1 /**
2 * @file lv_bidi.h
3 *
4 */
5
6 #ifndef LV_BIDI_H
7 #define LV_BIDI_H
8
9 #ifdef __cplusplus
10 extern "C" {
11 #endif
12
13 /*********************
14 * INCLUDES
15 *********************/
16 #include "../lv_conf_internal.h"
17 #include "lv_types.h"
18 #include "lv_text.h"
19
20 /*********************
21 * DEFINES
22 *********************/
23 /** Special non printable strong characters.
24 * They can be inserted to texts to affect the run's direction */
25 #define LV_BIDI_LRO "\xE2\x80\xAD" /*U+202D*/
26 #define LV_BIDI_RLO "\xE2\x80\xAE" /*U+202E*/
27
28 /**********************
29 * TYPEDEFS
30 **********************/
31 typedef enum {
32 LV_BASE_DIR_LTR = 0x00,
33 LV_BASE_DIR_RTL = 0x01,
34 LV_BASE_DIR_AUTO = 0x02,
35
36 LV_BASE_DIR_NEUTRAL = 0x20,
37 LV_BASE_DIR_WEAK = 0x21,
38 } lv_base_dir_t;
39
40 /**********************
41 * GLOBAL PROTOTYPES
42 **********************/
43 #if LV_USE_BIDI
44
45 /**
46 * Get the real text alignment from the a text alignment, base direction and a text.
47 * @param align LV_TEXT_ALIGN_..., write back the calculated align here (LV_TEXT_ALIGN_LEFT/RIGHT/CENTER)
48 * @param base_dir LV_BASE_DIR_..., write the calculated base dir here (LV_BASE_DIR_LTR/RTL)
49 * @param txt a text, used with LV_BASE_DIR_AUTO to determine the base direction
50 */
51 void lv_bidi_calculate_align(lv_text_align_t * align, lv_base_dir_t * base_dir, const char * txt);
52
53 /**
54 * Set custom neutrals string
55 * @param neutrals default " \t\n\r.,:;'\"`!?%/\\-=()[]{}<>@#&$|"
56 */
57 void lv_bidi_set_custom_neutrals_static(const char * neutrals);
58
59 /**********************
60 * MACROS
61 **********************/
62
63 #else /*LV_USE_BIDI*/
64 /**
65 * For compatibility if LV_USE_BIDI = 0
66 * Get the real text alignment from the a text alignment, base direction and a text.
67 * @param align For LV_TEXT_ALIGN_AUTO give LV_TEXT_ALIGN_LEFT else leave unchanged, write back the calculated align here
68 * @param base_dir Unused
69 * @param txt Unused
70 */
lv_bidi_calculate_align(lv_text_align_t * align,lv_base_dir_t * base_dir,const char * txt)71 static inline void lv_bidi_calculate_align(lv_text_align_t * align, lv_base_dir_t * base_dir, const char * txt)
72 {
73 LV_UNUSED(txt);
74 LV_UNUSED(base_dir);
75 if(*align == LV_TEXT_ALIGN_AUTO) * align = LV_TEXT_ALIGN_LEFT;
76 }
77 #endif /*LV_USE_BIDI*/
78
79 #ifdef __cplusplus
80 } /*extern "C"*/
81 #endif
82
83 #endif /*LV_BIDI_H*/
84
