From dd7595a3475407a7fa96a97393bae8c5220e8762 Mon Sep 17 00:00:00 2001 From: David Walter Seikel Date: Wed, 4 Jan 2012 18:41:13 +1000 Subject: Add the base Enlightenment Foundation Libraries - eina, eet, evas, ecore, embryo, and edje. Note that embryo wont be used, but I'm not sure yet if you can build edje without it. --- .../lib/engines/common/language/evas_bidi_utils.h | 157 +++++++++++++++++++++ 1 file changed, 157 insertions(+) create mode 100644 libraries/evas/src/lib/engines/common/language/evas_bidi_utils.h (limited to 'libraries/evas/src/lib/engines/common/language/evas_bidi_utils.h') diff --git a/libraries/evas/src/lib/engines/common/language/evas_bidi_utils.h b/libraries/evas/src/lib/engines/common/language/evas_bidi_utils.h new file mode 100644 index 0000000..f1a374b --- /dev/null +++ b/libraries/evas/src/lib/engines/common/language/evas_bidi_utils.h @@ -0,0 +1,157 @@ +#ifndef _EVAS_BIDI_UTILS +#define _EVAS_BIDI_UTILS + +/** + * @internal + * @addtogroup Evas_Utils + * + * @{ + */ +/** + * @internal + * @defgroup Evas_BiDi Evas BiDi utility functions + * + * This set of functions and types helps evas handle BiDi strings correctly. + * @todo Document types, structures and macros. + * + * @{ + */ +#ifdef HAVE_CONFIG_H +# include "config.h" +#endif + +#ifdef HAVE_FRIBIDI +# define USE_FRIBIDI +# define BIDI_SUPPORT +#endif + +#include + +#ifdef USE_FRIBIDI +# include +#endif + +/* abstract fribidi - we statically define sizes here because otherwise we would + * have to ifdef everywhere (because function decorations may change with/without + * bidi support) + * These types should only be passed as pointers! i.e do not directely use any of + * these types in function declarations. Defining as void should help ensuring that. + */ + +/* Evas_BiDi_Direction is defined in evas.h */ + +#ifdef USE_FRIBIDI +# define _EVAS_BIDI_TYPEDEF(type) \ + typedef FriBidi ## type EvasBiDi ## type +#else +# define _EVAS_BIDI_TYPEDEF(type) \ + typedef void EvasBiDi ## type +#endif + +#if 0 /* We are using Eina_Unicode instead */ +_EVAS_BIDI_TYPEDEF(Char); +#endif +_EVAS_BIDI_TYPEDEF(CharType); +_EVAS_BIDI_TYPEDEF(ParType); +_EVAS_BIDI_TYPEDEF(StrIndex); +_EVAS_BIDI_TYPEDEF(Level); +_EVAS_BIDI_TYPEDEF(JoiningType); + +typedef struct _Evas_BiDi_Paragraph_Props Evas_BiDi_Paragraph_Props; +typedef struct _Evas_BiDi_Props Evas_BiDi_Props; + +/* This structure defines a set of properties of a BiDi string. In case of a + * non-bidi string, all values should be NULL. + * To check if a structure describes a bidi string or not, use the macro + * EVAS_BIDI_IS_BIDI_PROP. RTL-only strings are also treated as bidi ATM. + */ +struct _Evas_BiDi_Paragraph_Props { + EvasBiDiCharType *char_types; /* BiDi char types */ + EvasBiDiLevel *embedding_levels; /* BiDi embedding levels */ + int refcount; /* The number of references to this object */ +#ifdef USE_FRIBIDI + EvasBiDiParType direction; +#endif +}; + +#include "Evas.h" +struct _Evas_BiDi_Props +{ + Evas_BiDi_Direction dir; +}; + + + +#ifdef USE_FRIBIDI + +#define EVAS_BIDI_PARAGRAPH_NEUTRAL FRIBIDI_PAR_ON +#define EVAS_BIDI_PARAGRAPH_LTR FRIBIDI_PAR_LTR +#define EVAS_BIDI_PARAGRAPH_RTL FRIBIDI_PAR_RTL +#define EVAS_BIDI_PARAGRAPH_WLTR FRIBIDI_PAR_WLTR +#define EVAS_BIDI_PARAGRAPH_WRTL FRIBIDI_PAR_WRTL + +#define EVAS_BIDI_PARAGRAPH_DIRECTION_IS_RTL(x) \ + (((x) && \ + ((x->direction == EVAS_BIDI_PARAGRAPH_RTL) || \ + (x->direction == EVAS_BIDI_PARAGRAPH_WRTL))) ? \ + EINA_TRUE : EINA_FALSE) + + +# define evas_bidi_position_visual_to_logical(list, position) \ + (list) ? list[position] : position; + +EvasBiDiStrIndex +evas_bidi_position_logical_to_visual(EvasBiDiStrIndex *v_to_l, int len, EvasBiDiStrIndex position); + +EvasBiDiStrIndex +evas_bidi_position_reverse(const Evas_BiDi_Props *props, int len, EvasBiDiStrIndex position); + +Eina_Bool +evas_bidi_is_rtl_str(const Eina_Unicode *str); + +Eina_Bool +evas_bidi_is_rtl_char(const Evas_BiDi_Paragraph_Props *bidi_props, size_t start, EvasBiDiStrIndex index); + +int +evas_bidi_end_of_run_get(const Evas_BiDi_Paragraph_Props *bidi_props, size_t start, int len); + +Eina_Bool +evas_bidi_props_reorder_line(Eina_Unicode *eina_ustr, size_t start, size_t len, const Evas_BiDi_Paragraph_Props *props, EvasBiDiStrIndex **_v_to_l); + +Evas_BiDi_Paragraph_Props * +evas_bidi_paragraph_props_get(const Eina_Unicode *eina_ustr, size_t len, int *segment_idxs) EINA_ARG_NONNULL(1) EINA_MALLOC EINA_WARN_UNUSED_RESULT; + +void +evas_bidi_props_copy_and_ref(const Evas_BiDi_Props *src, Evas_BiDi_Props *dst); + +EAPI Eina_Bool +evas_bidi_shape_string(Eina_Unicode *eina_ustr, const Evas_BiDi_Paragraph_Props *bidi_props, size_t start, size_t len); + +void +evas_bidi_props_clean(Evas_BiDi_Props *intl_props) EINA_ARG_NONNULL(1); + +void +evas_bidi_paragraph_props_clean(Evas_BiDi_Paragraph_Props *bidi_props) EINA_ARG_NONNULL(1); + +Evas_BiDi_Paragraph_Props * +evas_bidi_paragraph_props_ref(Evas_BiDi_Paragraph_Props *bidi_props) EINA_ARG_NONNULL(1); + +void +evas_bidi_paragraph_props_unref(Evas_BiDi_Paragraph_Props *bidi_props) EINA_ARG_NONNULL(1); + +Evas_BiDi_Paragraph_Props * +evas_bidi_paragraph_props_new(void) EINA_MALLOC EINA_WARN_UNUSED_RESULT; + +int * +evas_bidi_segment_idxs_get(const Eina_Unicode *str, const char *delim) EINA_ARG_NONNULL(1, 2) EINA_WARN_UNUSED_RESULT EINA_MALLOC; + +#endif +/** + * @} + */ +/** + * @} + */ + +#endif + -- cgit v1.1