Pileus Git - ~andy/gtk/blob - gtk/gtktexttagtable.c

   1
   2 #include <config.h>
   3 #include "gtktexttagtable.h"
   4 #include "gtkmarshalers.h"
   5 #include "gtktextbuffer.h" /* just for the lame notify_will_remove_tag hack */
   6
   7 #include <stdlib.h>
   8
   9 enum {
  10   TAG_CHANGED,
  11   TAG_ADDED,
  12   TAG_REMOVED,
  13   LAST_SIGNAL
  14 };
  15
  16 enum {
  17   LAST_ARG
  18 };
  19
  20 static void gtk_text_tag_table_init         (GtkTextTagTable      *table);
  21 static void gtk_text_tag_table_class_init   (GtkTextTagTableClass *klass);
  22 static void gtk_text_tag_table_finalize     (GObject              *object);
  23 static void gtk_text_tag_table_set_property (GObject              *object,
  24                                              guint                 prop_id,
  25                                              const GValue         *value,
  26                                              GParamSpec           *pspec);
  27 static void gtk_text_tag_table_get_property (GObject              *object,
  28                                              guint                 prop_id,
  29                                              GValue               *value,
  30                                              GParamSpec           *pspec);
  31
  32 static GObjectClass *parent_class = NULL;
  33 static guint signals[LAST_SIGNAL] = { 0 };
  34
  35 GType
  36 gtk_text_tag_table_get_type (void)
  37 {
  38   static GType our_type = 0;
  39
  40   if (our_type == 0)
  41     {
  42       static const GTypeInfo our_info =
  43       {
  44         sizeof (GtkTextTagTableClass),
  45         (GBaseInitFunc) NULL,
  46         (GBaseFinalizeFunc) NULL,
  47         (GClassInitFunc) gtk_text_tag_table_class_init,
  48         NULL,           /* class_finalize */
  49         NULL,           /* class_data */
  50         sizeof (GtkTextTagTable),
  51         0,              /* n_preallocs */
  52         (GInstanceInitFunc) gtk_text_tag_table_init
  53       };
  54
  55       our_type = g_type_register_static (G_TYPE_OBJECT, "GtkTextTagTable",
  56                                          &our_info, 0);
  57     }
  58
  59   return our_type;
  60 }
  61
  62 static void
  63 gtk_text_tag_table_class_init (GtkTextTagTableClass *klass)
  64 {
  65   GObjectClass *object_class = G_OBJECT_CLASS (klass);
  66
  67   parent_class = g_type_class_peek_parent (klass);
  68
  69   object_class->set_property = gtk_text_tag_table_set_property;
  70   object_class->get_property = gtk_text_tag_table_get_property;
  71
  72   object_class->finalize = gtk_text_tag_table_finalize;
  73
  74   signals[TAG_CHANGED] =
  75     g_signal_new ("tag_changed",
  76                   G_OBJECT_CLASS_TYPE (object_class),
  77                   G_SIGNAL_RUN_LAST,
  78                   G_STRUCT_OFFSET (GtkTextTagTableClass, tag_changed),
  79                   NULL, NULL,
  80                   _gtk_marshal_VOID__OBJECT_BOOLEAN,
  81                   G_TYPE_NONE,
  82                   2,
  83                   GTK_TYPE_TEXT_TAG,
  84                   G_TYPE_BOOLEAN);
  85
  86   signals[TAG_ADDED] =
  87     g_signal_new ("tag_added",
  88                   G_OBJECT_CLASS_TYPE (object_class),
  89                   G_SIGNAL_RUN_LAST,
  90                   G_STRUCT_OFFSET (GtkTextTagTableClass, tag_added),
  91                   NULL, NULL,
  92                   _gtk_marshal_VOID__OBJECT,
  93                   G_TYPE_NONE,
  94                   1,
  95                   GTK_TYPE_TEXT_TAG);
  96
  97   signals[TAG_REMOVED] =
  98     g_signal_new ("tag_removed",
  99                   G_OBJECT_CLASS_TYPE (object_class),
 100                   G_SIGNAL_RUN_LAST,
 101                   G_STRUCT_OFFSET (GtkTextTagTableClass, tag_removed),
 102                   NULL, NULL,
 103                   _gtk_marshal_VOID__OBJECT,
 104                   G_TYPE_NONE,
 105                   1,
 106                   GTK_TYPE_TEXT_TAG);
 107 }
 108
 109 static void
 110 gtk_text_tag_table_init (GtkTextTagTable *table)
 111 {
 112   table->hash = g_hash_table_new (g_str_hash, g_str_equal);
 113 }
 114
 115 /**
 116  * gtk_text_tag_table_new:
 117  *
 118  * Creates a new #GtkTextTagTable. The table contains no tags by
 119  * default.
 120  *
 121  * Return value: a new #GtkTextTagTable
 122  **/
 123 GtkTextTagTable*
 124 gtk_text_tag_table_new (void)
 125 {
 126   GtkTextTagTable *table;
 127
 128   table = g_object_new (GTK_TYPE_TEXT_TAG_TABLE, NULL);
 129
 130   return table;
 131 }
 132
 133 static void
 134 foreach_unref (GtkTextTag *tag, gpointer data)
 135 {
 136   GSList *tmp;
 137
 138   /* We don't want to emit the remove signal here; so we just unparent
 139    * and unref the tag.
 140    */
 141
 142   tmp = tag->table->buffers;
 143   while (tmp != NULL)
 144     {
 145       _gtk_text_buffer_notify_will_remove_tag (GTK_TEXT_BUFFER (tmp->data),
 146                                                tag);
 147
 148       tmp = tmp->next;
 149     }
 150
 151   tag->table = NULL;
 152   g_object_unref (tag);
 153 }
 154
 155 static void
 156 gtk_text_tag_table_finalize (GObject *object)
 157 {
 158   GtkTextTagTable *table;
 159
 160   table = GTK_TEXT_TAG_TABLE (object);
 161
 162   gtk_text_tag_table_foreach (table, foreach_unref, NULL);
 163
 164   g_hash_table_destroy (table->hash);
 165   g_slist_free (table->anonymous);
 166
 167   g_slist_free (table->buffers);
 168
 169   (* G_OBJECT_CLASS (parent_class)->finalize) (object);
 170 }
 171 static void
 172 gtk_text_tag_table_set_property (GObject      *object,
 173                                  guint         prop_id,
 174                                  const GValue *value,
 175                                  GParamSpec   *pspec)
 176 {
 177   GtkTextTagTable *table;
 178
 179   table = GTK_TEXT_TAG_TABLE (object);
 180
 181   switch (prop_id)
 182     {
 183
 184     default:
 185       G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
 186       break;
 187     }
 188 }
 189
 190
 191 static void
 192 gtk_text_tag_table_get_property (GObject      *object,
 193                                  guint         prop_id,
 194                                  GValue       *value,
 195                                  GParamSpec   *pspec)
 196 {
 197   GtkTextTagTable *table;
 198
 199   table = GTK_TEXT_TAG_TABLE (object);
 200
 201   switch (prop_id)
 202     {
 203
 204     default:
 205       G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
 206       break;
 207     }
 208 }
 209
 210 /**
 211  * gtk_text_tag_table_add:
 212  * @table: a #GtkTextTagTable
 213  * @tag: a #GtkTextTag
 214  *
 215  * Add a tag to the table. The tag is assigned the highest priority
 216  * in the table.
 217  *
 218  * @tag must not be in a tag table already, and may not have
 219  * the same name as an already-added tag.
 220  **/
 221 void
 222 gtk_text_tag_table_add (GtkTextTagTable *table,
 223                         GtkTextTag      *tag)
 224 {
 225   guint size;
 226
 227   g_return_if_fail (GTK_IS_TEXT_TAG_TABLE (table));
 228   g_return_if_fail (GTK_IS_TEXT_TAG (tag));
 229   g_return_if_fail (tag->table == NULL);
 230
 231   if (tag->name && g_hash_table_lookup (table->hash, tag->name))
 232     {
 233       g_warning ("A tag named '%s' is already in the tag table.",
 234                  tag->name);
 235       return;
 236     }
 237
 238   g_object_ref (tag);
 239
 240   if (tag->name)
 241     g_hash_table_insert (table->hash, tag->name, tag);
 242   else
 243     {
 244       table->anonymous = g_slist_prepend (table->anonymous, tag);
 245       table->anon_count += 1;
 246     }
 247
 248   tag->table = table;
 249
 250   /* We get the highest tag priority, as the most-recently-added
 251      tag. Note that we do NOT use gtk_text_tag_set_priority,
 252      as it assumes the tag is already in the table. */
 253   size = gtk_text_tag_table_get_size (table);
 254   g_assert (size > 0);
 255   tag->priority = size - 1;
 256
 257   g_signal_emit (table, signals[TAG_ADDED], 0, tag);
 258 }
 259
 260 /**
 261  * gtk_text_tag_table_lookup:
 262  * @table: a #GtkTextTagTable
 263  * @name: name of a tag
 264  *
 265  * Look up a named tag.
 266  *
 267  * Return value: The tag, or %NULL if none by that name is in the table.
 268  **/
 269 GtkTextTag*
 270 gtk_text_tag_table_lookup (GtkTextTagTable *table,
 271                            const gchar     *name)
 272 {
 273   g_return_val_if_fail (GTK_IS_TEXT_TAG_TABLE (table), NULL);
 274   g_return_val_if_fail (name != NULL, NULL);
 275
 276   return g_hash_table_lookup (table->hash, name);
 277 }
 278
 279 /**
 280  * gtk_text_tag_table_remove:
 281  * @table: a #GtkTextTagTable
 282  * @tag: a #GtkTextTag
 283  *
 284  * Remove a tag from the table. This will remove the table's
 285  * reference to the tag, so be careful - the tag will end
 286  * up destroyed if you don't have a reference to it.
 287  **/
 288 void
 289 gtk_text_tag_table_remove (GtkTextTagTable *table,
 290                            GtkTextTag      *tag)
 291 {
 292   GSList *tmp;
 293
 294   g_return_if_fail (GTK_IS_TEXT_TAG_TABLE (table));
 295   g_return_if_fail (GTK_IS_TEXT_TAG (tag));
 296   g_return_if_fail (tag->table == table);
 297
 298   /* Our little bad hack to be sure buffers don't still have the tag
 299    * applied to text in the buffer
 300    */
 301   tmp = table->buffers;
 302   while (tmp != NULL)
 303     {
 304       _gtk_text_buffer_notify_will_remove_tag (GTK_TEXT_BUFFER (tmp->data),
 305                                                tag);
 306
 307       tmp = tmp->next;
 308     }
 309
 310   /* Set ourselves to the highest priority; this means
 311      when we're removed, there won't be any gaps in the
 312      priorities of the tags in the table. */
 313   gtk_text_tag_set_priority (tag, gtk_text_tag_table_get_size (table) - 1);
 314
 315   tag->table = NULL;
 316
 317   if (tag->name)
 318     g_hash_table_remove (table->hash, tag->name);
 319   else
 320     {
 321       table->anonymous = g_slist_remove (table->anonymous, tag);
 322       table->anon_count -= 1;
 323     }
 324
 325   g_signal_emit (table, signals[TAG_REMOVED], 0, tag);
 326
 327   g_object_unref (tag);
 328 }
 329
 330 struct ForeachData
 331 {
 332   GtkTextTagTableForeach func;
 333   gpointer data;
 334 };
 335
 336 static void
 337 hash_foreach (gpointer key, gpointer value, gpointer data)
 338 {
 339   struct ForeachData *fd = data;
 340
 341   g_return_if_fail (GTK_IS_TEXT_TAG (value));
 342
 343   (* fd->func) (value, fd->data);
 344 }
 345
 346 static void
 347 list_foreach (gpointer data, gpointer user_data)
 348 {
 349   struct ForeachData *fd = user_data;
 350
 351   g_return_if_fail (GTK_IS_TEXT_TAG (data));
 352
 353   (* fd->func) (data, fd->data);
 354 }
 355
 356 /**
 357  * gtk_text_tag_table_foreach:
 358  * @table: a #GtkTextTagTable
 359  * @func: a function to call on each tag
 360  * @data: user data
 361  *
 362  * Calls @func on each tag in @table, with user data @data.
 363  *
 364  **/
 365 void
 366 gtk_text_tag_table_foreach (GtkTextTagTable       *table,
 367                             GtkTextTagTableForeach func,
 368                             gpointer               data)
 369 {
 370   struct ForeachData d;
 371
 372   g_return_if_fail (GTK_IS_TEXT_TAG_TABLE (table));
 373   g_return_if_fail (func != NULL);
 374
 375   d.func = func;
 376   d.data = data;
 377
 378   g_hash_table_foreach (table->hash, hash_foreach, &d);
 379   g_slist_foreach (table->anonymous, list_foreach, &d);
 380 }
 381
 382 /**
 383  * gtk_text_tag_table_get_size:
 384  * @table: a #GtkTextTagTable
 385  *
 386  * Returns the size of the table (number of tags)
 387  *
 388  * Return value: number of tags in @table
 389  **/
 390 gint
 391 gtk_text_tag_table_get_size (GtkTextTagTable *table)
 392 {
 393   g_return_val_if_fail (GTK_IS_TEXT_TAG_TABLE (table), 0);
 394
 395   return g_hash_table_size (table->hash) + table->anon_count;
 396 }
 397
 398 void
 399 _gtk_text_tag_table_add_buffer (GtkTextTagTable *table,
 400                                 gpointer         buffer)
 401 {
 402   g_return_if_fail (GTK_IS_TEXT_TAG_TABLE (table));
 403
 404   table->buffers = g_slist_prepend (table->buffers, buffer);
 405 }
 406
 407 static void
 408 foreach_remove_tag (GtkTextTag *tag, gpointer data)
 409 {
 410   GtkTextBuffer *buffer;
 411
 412   buffer = GTK_TEXT_BUFFER (data);
 413
 414   _gtk_text_buffer_notify_will_remove_tag (buffer, tag);
 415 }
 416
 417 void
 418 _gtk_text_tag_table_remove_buffer (GtkTextTagTable *table,
 419                                    gpointer         buffer)
 420 {
 421   g_return_if_fail (GTK_IS_TEXT_TAG_TABLE (table));
 422
 423   gtk_text_tag_table_foreach (table, foreach_remove_tag, buffer);
 424
 425   table->buffers = g_slist_remove (table->buffers, buffer);
 426 }