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

   1
   2 #include "gtktexttagtable.h"
   3 #include "gtksignal.h"
   4
   5 #include <stdlib.h>
   6
   7 enum {
   8   TAG_CHANGED,
   9   TAG_ADDED,
  10   TAG_REMOVED,
  11   LAST_SIGNAL
  12 };
  13
  14 enum {
  15   LAST_ARG
  16 };
  17
  18 static void gtk_text_tag_table_init (GtkTextTagTable *table);
  19 static void gtk_text_tag_table_class_init (GtkTextTagTableClass *klass);
  20 static void gtk_text_tag_table_destroy (GtkObject *object);
  21 static void gtk_text_tag_table_finalize (GObject *object);
  22 static void gtk_text_tag_table_set_arg (GtkObject *object, GtkArg *arg, guint arg_id);
  23 static void gtk_text_tag_table_get_arg (GtkObject *object, GtkArg *arg, guint arg_id);
  24
  25 static GtkObjectClass *parent_class = NULL;
  26 static guint signals[LAST_SIGNAL] = { 0 };
  27
  28 GtkType
  29 gtk_text_tag_table_get_type (void)
  30 {
  31   static GtkType our_type = 0;
  32
  33   if (our_type == 0)
  34     {
  35       static const GtkTypeInfo our_info =
  36       {
  37         "GtkTextTagTable",
  38         sizeof (GtkTextTagTable),
  39         sizeof (GtkTextTagTableClass),
  40         (GtkClassInitFunc) gtk_text_tag_table_class_init,
  41         (GtkObjectInitFunc) gtk_text_tag_table_init,
  42         /* reserved_1 */ NULL,
  43         /* reserved_2 */ NULL,
  44         (GtkClassInitFunc) NULL
  45       };
  46
  47       our_type = gtk_type_unique (GTK_TYPE_OBJECT, &our_info);
  48     }
  49
  50   return our_type;
  51 }
  52
  53 static void
  54 gtk_text_tag_table_class_init (GtkTextTagTableClass *klass)
  55 {
  56   GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
  57   GtkObjectClass *object_class = GTK_OBJECT_CLASS (klass);
  58
  59   parent_class = gtk_type_class (GTK_TYPE_OBJECT);
  60
  61   signals[TAG_CHANGED] =
  62     gtk_signal_new ("tag_changed",
  63                     GTK_RUN_LAST,
  64                     GTK_CLASS_TYPE (object_class),
  65                     GTK_SIGNAL_OFFSET (GtkTextTagTableClass, tag_changed),
  66                     gtk_marshal_VOID__POINTER_BOOLEAN,
  67                     GTK_TYPE_NONE,
  68                     2,
  69                     GTK_TYPE_OBJECT,
  70                     GTK_TYPE_BOOL);
  71
  72   signals[TAG_ADDED] =
  73     gtk_signal_new ("tag_added",
  74                     GTK_RUN_LAST,
  75                     GTK_CLASS_TYPE (object_class),
  76                     GTK_SIGNAL_OFFSET (GtkTextTagTableClass, tag_added),
  77                     gtk_marshal_VOID__POINTER,
  78                     GTK_TYPE_NONE,
  79                     1,
  80                     GTK_TYPE_OBJECT);
  81
  82   signals[TAG_REMOVED] =
  83     gtk_signal_new ("tag_removed",
  84                     GTK_RUN_LAST,
  85                     GTK_CLASS_TYPE (object_class),
  86                     GTK_SIGNAL_OFFSET (GtkTextTagTableClass, tag_removed),
  87                     gtk_marshal_VOID__POINTER,
  88                     GTK_TYPE_NONE,
  89                     1,
  90                     GTK_TYPE_OBJECT);
  91
  92
  93   gtk_object_class_add_signals (object_class, signals, LAST_SIGNAL);
  94
  95   object_class->set_arg = gtk_text_tag_table_set_arg;
  96   object_class->get_arg = gtk_text_tag_table_get_arg;
  97
  98   object_class->destroy = gtk_text_tag_table_destroy;
  99   gobject_class->finalize = gtk_text_tag_table_finalize;
 100 }
 101
 102 void
 103 gtk_text_tag_table_init (GtkTextTagTable *table)
 104 {
 105   table->hash = g_hash_table_new (g_str_hash, g_str_equal);
 106 }
 107
 108 GtkTextTagTable*
 109 gtk_text_tag_table_new (void)
 110 {
 111   GtkTextTagTable *table;
 112
 113   table = GTK_TEXT_TAG_TABLE (gtk_type_new (gtk_text_tag_table_get_type ()));
 114
 115   return table;
 116 }
 117
 118 static void
 119 gtk_text_tag_table_destroy (GtkObject *object)
 120 {
 121   GtkTextTagTable *table;
 122
 123   table = GTK_TEXT_TAG_TABLE (object);
 124
 125   (* GTK_OBJECT_CLASS (parent_class)->destroy) (object);
 126 }
 127
 128 static void
 129 foreach_unref (GtkTextTag *tag, gpointer data)
 130 {
 131   /* We don't want to emit the remove signal here; so we just unparent
 132    * and unref the tag.
 133    */
 134
 135   tag->table = NULL;
 136   g_object_unref (G_OBJECT (tag));
 137 }
 138
 139 static void
 140 gtk_text_tag_table_finalize (GObject *object)
 141 {
 142   GtkTextTagTable *table;
 143
 144   table = GTK_TEXT_TAG_TABLE (object);
 145
 146   gtk_text_tag_table_foreach (table, foreach_unref, NULL);
 147
 148   g_hash_table_destroy (table->hash);
 149   g_slist_free (table->anonymous);
 150
 151   (* G_OBJECT_CLASS (parent_class)->finalize) (object);
 152 }
 153
 154 static void
 155 gtk_text_tag_table_set_arg (GtkObject *object, GtkArg *arg, guint arg_id)
 156 {
 157   GtkTextTagTable *table;
 158
 159   table = GTK_TEXT_TAG_TABLE (object);
 160
 161   switch (arg_id)
 162     {
 163
 164     default:
 165       g_assert_not_reached ();
 166       break;
 167     }
 168 }
 169
 170 static void
 171 gtk_text_tag_table_get_arg (GtkObject *object, GtkArg *arg, guint arg_id)
 172 {
 173   GtkTextTagTable *table;
 174
 175   table = GTK_TEXT_TAG_TABLE (object);
 176
 177   switch (arg_id)
 178     {
 179
 180     default:
 181       arg->type = GTK_TYPE_INVALID;
 182       break;
 183     }
 184 }
 185
 186 void
 187 gtk_text_tag_table_add (GtkTextTagTable *table, GtkTextTag *tag)
 188 {
 189   guint size;
 190
 191   g_return_if_fail (GTK_IS_TEXT_TAG_TABLE (table));
 192   g_return_if_fail (GTK_IS_TEXT_TAG (tag));
 193   g_return_if_fail (tag->name == NULL ||
 194                     g_hash_table_lookup (table->hash, tag->name) == NULL);
 195   g_return_if_fail (tag->table == NULL);
 196
 197   gtk_object_ref (GTK_OBJECT (tag));
 198   gtk_object_sink (GTK_OBJECT (tag));
 199
 200   if (tag->name)
 201     g_hash_table_insert (table->hash, tag->name, tag);
 202   else
 203     {
 204       table->anonymous = g_slist_prepend (table->anonymous, tag);
 205       table->anon_count += 1;
 206     }
 207
 208   tag->table = table;
 209
 210   /* We get the highest tag priority, as the most-recently-added
 211      tag. Note that we do NOT use gtk_text_tag_set_priority,
 212      as it assumes the tag is already in the table. */
 213   size = gtk_text_tag_table_size (table);
 214   g_assert (size > 0);
 215   tag->priority = size - 1;
 216
 217   gtk_signal_emit (GTK_OBJECT (table), signals[TAG_ADDED], tag);
 218 }
 219
 220 GtkTextTag*
 221 gtk_text_tag_table_lookup (GtkTextTagTable *table, const gchar *name)
 222 {
 223   g_return_val_if_fail (GTK_IS_TEXT_TAG_TABLE (table), NULL);
 224   g_return_val_if_fail (name != NULL, NULL);
 225
 226   return g_hash_table_lookup (table->hash, name);
 227 }
 228
 229 void
 230 gtk_text_tag_table_remove (GtkTextTagTable *table, GtkTextTag *tag)
 231 {
 232   g_return_if_fail (GTK_IS_TEXT_TAG_TABLE (table));
 233   g_return_if_fail (GTK_IS_TEXT_TAG (tag));
 234   g_return_if_fail (tag->table == table);
 235
 236   /* Set ourselves to the highest priority; this means
 237      when we're removed, there won't be any gaps in the
 238      priorities of the tags in the table. */
 239   gtk_text_tag_set_priority (tag, gtk_text_tag_table_size (table) - 1);
 240
 241   tag->table = NULL;
 242
 243   if (tag->name)
 244     g_hash_table_remove (table->hash, tag->name);
 245   else
 246     {
 247       table->anonymous = g_slist_remove (table->anonymous, tag);
 248       table->anon_count -= 1;
 249     }
 250
 251   gtk_signal_emit (GTK_OBJECT (table), signals[TAG_REMOVED], tag);
 252
 253   gtk_object_unref (GTK_OBJECT (tag));
 254 }
 255
 256 struct ForeachData
 257 {
 258   GtkTextTagTableForeach func;
 259   gpointer data;
 260 };
 261
 262 static void
 263 hash_foreach (gpointer key, gpointer value, gpointer data)
 264 {
 265   struct ForeachData *fd = data;
 266
 267   g_return_if_fail (GTK_IS_TEXT_TAG (value));
 268
 269   (* fd->func) (value, fd->data);
 270 }
 271
 272 static void
 273 list_foreach (gpointer data, gpointer user_data)
 274 {
 275   struct ForeachData *fd = user_data;
 276
 277   g_return_if_fail (GTK_IS_TEXT_TAG (data));
 278
 279   (* fd->func) (data, fd->data);
 280 }
 281
 282 void
 283 gtk_text_tag_table_foreach (GtkTextTagTable       *table,
 284                             GtkTextTagTableForeach func,
 285                             gpointer               data)
 286 {
 287   struct ForeachData d;
 288
 289   g_return_if_fail (GTK_IS_TEXT_TAG_TABLE (table));
 290   g_return_if_fail (func != NULL);
 291
 292   d.func = func;
 293   d.data = data;
 294
 295   g_hash_table_foreach (table->hash, hash_foreach, &d);
 296   g_slist_foreach (table->anonymous, list_foreach, &d);
 297 }
 298
 299 guint
 300 gtk_text_tag_table_size (GtkTextTagTable *table)
 301 {
 302   g_return_val_if_fail (GTK_IS_TEXT_TAG_TABLE (table), 0);
 303
 304   return g_hash_table_size (table->hash) + table->anon_count;
 305 }