[andy/viking.git] / src / viklayer.c

/*
 * viking -- GPS Data and Topo Analyzer, Explorer, and Manager
 *
 * Copyright (C) 2003-2005, Evan Battaglia <gtoevan@gmx.net>
 *
 * This program 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 of the License, or
 * (at your option) any later version.
 *
 * This program 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 this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 *
 */

#ifdef HAVE_CONFIG_H
#include "config.h"
#endif

#include <glib/gi18n.h>

#include "viking.h"
#include <string.h>

/* functions common to all layers. */
/* TODO longone: rename interface free -> finalize */

extern VikLayerInterface vik_aggregate_layer_interface;
extern VikLayerInterface vik_trw_layer_interface;
extern VikLayerInterface vik_maps_layer_interface;
extern VikLayerInterface vik_coord_layer_interface;
extern VikLayerInterface vik_georef_layer_interface;
extern VikLayerInterface vik_gps_layer_interface;
extern VikLayerInterface vik_dem_layer_interface;

enum {
  VL_UPDATE_SIGNAL,
  VL_LAST_SIGNAL
};
static guint layer_signals[VL_LAST_SIGNAL] = { 0 };

static GObjectClass *parent_class;

static void layer_class_init ( VikLayerClass *klass );
static void layer_init ( VikLayer *vl );
static void layer_finalize ( VikLayer *vl );
static gboolean layer_properties_factory ( VikLayer *vl, VikViewport *vp );


/* TODO longone: rename vik_layer_init -> set_type */

GType vik_layer_get_type ()
{
  static GType vl_type = 0;

  if (!vl_type)
  {
    static const GTypeInfo vl_info =
    {
      sizeof (VikLayerClass),
      NULL, /* base_init */
      NULL, /* base_finalize */
      (GClassInitFunc) layer_class_init, /* class init */
      NULL, /* class_finalize */
      NULL, /* class_data */
      sizeof (VikLayer),
      0,
      (GInstanceInitFunc) layer_init /* instance init */
    };
    vl_type = g_type_register_static ( G_TYPE_OBJECT, "VikLayer", &vl_info, 0 );
  }

  return vl_type;
}

static void layer_class_init (VikLayerClass *klass)
{
  GObjectClass *object_class;

  object_class = G_OBJECT_CLASS (klass);

  object_class->finalize = (GObjectFinalizeFunc) layer_finalize;

  parent_class = g_type_class_peek_parent (klass);

  layer_signals[VL_UPDATE_SIGNAL] = g_signal_new ( "update", G_TYPE_FROM_CLASS (klass),
      G_SIGNAL_RUN_FIRST | G_SIGNAL_ACTION, G_STRUCT_OFFSET (VikLayerClass, update), NULL, NULL, 
      g_cclosure_marshal_VOID__VOID, G_TYPE_NONE, 0);
}

void vik_layer_emit_update ( VikLayer *vl )
{
  if ( vl->visible ) {
    vik_window_set_redraw_trigger(vl);
    g_signal_emit ( G_OBJECT(vl), layer_signals[VL_UPDATE_SIGNAL], 0 );
  }
}

/* should only be done by VikLayersPanel -- need to redraw and record trigger
 * when we make a layer invisible.
 */
void vik_layer_emit_update_although_invisible ( VikLayer *vl )
{
  vik_window_set_redraw_trigger(vl);
  g_signal_emit ( G_OBJECT(vl), layer_signals[VL_UPDATE_SIGNAL], 0 );
}

/* doesn't set the trigger. should be done by aggregate layer when child emits update. */
void vik_layer_emit_update_secondary ( VikLayer *vl )
{
  if ( vl->visible )
    g_signal_emit ( G_OBJECT(vl), layer_signals[VL_UPDATE_SIGNAL], 0 );
}

static VikLayerInterface *vik_layer_interfaces[VIK_LAYER_NUM_TYPES] = {
  &vik_aggregate_layer_interface,
  &vik_trw_layer_interface,
  &vik_coord_layer_interface,
  &vik_georef_layer_interface,
  &vik_gps_layer_interface,
  &vik_maps_layer_interface,
  &vik_dem_layer_interface,
};

VikLayerInterface *vik_layer_get_interface ( gint type )
{
  g_assert ( type < VIK_LAYER_NUM_TYPES );
  return vik_layer_interfaces[type];
}

static void layer_init ( VikLayer *vl )
{
  vl->visible = TRUE;
  vl->name = NULL;
  vl->realized = FALSE;
}

void vik_layer_init ( VikLayer *vl, gint type )
{
  vl->type = type;
}

/* frees old name */
void vik_layer_rename ( VikLayer *l, const gchar *new_name )
{
  g_assert ( l != NULL );
  g_assert ( new_name != NULL );
  g_free ( l->name );
  l->name = g_strdup ( new_name );
}

void vik_layer_rename_no_copy ( VikLayer *l, gchar *new_name )
{
  g_assert ( l != NULL );
  g_assert ( new_name != NULL );
  g_free ( l->name );
  l->name = new_name;
}

const gchar *vik_layer_get_name ( VikLayer *l )
{
  g_assert ( l != NULL);
  return l->name;
}

VikLayer *vik_layer_create ( gint type, gpointer vp, GtkWindow *w, gboolean interactive )
{
  VikLayer *new_layer = NULL;
  g_assert ( type < VIK_LAYER_NUM_TYPES );

  new_layer = vik_layer_interfaces[type]->create ( vp );

  g_assert ( new_layer != NULL );

  if ( interactive )
  {
    if ( vik_layer_properties ( new_layer, vp ) )
      /* We translate the name here */
      /* in order to avoid translating name set by user */
      vik_layer_rename ( VIK_LAYER(new_layer), _(vik_layer_interfaces[type]->name) );
    else
    {
      g_object_unref ( G_OBJECT(new_layer) ); /* cancel that */
      new_layer = NULL;
    }
  }
  return new_layer;
}

/* returns TRUE if OK was pressed */
gboolean vik_layer_properties ( VikLayer *layer, gpointer vp )
{
  if ( vik_layer_interfaces[layer->type]->properties )
    return vik_layer_interfaces[layer->type]->properties ( layer, vp );
  return layer_properties_factory ( layer, vp );
}

void vik_layer_draw ( VikLayer *l, gpointer data )
{
  if ( l->visible )
    if ( vik_layer_interfaces[l->type]->draw )
      vik_layer_interfaces[l->type]->draw ( l, data );
}

void vik_layer_change_coord_mode ( VikLayer *l, VikCoordMode mode )
{
  if ( vik_layer_interfaces[l->type]->change_coord_mode )
    vik_layer_interfaces[l->type]->change_coord_mode ( l, mode );
}

typedef struct {
  gint layer_type;
  gint len;
  guint8 data[0];
} header_t;

void vik_layer_marshall ( VikLayer *vl, guint8 **data, gint *len )
{
  header_t *header;
  if ( vl && vik_layer_interfaces[vl->type]->marshall ) {
    vik_layer_interfaces[vl->type]->marshall ( vl, data, len );
    if (*data) {
      header = g_malloc(*len + sizeof(*header));
      header->layer_type = vl->type;
      header->len = *len;
      memcpy(header->data, *data, *len);
      g_free(*data);
      *data = (guint8 *)header;
      *len = *len + sizeof(*header);
    }
  } else {
    *data = NULL;
  }
}

void vik_layer_marshall_params ( VikLayer *vl, guint8 **data, gint *datalen )
{
  VikLayerParam *params = vik_layer_get_interface(vl->type)->params;
  VikLayerFuncGetParam get_param = vik_layer_get_interface(vl->type)->get_param;
  GByteArray* b = g_byte_array_new ();
  gint len;

#define vlm_append(obj, sz) 	\
  len = (sz);    		\
  g_byte_array_append ( b, (guint8 *)&len, sizeof(len) );	\
  g_byte_array_append ( b, (guint8 *)(obj), len );

  vlm_append(vl->name, strlen(vl->name));

  if ( params && get_param )
  {
    VikLayerParamData d;
    guint16 i, params_count = vik_layer_get_interface(vl->type)->params_count;
    for ( i = 0; i < params_count; i++ )
    {
      d = get_param(vl, i);
      switch ( params[i].type )
      {
      case VIK_LAYER_PARAM_STRING: 
	vlm_append(d.s, strlen(d.s));
	break;

      /* print out the string list in the array */
      case VIK_LAYER_PARAM_STRING_LIST: {
        GList *list = d.sl;
        
        /* write length of list (# of strings) */
        gint listlen = g_list_length ( list );
        g_byte_array_append ( b, (guint8 *)&listlen, sizeof(listlen) );

        /* write each string */
        while ( list ) {
          gchar *s = (gchar *) list->data;
          vlm_append(s, strlen(s));
          list = list->next;
        }

	break;
      }
      default:
	vlm_append(&d, sizeof(d));
	break;
      }
    }
  }
  
  *data = b->data;
  *datalen = b->len;
  g_byte_array_free ( b, FALSE );

#undef vlm_append
}

void vik_layer_unmarshall_params ( VikLayer *vl, guint8 *data, gint datalen, VikViewport *vvp )
{
  VikLayerParam *params = vik_layer_get_interface(vl->type)->params;
  VikLayerFuncSetParam set_param = vik_layer_get_interface(vl->type)->set_param;
  gchar *s;
  guint8 *b = (guint8 *)data;
  
#define vlm_size (*(gint *)b)
#define vlm_read(obj)				\
  memcpy((obj), b+sizeof(gint), vlm_size);	\
  b += sizeof(gint) + vlm_size;
  
  s = g_malloc(vlm_size + 1);
  s[vlm_size]=0;
  vlm_read(s);
  
  vik_layer_rename(vl, s);
  
  g_free(s);

  if ( params && set_param )
  {
    VikLayerParamData d;
    guint16 i, params_count = vik_layer_get_interface(vl->type)->params_count;
    for ( i = 0; i < params_count; i++ )
    {
      switch ( params[i].type )
      {
      case VIK_LAYER_PARAM_STRING: 
	s = g_malloc(vlm_size + 1);
	s[vlm_size]=0;
	vlm_read(s);
	d.s = s;
	set_param(vl, i, d, vvp);
	g_free(s);
	break;
      case VIK_LAYER_PARAM_STRING_LIST:  {
        gint listlen = vlm_size, j;
        GList *list = NULL;
        b += sizeof(gint); /* skip listlen */;

        for ( j = 0; j < listlen; j++ ) {
          /* get a string */
          s = g_malloc(vlm_size + 1);
	  s[vlm_size]=0;
	  vlm_read(s);
          list = g_list_append ( list, s );
        }
        d.sl = list;
        set_param ( vl, i, d, vvp );
        /* don't free -- string list is responsibility of the layer */

        break;
        }
      default:
	vlm_read(&d);
	set_param(vl, i, d, vvp);
	break;
      }
    }
  }
}

VikLayer *vik_layer_unmarshall ( guint8 *data, gint len, VikViewport *vvp )
{
  header_t *header;

  header = (header_t *)data;
  
  if ( vik_layer_interfaces[header->layer_type]->unmarshall ) {
    return vik_layer_interfaces[header->layer_type]->unmarshall ( header->data, header->len, vvp );
  } else {
    return NULL;
  }
}

static void layer_finalize ( VikLayer *vl )
{
  g_assert ( vl != NULL );
  if ( vik_layer_interfaces[vl->type]->free )
    vik_layer_interfaces[vl->type]->free ( vl );
  if ( vl->name )
    g_free ( vl->name );
  G_OBJECT_CLASS(parent_class)->finalize(G_OBJECT(vl));
}

/* sublayer switching */
gboolean vik_layer_sublayer_toggle_visible ( VikLayer *l, gint subtype, gpointer sublayer )
{
  if ( vik_layer_interfaces[l->type]->sublayer_toggle_visible )
    return vik_layer_interfaces[l->type]->sublayer_toggle_visible ( l, subtype, sublayer );
  return TRUE; /* if unknown, will always be visible */
}

void vik_layer_realize ( VikLayer *l, VikTreeview *vt, GtkTreeIter *layer_iter )
{
  l->vt = vt;
  l->iter = *layer_iter;
  l->realized = TRUE;
  if ( vik_layer_interfaces[l->type]->realize )
    vik_layer_interfaces[l->type]->realize ( l, vt, layer_iter );
}

void vik_layer_set_menu_items_selection(VikLayer *l, guint16 selection)
{
  if ( vik_layer_interfaces[l->type]->set_menu_selection )
    vik_layer_interfaces[l->type]->set_menu_selection ( l, selection );
}

guint16 vik_layer_get_menu_items_selection(VikLayer *l)
{
  if ( vik_layer_interfaces[l->type]->get_menu_selection )
    return(vik_layer_interfaces[l->type]->get_menu_selection (l));
  else
    return(vik_layer_interfaces[l->type]->menu_items_selection);
}

void vik_layer_add_menu_items ( VikLayer *l, GtkMenu *menu, gpointer vlp )
{
  if ( vik_layer_interfaces[l->type]->add_menu_items )
    vik_layer_interfaces[l->type]->add_menu_items ( l, menu, vlp );
}

gboolean vik_layer_sublayer_add_menu_items ( VikLayer *l, GtkMenu *menu, gpointer vlp, gint subtype, gpointer sublayer, GtkTreeIter *iter )
{
  if ( vik_layer_interfaces[l->type]->sublayer_add_menu_items )
    return vik_layer_interfaces[l->type]->sublayer_add_menu_items ( l, menu, vlp, subtype, sublayer, iter );
  return FALSE;
}


const gchar *vik_layer_sublayer_rename_request ( VikLayer *l, const gchar *newname, gpointer vlp, gint subtype, gpointer sublayer, GtkTreeIter *iter )
{
  if ( vik_layer_interfaces[l->type]->sublayer_rename_request )
    return vik_layer_interfaces[l->type]->sublayer_rename_request ( l, newname, vlp, subtype, sublayer, iter );
  return NULL;
}

GdkPixbuf *vik_layer_load_icon ( gint type )
{
  g_assert ( type < VIK_LAYER_NUM_TYPES );
  if ( vik_layer_interfaces[type]->icon )
    return gdk_pixbuf_from_pixdata ( vik_layer_interfaces[type]->icon, FALSE, NULL );
  return NULL;
}

gboolean vik_layer_set_param ( VikLayer *layer, guint16 id, VikLayerParamData data, gpointer vp )
{
  if ( vik_layer_interfaces[layer->type]->set_param )
    return vik_layer_interfaces[layer->type]->set_param ( layer, id, data, vp );
  return FALSE;
}

void vik_layer_post_read ( VikLayer *layer, VikViewport *vp, gboolean from_file )
{
  if ( vik_layer_interfaces[layer->type]->post_read )
    vik_layer_interfaces[layer->type]->post_read ( layer, vp, from_file );
}

static gboolean layer_properties_factory ( VikLayer *vl, VikViewport *vp )
{
  switch ( a_uibuilder_properties_factory ( VIK_GTK_WINDOW_FROM_WIDGET(vp),
					    vik_layer_interfaces[vl->type]->params,
					    vik_layer_interfaces[vl->type]->params_count,
					    vik_layer_interfaces[vl->type]->params_groups,
					    vik_layer_interfaces[vl->type]->params_groups_count,
					    (gpointer) vik_layer_interfaces[vl->type]->set_param, 
					    vl, 
					    vp,
					    (gpointer) vik_layer_interfaces[vl->type]->get_param, 
					    vl) ) {
    case 0:
    case 3:
      return FALSE;
      /* redraw (?) */
    case 2:
      vik_layer_post_read ( vl, vp, FALSE ); /* update any gc's */
    default:
      return TRUE;
  }
}
Commit	Line	Data
50a14534 EB	1	/*
	2	* viking -- GPS Data and Topo Analyzer, Explorer, and Manager
	3	*
	4	* Copyright (C) 2003-2005, Evan Battaglia <gtoevan@gmx.net>
	5	*
	6	* This program is free software; you can redistribute it and/or modify
	7	* it under the terms of the GNU General Public License as published by
	8	* the Free Software Foundation; either version 2 of the License, or
	9	* (at your option) any later version.
	10	*
	11	* This program is distributed in the hope that it will be useful,
	12	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	13	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	14	* GNU General Public License for more details.
	15	*
	16	* You should have received a copy of the GNU General Public License
	17	* along with this program; if not, write to the Free Software
	18	* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
	19	*
	20	*/
	21
4c77d5e0 GB	22	#ifdef HAVE_CONFIG_H
	23	#include "config.h"
	24	#endif
	25
	26	#include <glib/gi18n.h>
	27
50a14534	28	#include "viking.h"
911400b5	29	#include <string.h>
50a14534 EB	30
	31	/* functions common to all layers. */
	32	/* TODO longone: rename interface free -> finalize */
	33
	34	extern VikLayerInterface vik_aggregate_layer_interface;
	35	extern VikLayerInterface vik_trw_layer_interface;
	36	extern VikLayerInterface vik_maps_layer_interface;
	37	extern VikLayerInterface vik_coord_layer_interface;
	38	extern VikLayerInterface vik_georef_layer_interface;
b364d6bc	39	extern VikLayerInterface vik_gps_layer_interface;
ad0a8c2d	40	extern VikLayerInterface vik_dem_layer_interface;
50a14534 EB	41
	42	enum {
	43	VL_UPDATE_SIGNAL,
	44	VL_LAST_SIGNAL
	45	};
	46	static guint layer_signals[VL_LAST_SIGNAL] = { 0 };
	47
	48	static GObjectClass *parent_class;
	49
	50	static void layer_class_init ( VikLayerClass *klass );
	51	static void layer_init ( VikLayer *vl );
	52	static void layer_finalize ( VikLayer *vl );
94933cb8	53	static gboolean layer_properties_factory ( VikLayer vl, VikViewport vp );
50a14534 EB	54
	55
	56	/* TODO longone: rename vik_layer_init -> set_type */
	57
	58	GType vik_layer_get_type ()
	59	{
	60	static GType vl_type = 0;
	61
	62	if (!vl_type)
	63	{
	64	static const GTypeInfo vl_info =
	65	{
	66	sizeof (VikLayerClass),
	67	NULL, /* base_init */
	68	NULL, /* base_finalize */
	69	(GClassInitFunc) layer_class_init, /* class init */
	70	NULL, /* class_finalize */
	71	NULL, /* class_data */
	72	sizeof (VikLayer),
	73	0,
	74	(GInstanceInitFunc) layer_init /* instance init */
	75	};
	76	vl_type = g_type_register_static ( G_TYPE_OBJECT, "VikLayer", &vl_info, 0 );
	77	}
	78
	79	return vl_type;
	80	}
	81
	82	static void layer_class_init (VikLayerClass *klass)
	83	{
	84	GObjectClass *object_class;
	85
	86	object_class = G_OBJECT_CLASS (klass);
	87
	88	object_class->finalize = (GObjectFinalizeFunc) layer_finalize;
	89
	90	parent_class = g_type_class_peek_parent (klass);
	91
	92	layer_signals[VL_UPDATE_SIGNAL] = g_signal_new ( "update", G_TYPE_FROM_CLASS (klass),
	93	G_SIGNAL_RUN_FIRST \| G_SIGNAL_ACTION, G_STRUCT_OFFSET (VikLayerClass, update), NULL, NULL,
	94	g_cclosure_marshal_VOID__VOID, G_TYPE_NONE, 0);
	95	}
	96
	97	void vik_layer_emit_update ( VikLayer *vl )
0df66d57 EB	98	{
0df66d57 EB	99	if ( vl->visible ) {
c9177aae	100	vik_window_set_redraw_trigger(vl);
0df66d57 EB	101	g_signal_emit ( G_OBJECT(vl), layer_signals[VL_UPDATE_SIGNAL], 0 );
	102	}
	103	}
	104
	105	/* should only be done by VikLayersPanel -- need to redraw and record trigger
	106	* when we make a layer invisible.
	107	*/
	108	void vik_layer_emit_update_although_invisible ( VikLayer *vl )
	109	{
c9177aae	110	vik_window_set_redraw_trigger(vl);
0df66d57 EB	111	g_signal_emit ( G_OBJECT(vl), layer_signals[VL_UPDATE_SIGNAL], 0 );
	112	}
	113
0df66d57 EB	114	/* doesn't set the trigger. should be done by aggregate layer when child emits update. */
0df66d57 EB	115	void vik_layer_emit_update_secondary ( VikLayer *vl )
50a14534 EB	116	{
	117	if ( vl->visible )
	118	g_signal_emit ( G_OBJECT(vl), layer_signals[VL_UPDATE_SIGNAL], 0 );
	119	}
	120
	121	static VikLayerInterface *vik_layer_interfaces[VIK_LAYER_NUM_TYPES] = {
	122	&vik_aggregate_layer_interface,
	123	&vik_trw_layer_interface,
	124	&vik_coord_layer_interface,
	125	&vik_georef_layer_interface,
b364d6bc	126	&vik_gps_layer_interface,
50a14534	127	&vik_maps_layer_interface,
ad0a8c2d	128	&vik_dem_layer_interface,
50a14534 EB	129	};
	130
	131	VikLayerInterface *vik_layer_get_interface ( gint type )
	132	{
	133	g_assert ( type < VIK_LAYER_NUM_TYPES );
	134	return vik_layer_interfaces[type];
	135	}
	136
	137	static void layer_init ( VikLayer *vl )
	138	{
	139	vl->visible = TRUE;
	140	vl->name = NULL;
	141	vl->realized = FALSE;
	142	}
	143
	144	void vik_layer_init ( VikLayer *vl, gint type )
	145	{
	146	vl->type = type;
	147	}
	148
	149	/* frees old name */
	150	void vik_layer_rename ( VikLayer l, const gchar new_name )
	151	{
92558066 GB	152	g_assert ( l != NULL );
	153	g_assert ( new_name != NULL );
	154	g_free ( l->name );
50a14534 EB	155	l->name = g_strdup ( new_name );
	156	}
	157
	158	void vik_layer_rename_no_copy ( VikLayer l, gchar new_name )
	159	{
92558066 GB	160	g_assert ( l != NULL );
	161	g_assert ( new_name != NULL );
	162	g_free ( l->name );
50a14534 EB	163	l->name = new_name;
	164	}
	165
92558066 GB	166	const gchar vik_layer_get_name ( VikLayer l )
	167	{
	168	g_assert ( l != NULL);
	169	return l->name;
	170	}
	171
50a14534 EB	172	VikLayer vik_layer_create ( gint type, gpointer vp, GtkWindow w, gboolean interactive )
	173	{
	174	VikLayer *new_layer = NULL;
	175	g_assert ( type < VIK_LAYER_NUM_TYPES );
	176
	177	new_layer = vik_layer_interfaces[type]->create ( vp );
	178
	179	g_assert ( new_layer != NULL );
	180
	181	if ( interactive )
	182	{
	183	if ( vik_layer_properties ( new_layer, vp ) )
4c77d5e0 GB	184	/* We translate the name here */
	185	/* in order to avoid translating name set by user */
	186	vik_layer_rename ( VIK_LAYER(new_layer), _(vik_layer_interfaces[type]->name) );
50a14534 EB	187	else
	188	{
	189	g_object_unref ( G_OBJECT(new_layer) ); /* cancel that */
	190	new_layer = NULL;
	191	}
	192	}
	193	return new_layer;
	194	}
	195
	196	/* returns TRUE if OK was pressed */
	197	gboolean vik_layer_properties ( VikLayer *layer, gpointer vp )
	198	{
	199	if ( vik_layer_interfaces[layer->type]->properties )
	200	return vik_layer_interfaces[layer->type]->properties ( layer, vp );
	201	return layer_properties_factory ( layer, vp );
	202	}
	203
	204	void vik_layer_draw ( VikLayer *l, gpointer data )
	205	{
	206	if ( l->visible )
	207	if ( vik_layer_interfaces[l->type]->draw )
	208	vik_layer_interfaces[l->type]->draw ( l, data );
	209	}
	210
	211	void vik_layer_change_coord_mode ( VikLayer *l, VikCoordMode mode )
	212	{
	213	if ( vik_layer_interfaces[l->type]->change_coord_mode )
	214	vik_layer_interfaces[l->type]->change_coord_mode ( l, mode );
	215	}
	216
911400b5 AF	217	typedef struct {
	218	gint layer_type;
	219	gint len;
	220	guint8 data[0];
	221	} header_t;
	222
	223	void vik_layer_marshall ( VikLayer vl, guint8 data, gint len )
	224	{
	225	header_t *header;
	226	if ( vl && vik_layer_interfaces[vl->type]->marshall ) {
	227	vik_layer_interfaces[vl->type]->marshall ( vl, data, len );
	228	if (*data) {
	229	header = g_malloc(len + sizeof(header));
	230	header->layer_type = vl->type;
	231	header->len = *len;
	232	memcpy(header->data, data, len);
	233	g_free(*data);
	234	data = (guint8 )header;
	235	len = len + sizeof(*header);
	236	}
	237	} else {
	238	*data = NULL;
	239	}
	240	}
	241
	242	void vik_layer_marshall_params ( VikLayer vl, guint8 data, gint datalen )
	243	{
	244	VikLayerParam *params = vik_layer_get_interface(vl->type)->params;
	245	VikLayerFuncGetParam get_param = vik_layer_get_interface(vl->type)->get_param;
	246	GByteArray* b = g_byte_array_new ();
	247	gint len;
	248
	249	#define vlm_append(obj, sz) \
	250	len = (sz); \
	251	g_byte_array_append ( b, (guint8 *)&len, sizeof(len) ); \
	252	g_byte_array_append ( b, (guint8 *)(obj), len );
	253
	254	vlm_append(vl->name, strlen(vl->name));
	255
	256	if ( params && get_param )
	257	{
	258	VikLayerParamData d;
	259	guint16 i, params_count = vik_layer_get_interface(vl->type)->params_count;
	260	for ( i = 0; i < params_count; i++ )
	261	{
	262	d = get_param(vl, i);
	263	switch ( params[i].type )
	264	{
	265	case VIK_LAYER_PARAM_STRING:
	266	vlm_append(d.s, strlen(d.s));
	267	break;
fa86f1c0 EB	268
	269	/* print out the string list in the array */
	270	case VIK_LAYER_PARAM_STRING_LIST: {
	271	GList *list = d.sl;
	272
	273	/* write length of list (# of strings) */
	274	gint listlen = g_list_length ( list );
	275	g_byte_array_append ( b, (guint8 *)&listlen, sizeof(listlen) );
	276
	277	/* write each string */
	278	while ( list ) {
	279	gchar s = (gchar ) list->data;
	280	vlm_append(s, strlen(s));
	281	list = list->next;
	282	}
	283
	284	break;
	285	}
911400b5 AF	286	default:
	287	vlm_append(&d, sizeof(d));
	288	break;
	289	}
	290	}
	291	}
	292
	293	*data = b->data;
	294	*datalen = b->len;
	295	g_byte_array_free ( b, FALSE );
	296
	297	#undef vlm_append
	298	}
	299
	300	void vik_layer_unmarshall_params ( VikLayer vl, guint8 data, gint datalen, VikViewport *vvp )
	301	{
	302	VikLayerParam *params = vik_layer_get_interface(vl->type)->params;
	303	VikLayerFuncSetParam set_param = vik_layer_get_interface(vl->type)->set_param;
	304	gchar *s;
	305	guint8 b = (guint8 )data;
	306
	307	#define vlm_size ((gint )b)
	308	#define vlm_read(obj) \
	309	memcpy((obj), b+sizeof(gint), vlm_size); \
	310	b += sizeof(gint) + vlm_size;
	311
	312	s = g_malloc(vlm_size + 1);
	313	s[vlm_size]=0;
	314	vlm_read(s);
	315
	316	vik_layer_rename(vl, s);
	317
	318	g_free(s);
	319
	320	if ( params && set_param )
	321	{
	322	VikLayerParamData d;
	323	guint16 i, params_count = vik_layer_get_interface(vl->type)->params_count;
	324	for ( i = 0; i < params_count; i++ )
	325	{
	326	switch ( params[i].type )
	327	{
	328	case VIK_LAYER_PARAM_STRING:
	329	s = g_malloc(vlm_size + 1);
	330	s[vlm_size]=0;
	331	vlm_read(s);
	332	d.s = s;
	333	set_param(vl, i, d, vvp);
	334	g_free(s);
	335	break;
fa86f1c0 EB	336	case VIK_LAYER_PARAM_STRING_LIST: {
	337	gint listlen = vlm_size, j;
	338	GList *list = NULL;
	339	b += sizeof(gint); /* skip listlen */;
	340
	341	for ( j = 0; j < listlen; j++ ) {
	342	/* get a string */
	343	s = g_malloc(vlm_size + 1);
	344	s[vlm_size]=0;
	345	vlm_read(s);
	346	list = g_list_append ( list, s );
	347	}
	348	d.sl = list;
	349	set_param ( vl, i, d, vvp );
	350	/* don't free -- string list is responsibility of the layer */
	351
	352	break;
	353	}
911400b5 AF	354	default:
	355	vlm_read(&d);
	356	set_param(vl, i, d, vvp);
	357	break;
	358	}
	359	}
	360	}
	361	}
	362
	363	VikLayer vik_layer_unmarshall ( guint8 data, gint len, VikViewport *vvp )
	364	{
	365	header_t *header;
	366
	367	header = (header_t *)data;
	368
	369	if ( vik_layer_interfaces[header->layer_type]->unmarshall ) {
	370	return vik_layer_interfaces[header->layer_type]->unmarshall ( header->data, header->len, vvp );
	371	} else {
	372	return NULL;
	373	}
	374	}
50a14534 EB	375
	376	static void layer_finalize ( VikLayer *vl )
	377	{
	378	g_assert ( vl != NULL );
	379	if ( vik_layer_interfaces[vl->type]->free )
	380	vik_layer_interfaces[vl->type]->free ( vl );
	381	if ( vl->name )
	382	g_free ( vl->name );
	383	G_OBJECT_CLASS(parent_class)->finalize(G_OBJECT(vl));
	384	}
	385
	386	/* sublayer switching */
	387	gboolean vik_layer_sublayer_toggle_visible ( VikLayer *l, gint subtype, gpointer sublayer )
	388	{
	389	if ( vik_layer_interfaces[l->type]->sublayer_toggle_visible )
	390	return vik_layer_interfaces[l->type]->sublayer_toggle_visible ( l, subtype, sublayer );
	391	return TRUE; /* if unknown, will always be visible */
	392	}
	393
	394	void vik_layer_realize ( VikLayer l, VikTreeview vt, GtkTreeIter *layer_iter )
	395	{
	396	l->vt = vt;
	397	l->iter = *layer_iter;
	398	l->realized = TRUE;
	399	if ( vik_layer_interfaces[l->type]->realize )
	400	vik_layer_interfaces[l->type]->realize ( l, vt, layer_iter );
	401	}
	402
20c7a3a0 QT	403	void vik_layer_set_menu_items_selection(VikLayer *l, guint16 selection)
	404	{
	405	if ( vik_layer_interfaces[l->type]->set_menu_selection )
	406	vik_layer_interfaces[l->type]->set_menu_selection ( l, selection );
	407	}
	408
	409	guint16 vik_layer_get_menu_items_selection(VikLayer *l)
	410	{
	411	if ( vik_layer_interfaces[l->type]->get_menu_selection )
	412	return(vik_layer_interfaces[l->type]->get_menu_selection (l));
	413	else
	414	return(vik_layer_interfaces[l->type]->menu_items_selection);
	415	}
	416
50a14534 EB	417	void vik_layer_add_menu_items ( VikLayer l, GtkMenu menu, gpointer vlp )
	418	{
	419	if ( vik_layer_interfaces[l->type]->add_menu_items )
	420	vik_layer_interfaces[l->type]->add_menu_items ( l, menu, vlp );
	421	}
	422
	423	gboolean vik_layer_sublayer_add_menu_items ( VikLayer l, GtkMenu menu, gpointer vlp, gint subtype, gpointer sublayer, GtkTreeIter *iter )
	424	{
	425	if ( vik_layer_interfaces[l->type]->sublayer_add_menu_items )
	426	return vik_layer_interfaces[l->type]->sublayer_add_menu_items ( l, menu, vlp, subtype, sublayer, iter );
	427	return FALSE;
	428	}
	429
	430
	431	const gchar vik_layer_sublayer_rename_request ( VikLayer l, const gchar newname, gpointer vlp, gint subtype, gpointer sublayer, GtkTreeIter iter )
	432	{
	433	if ( vik_layer_interfaces[l->type]->sublayer_rename_request )
	434	return vik_layer_interfaces[l->type]->sublayer_rename_request ( l, newname, vlp, subtype, sublayer, iter );
	435	return NULL;
	436	}
	437
	438	GdkPixbuf *vik_layer_load_icon ( gint type )
	439	{
	440	g_assert ( type < VIK_LAYER_NUM_TYPES );
	441	if ( vik_layer_interfaces[type]->icon )
	442	return gdk_pixbuf_from_pixdata ( vik_layer_interfaces[type]->icon, FALSE, NULL );
	443	return NULL;
	444	}
	445
	446	gboolean vik_layer_set_param ( VikLayer *layer, guint16 id, VikLayerParamData data, gpointer vp )
	447	{
	448	if ( vik_layer_interfaces[layer->type]->set_param )
	449	return vik_layer_interfaces[layer->type]->set_param ( layer, id, data, vp );
	450	return FALSE;
	451	}
	452
07059501	453	void vik_layer_post_read ( VikLayer layer, VikViewport vp, gboolean from_file )
50a14534 EB	454	{
50a14534 EB	455	if ( vik_layer_interfaces[layer->type]->post_read )
07059501	456	vik_layer_interfaces[layer->type]->post_read ( layer, vp, from_file );
50a14534 EB	457	}
50a14534 EB	458
94933cb8	459	static gboolean layer_properties_factory ( VikLayer vl, VikViewport vp )
50a14534	460	{
28c82d8b	461	switch ( a_uibuilder_properties_factory ( VIK_GTK_WINDOW_FROM_WIDGET(vp),
dc2c040e RN	462	vik_layer_interfaces[vl->type]->params,
	463	vik_layer_interfaces[vl->type]->params_count,
	464	vik_layer_interfaces[vl->type]->params_groups,
	465	vik_layer_interfaces[vl->type]->params_groups_count,
	466	(gpointer) vik_layer_interfaces[vl->type]->set_param,
	467	vl,
	468	vp,
	469	(gpointer) vik_layer_interfaces[vl->type]->get_param,
	470	vl) ) {
28c82d8b	471	case 0:
28c82d8b	472	case 3:
730a38c1	473	return FALSE;
28c82d8b EB	474	/* redraw (?) */
28c82d8b EB	475	case 2:
07059501	476	vik_layer_post_read ( vl, vp, FALSE ); /* update any gc's */
28c82d8b EB	477	default:
28c82d8b EB	478	return TRUE;
50a14534 EB	479	}
50a14534 EB	480	}
bce3a7b0	481