578 lines
14 KiB
C++
578 lines
14 KiB
C++
/*
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* Copyright © 2009 Red Hat, Inc.
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* Copyright © 2011 Codethink Limited
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* Copyright © 2010,2011,2012 Google, Inc.
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*
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* This is part of HarfBuzz, a text shaping library.
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*
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* Permission is hereby granted, without written agreement and without
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* license or royalty fees, to use, copy, modify, and distribute this
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* software and its documentation for any purpose, provided that the
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* above copyright notice and the following two paragraphs appear in
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* all copies of this software.
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*
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* IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR
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* DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES
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* ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN
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* IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH
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* DAMAGE.
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*
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* THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING,
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* BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
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* FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS
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* ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO
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* PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
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*
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* Red Hat Author(s): Behdad Esfahbod
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* Codethink Author(s): Ryan Lortie
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* Google Author(s): Behdad Esfahbod
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*/
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#include "hb.hh"
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#include "hb-unicode.hh"
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/**
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* SECTION: hb-unicode
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* @title: hb-unicode
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* @short_description: Unicode character property access
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* @include: hb.h
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*
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* Unicode functions are used to access Unicode character properties.
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* Client can pass its own Unicode functions to HarfBuzz, or access
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* the built-in Unicode functions that come with HarfBuzz.
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*
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* With the Unicode functions, one can query variour Unicode character
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* properties, such as General Category, Script, Combining Class, etc.
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**/
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/*
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* hb_unicode_funcs_t
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*/
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static hb_unicode_combining_class_t
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hb_unicode_combining_class_nil (hb_unicode_funcs_t *ufuncs HB_UNUSED,
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hb_codepoint_t unicode HB_UNUSED,
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void *user_data HB_UNUSED)
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{
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return HB_UNICODE_COMBINING_CLASS_NOT_REORDERED;
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}
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static unsigned int
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hb_unicode_eastasian_width_nil (hb_unicode_funcs_t *ufuncs HB_UNUSED,
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hb_codepoint_t unicode HB_UNUSED,
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void *user_data HB_UNUSED)
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{
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return 1;
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}
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static hb_unicode_general_category_t
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hb_unicode_general_category_nil (hb_unicode_funcs_t *ufuncs HB_UNUSED,
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hb_codepoint_t unicode HB_UNUSED,
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void *user_data HB_UNUSED)
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{
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return HB_UNICODE_GENERAL_CATEGORY_OTHER_LETTER;
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}
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static hb_codepoint_t
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hb_unicode_mirroring_nil (hb_unicode_funcs_t *ufuncs HB_UNUSED,
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hb_codepoint_t unicode,
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void *user_data HB_UNUSED)
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{
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return unicode;
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}
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static hb_script_t
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hb_unicode_script_nil (hb_unicode_funcs_t *ufuncs HB_UNUSED,
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hb_codepoint_t unicode HB_UNUSED,
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void *user_data HB_UNUSED)
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{
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return HB_SCRIPT_UNKNOWN;
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}
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static hb_bool_t
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hb_unicode_compose_nil (hb_unicode_funcs_t *ufuncs HB_UNUSED,
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hb_codepoint_t a HB_UNUSED,
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hb_codepoint_t b HB_UNUSED,
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hb_codepoint_t *ab HB_UNUSED,
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void *user_data HB_UNUSED)
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{
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return false;
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}
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static hb_bool_t
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hb_unicode_decompose_nil (hb_unicode_funcs_t *ufuncs HB_UNUSED,
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hb_codepoint_t ab HB_UNUSED,
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hb_codepoint_t *a HB_UNUSED,
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hb_codepoint_t *b HB_UNUSED,
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void *user_data HB_UNUSED)
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{
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return false;
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}
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static unsigned int
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hb_unicode_decompose_compatibility_nil (hb_unicode_funcs_t *ufuncs HB_UNUSED,
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hb_codepoint_t u HB_UNUSED,
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hb_codepoint_t *decomposed HB_UNUSED,
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void *user_data HB_UNUSED)
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{
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return 0;
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}
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extern "C" hb_unicode_funcs_t *hb_glib_get_unicode_funcs (void);
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extern "C" hb_unicode_funcs_t *hb_icu_get_unicode_funcs (void);
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extern "C" hb_unicode_funcs_t *hb_ucdn_get_unicode_funcs (void);
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hb_unicode_funcs_t *
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hb_unicode_funcs_get_default (void)
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{
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#if defined(HAVE_UCDN)
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return hb_ucdn_get_unicode_funcs ();
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#elif defined(HAVE_GLIB)
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return hb_glib_get_unicode_funcs ();
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#elif defined(HAVE_ICU) && defined(HAVE_ICU_BUILTIN)
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return hb_icu_get_unicode_funcs ();
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#else
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#define HB_UNICODE_FUNCS_NIL 1
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return hb_unicode_funcs_get_empty ();
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#endif
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}
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#if !defined(HB_NO_UNICODE_FUNCS) && defined(HB_UNICODE_FUNCS_NIL)
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#error "Could not find any Unicode functions implementation, you have to provide your own"
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#error "Consider building hb-ucdn.c. If you absolutely want to build without any, check the code."
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#endif
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/**
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* hb_unicode_funcs_create: (Xconstructor)
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* @parent: (nullable):
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*
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*
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*
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* Return value: (transfer full):
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*
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* Since: 0.9.2
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**/
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hb_unicode_funcs_t *
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hb_unicode_funcs_create (hb_unicode_funcs_t *parent)
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{
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hb_unicode_funcs_t *ufuncs;
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if (!(ufuncs = hb_object_create<hb_unicode_funcs_t> ()))
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return hb_unicode_funcs_get_empty ();
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if (!parent)
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parent = hb_unicode_funcs_get_empty ();
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hb_unicode_funcs_make_immutable (parent);
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ufuncs->parent = hb_unicode_funcs_reference (parent);
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ufuncs->func = parent->func;
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/* We can safely copy user_data from parent since we hold a reference
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* onto it and it's immutable. We should not copy the destroy notifiers
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* though. */
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ufuncs->user_data = parent->user_data;
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return ufuncs;
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}
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DEFINE_NULL_INSTANCE (hb_unicode_funcs_t) =
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{
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HB_OBJECT_HEADER_STATIC,
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nullptr, /* parent */
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{
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#define HB_UNICODE_FUNC_IMPLEMENT(name) hb_unicode_##name##_nil,
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HB_UNICODE_FUNCS_IMPLEMENT_CALLBACKS
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#undef HB_UNICODE_FUNC_IMPLEMENT
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}
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};
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/**
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* hb_unicode_funcs_get_empty:
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*
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*
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*
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* Return value: (transfer full):
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*
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* Since: 0.9.2
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**/
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hb_unicode_funcs_t *
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hb_unicode_funcs_get_empty (void)
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{
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return const_cast<hb_unicode_funcs_t *> (&Null(hb_unicode_funcs_t));
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}
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/**
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* hb_unicode_funcs_reference: (skip)
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* @ufuncs: Unicode functions.
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*
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*
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*
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* Return value: (transfer full):
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*
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* Since: 0.9.2
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**/
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hb_unicode_funcs_t *
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hb_unicode_funcs_reference (hb_unicode_funcs_t *ufuncs)
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{
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return hb_object_reference (ufuncs);
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}
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/**
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* hb_unicode_funcs_destroy: (skip)
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* @ufuncs: Unicode functions.
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*
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*
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*
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* Since: 0.9.2
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**/
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void
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hb_unicode_funcs_destroy (hb_unicode_funcs_t *ufuncs)
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{
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if (!hb_object_destroy (ufuncs)) return;
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#define HB_UNICODE_FUNC_IMPLEMENT(name) \
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if (ufuncs->destroy.name) ufuncs->destroy.name (ufuncs->user_data.name);
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HB_UNICODE_FUNCS_IMPLEMENT_CALLBACKS
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#undef HB_UNICODE_FUNC_IMPLEMENT
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hb_unicode_funcs_destroy (ufuncs->parent);
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free (ufuncs);
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}
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/**
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* hb_unicode_funcs_set_user_data: (skip)
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* @ufuncs: Unicode functions.
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* @key:
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* @data:
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* @destroy:
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* @replace:
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*
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*
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*
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* Return value:
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*
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* Since: 0.9.2
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**/
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hb_bool_t
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hb_unicode_funcs_set_user_data (hb_unicode_funcs_t *ufuncs,
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hb_user_data_key_t *key,
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void * data,
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hb_destroy_func_t destroy,
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hb_bool_t replace)
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{
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return hb_object_set_user_data (ufuncs, key, data, destroy, replace);
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}
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/**
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* hb_unicode_funcs_get_user_data: (skip)
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* @ufuncs: Unicode functions.
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* @key:
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*
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*
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*
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* Return value: (transfer none):
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*
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* Since: 0.9.2
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**/
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void *
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hb_unicode_funcs_get_user_data (hb_unicode_funcs_t *ufuncs,
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hb_user_data_key_t *key)
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{
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return hb_object_get_user_data (ufuncs, key);
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}
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/**
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* hb_unicode_funcs_make_immutable:
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* @ufuncs: Unicode functions.
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*
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*
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*
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* Since: 0.9.2
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**/
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void
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hb_unicode_funcs_make_immutable (hb_unicode_funcs_t *ufuncs)
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{
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if (hb_object_is_immutable (ufuncs))
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return;
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hb_object_make_immutable (ufuncs);
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}
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/**
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* hb_unicode_funcs_is_immutable:
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* @ufuncs: Unicode functions.
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*
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*
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*
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* Return value:
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*
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* Since: 0.9.2
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**/
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hb_bool_t
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hb_unicode_funcs_is_immutable (hb_unicode_funcs_t *ufuncs)
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{
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return hb_object_is_immutable (ufuncs);
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}
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/**
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* hb_unicode_funcs_get_parent:
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* @ufuncs: Unicode functions.
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*
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*
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*
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* Return value:
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*
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* Since: 0.9.2
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**/
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hb_unicode_funcs_t *
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hb_unicode_funcs_get_parent (hb_unicode_funcs_t *ufuncs)
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{
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return ufuncs->parent ? ufuncs->parent : hb_unicode_funcs_get_empty ();
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}
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#define HB_UNICODE_FUNC_IMPLEMENT(name) \
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\
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void \
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hb_unicode_funcs_set_##name##_func (hb_unicode_funcs_t *ufuncs, \
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hb_unicode_##name##_func_t func, \
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void *user_data, \
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hb_destroy_func_t destroy) \
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{ \
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if (hb_object_is_immutable (ufuncs)) \
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return; \
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\
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if (ufuncs->destroy.name) \
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ufuncs->destroy.name (ufuncs->user_data.name); \
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\
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if (func) { \
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ufuncs->func.name = func; \
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ufuncs->user_data.name = user_data; \
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ufuncs->destroy.name = destroy; \
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} else { \
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ufuncs->func.name = ufuncs->parent->func.name; \
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ufuncs->user_data.name = ufuncs->parent->user_data.name; \
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ufuncs->destroy.name = nullptr; \
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} \
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}
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HB_UNICODE_FUNCS_IMPLEMENT_CALLBACKS
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#undef HB_UNICODE_FUNC_IMPLEMENT
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#define HB_UNICODE_FUNC_IMPLEMENT(return_type, name) \
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\
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return_type \
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hb_unicode_##name (hb_unicode_funcs_t *ufuncs, \
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hb_codepoint_t unicode) \
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{ \
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return ufuncs->name (unicode); \
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}
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HB_UNICODE_FUNCS_IMPLEMENT_CALLBACKS_SIMPLE
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#undef HB_UNICODE_FUNC_IMPLEMENT
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/**
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* hb_unicode_compose:
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* @ufuncs: Unicode functions.
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* @a:
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* @b:
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* @ab: (out):
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*
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*
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*
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* Return value:
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*
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* Since: 0.9.2
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**/
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hb_bool_t
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hb_unicode_compose (hb_unicode_funcs_t *ufuncs,
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hb_codepoint_t a,
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hb_codepoint_t b,
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hb_codepoint_t *ab)
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{
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return ufuncs->compose (a, b, ab);
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}
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/**
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* hb_unicode_decompose:
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* @ufuncs: Unicode functions.
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* @ab:
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* @a: (out):
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* @b: (out):
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*
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*
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*
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* Return value:
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*
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* Since: 0.9.2
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**/
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hb_bool_t
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hb_unicode_decompose (hb_unicode_funcs_t *ufuncs,
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hb_codepoint_t ab,
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hb_codepoint_t *a,
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hb_codepoint_t *b)
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{
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return ufuncs->decompose (ab, a, b);
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}
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/**
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* hb_unicode_decompose_compatibility:
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* @ufuncs: Unicode functions.
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* @u:
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* @decomposed: (out):
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*
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*
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*
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* Return value:
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*
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* Since: 0.9.2
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* Deprecated: 2.0.0
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**/
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unsigned int
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hb_unicode_decompose_compatibility (hb_unicode_funcs_t *ufuncs,
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hb_codepoint_t u,
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hb_codepoint_t *decomposed)
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{
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return ufuncs->decompose_compatibility (u, decomposed);
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}
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/* See hb-unicode.hh for details. */
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const uint8_t
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_hb_modified_combining_class[256] =
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{
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0, /* HB_UNICODE_COMBINING_CLASS_NOT_REORDERED */
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1, /* HB_UNICODE_COMBINING_CLASS_OVERLAY */
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2, 3, 4, 5, 6,
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7, /* HB_UNICODE_COMBINING_CLASS_NUKTA */
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8, /* HB_UNICODE_COMBINING_CLASS_KANA_VOICING */
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9, /* HB_UNICODE_COMBINING_CLASS_VIRAMA */
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/* Hebrew */
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HB_MODIFIED_COMBINING_CLASS_CCC10,
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HB_MODIFIED_COMBINING_CLASS_CCC11,
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HB_MODIFIED_COMBINING_CLASS_CCC12,
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HB_MODIFIED_COMBINING_CLASS_CCC13,
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HB_MODIFIED_COMBINING_CLASS_CCC14,
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HB_MODIFIED_COMBINING_CLASS_CCC15,
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HB_MODIFIED_COMBINING_CLASS_CCC16,
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HB_MODIFIED_COMBINING_CLASS_CCC17,
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HB_MODIFIED_COMBINING_CLASS_CCC18,
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HB_MODIFIED_COMBINING_CLASS_CCC19,
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HB_MODIFIED_COMBINING_CLASS_CCC20,
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HB_MODIFIED_COMBINING_CLASS_CCC21,
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HB_MODIFIED_COMBINING_CLASS_CCC22,
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HB_MODIFIED_COMBINING_CLASS_CCC23,
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HB_MODIFIED_COMBINING_CLASS_CCC24,
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HB_MODIFIED_COMBINING_CLASS_CCC25,
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HB_MODIFIED_COMBINING_CLASS_CCC26,
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/* Arabic */
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HB_MODIFIED_COMBINING_CLASS_CCC27,
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HB_MODIFIED_COMBINING_CLASS_CCC28,
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HB_MODIFIED_COMBINING_CLASS_CCC29,
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HB_MODIFIED_COMBINING_CLASS_CCC30,
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HB_MODIFIED_COMBINING_CLASS_CCC31,
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HB_MODIFIED_COMBINING_CLASS_CCC32,
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HB_MODIFIED_COMBINING_CLASS_CCC33,
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HB_MODIFIED_COMBINING_CLASS_CCC34,
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HB_MODIFIED_COMBINING_CLASS_CCC35,
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/* Syriac */
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HB_MODIFIED_COMBINING_CLASS_CCC36,
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37, 38, 39,
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40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59,
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60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79,
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80, 81, 82, 83,
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/* Telugu */
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HB_MODIFIED_COMBINING_CLASS_CCC84,
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85, 86, 87, 88, 89, 90,
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HB_MODIFIED_COMBINING_CLASS_CCC91,
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92, 93, 94, 95, 96, 97, 98, 99, 100, 101, 102,
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/* Thai */
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HB_MODIFIED_COMBINING_CLASS_CCC103,
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104, 105, 106,
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HB_MODIFIED_COMBINING_CLASS_CCC107,
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108, 109, 110, 111, 112, 113, 114, 115, 116, 117,
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/* Lao */
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HB_MODIFIED_COMBINING_CLASS_CCC118,
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119, 120, 121,
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HB_MODIFIED_COMBINING_CLASS_CCC122,
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123, 124, 125, 126, 127, 128,
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|
|
/* Tibetan */
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|
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 */
|
|
};
|
|
|
|
|
|
/*
|
|
* Emoji
|
|
*/
|
|
|
|
#include "hb-unicode-emoji-table.hh"
|
|
|
|
bool
|
|
_hb_unicode_is_emoji_Extended_Pictographic (hb_codepoint_t cp)
|
|
{
|
|
return hb_bsearch (&cp, _hb_unicode_emoji_Extended_Pictographic_table,
|
|
ARRAY_LENGTH (_hb_unicode_emoji_Extended_Pictographic_table),
|
|
sizeof (hb_unicode_range_t),
|
|
hb_unicode_range_t::cmp);
|
|
}
|