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