GtkTextTag

struct GtkTextTag
{
  GObject parent_instance;

  GtkTextTagTable *table;

  char *name;                   /* Name of this tag.  This field is actually
                                 * a pointer to the key from the entry in
                                 * tkxt->tagTable, so it needn't be freed
                                 * explicitly. */
  int priority;         /* Priority of this tag within widget.  0
                         * means lowest priority.  Exactly one tag
                         * has each integer value between 0 and
                         * numTags-1. */
  /*
   * Information for displaying text with this tag.  The information
   * belows acts as an override on information specified by lower-priority
   * tags.  If no value is specified, then the next-lower-priority tag
   * on the text determins the value.  The text widget itself provides
   * defaults if no tag specifies an override.
   */

  GtkTextAttributes *values;

  /* Flags for whether a given value is set; if a value is unset, then
   * this tag does not affect it.
   */
  guint bg_color_set : 1;
  guint bg_stipple_set : 1;
  guint fg_color_set : 1;
  guint family_set : 1;
  guint style_set : 1;
  guint variant_set : 1;
  guint weight_set : 1;
  guint stretch_set : 1;
  guint size_set : 1;
  guint fg_stipple_set : 1;
  guint justification_set : 1;
  guint left_margin_set : 1;
  guint indent_set : 1;
  guint rise_set : 1;
  guint strikethrough_set : 1;
  guint right_margin_set : 1;
  guint pixels_above_lines_set : 1;
  guint pixels_below_lines_set : 1;
  guint pixels_inside_wrap_set : 1;
  guint tabs_set : 1;
  guint underline_set : 1;
  guint wrap_mode_set : 1;
  guint bg_full_height_set : 1;
  guint invisible_set : 1;
  guint editable_set : 1;
  guint language_set : 1;
  guint pad1 : 1;
  guint pad2 : 1;
  guint pad3 : 1;
};

struct GtkTextBTreeNode;

struct GtkTextTagTable {
  GObject parent_instance;

  GHashTable *hash;
  GSList *anonymous;
  gint anon_count;
};

typedef enum
{
  GTK_WRAP_NONE,
  GTK_WRAP_CHAR,
  GTK_WRAP_WORD
} GtkWrapMode;

struct GtkTextAttributes
{
  guint refcount;

  GtkTextAppearance appearance;

  GtkJustification justification;
  GtkTextDirection direction;

  /* Individual chunks of this can be set/unset as a group */
  PangoFontDescription font;

  gint left_margin;

  gint indent;  

  gint right_margin;

  gint pixels_above_lines;

  gint pixels_below_lines;

  gint pixels_inside_wrap;

  PangoTabArray *tabs;

  GtkWrapMode wrap_mode;        /* How to handle wrap-around for this tag.
                                 * Must be GTK_WRAPMODE_CHAR,
                                 * GTK_WRAPMODE_NONE, GTK_WRAPMODE_WORD
                                 */

  gchar *language;

  /* hide the text  */
  guint invisible : 1;

  /* Background is fit to full line height rather than
   * baseline +/- ascent/descent (font height)
   */
  guint bg_full_height : 1;

  /* can edit this text */
  guint editable : 1;

  /* colors are allocated etc. */
  guint realized : 1;

  guint pad1 : 1;
  guint pad2 : 1;
  guint pad3 : 1;
  guint pad4 : 1;
};

GtkTextTag* gtk_text_tag_new                (const gchar *name);

gint        gtk_text_tag_get_priority       (GtkTextTag *tag);

void        gtk_text_tag_set_priority       (GtkTextTag *tag,
                                             gint priority);

gint        gtk_text_tag_event              (GtkTextTag *tag,
                                             GObject *event_object,
                                             GdkEvent *event,
                                             const GtkTextIter *iter);

struct GtkTextAppearance
{
  GdkColor bg_color;
  GdkColor fg_color;
  GdkBitmap *bg_stipple;
  GdkBitmap *fg_stipple;

  /* super/subscript rise, can be negative */
  gint rise;
  
  guint underline : 4;          /* PangoUnderline */
  guint strikethrough : 1;

  /* Whether to use background-related values; this is irrelevant for
   * the values struct when in a tag, but is used for the composite
   * values struct; it's true if any of the tags being composited
   * had background stuff set.
   */
  guint draw_bg : 1;
  
  /* These are only used when we are actually laying out and rendering
   * a paragraph; not when a GtkTextAppearance is part of a
   * GtkTextAttributes.
   */
  guint inside_selection : 1;
  guint is_text : 1;
};

GtkTextAttributes* gtk_text_attributes_new  (void);

GtkTextAttributes* gtk_text_attributes_copy (GtkTextAttributes *src);

void        gtk_text_attributes_copy_values (GtkTextAttributes *src,
                                             GtkTextAttributes *dest);

void        gtk_text_attributes_unref       (GtkTextAttributes *values);

void        gtk_text_attributes_ref         (GtkTextAttributes *values);