Georg's patch for bug 3043:

Introduces new encodings for the CJK-languages.
The CJK-languages can now be selected from LyX's menu.
For remaining small problems, see the thread "Help needed for bug 3043" on the devel-list.

git-svn-id: svn://svn.lyx.org/lyx/lyx-devel/trunk@18216 a592a061-630c-0410-9148-cb99ea01b6c8

development/FORMAT

@@ -1,6 +1,18 @@
 LyX file-format changes
 -----------------------
 
+2007-05-06 Uwe Stöhr  <uwestoehr@web.de>
+
+	* format incremented to 268: add support for the CJK encodings
+	- all encodings supported by CJK.sty are now in lib/encodings
+	- lib/encoding has got two new flags:
+	  - encoding package:
+	    "inputenc" for those languages that use the inputenc-package and
+	    "CJK" for the CJK encodings
+	  - "fixed"/"variable" to divide between multi- or single-byte encoding 
+	- lib/languages allows now to set an empty language for babel
+	  in this case babel isn't called.
+	
 2007-05-04  Jürgen Spitzmüller  <j.spitzmueller@gmx.de>
 
 	* format incremented to 267: add plain utf8 encoding (for XeTeX).

lib/encodings

@@ -1,134 +1,189 @@
 # FIXME: Have a look at the encodings known by the inputenc package and add
 # missing ones. Caution: File format change!
 
-# Note that you can only add single byte encodings to this file without
+# Note that you can only add singlebyte encodings to this file.
-# changing some C++ code.
+# LyX does not support the output of multibyte encodings (e.g. utf16).
-# The only multibyte encoding that is currently supported is utf8, and this
+# It does support singlebyte encodings with variable with (e.g. utf8).
-# support is hardcoded to the iconv name "UTF-8".
+# These are marked with the "variable" keyword.
+# Fixed width encodings are marked with the "fixed" keyword.
 
-# Order of names: LyX name LaTeX name iconv name
+# Syntax: Encoding <LyX name> <LaTeX name> <iconv name> fixed|variable <package> End
 
-Encoding utf8 utf8 UTF-8
+# encodings used by inputenc.sty
+
+Encoding utf8 utf8 UTF-8 variable inputenc
 End
 
 # This one is used by many CJK packages. utf8 is supposed to be the successor,
 # but does not have all features of utf8x yet.
-Encoding utf8x utf8x UTF-8
+Encoding utf8x utf8x UTF-8 variable inputenc
 End
 
 # A plain utf8 encoding that does not use the inputenc package.
 # Such an encoding is required for XeTeX.
-Encoding utf8-plain utf8-plain UTF-8
+Encoding utf8-plain utf8-plain UTF-8 variable none
 End
 
 # This encoding is used to typeset Armenian using the armtex package
-Encoding armscii8 armscii8 ARMSCII-8
+Encoding armscii8 armscii8 ARMSCII-8 fixed inputenc
 End
 
-Encoding iso8859-1 latin1 ISO-8859-1
+Encoding iso8859-1 latin1 ISO-8859-1 fixed inputenc
 End
 
-Encoding iso8859-2 latin2 ISO-8859-2
+Encoding iso8859-2 latin2 ISO-8859-2 fixed inputenc
 End
 
-Encoding iso8859-3 latin3 ISO-8859-3
+Encoding iso8859-3 latin3 ISO-8859-3 fixed inputenc
 End
 
-Encoding iso8859-4 latin4 ISO-8859-4
+Encoding iso8859-4 latin4 ISO-8859-4 fixed inputenc
 End
 
-Encoding iso8859-5 iso88595 ISO-8859-5
+Encoding iso8859-5 iso88595 ISO-8859-5 fixed inputenc
 End
 
 # Not standard, see http://tug.ctan.org/tex-archive/language/arabic/arabi/arabi/texmf/latex/arabi/
-Encoding iso8859-6 8859-6 ISO-8859-6
+Encoding iso8859-6 8859-6 ISO-8859-6 fixed inputenc
 End
 
-Encoding iso8859-7 iso-8859-7 ISO-8859-7
+Encoding iso8859-7 iso-8859-7 ISO-8859-7 fixed inputenc
 End
 
-Encoding iso8859-8 8859-8 ISO-8859-8
+Encoding iso8859-8 8859-8 ISO-8859-8 fixed inputenc
 End
 
-Encoding iso8859-9 latin5 ISO-8859-9
+Encoding iso8859-9 latin5 ISO-8859-9 fixed inputenc
 End
 
 # Not standard, see http://www.vtex.lt/tex/littex/index.html
-Encoding iso8859-13 l7xenc ISO-8859-13
+Encoding iso8859-13 l7xenc ISO-8859-13 fixed inputenc
 End
 
-Encoding iso8859-15 latin9 ISO-8859-15
+Encoding iso8859-15 latin9 ISO-8859-15 fixed inputenc
 End
 
-Encoding iso8859-16 latin10 ISO-8859-16
+Encoding iso8859-16 latin10 ISO-8859-16 fixed inputenc
 End
 
-Encoding cp437 cp437 CP437
+Encoding cp437 cp437 CP437 fixed inputenc
 End
 
 # cp437, but on position 225 is sz instead of beta
-Encoding cp437de cp437de CP437
+Encoding cp437de cp437de CP437 fixed inputenc
 End
 
-Encoding cp850 cp850 CP850
+Encoding cp850 cp850 CP850 fixed inputenc
 End
 
-Encoding cp852 cp852 CP852
+Encoding cp852 cp852 CP852 fixed inputenc
 End
 
-Encoding cp855 cp855 CP855
+Encoding cp855 cp855 CP855 fixed inputenc
 End
 
-Encoding cp858 cp858 CP858
+Encoding cp858 cp858 CP858 fixed inputenc
 End
 
-Encoding cp862 cp862 CP862
+Encoding cp862 cp862 CP862 fixed inputenc
 End
 
-Encoding cp865 cp865 CP865
+Encoding cp865 cp865 CP865 fixed inputenc
 End
 
-Encoding cp866 cp866 CP866
+Encoding cp866 cp866 CP866 fixed inputenc
 End
 
-Encoding cp1250 cp1250 CP1250
+Encoding cp1250 cp1250 CP1250 fixed inputenc
 End
 
-Encoding cp1251 cp1251 CP1251
+Encoding cp1251 cp1251 CP1251 fixed inputenc
 End
 
-Encoding cp1252 cp1252 CP1252
+Encoding cp1252 cp1252 CP1252 fixed inputenc
 End
 
-Encoding cp1255 cp1255 CP1255
+Encoding cp1255 cp1255 CP1255 fixed inputenc
 End
 
 # Not standard, see http://tug.ctan.org/tex-archive/language/arabic/arabi/arabi/texmf/latex/arabi/
-Encoding cp1256 cp1256 CP1256
+Encoding cp1256 cp1256 CP1256 fixed inputenc
 End
 
-Encoding cp1257 cp1257 CP1257
+Encoding cp1257 cp1257 CP1257 fixed inputenc
 End
 
-Encoding koi8 koi8-r KOI8-R
+Encoding koi8 koi8-r KOI8-R fixed inputenc
 End
 
-Encoding koi8-u koi8-u KOI8-U
+Encoding koi8-u koi8-u KOI8-U fixed inputenc
 End
 
+Encoding pt154 pt154 PT154 fixed inputenc
+End
+
+Encoding pt254 pt254 PT254 fixed inputenc
+End
+
+# encodings used by CJK.sty
+
+# The following encodings that are supported by the CJK package are not
+# included here, because they are not widely used and lack proper iconv support:
+# Bg5+, GBt
+# See the NOTES file of libiconv for details.
+
+# The following encodings can't be handled directly, because the code points
+# of TeX control characters like {, } and \ can occur in the second byte:
+
+# For traditional chinese
+#Encoding big5 Bg5 BIG5 variable CJK
+#End
+
+# For japanese
+#Encoding shift-jis SJIS SJIS variable CJK
+#End
+
+# The following encodings need hardcoded support of the encodable unicode
+# range, but are known by iconv:
+
+# For simplified chinese
+Encoding euc-cn GB EUC-CN variable CJK
+End
+
+# For simplified chinese
+Encoding gbk GBK GBK variable CJK
+End
+ 
+# For japanese
+Encoding jis JIS JIS variable CJK
+End
+
+# For korean
+Encoding euc-kr KS EUC-KR variable CJK
+End
+
+# The CJK package has yet another name for utf8...
+Encoding utf8-cjk UTF8 UTF-8 variable CJK
+End
+
+# For traditional chinese
+Encoding euc-tw EUC-TW EUC-TW variable CJK
+End
+
+# For japanese
+Encoding euc-jp EUC-JP EUC-JP variable CJK
+End
+
+
 # This one needs hardcoded support, since the inputenc package does not know
-# tis620-0, and thailatex sets up babel directly to use tis620-0, so the value
+# tis620-0, and thailatex sets up babel directly to use tis620-0, so the
-# for inputenc is never output to .tex files (but needed for the hardcoded
+# LaTeX name is never output to .tex files (but needed for the hardcoded
 # tis620-0 support).
-Encoding tis620-0 tis620-0 TIS620-0
+Encoding tis620-0 tis620-0 TIS620-0 fixed none
 End
 
-Encoding pt154 pt154 PT154
-End
-
-Encoding pt254 pt254 PT254
-End
 
 # Pure 7bit ASCII encoding (partially hardcoded in LyX)
-Encoding ascii ascii ascii
+Encoding ascii ascii ascii fixed none
 End
+

lib/languages

@@ -2,10 +2,7 @@
 afrikaans   afrikaans	"Afrikaans"	false  iso8859-15 af_ZA	 ""
 american    american	"American"	false  iso8859-15 en_US	 ""
 arabic      arabic	"Arabic"	true   cp1256     ar_SA	 ""
-# loading babel with the option "english" as armtex overwrites this later
+armenian    ""		"Armenian"	false  armscii8   hy_AM	 ""
-# armtex provides the armscii8 encoding and translates words instead of babel
-# the english option can later be omitted when the patch for bug 3043 is in.
-armenian    english	"Armenian"	false  armscii8   hy_AM	 ""
 austrian    austrian	"Austrian"	false  iso8859-15 de_AT	 ""
 naustrian   naustrian	"Austrian (new spelling)" false  iso8859-15  de_AT	 ""
 bahasa      bahasa	"Bahasa"	false  iso8859-15 in_ID	 ""
@@ -18,6 +15,8 @@ bulgarian   bulgarian	"Bulgarian"	false  cp1251     bg_BG  ""
 canadian    canadian	"Canadian"	false  iso8859-15 en_CA	 ""
 canadien    canadien	"French Canadian"	false  iso8859-15  fr_CA	 ""
 catalan     catalan 	"Catalan"	false  iso8859-15 ca_ES	 ""
+chinese-simplified ""	"Chinese (simplified)"	false euc-cn zh	 ""
+chinese-traditional ""	"Chinese (traditional)"	false utf8-cjk zh	 ""
 croatian    croatian	"Croatian"	false  iso8859-2  hr_HR	 ""
 czech       czech	"Czech"		false  iso8859-2  cs_CZ	 ""
 danish      danish	"Danish"	false  iso8859-15 da_DK	 ""
@@ -39,7 +38,9 @@ hebrew      hebrew	"Hebrew"	true   cp1255     he_IL	 ""
 #hungarian   hungarian	"Hungarian"	false  iso8859-2  hu_HU	 ""
 irish       irish	"Irish"		false  iso8859-15 ga_IE	 ""
 italian     italian	"Italian"	false  iso8859-15 it_IT	 ""
+japanese    ""		"Japanese"	false  euc-jp     ja	 ""
 kazakh	    kazakh	"Kazakh"	false  pt154      kk_KZ	 ""
+korean      ""		"Korean"	false  euc-kr     ko	 ""
 #lsorbian    lsorbian	"Lower Sorbian"	false  iso8859-2  dsb_DE	 ""
 lithuanian  lithuanian	"Lithuanian"	false  iso8859-13 lt_LT	 ""
 latvian     latvian	"Latvian"	false  iso8859-13 lv_LV	 ""

lib/lyx2lyx/LyX.py

@@ -74,7 +74,7 @@ format_relation = [("0_06",    [200], generate_minor_versions("0.6" , 4)),
                    ("1_2",     [220], generate_minor_versions("1.2" , 4)),
                    ("1_3",     [221], generate_minor_versions("1.3" , 7)),
                    ("1_4", range(222,246), generate_minor_versions("1.4" , 4)),
-                   ("1_5", range(246,268), generate_minor_versions("1.5" , 0))]
+                   ("1_5", range(246,269), generate_minor_versions("1.5" , 0))]
 
 
 def formats_list():

lib/lyx2lyx/lyx_1_5.py

@@ -1325,6 +1325,28 @@ def revert_armenian(document):
         document.preamble.append('\\usepackage{armtex}')
 
 
+def revert_CJK(document):
+    " Set CJK encodings to default and languages chinese, japanese and korean to english. "
+    encodings = ["Bg5", "Bg5+", "GB", "GBt", "GBK", "JIS",
+                 "KS", "SJIS", "UTF8", "EUC-TW", "EUC-JP"]
+    i = find_token(document.header, "\\inputencoding", 0)
+    if i == -1:
+        document.header.append("\\inputencoding auto")
+    else:
+        inputenc = get_value(document.header, "\\inputencoding", i)
+        if inputenc in encodings:
+            document.header[i] = "\\inputencoding default"
+    document.inputencoding = get_value(document.header, "\\inputencoding", 0)
+
+    if document.language == "chinese-simplified" or \
+       document.language == "chinese-traditional" or \
+       document.language == "japanese" or document.language == "korean":
+        document.language = "english"
+        i = find_token(document.header, "\\language", 0)
+        if i != -1:
+            document.header[i] = "\\language english"
+
+
 ##
 # Conversion hub
 #
@@ -1351,9 +1373,11 @@ convert = [[246, []],
            [264, [convert_cv_textclass]],
            [265, [convert_tableborder]],
            [266, []],
-           [267, []]]
+           [267, []],
+           [268, []]]
 
-revert =  [[266, [revert_utf8plain]],
+revert =  [[267, [revert_CJK]],
+           [266, [revert_utf8plain]],
            [265, [revert_armenian]],
            [264, [revert_tableborder]],
            [263, [revert_cv_textclass]],
@@ -1380,3 +1404,4 @@ revert =  [[266, [revert_utf8plain]],
 if __name__ == "__main__":
     pass
 
+

src/Buffer.cpp

@@ -141,7 +141,7 @@ using std::string;
 
 namespace {
 
-int const LYX_FORMAT = 267;
+int const LYX_FORMAT = 268;
 
 } // namespace anon
 
@@ -974,6 +974,16 @@ void Buffer::writeLaTeXSource(odocstream & os,
 		texrow().newline();
 	}
 
+	Encoding const & encoding = params().encoding();
+	if (encoding.package() == Encoding::CJK) {
+		// Open a CJK environment, since in contrast to the encodings
+		// handled by inputenc the document encoding is not set in
+		// the preamble if it is handled by CJK.sty.
+		os << "\\begin{CJK}{" << from_ascii(encoding.latexName())
+		   << "}{}\n";
+		texrow().newline();
+	}
+
 	// if we are doing a real file with body, even if this is the
 	// child of some other buffer, let's cut the link here.
 	// This happens for example if only a child document is printed.
@@ -994,6 +1004,14 @@ void Buffer::writeLaTeXSource(odocstream & os,
 	os << endl;
 	texrow().newline();
 
+	if (encoding.package() == Encoding::CJK) {
+		// Close the open CJK environment.
+		// latexParagraphs will have opened one even if the last text
+		// was not CJK.
+		os << "\\end{CJK}\n";
+		texrow().newline();
+	}
+
 	if (!lyxrc.language_auto_end &&
 	    !params().language->babel().empty()) {
 		os << from_utf8(subst(lyxrc.language_command_end,

src/BufferParams.cpp

@@ -893,16 +893,15 @@ bool BufferParams::writeLaTeX(odocstream & os, LaTeXFeatures & features,
 	if (inputenc == "auto") {
 		string const doc_encoding =
 			language->encoding()->latexName();
+		Encoding::Package const package =
+			language->encoding()->package();
 
 		// Create a list with all the input encodings used
 		// in the document
 		std::set<string> encodings =
 			features.getEncodingSet(doc_encoding);
 
-		// thailatex does not use the inputenc package, but sets up
+		if (!encodings.empty() || package == Encoding::inputenc) {
-		// babel directly for tis620-0 encoding, therefore we must
-		// not request inputenc for tis620-0 encoding
-		if (!encodings.empty() || doc_encoding != "tis620-0") {
 			os << "\\usepackage[";
 			std::set<string>::const_iterator it = encodings.begin();
 			std::set<string>::const_iterator const end = encodings.end();
@@ -912,7 +911,7 @@ bool BufferParams::writeLaTeX(odocstream & os, LaTeXFeatures & features,
 			}
 			for (; it != end; ++it)
 				os << ',' << from_ascii(*it);
-			if (doc_encoding != "tis620-0") {
+			if (package == Encoding::inputenc) {
 				if (!encodings.empty())
 					os << ',';
 				os << from_ascii(doc_encoding);
@@ -920,12 +919,24 @@ bool BufferParams::writeLaTeX(odocstream & os, LaTeXFeatures & features,
 			os << "]{inputenc}\n";
 			texrow.newline();
 		}
-	// utf8-plain is for XeTeX users (inputenc not desired)
+		if (package == Encoding::CJK) {
-	} else if (inputenc != "default" && inputenc != "tis620-0" &&
+			os << "\\usepackage{CJK}\n";
-	           inputenc != "ascii" &&  inputenc != "utf8-plain") {
+			texrow.newline();
-		os << "\\usepackage[" << from_ascii(inputenc)
+		}
-		   << "]{inputenc}\n";
+	} else if (inputenc != "default") {
-		texrow.newline();
+		switch (language->encoding()->package()) {
+		case Encoding::none:
+			break;
+		case Encoding::inputenc:
+			os << "\\usepackage[" << from_ascii(inputenc)
+			   << "]{inputenc}\n";
+			texrow.newline();
+			break;
+		case Encoding::CJK:
+			os << "\\usepackage{CJK}\n";
+			texrow.newline();
+			break;
+		}
 	}
 
 	// The encoding "armscii8" is only available when the package "armtex" is loaded.

src/Encoding.cpp

@@ -123,25 +123,42 @@ struct CharInfo {
 typedef std::map<char_type, CharInfo> CharInfoMap;
 CharInfoMap unicodesymbols;
 
+
+/// The highest code point in UCS4 encoding (1<<20 + 1<<16)
+char_type const max_ucs4 = 0x110000;
+
 } // namespace anon
 
 
-Encoding::Encoding(string const & n, string const & l, string const & i)
+Encoding::Encoding(string const & n, string const & l, string const & i,
-	: Name_(n), LatexName_(l), iconvName_(i)
+                   bool f, Encoding::Package p)
+	: Name_(n), LatexName_(l), iconvName_(i), fixedwidth_(f), package_(p)
 {
-	if (n == "ascii")
+	if (n == "ascii") {
 		// ASCII can encode 128 code points and nothing else
 		start_encodable_ = 128;
-	else if (i == "UTF-8")
+		complete_ = true;
-		// UTF8 can encode all 1<<20 + 1<<16 UCS4 code points
+	} else if (i == "UTF-8") {
-		start_encodable_ = 0x110000;
+		// UTF8 can encode all UCS4 code points
-	else {
+		start_encodable_ = max_ucs4;
-		start_encodable_ = 0;
+		complete_ = true;
-		// temporarily switch off lyxerr, since we will generate iconv errors
+	} else {
-		lyxerr.disable();
+		complete_ = false;
+	}
+}
+
+
+void Encoding::init() const
+{
+	start_encodable_ = 0;
+	// temporarily switch off lyxerr, since we will generate iconv errors
+	lyxerr.disable();
+	if (fixedwidth_) {
+		// We do not need to check all UCS4 code points, it is enough
+		// if we check all 256 code points of this encoding.
 		for (unsigned short j = 0; j < 256; ++j) {
 			char const c = j;
-			std::vector<char_type> const ucs4 = eightbit_to_ucs4(&c, 1, i);
+			std::vector<char_type> const ucs4 = eightbit_to_ucs4(&c, 1, iconvName_);
 			if (ucs4.size() == 1) {
 				char_type const c = ucs4[0];
 				CharInfoMap::const_iterator const it = unicodesymbols.find(c);
@@ -149,19 +166,36 @@ Encoding::Encoding(string const & n, string const & l, string const & i)
 					encodable_.insert(c);
 			}
 		}
-		lyxerr.enable();
+		} else {
-		CharSet::iterator it = encodable_.find(start_encodable_);
+		// We do not know how many code points this encoding has, and
-		while (it != encodable_.end()) {
+		// they do not have a direct representation as a single byte,
-			encodable_.erase(it);
+		// therefore we need to check all UCS4 code points.
-			++start_encodable_;
+		// This is expensive!
-			it = encodable_.find(start_encodable_);
+		for (char_type c = 0; c < max_ucs4; ++c) {
+			std::vector<char> const eightbit = ucs4_to_eightbit(&c, 1, iconvName_);
+			if (!eightbit.empty()) {
+				CharInfoMap::const_iterator const it = unicodesymbols.find(c);
+				if (it == unicodesymbols.end() || !it->second.force)
+					encodable_.insert(c);
+			}
 		}
 	}
+	lyxerr.enable();
+	CharSet::iterator it = encodable_.find(start_encodable_);
+	while (it != encodable_.end()) {
+		encodable_.erase(it);
+		++start_encodable_;
+		it = encodable_.find(start_encodable_);
+	}
+	complete_ = true;
 }
 
 
 docstring const Encoding::latexChar(char_type c) const
 {
+	// validate() should have been called before
+	//BOOST_ASSERT(complete_);
+
 	if (c < start_encodable_)
 		return docstring(1, c);
 	if (encodable_.find(c) == encodable_.end()) {
@@ -360,8 +394,32 @@ void Encodings::read(FileName const & encfile, FileName const & symbolsfile)
 			string const latexname = lex.getString();
 			lex.next();
 			string const iconvname = lex.getString();
+			lex.next();
+			string const width = lex.getString();
+			bool fixedwidth;
+			if (width == "fixed")
+				fixedwidth = true;
+			else if (width == "variable")
+				fixedwidth = false;
+			else
+				lex.printError("Encodings::read: "
+				               "Unknown width: `$$Token'");
+			lex.next();
+			string const p = lex.getString();
+			Encoding::Package package;
+			if (p == "none")
+				package = Encoding::none;
+			else if (p == "inputenc")
+				package = Encoding::inputenc;
+			else if (p == "CJK")
+				package = Encoding::CJK;
+			else
+				lex.printError("Encodings::read: "
+				               "Unknown package: `$$Token'");
 			LYXERR(Debug::INFO) << "Reading encoding " << name << endl;
-			encodinglist[name] = Encoding(name, latexname, iconvname);
+			encodinglist[name] = Encoding(name, latexname,
+			                              iconvname, fixedwidth,
+			                              package);
 			if (lex.lex() != et_end)
 				lex.printError("Encodings::read: "
 					       "missing end");

src/Encoding.h

@@ -28,11 +28,19 @@ class LaTeXFeatures;
 ///
 class Encoding {
 public:
+	/// Which LaTeX package handles this encoding?
+	enum Package {
+		none,
+		inputenc,
+		CJK
+	};
 	///
 	Encoding() {}
 	///
 	Encoding(std::string const & n, std::string const & l,
-	         std::string const & i);
+	         std::string const & i, bool f, Package p);
+	///
+	void init() const;
 	///
 	std::string const & name() const { return Name_; }
 	///
@@ -48,6 +56,8 @@ public:
 	 * character is returned.
 	 */
 	docstring const latexChar(char_type c) const;
+	/// Which LaTeX package handles this encoding?
+	Package package() const { return package_; }
 private:
 	///
 	std::string Name_;
@@ -55,15 +65,27 @@ private:
 	std::string LatexName_;
 	///
 	std::string iconvName_;
+	/// Is this a fixed width encoding?
+	bool fixedwidth_;
 	///
 	typedef std::set<char_type> CharSet;
 	/// Set of UCS4 characters that we can encode (for singlebyte
 	/// encodings only)
-	CharSet encodable_;
+	mutable CharSet encodable_;
 	/// All code points below this are encodable. This helps us to avoid
 	/// lokup of ASCII characters in encodable_ and gives about 1 sec
 	/// speedup on export of the Userguide.
-	char_type start_encodable_;
+	mutable char_type start_encodable_;
+	/// Which LaTeX package handles this encoding?
+	Package package_;
+	/**
+	 * If this is true the stored information about the encoding covers
+	 * all encodable characters. We set this to false initially so that
+	 * we only need to query iconv for the actually used encodings.
+	 * This is needed especially for the multibyte encodings, if we
+	 * complete all encoding info on startup it takes 2-3 minutes.
+	 */
+	mutable bool complete_;
 };
 
 class Encodings {

src/Font.cpp

@@ -18,11 +18,14 @@
 
 #include "BufferParams.h" // stateText
 #include "debug.h"
+#include "Encoding.h"
 #include "gettext.h"
 #include "Language.h"
 #include "Color.h"
 #include "Lexer.h"
 #include "LyXRC.h"
+#include "output_latex.h"
+#include "OutputParams.h"
 
 #include "support/lstrings.h"
 
@@ -163,37 +166,37 @@ bool operator==(Font::FontBits const & lhs,
 
 
 Font::Font()
-	: bits(sane), lang(default_language)
+	: bits(sane), lang(default_language), open_encoding_(false)
 {}
 
 
 Font::Font(Font::FONT_INIT1)
-	: bits(inherit), lang(default_language)
+	: bits(inherit), lang(default_language), open_encoding_(false)
 {}
 
 
 Font::Font(Font::FONT_INIT2)
-	: bits(ignore), lang(ignore_language)
+	: bits(ignore), lang(ignore_language), open_encoding_(false)
 {}
 
 
 Font::Font(Font::FONT_INIT3)
-	: bits(sane), lang(default_language)
+	: bits(sane), lang(default_language), open_encoding_(false)
 {}
 
 
 Font::Font(Font::FONT_INIT1, Language const * l)
-	: bits(inherit), lang(l)
+	: bits(inherit), lang(l), open_encoding_(false)
 {}
 
 
 Font::Font(Font::FONT_INIT2, Language const * l)
-	: bits(ignore), lang(l)
+	: bits(ignore), lang(l), open_encoding_(false)
 {}
 
 
 Font::Font(Font::FONT_INIT3, Language const * l)
-	: bits(sane), lang(l)
+	: bits(sane), lang(l), open_encoding_(false)
 {}
 
 
@@ -736,7 +739,9 @@ void Font::lyxWriteChanges(Font const & orgfont,
 
 /// Writes the head of the LaTeX needed to impose this font
 // Returns number of chars written.
-int Font::latexWriteStartChanges(odocstream & os, Font const & base,
+int Font::latexWriteStartChanges(odocstream & os, BufferParams const & bparams,
+                                    OutputParams const & runparams,
+                                    Font const & base,
                                     Font const & prev) const
 {
 	bool env = false;
@@ -758,6 +763,20 @@ int Font::latexWriteStartChanges(odocstream & os, Font const & base,
 				      "$$lang", language()->babel());
 			os << from_ascii(tmp);
 			count += tmp.length();
+		} else {
+			os << '{';
+			count += 1;
+		}
+	}
+
+	if (language()->encoding()->package() == Encoding::CJK) {
+		int const c = switchEncoding(os, bparams,
+				runparams.moving_arg, *(runparams.encoding),
+				*(language()->encoding()));
+		if (c > 0) {
+			open_encoding_ = true;
+			count += c;
+			runparams.encoding = language()->encoding();
 		}
 	}
 
@@ -832,7 +851,9 @@ int Font::latexWriteStartChanges(odocstream & os, Font const & base,
 /// Writes ending block of LaTeX needed to close use of this font
 // Returns number of chars written
 // This one corresponds to latexWriteStartChanges(). (Asger)
-int Font::latexWriteEndChanges(odocstream & os, Font const & base,
+int Font::latexWriteEndChanges(odocstream & os, BufferParams const & bparams,
+                                  OutputParams const & runparams,
+                                  Font const & base,
                                   Font const & next) const
 {
 	int count = 0;
@@ -893,6 +914,19 @@ int Font::latexWriteEndChanges(odocstream & os, Font const & base,
 		count += 6;
 	}
 
+	if (open_encoding_) {
+		// We need to close the encoding even if it does not change
+		// to do correct environment nesting
+		Encoding const * const ascii = encodings.getFromLyXName("ascii");
+		int const c = switchEncoding(os, bparams,
+				runparams.moving_arg, *(runparams.encoding),
+				*ascii);
+		BOOST_ASSERT(c > 0);
+		count += c;
+		runparams.encoding = ascii;
+		open_encoding_ = false;
+	}
+
 	if (language() != base.language() && language() != next.language()) {
 		os << '}';
 		++count;

src/Font.h

@@ -25,6 +25,7 @@ namespace lyx {
 class Lexer;
 class BufferParams;
 class Language;
+class OutputParams;
 
 
 ///
@@ -296,14 +297,18 @@ public:
 	    to this font. Returns number of chars written. Base is the
 	    font state active now.
 	*/
-	int latexWriteStartChanges(odocstream &, Font const & base,
+	int latexWriteStartChanges(odocstream &, BufferParams const & bparams,
+	                           OutputParams const & runparams,
+	                           Font const & base,
 	                           Font const & prev) const;
 
 	/** Writes the tail of the LaTeX needed to change to this font.
 	    Returns number of chars written. Base is the font state we want
 	    to achieve.
 	*/
-	int latexWriteEndChanges(odocstream &, Font const & base,
+	int latexWriteEndChanges(odocstream &, BufferParams const & bparams,
+	                         OutputParams const & runparams,
+	                         Font const & base,
 	                         Font const & next) const;
 
 
@@ -348,6 +353,8 @@ private:
 	/// Updates a misc setting according to request
 	Font::FONT_MISC_STATE setMisc(Font::FONT_MISC_STATE newfont,
 					 Font::FONT_MISC_STATE org);
+	/// Did latexWriteStartChanges open an encoding environment?
+	mutable bool open_encoding_;
 };
 
 

src/LaTeXFeatures.cpp

@@ -344,26 +344,29 @@ string LaTeXFeatures::getLanguages() const
 {
 	ostringstream languages;
 
-	for (LanguageList::const_iterator cit =
+	LanguageList::const_iterator const begin = UsedLanguages_.begin();
-		    UsedLanguages_.begin();
+	for (LanguageList::const_iterator cit = begin;
 	     cit != UsedLanguages_.end();
-	     ++cit)
+	     ++cit) {
-		languages << (*cit)->babel() << ',';
+		if (cit != begin)
+			languages << ',';
+		languages << (*cit)->babel();
+	}
 	return languages.str();
 }
 
 
 set<string> LaTeXFeatures::getEncodingSet(string const & doc_encoding) const
 {
+	// This does only find encodings of languages supported by babel, but
+	// that does not matter since we don't have a language with an
+	// encoding supported by inputenc but without babel support.
 	set<string> encodings;
 	LanguageList::const_iterator it  = UsedLanguages_.begin();
 	LanguageList::const_iterator end = UsedLanguages_.end();
 	for (; it != end; ++it)
-		// thailatex does not use the inputenc package, but sets up
-		// babel directly for tis620-0 encoding, therefore we must
-		// not add tis620-0 to the encoding set.
 		if ((*it)->encoding()->latexName() != doc_encoding &&
-		    (*it)->encoding()->name() != "tis620-0")
+		    (*it)->encoding()->package() == Encoding::inputenc)
 			encodings.insert((*it)->encoding()->latexName());
 	return encodings;
 }

src/LaTeXFeatures.h

@@ -118,7 +118,7 @@ private:
 	static PackagesList packages_;
 	///
 	typedef std::set<Language const *> LanguageList;
-	///
+	/// used languages (only those that are supported by babel)
 	LanguageList UsedLanguages_;
 	///
 	typedef std::set<std::string> UsedFloats;

src/Paragraph.cpp

@@ -702,7 +702,8 @@ void Paragraph::Pimpl::simpleTeXSpecialChars(Buffer const & buf,
 			} else {
 				if (open_font) {
 					column += running_font.latexWriteEndChanges(
-						os, basefont, basefont);
+						os, bparams, runparams,
+						basefont, basefont);
 					open_font = false;
 				}
 
@@ -757,7 +758,8 @@ void Paragraph::Pimpl::simpleTeXSpecialChars(Buffer const & buf,
 		// some insets cannot be inside a font change command
 		if (open_font && inset->noFontChange()) {
 			column += running_font.latexWriteEndChanges(
-					os, basefont, basefont);
+					os, bparams, runparams,
+						basefont, basefont);
 			open_font = false;
 			basefont = owner_->getLayoutFont(bparams, outerfont);
 			running_font = basefont;
@@ -991,7 +993,7 @@ void Paragraph::Pimpl::validate(LaTeXFeatures & features,
 		{
 			features.useLanguage(language);
 			LYXERR(Debug::LATEX) << "Found language "
-					     << language->babel() << endl;
+					     << language->lang() << endl;
 		}
 	}
 
@@ -1975,7 +1977,8 @@ bool Paragraph::simpleTeXOnePar(Buffer const & buf,
 			if (body_pos > 0) {
 				if (open_font) {
 					column += running_font.latexWriteEndChanges(
-						os, basefont, basefont);
+						os, bparams, runparams,
+						basefont, basefont);
 					open_font = false;
 				}
 				basefont = getLayoutFont(bparams, outerfont);
@@ -2027,19 +2030,22 @@ bool Paragraph::simpleTeXOnePar(Buffer const & buf,
 		     font.language() != running_font.language()))
 		{
 			column += running_font.latexWriteEndChanges(
-					os, basefont,
+					os, bparams, runparams, basefont,
 					(i == body_pos-1) ? basefont : font);
 			running_font = basefont;
 			open_font = false;
 		}
 
 		// Switch file encoding if necessary
-		int const count = switchEncoding(os, bparams,
+		if (runparams.encoding->package() == Encoding::inputenc &&
-				runparams.moving_arg, *(runparams.encoding),
+		    font.language()->encoding()->package() == Encoding::inputenc) {
-				*(font.language()->encoding()));
+			int const count = switchEncoding(os, bparams,
-		if (count > 0) {
+					runparams.moving_arg, *(runparams.encoding),
-			column += count;
+					*(font.language()->encoding()));
-			runparams.encoding = font.language()->encoding();
+			if (count > 0) {
+				column += count;
+				runparams.encoding = font.language()->encoding();
+			}
 		}
 
 		// Do we need to change font?
@@ -2047,7 +2053,8 @@ bool Paragraph::simpleTeXOnePar(Buffer const & buf,
 		     font.language() != running_font.language()) &&
 			i != body_pos - 1)
 		{
-			column += font.latexWriteStartChanges(os, basefont,
+			column += font.latexWriteStartChanges(os, bparams,
+			                                      runparams, basefont,
 			                                      last_font);
 			running_font = font;
 			open_font = true;
@@ -2087,11 +2094,12 @@ bool Paragraph::simpleTeXOnePar(Buffer const & buf,
 #ifdef FIXED_LANGUAGE_END_DETECTION
 		if (next_) {
 			running_font
-				.latexWriteEndChanges(os, basefont,
+				.latexWriteEndChanges(os, bparams, runparams,
+					basefont,
 					next_->getFont(bparams, 0, outerfont));
 		} else {
-			running_font.latexWriteEndChanges(os, basefont,
+			running_font.latexWriteEndChanges(os, bparams,
-							  basefont);
+					runparams, basefont, basefont);
 		}
 #else
 #ifdef WITH_WARNINGS
@@ -2099,7 +2107,8 @@ bool Paragraph::simpleTeXOnePar(Buffer const & buf,
 //#warning there as we start another \selectlanguage with the next paragraph if
 //#warning we are in need of this. This should be fixed sometime (Jug)
 #endif
-		running_font.latexWriteEndChanges(os, basefont, basefont);
+		running_font.latexWriteEndChanges(os, bparams, runparams,
+				basefont, basefont);
 #endif
 	}
 

src/output_latex.cpp

@@ -297,7 +297,8 @@ TeXOnePar(Buffer const & buf,
 	}
 
 	// Switch file encoding if necessary
-	if (bparams.inputenc == "auto") {
+	if (bparams.inputenc == "auto" &&
+	    runparams.encoding->package() == Encoding::inputenc) {
 		// Look ahead for future encoding changes.
 		// We try to output them at the beginning of the paragraph,
 		// since the \inputencoding command is not allowed e.g. in
@@ -313,7 +314,8 @@ TeXOnePar(Buffer const & buf,
 			// encoding to that required by the language of c.
 			Encoding const * const encoding =
 				pit->getFontSettings(bparams, i).language()->encoding();
-			if (switchEncoding(os, bparams, false,
+			if (encoding->package() == Encoding::inputenc &&
+			    switchEncoding(os, bparams, false,
 			                   *(runparams.encoding), *encoding) > 0) {
 				runparams.encoding = encoding;
 				os << '\n';
@@ -601,25 +603,44 @@ int switchEncoding(odocstream & os, BufferParams const & bparams,
                    bool moving_arg, Encoding const & oldEnc,
                    Encoding const & newEnc)
 {
-	// FIXME thailatex does not support the inputenc package, so we
+	// FIXME We ignore encoding switches from/to encodings that do
-	// ignore switches from/to tis620-0 encoding here. This does of
+	// neither support the inputenc package nor the CJK package here.
-	// course only work as long as the non-thai text contains ASCII
+	// This does of course only work in special cases (e.g. switch from
-	// only, but it is the best we can do.
+	// tis620-0 to latin1, but the text in latin1 contains ASCII only,
-	// Since the \inputencoding command does not work inside sections
+	// but it is the best we can do
-	// we ignore the encoding switch also in moving arguments.
 	if (((bparams.inputenc == "auto" && !moving_arg) ||
 	     bparams.inputenc == "default") &&
 	    oldEnc.name() != newEnc.name() &&
-	    oldEnc.name() != "ascii" && newEnc.name() != "ascii" &&
+	    oldEnc.package() != Encoding::none &&
-	    oldEnc.name() != "tis620-0" && newEnc.name() != "tis620-0") {
+	    newEnc.package() != Encoding::none) {
 		LYXERR(Debug::LATEX) << "Changing LaTeX encoding from "
 		                     << oldEnc.name() << " to "
 		                     << newEnc.name() << endl;
 		os << setEncoding(newEnc.iconvName());
 		if (bparams.inputenc != "default") {
 			docstring const inputenc(from_ascii(newEnc.latexName()));
-			os << "\\inputencoding{" << inputenc << '}';
+			switch (newEnc.package()) {
-			return 16 + inputenc.length();
+				case Encoding::none:
+					break;
+				case Encoding::inputenc: {
+					int count = inputenc.length();
+					if (oldEnc.package() == Encoding::CJK) {
+						os << "\\end{CJK}";
+						count += 9;
+					}
+					os << "\\inputencoding{" << inputenc << '}';
+					return count + 16;
+				}
+				case Encoding::CJK: {
+					int count = inputenc.length();
+					if (oldEnc.package() == Encoding::CJK) {
+						os << "\\end{CJK}";
+						count += 9;
+					}
+					os << "\\begin{CJK}{" << inputenc << "}{}";
+					return count + 15;
+				}
+			}
 		}
 	}
 	return 0;