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

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