/*
 * Copyright 2010 Jacek Caban for CodeWeavers
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library 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
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
 */

#include "mshtml_private.h"

/* Parts of npapi.h */

#define NP_VERSION_MAJOR 0
#define NP_VERSION_MINOR 25

typedef unsigned char NPBool;
typedef INT16 NPError;
typedef INT16 NPReason;
typedef char *NPMIMEType;

typedef struct _NPP {
    void *pdata;
    void *ndata;
} NPP_t, *NPP;

typedef struct _NPStream {
    void *pdata;
    void *ndata;
    const char *url;
    UINT32 end;
    UINT32 lastmodified;
    void *notifyData;
    const char *headers;
} NPStream;

typedef struct _NPSavedData {
    INT32 len;
    void *buf;
} NPSavedData;

typedef struct _NPRect {
    UINT16 top;
    UINT16 left;
    UINT16 bottom;
    UINT16 right;
} NPRect;

typedef enum {
    NPFocusNext = 0,
    NPFocusPrevious = 1
} NPFocusDirection;

#define NP_ABI_MASK 0

typedef enum {
    NPPVpluginNameString = 1,
    NPPVpluginDescriptionString,
    NPPVpluginWindowBool,
    NPPVpluginTransparentBool,
    NPPVjavaClass,
    NPPVpluginWindowSize,
    NPPVpluginTimerInterval,
    NPPVpluginScriptableInstance = (10 | NP_ABI_MASK),
    NPPVpluginScriptableIID = 11,
    NPPVjavascriptPushCallerBool = 12,
    NPPVpluginKeepLibraryInMemory = 13,
    NPPVpluginNeedsXEmbed = 14,
    NPPVpluginScriptableNPObject = 15,
    NPPVformValue = 16,
    NPPVpluginUrlRequestsDisplayedBool = 17,
    NPPVpluginWantsAllNetworkStreams = 18,
    NPPVpluginNativeAccessibleAtkPlugId = 19,
    NPPVpluginCancelSrcStream = 20,
    NPPVSupportsAdvancedKeyHandling = 21
} NPPVariable;

typedef enum {
    NPNVxDisplay = 1,
    NPNVxtAppContext,
    NPNVnetscapeWindow,
    NPNVjavascriptEnabledBool,
    NPNVasdEnabledBool,
    NPNVisOfflineBool,
    NPNVserviceManager = (10 | NP_ABI_MASK),
    NPNVDOMElement     = (11 | NP_ABI_MASK),
    NPNVDOMWindow      = (12 | NP_ABI_MASK),
    NPNVToolkit        = (13 | NP_ABI_MASK),
    NPNVSupportsXEmbedBool = 14,
    NPNVWindowNPObject = 15,
    NPNVPluginElementNPObject = 16,
    NPNVSupportsWindowless = 17,
    NPNVprivateModeBool = 18,
    NPNVsupportsAdvancedKeyHandling = 21
} NPNVariable;

typedef enum {
    NPWindowTypeWindow = 1,
    NPWindowTypeDrawable
} NPWindowType;

typedef struct _NPWindow {
    void *window;
    INT32 x;
    INT32 y;
    UINT32 width;
    UINT32 height;
    NPRect clipRect;
    NPWindowType type;
} NPWindow;

typedef struct _NPFullPrint {
    NPBool pluginPrinted;
    NPBool printOne;
    void *platformPrint;
} NPFullPrint;

typedef struct _NPEmbedPrint {
    NPWindow window;
    void *platformPrint;
} NPEmbedPrint;

typedef struct _NPPrint {
    UINT16 mode;
    union {
        NPFullPrint fullPrint;
        NPEmbedPrint embedPrint;
    } print;
} NPPrint;

typedef HRGN NPRegion;

#define NPERR_BASE                         0
#define NPERR_NO_ERROR                    (NPERR_BASE + 0)
#define NPERR_GENERIC_ERROR               (NPERR_BASE + 1)
#define NPERR_INVALID_INSTANCE_ERROR      (NPERR_BASE + 2)
#define NPERR_INVALID_FUNCTABLE_ERROR     (NPERR_BASE + 3)
#define NPERR_MODULE_LOAD_FAILED_ERROR    (NPERR_BASE + 4)
#define NPERR_OUT_OF_MEMORY_ERROR         (NPERR_BASE + 5)
#define NPERR_INVALID_PLUGIN_ERROR        (NPERR_BASE + 6)
#define NPERR_INVALID_PLUGIN_DIR_ERROR    (NPERR_BASE + 7)
#define NPERR_INCOMPATIBLE_VERSION_ERROR  (NPERR_BASE + 8)
#define NPERR_INVALID_PARAM               (NPERR_BASE + 9)
#define NPERR_INVALID_URL                 (NPERR_BASE + 10)
#define NPERR_FILE_NOT_FOUND              (NPERR_BASE + 11)
#define NPERR_NO_DATA                     (NPERR_BASE + 12)
#define NPERR_STREAM_NOT_SEEKABLE         (NPERR_BASE + 13)

/* Parts of npfunctions.h */

typedef NPError (CDECL *NPP_NewProcPtr)(NPMIMEType,NPP,UINT16,INT16,char**,char**,NPSavedData*);
typedef NPError (CDECL *NPP_DestroyProcPtr)(NPP,NPSavedData**);
typedef NPError (CDECL *NPP_SetWindowProcPtr)(NPP,NPWindow*);
typedef NPError (CDECL *NPP_NewStreamProcPtr)(NPP,NPMIMEType,NPStream*,NPBool,UINT16*);
typedef NPError (CDECL *NPP_DestroyStreamProcPtr)(NPP,NPStream*,NPReason);
typedef INT32 (CDECL *NPP_WriteReadyProcPtr)(NPP,NPStream*);
typedef INT32 (CDECL *NPP_WriteProcPtr)(NPP,NPStream*,INT32,INT32,void*);
typedef void (CDECL *NPP_StreamAsFileProcPtr)(NPP,NPStream*,const char*);
typedef void (CDECL *NPP_PrintProcPtr)(NPP,NPPrint*);
typedef INT16 (CDECL *NPP_HandleEventProcPtr)(NPP,void*);
typedef void (CDECL *NPP_URLNotifyProcPtr)(NPP,const char*,NPReason,void*);
typedef NPError (CDECL *NPP_GetValueProcPtr)(NPP,NPPVariable,void*);
typedef NPError (CDECL *NPP_SetValueProcPtr)(NPP,NPNVariable,void*);
typedef NPBool (CDECL *NPP_GotFocusPtr)(NPP,NPFocusDirection);
typedef void (CDECL *NPP_LostFocusPtr)(NPP);

typedef struct _NPPluginFuncs {
    UINT16 size;
    UINT16 version;
    NPP_NewProcPtr newp;
    NPP_DestroyProcPtr destroy;
    NPP_SetWindowProcPtr setwindow;
    NPP_NewStreamProcPtr newstream;
    NPP_DestroyStreamProcPtr destroystream;
    NPP_StreamAsFileProcPtr asfile;
    NPP_WriteReadyProcPtr writeready;
    NPP_WriteProcPtr write;
    NPP_PrintProcPtr print;
    NPP_HandleEventProcPtr event;
    NPP_URLNotifyProcPtr urlnotify;
    void *javaClass;
    NPP_GetValueProcPtr getvalue;
    NPP_SetValueProcPtr setvalue;
    NPP_GotFocusPtr gotfocus;
    NPP_LostFocusPtr lostfocus;
} NPPluginFuncs;

static nsIDOMHTMLElement *get_dom_element(NPP instance)
{
    nsISupports *instance_unk = (nsISupports*)instance->ndata;
    nsIPluginInstance *plugin_instance;
    nsIDOMHTMLElement *html_elem;
    nsIDOMElement *elem;
    nsresult nsres;

    nsres = nsISupports_QueryInterface(instance_unk, &IID_nsIPluginInstance, (void**)&plugin_instance);
    if(NS_FAILED(nsres)) {
        ERR("Could not get nsIPluginInstance interface: %08x\n", nsres);
        return NULL;
    }

    nsres = nsIPluginInstance_GetDOMElement(plugin_instance, &elem);
    nsIPluginInstance_Release(plugin_instance);
    if(NS_FAILED(nsres)) {
        ERR("GetDOMElement failed: %08x\n", nsres);
        return NULL;
    }

    nsres = nsIDOMElement_QueryInterface(elem, &IID_nsIDOMHTMLElement, (void**)&html_elem);
    nsIDOMElement_Release(elem);
    if(NS_FAILED(nsres)) {
        ERR("Could not get nsIDOMHTMLElement iface: %08x\n", nsres);
        return NULL;
    }

    return html_elem;
}

static HTMLInnerWindow *get_elem_window(nsIDOMHTMLElement *elem)
{
    nsIDOMWindow *nswindow;
    nsIDOMDocument *nsdoc;
    HTMLOuterWindow *window;
    nsresult nsres;

    nsres = nsIDOMHTMLElement_GetOwnerDocument(elem, &nsdoc);
    if(NS_FAILED(nsres))
        return NULL;

    nsres = nsIDOMDocument_GetDefaultView(nsdoc, &nswindow);
    nsIDOMDocument_Release(nsdoc);
    if(NS_FAILED(nsres) || !nswindow)
        return NULL;

    window = nswindow_to_window(nswindow);
    nsIDOMWindow_Release(nswindow);

    return window->base.inner_window;
}

static NPError CDECL NPP_New(NPMIMEType pluginType, NPP instance, UINT16 mode, INT16 argc, char **argn,
        char **argv, NPSavedData *saved)
{
    HTMLPluginContainer *container;
    nsIDOMHTMLElement *nselem;
    HTMLInnerWindow *window;
    HTMLDOMNode *node;
    NPError err = NPERR_NO_ERROR;
    HRESULT hres;

    TRACE("(%s %p %x %d %p %p %p)\n", debugstr_a(pluginType), instance, mode, argc, argn, argv, saved);

    nselem = get_dom_element(instance);
    if(!nselem) {
        ERR("Could not get DOM element\n");
        return NPERR_GENERIC_ERROR;
    }

    window = get_elem_window(nselem);
    if(!window) {
        ERR("Could not get element's window object\n");
        nsIDOMHTMLElement_Release(nselem);
        return NPERR_GENERIC_ERROR;
    }

    hres = get_node(window->doc, (nsIDOMNode*)nselem, TRUE, &node);
    nsIDOMHTMLElement_Release(nselem);
    if(FAILED(hres))
        return NPERR_GENERIC_ERROR;

    hres = IHTMLDOMNode_QueryInterface(&node->IHTMLDOMNode_iface, &IID_HTMLPluginContainer,
            (void**)&container);
    node_release(node);
    if(FAILED(hres)) {
        ERR("Not an object element\n");
        return NPERR_GENERIC_ERROR;
    }

    if(!container->plugin_host) {
        hres = create_plugin_host(window->doc, container);
        if(FAILED(hres))
            err = NPERR_GENERIC_ERROR;
    }else {
        TRACE("plugin host already associated.\n");
    }

    instance->pdata = container->plugin_host;

    node_release(&container->element.node);
    return err;
}

static NPError CDECL NPP_Destroy(NPP instance, NPSavedData **save)
{
    PluginHost *host = instance->pdata;

    TRACE("(%p %p)\n", instance, save);

    if(!host)
        return NPERR_GENERIC_ERROR;

    detach_plugin_host(host);
    IOleClientSite_Release(&host->IOleClientSite_iface);
    instance->pdata = NULL;
    return NPERR_NO_ERROR;
}

static NPError CDECL NPP_SetWindow(NPP instance, NPWindow *window)
{
    PluginHost *host = instance->pdata;
    RECT pos_rect = {0, 0, window->width, window->height};

    TRACE("(%p %p)\n", instance, window);

    if(!host)
        return NPERR_GENERIC_ERROR;

    update_plugin_window(host, window->window, &pos_rect);
    return NPERR_NO_ERROR;
}

static NPError CDECL NPP_NewStream(NPP instance, NPMIMEType type, NPStream *stream, NPBool seekable, UINT16 *stype)
{
    TRACE("\n");
    return NPERR_GENERIC_ERROR;
}

static NPError CDECL NPP_DestroyStream(NPP instance, NPStream *stream, NPReason reason)
{
    TRACE("\n");
    return NPERR_GENERIC_ERROR;
}

static INT32 CDECL NPP_WriteReady(NPP instance, NPStream *stream)
{
    TRACE("\n");
    return NPERR_GENERIC_ERROR;
}

static INT32 CDECL NPP_Write(NPP instance, NPStream *stream, INT32 offset, INT32 len, void *buffer)
{
    TRACE("\n");
    return NPERR_GENERIC_ERROR;
}

static void CDECL NPP_StreamAsFile(NPP instance, NPStream *stream, const char *fname)
{
    TRACE("\n");
}

static void CDECL NPP_Print(NPP instance, NPPrint *platformPrint)
{
    FIXME("\n");
}

static INT16 CDECL NPP_HandleEvent(NPP instance, void *event)
{
    TRACE("\n");
    return NPERR_GENERIC_ERROR;
}

static void CDECL NPP_URLNotify(NPP instance, const char *url, NPReason reason, void *notifyData)
{
    TRACE("\n");
}

static NPError CDECL NPP_GetValue(NPP instance, NPPVariable variable, void *ret_value)
{
    TRACE("\n");
    return NPERR_GENERIC_ERROR;
}

static NPError CDECL NPP_SetValue(NPP instance, NPNVariable variable, void *value)
{
    TRACE("\n");
    return NPERR_GENERIC_ERROR;
}

static NPBool CDECL NPP_GotFocus(NPP instance, NPFocusDirection direction)
{
    FIXME("\n");
    return NPERR_GENERIC_ERROR;
}

static void CDECL NPP_LostFocus(NPP instance)
{
    FIXME("\n");
}

/***********************************************************************
 *          NP_GetEntryPoints (mshtml.@)
 */
NPError WINAPI NP_GetEntryPoints(NPPluginFuncs* funcs)
{
    TRACE("(%p)\n", funcs);

    funcs->version = (NP_VERSION_MAJOR << 8) | NP_VERSION_MINOR;
    funcs->newp = NPP_New;
    funcs->destroy = NPP_Destroy;
    funcs->setwindow = NPP_SetWindow;
    funcs->newstream = NPP_NewStream;
    funcs->destroystream = NPP_DestroyStream;
    funcs->asfile = NPP_StreamAsFile;
    funcs->writeready = NPP_WriteReady;
    funcs->write = NPP_Write;
    funcs->print = NPP_Print;
    funcs->event = NPP_HandleEvent;
    funcs->urlnotify = NPP_URLNotify;
    funcs->javaClass = NULL;
    funcs->getvalue = NPP_GetValue;
    funcs->setvalue = NPP_SetValue;
    funcs->gotfocus = NPP_GotFocus;
    funcs->lostfocus = NPP_LostFocus;

    return NPERR_NO_ERROR;
}
