360 lines
8.1 KiB
C
360 lines
8.1 KiB
C
/*
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* Copyright (C) 2009 Red Hat, 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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*/
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#include "hb-private.h"
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#include "hb-unicode-private.h"
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HB_BEGIN_DECLS
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/*
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* hb_unicode_funcs_t
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*/
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static hb_codepoint_t hb_unicode_get_mirroring_nil (hb_codepoint_t unicode) { return unicode; }
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static hb_category_t hb_unicode_get_general_category_nil (hb_codepoint_t unicode HB_UNUSED) { return HB_CATEGORY_OTHER_LETTER; }
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static hb_script_t hb_unicode_get_script_nil (hb_codepoint_t unicode HB_UNUSED) { return HB_SCRIPT_UNKNOWN; }
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static unsigned int hb_unicode_get_combining_class_nil (hb_codepoint_t unicode HB_UNUSED) { return 0; }
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static unsigned int hb_unicode_get_eastasian_width_nil (hb_codepoint_t unicode HB_UNUSED) { return 1; }
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hb_unicode_funcs_t _hb_unicode_funcs_nil = {
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HB_REFERENCE_COUNT_INVALID, /* ref_count */
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TRUE, /* immutable */
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{
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hb_unicode_get_general_category_nil,
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hb_unicode_get_combining_class_nil,
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hb_unicode_get_mirroring_nil,
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hb_unicode_get_script_nil,
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hb_unicode_get_eastasian_width_nil
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}
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};
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hb_unicode_funcs_t *
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hb_unicode_funcs_create (void)
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{
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hb_unicode_funcs_t *ufuncs;
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if (!HB_OBJECT_DO_CREATE (hb_unicode_funcs_t, ufuncs))
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return &_hb_unicode_funcs_nil;
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ufuncs->v = _hb_unicode_funcs_nil.v;
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return ufuncs;
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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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HB_OBJECT_DO_REFERENCE (ufuncs);
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}
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unsigned int
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hb_unicode_funcs_get_reference_count (hb_unicode_funcs_t *ufuncs)
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{
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HB_OBJECT_DO_GET_REFERENCE_COUNT (ufuncs);
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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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HB_OBJECT_DO_DESTROY (ufuncs);
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free (ufuncs);
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}
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hb_unicode_funcs_t *
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hb_unicode_funcs_copy (hb_unicode_funcs_t *other_ufuncs)
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{
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hb_unicode_funcs_t *ufuncs;
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if (!HB_OBJECT_DO_CREATE (hb_unicode_funcs_t, ufuncs))
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return &_hb_unicode_funcs_nil;
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ufuncs->v = other_ufuncs->v;
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return ufuncs;
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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_INERT (ufuncs))
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return;
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ufuncs->immutable = TRUE;
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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 ufuncs->immutable;
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}
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void
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hb_unicode_funcs_set_mirroring_func (hb_unicode_funcs_t *ufuncs,
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hb_unicode_get_mirroring_func_t mirroring_func)
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{
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if (ufuncs->immutable)
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return;
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ufuncs->v.get_mirroring = mirroring_func ? mirroring_func : hb_unicode_get_mirroring_nil;
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}
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void
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hb_unicode_funcs_set_general_category_func (hb_unicode_funcs_t *ufuncs,
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hb_unicode_get_general_category_func_t general_category_func)
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{
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if (ufuncs->immutable)
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return;
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ufuncs->v.get_general_category = general_category_func ? general_category_func : hb_unicode_get_general_category_nil;
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}
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void
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hb_unicode_funcs_set_script_func (hb_unicode_funcs_t *ufuncs,
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hb_unicode_get_script_func_t script_func)
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{
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if (ufuncs->immutable)
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return;
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ufuncs->v.get_script = script_func ? script_func : hb_unicode_get_script_nil;
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}
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void
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hb_unicode_funcs_set_combining_class_func (hb_unicode_funcs_t *ufuncs,
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hb_unicode_get_combining_class_func_t combining_class_func)
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{
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if (ufuncs->immutable)
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return;
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ufuncs->v.get_combining_class = combining_class_func ? combining_class_func : hb_unicode_get_combining_class_nil;
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}
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void
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hb_unicode_funcs_set_eastasian_width_func (hb_unicode_funcs_t *ufuncs,
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hb_unicode_get_eastasian_width_func_t eastasian_width_func)
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{
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if (ufuncs->immutable)
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return;
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ufuncs->v.get_eastasian_width = eastasian_width_func ? eastasian_width_func : hb_unicode_get_eastasian_width_nil;
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}
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hb_unicode_get_mirroring_func_t
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hb_unicode_funcs_get_mirroring_func (hb_unicode_funcs_t *ufuncs)
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{
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return ufuncs->v.get_mirroring;
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}
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hb_unicode_get_general_category_func_t
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hb_unicode_funcs_get_general_category_func (hb_unicode_funcs_t *ufuncs)
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{
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return ufuncs->v.get_general_category;
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}
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hb_unicode_get_script_func_t
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hb_unicode_funcs_get_script_func (hb_unicode_funcs_t *ufuncs)
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{
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return ufuncs->v.get_script;
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}
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hb_unicode_get_combining_class_func_t
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hb_unicode_funcs_get_combining_class_func (hb_unicode_funcs_t *ufuncs)
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{
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return ufuncs->v.get_combining_class;
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}
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hb_unicode_get_eastasian_width_func_t
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hb_unicode_funcs_get_eastasian_width_func (hb_unicode_funcs_t *ufuncs)
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{
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return ufuncs->v.get_eastasian_width;
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}
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hb_codepoint_t
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hb_unicode_get_mirroring (hb_unicode_funcs_t *ufuncs,
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hb_codepoint_t unicode)
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{
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return ufuncs->v.get_mirroring (unicode);
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}
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hb_category_t
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hb_unicode_get_general_category (hb_unicode_funcs_t *ufuncs,
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hb_codepoint_t unicode)
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{
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return ufuncs->v.get_general_category (unicode);
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}
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hb_script_t
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hb_unicode_get_script (hb_unicode_funcs_t *ufuncs,
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hb_codepoint_t unicode)
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{
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return ufuncs->v.get_script (unicode);
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}
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unsigned int
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hb_unicode_get_combining_class (hb_unicode_funcs_t *ufuncs,
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hb_codepoint_t unicode)
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{
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return ufuncs->v.get_combining_class (unicode);
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}
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unsigned int
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hb_unicode_get_eastasian_width (hb_unicode_funcs_t *ufuncs,
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hb_codepoint_t unicode)
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{
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return ufuncs->v.get_eastasian_width (unicode);
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}
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#define LTR HB_DIRECTION_LTR
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#define RTL HB_DIRECTION_RTL
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const hb_direction_t horiz_dir[] =
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{
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LTR, /* Zyyy */
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LTR, /* Qaai */
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RTL, /* Arab */
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LTR, /* Armn */
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LTR, /* Beng */
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LTR, /* Bopo */
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LTR, /* Cher */
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LTR, /* Qaac */
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LTR, /* Cyrl (Cyrs) */
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LTR, /* Dsrt */
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LTR, /* Deva */
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LTR, /* Ethi */
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LTR, /* Geor (Geon, Geoa) */
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LTR, /* Goth */
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LTR, /* Grek */
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LTR, /* Gujr */
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LTR, /* Guru */
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LTR, /* Hani */
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LTR, /* Hang */
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RTL, /* Hebr */
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LTR, /* Hira */
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LTR, /* Knda */
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LTR, /* Kana */
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LTR, /* Khmr */
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LTR, /* Laoo */
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LTR, /* Latn (Latf, Latg) */
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LTR, /* Mlym */
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LTR, /* Mong */
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LTR, /* Mymr */
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LTR, /* Ogam */
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LTR, /* Ital */
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LTR, /* Orya */
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LTR, /* Runr */
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LTR, /* Sinh */
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RTL, /* Syrc (Syrj, Syrn, Syre) */
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LTR, /* Taml */
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LTR, /* Telu */
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RTL, /* Thaa */
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LTR, /* Thai */
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LTR, /* Tibt */
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LTR, /* Cans */
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LTR, /* Yiii */
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LTR, /* Tglg */
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LTR, /* Hano */
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LTR, /* Buhd */
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LTR, /* Tagb */
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/* Unicode-4.0 additions */
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LTR, /* Brai */
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RTL, /* Cprt */
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LTR, /* Limb */
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LTR, /* Osma */
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LTR, /* Shaw */
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LTR, /* Linb */
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LTR, /* Tale */
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LTR, /* Ugar */
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/* Unicode-4.1 additions */
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LTR, /* Talu */
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LTR, /* Bugi */
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LTR, /* Glag */
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LTR, /* Tfng */
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LTR, /* Sylo */
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LTR, /* Xpeo */
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LTR, /* Khar */
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/* Unicode-5.0 additions */
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LTR, /* Zzzz */
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LTR, /* Bali */
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LTR, /* Xsux */
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RTL, /* Phnx */
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LTR, /* Phag */
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RTL, /* Nkoo */
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/* Unicode-5.1 additions */
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LTR, /* Kali */
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LTR, /* Lepc */
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LTR, /* Rjng */
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LTR, /* Sund */
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LTR, /* Saur */
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LTR, /* Cham */
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LTR, /* Olck */
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LTR, /* Vaii */
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LTR, /* Cari */
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LTR, /* Lyci */
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LTR, /* Lydi */
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/* Unicode-5.2 additions */
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RTL, /* Avst */
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LTR, /* Bamu */
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LTR, /* Egyp */
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RTL, /* Armi */
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RTL, /* Phli */
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RTL, /* Prti */
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LTR, /* Java */
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LTR, /* Kthi */
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LTR, /* Lisu */
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LTR, /* Mtei */
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RTL, /* Sarb */
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RTL, /* Orkh */
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RTL, /* Samr */
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LTR, /* Lana */
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LTR /* Tavt */
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};
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#undef LTR
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#undef RTL
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hb_direction_t
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_hb_script_get_horizontal_direction (hb_script_t script)
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{
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if (unlikely ((unsigned int) script >= ARRAY_LENGTH (horiz_dir)))
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return HB_DIRECTION_LTR;
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return horiz_dir[script];
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}
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HB_END_DECLS
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