/*
    pygame - Python Game Library
    Copyright (C) 2006, 2007 Rene Dudfield, Marcus von Appen

    Originally written and put in the public domain by Sam Lantinga.

    This library is free software; you can redistribute it and/or
    modify it under the terms of the GNU Library General Public
    License as published by the Free Software Foundation; either
    version 2 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
    Library General Public License for more details.

    You should have received a copy of the GNU Library General Public
    License along with this library; if not, write to the Free
    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
*/

/* Handle clipboard text and data in arbitrary formats */

#include <stdio.h>
#include <limits.h>

#include "SDL.h"
#include "SDL_syswm.h"

#include "scrap.h"
#include "pygame.h"
#include "doc/scrap_doc.h"
#include "pgcompat.h"

/**
 * Indicates, whether pygame.scrap was initialized or not.
 */
static int _scrapinitialized = 0;

/**
 * Currently active Clipboard object.
 */
static ScrapClipType _currentmode;
static PyObject* _selectiondata;
static PyObject* _clipdata;

/* Forward declarations. */
static PyObject* _scrap_get_types (PyObject *self, PyObject *args);
static PyObject* _scrap_contains (PyObject *self, PyObject *args);
static PyObject* _scrap_get_scrap (PyObject* self, PyObject* args);
static PyObject* _scrap_put_scrap (PyObject* self, PyObject* args);
static PyObject* _scrap_lost_scrap (PyObject* self, PyObject* args);
static PyObject* _scrap_set_mode (PyObject* self, PyObject* args);

/* Determine what type of clipboard we are using */
#if defined(__unix__) && defined(SDL_VIDEO_DRIVER_X11)
/*!defined(__QNXNTO__) &&*/
    #define X11_SCRAP
    #include <time.h> /* Needed for clipboard timeouts. */
    #include "scrap_x11.c"
#elif defined(__WIN32__)
    #define WIN_SCRAP
    #include "scrap_win.c"
/*
#elif defined(__QNXNTO__)
    #define QNX_SCRAP
static uint32_t _cliptype = 0;
    #include "scrap_qnx.c"
*/
#elif defined(__APPLE__)
    #define MAC_SCRAP
    #include "scrap_mac.c"
#else
    #error Unknown window manager for clipboard handling
#endif /* scrap type */

/**
 * \brief Indicates whether the scrap module is already initialized.
 *
 * \return 0 if the module is not initialized, 1, if it is.
 */
int
pygame_scrap_initialized (void)
{
    return _scrapinitialized;
}

#if !defined(MAC_SCRAP)
/*
 * Initializes the pygame scrap module.
 */
static PyObject*
_scrap_init (PyObject *self, PyObject *args)
{
    VIDEO_INIT_CHECK ();
    _clipdata = PyDict_New ();
    _selectiondata = PyDict_New ();

    /* In case we've got not video surface, we won't initialize
     * anything.
     */
    if (!SDL_GetVideoSurface())
        return RAISE (PyExc_SDLError, "No display mode is set");
    if (!pygame_scrap_init ())
        return RAISE (PyExc_SDLError, SDL_GetError ());
    
    Py_RETURN_NONE;
}
#endif


#if !defined(MAC_SCRAP)
/*
 * Gets the currently available types from the active clipboard.
 */
static PyObject*
_scrap_get_types (PyObject *self, PyObject *args)
{
    int i = 0;
    char **types;
    char *type;
    PyObject *list;
    PyObject *tmp;
    
    PYGAME_SCRAP_INIT_CHECK ();
    if (!pygame_scrap_lost ())
    {
        switch (_currentmode)
        {
        case SCRAP_SELECTION:
            return PyDict_Keys (_selectiondata);
        case SCRAP_CLIPBOARD:
        default:
            return PyDict_Keys (_clipdata);
        }
    }

    list = PyList_New (0);
    types = pygame_scrap_get_types ();
    if (!types)
        return list;
    while (types[i] != NULL)
    {
        type = types[i];
        tmp = PyUnicode_DecodeASCII (type, strlen (type), 0);
        if (!tmp) {
            Py_DECREF (list);
            return 0;
        }
        if (PyList_Append (list, tmp)) {
            Py_DECREF (list);
            Py_DECREF (tmp);
            return 0;
        }
        Py_DECREF (tmp);
        i++;
    }
    return list;
}
#endif


#if !defined(MAC_SCRAP)
/*
 * Checks whether the active clipboard contains a certain type.
 */
static PyObject*
_scrap_contains (PyObject *self, PyObject *args)
{
    char *type = NULL;

    if (!PyArg_ParseTuple (args, "s", &type))
        return NULL;
    if (pygame_scrap_contains (type))
        Py_RETURN_TRUE;
    Py_RETURN_FALSE;
}
#endif


#if !defined(MAC_SCRAP)
/*
 * Gets the content for a certain type from the active clipboard.
 */
static PyObject*
_scrap_get_scrap (PyObject* self, PyObject* args)
{
    char *scrap = NULL;
    PyObject *retval;
    char *scrap_type;
    PyObject *val;
    unsigned long count;

    PYGAME_SCRAP_INIT_CHECK ();

    if(!PyArg_ParseTuple (args, "s", &scrap_type))
        return NULL;

    if (!pygame_scrap_lost ())
    {
        /* We are still the active one. */
        switch (_currentmode)
        {
        case SCRAP_SELECTION:
            val = PyDict_GetItemString (_selectiondata, scrap_type);
            break;
        case SCRAP_CLIPBOARD:
        default:
            val = PyDict_GetItemString (_clipdata, scrap_type);
            break;
        }
        Py_XINCREF (val);
        return val;
    }

    /* pygame_get_scrap() only returns NULL or !NULL, but won't set any
     * errors. */
    scrap = pygame_scrap_get (scrap_type, &count);
    if (!scrap)
        Py_RETURN_NONE;

    retval = Bytes_FromStringAndSize (scrap, count);
    return retval;
}
#endif

#if !defined(MAC_SCRAP)
/*
 * This will put a python string into the clipboard.
 */
static PyObject*
_scrap_put_scrap (PyObject* self, PyObject* args)
{
    int scraplen;
    char *scrap = NULL;
    char *scrap_type;
    PyObject *tmp;
#if PY3
    static const char argfmt[] = "sy#";
#else
    static char argfmt[] = "st#";
#endif

    PYGAME_SCRAP_INIT_CHECK ();

    if (!PyArg_ParseTuple (args, argfmt, &scrap_type, &scrap, &scraplen)) {
        return NULL;
    }

    /* Set it in the clipboard. */
    if (!pygame_scrap_put (scrap_type, scraplen, scrap))
        return RAISE (PyExc_SDLError,
                      "content could not be placed in clipboard.");

    /* Add or replace the set value. */
    switch (_currentmode)
    {
    case SCRAP_SELECTION:
    {
        tmp = Bytes_FromStringAndSize (scrap, scraplen);
        PyDict_SetItemString (_selectiondata, scrap_type, tmp);
        Py_DECREF (tmp);
        break;
    }
    case SCRAP_CLIPBOARD:
    default:
    {
        tmp = Bytes_FromStringAndSize (scrap, scraplen);
        PyDict_SetItemString (_clipdata, scrap_type, tmp);
        Py_DECREF (tmp);
        break;
    }
    }

    Py_RETURN_NONE;
}
#endif


#if !defined(MAC_SCRAP)
/*
 * Checks whether the pygame window has lost the clipboard.
 */
static PyObject*
_scrap_lost_scrap (PyObject* self, PyObject* args)
{
    PYGAME_SCRAP_INIT_CHECK ();

    if (pygame_scrap_lost ())
        Py_RETURN_TRUE;
    Py_RETURN_FALSE;
}
#endif


#if !defined(MAC_SCRAP)
/*
 * Sets the clipboard mode. This only works for the X11 environment, which
 * diverses between mouse selections and the clipboard.
 */
static PyObject*
_scrap_set_mode (PyObject* self, PyObject* args)
{
    PYGAME_SCRAP_INIT_CHECK ();
    if (!PyArg_ParseTuple (args, "i", &_currentmode))
        return NULL;

    if (_currentmode != SCRAP_CLIPBOARD && _currentmode != SCRAP_SELECTION)
        return RAISE (PyExc_ValueError, "invalid clipboard mode");

#ifndef X11_SCRAP
    /* Force the clipboard, if not in a X11 environment. */
    _currentmode = SCRAP_CLIPBOARD;
#endif
    Py_RETURN_NONE;
}

#endif /* !defined(MAC_SCRAP) */

static PyMethodDef scrap_builtins[] =
{
    /*
     * Only initialise these functions for ones we know about.
     *
     * Note, the macosx stuff is done in sdlosx_main.m 
     */
#if (defined(X11_SCRAP) || defined(WIN_SCRAP) || defined(QNX_SCRAP) \
     || defined(MAC_SCRAP))

    { "init", _scrap_init, 1, DOC_PYGAMESCRAPINIT },
    { "contains", _scrap_contains, METH_VARARGS, DOC_PYGAMESCRAPCONTAINS },
    { "get", _scrap_get_scrap, METH_VARARGS, DOC_PYGAMESCRAPGET },
    { "get_types", _scrap_get_types, METH_NOARGS, DOC_PYGAMESCRAPGETTYPES},
    { "put", _scrap_put_scrap, METH_VARARGS, DOC_PYGAMESCRAPPUT },
    { "lost", _scrap_lost_scrap, METH_NOARGS, DOC_PYGAMESCRAPLOST },
    { "set_mode", _scrap_set_mode, METH_VARARGS, DOC_PYGAMESCRAPSETMODE },

#endif
    { NULL, NULL, 0, NULL}
};

MODINIT_DEFINE (scrap)
{
    PyObject *module;

#if PY3
    static struct PyModuleDef _module = {
        PyModuleDef_HEAD_INIT,
        "scrap",
        "",
        -1,
        scrap_builtins,
        NULL, NULL, NULL, NULL
    };
#endif

    /* imported needed apis; Do this first so if there is an error
       the module is not loaded.
    */
    import_pygame_base ();
    if (PyErr_Occurred ()) {
        MODINIT_ERROR;
    }

    /* create the module */
#if PY3
    module = PyModule_Create (&_module);
#else
    module = Py_InitModule3 (MODPREFIX "scrap", scrap_builtins, NULL);
#endif

    MODINIT_RETURN (module);
}