src/dnd.c

   1 /*
   2  * GQview image viewer
   3  * (C)2000 John Ellis
   4  *
   5  * Author: John Ellis
   6  *
   7  */
   8
   9 #include "gqview.h"
  10 #include "image.h"
  11
  12 enum {
  13         TARGET_URI_LIST,
  14         TARGET_TEXT_PLAIN
  15 };
  16
  17 static GtkTargetEntry file_drag_types[] = {
  18         { "text/uri-list", 0, TARGET_URI_LIST },
  19         { "text/plain", 0, TARGET_TEXT_PLAIN }
  20 };
  21 static gint n_file_drag_types = 2;
  22
  23 static GtkTargetEntry file_drop_types[] = {
  24         { "text/uri-list", 0, TARGET_URI_LIST }
  25 };
  26 static gint n_file_drop_types = 1;
  27
  28 static GList *get_uri_file_list(gchar *data);
  29
  30 static void image_get_dnd_data(GtkWidget *widget, GdkDragContext *context,
  31                                gint x, gint y,
  32                                GtkSelectionData *selection_data, guint info,
  33                                guint time, gpointer data);
  34 static void image_set_dnd_data(GtkWidget *widget, GdkDragContext *context,
  35                               GtkSelectionData *selection_data, guint info,
  36                               guint time, gpointer data);
  37 static void image_drag_end(GtkWidget *widget, GdkDragContext *context, gpointer data);
  38
  39 static void file_list_set_dnd_data(GtkWidget *widget, GdkDragContext *context,
  40                               GtkSelectionData *selection_data, guint info,
  41                               guint time, gpointer data);
  42 static void file_list_drag_begin(GtkWidget *widget, GdkDragContext *context, gpointer data);
  43 static void file_list_drag_end(GtkWidget *widget, GdkDragContext *context, gpointer data);
  44
  45 static void dir_list_set_dnd_data(GtkWidget *widget, GdkDragContext *context,
  46                               GtkSelectionData *selection_data, guint info,
  47                               guint time, gpointer data);
  48 static void dir_clist_set_highlight(gint set);
  49 static void dir_list_drag_begin(GtkWidget *widget, GdkDragContext *context, gpointer data);
  50 static void dir_list_drag_end(GtkWidget *widget, GdkDragContext *context, gpointer data);
  51
  52 static GList *get_uri_file_list(gchar *data)
  53 {
  54         GList *list = NULL;
  55         gint b, e;
  56
  57         b = e = 0;
  58
  59         while (data[b] != '\0')
  60                 {
  61                 while (data[e] != '\r' && data[e] != '\n' && data[e] != '\0') e++;
  62                 if (!strncmp(data + b, "file:", 5))
  63                         {
  64                         b += 5;
  65                         list = g_list_append(list, g_strndup(data + b, e - b));
  66                         }
  67                 while (data[e] == '\r' || data[e] == '\n') e++;
  68                 b = e;
  69                 }
  70
  71         return list;
  72 }
  73
  74 /*
  75  *-----------------------------------------------------------------------------
  76  * image drag and drop routines
  77  *-----------------------------------------------------------------------------
  78  */
  79
  80 static void image_get_dnd_data(GtkWidget *widget, GdkDragContext *context,
  81                                gint x, gint y,
  82                                GtkSelectionData *selection_data, guint info,
  83                                guint time, gpointer data)
  84 {
  85         ImageWindow *imd = data;
  86
  87         if (info == TARGET_URI_LIST)
  88                 {
  89                 GList *list = get_uri_file_list(selection_data->data);
  90                 if (list)
  91                         {
  92                         gchar *path;
  93
  94                         path = list->data;
  95
  96                         if (imd == normal_image)
  97                                 {
  98                                 if (isfile(path))
  99                                         {
 100                                         gint row;
 101                                         gchar *dir = remove_level_from_path(path);
 102                                         if (strcmp(dir, current_path) != 0)
 103                                                 filelist_change_to(dir);
 104                                         g_free(dir);
 105
 106                                         row = find_file_in_list(path);
 107                                         if (row == -1)
 108                                                 image_change_to(path);
 109                                         else
 110                                                 file_image_change_to(row);
 111                                         }
 112                                 else if (isdir(path))
 113                                         {
 114                                         filelist_change_to(path);
 115                                         image_change_to(NULL);
 116                                         }
 117                                 }
 118                         else
 119                                 {
 120                                 if (isfile(path))
 121                                         {
 122                                         image_area_set_image(imd, path, get_default_zoom(imd));
 123                                         }
 124                                 }
 125
 126                         if (debug)
 127                                 {
 128                                 GList *work = list;
 129                                 while (work)
 130                                         {
 131                                         printf("dropped: %s\n", (gchar *)(work->data));
 132                                         work = work->next;
 133                                         }
 134                                 }
 135
 136                         g_list_foreach(list, (GFunc)g_free, NULL);
 137                         g_list_free(list);
 138                         }
 139                 }
 140 }
 141
 142 static void image_set_dnd_data(GtkWidget *widget, GdkDragContext *context,
 143                                GtkSelectionData *selection_data, guint info,
 144                                guint time, gpointer data)
 145 {
 146         ImageWindow *imd = data;
 147         gchar *path = image_area_get_path(imd);
 148
 149         if (path)
 150                 {
 151                 gchar *text = NULL;
 152                 switch (info)
 153                         {
 154                         case TARGET_URI_LIST:
 155                                 text = g_strconcat("file:", path, "\r\n", NULL);
 156                                 break;
 157                         case TARGET_TEXT_PLAIN:
 158                                 text = g_strdup(path);
 159                                 break;
 160                         }
 161                 if (text)
 162                         {
 163                         gtk_selection_data_set (selection_data, selection_data->target,
 164                                                 8, text, strlen(text));
 165                         g_free(text);
 166                         }
 167                 }
 168         else
 169                 {
 170                 gtk_selection_data_set (selection_data, selection_data->target,
 171                                         8, NULL, 0);
 172                 }
 173 }
 174
 175 static void image_drag_end(GtkWidget *widget, GdkDragContext *context, gpointer data)
 176 {
 177         ImageWindow *imd = data;
 178         if (context->action == GDK_ACTION_MOVE)
 179                 {
 180                 gint row = find_file_in_list(image_area_get_path(imd));
 181                 if (row < 0) return;
 182                 if (image_get_path() && strcmp(image_get_path(), image_area_get_path(imd)) == 0)
 183                         {
 184                         if (row < file_count() - 1)
 185                                 {
 186                                 file_next_image();
 187                                 }
 188                         else
 189                                 {
 190                                 file_prev_image();
 191                                 }
 192                         }
 193                 filelist_refresh();
 194                 }
 195 }
 196
 197 void image_dnd_init(ImageWindow *imd)
 198 {
 199         gtk_drag_source_set(imd->viewport, GDK_BUTTON2_MASK,
 200                                 file_drag_types, n_file_drag_types, GDK_ACTION_COPY | GDK_ACTION_MOVE | GDK_ACTION_LINK);
 201         gtk_signal_connect(GTK_OBJECT(imd->viewport), "drag_data_get",
 202                                 image_set_dnd_data, imd);
 203         gtk_signal_connect(GTK_OBJECT(imd->viewport), "drag_end",
 204                                 image_drag_end, imd);
 205
 206         gtk_drag_dest_set(imd->viewport,
 207                           GTK_DEST_DEFAULT_MOTION | GTK_DEST_DEFAULT_HIGHLIGHT | GTK_DEST_DEFAULT_DROP,
 208                           file_drop_types, n_file_drop_types,
 209                           GDK_ACTION_COPY);
 210         gtk_signal_connect(GTK_OBJECT(imd->viewport), "drag_data_received",
 211                                 image_get_dnd_data, imd);
 212 }
 213
 214 /*
 215  *-----------------------------------------------------------------------------
 216  * file list drag and drop routines (private)
 217  *-----------------------------------------------------------------------------
 218  */
 219
 220 static void file_list_set_dnd_data(GtkWidget *widget, GdkDragContext *context,
 221                               GtkSelectionData *selection_data, guint info,
 222                               guint time, gpointer data)
 223 {
 224         gchar *uri_text = NULL;
 225         gchar *leader = "file:";
 226         gchar *sep = "\r\n";
 227         gint total;
 228         gint leader_l;
 229         gint sep_l = strlen(sep);
 230         gchar *ptr;
 231
 232         switch (info)
 233                 {
 234                 case TARGET_URI_LIST:
 235                         leader_l = strlen(leader);
 236                         break;
 237                 case TARGET_TEXT_PLAIN:
 238                         leader_l = 0;
 239                         break;
 240                 default:
 241                         return;
 242                         break;
 243                 }
 244
 245         if (file_clicked_is_selected())
 246                 {
 247                 GList *list;
 248                 GList *work;
 249
 250                 list = file_get_selected_list();
 251                 if (!list) return;
 252                 work = list;
 253                 total = 0;
 254
 255                 /* compute length */
 256
 257                 while (work)
 258                         {
 259                         gchar *name = work->data;
 260                         total += leader_l + strlen(name) + sep_l;
 261                         work = work->next;
 262                         }
 263
 264                 /* create list */
 265                 uri_text = g_malloc(total + 1);
 266                 ptr = uri_text;
 267
 268                 work = list;
 269                 while (work)
 270                         {
 271                         gchar *name = work->data;
 272                         if (leader_l > 0)
 273                                 {
 274                                 strcpy(ptr, leader);
 275                                 ptr += leader_l;
 276                                 }
 277                         strcpy(ptr, name);
 278                         ptr += strlen(name);
 279                         strcpy(ptr, sep);
 280                         ptr += sep_l;
 281                         work = work->next;
 282                         }
 283                 ptr[0] = '\0';
 284                 free_selected_list(list);
 285                 }
 286         else
 287                 {
 288                 gchar *path = file_clicked_get_path();
 289                 if (!path) return;
 290                 switch (info)
 291                         {
 292                         case TARGET_URI_LIST:
 293                                 uri_text = g_strconcat("file:", path, "\r\n", NULL);
 294                                 break;
 295                         case TARGET_TEXT_PLAIN:
 296                                 uri_text = g_strdup(path);
 297                                 break;
 298                         }
 299                 total = strlen(uri_text);
 300                 g_free(path);
 301                 }
 302
 303         if (debug) printf(uri_text);
 304
 305         gtk_selection_data_set (selection_data, selection_data->target,
 306                                         8, uri_text, total);
 307         g_free(uri_text);
 308
 309         file_clist_highlight_unset();
 310 }
 311
 312 static void file_list_drag_begin(GtkWidget *widget, GdkDragContext *context, gpointer data)
 313 {
 314         file_clist_highlight_set();
 315 }
 316
 317 static void file_list_drag_end(GtkWidget *widget, GdkDragContext *context, gpointer data)
 318 {
 319         file_clist_highlight_unset();
 320
 321         if (context->action == GDK_ACTION_MOVE)
 322                 {
 323                 filelist_refresh();
 324                 }
 325 }
 326
 327 /*
 328  *-----------------------------------------------------------------------------
 329  * directory list drag and drop routines (private)
 330  *-----------------------------------------------------------------------------
 331  */
 332
 333 static void dir_list_set_dnd_data(GtkWidget *widget, GdkDragContext *context,
 334                               GtkSelectionData *selection_data, guint info,
 335                               guint time, gpointer data)
 336 {
 337         gint row = GPOINTER_TO_INT(gtk_object_get_user_data(GTK_OBJECT(dir_clist)));
 338
 339         if (row >= 0)
 340                 {
 341                 gchar *name = gtk_clist_get_row_data(GTK_CLIST(dir_clist), row);
 342                 gchar *new_path;
 343                 gchar *text = NULL;
 344
 345                 if (strcmp(name, ".") == 0)
 346                         new_path = g_strdup(current_path);
 347                 else if (strcmp(name, "..") == 0)
 348                         new_path = remove_level_from_path(current_path);
 349                 else
 350                         {
 351                         if (strcmp(current_path, "/") == 0)
 352                                 new_path = g_strconcat(current_path, name, NULL);
 353                         else
 354                                 new_path = g_strconcat(current_path, "/", name, NULL);
 355                         }
 356
 357
 358                 switch (info)
 359                         {
 360                         case TARGET_URI_LIST:
 361                                 text = g_strconcat("file:", new_path, "\r\n", NULL);
 362                                 break;
 363                         case TARGET_TEXT_PLAIN:
 364                                 text = g_strdup(new_path);
 365                                 break;
 366                         }
 367                 if (text)
 368                         {
 369                         gtk_selection_data_set (selection_data, selection_data->target,
 370                                         8, text, strlen(text));
 371                         g_free(text);
 372                         }
 373                 g_free(new_path);
 374                 }
 375 }
 376
 377 static void dir_clist_set_highlight(gint set)
 378 {
 379         gint row = GPOINTER_TO_INT(gtk_object_get_user_data(GTK_OBJECT(dir_clist)));
 380         if (set)
 381                 {
 382                 gtk_clist_set_background(GTK_CLIST(dir_clist), row,
 383                         &GTK_WIDGET (dir_clist)->style->bg[GTK_STATE_SELECTED]);
 384                 gtk_clist_set_foreground(GTK_CLIST(dir_clist), row,
 385                         &GTK_WIDGET (dir_clist)->style->fg[GTK_STATE_SELECTED]);
 386                 }
 387         else
 388                 {
 389                 gtk_clist_set_background(GTK_CLIST(dir_clist), row, NULL);
 390                 gtk_clist_set_foreground(GTK_CLIST(dir_clist), row, NULL);
 391                 }
 392 }
 393
 394 static void dir_list_drag_begin(GtkWidget *widget, GdkDragContext *context, gpointer data)
 395 {
 396         dir_clist_set_highlight(TRUE);
 397 }
 398
 399 static void dir_list_drag_end(GtkWidget *widget, GdkDragContext *context, gpointer data)
 400 {
 401         dir_clist_set_highlight(FALSE);
 402
 403         if (context->action == GDK_ACTION_MOVE)
 404                 {
 405                 filelist_refresh();
 406                 }
 407 }
 408
 409 /*
 410  *-----------------------------------------------------------------------------
 411  * drag and drop initialization (public)
 412  *-----------------------------------------------------------------------------
 413  */
 414
 415 void init_dnd()
 416 {
 417         /* dir clist */
 418         gtk_drag_source_set(dir_clist, GDK_BUTTON2_MASK,
 419                                 file_drag_types, n_file_drag_types, GDK_ACTION_COPY | GDK_ACTION_MOVE | GDK_ACTION_LINK);
 420         gtk_signal_connect(GTK_OBJECT(dir_clist), "drag_begin",
 421                                 dir_list_drag_begin, NULL);
 422         gtk_signal_connect(GTK_OBJECT(dir_clist), "drag_data_get",
 423                                 dir_list_set_dnd_data, NULL);
 424         gtk_signal_connect(GTK_OBJECT(dir_clist), "drag_end",
 425                                 dir_list_drag_end, NULL);
 426
 427         /* file clist */
 428         gtk_drag_source_set(file_clist, GDK_BUTTON2_MASK,
 429                                 file_drag_types, n_file_drag_types, GDK_ACTION_COPY | GDK_ACTION_MOVE | GDK_ACTION_LINK);
 430         gtk_signal_connect(GTK_OBJECT(file_clist), "drag_begin",
 431                                 file_list_drag_begin, NULL);
 432         gtk_signal_connect(GTK_OBJECT(file_clist), "drag_data_get",
 433                                 file_list_set_dnd_data, NULL);
 434         gtk_signal_connect(GTK_OBJECT(file_clist), "drag_end",
 435                                 file_list_drag_end, NULL);
 436
 437         /* image */
 438         image_dnd_init(main_image);
 439 }
 440
 441