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_finalize     (GObject              *object);
  21 static void gtk_text_tag_table_set_property (GObject              *object,
  22                                              guint                 prop_id,
  23                                              const GValue         *value,
  24                                              GParamSpec           *pspec,
  25                                              const gchar          *trailer);
  26 static void gtk_text_tag_table_get_property (GObject              *object,
  27                                              guint                 prop_id,
  28                                              GValue               *value,
  29                                              GParamSpec           *pspec,
  30                                              const gchar          *trailer);
  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_newc ("tag_changed",
  78                    G_TYPE_FROM_CLASS (object_class),
  79                    G_SIGNAL_RUN_LAST,
  80                    G_STRUCT_OFFSET (GtkTextTagTableClass, tag_changed),
  81                    NULL,
  82                    gtk_marshal_VOID__OBJECT_BOOLEAN,
  83                    G_TYPE_NONE,
  84                    2,
  85                    G_TYPE_OBJECT,
  86                    G_TYPE_BOOLEAN);
  87
  88   signals[TAG_ADDED] =
  89     g_signal_newc ("tag_added",
  90                    GTK_CLASS_TYPE (object_class),
  91                    G_SIGNAL_RUN_LAST,
  92                    G_STRUCT_OFFSET (GtkTextTagTableClass, tag_added),
  93                    NULL,
  94                    gtk_marshal_VOID__OBJECT,
  95                    GTK_TYPE_NONE,
  96                    1,
  97                    G_TYPE_OBJECT);
  98
  99   signals[TAG_REMOVED] =
 100     g_signal_newc ("tag_removed",
 101                    GTK_CLASS_TYPE (object_class),
 102                    G_SIGNAL_RUN_LAST,
 103                    G_STRUCT_OFFSET (GtkTextTagTableClass, tag_removed),
 104                    NULL,
 105                    gtk_marshal_VOID__OBJECT,
 106                    GTK_TYPE_NONE,
 107                    1,
 108                    G_TYPE_OBJECT);
 109 }
 110
 111 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   /* We don't want to emit the remove signal here; so we just unparent
 139    * and unref the tag.
 140    */
 141
 142   tag->table = NULL;
 143   g_object_unref (G_OBJECT (tag));
 144 }
 145
 146 static void
 147 gtk_text_tag_table_finalize (GObject *object)
 148 {
 149   GtkTextTagTable *table;
 150
 151   table = GTK_TEXT_TAG_TABLE (object);
 152
 153   gtk_text_tag_table_foreach (table, foreach_unref, NULL);
 154
 155   g_hash_table_destroy (table->hash);
 156   g_slist_free (table->anonymous);
 157
 158   (* G_OBJECT_CLASS (parent_class)->finalize) (object);
 159 }
 160 static void
 161 gtk_text_tag_table_set_property (GObject      *object,
 162                                  guint         prop_id,
 163                                  const GValue *value,
 164                                  GParamSpec   *pspec,
 165                                  const gchar  *trailer)
 166 {
 167   GtkTextTagTable *table;
 168
 169   table = GTK_TEXT_TAG_TABLE (object);
 170
 171   switch (prop_id)
 172     {
 173
 174     default:
 175       G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
 176       break;
 177     }
 178 }
 179
 180
 181 static void
 182 gtk_text_tag_table_get_property (GObject      *object,
 183                                  guint         prop_id,
 184                                  GValue       *value,
 185                                  GParamSpec   *pspec,
 186                                  const gchar  *trailer)
 187 {
 188   GtkTextTagTable *table;
 189
 190   table = GTK_TEXT_TAG_TABLE (object);
 191
 192   switch (prop_id)
 193     {
 194
 195     default:
 196       G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
 197       break;
 198     }
 199 }
 200
 201 /**
 202  * gtk_text_tag_table_add:
 203  * @table: a #GtkTextTagTable
 204  * @tag: a #GtkTextTag
 205  *
 206  * Add a tag to the table. The tag is assigned the highest priority
 207  * in the table.
 208  *
 209  **/
 210 void
 211 gtk_text_tag_table_add (GtkTextTagTable *table,
 212                         GtkTextTag      *tag)
 213 {
 214   guint size;
 215
 216   g_return_if_fail (GTK_IS_TEXT_TAG_TABLE (table));
 217   g_return_if_fail (GTK_IS_TEXT_TAG (tag));
 218   g_return_if_fail (tag->name == NULL ||
 219                     g_hash_table_lookup (table->hash, tag->name) == NULL);
 220   g_return_if_fail (tag->table == NULL);
 221
 222   g_object_ref (G_OBJECT (tag));
 223
 224   if (tag->name)
 225     g_hash_table_insert (table->hash, tag->name, tag);
 226   else
 227     {
 228       table->anonymous = g_slist_prepend (table->anonymous, tag);
 229       table->anon_count += 1;
 230     }
 231
 232   tag->table = table;
 233
 234   /* We get the highest tag priority, as the most-recently-added
 235      tag. Note that we do NOT use gtk_text_tag_set_priority,
 236      as it assumes the tag is already in the table. */
 237   size = gtk_text_tag_table_size (table);
 238   g_assert (size > 0);
 239   tag->priority = size - 1;
 240
 241   g_signal_emit (G_OBJECT (table), signals[TAG_ADDED], 0, tag);
 242 }
 243
 244 /**
 245  * gtk_text_tag_table_lookup:
 246  * @table: a #GtkTextTagTable
 247  * @name: name of a tag
 248  *
 249  * Look up a named tag.
 250  *
 251  * Return value: The tag, or %NULL if none by that name is in the table.
 252  **/
 253 GtkTextTag*
 254 gtk_text_tag_table_lookup (GtkTextTagTable *table,
 255                            const gchar     *name)
 256 {
 257   g_return_val_if_fail (GTK_IS_TEXT_TAG_TABLE (table), NULL);
 258   g_return_val_if_fail (name != NULL, NULL);
 259
 260   return g_hash_table_lookup (table->hash, name);
 261 }
 262
 263 /**
 264  * gtk_text_tag_table_remove:
 265  * @table: a #GtkTextTagTable
 266  * @tag: a #GtkTextTag
 267  *
 268  * Remove a tag from the table. This will remove the table's
 269  * reference to the tag, so be careful - the tag will end
 270  * up destroyed if you don't have a reference to it.
 271  **/
 272 void
 273 gtk_text_tag_table_remove (GtkTextTagTable *table,
 274                            GtkTextTag      *tag)
 275 {
 276   g_return_if_fail (GTK_IS_TEXT_TAG_TABLE (table));
 277   g_return_if_fail (GTK_IS_TEXT_TAG (tag));
 278   g_return_if_fail (tag->table == table);
 279
 280   /* Set ourselves to the highest priority; this means
 281      when we're removed, there won't be any gaps in the
 282      priorities of the tags in the table. */
 283   gtk_text_tag_set_priority (tag, gtk_text_tag_table_size (table) - 1);
 284
 285   tag->table = NULL;
 286
 287   if (tag->name)
 288     g_hash_table_remove (table->hash, tag->name);
 289   else
 290     {
 291       table->anonymous = g_slist_remove (table->anonymous, tag);
 292       table->anon_count -= 1;
 293     }
 294
 295   g_signal_emit (G_OBJECT (table), signals[TAG_REMOVED], 0, tag);
 296
 297   g_object_unref (G_OBJECT (tag));
 298 }
 299
 300 struct ForeachData
 301 {
 302   GtkTextTagTableForeach func;
 303   gpointer data;
 304 };
 305
 306 static void
 307 hash_foreach (gpointer key, gpointer value, gpointer data)
 308 {
 309   struct ForeachData *fd = data;
 310
 311   g_return_if_fail (GTK_IS_TEXT_TAG (value));
 312
 313   (* fd->func) (value, fd->data);
 314 }
 315
 316 static void
 317 list_foreach (gpointer data, gpointer user_data)
 318 {
 319   struct ForeachData *fd = user_data;
 320
 321   g_return_if_fail (GTK_IS_TEXT_TAG (data));
 322
 323   (* fd->func) (data, fd->data);
 324 }
 325
 326 /**
 327  * gtk_text_tag_table_foreach:
 328  * @table: a #GtkTextTagTable
 329  * @func: a function to call on each tag
 330  * @data: user data
 331  *
 332  * Calls @func on each tag in @table, with user data @data.
 333  *
 334  **/
 335 void
 336 gtk_text_tag_table_foreach (GtkTextTagTable       *table,
 337                             GtkTextTagTableForeach func,
 338                             gpointer               data)
 339 {
 340   struct ForeachData d;
 341
 342   g_return_if_fail (GTK_IS_TEXT_TAG_TABLE (table));
 343   g_return_if_fail (func != NULL);
 344
 345   d.func = func;
 346   d.data = data;
 347
 348   g_hash_table_foreach (table->hash, hash_foreach, &d);
 349   g_slist_foreach (table->anonymous, list_foreach, &d);
 350 }
 351
 352 /**
 353  * gtk_text_tag_table_size:
 354  * @table: a #GtkTextTagTable
 355  *
 356  * Returns the size of the table (number of tags)
 357  *
 358  * Return value: number of tags in @table
 359  **/
 360 gint
 361 gtk_text_tag_table_size (GtkTextTagTable *table)
 362 {
 363   g_return_val_if_fail (GTK_IS_TEXT_TAG_TABLE (table), 0);
 364
 365   return g_hash_table_size (table->hash) + table->anon_count;
 366 }