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lyx_mirror/src/output_latex.cpp
Georg Baum 8e8c214bef Fix some bugs related to spaces in math: 
- Interpret argument of LFUN_SPACE_INSERT correctly
- Use InsetMathSpace instead of InsetMathSpecialChar for "\ " (bug # 7728)
- Use InsetMathSpace instead of InsetMathChar for ~ (bug # 7728).
  This fixes also the display in LyX (previously a literal ~ was displayed).
Using InsetMathSpace enables also the "Insert Formatting" menu entries.
No file format change is needed, since the LaTeX export is unchanged.
Note that there are still some bugs related to spaces in math:
#7746, #7747, #7749, #7842


git-svn-id: svn://svn.lyx.org/lyx/lyx-devel/trunk@39947 a592a061-630c-0410-9148-cb99ea01b6c8
2011-10-23 20:19:49 +00:00

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/**
* \file output_latex.cpp
* This file is part of LyX, the document processor.
* Licence details can be found in the file COPYING.
*
* \author Lars Gullik Bjønnes
*
* Full author contact details are available in file CREDITS.
*/
#include <config.h>
#include "output_latex.h"
#include "Buffer.h"
#include "BufferParams.h"
#include "Encoding.h"
#include "Font.h"
#include "InsetList.h"
#include "Language.h"
#include "Layout.h"
#include "LyXRC.h"
#include "OutputParams.h"
#include "Paragraph.h"
#include "ParagraphParameters.h"
#include "TextClass.h"
#include "TexRow.h"
#include "insets/InsetBibitem.h"
#include "insets/InsetArgument.h"
#include "support/lassert.h"
#include "support/debug.h"
#include "support/lstrings.h"
#include <boost/next_prior.hpp>
#include <list>
using namespace std;
using namespace lyx::support;
namespace lyx {
namespace {
enum OpenEncoding {
none,
inputenc,
CJK
};
static int open_encoding_ = none;
static int cjk_inherited_ = 0;
Language const * prev_env_language_ = 0;
string const getPolyglossiaEnvName(Language const * lang)
{
string result = lang->polyglossia();
if (result == "arabic")
// exceptional spelling; see polyglossia docs.
result = "Arabic";
return result;
}
struct TeXEnvironmentData
{
bool cjk_nested;
Layout const * style;
Language const * par_language;
Encoding const * prev_encoding;
bool leftindent_open;
};
static TeXEnvironmentData prepareEnvironment(Buffer const & buf,
Text const & text,
ParagraphList::const_iterator pit,
otexstream & os,
OutputParams const & runparams)
{
TeXEnvironmentData data;
BufferParams const & bparams = buf.params();
// FIXME This test should not be necessary.
// We should perhaps issue an error if it is.
Layout const & style = text.inset().forcePlainLayout() ?
bparams.documentClass().plainLayout() : pit->layout();
ParagraphList const & paragraphs = text.paragraphs();
ParagraphList::const_iterator const priorpit =
pit == paragraphs.begin() ? pit : boost::prior(pit);
bool const use_prev_env_language = prev_env_language_ != 0
&& priorpit->layout().isEnvironment()
&& (priorpit->getDepth() > pit->getDepth()
|| (priorpit->getDepth() == pit->getDepth()
&& priorpit->layout() != pit->layout()));
data.prev_encoding = runparams.encoding;
data.par_language = pit->getParLanguage(bparams);
Language const * const doc_language = bparams.language;
Language const * const prev_par_language =
(pit != paragraphs.begin())
? (use_prev_env_language ? prev_env_language_
: priorpit->getParLanguage(bparams))
: doc_language;
bool const use_pg = runparams.use_polyglossia;
string const par_lang = use_pg ?
getPolyglossiaEnvName(data.par_language) : data.par_language->babel();
string const prev_par_lang = use_pg ?
getPolyglossiaEnvName(prev_par_language) : prev_par_language->babel();
string const doc_lang = use_pg ?
getPolyglossiaEnvName(doc_language) : doc_language->babel();
string const lang_begin_command = use_pg ?
"\\begin{$$lang}" : lyxrc.language_command_begin;
string const lang_end_command = use_pg ?
"\\end{$$lang}" : lyxrc.language_command_end;
if (par_lang != prev_par_lang) {
if (!lang_end_command.empty() &&
prev_par_lang != doc_lang &&
!prev_par_lang.empty()) {
os << from_ascii(subst(
lang_end_command,
"$$lang",
prev_par_lang))
// the '%' is necessary to prevent unwanted whitespace
<< "%\n";
}
if ((lang_end_command.empty() ||
par_lang != doc_lang) &&
!par_lang.empty()) {
os << from_ascii(subst(
lang_begin_command,
"$$lang",
par_lang));
if (runparams.use_polyglossia
&& !data.par_language->polyglossiaOpts().empty())
os << "["
<< from_ascii(data.par_language->polyglossiaOpts())
<< "]";
// the '%' is necessary to prevent unwanted whitespace
os << "%\n";
}
}
data.leftindent_open = false;
if (!pit->params().leftIndent().zero()) {
os << "\\begin{LyXParagraphLeftIndent}{"
<< from_ascii(pit->params().leftIndent().asLatexString())
<< "}\n";
data.leftindent_open = true;
}
if (style.isEnvironment()) {
os << "\\begin{" << from_ascii(style.latexname()) << '}';
if (style.optargs != 0 || style.reqargs != 0)
latexArgInsets(*pit, os, runparams, style.reqargs, style.optargs);
if (style.latextype == LATEX_LIST_ENVIRONMENT) {
os << '{'
<< pit->params().labelWidthString()
<< "}\n";
} else if (style.labeltype == LABEL_BIBLIO) {
if (pit->params().labelWidthString().empty())
os << '{' << bibitemWidest(buf, runparams) << "}\n";
else
os << '{'
<< pit->params().labelWidthString()
<< "}\n";
} else
os << from_ascii(style.latexparam()) << '\n';
}
data.style = &style;
// in multilingual environments, the CJK tags have to be nested properly
data.cjk_nested = false;
if (data.par_language->encoding()->package() == Encoding::CJK &&
open_encoding_ != CJK && pit->isMultiLingual(bparams)) {
if (prev_par_language->encoding()->package() == Encoding::CJK)
os << "\\begin{CJK}{" << from_ascii(data.par_language->encoding()->latexName())
<< "}{" << from_ascii(bparams.fonts_cjk) << "}%\n";
open_encoding_ = CJK;
data.cjk_nested = true;
}
return data;
}
static void finishEnvironment(otexstream & os, OutputParams const & runparams,
TeXEnvironmentData const & data)
{
if (open_encoding_ == CJK && data.cjk_nested) {
// We need to close the encoding even if it does not change
// to do correct environment nesting
os << "\\end{CJK}\n";
open_encoding_ = none;
}
if (data.style->isEnvironment()) {
os << "\\end{" << from_ascii(data.style->latexname()) << "}\n";
prev_env_language_ = data.par_language;
if (runparams.encoding != data.prev_encoding) {
runparams.encoding = data.prev_encoding;
if (!runparams.isFullUnicode())
os << setEncoding(data.prev_encoding->iconvName());
}
}
if (data.leftindent_open) {
os << "\\end{LyXParagraphLeftIndent}\n";
prev_env_language_ = data.par_language;
if (runparams.encoding != data.prev_encoding) {
runparams.encoding = data.prev_encoding;
if (!runparams.isFullUnicode())
os << setEncoding(data.prev_encoding->iconvName());
}
}
}
void TeXEnvironment(Buffer const & buf, Text const & text,
OutputParams const & runparams,
pit_type & pit, otexstream & os)
{
ParagraphList const & paragraphs = text.paragraphs();
ParagraphList::const_iterator par = paragraphs.constIterator(pit);
LYXERR(Debug::LATEX, "TeXEnvironment for paragraph " << pit);
Layout const & current_layout = par->layout();
depth_type const current_depth = par->params().depth();
Length const & current_left_indent = par->params().leftIndent();
// This is for debugging purpose at the end.
pit_type const par_begin = pit;
for (; pit < runparams.par_end; ++pit) {
ParagraphList::const_iterator par = paragraphs.constIterator(pit);
// check first if this is an higher depth paragraph.
bool go_out = (par->params().depth() < current_depth);
if (par->params().depth() == current_depth) {
// This environment is finished.
go_out |= (par->layout() != current_layout);
go_out |= (par->params().leftIndent() != current_left_indent);
}
if (go_out) {
// nothing to do here, restore pit and go out.
pit--;
break;
}
if (par->layout() == current_layout
&& par->params().depth() == current_depth
&& par->params().leftIndent() == current_left_indent) {
// We are still in the same environment so TeXOnePar and continue;
TeXOnePar(buf, text, pit, os, runparams);
continue;
}
// We are now in a deeper environment.
// Either par->layout() != current_layout
// Or par->params().depth() > current_depth
// Or par->params().leftIndent() != current_left_indent)
if (par->layout().isParagraph()) {
// FIXME (Lgb): How to handle this?
//&& !suffixIs(os, "\n\n")
// (ARRae) There should be at least one '\n' already but we need there to
// be two for Standard paragraphs that are depth-increment'ed to be
// output correctly. However, tables can also be paragraphs so
// don't adjust them.
//
// FIXME (Lgb): Will it ever harm to have one '\n' too
// many? i.e. that we sometimes will have
// three in a row.
os << '\n';
}
// FIXME This test should not be necessary.
// We should perhaps issue an error if it is.
bool const force_plain_layout = text.inset().forcePlainLayout();
Layout const & style = force_plain_layout
? buf.params().documentClass().plainLayout()
: par->layout();
if (!style.isEnvironment()) {
// This is a standard paragraph, no need to call TeXEnvironment.
TeXOnePar(buf, text, pit, os, runparams);
continue;
}
// This is a new environment.
TeXEnvironmentData const data =
prepareEnvironment(buf, text, par, os, runparams);
// Recursive call to TeXEnvironment!
TeXEnvironment(buf, text, runparams, pit, os);
finishEnvironment(os, runparams, data);
}
if (pit != runparams.par_end)
LYXERR(Debug::LATEX, "TeXEnvironment for paragraph " << par_begin << " done.");
}
} // namespace anon
void latexArgInsets(Paragraph const & par, otexstream & os,
OutputParams const & runparams, unsigned int reqargs,
unsigned int optargs)
{
unsigned int totalargs = reqargs + optargs;
list<InsetArgument const *> ilist;
InsetList::const_iterator it = par.insetList().begin();
InsetList::const_iterator end = par.insetList().end();
for (; it != end; ++it) {
if (it->inset->lyxCode() == ARG_CODE) {
if (ilist.size() >= totalargs) {
LYXERR0("WARNING: Found extra argument inset.");
continue;
}
InsetArgument const * ins =
static_cast<InsetArgument const *>(it->inset);
ilist.push_back(ins);
}
}
if (!reqargs && ilist.size() == 0)
return;
bool const have_optional_args = ilist.size() > reqargs;
if (have_optional_args) {
unsigned int todo = ilist.size() - reqargs;
for (unsigned int i = 0; i < todo; ++i) {
InsetArgument const * ins = ilist.front();
ilist.pop_front();
ins->latexArgument(os, runparams, true);
}
}
// we should now have no more insets than there are required
// arguments.
LASSERT(ilist.size() <= reqargs, /* */);
if (!reqargs)
return;
for (unsigned int i = 0; i < reqargs; ++i) {
if (ilist.empty())
// a required argument wasn't given, so we output {}
os << "{}";
else {
InsetArgument const * ins = ilist.front();
ilist.pop_front();
ins->latexArgument(os, runparams, false);
}
}
}
namespace {
// output the proper paragraph start according to latextype.
void parStartCommand(Paragraph const & par, otexstream & os,
OutputParams const & runparams, Layout const & style)
{
switch (style.latextype) {
case LATEX_COMMAND:
os << '\\' << from_ascii(style.latexname());
// Separate handling of optional argument inset.
if (style.optargs != 0 || style.reqargs != 0)
latexArgInsets(par, os, runparams, style.reqargs, style.optargs);
else
os << from_ascii(style.latexparam());
break;
case LATEX_ITEM_ENVIRONMENT:
case LATEX_LIST_ENVIRONMENT:
os << "\\item ";
break;
case LATEX_BIB_ENVIRONMENT:
// ignore this, the inset will write itself
break;
default:
break;
}
}
} // namespace anon
// FIXME: this should be anonymous
void TeXOnePar(Buffer const & buf,
Text const & text,
pit_type pit,
otexstream & os,
OutputParams const & runparams_in,
string const & everypar,
int start_pos, int end_pos)
{
BufferParams const & bparams = buf.params();
ParagraphList const & paragraphs = text.paragraphs();
Paragraph const & par = paragraphs.at(pit);
// FIXME This check should not really be needed.
// Perhaps we should issue an error if it is.
Layout const style = text.inset().forcePlainLayout() ?
bparams.documentClass().plainLayout() : par.layout();
if (style.inpreamble)
return;
LYXERR(Debug::LATEX, "TeXOnePar for paragraph " << pit << " ptr " << &par << " '"
<< everypar << "'");
OutputParams runparams = runparams_in;
runparams.isLastPar = (pit == pit_type(paragraphs.size() - 1));
// We reinitialze par begin and end to be on the safe side
// with embedded inset as we don't know if they set those
// value correctly.
runparams.par_begin = 0;
runparams.par_end = 0;
bool const maintext = text.isMainText();
// we are at the beginning of an inset and CJK is already open;
// we count inheritation levels to get the inset nesting right.
if (pit == 0 && !maintext
&& (cjk_inherited_ > 0 || open_encoding_ == CJK)) {
cjk_inherited_ += 1;
open_encoding_ = none;
}
if (text.inset().getLayout().isPassThru()) {
Font const outerfont = text.outerFont(pit);
// No newline before first paragraph in this lyxtext
if (pit > 0) {
os << '\n';
if (!text.inset().getLayout().parbreakIsNewline())
os << '\n';
}
par.latex(bparams, outerfont, os, runparams, start_pos, end_pos);
return;
}
Paragraph const * nextpar = runparams.isLastPar
? 0 : &paragraphs.at(pit + 1);
if (style.pass_thru) {
Font const outerfont = text.outerFont(pit);
parStartCommand(par, os, runparams, style);
par.latex(bparams, outerfont, os, runparams, start_pos, end_pos);
// I did not create a parEndCommand for this minuscule
// task because in the other user of parStartCommand
// the code is different (JMarc)
if (style.isCommand())
os << "}\n";
else
os << '\n';
if (!style.parbreak_is_newline) {
os << '\n';
} else if (nextpar) {
Layout const nextstyle = text.inset().forcePlainLayout()
? bparams.documentClass().plainLayout()
: nextpar->layout();
if (nextstyle.name() != style.name())
os << '\n';
}
return;
}
// This paragraph's language
Language const * const par_language = par.getParLanguage(bparams);
// The document's language
Language const * const doc_language = bparams.language;
// The language that was in effect when the environment this paragraph is
// inside of was opened
Language const * const outer_language =
(runparams.local_font != 0) ?
runparams.local_font->language() : doc_language;
Paragraph const * priorpar = (pit == 0) ? 0 : &paragraphs.at(pit - 1);
// The previous language that was in effect is the language of the
// previous paragraph, unless the previous paragraph is inside an
// environment with nesting depth greater than (or equal to, but with
// a different layout) the current one. If there is no previous
// paragraph, the previous language is the outer language.
bool const use_prev_env_language = prev_env_language_ != 0
&& priorpar
&& priorpar->layout().isEnvironment()
&& (priorpar->getDepth() > par.getDepth()
|| (priorpar->getDepth() == par.getDepth()
&& priorpar->layout() != par.layout()));
Language const * const prev_language =
(pit != 0)
? (use_prev_env_language ? prev_env_language_
: priorpar->getParLanguage(bparams))
: outer_language;
bool const use_pg = runparams.use_polyglossia;
string const par_lang = use_pg ?
getPolyglossiaEnvName(par_language): par_language->babel();
string const prev_lang = use_pg ?
getPolyglossiaEnvName(prev_language) : prev_language->babel();
string const doc_lang = use_pg ?
getPolyglossiaEnvName(doc_language) : doc_language->babel();
string const outer_lang = use_pg ?
getPolyglossiaEnvName(outer_language) : outer_language->babel();
string const lang_begin_command = use_pg ?
"\\begin{$$lang}" : lyxrc.language_command_begin;
string const lang_end_command = use_pg ?
"\\end{$$lang}" : lyxrc.language_command_end;
if (par_lang != prev_lang
// check if we already put language command in TeXEnvironment()
&& !(style.isEnvironment()
&& (pit == 0 || (priorpar->layout() != par.layout()
&& priorpar->getDepth() <= par.getDepth())
|| priorpar->getDepth() < par.getDepth())))
{
if (!lang_end_command.empty() &&
prev_lang != outer_lang &&
!prev_lang.empty())
{
os << from_ascii(subst(lang_end_command,
"$$lang",
prev_lang))
// the '%' is necessary to prevent unwanted whitespace
<< "%\n";
}
// We need to open a new language if we couldn't close the previous
// one (because there's no language_command_end); and even if we closed
// the previous one, if the current language is different than the
// outer_language (which is currently in effect once the previous one
// is closed).
if ((lang_end_command.empty() || par_lang != outer_lang)
&& !par_lang.empty()) {
// If we're inside an inset, and that inset is within an \L or \R
// (or equivalents), then within the inset, too, any opposite
// language paragraph should appear within an \L or \R (in addition
// to, outside of, the normal language switch commands).
// This behavior is not correct for ArabTeX, though.
if (!runparams.use_polyglossia
// not for ArabTeX
&& par_language->lang() != "arabic_arabtex"
&& outer_language->lang() != "arabic_arabtex"
// are we in an inset?
&& runparams.local_font != 0
// is the inset within an \L or \R?
//
// FIXME: currently, we don't check this; this means that
// we'll have unnnecessary \L and \R commands, but that
// doesn't seem to hurt (though latex will complain)
//
// is this paragraph in the opposite direction?
&& runparams.local_font->isRightToLeft() != par_language->rightToLeft()) {
// FIXME: I don't have a working copy of the Arabi package, so
// I'm not sure if the farsi and arabic_arabi stuff is correct
// or not...
if (par_language->lang() == "farsi")
os << "\\textFR{";
else if (outer_language->lang() == "farsi")
os << "\\textLR{";
else if (par_language->lang() == "arabic_arabi")
os << "\\textAR{";
else if (outer_language->lang() == "arabic_arabi")
os << "\\textLR{";
// remaining RTL languages currently is hebrew
else if (par_language->rightToLeft())
os << "\\R{";
else
os << "\\L{";
}
// With CJK, the CJK tag has to be closed first (see below)
if (runparams.encoding->package() != Encoding::CJK) {
os << from_ascii(subst(
lang_begin_command,
"$$lang",
par_lang));
if (runparams.use_polyglossia
&& !par_language->polyglossiaOpts().empty())
os << "["
<< from_ascii(par_language->polyglossiaOpts())
<< "]";
// the '%' is necessary to prevent unwanted whitespace
os << "%\n";
}
}
}
// Switch file encoding if necessary; no need to do this for "default"
// encoding, since this only affects the position of the outputted
// \inputencoding command; the encoding switch will occur when necessary
if (bparams.inputenc == "auto"
&& runparams.encoding->package() != Encoding::none) {
// Look ahead for future encoding changes.
// We try to output them at the beginning of the paragraph,
// since the \inputencoding command is not allowed e.g. in
// sections. For this reason we only set runparams.moving_arg
// after checking for the encoding change, otherwise the
// change would be always avoided by switchEncoding().
for (pos_type i = 0; i < par.size(); ++i) {
char_type const c = par.getChar(i);
Encoding const * const encoding =
par.getFontSettings(bparams, i).language()->encoding();
if (encoding->package() != Encoding::CJK
&& runparams.encoding->package() == Encoding::inputenc
&& c < 0x80)
continue;
if (par.isInset(i))
break;
// All characters before c are in the ASCII range, and
// c is non-ASCII (but no inset), so change the
// encoding to that required by the language of c.
// With CJK, only add switch if we have CJK content at the beginning
// of the paragraph
if (i != 0 && encoding->package() == Encoding::CJK)
continue;
pair<bool, int> enc_switch = switchEncoding(os.os(),
bparams, runparams, *encoding);
// the following is necessary after a CJK environment in a multilingual
// context (nesting issue).
if (par_language->encoding()->package() == Encoding::CJK
&& open_encoding_ != CJK && cjk_inherited_ == 0) {
os << "\\begin{CJK}{" << from_ascii(par_language->encoding()->latexName())
<< "}{" << from_ascii(bparams.fonts_cjk) << "}%\n";
open_encoding_ = CJK;
}
if (encoding->package() != Encoding::none && enc_switch.first) {
if (enc_switch.second > 0) {
// the '%' is necessary to prevent unwanted whitespace
os << "%\n";
}
// With CJK, the CJK tag had to be closed first (see above)
if (runparams.encoding->package() == Encoding::CJK) {
os << from_ascii(subst(
lang_begin_command,
"$$lang",
par_lang))
// the '%' is necessary to prevent unwanted whitespace
<< "%\n";
}
runparams.encoding = encoding;
}
break;
}
}
runparams.moving_arg |= style.needprotect;
Encoding const * const prev_encoding = runparams.encoding;
bool const useSetSpace = bparams.documentClass().provides("SetSpace");
if (par.allowParagraphCustomization()) {
if (par.params().startOfAppendix()) {
os << "\\appendix\n";
}
if (!par.params().spacing().isDefault()
&& (pit == 0 || !priorpar->hasSameLayout(par)))
{
os << from_ascii(par.params().spacing().writeEnvirBegin(useSetSpace))
<< '\n';
}
if (style.isCommand()) {
os << '\n';
}
}
parStartCommand(par, os, runparams, style);
Font const outerfont = text.outerFont(pit);
// FIXME UNICODE
os << from_utf8(everypar);
par.latex(bparams, outerfont, os, runparams, start_pos, end_pos);
// Make sure that \\par is done with the font of the last
// character if this has another size as the default.
// This is necessary because LaTeX (and LyX on the screen)
// calculates the space between the baselines according
// to this font. (Matthias)
//
// Is this really needed ? (Dekel)
// We do not need to use to change the font for the last paragraph
// or for a command.
Font const font = par.empty()
? par.getLayoutFont(bparams, outerfont)
: par.getFont(bparams, par.size() - 1, outerfont);
bool const is_command = style.isCommand();
if (style.resfont.size() != font.fontInfo().size()
&& nextpar
&& !is_command) {
os << '{';
os << "\\" << from_ascii(font.latexSize()) << " \\par}";
} else if (is_command) {
os << '}';
if (runparams.encoding != prev_encoding) {
runparams.encoding = prev_encoding;
if (!runparams.isFullUnicode())
os << setEncoding(prev_encoding->iconvName());
}
}
bool pending_newline = false;
bool unskip_newline = false;
switch (style.latextype) {
case LATEX_ITEM_ENVIRONMENT:
case LATEX_LIST_ENVIRONMENT:
if (nextpar && (par.params().depth() < nextpar->params().depth()))
pending_newline = true;
break;
case LATEX_ENVIRONMENT: {
// if its the last paragraph of the current environment
// skip it otherwise fall through
if (nextpar
&& (nextpar->layout() != par.layout()
|| nextpar->params().depth() != par.params().depth()))
break;
}
// fall through possible
default:
// we don't need it for the last paragraph!!!
if (nextpar)
pending_newline = true;
}
if (par.allowParagraphCustomization()) {
if (!par.params().spacing().isDefault()
&& (runparams.isLastPar || !nextpar->hasSameLayout(par))) {
if (pending_newline)
os << '\n';
os << from_ascii(par.params().spacing().writeEnvirEnd(useSetSpace));
pending_newline = true;
}
}
// 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 = !runparams.use_polyglossia
// 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?
&&((nextpar && par_language->babel() != (nextpar->getParLanguage(bparams))->babel())
|| (runparams.isLastPar && par_language->babel() != outer_language->babel()));
if (closing_rtl_ltr_environment
|| (runparams.isLastPar && 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.
if (pending_newline)
os << '\n';
// when the paragraph uses CJK, the language has to be closed earlier
if (font.language()->encoding()->package() != Encoding::CJK) {
if (lang_end_command.empty()) {
// If this is a child, we should restore the
// master language after the last paragraph.
Language const * const current_language =
(runparams.isLastPar && runparams.master_language)
? runparams.master_language
: outer_language;
string const current_lang = runparams.use_polyglossia
? getPolyglossiaEnvName(current_language)
: current_language->babel();
if (!current_lang.empty()) {
os << from_ascii(subst(
lang_begin_command,
"$$lang",
current_lang));
pending_newline = true;
unskip_newline = true;
}
} else if (!par_lang.empty()) {
os << from_ascii(subst(
lang_end_command,
"$$lang",
par_lang));
pending_newline = true;
unskip_newline = true;
}
}
}
if (closing_rtl_ltr_environment)
os << "}";
if (pending_newline) {
if (unskip_newline)
// prevent unwanted whitespace
os << '%';
os << '\n';
}
// if this is a CJK-paragraph and the next isn't, close CJK
// also if the next paragraph is a multilingual environment (because of nesting)
if (nextpar
&& open_encoding_ == CJK
&& (nextpar->getParLanguage(bparams)->encoding()->package() != Encoding::CJK
|| (nextpar->layout().isEnvironment() && nextpar->isMultiLingual(bparams)))
// inbetween environments, CJK has to be closed later (nesting!)
&& (!style.isEnvironment() || !nextpar->layout().isEnvironment())) {
os << "\\end{CJK}\n";
open_encoding_ = none;
}
// If this is the last paragraph, close the CJK environment
// if necessary. If it's an environment, we'll have to \end that first.
if (runparams.isLastPar && !style.isEnvironment()) {
switch (open_encoding_) {
case CJK: {
// do nothing at the end of child documents
if (maintext && buf.masterBuffer() != &buf)
break;
// end of main text
if (maintext) {
os << "\n\\end{CJK}\n";
// end of an inset
} else
os << "\\end{CJK}";
open_encoding_ = none;
break;
}
case inputenc: {
os << "\\egroup";
open_encoding_ = none;
break;
}
case none:
default:
// do nothing
break;
}
}
// If this is the last paragraph, and a local_font was set upon entering
// the inset, and we're using "auto" or "default" encoding, the encoding
// should be set back to that local_font's encoding.
// However, do not change the encoding when a fully unicode aware backend
// such as XeTeX is used.
if (runparams.isLastPar && runparams_in.local_font != 0
&& runparams_in.encoding != runparams_in.local_font->language()->encoding()
&& (bparams.inputenc == "auto" || bparams.inputenc == "default")
&& (!runparams.isFullUnicode())) {
runparams_in.encoding = runparams_in.local_font->language()->encoding();
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 a newline for the last paragraph!!!
// Note from JMarc: we will re-add a \n explicitly in
// TeXEnvironment, because it is needed in this case
if (nextpar) {
Layout const & next_layout = nextpar->layout();
if (style == next_layout
// no blank lines before environments!
|| !next_layout.isEnvironment()
// unless there's a depth change
// FIXME What we really want to do here is put every \begin and \end
// tag on a new line (which was not the case with nested environments).
// But in the present state of play, we don't have access to the
// information whether the current TeX row is empty or not.
// For some ideas about how to fix this, see this thread:
// http://www.mail-archive.com/lyx-devel@lists.lyx.org/msg145787.html
|| nextpar->params().depth() != par.params().depth()) {
os << '\n';
}
}
LYXERR(Debug::LATEX, "TeXOnePar for paragraph " << pit << " done; ptr "
<< &par << " next " << nextpar);
return;
}
// LaTeX all paragraphs
void latexParagraphs(Buffer const & buf,
Text const & text,
otexstream & os,
OutputParams const & runparams,
string const & everypar)
{
BufferParams const & bparams = buf.params();
bool const maintext = text.isMainText();
bool const is_child = buf.masterBuffer() != &buf;
// Open a CJK environment at the beginning of the main buffer
// if the document's language is a CJK language
// (but not in child documents)
if (maintext && !is_child
&& bparams.encoding().package() == Encoding::CJK) {
os << "\\begin{CJK}{" << from_ascii(bparams.encoding().latexName())
<< "}{" << from_ascii(bparams.fonts_cjk) << "}%\n";
open_encoding_ = CJK;
}
// if "auto begin" is switched off, explicitly switch the
// language on at start
string const mainlang = runparams.use_polyglossia
? getPolyglossiaEnvName(bparams.language)
: bparams.language->babel();
string const lang_begin_command = runparams.use_polyglossia ?
"\\begin{$$lang}" : lyxrc.language_command_begin;
if (maintext && !lyxrc.language_auto_begin &&
!mainlang.empty()) {
// FIXME UNICODE
os << from_utf8(subst(lang_begin_command,
"$$lang",
mainlang));
if (runparams.use_polyglossia
&& !bparams.language->polyglossiaOpts().empty())
os << "["
<< from_ascii(bparams.language->polyglossiaOpts())
<< "]";
os << '\n';
}
ParagraphList const & paragraphs = text.paragraphs();
LASSERT(runparams.par_begin <= runparams.par_end, /**/);
if (runparams.par_begin == runparams.par_end) {
// The full doc will be exported but it is easier to just rely on
// runparams range parameters that will be passed TeXEnvironment.
runparams.par_begin = 0;
runparams.par_end = paragraphs.size();
}
pit_type pit = runparams.par_begin;
// lastpit is for the language check after the loop.
pit_type lastpit = pit;
// variables used in the loop:
bool was_title = false;
bool already_title = false;
DocumentClass const & tclass = bparams.documentClass();
for (; pit < runparams.par_end; ++pit) {
lastpit = pit;
ParagraphList::const_iterator par = paragraphs.constIterator(pit);
// FIXME This check should not be needed. We should
// perhaps issue an error if it is.
Layout const & layout = text.inset().forcePlainLayout() ?
tclass.plainLayout() : par->layout();
if (layout.intitle) {
if (already_title) {
LYXERR0("Error in latexParagraphs: You"
" should not mix title layouts"
" with normal ones.");
} else if (!was_title) {
was_title = true;
if (tclass.titletype() == TITLE_ENVIRONMENT) {
os << "\\begin{"
<< from_ascii(tclass.titlename())
<< "}\n";
}
}
} else if (was_title && !already_title) {
if (tclass.titletype() == TITLE_ENVIRONMENT) {
os << "\\end{" << from_ascii(tclass.titlename())
<< "}\n";
}
else {
os << "\\" << from_ascii(tclass.titlename())
<< "\n";
}
already_title = true;
was_title = false;
}
if (!layout.isEnvironment() && par->params().leftIndent().zero()) {
// This is a standard top level paragraph, TeX it and continue.
TeXOnePar(buf, text, pit, os, runparams, everypar);
continue;
}
TeXEnvironmentData const data =
prepareEnvironment(buf, text, par, os, runparams);
// pit can be changed in TeXEnvironment.
TeXEnvironment(buf, text, runparams, pit, os);
finishEnvironment(os, runparams, data);
}
if (pit == runparams.par_end) {
// Make sure that the last paragraph is
// correctly terminated (because TeXOnePar does
// not add a \n in this case)
//os << '\n';
}
// It might be that we only have a title in this document
if (was_title && !already_title) {
if (tclass.titletype() == TITLE_ENVIRONMENT) {
os << "\\end{" << from_ascii(tclass.titlename())
<< "}\n";
} else {
os << "\\" << from_ascii(tclass.titlename())
<< "\n";
}
}
// if "auto end" is switched off, explicitly close the language at the end
// but only if the last par is in a babel language
string const lang_end_command = runparams.use_polyglossia ?
"\\end{$$lang}" : lyxrc.language_command_end;
if (maintext && !lyxrc.language_auto_end && !mainlang.empty() &&
paragraphs.at(lastpit).getParLanguage(bparams)->encoding()->package() != Encoding::CJK) {
os << from_utf8(subst(lang_end_command,
"$$lang",
mainlang))
<< '\n';
}
// If the last paragraph is an environment, we'll have to close
// CJK at the very end to do proper nesting.
if (maintext && !is_child && open_encoding_ == CJK) {
os << "\\end{CJK}\n";
open_encoding_ = none;
}
// reset inherited encoding
if (cjk_inherited_ > 0) {
cjk_inherited_ -= 1;
if (cjk_inherited_ == 0)
open_encoding_ = CJK;
}
}
pair<bool, int> switchEncoding(odocstream & os, BufferParams const & bparams,
OutputParams const & runparams, Encoding const & newEnc,
bool force)
{
Encoding const & oldEnc = *runparams.encoding;
bool moving_arg = runparams.moving_arg;
if (!force && ((bparams.inputenc != "auto" && bparams.inputenc != "default")
|| moving_arg))
return make_pair(false, 0);
// Do nothing if the encoding is unchanged.
if (oldEnc.name() == newEnc.name())
return make_pair(false, 0);
// FIXME We ignore encoding switches from/to encodings that do
// neither support the inputenc package nor the CJK package here.
// This does of course only work in special cases (e.g. switch from
// tis620-0 to latin1, but the text in latin1 contains ASCII only),
// but it is the best we can do
if (oldEnc.package() == Encoding::none
|| newEnc.package() == Encoding::none)
return make_pair(false, 0);
LYXERR(Debug::LATEX, "Changing LaTeX encoding from "
<< oldEnc.name() << " to " << newEnc.name());
os << setEncoding(newEnc.iconvName());
if (bparams.inputenc == "default")
return make_pair(true, 0);
docstring const inputenc_arg(from_ascii(newEnc.latexName()));
switch (newEnc.package()) {
case Encoding::none:
case Encoding::japanese:
// shouldn't ever reach here, see above
return make_pair(true, 0);
case Encoding::inputenc: {
int count = inputenc_arg.length();
if (oldEnc.package() == Encoding::CJK &&
open_encoding_ == CJK) {
os << "\\end{CJK}";
open_encoding_ = none;
count += 9;
}
else if (oldEnc.package() == Encoding::inputenc &&
open_encoding_ == inputenc) {
os << "\\egroup";
open_encoding_ = none;
count += 7;
}
if (runparams.local_font != 0
&& oldEnc.package() == Encoding::CJK) {
// within insets, \inputenc switches need
// to be embraced within \bgroup...\egroup;
// else CJK fails.
os << "\\bgroup";
count += 7;
open_encoding_ = inputenc;
}
// with the japanese option, inputenc is omitted.
if (runparams.use_japanese)
return make_pair(true, count);
os << "\\inputencoding{" << inputenc_arg << '}';
return make_pair(true, count + 16);
}
case Encoding::CJK: {
int count = inputenc_arg.length();
if (oldEnc.package() == Encoding::CJK &&
open_encoding_ == CJK) {
os << "\\end{CJK}";
count += 9;
}
if (oldEnc.package() == Encoding::inputenc &&
open_encoding_ == inputenc) {
os << "\\egroup";
count += 7;
}
os << "\\begin{CJK}{" << inputenc_arg << "}{"
<< from_ascii(bparams.fonts_cjk) << "}";
open_encoding_ = CJK;
return make_pair(true, count + 15);
}
}
// Dead code to avoid a warning:
return make_pair(true, 0);
}
} // namespace lyx
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