Now tex2lyx is able to set the encoding from what it reads in the preamble.

What works:
- parsing of inputenc should work
- \inputencoding is acted on in the preamble

What does not work:
- \inputencoding in the text
- all the corner cases I have not considered, and all buggy stuff in the
  'what works' paragraph
- InsetLatexAccent are still created, but I do not know when they got added
to the code.

The only notable trick in the code is that I had to disable buffering. Otherwise
the whole text was read before I had a chance to change the encoding...

Finally I remove the artificial limitation that forbid
  \usepackage[opt1,opt2]{package1,package2}



git-svn-id: svn://svn.lyx.org/lyx/lyx-devel/trunk@27592 a592a061-630c-0410-9148-cb99ea01b6c8

src/Encoding.cpp

@@ -513,6 +513,10 @@ docstring Encodings::fromLaTeXCommand(docstring const & cmd, docstring & rem)
 
 void Encodings::initUnicodeMath(Buffer const & buffer)
 {
+#ifdef TEX2LYX
+	// The code below is not needed in tex2lyx and requires additional stuff
+	(void)buffer;
+#else
 	mathcmd.clear();
 	textcmd.clear();
 	mathsym.clear();
@@ -523,11 +527,18 @@ void Encodings::initUnicodeMath(Buffer const & buffer)
 
 	for (; it != end; ++it)
 		it->initUnicodeMath();
+#endif
 }
 
 
 void Encodings::validate(char_type c, LaTeXFeatures & features, bool for_mathed)
 {
+#ifdef TEX2LYX
+	// The code below is not needed in tex2lyx and requires additional stuff
+	(void)c;
+	(void)features;
+	(void)for_mathed;
+#else
 	CharInfoMap::const_iterator const it = unicodesymbols.find(c);
 	if (it != unicodesymbols.end()) {
 		// In mathed, c could be used both in textmode and mathmode
@@ -566,6 +577,7 @@ void Encodings::validate(char_type c, LaTeXFeatures & features, bool for_mathed)
 		features.require("relsize");
 		features.require("lyxmathsym");
 	}
+#endif
 }
 
 

src/tex2lyx/Makefile.am

@@ -41,7 +41,8 @@ LINKED_FILES = \
 	../Lexer.cpp \
 	../lengthcommon.cpp \
 	../Color.cpp \
-	../Color.h
+	../Color.h \
+	../Encoding.cpp
 
 BUILT_SOURCES = $(PCH_FILE)
 

src/tex2lyx/Parser.cpp

@@ -10,6 +10,7 @@
 
 #include <config.h>
 
+#include "Encoding.h"
 #include "Parser.h"
 
 #include <iostream>
@@ -149,6 +150,14 @@ Parser::~Parser()
 }
 
 
+void Parser::setEncoding(std::string const & e)
+{
+	Encoding const * enc = encodings.fromLaTeXName(e);
+	cerr << "setting encoding to " << enc->iconvName();
+	is_ << lyx::setEncoding(enc->iconvName());
+}
+
+
 void Parser::push_back(Token const & t)
 {
 	tokens_.push_back(t);

src/tex2lyx/Parser.h

@@ -119,6 +119,9 @@ public:
 	///
 	~Parser();
 
+	/// change the encoding of the input stream
+	void setEncoding(std::string const & encoding);
+
 	///
 	int lineno() const { return lineno_; }
 	///

src/tex2lyx/preamble.cpp

@@ -248,7 +248,7 @@ string const scale_as_percentage(string const & scale)
 }
 
 
-void handle_package(string const & name, string const & opts,
+void handle_package(Parser &p, string const & name, string const & opts,
 		    bool in_lyx_preamble)
 {
 	vector<string> options = split_options(opts);
@@ -326,9 +326,10 @@ void handle_package(string const & name, string const & opts,
 		; // ignore this
 
 	else if (name == "inputenc") {
-		// only set when there is not more than one inputenc option
-		// therefore check for the "," character
-		// also only set when there is not more then one babel language option
+		// only set when there is not more than one inputenc
+		// option therefore check for the "," character also
+		// only set when there is not more then one babel
+		// language option
 		if (opts.find(",") == string::npos && one_language == true) {
 			if (opts == "ascii")
 				//change ascii to auto to be in the unicode range, see
@@ -337,6 +338,8 @@ void handle_package(string const & name, string const & opts,
 			else if (!opts.empty())
 				h_inputencoding = opts;
 		}
+		if (!options.empty())
+			p.setEncoding(options.back());
 		options.clear();
 	}
 
@@ -663,21 +666,19 @@ void parse_preamble(Parser & p, ostream & os,
 		else if (t.cs() == "usepackage") {
 			string const options = p.getArg('[', ']');
 			string const name = p.getArg('{', '}');
-			if (options.empty() && name.find(',')) {
 			vector<string> vecnames;
 			split(name, vecnames, ',');
 			vector<string>::const_iterator it  = vecnames.begin();
 			vector<string>::const_iterator end = vecnames.end();
 			for (; it != end; ++it)
-					handle_package(trim(*it), string(), 
+				handle_package(p, trim(*it), options, 
 					       in_lyx_preamble);
-			} else {
-				handle_package(name, options, in_lyx_preamble);
-			}
 		}
 
 		else if (t.cs() == "inputencoding") {
-			h_inputencoding = p.getArg('{','}');
+			string const encoding = p.getArg('{','}');
+			h_inputencoding = encoding;
+			p.setEncoding(encoding);
 		}
 
 		else if (t.cs() == "newenvironment") {

src/tex2lyx/tex2lyx.cpp

@@ -15,8 +15,9 @@
 #include "tex2lyx.h"
 
 #include "Context.h"
-#include "TextClass.h"
+#include "Encoding.h"
 #include "Layout.h"
+#include "TextClass.h"
 
 #include "support/convert.h"
 #include "support/debug.h"
@@ -421,7 +422,10 @@ void tex2lyx(idocstream & is, ostream & os)
 /// convert TeX from \p infilename to LyX and write it to \p os
 bool tex2lyx(FileName const & infilename, ostream & os)
 {
-	ifdocstream is(infilename.toFilesystemEncoding().c_str());
+	ifdocstream is;
+	// forbid buffering on this stream
+	is.rdbuf()->pubsetbuf(0,0);
+	is.open(infilename.toFilesystemEncoding().c_str());
 	if (!is.good()) {
 		cerr << "Could not open input file \"" << infilename
 		     << "\" for reading." << endl;
@@ -509,6 +513,7 @@ int main(int argc, char * argv[])
 	} else
 		outfilename = changeExtension(infilename, ".lyx");
 
+	// Read the syntax tables
 	FileName const system_syntaxfile = libFileSearch("", "syntax.default");
 	if (system_syntaxfile.empty()) {
 		cerr << "Error: Could not find syntax file \"syntax.default\"." << endl;
@@ -518,9 +523,24 @@ int main(int argc, char * argv[])
 	if (!syntaxfile.empty())
 		read_syntaxfile(makeAbsPath(syntaxfile));
 
+	// Read the encodings table.
+	FileName const symbols_path = libFileSearch(string(), "unicodesymbols");
+	if (symbols_path.empty()) {
+		cerr << "Error: Could not find file \"unicodesymbols\"." 
+		     << endl;
+		exit(1);
+	}
+	FileName const enc_path = libFileSearch(string(), "encodings");
+	if (enc_path.empty()) {
+		cerr << "Error: Could not find file \"encodings\"." 
+		     << endl;
+		exit(1);
+	}
+	encodings.read(enc_path, symbols_path);
+
+	// The real work now.
 	masterFilePath = onlyPath(infilename);
 	parentFilePath = masterFilePath;
-
 	if (outfilename == "-") {
 		if (tex2lyx(FileName(infilename), cout))
 			return EXIT_SUCCESS;

src/tex2lyx/text.cpp

@@ -1763,6 +1763,7 @@ void parse_text(Parser & p, ostream & os, unsigned flags, bool outer,
 			p.skip_spaces();
 			context.check_layout(os);
 			string const s = p.verbatim_item();
+			//FIXME: this never triggers in UTF8
 			if (s == "\xb1" || s == "\xb3" || s == "\xb2" || s == "\xb5")
 				os << s;
 			else
@@ -2238,6 +2239,8 @@ void parse_text(Parser & p, ostream & os, unsigned flags, bool outer,
 			handle_ert(os, oss.str(), context);
 		}
 
+#if 0
+//FIXME: rewrite this
 		else if (t.cs() == "\"") {
 			context.check_layout(os);
 			string const name = p.verbatim_item();
@@ -2249,6 +2252,7 @@ void parse_text(Parser & p, ostream & os, unsigned flags, bool outer,
 			else if (name == "U") os << '\xdc';
 			else handle_ert(os, "\"{" + name + "}", context);
 		}
+#endif
 
 		// Problem: \= creates a tabstop inside the tabbing environment
 		// and else an accent. In the latter case we really would want
@@ -2273,11 +2277,14 @@ void parse_text(Parser & p, ostream & os, unsigned flags, bool outer,
 			   << "}\n";
 		}
 
+#if 0
+//FIXME: rewrite this
 		else if (t.cs() == "ss") {
 			context.check_layout(os);
 			os << "\xdf";
 			skip_braces(p); // eat {}
 		}
+#endif
 
 		else if (t.cs() == "i" || t.cs() == "j" || t.cs() == "l" ||
 			 t.cs() == "L") {