-#include "../evas_intl_utils.h"
-
-#ifdef ARABIC_SUPPORT
-/* arabic contextualizing */
-
-/* arabic input forms */
-#define ARABIC_ALEPH_MADDA 0x0622
-#define ARABIC_ALEPH 0x0627
-#define ARABIC_BET 0x0628
-#define ARABIC_TA_MARBUTA 0x0629
-#define ARABIC_TAW 0x062A
-#define ARABIC_TA 0x062B
-#define ARABIC_GIMEL 0x062C
-#define ARABIC_HETH 0x062D
-#define ARABIC_HA 0x062E
-#define ARABIC_DALET 0x062F
-#define ARABIC_DAL 0x0630
-#define ARABIC_RESH 0x0631
-#define ARABIC_ZAYIN 0x0632
-#define ARABIC_SHIN 0x0633
-#define ARABIC_SH 0x0634
-#define ARABIC_TSADE 0x0635
-#define ARABIC_DAD 0x0636
-#define ARABIC_TETH 0x0637
-#define ARABIC_ZA 0x0638
-#define ARABIC_AYIN 0x0639
-#define ARABIC_GHAIN 0x063A
-#define ARABIC_PE 0x0641
-#define ARABIC_QOPH 0x0642
-#define ARABIC_KAPH 0x0643
-#define ARABIC_LAMED 0x0644
-#define ARABIC_MEM 0x0645
-#define ARABIC_NUN 0x0646
-#define ARABIC_HE 0x0647
-#define ARABIC_WAW 0x0648
-#define ARABIC_ALEPH_MAQSURA 0x0649
-#define ARABIC_YODH 0x064A
-/* arabic contextual forms */
-#define ARABIC_ISOLATED_ALEPH_MADDA 0xFE81
-#define ARABIC_ISOLATED_ALEPH 0xFE8D
-#define ARABIC_ISOLATED_TA_MARBUTA 0xFE93
-#define ARABIC_ISOLATED_BET 0xFE8F
-#define ARABIC_ISOLATED_TAW 0xFE95
-#define ARABIC_ISOLATED_TA 0xFE99
-#define ARABIC_ISOLATED_GIMEL 0xFE9D
-#define ARABIC_ISOLATED_HETH 0xFEA1
-#define ARABIC_ISOLATED_HA 0xFEA5
-#define ARABIC_ISOLATED_DALET 0xFEA9
-#define ARABIC_ISOLATED_DAL 0xFEAB
-#define ARABIC_ISOLATED_RESH 0xFEAD
-#define ARABIC_ISOLATED_ZAYIN 0xFEAF
-#define ARABIC_ISOLATED_SHIN 0xFEB1
-#define ARABIC_ISOLATED_SH 0xFEB5
-#define ARABIC_ISOLATED_TSADE 0xFEB9
-#define ARABIC_ISOLATED_DAD 0xFEBD
-#define ARABIC_ISOLATED_TETH 0xFEC1
-#define ARABIC_ISOLATED_ZA 0xFEC5
-#define ARABIC_ISOLATED_AYIN 0xFEC9
-#define ARABIC_ISOLATED_GHAIN 0xFECD
-#define ARABIC_ISOLATED_PE 0xFED1
-#define ARABIC_ISOLATED_QOPH 0xFED5
-#define ARABIC_ISOLATED_KAPH 0xFED9
-#define ARABIC_ISOLATED_LAMED 0xFEDD
-#define ARABIC_ISOLATED_MEM 0xFEE1
-#define ARABIC_ISOLATED_NUN 0xFEE5
-#define ARABIC_ISOLATED_HE 0xFEE9
-#define ARABIC_ISOLATED_WAW 0xFEED
-#define ARABIC_ISOLATED_ALEPH_MAQSURA 0xFEEF
-#define ARABIC_ISOLATED_YODH 0xFEF1
-
-#define ARABIC_IS_SPECIAL_LETTER(c) ((c) == ARABIC_ISOLATED_ALEPH || \
- (c) == ARABIC_ISOLATED_DALET || \
- (c) == ARABIC_ISOLATED_DAL || \
- (c) == ARABIC_ISOLATED_RESH || \
- (c) == ARABIC_ISOLATED_ZAYIN || \
- (c) == ARABIC_ISOLATED_WAW || \
- (c) == ARABIC_ISOLATED_TA_MARBUTA)
-/* from the first to last (including all forms, and special cases
- * like aleph maqsura in some forms*/
-#define ARABIC_IS_CONTEXT(c) (((c) >= ARABIC_ISOLATED_ALEPH && (c) <= ARABIC_ISOLATED_YODH + 3) || \
- ((c) >= ARABIC_ISOLATED_ALEPH_MADDA && (c) <= ARABIC_ISOLATED_ALEPH_MADDA + 3) || \
- (c) == 0xFBE8 || \
- (c) == 0xFBE9)
-#define ARABIC_IS_LETTER(c) ARABIC_IS_CONTEXT(c)
-/* used for arabic context logic */
-/* each value is the offset from the regular char in unicode */
-enum _ArabicContext {
- ARABIC_CONTEXT_ISOLATED = 0,
- ARABIC_CONTEXT_FINAL = 1,
- ARABIC_CONTEXT_INITIAL = 2,
- ARABIC_CONTEXT_MEDIAL = 3
-};
-typedef enum _ArabicContext ArabicContext;
-
-static FriBidiChar
-_evas_intl_arabic_isolated_to_context(FriBidiChar chr, ArabicContext context);
-
-static int
-_evas_intl_arabic_text_to_isolated(FriBidiChar *text);
-
-static FriBidiChar
-_evas_intl_arabic_general_to_isolated(FriBidiChar chr);
-
-/* FIXME: there are issues with text that's already in context
- * vowels support is needed (skip them when analysing context)*/
-int
-evas_intl_arabic_to_context(FriBidiChar *text)
-{
- int i;
- int len;
- int start_of_context = 1; /* assume the first is special/non arabic */
- int last_is_first = 0;
- int last_letter = 0;
-
- /* check for empty string */
- if (!*text)
- return 0;
-
- len = _evas_intl_arabic_text_to_isolated(text);
- /*FIXME: make it skip vowels */
- for (i = 0; i < len; i++)
- {
- if (!ARABIC_IS_LETTER(text[i]))
- {
- /* mark so it won't be touched,
- * though start formating */
- if (last_letter && !start_of_context)
- {
- ArabicContext tmp = (last_is_first) ?
- ARABIC_CONTEXT_ISOLATED : ARABIC_CONTEXT_FINAL;
- text[i-1] = _evas_intl_arabic_isolated_to_context(
- last_letter,
- tmp);
- }
- last_is_first = 0;
- start_of_context = 1;
- last_letter = 0;
- continue;
- }
- /* adjust the last letter */
- last_letter = text[i];
- if (ARABIC_IS_SPECIAL_LETTER(text[i]))
- {
- if (!start_of_context)
- text[i] = _evas_intl_arabic_isolated_to_context(text[i], ARABIC_CONTEXT_FINAL);
- /* else: leave isolated */
-
- start_of_context = 1;
- last_is_first = 0;
- continue;
- }
-
- if (start_of_context)
- {
- text[i] = _evas_intl_arabic_isolated_to_context(text[i], ARABIC_CONTEXT_INITIAL);
- last_is_first = 1;
- }
- else
- {
- text[i] = _evas_intl_arabic_isolated_to_context(text[i], ARABIC_CONTEXT_MEDIAL);
- last_is_first = 0;
- }
- /* spceial chars don't get here. */
- start_of_context = 0;
-
- }
- /* if it's arabic and not isolated, the last is always final */
- i--;
- if (last_letter && !start_of_context)
- {
- ArabicContext tmp = (last_is_first) ? ARABIC_CONTEXT_ISOLATED : ARABIC_CONTEXT_FINAL;
- /* because it's medial atm, and should be isolated */
- text[i] = _evas_intl_arabic_isolated_to_context(last_letter, tmp);
- }
-
- return len;
-}
-
-/* I wish I could think about a simpler way to do it.
- * Just match every word with it's isolated form */
-static FriBidiChar
-_evas_intl_arabic_general_to_isolated(FriBidiChar chr)
-{
- switch (chr)
- {
- case ARABIC_ALEPH_MADDA:
- return ARABIC_ISOLATED_ALEPH_MADDA;
-
- case ARABIC_ALEPH:
- return ARABIC_ISOLATED_ALEPH;
-
- case ARABIC_TA_MARBUTA:
- return ARABIC_ISOLATED_TA_MARBUTA;
-
- case ARABIC_BET:
- return ARABIC_ISOLATED_BET;
-
- case ARABIC_TAW:
- return ARABIC_ISOLATED_TAW;
-
- case ARABIC_TA:
- return ARABIC_ISOLATED_TA;
-
- case ARABIC_GIMEL:
- return ARABIC_ISOLATED_GIMEL;
-
- case ARABIC_HETH:
- return ARABIC_ISOLATED_HETH;
-
- case ARABIC_HA:
- return ARABIC_ISOLATED_HA;
-
- case ARABIC_DALET:
- return ARABIC_ISOLATED_DALET;
-
- case ARABIC_DAL:
- return ARABIC_ISOLATED_DAL;
-
- case ARABIC_RESH:
- return ARABIC_ISOLATED_RESH;
-
- case ARABIC_ZAYIN:
- return ARABIC_ISOLATED_ZAYIN;
-
- case ARABIC_SHIN:
- return ARABIC_ISOLATED_SHIN;
-
- case ARABIC_SH:
- return ARABIC_ISOLATED_SH;
-
- case ARABIC_TSADE:
- return ARABIC_ISOLATED_TSADE;
-
- case ARABIC_DAD:
- return ARABIC_ISOLATED_DAD;
-
- case ARABIC_TETH:
- return ARABIC_ISOLATED_TETH;
-
- case ARABIC_ZA:
- return ARABIC_ISOLATED_ZA;
-
- case ARABIC_AYIN:
- return ARABIC_ISOLATED_AYIN;
-
- case ARABIC_GHAIN:
- return ARABIC_ISOLATED_GHAIN;
-
- case ARABIC_PE:
- return ARABIC_ISOLATED_PE;
-
- case ARABIC_QOPH:
- return ARABIC_ISOLATED_QOPH;
-
- case ARABIC_KAPH:
- return ARABIC_ISOLATED_KAPH;
-
- case ARABIC_LAMED:
- return ARABIC_ISOLATED_LAMED;
-
- case ARABIC_MEM:
- return ARABIC_ISOLATED_MEM;
-
- case ARABIC_NUN:
- return ARABIC_ISOLATED_NUN;
-
- case ARABIC_HE:
- return ARABIC_ISOLATED_HE;
-
- case ARABIC_WAW:
- return ARABIC_ISOLATED_WAW;
-
- case ARABIC_ALEPH_MAQSURA:
- return ARABIC_ISOLATED_ALEPH_MAQSURA;
-
- case ARABIC_YODH:
- return ARABIC_ISOLATED_YODH;
- default:
- return chr;
- }
-}
-
-static FriBidiChar
-_evas_intl_arabic_isolated_to_context(FriBidiChar chr, ArabicContext context)
-{
- if (ARABIC_IS_SPECIAL_LETTER(chr))
- {
- if (context == ARABIC_CONTEXT_INITIAL)
- return chr;
- else
- return chr + ARABIC_CONTEXT_FINAL;
- }
- /* HACK AROUND ALIF MAQSURA */
- else if (chr == ARABIC_ISOLATED_ALEPH_MAQSURA && context > 1)
- {
- chr = 0xFBE8; /* the initial form */
- context -= 2;
- }
- return chr + context;
-}
-
-static int
-_evas_intl_arabic_text_to_isolated(FriBidiChar *text)
-{
- int i = 0;
- while (*text)
- {
- /* if it's not arabic/it's already in context
- * it's just returned the same */
- *text = _evas_intl_arabic_general_to_isolated(*text);
- text++;
- i++;
- }
- return i;
-}
-#endif
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