* This file is part of LyX, the document processor.
* Licence details can be found in the file COPYING.
*
- * \author André Pönitz
+ * \author André Pönitz
*
* Full author contact details are available in file CREDITS.
*/
#include <config.h>
+#include "Encoding.h"
#include "Parser.h"
+#include "support/textutils.h"
#include <iostream>
-#include <sstream>
using namespace std;
void catInit()
{
+ static bool init_done = false;
+ if (init_done)
+ return;
+ init_done = true;
+
fill(theCatcode, theCatcode + 256, catOther);
fill(theCatcode + 'a', theCatcode + 'z' + 1, catLetter);
fill(theCatcode + 'A', theCatcode + 'Z' + 1, catLetter);
theCatcode[int('@')] = catLetter;
}
-
/*!
* Translate a line ending to '\n'.
* \p c must have catcode catNewline, and it must be the last character read
* from \p is.
*/
-char getNewline(istream & is, char c)
+char_type getNewline(idocstream & is, char_type c)
{
// we have to handle 3 different line endings:
// - UNIX (\n)
// - DOS (\r\n)
if (c == '\r') {
// MAC or DOS
- if (is.get(c) && c != '\n') {
+ char_type wc;
+ if (is.get(wc) && wc != '\n') {
// MAC
- is.putback(c);
+ is.putback(wc);
}
return '\n';
}
return c;
}
-}
-
-
-//
-// catcodes
-//
-
-CatCode catcode(unsigned char c)
+CatCode catcode(char_type c)
{
- return theCatcode[c];
+ if (c < 256)
+ return theCatcode[(unsigned char)c];
+ return catOther;
}
+}
//
else if (t.cat() == catEscape)
os << '\\' << t.cs() << ' ';
else if (t.cat() == catLetter)
- os << t.character();
+ os << t.cs();
else if (t.cat() == catNewline)
os << "[" << t.cs().size() << "\\n," << t.cat() << "]\n";
else
- os << '[' << t.character() << ',' << t.cat() << ']';
+ os << '[' << t.cs() << ',' << t.cat() << ']';
return os;
}
-string Token::asString() const
+string Token::asInput() const
+{
+ if (cat_ == catComment)
+ return '%' + cs_ + '\n';
+ if (cat_ == catEscape)
+ return '\\' + cs_;
+ return cs_;
+}
+
+
+bool Token::isAlnumASCII() const
{
- return cs_.size() ? cs_ : string(1, char_);
+ return cat_ == catLetter ||
+ (cat_ == catOther && cs_.length() == 1 && isDigitASCII(cs_[0]));
}
-string Token::asInput() const
+#ifdef FILEDEBUG
+void debugToken(std::ostream & os, Token const & t, unsigned int flags)
{
- if (cat_ == catComment)
- return '%' + cs_ + '\n';
- if (cat_ == catSpace || cat_ == catNewline)
- return cs_;
- return char_ ? string(1, char_) : '\\' + cs_;
+ char sep = ' ';
+ os << "t: " << t << " flags: " << flags;
+ if (flags & FLAG_BRACE_LAST) { os << sep << "BRACE_LAST"; sep = '|'; }
+ if (flags & FLAG_RIGHT ) { os << sep << "RIGHT" ; sep = '|'; }
+ if (flags & FLAG_END ) { os << sep << "END" ; sep = '|'; }
+ if (flags & FLAG_BRACK_LAST) { os << sep << "BRACK_LAST"; sep = '|'; }
+ if (flags & FLAG_TEXTMODE ) { os << sep << "TEXTMODE" ; sep = '|'; }
+ if (flags & FLAG_ITEM ) { os << sep << "ITEM" ; sep = '|'; }
+ if (flags & FLAG_LEAVE ) { os << sep << "LEAVE" ; sep = '|'; }
+ if (flags & FLAG_SIMPLE ) { os << sep << "SIMPLE" ; sep = '|'; }
+ if (flags & FLAG_EQUATION ) { os << sep << "EQUATION" ; sep = '|'; }
+ if (flags & FLAG_SIMPLE2 ) { os << sep << "SIMPLE2" ; sep = '|'; }
+ if (flags & FLAG_OPTION ) { os << sep << "OPTION" ; sep = '|'; }
+ if (flags & FLAG_BRACED ) { os << sep << "BRACED" ; sep = '|'; }
+ if (flags & FLAG_CELL ) { os << sep << "CELL" ; sep = '|'; }
+ if (flags & FLAG_TABBING ) { os << sep << "TABBING" ; sep = '|'; }
+ os << "\n";
}
+#endif
//
//
-Parser::Parser(istream & is)
- : lineno_(0), pos_(0)
+Parser::Parser(idocstream & is)
+ : lineno_(0), pos_(0), iss_(0), is_(is), encoding_latex_("utf8")
{
- tokenize(is);
}
Parser::Parser(string const & s)
- : lineno_(0), pos_(0)
+ : lineno_(0), pos_(0),
+ iss_(new idocstringstream(from_utf8(s))), is_(*iss_),
+ encoding_latex_("utf8")
{
- istringstream is(s);
- tokenize(is);
}
-void Parser::push_back(Token const & t)
+Parser::~Parser()
{
- tokens_.push_back(t);
+ delete iss_;
+}
+
+
+void Parser::setEncoding(std::string const & e)
+{
+ Encoding const * enc = encodings.fromLaTeXName(e);
+ if (!enc) {
+ cerr << "Unknown encoding " << e << ". Ignoring." << std::endl;
+ return;
+ }
+ //cerr << "setting encoding to " << enc->iconvName() << std::endl;
+ is_ << lyx::setEncoding(enc->iconvName());
+ encoding_latex_ = e;
}
-void Parser::pop_back()
+void Parser::push_back(Token const & t)
{
- tokens_.pop_back();
+ tokens_.push_back(t);
}
-Token const & Parser::prev_token() const
+// We return a copy here because the tokens_ vector may get reallocated
+Token const Parser::prev_token() const
{
static const Token dummy;
return pos_ > 1 ? tokens_[pos_ - 2] : dummy;
}
-Token const & Parser::curr_token() const
+// We return a copy here because the tokens_ vector may get reallocated
+Token const Parser::curr_token() const
{
static const Token dummy;
return pos_ > 0 ? tokens_[pos_ - 1] : dummy;
}
-Token const & Parser::next_token() const
+// We return a copy here because the tokens_ vector may get reallocated
+Token const Parser::next_token()
{
static const Token dummy;
return good() ? tokens_[pos_] : dummy;
}
-Token const & Parser::get_token()
+// We return a copy here because the tokens_ vector may get reallocated
+Token const Parser::next_next_token()
+{
+ static const Token dummy;
+ // If good() has not been called after the last get_token() we need
+ // to tokenize two more tokens.
+ if (pos_ + 1 >= tokens_.size()) {
+ tokenize_one();
+ tokenize_one();
+ }
+ return pos_ + 1 < tokens_.size() ? tokens_[pos_ + 1] : dummy;
+}
+
+
+// We return a copy here because the tokens_ vector may get reallocated
+Token const Parser::get_token()
{
static const Token dummy;
//cerr << "looking at token " << tokens_[pos_] << " pos: " << pos_ << '\n';
}
-bool Parser::isParagraph() const
+bool Parser::isParagraph()
{
// A new paragraph in TeX ist started
// - either by a newline, following any amount of whitespace
if (curr_token().cat() == catNewline &&
(curr_token().cs().size() > 1 ||
(next_token().cat() == catSpace &&
- pos_ < tokens_.size() - 1 &&
- tokens_[pos_ + 1].cat() == catNewline)))
+ next_next_token().cat() == catNewline)))
return true;
if (curr_token().cat() == catEscape && curr_token().cs() == "par")
return true;
}
-void Parser::skip_spaces(bool skip_comments)
+bool Parser::skip_spaces(bool skip_comments)
{
// We just silently return if we have no more tokens.
// skip_spaces() should be callable at any time,
// the caller must check p::good() anyway.
+ bool skipped = false;
while (good()) {
get_token();
if (isParagraph()) {
putback();
break;
}
- if ( curr_token().cat() == catSpace ||
- curr_token().cat() == catNewline ||
- (curr_token().cat() == catComment && curr_token().cs().empty()))
+ if (curr_token().cat() == catSpace ||
+ curr_token().cat() == catNewline) {
+ skipped = true;
+ continue;
+ }
+ if ((curr_token().cat() == catComment && curr_token().cs().empty()))
continue;
- if (skip_comments && curr_token().cat() == catComment)
- cerr << " Ignoring comment: " << curr_token().asInput();
- else {
+ if (skip_comments && curr_token().cat() == catComment) {
+ // If positions_ is not empty we are doing some kind
+ // of look ahead
+ if (!positions_.empty())
+ cerr << " Ignoring comment: "
+ << curr_token().asInput();
+ } else {
putback();
break;
}
}
+ return skipped;
}
putback();
else if (skip_comments && curr_token().cat() == catComment) {
// TODO: Get rid of this
- cerr << "Unignoring comment: " << curr_token().asInput();
+ // If positions_ is not empty we are doing some kind
+ // of look ahead
+ if (!positions_.empty())
+ cerr << "Unignoring comment: "
+ << curr_token().asInput();
putback();
}
else
}
-bool Parser::good() const
+void Parser::pushPosition()
+{
+ positions_.push_back(pos_);
+}
+
+
+void Parser::popPosition()
{
+ pos_ = positions_.back();
+ positions_.pop_back();
+}
+
+
+bool Parser::good()
+{
+ if (pos_ < tokens_.size())
+ return true;
+ tokenize_one();
return pos_ < tokens_.size();
}
{
if (!good())
error("The input stream is not well...");
- return tokens_[pos_++].character();
+ return get_token().character();
+}
+
+
+bool Parser::hasOpt()
+{
+ // An optional argument can occur in any of the following forms:
+ // - \foo[bar]
+ // - \foo [bar]
+ // - \foo
+ // [bar]
+ // - \foo %comment
+ // [bar]
+
+ // remember current position
+ unsigned int oldpos = pos_;
+ // skip spaces and comments
+ while (good()) {
+ get_token();
+ if (isParagraph()) {
+ putback();
+ break;
+ }
+ if (curr_token().cat() == catSpace ||
+ curr_token().cat() == catNewline ||
+ curr_token().cat() == catComment)
+ continue;
+ putback();
+ break;
+ }
+ bool const retval = (next_token().asInput() == "[");
+ pos_ = oldpos;
+ return retval;
}
}
-string Parser::getFullOpt()
+string Parser::getFullOpt(bool keepws)
{
Arg arg = getFullArg('[', ']');
if (arg.first)
return '[' + arg.second + ']';
- return arg.second;
+ if (keepws)
+ unskip_spaces(true);
+ return string();
}
-string Parser::getOpt()
+string Parser::getOpt(bool keepws)
{
string const res = getArg('[', ']');
- return res.empty() ? string() : '[' + res + ']';
+ if (res.empty()) {
+ if (keepws)
+ unskip_spaces(true);
+ return string();
+ }
+ return '[' + res + ']';
+}
+
+
+string Parser::getFullParentheseArg()
+{
+ Arg arg = getFullArg('(', ')');
+ if (arg.first)
+ return '(' + arg.second + ')';
+ return string();
}
}
-void Parser::tokenize(istream & is)
+string const Parser::plainEnvironment(string const & name)
{
- static bool init_done = false;
+ if (!good())
+ return string();
- if (!init_done) {
- catInit();
- init_done = true;
+ ostringstream os;
+ for (Token t = get_token(); good(); t = get_token()) {
+ if (t.asInput() == "\\end") {
+ string const end = getArg('{', '}');
+ if (end == name)
+ return os.str();
+ else
+ os << "\\end{" << end << '}';
+ } else
+ os << t.asInput();
}
+ cerr << "unexpected end of input" << endl;
+ return os.str();
+}
- char c;
- while (is.get(c)) {
- //cerr << "reading c: " << c << "\n";
-
- switch (catcode(c)) {
- case catSpace: {
- string s(1, c);
- while (is.get(c) && catcode(c) == catSpace)
- s += c;
- if (catcode(c) != catSpace)
- is.putback(c);
- push_back(Token(s, catSpace));
- break;
- }
- case catNewline: {
- ++lineno_;
- string s(1, getNewline(is, c));
- while (is.get(c) && catcode(c) == catNewline) {
- ++lineno_;
- s += getNewline(is, c);
- }
- if (catcode(c) != catNewline)
- is.putback(c);
- push_back(Token(s, catNewline));
- break;
- }
+string const Parser::plainCommand(char left, char right, string const & name)
+{
+ if (!good())
+ return string();
+ // check if first token is really the start character
+ Token tok = get_token();
+ if (tok.character() != left) {
+ cerr << "first character does not match start character of command \\" << name << endl;
+ return string();
+ }
+ ostringstream os;
+ for (Token t = get_token(); good(); t = get_token()) {
+ if (t.character() == right) {
+ return os.str();
+ } else
+ os << t.asInput();
+ }
+ cerr << "unexpected end of input" << endl;
+ return os.str();
+}
- case catComment: {
- // We don't treat "%\n" combinations here specially because
- // we want to preserve them in the preamble
- string s;
- while (is.get(c) && catcode(c) != catNewline)
- s += c;
- // handle possible DOS line ending
- if (catcode(c) == catNewline)
- c = getNewline(is, c);
- // Note: The '%' at the beginning and the '\n' at the end
- // of the comment are not stored.
- ++lineno_;
- push_back(Token(s, catComment));
- 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;
- if (catcode(c) != catLetter)
- is.putback(c);
- }
- push_back(Token(s, catEscape));
- }
- break;
- }
+void Parser::tokenize_one()
+{
+ catInit();
+ char_type c;
+ if (!is_.get(c))
+ return;
- case catIgnore: {
- cerr << "ignoring a char: " << int(c) << "\n";
- break;
+ switch (catcode(c)) {
+ case catSpace: {
+ docstring s(1, c);
+ while (is_.get(c) && catcode(c) == catSpace)
+ s += c;
+ if (catcode(c) != catSpace)
+ is_.putback(c);
+ push_back(Token(s, catSpace));
+ break;
+ }
+
+ case catNewline: {
+ ++lineno_;
+ docstring s(1, getNewline(is_, c));
+ while (is_.get(c) && catcode(c) == catNewline) {
+ ++lineno_;
+ s += getNewline(is_, c);
+ }
+ if (catcode(c) != catNewline)
+ is_.putback(c);
+ push_back(Token(s, catNewline));
+ break;
+ }
+
+ case catComment: {
+ // We don't treat "%\n" combinations here specially because
+ // we want to preserve them in the preamble
+ docstring s;
+ while (is_.get(c) && catcode(c) != catNewline)
+ s += c;
+ // handle possible DOS line ending
+ if (catcode(c) == catNewline)
+ c = getNewline(is_, c);
+ // Note: The '%' at the beginning and the '\n' at the end
+ // of the comment are not stored.
+ ++lineno_;
+ push_back(Token(s, catComment));
+ break;
+ }
+
+ case catEscape: {
+ is_.get(c);
+ if (!is_) {
+ error("unexpected end of input");
+ } else {
+ docstring s(1, c);
+ if (catcode(c) == catLetter) {
+ // collect letters
+ while (is_.get(c) && catcode(c) == catLetter)
+ s += c;
+ if (catcode(c) != catLetter)
+ is_.putback(c);
}
-
- default:
- push_back(Token(c, catcode(c)));
+ push_back(Token(s, catEscape));
}
+ break;
+ }
+
+ case catIgnore: {
+ cerr << "ignoring a char: " << c << "\n";
+ break;
+ }
+
+ default:
+ push_back(Token(docstring(1, c), catcode(c)));
}
+ //cerr << tokens_.back();
}
string res;
if (next_token().character() == '[') {
Token t = get_token();
- for (Token t = get_token(); t.character() != ']' && good(); t = get_token()) {
+ for (t = get_token(); t.character() != ']' && good(); t = get_token()) {
if (t.cat() == catBegin) {
putback();
res += '{' + verbatim_item() + '}';
} else
- res += t.asString();
+ res += t.cs();
}
}
return res;
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