lyx_mirror/src/insets/InsetListings.cpp
Jean-Marc Lasgouttes fff28c5756 Always qualify calls to std::move()
This quashes a new warning in clang++ 15, when std::move() (the
one-parameter version) is used as simply move(). There is a strong
recommendation from WG21 to avoid that.

Details here: https://reviews.llvm.org/D119670

It might be that we should not use that many move()s. I am not
competent to decide on that.

I also used this occasion to get rid of a spacial casing for C++11
that does not seem necessary after all.
2022-10-21 14:11:36 +02:00

716 lines
22 KiB
C++

/**
* \file InsetListings.cpp
* This file is part of LyX, the document processor.
* Licence details can be found in the file COPYING.
*
* \author Bo Peng
* \author Jürgen Spitzmüller
*
* Full author contact details are available in file CREDITS.
*/
#include <config.h>
#include "InsetListings.h"
#include "Buffer.h"
#include "BufferView.h"
#include "BufferParams.h"
#include "Cursor.h"
#include "Encoding.h"
#include "FuncRequest.h"
#include "FuncStatus.h"
#include "InsetCaption.h"
#include "InsetLabel.h"
#include "InsetLayout.h"
#include "Language.h"
#include "LaTeXFeatures.h"
#include "Lexer.h"
#include "output_latex.h"
#include "output_docbook.h"
#include "output_xhtml.h"
#include "TexRow.h"
#include "texstream.h"
#include "support/debug.h"
#include "support/docstream.h"
#include "support/gettext.h"
#include "support/lstrings.h"
#include "support/lassert.h"
#include "frontends/alert.h"
#include "frontends/Application.h"
#include <cstring>
#include <regex>
#include <sstream>
using namespace std;
using namespace lyx::support;
namespace lyx {
InsetListings::InsetListings(Buffer * buf, InsetListingsParams const & par)
: InsetCaptionable(buf,"listing")
{
params_.setMinted(buffer().params().use_minted);
status_ = par.status();
}
InsetListings::~InsetListings()
{
hideDialogs("listings", this);
}
int InsetListings::rowFlags() const
{
return params().isInline() || params().isFloat() ? Inline : Display | AlignLeft;
}
docstring InsetListings::layoutName() const
{
if (buffer().params().use_minted)
return from_ascii("MintedListings");
else
return from_ascii("Listings");
}
void InsetListings::write(ostream & os) const
{
os << "listings" << "\n";
InsetListingsParams const & par = params();
// parameter string is encoded to be a valid lyx token.
string opt = par.encodedString();
if (!opt.empty())
os << "lstparams \"" << opt << "\"\n";
if (par.isInline())
os << "inline true\n";
else
os << "inline false\n";
InsetCaptionable::write(os);
}
void InsetListings::read(Lexer & lex)
{
while (lex.isOK()) {
lex.next();
string token = lex.getString();
if (token == "lstparams") {
lex.next();
string const value = lex.getString();
params().fromEncodedString(value);
} else if (token == "inline") {
lex.next();
params().setInline(lex.getBool());
} else {
// no special option, push back 'status' etc
lex.pushToken(token);
break;
}
}
InsetCaptionable::read(lex);
}
Encoding const * InsetListings::forcedEncoding(Encoding const * inner_enc,
Encoding const * outer_enc) const
{
// The listings package cannot deal with multi-byte-encoded
// glyphs, except for Xe/LuaTeX (with non-TeX fonts) or pLaTeX.
// Minted can deal with all encodings.
if (buffer().params().use_minted
|| inner_enc->name() == "utf8-plain"
|| inner_enc->package() == Encoding::japanese
|| inner_enc->hasFixedWidth())
return 0;
// We try if there's a singlebyte encoding for the outer
// language; if not, fall back to latin1.
// Power-users can set inputenc to utf8-plain to bypass this workaround
// and provide alternatives in the user-preamble.
return (outer_enc->hasFixedWidth()) ?
outer_enc : encodings.fromLyXName("iso8859-1");
}
void InsetListings::latex(otexstream & os, OutputParams const & runparams) const
{
string param_string = params().params();
// NOTE: I use {} to quote text, which is an experimental feature
// of the listings package (see page 25 of the manual)
bool const isInline = params().isInline();
bool const use_minted = buffer().params().use_minted;
static regex const reg1("(.*)(basicstyle=\\{)([^\\}]*)(\\\\ttfamily)([^\\}]*)(\\})(.*)");
static regex const reg2("(.*)(basicstyle=\\{)([^\\}]*)(\\\\rmfamily)([^\\}]*)(\\})(.*)");
static regex const reg3("(.*)(basicstyle=\\{)([^\\}]*)(\\\\sffamily)([^\\}]*)(\\})(.*)");
static regex const reg4("(.*)(basicstyle=\\{)([^\\}]*)(\\\\(tiny|scriptsize|footnotesize|small|normalsize|large|Large))([^\\}]*)(\\})(.*)");
static regex const reg5("(.*)(fontfamily=)(tt|sf|rm)(.*)");
static regex const reg6("(.*)(fontsize=\\{)(\\\\(tiny|scriptsize|footnotesize|small|normalsize|large|Large))(\\})(.*)");
if (use_minted) {
// If params have been entered with "listings", and then the user switched to "minted",
// we have params that need to be translated.
// FIXME: We should use a backend-abstract syntax in listings params instead!
// Substitute fontstyle option
smatch sub;
if (regex_match(param_string, sub, reg1))
param_string = sub.str(1) + "fontfamily=tt," + sub.str(2) + sub.str(3)
+ sub.str(5) + sub.str(6) + sub.str(7);
if (regex_match(param_string, sub, reg2))
param_string = sub.str(1) + "fontfamily=rm," + sub.str(2) + sub.str(3)
+ sub.str(5) + sub.str(6) + sub.str(7);
if (regex_match(param_string, sub, reg3))
param_string = sub.str(1) + "fontfamily=sf," + sub.str(2) + sub.str(3)
+ sub.str(5) + sub.str(6) + sub.str(7);
// as well as fontsize option
if (regex_match(param_string, sub, reg4))
param_string = sub.str(1) + "fontsize={" + sub.str(4) + sub.str(3) + sub.str(7) + sub.str(8);
} else {
// And the same vice versa
// Substitute fontstyle option
smatch sub;
string basicstyle;
if (regex_match(param_string, sub, reg5)) {
basicstyle = "\\" + sub.str(3) + "family";
param_string = sub.str(1) + sub.str(4);
}
// as well as fontsize option
if (regex_match(param_string, sub, reg6)) {
basicstyle += sub.str(3);
param_string = sub.str(1) + sub.str(6);
}
if (!basicstyle.empty())
param_string = rtrim(param_string, ",") + ",basicstyle={" + basicstyle + "}";
}
if (runparams.use_polyglossia && runparams.local_font->isRightToLeft()) {
// We need to use the *latin switches (#11554)
smatch sub;
if (regex_match(param_string, sub, reg1))
param_string = sub.str(1) + sub.str(2) + sub.str(3) + sub.str(4)
+ "latin" + sub.str(5) + sub.str(6) + sub.str(7);
if (regex_match(param_string, sub, reg2))
param_string = sub.str(1) + sub.str(2) + sub.str(3) + sub.str(4)
+ "latin" + sub.str(5) + sub.str(6) + sub.str(7);
if (regex_match(param_string, sub, reg3))
param_string = sub.str(1) + sub.str(2) + sub.str(3) + sub.str(4)
+ "latin" + sub.str(5) + sub.str(6) + sub.str(7);
}
string minted_language;
string float_placement;
bool const isfloat = params().isFloat();
if (use_minted && (isfloat || contains(param_string, "language="))) {
// Get float placement and/or language of the code,
// then remove the relative options.
vector<string> opts =
getVectorFromString(param_string, ",", false);
for (size_t i = 0; i < opts.size(); ++i) {
if (prefixIs(opts[i], "float")) {
if (prefixIs(opts[i], "float="))
float_placement = opts[i].substr(6);
opts.erase(opts.begin() + int(i--));
}
else if (prefixIs(opts[i], "language=")) {
minted_language = opts[i].substr(9);
opts.erase(opts.begin() + int(i--));
}
}
param_string = getStringFromVector(opts, ",");
}
// Minted needs a language specification
if (minted_language.empty()) {
// If a language has been set globally, use that,
// otherwise use TeX by default
string const & blp = buffer().params().listings_params;
size_t start = blp.find("language=");
if (start != string::npos) {
start += strlen("language=");
size_t len = blp.find(",", start);
if (len != string::npos)
len -= start;
minted_language = blp.substr(start, len);
} else
minted_language = "TeX";
}
// get the paragraphs. We can not output them directly to given odocstream
// because we can not yet determine the delimiter character of \lstinline
docstring code;
docstring uncodable;
ParagraphList::const_iterator par = paragraphs().begin();
ParagraphList::const_iterator end = paragraphs().end();
bool encoding_switched = false;
Encoding const * const save_enc = runparams.encoding;
Encoding const * const outer_encoding =
(runparams.local_font != 0) ?
runparams.local_font->language()->encoding()
: buffer().params().language->encoding();
Encoding const * fixedlstenc = forcedEncoding(runparams.encoding, outer_encoding);
if (fixedlstenc) {
// We need to switch to a singlebyte encoding, due to
// the restrictions of the listings package (see above).
// This needs to be consistent with
// LaTeXFeatures::getTClassI18nPreamble().
// We need to put this into a group in order to prevent encoding leaks
// (happens with cprotect).
os << "\\bgroup";
switchEncoding(os.os(), buffer().params(), runparams, *fixedlstenc, true);
runparams.encoding = fixedlstenc;
encoding_switched = true;
}
bool const captionfirst = !isfloat && par->isInset(0)
&& par->getInset(0)->lyxCode() == CAPTION_CODE;
while (par != end) {
pos_type const siz = par->size();
bool captionline = false;
for (pos_type i = 0; i < siz; ++i) {
if (i == 0 && par->isInset(i) && i + 1 == siz)
captionline = true;
// ignore all struck out text and (caption) insets
if (par->isDeleted(i)
|| (par->isInset(i) && par->getInset(i)->lyxCode() == CAPTION_CODE))
continue;
if (par->isInset(i)) {
// Currently, this can only be a quote inset
// that is output as plain quote here, but
// we use more generic code anyway.
otexstringstream ots;
OutputParams rp = runparams;
rp.pass_thru = true;
par->getInset(i)->latex(ots, rp);
code += ots.str();
continue;
}
char_type c = par->getChar(i);
// we can only output characters covered by the current
// encoding!
try {
if (runparams.encoding->encodable(c))
code += c;
else if (runparams.dryrun) {
code += "<" + _("LyX Warning: ")
+ _("uncodable character") + " '";
code += docstring(1, c);
code += "'>";
} else
uncodable += c;
} catch (EncodingException & /* e */) {
if (runparams.dryrun) {
code += "<" + _("LyX Warning: ")
+ _("uncodable character") + " '";
code += docstring(1, c);
code += "'>";
} else
uncodable += c;
}
}
++par;
// Add new line between paragraphs in displayed listings.
// Exception: merged paragraphs in change tracking mode.
// Also, for the inline case, if there are multiple paragraphs
// they are simply joined. Otherwise, expect latex errors.
if (par != end && !isInline && !captionline && !par->parEndChange().deleted())
code += "\n";
}
if (isInline) {
static const docstring delimiters =
from_utf8("!*()-=+|;:'\"`,<.>/?QWERTYUIOPASDFGHJKLZXCVBNMqwertyuiopasdfghjklzxcvbnm");
size_t pos = delimiters.find_first_not_of(code);
// This code piece contains all possible special character? !!!
// Replace ! with a warning message and use ! as delimiter.
if (pos == string::npos) {
docstring delim_error = "<" + _("LyX Warning: ")
+ _("no more lstline delimiters available") + ">";
code = subst(code, from_ascii("!"), delim_error);
pos = 0;
if (!runparams.dryrun && !runparams.silent) {
// FIXME: warning should be passed to the error dialog
frontend::Alert::warning(_("Running out of delimiters"),
_("For inline program listings, one character must be reserved\n"
"as a delimiter. One of the listings, however, uses all available\n"
"characters, so none is left for delimiting purposes.\n"
"For the time being, I have replaced '!' by a warning, but you\n"
"must investigate!"));
}
}
docstring const delim(1, delimiters[pos]);
if (use_minted) {
os << "\\mintinline";
if (!param_string.empty())
os << "[" << from_utf8(param_string) << "]";
os << "{" << ascii_lowercase(minted_language) << "}";
} else {
os << "\\lstinline";
if (!param_string.empty())
os << "[" << from_utf8(param_string) << "]";
else if (pos >= delimiters.find('Q'))
// We need to terminate the command before
// the delimiter
os << " ";
}
os << delim << code << delim;
} else if (use_minted) {
OutputParams rp = runparams;
rp.moving_arg = true;
TexString caption = getCaption(rp);
if (isfloat) {
os << breakln << "\\begin{listing}";
if (!float_placement.empty())
os << '[' << float_placement << "]";
} else if (captionfirst && !caption.str.empty()) {
os << breakln << "\\lyxmintcaption[t]{"
<< std::move(caption) << "}\n";
}
os << breakln << "\\begin{minted}";
if (!param_string.empty())
os << "[" << param_string << "]";
os << "{" << ascii_lowercase(minted_language) << "}\n"
<< code << breakln << "\\end{minted}\n";
if (isfloat) {
if (!caption.str.empty())
os << "\\caption{" << std::move(caption) << "}\n";
os << "\\end{listing}\n";
} else if (!captionfirst && !caption.str.empty()) {
os << breakln << "\\lyxmintcaption[b]{"
<< std::move(caption) << "}";
}
} else {
OutputParams rp = runparams;
rp.moving_arg = true;
TexString caption = getCaption(rp);
os << breakln << "\\begin{lstlisting}";
if (param_string.empty() && caption.str.empty())
os << "\n";
else {
if (!runparams.nice)
os << safebreakln;
os << "[";
if (!caption.str.empty()) {
os << "caption={" << std::move(caption) << '}';
if (!param_string.empty())
os << ',';
}
os << from_utf8(param_string) << "]\n";
}
os << code << breakln << "\\end{lstlisting}\n";
}
if (encoding_switched){
// Switch back
switchEncoding(os.os(), buffer().params(),
runparams, *save_enc, true, true);
os << "\\egroup" << breakln;
runparams.encoding = save_enc;
}
if (!uncodable.empty() && !runparams.silent) {
// issue a warning about omitted characters
// FIXME: should be passed to the error dialog
if (fixedlstenc)
frontend::Alert::warning(_("Uncodable characters in listings inset"),
bformat(_("The following characters in one of the program listings are\n"
"not representable in the current encoding and have been omitted:\n%1$s.\n"
"This is due to a restriction of the listings package, which does\n"
"not support your encoding '%2$s'.\n"
"Toggling 'Use non-TeX fonts' in Document > Settings...\n"
"might help."),
uncodable, _(runparams.encoding->guiName())));
else
frontend::Alert::warning(_("Uncodable characters in listings inset"),
bformat(_("The following characters in one of the program listings are\n"
"not representable in the current encoding and have been omitted:\n%1$s."),
uncodable));
}
}
docstring InsetListings::xhtml(XMLStream & os, OutputParams const & rp) const
{
odocstringstream ods;
XMLStream out(ods);
bool const isInline = params().isInline();
if (isInline)
out << xml::CompTag("br");
else {
out << xml::StartTag("div", "class='float-listings'");
docstring caption = getCaptionHTML(rp);
if (!caption.empty())
out << xml::StartTag("div", "class='listings-caption'")
<< XMLStream::ESCAPE_NONE
<< caption << xml::EndTag("div");
}
InsetLayout const & il = getLayout();
string const & tag = il.htmltag();
string attr = "class ='listings";
string const lang = params().getParamValue("language");
if (!lang.empty())
attr += " " + lang;
attr += "'";
out << xml::StartTag(tag, attr);
OutputParams newrp = rp;
newrp.html_disable_captions = true;
// We don't want to convert dashes here. That's the only conversion we
// do for XHTML, so this is safe.
newrp.pass_thru = true;
docstring def = InsetText::insetAsXHTML(out, newrp, InsetText::JustText);
out << xml::EndTag(tag);
if (isInline) {
out << xml::CompTag("br");
// escaping will already have been done
os << XMLStream::ESCAPE_NONE << ods.str();
} else {
out << xml::EndTag("div");
// In this case, this needs to be deferred, but we'll put it
// before anything the text itself deferred.
def = ods.str() + '\n' + def;
}
return def;
}
void InsetListings::docbook(XMLStream & xs, OutputParams const & rp) const
{
InsetLayout const & il = getLayout();
bool isInline = params().isInline();
if (!isInline && !xs.isLastTagCR())
xs << xml::CR();
// In case of caption, the code must be wrapped, for instance in a figure. Also detect if there is a label.
// http://www.sagehill.net/docbookxsl/ProgramListings.html
// TODO: parts of this code could be merged with InsetFloat and findLabelInParagraph.
InsetCaption const * caption = getCaptionInset();
if (caption) {
InsetLabel const * label = getLabelInset();
// Ensure that the label will not be output a second time as an anchor.
OutputParams rpNoLabel = rp;
if (label)
rpNoLabel.docbook_anchors_to_ignore.emplace(label->screenLabel());
// Prepare the right set of attributes, including the label.
docstring attr = from_ascii("type='listing'");
if (label)
attr += " xml:id=\"" + xml::cleanID(label->screenLabel()) + "\"";
// Finally, generate the wrapper (including the label).
xs << xml::StartTag("figure", attr);
xs << xml::CR();
xs << xml::StartTag("title");
xs << XMLStream::ESCAPE_NONE << getCaptionDocBook(rpNoLabel);
xs << xml::EndTag("title");
xs << xml::CR();
}
// Forge the attributes.
std::string attrs;
if (!il.docbookattr().empty())
attrs += " role=\"" + il.docbookattr() + "\"";
std::string const lang = params().getParamValue("language");
if (!lang.empty())
attrs += " language=\"" + lang + "\"";
// Determine the tag to use. Use the layout-defined value if outside a paragraph.
std::string tag = il.docbooktag();
if (isInline)
tag = "code";
// Start the listing.
xs << xml::StartTag(tag, attrs);
xs.startDivision(false);
// Deal with the content of the listing.
OutputParams newrp = rp;
newrp.pass_thru = true;
newrp.docbook_make_pars = false;
newrp.par_begin = 0;
newrp.par_end = text().paragraphs().size();
newrp.docbook_in_listing = true;
docbookParagraphs(text(), buffer(), xs, newrp);
// Done with the listing.
xs.endDivision();
xs << xml::EndTag(tag);
if (!isInline)
xs << xml::CR();
if (caption) {
xs << xml::EndTag("figure");
xs << xml::CR();
}
}
string InsetListings::contextMenuName() const
{
return "context-listings";
}
void InsetListings::doDispatch(Cursor & cur, FuncRequest & cmd)
{
switch (cmd.action()) {
case LFUN_INSET_MODIFY: {
cur.recordUndoInset(this);
InsetListings::string2params(to_utf8(cmd.argument()), params());
break;
}
case LFUN_INSET_DIALOG_UPDATE:
cur.bv().updateDialog("listings", params2string(params()));
break;
default:
InsetCaptionable::doDispatch(cur, cmd);
break;
}
}
bool InsetListings::getStatus(Cursor & cur, FuncRequest const & cmd,
FuncStatus & status) const
{
switch (cmd.action()) {
case LFUN_INSET_MODIFY:
case LFUN_INSET_DIALOG_UPDATE:
status.setEnabled(true);
return true;
case LFUN_CAPTION_INSERT: {
// the inset outputs at most one caption
if (params().isInline() || getCaptionInset()) {
status.setEnabled(false);
return true;
}
}
// fall through
default:
return InsetCaptionable::getStatus(cur, cmd, status);
}
}
docstring const InsetListings::buttonLabel(BufferView const & bv) const
{
// FIXME UNICODE
docstring const locked = tempfile_ ? docstring(1, 0x1F512) : docstring();
if (decoration() == InsetDecoration::CLASSIC)
return locked + (isOpen(bv) ? _("Listing") : getNewLabel(_("Listing")));
return locked + getNewLabel(_("Listing"));
}
void InsetListings::validate(LaTeXFeatures & features) const
{
features.useInsetLayout(getLayout());
string param_string = params().params();
if (buffer().params().use_minted) {
features.require("minted");
OutputParams rp = features.runparams();
if (!params().isFloat() && !getCaption(rp).str.empty())
features.require("lyxmintcaption");
if (features.usePolyglossia() && features.hasRTLLanguage())
// minted loads color, but color must be loaded before bidi
// (i.e., polyglossia)
features.require("color");
} else {
features.require("listings");
if (contains(param_string, "\\color"))
features.require("color");
}
InsetCaptionable::validate(features);
}
bool InsetListings::showInsetDialog(BufferView * bv) const
{
bv->showDialog("listings", params2string(params()),
const_cast<InsetListings *>(this));
return true;
}
TexString InsetListings::getCaption(OutputParams const & runparams) const
{
InsetCaption const * ins = getCaptionInset();
if (ins == 0)
return TexString();
otexstringstream os;
ins->getArgs(os, runparams);
ins->getArgument(os, runparams);
// TODO: The code below should be moved to support, and then the test
// in ../tests should be moved there as well.
// the caption may contain \label{} but the listings
// package prefer caption={}, label={}
TexString cap = os.release();
if (buffer().params().use_minted
|| !contains(cap.str, from_ascii("\\label{")))
return cap;
// convert from
// blah1\label{blah2} blah3
// to
// blah1 blah3},label={blah2
// to form options
// caption={blah1 blah3},label={blah2}
//
// NOTE that } is not allowed in blah2.
regex const reg("(.*)\\\\label\\{(.*?)\\}(.*)");
string const new_cap("$1$3},label={$2");
// Remove potential \protect'ion of \label.
docstring capstr = subst(cap.str, from_ascii("\\protect\\label"),
from_ascii("\\label"));
// TexString validity: the substitution preserves the number of newlines.
// Moreover we assume that $2 does not contain newlines, so that the texrow
// information remains accurate.
// Replace '\n' with an improbable character from Private Use Area-A
// and then return to '\n' after the regex replacement.
capstr = subst(capstr, char_type('\n'), 0xffffd);
cap.str = subst(from_utf8(regex_replace(to_utf8(capstr), reg, new_cap)),
0xffffd, char_type('\n'));
return cap;
}
void InsetListings::string2params(string const & in,
InsetListingsParams & params)
{
params = InsetListingsParams();
if (in.empty())
return;
istringstream data(in);
Lexer lex;
lex.setStream(data);
// discard "listings", which is only used to determine inset
lex.next();
params.read(lex);
}
string InsetListings::params2string(InsetListingsParams const & params)
{
ostringstream data;
data << "listings" << ' ';
params.write(data);
return data.str();
}
} // namespace lyx