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Correctly generate latex for font/language/encoding switches inside and around

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insets. Up until now this has not been 100% correct, especially in the case
of RTL languages (but not only those).
This fixes bug 1820 (http://bugzilla.lyx.org/show_bug.cgi?id=1820)


git-svn-id: svn://svn.lyx.org/lyx/lyx-devel/trunk@19150 a592a061-630c-0410-9148-cb99ea01b6c8
This commit is contained in:
Dov Feldstern 2007-07-20 01:28:20 +00:00
parent 29be500207
commit 6a8b25ba51
5 changed files with 156 additions and 25 deletions
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16
RELEASE-NOTES
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@ -35,6 +35,22 @@ When using multiple Windows to edit different parts of the
same document, the cursor position is sometimes not correctly restored
when you switch from one view to the other.
- Languages/encodings and insets
One of the bugs fixed in LyX 1.5.0 is that previously, there were certain
specific cases in which the LaTeX generated did not correctly reflect
language/encoding transitions in and around insets (footnotes, LyX notes).
After much deliberation, it was decided not to change older files such that
they will still reflect the old LaTeX output; rather, they will now correctly
reflect the situation as it appears in the GUI. This means, however, that if
you mangled the text in the GUI in the older versions, in order that it
generate the correct LaTeX output, the LaTeX will now generate the mangled
text. If this is problematic for you, please get in touch with us on the
developers mailing list, we do have some possible solutions for this.
The effects of this will be more pronounced for RTL (Hebrew, Arabic, Farsi)
users --- though they affect users of other languages as well.
Note: There may later be an updated list of known issues online at
http://wiki.lyx.org/LyX/ReleaseNotes

6
src/Font.cpp
View File

@ -876,7 +876,8 @@ int Font::latexWriteStartChanges(odocstream & os, BufferParams const & bparams,
int Font::latexWriteEndChanges(odocstream & os, BufferParams const & bparams,
OutputParams const & runparams,
Font const & base,
Font const & next) const
Font const & next,
bool const & closeLanguage) const
{
int count = 0;
bool env = false;
@ -955,7 +956,8 @@ int Font::latexWriteEndChanges(odocstream & os, BufferParams const & bparams,
open_encoding_ = false;
}
if (language() != base.language() && language() != next.language()) {
if (closeLanguage &&
language() != base.language() && language() != next.language()) {
os << '}';
++count;
}

3
src/Font.h
View File

@ -309,7 +309,8 @@ public:
int latexWriteEndChanges(odocstream &, BufferParams const & bparams,
OutputParams const & runparams,
Font const & base,
Font const & next) const;
Font const & next,
bool const & closeLanguage = true) const;
/// Build GUI description of font state

37
src/Paragraph.cpp
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@ -191,7 +191,7 @@ public:
///
void simpleTeXSpecialChars(Buffer const &, BufferParams const &,
odocstream &,
TexRow & texrow, OutputParams const &,
TexRow & texrow, OutputParams &,
Font & running_font,
Font & basefont,
Font const & outerfont,
@ -662,7 +662,7 @@ void Paragraph::Pimpl::simpleTeXSpecialChars(Buffer const & buf,
BufferParams const & bparams,
odocstream & os,
TexRow & texrow,
OutputParams const & runparams,
OutputParams & runparams,
Font & running_font,
Font & basefont,
Font const & outerfont,
@ -752,14 +752,35 @@ void Paragraph::Pimpl::simpleTeXSpecialChars(Buffer const & buf,
// right now, which means stupid latex code like \textsf{}. AFAIK,
// this does not harm dvi output. A minor bug, thus (JMarc)
#endif
// some insets cannot be inside a font change command
// Some insets cannot be inside a font change command.
// However, even such insets *can* be placed in \L or \R
// or their equivalents (for RTL language switches), so we don't
// close the language in those cases.
// ArabTeX, though, cannot handle this special behavior, it seems.
bool arabtex = basefont.language()->lang() == "arabic_arabtex" ||
running_font.language()->lang() == "arabic_arabtex";
if (open_font && inset->noFontChange()) {
column += running_font.latexWriteEndChanges(
bool closeLanguage = arabtex ||
basefont.isRightToLeft() == running_font.isRightToLeft();
unsigned int count = running_font.latexWriteEndChanges(
os, bparams, runparams,
basefont, basefont);
open_font = false;
basefont, basefont, closeLanguage);
column += count;
// if any font properties were closed, update the running_font,
// making sure, however, to leave the language as it was
if (count > 0) {
// FIXME: probably a better way to keep track of the old
// language, than copying the entire font?
Font const copy_font(running_font);
basefont = owner_->getLayoutFont(bparams, outerfont);
running_font = basefont;
if (!closeLanguage)
running_font.setLanguage(copy_font.language());
// leave font open if language is still open
open_font = (running_font.language() == basefont.language());
if (closeLanguage)
runparams.local_font = &basefont;
}
}
int tmp = inset->latex(buf, os, runparams);
@ -2120,6 +2141,10 @@ bool Paragraph::simpleTeXOnePar(Buffer const & buf,
texrow, rp, running_font,
basefont, outerfont, open_font,
runningChange, *style, i, column, c);
// Set the encoding to that returned from simpleTeXSpecialChars (see
// comment for encoding member in OutputParams.h)
runparams.encoding = rp.encoding;
}
// If we have an open font definition, we have to close it

113
src/output_latex.cpp
View File

@ -259,14 +259,23 @@ TeXOnePar(Buffer const & buf,
OutputParams runparams = runparams_in;
runparams.moving_arg |= style->needprotect;
// This paragraph's language
Language const * const par_language = pit->getParLanguage(bparams);
// The document's language
Language const * const doc_language = bparams.language;
Language const * const prev_par_language =
(pit != paragraphs.begin())
? boost::prior(pit)->getParLanguage(bparams)
: doc_language;
// The language that was in effect when the environemnt this paragraph is
// inside of was opened
Language const * const outer_language =
(runparams.local_font != 0) ?
runparams.local_font->language() : doc_language;
// The previous language that was in effect is either the language of
// the previous paragraph, if there is one, or else the outer language
// if there is no previous paragraph
Language const * const prev_language =
(pit != paragraphs.begin()) ?
boost::prior(pit)->getParLanguage(bparams) : outer_language;
if (par_language->babel() != prev_par_language->babel()
if (par_language->babel() != prev_language->babel()
// check if we already put language command in TeXEnvironment()
&& !(style->isEnvironment()
&& (pit == paragraphs.begin() ||
@ -275,19 +284,61 @@ TeXOnePar(Buffer const & buf,
|| boost::prior(pit)->getDepth() < pit->getDepth())))
{
if (!lyxrc.language_command_end.empty() &&
prev_par_language->babel() != doc_language->babel() &&
!prev_par_language->babel().empty())
prev_language->babel() != outer_language->babel() &&
!prev_language->babel().empty())
{
os << from_ascii(subst(lyxrc.language_command_end,
"$$lang",
prev_par_language->babel()))
prev_language->babel()))
<< '\n';
texrow.newline();
}
// We need to open a new language if we couldn't close the previous
// one (because there's no language_command_end); and even if we closed
// the previous one, if the current language is different than the
// outer_language (which is currently in effect once the previous one
// is closed).
if ((lyxrc.language_command_end.empty() ||
par_language->babel() != doc_language->babel()) &&
par_language->babel() != outer_language->babel()) &&
!par_language->babel().empty()) {
// If we're inside an inset, and that inset is within an \L or \R
// (or equivalents), then within the inset, too, any opposite
// language paragraph should appear within an \L or \R (in addition
// to, outside of, the normal language switch commands).
// This behavior is not correct for ArabTeX, though.
if ( // not for ArabTeX
(par_language->lang() != "arabic_arabtex" &&
outer_language->lang() != "arabic_arabtex") &&
// are we in an inset?
runparams.local_font != 0 &&
// is the inset within an \L or \R?
//
// FIXME: currently, we don't check this; this means that
// we'll have unnnecessary \L and \R commands, but that
// doesn't seem to hurt (though latex will complain)
//
// is this paragraph in the opposite direction?
runparams.local_font->isRightToLeft() !=
par_language->rightToLeft()
) {
// FIXME: I don't have a working copy of the Arabi package, so
// I'm not sure if the farsi and arabic_arabi stuff is correct
// or not...
if (par_language->lang() == "farsi")
os << "\\textFR{";
else if (outer_language->lang() == "farsi")
os << "\\textLR{";
else if (par_language->lang() == "arabic_arabi")
os << "\\textAR{";
else if (outer_language->lang() == "arabic_arabi")
os << "\\textLR{";
// remaining RTL languages currently is hebrew
else if (par_language->rightToLeft())
os << "\\R{";
else
os << "\\L{";
}
os << from_ascii(subst(
lyxrc.language_command_begin,
"$$lang",
@ -457,8 +508,25 @@ TeXOnePar(Buffer const & buf,
}
}
if (boost::next(pit) == paragraphs.end()
&& par_language->babel() != doc_language->babel()) {
// Closing the language is needed for the last paragraph; it is also
// needed if we're within an \L or \R that we may have opened above (not
// necessarily in this paragraph) and are about to close.
bool closing_rtl_ltr_environment =
// not for ArabTeX
(par_language->lang() != "arabic_arabtex" &&
outer_language->lang() != "arabic_arabtex") &&
// have we opened and \L or \R environment?
runparams.local_font != 0 &&
runparams.local_font->isRightToLeft() != par_language->rightToLeft() &&
// are we about to close the language?
((boost::next(pit) != paragraphs.end() &&
par_language->babel() !=
(boost::next(pit)->getParLanguage(bparams))->babel()) ||
(boost::next(pit) == paragraphs.end() &&
par_language->babel() != outer_language->babel()));
if (closing_rtl_ltr_environment || (boost::next(pit) == paragraphs.end()
&& par_language->babel() != outer_language->babel())) {
// Since \selectlanguage write the language to the aux file,
// we need to reset the language at the end of footnote or
// float.
@ -468,11 +536,11 @@ TeXOnePar(Buffer const & buf,
texrow.newline();
}
if (lyxrc.language_command_end.empty()) {
if (!doc_language->babel().empty()) {
if (!prev_language->babel().empty()) {
os << from_ascii(subst(
lyxrc.language_command_begin,
"$$lang",
doc_language->babel()));
prev_language->babel()));
pending_newline = true;
}
} else if (!par_language->babel().empty()) {
@ -483,13 +551,32 @@ TeXOnePar(Buffer const & buf,
pending_newline = true;
}
}
if (closing_rtl_ltr_environment)
os << "}";
if (pending_newline) {
os << '\n';
texrow.newline();
}
// If this is the last paragraph, and a local_font was set upon entering
// the inset, the encoding should be set back to that local_font's
// encoding. We don't use switchEncoding(), because no explicit encoding
// switch command is needed, since latex will automatically revert to it
// when this inset closes.
// This switch is only necessary if we're using "auto" or "default"
// encoding.
if (boost::next(pit) == paragraphs.end() && runparams_in.local_font != 0) {
runparams_in.encoding = runparams_in.local_font->language()->encoding();
if (bparams.inputenc == "auto" || bparams.inputenc == "default")
os << setEncoding(runparams_in.encoding->iconvName());
}
// Otherwise, the current encoding should be set for the next paragraph.
else
runparams_in.encoding = runparams.encoding;
// we don't need it for the last paragraph!!!
// Note from JMarc: we will re-add a \n explicitely in
// TeXEnvironment, because it is needed in this case