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IcedTeaPluginRequestProcessor.cc

/* IcedTeaPluginRequestProcessor.cc

   Copyright (C) 2009, 2010  Red Hat

This file is part of IcedTea.

IcedTea is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2, or (at your option)
any later version.

IcedTea is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
General Public License for more details.

You should have received a copy of the GNU General Public License
along with IcedTea; see the file COPYING.  If not, write to the
Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
02110-1301 USA.

Linking this library statically or dynamically with other modules is
making a combined work based on this library.  Thus, the terms and
conditions of the GNU General Public License cover the whole
combination.

As a special exception, the copyright holders of this library give you
permission to link this library with independent modules to produce an
executable, regardless of the license terms of these independent
modules, and to copy and distribute the resulting executable under
terms of your choice, provided that you also meet, for each linked
independent module, the terms and conditions of the license of that
module.  An independent module is a module which is not derived from
or based on this library.  If you modify this library, you may extend
this exception to your version of the library, but you are not
obligated to do so.  If you do not wish to do so, delete this
exception statement from your version. */

#include <typeinfo>

#include "IcedTeaScriptablePluginObject.h"
#include "IcedTeaNPPlugin.h"
#include "IcedTeaPluginRequestProcessor.h"

/*
 * This class processes requests made by Java. The requests include pointer
 * information, script execution and variable get/set
 */

// Initialize static members used by the queue processing framework
pthread_mutex_t message_queue_mutex = PTHREAD_MUTEX_INITIALIZER;
pthread_mutex_t syn_write_mutex = PTHREAD_MUTEX_INITIALIZER;
std::vector< std::vector<std::string*>* >* message_queue = new std::vector< std::vector<std::string*>* >();

/**
 * PluginRequestProcessor constructor.
 *
 * Initializes various complex data structures used by the class.
 */

00061 PluginRequestProcessor::PluginRequestProcessor()
{
    this->pendingRequests = new std::map<pthread_t, uintmax_t>();

    internal_req_ref_counter = 0;
}

/**
 * PluginRequestProcessor destructor.
 *
 * Frees memory used by complex objects.
 */

00074 PluginRequestProcessor::~PluginRequestProcessor()
{
    PLUGIN_DEBUG("PluginRequestProcessor::~PluginRequestProcessor\n");

    if (pendingRequests)
        delete pendingRequests;
}

/**
 * Processes plugin (C++ side) requests from the Java side, and internally.
 *
 * @param message The message request to process
 * @return boolean indicating whether the message is serviceable by this object
 */

bool
00090 PluginRequestProcessor::newMessageOnBus(const char* message)
{
    PLUGIN_DEBUG("PluginRequestProcessor processing %s\n", message);

    std::string* type;
    std::string* command;
    int counter = 0;

    std::vector<std::string*>* message_parts = IcedTeaPluginUtilities::strSplit(message, " ");

    std::vector<std::string*>::iterator the_iterator;
    the_iterator = message_parts->begin();

    IcedTeaPluginUtilities::printStringPtrVector("PluginRequestProcessor::newMessageOnBus:", message_parts);

    type = message_parts->at(0);
    command = message_parts->at(4);

    if (!type->find("instance"))
    {
        if (!command->find("GetWindow"))
        {
            // Window can be queried from the main thread only. And this call
            // returns immediately, so we do it in the same thread.
            this->sendWindow(message_parts);
            return true;
        } else if (!command->find("GetMember") ||
                   !command->find("SetMember") ||
                   !command->find("ToString") ||
                   !command->find("Call") ||
                   !command->find("GetSlot") ||
                   !command->find("SetSlot") ||
                   !command->find("Eval") ||
                   !command->find("Finalize"))
        {

            // Update queue synchronously
            pthread_mutex_lock(&message_queue_mutex);
            message_queue->push_back(message_parts);
            pthread_mutex_unlock(&message_queue_mutex);

            // Broadcast that a message is now available
            pthread_cond_broadcast(&cond_message_available);

            return true;
        }

    }

    IcedTeaPluginUtilities::freeStringPtrVector(message_parts);

    // If we got here, it means we couldn't process the message. Let the caller know.
    return false;
}

/**
 * Sends the window pointer to the Java side.
 *
 * @param message_parts The request message.
 */

void
00152 PluginRequestProcessor::sendWindow(std::vector<std::string*>* message_parts)
{
    std::string* type;
    std::string* command;
    int reference;
    std::string response = std::string();
    std::string window_ptr_str = std::string();
    NPVariant* variant = new NPVariant();
    static NPObject* window_ptr;
    int id;

    type = message_parts->at(0);
    id = atoi(message_parts->at(1)->c_str());
    reference = atoi(message_parts->at(3)->c_str());
    command = message_parts->at(4);

    NPP instance;
    get_instance_from_id(id, instance);

    browser_functions.getvalue(instance, NPNVWindowNPObject, &window_ptr);
    PLUGIN_DEBUG("ID=%d, Instance=%p, WindowPTR = %p\n", id, instance, window_ptr);

    OBJECT_TO_NPVARIANT(window_ptr, *variant);
    browser_functions.retainobject(window_ptr);
    IcedTeaPluginUtilities::JSIDToString(variant, &window_ptr_str);

    // We need the context 0 for backwards compatibility with the Java side
    IcedTeaPluginUtilities::constructMessagePrefix(0, reference, &response);
    response += " JavaScriptGetWindow ";
    response += window_ptr_str;

    plugin_to_java_bus->post(response.c_str());

    // store the instance pointer for future reference
    IcedTeaPluginUtilities::storeInstanceID(variant, instance);
}

/**
 * Evaluates the given script
 *
 * @param message_parts The request message.
 */

void
00196 PluginRequestProcessor::eval(std::vector<std::string*>* message_parts)
{
    JavaRequestProcessor request_processor = JavaRequestProcessor();
    JavaResultData* java_result;

    NPVariant* window_ptr;
    NPP instance;
    std::string script;
    NPVariant result;
    int reference;
    std::string response = std::string();
    std::string return_type = std::string();
    int id;

    reference = atoi(message_parts->at(3)->c_str());
    window_ptr = (NPVariant*) IcedTeaPluginUtilities::stringToJSID(message_parts->at(5));
    instance = IcedTeaPluginUtilities::getInstanceFromMemberPtr(window_ptr);

    java_result = request_processor.getString(*(message_parts->at(6)));
    CHECK_JAVA_RESULT(java_result);
    script.append(*(java_result->return_string));

    AsyncCallThreadData thread_data = AsyncCallThreadData();
    thread_data.result_ready = false;
    thread_data.parameters = std::vector<void*>();
    thread_data.result = std::string();

    thread_data.parameters.push_back(instance);
    thread_data.parameters.push_back(NPVARIANT_TO_OBJECT(*window_ptr));
    thread_data.parameters.push_back(&script);

#ifdef CHROMIUM_WORKAROUND
    // Workaround for chromium
    _eval(&thread_data);

    if (!thread_data.call_successful)
    {
#endif
        thread_data.result_ready = false;
        browser_functions.pluginthreadasynccall(instance, &_eval, &thread_data);

        while (!thread_data.result_ready) usleep(2000); // Wait till result is ready
#ifdef CHROMIUM_WORKAROUND
    }
#endif

    NPVariant* result_variant = (NPVariant*) IcedTeaPluginUtilities::stringToJSID(thread_data.result);
    std::string result_variant_jniid = std::string();
    createJavaObjectFromVariant(instance, *result_variant, &result_variant_jniid);

    IcedTeaPluginUtilities::constructMessagePrefix(0, reference, &response);
    response += " JavaScriptEval ";
    response += result_variant_jniid;

    plugin_to_java_bus->post(response.c_str());
}

/**
 * Calls the given javascript script
 *
 * @param message_parts The request message.
 */

void
00260 PluginRequestProcessor::call(std::vector<std::string*>* message_parts)
{
    NPP instance;
    std::string* window_ptr_str;
    NPVariant* window_ptr;
    int reference;
    std::string window_function_name;
    std::vector<NPVariant> args = std::vector<NPVariant>();
    std::vector<std::string> arg_ids = std::vector<std::string>();
    int arg_count;
    std::string response = std::string();
    JavaRequestProcessor java_request = JavaRequestProcessor();
    JavaResultData* java_result;

    reference = atoi(message_parts->at(3)->c_str());

    // window
    window_ptr_str = message_parts->at(5);
    window_ptr = (NPVariant*) IcedTeaPluginUtilities::stringToJSID(window_ptr_str);

    // instance
    instance = IcedTeaPluginUtilities::getInstanceFromMemberPtr(window_ptr);

    // function name
    java_result = java_request.getString(*(message_parts->at(6)));
    CHECK_JAVA_RESULT(java_result);
    window_function_name.append(*(java_result->return_string));

    // arguments
    for (int i=7; i < message_parts->size(); i++)
    {
        arg_ids.push_back(*(message_parts->at(i)));
    }

    // determine arguments
    for (int i=0; i < arg_ids.size(); i++)
    {
        NPVariant* variant = new NPVariant();
        java_result = java_request.getValue(arg_ids[i]);
        CHECK_JAVA_RESULT(java_result);

        IcedTeaPluginUtilities::javaResultToNPVariant(instance, java_result->return_string, variant);

        args.push_back(*variant);
    }

    arg_count = args.size();
    NPVariant *args_array = (NPVariant*) malloc(sizeof(NPVariant)*args.size());
    for (int i=0; i < args.size(); i++)
        args_array[i] = args[i];

    AsyncCallThreadData thread_data = AsyncCallThreadData();
    thread_data.result_ready = false;
    thread_data.parameters = std::vector<void*>();
    thread_data.result = std::string();

    thread_data.parameters.push_back(instance);
    thread_data.parameters.push_back(NPVARIANT_TO_OBJECT(*window_ptr));
    thread_data.parameters.push_back(&window_function_name);
    thread_data.parameters.push_back(&arg_count);
    thread_data.parameters.push_back(args_array);

#ifdef CHROMIUM_WORKAROUND
    // Workaround for chromium
    _call(&thread_data);

    if (!thread_data.call_successful)
    {
#endif
        thread_data.result_ready = false;
        browser_functions.pluginthreadasynccall(instance, &_call, &thread_data);

        while (!thread_data.result_ready) usleep(2000); // wait till ready
#ifdef CHROMIUM_WORKAROUND
    }
#endif

    NPVariant* result_variant = (NPVariant*) IcedTeaPluginUtilities::stringToJSID(thread_data.result);
    std::string result_variant_jniid = std::string();

    if (result_variant)
    {
        createJavaObjectFromVariant(instance, *result_variant, &result_variant_jniid);
    } else
    {
        result_variant_jniid = "0";
    }

    IcedTeaPluginUtilities::constructMessagePrefix(0, reference, &response);
    response += " JavaScriptCall ";
    response += result_variant_jniid;

    plugin_to_java_bus->post(response.c_str());

    cleanup:
    free(args_array);
}

/**
 * Sends the string value of the requested variable
 *
 * @param message_parts The request message.
 */
void
00364 PluginRequestProcessor::sendString(std::vector<std::string*>* message_parts)
{
    std::string variant_ptr;
    NPVariant* variant;
    JavaRequestProcessor java_request = JavaRequestProcessor();
    JavaResultData* java_result;
    int reference;
    std::string response = std::string();

    reference = atoi(message_parts->at(3)->c_str());
    variant_ptr = *(message_parts->at(5));

    variant = (NPVariant*) IcedTeaPluginUtilities::stringToJSID(variant_ptr);
    AsyncCallThreadData thread_data = AsyncCallThreadData();
    thread_data.result_ready = false;
    thread_data.parameters = std::vector<void*>();
    thread_data.result = std::string();

    NPP instance = IcedTeaPluginUtilities::getInstanceFromMemberPtr(variant);
    thread_data.parameters.push_back(instance);
    thread_data.parameters.push_back(variant);

#ifdef CHROMIUM_WORKAROUND
    // Workaround for chromium
    _getString(&thread_data);

    if (!thread_data.call_successful)
    {
#endif
        thread_data.result_ready = false;
        browser_functions.pluginthreadasynccall(instance, &_getString, &thread_data);
        while (!thread_data.result_ready) usleep(2000); // wait till ready
#ifdef CHROMIUM_WORKAROUND
    }
#endif

    // We need the context 0 for backwards compatibility with the Java side
    IcedTeaPluginUtilities::constructMessagePrefix(0, reference, &response);
    response += " JavaScriptToString ";
    response += thread_data.result;

    plugin_to_java_bus->post(response.c_str());

    cleanup:

    pthread_mutex_lock(&tc_mutex);
    thread_count--;
    pthread_mutex_unlock(&tc_mutex);
}

/**
 * Sets variable to given value
 *
 * @param message_parts The request message.
 */

void
00421 PluginRequestProcessor::setMember(std::vector<std::string*>* message_parts)
{
    std::string propertyNameID;
    std::string value = std::string();
    std::string response = std::string();
    int reference;

    NPP instance;
    NPVariant* member;
    NPIdentifier property_identifier;

    JavaRequestProcessor java_request = JavaRequestProcessor();
    JavaResultData* java_result;

    IcedTeaPluginUtilities::printStringPtrVector("PluginRequestProcessor::_setMember - ", message_parts);

    reference = atoi(message_parts->at(3)->c_str());

    member = (NPVariant*) (IcedTeaPluginUtilities::stringToJSID(*(message_parts->at(5))));
    propertyNameID = *(message_parts->at(6));

    if (*(message_parts->at(7)) == "literalreturn")
    {
        value.append(*(message_parts->at(7)));
        value.append(" ");
        value.append(*(message_parts->at(8)));
    } else
    {
        value.append(*(message_parts->at(7)));
    }

    instance = IcedTeaPluginUtilities::getInstanceFromMemberPtr(member);

    if (*(message_parts->at(4)) == "SetSlot")
    {
        property_identifier = browser_functions.getintidentifier(atoi(message_parts->at(6)->c_str()));
    } else
    {
        java_result = java_request.getString(propertyNameID);

        // the result we want is in result_string (assuming there was no error)
        if (java_result->error_occurred)
        {
            printf("Unable to get member name for setMember. Error occurred: %s\n", java_result->error_msg);
            //goto cleanup;
        }

        property_identifier = browser_functions.getstringidentifier(java_result->return_string->c_str());
    }

    AsyncCallThreadData thread_data = AsyncCallThreadData();
    thread_data.result_ready = false;
    thread_data.parameters = std::vector<void*>();
    thread_data.result = std::string();

    thread_data.parameters.push_back(instance);
    thread_data.parameters.push_back(NPVARIANT_TO_OBJECT(*member));
    thread_data.parameters.push_back(&property_identifier);
    thread_data.parameters.push_back(&value);

#ifdef CHROMIUM_WORKAROUND
    // Workaround for chromium
    _setMember(&thread_data);

    if (!thread_data.call_successful)
    {
#endif
        thread_data.result_ready = false;
        browser_functions.pluginthreadasynccall(instance, &_setMember, &thread_data);

        while (!thread_data.result_ready) usleep(2000); // wait till ready
#ifdef CHROMIUM_WORKAROUND
    }
#endif

    IcedTeaPluginUtilities::constructMessagePrefix(0, reference, &response);
    response.append(" JavaScriptSetMember ");
    plugin_to_java_bus->post(response.c_str());

    cleanup:

    // property_name, type and value are deleted by _setMember
    pthread_mutex_lock(&tc_mutex);
    thread_count--;
    pthread_mutex_unlock(&tc_mutex);
}

/**
 * Sends request member pointer to the Java side.
 *
 * This is a static function, called in another thread. Since certain data
 * can only be requested from the main thread in Mozilla, this function
 * does whatever it can seperately, and then makes an internal request that
 * causes _sendMember to do the rest of the work.
 *
 * @param message_parts The request message
 */

void
00520 PluginRequestProcessor::sendMember(std::vector<std::string*>* message_parts)
{
    // member initialization
    std::vector<std::string> args;
    JavaRequestProcessor java_request = JavaRequestProcessor();
    JavaResultData* java_result;
    NPVariant* parent_ptr;

    //int reference;
    std::string member_id = std::string();
    std::string jsObjectClassID = std::string();
    std::string jsObjectConstructorID = std::string();
    std::string response = std::string();

    NPIdentifier member_identifier;

    int method_id;
    int instance_id;
    int reference;

    // debug printout of parent thread data
    IcedTeaPluginUtilities::printStringPtrVector("PluginRequestProcessor::getMember:", message_parts);

    reference = atoi(message_parts->at(3)->c_str());

    // store info in local variables for easy access
    instance_id = atoi(message_parts->at(1)->c_str());
    parent_ptr = (NPVariant*) (IcedTeaPluginUtilities::stringToJSID(message_parts->at(5)));
    member_id.append(*(message_parts->at(6)));

    /** Request data from Java if necessary **/
    if (*(message_parts->at(4)) == "GetSlot")
    {
        member_identifier = browser_functions.getintidentifier(atoi(member_id.c_str()));
    } else
    {
        // make a new request for getString, to get the name of the identifier
        java_result = java_request.getString(member_id);

        // the result we want is in result_string (assuming there was no error)
        if (java_result->error_occurred)
        {
            printf("Unable to process getMember request. Error occurred: %s\n", java_result->error_msg);
            //goto cleanup;
        }

        member_identifier = browser_functions.getstringidentifier(java_result->return_string->c_str());
    }

    AsyncCallThreadData thread_data = AsyncCallThreadData();
    thread_data.result_ready = false;
    thread_data.parameters = std::vector<void*>();
    thread_data.result = std::string();

    NPP instance = IcedTeaPluginUtilities::getInstanceFromMemberPtr(parent_ptr);
    thread_data.parameters.push_back(instance);
    thread_data.parameters.push_back(NPVARIANT_TO_OBJECT(*parent_ptr));
    thread_data.parameters.push_back(&member_identifier);

#ifdef CHROMIUM_WORKAROUND
    // Workaround for chromium
    _getMember(&thread_data);

    if (!thread_data.call_successful)
    {
#endif
        thread_data.result_ready = false;
        browser_functions.pluginthreadasynccall(instance, &_getMember, &thread_data);

        while (!thread_data.result_ready) usleep(2000); // wait till ready

#ifdef CHROMIUM_WORKAROUND
    }
#endif

    PLUGIN_DEBUG("Member PTR after internal request: %s\n", thread_data.result.c_str());

    java_result = java_request.findClass(0, "netscape.javascript.JSObject");

    // the result we want is in result_string (assuming there was no error)
    if (java_result->error_occurred)
    {
        printf("Unable to process getMember request. Error occurred: %s\n", java_result->error_msg);
        //goto cleanup;
    }

    jsObjectClassID.append(*(java_result->return_string));

    args = std::vector<std::string>();
    std::string longArg = "J";
    args.push_back(longArg);

    java_result = java_request.getMethodID(jsObjectClassID,
                                           browser_functions.getstringidentifier("<init>"),
                                           args);

    // the result we want is in result_string (assuming there was no error)
    if (java_result->error_occurred)
    {
        printf("Unable to process getMember request. Error occurred: %s\n", java_result->error_msg);
        //goto cleanup;
    }

    jsObjectConstructorID.append(*(java_result->return_string));

    // We have the method id. Now create a new object.

    args.clear();
    args.push_back(thread_data.result);
    java_result = java_request.newObjectWithConstructor("",
                                         jsObjectClassID,
                                         jsObjectConstructorID,
                                         args);

    // the result we want is in result_string (assuming there was no error)
    if (java_result->error_occurred)
    {
        printf("Unable to process getMember request. Error occurred: %s\n", java_result->error_msg);
        //goto cleanup;
    }


    IcedTeaPluginUtilities::constructMessagePrefix(0, reference, &response);
    if (*(message_parts->at(2)) == "GetSlot")
    {
        response.append(" JavaScriptGetMember ");
    } else {
        response.append(" JavaScriptGetSlot ");
    }
    response.append(java_result->return_string->c_str());
    plugin_to_java_bus->post(response.c_str());


    // Now be a good citizen and help keep the heap free of garbage
    cleanup:

    pthread_mutex_lock(&tc_mutex);
    thread_count--;
    pthread_mutex_unlock(&tc_mutex);
}

/**
 * Decrements reference count to given object
 *
 * @param message_parts The request message.
 */

void
00668 PluginRequestProcessor::finalize(std::vector<std::string*>* message_parts)
{
    std::string* type;
    std::string* command;
    int reference;
    std::string response = std::string();
    std::string* variant_ptr_str;
    NPVariant* variant_ptr;
    NPObject* window_ptr;
    int id;

    type = message_parts->at(0);
    id = atoi(message_parts->at(1)->c_str());
    reference = atoi(message_parts->at(3)->c_str());
    variant_ptr_str = message_parts->at(5);

    NPP instance;
    get_instance_from_id(id, instance);

    variant_ptr = (NPVariant*) IcedTeaPluginUtilities::stringToJSID(variant_ptr_str);
    window_ptr = NPVARIANT_TO_OBJECT(*variant_ptr);
    browser_functions.releaseobject(window_ptr);

    // remove reference
    IcedTeaPluginUtilities::removeInstanceID(variant_ptr);

    // clear memory
    free(variant_ptr);

    // We need the context 0 for backwards compatibility with the Java side
    IcedTeaPluginUtilities::constructMessagePrefix(0, reference, &response);
    response += " JavaScriptFinalize";

    plugin_to_java_bus->post(response.c_str());
}


void*
queue_processor(void* data)
{

    PluginRequestProcessor* processor = (PluginRequestProcessor*) data;
    std::vector<std::string*>* message_parts = NULL;
    std::string command;
    pthread_mutex_t wait_mutex = PTHREAD_MUTEX_INITIALIZER; // This is needed for API compat. and is unused

    PLUGIN_DEBUG("Queue processor initialized. Queue = %p\n", message_queue);

    while (true)
    {
        pthread_mutex_lock(&message_queue_mutex);
        if (message_queue->size() > 0)
        {
            message_parts = message_queue->front();
            message_queue->erase(message_queue->begin());
        }
        pthread_mutex_unlock(&message_queue_mutex);

        if (message_parts)
        {
            command = *(message_parts->at(4));

            if (command == "GetMember")
            {
                processor->sendMember(message_parts);
            } else if (command == "ToString")
            {
                processor->sendString(message_parts);
            } else if (command == "SetMember")
            {
                  // write methods are synchronized
                  pthread_mutex_lock(&syn_write_mutex);
                processor->setMember(message_parts);
                pthread_mutex_unlock(&syn_write_mutex);
            } else if (command == "Call")
            {
                // write methods are synchronized
                pthread_mutex_lock(&syn_write_mutex);
                processor->call(message_parts);
                pthread_mutex_unlock(&syn_write_mutex);
            } else if (command == "Eval")
            {
                // write methods are synchronized
                pthread_mutex_lock(&syn_write_mutex);
                processor->eval(message_parts);
                pthread_mutex_unlock(&syn_write_mutex);
            } else if (command == "GetSlot")
            {
                // write methods are synchronized
                pthread_mutex_lock(&syn_write_mutex);
                processor->sendMember(message_parts);
                pthread_mutex_unlock(&syn_write_mutex);
            } else if (command == "SetSlot")
            {
                // write methods are synchronized
                pthread_mutex_lock(&syn_write_mutex);
                processor->setMember(message_parts);
                pthread_mutex_unlock(&syn_write_mutex);
            } else if (command == "Finalize")
            {
                // write methods are synchronized
                pthread_mutex_lock(&syn_write_mutex);
                processor->finalize(message_parts);
                pthread_mutex_unlock(&syn_write_mutex);
            } else
            {
                // Nothing matched
                IcedTeaPluginUtilities::printStringPtrVector("Error: Unable to process message: ", message_parts);
            }

            // Free memory for message_parts
            IcedTeaPluginUtilities::freeStringPtrVector(message_parts);

        } else
        {
            pthread_cond_wait(&cond_message_available, &wait_mutex);
            pthread_testcancel();
        }

        message_parts = NULL;
    }

    PLUGIN_DEBUG("Queue processing stopped.\n");
}

/******************************************
 * Functions delegated to the main thread *
 ******************************************/

void
_setMember(void* data)
{
    std::string* value;

    NPP instance;
    NPVariant value_variant = NPVariant();
    NPObject* member;
    NPIdentifier* property;

    std::vector<void*> parameters = ((AsyncCallThreadData*) data)->parameters;
    instance = (NPP) parameters.at(0);
    member = (NPObject*) parameters.at(1);
    property = (NPIdentifier*) parameters.at(2);
    value = (std::string*) parameters.at(3);

    PLUGIN_DEBUG("Setting %s on instance %p, object %p to value %s\n", browser_functions.utf8fromidentifier(*property), instance, member, value->c_str());

    IcedTeaPluginUtilities::javaResultToNPVariant(instance, value, &value_variant);

    ((AsyncCallThreadData*) data)->call_successful = browser_functions.setproperty(instance, member, *property, &value_variant);

    ((AsyncCallThreadData*) data)->result_ready = true;
}

void
_getMember(void* data)
{
    NPObject* parent_ptr;
    NPVariant* member_ptr = new NPVariant();
    std::string member_ptr_str = std::string();
    NPP instance;

    std::vector<void*> parameters = ((AsyncCallThreadData*) data)->parameters;

    instance = (NPP) parameters.at(0);
    parent_ptr = (NPObject*) parameters.at(1);
    NPIdentifier* member_identifier = (NPIdentifier*) parameters.at(2);

    // Get the NPVariant corresponding to this member
    PLUGIN_DEBUG("Looking for %p %p %p (%s)\n", instance, parent_ptr, member_identifier, browser_functions.utf8fromidentifier(*member_identifier));

    if (!browser_functions.hasproperty(instance, parent_ptr, *member_identifier))
    {
        printf("%s not found!\n", browser_functions.utf8fromidentifier(*member_identifier));
    }
    ((AsyncCallThreadData*) data)->call_successful = browser_functions.getproperty(instance, parent_ptr, *member_identifier, member_ptr);

    IcedTeaPluginUtilities::printNPVariant(*member_ptr);

    if (((AsyncCallThreadData*) data)->call_successful)
    {
        IcedTeaPluginUtilities::JSIDToString(member_ptr, &member_ptr_str);
        ((AsyncCallThreadData*) data)->result.append(member_ptr_str);
    }
    ((AsyncCallThreadData*) data)->result_ready = true;

    // store member -> instance link
    IcedTeaPluginUtilities::storeInstanceID(member_ptr, instance);

    PLUGIN_DEBUG("_getMember returning.\n");
}

void
_eval(void* data)
{
    NPP instance;
    NPObject* window_ptr;
    std::string* script_str;
    NPIdentifier script_identifier;
    NPString script = NPString();
    NPVariant* eval_result = new NPVariant();
    std::string eval_result_ptr_str = std::string();

    PLUGIN_DEBUG("_eval called\n");

    std::vector<void*>* call_data = (std::vector<void*>*) data;

    instance = (NPP) call_data->at(0);
    window_ptr = (NPObject*) call_data->at(1);
    script_str = (std::string*) call_data->at(2);

#if MOZILLA_VERSION_COLLAPSED < 1090200
    script.utf8characters = script_str->c_str();
    script.utf8length = script_str->size();

    PLUGIN_DEBUG("Evaluating: %s\n", script.utf8characters);
#else
    script.UTF8Characters = script_str->c_str();
    script.UTF8Length = script_str->size();

    PLUGIN_DEBUG("Evaluating: %s\n", script.UTF8Characters);
#endif

    ((AsyncCallThreadData*) data)->call_successful = browser_functions.evaluate(instance, window_ptr, &script, eval_result);
    IcedTeaPluginUtilities::printNPVariant(*eval_result);

    if (((AsyncCallThreadData*) data)->call_successful)
    {
        IcedTeaPluginUtilities::JSIDToString(eval_result, &eval_result_ptr_str);
        ((AsyncCallThreadData*) data)->result.append(eval_result_ptr_str);
    }
    ((AsyncCallThreadData*) data)->result_ready = true;

    PLUGIN_DEBUG("_eval returning\n");
}


void
_call(void* data)
{
    NPP instance;
    NPObject* window_ptr;
    std::string* function_name;
    NPIdentifier function;
    int* arg_count;
    NPVariant* args;
    NPVariant* call_result = new NPVariant();
    std::string call_result_ptr_str = std::string();

    PLUGIN_DEBUG("_call called\n");

    std::vector<void*>* call_data = (std::vector<void*>*) data;

    instance = (NPP) call_data->at(0);
    window_ptr = (NPObject*) call_data->at(1);
    function_name = (std::string*) call_data->at(2);

    function = browser_functions.getstringidentifier(function_name->c_str());
    arg_count = (int*) call_data->at(3);
    args = (NPVariant*) call_data->at(4);

    for (int i=0; i < *arg_count; i++) {
        IcedTeaPluginUtilities::printNPVariant(args[i]);
    }

    PLUGIN_DEBUG("_calling\n");
    ((AsyncCallThreadData*) data)->call_successful = browser_functions.invoke(instance, window_ptr, function, args, *arg_count, call_result);
    PLUGIN_DEBUG("_called\n");

    IcedTeaPluginUtilities::printNPVariant(*call_result);

    if (((AsyncCallThreadData*) data)->call_successful)
    {
        IcedTeaPluginUtilities::JSIDToString(call_result, &call_result_ptr_str);
        ((AsyncCallThreadData*) data)->result.append(call_result_ptr_str);
    }

    ((AsyncCallThreadData*) data)->result_ready = true;

    PLUGIN_DEBUG("_call returning\n");
}

void
_getString(void* data)
{
    NPP instance;
    NPObject* object;
    NPIdentifier toString = browser_functions.getstringidentifier("toString");
    NPVariant tostring_result;
    std::string result = std::string();

    std::vector<void*>* call_data = (std::vector<void*>*) data;
    instance = (NPP) call_data->at(0);
    NPVariant* variant = (NPVariant*) call_data->at(1);

    PLUGIN_DEBUG("_getString called with %p and %p\n", instance, variant);

    if (NPVARIANT_IS_OBJECT(*variant))
    {
        ((AsyncCallThreadData*) data)->call_successful = browser_functions.invoke(instance, NPVARIANT_TO_OBJECT(*variant), toString, NULL, 0, &tostring_result);
    }
    else
    {
        IcedTeaPluginUtilities::NPVariantToString(*variant, &result);
        tostring_result = NPVariant();
        STRINGZ_TO_NPVARIANT(result.c_str(), tostring_result);
        ((AsyncCallThreadData*) data)->call_successful = true;
    }

    PLUGIN_DEBUG("ToString result: ");
    IcedTeaPluginUtilities::printNPVariant(tostring_result);

    if (((AsyncCallThreadData*) data)->call_successful)
    {
        createJavaObjectFromVariant(instance, tostring_result, &(((AsyncCallThreadData*) data)->result));
    }
    ((AsyncCallThreadData*) data)->result_ready = true;

    PLUGIN_DEBUG("_getString returning\n");
}


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