Roll HarfBuzz to 0.9.32

third_party/harfbuzz-ng/src/hb-ot-shape-complex-indic-private.hh

 /*
  * Copyright © 2012  Google, Inc.
  *
  *  This is part of HarfBuzz, a text shaping library.
  *
  * Permission is hereby granted, without written agreement and without
  * license or royalty fees, to use, copy, modify, and distribute this
  * software and its documentation for any purpose, provided that the
  * above copyright notice and the following two paragraphs appear in
  * all copies of this software.
@@ skipping 35 matching lines @@
   OT_C = 1,
   OT_V = 2,
   OT_N = 3,
   OT_H = 4,
   OT_ZWNJ = 5,
   OT_ZWJ = 6,
   OT_M = 7,
   OT_SM = 8,
   OT_VD = 9,
   OT_A = 10,
-  OT_NBSP = 11,
+  OT_PLACEHOLDER = 11,
   OT_DOTTEDCIRCLE = 12,
   OT_RS = 13, /* Register Shifter, used in Khmer OT spec. */
   OT_Coeng = 14, /* Khmer-style Virama. */
   OT_Repha = 15, /* Atomically-encoded logical or visual repha. */
   OT_Ra = 16,
   OT_CM = 17,  /* Consonant-Medial. */
-  OT_Avag = 18, /* Avagraha. */
+  OT_Symbol = 18, /* Avagraha, etc that take marks (SM,A,VD). */
   OT_CM2 = 31 /* Consonant-Medial, second slot. */
 };
 
+#define MEDIAL_FLAGS (FLAG (OT_CM) | FLAG (OT_CM2))
+
+/* Note:
+ *
+ * We treat Vowels and placeholders as if they were consonants.  This is safe because Vowels
+ * cannot happen in a consonant syllable.  The plus side however is, we can call the
+ * consonant syllable logic from the vowel syllable function and get it all right! */
+#define CONSONANT_FLAGS (FLAG (OT_C) | FLAG (OT_Ra) | MEDIAL_FLAGS | FLAG (OT_V) | FLAG (OT_PLACEHOLDER) | FLAG (OT_DOTTEDCIRCLE))
+#define JOINER_FLAGS (FLAG (OT_ZWJ) | FLAG (OT_ZWNJ))
+#define HALANT_OR_COENG_FLAGS (FLAG (OT_H) | FLAG (OT_Coeng))
+
+
 /* Visual positions in a syllable from left to right. */
 enum indic_position_t {
   POS_START,
 
   POS_RA_TO_BECOME_REPH,
   POS_PRE_M,
   POS_PRE_C,
 
   POS_BASE_C,
   POS_AFTER_MAIN,
 
   POS_ABOVE_C,
 
   POS_BEFORE_SUB,
   POS_BELOW_C,
   POS_AFTER_SUB,
 
   POS_BEFORE_POST,
   POS_POST_C,
   POS_AFTER_POST,
 
   POS_FINAL_C,
   POS_SMVD,
 
   POS_END
 };
 
 /* Categories used in IndicSyllabicCategory.txt from UCD. */
 enum indic_syllabic_category_t {
-  INDIC_SYLLABIC_CATEGORY_OTHER                 = OT_X,
+  INDIC_SYLLABIC_CATEGORY_OTHER                         = OT_X,
 
-  INDIC_SYLLABIC_CATEGORY_AVAGRAHA              = OT_Avag,
-  INDIC_SYLLABIC_CATEGORY_BINDU                 = OT_SM,
-  INDIC_SYLLABIC_CATEGORY_CONSONANT             = OT_C,
-  INDIC_SYLLABIC_CATEGORY_CONSONANT_DEAD        = OT_C,
-  INDIC_SYLLABIC_CATEGORY_CONSONANT_FINAL       = OT_CM,
-  INDIC_SYLLABIC_CATEGORY_CONSONANT_HEAD_LETTER = OT_C,
-  INDIC_SYLLABIC_CATEGORY_CONSONANT_MEDIAL      = OT_CM,
-  INDIC_SYLLABIC_CATEGORY_CONSONANT_PLACEHOLDER = OT_NBSP,
-  INDIC_SYLLABIC_CATEGORY_CONSONANT_SUBJOINED   = OT_CM,
-  INDIC_SYLLABIC_CATEGORY_CONSONANT_REPHA       = OT_Repha,
-  INDIC_SYLLABIC_CATEGORY_MODIFYING_LETTER      = OT_X,
-  INDIC_SYLLABIC_CATEGORY_NUKTA                 = OT_N,
-  INDIC_SYLLABIC_CATEGORY_REGISTER_SHIFTER      = OT_RS,
-  INDIC_SYLLABIC_CATEGORY_TONE_LETTER           = OT_X,
-  INDIC_SYLLABIC_CATEGORY_TONE_MARK             = OT_N,
-  INDIC_SYLLABIC_CATEGORY_VIRAMA                = OT_H,
-  INDIC_SYLLABIC_CATEGORY_VISARGA               = OT_SM,
-  INDIC_SYLLABIC_CATEGORY_VOWEL                 = OT_V,
-  INDIC_SYLLABIC_CATEGORY_VOWEL_DEPENDENT       = OT_M,
-  INDIC_SYLLABIC_CATEGORY_VOWEL_INDEPENDENT     = OT_V
+  INDIC_SYLLABIC_CATEGORY_AVAGRAHA                      = OT_Symbol,
+  INDIC_SYLLABIC_CATEGORY_BINDU                         = OT_SM,
+  INDIC_SYLLABIC_CATEGORY_BRAHMI_JOINING_NUMBER         = OT_PLACEHOLDER, /* TODO */
+  INDIC_SYLLABIC_CATEGORY_CANTILLATION_MARK             = OT_A,
+  INDIC_SYLLABIC_CATEGORY_CONSONANT                     = OT_C,
+  INDIC_SYLLABIC_CATEGORY_CONSONANT_DEAD                = OT_C,
+  INDIC_SYLLABIC_CATEGORY_CONSONANT_FINAL               = OT_CM,
+  INDIC_SYLLABIC_CATEGORY_CONSONANT_HEAD_LETTER         = OT_C,
+  INDIC_SYLLABIC_CATEGORY_CONSONANT_MEDIAL              = OT_CM,
+  INDIC_SYLLABIC_CATEGORY_CONSONANT_PLACEHOLDER         = OT_PLACEHOLDER,
+  INDIC_SYLLABIC_CATEGORY_CONSONANT_PRECEDING_REPHA     = OT_Repha,
+  INDIC_SYLLABIC_CATEGORY_CONSONANT_SUBJOINED           = OT_CM,
+  INDIC_SYLLABIC_CATEGORY_CONSONANT_SUCCEEDING_REPHA    = OT_N,
+  INDIC_SYLLABIC_CATEGORY_GEMINATION_MARK               = OT_SM,
+  INDIC_SYLLABIC_CATEGORY_INVISIBLE_STACKER             = OT_H, /* TODO */
+  INDIC_SYLLABIC_CATEGORY_JOINER                        = OT_ZWJ,
+  INDIC_SYLLABIC_CATEGORY_MODIFYING_LETTER              = OT_X,
+  INDIC_SYLLABIC_CATEGORY_NON_JOINER                    = OT_ZWNJ,
+  INDIC_SYLLABIC_CATEGORY_NUKTA                         = OT_N,
+  INDIC_SYLLABIC_CATEGORY_NUMBER                        = OT_PLACEHOLDER,
+  INDIC_SYLLABIC_CATEGORY_NUMBER_JOINER                 = OT_PLACEHOLDER, /* TODO */
+  INDIC_SYLLABIC_CATEGORY_PURE_KILLER                   = OT_H, /* TODO */
+  INDIC_SYLLABIC_CATEGORY_REGISTER_SHIFTER              = OT_RS,
+  INDIC_SYLLABIC_CATEGORY_TONE_LETTER                   = OT_X,
+  INDIC_SYLLABIC_CATEGORY_TONE_MARK                     = OT_N,
+  INDIC_SYLLABIC_CATEGORY_VIRAMA                        = OT_H,
+  INDIC_SYLLABIC_CATEGORY_VISARGA                       = OT_SM,
+  INDIC_SYLLABIC_CATEGORY_VOWEL                         = OT_V,
+  INDIC_SYLLABIC_CATEGORY_VOWEL_DEPENDENT               = OT_M,
+  INDIC_SYLLABIC_CATEGORY_VOWEL_INDEPENDENT             = OT_V
 };
 
 /* Categories used in IndicSMatraCategory.txt from UCD */
 enum indic_matra_category_t {
-  INDIC_MATRA_CATEGORY_NOT_APPLICABLE           = POS_END,
+  INDIC_MATRA_CATEGORY_NOT_APPLICABLE                   = POS_END,
 
-  INDIC_MATRA_CATEGORY_LEFT                     = POS_PRE_C,
-  INDIC_MATRA_CATEGORY_TOP                      = POS_ABOVE_C,
-  INDIC_MATRA_CATEGORY_BOTTOM                   = POS_BELOW_C,
-  INDIC_MATRA_CATEGORY_RIGHT                    = POS_POST_C,
+  INDIC_MATRA_CATEGORY_LEFT                             = POS_PRE_C,
+  INDIC_MATRA_CATEGORY_TOP                              = POS_ABOVE_C,
+  INDIC_MATRA_CATEGORY_BOTTOM                           = POS_BELOW_C,
+  INDIC_MATRA_CATEGORY_RIGHT                            = POS_POST_C,
 
   /* These should resolve to the position of the last part of the split sequence. */
-  INDIC_MATRA_CATEGORY_BOTTOM_AND_RIGHT         = INDIC_MATRA_CATEGORY_RIGHT,
-  INDIC_MATRA_CATEGORY_LEFT_AND_RIGHT           = INDIC_MATRA_CATEGORY_RIGHT,
-  INDIC_MATRA_CATEGORY_TOP_AND_BOTTOM           = INDIC_MATRA_CATEGORY_BOTTOM,
-  INDIC_MATRA_CATEGORY_TOP_AND_BOTTOM_AND_RIGHT = INDIC_MATRA_CATEGORY_RIGHT,
-  INDIC_MATRA_CATEGORY_TOP_AND_LEFT             = INDIC_MATRA_CATEGORY_TOP,
-  INDIC_MATRA_CATEGORY_TOP_AND_LEFT_AND_RIGHT   = INDIC_MATRA_CATEGORY_RIGHT,
-  INDIC_MATRA_CATEGORY_TOP_AND_RIGHT            = INDIC_MATRA_CATEGORY_RIGHT,
+  INDIC_MATRA_CATEGORY_BOTTOM_AND_RIGHT                 = INDIC_MATRA_CATEGORY_RIGHT,
+  INDIC_MATRA_CATEGORY_LEFT_AND_RIGHT                   = INDIC_MATRA_CATEGORY_RIGHT,
+  INDIC_MATRA_CATEGORY_TOP_AND_BOTTOM                   = INDIC_MATRA_CATEGORY_BOTTOM,
+  INDIC_MATRA_CATEGORY_TOP_AND_BOTTOM_AND_RIGHT         = INDIC_MATRA_CATEGORY_RIGHT,
+  INDIC_MATRA_CATEGORY_TOP_AND_LEFT                     = INDIC_MATRA_CATEGORY_TOP,
+  INDIC_MATRA_CATEGORY_TOP_AND_LEFT_AND_RIGHT           = INDIC_MATRA_CATEGORY_RIGHT,
+  INDIC_MATRA_CATEGORY_TOP_AND_RIGHT                    = INDIC_MATRA_CATEGORY_RIGHT,
 
-  INDIC_MATRA_CATEGORY_INVISIBLE                = INDIC_MATRA_CATEGORY_NOT_APPLICABLE,
-  INDIC_MATRA_CATEGORY_OVERSTRUCK               = POS_AFTER_MAIN,
-  INDIC_MATRA_CATEGORY_VISUAL_ORDER_LEFT        = POS_PRE_M
+  INDIC_MATRA_CATEGORY_OVERSTRUCK                       = POS_AFTER_MAIN,
+  INDIC_MATRA_CATEGORY_VISUAL_ORDER_LEFT                = POS_PRE_M
 };
 
 /* Note: We use ASSERT_STATIC_EXPR_ZERO() instead of ASSERT_STATIC_EXPR() and the comma operation
  * because gcc fails to optimize the latter and fills the table in at runtime. */
 #define INDIC_COMBINE_CATEGORIES(S,M) \
-  (ASSERT_STATIC_EXPR_ZERO (M == INDIC_MATRA_CATEGORY_NOT_APPLICABLE || (S == INDIC_SYLLABIC_CATEGORY_VIRAMA || S == INDIC_SYLLABIC_CATEGORY_VOWEL_DEPENDENT)) + \
+  (ASSERT_STATIC_EXPR_ZERO (M == INDIC_MATRA_CATEGORY_NOT_APPLICABLE || \
+                            ( \
+                             S == INDIC_SYLLABIC_CATEGORY_CONSONANT_MEDIAL || \
+                             S == INDIC_SYLLABIC_CATEGORY_GEMINATION_MARK || \
+                             S == INDIC_SYLLABIC_CATEGORY_REGISTER_SHIFTER || \
+                             S == INDIC_SYLLABIC_CATEGORY_CONSONANT_SUCCEEDING_REPHA || \
+                             S == INDIC_SYLLABIC_CATEGORY_VIRAMA || \
+                             S == INDIC_SYLLABIC_CATEGORY_VOWEL_DEPENDENT || \
+                             false)) + \
    ASSERT_STATIC_EXPR_ZERO (S < 255 && M < 255) + \
    ((M << 8) | S))
 
 HB_INTERNAL INDIC_TABLE_ELEMENT_TYPE
 hb_indic_get_categories (hb_codepoint_t u);
 
 #endif /* HB_OT_SHAPE_COMPLEX_INDIC_PRIVATE_HH */