lv_bidi.h

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#ifndef LV_BIDI_H
#define LV_BIDI_H
 
#ifdef __cplusplus
extern "C" {
#endif
 
/*********************
 *      INCLUDES
 *********************/
#include "../lv_conf_internal.h"
 
#include <stdbool.h>
#include <stdint.h>
#include "lv_txt.h"
 
/*********************
 *      DEFINES
 *********************/
/*Special non printable strong characters.
 *They can be inserted to texts to affect the run's direction*/
#define LV_BIDI_LRO  "\xE2\x80\xAD" /*U+202D*/
#define LV_BIDI_RLO  "\xE2\x80\xAE" /*U+202E*/
 
/**********************
 *      TYPEDEFS
 **********************/
enum {
    LV_BASE_DIR_LTR      = 0x00,
    LV_BASE_DIR_RTL      = 0x01,
    LV_BASE_DIR_AUTO     = 0x02,
 
    LV_BASE_DIR_NEUTRAL  = 0x20,
    LV_BASE_DIR_WEAK     = 0x21,
};
 
typedef uint8_t lv_base_dir_t;
 
/**********************
 * GLOBAL PROTOTYPES
 **********************/
#if LV_USE_BIDI
 
void _lv_bidi_process(const char * str_in, char * str_out, lv_base_dir_t base_dir);
 
lv_base_dir_t _lv_bidi_detect_base_dir(const char * txt);
 
uint16_t _lv_bidi_get_logical_pos(const char * str_in, char ** bidi_txt, uint32_t len, lv_base_dir_t base_dir,
                                  uint32_t visual_pos, bool * is_rtl);
 
uint16_t _lv_bidi_get_visual_pos(const char * str_in, char ** bidi_txt, uint16_t len, lv_base_dir_t base_dir,
                                 uint32_t logical_pos, bool * is_rtl);
 
void _lv_bidi_process_paragraph(const char * str_in, char * str_out, uint32_t len, lv_base_dir_t base_dir,
                                uint16_t * pos_conv_out, uint16_t pos_conv_len);
 
void lv_bidi_calculate_align(lv_text_align_t * align, lv_base_dir_t * base_dir, const char * txt);
 
 
/**********************
 *      MACROS
 **********************/
 
#else /*LV_USE_BIDI*/
static inline void lv_bidi_calculate_align(lv_text_align_t * align, lv_base_dir_t * base_dir, const char * txt)
{
    LV_UNUSED(txt);
    LV_UNUSED(base_dir);
    if(*align == LV_TEXT_ALIGN_AUTO) * align = LV_TEXT_ALIGN_LEFT;
}
#endif /*LV_USE_BIDI*/
 
#ifdef __cplusplus
} /*extern "C"*/
#endif
 
#endif /*LV_BIDI_H*/