src/clipboard.c

   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
  22 #ifdef HAVE_CONFIG_H
  23 #include "config.h"
  24 #endif
  25
  26 #include <string.h>
  27 #include <stdlib.h>
  28 #ifdef HAVE_SYS_TYPES_H
  29 #include <sys/types.h>
  30 #endif
  31 #ifdef HAVE_UNISTD_H
  32 #include <unistd.h>
  33 #endif
  34
  35 #include <glib/gi18n.h>
  36
  37 #include "viking.h"
  38
  39
  40 typedef struct {
  41   gpointer clipboard;
  42   gint pid;
  43   VikClipboardDataType type;
  44   gint subtype;
  45   guint16 layer_type;
  46   guint len;
  47   guint8 data[0];
  48 } vik_clipboard_t;
  49
  50 static GtkTargetEntry target_table[] = {
  51   { "application/viking", 0, 0 },
  52   { "STRING", 0, 1 },
  53 };
  54
  55 /*****************************************************************
  56  ** functions which send to the clipboard client (we are owner) **
  57  *****************************************************************/
  58
  59 static void clip_get ( GtkClipboard *c, GtkSelectionData *selection_data, guint info, gpointer p )
  60 {
  61   vik_clipboard_t *vc = p;
  62   if (info==0) {
  63     //    g_print("clip_get: vc = %p, size = %d\n", vc, sizeof(*vc) + vc->len);
  64     gtk_selection_data_set ( selection_data, selection_data->target, 8, (void *)vc, sizeof(*vc) + vc->len );
  65   }
  66 }
  67
  68 static void clip_clear ( GtkClipboard *c, gpointer p )
  69 {
  70   g_free(p);
  71 }
  72
  73
  74 /**************************************************************************
  75  ** functions which receive from the clipboard owner (we are the client) **
  76  **************************************************************************/
  77
  78 /* our own data type */
  79 static void clip_receive_viking ( GtkClipboard *c, GtkSelectionData *sd, gpointer p )
  80 {
  81   VikLayersPanel *vlp = p;
  82   vik_clipboard_t *vc;
  83   if (sd->length == -1) {
  84     g_warning ( _("paste failed") );
  85     return;
  86   }
  87   //  g_print("clip receive: target = %s, type = %s\n", gdk_atom_name(sd->target), gdk_atom_name(sd->type));
  88   g_assert(!strcmp(gdk_atom_name(sd->target), target_table[0].target));
  89
  90   vc = (vik_clipboard_t *)sd->data;
  91   //  g_print("  sd->data = %p, sd->length = %d, vc->len = %d\n", sd->data, sd->length, vc->len);
  92
  93   if (sd->length != sizeof(*vc) + vc->len) {
  94     g_warning ( _("wrong clipboard data size") );
  95     return;
  96   }
  97
  98   if ( vc->type == VIK_CLIPBOARD_DATA_LAYER )
  99   {
 100     VikLayer *new_layer = vik_layer_unmarshall ( vc->data, vc->len, vik_layers_panel_get_viewport(vlp) );
 101     vik_layers_panel_add_layer ( vlp, new_layer );
 102   }
 103   else if ( vc->type == VIK_CLIPBOARD_DATA_SUBLAYER )
 104   {
 105     VikLayer *sel = vik_layers_panel_get_selected ( vlp );
 106     if ( sel && sel->type == vc->layer_type)
 107     {
 108       if ( vik_layer_get_interface(vc->layer_type)->paste_item )
 109         vik_layer_get_interface(vc->layer_type)->paste_item ( sel, vc->subtype, vc->data, vc->len);
 110     }
 111     else
 112       a_dialog_error_msg_extra ( VIK_GTK_WINDOW_FROM_WIDGET(GTK_WIDGET(vlp)),
 113                                  _("The clipboard contains sublayer data for a %s layers."
 114                                    "You must select a layer of this type to paste the clipboard data."),
 115                                  vik_layer_get_interface(vc->layer_type)->name );
 116   }
 117 }
 118
 119
 120
 121 /*
 122  * utility func to handle pasted text:
 123  * search for N dd.dddddd W dd.dddddd, N dd° dd.dddd W dd° dd.ddddd and so forth
 124  */
 125 static gboolean clip_parse_latlon ( const gchar *text, struct LatLon *coord )
 126 {
 127   gint latdeg, londeg;
 128   gdouble latm, lonm;
 129   gdouble lat, lon;
 130   gchar *cand;
 131   gint len, i;
 132   gchar *s = g_strdup(text);
 133
 134   //  g_print("parsing %s\n", s);
 135
 136   len = strlen(s);
 137
 138   /* remove non-digits following digits; gets rid of degree symbols or whatever people use, and
 139    * punctuation
 140    */
 141   for (i=0; i<len-2; i++) {
 142     if (g_ascii_isdigit (s[i]) && s[i+1] != '.' && !g_ascii_isdigit (s[i+1])) {
 143       s[i+1] = ' ';
 144       if (!g_ascii_isalnum (s[i+2]) && s[i+2] != '-') {
 145         s[i+2] = ' ';
 146       }
 147     }
 148   }
 149
 150   /* now try reading coordinates */
 151   for (i=0; i<len; i++) {
 152     if (s[i] == 'N' || s[i] == 'S' || g_ascii_isdigit (s[i])) {
 153       gchar latc[2] = "SN";
 154       gchar lonc[2] = "WE";
 155       gint j, k;
 156       cand = s+i;
 157
 158       for (j=0; j<2; j++) {
 159         for (k=0; k<2; k++) {
 160           gchar fmt1[] = "N %d%*[ ]%lf W %d%*[ ]%lf";
 161           gchar fmt2[] = "%d%*[ ]%lf N %d%*[ ]%lf W";
 162           gchar fmt3[] = "N %lf W %lf";
 163           gchar fmt4[] = "%lf N %lf W";
 164
 165           fmt1[0]  = latc[j];     fmt1[13] = lonc[k];
 166           fmt2[11] = latc[j];     fmt2[24] = lonc[k];
 167           fmt3[0]  = latc[j];     fmt3[6]  = lonc[k];
 168           fmt4[4]  = latc[j];     fmt4[10] = lonc[k];
 169
 170           if (sscanf(cand, fmt1, &latdeg, &latm, &londeg, &lonm) == 4 ||
 171               sscanf(cand, fmt2, &latdeg, &latm, &londeg, &lonm) == 4) {
 172             lat = (j*2-1) * (latdeg + latm / 60);
 173             lon = (k*2-1) * (londeg + lonm / 60);
 174             break;
 175           }
 176           if (sscanf(cand, fmt3, &lat, &lon) == 2 ||
 177               sscanf(cand, fmt4, &lat, &lon) == 2) {
 178             lat *= (j*2-1);
 179             lon *= (k*2-1);
 180             break;
 181           }
 182         }
 183         if (k!=2) break;
 184       }
 185       if (j!=2) break;
 186
 187       if (sscanf(cand, "%d%*[ ]%lf %d%*[ ]%lf", &latdeg, &latm, &londeg, &lonm) == 4) {
 188         lat = latdeg/abs(latdeg) * (abs(latdeg) + latm / 60);
 189         lon = londeg/abs(londeg) * (abs(londeg) + lonm / 60);
 190         break;
 191       }
 192       if (sscanf(cand, "%lf %lf", &lat, &lon) == 2) {
 193         break;
 194       }
 195     }
 196   }
 197   g_free(s);
 198
 199   /* did we get to the end without actually finding a coordinate? */
 200   if (i<len && lat >= -90.0 && lat <= 90.0 && lon >= -180.0 && lon <= 180.0) {
 201     coord->lat = lat;
 202     coord->lon = lon;
 203     return TRUE;
 204   }
 205   return FALSE;
 206 }
 207
 208 static void clip_add_wp(VikLayersPanel *vlp, struct LatLon *coord)
 209 {
 210   VikCoord vc;
 211   VikLayer *sel = vik_layers_panel_get_selected ( vlp );
 212
 213
 214   vik_coord_load_from_latlon ( &vc, VIK_COORD_LATLON, coord );
 215
 216   if (sel && sel->type == VIK_LAYER_TRW) {
 217     vik_trw_layer_new_waypoint ( VIK_TRW_LAYER(sel), VIK_GTK_WINDOW_FROM_LAYER(sel), &vc );
 218   } else {
 219     a_dialog_error_msg_extra ( VIK_GTK_WINDOW_FROM_WIDGET(GTK_WIDGET(vlp)), _("In order to paste a waypoint, please select an appropriate layer to paste into."), NULL);
 220   }
 221 }
 222
 223 static void clip_receive_text (GtkClipboard *c, const gchar *text, gpointer p)
 224 {
 225   VikLayersPanel *vlp = p;
 226   struct LatLon coord;
 227   //  g_print("got text: %s\n", text);
 228   if (clip_parse_latlon(text, &coord)) {
 229     clip_add_wp(vlp, &coord);
 230   }
 231 }
 232
 233 static void clip_receive_html ( GtkClipboard *c, GtkSelectionData *sd, gpointer p )
 234 {
 235   VikLayersPanel *vlp = p;
 236   gsize r, w;
 237   GError *err = NULL;
 238   gchar *s, *span;
 239   gint tag = 0, i;
 240   struct LatLon coord;
 241
 242   if (sd->length == -1) {
 243     return;
 244   }
 245
 246   /* - copying from Mozilla seems to give html in UTF-16. */
 247   if (!(s =  g_convert ( (gchar *)sd->data, sd->length, "UTF-8", "UTF-16", &r, &w, &err))) {
 248     return;
 249   }
 250   //  g_print("html is %d bytes long: %s\n", sd->length, s);
 251
 252   /* scrape a coordinate pasted from a geocaching.com page: look for a
 253    * telltale tag if possible, and then remove tags
 254    */
 255   if (!(span = g_strstr_len(s, w, "<span id=\"LatLon\">"))) {
 256     span = s;
 257   }
 258   for (i=0; i<strlen(span); i++) {
 259     gchar c = span[i];
 260     if (c == '<') {
 261       tag++;
 262     }
 263     if (tag>0) {
 264       span[i] = ' ';
 265     }
 266     if (c == '>') {
 267       if (tag>0) tag--;
 268     }
 269   }
 270   if (clip_parse_latlon(span, &coord)) {
 271     clip_add_wp(vlp, &coord);
 272   }
 273
 274   g_free(s);
 275 }
 276
 277 /*
 278  * deal with various data types a clipboard may hold
 279  */
 280 void clip_receive_targets ( GtkClipboard *c, GdkAtom *a, gint n, gpointer p )
 281 {
 282   VikLayersPanel *vlp = p;
 283   gint i;
 284
 285   /*  g_print("got targets\n"); */
 286   for (i=0; i<n; i++) {
 287     /* g_print("  ""%s""\n", gdk_atom_name(a[i])); */
 288     if (!strcmp(gdk_atom_name(a[i]), "text/html")) {
 289       gtk_clipboard_request_contents ( c, gdk_atom_intern("text/html", TRUE), clip_receive_html, vlp );
 290       break;
 291     }
 292     if (a[i] == GDK_TARGET_STRING) {
 293       gtk_clipboard_request_text ( c, clip_receive_text, vlp );
 294       break;
 295     }
 296     if (!strcmp(gdk_atom_name(a[i]), "application/viking")) {
 297       gtk_clipboard_request_contents ( c, gdk_atom_intern("application/viking", TRUE), clip_receive_viking, vlp );
 298       break;
 299     }
 300   }
 301 }
 302
 303 /*********************************************************************************
 304  ** public functions                                                            **
 305  *********************************************************************************/
 306
 307 /*
 308  * make a copy of selected object and associate ourselves with the clipboard
 309  */
 310 void a_clipboard_copy_selected ( VikLayersPanel *vlp )
 311 {
 312   VikLayer *sel = vik_layers_panel_get_selected ( vlp );
 313   GtkTreeIter iter;
 314   VikClipboardDataType type;
 315   guint16 layer_type = 0;
 316   gint subtype = 0;
 317   guint8 *data = NULL;
 318   guint len;
 319
 320   if ( ! sel )
 321     return;
 322
 323   vik_treeview_get_selected_iter ( sel->vt, &iter );
 324
 325   if ( vik_treeview_item_get_type ( sel->vt, &iter ) == VIK_TREEVIEW_TYPE_SUBLAYER ) {
 326     type = VIK_CLIPBOARD_DATA_SUBLAYER;
 327     layer_type = sel->type;
 328     if ( vik_layer_get_interface(layer_type)->copy_item) {
 329       subtype = vik_treeview_item_get_data(sel->vt, &iter);
 330       vik_layer_get_interface(layer_type)->copy_item(sel, subtype, vik_treeview_item_get_pointer(sel->vt, &iter), &data, &len );
 331     }
 332   }
 333   else
 334   {
 335     gint ilen;
 336     type = VIK_CLIPBOARD_DATA_LAYER;
 337     vik_layer_marshall ( sel, &data, &ilen );
 338     len = ilen;
 339   }
 340
 341   if (data)
 342     a_clipboard_copy( type, layer_type, subtype, len, data);
 343
 344 }
 345
 346 void a_clipboard_copy( VikClipboardDataType type, guint16 layer_type, gint subtype, guint len, guint8 * data)
 347 {
 348   vik_clipboard_t * vc = g_malloc(sizeof(*vc) + len);
 349   GtkClipboard *c = gtk_clipboard_get ( GDK_SELECTION_CLIPBOARD );
 350
 351   vc->type = type;
 352   vc->layer_type = layer_type;
 353   vc->subtype = subtype;
 354   vc->len = len;
 355   memcpy(vc->data, data, len);
 356   g_free(data);
 357   vc->pid = getpid();
 358   gtk_clipboard_set_with_data ( c, target_table, G_N_ELEMENTS(target_table), clip_get, clip_clear, vc );
 359 }
 360
 361 /*
 362  * to deal with multiple data types, we first request the type of data on the clipboard,
 363  * and handle them in the callback
 364  */
 365 gboolean a_clipboard_paste ( VikLayersPanel *vlp )
 366 {
 367   GtkClipboard *c = gtk_clipboard_get ( GDK_SELECTION_CLIPBOARD );
 368   gtk_clipboard_request_targets ( c, clip_receive_targets, vlp );
 369   return TRUE;
 370 }
 371