The Tor Browser: gfx/harfbuzz/src/hb-glib.cc@129ffea94266 (annotated)

gfx/harfbuzz/src/hb-glib.cc@129ffea94266 (annotated)

gfx/harfbuzz/src/hb-glib.cc

Sat, 03 Jan 2015 20:18:00 +0100

author: Michael Schloh von Bennewitz <michael@schloh.com>
date: Sat, 03 Jan 2015 20:18:00 +0100
branch: TOR_BUG_3246
changeset 7: 129ffea94266
permissions: -rw-r--r--

Conditionally enable double key logic according to:
private browsing mode or privacy.thirdparty.isolate preference and
implement in GetCookieStringCommon and FindCookie where it counts...
With some reservations of how to convince FindCookie users to test
condition and pass a nullptr when disabling double key logic.

 /*
  * Copyright © 2009  Red Hat, Inc.
  * Copyright © 2011  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.
  *
  * Red Hat Author(s): Behdad Esfahbod
  * Google Author(s): Behdad Esfahbod
  */
 #include "hb-private.hh"
 #include "hb-glib.h"
 #include "hb-unicode-private.hh"
 #if !GLIB_CHECK_VERSION(2,29,14)
 static const hb_script_t
 glib_script_to_script[] =
 {
   HB_SCRIPT_COMMON,
   HB_SCRIPT_INHERITED,
   HB_SCRIPT_ARABIC,
   HB_SCRIPT_ARMENIAN,
   HB_SCRIPT_BENGALI,
   HB_SCRIPT_BOPOMOFO,
   HB_SCRIPT_CHEROKEE,
   HB_SCRIPT_COPTIC,
   HB_SCRIPT_CYRILLIC,
   HB_SCRIPT_DESERET,
   HB_SCRIPT_DEVANAGARI,
   HB_SCRIPT_ETHIOPIC,
   HB_SCRIPT_GEORGIAN,
   HB_SCRIPT_GOTHIC,
   HB_SCRIPT_GREEK,
   HB_SCRIPT_GUJARATI,
   HB_SCRIPT_GURMUKHI,
   HB_SCRIPT_HAN,
   HB_SCRIPT_HANGUL,
   HB_SCRIPT_HEBREW,
   HB_SCRIPT_HIRAGANA,
   HB_SCRIPT_KANNADA,
   HB_SCRIPT_KATAKANA,
   HB_SCRIPT_KHMER,
   HB_SCRIPT_LAO,
   HB_SCRIPT_LATIN,
   HB_SCRIPT_MALAYALAM,
   HB_SCRIPT_MONGOLIAN,
   HB_SCRIPT_MYANMAR,
   HB_SCRIPT_OGHAM,
   HB_SCRIPT_OLD_ITALIC,
   HB_SCRIPT_ORIYA,
   HB_SCRIPT_RUNIC,
   HB_SCRIPT_SINHALA,
   HB_SCRIPT_SYRIAC,
   HB_SCRIPT_TAMIL,
   HB_SCRIPT_TELUGU,
   HB_SCRIPT_THAANA,
   HB_SCRIPT_THAI,
   HB_SCRIPT_TIBETAN,
   HB_SCRIPT_CANADIAN_SYLLABICS,
   HB_SCRIPT_YI,
   HB_SCRIPT_TAGALOG,
   HB_SCRIPT_HANUNOO,
   HB_SCRIPT_BUHID,
   HB_SCRIPT_TAGBANWA,
   /* Unicode-4.0 additions */
   HB_SCRIPT_BRAILLE,
   HB_SCRIPT_CYPRIOT,
   HB_SCRIPT_LIMBU,
   HB_SCRIPT_OSMANYA,
   HB_SCRIPT_SHAVIAN,
   HB_SCRIPT_LINEAR_B,
   HB_SCRIPT_TAI_LE,
   HB_SCRIPT_UGARITIC,
   /* Unicode-4.1 additions */
   HB_SCRIPT_NEW_TAI_LUE,
   HB_SCRIPT_BUGINESE,
   HB_SCRIPT_GLAGOLITIC,
   HB_SCRIPT_TIFINAGH,
   HB_SCRIPT_SYLOTI_NAGRI,
   HB_SCRIPT_OLD_PERSIAN,
   HB_SCRIPT_KHAROSHTHI,
   /* Unicode-5.0 additions */
   HB_SCRIPT_UNKNOWN,
   HB_SCRIPT_BALINESE,
   HB_SCRIPT_CUNEIFORM,
   HB_SCRIPT_PHOENICIAN,
   HB_SCRIPT_PHAGS_PA,
   HB_SCRIPT_NKO,
   /* Unicode-5.1 additions */
   HB_SCRIPT_KAYAH_LI,
   HB_SCRIPT_LEPCHA,
   HB_SCRIPT_REJANG,
   HB_SCRIPT_SUNDANESE,
   HB_SCRIPT_SAURASHTRA,
   HB_SCRIPT_CHAM,
   HB_SCRIPT_OL_CHIKI,
   HB_SCRIPT_VAI,
   HB_SCRIPT_CARIAN,
   HB_SCRIPT_LYCIAN,
   HB_SCRIPT_LYDIAN,
   /* Unicode-5.2 additions */
   HB_SCRIPT_AVESTAN,
   HB_SCRIPT_BAMUM,
   HB_SCRIPT_EGYPTIAN_HIEROGLYPHS,
   HB_SCRIPT_IMPERIAL_ARAMAIC,
   HB_SCRIPT_INSCRIPTIONAL_PAHLAVI,
   HB_SCRIPT_INSCRIPTIONAL_PARTHIAN,
   HB_SCRIPT_JAVANESE,
   HB_SCRIPT_KAITHI,
   HB_SCRIPT_TAI_THAM,
   HB_SCRIPT_LISU,
   HB_SCRIPT_MEETEI_MAYEK,
   HB_SCRIPT_OLD_SOUTH_ARABIAN,
   HB_SCRIPT_OLD_TURKIC,
   HB_SCRIPT_SAMARITAN,
   HB_SCRIPT_TAI_VIET,
   /* Unicode-6.0 additions */
   HB_SCRIPT_BATAK,
   HB_SCRIPT_BRAHMI,
   HB_SCRIPT_MANDAIC,
   /* Unicode-6.1 additions */
   HB_SCRIPT_CHAKMA,
   HB_SCRIPT_MEROITIC_CURSIVE,
   HB_SCRIPT_MEROITIC_HIEROGLYPHS,
   HB_SCRIPT_MIAO,
   HB_SCRIPT_SHARADA,
   HB_SCRIPT_SORA_SOMPENG,
   HB_SCRIPT_TAKRI
 };
 #endif
 hb_script_t
 hb_glib_script_to_script (GUnicodeScript script)
 {
 #if GLIB_CHECK_VERSION(2,29,14)
   return (hb_script_t) g_unicode_script_to_iso15924 (script);
 #else
   if (likely ((unsigned int) script < ARRAY_LENGTH (glib_script_to_script)))
     return glib_script_to_script[script];
   if (unlikely (script == G_UNICODE_SCRIPT_INVALID_CODE))
     return HB_SCRIPT_INVALID;
   return HB_SCRIPT_UNKNOWN;
 #endif
 }
 GUnicodeScript
 hb_glib_script_from_script (hb_script_t script)
 {
 #if GLIB_CHECK_VERSION(2,29,14)
   return g_unicode_script_from_iso15924 (script);
 #else
   unsigned int count = ARRAY_LENGTH (glib_script_to_script);
   for (unsigned int i = 0; i < count; i++)
     if (glib_script_to_script[i] == script)
       return (GUnicodeScript) i;
   if (unlikely (script == HB_SCRIPT_INVALID))
     return G_UNICODE_SCRIPT_INVALID_CODE;
   return G_UNICODE_SCRIPT_UNKNOWN;
 #endif
 }
 static hb_unicode_combining_class_t
 hb_glib_unicode_combining_class (hb_unicode_funcs_t *ufuncs HB_UNUSED,
 				 hb_codepoint_t      unicode,
 				 void               *user_data HB_UNUSED)
 {
   return (hb_unicode_combining_class_t) g_unichar_combining_class (unicode);
 }
 static unsigned int
 hb_glib_unicode_eastasian_width (hb_unicode_funcs_t *ufuncs HB_UNUSED,
 				 hb_codepoint_t      unicode,
 				 void               *user_data HB_UNUSED)
 {
   return g_unichar_iswide (unicode) ? 2 : 1;
 }
 static hb_unicode_general_category_t
 hb_glib_unicode_general_category (hb_unicode_funcs_t *ufuncs HB_UNUSED,
 				  hb_codepoint_t      unicode,
 				  void               *user_data HB_UNUSED)
 {
   /* hb_unicode_general_category_t and GUnicodeType are identical */
   return (hb_unicode_general_category_t) g_unichar_type (unicode);
 }
 static hb_codepoint_t
 hb_glib_unicode_mirroring (hb_unicode_funcs_t *ufuncs HB_UNUSED,
 			   hb_codepoint_t      unicode,
 			   void               *user_data HB_UNUSED)
 {
   g_unichar_get_mirror_char (unicode, &unicode);
   return unicode;
 }
 static hb_script_t
 hb_glib_unicode_script (hb_unicode_funcs_t *ufuncs HB_UNUSED,
 			hb_codepoint_t      unicode,
 			void               *user_data HB_UNUSED)
 {
   return hb_glib_script_to_script (g_unichar_get_script (unicode));
 }
 static hb_bool_t
 hb_glib_unicode_compose (hb_unicode_funcs_t *ufuncs HB_UNUSED,
 			 hb_codepoint_t      a,
 			 hb_codepoint_t      b,
 			 hb_codepoint_t     *ab,
 			 void               *user_data HB_UNUSED)
 {
 #if GLIB_CHECK_VERSION(2,29,12)
   return g_unichar_compose (a, b, ab);
 #endif
   /* We don't ifdef-out the fallback code such that compiler always
    * sees it and makes sure it's compilable. */
   gchar utf8[12];
   gchar *normalized;
   int len;
   hb_bool_t ret;
   len = g_unichar_to_utf8 (a, utf8);
   len += g_unichar_to_utf8 (b, utf8 + len);
   normalized = g_utf8_normalize (utf8, len, G_NORMALIZE_NFC);
   len = g_utf8_strlen (normalized, -1);
   if (unlikely (!len))
     return false;
   if (len == 1) {
     *ab = g_utf8_get_char (normalized);
     ret = true;
   } else {
     ret = false;
   }
   g_free (normalized);
   return ret;
 }
 static hb_bool_t
 hb_glib_unicode_decompose (hb_unicode_funcs_t *ufuncs HB_UNUSED,
 			   hb_codepoint_t      ab,
 			   hb_codepoint_t     *a,
 			   hb_codepoint_t     *b,
 			   void               *user_data HB_UNUSED)
 {
 #if GLIB_CHECK_VERSION(2,29,12)
   return g_unichar_decompose (ab, a, b);
 #endif
   /* We don't ifdef-out the fallback code such that compiler always
    * sees it and makes sure it's compilable. */
   gchar utf8[6];
   gchar *normalized;
   int len;
   hb_bool_t ret;
   len = g_unichar_to_utf8 (ab, utf8);
   normalized = g_utf8_normalize (utf8, len, G_NORMALIZE_NFD);
   len = g_utf8_strlen (normalized, -1);
   if (unlikely (!len))
     return false;
   if (len == 1) {
     *a = g_utf8_get_char (normalized);
     *b = 0;
     ret = *a != ab;
   } else if (len == 2) {
     *a = g_utf8_get_char (normalized);
     *b = g_utf8_get_char (g_utf8_next_char (normalized));
     /* Here's the ugly part: if ab decomposes to a single character and
      * that character decomposes again, we have to detect that and undo
      * the second part :-(. */
     gchar *recomposed = g_utf8_normalize (normalized, -1, G_NORMALIZE_NFC);
     hb_codepoint_t c = g_utf8_get_char (recomposed);
     if (c != ab && c != *a) {
       *a = c;
       *b = 0;
     }
     g_free (recomposed);
     ret = true;
   } else {
     /* If decomposed to more than two characters, take the last one,
      * and recompose the rest to get the first component. */
     gchar *end = g_utf8_offset_to_pointer (normalized, len - 1);
     gchar *recomposed;
     *b = g_utf8_get_char (end);
     recomposed = g_utf8_normalize (normalized, end - normalized, G_NORMALIZE_NFC);
     /* We expect that recomposed has exactly one character now. */
     *a = g_utf8_get_char (recomposed);
     g_free (recomposed);
     ret = true;
   }
   g_free (normalized);
   return ret;
 }
 static unsigned int
 hb_glib_unicode_decompose_compatibility (hb_unicode_funcs_t *ufuncs HB_UNUSED,
 					 hb_codepoint_t      u,
 					 hb_codepoint_t     *decomposed,
 					 void               *user_data HB_UNUSED)
 {
 #if GLIB_CHECK_VERSION(2,29,12)
   return g_unichar_fully_decompose (u, TRUE, decomposed, HB_UNICODE_MAX_DECOMPOSITION_LEN);
 #endif
   /* If the user doesn't have GLib >= 2.29.12 we have to perform
    * a round trip to UTF-8 and the associated memory management dance. */
   gchar utf8[6];
   gchar *utf8_decomposed, *c;
   gsize utf8_len, utf8_decomposed_len, i;
   /* Convert @u to UTF-8 and normalise it in NFKD mode. This performs the compatibility decomposition. */
   utf8_len = g_unichar_to_utf8 (u, utf8);
   utf8_decomposed = g_utf8_normalize (utf8, utf8_len, G_NORMALIZE_NFKD);
   utf8_decomposed_len = g_utf8_strlen (utf8_decomposed, -1);
   assert (utf8_decomposed_len <= HB_UNICODE_MAX_DECOMPOSITION_LEN);
   for (i = 0, c = utf8_decomposed; i < utf8_decomposed_len; i++, c = g_utf8_next_char (c))
     *decomposed++ = g_utf8_get_char (c);
   g_free (utf8_decomposed);
   return utf8_decomposed_len;
 }
 hb_unicode_funcs_t *
 hb_glib_get_unicode_funcs (void)
 {
   static const hb_unicode_funcs_t _hb_glib_unicode_funcs = {
     HB_OBJECT_HEADER_STATIC,
     NULL, /* parent */
     true, /* immutable */
     {
 #define HB_UNICODE_FUNC_IMPLEMENT(name) hb_glib_unicode_##name,
       HB_UNICODE_FUNCS_IMPLEMENT_CALLBACKS
 #undef HB_UNICODE_FUNC_IMPLEMENT
     }
   };
   return const_cast<hb_unicode_funcs_t *> (&_hb_glib_unicode_funcs);
 }

The Tor Browser / annotate

gfx/harfbuzz/src/hb-glib.cc@129ffea94266 (annotated)

gfx/harfbuzz/src/hb-glib.cc