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lyx_mirror/src/output_latex.cpp
Juergen Spitzmueller 5b374e0c29 do not output empty language switch commands (bug #8216)
2012-06-24 10:56:08 +02:00

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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_polyglossia = runparams.use_polyglossia;
string const par_lang = use_polyglossia ?
getPolyglossiaEnvName(data.par_language) : data.par_language->babel();
string const prev_par_lang = use_polyglossia ?
getPolyglossiaEnvName(prev_par_language) : prev_par_language->babel();
string const doc_lang = use_polyglossia ?
getPolyglossiaEnvName(doc_language) : doc_language->babel();
string const lang_begin_command = use_polyglossia ?
"\\begin{$$lang}" : lyxrc.language_command_begin;
string const lang_end_command = use_polyglossia ?
"\\end{$$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 (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.empty())
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_polyglossia = runparams.use_polyglossia;
string const par_lang = use_polyglossia ?
getPolyglossiaEnvName(par_language): par_language->babel();
string const prev_lang = use_polyglossia ?
getPolyglossiaEnvName(prev_language) : prev_language->babel();
string const doc_lang = use_polyglossia ?
getPolyglossiaEnvName(doc_language) : doc_language->babel();
string const outer_lang = use_polyglossia ?
getPolyglossiaEnvName(outer_language) : outer_language->babel();
string const lang_begin_command = use_polyglossia ?
"\\begin{$$lang}" : lyxrc.language_command_begin;
string const lang_end_command = use_polyglossia ?
"\\end{$$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,
"$$lang",
prev_lang))
// the '%' is necessary to prevent unwanted whitespace
<< "%\n";
}
// We need to open a new language if we couldn't close the previous
// one (because there's no language_command_end); and even if we closed
// the previous one, if the current language is different than the
// outer_language (which is currently in effect once the previous one
// is closed).
if ((lang_end_command.empty() || par_lang != outer_lang)
&& !par_lang.empty()) {
// If we're inside an inset, and that inset is within an \L or \R
// (or equivalents), then within the inset, too, any opposite
// language paragraph should appear within an \L or \R (in addition
// to, outside of, the normal language switch commands).
// This behavior is not correct for ArabTeX, though.
if (!use_polyglossia
// not for ArabTeX
&& par_language->lang() != "arabic_arabtex"
&& outer_language->lang() != "arabic_arabtex"
// are we in an inset?
&& runparams.local_font != 0
// is the inset within an \L or \R?
//
// FIXME: currently, we don't check this; this means that
// we'll have unnnecessary \L and \R commands, but that
// doesn't seem to hurt (though latex will complain)
//
// is this paragraph in the opposite direction?
&& runparams.local_font->isRightToLeft() != par_language->rightToLeft()) {
// FIXME: I don't have a working copy of the Arabi package, so
// I'm not sure if the farsi and arabic_arabi stuff is correct
// or not...
if (par_language->lang() == "farsi")
os << "\\textFR{";
else if (outer_language->lang() == "farsi")
os << "\\textLR{";
else if (par_language->lang() == "arabic_arabi")
os << "\\textAR{";
else if (outer_language->lang() == "arabic_arabi")
os << "\\textLR{";
// remaining RTL languages currently is hebrew
else if (par_language->rightToLeft())
os << "\\R{";
else
os << "\\L{";
}
// With CJK, the CJK tag has to be closed first (see below)
if (runparams.encoding->package() != Encoding::CJK
&& !par_lang.empty()) {
os << from_ascii(subst(
lang_begin_command,
"$$lang",
par_lang));
if (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
&& !par_lang.empty()) {
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 = !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
&& ((!use_polyglossia && par_language->babel() != outer_language->babel())
|| (use_polyglossia && par_language->polyglossia() != outer_language->polyglossia())))) {
// 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 = 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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