[Complex Text Layouts] Add third-party TextServer dependencies (ICU, HarfBuzz, Graphite).

1 files changed, 185 insertions, 0 deletions

diff --git a/thirdparty/harfbuzz/src/hb-ot-shape-complex-hebrew.cc b/thirdparty/harfbuzz/src/hb-ot-shape-complex-hebrew.cc
new file mode 100644
index 0000000000..334d3ded82
--- /dev/null
+++ b/thirdparty/harfbuzz/src/hb-ot-shape-complex-hebrew.cc
@@ -0,0 +1,185 @@
+/*
+ * Copyright © 2010,2012  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.
+ *
+ * IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR
+ * DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES
+ * ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN
+ * IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH
+ * DAMAGE.
+ *
+ * THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING,
+ * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
+ * FITNESS FOR A PARTICULAR PURPOSE.  THE SOFTWARE PROVIDED HEREUNDER IS
+ * ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO
+ * PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
+ *
+ * Google Author(s): Behdad Esfahbod
+ */
+
+#include "hb.hh"
+
+#ifndef HB_NO_OT_SHAPE
+
+#include "hb-ot-shape-complex.hh"
+
+
+static bool
+compose_hebrew (const hb_ot_shape_normalize_context_t *c,
+		hb_codepoint_t  a,
+		hb_codepoint_t  b,
+		hb_codepoint_t *ab)
+{
+  /* Hebrew presentation-form shaping.
+   * https://bugzilla.mozilla.org/show_bug.cgi?id=728866
+   * Hebrew presentation forms with dagesh, for characters U+05D0..05EA;
+   * Note that some letters do not have a dagesh presForm encoded.
+   */
+  static const hb_codepoint_t sDageshForms[0x05EAu - 0x05D0u + 1] = {
+    0xFB30u, /* ALEF */
+    0xFB31u, /* BET */
+    0xFB32u, /* GIMEL */
+    0xFB33u, /* DALET */
+    0xFB34u, /* HE */
+    0xFB35u, /* VAV */
+    0xFB36u, /* ZAYIN */
+    0x0000u, /* HET */
+    0xFB38u, /* TET */
+    0xFB39u, /* YOD */
+    0xFB3Au, /* FINAL KAF */
+    0xFB3Bu, /* KAF */
+    0xFB3Cu, /* LAMED */
+    0x0000u, /* FINAL MEM */
+    0xFB3Eu, /* MEM */
+    0x0000u, /* FINAL NUN */
+    0xFB40u, /* NUN */
+    0xFB41u, /* SAMEKH */
+    0x0000u, /* AYIN */
+    0xFB43u, /* FINAL PE */
+    0xFB44u, /* PE */
+    0x0000u, /* FINAL TSADI */
+    0xFB46u, /* TSADI */
+    0xFB47u, /* QOF */
+    0xFB48u, /* RESH */
+    0xFB49u, /* SHIN */
+    0xFB4Au /* TAV */
+  };
+
+  bool found = (bool) c->unicode->compose (a, b, ab);
+
+#ifdef HB_NO_OT_SHAPE_COMPLEX_HEBREW_FALLBACK
+  return found;
+#endif
+
+  if (!found && !c->plan->has_gpos_mark)
+  {
+      /* Special-case Hebrew presentation forms that are excluded from
+       * standard normalization, but wanted for old fonts. */
+      switch (b) {
+      case 0x05B4u: /* HIRIQ */
+	  if (a == 0x05D9u) { /* YOD */
+	      *ab = 0xFB1Du;
+	      found = true;
+	  }
+	  break;
+      case 0x05B7u: /* patah */
+	  if (a == 0x05F2u) { /* YIDDISH YOD YOD */
+	      *ab = 0xFB1Fu;
+	      found = true;
+	  } else if (a == 0x05D0u) { /* ALEF */
+	      *ab = 0xFB2Eu;
+	      found = true;
+	  }
+	  break;
+      case 0x05B8u: /* QAMATS */
+	  if (a == 0x05D0u) { /* ALEF */
+	      *ab = 0xFB2Fu;
+	      found = true;
+	  }
+	  break;
+      case 0x05B9u: /* HOLAM */
+	  if (a == 0x05D5u) { /* VAV */
+	      *ab = 0xFB4Bu;
+	      found = true;
+	  }
+	  break;
+      case 0x05BCu: /* DAGESH */
+	  if (a >= 0x05D0u && a <= 0x05EAu) {
+	      *ab = sDageshForms[a - 0x05D0u];
+	      found = (*ab != 0);
+	  } else if (a == 0xFB2Au) { /* SHIN WITH SHIN DOT */
+	      *ab = 0xFB2Cu;
+	      found = true;
+	  } else if (a == 0xFB2Bu) { /* SHIN WITH SIN DOT */
+	      *ab = 0xFB2Du;
+	      found = true;
+	  }
+	  break;
+      case 0x05BFu: /* RAFE */
+	  switch (a) {
+	  case 0x05D1u: /* BET */
+	      *ab = 0xFB4Cu;
+	      found = true;
+	      break;
+	  case 0x05DBu: /* KAF */
+	      *ab = 0xFB4Du;
+	      found = true;
+	      break;
+	  case 0x05E4u: /* PE */
+	      *ab = 0xFB4Eu;
+	      found = true;
+	      break;
+	  }
+	  break;
+      case 0x05C1u: /* SHIN DOT */
+	  if (a == 0x05E9u) { /* SHIN */
+	      *ab = 0xFB2Au;
+	      found = true;
+	  } else if (a == 0xFB49u) { /* SHIN WITH DAGESH */
+	      *ab = 0xFB2Cu;
+	      found = true;
+	  }
+	  break;
+      case 0x05C2u: /* SIN DOT */
+	  if (a == 0x05E9u) { /* SHIN */
+	      *ab = 0xFB2Bu;
+	      found = true;
+	  } else if (a == 0xFB49u) { /* SHIN WITH DAGESH */
+	      *ab = 0xFB2Du;
+	      found = true;
+	  }
+	  break;
+      }
+  }
+
+  return found;
+}
+
+
+const hb_ot_complex_shaper_t _hb_ot_complex_shaper_hebrew =
+{
+  nullptr, /* collect_features */
+  nullptr, /* override_features */
+  nullptr, /* data_create */
+  nullptr, /* data_destroy */
+  nullptr, /* preprocess_text */
+  nullptr, /* postprocess_glyphs */
+  HB_OT_SHAPE_NORMALIZATION_MODE_DEFAULT,
+  nullptr, /* decompose */
+  compose_hebrew,
+  nullptr, /* setup_masks */
+  HB_TAG ('h','e','b','r'), /* gpos_tag. https://github.com/harfbuzz/harfbuzz/issues/347#issuecomment-267838368 */
+  nullptr, /* reorder_marks */
+  HB_OT_SHAPE_ZERO_WIDTH_MARKS_BY_GDEF_LATE,
+  true, /* fallback_position */
+};
+
+
+#endif