forked from enlightenment/efl
158 lines
4.3 KiB
C
158 lines
4.3 KiB
C
#ifndef _EVAS_BIDI_UTILS
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#define _EVAS_BIDI_UTILS
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/**
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* @internal
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* @addtogroup Evas_Utils
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*
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* @{
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*/
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/**
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* @internal
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* @defgroup Evas_BiDi Evas BiDi utility functions
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*
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* This set of functions and types helps evas handle BiDi strings correctly.
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* @todo Document types, structures and macros.
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*
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* @{
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*/
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#ifdef HAVE_CONFIG_H
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# include "config.h"
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#endif
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#ifdef HAVE_FRIBIDI
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# define USE_FRIBIDI
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# define BIDI_SUPPORT
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#endif
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#include <Eina.h>
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#include "evas_common.h"
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#ifdef USE_FRIBIDI
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# include <fribidi/fribidi.h>
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#endif
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/* abstract fribidi - we statically define sizes here because otherwise we would
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* have to ifdef everywhere (because function decorations may change with/without
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* bidi support)
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* These types should only be passed as pointers! i.e do not directely use any of
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* these types in function declarations. Defining as void should help ensuring that.
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*/
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/* Evas_BiDi_Direction is defined in evas.h */
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#ifdef USE_FRIBIDI
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# define _EVAS_BIDI_TYPEDEF(type) \
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typedef FriBidi ## type EvasBiDi ## type
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#else
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# define _EVAS_BIDI_TYPEDEF(type) \
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typedef void EvasBiDi ## type
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#endif
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#if 0 /* We are using Eina_Unicode instead */
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_EVAS_BIDI_TYPEDEF(Char);
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#endif
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_EVAS_BIDI_TYPEDEF(CharType);
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_EVAS_BIDI_TYPEDEF(ParType);
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_EVAS_BIDI_TYPEDEF(StrIndex);
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_EVAS_BIDI_TYPEDEF(Level);
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_EVAS_BIDI_TYPEDEF(JoiningType);
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typedef struct _Evas_BiDi_Paragraph_Props Evas_BiDi_Paragraph_Props;
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typedef struct _Evas_BiDi_Props Evas_BiDi_Props;
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/* This structure defines a set of properties of a BiDi string. In case of a
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* non-bidi string, all values should be NULL.
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* To check if a structure describes a bidi string or not, use the macro
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* EVAS_BIDI_IS_BIDI_PROP. RTL-only strings are also treated as bidi ATM.
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*/
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struct _Evas_BiDi_Paragraph_Props {
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EvasBiDiCharType *char_types; /* BiDi char types */
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EvasBiDiLevel *embedding_levels; /* BiDi embedding levels */
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int refcount; /* The number of references to this object */
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#ifdef USE_FRIBIDI
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EvasBiDiParType direction;
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#endif
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};
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struct _Evas_BiDi_Props {
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Evas_BiDi_Direction dir;
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};
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#ifdef USE_FRIBIDI
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#define EVAS_BIDI_PARAGRAPH_NATURAL FRIBIDI_PAR_ON
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#define EVAS_BIDI_PARAGRAPH_LTR FRIBIDI_PAR_LTR
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#define EVAS_BIDI_PARAGRAPH_RTL FRIBIDI_PAR_RTL
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#define EVAS_BIDI_PARAGRAPH_WLTR FRIBIDI_PAR_WLTR
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#define EVAS_BIDI_PARAGRAPH_WRTL FRIBIDI_PAR_WRTL
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#define EVAS_BIDI_PARAGRAPH_DIRECTION_IS_RTL(x) \
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(((x) && \
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((x->direction == EVAS_BIDI_PARAGRAPH_RTL) || \
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(x->direction == EVAS_BIDI_PARAGRAPH_WRTL))) ? \
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EINA_TRUE : EINA_FALSE)
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# define evas_bidi_position_visual_to_logical(list, position) \
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(list) ? list[position] : position;
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EvasBiDiStrIndex
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evas_bidi_position_logical_to_visual(EvasBiDiStrIndex *v_to_l, int len, EvasBiDiStrIndex position);
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EvasBiDiStrIndex
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evas_bidi_position_reverse(const Evas_BiDi_Props *props, int len, EvasBiDiStrIndex position);
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Eina_Bool
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evas_bidi_is_rtl_str(const Eina_Unicode *str);
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Eina_Bool
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evas_bidi_is_rtl_char(const Evas_BiDi_Paragraph_Props *bidi_props, size_t start, EvasBiDiStrIndex index);
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int
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evas_bidi_end_of_run_get(const Evas_BiDi_Paragraph_Props *bidi_props, size_t start, int len);
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Eina_Bool
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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);
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void
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evas_bidi_reverse_string(Eina_Unicode *str) EINA_ARG_NONNULL(1);
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Evas_BiDi_Paragraph_Props *
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evas_bidi_paragraph_props_get(const Eina_Unicode *eina_ustr) EINA_ARG_NONNULL(1) EINA_MALLOC EINA_WARN_UNUSED_RESULT;
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void
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evas_bidi_props_copy_and_ref(const Evas_BiDi_Props *src, Evas_BiDi_Props *dst);
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Eina_Bool
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evas_bidi_shape_string(Eina_Unicode *eina_ustr, const Evas_BiDi_Paragraph_Props *bidi_props, size_t start, size_t len);
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void
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evas_bidi_props_clean(Evas_BiDi_Props *intl_props) EINA_ARG_NONNULL(1);
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void
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evas_bidi_paragraph_props_clean(Evas_BiDi_Paragraph_Props *bidi_props) EINA_ARG_NONNULL(1);
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Evas_BiDi_Paragraph_Props *
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evas_bidi_paragraph_props_ref(Evas_BiDi_Paragraph_Props *bidi_props) EINA_ARG_NONNULL(1);
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void
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evas_bidi_paragraph_props_unref(Evas_BiDi_Paragraph_Props *bidi_props) EINA_ARG_NONNULL(1);
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Evas_BiDi_Paragraph_Props *
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evas_bidi_paragraph_props_new(void) EINA_MALLOC EINA_WARN_UNUSED_RESULT;
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#endif
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/**
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* @}
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*/
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/**
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* @}
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*/
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#endif
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