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