84 lines
2.2 KiB
C
84 lines
2.2 KiB
C
/**
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* @file lv_bidi.h
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*
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*/
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#ifndef LV_BIDI_H
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#define LV_BIDI_H
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#ifdef __cplusplus
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extern "C" {
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#endif
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/*********************
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* INCLUDES
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*********************/
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#include "../lv_conf_internal.h"
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#include "lv_types.h"
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#include "lv_text.h"
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/*********************
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* DEFINES
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*********************/
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/** Special non printable strong characters.
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* They can be inserted to texts to affect the run's direction */
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#define LV_BIDI_LRO "\xE2\x80\xAD" /*U+202D*/
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#define LV_BIDI_RLO "\xE2\x80\xAE" /*U+202E*/
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/**********************
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* TYPEDEFS
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**********************/
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typedef enum {
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LV_BASE_DIR_LTR = 0x00,
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LV_BASE_DIR_RTL = 0x01,
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LV_BASE_DIR_AUTO = 0x02,
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LV_BASE_DIR_NEUTRAL = 0x20,
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LV_BASE_DIR_WEAK = 0x21,
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} lv_base_dir_t;
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/**********************
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* GLOBAL PROTOTYPES
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**********************/
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#if LV_USE_BIDI
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/**
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* Get the real text alignment from the a text alignment, base direction and a text.
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* @param align LV_TEXT_ALIGN_..., write back the calculated align here (LV_TEXT_ALIGN_LEFT/RIGHT/CENTER)
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* @param base_dir LV_BASE_DIR_..., write the calculated base dir here (LV_BASE_DIR_LTR/RTL)
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* @param txt a text, used with LV_BASE_DIR_AUTO to determine the base direction
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*/
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void lv_bidi_calculate_align(lv_text_align_t * align, lv_base_dir_t * base_dir, const char * txt);
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/**
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* Set custom neutrals string
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* @param neutrals default " \t\n\r.,:;'\"`!?%/\\-=()[]{}<>@#&$|"
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*/
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void lv_bidi_set_custom_neutrals_static(const char * neutrals);
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/**********************
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* MACROS
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**********************/
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#else /*LV_USE_BIDI*/
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/**
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* For compatibility if LV_USE_BIDI = 0
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* Get the real text alignment from the a text alignment, base direction and a text.
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* @param align For LV_TEXT_ALIGN_AUTO give LV_TEXT_ALIGN_LEFT else leave unchanged, write back the calculated align here
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* @param base_dir Unused
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* @param txt Unused
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*/
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static inline void lv_bidi_calculate_align(lv_text_align_t * align, lv_base_dir_t * base_dir, const char * txt)
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{
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LV_UNUSED(txt);
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LV_UNUSED(base_dir);
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if(*align == LV_TEXT_ALIGN_AUTO) * align = LV_TEXT_ALIGN_LEFT;
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}
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#endif /*LV_USE_BIDI*/
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#ifdef __cplusplus
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} /*extern "C"*/
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#endif
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#endif /*LV_BIDI_H*/
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