summaryrefslogtreecommitdiff
path: root/Build/source/texk/dvisvgm/dvisvgm-src/src/FontMap.cpp
blob: 85bb428b7c512a8f7ac8ea366565eb0cbf17e5c5 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
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
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
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
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
/*************************************************************************
** FontMap.cpp                                                          **
**                                                                      **
** This file is part of dvisvgm -- a fast DVI to SVG converter          **
** Copyright (C) 2005-2018 Martin Gieseking <martin.gieseking@uos.de>   **
**                                                                      **
** This program is free software; you can redistribute it and/or        **
** modify it under the terms of the GNU General Public License as       **
** published by the Free Software Foundation; either version 3 of       **
** the License, or (at your option) any later version.                  **
**                                                                      **
** This program is distributed in the hope that it will be useful, but  **
** WITHOUT ANY WARRANTY; without even the implied warranty of           **
** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the         **
** GNU General Public License for more details.                         **
**                                                                      **
** You should have received a copy of the GNU General Public License    **
** along with this program; if not, see <http://www.gnu.org/licenses/>. **
*************************************************************************/

#include <algorithm>
#include <cstring>
#include <fstream>
#include <limits>
#include <vector>
#include "CMap.hpp"
#include "Directory.hpp"
#include "FileFinder.hpp"
#include "FontManager.hpp"
#include "FontMap.hpp"
#include "MapLine.hpp"
#include "Message.hpp"
#include "Subfont.hpp"
#include "utility.hpp"

using namespace std;

/** Returns the singleton instance. */
FontMap& FontMap::instance() {
	static FontMap fontmap;
	return fontmap;
}


/** Reads and evaluates a single font map file.
 *  @param[in] fname name of map file to read
 *  @param[in] mode selects how to integrate the map file entries into the global map tree
 *  @return true if file could be opened */
bool FontMap::read (const string &fname, FontMap::Mode mode) {
	ifstream ifs(fname);
	if (!ifs)
		return false;

	int line_number = 1;
	while (ifs) {
		int c = ifs.peek();
		if (c < 0 || strchr("\n&#%;*", c))  // comment or empty line?
			ifs.ignore(numeric_limits<int>::max(), '\n');
		else {
			try {
				MapLine mapline(ifs);
				apply(mapline, mode);
			}
			catch (const MapLineException &e) {
				Message::wstream(true) << fname << ", line " << line_number << ": " << e.what() << '\n';
			}
			catch (const SubfontException &e) {
				Message::wstream(true) << e.filename();
				if (e.lineno() > 0)
					Message::wstream(false) << ", line " << e.lineno();
				Message::wstream(false) << e.what() << '\n';
			}
		}
		line_number++;
	}
	return true;
}


bool FontMap::read (const string &fname, char modechar) {
	Mode mode;
	switch (modechar) {
		case '=': mode = Mode::REPLACE; break;
		case '-': mode = Mode::REMOVE; break;
		default : mode = Mode::APPEND;
	}
	return read(fname, mode);
}


/** Applies a mapline according to the given mode (append, remove, replace).
 *  @param[in] mapline the mapline to be applied
 *  @param[in] mode mode to use
 *  @return true in case of success */
bool FontMap::apply (const MapLine& mapline, FontMap::Mode mode) {
	switch (mode) {
		case Mode::APPEND:
			return append(mapline);
		case Mode::REMOVE:
			return remove(mapline);
		default:
			return replace(mapline);
	}
}


/** Applies a mapline according to the given mode (append, remove, replace).
 *  @param[in] mapline the mapline to be applied
 *  @param[in] modechar character that denotes the mode (+, -, or =)
 *  @return true in case of success */
bool FontMap::apply (const MapLine& mapline, char modechar) {
	Mode mode;
	switch (modechar) {
		case '=': mode = Mode::REPLACE; break;
		case '-': mode = Mode::REMOVE; break;
		default : mode = Mode::APPEND;
	}
	return apply(mapline, mode);
}


/** Reads and evaluates a sequence of map files. Each map file is looked up in the local
 *  directory and the TeX file tree.
 *  @param[in] fname_seq comma-separated list of map file names
 *  @return true if at least one of the given map files was found */
bool FontMap::read (const string &fname_seq) {
	bool found = false;
	size_t left=0;
	while (left < fname_seq.length()) {
		const char modechar = fname_seq[left];
		if (strchr("+-=", modechar))
			left++;
		string fname;
		size_t right = fname_seq.find(',', left);
		if (right != string::npos)
			fname = fname_seq.substr(left, right-left);
		else {
			fname = fname_seq.substr(left);
			right = fname_seq.length();
		}
		if (!fname.empty()) {
			if (!read(fname, modechar)) {
				if (const char *path = FileFinder::instance().lookup(fname, false))
					found = found || read(path, modechar);
				else
					Message::wstream(true) << "map file " << fname << " not found\n";
			}
		}
		left = right+1;
	}
	return found;
}


/** Appends given map line data to the font map if there is no entry for the corresponding
 *  font in the map yet.
 *  @param[in] mapline parsed font data
 *  @return true if data has been appended */
bool FontMap::append (const MapLine &mapline) {
	bool appended = false;
	if (!mapline.texname().empty()) {
		if (!mapline.fontfname().empty() || !mapline.encname().empty()) {
			vector<Subfont*> subfonts;
			if (mapline.sfd())
				mapline.sfd()->subfonts(subfonts);
			else
				subfonts.push_back(nullptr);
			for (Subfont *subfont : subfonts) {
				string fontname = mapline.texname()+(subfont ? subfont->id() : "");
				auto it = _entries.find(fontname);
				if (it == _entries.end()) {
					_entries.emplace(fontname, util::make_unique<Entry>(mapline, subfont));
					appended = true;
				}
			}
		}
	}
	return appended;
}


/** Replaces the map data of the given font.
 *  If the font is locked (because it's already in use) nothing happens.
 *  @param[in] mapline parsed font data
 *  @return true if data has been replaced */
bool FontMap::replace (const MapLine &mapline) {
	if (mapline.texname().empty())
		return false;
	if (mapline.fontfname().empty() && mapline.encname().empty())
		return remove(mapline);

	vector<Subfont*> subfonts;
	if (mapline.sfd())
		mapline.sfd()->subfonts(subfonts);
	else
		subfonts.push_back(nullptr);
	for (Subfont *subfont : subfonts) {
		string fontname = mapline.texname()+(subfont ? subfont->id() : "");
		auto it = _entries.find(fontname);
		if (it == _entries.end())
			_entries.emplace(fontname, util::make_unique<Entry>(mapline, subfont));
		else if (!it->second->locked)
			*it->second = Entry(mapline, subfont);
	}
	return true;
}


/** Removes the map entry of the given font.
 *  If the font is locked (because it's already in use) nothing happens.
 *  @param[in] mapline parsed font data
 *  @return true if entry has been removed */
bool FontMap::remove (const MapLine &mapline) {
	bool removed = false;
	if (!mapline.texname().empty()) {
		vector<Subfont*> subfonts;
		if (mapline.sfd())
			mapline.sfd()->subfonts(subfonts);
		else
			subfonts.push_back(nullptr);
		for (const Subfont *subfont : subfonts) {
			string fontname = mapline.texname()+(subfont ? subfont->id() : "");
			auto it = _entries.find(fontname);
			if (it != _entries.end() && !it->second->locked) {
				_entries.erase(it);
				removed = true;
			}
		}
	}
	return removed;
}


ostream& FontMap::write (ostream &os) const {
	for (const auto &entry : _entries)
		os << entry.first << " -> " << entry.second->fontname << " [" << entry.second->encname << "]\n";
	return os;
}


/** Reads and evaluates all map files in the given directory.
 *  @param[in] dirname path to directory containing the map files to be read */
void FontMap::readdir (const string &dirname) {
	Directory dir(dirname);
	while (const char *fname = dir.read(Directory::ET_FILE)) {
		if (strlen(fname) >= 4 && strcmp(fname+strlen(fname)-4, ".map") == 0) {
			string path = dirname + "/" + fname;
			read(path);
		}
	}
}


/** Returns name of font that is mapped to a given font.
 * @param[in] fontname name of font whose mapped name is retrieved
 * @returns name of mapped font */
const FontMap::Entry* FontMap::lookup (const string &fontname) const {
	auto it = _entries.find(fontname);
	if (it == _entries.end())
		return nullptr;
	return it->second.get();
}


/** Sets the lock flag for the given font in order to avoid changing the map data of this font.
 *  @param[in] fontname name of font to be locked */
void FontMap::lockFont (const string& fontname) {
	auto it = _entries.find(fontname);
	if (it != _entries.end())
		it->second->locked = true;
}


/** Removes all (unlocked) entries from the font map.
 *  @param[in] unlocked_only if true, only unlocked entries are removed */
void FontMap::clear (bool unlocked_only) {
	if (!unlocked_only)
		_entries.clear();
	else {
		auto it=_entries.begin();
		while (it != _entries.end()) {
			if (it->second->locked)
				++it;
			else
				it = _entries.erase(it);
		}
	}
}

/////////////////////////////////////////////////

FontMap::Entry::Entry (const MapLine &mapline, Subfont *sf)
	: fontname(mapline.fontfname()), encname(mapline.encname()), subfont(sf), fontindex(mapline.fontindex()),
	  locked(false), style(mapline.bold(), mapline.extend(), mapline.slant())
{
}