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Fix remainder of #9681 (textcyrillic and textgreek handling).

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* Fix macro termination if \textcyrillic or \textgreek is not required
  for Greek or Cyrillic letter.

* Replace "writeScriptChars" with conditionals in the character-output loop in
  "Paragraph::latex" (solves "FIXME: modifying i here is not very nice...").

The font changing commands \textcyrillic and \textgreek are no longer
part of the textcommand in "lib/unicodesymbols" but added when required
in Paragraph::Private::latexSpecialChar.
This commit is contained in:
Günter Milde 2019-03-11 15:24:22 +01:00
parent 1933102593
commit d6d98ffbe4
4 changed files with 627 additions and 737 deletions
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1102
lib/unicodesymbols
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File diff suppressed because it is too large Load Diff

35
src/Encoding.cpp
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@ -580,36 +580,29 @@ string const Encodings::TIPAShortcut(char_type c)
return string();
}
// Return true, if `c` is a supported Greek or Cyrillic letter.
bool Encodings::isKnownScriptChar(char_type const c, string & preamble)
string const Encodings::isKnownScriptChar(char_type const c)
{
CharInfoMap::const_iterator const it = unicodesymbols.find(c);
if (it == unicodesymbols.end())
return false;
if (it->second.textpreamble() != "textgreek"
&& it->second.textpreamble() != "textcyrillic")
return false;
if (preamble.empty()) {
preamble = it->second.textpreamble();
return true;
}
return it->second.textpreamble() == preamble;
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::needsScriptWrapper(string const & script, string const & fontenc)
bool Encodings::fontencSupportsScript(string const & fontenc, string const & script)
{
// Note: the wrapper is not required with Unicode font encoding "TU".
// However, this function is not called with non-TeX (Unicode) fonts.
if (script == "textgreek")
return (fontenc != "LGR");
if (script == "textcyrillic") {
return (fontenc != "T2A" && fontenc != "T2B"
&& fontenc != "T2C" && fontenc != "X2");
}
return (fontenc == "LGR" || fontenc == "TU");
if (script == "textcyrillic")
return (fontenc == "T2A" || fontenc == "T2B" || fontenc == "T2C"
|| fontenc == "X2" || fontenc == "TU");
return false;
}

16
src/Encoding.h
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@ -272,17 +272,13 @@ public:
/// Return the TIPA shortcut
static std::string const TIPAShortcut(char_type c);
/**
* Is this a known char from some language?
* If \p preamble is empty and code point \p c is known to belong
* to a supported script, true is returned and \p preamble is set
* to the corresponding entry in the unicodesymbols file.
* If \p preamble is not empty, a check is made whether code point
* \p c is a known character matching the preamble entry.
* Test, if \p c is a supported Greek or Cyrillic letter.
* Return script macro name or empty string.
*/
static bool isKnownScriptChar(char_type const c, std::string & preamble);
/// Do we need to wrap scripts into \text<script> macros?
static bool needsScriptWrapper(std::string const & script,
std::string const & fontenc);
static std::string const isKnownScriptChar(char_type const c);
/// Does \p fontenc support characters in \p script?
static bool fontencSupportsScript(std::string const & fontenc,
std::string const & script);
/**
* Do we have to display in italics this character when in mathmode?
* This is true if the "mathalpha" flag is set. We use this for

211
src/Paragraph.cpp
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@ -329,15 +329,6 @@ public:
Font const & font,
Layout const & style);
/// Output consecutive unicode chars, belonging to the same script as
/// specified by the latex macro \p ltx, to \p os starting from \p i.
/// \return the number of characters written.
int writeScriptChars(BufferParams const &, OutputParams const &,
otexstream & os,
docstring const & ltx,
Change const &, Encoding const &,
std::string const, pos_type & i);
/// This could go to ParagraphParameters if we want to.
int startTeXParParams(BufferParams const &, otexstream &,
OutputParams const &) const;
@ -365,7 +356,7 @@ public:
BufferParams const & bparams,
OutputParams const & runparams,
Font const & running_font,
Change const & running_change,
string & alien_script,
Layout const & style,
pos_type & i,
pos_type end_pos,
@ -891,47 +882,15 @@ int Paragraph::Private::latexSurrogatePair(BufferParams const & bparams,
}
docstring latex2 = encoding.latexChar(c).first;
// Handle combining characters in "script" context (i.e., \textgreek and \textcyrillic)
docstring::size_type const brace1 = latex2.find_first_of(from_ascii("{"));
docstring::size_type const brace2 = latex2.find_last_of(from_ascii("}"));
string script = to_ascii(latex2.substr(1, brace1 - 1));
// Greek and Cyrillic letters need to be wrapped in \textcyrillic and \textgreek if they
// are not encodable in the current font encoding (regardless of the input encoding).
bool scriptchar = false;
if (!bparams.useNonTeXFonts) // With non-TeX fonts the font encoding is Unicode.
scriptchar = Encodings::isKnownScriptChar(c, script);
if (!scriptchar && docstring(1, next) == latex1) {
// Font and input encoding support the combination:
if (bparams.useNonTeXFonts || docstring(1, next) == latex1) {
// Encoding supports the combination:
// output as is (combining char after base char).
os << latex2 << latex1;
return latex1.length() + latex2.length();
}
int pos = 0;
int length = brace2;
string fontenc;
if (runparams.local_font)
fontenc = runparams.local_font->language()->fontenc(bparams);
else
fontenc = bparams.language->fontenc(bparams);
docstring scriptmacro;
docstring cb;
if (script == "textgreek" || script == "textcyrillic") {
// Strip the \text(greek|cyrillic) script macro ...
pos = brace1 + 1;
length -= pos;
latex2 = latex2.substr(pos, length);
// and place it before the accent macro if required (#6463)
if (Encodings::needsScriptWrapper(script, fontenc)) {
scriptmacro = from_ascii("\\" + script + "{");
cb = from_ascii("}");
}
}
os << scriptmacro << latex1 << "{" << latex2 << "}" << cb;
return latex1.length() + 1 + latex2.length() + 1 + cb.length();
os << latex1 << "{" << latex2 << "}";
return latex1.length() + latex2.length() + 2;
}
@ -981,94 +940,6 @@ bool Paragraph::Private::simpleTeXBlanks(BufferParams const & bparams,
}
int Paragraph::Private::writeScriptChars(BufferParams const & bparams,
OutputParams const & runparams,
otexstream & os,
docstring const & ltx,
Change const & runningChange,
Encoding const & encoding,
string const fontenc,
pos_type & i)
{
// FIXME: modifying i here is not very nice...
// We only arrive here when character text_[i] could not be translated
// into the current latex encoding (or its latex translation has been forced,)
// and it belongs to a known script.
// Parameter ltx contains the latex translation of text_[i] as specified
// in the unicodesymbols file and is something like "\textXXX{<spec>}".
// The latex macro name "textXXX" specifies the script to which text_[i]
// belongs and we use it in order to check whether characters from the
// same script immediately follow, such that we can collect them in a
// single "\textXXX" macro. So, we have to retain "\textXXX{<spec>"
// for the first char but only "<spec>" for all subsequent chars.
docstring::size_type const brace1 = ltx.find_first_of(from_ascii("{"));
docstring::size_type const brace2 = ltx.find_last_of(from_ascii("}"));
string script = to_ascii(ltx.substr(1, brace1 - 1));
int pos = 0;
int length = brace2;
bool closing_brace = true;
// We only need the script macro with non-native font encodings
if (!Encodings::needsScriptWrapper(script, fontenc)) {
// Correct font encoding is being used, so we can avoid \text(greek|cyrrillic).
pos = brace1 + 1;
length -= pos;
closing_brace = false;
}
os << ltx.substr(pos, length);
int size = text_.size();
while (i + 1 < size) {
char_type const next = text_[i + 1];
// Stop here if next character belongs to another script
// or there is a change in change tracking status.
if (!Encodings::isKnownScriptChar(next, script) ||
runningChange != owner_->lookupChange(i + 1))
break;
Font prev_font;
bool found = false;
FontList::const_iterator cit = fontlist_.begin();
FontList::const_iterator end = fontlist_.end();
for (; cit != end; ++cit) {
if (cit->pos() >= i && !found) {
prev_font = cit->font();
found = true;
}
if (cit->pos() >= i + 1)
break;
}
// Stop here if there is a font attribute or encoding change.
if (found && cit != end && prev_font != cit->font())
break;
// Check whether we have a combining pair
char_type next_next = '\0';
if (i + 2 < size) {
next_next = text_[i + 2];
if (Encodings::isCombiningChar(next_next)) {
length += latexSurrogatePair(bparams, os, next, next_next, runparams) - 1;
i += 2;
continue;
}
}
docstring const latex = encoding.latexChar(next).first;
docstring::size_type const b1 =
latex.find_first_of(from_ascii("{"));
docstring::size_type const b2 =
latex.find_last_of(from_ascii("}"));
int const len = b2 - b1 - 1;
os << latex.substr(b1 + 1, len);
length += len;
++i;
}
if (closing_brace) {
os << '}';
++length;
}
return length;
}
void Paragraph::Private::latexInset(BufferParams const & bparams,
otexstream & os,
OutputParams & runparams,
@ -1218,7 +1089,7 @@ void Paragraph::Private::latexSpecialChar(otexstream & os,
BufferParams const & bparams,
OutputParams const & runparams,
Font const & running_font,
Change const & running_change,
string & alien_script,
Layout const & style,
pos_type & i,
pos_type end_pos,
@ -1360,12 +1231,11 @@ void Paragraph::Private::latexSpecialChar(otexstream & os,
break;
}
}
string script;
pair<docstring, bool> latex = encoding.latexChar(c);
docstring nextlatex;
bool nexttipas = false;
string nexttipashortcut;
if (next != '\0' && next != META_INSET && encoding.encodable(next)) {
if (next != '\0' && next != META_INSET && !encoding.encodable(next)) {
nextlatex = encoding.latexChar(next).first;
if (runparams.inIPA) {
nexttipashortcut = Encodings::TIPAShortcut(next);
@ -1381,27 +1251,22 @@ void Paragraph::Private::latexSpecialChar(otexstream & os,
tipas = true;
}
}
string fontenc;
fontenc = running_font.language()->fontenc(bparams);
// "Script chars" need to embraced in \textcyrillic and \textgreek notwithstanding
// whether they are encodable or not (it only depends on the font encoding),
// except if we are using fontspec.
if (!bparams.useNonTeXFonts && Encodings::isKnownScriptChar(c, script)) {
docstring const wrapper = from_ascii("\\" + script + "{");
docstring ltx = latex.first;
if (!prefixIs(ltx, wrapper))
ltx = wrapper + latex.first + from_ascii("}");
column += writeScriptChars(bparams, runparams, os, ltx, running_change,
encoding, fontenc, i) - 1;
} else if (latex.second
// eventually close "script wrapper" command (see `Paragraph::latex`)
if (!alien_script.empty()
&& alien_script != Encodings::isKnownScriptChar(next)) {
column += latex.first.length();
alien_script.clear();
os << latex.first << "}";
break;
}
if (latex.second
&& ((!prefixIs(nextlatex, '\\')
&& !prefixIs(nextlatex, '{')
&& !prefixIs(nextlatex, '}'))
|| (nexttipas
&& !prefixIs(from_ascii(nexttipashortcut), '\\')))
&& !tipas) {
// Prevent eating of a following
// space or command corruption by
// Prevent eating of a following space or command corruption by
// following characters
if (next == ' ' || next == '\0') {
column += latex.first.length() + 1;
@ -2487,6 +2352,11 @@ void Paragraph::latex(BufferParams const & bparams,
// of the body.
Font basefont;
// If there is an open font-encoding changing command (script wrapper),
// alien_script is set to its name
string alien_script;
string script;
// Maybe we have to create a optional argument.
pos_type body_pos = beginOfBody();
unsigned int column = 0;
@ -2617,6 +2487,11 @@ void Paragraph::latex(BufferParams const & bparams,
}
if (bparams.output_changes && runningChange != change) {
if (!alien_script.empty()) {
column += 1;
os << "}";
alien_script.clear();
}
if (open_font) {
bool needPar = false;
column += running_font.latexWriteEndChanges(
@ -2649,6 +2524,12 @@ void Paragraph::latex(BufferParams const & bparams,
(current_font != running_font ||
current_font.language() != running_font.language()))
{
// ensure there is no open script-wrapper
if (!alien_script.empty()) {
column += 1;
os << "}";
alien_script.clear();
}
bool needPar = false;
column += running_font.latexWriteEndChanges(
os, bparams, runparams, basefont,
@ -2806,10 +2687,24 @@ void Paragraph::latex(BufferParams const & bparams,
--parInline;
}
} else if (i >= start_pos && (end_pos == -1 || i < end_pos)) {
if (!bparams.useNonTeXFonts)
script = Encodings::isKnownScriptChar(c);
if (script != alien_script) {
if (!alien_script.empty()) {
os << "}";
alien_script.clear();
}
string fontenc = running_font.language()->fontenc(bparams);
if (!script.empty()
&& !Encodings::fontencSupportsScript(fontenc, script)) {
column += script.length() + 2;
os << "\\" << script << "{";
alien_script = script;
}
}
try {
d->latexSpecialChar(os, bparams, rp,
running_font, runningChange,
style, i, end_pos, column);
d->latexSpecialChar(os, bparams, rp, running_font,
alien_script, style, i, end_pos, column);
} catch (EncodingException & e) {
if (runparams.dryrun) {
os << "<" << _("LyX Warning: ")
@ -2838,6 +2733,12 @@ void Paragraph::latex(BufferParams const & bparams,
runparams.post_macro = rp.post_macro;
}
// Close wrapper for alien script
if (!alien_script.empty()) {
os << "}";
alien_script.clear();
}
// If we have an open font definition, we have to close it
if (open_font) {
// Make sure that \\par is done with the font of the last