]> git.lyx.org Git - lyx.git/blobdiff - src/Encoding.cpp
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[lyx.git] / src / Encoding.cpp
index cacb31de4f33be56b80fed475bf416eb3639b2d7..48e9271395fc43dcdf5bafca902b8067e14dbdec 100644 (file)
@@ -3,7 +3,7 @@
  * This file is part of LyX, the document processor.
  * Licence details can be found in the file COPYING.
  *
- * \author Lars Gullik Bjønnes
+ * \author Lars Gullik Bjønnes
  * \author Jean-Marc Lasgouttes
  * \author Dekel Tsur
  *
 
 #include "Encoding.h"
 
+#include "Buffer.h"
+#include "BufferList.h"
+#include "InsetIterator.h"
 #include "LaTeXFeatures.h"
 #include "Lexer.h"
 #include "LyXRC.h"
 
 #include "support/debug.h"
+#include "support/gettext.h"
 #include "support/FileName.h"
 #include "support/lstrings.h"
+#include "support/textutils.h"
 #include "support/unicode.h"
 
 #include <boost/cstdint.hpp>
@@ -34,6 +39,10 @@ namespace lyx {
 
 Encodings encodings;
 
+Encodings::MathCommandSet Encodings::mathcmd;
+Encodings::TextCommandSet Encodings::textcmd;
+Encodings::MathSymbolSet  Encodings::mathsym;
+
 namespace {
 
 char_type arabic_table[172][4] = {
@@ -220,26 +229,62 @@ char_type const arabic_start = 0x0621;
 char_type const arabic_end = 0x06cc;
 
 
+enum CharInfoFlags {
+       ///
+       CharInfoCombining = 1,
+       ///
+       CharInfoTextFeature = 2,
+       ///
+       CharInfoMathFeature = 4,
+       ///
+       CharInfoForce = 8,
+       ///
+       CharInfoTextNoTermination = 16,
+       ///
+       CharInfoMathNoTermination = 32,
+};
+
 /// Information about a single UCS4 character
 struct CharInfo {
-       /// LaTeX command for this character
-       docstring command;
-       /// Needed LaTeX preamble (or feature)
-       string preamble;
+       /// LaTeX command (text mode) for this character
+       docstring textcommand;
+       /// LaTeX command (math mode) for this character
+       docstring mathcommand;
+       /// Needed LaTeX preamble (or feature) for text mode
+       string textpreamble;
+       /// Needed LaTeX preamble (or feature) for math mode
+       string mathpreamble;
        /// Is this a combining character?
-       bool combining;
-       /// Is \c preamble a feature known by LaTeXFeatures, or a raw LaTeX
+       bool combining() const { return flags & CharInfoCombining ? true : false; }
+       /// Is \c textpreamble a feature known by LaTeXFeatures, or a raw LaTeX
+       /// command?
+       bool textfeature() const { return flags & CharInfoTextFeature ? true : false; }
+       /// Is \c mathpreamble a feature known by LaTeXFeatures, or a raw LaTeX
        /// command?
-       bool feature;
+       bool mathfeature() const { return flags & CharInfoMathFeature ? true : false; }
        /// Always force the LaTeX command, even if the encoding contains
        /// this character?
-       bool force;
+       bool force() const { return flags & CharInfoForce ? true : false; }
+       /// TIPA shortcut
+       string tipashortcut;
+       /// \c textcommand needs no termination (such as {} or space).
+       bool textnotermination() const { return flags & CharInfoTextNoTermination ? true : false; }
+       /// \c mathcommand needs no termination (such as {} or space).
+       bool mathnotermination() const { return flags & CharInfoMathNoTermination ? true : false; }
+       ///
+       unsigned int flags;
 };
 
 
 typedef map<char_type, CharInfo> CharInfoMap;
 CharInfoMap unicodesymbols;
 
+typedef std::set<char_type> CharSet;
+CharSet forced;
+
+typedef std::set<char_type> MathAlphaSet;
+MathAlphaSet mathalpha;
+
 
 /// The highest code point in UCS4 encoding (1<<20 + 1<<16)
 char_type const max_ucs4 = 0x110000;
@@ -259,9 +304,10 @@ const char * EncodingException::what() const throw()
 }
 
 
-Encoding::Encoding(string const & n, string const & l, string const & i,
-                  bool f, Encoding::Package p)
-       : Name_(n), LatexName_(l), iconvName_(i), fixedwidth_(f), package_(p)
+Encoding::Encoding(string const & n, string const & l, string const & g,
+                  string const & i, bool f, bool u, Encoding::Package p)
+       : name_(n), latexName_(l), guiName_(g), iconvName_(i), fixedwidth_(f),
+         unsafe_(u), package_(p)
 {
        if (n == "ascii") {
                // ASCII can encode 128 code points and nothing else
@@ -295,7 +341,7 @@ void Encoding::init() const
                                continue;
                        char_type const uc = ucs4[0];
                        CharInfoMap::const_iterator const it = unicodesymbols.find(uc);
-                       if (it == unicodesymbols.end() || !it->second.force)
+                       if (it == unicodesymbols.end() || !it->second.force())
                                encodable_.insert(uc);
                }
        } else {
@@ -307,7 +353,7 @@ void Encoding::init() const
                        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)
+                               if (it == unicodesymbols.end() || !it->second.force())
                                        encodable_.insert(c);
                        }
                }
@@ -323,57 +369,377 @@ void Encoding::init() const
 }
 
 
-docstring const Encoding::latexChar(char_type c) const
+bool Encoding::encodable(char_type c) const
 {
        // assure the used encoding is properly initialized
        init();
 
-       if (c < start_encodable_)
-               return docstring(1, c);
+       if (iconvName_ == "UTF-8" && package_ == none)
+               return true;
+       if (c < start_encodable_ && !encodings.isForced(c))
+               return true;
        if (encodable_.find(c) != encodable_.end())
-               return docstring(1, c);
+               return true;
+       return false;
+}
+
+
+pair<docstring, bool> Encoding::latexChar(char_type c) const
+{
+       if (encodable(c))
+               return make_pair(docstring(1, c), false);
 
-       // c cannot be encoded in this encoding
+       // c cannot (or should not) be encoded in this encoding
        CharInfoMap::const_iterator const it = unicodesymbols.find(c);
        if (it == unicodesymbols.end())
                throw EncodingException(c);
-       else
-               return it->second.command;
+       // at least one of mathcommand and textcommand is nonempty
+       if (it->second.textcommand.empty())
+               return make_pair(
+                       "\\ensuremath{" + it->second.mathcommand + '}', false);
+       return make_pair(it->second.textcommand, !it->second.textnotermination());
 }
 
 
-set<char_type> Encoding::getSymbolsList() const
+pair<docstring, docstring> Encoding::latexString(docstring const input, bool dryrun) const
+{
+       docstring result;
+       docstring uncodable;
+       bool terminate = false;
+       for (size_t n = 0; n < input.size(); ++n) {
+               try {
+                       char_type const c = input[n];
+                       pair<docstring, bool> latex_char = latexChar(c);
+                       docstring const latex = latex_char.first;
+                       if (terminate && !prefixIs(latex, '\\')
+                           && !prefixIs(latex, '{')
+                           && !prefixIs(latex, '}')) {
+                                       // Prevent eating of a following
+                                       // space or command corruption by
+                                       // following characters
+                                       if (latex == " ")
+                                               result += "{}";
+                                       else
+                                               result += " ";
+                               }
+                       result += latex;
+                       terminate = latex_char.second;
+               } catch (EncodingException & /* e */) {
+                       LYXERR0("Uncodable character in latexString!");
+                       if (dryrun) {
+                               result += "<" + _("LyX Warning: ")
+                                          + _("uncodable character") + " '";
+                               result += docstring(1, input[n]);
+                               result += "'>";
+                       } else
+                               uncodable += input[n];
+               }
+       }
+       return make_pair(result, uncodable);
+}
+
+
+vector<char_type> Encoding::symbolsList() const
 {
        // assure the used encoding is properly initialized
        init();
 
        // first all encodable characters
-       CharSet symbols = encodable_;
+       vector<char_type> symbols(encodable_.begin(), encodable_.end());
        // add those below start_encodable_
        for (char_type c = 0; c < start_encodable_; ++c)
-               symbols.insert(c);
+               symbols.push_back(c);
        // now the ones from the unicodesymbols file
        CharInfoMap::const_iterator const end = unicodesymbols.end();
        CharInfoMap::const_iterator it = unicodesymbols.begin();
        for (; it != end; ++it)
-               symbols.insert(it->first);
+               symbols.push_back(it->first);
+       return symbols;
+}
+
+
+bool Encodings::latexMathChar(char_type c, bool mathmode,
+                       Encoding const * encoding, docstring & command,
+                       bool & needsTermination)
+{
+       command = empty_docstring();
+       if (encoding)
+               if (encoding->encodable(c))
+                       command = docstring(1, c);
+       needsTermination = false;
+
+       CharInfoMap::const_iterator const it = unicodesymbols.find(c);
+       if (it == unicodesymbols.end()) {
+               if (!encoding || command.empty())
+                       throw EncodingException(c);
+               if (mathmode)
+                       addMathSym(c);
+               return false;
+       }
+       // at least one of mathcommand and textcommand is nonempty
+       bool use_math = (mathmode && !it->second.mathcommand.empty()) ||
+                       (!mathmode && it->second.textcommand.empty());
+       if (use_math) {
+               command = it->second.mathcommand;
+               needsTermination = !it->second.mathnotermination();
+               addMathCmd(c);
+       } else {
+               if (!encoding || command.empty()) {
+                       command = it->second.textcommand;
+                       needsTermination = !it->second.textnotermination();
+                       addTextCmd(c);
+               }
+               if (mathmode)
+                       addMathSym(c);
+       }
+       return use_math;
+}
+
+
+char_type Encodings::fromLaTeXCommand(docstring const & cmd, int cmdtype,
+               bool & combining, bool & needsTermination, set<string> * req)
+{
+       CharInfoMap::const_iterator const end = unicodesymbols.end();
+       CharInfoMap::const_iterator it = unicodesymbols.begin();
+       for (combining = false; it != end; ++it) {
+               docstring const math = it->second.mathcommand;
+               docstring const text = it->second.textcommand;
+               if ((cmdtype & MATH_CMD) && math == cmd) {
+                       combining = it->second.combining();
+                       needsTermination = !it->second.mathnotermination();
+                       if (req && it->second.mathfeature() &&
+                           !it->second.mathpreamble.empty())
+                               req->insert(it->second.mathpreamble);
+                       return it->first;
+               }
+               if ((cmdtype & TEXT_CMD) && text == cmd) {
+                       combining = it->second.combining();
+                       needsTermination = !it->second.textnotermination();
+                       if (req && it->second.textfeature() &&
+                           !it->second.textpreamble.empty())
+                               req->insert(it->second.textpreamble);
+                       return it->first;
+               }
+       }
+       needsTermination = false;
+       return 0;
+}
+
+
+docstring Encodings::fromLaTeXCommand(docstring const & cmd, int cmdtype,
+               bool & needsTermination, docstring & rem, set<string> * req)
+{
+       needsTermination = false;
+       rem = empty_docstring();
+       bool const mathmode = cmdtype & MATH_CMD;
+       bool const textmode = cmdtype & TEXT_CMD;
+       docstring symbols;
+       size_t i = 0;
+       size_t const cmdend = cmd.size();
+       CharInfoMap::const_iterator const uniend = unicodesymbols.end();
+       for (size_t j = 0; j < cmdend; ++j) {
+               // Also get the char after a backslash
+               if (j + 1 < cmdend && cmd[j] == '\\')
+                       ++j;
+               // If a macro argument follows, get it, too
+               if (j + 1 < cmdend && cmd[j + 1] == '{') {
+                       size_t k = j + 1;
+                       int count = 1;
+                       while (k < cmdend && count && k != docstring::npos) {
+                               k = cmd.find_first_of(from_ascii("{}"), k + 1);
+                               if (cmd[k] == '{')
+                                       ++count;
+                               else
+                                       --count;
+                       }
+                       if (k != docstring::npos)
+                               j = k;
+               }
+               // Start with this substring and try augmenting it when it is
+               // the prefix of some command in the unicodesymbols file
+               docstring const subcmd = cmd.substr(i, j - i + 1);
+
+               CharInfoMap::const_iterator it = unicodesymbols.begin();
+               size_t unicmd_size = 0;
+               char_type c = 0;
+               for (; it != uniend; ++it) {
+                       docstring const math = mathmode ? it->second.mathcommand
+                                                       : docstring();
+                       docstring const text = textmode ? it->second.textcommand
+                                                       : docstring();
+                       size_t cur_size = max(math.size(), text.size());
+                       // The current math or text unicode command cannot
+                       // match, or we already matched a longer one
+                       if (cur_size < subcmd.size() || cur_size <= unicmd_size)
+                               continue;
+
+                       docstring tmp = subcmd;
+                       size_t k = j;
+                       while (prefixIs(math, tmp) || prefixIs(text, tmp)) {
+                               ++k;
+                               if (k >= cmdend || cur_size <= tmp.size())
+                                       break;
+                               tmp += cmd[k];
+                       }
+                       // No match
+                       if (k == j)
+                               continue;
+
+                       // The last added char caused a mismatch, because
+                       // we didn't exhaust the chars in cmd and didn't
+                       // exceed the maximum size of the current unicmd
+                       if (k < cmdend && cur_size > tmp.size())
+                               tmp.resize(tmp.size() - 1);
+
+                       // If this is an exact match, we found a (longer)
+                       // matching entry in the unicodesymbols file.
+                       // If the entry doesn't start with '\', we take note
+                       // of the match and continue (this is not a ultimate
+                       // acceptance, as some other entry may match a longer
+                       // portion of the cmd string). However, if the entry
+                       // does start with '\', we accept the match only if
+                       // this is a valid macro, i.e., either it is a single
+                       // (nonletter) char macro, or nothing else follows,
+                       // or what follows is a nonletter char, or the last
+                       // character is a }.
+                       if ((math == tmp || text == tmp)
+                           && (tmp[0] != '\\'
+                                  || (tmp.size() == 2 && !isAlphaASCII(tmp[1]))
+                                  || k == cmdend 
+                                  || !isAlphaASCII(cmd[k])
+                                  || tmp[tmp.size() - 1] == '}')
+                                ) {
+                               c = it->first;
+                               j = k - 1;
+                               i = j + 1;
+                               unicmd_size = cur_size;
+                               if (math == tmp)
+                                       needsTermination = !it->second.mathnotermination();
+                               else
+                                       needsTermination = !it->second.textnotermination();
+                               if (req) {
+                                       if (math == tmp && it->second.mathfeature() &&
+                                           !it->second.mathpreamble.empty())
+                                               req->insert(it->second.mathpreamble);
+                                       if (text == tmp && it->second.textfeature() &&
+                                           !it->second.textpreamble.empty())
+                                               req->insert(it->second.textpreamble);
+                               }
+                       }
+               }
+               if (unicmd_size)
+                       symbols += c;
+               else if (j + 1 == cmdend) {
+                       // No luck. Return what remains
+                       rem = cmd.substr(i);
+                       if (needsTermination && !rem.empty()) {
+                               if (rem.substr(0, 2) == "{}") {
+                                       rem = rem.substr(2);
+                                       needsTermination = false;
+                               } else if (rem[0] == ' ') {
+                                       needsTermination = false;
+                                       // LaTeX would swallow all spaces
+                                       rem = ltrim(rem);
+                               }
+                       }
+               }
+       }
        return symbols;
 }
 
 
-void Encodings::validate(char_type c, LaTeXFeatures & features)
+void Encodings::initUnicodeMath(Buffer const & buffer, bool for_master)
+{
+#ifdef TEX2LYX
+       // The code below is not needed in tex2lyx and requires additional stuff
+       (void)buffer;
+       (void)for_master;
+#else
+       if (for_master) {
+               mathcmd.clear();
+               textcmd.clear();
+               mathsym.clear();
+       }
+
+       // Check this buffer
+       Inset & inset = buffer.inset();
+       InsetIterator it = inset_iterator_begin(inset);
+       InsetIterator const end = inset_iterator_end(inset);
+       for (; it != end; ++it)
+               it->initUnicodeMath();
+
+       if (!for_master)
+               return;
+
+       // Check children
+       ListOfBuffers blist = buffer.getDescendents();
+       ListOfBuffers::const_iterator bit = blist.begin();
+       ListOfBuffers::const_iterator const bend = blist.end();
+       for (; bit != bend; ++bit)
+               initUnicodeMath(**bit, false);
+#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() && !it->second.preamble.empty()) {
-               if (it->second.feature)
-                       features.require(it->second.preamble);
-               else
-                       features.addPreambleSnippet(it->second.preamble);
+       if (it != unicodesymbols.end()) {
+               // In mathed, c could be used both in textmode and mathmode
+               bool const math_mode = for_mathed && isMathCmd(c);
+               bool const use_math = math_mode ||
+                                     (!for_mathed && it->second.textcommand.empty());
+               bool const use_text = (for_mathed && isTextCmd(c)) ||
+                                     (!for_mathed && !it->second.textcommand.empty());
+               bool const plain_utf8 = (features.runparams().encoding->name() == "utf8-plain");
+               bool const unicode_math = (features.isRequired("unicode-math")
+                       && features.isAvailable("unicode-math"));
+               // with utf8-plain, we only load packages when in mathed (see #7766)
+               // and if we do not use unicode-math
+               if ((math_mode && !unicode_math)
+                    || (use_math && !plain_utf8)) {
+                       if (!it->second.mathpreamble.empty()) {
+                               if (it->second.mathfeature()) {
+                                       string feats = it->second.mathpreamble;
+                                       while (!feats.empty()) {
+                                               string feat;
+                                               feats = split(feats, feat, ',');
+                                               features.require(feat);
+                                       }
+                               } else
+                                       features.addPreambleSnippet(it->second.mathpreamble);
+                       }
+               }
+               // with utf8-plain, we do not load packages (see #7766)
+               if (use_text && !plain_utf8) {
+                       if (!it->second.textpreamble.empty()) {
+                               if (it->second.textfeature()) {
+                                       string feats = it->second.textpreamble;
+                                       while (!feats.empty()) {
+                                               string feat;
+                                               feats = split(feats, feat, ',');
+                                               features.require(feat);
+                                       }
+                               } else
+                                       features.addPreambleSnippet(it->second.textpreamble);
+                       }
+               }
+       }
+       if (for_mathed && isMathSym(c)) {
+               features.require("amstext");
+               features.require("lyxmathsym");
        }
+#endif
 }
 
 
-bool Encodings::isComposeChar_hebrew(char_type c)
+bool Encodings::isHebrewComposeChar(char_type c)
 {
        return c <= 0x05c2 && c >= 0x05b0 && c != 0x05be && c != 0x05c0;
 }
@@ -383,7 +749,7 @@ bool Encodings::isComposeChar_hebrew(char_type c)
 // they are hamza, alef_madda, alef_hamza, waw_hamza, alef_hamza_under,
 // alef, tah_marbota, dal, thal, rah, zai, wow, alef_maksoura
 
-bool Encodings::is_arabic_special(char_type c)
+bool Encodings::isArabicSpecialChar(char_type c)
 {
        return (c >= 0x0621 && c <= 0x0625) || (c >= 0x0630 && c <= 0x0632)
                || c == 0x0627 || c == 0x0629 || c == 0x062f || c == 0x0648
@@ -391,26 +757,22 @@ bool Encodings::is_arabic_special(char_type c)
 }
 
 
-bool Encodings::isComposeChar_arabic(char_type c)
+bool Encodings::isArabicComposeChar(char_type c)
 {
        return c >= 0x064b && c <= 0x0652;
 }
 
 
-bool Encodings::is_arabic(char_type c)
+bool Encodings::isArabicChar(char_type c)
 {
        return c >= arabic_start && c <= arabic_end
                && arabic_table[c-arabic_start][0];
 }
 
 
-char_type Encodings::transformChar(char_type c,
-                                     Encodings::Letter_Form form)
+char_type Encodings::transformChar(char_type c, Encodings::LetterForm form)
 {
-       if (!is_arabic(c))
-               return c;
-
-       return arabic_table[c-arabic_start][form];
+       return isArabicChar(c) ? arabic_table[c-arabic_start][form] : c;
 }
 
 
@@ -418,11 +780,20 @@ bool Encodings::isCombiningChar(char_type c)
 {
        CharInfoMap::const_iterator const it = unicodesymbols.find(c);
        if (it != unicodesymbols.end())
-               return it->second.combining;
+               return it->second.combining();
        return false;
 }
 
 
+string const Encodings::TIPAShortcut(char_type c)
+{
+       CharInfoMap::const_iterator const it = unicodesymbols.find(c);
+       if (it != unicodesymbols.end())
+               return it->second.tipashortcut;
+       return string();
+}
+
+
 bool Encodings::isKnownScriptChar(char_type const c, string & preamble)
 {
        CharInfoMap::const_iterator const it = unicodesymbols.find(c);
@@ -430,26 +801,48 @@ bool Encodings::isKnownScriptChar(char_type const c, string & preamble)
        if (it == unicodesymbols.end())
                return false;
 
-       if (it->second.preamble != "textgreek" && it->second.preamble != "textcyr")
+       if (it->second.textpreamble != "textgreek" && it->second.textpreamble != "textcyr")
                return false;
 
        if (preamble.empty()) {
-               preamble = it->second.preamble;
+               preamble = it->second.textpreamble;
                return true;
        }
-       return it->second.preamble == preamble;
+       return it->second.textpreamble == preamble;
 }
 
 
-Encoding const * Encodings::getFromLyXName(string const & name) const
+bool Encodings::isForced(char_type c)
+{
+       return (!forced.empty() && forced.find(c) != forced.end());
+}
+
+
+bool Encodings::isMathAlpha(char_type c)
+{
+       return mathalpha.count(c);
+}
+
+
+Encoding const *
+Encodings::fromLyXName(string const & name, bool allowUnsafe) const
 {
        EncodingList::const_iterator const it = encodinglist.find(name);
+       if (!allowUnsafe && it->second.unsafe())
+               return 0;
        return it != encodinglist.end() ? &it->second : 0;
 }
 
 
-Encoding const * Encodings::getFromLaTeXName(string const & name) const
+Encoding const *
+Encodings::fromLaTeXName(string const & n, bool allowUnsafe) const
 {
+       string name = n;
+       // FIXME: if we have to test for too many of these synonyms,
+       // we should instead extend the format of lib/encodings
+       if (n == "ansinew")
+               name = "cp1252";
+
        // We don't use find_if because it makes copies of the pairs in
        // the map.
        // This linear search is OK since we don't have many encodings.
@@ -457,30 +850,36 @@ Encoding const * Encodings::getFromLaTeXName(string const & name) const
        // most at the top of lib/encodings.
        EncodingList::const_iterator const end = encodinglist.end();
        for (EncodingList::const_iterator it = encodinglist.begin(); it != end; ++it)
-               if (it->second.latexName() == name)
+               if (it->second.latexName() == name) {
+                       if (!allowUnsafe && it->second.unsafe())
+                               return 0;
                        return &it->second;
+               }
        return 0;
 }
 
 
 Encodings::Encodings()
-{
-}
+{}
 
 
 void Encodings::read(FileName const & encfile, FileName const & symbolsfile)
 {
        // We must read the symbolsfile first, because the Encoding
        // constructor depends on it.
-       Lexer symbolslex(0, 0);
+       Lexer symbolslex;
        symbolslex.setFile(symbolsfile);
+       bool getNextToken = true;
        while (symbolslex.isOK()) {
                char_type symbol;
                CharInfo info;
                string flags;
 
-               if (!symbolslex.next(true))
-                       break;
+               if (getNextToken) {
+                       if (!symbolslex.next(true))
+                               break;
+               } else
+                       getNextToken = true;
 
                istringstream is(symbolslex.getString());
                // reading symbol directly does not work if
@@ -492,54 +891,113 @@ void Encodings::read(FileName const & encfile, FileName const & symbolsfile)
 
                if (!symbolslex.next(true))
                        break;
-               info.command = symbolslex.getDocString();
+               info.textcommand = symbolslex.getDocString();
                if (!symbolslex.next(true))
                        break;
-               info.preamble = symbolslex.getString();
+               info.textpreamble = symbolslex.getString();
                if (!symbolslex.next(true))
                        break;
                flags = symbolslex.getString();
 
-               info.combining = false;
-               info.feature = false;
-               info.force = false;
+               info.flags = 0;
+               if (suffixIs(info.textcommand, '}'))
+                       info.flags |= CharInfoTextNoTermination;
+               if (suffixIs(info.mathcommand, '}'))
+                       info.flags |= CharInfoMathNoTermination;
                while (!flags.empty()) {
                        string flag;
                        flags = split(flags, flag, ',');
-                       if (flag == "combining")
-                               info.combining = true;
-                       else if (flag == "force")
-                               info.force = true;
-                       else
+                       if (flag == "combining") {
+                               info.flags |= CharInfoCombining;
+                       } else if (flag == "force") {
+                               info.flags |= CharInfoForce;
+                               forced.insert(symbol);
+                       } else if (flag == "mathalpha") {
+                               mathalpha.insert(symbol);
+                       } else if (flag == "notermination=text") {
+                               info.flags |= CharInfoTextNoTermination;
+                       } else if (flag == "notermination=math") {
+                               info.flags |= CharInfoMathNoTermination;
+                       } else if (flag == "notermination=both") {
+                               info.flags |= CharInfoTextNoTermination;
+                               info.flags |= CharInfoMathNoTermination;
+                       } else if (flag == "notermination=none") {
+                               info.flags &= ~CharInfoTextNoTermination;
+                               info.flags &= ~CharInfoMathNoTermination;
+                       } else if (contains(flag, "tipashortcut=")) {
+                               info.tipashortcut = split(flag, '=');
+                       } else {
                                lyxerr << "Ignoring unknown flag `" << flag
                                       << "' for symbol `0x"
                                       << hex << symbol << dec
                                       << "'." << endl;
+                       }
                }
+               // mathcommand and mathpreamble have been added for 1.6.0.
+               // make them optional so that old files still work.
+               int const lineno = symbolslex.lineNumber();
+               bool breakout = false;
+               if (symbolslex.next(true)) {
+                       if (symbolslex.lineNumber() != lineno) {
+                               // line in old format without mathcommand and mathpreamble
+                               getNextToken = false;
+                       } else {
+                               info.mathcommand = symbolslex.getDocString();
+                               if (symbolslex.next(true)) {
+                                       if (symbolslex.lineNumber() != lineno) {
+                                               // line in new format with mathcommand only
+                                               getNextToken = false;
+                                       } else {
+                                               // line in new format with mathcommand and mathpreamble
+                                               info.mathpreamble = symbolslex.getString();
+                                       }
+                               } else
+                                       breakout = true;
+                       }
+               } else {
+                       breakout = true;
+               }
+
+               // backward compatibility
+               if (info.mathpreamble == "esintoramsmath")
+                       info.mathpreamble = "esint|amsmath";
 
-               if (!info.preamble.empty())
-                       info.feature = info.preamble[0] != '\\';
+               if (!info.textpreamble.empty())
+                       if (info.textpreamble[0] != '\\')
+                               info.flags |= CharInfoTextFeature;
+               if (!info.mathpreamble.empty())
+                       if (info.mathpreamble[0] != '\\')
+                               info.flags |= CharInfoMathFeature;
 
                LYXERR(Debug::INFO, "Read unicode symbol " << symbol << " '"
-                       << to_utf8(info.command) << "' '" << info.preamble
-                       << "' " << info.combining << ' ' << info.feature);
-               unicodesymbols[symbol] = info;
+                       << to_utf8(info.textcommand) << "' '" << info.textpreamble
+                       << " '" << info.textfeature() << ' ' << info.textnotermination()
+                       << ' ' << to_utf8(info.mathcommand) << "' '" << info.mathpreamble
+                       << "' " << info.mathfeature() << ' ' << info.mathnotermination()
+                       << ' ' << info.combining() << ' ' << info.force());
+
+               // we assume that at least one command is nonempty when using unicodesymbols
+               if (!info.textcommand.empty() || !info.mathcommand.empty())
+                       unicodesymbols[symbol] = info;
+
+               if (breakout)
+                       break;
        }
 
        // Now read the encodings
-       enum Encodingtags {
+       enum {
                et_encoding = 1,
-               et_end,
-               et_last
+               et_end
        };
 
-       struct keyword_item encodingtags[et_last - 1] = {
+       LexerKeyword encodingtags[] = {
                { "encoding", et_encoding },
                { "end", et_end }
        };
 
-       Lexer lex(encodingtags, et_last - 1);
+       Lexer lex(encodingtags);
        lex.setFile(encfile);
+       lex.setContext("Encodings::read");
        while (lex.isOK()) {
                switch (lex.lex()) {
                case et_encoding:
@@ -549,50 +1007,54 @@ void Encodings::read(FileName const & encfile, FileName const & symbolsfile)
                        lex.next();
                        string const latexname = lex.getString();
                        lex.next();
+                       string const guiname = lex.getString();
+                       lex.next();
                        string const iconvname = lex.getString();
                        lex.next();
                        string const width = lex.getString();
                        bool fixedwidth = false;
+                       bool unsafe = false;
                        if (width == "fixed")
                                fixedwidth = true;
                        else if (width == "variable")
                                fixedwidth = false;
-                       else {
-                               lex.printError("Encodings::read: "
-                                              "Unknown width: `$$Token'");
-                        }
-                        
+                       else if (width == "variableunsafe") {
+                               fixedwidth = false;
+                               unsafe = true;
+                       }
+                       else
+                               lex.printError("Unknown width");
+
                        lex.next();
                        string const p = lex.getString();
                        Encoding::Package package = Encoding::none;
                        if (p == "none")
-                                package = Encoding::none;
+                               package = Encoding::none;
                        else if (p == "inputenc")
                                package = Encoding::inputenc;
                        else if (p == "CJK")
                                package = Encoding::CJK;
-                       else {
-                               lex.printError("Encodings::read: "
-                                              "Unknown package: `$$Token'");
-                        }
-                        
+                       else if (p == "japanese")
+                               package = Encoding::japanese;
+                       else
+                               lex.printError("Unknown package");
+
                        LYXERR(Debug::INFO, "Reading encoding " << name);
                        encodinglist[name] = Encoding(name, latexname,
-                                                     iconvname, fixedwidth,
-                                                     package);
+                               guiname, iconvname, fixedwidth, unsafe,
+                               package);
+
                        if (lex.lex() != et_end)
-                               lex.printError("Encodings::read: "
-                                              "missing end");
+                               lex.printError("Missing end");
                        break;
                }
                case et_end:
-                       lex.printError("Encodings::read: Misplaced end");
+                       lex.printError("Misplaced end");
                        break;
                case Lexer::LEX_FEOF:
                        break;
                default:
-                       lex.printError("Encodings::read: "
-                                      "Unknown tag: `$$Token'");
+                       lex.printError("Unknown tag");
                        break;
                }
        }