]> git.lyx.org Git - lyx.git/blobdiff - src/Encoding.cpp
Natbib authoryear uses (Ref1; Ref2) by default.
[lyx.git] / src / Encoding.cpp
index e75fe3ede7427bed321aeb13bfeb66edeb5166b4..ff83ab8c139a972f2392b399043e08a717947447 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>
@@ -32,8 +37,14 @@ using namespace lyx::support;
 
 namespace lyx {
 
+int const Encoding::any = -1;
+
 Encodings encodings;
 
+Encodings::MathCommandSet Encodings::mathcmd;
+Encodings::TextCommandSet Encodings::textcmd;
+Encodings::MathSymbolSet  Encodings::mathsym;
+
 namespace {
 
 char_type arabic_table[172][4] = {
@@ -134,7 +145,7 @@ char_type arabic_table[172][4] = {
        {0, 0, 0, 0}, // 0x067b
        {0, 0, 0, 0}, // 0x067c
        {0, 0, 0, 0}, // 0x067d
-       {0xfb56, 0xfb57, 0xfb58, 0xfb59}, // 0x067e = peh 
+       {0xfb56, 0xfb57, 0xfb58, 0xfb59}, // 0x067e = peh
        {0, 0, 0, 0}, // 0x067f
        {0, 0, 0, 0}, // 0x0680
        {0, 0, 0, 0}, // 0x0681
@@ -142,7 +153,7 @@ char_type arabic_table[172][4] = {
        {0, 0, 0, 0}, // 0x0683
        {0, 0, 0, 0}, // 0x0684
        {0, 0, 0, 0}, // 0x0685
-       {0xfb7a, 0xfb7b, 0xfb7c, 0xfb7d}, // 0x0686 = tcheh 
+       {0xfb7a, 0xfb7b, 0xfb7c, 0xfb7d}, // 0x0686 = tcheh
        {0, 0, 0, 0}, // 0x0687
        {0, 0, 0, 0}, // 0x0688
        {0, 0, 0, 0}, // 0x0689
@@ -177,13 +188,13 @@ char_type arabic_table[172][4] = {
        {0, 0, 0, 0}, // 0x06a6
        {0, 0, 0, 0}, // 0x06a7
        {0, 0, 0, 0}, // 0x06a8
-       {0xfb8e, 0xfb8f, 0xfb90, 0xfb91}, // 0x06a9 = farsi kaf 
+       {0xfb8e, 0xfb8f, 0xfb90, 0xfb91}, // 0x06a9 = farsi kaf
        {0, 0, 0, 0}, // 0x06aa
        {0, 0, 0, 0}, // 0x06ab
        {0, 0, 0, 0}, // 0x06ac
        {0, 0, 0, 0}, // 0x06ad
        {0, 0, 0, 0}, // 0x06ae
-       {0xfb92, 0xfb93, 0xfb94, 0xfb95}, // 0x06af = gaf 
+       {0xfb92, 0xfb93, 0xfb94, 0xfb95}, // 0x06af = gaf
        {0, 0, 0, 0}, // 0x06b0
        {0, 0, 0, 0}, // 0x06b1
        {0, 0, 0, 0}, // 0x06b2
@@ -212,7 +223,7 @@ char_type arabic_table[172][4] = {
        {0, 0, 0, 0}, // 0x06c9
        {0, 0, 0, 0}, // 0x06ca
        {0, 0, 0, 0}, // 0x06cb
-       {0xfbfc, 0xfbfd, 0xfbfe, 0xfbff} // 0x06cc = farsi yeh  
+       {0xfbfc, 0xfbfd, 0xfbfe, 0xfbff} // 0x06cc = farsi yeh
 };
 
 
@@ -220,6 +231,23 @@ 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,
+       ///
+       CharInfoForceSelected = 64,
+};
+
 /// Information about a single UCS4 character
 struct CharInfo {
        /// LaTeX command (text mode) for this character
@@ -231,22 +259,40 @@ struct CharInfo {
        /// Needed LaTeX preamble (or feature) for math mode
        string mathpreamble;
        /// Is this a combining character?
-       bool combining;
+       bool combining() const { return flags & CharInfoCombining ? true : false; }
        /// Is \c textpreamble a feature known by LaTeXFeatures, or a raw LaTeX
        /// command?
-       bool textfeature;
+       bool textfeature() const { return flags & CharInfoTextFeature ? true : false; }
        /// Is \c mathpreamble a feature known by LaTeXFeatures, or a raw LaTeX
        /// command?
-       bool mathfeature;
+       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; }
+       /// Force the LaTeX command for some encodings?
+       bool forceselected() const { return flags & CharInfoForceSelected ? 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;
+typedef std::map<string, CharSet> CharSetMap;
+CharSet forced;
+CharSetMap forcedselected;
+
+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;
@@ -266,9 +312,10 @@ 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), forced_(&forcedselected[n]), package_(p)
 {
        if (n == "ascii") {
                // ASCII can encode 128 code points and nothing else
@@ -279,6 +326,7 @@ Encoding::Encoding(string const & n, string const & l, string const & i,
                start_encodable_ = max_ucs4;
                complete_ = true;
        } else {
+               start_encodable_ = 0;
                complete_ = false;
        }
 }
@@ -302,8 +350,12 @@ 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())
                                encodable_.insert(uc);
+                       else if (!it->second.force()) {
+                               if (forced_->empty() || forced_->find(uc) == forced_->end())
+                                       encodable_.insert(uc);
+                       }
                }
        } else {
                // We do not know how many code points this encoding has, and
@@ -314,8 +366,12 @@ 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())
                                        encodable_.insert(c);
+                               else if (!it->second.force()) {
+                                       if (forced_->empty() || forced_->find(c) == forced_->end())
+                                               encodable_.insert(c);
+                               }
                        }
                }
        }
@@ -330,15 +386,33 @@ void Encoding::init() const
 }
 
 
-docstring Encoding::latexChar(char_type c) const
+bool Encoding::isForced(char_type c) const
+{
+       if (!forced.empty() && forced.find(c) != forced.end())
+               return true;
+       return !forced_->empty() && forced_->find(c) != forced_->end();
+}
+
+
+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_ && !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 (or should not) be encoded in this encoding
        CharInfoMap::const_iterator const it = unicodesymbols.find(c);
@@ -346,8 +420,47 @@ docstring Encoding::latexChar(char_type c) const
                throw EncodingException(c);
        // at least one of mathcommand and textcommand is nonempty
        if (it->second.textcommand.empty())
-               return "\\ensuremath{" + it->second.mathcommand + '}';
-       return it->second.textcommand;
+               return make_pair(
+                       "\\ensuremath{" + it->second.mathcommand + '}', false);
+       return make_pair(it->second.textcommand, !it->second.textnotermination());
+}
+
+
+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);
 }
 
 
@@ -370,49 +483,104 @@ vector<char_type> Encoding::symbolsList() const
 }
 
 
-bool Encodings::latexMathChar(char_type c, docstring & command)
+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())
-               throw EncodingException(c);
-       if (it->second.mathcommand.empty()) {
-               if (it->second.textcommand.empty())
+       if (it == unicodesymbols.end()) {
+               if (!encoding || command.empty())
                        throw EncodingException(c);
-               command = it->second.textcommand;
+               if (mathmode)
+                       addMathSym(c);
                return false;
        }
-       command = it->second.mathcommand;
-       return true;
+       // 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, bool & combining)
+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 (; it != end; ++it) {
+       for (combining = false; it != end; ++it) {
                docstring const math = it->second.mathcommand;
                docstring const text = it->second.textcommand;
-               if (math == cmd || text == cmd) {
-                       combining = it->second.combining;
+               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, docstring & rem)
+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();
+       size_t prefix = 0;
        CharInfoMap::const_iterator const uniend = unicodesymbols.end();
-       for (size_t j = 0; j < cmdend; ++j) {
+       for (size_t i = 0, j = 0; j < cmdend; ++j) {
                // Also get the char after a backslash
-               if (j + 1 < cmdend && cmd[j] == '\\')
+               if (j + 1 < cmdend && cmd[j] == '\\') {
                        ++j;
+                       prefix = 1;
+                       // Detect things like \=*{e} as well
+                       if (j + 3 < cmdend && cmd[j+1] == '*' &&
+                           cmd[j+2] == '{') {
+                               ++j;
+                               prefix = 2;
+                       }
+               }
+               // position of the last character before a possible macro
+               // argument
+               size_t m = j;
                // If a macro argument follows, get it, too
+               // Do it here only for single character commands. Other
+               // combining commands need this too, but they are handled in
+               // the loop below for performance reasons.
                if (j + 1 < cmdend && cmd[j + 1] == '{') {
                        size_t k = j + 1;
                        int count = 1;
@@ -425,17 +593,29 @@ docstring Encodings::fromLaTeXCommand(docstring const & cmd, docstring & rem)
                        }
                        if (k != docstring::npos)
                                j = k;
+               } else if (m + 1 < cmdend && isAlphaASCII(cmd[m])) {
+                       while (m + 2 < cmdend && isAlphaASCII(cmd[m+1]))
+                               m++;
                }
                // 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);
+               docstring subcmd = cmd.substr(i, j - i + 1);
 
                CharInfoMap::const_iterator it = unicodesymbols.begin();
+               // First part of subcmd which might be a combining character
+               docstring combcmd = (m == j) ? docstring() : cmd.substr(i, m - i + 1);
+               // The combining character of combcmd if it exists
+               CharInfoMap::const_iterator combining = uniend;
                size_t unicmd_size = 0;
-               char_type c;
+               char_type c = 0;
                for (; it != uniend; ++it) {
-                       docstring const math = it->second.mathcommand;
-                       docstring const text = it->second.textcommand;
+                       docstring const math = mathmode ? it->second.mathcommand
+                                                       : docstring();
+                       docstring const text = textmode ? it->second.textcommand
+                                                       : docstring();
+                       if (!combcmd.empty() && it->second.combining() &&
+                           (math == combcmd || text == combcmd))
+                               combining = it;
                        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
@@ -461,51 +641,204 @@ docstring Encodings::fromLaTeXCommand(docstring const & cmd, docstring & rem)
                                tmp.resize(tmp.size() - 1);
 
                        // If this is an exact match, we found a (longer)
-                       // matching command in the unicodesymbols file
-                       if (math == tmp || text == tmp) {
+                       // matching entry in the unicodesymbols file.
+                       if (math != tmp && text != tmp)
+                               continue;
+                       // If we found a combining command, we need to append
+                       // the macro argument if this has not been done above.
+                       if (tmp == combcmd && combining != uniend &&
+                           k < cmdend && cmd[k] == '{') {
+                               size_t l = k;
+                               int count = 1;
+                               while (l < cmdend && count && l != docstring::npos) {
+                                       l = cmd.find_first_of(from_ascii("{}"), l + 1);
+                                       if (cmd[l] == '{')
+                                               ++count;
+                                       else
+                                               --count;
+                               }
+                               if (l != docstring::npos) {
+                                       j = l;
+                                       subcmd = cmd.substr(i, j - i + 1);
+                               }
+                       }
+                       // 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 }.
+                       else if (tmp[0] != '\\'
+                                  || (tmp.size() == prefix + 1 &&
+                                      !isAlphaASCII(tmp[1]) &&
+                                      (prefix == 1 || !isAlphaASCII(tmp[2])))
+                                  || 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)
+               else if (combining != uniend &&
+                        prefixIs(subcmd, combcmd + '{')) {
+                       // We know that subcmd starts with combcmd and
+                       // contains an argument in braces.
+                       docstring const arg = subcmd.substr(
+                               combcmd.length() + 1,
+                               subcmd.length() - combcmd.length() - 2);
+                       // If arg is a single character we can construct a
+                       // combining sequence.
+                       char_type a;
+                       bool argcomb = false;
+                       if (arg.size() == 1 && isAlnumASCII(arg[0]))
+                               a = arg[0];
+                       else {
+                               // Use the version of fromLaTeXCommand() that
+                               // parses only one command, since we cannot
+                               // use more than one character.
+                               bool dummy = false;
+                               set<string> r;
+                               a = fromLaTeXCommand(arg, cmdtype, argcomb,
+                                                    dummy, &r);
+                               if (a && req && !argcomb)
+                                       req->insert(r.begin(), r.end());
+                       }
+                       if (a && !argcomb) {
+                               // In unicode the combining character comes
+                               // after its base
+                               symbols += a;
+                               symbols += combining->first;
+                               i = j + 1;
+                               unicmd_size = 2;
+                       }
+               }
+               if (j + 1 == cmdend && !unicmd_size) {
                        // 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::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()) {
-               // at least one of mathcommand and textcommand is nonempty
-               bool const use_math = (for_mathed && !it->second.mathcommand.empty()) ||
+               // 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());
-               if (use_math) {
+               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)
-                                       features.require(it->second.mathpreamble);
-                               else
+                               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);
                        }
-               } else {
+               }
+               // with utf8-plain, we do not load packages (see #7766)
+               if (use_text && !plain_utf8) {
                        if (!it->second.textpreamble.empty()) {
-                               if (it->second.textfeature)
-                                       features.require(it->second.textpreamble);
-                               else
+                               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) {
-                               features.require("relsize");
-                               features.require("lyxmathsym");
-                       }
                }
        }
+       if (for_mathed && isMathSym(c)) {
+               features.require("amstext");
+               features.require("lyxmathsym");
+       }
+#endif
 }
 
 
@@ -550,11 +883,20 @@ 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);
@@ -573,15 +915,31 @@ bool Encodings::isKnownScriptChar(char_type const c, string & preamble)
 }
 
 
-Encoding const * Encodings::fromLyXName(string const & name) const
+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::fromLaTeXName(string const & name) const
+Encoding const *
+Encodings::fromLaTeXName(string const & n, int const & p, 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.
@@ -589,21 +947,34 @@ Encoding const * Encodings::fromLaTeXName(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) && (it->second.package() & p)
+                               && (!it->second.unsafe() || allowUnsafe))
                        return &it->second;
        return 0;
 }
 
 
-Encodings::Encodings()
+Encoding const *
+Encodings::fromIconvName(string const & n, int const & p, bool allowUnsafe) const
 {
+       EncodingList::const_iterator const end = encodinglist.end();
+       for (EncodingList::const_iterator it = encodinglist.begin(); it != end; ++it)
+               if ((it->second.iconvName() == n) && (it->second.package() & p)
+                               && (!it->second.unsafe() || allowUnsafe))
+                       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.
+       CharSetMap forcednotselected;
        Lexer symbolslex;
        symbolslex.setFile(symbolsfile);
        bool getNextToken = true;
@@ -636,21 +1007,51 @@ void Encodings::read(FileName const & encfile, FileName const & symbolsfile)
                        break;
                flags = symbolslex.getString();
 
-               info.combining = false;
-               info.textfeature = 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 (prefixIs(flag, "force=")) {
+                               vector<string> encodings =
+                                       getVectorFromString(flag.substr(6), ";");
+                               for (size_t i = 0; i < encodings.size(); ++i)
+                                       forcedselected[encodings[i]].insert(symbol);
+                               info.flags |= CharInfoForceSelected;
+                       } else if (prefixIs(flag, "force!=")) {
+                               vector<string> encodings =
+                                       getVectorFromString(flag.substr(7), ";");
+                               for (size_t i = 0; i < encodings.size(); ++i)
+                                       forcednotselected[encodings[i]].insert(symbol);
+                               info.flags |= CharInfoForceSelected;
+                       } 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.
@@ -677,16 +1078,24 @@ void Encodings::read(FileName const & encfile, FileName const & symbolsfile)
                        breakout = true;
                }
 
+               // backward compatibility
+               if (info.mathpreamble == "esintoramsmath")
+                       info.mathpreamble = "esint|amsmath";
+
                if (!info.textpreamble.empty())
-                       info.textfeature = info.textpreamble[0] != '\\';
+                       if (info.textpreamble[0] != '\\')
+                               info.flags |= CharInfoTextFeature;
                if (!info.mathpreamble.empty())
-                       info.mathfeature = info.mathpreamble[0] != '\\';
+                       if (info.mathpreamble[0] != '\\')
+                               info.flags |= CharInfoMathFeature;
 
                LYXERR(Debug::INFO, "Read unicode symbol " << symbol << " '"
                        << to_utf8(info.textcommand) << "' '" << info.textpreamble
-                       << "' " << info.combining << ' ' << info.textfeature
-                       << " '" << to_utf8(info.mathcommand) << "' '"
-                       << info.mathpreamble << "' " << info.mathfeature);
+                       << " '" << info.textfeature() << ' ' << info.textnotermination()
+                       << ' ' << to_utf8(info.mathcommand) << "' '" << info.mathpreamble
+                       << "' " << info.mathfeature() << ' ' << info.mathnotermination()
+                       << ' ' << info.combining() << ' ' << info.force()
+                       << ' ' << info.forceselected());
 
                // we assume that at least one command is nonempty when using unicodesymbols
                if (!info.textcommand.empty() || !info.mathcommand.empty())
@@ -699,7 +1108,7 @@ void Encodings::read(FileName const & encfile, FileName const & symbolsfile)
        // Now read the encodings
        enum {
                et_encoding = 1,
-               et_end,
+               et_end
        };
 
        LexerKeyword encodingtags[] = {
@@ -719,14 +1128,21 @@ 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 if (width == "variableunsafe") {
+                               fixedwidth = false;
+                               unsafe = true;
+                       }
                        else
                                lex.printError("Unknown width");
 
@@ -739,12 +1155,15 @@ void Encodings::read(FileName const & encfile, FileName const & symbolsfile)
                                package = Encoding::inputenc;
                        else if (p == "CJK")
                                package = Encoding::CJK;
+                       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("Missing end");
@@ -760,6 +1179,15 @@ void Encodings::read(FileName const & encfile, FileName const & symbolsfile)
                        break;
                }
        }
+
+       // Move all information from forcednotselected to forcedselected
+       for (CharSetMap::const_iterator it1 = forcednotselected.begin(); it1 != forcednotselected.end(); ++it1) {
+               for (CharSetMap::iterator it2 = forcedselected.begin(); it2 != forcedselected.end(); ++it2) {
+                       if (it2->first != it1->first)
+                               it2->second.insert(it1->second.begin(), it1->second.end());
+               }
+       }
+
 }