brkstr2str_pos: avoid case where length is negative

[features.git] / src / output_latex.cpp

diff --git a/src/output_latex.cpp b/src/output_latex.cpp
index 4589b3795b1368a10c90d8f92e4b8abf0e90fcae..ac22116976d7cf8cbb08b0b7ed91802637dc1a78 100644 (file)
--- a/src/output_latex.cpp
+++ b/src/output_latex.cpp
@@ -185,8 +185,9 @@ static TeXEnvironmentData prepareEnvironment(Buffer const & buf,
                bparams.documentClass().plainLayout() : pit->layout();
 
        ParagraphList const & paragraphs = text.paragraphs();
+       bool const firstpar = pit == paragraphs.begin();
        ParagraphList::const_iterator const priorpit =
-               pit == paragraphs.begin() ? pit : prev(pit, 1);
+               firstpar ? pit : prev(pit, 1);
 
        OutputState * state = getOutputState();
        bool const use_prev_env_language = state->prev_env_language_ != nullptr
@@ -199,10 +200,13 @@ static TeXEnvironmentData prepareEnvironment(Buffer const & buf,
        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 ? state->prev_env_language_
-                                        : priorpit->getParLanguage(bparams))
-               : doc_language;
+               // use font at inset or document language in first paragraph
+               firstpar ? (runparams.local_font ?
+                                   runparams.local_font->language()
+                                 : doc_language)
+                        : (use_prev_env_language ?
+                                   state->prev_env_language_
+                                 : priorpit->getParLanguage(bparams));
 
        bool const use_polyglossia = runparams.use_polyglossia;
        string const par_lang = use_polyglossia ?
@@ -219,11 +223,14 @@ static TeXEnvironmentData prepareEnvironment(Buffer const & buf,
                                        !lang_end_command.empty();
 
        // For polyglossia, switch language outside of environment, if possible.
+       // However, if we are at the start of an inset, do not close languages
+       // opened outside.
        if (par_lang != prev_par_lang) {
-               if ((!using_begin_end || langOpenedAtThisLevel(state)) &&
-                   !lang_end_command.empty() &&
-                   prev_par_lang != doc_lang &&
-                   !prev_par_lang.empty()) {
+               if (!firstpar
+                   && (!using_begin_end || langOpenedAtThisLevel(state))
+                   && !lang_end_command.empty()
+                   && prev_par_lang != doc_lang
+                   && !prev_par_lang.empty()) {
                        os << from_ascii(subst(
                                lang_end_command,
                                "$$lang",
@@ -320,10 +327,12 @@ static TeXEnvironmentData prepareEnvironment(Buffer const & buf,
 
 
 static void finishEnvironment(otexstream & os, OutputParams const & runparams,
-                             TeXEnvironmentData const & data)
+                             TeXEnvironmentData const & data, bool const maintext,
+                             bool const lastpar)
 {
        OutputState * state = getOutputState();
-       // BufferParams const & bparams = buf.params(); // FIXME: for speedup shortcut below, would require passing of "buf" as argument
+       // BufferParams const & bparams = buf.params();
+       // FIXME: for speedup shortcut below, would require passing of "buf" as argument
        if (state->open_encoding_ == CJK && data.cjk_nested) {
                // We need to close the encoding even if it does not change
                // to do correct environment nesting
@@ -363,6 +372,20 @@ static void finishEnvironment(otexstream & os, OutputParams const & runparams,
                        runparams.encoding = data.prev_encoding;
                        os << setEncoding(data.prev_encoding->iconvName());
                }
+               // If this is the last par of an inset, the language needs
+               // to be closed after the environment
+               if (lastpar && !maintext) {
+                       if (using_begin_end && langOpenedAtThisLevel(state)) {
+                               if (isLocalSwitch(state)) {
+                                       os << "}";
+                               } else {
+                                       os << "\\end{"
+                                          << openLanguageName(state)
+                                          << "}%\n";
+                               }
+                               popLanguageName();
+                       }
+               }
        }
 
        if (data.leftindent_open) {
@@ -462,7 +485,8 @@ void TeXEnvironment(Buffer const & buf, Text const & text,
                        prepareEnvironment(buf, text, par, os, runparams);
                // Recursive call to TeXEnvironment!
                TeXEnvironment(buf, text, runparams, pit, os);
-               finishEnvironment(os, runparams, data);
+               bool const lastpar = size_t(pit + 1) >= paragraphs.size();
+               finishEnvironment(os, runparams, data, text.isMainText(), lastpar);
        }
 
        if (pit != runparams.par_end)
@@ -1676,7 +1700,8 @@ void latexParagraphs(Buffer const & buf,
                        output_changes = bparams.output_changes;
                else
                        output_changes = (runparams.for_searchAdv == OutputParams::SearchWithDeleted);
-               if (size_t(pit + 1) < paragraphs.size()) {
+               bool const lastpar = size_t(pit + 1) >= paragraphs.size();
+               if (!lastpar) {
                        ParagraphList::const_iterator nextpar = paragraphs.iterator_at(pit + 1);
                        Paragraph const & cpar = paragraphs.at(pit);
                        if ((par->layout() != nextpar->layout()
@@ -1703,7 +1728,7 @@ void latexParagraphs(Buffer const & buf,
                        prepareEnvironment(buf, text, par, os, runparams);
                // pit can be changed in TeXEnvironment.
                TeXEnvironment(buf, text, runparams, pit, os);
-               finishEnvironment(os, runparams, data);
+               finishEnvironment(os, runparams, data, maintext, lastpar);
        }
 
        // FIXME: uncomment the content or remove this block