr)m_module->resolve("NP_GetMIMEDescription");

    if (!gm || !gv)

        return false;

    char *buf = 0;

    NPError err = gv(0, NPPVpluginNameString, (void*) &buf);

    if (err != NPERR_NO_ERROR)

        return false;

    m_name = buf;

    err = gv(0, NPPVpluginDescriptionString, (void*) &buf);

    if (err != NPERR_NO_ERROR)

        return false;

    m_description = buf;

    determineModuleVersionFromDescription();

    Vector<String> types;

    for (unsigned i = 0; i < types.size(); ++i) {

        Vector<String> mime;

        types[i].split(UChar(':'), true, mime);

        if (mime.size() > 0) {

            Vector<String> exts;

            if (mime.size() > 1)

                mime[1].split(UChar(','), false, exts);

            determineQuirks(mime[0]);

            m_mimeToExtensions.add(mime[0], exts);

            if (mime.size() > 2)

                m_mimeToDescriptions.add(mime[0], mime[2]);

        }

    }

}

static NPError staticPluginQuirkRequiresGtkToolKit_NPN_GetValue(NPP instance, NPNVariable variable, void* value)

{

    if (variable == NPNVToolkit) {

        *static_cast<uint32_t*>(value) = 2;

        return NPERR_NO_ERROR;

    }

    return NPN_GetValue(instance, variable, value);

}

bool PluginPackage::load()

{

    if (m_isLoaded) {

        m_loadCount++;

        return true;

    }

    m_module = new QLibrary((QString)m_path);

    m_module->setLoadHints(QLibrary::ResolveAllSymbolsHint);

    if (!m_module->load()) {

        LOG(Plugins, "%s not loaded (%s)", m_path.utf8().data(),

                m_module->errorString().toLatin1().constData());

        return false;

    }

    m_isLoaded = true;

    NP_InitializeFuncPtr NP_Initialize;

    NPError npErr;

    gtkInitFunc* gtkInit;

    NP_Initialize = (NP_InitializeFuncPtr)m_module->resolve("NP_Initialize");

    m_NPP_Shutdown = (NPP_ShutdownProcPtr)m_module->resolve("NP_Shutdown");

    if (!NP_Initialize || !m_NPP_Shutdown)

        goto abort;

    memset(&m_pluginFuncs, 0, sizeof(m_pluginFuncs));

    m_pluginFuncs.size = sizeof(m_pluginFuncs);

    initializeBrowserFuncs();

    if (m_path.contains("npwrapper.")) {

        // nspluginwrapper relies on the toolkit value to know if glib is available

        // It does so in NP_Initialize with a null instance, therefore it is done this way:

        m_browserFuncs.getvalue = staticPluginQuirkRequiresGtkToolKit_NPN_GetValue;

    }

    // WORKAROUND: Prevent gtk based plugin crashes such as BR# 40567 by

    // explicitly forcing the initializing of Gtk, i.e. calling gtk_init,

    // whenver the symbol is present in the plugin library loaded above.

    // Note that this workaround is based on code from the NSPluginClass ctor

    // in KDE's kdebase/apps/nsplugins/viewer/nsplugin.cpp file.

    gtkInit = (gtkInitFunc*)m_module->resolve("gtk_init");

    if (gtkInit) {

        // Prevent gtk_init() from replacing the X error handlers, since the Gtk

        // handlers abort when they receive an X error, thus killing the viewer.

#ifdef Q_WS_X11

        int (*old_error_handler)(Display*, XErrorEvent*) = XSetErrorHandler(0);

        int (*old_io_error_handler)(Display*) = XSetIOErrorHandler(0);

#endif

        gtkInit(0, 0);

#ifdef Q_WS_X11

        XSetErrorHandler(old_error_handler);

        XSetIOErrorHandler(old_io_error_handler);

#endif

    }

#if defined(XP_UNIX)

    npErr = NP_Initialize(&m_browserFuncs, &m_pluginFuncs);

#else

    npErr = NP_Initialize(&m_browserFuncs);

#endif

    if (npErr != NPERR_NO_ERROR)

        goto abort;

    m_loadCount++;

    return true;

abort:

    unloadWithoutShutdown();

    return false;

}

uint16_t PluginPackage::NPVersion() const

{

    return NP_VERSION_MINOR;

}

}