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

/*
 * viking -- GPS Data and Topo Analyzer, Explorer, and Manager
 *
 * Copyright (C) 2005, Alex Foobarian <foobarian@gmail.com>
 * Copyright (C) 2003-2007, 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++ )
    {
      g_debug("%s: %s", __FUNCTION__, params[i].name);
      d = get_param(vl, i, FALSE);
      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++ )
    {
      g_debug("%s: %s", __FUNCTION__, params[i].name);
      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, FALSE);
	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, FALSE);
        /* don't free -- string list is responsibility of the layer */

        break;
        }
      default:
	vlm_read(&d);
	set_param(vl, i, d, vvp, FALSE);
	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, gboolean is_file_operation )
{
  if ( vik_layer_interfaces[layer->type]->set_param )
    return vik_layer_interfaces[layer->type]->set_param ( layer, id, data, vp, is_file_operation );
  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 ( _("Layer Properties"),
					    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	*
a482007a GB	4	* Copyright (C) 2005, Alex Foobarian <foobarian@gmail.com>
a482007a GB	5	* Copyright (C) 2003-2007, Evan Battaglia <gtoevan@gmx.net>
50a14534 EB	6	*
	7	* This program is free software; you can redistribute it and/or modify
	8	* it under the terms of the GNU General Public License as published by
	9	* the Free Software Foundation; either version 2 of the License, or
	10	* (at your option) any later version.
	11	*
	12	* This program is distributed in the hope that it will be useful,
	13	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	14	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	15	* GNU General Public License for more details.
	16	*
	17	* You should have received a copy of the GNU General Public License
	18	* along with this program; if not, write to the Free Software
	19	* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
	20	*
	21	*/
	22
4c77d5e0 GB	23	#ifdef HAVE_CONFIG_H
	24	#include "config.h"
	25	#endif
	26
	27	#include <glib/gi18n.h>
	28
50a14534	29	#include "viking.h"
911400b5	30	#include <string.h>
50a14534 EB	31
	32	/* functions common to all layers. */
	33	/* TODO longone: rename interface free -> finalize */
	34
	35	extern VikLayerInterface vik_aggregate_layer_interface;
	36	extern VikLayerInterface vik_trw_layer_interface;
	37	extern VikLayerInterface vik_maps_layer_interface;
	38	extern VikLayerInterface vik_coord_layer_interface;
	39	extern VikLayerInterface vik_georef_layer_interface;
b364d6bc	40	extern VikLayerInterface vik_gps_layer_interface;
ad0a8c2d	41	extern VikLayerInterface vik_dem_layer_interface;
50a14534 EB	42
	43	enum {
	44	VL_UPDATE_SIGNAL,
	45	VL_LAST_SIGNAL
	46	};
	47	static guint layer_signals[VL_LAST_SIGNAL] = { 0 };
	48
	49	static GObjectClass *parent_class;
	50
	51	static void layer_class_init ( VikLayerClass *klass );
	52	static void layer_init ( VikLayer *vl );
	53	static void layer_finalize ( VikLayer *vl );
94933cb8	54	static gboolean layer_properties_factory ( VikLayer vl, VikViewport vp );
50a14534 EB	55
	56
	57	/* TODO longone: rename vik_layer_init -> set_type */
	58
	59	GType vik_layer_get_type ()
	60	{
	61	static GType vl_type = 0;
	62
	63	if (!vl_type)
	64	{
	65	static const GTypeInfo vl_info =
	66	{
	67	sizeof (VikLayerClass),
	68	NULL, /* base_init */
	69	NULL, /* base_finalize */
	70	(GClassInitFunc) layer_class_init, /* class init */
	71	NULL, /* class_finalize */
	72	NULL, /* class_data */
	73	sizeof (VikLayer),
	74	0,
	75	(GInstanceInitFunc) layer_init /* instance init */
	76	};
	77	vl_type = g_type_register_static ( G_TYPE_OBJECT, "VikLayer", &vl_info, 0 );
	78	}
	79
	80	return vl_type;
	81	}
	82
	83	static void layer_class_init (VikLayerClass *klass)
	84	{
	85	GObjectClass *object_class;
	86
	87	object_class = G_OBJECT_CLASS (klass);
	88
	89	object_class->finalize = (GObjectFinalizeFunc) layer_finalize;
	90
	91	parent_class = g_type_class_peek_parent (klass);
	92
	93	layer_signals[VL_UPDATE_SIGNAL] = g_signal_new ( "update", G_TYPE_FROM_CLASS (klass),
	94	G_SIGNAL_RUN_FIRST \| G_SIGNAL_ACTION, G_STRUCT_OFFSET (VikLayerClass, update), NULL, NULL,
	95	g_cclosure_marshal_VOID__VOID, G_TYPE_NONE, 0);
	96	}
	97
	98	void vik_layer_emit_update ( VikLayer *vl )
0df66d57 EB	99	{
0df66d57 EB	100	if ( vl->visible ) {
c9177aae	101	vik_window_set_redraw_trigger(vl);
0df66d57 EB	102	g_signal_emit ( G_OBJECT(vl), layer_signals[VL_UPDATE_SIGNAL], 0 );
	103	}
	104	}
	105
	106	/* should only be done by VikLayersPanel -- need to redraw and record trigger
	107	* when we make a layer invisible.
	108	*/
	109	void vik_layer_emit_update_although_invisible ( VikLayer *vl )
	110	{
c9177aae	111	vik_window_set_redraw_trigger(vl);
0df66d57 EB	112	g_signal_emit ( G_OBJECT(vl), layer_signals[VL_UPDATE_SIGNAL], 0 );
	113	}
	114
0df66d57 EB	115	/* doesn't set the trigger. should be done by aggregate layer when child emits update. */
0df66d57 EB	116	void vik_layer_emit_update_secondary ( VikLayer *vl )
50a14534 EB	117	{
	118	if ( vl->visible )
	119	g_signal_emit ( G_OBJECT(vl), layer_signals[VL_UPDATE_SIGNAL], 0 );
	120	}
	121
	122	static VikLayerInterface *vik_layer_interfaces[VIK_LAYER_NUM_TYPES] = {
	123	&vik_aggregate_layer_interface,
	124	&vik_trw_layer_interface,
	125	&vik_coord_layer_interface,
	126	&vik_georef_layer_interface,
b364d6bc	127	&vik_gps_layer_interface,
50a14534	128	&vik_maps_layer_interface,
ad0a8c2d	129	&vik_dem_layer_interface,
50a14534 EB	130	};
	131
	132	VikLayerInterface *vik_layer_get_interface ( gint type )
	133	{
	134	g_assert ( type < VIK_LAYER_NUM_TYPES );
	135	return vik_layer_interfaces[type];
	136	}
	137
	138	static void layer_init ( VikLayer *vl )
	139	{
	140	vl->visible = TRUE;
	141	vl->name = NULL;
	142	vl->realized = FALSE;
	143	}
	144
	145	void vik_layer_init ( VikLayer *vl, gint type )
	146	{
	147	vl->type = type;
	148	}
	149
	150	/* frees old name */
	151	void vik_layer_rename ( VikLayer l, const gchar new_name )
	152	{
92558066 GB	153	g_assert ( l != NULL );
	154	g_assert ( new_name != NULL );
	155	g_free ( l->name );
50a14534 EB	156	l->name = g_strdup ( new_name );
	157	}
	158
	159	void vik_layer_rename_no_copy ( VikLayer l, gchar new_name )
	160	{
92558066 GB	161	g_assert ( l != NULL );
	162	g_assert ( new_name != NULL );
	163	g_free ( l->name );
50a14534 EB	164	l->name = new_name;
	165	}
	166
92558066 GB	167	const gchar vik_layer_get_name ( VikLayer l )
	168	{
	169	g_assert ( l != NULL);
	170	return l->name;
	171	}
	172
50a14534 EB	173	VikLayer vik_layer_create ( gint type, gpointer vp, GtkWindow w, gboolean interactive )
	174	{
	175	VikLayer *new_layer = NULL;
	176	g_assert ( type < VIK_LAYER_NUM_TYPES );
	177
	178	new_layer = vik_layer_interfaces[type]->create ( vp );
	179
	180	g_assert ( new_layer != NULL );
	181
	182	if ( interactive )
	183	{
	184	if ( vik_layer_properties ( new_layer, vp ) )
4c77d5e0 GB	185	/* We translate the name here */
	186	/* in order to avoid translating name set by user */
	187	vik_layer_rename ( VIK_LAYER(new_layer), _(vik_layer_interfaces[type]->name) );
50a14534 EB	188	else
	189	{
	190	g_object_unref ( G_OBJECT(new_layer) ); /* cancel that */
	191	new_layer = NULL;
	192	}
	193	}
	194	return new_layer;
	195	}
	196
	197	/* returns TRUE if OK was pressed */
	198	gboolean vik_layer_properties ( VikLayer *layer, gpointer vp )
	199	{
	200	if ( vik_layer_interfaces[layer->type]->properties )
	201	return vik_layer_interfaces[layer->type]->properties ( layer, vp );
	202	return layer_properties_factory ( layer, vp );
	203	}
	204
	205	void vik_layer_draw ( VikLayer *l, gpointer data )
	206	{
	207	if ( l->visible )
	208	if ( vik_layer_interfaces[l->type]->draw )
	209	vik_layer_interfaces[l->type]->draw ( l, data );
	210	}
	211
	212	void vik_layer_change_coord_mode ( VikLayer *l, VikCoordMode mode )
	213	{
	214	if ( vik_layer_interfaces[l->type]->change_coord_mode )
	215	vik_layer_interfaces[l->type]->change_coord_mode ( l, mode );
	216	}
	217
911400b5 AF	218	typedef struct {
	219	gint layer_type;
	220	gint len;
	221	guint8 data[0];
	222	} header_t;
	223
	224	void vik_layer_marshall ( VikLayer vl, guint8 data, gint len )
	225	{
	226	header_t *header;
	227	if ( vl && vik_layer_interfaces[vl->type]->marshall ) {
	228	vik_layer_interfaces[vl->type]->marshall ( vl, data, len );
	229	if (*data) {
	230	header = g_malloc(len + sizeof(header));
	231	header->layer_type = vl->type;
	232	header->len = *len;
	233	memcpy(header->data, data, len);
	234	g_free(*data);
	235	data = (guint8 )header;
	236	len = len + sizeof(*header);
	237	}
	238	} else {
	239	*data = NULL;
	240	}
	241	}
	242
	243	void vik_layer_marshall_params ( VikLayer vl, guint8 data, gint datalen )
	244	{
	245	VikLayerParam *params = vik_layer_get_interface(vl->type)->params;
	246	VikLayerFuncGetParam get_param = vik_layer_get_interface(vl->type)->get_param;
	247	GByteArray* b = g_byte_array_new ();
	248	gint len;
	249
	250	#define vlm_append(obj, sz) \
	251	len = (sz); \
	252	g_byte_array_append ( b, (guint8 *)&len, sizeof(len) ); \
	253	g_byte_array_append ( b, (guint8 *)(obj), len );
	254
	255	vlm_append(vl->name, strlen(vl->name));
	256
	257	if ( params && get_param )
	258	{
	259	VikLayerParamData d;
	260	guint16 i, params_count = vik_layer_get_interface(vl->type)->params_count;
	261	for ( i = 0; i < params_count; i++ )
	262	{
ce37ab9b	263	g_debug("%s: %s", __FUNCTION__, params[i].name);
158b3642	264	d = get_param(vl, i, FALSE);
911400b5 AF	265	switch ( params[i].type )
	266	{
	267	case VIK_LAYER_PARAM_STRING:
	268	vlm_append(d.s, strlen(d.s));
	269	break;
fa86f1c0 EB	270
	271	/* print out the string list in the array */
	272	case VIK_LAYER_PARAM_STRING_LIST: {
	273	GList *list = d.sl;
	274
	275	/* write length of list (# of strings) */
	276	gint listlen = g_list_length ( list );
	277	g_byte_array_append ( b, (guint8 *)&listlen, sizeof(listlen) );
	278
	279	/* write each string */
	280	while ( list ) {
	281	gchar s = (gchar ) list->data;
	282	vlm_append(s, strlen(s));
	283	list = list->next;
	284	}
	285
	286	break;
	287	}
911400b5 AF	288	default:
	289	vlm_append(&d, sizeof(d));
	290	break;
	291	}
	292	}
	293	}
	294
	295	*data = b->data;
	296	*datalen = b->len;
	297	g_byte_array_free ( b, FALSE );
	298
	299	#undef vlm_append
	300	}
	301
	302	void vik_layer_unmarshall_params ( VikLayer vl, guint8 data, gint datalen, VikViewport *vvp )
	303	{
	304	VikLayerParam *params = vik_layer_get_interface(vl->type)->params;
	305	VikLayerFuncSetParam set_param = vik_layer_get_interface(vl->type)->set_param;
	306	gchar *s;
	307	guint8 b = (guint8 )data;
	308
	309	#define vlm_size ((gint )b)
	310	#define vlm_read(obj) \
	311	memcpy((obj), b+sizeof(gint), vlm_size); \
	312	b += sizeof(gint) + vlm_size;
	313
	314	s = g_malloc(vlm_size + 1);
	315	s[vlm_size]=0;
	316	vlm_read(s);
	317
	318	vik_layer_rename(vl, s);
	319
	320	g_free(s);
	321
	322	if ( params && set_param )
	323	{
	324	VikLayerParamData d;
	325	guint16 i, params_count = vik_layer_get_interface(vl->type)->params_count;
	326	for ( i = 0; i < params_count; i++ )
	327	{
ce37ab9b	328	g_debug("%s: %s", __FUNCTION__, params[i].name);
911400b5 AF	329	switch ( params[i].type )
	330	{
	331	case VIK_LAYER_PARAM_STRING:
	332	s = g_malloc(vlm_size + 1);
	333	s[vlm_size]=0;
	334	vlm_read(s);
	335	d.s = s;
158b3642	336	set_param(vl, i, d, vvp, FALSE);
911400b5 AF	337	g_free(s);
911400b5 AF	338	break;
fa86f1c0 EB	339	case VIK_LAYER_PARAM_STRING_LIST: {
	340	gint listlen = vlm_size, j;
	341	GList *list = NULL;
	342	b += sizeof(gint); /* skip listlen */;
	343
	344	for ( j = 0; j < listlen; j++ ) {
	345	/* get a string */
	346	s = g_malloc(vlm_size + 1);
	347	s[vlm_size]=0;
	348	vlm_read(s);
	349	list = g_list_append ( list, s );
	350	}
	351	d.sl = list;
158b3642	352	set_param(vl, i, d, vvp, FALSE);
fa86f1c0 EB	353	/* don't free -- string list is responsibility of the layer */
	354
	355	break;
	356	}
911400b5 AF	357	default:
911400b5 AF	358	vlm_read(&d);
158b3642	359	set_param(vl, i, d, vvp, FALSE);
911400b5 AF	360	break;
	361	}
	362	}
	363	}
	364	}
	365
	366	VikLayer vik_layer_unmarshall ( guint8 data, gint len, VikViewport *vvp )
	367	{
	368	header_t *header;
	369
	370	header = (header_t *)data;
	371
	372	if ( vik_layer_interfaces[header->layer_type]->unmarshall ) {
	373	return vik_layer_interfaces[header->layer_type]->unmarshall ( header->data, header->len, vvp );
	374	} else {
	375	return NULL;
	376	}
	377	}
50a14534 EB	378
	379	static void layer_finalize ( VikLayer *vl )
	380	{
	381	g_assert ( vl != NULL );
	382	if ( vik_layer_interfaces[vl->type]->free )
	383	vik_layer_interfaces[vl->type]->free ( vl );
	384	if ( vl->name )
	385	g_free ( vl->name );
	386	G_OBJECT_CLASS(parent_class)->finalize(G_OBJECT(vl));
	387	}
	388
	389	/* sublayer switching */
	390	gboolean vik_layer_sublayer_toggle_visible ( VikLayer *l, gint subtype, gpointer sublayer )
	391	{
	392	if ( vik_layer_interfaces[l->type]->sublayer_toggle_visible )
	393	return vik_layer_interfaces[l->type]->sublayer_toggle_visible ( l, subtype, sublayer );
	394	return TRUE; /* if unknown, will always be visible */
	395	}
	396
	397	void vik_layer_realize ( VikLayer l, VikTreeview vt, GtkTreeIter *layer_iter )
	398	{
	399	l->vt = vt;
	400	l->iter = *layer_iter;
	401	l->realized = TRUE;
	402	if ( vik_layer_interfaces[l->type]->realize )
	403	vik_layer_interfaces[l->type]->realize ( l, vt, layer_iter );
	404	}
	405
20c7a3a0 QT	406	void vik_layer_set_menu_items_selection(VikLayer *l, guint16 selection)
	407	{
	408	if ( vik_layer_interfaces[l->type]->set_menu_selection )
	409	vik_layer_interfaces[l->type]->set_menu_selection ( l, selection );
	410	}
	411
	412	guint16 vik_layer_get_menu_items_selection(VikLayer *l)
	413	{
	414	if ( vik_layer_interfaces[l->type]->get_menu_selection )
	415	return(vik_layer_interfaces[l->type]->get_menu_selection (l));
	416	else
	417	return(vik_layer_interfaces[l->type]->menu_items_selection);
	418	}
	419
50a14534 EB	420	void vik_layer_add_menu_items ( VikLayer l, GtkMenu menu, gpointer vlp )
	421	{
	422	if ( vik_layer_interfaces[l->type]->add_menu_items )
	423	vik_layer_interfaces[l->type]->add_menu_items ( l, menu, vlp );
	424	}
	425
	426	gboolean vik_layer_sublayer_add_menu_items ( VikLayer l, GtkMenu menu, gpointer vlp, gint subtype, gpointer sublayer, GtkTreeIter *iter )
	427	{
	428	if ( vik_layer_interfaces[l->type]->sublayer_add_menu_items )
	429	return vik_layer_interfaces[l->type]->sublayer_add_menu_items ( l, menu, vlp, subtype, sublayer, iter );
	430	return FALSE;
	431	}
	432
	433
	434	const gchar vik_layer_sublayer_rename_request ( VikLayer l, const gchar newname, gpointer vlp, gint subtype, gpointer sublayer, GtkTreeIter iter )
	435	{
	436	if ( vik_layer_interfaces[l->type]->sublayer_rename_request )
	437	return vik_layer_interfaces[l->type]->sublayer_rename_request ( l, newname, vlp, subtype, sublayer, iter );
	438	return NULL;
	439	}
	440
	441	GdkPixbuf *vik_layer_load_icon ( gint type )
	442	{
	443	g_assert ( type < VIK_LAYER_NUM_TYPES );
	444	if ( vik_layer_interfaces[type]->icon )
	445	return gdk_pixbuf_from_pixdata ( vik_layer_interfaces[type]->icon, FALSE, NULL );
	446	return NULL;
	447	}
	448
158b3642	449	gboolean vik_layer_set_param ( VikLayer *layer, guint16 id, VikLayerParamData data, gpointer vp, gboolean is_file_operation )
50a14534 EB	450	{
50a14534 EB	451	if ( vik_layer_interfaces[layer->type]->set_param )
158b3642	452	return vik_layer_interfaces[layer->type]->set_param ( layer, id, data, vp, is_file_operation );
50a14534 EB	453	return FALSE;
	454	}
	455
07059501	456	void vik_layer_post_read ( VikLayer layer, VikViewport vp, gboolean from_file )
50a14534 EB	457	{
50a14534 EB	458	if ( vik_layer_interfaces[layer->type]->post_read )
07059501	459	vik_layer_interfaces[layer->type]->post_read ( layer, vp, from_file );
50a14534 EB	460	}
50a14534 EB	461
94933cb8	462	static gboolean layer_properties_factory ( VikLayer vl, VikViewport vp )
50a14534	463	{
13fde155 RN	464	switch ( a_uibuilder_properties_factory ( _("Layer Properties"),
13fde155 RN	465	VIK_GTK_WINDOW_FROM_WIDGET(vp),
dc2c040e RN	466	vik_layer_interfaces[vl->type]->params,
	467	vik_layer_interfaces[vl->type]->params_count,
	468	vik_layer_interfaces[vl->type]->params_groups,
	469	vik_layer_interfaces[vl->type]->params_groups_count,
	470	(gpointer) vik_layer_interfaces[vl->type]->set_param,
	471	vl,
	472	vp,
	473	(gpointer) vik_layer_interfaces[vl->type]->get_param,
	474	vl) ) {
28c82d8b	475	case 0:
28c82d8b	476	case 3:
730a38c1	477	return FALSE;
28c82d8b EB	478	/* redraw (?) */
28c82d8b EB	479	case 2:
07059501	480	vik_layer_post_read ( vl, vp, FALSE ); /* update any gc's */
28c82d8b EB	481	default:
28c82d8b EB	482	return TRUE;
50a14534 EB	483	}
50a14534 EB	484	}
bce3a7b0	485