First shot at real code..

git-svn-id: svn://svn.lyx.org/lyx/lyx-devel/trunk@6091 a592a061-630c-0410-9148-cb99ea01b6c8
This commit is contained in:
André Pönitz 2003-02-11 12:37:27 +00:00
parent 90c39dc7ad
commit 34e1b432e3
2 changed files with 970 additions and 0 deletions

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include $(top_srcdir)/config/common.am
INCLUDES = -I$(srcdir)/../ $(BOOST_INCLUDES)
bin_PROGRAMS = tex2lyx
tex2lyx_SOURCES = tex2lyx.C

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src/tex2lyx/tex2lyx.C Normal file
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/** The .tex to .lyx converter
\author André Pönitz (2003)
*/
#include <config.h>
#include <algorithm>
#include <cctype>
#include <fstream>
#include <iostream>
#include <sstream>
#include <stack>
#include <string>
#include <vector>
using std::atoi;
using std::cout;
using std::cerr;
using std::endl;
using std::fill;
using std::getline;
using std::ios;
using std::istream;
using std::ostream;
using std::vector;
namespace {
char const OPEN = '<';
char const CLOSE = '>';
const char * known_languages[] = { "austrian", "babel", "bahasa",
"basque", "breton", "bulgarian", "catalan", "croatian", "czech", "danish",
"dutch", "english", "esperanto", "estonian", "finnish", "francais",
"frenchb", "galician", "germanb", "greek", "hebcal", "hebfont", "hebrew",
"hebrew_newcode", "hebrew_oldcode", "hebrew_p", "hyphen", "icelandic",
"irish", "italian", "latin", "lgrcmr", "lgrcmro", "lgrcmss", "lgrcmtt",
"lgrenc", "lgrlcmss", "lgrlcmtt", "lheclas", "lhecmr", "lhecmss",
"lhecmtt", "lhecrml", "lheenc", "lhefr", "lheredis", "lheshold",
"lheshscr", "lheshstk", "lsorbian", "magyar", "naustrian", "ngermanb",
"ngerman", "norsk", "polish", "portuges", "rlbabel", "romanian",
"russianb", "samin", "scottish", "serbian", "slovak", "slovene", "spanish",
"swedish", "turkish", "ukraineb", "usorbian", "welsh", 0};
const char * known_fontsizes[] = { "10pt", "11pt", "12pt", 0 };
// some ugly stuff
string h_preamble;
string h_textclass = "FIXME";
string h_options = "FIXME";
string h_language = "FIXME";
string h_inputencoding = "FIXME";
string h_fontscheme = "FIXME";
string h_graphics = "default";
string h_paperfontsize = "FIXME";
string h_spacing = "single";
string h_papersize = "FIXME";
string h_paperpackage = "FIXME";
string h_use_geometry = "0";
string h_use_amsmath = "0";
string h_use_natbib = "0";
string h_use_numerical_citations = "0";
string h_paperorientation = "portrait";
string h_secnumdepth = "3";
string h_tocdepth = "3";
string h_paragraph_separation = "indent";
string h_defskip = "medskip";
string h_quotes_language = "2";
string h_quotes_times = "1";
string h_papercolumns = "1";
string h_papersides = "1";
string h_paperpagestyle = "default";
string h_tracking_changes = "0";
// indicates whether we are in the preamble
bool in_preamble = true;
// current stack of nested environments
stack<string> active_environments;
void split(string const & s, vector<string> & result, char delim)
{
istringstream is(s);
string t;
while (getline(is, t, delim))
result.push_back(t);
}
string join(vector<string> const & input, char delim)
{
ostringstream os;
for (size_t i = 0; i != input.size(); ++i) {
if (i)
os << delim;
os << input[i];
}
return os.str();
}
void handle_opt(vector<string> & opts, char const ** what, string & target)
{
for ( ; what; ++what) {
vector<string>::iterator it = find(opts.begin(), opts.end(), *what);
if (it != opts.end()) {
//cerr << "### found option '" << *what << "'\n";
target = *what;
opts.erase(it);
return;
}
}
}
void handle_ert(ostream & os, string const & s)
{
os << "\n\\begin_inset ERT\nstatus Collapsed\n\n\\layout Standard\n\n";
os << s;
os << "\n\\end_inset\n";
}
string wrap(string const & cmd, string const & str)
{
return OPEN + cmd + ' ' + str + CLOSE;
}
string wrap(string const & cmd, string const & str, string const & str2)
{
return OPEN + cmd + ' ' + str + ' ' + str2 + CLOSE;
}
enum mode_type {UNDECIDED_MODE, TEXT_MODE, MATH_MODE};
mode_type asMode(mode_type oldmode, string const & str)
{
if (str == "mathmode")
return MATH_MODE;
if (str == "textmode" || str == "forcetext")
return TEXT_MODE;
return oldmode;
}
bool stared(string const & s)
{
string::size_type const n = s.size();
return n && s[n - 1] == '*';
}
// These are TeX's catcodes
enum CatCode {
catEscape, // 0 backslash
catBegin, // 1 {
catEnd, // 2 }
cat, // 3 $
catAlign, // 4 &
catNewline, // 5 ^^M
catParameter, // 6 #
catSuper, // 7 ^
catSub, // 8 _
catIgnore, // 9
catSpace, // 10 space
catLetter, // 11 a-zA-Z
catOther, // 12 none of the above
catActive, // 13 ~
catComment, // 14 %
catInvalid // 15 <delete>
};
CatCode theCatcode[256];
inline CatCode catcode(unsigned char c)
{
return theCatcode[c];
}
enum {
FLAG_BRACE_LAST = 1 << 1, // last closing brace ends the parsing
FLAG_RIGHT = 1 << 2, // next \\right ends the parsing process
FLAG_END = 1 << 3, // next \\end ends the parsing process
FLAG_BRACK_LAST = 1 << 4, // next closing bracket ends the parsing
FLAG_TEXTMODE = 1 << 5, // we are in a box
FLAG_ITEM = 1 << 6, // read a (possibly braced token)
FLAG_LEAVE = 1 << 7, // leave the loop at the end
FLAG_SIMPLE = 1 << 8, // next $ leaves the loop
FLAG_EQUATION = 1 << 9, // next \] leaves the loop
FLAG_SIMPLE2 = 1 << 10, // next \) leaves the loop
FLAG_OPTION = 1 << 11, // read [...] style option
FLAG_BRACED = 1 << 12 // read {...} style argument
};
void catInit()
{
fill(theCatcode, theCatcode + 256, catOther);
fill(theCatcode + 'a', theCatcode + 'z' + 1, catLetter);
fill(theCatcode + 'A', theCatcode + 'Z' + 1, catLetter);
theCatcode['\\'] = catEscape;
theCatcode['{'] = catBegin;
theCatcode['}'] = catEnd;
theCatcode['$'] = cat;
theCatcode['&'] = catAlign;
theCatcode['\n'] = catNewline;
theCatcode['#'] = catParameter;
theCatcode['^'] = catSuper;
theCatcode['_'] = catSub;
theCatcode[''] = catIgnore;
theCatcode[' '] = catSpace;
theCatcode['\t'] = catSpace;
theCatcode['\r'] = catNewline;
theCatcode['~'] = catActive;
theCatcode['%'] = catComment;
}
//
// Helper class for parsing
//
class Token {
public:
///
Token() : cs_(), char_(0), cat_(catIgnore) {}
///
Token(char c, CatCode cat) : cs_(), char_(c), cat_(cat) {}
///
Token(string const & cs) : cs_(cs), char_(0), cat_(catIgnore) {}
///
string const & cs() const { return cs_; }
///
CatCode cat() const { return cat_; }
///
char character() const { return char_; }
///
string asString() const { return cs_.size() ? cs_ : string(1, char_); }
private:
///
string cs_;
///
char char_;
///
CatCode cat_;
};
ostream & operator<<(ostream & os, Token const & t)
{
if (t.cs().size())
os << '\\' << t.cs();
else
os << '[' << t.character() << ',' << t.cat() << ']';
return os;
}
class Parser {
public:
///
Parser(istream & is);
///
string parse();
///
string parse(unsigned flags, mode_type mode);
///
int lineno() const { return lineno_; }
///
void putback();
/// dump contents to screen
void dump() const;
private:
///
string getArg(char left, char right);
///
char getChar();
///
void error(string const & msg);
///
void tokenize(istream & is);
///
void tokenize(string const & s);
///
void skipSpaceTokens(istream & is, char c);
///
void push_back(Token const & t);
///
void pop_back();
///
Token const & prevToken() const;
///
Token const & nextToken() const;
///
Token const & getToken();
/// skips spaces if any
void skipSpaces();
///
void lex(string const & s);
///
bool good() const;
///
string parse_verbatim_item();
///
string parse_verbatim_option();
///
int lineno_;
///
vector<Token> tokens_;
///
unsigned pos_;
};
Parser::Parser(istream & is)
: lineno_(0), pos_(0)
{
tokenize(is);
}
void Parser::push_back(Token const & t)
{
tokens_.push_back(t);
}
void Parser::pop_back()
{
tokens_.pop_back();
}
Token const & Parser::prevToken() const
{
static const Token dummy;
return pos_ > 0 ? tokens_[pos_ - 1] : dummy;
}
Token const & Parser::nextToken() const
{
static const Token dummy;
return good() ? tokens_[pos_] : dummy;
}
Token const & Parser::getToken()
{
static const Token dummy;
//cerr << "looking at token " << tokens_[pos_] << " pos: " << pos_ << '\n';
return good() ? tokens_[pos_++] : dummy;
}
void Parser::skipSpaces()
{
while (nextToken().cat() == catSpace || nextToken().cat() == catNewline)
getToken();
}
void Parser::putback()
{
--pos_;
}
bool Parser::good() const
{
return pos_ < tokens_.size();
}
char Parser::getChar()
{
if (!good())
error("The input stream is not well...");
return tokens_[pos_++].character();
}
string Parser::getArg(char left, char right)
{
skipSpaces();
string result;
char c = getChar();
if (c != left)
putback();
else
while ((c = getChar()) != right && good())
result += c;
return result;
}
void Parser::skipSpaceTokens(istream & is, char c)
{
// skip trailing spaces
while (catcode(c) == catSpace || catcode(c) == catNewline)
if (!is.get(c))
break;
//cerr << "putting back: " << c << "\n";
is.putback(c);
}
void Parser::tokenize(istream & is)
{
// eat everything up to the next \end_inset or end of stream
// and store it in s for further tokenization
string s;
char c;
while (is.get(c)) {
s += c;
if (s.size() >= 10 && s.substr(s.size() - 10) == "\\end_inset") {
s = s.substr(0, s.size() - 10);
break;
}
}
// Remove the space after \end_inset
if (is.get(c) && c != ' ')
is.unget();
// tokenize buffer
tokenize(s);
}
void Parser::tokenize(string const & buffer)
{
static bool init_done = false;
if (!init_done) {
catInit();
init_done = true;
}
istringstream is(buffer.c_str(), ios::in | ios::binary);
char c;
while (is.get(c)) {
//cerr << "reading c: " << c << "\n";
switch (catcode(c)) {
case catNewline: {
++lineno_;
is.get(c);
if (catcode(c) == catNewline)
push_back(Token("par"));
else {
push_back(Token('\n', catNewline));
is.putback(c);
}
break;
}
/*
case catComment: {
while (is.get(c) && catcode(c) != catNewline)
;
++lineno_;
break;
}
*/
case catEscape: {
is.get(c);
if (!is) {
error("unexpected end of input");
} else {
string s(1, c);
if (catcode(c) == catLetter) {
// collect letters
while (is.get(c) && catcode(c) == catLetter)
s += c;
skipSpaceTokens(is, c);
}
push_back(Token(s));
}
break;
}
case catSuper:
case catSub: {
push_back(Token(c, catcode(c)));
is.get(c);
skipSpaceTokens(is, c);
break;
}
case catIgnore: {
cerr << "ignoring a char: " << int(c) << "\n";
break;
}
default:
push_back(Token(c, catcode(c)));
}
}
#ifdef FILEDEBUG
dump();
#endif
}
void Parser::dump() const
{
cerr << "\nTokens: ";
for (unsigned i = 0; i < tokens_.size(); ++i) {
if (i == pos_)
cerr << " <#> ";
cerr << tokens_[i];
}
cerr << " pos: " << pos_ << "\n";
}
void Parser::error(string const & msg)
{
cerr << "Line ~" << lineno_ << ": parse error: " << msg << endl;
dump();
//exit(1);
}
string Parser::parse()
{
skipSpaces();
return parse(0, UNDECIDED_MODE);
}
string Parser::parse_verbatim_option()
{
string res;
if (nextToken().character() == '[') {
Token t = getToken();
for (Token t = getToken(); t.character() != ']' && good(); t = getToken()) {
if (t.cat() == catBegin) {
putback();
res += '{' + parse_verbatim_item() + '}';
} else
res += t.asString();
}
}
return res;
}
string Parser::parse_verbatim_item()
{
string res;
if (nextToken().cat() == catBegin) {
Token t = getToken();
for (Token t = getToken(); t.cat() != catEnd && good(); t = getToken()) {
if (t.cat() == catBegin) {
putback();
res += '{' + parse_verbatim_item() + '}';
}
else
res += t.asString();
}
}
return res;
}
string Parser::parse(unsigned flags, mode_type mode)
{
//int limits = 0;
ostringstream result;
while (good()) {
Token const & t = getToken();
#ifdef FILEDEBUG
cerr << "t: " << t << " flags: " << flags << "\n";
cell->dump();
cerr << "\n";
#endif
if (flags & FLAG_ITEM) {
if (t.cat() == catSpace)
continue;
flags &= ~FLAG_ITEM;
if (t.cat() == catBegin) {
// skip the brace and collect everything to the next matching
// closing brace
flags |= FLAG_BRACE_LAST;
continue;
}
// handle only this single token, leave the loop if done
flags |= FLAG_LEAVE;
}
if (flags & FLAG_BRACED) {
if (t.cat() == catSpace)
continue;
if (t.cat() != catBegin) {
error("opening brace expected");
return result.str();
}
// skip the brace and collect everything to the next matching
// closing brace
flags = FLAG_BRACE_LAST;
}
if (flags & FLAG_OPTION) {
if (t.cat() == catOther && t.character() == '[') {
result << parse(FLAG_BRACK_LAST, mode);
} else {
// no option found, put back token and we are done
putback();
}
return result.str();
}
//
// cat codes
//
if (t.cat() == cat) {
if (mode != MATH_MODE) {
// we are inside some text mode thingy, so opening new math is allowed
Token const & n = getToken();
if (n.cat() == cat) {
// TeX's $$...$$ syntax for displayed math
result << wrap("equation", parse(FLAG_SIMPLE, MATH_MODE));
getToken(); // skip the second '$' token
} else {
// simple $...$ stuff
putback();
result << wrap("simple", parse(FLAG_SIMPLE, MATH_MODE));
}
}
else if (flags & FLAG_SIMPLE) {
// this is the end of the formula
return result.str();
}
else {
error("something strange in the parser\n");
break;
}
}
else if (t.cat() == catLetter)
result << t.character();
else if (t.cat() == catSpace && mode != MATH_MODE) {
//if (result.empty() || result[result.size() - 1] != ' ')
result << t.character();
}
else if (t.cat() == catNewline && mode != MATH_MODE)
result << t.character();
else if (t.cat() == catParameter) {
Token const & n = getToken();
result << wrap("macroarg", string(1, n.character()));
}
else if (t.cat() == catActive)
result << wrap("active", string(1, t.character()));
else if (t.cat() == catBegin)
result << wrap("braced", parse(FLAG_BRACE_LAST, mode));
else if (t.cat() == catEnd) {
if (flags & FLAG_BRACE_LAST)
return result.str();
error("found '}' unexpectedly");
//lyx::Assert(0);
//add(cell, '}', LM_TC_TEX);
}
/*
else if (t.cat() == catAlign) {
++cellcol;
//cerr << " column now " << cellcol << " max: " << grid.ncols() << "\n";
if (cellcol == grid.ncols()) {
//cerr << "adding column " << cellcol << "\n";
grid.addCol(cellcol - 1);
}
cell = &grid.cell(grid.index(cellrow, cellcol));
}
*/
else if (t.character() == ']' && (flags & FLAG_BRACK_LAST)) {
//cerr << "finished reading option\n";
return result.str();
}
else if (t.cat() == catOther)
result << string(1, t.character());
else if (t.cat() == catComment) {
string s;
while (good()) {
Token const & t = getToken();
if (t.cat() == catNewline)
break;
s += t.asString();
}
//result << wrap("comment", s);
skipSpaces();
}
//
// control sequences
//
else if (t.cs() == "lyxlock") {
// ignored;
}
else if (t.cs() == "newcommand" || t.cs() == "providecommand") {
string const name = parse_verbatim_item();
string const opts = getArg('[', ']');
string const body = parse_verbatim_item();
// only non-lyxspecific stuff
if (name != "noun" && name != "tabularnewline") {
h_preamble += "\\" + t.cs() + "{" + name + "}";
if (opts.size())
h_preamble += "[" + opts + "]";
h_preamble += "{" + body + "}\n";
}
}
else if (t.cs() == "(")
result << wrap("simple", parse(FLAG_SIMPLE2, MATH_MODE));
else if (t.cs() == "[")
result << wrap("equation", parse(FLAG_EQUATION, MATH_MODE));
else if (t.cs() == "protect")
// ignore \\protect, will hopefully be re-added during output
;
else if (t.cs() == "end") {
if (flags & FLAG_END) {
// eat environment name
string const name = getArg('{', '}');
if (name != active_environments.top())
error("\\end{" + name + "} does not match \\begin{"
+ active_environments.top() + "}");
active_environments.pop();
return result.str();
}
error("found 'end' unexpectedly");
}
else if (t.cs() == ")") {
if (flags & FLAG_SIMPLE2)
return result.str();
error("found '\\)' unexpectedly");
}
else if (t.cs() == "]") {
if (flags & FLAG_EQUATION)
return result.str();
error("found '\\]' unexpectedly");
}
/*
else if (t.cs() == "\\") {
grid.vcrskip(LyXLength(getArg('[', ']')), cellrow);
++cellrow;
cellcol = 0;
if (cellrow == grid.nrows())
grid.addRow(cellrow - 1);
if (grid.asHullstring())
grid.asHullstring()->numbered(cellrow, numbered);
cell = &grid.cell(grid.index(cellrow, cellcol));
}
*/
else if (t.cs() == "documentclass") {
vector<string> opts;
split(getArg('[', ']'), opts, ',');
handle_opt(opts, known_languages, h_language);
handle_opt(opts, known_fontsizes, h_paperfontsize);
h_options = join(opts, ',');
h_textclass = getArg('{', '}');
}
else if (t.cs() == "usepackage") {
string const options = getArg('[', ']');
string const name = getArg('{', '}');
if (name == "a4wide") {
h_papersize = "a4";
h_paperpackage = "widemarginsa4";
} else if (name == "ae")
h_fontscheme = "ae";
else if (name == "aecompl")
h_fontscheme = "ae";
else if (name == "amsmath")
h_use_amsmath = "1";
else if (name == "amssymb")
h_use_amsmath = "1";
else if (name == "babel")
; // ignore this
else if (name == "fontenc")
; // ignore this
else if (name == "inputenc")
h_inputencoding = options;
else if (name == "makeidx")
; // ignore this
else if (name == "verbatim")
; // ignore this
else {
if (options.size())
h_preamble += "\\usepackage[" + options + "]{" + name + "}\n";
else
h_preamble += "\\usepackage{" + name + "}\n";
}
}
else if (t.cs() == "newenvironment") {
string const name = getArg('{', '}');
skipSpaces();
string const begin = parse_verbatim_item();
skipSpaces();
string const end = parse_verbatim_item();
// ignore out mess
if (name != "lyxcode")
result << wrap("newenvironment", begin + end);
}
else if (t.cs() == "def") {
string const name = getToken().cs();
string res;
while (nextToken().cat() != catBegin)
res += getToken().asString();
handle_ert(result, "\\def" + res + '{' + parse_verbatim_item() + '}');
}
else if (t.cs() == "setcounter") {
string const name = getArg('{', '}');
string const content = getArg('{', '}');
if (name == "secnumdepth")
h_secnumdepth = content;
else if (name == "tocdepth")
h_tocdepth = content;
else
h_preamble += "\\setcounter{" + name + "}{" + content + "}\n";
}
else if (t.cs() == "setlength") {
string const name = getToken().cs();
string const content = getArg('{', '}');
if (name == "parskip")
h_paragraph_separation = "skip";
else if (name == "parindent")
h_paragraph_separation = "skip";
else
h_preamble += "\\setcounter{" + name + "}{" + content + "}\n";
}
else if (t.cs() == "par") {
if (!active_environments.empty())
result << "\n\\layout " << active_environments.top() << "\n\n";
}
else if (t.cs() == "title")
result << "\\layout Title\n\n" + parse_verbatim_item();
else if (t.cs() == "author")
result << "\\layout Author\n\n" + parse_verbatim_item();
else if (t.cs() == "abstract")
result << "\\layout Abstract\n\n" + parse_verbatim_item();
else if (t.cs() == "begin") {
string const name = getArg('{', '}');
active_environments.push(name);
result << parse(FLAG_END, mode);
}
if (flags & FLAG_LEAVE) {
flags &= ~FLAG_LEAVE;
break;
}
}
return result.str();
}
} // anonymous namespace
int main(int argc, char * argv[])
{
if (argc <= 1) {
cerr << "Usage: " << argv[0] << " <infile.tex>" << endl;
return 2;
}
string t;
ifstream is(argv[1]);
Parser p(is);
//p.dump();
string s = p.parse();
cout << "# tex2lyx 0.0.2 created this file\n"
<< "\\lyxformat 222\n"
<< "\\textclass " << h_textclass << "\n"
<< "\\begin_preamble\n" << h_preamble << "\\end_preamble\n"
<< "\\options " << h_options << "\n"
<< "\\language " << h_language << "\n"
<< "\\inputencoding " << h_inputencoding << "\n"
<< "\\fontscheme " << h_fontscheme << "\n"
<< "\\graphics " << h_graphics << "\n"
<< "\\paperfontsize " << h_paperfontsize << "\n"
<< "\\spacing " << h_spacing << "\n"
<< "\\papersize " << h_papersize << "\n"
<< "\\paperpackage " << h_paperpackage << "\n"
<< "\\use_geometry " << h_use_geometry << "\n"
<< "\\use_amsmath " << h_use_amsmath << "\n"
<< "\\use_natbib " << h_use_natbib << "\n"
<< "\\use_numerical_citations " << h_use_numerical_citations << "\n"
<< "\\paperorientation " << h_paperorientation << "\n"
<< "\\secnumdepth " << h_secnumdepth << "\n"
<< "\\tocdepth " << h_tocdepth << "\n"
<< "\\paragraph_separation " << h_paragraph_separation << "\n"
<< "\\defskip " << h_defskip << "\n"
<< "\\quotes_language " << h_quotes_language << "\n"
<< "\\quotes_times " << h_quotes_times << "\n"
<< "\\papercolumns " << h_papercolumns << "\n"
<< "\\papersides " << h_papersides << "\n"
<< "\\paperpagestyle " << h_paperpagestyle << "\n"
<< "\\tracking_changes " << h_tracking_changes << "\n"
<< s << "\n"
<< "\\the_end";
return 0;
}