/* LIBGIMP - The GIMP Library                                                   
 * Copyright (C) 1995-1997 Peter Mattis and Spencer Kimball                
 *
 * 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 Software Foundation, Inc., 59 Temple Place - Suite 330,
 * Boston, MA 02111-1307, USA.
 */                                                                             
#include <stdio.h>
#include <string.h>

#include "gimp.h"
#include "gimpui.h"


static char* gimp_base_name     (char *str);
static void  gimp_menu_callback (GtkWidget *w,
				 gint32    *id);


GtkWidget*
gimp_image_menu_new (GimpConstraintFunc constraint,
		     GimpMenuCallback   callback,
		     gpointer           data,
		     gint32             active_image)
{
  GtkWidget *menu;
  GtkWidget *menuitem;
  char *filename;
  char *label;
  gint32 *images;
  int nimages;
  int i, k;

  menu = gtk_menu_new ();
  gtk_object_set_user_data (GTK_OBJECT (menu), (gpointer) callback);
  gtk_object_set_data (GTK_OBJECT (menu), "gimp_callback_data", data);

  images = gimp_query_images (&nimages);
  for (i = 0, k = 0; i < nimages; i++)
    if (!constraint || (* constraint) (images[i], -1, data))
      {
	filename = gimp_image_get_filename (images[i]);
	label = g_new (char, strlen (filename) + 16);
	sprintf (label, "%s-%d", gimp_base_name (filename), images[i]);
	g_free (filename);

	menuitem = gtk_menu_item_new_with_label (label);
	gtk_signal_connect (GTK_OBJECT (menuitem), "activate",
			    (GtkSignalFunc) gimp_menu_callback,
			    &images[i]);
	gtk_menu_append (GTK_MENU (menu), menuitem);
	gtk_widget_show (menuitem);

	g_free (label);

	if (images[i] == active_image)
	  gtk_menu_set_active (GTK_MENU (menu), k);

	k += 1;
      }

  if (k == 0)
    {
      menuitem = gtk_menu_item_new_with_label ("none");
      gtk_widget_set_sensitive (menuitem, FALSE);
      gtk_menu_append (GTK_MENU (menu), menuitem);
      gtk_widget_show (menuitem);
    }

  if (images)
    {
      if (active_image == -1)
	active_image = images[0];
      (* callback) (active_image, data);
    }

  return menu;
}

GtkWidget*
gimp_layer_menu_new (GimpConstraintFunc constraint,
		     GimpMenuCallback   callback,
		     gpointer           data,
		     gint32             active_layer)
{
  GtkWidget *menu;
  GtkWidget *menuitem;
  char *name;
  char *image_label;
  char *label;
  gint32 *images;
  gint32 *layers;
  gint32 layer;
  int nimages;
  int nlayers;
  int i, j, k;

  menu = gtk_menu_new ();
  gtk_object_set_user_data (GTK_OBJECT (menu), (gpointer) callback);
  gtk_object_set_data (GTK_OBJECT (menu), "gimp_callback_data", data);

  layer = -1;

  images = gimp_query_images (&nimages);
  for (i = 0, k = 0; i < nimages; i++)
    if (!constraint || (* constraint) (images[i], -1, data))
      {
	name = gimp_image_get_filename (images[i]);
	image_label = g_new (char, strlen (name) + 16);
	sprintf (image_label, "%s-%d", gimp_base_name (name), images[i]);
	g_free (name);

	layers = gimp_image_get_layers (images[i], &nlayers);
	for (j = 0; j < nlayers; j++)
	  if (!constraint || (* constraint) (images[i], layers[j], data))
	    {
	      name = gimp_layer_get_name (layers[j]);
	      label = g_new (char, strlen (image_label) + strlen (name) + 2);
	      sprintf (label, "%s/%s", image_label, name);
	      g_free (name);

	      menuitem = gtk_menu_item_new_with_label (label);
	      gtk_signal_connect (GTK_OBJECT (menuitem), "activate",
				  (GtkSignalFunc) gimp_menu_callback,
				  &layers[j]);
	      gtk_menu_append (GTK_MENU (menu), menuitem);
	      gtk_widget_show (menuitem);

	      g_free (label);

	      if (layers[j] == active_layer)
		{
		  layer = active_layer;
		  gtk_menu_set_active (GTK_MENU (menu), k);
		}
	      else if (layer == -1)
		layer = layers[j];

	      k += 1;
	    }

	g_free (image_label);
      }
  g_free (images);

  if (k == 0)
    {
      menuitem = gtk_menu_item_new_with_label ("none");
      gtk_widget_set_sensitive (menuitem, FALSE);
      gtk_menu_append (GTK_MENU (menu), menuitem);
      gtk_widget_show (menuitem);
    }

  if (layer != -1)
    (* callback) (layer, data);

  return menu;
}

GtkWidget*
gimp_channel_menu_new (GimpConstraintFunc constraint,
		       GimpMenuCallback   callback,
		       gpointer           data,
		       gint32             active_channel)
{
  GtkWidget *menu;
  GtkWidget *menuitem;
  char *name;
  char *image_label;
  char *label;
  gint32 *images;
  gint32 *channels;
  gint32 channel;
  int nimages;
  int nchannels;
  int i, j, k;

  menu = gtk_menu_new ();
  gtk_object_set_user_data (GTK_OBJECT (menu), (gpointer) callback);
  gtk_object_set_data (GTK_OBJECT (menu), "gimp_callback_data", data);

  channel = -1;

  images = gimp_query_images (&nimages);
  for (i = 0, k = 0; i < nimages; i++)
    if (!constraint || (* constraint) (images[i], -1, data))
      {
	name = gimp_image_get_filename (images[i]);
	image_label = g_new (char, strlen (name) + 16);
	sprintf (image_label, "%s-%d", gimp_base_name (name), images[i]);
	g_free (name);

	channels = gimp_image_get_channels (images[i], &nchannels);
	for (j = 0; j < nchannels; j++)
	  if (!constraint || (* constraint) (images[i], channels[j], data))
	    {
	      name = gimp_channel_get_name (channels[j]);
	      label = g_new (char, strlen (image_label) + strlen (name) + 2);
	      sprintf (label, "%s/%s", image_label, name);
	      g_free (name);

	      menuitem = gtk_menu_item_new_with_label (label);
	      gtk_signal_connect (GTK_OBJECT (menuitem), "activate",
				  (GtkSignalFunc) gimp_menu_callback,
				  &channels[j]);
	      gtk_menu_append (GTK_MENU (menu), menuitem);
	      gtk_widget_show (menuitem);

	      g_free (label);

	      if (channels[j] == active_channel)
		{
		  channel = active_channel;
		  gtk_menu_set_active (GTK_MENU (menu), k);
		}
	      else if (channel == -1)
		channel = channels[j];

	      k += 1;
	    }

	g_free (image_label);
      }
  g_free (images);

  if (k == 0)
    {
      menuitem = gtk_menu_item_new_with_label ("none");
      gtk_widget_set_sensitive (menuitem, FALSE);
      gtk_menu_append (GTK_MENU (menu), menuitem);
      gtk_widget_show (menuitem);
    }

  if (channel != -1)
    (* callback) (channel, data);

  return menu;
}

GtkWidget*
gimp_drawable_menu_new (GimpConstraintFunc constraint,
			GimpMenuCallback   callback,
			gpointer           data,
			gint32             active_drawable)
{
  GtkWidget *menu;
  GtkWidget *menuitem;
  char *name;
  char *image_label;
  char *label;
  gint32 *images;
  gint32 *layers;
  gint32 *channels;
  gint32 drawable;
  int nimages;
  int nlayers;
  int nchannels;
  int i, j, k;

  menu = gtk_menu_new ();
  gtk_object_set_user_data (GTK_OBJECT (menu), (gpointer) callback);
  gtk_object_set_data (GTK_OBJECT (menu), "gimp_callback_data", data);

  drawable = -1;

  images = gimp_query_images (&nimages);
  for (i = 0, k = 0; i < nimages; i++)
    if (!constraint || (* constraint) (images[i], -1, data))
      {
	name = gimp_image_get_filename (images[i]);
	image_label = g_new (char, strlen (name) + 16);
	sprintf (image_label, "%s-%d", gimp_base_name (name), images[i]);
	g_free (name);

	layers = gimp_image_get_layers (images[i], &nlayers);
	for (j = 0; j < nlayers; j++)
	  if (!constraint || (* constraint) (images[i], layers[j], data))
	    {
	      name = gimp_layer_get_name (layers[j]);
	      label = g_new (char, strlen (image_label) + strlen (name) + 2);
	      sprintf (label, "%s/%s", image_label, name);
	      g_free (name);

	      menuitem = gtk_menu_item_new_with_label (label);
	      gtk_signal_connect (GTK_OBJECT (menuitem), "activate",
				  (GtkSignalFunc) gimp_menu_callback,
				  &layers[j]);
	      gtk_menu_append (GTK_MENU (menu), menuitem);
	      gtk_widget_show (menuitem);

	      g_free (label);

	      if (layers[j] == active_drawable)
		{
		  drawable = active_drawable;
		  gtk_menu_set_active (GTK_MENU (menu), k);
		}
	      else if (drawable == -1)
		drawable = layers[j];

	      k += 1;
	    }

	channels = gimp_image_get_channels (images[i], &nchannels);
	for (j = 0; j < nchannels; j++)
	  if (!constraint || (* constraint) (images[i], channels[j], data))
	    {
	      name = gimp_channel_get_name (channels[j]);
	      label = g_new (char, strlen (image_label) + strlen (name) + 2);
	      sprintf (label, "%s/%s", image_label, name);
	      g_free (name);

	      menuitem = gtk_menu_item_new_with_label (label);
	      gtk_signal_connect (GTK_OBJECT (menuitem), "activate",
				  (GtkSignalFunc) gimp_menu_callback,
				  &channels[j]);
	      gtk_menu_append (GTK_MENU (menu), menuitem);
	      gtk_widget_show (menuitem);

	      g_free (label);

	      if (channels[j] == active_drawable)
		{
		  drawable = active_drawable;
		  gtk_menu_set_active (GTK_MENU (menu), k);
		}
	      else if (drawable == -1)
		drawable = channels[j];

	      k += 1;
	    }

	g_free (image_label);
      }
  g_free (images);

  if (k == 0)
    {
      menuitem = gtk_menu_item_new_with_label ("none");
      gtk_widget_set_sensitive (menuitem, FALSE);
      gtk_menu_append (GTK_MENU (menu), menuitem);
      gtk_widget_show (menuitem);
    }

  if (drawable != -1)
    (* callback) (drawable, data);

  return menu;
}


static char*
gimp_base_name (char *str)
{
  char *t;

  t = strrchr (str, '/');
  if (!t)
    return str;
  return t+1;
}

static void
gimp_menu_callback (GtkWidget *w,
		    gint32    *id)
{
  GimpMenuCallback callback;
  gpointer callback_data;

  callback = (GimpMenuCallback) gtk_object_get_user_data (GTK_OBJECT (w->parent));
  callback_data = gtk_object_get_data (GTK_OBJECT (w->parent), "gimp_callback_data");

  (* callback) (*id, callback_data);
}


/* These functions allow the callback PDB work with gtk
 * ALT.
 * Note that currently PDB calls in libgimp are completely deterministic.
 * There is always one call followed by a reply.
 * If we are in the main gdk wait routine we can cannot get a reply
 * to a wire message, only the request for a new PDB proc to be run.
 * we will restrict this to a temp PDB function we have registered.
 */

/* Copy data from temp_PDB call */
struct _GBrush_data {
  gint busy;
  gchar * bname;
  gdouble opacity;
  gint spacing;
  gint paint_mode;
  gint width;
  gint height;
  gchar * brush_mask_data;
  GRunBrushCallback callback;
  gint closing;
};

typedef struct _GBrush_data GBrush_data;

static GHashTable * gbrush_ht = NULL;
static GBrush_data * active_brush_pdb = NULL;

static void 
do_brush_callback(GBrush_data * bdata)
{
  if(!bdata->busy)
    return;

  if(bdata->callback)
    bdata->callback(bdata->bname,
		    bdata->opacity,
		    bdata->spacing,
		    bdata->paint_mode,
		    bdata->width,
		    bdata->height,
		    bdata->brush_mask_data,
		    bdata->closing);

  if(bdata->bname)
    g_free(bdata->bname);  
  
  if(bdata->brush_mask_data)
    g_free(bdata->brush_mask_data); 

  bdata->busy = 0;
  bdata->bname = bdata->brush_mask_data = 0;
}

static gint
idle_test (GBrush_data * bd)
{
  do_brush_callback(bd);

  return FALSE;
}


static void
temp_brush_invoker(char    *name,
	     int      nparams,
	     GParam  *param,
	     int     *nreturn_vals,
	     GParam **return_vals)
{
  static GParam values[1];
  GStatusType status = STATUS_SUCCESS;
  GBrush_data *bdata = (GBrush_data *)g_hash_table_lookup(gbrush_ht,name);

  if(!bdata)
    {
      g_warning("Can't find internal brush data");
    }
  else
    {
      if(!bdata->busy)
	{
	  /*       printf("\nXX  Here I am in the temp proc\n"); */
	  
	  /*       printf("String name passed is '%s'\n",param[0].data.d_string); */
	  /*       printf("opacity is '%g'\n",(gdouble)param[1].data.d_float); */
	  /*       printf("spacing is '%d'\n",param[2].data.d_int32); */
	  /*       printf("paint mode is '%d'\n",param[3].data.d_int32); */
	  /*       printf("width is '%d'\n",param[4].data.d_int32); */
	  /*       printf("height is '%d'\n",param[5].data.d_int32); */
	  /*       printf("String mask data length passed is '%d'\n",param[6].data.d_int32); */
	  /*       printf("closing is '%d'\n",param[8].data.d_int32); */
      
	  bdata->bname = g_strdup(param[0].data.d_string);
	  bdata->opacity = (gdouble)param[1].data.d_float;
	  bdata->spacing = param[2].data.d_int32;
	  bdata->paint_mode = param[3].data.d_int32;
	  bdata->width = param[4].data.d_int32;
	  bdata->height = param[5].data.d_int32;
	  bdata->brush_mask_data = g_malloc(param[6].data.d_int32);
	  g_memmove(bdata->brush_mask_data,param[7].data.d_int8array,param[6].data.d_int32); 
	  bdata->closing = param[8].data.d_int32;
	  active_brush_pdb = bdata;
	  bdata->busy = 1;
	  
	  gtk_idle_add((GtkFunction) idle_test,active_brush_pdb);
	}
    }

  *nreturn_vals = 1;
  *return_vals = values;
  
  values[0].type = PARAM_STATUS;
  values[0].data.d_status = status;
}

extern void gimp_run_temp(); /* gimp.c */

void input_callback( gpointer          data,
                     gint              source,
                     GdkInputCondition condition )
{
  /* We have some data in the wire - read it */
  /* The below will only ever run a single proc */
  gimp_run_temp();

}

static void
gimp_setup_callbacks()
{
  static int first_time = TRUE;
  extern int _readfd;
  if(first_time)
    {
      /* Tie into the gdk input function */
      /* only once */
      gdk_input_add(_readfd,GDK_INPUT_READ,input_callback,NULL);
      first_time = FALSE;
    }
}

static gchar *
gen_temp_plugin_name()
{
  GParam *return_vals;
  int nreturn_vals;
  char *result;

  return_vals = gimp_run_procedure ("gimp_temp_PDB_name",
				    &nreturn_vals,
				    PARAM_END);

  result = "temp_name_gen_failed";
  if (return_vals[0].data.d_status == STATUS_SUCCESS)
    result = g_strdup (return_vals[1].data.d_string);

  gimp_destroy_params (return_vals, nreturn_vals);

  return result;
}


/* Can only be used in conjuction with gdk since we need to tie into the input 
 * selection mech.
 */
void
gimp_interactive_selection_brush(gchar *dialogname, gchar *brush_name,GRunBrushCallback callback)
{
  static GParamDef args[] =
  {
    { PARAM_STRING, "str", "String"},
    { PARAM_FLOAT, "opacity", "Opacity"},
    { PARAM_INT32, "spacing", "spacing"},
    { PARAM_INT32, "paint mode","paint mode"},
    { PARAM_INT32, "mask width","brush width"},
    { PARAM_INT32, "mask height","brush heigth"},
    { PARAM_INT32, "mask len","Length of brush mask data"},
    { PARAM_INT8ARRAY,"mask data","The brush mask data"},
    { PARAM_INT32, "dialog status","Registers if the dialog was closing [0 = No, 1 = Yes]"},
  };
  static GParamDef *return_vals = NULL;
  static int nargs = sizeof (args) / sizeof (args[0]);
  static int nreturn_vals = 0;
  gint bnreturn_vals;
  GParam *pdbreturn_vals;
  gchar *pdbname = gen_temp_plugin_name();
  GBrush_data *bdata = g_malloc0(sizeof(struct _GBrush_data));

  gimp_install_temp_proc (pdbname,
			  "Temp PDB for interactive popups",
			  "More here later",
			  "Andy Thomas",
			  "Andy Thomas",
			  "1997",
			  NULL,
			  "RGB*, GRAY*",
			  PROC_TEMPORARY,
			  nargs, nreturn_vals,
			  args, return_vals,
			  temp_brush_invoker);

  pdbreturn_vals =
    gimp_run_procedure("gimp_brushes_popup",
		       &bnreturn_vals,
		       PARAM_STRING,pdbname,
		       PARAM_STRING,dialogname,
		       PARAM_STRING,brush_name,/*name*/
		       PARAM_FLOAT, 1.0, /*Opacity*/
		       PARAM_INT32, -1, /*default spacing*/
		       PARAM_INT32, 0, /*paint mode*/
		       PARAM_END);

/*   if (pdbreturn_vals[0].data.d_status != STATUS_SUCCESS) */
/*     { */
/*       printf("ret failed = 0x%x\n",bnreturn_vals); */
/*     } */
/*   else */
/*       printf("worked = 0x%x\n",bnreturn_vals); */

  gimp_setup_callbacks(); /* New function to allow callbacks to be watched */

  gimp_destroy_params (pdbreturn_vals,bnreturn_vals);

  /*   g_free(pdbname); */

  /* Now add to hash table so we can find it again */
  if(gbrush_ht == NULL)
    gbrush_ht = g_hash_table_new (g_str_hash,
				      g_str_equal);

  bdata->callback = callback;
  g_hash_table_insert(gbrush_ht,pdbname,bdata);

}