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/*************************************************************************
** FontMap.cpp **
** **
** This file is part of dvisvgm -- the DVI to SVG converter **
** Copyright (C) 2005-2010 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 <fstream>
#include <iostream>
#include <vector>
#include "Directory.h"
#include "FontMap.h"
using namespace std;
enum FontMapFieldType {FM_ERROR=0, FM_NONE, FM_NAME, FM_PS_CODE, FM_HEADER, FM_ENC, FM_FONT};
static char* str_tolower (char *str);
static inline char* get_extension (char *fname);
static FontMapFieldType read_entry (char* &first, char* &last, bool name_only=false);
FontMap::FontMap (const string &fname) {
read(fname);
}
bool FontMap::read (const string &fname) {
ifstream ifs(fname.c_str());
if (ifs) {
if (fname.find("dvipdfm") != string::npos)
readPdfMap(ifs);
else
readPsMap(ifs);
return true;
}
return false;
}
/** Read map file in dvips format.
* @param[in] is data is read from this stream */
void FontMap::readPsMap (istream &is) {
char buf[512];
while (is && !is.eof()) {
is.getline(buf, 512);
if (!buf[0] || strchr(" %#;*", buf[0])) // comment?
continue;
char *first=buf, *last=buf, *end=buf+is.gcount()-1;
MapEntry entry;
string name;
while (last < end && *first) {
last = first;
switch (read_entry(first, last)) {
case FM_NAME:
if (name.empty())
name = first;
break;
case FM_ENC:
entry.encname = first; break;
case FM_FONT:
entry.fontname = first; break;
case FM_ERROR:
continue;
default:
break;
}
first = last+1;
}
// strip filename suffix
size_t len;
if ((len = entry.encname.length()) > 4 && entry.encname.substr(len-4) == ".enc")
entry.encname = entry.encname.substr(0, len-4);
if ((len = entry.fontname.length()) > 4 && entry.fontname[len-4] == '.')
entry.fontname = entry.fontname.substr(0, len-4);
if (!name.empty() && ((name != entry.fontname && !entry.fontname.empty()) || !entry.encname.empty()))
_fontMap[name] = entry;
}
}
/** Read map file in dvipdfm format.
* <font name> [<encoding>|default|none] [<map target>] [options]
* The optional trailing dvipdfm-parameters -r, -e and -s are ignored.
* @param[in] is data is read from this stream */
void FontMap::readPdfMap (istream &is) {
char buf[512];
while (is && !is.eof()) {
is.getline(buf, 512);
if (!buf[0] || strchr(" %#;*", buf[0])) // comment?
continue;
char *first=buf, *last=buf, *end=buf+is.gcount()-1;
vector<string> fields;
for (int i=0; i < 3 && last < end && *first; i++) {
FontMapFieldType type = read_entry(first, last, true);
if (*first == '-')
break;
if (type == FM_NAME)
fields.push_back(first);
first = last+1;
}
if (fields.size() > 1 && (fields[1] == "default" || fields[1] == "none"))
fields[1].clear();
if (fields.size() < 2)
continue;
if ((fields.size() == 2 && fields[1].empty()) || (fields.size() == 3 && fields[1].empty() && fields[0] == fields[2]))
continue;
_fontMap[fields[0]].fontname = fields[fields.size() == 2 ? 0 : 2];
_fontMap[fields[0]].encname = fields[1];
}
}
static char* str_tolower (char *str) {
for (char *p=str; *p; p++)
*p = tolower(*p);
return str;
}
static inline char* get_extension (char *fname) {
if (char* p=strrchr(fname, '.'))
return p+1;
return 0;
}
/** Reads a single line entry.
* @param[in,out] first pointer to first char of entry
* @param[in,out] last pointer to last char of entry
* @param[in] name_only true, if special meanings of \" and < should be ignored
* @return entry type */
static FontMapFieldType read_entry (char* &first, char* &last, bool name_only) {
while (*first && isspace(*first))
first++;
if (!name_only) {
if (*first == '"') {
last = first+1;
while (*last && *last != '"')
last++;
if (*last == 0) // quote not closed => skip invalid line
return FM_ERROR;
return FM_PS_CODE;
}
else if (*first == '<') {
bool eval_prefix = true;
FontMapFieldType type=FM_HEADER;
first++;
if (isspace(*first)) {
first++;
eval_prefix = false;
}
else if (*first == '<' || *first == '[') {
type = (*first == '<') ? FM_FONT : FM_ENC;
first++;
}
if (read_entry(first, last, true) != FM_NAME)
return FM_ERROR;
if (type == FM_HEADER) {
if (char *ext = get_extension(first)) {
ext = str_tolower(ext);
if (strcmp(ext, "enc")==0)
return FM_ENC;
if (strcmp(ext, "pfb")==0 || strcmp(ext, "pfa")==0)
return FM_FONT;
}
}
return type;
}
}
last = first;
while (*last && !isspace(*last))
last++;
*last = 0;
return (first < last) ? FM_NAME : FM_NONE;
}
ostream& FontMap::write (ostream &os) const {
for (map<string,MapEntry>::const_iterator i=_fontMap.begin(); i != _fontMap.end(); ++i)
os << i->first << " -> " << i->second.fontname << " [" << i->second.encname << "]\n";
return os;
}
void FontMap::readdir (const string &dirname) {
Directory dir(dirname);
while (const char *fname = dir.read('f')) {
if (strlen(fname) >= 4 && strcmp(fname+strlen(fname)-4, ".map") == 0) {
string path = dirname + "/" + fname;
read(path.c_str());
}
}
}
/** 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 char* FontMap::lookup (const string &fontname) const {
ConstIterator it = _fontMap.find(fontname);
if (it == _fontMap.end())
return 0;
return it->second.fontname.c_str();
}
/** Returns the name of the assigned encoding for a given font.
* @param[in] fontname name of font whose encoding is returned
* @return name of encoding, 0 if there is no encoding assigned */
const char* FontMap::encoding (const string &fontname) const {
ConstIterator it = _fontMap.find(fontname);
if (it == _fontMap.end() || it->second.encname.empty())
return 0;
return it->second.encname.c_str();
}
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