/*
 * Copyright (C) 2006, 2007 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 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"

#ifdef ANDROID_PLUGINS
// Needed for NPN_PluginThreadAsyncCall, which calls
// JavaSharedClient::EnqueueFunctionPtr().
#include "JavaSharedClient.h" 
#endif
#include "WebCoreJni.h"
#include "PluginInfoStore.h"
#include "PluginViewAndroid.h"
#include "jni.h"
#include "npapi.h"

#include "PluginDebug.h"

using namespace WebCore;

// The plugin view is always the ndata of the instance,. Sometimes, plug-ins will call an instance-specific function
// with a NULL instance. To workaround this, call the last plug-in view that made a call to a plug-in.
// Currently, the current plug-in view is only set before NPP_New in PluginViewAndroid::start.
// This specifically works around Flash and Shockwave. When we call NPP_New, they call NPN_Useragent with a NULL instance.
static PluginViewAndroid* pluginViewForInstance(NPP instance)
{
    if (instance && instance->ndata)
        return static_cast<PluginViewAndroid*>(instance->ndata);
    return PluginViewAndroid::currentPluginView();
}

void* NPN_MemAlloc(uint32 size)
{
    return malloc(size);
}

void NPN_MemFree(void* ptr)
{
    free(ptr);
}

uint32 NPN_MemFlush(uint32 size)
{
    // Do nothing
    return 0;
}

void NPN_ReloadPlugins(NPBool reloadPages)
{
    refreshPlugins(reloadPages);
}

NPError NPN_RequestRead(NPStream* stream, NPByteRange* rangeList)
{
    return NPERR_STREAM_NOT_SEEKABLE;
}

NPError NPN_GetURLNotify(NPP instance, const char* url, const char* target, void* notifyData)
{
    return pluginViewForInstance(instance)->getURLNotify(url, target, notifyData);
}

NPError NPN_GetURL(NPP instance, const char* url, const char* target)
{
    return pluginViewForInstance(instance)->getURL(url, target);
}

NPError NPN_PostURLNotify(NPP instance, const char* url, const char* target, uint32 len, const char* buf, NPBool file, void* notifyData)
{
    return pluginViewForInstance(instance)->postURLNotify(url, target, len, buf, file, notifyData);
}

NPError NPN_PostURL(NPP instance, const char* url, const char* target, uint32 len, const char* buf, NPBool file)
{
    return pluginViewForInstance(instance)->postURL(url, target, len, buf, file);
}

NPError NPN_NewStream(NPP instance, NPMIMEType type, const char* target, NPStream** stream)
{
    return pluginViewForInstance(instance)->newStream(type, target, stream);
}

int32 NPN_Write(NPP instance, NPStream* stream, int32 len, void* buffer)
{
    return pluginViewForInstance(instance)->write(stream, len, buffer);
}

NPError NPN_DestroyStream(NPP instance, NPStream* stream, NPReason reason)
{
    return pluginViewForInstance(instance)->destroyStream(stream, reason);
}

const char* NPN_UserAgent(NPP instance)
{
    PluginViewAndroid* view = pluginViewForInstance(instance);

     // FIXME: Some plug-ins call NPN_UserAgent with a null instance in their NP_initialize function!
     // We'd need a way to get a user agent without having a frame around.
     if (!view)
         return 0;
 
    return view->userAgent();
}

void NPN_Status(NPP instance, const char* message)
{
    pluginViewForInstance(instance)->status(message);
}

void NPN_InvalidateRect(NPP instance, NPRect* invalidRect)
{
    pluginViewForInstance(instance)->invalidateRect(invalidRect);
}

void NPN_InvalidateRegion(NPP instance, NPRegion invalidRegion)
{
    pluginViewForInstance(instance)->invalidateRegion(invalidRegion);
}

void NPN_ForceRedraw(NPP instance)
{
    pluginViewForInstance(instance)->forceRedraw();
}

NPError NPN_GetValue(NPP instance, NPNVariable variable, void* value)
{
    return pluginViewForInstance(instance)->getValue(variable, value);
}

NPError NPN_SetValue(NPP instance, NPPVariable variable, void* value)
{
   return pluginViewForInstance(instance)->setValue(variable, value);
}

void* NPN_GetJavaEnv()
{
    // This is supposed to return the JRIEnv, but nobody's been using
    // that interface for years. Far more useful to return the JNIEnv,
    // so we'll do that...
    JNIEnv* env = NULL;
    if (android::WebCoreJni::getJavaVM()->GetEnv((void**) &env,
                                                 JNI_VERSION_1_4) != JNI_OK) {
        PLUGIN_LOG("GetEnv failed!");
    }
    return env;
}

void* NPN_GetJavaPeer(NPP instance)
{
    // Unsupported
    return 0;
}

void
NPN_PushPopupsEnabledState(NPP instance, NPBool enabled)
{
}

void
NPN_PopPopupsEnabledState(NPP instance)
{
}

#ifdef ANDROID_PLUGINS
// Added in version 19 NPAPI. Sandbox WebKit has this same function in
// plugins/npapi.cpp rather than plugins/android/npapi.cpp. This file
// goes away after merge.
void NPN_PluginThreadAsyncCall(NPP instance,
                               void (*func)(void *),
                               void *userData)
{
    // This is used to marshal a function call onto the main thread,
    // so plugins can get around not "owning" the message loop. Note
    // that the plugin is responsible for taking care of the potential
    // race between the order of NPP_Destroy and callbacks.
    JavaSharedClient::EnqueueFunctionPtr(func, userData);
}
#endif