Line data Source code
1 : /* GRAPHITE2 LICENSING
2 :
3 : Copyright 2010, SIL International
4 : All rights reserved.
5 :
6 : This library is free software; you can redistribute it and/or modify
7 : it under the terms of the GNU Lesser General Public License as published
8 : by the Free Software Foundation; either version 2.1 of License, or
9 : (at your option) any later version.
10 :
11 : This program is distributed in the hope that it will be useful,
12 : but WITHOUT ANY WARRANTY; without even the implied warranty of
13 : MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 : Lesser General Public License for more details.
15 :
16 : You should also have received a copy of the GNU Lesser General Public
17 : License along with this library in the file named "LICENSE".
18 : If not, write to the Free Software Foundation, 51 Franklin Street,
19 : Suite 500, Boston, MA 02110-1335, USA or visit their web page on the
20 : internet at http://www.fsf.org/licenses/lgpl.html.
21 :
22 : Alternatively, the contents of this file may be used under the terms of the
23 : Mozilla Public License (http://mozilla.org/MPL) or the GNU General Public
24 : License, as published by the Free Software Foundation, either version 2
25 : of the License or (at your option) any later version.
26 : */
27 : #include "graphite2/Segment.h"
28 : #include "inc/UtfCodec.h"
29 : #include "inc/Segment.h"
30 :
31 : using namespace graphite2;
32 :
33 : namespace
34 : {
35 :
36 0 : gr_segment* makeAndInitialize(const Font *font, const Face *face, uint32 script, const Features* pFeats/*must not be NULL*/, gr_encform enc, const void* pStart, size_t nChars, int dir)
37 : {
38 0 : if (script == 0x20202020) script = 0;
39 0 : else if ((script & 0x00FFFFFF) == 0x00202020) script = script & 0xFF000000;
40 0 : else if ((script & 0x0000FFFF) == 0x00002020) script = script & 0xFFFF0000;
41 0 : else if ((script & 0x000000FF) == 0x00000020) script = script & 0xFFFFFF00;
42 : // if (!font) return NULL;
43 0 : Segment* pRes=new Segment(nChars, face, script, dir);
44 :
45 :
46 0 : if (!pRes->read_text(face, pFeats, enc, pStart, nChars) || !pRes->runGraphite())
47 : {
48 0 : delete pRes;
49 0 : return NULL;
50 : }
51 0 : pRes->finalise(font, true);
52 :
53 0 : return static_cast<gr_segment*>(pRes);
54 : }
55 :
56 :
57 : }
58 :
59 :
60 : template <typename utf_iter>
61 0 : inline size_t count_unicode_chars(utf_iter first, const utf_iter last, const void **error)
62 : {
63 0 : size_t n_chars = 0;
64 0 : uint32 usv = 0;
65 :
66 0 : if (last)
67 : {
68 0 : for (;first != last; ++first, ++n_chars)
69 0 : if ((usv = *first) == 0 || first.error()) break;
70 : }
71 : else
72 : {
73 0 : while ((usv = *first) != 0 && !first.error())
74 : {
75 0 : ++first;
76 0 : ++n_chars;
77 : }
78 : }
79 :
80 0 : if (error) *error = first.error() ? first : 0;
81 0 : return n_chars;
82 : }
83 :
84 : extern "C" {
85 :
86 0 : size_t gr_count_unicode_characters(gr_encform enc, const void* buffer_begin, const void* buffer_end/*don't go on or past end, If NULL then ignored*/, const void** pError) //Also stops on nul. Any nul is not in the count
87 : {
88 0 : assert(buffer_begin);
89 :
90 0 : switch (enc)
91 : {
92 0 : case gr_utf8: return count_unicode_chars<utf8::const_iterator>(buffer_begin, buffer_end, pError); break;
93 0 : case gr_utf16: return count_unicode_chars<utf16::const_iterator>(buffer_begin, buffer_end, pError); break;
94 0 : case gr_utf32: return count_unicode_chars<utf32::const_iterator>(buffer_begin, buffer_end, pError); break;
95 0 : default: return 0;
96 : }
97 : }
98 :
99 :
100 0 : gr_segment* gr_make_seg(const gr_font *font, const gr_face *face, gr_uint32 script, const gr_feature_val* pFeats, gr_encform enc, const void* pStart, size_t nChars, int dir)
101 : {
102 0 : const gr_feature_val * tmp_feats = 0;
103 0 : if (pFeats == 0)
104 0 : pFeats = tmp_feats = static_cast<const gr_feature_val*>(face->theSill().cloneFeatures(0));
105 0 : gr_segment * seg = makeAndInitialize(font, face, script, pFeats, enc, pStart, nChars, dir);
106 0 : delete tmp_feats;
107 :
108 0 : return seg;
109 : }
110 :
111 :
112 0 : void gr_seg_destroy(gr_segment* p)
113 : {
114 0 : delete p;
115 0 : }
116 :
117 :
118 0 : float gr_seg_advance_X(const gr_segment* pSeg/*not NULL*/)
119 : {
120 0 : assert(pSeg);
121 0 : return pSeg->advance().x;
122 : }
123 :
124 :
125 0 : float gr_seg_advance_Y(const gr_segment* pSeg/*not NULL*/)
126 : {
127 0 : assert(pSeg);
128 0 : return pSeg->advance().y;
129 : }
130 :
131 :
132 0 : unsigned int gr_seg_n_cinfo(const gr_segment* pSeg/*not NULL*/)
133 : {
134 0 : assert(pSeg);
135 0 : return pSeg->charInfoCount();
136 : }
137 :
138 :
139 0 : const gr_char_info* gr_seg_cinfo(const gr_segment* pSeg/*not NULL*/, unsigned int index/*must be <number_of_CharInfo*/)
140 : {
141 0 : assert(pSeg);
142 0 : return static_cast<const gr_char_info*>(pSeg->charinfo(index));
143 : }
144 :
145 0 : unsigned int gr_seg_n_slots(const gr_segment* pSeg/*not NULL*/)
146 : {
147 0 : assert(pSeg);
148 0 : return pSeg->slotCount();
149 : }
150 :
151 0 : const gr_slot* gr_seg_first_slot(gr_segment* pSeg/*not NULL*/)
152 : {
153 0 : assert(pSeg);
154 0 : return static_cast<const gr_slot*>(pSeg->first());
155 : }
156 :
157 0 : const gr_slot* gr_seg_last_slot(gr_segment* pSeg/*not NULL*/)
158 : {
159 0 : assert(pSeg);
160 0 : return static_cast<const gr_slot*>(pSeg->last());
161 : }
162 :
163 0 : float gr_seg_justify(gr_segment* pSeg/*not NULL*/, const gr_slot* pSlot/*not NULL*/, const gr_font *pFont, double width, enum gr_justFlags flags, const gr_slot *pFirst, const gr_slot *pLast)
164 : {
165 0 : assert(pSeg);
166 0 : assert(pSlot);
167 0 : return pSeg->justify(const_cast<gr_slot *>(pSlot), pFont, float(width), justFlags(flags), const_cast<gr_slot *>(pFirst), const_cast<gr_slot *>(pLast));
168 : }
169 :
170 : } // extern "C"
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