mirror of
https://git.lyx.org/repos/lyx.git
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1189 lines
33 KiB
C++
1189 lines
33 KiB
C++
/**
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* \file Encoding.cpp
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* This file is part of LyX, the document processor.
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* Licence details can be found in the file COPYING.
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*
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* \author Lars Gullik Bjønnes
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* \author Jean-Marc Lasgouttes
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* \author Dekel Tsur
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*
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* Full author contact details are available in file CREDITS.
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*/
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#include <config.h>
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#include "Encoding.h"
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#include "support/debug.h"
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#include "support/docstring.h"
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#include "support/gettext.h"
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#include "support/Lexer.h"
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#include "support/lstrings.h"
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#include "support/mutex.h"
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#include "support/textutils.h"
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#include "support/unicode.h"
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#include <algorithm>
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#include <cstdint>
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#include <iterator>
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#include <regex>
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#include <sstream>
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using namespace std;
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using namespace lyx::support;
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namespace lyx {
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int const Encoding::any = -1;
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Encodings encodings;
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Encodings::MathCommandSet Encodings::mathcmd;
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Encodings::TextCommandSet Encodings::textcmd;
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Encodings::MathSymbolSet Encodings::mathsym;
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namespace {
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typedef map<char_type, CharInfo> CharInfoMap;
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CharInfoMap unicodesymbols;
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typedef set<char_type> CharSet;
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typedef map<string, CharSet> CharSetMap;
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CharSet forced;
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CharSetMap forcedSelected;
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typedef set<char_type> MathAlphaSet;
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MathAlphaSet mathalpha;
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/// The highest code point in UCS4 encoding (1<<20 + 1<<16)
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char_type const max_ucs4 = 0x110000;
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} // namespace
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EncodingException::EncodingException(char_type c)
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: failed_char(c), par_id(0), pos(0)
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{
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}
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const char * EncodingException::what() const noexcept
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{
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return "Could not find LaTeX command for a character";
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}
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CharInfo::CharInfo(
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docstring const & text_command, docstring const & math_command,
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std::string const & text_preamble, std::string const & math_preamble,
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std::string const & tipa_shortcut, unsigned int flags)
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: text_commands_({text_command}), math_commands_({math_command}),
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text_preamble_(text_preamble), math_preamble_(math_preamble),
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tipa_shortcut_(tipa_shortcut), flags_(flags)
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{
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}
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CharInfo::CharInfo(
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std::vector<docstring> const & text_commands, std::vector<docstring> const & math_commands,
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std::string const & text_preamble, std::string const & math_preamble,
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std::string const & tipa_shortcut, unsigned int flags)
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: text_commands_(text_commands), math_commands_(math_commands),
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text_preamble_(text_preamble), math_preamble_(math_preamble),
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tipa_shortcut_(tipa_shortcut), flags_(flags)
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{
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}
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Encoding::Encoding(string const & n, string const & l, string const & g,
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string const & i, bool f, bool u, Encoding::Package p)
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: name_(n), latexName_(l), guiName_(g), iconvName_(i), fixedwidth_(f),
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unsafe_(u), forced_(&forcedSelected[n]), package_(p)
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{
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if (n == "ascii") {
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// ASCII can encode 128 code points and nothing else
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start_encodable_ = 128;
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complete_ = true;
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} else if (i == "UTF-8") {
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// UTF8 can encode all UCS4 code points
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start_encodable_ = max_ucs4;
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complete_ = true;
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} else {
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start_encodable_ = 0;
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complete_ = false;
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}
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}
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void Encoding::init() const
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{
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// Since the the constructor is the only method which sets complete_
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// to false the test for complete_ is thread-safe without mutex.
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if (complete_)
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return;
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static Mutex mutex;
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Mutex::Locker lock(&mutex);
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// We need to test again for complete_, since another thread could
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// have set it to true while we were waiting for the lock and we must
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// not modify an encoding which is already complete.
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if (complete_)
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return;
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// We do not make any member mutable so that it can be easily verified
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// that all const methods are thread-safe: init() is the only const
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// method which changes complete_, encodable_ and start_encodable_, and
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// it uses a mutex to ensure thread-safety.
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CharSet & encodable = const_cast<Encoding *>(this)->encodable_;
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char_type & start_encodable = const_cast<Encoding *>(this)->start_encodable_;
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start_encodable = 0;
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// temporarily switch off lyxerr, since we will generate iconv errors
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lyxerr.disable();
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if (fixedwidth_) {
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// We do not need to check all UCS4 code points, it is enough
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// if we check all 256 code points of this encoding.
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for (unsigned short j = 0; j < 256; ++j) {
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char const c = char(j);
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vector<char_type> const ucs4 = eightbit_to_ucs4(&c, 1, iconvName_);
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if (ucs4.size() != 1)
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continue;
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char_type const uc = ucs4[0];
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CharInfoMap::const_iterator const it = unicodesymbols.find(uc);
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if (it == unicodesymbols.end())
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encodable.insert(uc);
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else if (!it->second.force()) {
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if (forced_->empty() || forced_->find(uc) == forced_->end())
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encodable.insert(uc);
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}
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}
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} else {
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// We do not know how many code points this encoding has, and
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// they do not have a direct representation as a single byte,
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// therefore we need to check all UCS4 code points.
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// This is expensive!
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for (char_type c = 0; c < max_ucs4; ++c) {
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vector<char> const eightbit = ucs4_to_eightbit(&c, 1, iconvName_);
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if (!eightbit.empty()) {
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CharInfoMap::const_iterator const it = unicodesymbols.find(c);
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if (it == unicodesymbols.end())
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encodable.insert(c);
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else if (!it->second.force()) {
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if (forced_->empty() || forced_->find(c) == forced_->end())
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encodable.insert(c);
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}
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}
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}
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}
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lyxerr.enable();
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CharSet::iterator it = encodable.find(start_encodable);
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while (it != encodable.end()) {
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encodable.erase(it);
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++start_encodable;
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it = encodable.find(start_encodable);
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}
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const_cast<Encoding *>(this)->complete_ = true;
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}
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bool Encoding::isForced(char_type c) const
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{
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if (!forced.empty() && forced.find(c) != forced.end())
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return true;
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return !forced_->empty() && forced_->find(c) != forced_->end();
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}
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bool Encoding::encodable(char_type c) const
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{
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// assure the used encoding is properly initialized
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init();
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if (iconvName_ == "UTF-8" && package_ == none)
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return true;
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// platex does not load inputenc: force conversion of supported characters
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if (package_ == Encoding::japanese
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&& ((0xb7 <= c && c <= 0x05ff) // Latin-1 Supplement ... Hebrew
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|| (0x1d00 <= c && c <= 0x218f) // Phonetic Extensions ... Number Forms
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|| (0x2193 <= c && c <= 0x2aff) // Arrows ... Supplemental Mathematical Operators
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|| (0xfb00 <= c && c <= 0xfb4f) // Alphabetic Presentation Forms
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|| (0x1d400 <= c && c <= 0x1d7ff))) // Mathematical Alphanumeric Symbols
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return false;
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if (c < start_encodable_ && !isForced(c))
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return true;
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if (encodable_.find(c) != encodable_.end())
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return true;
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return false;
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}
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pair<docstring, bool> Encoding::latexChar(char_type c) const
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{
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if (encodable(c))
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return make_pair(docstring(1, c), false);
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// c cannot (or should not) be encoded in this encoding
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CharInfoMap::const_iterator const it = unicodesymbols.find(c);
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if (it == unicodesymbols.end())
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throw EncodingException(c);
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// at least one of mathCommand and textCommand is nonempty
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if (it->second.textCommand().empty())
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return make_pair(
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"\\ensuremath{" + it->second.mathCommand() + '}', false);
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return make_pair(it->second.textCommand(), !it->second.textNoTermination());
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}
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pair<docstring, docstring> Encoding::latexString(docstring const & input, bool dryrun) const
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{
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docstring result;
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docstring uncodable;
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bool terminate = false;
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for (char_type const c : input) {
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try {
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pair<docstring, bool> latex_char = latexChar(c);
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docstring const latex = latex_char.first;
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if (terminate && !prefixIs(latex, '\\')
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&& !prefixIs(latex, '{')
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&& !prefixIs(latex, '}')) {
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// Prevent eating of a following
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// space or command corruption by
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// following characters
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if (latex == " ")
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result += "{}";
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else
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result += " ";
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}
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result += latex;
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terminate = latex_char.second;
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} catch (EncodingException & /* e */) {
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LYXERR0("Uncodable character <" << docstring(1, c)
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<< "> in latexString!");
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if (dryrun) {
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result += "<" + _("LyX Warning: ")
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+ _("uncodable character") + " '";
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result += docstring(1, c);
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result += "'>";
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} else
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uncodable += c;
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}
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}
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return make_pair(result, uncodable);
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}
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vector<char_type> Encoding::symbolsList() const
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{
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// assure the used encoding is properly initialized
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init();
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// first all those below start_encodable_
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vector<char_type> symbols;
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for (char_type c = 0; c < start_encodable_; ++c)
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symbols.push_back(c);
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// add all encodable characters
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copy(encodable_.begin(), encodable_.end(), back_inserter(symbols));
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// now the ones from the unicodesymbols file that are not already there
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for (auto const & elem : unicodesymbols) {
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if (find(symbols.begin(), symbols.end(), elem.first) == symbols.end())
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symbols.push_back(elem.first);
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}
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// finally, sort the vector
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sort(symbols.begin(), symbols.end());
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return symbols;
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}
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bool Encodings::latexMathChar(char_type c, bool mathmode,
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Encoding const * encoding, docstring & command,
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bool & needsTermination)
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{
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command = empty_docstring();
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if (encoding)
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if (encoding->encodable(c))
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command = docstring(1, c);
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needsTermination = false;
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CharInfoMap::const_iterator const it = unicodesymbols.find(c);
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if (it == unicodesymbols.end()) {
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if (!encoding || command.empty())
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throw EncodingException(c);
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if (mathmode)
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addMathSym(c);
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return false;
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}
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// at least one of mathCommand and textCommand is nonempty
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bool use_math = (mathmode && !it->second.mathCommand().empty()) ||
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(!mathmode && it->second.textCommand().empty());
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if (use_math) {
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command = it->second.mathCommand();
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needsTermination = !it->second.mathNoTermination();
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addMathCmd(c);
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} else {
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if (!encoding || command.empty()) {
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command = it->second.textCommand();
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needsTermination = !it->second.textNoTermination();
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}
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if (mathmode)
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addMathSym(c);
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else
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addTextCmd(c);
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}
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return use_math;
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}
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char_type Encodings::fromLaTeXCommand(docstring const & cmd, int cmdtype,
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bool & combining, bool & needsTermination, set<string> * req)
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{
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CharInfoMap::const_iterator const end = unicodesymbols.end();
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CharInfoMap::const_iterator it = unicodesymbols.begin();
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for (combining = false; it != end; ++it) {
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if (it->second.deprecated())
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continue;
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if (cmdtype & MATH_CMD) {
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for (const docstring& math : it->second.mathCommands()) {
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if ((cmdtype & MATH_CMD) && math == cmd) {
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combining = it->second.combining();
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needsTermination = !it->second.mathNoTermination();
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if (req && it->second.mathFeature() &&
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!it->second.mathPreamble().empty())
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req->insert(it->second.mathPreamble());
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return it->first;
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}
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}
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}
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if (cmdtype & TEXT_CMD) {
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for (const docstring& text : it->second.textCommands()) {
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if (text == cmd) {
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combining = it->second.combining();
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needsTermination = !it->second.textNoTermination();
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if (req && it->second.textFeature() &&
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!it->second.textPreamble().empty())
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req->insert(it->second.textPreamble());
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return it->first;
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}
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}
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}
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}
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needsTermination = false;
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return 0;
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}
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docstring Encodings::fromLaTeXCommand(docstring const & cmd, int cmdtype,
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bool & needsTermination, docstring & rem, set<string> * req)
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{
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needsTermination = false;
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rem = empty_docstring();
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bool const mathmode = cmdtype & MATH_CMD;
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bool const textmode = cmdtype & TEXT_CMD;
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// Easy case: the command is a complete entry of unicodesymbols.
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for (const auto & unicodeSymbol : unicodesymbols) {
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if (mathmode) {
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for (const auto & command : unicodeSymbol.second.mathCommands()) {
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if (command == cmd) {
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docstring value;
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value += unicodeSymbol.first;
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needsTermination = !unicodeSymbol.second.mathNoTermination();
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if (req && unicodeSymbol.second.mathFeature()
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&& !unicodeSymbol.second.mathPreamble().empty())
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req->insert(unicodeSymbol.second.mathPreamble());
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return value;
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}
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}
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}
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if (textmode) {
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for (const auto & command : unicodeSymbol.second.textCommands()) {
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if (command == cmd) {
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docstring value;
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value += unicodeSymbol.first;
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needsTermination = !unicodeSymbol.second.textNoTermination();
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if (req && unicodeSymbol.second.textFeature()
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&& !unicodeSymbol.second.textPreamble().empty())
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req->insert(unicodeSymbol.second.textPreamble());
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return value;
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}
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}
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}
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}
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// Otherwise, try to map as many commands as possible, matching prefixes of the command.
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docstring symbols;
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size_t const cmdend = cmd.size();
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size_t prefix = 0;
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CharInfoMap::const_iterator const uniend = unicodesymbols.end();
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for (size_t i = 0, j = 0; j < cmdend; ++j) {
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// Also get the char after a backslash
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if (j + 1 < cmdend && cmd[j] == '\\') {
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++j;
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prefix = 1;
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// Detect things like \=*{e} as well
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if (j + 3 < cmdend && cmd[j+1] == '*' &&
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cmd[j+2] == '{') {
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++j;
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prefix = 2;
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}
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}
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// position of the last character before a possible macro
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// argument
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size_t m = j;
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// If a macro argument follows, get it, too
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// Do it here only for single character commands. Other
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// combining commands need this too, but they are handled in
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// the loop below for performance reasons.
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if (j + 1 < cmdend && cmd[j + 1] == '{') {
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size_t k = j + 1;
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int count = 1;
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while (k < cmdend && count) {
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k = cmd.find_first_of(from_ascii("{}"), k + 1);
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// braces may not be balanced
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if (k == docstring::npos)
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break;
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if (cmd[k] == '{')
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++count;
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else
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--count;
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}
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if (k != docstring::npos)
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j = k;
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} else if (m + 1 < cmdend && isAlphaASCII(cmd[m])) {
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while (m + 2 < cmdend && isAlphaASCII(cmd[m+1]))
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m++;
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}
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// Start with this substring and try augmenting it when it is
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// the prefix of some command in the unicodesymbols file
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docstring subcmd = cmd.substr(i, j - i + 1);
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// First part of subcmd which might be a combining character
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docstring combcmd = (m == j) ? docstring() : cmd.substr(i, m - i + 1);
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// The combining character of combcmd if it exists
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size_t unicmd_size = 0;
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char_type c = 0;
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CharInfoMap::const_iterator it = unicodesymbols.begin();
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CharInfoMap::const_iterator combining = uniend;
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for (; it != uniend; ++it) {
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if (it->second.deprecated())
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continue;
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docstring const math = mathmode ? it->second.mathCommand()
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: docstring();
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docstring const text = textmode ? it->second.textCommand()
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: docstring();
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if (!combcmd.empty() && it->second.combining() &&
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(math == combcmd || text == combcmd))
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combining = it;
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size_t cur_size = max(math.size(), text.size());
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// The current math or text unicode command cannot
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// match, or we already matched a longer one
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if (cur_size < subcmd.size() || cur_size <= unicmd_size)
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continue;
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docstring tmp = subcmd;
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size_t k = j;
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while (prefixIs(math, tmp) || prefixIs(text, tmp)) {
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++k;
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if (k >= cmdend || cur_size <= tmp.size())
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break;
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tmp += cmd[k];
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}
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// No match
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if (k == j)
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continue;
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// The last added char caused a mismatch, because
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// we didn't exhaust the chars in cmd and didn't
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// exceed the maximum size of the current unicmd
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if (k < cmdend && cur_size > tmp.size())
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tmp.resize(tmp.size() - 1);
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// If this is an exact match, we found a (longer)
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// 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 = cmd.find_first_of(from_ascii("{}"), l + 1);
|
|
// braces may not be balanced
|
|
if (l == docstring::npos)
|
|
break;
|
|
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 (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;
|
|
}
|
|
|
|
|
|
/// text macros we can convert beyond unicodesymbols
|
|
char const * const known_text_macros[] = {"LyX", "TeX", "LaTeXe", "LaTeX", ""};
|
|
char const * const known_text_macros_out[] = {"LyX", "TeX", "LaTeX2e", "LaTeX", ""};
|
|
|
|
|
|
docstring Encodings::convertLaTeXCommands(docstring const & str, bool const literal_math)
|
|
{
|
|
docstring val = str;
|
|
docstring ret;
|
|
docstring mret;
|
|
docstring cret;
|
|
|
|
bool scanning_cmd = false;
|
|
bool scanning_math = false;
|
|
bool is_section = false;
|
|
bool escaped = false; // used to catch \$, etc.
|
|
bool skip_space = false;
|
|
while (!val.empty()) {
|
|
char_type const ch = val[0];
|
|
|
|
// if we're scanning math, we collect everything until we
|
|
// find an unescaped $, and then try to convert this piecewise.
|
|
if (scanning_math) {
|
|
if (literal_math) {
|
|
// with xhtml, we output everything until we
|
|
// find an unescaped $, at which point we break out.
|
|
if (escaped)
|
|
escaped = false;
|
|
else if (ch == '\\')
|
|
escaped = true;
|
|
else if (ch == '$')
|
|
scanning_math = false;
|
|
ret += ch;
|
|
val = val.substr(1);
|
|
continue;
|
|
}
|
|
|
|
if (escaped)
|
|
escaped = false;
|
|
else if (ch == '\\')
|
|
escaped = true;
|
|
else if (ch == '$') {
|
|
scanning_math = false;
|
|
bool termination;
|
|
docstring rem;
|
|
ret += fromLaTeXCommand(mret, MATH_CMD, termination, rem);
|
|
// parse remaining math
|
|
while (!rem.empty()) {
|
|
docstring rrem;
|
|
// split command from normal text
|
|
docstring cmd = split(rem, rrem, '\\');
|
|
ret += rrem;
|
|
// done of no command was found
|
|
if (cmd.empty())
|
|
break;
|
|
// go on ...
|
|
docstring oldrem = rem;
|
|
ret += fromLaTeXCommand(from_ascii("\\") + cmd, MATH_CMD, termination, rem);
|
|
if (oldrem == rem) {
|
|
// Result unchanged, output
|
|
ret += rem;
|
|
break;
|
|
}
|
|
}
|
|
mret = docstring();
|
|
}
|
|
mret += ch;
|
|
val = val.substr(1);
|
|
continue;
|
|
}
|
|
|
|
// if we're scanning a command name, then we just
|
|
// discard characters until we hit something that
|
|
// isn't alpha.
|
|
if (scanning_cmd) {
|
|
if (!is_section && ch == 'S') {
|
|
is_section = true;
|
|
val = val.substr(1);
|
|
continue;
|
|
}
|
|
if (isAlphaASCII(ch)) {
|
|
cret += ch;
|
|
is_section = false;
|
|
val = val.substr(1);
|
|
escaped = false;
|
|
continue;
|
|
} else if (is_section) {
|
|
ret.push_back(0x00a7);
|
|
is_section = false;
|
|
continue;
|
|
}
|
|
// so we're done with this command.
|
|
// now we fall through and check this character.
|
|
is_section = false;
|
|
scanning_cmd = false;
|
|
}
|
|
|
|
// check if it's a know text macro
|
|
// If so, output and skip the following space
|
|
if (!cret.empty()) {
|
|
int const n = findToken(known_text_macros, to_ascii(cret));
|
|
if (n != -1) {
|
|
ret += known_text_macros_out[n];
|
|
skip_space = true;
|
|
}
|
|
cret.clear();
|
|
}
|
|
|
|
// was the last character a \? If so, then this is something like:
|
|
// \\ or \$, so we'll just output it. That's probably not always right...
|
|
if (escaped) {
|
|
// exception: output \, as THIN SPACE
|
|
if (ch == ',')
|
|
ret.push_back(0x2009);
|
|
else
|
|
ret += ch;
|
|
val = val.substr(1);
|
|
escaped = false;
|
|
continue;
|
|
}
|
|
|
|
if (ch == '~') {
|
|
ret += char_type(0x00a0);
|
|
val = val.substr(1);
|
|
continue;
|
|
}
|
|
|
|
if (ch == '$') {
|
|
val = val.substr(1);
|
|
scanning_math = true;
|
|
continue;
|
|
}
|
|
|
|
if (isSpace(ch) && skip_space) {
|
|
val = val.substr(1);
|
|
skip_space = false;
|
|
continue;
|
|
}
|
|
skip_space = false;
|
|
|
|
// Change text mode accents in the form
|
|
// {\v a} to \v{a} (see #9340).
|
|
// FIXME: This is a sort of mini-tex2lyx.
|
|
// Use the real tex2lyx instead!
|
|
static regex const tma_reg("^\\{\\\\[bcCdfGhHkrtuUv]\\s\\w\\}");
|
|
if (regex_search(to_utf8(val), tma_reg)) {
|
|
val = val.substr(1);
|
|
val.replace(2, 1, from_ascii("{"));
|
|
continue;
|
|
}
|
|
|
|
// Apart from the above, we just ignore braces
|
|
if (ch == '{' || ch == '}') {
|
|
val = val.substr(1);
|
|
continue;
|
|
}
|
|
|
|
// we're going to check things that look like commands, so if
|
|
// this doesn't, just output it.
|
|
if (ch != '\\') {
|
|
ret += ch;
|
|
val = val.substr(1);
|
|
continue;
|
|
}
|
|
|
|
// ok, could be a command of some sort
|
|
// let's see if it corresponds to some unicode
|
|
// unicodesymbols has things in the form: \"{u},
|
|
// whereas we may see things like: \"u. So we'll
|
|
// look for that and change it, if necessary.
|
|
// FIXME: This is a sort of mini-tex2lyx.
|
|
// Use the real tex2lyx instead!
|
|
static regex const reg("^\\\\\\W\\w");
|
|
if (regex_search(to_utf8(val), reg)) {
|
|
val.insert(3, from_ascii("}"));
|
|
val.insert(2, from_ascii("{"));
|
|
}
|
|
bool termination;
|
|
docstring rem;
|
|
docstring const cnvtd = fromLaTeXCommand(val,
|
|
TEXT_CMD, termination, rem);
|
|
if (!cnvtd.empty()) {
|
|
// it did, so we'll take that bit and proceed with what's left
|
|
ret += cnvtd;
|
|
val = rem;
|
|
continue;
|
|
}
|
|
// it's a command of some sort
|
|
scanning_cmd = true;
|
|
escaped = true;
|
|
val = val.substr(1);
|
|
}
|
|
// check if it's a know text macro
|
|
// If so, output and skip the following space
|
|
if (!cret.empty()) {
|
|
int const n = findToken(known_text_macros, to_ascii(cret));
|
|
if (n != -1)
|
|
ret += known_text_macros_out[n];
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
|
|
CharInfo const & Encodings::unicodeCharInfo(char_type c)
|
|
{
|
|
static CharInfo empty;
|
|
CharInfoMap::const_iterator const it = unicodesymbols.find(c);
|
|
return it != unicodesymbols.end() ? it->second : empty;
|
|
}
|
|
|
|
|
|
bool Encodings::isCombiningChar(char_type c)
|
|
{
|
|
CharInfoMap::const_iterator const it = unicodesymbols.find(c);
|
|
if (it != unicodesymbols.end())
|
|
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();
|
|
}
|
|
|
|
|
|
string const Encodings::isKnownScriptChar(char_type const c)
|
|
{
|
|
CharInfoMap::const_iterator const it = unicodesymbols.find(c);
|
|
|
|
if (it == unicodesymbols.end())
|
|
return string();
|
|
// FIXME: parse complex textPreamble (may be list or alternatives,
|
|
// e.g., "subscript,textgreek" or "textcomp|textgreek")
|
|
if (it->second.textPreamble() == "textgreek"
|
|
|| it->second.textPreamble() == "textcyrillic")
|
|
return it->second.textPreamble();
|
|
return string();
|
|
}
|
|
|
|
|
|
bool Encodings::fontencSupportsScript(string const & fontenc, string const & script)
|
|
{
|
|
if (script == "textgreek")
|
|
return (fontenc == "LGR" || fontenc == "TU");
|
|
if (script == "textcyrillic")
|
|
return (fontenc == "T2A" || fontenc == "T2B" || fontenc == "T2C"
|
|
|| fontenc == "X2" || fontenc == "TU");
|
|
return false;
|
|
}
|
|
|
|
|
|
bool Encodings::isMathAlpha(char_type c)
|
|
{
|
|
return mathalpha.count(c);
|
|
}
|
|
|
|
|
|
bool Encodings::isUnicodeTextOnly(char_type c)
|
|
{
|
|
if (isASCII(c) || isMathAlpha(c))
|
|
return false;
|
|
|
|
CharInfoMap::const_iterator const it = unicodesymbols.find(c);
|
|
return it == unicodesymbols.end() || it->second.mathCommand().empty();
|
|
}
|
|
|
|
|
|
Encoding const *
|
|
Encodings::fromLyXName(string const & name, bool allowUnsafe) const
|
|
{
|
|
EncodingList::const_iterator const it = encodinglist.find(name);
|
|
if (it == encodinglist.end())
|
|
return nullptr;
|
|
if (!allowUnsafe && it->second.unsafe())
|
|
return nullptr;
|
|
return &it->second;
|
|
}
|
|
|
|
|
|
Encoding const *
|
|
Encodings::fromLaTeXName(string const & n, int 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.
|
|
// Users could even optimize it by putting the encodings they use
|
|
// 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) && (it->second.package() & p)
|
|
&& (!it->second.unsafe() || allowUnsafe))
|
|
return &it->second;
|
|
return nullptr;
|
|
}
|
|
|
|
|
|
Encoding const *
|
|
Encodings::fromIconvName(string const & n, int 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 nullptr;
|
|
}
|
|
|
|
|
|
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;
|
|
while (symbolsLex.isOK()) {
|
|
char_type symbol;
|
|
|
|
if (getNextToken) {
|
|
if (!symbolsLex.next(true))
|
|
break;
|
|
} else
|
|
getNextToken = true;
|
|
|
|
istringstream is(symbolsLex.getString());
|
|
// reading symbol directly does not work if
|
|
// char_type == wchar_t.
|
|
uint32_t tmp;
|
|
if(!(is >> hex >> tmp))
|
|
break;
|
|
symbol = tmp;
|
|
|
|
// Special case: more than one entry for one character (to add other LaTeX commands).
|
|
if (unicodesymbols.find(symbol) != unicodesymbols.end()) {
|
|
if (!symbolsLex.next(true))
|
|
break;
|
|
docstring textCommand = symbolsLex.getDocString();
|
|
if (!symbolsLex.next(true))
|
|
break;
|
|
string mathCommand = symbolsLex.getString();
|
|
|
|
if (!textCommand.empty())
|
|
unicodesymbols.at(symbol).addTextCommand(textCommand);
|
|
if (!mathCommand.empty())
|
|
unicodesymbols.at(symbol).addMathCommand(textCommand);
|
|
|
|
continue;
|
|
}
|
|
|
|
// If the symbol is not the same as the previous entry, consider it is a totally new symbol.
|
|
if (!symbolsLex.next(true))
|
|
break;
|
|
docstring textCommand = symbolsLex.getDocString();
|
|
if (!symbolsLex.next(true))
|
|
break;
|
|
string textPreamble = symbolsLex.getString();
|
|
if (!symbolsLex.next(true))
|
|
break;
|
|
string sflags = symbolsLex.getString();
|
|
|
|
string tipaShortcut;
|
|
int flags = 0;
|
|
|
|
if (suffixIs(textCommand, '}'))
|
|
flags |= CharInfoTextNoTermination;
|
|
while (!sflags.empty()) {
|
|
string flag;
|
|
sflags = split(sflags, flag, ',');
|
|
if (flag == "combining") {
|
|
flags |= CharInfoCombining;
|
|
} else if (flag == "force") {
|
|
flags |= CharInfoForce;
|
|
forced.insert(symbol);
|
|
} else if (prefixIs(flag, "force=")) {
|
|
vector<string> encs =
|
|
getVectorFromString(flag.substr(6), ";");
|
|
for (auto const & enc : encs)
|
|
forcedSelected[enc].insert(symbol);
|
|
flags |= CharInfoForceSelected;
|
|
} else if (prefixIs(flag, "force!=")) {
|
|
vector<string> encs =
|
|
getVectorFromString(flag.substr(7), ";");
|
|
for (auto const & enc : encs)
|
|
forcedNotSelected[enc].insert(symbol);
|
|
flags |= CharInfoForceSelected;
|
|
} else if (flag == "mathalpha") {
|
|
mathalpha.insert(symbol);
|
|
} else if (flag == "notermination=text") {
|
|
flags |= CharInfoTextNoTermination;
|
|
} else if (flag == "notermination=math") {
|
|
flags |= CharInfoMathNoTermination;
|
|
} else if (flag == "notermination=both") {
|
|
flags |= CharInfoTextNoTermination;
|
|
flags |= CharInfoMathNoTermination;
|
|
} else if (flag == "notermination=none") {
|
|
flags &= ~CharInfoTextNoTermination;
|
|
flags &= ~CharInfoMathNoTermination;
|
|
} else if (contains(flag, "tipashortcut=")) {
|
|
tipaShortcut = split(flag, '=');
|
|
} else if (flag == "deprecated") {
|
|
flags |= CharInfoDeprecated;
|
|
} 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;
|
|
docstring mathCommand;
|
|
string mathPreamble;
|
|
if (symbolsLex.next(true)) {
|
|
if (symbolsLex.lineNumber() != lineNo) {
|
|
// line in old format without mathCommand and mathPreamble
|
|
getNextToken = false;
|
|
} else {
|
|
mathCommand = symbolsLex.getDocString();
|
|
if (suffixIs(mathCommand, '}'))
|
|
flags |= CharInfoMathNoTermination;
|
|
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
|
|
mathPreamble = symbolsLex.getString();
|
|
}
|
|
} else
|
|
breakout = true;
|
|
}
|
|
} else {
|
|
breakout = true;
|
|
}
|
|
|
|
// backward compatibility
|
|
if (mathPreamble == "esintoramsmath")
|
|
mathPreamble = "esint|amsmath";
|
|
|
|
if (!textPreamble.empty())
|
|
if (textPreamble[0] != '\\')
|
|
flags |= CharInfoTextFeature;
|
|
if (!mathPreamble.empty())
|
|
if (mathPreamble[0] != '\\')
|
|
flags |= CharInfoMathFeature;
|
|
|
|
CharInfo info = CharInfo(
|
|
textCommand, mathCommand,
|
|
textPreamble, mathPreamble,
|
|
tipaShortcut, flags);
|
|
LYXERR(Debug::INFO, "Read unicode symbol " << symbol << " '"
|
|
<< to_utf8(info.textCommand()) << "' '" << info.textPreamble()
|
|
<< " '" << 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.isUnicodeSymbol()) {
|
|
unicodesymbols[symbol] = info;
|
|
}
|
|
|
|
if (breakout)
|
|
break;
|
|
}
|
|
|
|
// Now read the encodings
|
|
enum {
|
|
et_encoding = 1,
|
|
et_end
|
|
};
|
|
|
|
LexerKeyword encodingTags[] = {
|
|
{ "encoding", et_encoding },
|
|
{ "end", et_end }
|
|
};
|
|
|
|
Lexer lex(encodingTags);
|
|
lex.setFile(encfile);
|
|
lex.setContext("Encodings::read");
|
|
while (lex.isOK()) {
|
|
switch (lex.lex()) {
|
|
case et_encoding:
|
|
{
|
|
lex.next();
|
|
string const name = lex.getString();
|
|
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");
|
|
|
|
lex.next();
|
|
string const p = lex.getString();
|
|
Encoding::Package package = Encoding::none;
|
|
if (p == "none")
|
|
package = Encoding::none;
|
|
else if (p == "inputenc")
|
|
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,
|
|
guiName, iconvName, fixedWidth, unsafe,
|
|
package);
|
|
|
|
if (lex.lex() != et_end)
|
|
lex.printError("Missing end");
|
|
break;
|
|
}
|
|
case et_end:
|
|
lex.printError("Misplaced end");
|
|
break;
|
|
case Lexer::LEX_FEOF:
|
|
break;
|
|
default:
|
|
lex.printError("Unknown tag");
|
|
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());
|
|
}
|
|
}
|
|
|
|
}
|
|
|
|
|
|
} // namespace lyx
|