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;
263 vik_layer_set_param ( VIK_LAYER(layer_and_vp[0]), &vlsp );
267 * Read in a Viking file and return how successful the parsing was
268 * ATM this will always work, in that even if there are parsing problems
269 * then there will be no new values to override the defaults
271 * TODO flow up line number(s) / error messages of problems encountered...
274 static gboolean file_read ( VikAggregateLayer *top, FILE *f, const gchar *dirpath, VikViewport *vp )
277 struct LatLon ll = { 0.0, 0.0 };
283 VikLayerParam *params = NULL; /* for current layer, so we don't have to keep on looking up interface */
284 guint8 params_count = 0;
286 GHashTable *string_lists = g_hash_table_new(g_direct_hash,g_direct_equal);
288 gboolean successful_read = TRUE;
292 stack->data = (gpointer) top;
294 while ( fgets ( buffer, 4096, f ) )
299 while ( *line == ' ' || *line =='\t' )
302 if ( line[0] == '#' )
307 if ( len > 0 && line[len-1] == '\n' )
309 if ( len > 0 && line[len-1] == '\r' )
316 if ( line[0] == '~' )
321 else if ( str_starts_with ( line, "Layer ", 6, TRUE ) )
323 int parent_type = VIK_LAYER(stack->data)->type;
324 if ( ( ! stack->data ) || ((parent_type != VIK_LAYER_AGGREGATE) && (parent_type != VIK_LAYER_GPS)) )
326 successful_read = FALSE;
327 g_warning ( "Line %ld: Layer command inside non-Aggregate Layer (type %d)", line_num, parent_type );
328 push(&stack); /* inside INVALID layer */
334 VikLayerTypeEnum type = vik_layer_type_from_string ( line+6 );
336 if ( type == VIK_LAYER_NUM_TYPES )
338 successful_read = FALSE;
339 g_warning ( "Line %ld: Unknown type %s", line_num, line+6 );
342 else if (parent_type == VIK_LAYER_GPS)
344 stack->data = (gpointer) vik_gps_layer_get_a_child(VIK_GPS_LAYER(stack->under->data));
345 params = vik_layer_get_interface(type)->params;
346 params_count = vik_layer_get_interface(type)->params_count;
350 stack->data = (gpointer) vik_layer_create ( type, vp, FALSE );
351 params = vik_layer_get_interface(type)->params;
352 params_count = vik_layer_get_interface(type)->params_count;
356 else if ( str_starts_with ( line, "EndLayer", 8, FALSE ) )
358 if ( stack->under == NULL ) {
359 successful_read = FALSE;
360 g_warning ( "Line %ld: Mismatched ~EndLayer command", line_num );
364 /* add any string lists we've accumulated */
365 gpointer layer_and_vp[3];
366 layer_and_vp[0] = stack->data;
367 layer_and_vp[1] = vp;
368 layer_and_vp[2] = (gpointer)dirpath;
369 g_hash_table_foreach ( string_lists, (GHFunc) string_list_set_param, layer_and_vp );
370 g_hash_table_remove_all ( string_lists );
372 if ( stack->data && stack->under->data )
374 if (VIK_LAYER(stack->under->data)->type == VIK_LAYER_AGGREGATE) {
375 vik_aggregate_layer_add_layer ( VIK_AGGREGATE_LAYER(stack->under->data), VIK_LAYER(stack->data), FALSE );
376 vik_layer_post_read ( VIK_LAYER(stack->data), vp, TRUE );
378 else if (VIK_LAYER(stack->under->data)->type == VIK_LAYER_GPS) {
379 /* TODO: anything else needs to be done here ? */
382 successful_read = FALSE;
383 g_warning ( "Line %ld: EndLayer command inside non-Aggregate Layer (type %d)", line_num, VIK_LAYER(stack->data)->type );
389 else if ( str_starts_with ( line, "LayerData", 9, FALSE ) )
391 if ( stack->data && vik_layer_get_interface(VIK_LAYER(stack->data)->type)->read_file_data )
393 /* must read until hits ~EndLayerData */
394 if ( ! vik_layer_get_interface(VIK_LAYER(stack->data)->type)->read_file_data ( VIK_LAYER(stack->data), f, dirpath ) )
395 successful_read = FALSE;
398 { /* simply skip layer data over */
399 while ( fgets ( buffer, 4096, f ) )
406 if ( len > 0 && line[len-1] == '\n' )
408 if ( len > 0 && line[len-1] == '\r' )
410 if ( strcasecmp ( line, "~EndLayerData" ) == 0 )
418 successful_read = FALSE;
419 g_warning ( "Line %ld: Unknown tilde command", line_num );
429 for ( i = 0; i < len; i++ )
430 if ( line[i] == '=' )
433 if ( stack->under == NULL && eq_pos == 12 && strncasecmp ( line, "FILE_VERSION", eq_pos ) == 0) {
434 gint version = strtol(line+13, NULL, 10);
435 g_debug ( "%s: reading file version %d", __FUNCTION__, version );
436 if ( version > VIKING_FILE_VERSION )
437 successful_read = FALSE;
438 // However we'll still carry and attempt to read whatever we can
440 else if ( stack->under == NULL && eq_pos == 4 && strncasecmp ( line, "xmpp", eq_pos ) == 0) /* "hard coded" params: global & for all layer-types */
441 vik_viewport_set_xmpp ( VIK_VIEWPORT(vp), strtod_i8n ( line+5, NULL ) );
442 else if ( stack->under == NULL && eq_pos == 4 && strncasecmp ( line, "ympp", eq_pos ) == 0)
443 vik_viewport_set_ympp ( VIK_VIEWPORT(vp), strtod_i8n ( line+5, NULL ) );
444 else if ( stack->under == NULL && eq_pos == 3 && strncasecmp ( line, "lat", eq_pos ) == 0 )
445 ll.lat = strtod_i8n ( line+4, NULL );
446 else if ( stack->under == NULL && eq_pos == 3 && strncasecmp ( line, "lon", eq_pos ) == 0 )
447 ll.lon = strtod_i8n ( line+4, NULL );
448 else if ( stack->under == NULL && eq_pos == 4 && strncasecmp ( line, "mode", eq_pos ) == 0 && strcasecmp ( line+5, "utm" ) == 0)
449 vik_viewport_set_drawmode ( VIK_VIEWPORT(vp), VIK_VIEWPORT_DRAWMODE_UTM);
450 else if ( stack->under == NULL && eq_pos == 4 && strncasecmp ( line, "mode", eq_pos ) == 0 && strcasecmp ( line+5, "expedia" ) == 0)
451 vik_viewport_set_drawmode ( VIK_VIEWPORT(vp), VIK_VIEWPORT_DRAWMODE_EXPEDIA );
452 else if ( stack->under == NULL && eq_pos == 4 && strncasecmp ( line, "mode", eq_pos ) == 0 && strcasecmp ( line+5, "google" ) == 0)
454 successful_read = FALSE;
455 g_warning ( _("Draw mode '%s' no more supported"), "google" );
457 else if ( stack->under == NULL && eq_pos == 4 && strncasecmp ( line, "mode", eq_pos ) == 0 && strcasecmp ( line+5, "kh" ) == 0)
459 successful_read = FALSE;
460 g_warning ( _("Draw mode '%s' no more supported"), "kh" );
462 else if ( stack->under == NULL && eq_pos == 4 && strncasecmp ( line, "mode", eq_pos ) == 0 && strcasecmp ( line+5, "mercator" ) == 0)
463 vik_viewport_set_drawmode ( VIK_VIEWPORT(vp), VIK_VIEWPORT_DRAWMODE_MERCATOR );
464 else if ( stack->under == NULL && eq_pos == 4 && strncasecmp ( line, "mode", eq_pos ) == 0 && strcasecmp ( line+5, "latlon" ) == 0)
465 vik_viewport_set_drawmode ( VIK_VIEWPORT(vp), VIK_VIEWPORT_DRAWMODE_LATLON );
466 else if ( stack->under == NULL && eq_pos == 5 && strncasecmp ( line, "color", eq_pos ) == 0 )
467 vik_viewport_set_background_color ( VIK_VIEWPORT(vp), line+6 );
468 else if ( stack->under == NULL && eq_pos == 14 && strncasecmp ( line, "highlightcolor", eq_pos ) == 0 )
469 vik_viewport_set_highlight_color ( VIK_VIEWPORT(vp), line+15 );
470 else if ( stack->under == NULL && eq_pos == 9 && strncasecmp ( line, "drawscale", eq_pos ) == 0 )
471 vik_viewport_set_draw_scale ( VIK_VIEWPORT(vp), TEST_BOOLEAN(line+10) );
472 else if ( stack->under == NULL && eq_pos == 14 && strncasecmp ( line, "drawcentermark", eq_pos ) == 0 )
473 vik_viewport_set_draw_centermark ( VIK_VIEWPORT(vp), TEST_BOOLEAN(line+15) );
474 else if ( stack->under == NULL && eq_pos == 13 && strncasecmp ( line, "drawhighlight", eq_pos ) == 0 )
475 vik_viewport_set_draw_highlight ( VIK_VIEWPORT(vp), TEST_BOOLEAN(line+14) );
476 else if ( stack->under && eq_pos == 4 && strncasecmp ( line, "name", eq_pos ) == 0 )
477 vik_layer_rename ( VIK_LAYER(stack->data), line+5 );
478 else if ( eq_pos == 7 && strncasecmp ( line, "visible", eq_pos ) == 0 )
479 VIK_LAYER(stack->data)->visible = TEST_BOOLEAN(line+8);
480 else if ( eq_pos != -1 && stack->under )
482 gboolean found_match = FALSE;
484 /* go thru layer params. if len == eq_pos && starts_with jazz, set it. */
485 /* also got to check for name and visible. */
489 successful_read = FALSE;
490 g_warning ( "Line %ld: No options for this kind of layer", line_num );
494 for ( i = 0; i < params_count; i++ )
495 if ( strlen(params[i].name) == eq_pos && strncasecmp ( line, params[i].name, eq_pos ) == 0 )
499 if ( params[i].type == VIK_LAYER_PARAM_STRING_LIST ) {
500 GList *l = g_list_append ( g_hash_table_lookup ( string_lists, GINT_TO_POINTER ((gint) i) ),
502 g_hash_table_replace ( string_lists, GINT_TO_POINTER ((gint)i), l );
503 /* add the value to a list, possibly making a new list.
504 * this will be passed to the layer when we read an ~EndLayer */
506 switch ( params[i].type )
508 case VIK_LAYER_PARAM_DOUBLE: x.d = strtod_i8n(line, NULL); break;
509 case VIK_LAYER_PARAM_UINT: x.u = strtoul(line, NULL, 10); break;
510 case VIK_LAYER_PARAM_INT: x.i = strtol(line, NULL, 10); break;
511 case VIK_LAYER_PARAM_BOOLEAN: x.b = TEST_BOOLEAN(line); break;
512 case VIK_LAYER_PARAM_COLOR: memset(&(x.c), 0, sizeof(x.c)); /* default: black */
513 gdk_color_parse ( line, &(x.c) ); break;
514 /* STRING or STRING_LIST -- if STRING_LIST, just set param to add a STRING */
518 VikLayerSetParam vlsp;
522 vlsp.is_file_operation = TRUE;
523 vik_layer_set_param ( VIK_LAYER(stack->data), &vlsp );
528 if ( ! found_match ) {
529 // ATM don't flow up this issue because at least one internal parameter has changed from version 1.3
530 // and don't what to worry users about raising such issues
531 // TODO Maybe hold old values here - compare the line value against them and if a match
532 // generate a different style of message in the GUI...
533 // successful_read = FALSE;
534 g_warning ( "Line %ld: Unknown parameter. Line:\n%s", line_num, line );
538 successful_read = FALSE;
539 g_warning ( "Line %ld: Invalid parameter or parameter outside of layer.", line_num );
553 if ( stack->under && stack->under->data && stack->data )
555 vik_aggregate_layer_add_layer ( VIK_AGGREGATE_LAYER(stack->under->data), VIK_LAYER(stack->data), FALSE );
556 vik_layer_post_read ( VIK_LAYER(stack->data), vp, TRUE );
561 if ( ll.lat != 0.0 || ll.lon != 0.0 )
562 vik_viewport_set_center_latlon ( VIK_VIEWPORT(vp), &ll, TRUE );
564 if ( ( ! VIK_LAYER(top)->visible ) && VIK_LAYER(top)->realized )
565 vik_treeview_item_set_visible ( VIK_LAYER(top)->vt, &(VIK_LAYER(top)->iter), FALSE );
567 /* delete anything we've forgotten about -- should only happen when file ends before an EndLayer */
568 g_hash_table_foreach ( string_lists, string_list_delete, NULL );
569 g_hash_table_destroy ( string_lists );
571 return successful_read;
578 new default layer of type (str_to_type) (check interface->name)
580 VikLayer *vl = stack->data;
582 vik_aggregate_layer_add_layer(stack->data, vl);
584 vik_layer_data ( VIK_LAYER_DATA(stack->data), f, vp );
588 /* ---------------------------------------------------- */
590 static FILE *xfopen ( const char *fn )
592 if ( strcmp(fn,"-") == 0 )
595 return g_fopen(fn, "r");
598 static void xfclose ( FILE *f )
600 if ( f != stdin && f != stdout ) {
607 * Function to determine if a filename is a 'viking' type file
609 gboolean check_file_magic_vik ( const gchar *filename )
611 gboolean result = FALSE;
612 FILE *ff = xfopen ( filename );
614 result = check_magic ( ff, VIK_MAGIC, VIK_MAGIC_LEN );
623 * Append a file extension, if not already present.
625 * Returns: a newly allocated string
627 gchar *append_file_ext ( const gchar *filename, VikFileType_t type )
629 gchar *new_name = NULL;
630 const gchar *ext = NULL;
632 /* Select an extension */
641 case FILE_TYPE_GEOJSON:
644 case FILE_TYPE_GPSMAPPER:
645 case FILE_TYPE_GPSPOINT:
647 /* Do nothing, ext already set to NULL */
652 if ( ext != NULL && ! a_file_check_ext ( filename, ext ) )
653 new_name = g_strconcat ( filename, ext, NULL );
655 /* Simply duplicate */
656 new_name = g_strdup ( filename );
661 VikLoadType_t a_file_load ( VikAggregateLayer *top, VikViewport *vp, VikTrwLayer *vtl, const gchar *filename_or_uri )
663 g_return_val_if_fail ( vp != NULL, LOAD_TYPE_READ_FAILURE );
665 char *filename = (char *)filename_or_uri;
666 if (strncmp(filename, "file://", 7) == 0) {
667 // Consider replacing this with:
668 // filename = g_filename_from_uri ( entry, NULL, NULL );
669 // Since this doesn't support URIs properly (i.e. will failure if is it has %20 characters in it)
670 filename = filename + 7;
671 g_debug ( "Loading file %s from URI %s", filename, filename_or_uri );
673 FILE *f = xfopen ( filename );
676 return LOAD_TYPE_READ_FAILURE;
678 VikLoadType_t load_answer = LOAD_TYPE_OTHER_SUCCESS;
680 gchar *dirpath = g_path_get_dirname ( filename );
681 // Attempt loading the primary file type first - our internal .vik file:
682 if ( check_magic ( f, VIK_MAGIC, VIK_MAGIC_LEN ) )
684 if ( file_read ( top, f, dirpath, vp ) )
685 load_answer = LOAD_TYPE_VIK_SUCCESS;
687 load_answer = LOAD_TYPE_VIK_FAILURE_NON_FATAL;
689 else if ( a_jpg_magic_check ( filename ) ) {
690 if ( ! a_jpg_load_file ( top, filename, vp ) )
691 load_answer = LOAD_TYPE_UNSUPPORTED_FAILURE;
695 // For all other file types which consist of tracks, routes and/or waypoints,
696 // must be loaded into a new TrackWaypoint layer (hence it be created)
697 gboolean success = TRUE; // Detect load failures - mainly to remove the layer created as it's not required
699 // Add to specified layer
700 gboolean add_new = !IS_VIK_TRW_LAYER(vtl);
702 vtl = VIK_TRW_LAYER (vik_layer_create ( VIK_LAYER_TRW, vp, FALSE ));
703 vik_layer_rename ( VIK_LAYER(vtl), a_file_basename ( filename ) );
706 // In fact both kml & gpx files start the same as they are in xml
707 if ( a_file_check_ext ( filename, ".kml" ) && check_magic ( f, GPX_MAGIC, GPX_MAGIC_LEN ) ) {
708 // Implicit Conversion
709 ProcessOptions po = { "-i kml", filename, NULL, NULL, NULL, NULL };
710 if ( ! ( success = a_babel_convert_from ( vtl, &po, NULL, NULL, NULL ) ) ) {
711 load_answer = LOAD_TYPE_GPSBABEL_FAILURE;
714 // NB use a extension check first, as a GPX file header may have a Byte Order Mark (BOM) in it
715 // - which currently confuses our check_magic function
716 else if ( a_file_check_ext ( filename, ".gpx" ) || check_magic ( f, GPX_MAGIC, GPX_MAGIC_LEN ) ) {
717 if ( ! ( success = a_gpx_read_file ( vtl, f ) ) ) {
718 load_answer = LOAD_TYPE_GPX_FAILURE;
722 // Try final supported file type
723 if ( ! ( success = a_gpspoint_read_file ( vtl, f, dirpath ) ) ) {
724 // Failure here means we don't know how to handle the file
725 load_answer = LOAD_TYPE_UNSUPPORTED_FAILURE;
728 // Clean up when we can't handle the file
731 g_object_unref ( vtl );
734 // Complete the setup from the successful load
735 vik_layer_post_read ( VIK_LAYER(vtl), vp, TRUE );
737 vik_aggregate_layer_add_layer ( top, VIK_LAYER(vtl), FALSE );
739 vik_trw_layer_auto_set_view ( vtl, vp );
747 gboolean a_file_save ( VikAggregateLayer *top, gpointer vp, const gchar *filename )
751 if (strncmp(filename, "file://", 7) == 0)
752 filename = filename + 7;
754 f = g_fopen(filename, "w");
759 // Enable relative paths in .vik files to work
760 gchar *cwd = g_get_current_dir();
761 gchar *dir = g_path_get_dirname ( filename );
763 if ( g_chdir ( dir ) ) {
764 g_warning ( "Could not change directory to %s", dir );
769 file_write ( top, f, vp );
771 // Restore previous working directory
773 if ( g_chdir ( cwd ) ) {
774 g_warning ( "Could not return to directory %s", cwd );
787 gboolean is_gpx = a_file_check_ext ( "a/b/c.gpx", ".gpx" );
789 gboolean a_file_check_ext ( const gchar *filename, const gchar *fileext )
791 g_return_val_if_fail ( filename != NULL, FALSE );
792 g_return_val_if_fail ( fileext && fileext[0]=='.', FALSE );
793 const gchar *basename = a_file_basename(filename);
797 const char * dot = strrchr(basename, '.');
798 if (dot && !strcmp(dot, fileext))
806 * @vtl: The TrackWaypoint to export data from
807 * @filename: The name of the file to be written
808 * @file_type: Choose one of the supported file types for the export
809 * @trk: If specified then only export this track rather than the whole layer
810 * @write_hidden: Whether to write invisible items
812 * A general export command to convert from Viking TRW layer data to an external supported format.
813 * The write_hidden option is provided mainly to be able to transfer selected items when uploading to a GPS
815 gboolean a_file_export ( VikTrwLayer *vtl, const gchar *filename, VikFileType_t file_type, VikTrack *trk, gboolean write_hidden )
817 GpxWritingOptions options = { FALSE, FALSE, write_hidden, FALSE };
818 FILE *f = g_fopen ( filename, "w" );
821 gboolean result = TRUE;
824 switch ( file_type ) {
826 // trk defined so can set the option
827 options.is_route = trk->is_route;
828 a_gpx_write_track_file ( trk, f, &options );
831 g_critical("Houston, we've had a problem. file_type=%d", file_type);
834 switch ( file_type ) {
835 case FILE_TYPE_GPSMAPPER:
836 a_gpsmapper_write_file ( vtl, f );
839 a_gpx_write_file ( vtl, f, &options );
841 case FILE_TYPE_GPSPOINT:
842 a_gpspoint_write_file ( vtl, f );
844 case FILE_TYPE_GEOJSON:
845 result = a_geojson_write_file ( vtl, f );
849 switch ( a_vik_get_kml_export_units () ) {
850 case VIK_KML_EXPORT_UNITS_STATUTE:
851 return a_babel_convert_to ( vtl, NULL, "-o kml", filename, NULL, NULL );
853 case VIK_KML_EXPORT_UNITS_NAUTICAL:
854 return a_babel_convert_to ( vtl, NULL, "-o kml,units=n", filename, NULL, NULL );
857 // VIK_KML_EXPORT_UNITS_METRIC:
858 return a_babel_convert_to ( vtl, NULL, "-o kml,units=m", filename, NULL, NULL );
863 g_critical("Houston, we've had a problem. file_type=%d", file_type);
873 * a_file_export_babel:
875 gboolean a_file_export_babel ( VikTrwLayer *vtl, const gchar *filename, const gchar *format,
876 gboolean tracks, gboolean routes, gboolean waypoints )
878 gchar *args = g_strdup_printf("%s %s %s -o %s",
881 waypoints ? "-w" : "",
883 gboolean result = a_babel_convert_to ( vtl, NULL, args, filename, NULL, NULL );