2 * viking -- GPS Data and Topo Analyzer, Explorer, and Manager
4 * Copyright (C) 2003-2005, Evan Battaglia <gtoevan@gmx.net>
5 * Copyright (C) 2012, Guilhem Bonnefille <guilhem.bonnefille@gmail.com>
6 * Copyright (C) 2012-2013, Rob Norris <rw_norris@hotmail.com>
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
33 #include "gpsmapper.h"
42 #include <glib/gstdio.h>
43 #include <glib/gi18n.h>
46 #include "misc/strtod.h"
48 #define TEST_BOOLEAN(str) (! ((str)[0] == '\0' || (str)[0] == '0' || (str)[0] == 'n' || (str)[0] == 'N' || (str)[0] == 'f' || (str)[0] == 'F') )
49 #define VIK_MAGIC "#VIK"
50 #define GPX_MAGIC "<?xm"
51 #define VIK_MAGIC_LEN 4
52 #define GPX_MAGIC_LEN 4
54 #define VIKING_FILE_VERSION 1
56 typedef struct _Stack Stack;
63 static void pop(Stack **stack) {
64 Stack *tmp = (*stack)->under;
69 static void push(Stack **stack)
71 Stack *tmp = g_malloc ( sizeof ( Stack ) );
76 static gboolean check_magic ( FILE *f, const gchar *magic_number, guint magic_length )
78 gchar magic[magic_length];
81 if ( fread(magic, 1, sizeof(magic), f) == sizeof(magic) &&
82 strncmp(magic, magic_number, sizeof(magic)) == 0 )
84 for ( i = sizeof(magic)-1; i >= 0; i-- ) /* the ol' pushback */
90 static gboolean str_starts_with ( const gchar *haystack, const gchar *needle, guint16 len_needle, gboolean must_be_longer )
92 if ( strlen(haystack) > len_needle - (!must_be_longer) && strncasecmp ( haystack, needle, len_needle ) == 0 )
97 void file_write_layer_param ( FILE *f, const gchar *name, VikLayerParamType type, VikLayerParamData data ) {
98 /* string lists are handled differently. We get a GList (that shouldn't
99 * be freed) back for get_param and if it is null we shouldn't write
100 * anything at all (otherwise we'd read in a list with an empty string,
101 * not an empty string list.
103 if ( type == VIK_LAYER_PARAM_STRING_LIST ) {
105 GList *iter = (GList *)data.sl;
107 fprintf ( f, "%s=", name );
108 fprintf ( f, "%s\n", (gchar *)(iter->data) );
113 fprintf ( f, "%s=", name );
116 case VIK_LAYER_PARAM_DOUBLE: {
117 // char buf[15]; /* locale independent */
118 // fprintf ( f, "%s\n", (char *) g_dtostr (data.d, buf, sizeof (buf)) ); break;
119 fprintf ( f, "%f\n", data.d );
122 case VIK_LAYER_PARAM_UINT: fprintf ( f, "%d\n", data.u ); break;
123 case VIK_LAYER_PARAM_INT: fprintf ( f, "%d\n", data.i ); break;
124 case VIK_LAYER_PARAM_BOOLEAN: fprintf ( f, "%c\n", data.b ? 't' : 'f' ); break;
125 case VIK_LAYER_PARAM_STRING: fprintf ( f, "%s\n", data.s ? data.s : "" ); break;
126 case VIK_LAYER_PARAM_COLOR: fprintf ( f, "#%.2x%.2x%.2x\n", (int)(data.c.red/256),(int)(data.c.green/256),(int)(data.c.blue/256)); break;
132 static void write_layer_params_and_data ( VikLayer *l, FILE *f )
134 VikLayerParam *params = vik_layer_get_interface(l->type)->params;
135 VikLayerFuncGetParam get_param = vik_layer_get_interface(l->type)->get_param;
137 fprintf ( f, "name=%s\n", l->name ? l->name : "" );
139 fprintf ( f, "visible=f\n" );
141 if ( params && get_param )
143 VikLayerParamData data;
144 guint16 i, params_count = vik_layer_get_interface(l->type)->params_count;
145 for ( i = 0; i < params_count; i++ )
147 data = get_param(l, i, TRUE);
148 file_write_layer_param(f, params[i].name, params[i].type, data);
151 if ( vik_layer_get_interface(l->type)->write_file_data )
153 fprintf ( f, "\n\n~LayerData\n" );
154 vik_layer_get_interface(l->type)->write_file_data ( l, f );
155 fprintf ( f, "~EndLayerData\n" );
158 write param, and get_value, etc.
159 then run layer data, and that's it.
163 static void file_write ( VikAggregateLayer *top, FILE *f, gpointer vp )
166 VikLayer *current_layer;
168 VikViewportDrawMode mode;
169 gchar *modestring = NULL;
172 stack->data = (gpointer) vik_aggregate_layer_get_children(VIK_AGGREGATE_LAYER(top));
176 vik_coord_to_latlon ( vik_viewport_get_center ( VIK_VIEWPORT(vp) ), &ll );
178 mode = vik_viewport_get_drawmode ( VIK_VIEWPORT(vp) );
180 case VIK_VIEWPORT_DRAWMODE_UTM: modestring = "utm"; break;
181 case VIK_VIEWPORT_DRAWMODE_EXPEDIA: modestring = "expedia"; break;
182 case VIK_VIEWPORT_DRAWMODE_MERCATOR: modestring = "mercator"; break;
183 case VIK_VIEWPORT_DRAWMODE_LATLON: modestring = "latlon"; break;
185 g_critical("Houston, we've had a problem. mode=%d", mode);
188 fprintf ( f, "#VIKING GPS Data file " VIKING_URL "\n" );
189 fprintf ( f, "FILE_VERSION=%d\n", VIKING_FILE_VERSION );
190 fprintf ( f, "\nxmpp=%f\nympp=%f\nlat=%f\nlon=%f\nmode=%s\ncolor=%s\nhighlightcolor=%s\ndrawscale=%s\ndrawcentermark=%s\ndrawhighlight=%s\n",
191 vik_viewport_get_xmpp ( VIK_VIEWPORT(vp) ), vik_viewport_get_ympp ( VIK_VIEWPORT(vp) ), ll.lat, ll.lon,
192 modestring, vik_viewport_get_background_color(VIK_VIEWPORT(vp)),
193 vik_viewport_get_highlight_color(VIK_VIEWPORT(vp)),
194 vik_viewport_get_draw_scale(VIK_VIEWPORT(vp)) ? "t" : "f",
195 vik_viewport_get_draw_centermark(VIK_VIEWPORT(vp)) ? "t" : "f",
196 vik_viewport_get_draw_highlight(VIK_VIEWPORT(vp)) ? "t" : "f" );
198 if ( ! VIK_LAYER(top)->visible )
199 fprintf ( f, "visible=f\n" );
201 while (stack && stack->data)
203 current_layer = VIK_LAYER(((GList *)stack->data)->data);
204 fprintf ( f, "\n~Layer %s\n", vik_layer_get_interface(current_layer->type)->fixed_layer_name );
205 write_layer_params_and_data ( current_layer, f );
206 if ( current_layer->type == VIK_LAYER_AGGREGATE && !vik_aggregate_layer_is_empty(VIK_AGGREGATE_LAYER(current_layer)) )
209 stack->data = (gpointer) vik_aggregate_layer_get_children(VIK_AGGREGATE_LAYER(current_layer));
211 else if ( current_layer->type == VIK_LAYER_GPS && !vik_gps_layer_is_empty(VIK_GPS_LAYER(current_layer)) )
214 stack->data = (gpointer) vik_gps_layer_get_children(VIK_GPS_LAYER(current_layer));
218 stack->data = (gpointer) ((GList *)stack->data)->next;
219 fprintf ( f, "~EndLayer\n\n" );
220 while ( stack && (!stack->data) )
225 stack->data = (gpointer) ((GList *)stack->data)->next;
226 fprintf ( f, "~EndLayer\n\n" );
232 get vikaggregatelayer's children (?)
233 foreach write ALL params,
234 then layer data (IF function exists)
238 stack of layers (LIST) we are working on
239 when layer->next == NULL ...
244 static void string_list_delete ( gpointer key, gpointer l, gpointer user_data )
246 /* 20071021 bugfix */
247 GList *iter = (GList *) l;
249 g_free ( iter->data );
252 g_list_free ( (GList *) l );
255 static void string_list_set_param (gint i, GList *list, gpointer *layer_and_vp)
257 VikLayerSetParam vlsp;
260 vlsp.vp = layer_and_vp[1];
261 vlsp.is_file_operation = TRUE;
262 vlsp.dirpath = (const gchar*)layer_and_vp[2];
264 vik_layer_set_param ( VIK_LAYER(layer_and_vp[0]), &vlsp );
268 * Read in a Viking file and return how successful the parsing was
269 * ATM this will always work, in that even if there are parsing problems
270 * then there will be no new values to override the defaults
272 * TODO flow up line number(s) / error messages of problems encountered...
275 static gboolean file_read ( VikAggregateLayer *top, FILE *f, const gchar *dirpath, VikViewport *vp )
278 struct LatLon ll = { 0.0, 0.0 };
284 VikLayerParam *params = NULL; /* for current layer, so we don't have to keep on looking up interface */
285 guint8 params_count = 0;
287 GHashTable *string_lists = g_hash_table_new(g_direct_hash,g_direct_equal);
289 gboolean successful_read = TRUE;
293 stack->data = (gpointer) top;
295 while ( fgets ( buffer, 4096, f ) )
300 while ( *line == ' ' || *line =='\t' )
303 if ( line[0] == '#' )
308 if ( len > 0 && line[len-1] == '\n' )
310 if ( len > 0 && line[len-1] == '\r' )
317 if ( line[0] == '~' )
322 else if ( str_starts_with ( line, "Layer ", 6, TRUE ) )
324 int parent_type = VIK_LAYER(stack->data)->type;
325 if ( ( ! stack->data ) || ((parent_type != VIK_LAYER_AGGREGATE) && (parent_type != VIK_LAYER_GPS)) )
327 successful_read = FALSE;
328 g_warning ( "Line %ld: Layer command inside non-Aggregate Layer (type %d)", line_num, parent_type );
329 push(&stack); /* inside INVALID layer */
335 VikLayerTypeEnum type = vik_layer_type_from_string ( line+6 );
337 if ( type == VIK_LAYER_NUM_TYPES )
339 successful_read = FALSE;
340 g_warning ( "Line %ld: Unknown type %s", line_num, line+6 );
343 else if (parent_type == VIK_LAYER_GPS)
345 stack->data = (gpointer) vik_gps_layer_get_a_child(VIK_GPS_LAYER(stack->under->data));
346 params = vik_layer_get_interface(type)->params;
347 params_count = vik_layer_get_interface(type)->params_count;
351 stack->data = (gpointer) vik_layer_create ( type, vp, FALSE );
352 params = vik_layer_get_interface(type)->params;
353 params_count = vik_layer_get_interface(type)->params_count;
357 else if ( str_starts_with ( line, "EndLayer", 8, FALSE ) )
359 if ( stack->under == NULL ) {
360 successful_read = FALSE;
361 g_warning ( "Line %ld: Mismatched ~EndLayer command", line_num );
365 /* add any string lists we've accumulated */
366 gpointer layer_and_vp[3];
367 layer_and_vp[0] = stack->data;
368 layer_and_vp[1] = vp;
369 layer_and_vp[2] = (gpointer)dirpath;
370 g_hash_table_foreach ( string_lists, (GHFunc) string_list_set_param, layer_and_vp );
371 g_hash_table_remove_all ( string_lists );
373 if ( stack->data && stack->under->data )
375 if (VIK_LAYER(stack->under->data)->type == VIK_LAYER_AGGREGATE) {
376 vik_aggregate_layer_add_layer ( VIK_AGGREGATE_LAYER(stack->under->data), VIK_LAYER(stack->data), FALSE );
377 vik_layer_post_read ( VIK_LAYER(stack->data), vp, TRUE );
379 else if (VIK_LAYER(stack->under->data)->type == VIK_LAYER_GPS) {
380 /* TODO: anything else needs to be done here ? */
383 successful_read = FALSE;
384 g_warning ( "Line %ld: EndLayer command inside non-Aggregate Layer (type %d)", line_num, VIK_LAYER(stack->data)->type );
390 else if ( str_starts_with ( line, "LayerData", 9, FALSE ) )
392 if ( stack->data && vik_layer_get_interface(VIK_LAYER(stack->data)->type)->read_file_data )
394 /* must read until hits ~EndLayerData */
395 if ( ! vik_layer_get_interface(VIK_LAYER(stack->data)->type)->read_file_data ( VIK_LAYER(stack->data), f, dirpath ) )
396 successful_read = FALSE;
399 { /* simply skip layer data over */
400 while ( fgets ( buffer, 4096, f ) )
407 if ( len > 0 && line[len-1] == '\n' )
409 if ( len > 0 && line[len-1] == '\r' )
411 if ( strcasecmp ( line, "~EndLayerData" ) == 0 )
419 successful_read = FALSE;
420 g_warning ( "Line %ld: Unknown tilde command", line_num );
430 for ( i = 0; i < len; i++ )
431 if ( line[i] == '=' )
434 if ( stack->under == NULL && eq_pos == 12 && strncasecmp ( line, "FILE_VERSION", eq_pos ) == 0) {
435 gint version = strtol(line+13, NULL, 10);
436 g_debug ( "%s: reading file version %d", __FUNCTION__, version );
437 if ( version > VIKING_FILE_VERSION )
438 successful_read = FALSE;
439 // However we'll still carry and attempt to read whatever we can
441 else if ( stack->under == NULL && eq_pos == 4 && strncasecmp ( line, "xmpp", eq_pos ) == 0) /* "hard coded" params: global & for all layer-types */
442 vik_viewport_set_xmpp ( VIK_VIEWPORT(vp), strtod_i8n ( line+5, NULL ) );
443 else if ( stack->under == NULL && eq_pos == 4 && strncasecmp ( line, "ympp", eq_pos ) == 0)
444 vik_viewport_set_ympp ( VIK_VIEWPORT(vp), strtod_i8n ( line+5, NULL ) );
445 else if ( stack->under == NULL && eq_pos == 3 && strncasecmp ( line, "lat", eq_pos ) == 0 )
446 ll.lat = strtod_i8n ( line+4, NULL );
447 else if ( stack->under == NULL && eq_pos == 3 && strncasecmp ( line, "lon", eq_pos ) == 0 )
448 ll.lon = strtod_i8n ( line+4, NULL );
449 else if ( stack->under == NULL && eq_pos == 4 && strncasecmp ( line, "mode", eq_pos ) == 0 && strcasecmp ( line+5, "utm" ) == 0)
450 vik_viewport_set_drawmode ( VIK_VIEWPORT(vp), VIK_VIEWPORT_DRAWMODE_UTM);
451 else if ( stack->under == NULL && eq_pos == 4 && strncasecmp ( line, "mode", eq_pos ) == 0 && strcasecmp ( line+5, "expedia" ) == 0)
452 vik_viewport_set_drawmode ( VIK_VIEWPORT(vp), VIK_VIEWPORT_DRAWMODE_EXPEDIA );
453 else if ( stack->under == NULL && eq_pos == 4 && strncasecmp ( line, "mode", eq_pos ) == 0 && strcasecmp ( line+5, "google" ) == 0)
455 successful_read = FALSE;
456 g_warning ( _("Draw mode '%s' no more supported"), "google" );
458 else if ( stack->under == NULL && eq_pos == 4 && strncasecmp ( line, "mode", eq_pos ) == 0 && strcasecmp ( line+5, "kh" ) == 0)
460 successful_read = FALSE;
461 g_warning ( _("Draw mode '%s' no more supported"), "kh" );
463 else if ( stack->under == NULL && eq_pos == 4 && strncasecmp ( line, "mode", eq_pos ) == 0 && strcasecmp ( line+5, "mercator" ) == 0)
464 vik_viewport_set_drawmode ( VIK_VIEWPORT(vp), VIK_VIEWPORT_DRAWMODE_MERCATOR );
465 else if ( stack->under == NULL && eq_pos == 4 && strncasecmp ( line, "mode", eq_pos ) == 0 && strcasecmp ( line+5, "latlon" ) == 0)
466 vik_viewport_set_drawmode ( VIK_VIEWPORT(vp), VIK_VIEWPORT_DRAWMODE_LATLON );
467 else if ( stack->under == NULL && eq_pos == 5 && strncasecmp ( line, "color", eq_pos ) == 0 )
468 vik_viewport_set_background_color ( VIK_VIEWPORT(vp), line+6 );
469 else if ( stack->under == NULL && eq_pos == 14 && strncasecmp ( line, "highlightcolor", eq_pos ) == 0 )
470 vik_viewport_set_highlight_color ( VIK_VIEWPORT(vp), line+15 );
471 else if ( stack->under == NULL && eq_pos == 9 && strncasecmp ( line, "drawscale", eq_pos ) == 0 )
472 vik_viewport_set_draw_scale ( VIK_VIEWPORT(vp), TEST_BOOLEAN(line+10) );
473 else if ( stack->under == NULL && eq_pos == 14 && strncasecmp ( line, "drawcentermark", eq_pos ) == 0 )
474 vik_viewport_set_draw_centermark ( VIK_VIEWPORT(vp), TEST_BOOLEAN(line+15) );
475 else if ( stack->under == NULL && eq_pos == 13 && strncasecmp ( line, "drawhighlight", eq_pos ) == 0 )
476 vik_viewport_set_draw_highlight ( VIK_VIEWPORT(vp), TEST_BOOLEAN(line+14) );
477 else if ( stack->under && eq_pos == 4 && strncasecmp ( line, "name", eq_pos ) == 0 )
478 vik_layer_rename ( VIK_LAYER(stack->data), line+5 );
479 else if ( eq_pos == 7 && strncasecmp ( line, "visible", eq_pos ) == 0 )
480 VIK_LAYER(stack->data)->visible = TEST_BOOLEAN(line+8);
481 else if ( eq_pos != -1 && stack->under )
483 gboolean found_match = FALSE;
485 /* go thru layer params. if len == eq_pos && starts_with jazz, set it. */
486 /* also got to check for name and visible. */
490 successful_read = FALSE;
491 g_warning ( "Line %ld: No options for this kind of layer", line_num );
495 for ( i = 0; i < params_count; i++ )
496 if ( strlen(params[i].name) == eq_pos && strncasecmp ( line, params[i].name, eq_pos ) == 0 )
500 if ( params[i].type == VIK_LAYER_PARAM_STRING_LIST ) {
501 GList *l = g_list_append ( g_hash_table_lookup ( string_lists, GINT_TO_POINTER ((gint) i) ),
503 g_hash_table_replace ( string_lists, GINT_TO_POINTER ((gint)i), l );
504 /* add the value to a list, possibly making a new list.
505 * this will be passed to the layer when we read an ~EndLayer */
507 switch ( params[i].type )
509 case VIK_LAYER_PARAM_DOUBLE: x.d = strtod_i8n(line, NULL); break;
510 case VIK_LAYER_PARAM_UINT: x.u = strtoul(line, NULL, 10); break;
511 case VIK_LAYER_PARAM_INT: x.i = strtol(line, NULL, 10); break;
512 case VIK_LAYER_PARAM_BOOLEAN: x.b = TEST_BOOLEAN(line); break;
513 case VIK_LAYER_PARAM_COLOR: memset(&(x.c), 0, sizeof(x.c)); /* default: black */
514 gdk_color_parse ( line, &(x.c) ); break;
515 /* STRING or STRING_LIST -- if STRING_LIST, just set param to add a STRING */
519 VikLayerSetParam vlsp;
523 vlsp.is_file_operation = TRUE;
524 vlsp.dirpath = dirpath;
525 vik_layer_set_param ( VIK_LAYER(stack->data), &vlsp );
530 if ( ! found_match ) {
531 // ATM don't flow up this issue because at least one internal parameter has changed from version 1.3
532 // and don't what to worry users about raising such issues
533 // TODO Maybe hold old values here - compare the line value against them and if a match
534 // generate a different style of message in the GUI...
535 // successful_read = FALSE;
536 g_warning ( "Line %ld: Unknown parameter. Line:\n%s", line_num, line );
540 successful_read = FALSE;
541 g_warning ( "Line %ld: Invalid parameter or parameter outside of layer.", line_num );
555 if ( stack->under && stack->under->data && stack->data )
557 vik_aggregate_layer_add_layer ( VIK_AGGREGATE_LAYER(stack->under->data), VIK_LAYER(stack->data), FALSE );
558 vik_layer_post_read ( VIK_LAYER(stack->data), vp, TRUE );
563 if ( ll.lat != 0.0 || ll.lon != 0.0 )
564 vik_viewport_set_center_latlon ( VIK_VIEWPORT(vp), &ll, TRUE );
566 if ( ( ! VIK_LAYER(top)->visible ) && VIK_LAYER(top)->realized )
567 vik_treeview_item_set_visible ( VIK_LAYER(top)->vt, &(VIK_LAYER(top)->iter), FALSE );
569 /* delete anything we've forgotten about -- should only happen when file ends before an EndLayer */
570 g_hash_table_foreach ( string_lists, string_list_delete, NULL );
571 g_hash_table_destroy ( string_lists );
573 return successful_read;
580 new default layer of type (str_to_type) (check interface->name)
582 VikLayer *vl = stack->data;
584 vik_aggregate_layer_add_layer(stack->data, vl);
586 vik_layer_data ( VIK_LAYER_DATA(stack->data), f, vp );
590 /* ---------------------------------------------------- */
592 static FILE *xfopen ( const char *fn )
594 if ( strcmp(fn,"-") == 0 )
597 return g_fopen(fn, "r");
600 static void xfclose ( FILE *f )
602 if ( f != stdin && f != stdout ) {
609 * Function to determine if a filename is a 'viking' type file
611 gboolean check_file_magic_vik ( const gchar *filename )
613 gboolean result = FALSE;
614 FILE *ff = xfopen ( filename );
616 result = check_magic ( ff, VIK_MAGIC, VIK_MAGIC_LEN );
625 * Append a file extension, if not already present.
627 * Returns: a newly allocated string
629 gchar *append_file_ext ( const gchar *filename, VikFileType_t type )
631 gchar *new_name = NULL;
632 const gchar *ext = NULL;
634 /* Select an extension */
643 case FILE_TYPE_GEOJSON:
646 case FILE_TYPE_GPSMAPPER:
647 case FILE_TYPE_GPSPOINT:
649 /* Do nothing, ext already set to NULL */
654 if ( ext != NULL && ! a_file_check_ext ( filename, ext ) )
655 new_name = g_strconcat ( filename, ext, NULL );
657 /* Simply duplicate */
658 new_name = g_strdup ( filename );
663 VikLoadType_t a_file_load ( VikAggregateLayer *top, VikViewport *vp, VikTrwLayer *vtl, const gchar *filename_or_uri )
665 g_return_val_if_fail ( vp != NULL, LOAD_TYPE_READ_FAILURE );
667 char *filename = (char *)filename_or_uri;
668 if (strncmp(filename, "file://", 7) == 0) {
669 // Consider replacing this with:
670 // filename = g_filename_from_uri ( entry, NULL, NULL );
671 // Since this doesn't support URIs properly (i.e. will failure if is it has %20 characters in it)
672 filename = filename + 7;
673 g_debug ( "Loading file %s from URI %s", filename, filename_or_uri );
675 FILE *f = xfopen ( filename );
678 return LOAD_TYPE_READ_FAILURE;
680 VikLoadType_t load_answer = LOAD_TYPE_OTHER_SUCCESS;
682 gchar *dirpath = g_path_get_dirname ( filename );
683 // Attempt loading the primary file type first - our internal .vik file:
684 if ( check_magic ( f, VIK_MAGIC, VIK_MAGIC_LEN ) )
686 if ( file_read ( top, f, dirpath, vp ) )
687 load_answer = LOAD_TYPE_VIK_SUCCESS;
689 load_answer = LOAD_TYPE_VIK_FAILURE_NON_FATAL;
691 else if ( a_jpg_magic_check ( filename ) ) {
692 if ( ! a_jpg_load_file ( top, filename, vp ) )
693 load_answer = LOAD_TYPE_UNSUPPORTED_FAILURE;
697 // For all other file types which consist of tracks, routes and/or waypoints,
698 // must be loaded into a new TrackWaypoint layer (hence it be created)
699 gboolean success = TRUE; // Detect load failures - mainly to remove the layer created as it's not required
701 // Add to specified layer
702 gboolean add_new = !IS_VIK_TRW_LAYER(vtl);
704 vtl = VIK_TRW_LAYER (vik_layer_create ( VIK_LAYER_TRW, vp, FALSE ));
705 vik_layer_rename ( VIK_LAYER(vtl), a_file_basename ( filename ) );
708 // In fact both kml & gpx files start the same as they are in xml
709 if ( a_file_check_ext ( filename, ".kml" ) && check_magic ( f, GPX_MAGIC, GPX_MAGIC_LEN ) ) {
710 // Implicit Conversion
711 ProcessOptions po = { "-i kml", filename, NULL, NULL, NULL, NULL };
712 if ( ! ( success = a_babel_convert_from ( vtl, &po, NULL, NULL, NULL ) ) ) {
713 load_answer = LOAD_TYPE_GPSBABEL_FAILURE;
716 // NB use a extension check first, as a GPX file header may have a Byte Order Mark (BOM) in it
717 // - which currently confuses our check_magic function
718 else if ( a_file_check_ext ( filename, ".gpx" ) || check_magic ( f, GPX_MAGIC, GPX_MAGIC_LEN ) ) {
719 if ( ! ( success = a_gpx_read_file ( vtl, f ) ) ) {
720 load_answer = LOAD_TYPE_GPX_FAILURE;
724 // Try final supported file type
725 if ( ! ( success = a_gpspoint_read_file ( vtl, f, dirpath ) ) ) {
726 // Failure here means we don't know how to handle the file
727 load_answer = LOAD_TYPE_UNSUPPORTED_FAILURE;
730 // Clean up when we can't handle the file
733 g_object_unref ( vtl );
736 // Complete the setup from the successful load
737 vik_layer_post_read ( VIK_LAYER(vtl), vp, TRUE );
739 vik_aggregate_layer_add_layer ( top, VIK_LAYER(vtl), FALSE );
742 // Make it more accessible in layers panel
743 vik_layer_expand_tree ( VIK_LAYER(vtl) );
745 vik_trw_layer_auto_set_view ( vtl, vp );
753 gboolean a_file_save ( VikAggregateLayer *top, gpointer vp, const gchar *filename )
757 if (strncmp(filename, "file://", 7) == 0)
758 filename = filename + 7;
760 f = g_fopen(filename, "w");
765 // Enable relative paths in .vik files to work
766 gchar *cwd = g_get_current_dir();
767 gchar *dir = g_path_get_dirname ( filename );
769 if ( g_chdir ( dir ) ) {
770 g_warning ( "Could not change directory to %s", dir );
775 file_write ( top, f, vp );
777 // Restore previous working directory
779 if ( g_chdir ( cwd ) ) {
780 g_warning ( "Could not return to directory %s", cwd );
793 gboolean is_gpx = a_file_check_ext ( "a/b/c.gpx", ".gpx" );
795 gboolean a_file_check_ext ( const gchar *filename, const gchar *fileext )
797 g_return_val_if_fail ( filename != NULL, FALSE );
798 g_return_val_if_fail ( fileext && fileext[0]=='.', FALSE );
799 const gchar *basename = a_file_basename(filename);
803 const char * dot = strrchr(basename, '.');
804 if (dot && !strcmp(dot, fileext))
812 * @vtl: The TrackWaypoint to export data from
813 * @filename: The name of the file to be written
814 * @file_type: Choose one of the supported file types for the export
815 * @trk: If specified then only export this track rather than the whole layer
816 * @write_hidden: Whether to write invisible items
818 * A general export command to convert from Viking TRW layer data to an external supported format.
819 * The write_hidden option is provided mainly to be able to transfer selected items when uploading to a GPS
821 gboolean a_file_export ( VikTrwLayer *vtl, const gchar *filename, VikFileType_t file_type, VikTrack *trk, gboolean write_hidden )
823 GpxWritingOptions options = { FALSE, FALSE, write_hidden, FALSE };
824 FILE *f = g_fopen ( filename, "w" );
827 gboolean result = TRUE;
830 switch ( file_type ) {
832 // trk defined so can set the option
833 options.is_route = trk->is_route;
834 a_gpx_write_track_file ( trk, f, &options );
837 g_critical("Houston, we've had a problem. file_type=%d", file_type);
840 switch ( file_type ) {
841 case FILE_TYPE_GPSMAPPER:
842 a_gpsmapper_write_file ( vtl, f );
845 a_gpx_write_file ( vtl, f, &options );
847 case FILE_TYPE_GPSPOINT:
848 a_gpspoint_write_file ( vtl, f );
850 case FILE_TYPE_GEOJSON:
851 result = a_geojson_write_file ( vtl, f );
855 switch ( a_vik_get_kml_export_units () ) {
856 case VIK_KML_EXPORT_UNITS_STATUTE:
857 return a_babel_convert_to ( vtl, NULL, "-o kml", filename, NULL, NULL );
859 case VIK_KML_EXPORT_UNITS_NAUTICAL:
860 return a_babel_convert_to ( vtl, NULL, "-o kml,units=n", filename, NULL, NULL );
863 // VIK_KML_EXPORT_UNITS_METRIC:
864 return a_babel_convert_to ( vtl, NULL, "-o kml,units=m", filename, NULL, NULL );
869 g_critical("Houston, we've had a problem. file_type=%d", file_type);
879 * a_file_export_babel:
881 gboolean a_file_export_babel ( VikTrwLayer *vtl, const gchar *filename, const gchar *format,
882 gboolean tracks, gboolean routes, gboolean waypoints )
884 gchar *args = g_strdup_printf("%s %s %s -o %s",
887 waypoints ? "-w" : "",
889 gboolean result = a_babel_convert_to ( vtl, NULL, args, filename, NULL, NULL );