]> git.lyx.org Git - lyx.git/blobdiff - src/Buffer.cpp
Don't sort the bibfiles cache.
[lyx.git] / src / Buffer.cpp
index 7641741076553a6b9a3131f0bddf1acdeb12a44d..74d5ac8deb428621552f968fb5e24fd25b339aac 100644 (file)
@@ -55,6 +55,7 @@
 #include "ParagraphParameters.h"
 #include "ParIterator.h"
 #include "PDFOptions.h"
+#include "Session.h"
 #include "SpellChecker.h"
 #include "sgml.h"
 #include "texstream.h"
@@ -76,7 +77,7 @@
 
 #include "mathed/InsetMathHull.h"
 #include "mathed/MacroTable.h"
-#include "mathed/MathMacroTemplate.h"
+#include "mathed/InsetMathMacroTemplate.h"
 #include "mathed/MathSupport.h"
 
 #include "graphics/GraphicsCache.h"
@@ -91,6 +92,7 @@
 #include "support/debug.h"
 #include "support/docstring_list.h"
 #include "support/ExceptionMessage.h"
+#include "support/FileMonitor.h"
 #include "support/FileName.h"
 #include "support/FileNameList.h"
 #include "support/filetools.h"
@@ -135,7 +137,7 @@ int const LYX_FORMAT = LYX_FORMAT_LYX;
 typedef map<string, bool> DepClean;
 typedef map<docstring, pair<InsetLabel const *, Buffer::References> > RefCache;
 
-} // namespace anon
+} // namespace
 
 
 // A storehouse for the cloned buffers.
@@ -170,7 +172,7 @@ public:
        /** If we have branches that use the file suffix
            feature, return the file name with suffix appended.
        */
-       support::FileName exportFileName() const;
+       FileName exportFileName() const;
 
        Buffer * owner_;
 
@@ -263,9 +265,8 @@ public:
        /// Container for all sort of Buffer dependant errors.
        map<string, ErrorList> errorLists;
 
-       /// timestamp and checksum used to test if the file has been externally
-       /// modified. (Used to properly enable 'File->Revert to saved', bug 4114).
-       time_t timestamp_;
+       /// checksum used to test if the file has been externally modified.  Used to
+       /// double check whether the file had been externally modified when saving.
        unsigned long checksum_;
 
        ///
@@ -278,7 +279,7 @@ public:
 
        /// A cache for the bibfiles (including bibfiles of loaded child
        /// documents), needed for appropriate update of natbib labels.
-       mutable support::FileNamePairList bibfiles_cache_;
+       mutable FileNamePairList bibfiles_cache_;
 
        // FIXME The caching mechanism could be improved. At present, we have a
        // cache for each Buffer, that caches all the bibliography info for that
@@ -288,8 +289,6 @@ public:
        mutable BiblioInfo bibinfo_;
        /// whether the bibinfo cache is valid
        mutable bool bibinfo_cache_valid_;
-       /// whether the bibfile cache is valid
-       mutable bool bibfile_cache_valid_;
        /// Cache of timestamps of .bib files
        map<FileName, time_t> bibfile_status_;
        /// Indicates whether the bibinfo has changed since the last time
@@ -342,10 +341,8 @@ public:
                if (!cloned_buffer_ && parent_buffer && pb)
                        LYXERR0("Warning: a buffer should not have two parents!");
                parent_buffer = pb;
-               if (!cloned_buffer_ && parent_buffer) {
-                       parent_buffer->invalidateBibfileCache();
+               if (!cloned_buffer_ && parent_buffer)
                        parent_buffer->invalidateBibinfoCache();
-               }
        }
 
        /// If non zero, this buffer is a clone of existing buffer \p cloned_buffer_
@@ -376,6 +373,15 @@ public:
        // display the review toolbar, for instance)
        mutable bool tracked_changes_present_;
 
+       // Make sure the file monitor monitors the good file.
+       void refreshFileMonitor();
+
+       /// Notify or clear of external modification
+       void fileExternallyModified(bool exists);
+
+       /// has been externally modified? Can be reset by the user.
+       mutable bool externally_modified_;
+
 private:
        /// So we can force access via the accessors.
        mutable Buffer const * parent_buffer;
@@ -384,6 +390,7 @@ private:
        int char_count_;
        int blank_count_;
 
+       FileMonitorPtr file_monitor_;
 };
 
 
@@ -419,13 +426,15 @@ Buffer::Impl::Impl(Buffer * owner, FileName const & file, bool readonly_,
        : owner_(owner), lyx_clean(true), bak_clean(true), unnamed(false),
          internal_buffer(false), read_only(readonly_), filename(file),
          file_fully_loaded(false), file_format(LYX_FORMAT), need_format_backup(false),
-         ignore_parent(false),  toc_backend(owner), macro_lock(false), timestamp_(0),
+         ignore_parent(false),  toc_backend(owner), macro_lock(false),
          checksum_(0), wa_(0),  gui_(0), undo_(*owner), bibinfo_cache_valid_(false),
-         bibfile_cache_valid_(false), cite_labels_valid_(false), preview_error_(false),
+         cite_labels_valid_(false), preview_error_(false),
          inset(0), preview_loader_(0), cloned_buffer_(cloned_buffer),
-         clone_list_(0), doing_export(false), parent_buffer(0),
+         clone_list_(0), doing_export(false),
+         tracked_changes_present_(0), externally_modified_(false), parent_buffer(0),
          word_count_(0), char_count_(0), blank_count_(0)
 {
+       refreshFileMonitor();
        if (!cloned_buffer_) {
                temppath = createBufferTmpDir();
                lyxvc.setBuffer(owner_);
@@ -439,7 +448,6 @@ Buffer::Impl::Impl(Buffer * owner, FileName const & file, bool readonly_,
        bibfiles_cache_ = cloned_buffer_->d->bibfiles_cache_;
        bibinfo_ = cloned_buffer_->d->bibinfo_;
        bibinfo_cache_valid_ = cloned_buffer_->d->bibinfo_cache_valid_;
-       bibfile_cache_valid_ = cloned_buffer_->d->bibfile_cache_valid_;
        bibfile_status_ = cloned_buffer_->d->bibfile_status_;
        cite_labels_valid_ = cloned_buffer_->d->cite_labels_valid_;
        unnamed = cloned_buffer_->d->unnamed;
@@ -491,10 +499,8 @@ Buffer::~Buffer()
                // ourselves as a child.
                d->clone_list_->erase(this);
                // loop over children
-               Impl::BufferPositionMap::iterator it = d->children_positions.begin();
-               Impl::BufferPositionMap::iterator end = d->children_positions.end();
-               for (; it != end; ++it) {
-                       Buffer * child = const_cast<Buffer *>(it->first);
+               for (auto const & p : d->children_positions) {
+                       Buffer * child = const_cast<Buffer *>(p.first);
                                if (d->clone_list_->erase(child))
                                        delete child;
                }
@@ -520,21 +526,23 @@ Buffer::~Buffer()
                d->position_to_children.clear();
        } else {
                // loop over children
-               Impl::BufferPositionMap::iterator it = d->children_positions.begin();
-               Impl::BufferPositionMap::iterator end = d->children_positions.end();
-               for (; it != end; ++it) {
-                       Buffer * child = const_cast<Buffer *>(it->first);
-                       if (theBufferList().isLoaded(child)) { 
-                        if (theBufferList().isOthersChild(this, child))
-                                child->setParent(0);
-                        else
-                               theBufferList().release(child);
+               for (auto const & p : d->children_positions) {
+                       Buffer * child = const_cast<Buffer *>(p.first);
+                       if (theBufferList().isLoaded(child)) {
+                               if (theBufferList().isOthersChild(this, child))
+                                       child->setParent(0);
+                               else
+                                       theBufferList().release(child);
                        }
                }
 
                if (!isClean()) {
                        docstring msg = _("LyX attempted to close a document that had unsaved changes!\n");
-                       msg += emergencyWrite();
+                       try {
+                               msg += emergencyWrite();
+                       } catch (...) {
+                               msg += "  " + _("Save failed! Document is lost.");
+                       }
                        Alert::warning(_("Attempting to close changed document!"), msg);
                }
 
@@ -597,12 +605,10 @@ void Buffer::cloneWithChildren(BufferMap & bufmap, CloneList * clones) const
        // math macro caches need to be rethought and simplified.
        // I am not sure wether we should handle Buffer cloning here or in BufferList.
        // Right now BufferList knows nothing about buffer clones.
-       Impl::PositionScopeBufferMap::iterator it = d->position_to_children.begin();
-       Impl::PositionScopeBufferMap::iterator end = d->position_to_children.end();
-       for (; it != end; ++it) {
-               DocIterator dit = it->first.clone(buffer_clone);
+       for (auto const & p : d->position_to_children) {
+               DocIterator dit = p.first.clone(buffer_clone);
                dit.setBuffer(buffer_clone);
-               Buffer * child = const_cast<Buffer *>(it->second.buffer);
+               Buffer * child = const_cast<Buffer *>(p.second.buffer);
 
                child->cloneWithChildren(bufmap, clones);
                BufferMap::iterator const bit = bufmap.find(child);
@@ -695,10 +701,8 @@ BufferParams const & Buffer::masterParams() const
 
        BufferParams & mparams = const_cast<Buffer *>(masterBuffer())->params();
        // Copy child authors to the params. We need those pointers.
-       AuthorList const & child_authors = params().authors();
-       AuthorList::Authors::const_iterator it = child_authors.begin();
-       for (; it != child_authors.end(); ++it)
-               mparams.authors().record(*it);
+       for (Author const & a : params().authors())
+               mparams.authors().record(a);
        return mparams;
 }
 
@@ -706,7 +710,7 @@ BufferParams const & Buffer::masterParams() const
 double Buffer::fontScalingFactor() const
 {
        return isExporting() ? 75.0 * params().html_math_img_scale
-               : 0.01 * lyxrc.dpi * lyxrc.zoom * lyxrc.preview_scale_factor * params().display_pixel_ratio;
+               : 0.01 * lyxrc.dpi * lyxrc.currentZoom * lyxrc.preview_scale_factor * params().display_pixel_ratio;
 }
 
 
@@ -815,7 +819,7 @@ string Buffer::logName(LogType * type) const
        FileName const bname(
                addName(path, onlyFileName(
                        changeExtension(filename,
-                                       formats.extension(params().bufferFormat()) + ".out"))));
+                                       theFormats().extension(params().bufferFormat()) + ".out"))));
 
        // Also consider the master buffer log file
        FileName masterfname = fname;
@@ -863,6 +867,7 @@ void Buffer::setFileName(FileName const & fname)
 {
        bool const changed = fname != d->filename;
        d->filename = fname;
+       d->refreshFileMonitor();
        if (changed)
                lyxvc().file_found_hook(fname);
        setReadonly(d->filename.isReadOnly());
@@ -963,6 +968,8 @@ int Buffer::readHeader(Lexer & lex)
                errorList.push_back(ErrorItem(_("Document header error"), s));
        }
 
+       params().shell_escape = theSession().shellescapeFiles().find(absFileName());
+
        params().makeDocumentClass();
 
        return unknown_tokens;
@@ -1051,10 +1058,8 @@ bool Buffer::readDocument(Lexer & lex)
        // inform parent buffer about local macros
        if (parent()) {
                Buffer const * pbuf = parent();
-               UserMacroSet::const_iterator cit = usermacros.begin();
-               UserMacroSet::const_iterator end = usermacros.end();
-               for (; cit != end; ++cit)
-                       pbuf->usermacros.insert(*cit);
+               for (auto const & m : usermacros)
+                       pbuf->usermacros.insert(m);
        }
        usermacros.clear();
        updateMacros();
@@ -1065,13 +1070,12 @@ bool Buffer::readDocument(Lexer & lex)
 
 bool Buffer::importString(string const & format, docstring const & contents, ErrorList & errorList)
 {
-       Format const * fmt = formats.getFormat(format);
+       Format const * fmt = theFormats().getFormat(format);
        if (!fmt)
                return false;
        // It is important to use the correct extension here, since some
        // converters create a wrong output file otherwise (e.g. html2latex)
-       TempFile const tempfile("Buffer_importStringXXXXXX." + fmt->extension());
-       FileName const name(tempfile.name());
+       FileName const name = tempFileName("Buffer_importStringXXXXXX." + fmt->extension());
        ofdocstream os(name.toFilesystemEncoding().c_str());
        // Do not convert os implicitly to bool, since that is forbidden in C++11.
        bool const success = !(os << contents).fail();
@@ -1087,8 +1091,7 @@ bool Buffer::importString(string const & format, docstring const & contents, Err
                converted = importFile(format, name, errorList);
        }
 
-       if (name.exists())
-               name.removeFile();
+       removeTempFile(name);
        return converted;
 }
 
@@ -1098,10 +1101,14 @@ bool Buffer::importFile(string const & format, FileName const & name, ErrorList
        if (!theConverters().isReachable(format, "lyx"))
                return false;
 
-       TempFile const tempfile("Buffer_importFileXXXXXX.lyx");
-       FileName const lyx(tempfile.name());
-       if (theConverters().convert(0, name, lyx, name, format, "lyx", errorList))
-               return readFile(lyx) == ReadSuccess;
+       FileName const lyx = tempFileName("Buffer_importFileXXXXXX.lyx");
+       Converters::RetVal const retval =
+           theConverters().convert(0, name, lyx, name, format, "lyx", errorList);
+       if (retval == Converters::SUCCESS) {
+               bool const success = readFile(lyx) == ReadSuccess;
+               removeTempFile(lyx);
+               return success;
+       }
 
        return false;
 }
@@ -1179,7 +1186,7 @@ Buffer::ReadStatus Buffer::readFile(FileName const & fn)
 
        d->file_fully_loaded = true;
        d->read_only = !d->filename.isWritable();
-       params().compressed = formats.isZippedFile(d->filename);
+       params().compressed = theFormats().isZippedFile(d->filename);
        saveCheckSum();
        return ReadSuccess;
 }
@@ -1293,7 +1300,7 @@ Buffer::ReadStatus Buffer::convertLyXFormat(FileName const & fn,
        command << os::python()
                << ' ' << quoteName(lyx2lyx.toFilesystemEncoding())
                << " -t " << convert<string>(LYX_FORMAT)
-               << " -o " << quoteName(tmpfile.toFilesystemEncoding())
+               << " -o " << quoteName(tmpfile.toSafeFilesystemEncoding())
                << ' ' << quoteName(fn.toSafeFilesystemEncoding());
        string const command_str = command.str();
 
@@ -1374,7 +1381,7 @@ bool Buffer::save() const
        }
 
        // ask if the disk file has been externally modified (use checksum method)
-       if (fileName().exists() && isExternallyModified(checksum_method)) {
+       if (fileName().exists() && isChecksumModified()) {
                docstring text =
                        bformat(_("Document %1$s has been externally modified. "
                                "Are you sure you want to overwrite this file?"), file);
@@ -1389,12 +1396,12 @@ bool Buffer::save() const
 
        // if the file does not yet exist, none of the backup activity
        // that follows is necessary
-  if (!fileName().exists()) {
+       if (!fileName().exists()) {
                if (!writeFile(fileName()))
-      return false;
-    markClean();
-    return true;
-  }
+                       return false;
+               markClean();
+               return true;
+       }
 
        // we first write the file to a new name, then move it to its
        // proper location once that has been done successfully. that
@@ -1585,7 +1592,7 @@ docstring Buffer::emergencyWrite()
                return user_message;
        }
 
-       user_message += "  " + _("Save failed! Bummer. Document is lost.");
+       user_message += "  " + _("Save failed! Document is lost.");
        // Don't try again.
        markClean();
        return user_message;
@@ -1605,16 +1612,14 @@ bool Buffer::write(ostream & ofs) const
        // Important: Keep the version formatting in sync with lyx2lyx and
        //            tex2lyx (bug 7951)
        ofs << "#LyX " << lyx_version_major << "." << lyx_version_minor
-           << " created this file. For more info see http://www.lyx.org/\n"
+           << " created this file. For more info see https://www.lyx.org/\n"
            << "\\lyxformat " << LYX_FORMAT << "\n"
            << "\\begin_document\n";
 
        /// For each author, set 'used' to true if there is a change
        /// by this author in the document; otherwise set it to 'false'.
-       AuthorList::Authors::const_iterator a_it = params().authors().begin();
-       AuthorList::Authors::const_iterator a_end = params().authors().end();
-       for (; a_it != a_end; ++a_it)
-               a_it->setUsed(false);
+       for (Author const & a : params().authors())
+               a.setUsed(false);
 
        ParIterator const end = const_cast<Buffer *>(this)->par_iterator_end();
        ParIterator it = const_cast<Buffer *>(this)->par_iterator_begin();
@@ -1655,7 +1660,7 @@ bool Buffer::write(ostream & ofs) const
 }
 
 
-bool Buffer::makeLaTeXFile(FileName const & fname,
+Buffer::ExportStatus Buffer::makeLaTeXFile(FileName const & fname,
                           string const & original_path,
                           OutputParams const & runparams_in,
                           OutputWhat output) const
@@ -1679,14 +1684,14 @@ bool Buffer::makeLaTeXFile(FileName const & fname,
                Alert::error(_("Iconv software exception Detected"), bformat(_("Please "
                        "verify that the support software for your encoding (%1$s) is "
                        "properly installed"), from_ascii(encoding)));
-               return false;
+               return ExportError;
        }
        if (!openFileWrite(ofs, fname))
-               return false;
+               return ExportError;
 
        ErrorList & errorList = d->errorLists["Export"];
        errorList.clear();
-       bool failed_export = false;
+       ExportStatus status = ExportSuccess;
        otexstream os(ofs);
 
        // make sure we are ready to export
@@ -1696,31 +1701,45 @@ bool Buffer::makeLaTeXFile(FileName const & fname,
        updateBuffer();
        updateMacroInstances(OutputUpdate);
 
+       ExportStatus retval;
        try {
-               writeLaTeXSource(os, original_path, runparams, output);
+               retval = writeLaTeXSource(os, original_path, runparams, output);
+               if (retval == ExportKilled)
+                       return ExportKilled;
        }
        catch (EncodingException const & e) {
                docstring const failed(1, e.failed_char);
                ostringstream oss;
                oss << "0x" << hex << e.failed_char << dec;
-               docstring msg = bformat(_("Could not find LaTeX command for character '%1$s'"
-                                         " (code point %2$s)"),
-                                         failed, from_utf8(oss.str()));
-               errorList.push_back(ErrorItem(msg, _("Some characters of your document are probably not "
-                               "representable in the chosen encoding.\n"
-                               "Changing the document encoding to utf8 could help."),
-                                             {e.par_id, e.pos}, {e.par_id, e.pos + 1}));
-               failed_export = true;
+               if (getParFromID(e.par_id).paragraph().layout().pass_thru) {
+                       docstring msg = bformat(_("Uncodable character '%1$s'"
+                                                 " (code point %2$s)"),
+                                                 failed, from_utf8(oss.str()));
+                       errorList.push_back(ErrorItem(msg, _("Some characters of your document are not "
+                                       "representable in specific verbatim contexts.\n"
+                                       "Changing the document encoding to utf8 could help."),
+                                                     {e.par_id, e.pos}, {e.par_id, e.pos + 1}));
+               } else {
+                       docstring msg = bformat(_("Could not find LaTeX command for character '%1$s'"
+                                                 " (code point %2$s)"),
+                                                 failed, from_utf8(oss.str()));
+                       errorList.push_back(ErrorItem(msg, _("Some characters of your document are probably not "
+                                       "representable in the chosen encoding.\n"
+                                       "Changing the document encoding to utf8 could help."),
+                                                     {e.par_id, e.pos}, {e.par_id, e.pos + 1}));
+               }
+               status = ExportError;
        }
        catch (iconv_codecvt_facet_exception const & e) {
                errorList.push_back(ErrorItem(_("iconv conversion failed"),
                                              _(e.what())));
-               failed_export = true;
+               status = ExportError;
        }
        catch (exception const & e) {
                errorList.push_back(ErrorItem(_("conversion failed"),
                                              _(e.what())));
-               failed_export = true;
+               lyxerr << e.what() << endl;
+               status = ExportError;
        }
        catch (...) {
                lyxerr << "Caught some really weird exception..." << endl;
@@ -1731,7 +1750,7 @@ bool Buffer::makeLaTeXFile(FileName const & fname,
 
        ofs.close();
        if (ofs.fail()) {
-               failed_export = true;
+               status = ExportError;
                lyxerr << "File '" << fname << "' was not closed properly." << endl;
        }
 
@@ -1739,11 +1758,11 @@ bool Buffer::makeLaTeXFile(FileName const & fname,
                errorList.clear();
        else
                errors("Export");
-       return !failed_export;
+       return status;
 }
 
 
-void Buffer::writeLaTeXSource(otexstream & os,
+Buffer::ExportStatus Buffer::writeLaTeXSource(otexstream & os,
                           string const & original_path,
                           OutputParams const & runparams_in,
                           OutputWhat output) const
@@ -1762,6 +1781,9 @@ void Buffer::writeLaTeXSource(otexstream & os,
        //        (or not reached) and characters encodable in the current
        //        encoding are not converted to ASCII-representation.
 
+       // Some macros rely on font encoding
+       runparams.main_fontenc = params().main_font_encoding();
+
        // If we are compiling a file standalone, even if this is the
        // child of some other buffer, let's cut the link here, so the
        // file is really independent and no concurring settings from
@@ -1790,7 +1812,7 @@ void Buffer::writeLaTeXSource(otexstream & os,
        // first paragraph of the document. (Asger)
        if (output_preamble && runparams.nice) {
                os << "%% LyX " << lyx_version << " created this file.  "
-                       "For more info, see http://www.lyx.org/.\n"
+                       "For more info, see https://www.lyx.org/.\n"
                        "%% Do not edit unless you really know what "
                        "you are doing.\n";
        }
@@ -1834,7 +1856,7 @@ void Buffer::writeLaTeXSource(otexstream & os,
                        if (!uncodable_glyphs.empty()) {
                                frontend::Alert::warning(
                                        _("Uncodable character in file path"),
-                                       support::bformat(
+                                       bformat(
                                          _("The path of your document\n"
                                            "(%1$s)\n"
                                            "contains glyphs that are unknown "
@@ -1853,7 +1875,7 @@ void Buffer::writeLaTeXSource(otexstream & os,
                                          inputpath, uncodable_glyphs));
                        } else {
                                string docdir =
-                                       support::latex_path(original_path);
+                                       latex_path(original_path);
                                if (contains(docdir, '#')) {
                                        docdir = subst(docdir, "#", "\\#");
                                        os << "\\catcode`\\#=11"
@@ -1883,7 +1905,7 @@ void Buffer::writeLaTeXSource(otexstream & os,
                // Biblatex bibliographies are loaded here
                if (params().useBiblatex()) {
                        vector<docstring> const bibfiles =
-                               prepareBibFilePaths(runparams, getBibfilesCache(), true);
+                               prepareBibFilePaths(runparams, getBibfiles(), true);
                        for (docstring const & file: bibfiles)
                                os << "\\addbibresource{" << file << "}\n";
                }
@@ -1896,32 +1918,32 @@ void Buffer::writeLaTeXSource(otexstream & os,
                        vector<string> pll = features.getPolyglossiaExclusiveLanguages();
                        if (!bll.empty()) {
                                docstring langs;
-                               for (vector<string>::const_iterator it = bll.begin(); it != bll.end(); ++it) {
+                               for (string const & sit : bll) {
                                        if (!langs.empty())
                                                langs += ", ";
-                                       langs += _(*it);
+                                       langs += _(sit);
                                }
                                blangs = bll.size() > 1 ?
-                                           support::bformat(_("The languages %1$s are only supported by Babel."), langs)
-                                         : support::bformat(_("The language %1$s is only supported by Babel."), langs);
+                                           bformat(_("The languages %1$s are only supported by Babel."), langs)
+                                         : bformat(_("The language %1$s is only supported by Babel."), langs);
                        }
                        if (!pll.empty()) {
                                docstring langs;
-                               for (vector<string>::const_iterator it = pll.begin(); it != pll.end(); ++it) {
+                               for (string const & pit : pll) {
                                        if (!langs.empty())
                                                langs += ", ";
-                                       langs += _(*it);
+                                       langs += _(pit);
                                }
                                plangs = pll.size() > 1 ?
-                                           support::bformat(_("The languages %1$s are only supported by Polyglossia."), langs)
-                                         : support::bformat(_("The language %1$s is only supported by Polyglossia."), langs);
+                                           bformat(_("The languages %1$s are only supported by Polyglossia."), langs)
+                                         : bformat(_("The language %1$s is only supported by Polyglossia."), langs);
                                if (!blangs.empty())
-                                       plangs += "\n"; 
+                                       plangs += "\n";
                        }
 
                        frontend::Alert::warning(
                                _("Incompatible Languages!"),
-                               support::bformat(
+                               bformat(
                                  _("You cannot use the following languages "
                                    "together in one LaTeX document because "
                                    "they require conflicting language packages:\n"
@@ -1937,7 +1959,7 @@ void Buffer::writeLaTeXSource(otexstream & os,
                        // Restore the parenthood if needed
                        if (!runparams.is_child)
                                d->ignore_parent = false;
-                       return;
+                       return ExportSuccess;
                }
 
                // make the body.
@@ -1950,10 +1972,8 @@ void Buffer::writeLaTeXSource(otexstream & os,
                os.lastChar('\n');
 
                // output the parent macros
-               MacroSet::iterator it = parentMacros.begin();
-               MacroSet::iterator end = parentMacros.end();
-               for (; it != end; ++it) {
-                       int num_lines = (*it)->write(os.os(), true);
+               for (auto const & mac : parentMacros) {
+                       int num_lines = mac->write(os.os(), true);
                        os.texrow().newlines(num_lines);
                }
 
@@ -1962,7 +1982,10 @@ void Buffer::writeLaTeXSource(otexstream & os,
        LYXERR(Debug::INFO, "preamble finished, now the body.");
 
        // the real stuff
-       latexParagraphs(*this, text(), os, runparams);
+       try {
+               latexParagraphs(*this, text(), os, runparams);
+       }
+       catch (ConversionException const &) { return ExportKilled; }
 
        // Restore the parenthood if needed
        if (!runparams.is_child)
@@ -1981,10 +2004,11 @@ void Buffer::writeLaTeXSource(otexstream & os,
 
        LYXERR(Debug::INFO, "Finished making LaTeX file.");
        LYXERR(Debug::INFO, "Row count was " << os.texrow().rows() - 1 << '.');
+       return ExportSuccess;
 }
 
 
-void Buffer::makeDocBookFile(FileName const & fname,
+Buffer::ExportStatus Buffer::makeDocBookFile(FileName const & fname,
                              OutputParams const & runparams,
                              OutputWhat output) const
 {
@@ -1992,22 +2016,26 @@ void Buffer::makeDocBookFile(FileName const & fname,
 
        ofdocstream ofs;
        if (!openFileWrite(ofs, fname))
-               return;
+               return ExportError;
 
        // make sure we are ready to export
        // this needs to be done before we validate
        updateBuffer();
        updateMacroInstances(OutputUpdate);
 
-       writeDocBookSource(ofs, fname.absFileName(), runparams, output);
+       ExportStatus const retval =
+               writeDocBookSource(ofs, fname.absFileName(), runparams, output);
+       if (retval == ExportKilled)
+               return ExportKilled;
 
        ofs.close();
        if (ofs.fail())
                lyxerr << "File '" << fname << "' was not closed properly." << endl;
+       return ExportSuccess;
 }
 
 
-void Buffer::writeDocBookSource(odocstream & os, string const & fname,
+Buffer::ExportStatus Buffer::writeDocBookSource(odocstream & os, string const & fname,
                             OutputParams const & runparams,
                             OutputWhat output) const
 {
@@ -2036,7 +2064,7 @@ void Buffer::writeDocBookSource(odocstream & os, string const & fname,
                        os << from_ascii(tclass.class_header());
                else if (runparams.flavor == OutputParams::XML)
                        os << "PUBLIC \"-//OASIS//DTD DocBook XML V4.2//EN\" "
-                           << "\"http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd\"";
+                           << "\"https://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd\"";
                else
                        os << " PUBLIC \"-//OASIS//DTD DocBook V4.2//EN\"";
 
@@ -2075,41 +2103,48 @@ void Buffer::writeDocBookSource(odocstream & os, string const & fname,
 
                os << "<!-- " << ((runparams.flavor == OutputParams::XML)? "XML" : "SGML")
                                << " file was created by LyX " << lyx_version
-                               << "\n  See http://www.lyx.org/ for more information -->\n";
+                               << "\n  See https://www.lyx.org/ for more information -->\n";
 
                params().documentClass().counters().reset();
 
                sgml::openTag(os, top);
                os << '\n';
-               docbookParagraphs(text(), *this, os, runparams);
+               try {
+                       docbookParagraphs(text(), *this, os, runparams);
+               }
+               catch (ConversionException const &) { return ExportKilled; }
                sgml::closeTag(os, top_element);
        }
+       return ExportSuccess;
 }
 
 
-void Buffer::makeLyXHTMLFile(FileName const & fname,
+Buffer::ExportStatus Buffer::makeLyXHTMLFile(FileName const & fname,
                              OutputParams const & runparams) const
 {
        LYXERR(Debug::LATEX, "makeLyXHTMLFile...");
 
        ofdocstream ofs;
        if (!openFileWrite(ofs, fname))
-               return;
+               return ExportError;
 
        // make sure we are ready to export
        // this has to be done before we validate
        updateBuffer(UpdateMaster, OutputUpdate);
        updateMacroInstances(OutputUpdate);
 
-       writeLyXHTMLSource(ofs, runparams, FullSource);
+       ExportStatus const retval = writeLyXHTMLSource(ofs, runparams, FullSource);
+       if (retval == ExportKilled)
+               return retval;
 
        ofs.close();
        if (ofs.fail())
                lyxerr << "File '" << fname << "' was not closed properly." << endl;
+       return retval;
 }
 
 
-void Buffer::writeLyXHTMLSource(odocstream & os,
+Buffer::ExportStatus Buffer::writeLyXHTMLSource(odocstream & os,
                             OutputParams const & runparams,
                             OutputWhat output) const
 {
@@ -2210,13 +2245,18 @@ void Buffer::writeLyXHTMLSource(odocstream & os,
                if (output != IncludedFile)
                        // if we're an included file, the counters are in the master.
                        params().documentClass().counters().reset();
-               xhtmlParagraphs(text(), *this, xs, runparams);
+               try {
+                       xhtmlParagraphs(text(), *this, xs, runparams);
+               }
+               catch (ConversionException const &) { return ExportKilled; }
                if (output_body_tag)
                        os << "</body>\n";
        }
 
        if (output_preamble)
                os << "</html>\n";
+
+       return ExportSuccess;
 }
 
 
@@ -2239,7 +2279,12 @@ int Buffer::runChktex()
        runparams.flavor = OutputParams::LATEX;
        runparams.nice = false;
        runparams.linelen = lyxrc.plaintext_linelen;
-       makeLaTeXFile(FileName(name), org_path, runparams);
+       ExportStatus const retval =
+               makeLaTeXFile(FileName(name), org_path, runparams);
+       if (retval != ExportSuccess) {
+               // error code on failure
+               return -1;
+       }
 
        TeXErrors terr;
        Chktex chktex(lyxrc.chktex_command, onlyFileName(name), filePath());
@@ -2292,49 +2337,10 @@ void Buffer::getLabelList(vector<docstring> & list) const
 
        list.clear();
        shared_ptr<Toc> toc = d->toc_backend.toc("label");
-       Toc::const_iterator toc_it = toc->begin();
-       Toc::const_iterator end = toc->end();
-       for (; toc_it != end; ++toc_it) {
-               if (toc_it->depth() == 0)
-                       list.push_back(toc_it->str());
-       }
-}
-
-
-void Buffer::updateBibfilesCache(UpdateScope scope) const
-{
-       // FIXME This is probably unnecssary, given where we call this.
-       // If this is a child document, use the parent's cache instead.
-       if (parent() && scope != UpdateChildOnly) {
-               masterBuffer()->updateBibfilesCache();
-               return;
-       }
-
-       d->bibfiles_cache_.clear();
-       for (InsetIterator it = inset_iterator_begin(inset()); it; ++it) {
-               if (it->lyxCode() == BIBTEX_CODE) {
-                       InsetBibtex const & inset = static_cast<InsetBibtex const &>(*it);
-                       support::FileNamePairList const bibfiles = inset.getBibFiles();
-                       d->bibfiles_cache_.insert(d->bibfiles_cache_.end(),
-                               bibfiles.begin(),
-                               bibfiles.end());
-               } else if (it->lyxCode() == INCLUDE_CODE) {
-                       InsetInclude & inset = static_cast<InsetInclude &>(*it);
-                       Buffer const * const incbuf = inset.getChildBuffer();
-                       if (!incbuf)
-                               continue;
-                       support::FileNamePairList const & bibfiles =
-                                       incbuf->getBibfilesCache(UpdateChildOnly);
-                       if (!bibfiles.empty()) {
-                               d->bibfiles_cache_.insert(d->bibfiles_cache_.end(),
-                                       bibfiles.begin(),
-                                       bibfiles.end());
-                       }
-               }
+       for (auto const & tocit : *toc) {
+               if (tocit.depth() == 0)
+                       list.push_back(tocit.str());
        }
-       d->bibfile_cache_valid_ = true;
-       d->bibinfo_cache_valid_ = false;
-       d->cite_labels_valid_ = false;
 }
 
 
@@ -2342,6 +2348,7 @@ void Buffer::invalidateBibinfoCache() const
 {
        d->bibinfo_cache_valid_ = false;
        d->cite_labels_valid_ = false;
+       removeBiblioTempFiles();
        // also invalidate the cache for the parent buffer
        Buffer const * const pbuf = d->parent();
        if (pbuf)
@@ -2349,29 +2356,13 @@ void Buffer::invalidateBibinfoCache() const
 }
 
 
-void Buffer::invalidateBibfileCache() const
-{
-       d->bibfile_cache_valid_ = false;
-       d->bibinfo_cache_valid_ = false;
-       d->cite_labels_valid_ = false;
-       // also invalidate the cache for the parent buffer
-       Buffer const * const pbuf = d->parent();
-       if (pbuf)
-               pbuf->invalidateBibfileCache();
-}
-
-
-support::FileNamePairList const & Buffer::getBibfilesCache(UpdateScope scope) const
+FileNamePairList const & Buffer::getBibfiles(UpdateScope scope) const
 {
        // FIXME This is probably unnecessary, given where we call this.
-       // If this is a child document, use the master's cache instead.
+       // If this is a child document, use the master instead.
        Buffer const * const pbuf = masterBuffer();
        if (pbuf != this && scope != UpdateChildOnly)
-               return pbuf->getBibfilesCache();
-
-       if (!d->bibfile_cache_valid_)
-               this->updateBibfilesCache(scope);
-
+               return pbuf->getBibfiles();
        return d->bibfiles_cache_;
 }
 
@@ -2385,6 +2376,29 @@ BiblioInfo const & Buffer::masterBibInfo() const
 }
 
 
+BiblioInfo const & Buffer::bibInfo() const
+{
+       return d->bibinfo_;
+}
+
+
+void Buffer::registerBibfiles(FileNamePairList const & bf) const {
+       // We register the bib files in the master buffer,
+       // if there is one, but also in every single buffer,
+       // in case a child is compiled alone.
+       Buffer const * const tmp = masterBuffer();
+       if (tmp != this)
+               tmp->registerBibfiles(bf);
+
+       for (auto const & p : bf) {
+               FileNamePairList::const_iterator temp =
+                       find(d->bibfiles_cache_.begin(), d->bibfiles_cache_.end(), p);
+               if (temp == d->bibfiles_cache_.end())
+                       d->bibfiles_cache_.push_back(p);
+       }
+}
+
+
 void Buffer::checkIfBibInfoCacheIsValid() const
 {
        // use the master's cache
@@ -2394,8 +2408,13 @@ void Buffer::checkIfBibInfoCacheIsValid() const
                return;
        }
 
+       // if we already know the cache is invalid, no need to check
+       // the timestamps
+       if (!d->bibinfo_cache_valid_)
+               return;
+
        // compare the cached timestamps with the actual ones.
-       FileNamePairList const & bibfiles_cache = getBibfilesCache();
+       FileNamePairList const & bibfiles_cache = getBibfiles();
        FileNamePairList::const_iterator ei = bibfiles_cache.begin();
        FileNamePairList::const_iterator en = bibfiles_cache.end();
        for (; ei != en; ++ ei) {
@@ -2425,33 +2444,46 @@ void Buffer::reloadBibInfoCache() const
                return;
 
        d->bibinfo_.clear();
-       collectBibKeys();
+       FileNameList checkedFiles;
+       collectBibKeys(checkedFiles);
        d->bibinfo_cache_valid_ = true;
 }
 
 
-void Buffer::collectBibKeys() const
+void Buffer::collectBibKeys(FileNameList & checkedFiles) const
 {
        for (InsetIterator it = inset_iterator_begin(inset()); it; ++it)
-               it->collectBibKeys(it);
+               it->collectBibKeys(it, checkedFiles);
 }
 
 
-void Buffer::addBiblioInfo(BiblioInfo const & bi) const
+void Buffer::addBiblioInfo(BiblioInfo const & bin) const
 {
-       Buffer const * tmp = masterBuffer();
-       BiblioInfo & masterbi = (tmp == this) ?
-               d->bibinfo_ : tmp->d->bibinfo_;
-       masterbi.mergeBiblioInfo(bi);
+       // We add the biblio info to the master buffer,
+       // if there is one, but also to every single buffer,
+       // in case a child is compiled alone.
+       BiblioInfo & bi = d->bibinfo_;
+       bi.mergeBiblioInfo(bin);
+
+       if (parent() != 0) {
+               BiblioInfo & masterbi = parent()->d->bibinfo_;
+               masterbi.mergeBiblioInfo(bin);
+       }
 }
 
 
-void Buffer::addBibTeXInfo(docstring const & key, BibTeXInfo const & bi) const
+void Buffer::addBibTeXInfo(docstring const & key, BibTeXInfo const & bin) const
 {
-       Buffer const * tmp = masterBuffer();
-       BiblioInfo & masterbi = (tmp == this) ?
-               d->bibinfo_ : tmp->d->bibinfo_;
-       masterbi[key] = bi;
+       // We add the bibtex info to the master buffer,
+       // if there is one, but also to every single buffer,
+       // in case a child is compiled alone.
+       BiblioInfo & bi = d->bibinfo_;
+       bi[key] = bin;
+
+       if (parent() != 0) {
+               BiblioInfo & masterbi = parent()->d->bibinfo_;
+               masterbi[key] = bin;
+       }
 }
 
 
@@ -2462,6 +2494,11 @@ void Buffer::makeCitationLabels() const
 }
 
 
+void Buffer::invalidateCiteLabels() const
+{
+       masterBuffer()->d->cite_labels_valid_ = false;
+}
+
 bool Buffer::citeLabelsValid() const
 {
        return masterBuffer()->d->cite_labels_valid_;
@@ -2514,7 +2551,7 @@ bool Buffer::getStatus(FuncRequest const & cmd, FuncStatus & flag)
        switch (cmd.action()) {
 
        case LFUN_BUFFER_TOGGLE_READ_ONLY:
-               flag.setOnOff(isReadonly());
+               flag.setOnOff(hasReadonlyFlag());
                break;
 
                // FIXME: There is need for a command-line import.
@@ -2533,7 +2570,8 @@ bool Buffer::getStatus(FuncRequest const & cmd, FuncStatus & flag)
                        enable = true;
                        break;
                }
-               string format = to_utf8(arg);
+               string format = (arg.empty() || arg == "default") ?
+                       params().getDefaultOutputFormat() : to_utf8(arg);
                size_t pos = format.find(' ');
                if (pos != string::npos)
                        format = format.substr(0, pos);
@@ -2544,10 +2582,6 @@ bool Buffer::getStatus(FuncRequest const & cmd, FuncStatus & flag)
                break;
        }
 
-       case LFUN_BUFFER_CHKTEX:
-               enable = params().isLatex() && !lyxrc.chktex_command.empty();
-               break;
-
        case LFUN_BUILD_PROGRAM:
                enable = params().isExportable("program", false);
                break;
@@ -2589,15 +2623,16 @@ bool Buffer::getStatus(FuncRequest const & cmd, FuncStatus & flag)
                flag.setOnOff(params().output_changes);
                break;
 
-       case LFUN_BUFFER_TOGGLE_COMPRESSION: {
+       case LFUN_BUFFER_TOGGLE_COMPRESSION:
                flag.setOnOff(params().compressed);
                break;
-       }
 
-       case LFUN_BUFFER_TOGGLE_OUTPUT_SYNC: {
+       case LFUN_BUFFER_TOGGLE_OUTPUT_SYNC:
                flag.setOnOff(params().output_sync);
                break;
-       }
+
+       case LFUN_BUFFER_ANONYMIZE:
+               break;
 
        default:
                return false;
@@ -2627,7 +2662,8 @@ void Buffer::dispatch(FuncRequest const & func, DispatchResult & dr)
        string const argument = to_utf8(func.argument());
        // We'll set this back to false if need be.
        bool dispatched = true;
-       undo().beginUndoGroup();
+       // This handles undo groups automagically
+       UndoGroupHelper ugh(this);
 
        switch (func.action()) {
        case LFUN_BUFFER_TOGGLE_READ_ONLY:
@@ -2637,15 +2673,17 @@ void Buffer::dispatch(FuncRequest const & func, DispatchResult & dr)
                                dr.setMessage(log);
                }
                else
-                       setReadonly(!isReadonly());
+                       setReadonly(!hasReadonlyFlag());
                break;
 
        case LFUN_BUFFER_EXPORT: {
-               ExportStatus const status = doExport(argument, false);
+               string const format = (argument.empty() || argument == "default") ?
+                       params().getDefaultOutputFormat() : argument;
+               ExportStatus const status = doExport(format, false);
                dr.setError(status != ExportSuccess);
                if (status != ExportSuccess)
                        dr.setMessage(bformat(_("Error exporting to format: %1$s."),
-                                             func.argument()));
+                                             from_utf8(format)));
                break;
        }
 
@@ -2657,14 +2695,10 @@ void Buffer::dispatch(FuncRequest const & func, DispatchResult & dr)
                break;
        }
 
-       case LFUN_BUFFER_CHKTEX:
-               runChktex();
-               break;
-
        case LFUN_BUFFER_EXPORT_CUSTOM: {
                string format_name;
                string command = split(argument, format_name, ' ');
-               Format const * format = formats.getFormat(format_name);
+               Format const * format = theFormats().getFormat(format_name);
                if (!format) {
                        lyxerr << "Format \"" << format_name
                                << "\" not recognized!"
@@ -2750,18 +2784,16 @@ void Buffer::dispatch(FuncRequest const & func, DispatchResult & dr)
        }
 
        case LFUN_BRANCH_ADD: {
-               docstring branch_name = func.argument();
-               if (branch_name.empty()) {
+               docstring branchnames = func.argument();
+               if (branchnames.empty()) {
                        dispatched = false;
                        break;
                }
                BranchList & branch_list = params().branchlist();
                vector<docstring> const branches =
-                       getVectorFromString(branch_name, branch_list.separator());
+                       getVectorFromString(branchnames, branch_list.separator());
                docstring msg;
-               for (vector<docstring>::const_iterator it = branches.begin();
-                    it != branches.end(); ++it) {
-                       branch_name = *it;
+               for (docstring const & branch_name : branches) {
                        Branch * branch = branch_list.find(branch_name);
                        if (branch) {
                                LYXERR0("Branch " << branch_name << " already exists.");
@@ -2823,7 +2855,7 @@ void Buffer::dispatch(FuncRequest const & func, DispatchResult & dr)
        }
 
        case LFUN_BUFFER_VIEW_CACHE:
-               if (!formats.view(*this, d->preview_file_,
+               if (!theFormats().view(*this, d->preview_file_,
                                  d->preview_format_))
                        dr.setMessage(_("Error viewing the output file."));
                break;
@@ -2872,12 +2904,20 @@ void Buffer::dispatch(FuncRequest const & func, DispatchResult & dr)
                params().output_sync = !params().output_sync;
                break;
 
+       case LFUN_BUFFER_ANONYMIZE: {
+               undo().recordUndoFullBuffer(CursorData());
+               CursorData cur(doc_iterator_begin(this));
+               for ( ; cur ; cur.forwardPar())
+                       cur.paragraph().anonymize();
+               dr.forceBufferUpdate();
+               break;
+       }
+
        default:
                dispatched = false;
                break;
        }
        dr.dispatched(dispatched);
-       undo().endUndoGroup();
 }
 
 
@@ -2905,26 +2945,24 @@ bool Buffer::isMultiLingual() const
 
 std::set<Language const *> Buffer::getLanguages() const
 {
-       std::set<Language const *> languages;
-       getLanguages(languages);
-       return languages;
+       std::set<Language const *> langs;
+       getLanguages(langs);
+       return langs;
 }
 
 
-void Buffer::getLanguages(std::set<Language const *> & languages) const
+void Buffer::getLanguages(std::set<Language const *> & langs) const
 {
        ParConstIterator end = par_iterator_end();
        // add the buffer language, even if it's not actively used
-       languages.insert(language());
+       langs.insert(language());
        // iterate over the paragraphs
        for (ParConstIterator it = par_iterator_begin(); it != end; ++it)
-               it->getLanguages(languages);
+               it->getLanguages(langs);
        // also children
        ListOfBuffers clist = getDescendents();
-       ListOfBuffers::const_iterator cit = clist.begin();
-       ListOfBuffers::const_iterator const cen = clist.end();
-       for (; cit != cen; ++cit)
-               (*cit)->getLanguages(languages);
+       for (auto const & cit : clist)
+               cit->getLanguages(langs);
 }
 
 
@@ -2991,29 +3029,19 @@ bool Buffer::isClean() const
 }
 
 
-bool Buffer::isExternallyModified(CheckMethod method) const
+bool Buffer::isChecksumModified() const
 {
        LASSERT(d->filename.exists(), return false);
-       // if method == timestamp, check timestamp before checksum
-       return (method == checksum_method
-               || d->timestamp_ != d->filename.lastModified())
-               && d->checksum_ != d->filename.checksum();
+       return d->checksum_ != d->filename.checksum();
 }
 
 
 void Buffer::saveCheckSum() const
 {
        FileName const & file = d->filename;
-
        file.refresh();
-       if (file.exists()) {
-               d->timestamp_ = file.lastModified();
-               d->checksum_ = file.checksum();
-       } else {
-               // in the case of save to a new file.
-               d->timestamp_ = 0;
-               d->checksum_ = 0;
-       }
+       d->checksum_ = file.exists() ? file.checksum()
+               : 0; // in the case of save to a new file.
 }
 
 
@@ -3027,6 +3055,7 @@ void Buffer::markClean() const
        // autosave
        d->bak_clean = true;
        d->undo_.markDirty();
+       clearExternalModification();
 }
 
 
@@ -3067,11 +3096,8 @@ void Buffer::markDirty()
        }
        d->bak_clean = false;
 
-       DepClean::iterator it = d->dep_clean.begin();
-       DepClean::const_iterator const end = d->dep_clean.end();
-
-       for (; it != end; ++it)
-               it->second = false;
+       for (auto & depit : d->dep_clean)
+               depit.second = false;
 }
 
 
@@ -3153,15 +3179,32 @@ vector<docstring> const Buffer::prepareBibFilePaths(OutputParams const & runpara
        // check for spaces in paths
        bool found_space = false;
 
-       FileNamePairList::const_iterator it = bibfilelist.begin();
-       FileNamePairList::const_iterator en = bibfilelist.end();
-       for (; it != en; ++it) {
-               string utf8input = to_utf8(it->first);
+       for (auto const & bit : bibfilelist) {
+               string utf8input = to_utf8(bit.first);
                string database =
                        prepareFileNameForLaTeX(utf8input, ".bib", runparams.nice);
-               FileName const try_in_file =
+               FileName try_in_file =
                        makeAbsPath(database + ".bib", filePath());
-               bool const not_from_texmf = try_in_file.isReadableFile();
+               bool not_from_texmf = try_in_file.isReadableFile();
+               // If the file has not been found, try with the real file name
+               // (it might come from a child in a sub-directory)
+               if (!not_from_texmf) {
+                       try_in_file = bit.second;
+                       if (try_in_file.isReadableFile()) {
+                               // Check if the file is in texmf
+                               FileName kpsefile(findtexfile(changeExtension(utf8input, "bib"), "bib", true));
+                               not_from_texmf = kpsefile.empty()
+                                               || kpsefile.absFileName() != try_in_file.absFileName();
+                               if (not_from_texmf)
+                                       // If this exists, make path relative to the master
+                                       // FIXME Unicode
+                                       database =
+                                               removeExtension(prepareFileNameForLaTeX(
+                                                                                       to_utf8(makeRelPath(from_utf8(try_in_file.absFileName()),
+                                                                                                                               from_utf8(filePath()))),
+                                                                                       ".bib", runparams.nice));
+                       }
+               }
 
                if (!runparams.inComment && !runparams.dryrun && !runparams.nice &&
                    not_from_texmf) {
@@ -3247,12 +3290,18 @@ void Buffer::setLayoutPos(string const & path)
 }
 
 
-bool Buffer::isReadonly() const
+bool Buffer::hasReadonlyFlag() const
 {
        return d->read_only;
 }
 
 
+bool Buffer::isReadonly() const
+{
+       return hasReadonlyFlag() || notifiesExternalModification();
+}
+
+
 void Buffer::setParent(Buffer const * buffer)
 {
        // Avoids recursive include.
@@ -3312,10 +3361,8 @@ bool Buffer::hasChildren() const
 void Buffer::collectChildren(ListOfBuffers & clist, bool grand_children) const
 {
        // loop over children
-       Impl::BufferPositionMap::iterator it = d->children_positions.begin();
-       Impl::BufferPositionMap::iterator end = d->children_positions.end();
-       for (; it != end; ++it) {
-               Buffer * child = const_cast<Buffer *>(it->first);
+       for (auto const & p : d->children_positions) {
+               Buffer * child = const_cast<Buffer *>(p.first);
                // No duplicates
                ListOfBuffers::const_iterator bit = find(clist.begin(), clist.end(), child);
                if (bit != clist.end())
@@ -3512,17 +3559,15 @@ void Buffer::Impl::updateMacros(DocIterator & it, DocIterator & scope)
        while (it.pit() <= lastpit) {
                Paragraph & par = it.paragraph();
 
+               // FIXME Can this be done with the new-style iterators?
                // iterate over the insets of the current paragraph
-               InsetList const & insets = par.insetList();
-               InsetList::const_iterator iit = insets.begin();
-               InsetList::const_iterator end = insets.end();
-               for (; iit != end; ++iit) {
-                       it.pos() = iit->pos;
+               for (auto const & insit : par.insetList()) {
+                       it.pos() = insit.pos;
 
                        // is it a nested text inset?
-                       if (iit->inset->asInsetText()) {
+                       if (insit.inset->asInsetText()) {
                                // Inset needs its own scope?
-                               InsetText const * itext = iit->inset->asInsetText();
+                               InsetText const * itext = insit.inset->asInsetText();
                                bool newScope = itext->isMacroScope();
 
                                // scope which ends just behind the inset
@@ -3530,14 +3575,14 @@ void Buffer::Impl::updateMacros(DocIterator & it, DocIterator & scope)
                                ++insetScope.pos();
 
                                // collect macros in inset
-                               it.push_back(CursorSlice(*iit->inset));
+                               it.push_back(CursorSlice(*insit.inset));
                                updateMacros(it, newScope ? insetScope : scope);
                                it.pop_back();
                                continue;
                        }
 
-                       if (iit->inset->asInsetTabular()) {
-                               CursorSlice slice(*iit->inset);
+                       if (insit.inset->asInsetTabular()) {
+                               CursorSlice slice(*insit.inset);
                                size_t const numcells = slice.nargs();
                                for (; slice.idx() < numcells; slice.forwardIdx()) {
                                        it.push_back(slice);
@@ -3548,12 +3593,12 @@ void Buffer::Impl::updateMacros(DocIterator & it, DocIterator & scope)
                        }
 
                        // is it an external file?
-                       if (iit->inset->lyxCode() == INCLUDE_CODE) {
+                       if (insit.inset->lyxCode() == INCLUDE_CODE) {
                                // get buffer of external file
-                               InsetInclude const & inset =
-                                       static_cast<InsetInclude const &>(*iit->inset);
+                               InsetInclude const & incinset =
+                                       static_cast<InsetInclude const &>(*insit.inset);
                                macro_lock = true;
-                               Buffer * child = inset.getChildBuffer();
+                               Buffer * child = incinset.getChildBuffer();
                                macro_lock = false;
                                if (!child)
                                        continue;
@@ -3569,19 +3614,19 @@ void Buffer::Impl::updateMacros(DocIterator & it, DocIterator & scope)
                                continue;
                        }
 
-                       InsetMath * im = iit->inset->asInsetMath();
+                       InsetMath * im = insit.inset->asInsetMath();
                        if (doing_export && im)  {
                                InsetMathHull * hull = im->asHullInset();
                                if (hull)
                                        hull->recordLocation(it);
                        }
 
-                       if (iit->inset->lyxCode() != MATHMACRO_CODE)
+                       if (insit.inset->lyxCode() != MATHMACRO_CODE)
                                continue;
 
                        // get macro data
-                       MathMacroTemplate & macroTemplate =
-                               *iit->inset->asInsetMath()->asMacroTemplate();
+                       InsetMathMacroTemplate & macroTemplate =
+                               *insit.inset->asInsetMath()->asMacroTemplate();
                        MacroContext mc(owner_, it);
                        macroTemplate.updateToContext(mc);
 
@@ -3691,16 +3736,16 @@ void Buffer::listMacroNames(MacroNameSet & macros) const
        d->macro_lock = true;
 
        // loop over macro names
-       Impl::NamePositionScopeMacroMap::iterator nameIt = d->macros.begin();
-       Impl::NamePositionScopeMacroMap::iterator nameEnd = d->macros.end();
-       for (; nameIt != nameEnd; ++nameIt)
-               macros.insert(nameIt->first);
+       for (auto const & nameit : d->macros)
+               macros.insert(nameit.first);
 
        // loop over children
-       Impl::BufferPositionMap::iterator it = d->children_positions.begin();
-       Impl::BufferPositionMap::iterator end = d->children_positions.end();
-       for (; it != end; ++it)
-               it->first->listMacroNames(macros);
+       for (auto const & p : d->children_positions) {
+               Buffer * child = const_cast<Buffer *>(p.first);
+               // The buffer might have been closed (see #10766).
+               if (theBufferList().isLoaded(child))
+                       child->listMacroNames(macros);
+       }
 
        // call parent
        Buffer const * const pbuf = d->parent();
@@ -3721,16 +3766,13 @@ void Buffer::listParentMacros(MacroSet & macros, LaTeXFeatures & features) const
        pbuf->listMacroNames(names);
 
        // resolve macros
-       MacroNameSet::iterator it = names.begin();
-       MacroNameSet::iterator end = names.end();
-       for (; it != end; ++it) {
+       for (auto const & mit : names) {
                // defined?
-               MacroData const * data =
-               pbuf->getMacro(*it, *this, false);
+               MacroData const * data = pbuf->getMacro(mit, *this, false);
                if (data) {
                        macros.insert(data);
 
-                       // we cannot access the original MathMacroTemplate anymore
+                       // we cannot access the original InsetMathMacroTemplate anymore
                        // here to calls validate method. So we do its work here manually.
                        // FIXME: somehow make the template accessible here.
                        if (data->optionals() > 0)
@@ -3795,20 +3837,16 @@ void Buffer::changeRefsIfUnique(docstring const & from, docstring const & to)
        reloadBibInfoCache();
 
        // Check if the label 'from' appears more than once
-       BiblioInfo const & keys = masterBibInfo();
-       BiblioInfo::const_iterator bit  = keys.begin();
-       BiblioInfo::const_iterator bend = keys.end();
        vector<docstring> labels;
-
-       for (; bit != bend; ++bit)
-               // FIXME UNICODE
-               labels.push_back(bit->first);
+       for (auto const & bibit : masterBibInfo())
+               labels.push_back(bibit.first);
 
        if (count(labels.begin(), labels.end(), from) > 1)
                return;
 
        string const paramName = "key";
-       for (InsetIterator it = inset_iterator_begin(inset()); it; ++it) {
+       InsetIterator it = inset_iterator_begin(inset());
+       for (; it; ++it) {
                if (it->lyxCode() != CITE_CODE)
                        continue;
                InsetCommand * inset = it->asInsetCommand();
@@ -3923,6 +3961,7 @@ unique_ptr<TexRow> Buffer::getSourceCode(odocstream & os, string const & format,
                        ots.texrow().newlines(2);
                        if (master)
                                runparams.is_child = true;
+                       updateBuffer();
                        writeLaTeXSource(ots, string(), runparams, output);
                        texrow = ots.releaseTexRow();
                }
@@ -4081,7 +4120,7 @@ int AutoSaveBuffer::generateChild()
        return pid;
 }
 
-} // namespace anon
+} // namespace
 
 
 FileName Buffer::getEmergencyFileName() const
@@ -4116,7 +4155,7 @@ void Buffer::removeAutosaveFile() const
 }
 
 
-void Buffer::moveAutosaveFile(support::FileName const & oldauto) const
+void Buffer::moveAutosaveFile(FileName const & oldauto) const
 {
        FileName const newauto = getAutosaveFileName();
        oldauto.refresh();
@@ -4129,7 +4168,7 @@ void Buffer::moveAutosaveFile(support::FileName const & oldauto) const
 bool Buffer::autoSave() const
 {
        Buffer const * buf = d->cloned_buffer_ ? d->cloned_buffer_ : this;
-       if (buf->d->bak_clean || isReadonly())
+       if (buf->d->bak_clean || hasReadonlyFlag())
                return true;
 
        message(_("Autosaving current document..."));
@@ -4158,10 +4197,8 @@ void Buffer::setExportStatus(bool e) const
 {
        d->doing_export = e;
        ListOfBuffers clist = getDescendents();
-       ListOfBuffers::const_iterator cit = clist.begin();
-       ListOfBuffers::const_iterator const cen = clist.end();
-       for (; cit != cen; ++cit)
-               (*cit)->d->doing_export = e;
+       for (auto const & bit : clist)
+               bit->d->doing_export = e;
 }
 
 
@@ -4227,6 +4264,8 @@ Buffer::ExportStatus Buffer::doExport(string const & target, bool put_in_tempdir
        if (pos != string::npos) {
                dest_filename = target.substr(pos + 1, target.length() - pos - 1);
                format = target.substr(0, pos);
+               if (format == "default")
+                       format = params().getDefaultOutputFormat();
                runparams.export_folder = FileName(dest_filename).onlyPath().realPath();
                FileName(dest_filename).onlyPath().createPath();
                LYXERR(Debug::FILES, "format=" << format << ", dest_filename=" << dest_filename << ", export_folder=" << runparams.export_folder);
@@ -4243,11 +4282,10 @@ Buffer::ExportStatus Buffer::doExport(string const & target, bool put_in_tempdir
                // Get shortest path to format
                converters.buildGraph();
                Graph::EdgePath path;
-               for (vector<string>::const_iterator it = backs.begin();
-                    it != backs.end(); ++it) {
-                       Graph::EdgePath p = converters.getPath(*it, format);
+               for (string const & sit : backs) {
+                       Graph::EdgePath p = converters.getPath(sit, format);
                        if (!p.empty() && (path.empty() || p.size() < path.size())) {
-                               backend_format = *it;
+                               backend_format = sit;
                                path = p;
                        }
                }
@@ -4257,15 +4295,14 @@ Buffer::ExportStatus Buffer::doExport(string const & target, bool put_in_tempdir
                                // file (not for previewing).
                                Alert::error(_("Couldn't export file"), bformat(
                                        _("No information for exporting the format %1$s."),
-                                       formats.prettyName(format)));
+                                       theFormats().prettyName(format)));
                        }
                        return ExportNoPathToFormat;
                }
                runparams.flavor = converters.getFlavor(path, this);
-               Graph::EdgePath::const_iterator it = path.begin();
-               Graph::EdgePath::const_iterator en = path.end();
-               for (; it != en; ++it)
-                       if (theConverters().get(*it).nice()) {
+               runparams.hyperref_driver = converters.getHyperrefDriver(path);
+               for (auto const & edge : path)
+                       if (theConverters().get(edge).nice()) {
                                need_nice_file = true;
                                break;
                        }
@@ -4287,57 +4324,72 @@ Buffer::ExportStatus Buffer::doExport(string const & target, bool put_in_tempdir
        string filename = latexName(false);
        filename = addName(temppath(), filename);
        filename = changeExtension(filename,
-                                  formats.extension(backend_format));
+                                  theFormats().extension(backend_format));
        LYXERR(Debug::FILES, "filename=" << filename);
 
        // Plain text backend
        if (backend_format == "text") {
                runparams.flavor = OutputParams::TEXT;
-               writePlaintextFile(*this, FileName(filename), runparams);
+               try {
+                       writePlaintextFile(*this, FileName(filename), runparams);
+               }
+               catch (ConversionException const &) { return ExportCancel; }
        }
        // HTML backend
        else if (backend_format == "xhtml") {
                runparams.flavor = OutputParams::HTML;
                setMathFlavor(runparams);
-               makeLyXHTMLFile(FileName(filename), runparams);
+               if (makeLyXHTMLFile(FileName(filename), runparams) == ExportKilled)
+                       return ExportKilled;
        } else if (backend_format == "lyx")
                writeFile(FileName(filename));
        // Docbook backend
        else if (params().isDocBook()) {
                runparams.nice = !put_in_tempdir;
-               makeDocBookFile(FileName(filename), runparams);
+               if (makeDocBookFile(FileName(filename), runparams) == ExportKilled)
+                       return ExportKilled;
        }
        // LaTeX backend
        else if (backend_format == format || need_nice_file) {
                runparams.nice = true;
-               bool const success = makeLaTeXFile(FileName(filename), string(), runparams);
+               ExportStatus const retval =
+                       makeLaTeXFile(FileName(filename), string(), runparams);
+               if (retval == ExportKilled)
+                       return ExportKilled;
                if (d->cloned_buffer_)
                        d->cloned_buffer_->d->errorLists["Export"] = d->errorLists["Export"];
-               if (!success)
-                       return ExportError;
+               if (retval != ExportSuccess)
+                       return retval;
        } else if (!lyxrc.tex_allows_spaces
                   && contains(filePath(), ' ')) {
                Alert::error(_("File name error"),
-                          _("The directory path to the document cannot contain spaces."));
+                       bformat(_("The directory path to the document\n%1$s\n"
+                           "contains spaces, but your TeX installation does "
+                           "not allow them."), from_ascii(filePath())));
                return ExportTexPathHasSpaces;
        } else {
                runparams.nice = false;
-               bool const success = makeLaTeXFile(
-                       FileName(filename), filePath(), runparams);
+               ExportStatus const retval =
+                       makeLaTeXFile(FileName(filename), filePath(), runparams);
+               if (retval == ExportKilled)
+                       return ExportKilled;
                if (d->cloned_buffer_)
                        d->cloned_buffer_->d->errorLists["Export"] = d->errorLists["Export"];
-               if (!success)
+               if (retval != ExportSuccess)
                        return ExportError;
        }
 
        string const error_type = (format == "program")
                ? "Build" : params().bufferFormat();
        ErrorList & error_list = d->errorLists[error_type];
-       string const ext = formats.extension(format);
+       string const ext = theFormats().extension(format);
        FileName const tmp_result_file(changeExtension(filename, ext));
-       bool const success = converters.convert(this, FileName(filename),
-               tmp_result_file, FileName(absFileName()), backend_format, format,
-               error_list);
+       Converters::RetVal const retval = 
+               converters.convert(this, FileName(filename), tmp_result_file, 
+               FileName(absFileName()), backend_format, format, error_list);
+       if (retval == Converters::KILLED)
+               return ExportCancel;
+       bool success = (retval == Converters::SUCCESS);
 
        // Emit the signal to show the error list or copy it back to the
        // cloned Buffer so that it can be emitted afterwards.
@@ -4351,20 +4403,18 @@ Buffer::ExportStatus Buffer::doExport(string const & target, bool put_in_tempdir
                        errors(error_type);
                // also to the children, in case of master-buffer-view
                ListOfBuffers clist = getDescendents();
-               ListOfBuffers::const_iterator cit = clist.begin();
-               ListOfBuffers::const_iterator const cen = clist.end();
-               for (; cit != cen; ++cit) {
+               for (auto const & bit : clist) {
                        if (runparams.silent)
-                               (*cit)->d->errorLists[error_type].clear();
+                               bit->d->errorLists[error_type].clear();
                        else if (d->cloned_buffer_) {
                                // Enable reverse search by copying back the
                                // texrow object to the cloned buffer.
                                // FIXME: this is not thread safe.
-                               (*cit)->d->cloned_buffer_->d->texrow = (*cit)->d->texrow;
-                               (*cit)->d->cloned_buffer_->d->errorLists[error_type] =
-                                       (*cit)->d->errorLists[error_type];
+                               bit->d->cloned_buffer_->d->texrow = bit->d->texrow;
+                               bit->d->cloned_buffer_->d->errorLists[error_type] =
+                                       bit->d->errorLists[error_type];
                        } else
-                               (*cit)->errors(error_type, true);
+                               bit->errors(error_type, true);
                }
        }
 
@@ -4374,8 +4424,8 @@ Buffer::ExportStatus Buffer::doExport(string const & target, bool put_in_tempdir
                // FIXME: There is a possibility of concurrent access to texrow
                // here from the main GUI thread that should be securized.
                d->cloned_buffer_->d->texrow = d->texrow;
-               string const error_type = params().bufferFormat();
-               d->cloned_buffer_->d->errorLists[error_type] = d->errorLists[error_type];
+               string const err_type = params().bufferFormat();
+               d->cloned_buffer_->d->errorLists[error_type] = d->errorLists[err_type];
        }
 
 
@@ -4398,11 +4448,13 @@ Buffer::ExportStatus Buffer::doExport(string const & target, bool put_in_tempdir
                                 : force_overwrite == ALL_FILES;
        CopyStatus status = use_force ? FORCE : SUCCESS;
 
-       vector<ExportedFile>::const_iterator it = files.begin();
-       vector<ExportedFile>::const_iterator const en = files.end();
-       for (; it != en && status != CANCEL; ++it) {
-               string const fmt = formats.getFormatFromFile(it->sourceName);
-               string fixedName = it->exportName;
+       for (ExportedFile const & exp : files) {
+               if (status == CANCEL) {
+                       message(_("Document export cancelled."));
+                       return ExportCancel;
+               }
+               string const fmt = theFormats().getFormatFromFile(exp.sourceName);
+               string fixedName = exp.exportName;
                if (!runparams.export_folder.empty()) {
                        // Relative pathnames starting with ../ will be sanitized
                        // if exporting to a different folder
@@ -4411,16 +4463,12 @@ Buffer::ExportStatus Buffer::doExport(string const & target, bool put_in_tempdir
                }
                FileName fixedFileName = makeAbsPath(fixedName, dest);
                fixedFileName.onlyPath().createPath();
-               status = copyFile(fmt, it->sourceName,
+               status = copyFile(fmt, exp.sourceName,
                        fixedFileName,
-                       it->exportName, status == FORCE,
+                       exp.exportName, status == FORCE,
                        runparams.export_folder.empty());
        }
 
-       if (status == CANCEL) {
-               message(_("Document export cancelled."));
-               return ExportCancel;
-       }
 
        if (tmp_result_file.exists()) {
                // Finally copy the main file
@@ -4437,13 +4485,13 @@ Buffer::ExportStatus Buffer::doExport(string const & target, bool put_in_tempdir
                } else {
                        message(bformat(_("Document exported as %1$s "
                                "to file `%2$s'"),
-                               formats.prettyName(format),
+                               theFormats().prettyName(format),
                                makeDisplayPath(result_file)));
                }
        } else {
                // This must be a dummy converter like fax (bug 1888)
                message(bformat(_("Document exported as %1$s"),
-                       formats.prettyName(format)));
+                       theFormats().prettyName(format)));
        }
 
        return success ? ExportSuccess : ExportConverterError;
@@ -4482,7 +4530,7 @@ Buffer::ExportStatus Buffer::preview(string const & format, bool includeall) con
                return status;
 
        if (previewFile.exists())
-               return formats.view(*this, previewFile, format) ?
+               return theFormats().view(*this, previewFile, format) ?
                        PreviewSuccess : PreviewError;
 
        // Successful export but no output file?
@@ -4524,7 +4572,7 @@ Buffer::ReadStatus Buffer::loadEmergency()
                ReadStatus const ret_llf = loadThisLyXFile(emergencyFile);
                bool const success = (ret_llf == ReadSuccess);
                if (success) {
-                       if (isReadonly()) {
+                       if (hasReadonlyFlag()) {
                                Alert::warning(_("File is read-only"),
                                        bformat(_("An emergency file is successfully loaded, "
                                        "but the original file %1$s is marked read-only. "
@@ -4587,7 +4635,7 @@ Buffer::ReadStatus Buffer::loadAutosave()
                ReadStatus const ret_llf = loadThisLyXFile(autosaveFile);
                // the file is not saved if we load the autosave file.
                if (ret_llf == ReadSuccess) {
-                       if (isReadonly()) {
+                       if (hasReadonlyFlag()) {
                                Alert::warning(_("File is read-only"),
                                        bformat(_("A backup file is successfully loaded, "
                                        "but the original file %1$s is marked read-only. "
@@ -4641,7 +4689,7 @@ Buffer::ReadStatus Buffer::loadThisLyXFile(FileName const & fn)
 void Buffer::bufferErrors(TeXErrors const & terr, ErrorList & errorList) const
 {
        for (auto const & err : terr) {
-               TexRow::TextEntry start, end = TexRow::text_none;
+               TexRow::TextEntry start = TexRow::text_none, end = TexRow::text_none;
                int errorRow = err.error_in_line;
                Buffer const * buf = 0;
                Impl const * p = d;
@@ -4671,12 +4719,6 @@ void Buffer::bufferErrors(TeXErrors const & terr, ErrorList & errorList) const
 }
 
 
-void Buffer::setBuffersForInsets() const
-{
-       inset().setBuffer(const_cast<Buffer &>(*this));
-}
-
-
 void Buffer::updateBuffer(UpdateScope scope, UpdateType utype) const
 {
        LBUFERR(!text().paragraphs().empty());
@@ -4685,10 +4727,17 @@ void Buffer::updateBuffer(UpdateScope scope, UpdateType utype) const
        Buffer const * const master = masterBuffer();
        DocumentClass const & textclass = master->params().documentClass();
 
-       // do this only if we are the top-level Buffer
-       if (master == this) {
+       FileNamePairList old_bibfiles;
+       // Do this only if we are the top-level Buffer. We also need to account
+       // for the case of a previewed child with ignored parent here.
+       if (master == this && !d->ignore_parent) {
                textclass.counters().reset(from_ascii("bibitem"));
                reloadBibInfoCache();
+               // we will re-read this cache as we go through, but we need
+               // to know whether it's changed to know whether we need to
+               // update the bibinfo cache.
+               old_bibfiles = d->bibfiles_cache_;
+               d->bibfiles_cache_.clear();
        }
 
        // keep the buffers to be children in this set. If the call from the
@@ -4704,7 +4753,7 @@ void Buffer::updateBuffer(UpdateScope scope, UpdateType utype) const
                        // not updated during the updateBuffer call and TocModel::toc_ is invalid
                        // (bug 5699). The same happens if the master buffer is open in a different
                        // window. This test catches both possibilities.
-                       // See: http://marc.info/?l=lyx-devel&m=138590578911716&w=2
+                       // See: https://marc.info/?l=lyx-devel&m=138590578911716&w=2
                        // There remains a problem here: If there is another child open in yet a third
                        // window, that TOC is not updated. So some more general solution is needed at
                        // some point.
@@ -4734,16 +4783,48 @@ void Buffer::updateBuffer(UpdateScope scope, UpdateType utype) const
        ParIterator parit = cbuf.par_iterator_begin();
        updateBuffer(parit, utype);
 
-       /// FIXME: Perf
-       /// Update the tocBackend for any buffer. The outliner uses the master's,
-       /// and the navigation menu uses the child's.
-       cbuf.tocBackend().update(true, utype);
-
+       // If this document has siblings, then update the TocBackend later. The
+       // reason is to ensure that later siblings are up to date when e.g. the
+       // broken or not status of references is computed. The update is called
+       // in InsetInclude::addToToc.
        if (master != this)
                return;
 
-       d->bibinfo_cache_valid_ = true;
+       // if the bibfiles changed, the cache of bibinfo is invalid
+       FileNamePairList new_bibfiles = d->bibfiles_cache_;
+       // this is a trick to determine whether the two vectors have
+       // the same elements.
+       sort(new_bibfiles.begin(), new_bibfiles.end());
+       sort(old_bibfiles.begin(), old_bibfiles.end());
+       if (old_bibfiles != new_bibfiles) {
+               LYXERR(Debug::FILES, "Reloading bibinfo cache.");
+               invalidateBibinfoCache();
+               reloadBibInfoCache();
+               // We relied upon the bibinfo cache when recalculating labels. But that
+               // cache was invalid, although we didn't find that out until now. So we
+               // have to do it all again.
+               // That said, the only thing we really need to do is update the citation
+               // labels. Nothing else will have changed. So we could create a new 
+               // UpdateType that would signal that fact, if we needed to do so.
+               parit = cbuf.par_iterator_begin();
+               // we will be re-doing the counters and references and such.
+               textclass.counters().reset();
+               clearReferenceCache();
+               // we should not need to do this again?
+               // updateMacros();
+               setChangesPresent(false);
+               updateBuffer(parit, utype);
+               // this will already have been done by reloadBibInfoCache();
+               // d->bibinfo_cache_valid_ = true;
+       }
+       else {
+               LYXERR(Debug::FILES, "Bibfiles unchanged.");
+               // this is also set to true on the other path, by reloadBibInfoCache.
+               d->bibinfo_cache_valid_ = true;
+       }
        d->cite_labels_valid_ = true;
+       /// FIXME: Perf
+       cbuf.tocBackend().update(true, utype);
        if (scope == UpdateMaster)
                cbuf.structureChanged();
 }
@@ -4887,8 +4968,10 @@ void Buffer::Impl::setLabel(ParIterator & it, UpdateType utype) const
                switch (par.itemdepth) {
                case 2:
                        enumcounter += 'i';
+                       // fall through
                case 1:
                        enumcounter += 'i';
+                       // fall through
                case 0:
                        enumcounter += 'i';
                        break;
@@ -4900,13 +4983,14 @@ void Buffer::Impl::setLabel(ParIterator & it, UpdateType utype) const
                        break;
                }
 
-               // Increase the master counter?
-               if (layout.stepmastercounter && needEnumCounterReset(it))
-                       counters.stepMaster(enumcounter, utype);
-
-               // Maybe we have to reset the enumeration counter.
-               if (!layout.resumecounter && needEnumCounterReset(it))
-                       counters.reset(enumcounter);
+               if (needEnumCounterReset(it)) {
+                       // Increase the master counter?
+                       if (layout.stepmastercounter)
+                               counters.stepMaster(enumcounter, utype);
+                       // Maybe we have to reset the enumeration counter.
+                       if (!layout.resumecounter)
+                               counters.reset(enumcounter);
+               }
                counters.step(enumcounter, utype);
 
                string const & lang = par.getParLanguage(bp)->code();
@@ -4985,7 +5069,7 @@ void Buffer::updateBuffer(ParIterator & parit, UpdateType utype) const
                         * non-const. This would however be costly in
                         * terms of code duplication.
                         */
-                       const_cast<Buffer *>(this)->undo().recordUndo(CursorData(parit));
+                       CursorData(parit).recordUndo();
                        parit->params().depth(maxdepth);
                }
                maxdepth = parit->getMaxDepthAfter();
@@ -5001,15 +5085,13 @@ void Buffer::updateBuffer(ParIterator & parit, UpdateType utype) const
                // set the counter for this paragraph
                d->setLabel(parit, utype);
 
-               // update change-tracking flag 
+               // update change-tracking flag
                parit->addChangesToBuffer(*this);
 
                // now the insets
-               InsetList::const_iterator iit = parit->insetList().begin();
-               InsetList::const_iterator end = parit->insetList().end();
-               for (; iit != end; ++iit) {
-                       parit.pos() = iit->pos;
-                       iit->inset->updateBuffer(parit, utype);
+               for (auto const & insit : parit->insetList()) {
+                       parit.pos() = insit.pos;
+                       insit.inset->updateBuffer(parit, utype);
                }
        }
 }
@@ -5127,7 +5209,7 @@ int Buffer::charCount(bool with_blanks) const
 Buffer::ReadStatus Buffer::reload()
 {
        setBusy(true);
-       // c.f. bug http://www.lyx.org/trac/ticket/6587
+       // c.f. bug https://www.lyx.org/trac/ticket/6587
        removeAutosaveFile();
        // e.g., read-only status could have changed due to version control
        d->filename.refresh();
@@ -5193,11 +5275,9 @@ bool Buffer::saveAs(FileName const & fn)
 
 void Buffer::checkChildBuffers()
 {
-       Impl::BufferPositionMap::iterator it = d->children_positions.begin();
-       Impl::BufferPositionMap::iterator const en = d->children_positions.end();
-       for (; it != en; ++it) {
-               DocIterator dit = it->second;
-               Buffer * cbuf = const_cast<Buffer *>(it->first);
+       for (auto const & bit : d->children_positions) {
+               DocIterator dit = bit.second;
+               Buffer * cbuf = const_cast<Buffer *>(bit.first);
                if (!cbuf || !theBufferList().isLoaded(cbuf))
                        continue;
                Inset * inset = dit.nextInset();
@@ -5292,5 +5372,59 @@ void Buffer::updateChangesPresent() const
 }
 
 
+void Buffer::Impl::refreshFileMonitor()
+{
+       if (file_monitor_ && file_monitor_->filename() == filename.absFileName()) {
+               file_monitor_->refresh();
+               return;
+       }
+
+       // The previous file monitor is invalid
+       // This also destroys the previous file monitor and all its connections
+       file_monitor_ = FileSystemWatcher::monitor(filename);
+       // file_monitor_ will be destroyed with *this, so it is not going to call a
+       // destroyed object method.
+       file_monitor_->connect([this](bool exists) {
+                       fileExternallyModified(exists);
+               });
+}
+
+
+void Buffer::Impl::fileExternallyModified(bool const exists)
+{
+       // ignore notifications after our own saving operations
+       if (checksum_ == filename.checksum()) {
+               LYXERR(Debug::FILES, "External modification but "
+                      "checksum unchanged: " << filename);
+               return;
+       }
+       // If the file has been deleted, only mark the file as dirty since it is
+       // pointless to prompt for reloading. If later a file is moved into this
+       // location, then the externally modified warning will appear then.
+       if (exists)
+                       externally_modified_ = true;
+       // Update external modification notification.
+       // Dirty buffers must be visible at all times.
+       if (wa_ && wa_->unhide(owner_))
+               wa_->updateTitles();
+       else
+               // Unable to unhide the buffer (e.g. no GUI or not current View)
+               lyx_clean = true;
+}
+
+
+bool Buffer::notifiesExternalModification() const
+{
+       return d->externally_modified_;
+}
+
+
+void Buffer::clearExternalModification() const
+{
+       d->externally_modified_ = false;
+       if (d->wa_)
+               d->wa_->updateTitles();
+}
+
 
 } // namespace lyx