From 2aa4a82499d4becd2284cdb482213d541b8804dd Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Sun, 28 Apr 2024 16:29:10 +0200 Subject: Adding upstream version 86.0.1. Signed-off-by: Daniel Baumann --- gfx/harfbuzz/src/hb-unicode.cc | 615 +++++++++++++++++++++++++++++++++++++++++ 1 file changed, 615 insertions(+) create mode 100644 gfx/harfbuzz/src/hb-unicode.cc (limited to 'gfx/harfbuzz/src/hb-unicode.cc') diff --git a/gfx/harfbuzz/src/hb-unicode.cc b/gfx/harfbuzz/src/hb-unicode.cc new file mode 100644 index 0000000000..d7f6a6e130 --- /dev/null +++ b/gfx/harfbuzz/src/hb-unicode.cc @@ -0,0 +1,615 @@ +/* + * Copyright © 2009 Red Hat, Inc. + * Copyright © 2011 Codethink Limited + * Copyright © 2010,2011,2012 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. + * + * Red Hat Author(s): Behdad Esfahbod + * Codethink Author(s): Ryan Lortie + * Google Author(s): Behdad Esfahbod + */ + +#include "hb.hh" + +#include "hb-unicode.hh" + + +/** + * SECTION: hb-unicode + * @title: hb-unicode + * @short_description: Unicode character property access + * @include: hb.h + * + * Unicode functions are used to access Unicode character properties. + * With these functions, client programs can query various properties from + * the Unicode Character Database for any code point, such as General + * Category (gc), Script (sc), Canonical Combining Class (ccc), etc. + * + * Client programs can optionally pass in their own Unicode functions + * that implement the same queries. The set of functions available is + * defined by the virtual methods in #hb_unicode_funcs_t. + * + * HarfBuzz provides built-in default functions for each method in + * #hb_unicode_funcs_t. + **/ + + +/* + * hb_unicode_funcs_t + */ + +static hb_unicode_combining_class_t +hb_unicode_combining_class_nil (hb_unicode_funcs_t *ufuncs HB_UNUSED, + hb_codepoint_t unicode HB_UNUSED, + void *user_data HB_UNUSED) +{ + return HB_UNICODE_COMBINING_CLASS_NOT_REORDERED; +} + +#ifndef HB_DISABLE_DEPRECATED +static unsigned int +hb_unicode_eastasian_width_nil (hb_unicode_funcs_t *ufuncs HB_UNUSED, + hb_codepoint_t unicode HB_UNUSED, + void *user_data HB_UNUSED) +{ + return 1; +} +#endif + +static hb_unicode_general_category_t +hb_unicode_general_category_nil (hb_unicode_funcs_t *ufuncs HB_UNUSED, + hb_codepoint_t unicode HB_UNUSED, + void *user_data HB_UNUSED) +{ + return HB_UNICODE_GENERAL_CATEGORY_OTHER_LETTER; +} + +static hb_codepoint_t +hb_unicode_mirroring_nil (hb_unicode_funcs_t *ufuncs HB_UNUSED, + hb_codepoint_t unicode, + void *user_data HB_UNUSED) +{ + return unicode; +} + +static hb_script_t +hb_unicode_script_nil (hb_unicode_funcs_t *ufuncs HB_UNUSED, + hb_codepoint_t unicode HB_UNUSED, + void *user_data HB_UNUSED) +{ + return HB_SCRIPT_UNKNOWN; +} + +static hb_bool_t +hb_unicode_compose_nil (hb_unicode_funcs_t *ufuncs HB_UNUSED, + hb_codepoint_t a HB_UNUSED, + hb_codepoint_t b HB_UNUSED, + hb_codepoint_t *ab HB_UNUSED, + void *user_data HB_UNUSED) +{ + return false; +} + +static hb_bool_t +hb_unicode_decompose_nil (hb_unicode_funcs_t *ufuncs HB_UNUSED, + hb_codepoint_t ab HB_UNUSED, + hb_codepoint_t *a HB_UNUSED, + hb_codepoint_t *b HB_UNUSED, + void *user_data HB_UNUSED) +{ + return false; +} + + +#ifndef HB_DISABLE_DEPRECATED +static unsigned int +hb_unicode_decompose_compatibility_nil (hb_unicode_funcs_t *ufuncs HB_UNUSED, + hb_codepoint_t u HB_UNUSED, + hb_codepoint_t *decomposed HB_UNUSED, + void *user_data HB_UNUSED) +{ + return 0; +} +#endif + +#if !defined(HB_NO_UNICODE_FUNCS) && defined(HAVE_GLIB) +#include "hb-glib.h" +#endif +#if !defined(HB_NO_UNICODE_FUNCS) && defined(HAVE_ICU) && defined(HAVE_ICU_BUILTIN) +#include "hb-icu.h" +#endif + +/** + * hb_unicode_funcs_get_default: + * + * Fetches a pointer to the default Unicode-functions structure that is used + * when no functions are explicitly set on #hb_buffer_t. + * + * Return value: (transfer none): a pointer to the #hb_unicode_funcs_t Unicode-functions structure + * + * Since: 0.9.2 + **/ +hb_unicode_funcs_t * +hb_unicode_funcs_get_default () +{ +#if !defined(HB_NO_UNICODE_FUNCS) && !defined(HB_NO_UCD) + return hb_ucd_get_unicode_funcs (); +#elif !defined(HB_NO_UNICODE_FUNCS) && defined(HAVE_GLIB) + return hb_glib_get_unicode_funcs (); +#elif !defined(HB_NO_UNICODE_FUNCS) && defined(HAVE_ICU) && defined(HAVE_ICU_BUILTIN) + return hb_icu_get_unicode_funcs (); +#else +#define HB_UNICODE_FUNCS_NIL 1 + return hb_unicode_funcs_get_empty (); +#endif +} + +#if !defined(HB_NO_UNICODE_FUNCS) && defined(HB_UNICODE_FUNCS_NIL) +#error "Could not find any Unicode functions implementation, you have to provide your own" +#error "Consider building hb-ucd.cc. If you absolutely want to build without any, check the code." +#endif + +/** + * hb_unicode_funcs_create: (Xconstructor) + * @parent: (nullable): Parent Unicode-functions structure + * + * Creates a new #hb_unicode_funcs_t structure of Unicode functions. + * + * Return value: (transfer full): The Unicode-functions structure + * + * Since: 0.9.2 + **/ +hb_unicode_funcs_t * +hb_unicode_funcs_create (hb_unicode_funcs_t *parent) +{ + hb_unicode_funcs_t *ufuncs; + + if (!(ufuncs = hb_object_create ())) + return hb_unicode_funcs_get_empty (); + + if (!parent) + parent = hb_unicode_funcs_get_empty (); + + hb_unicode_funcs_make_immutable (parent); + ufuncs->parent = hb_unicode_funcs_reference (parent); + + ufuncs->func = parent->func; + + /* We can safely copy user_data from parent since we hold a reference + * onto it and it's immutable. We should not copy the destroy notifiers + * though. */ + ufuncs->user_data = parent->user_data; + + return ufuncs; +} + + +DEFINE_NULL_INSTANCE (hb_unicode_funcs_t) = +{ + HB_OBJECT_HEADER_STATIC, + + nullptr, /* parent */ + { +#define HB_UNICODE_FUNC_IMPLEMENT(name) hb_unicode_##name##_nil, + HB_UNICODE_FUNCS_IMPLEMENT_CALLBACKS +#undef HB_UNICODE_FUNC_IMPLEMENT + } +}; + +/** + * hb_unicode_funcs_get_empty: + * + * Fetches the singleton empty Unicode-functions structure. + * + * Return value: (transfer full): The empty Unicode-functions structure + * + * Since: 0.9.2 + **/ +hb_unicode_funcs_t * +hb_unicode_funcs_get_empty () +{ + return const_cast (&Null (hb_unicode_funcs_t)); +} + +/** + * hb_unicode_funcs_reference: (skip) + * @ufuncs: The Unicode-functions structure + * + * Increases the reference count on a Unicode-functions structure. + * + * Return value: (transfer full): The Unicode-functions structure + * + * Since: 0.9.2 + **/ +hb_unicode_funcs_t * +hb_unicode_funcs_reference (hb_unicode_funcs_t *ufuncs) +{ + return hb_object_reference (ufuncs); +} + +/** + * hb_unicode_funcs_destroy: (skip) + * @ufuncs: The Unicode-functions structure + * + * Decreases the reference count on a Unicode-functions structure. When + * the reference count reaches zero, the Unicode-functions structure is + * destroyed, freeing all memory. + * + * Since: 0.9.2 + **/ +void +hb_unicode_funcs_destroy (hb_unicode_funcs_t *ufuncs) +{ + if (!hb_object_destroy (ufuncs)) return; + +#define HB_UNICODE_FUNC_IMPLEMENT(name) \ + if (ufuncs->destroy.name) ufuncs->destroy.name (ufuncs->user_data.name); + HB_UNICODE_FUNCS_IMPLEMENT_CALLBACKS +#undef HB_UNICODE_FUNC_IMPLEMENT + + hb_unicode_funcs_destroy (ufuncs->parent); + + free (ufuncs); +} + +/** + * hb_unicode_funcs_set_user_data: (skip) + * @ufuncs: The Unicode-functions structure + * @key: The user-data key + * @data: A pointer to the user data + * @destroy: (optional): A callback to call when @data is not needed anymore + * @replace: Whether to replace an existing data with the same key + * + * Attaches a user-data key/data pair to the specified Unicode-functions structure. + * + * Return value: %true if success, %false otherwise + * + * Since: 0.9.2 + **/ +hb_bool_t +hb_unicode_funcs_set_user_data (hb_unicode_funcs_t *ufuncs, + hb_user_data_key_t *key, + void * data, + hb_destroy_func_t destroy, + hb_bool_t replace) +{ + return hb_object_set_user_data (ufuncs, key, data, destroy, replace); +} + +/** + * hb_unicode_funcs_get_user_data: (skip) + * @ufuncs: The Unicode-functions structure + * @key: The user-data key to query + * + * Fetches the user-data associated with the specified key, + * attached to the specified Unicode-functions structure. + * + * Return value: (transfer none): A pointer to the user data + * + * Since: 0.9.2 + **/ +void * +hb_unicode_funcs_get_user_data (hb_unicode_funcs_t *ufuncs, + hb_user_data_key_t *key) +{ + return hb_object_get_user_data (ufuncs, key); +} + + +/** + * hb_unicode_funcs_make_immutable: + * @ufuncs: The Unicode-functions structure + * + * Makes the specified Unicode-functions structure + * immutable. + * + * Since: 0.9.2 + **/ +void +hb_unicode_funcs_make_immutable (hb_unicode_funcs_t *ufuncs) +{ + if (hb_object_is_immutable (ufuncs)) + return; + + hb_object_make_immutable (ufuncs); +} + +/** + * hb_unicode_funcs_is_immutable: + * @ufuncs: The Unicode-functions structure + * + * Tests whether the specified Unicode-functions structure + * is immutable. + * + * Return value: %true if @ufuncs is immutable, false otherwise + * + * Since: 0.9.2 + **/ +hb_bool_t +hb_unicode_funcs_is_immutable (hb_unicode_funcs_t *ufuncs) +{ + return hb_object_is_immutable (ufuncs); +} + +/** + * hb_unicode_funcs_get_parent: + * @ufuncs: The Unicode-functions structure + * + * Fetches the parent of the Unicode-functions structure + * @ufuncs. + * + * Return value: The parent Unicode-functions structure + * + * Since: 0.9.2 + **/ +hb_unicode_funcs_t * +hb_unicode_funcs_get_parent (hb_unicode_funcs_t *ufuncs) +{ + return ufuncs->parent ? ufuncs->parent : hb_unicode_funcs_get_empty (); +} + + +#define HB_UNICODE_FUNC_IMPLEMENT(name) \ + \ +void \ +hb_unicode_funcs_set_##name##_func (hb_unicode_funcs_t *ufuncs, \ + hb_unicode_##name##_func_t func, \ + void *user_data, \ + hb_destroy_func_t destroy) \ +{ \ + if (hb_object_is_immutable (ufuncs)) \ + return; \ + \ + if (ufuncs->destroy.name) \ + ufuncs->destroy.name (ufuncs->user_data.name); \ + \ + if (func) { \ + ufuncs->func.name = func; \ + ufuncs->user_data.name = user_data; \ + ufuncs->destroy.name = destroy; \ + } else { \ + ufuncs->func.name = ufuncs->parent->func.name; \ + ufuncs->user_data.name = ufuncs->parent->user_data.name; \ + ufuncs->destroy.name = nullptr; \ + } \ +} + +HB_UNICODE_FUNCS_IMPLEMENT_CALLBACKS +#undef HB_UNICODE_FUNC_IMPLEMENT + + +#define HB_UNICODE_FUNC_IMPLEMENT(return_type, name) \ + \ +return_type \ +hb_unicode_##name (hb_unicode_funcs_t *ufuncs, \ + hb_codepoint_t unicode) \ +{ \ + return ufuncs->name (unicode); \ +} +HB_UNICODE_FUNCS_IMPLEMENT_CALLBACKS_SIMPLE +#undef HB_UNICODE_FUNC_IMPLEMENT + +/** + * hb_unicode_compose: + * @ufuncs: The Unicode-functions structure + * @a: The first Unicode code point to compose + * @b: The second Unicode code point to compose + * @ab: (out): The composition of @a, @b + * + * Fetches the composition of a sequence of two Unicode + * code points. + * + * Calls the composition function of the specified + * Unicode-functions structure @ufuncs. + * + * Return value: %true if @a and @b composed, false otherwise + * + * Since: 0.9.2 + **/ +hb_bool_t +hb_unicode_compose (hb_unicode_funcs_t *ufuncs, + hb_codepoint_t a, + hb_codepoint_t b, + hb_codepoint_t *ab) +{ + return ufuncs->compose (a, b, ab); +} + +/** + * hb_unicode_decompose: + * @ufuncs: The Unicode-functions structure + * @ab: Unicode code point to decompose + * @a: (out): The first code point of the decomposition of @ab + * @b: (out): The second code point of the decomposition of @ab + * + * Fetches the decomposition of a Unicode code point. + * + * Calls the decomposition function of the specified + * Unicode-functions structure @ufuncs. + * + * Return value: %true if @ab was decomposed, false otherwise + * + * Since: 0.9.2 + **/ +hb_bool_t +hb_unicode_decompose (hb_unicode_funcs_t *ufuncs, + hb_codepoint_t ab, + hb_codepoint_t *a, + hb_codepoint_t *b) +{ + return ufuncs->decompose (ab, a, b); +} + +#ifndef HB_DISABLE_DEPRECATED +/** + * hb_unicode_decompose_compatibility: + * @ufuncs: The Unicode-functions structure + * @u: Code point to decompose + * @decomposed: (out): Compatibility decomposition of @u + * + * Fetches the compatibility decomposition of a Unicode + * code point. Deprecated. + * + * Return value: + * + * Since: 0.9.2 + * Deprecated: 2.0.0 + **/ +unsigned int +hb_unicode_decompose_compatibility (hb_unicode_funcs_t *ufuncs, + hb_codepoint_t u, + hb_codepoint_t *decomposed) +{ + return ufuncs->decompose_compatibility (u, decomposed); +} +#endif + + +#ifndef HB_NO_OT_SHAPE +/* See hb-unicode.hh for details. */ +const uint8_t +_hb_modified_combining_class[256] = +{ + 0, /* HB_UNICODE_COMBINING_CLASS_NOT_REORDERED */ + 1, /* HB_UNICODE_COMBINING_CLASS_OVERLAY */ + 2, 3, 4, 5, 6, + 7, /* HB_UNICODE_COMBINING_CLASS_NUKTA */ + 8, /* HB_UNICODE_COMBINING_CLASS_KANA_VOICING */ + 9, /* HB_UNICODE_COMBINING_CLASS_VIRAMA */ + + /* Hebrew */ + HB_MODIFIED_COMBINING_CLASS_CCC10, + HB_MODIFIED_COMBINING_CLASS_CCC11, + HB_MODIFIED_COMBINING_CLASS_CCC12, + HB_MODIFIED_COMBINING_CLASS_CCC13, + HB_MODIFIED_COMBINING_CLASS_CCC14, + HB_MODIFIED_COMBINING_CLASS_CCC15, + HB_MODIFIED_COMBINING_CLASS_CCC16, + HB_MODIFIED_COMBINING_CLASS_CCC17, + HB_MODIFIED_COMBINING_CLASS_CCC18, + HB_MODIFIED_COMBINING_CLASS_CCC19, + HB_MODIFIED_COMBINING_CLASS_CCC20, + HB_MODIFIED_COMBINING_CLASS_CCC21, + HB_MODIFIED_COMBINING_CLASS_CCC22, + HB_MODIFIED_COMBINING_CLASS_CCC23, + HB_MODIFIED_COMBINING_CLASS_CCC24, + HB_MODIFIED_COMBINING_CLASS_CCC25, + HB_MODIFIED_COMBINING_CLASS_CCC26, + + /* Arabic */ + HB_MODIFIED_COMBINING_CLASS_CCC27, + HB_MODIFIED_COMBINING_CLASS_CCC28, + HB_MODIFIED_COMBINING_CLASS_CCC29, + HB_MODIFIED_COMBINING_CLASS_CCC30, + HB_MODIFIED_COMBINING_CLASS_CCC31, + HB_MODIFIED_COMBINING_CLASS_CCC32, + HB_MODIFIED_COMBINING_CLASS_CCC33, + HB_MODIFIED_COMBINING_CLASS_CCC34, + HB_MODIFIED_COMBINING_CLASS_CCC35, + + /* Syriac */ + HB_MODIFIED_COMBINING_CLASS_CCC36, + + 37, 38, 39, + 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, + 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, + 80, 81, 82, 83, + + /* Telugu */ + HB_MODIFIED_COMBINING_CLASS_CCC84, + 85, 86, 87, 88, 89, 90, + HB_MODIFIED_COMBINING_CLASS_CCC91, + 92, 93, 94, 95, 96, 97, 98, 99, 100, 101, 102, + + /* Thai */ + HB_MODIFIED_COMBINING_CLASS_CCC103, + 104, 105, 106, + HB_MODIFIED_COMBINING_CLASS_CCC107, + 108, 109, 110, 111, 112, 113, 114, 115, 116, 117, + + /* Lao */ + HB_MODIFIED_COMBINING_CLASS_CCC118, + 119, 120, 121, + HB_MODIFIED_COMBINING_CLASS_CCC122, + 123, 124, 125, 126, 127, 128, + + /* Tibetan */ + HB_MODIFIED_COMBINING_CLASS_CCC129, + HB_MODIFIED_COMBINING_CLASS_CCC130, + 131, + HB_MODIFIED_COMBINING_CLASS_CCC132, + 133, 134, 135, 136, 137, 138, 139, + + + 140, 141, 142, 143, 144, 145, 146, 147, 148, 149, + 150, 151, 152, 153, 154, 155, 156, 157, 158, 159, + 160, 161, 162, 163, 164, 165, 166, 167, 168, 169, + 170, 171, 172, 173, 174, 175, 176, 177, 178, 179, + 180, 181, 182, 183, 184, 185, 186, 187, 188, 189, + 190, 191, 192, 193, 194, 195, 196, 197, 198, 199, + + 200, /* HB_UNICODE_COMBINING_CLASS_ATTACHED_BELOW_LEFT */ + 201, + 202, /* HB_UNICODE_COMBINING_CLASS_ATTACHED_BELOW */ + 203, 204, 205, 206, 207, 208, 209, 210, 211, 212, 213, + 214, /* HB_UNICODE_COMBINING_CLASS_ATTACHED_ABOVE */ + 215, + 216, /* HB_UNICODE_COMBINING_CLASS_ATTACHED_ABOVE_RIGHT */ + 217, + 218, /* HB_UNICODE_COMBINING_CLASS_BELOW_LEFT */ + 219, + 220, /* HB_UNICODE_COMBINING_CLASS_BELOW */ + 221, + 222, /* HB_UNICODE_COMBINING_CLASS_BELOW_RIGHT */ + 223, + 224, /* HB_UNICODE_COMBINING_CLASS_LEFT */ + 225, + 226, /* HB_UNICODE_COMBINING_CLASS_RIGHT */ + 227, + 228, /* HB_UNICODE_COMBINING_CLASS_ABOVE_LEFT */ + 229, + 230, /* HB_UNICODE_COMBINING_CLASS_ABOVE */ + 231, + 232, /* HB_UNICODE_COMBINING_CLASS_ABOVE_RIGHT */ + 233, /* HB_UNICODE_COMBINING_CLASS_DOUBLE_BELOW */ + 234, /* HB_UNICODE_COMBINING_CLASS_DOUBLE_ABOVE */ + 235, 236, 237, 238, 239, + 240, /* HB_UNICODE_COMBINING_CLASS_IOTA_SUBSCRIPT */ + 241, 242, 243, 244, 245, 246, 247, 248, 249, 250, 251, 252, 253, 254, + 255, /* HB_UNICODE_COMBINING_CLASS_INVALID */ +}; +#endif + + +/* + * Emoji + */ +#ifndef HB_NO_EMOJI_SEQUENCES + +#include "hb-unicode-emoji-table.hh" + +bool +_hb_unicode_is_emoji_Extended_Pictographic (hb_codepoint_t cp) +{ + return _hb_emoji_is_Extended_Pictographic (cp); +} +#endif -- cgit v1.2.3