diff options
Diffstat (limited to 'pango/pango-types.h')
| -rw-r--r-- | pango/pango-types.h | 46 |
1 files changed, 41 insertions, 5 deletions
diff --git a/pango/pango-types.h b/pango/pango-types.h index 993402aa..6f515ead 100644 --- a/pango/pango-types.h +++ b/pango/pango-types.h @@ -65,15 +65,45 @@ struct _PangoRectangle #define PANGO_LBEARING(rect) ((rect).x) #define PANGO_RBEARING(rect) ((rect).x + (rect).width) -/* Information about a segment of text with a consistent - * shaping/language engine and bidirectional level - */ - +/** + * PangoDirection: + * @PANGO_DIRECTION_LTR: A strong left-to-right direction + * @PANGO_DIRECTION_RTL: A strong right-to-left direction + * @PANGO_DIRECTION_TTB_LTR: Deprecated value; treated the + * same as %PANGO_DIRECTION_RTL. + * @PANGO_DIRECTION_TTB_RTL: Deprecated value; treated the + * same as PANGO_DIRECTION_LTR + * @PANGO_DIRECTION_WEAK_LTR: A weak left-to-right direction + * @PANGO_DIRECTION_WEAK_RTL: A weak right-to-left direction + * @PANGO_DIRECTION_NEUTRAL: No direction specified + * + * The #PangoDirection type represents a direction in the + * Unicode bidirectional algorithm; not every value in this + * enumeration makes sense for every usage of #PangoDirection; + * for example, the return value of pango_unichar_direction() + * and pango_find_base_direction() cannot be %PANGO_DIRECTION_WEAK_LTR + * or %PANGO_DIRECTION_WEAK_RTL, since every character is either + * neutral or has a strong direction; on the other hand + * %PANGO_DIRECTION_NEUTRAL doesn't make sense to pass + * to pango_log2vis_get_embedding_levels(). + * + * The %PANGO_DIRECTION_TTB_LTR, %PANGO_DIRECTION_TTB_RTL + * values come from an earlier interpretation of this + * enumeration as the writing direction of a block of + * text and are no longer used; See the Text module of the + * CSS3 spec for how vertical text is planned to be handled + * in a future version of Pango. The explanation of why + * %PANGO_DIRECTION_TTB_LTR is treated as %PANGO_DIRECTION_RTL + * can be found there as well. + **/ typedef enum { PANGO_DIRECTION_LTR, PANGO_DIRECTION_RTL, PANGO_DIRECTION_TTB_LTR, - PANGO_DIRECTION_TTB_RTL + PANGO_DIRECTION_TTB_RTL, + PANGO_DIRECTION_WEAK_LTR, + PANGO_DIRECTION_WEAK_RTL, + PANGO_DIRECTION_NEUTRAL } PangoDirection; #define PANGO_TYPE_LANGUAGE (pango_language_get_type ()) @@ -85,6 +115,12 @@ PangoLanguage *pango_language_from_string (const char *language); gboolean pango_language_matches (PangoLanguage *language, const char *range_list); +gboolean pango_get_mirror_char (gunichar ch, + gunichar *mirrored_ch); +PangoDirection pango_unichar_direction (gunichar ch); +PangoDirection pango_find_base_dir (const gchar *text, + gint length); + G_END_DECLS #endif /* __PANGO_TYPES_H__ */ |