void InsetPreview::preparePreview(DocIterator const & pos) const
{
TexRow texrow;
odocstringstream str;
otexstream os(str, texrow);
OutputParams runparams(&pos.buffer()->params().encoding());
latex(os, runparams);
docstring const snippet = str.str();
preview_->addPreview(snippet, *pos.buffer());
}
void PreviewLoader::Impl::dumpPreamble(otexstream & os) const
{
// Dump the preamble only.
OutputParams runparams(&buffer_.params().encoding());
if (buffer_.params().useNonTeXFonts)
runparams.flavor = OutputParams::XETEX;
else
runparams.flavor = OutputParams::LATEX;
runparams.nice = true;
runparams.moving_arg = true;
runparams.free_spacing = true;
buffer_.writeLaTeXSource(os, buffer_.filePath(), runparams, Buffer::OnlyPreamble);
// FIXME! This is a HACK! The proper fix is to control the 'true'
// passed to WriteStream below:
// int InsetMathNest::latex(Buffer const &, odocstream & os,
// OutputParams const & runparams) const
// {
// WriteStream wi(os, runparams.moving_arg, true);
// par_->write(wi);
// return wi.line();
// }
os << "\n"
<< "\\def\\lyxlock{}\n"
<< "\n";
// All equation labels appear as "(#)" + preview.sty's rendering of
// the label name
if (lyxrc.preview_hashed_labels)
os << "\\renewcommand{\\theequation}{\\#}\n";
// Use the preview style file to ensure that each snippet appears on a
// fresh page.
// Also support PDF output (automatically generated e.g. when
// \usepackage[pdftex]{hyperref} is used and XeTeX.
os << "\n"
<< "\\usepackage[active,delayed,showlabels,lyx]{preview}\n"
<< "\n";
}
void PreviewLoader::Impl::startLoading(bool wait)
{
if (pending_.empty() || !pconverter_)
return;
// Only start the process off after the buffer is loaded from file.
if (!buffer_.isFullyLoaded())
return;
LYXERR(Debug::GRAPHICS, "PreviewLoader::startLoading()");
// As used by the LaTeX file and by the resulting image files
string const directory = buffer_.temppath();
string const filename_base = unique_filename(directory);
// Create an InProgress instance to place in the map of all
// such processes if it starts correctly.
InProgress inprogress(filename_base, pending_, pconverter_->to);
// clear pending_, so we're ready to start afresh.
pending_.clear();
// Output the LaTeX file.
FileName const latexfile(filename_base + ".tex");
// we use the encoding of the buffer
Encoding const & enc = buffer_.params().encoding();
ofdocstream of;
try { of.reset(enc.iconvName()); }
catch (iconv_codecvt_facet_exception const & e) {
LYXERR0("Caught iconv exception: " << e.what()
<< "\nUnable to create LaTeX file: " << latexfile);
return;
}
TexRow texrow;
otexstream os(of, texrow);
OutputParams runparams(&enc);
LaTeXFeatures features(buffer_, buffer_.params(), runparams);
if (!openFileWrite(of, latexfile))
return;
if (!of) {
LYXERR(Debug::GRAPHICS, "PreviewLoader::startLoading()\n"
<< "Unable to create LaTeX file\n" << latexfile);
return;
}
of << "\\batchmode\n";
dumpPreamble(os);
// handle inputenc etc.
buffer_.params().writeEncodingPreamble(os, features);
of << "\n\\begin{document}\n";
dumpData(of, inprogress.snippets);
of << "\n\\end{document}\n";
of.close();
if (of.fail()) {
LYXERR(Debug::GRAPHICS, "PreviewLoader::startLoading()\n"
<< "File was not closed properly.");
return;
}
double const font_scaling_factor =
buffer_.isExporting() ? 75.0 * buffer_.params().html_math_img_scale
: 0.01 * lyxrc.dpi * lyxrc.zoom * lyxrc.preview_scale_factor;
// FIXME XHTML
// The colors should be customizable.
ColorCode const bg = buffer_.isExporting()
? Color_white : PreviewLoader::backgroundColor();
ColorCode const fg = buffer_.isExporting()
? Color_black : PreviewLoader::foregroundColor();
// The conversion command.
ostringstream cs;
cs << pconverter_->command
<< " " << quoteName(latexfile.toFilesystemEncoding())
<< " --dpi " << int(font_scaling_factor)
<< " --fg " << theApp()->hexName(fg)
<< " --bg " << theApp()->hexName(bg);
// FIXME what about LuaTeX?
if (buffer_.params().useNonTeXFonts)
cs << " --latex=xelatex";
if (buffer_.params().encoding().package() == Encoding::japanese)
cs << " --latex=platex";
if (buffer_.params().bibtex_command != "default")
cs << " --bibtex=" << quoteName(buffer_.params().bibtex_command);
else if (buffer_.params().encoding().package() == Encoding::japanese)
cs << " --bibtex=" << quoteName(lyxrc.jbibtex_command);
else
cs << " --bibtex=" << quoteName(lyxrc.bibtex_command);
if (buffer_.params().bufferFormat() == "lilypond-book")
cs << " --lilypond";
string const command = libScriptSearch(cs.str());
if (wait) {
ForkedCall call(buffer_.filePath());
int ret = call.startScript(ForkedProcess::Wait, command);
static int fake = (2^20) + 1;
int pid = fake++;
inprogress.pid = pid;
inprogress.command = command;
in_progress_[pid] = inprogress;
finishedGenerating(pid, ret);
return;
}
// Initiate the conversion from LaTeX to bitmap images files.
ForkedCall::SignalTypePtr
convert_ptr(new ForkedCall::SignalType);
convert_ptr->connect(bind(&Impl::finishedGenerating, this, _1, _2));
ForkedCall call(buffer_.filePath());
int ret = call.startScript(command, convert_ptr);
if (ret != 0) {
LYXERR(Debug::GRAPHICS, "PreviewLoader::startLoading()\n"
<< "Unable to start process\n" << command);
return;
}
// Store the generation process in a list of all such processes
inprogress.pid = call.pid();
inprogress.command = command;
in_progress_[inprogress.pid] = inprogress;
}
