Const.

[lyx.git] / src / Buffer.cpp

/**
 * \file Buffer.cpp
 * This file is part of LyX, the document processor.
 * Licence details can be found in the file COPYING.
 *
 * \author Lars Gullik Bjønnes
 * \author Stefan Schimanski
 *
 * Full author contact details are available in file CREDITS.
 */

#include <config.h>

#include "Buffer.h"

#include "Author.h"
#include "LayoutFile.h"
#include "BiblioInfo.h"
#include "BranchList.h"
#include "buffer_funcs.h"
#include "BufferList.h"
#include "BufferParams.h"
#include "Bullet.h"
#include "Chktex.h"
#include "Converter.h"
#include "Counters.h"
#include "DispatchResult.h"
#include "DocIterator.h"
#include "Encoding.h"
#include "ErrorList.h"
#include "Exporter.h"
#include "Format.h"
#include "FuncRequest.h"
#include "FuncStatus.h"
#include "IndicesList.h"
#include "InsetIterator.h"
#include "InsetList.h"
#include "Language.h"
#include "LaTeXFeatures.h"
#include "LaTeX.h"
#include "Layout.h"
#include "Lexer.h"
#include "LyXAction.h"
#include "LyX.h"
#include "LyXFunc.h"
#include "LyXRC.h"
#include "LyXVC.h"
#include "output_docbook.h"
#include "output.h"
#include "output_latex.h"
#include "output_xhtml.h"
#include "output_plaintext.h"
#include "Paragraph.h"
#include "ParagraphParameters.h"
#include "ParIterator.h"
#include "PDFOptions.h"
#include "SpellChecker.h"
#include "sgml.h"
#include "TexRow.h"
#include "TexStream.h"
#include "Text.h"
#include "TextClass.h"
#include "TocBackend.h"
#include "Undo.h"
#include "VCBackend.h"
#include "version.h"
#include "WordLangTuple.h"
#include "WordList.h"

#include "insets/InsetBibitem.h"
#include "insets/InsetBibtex.h"
#include "insets/InsetBranch.h"
#include "insets/InsetInclude.h"
#include "insets/InsetText.h"

#include "mathed/MacroTable.h"
#include "mathed/MathMacroTemplate.h"
#include "mathed/MathSupport.h"

#include "frontends/alert.h"
#include "frontends/Delegates.h"
#include "frontends/WorkAreaManager.h"

#include "graphics/Previews.h"

#include "support/lassert.h"
#include "support/convert.h"
#include "support/debug.h"
#include "support/docstring_list.h"
#include "support/ExceptionMessage.h"
#include "support/FileName.h"
#include "support/FileNameList.h"
#include "support/filetools.h"
#include "support/ForkedCalls.h"
#include "support/gettext.h"
#include "support/gzstream.h"
#include "support/lstrings.h"
#include "support/lyxalgo.h"
#include "support/os.h"
#include "support/Package.h"
#include "support/Path.h"
#include "support/Systemcall.h"
#include "support/textutils.h"
#include "support/types.h"

#include <boost/bind.hpp>
#include <boost/shared_ptr.hpp>

#include <algorithm>
#include <fstream>
#include <iomanip>
#include <map>
#include <set>
#include <sstream>
#include <stack>
#include <vector>

using namespace std;
using namespace lyx::support;

namespace lyx {

namespace Alert = frontend::Alert;
namespace os = support::os;

namespace {

// Do not remove the comment below, so we get merge conflict in
// independent branches. Instead add your own.
int const LYX_FORMAT = 370; // uwestoehr: option to suppress default date

typedef map<string, bool> DepClean;
typedef map<docstring, pair<InsetLabel const *, Buffer::References> > RefCache;

void showPrintError(string const & name)
{
        docstring str = bformat(_("Could not print the document %1$s.\n"
                                            "Check that your printer is set up correctly."),
                             makeDisplayPath(name, 50));
        Alert::error(_("Print document failed"), str);
}

} // namespace anon

class BufferSet : public std::set<Buffer const *> {};

class Buffer::Impl
{
public:
        Impl(Buffer & parent, FileName const & file, bool readonly);

        ~Impl()
        {
                if (wa_) {
                        wa_->closeAll();
                        delete wa_;
                }
                delete inset;
        }

        BufferParams params;
        LyXVC lyxvc;
        FileName temppath;
        mutable TexRow texrow;

        /// need to regenerate .tex?
        DepClean dep_clean;

        /// is save needed?
        mutable bool lyx_clean;

        /// is autosave needed?
        mutable bool bak_clean;

        /// is this a unnamed file (New...)?
        bool unnamed;

        /// buffer is r/o
        bool read_only;

        /// name of the file the buffer is associated with.
        FileName filename;

        /** Set to true only when the file is fully loaded.
         *  Used to prevent the premature generation of previews
         *  and by the citation inset.
         */
        bool file_fully_loaded;

        ///
        mutable TocBackend toc_backend;

        /// macro tables
        typedef pair<DocIterator, MacroData> ScopeMacro;
        typedef map<DocIterator, ScopeMacro> PositionScopeMacroMap;
        typedef map<docstring, PositionScopeMacroMap> NamePositionScopeMacroMap;
        /// map from the macro name to the position map,
        /// which maps the macro definition position to the scope and the MacroData.
        NamePositionScopeMacroMap macros;
        bool macro_lock;

        /// positions of child buffers in the buffer
        typedef map<Buffer const * const, DocIterator> BufferPositionMap;
        typedef pair<DocIterator, Buffer const *> ScopeBuffer;
        typedef map<DocIterator, ScopeBuffer> PositionScopeBufferMap;
        /// position of children buffers in this buffer
        BufferPositionMap children_positions;
        /// map from children inclusion positions to their scope and their buffer
        PositionScopeBufferMap position_to_children;

        /// 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_;
        unsigned long checksum_;

        ///
        frontend::WorkAreaManager * wa_;

        ///
        Undo undo_;

        /// A cache for the bibfiles (including bibfiles of loaded child
        /// documents), needed for appropriate update of natbib labels.
        mutable support::FileNameList bibfilesCache_;

        // FIXME The caching mechanism could be improved. At present, we have a
        // cache for each Buffer, that caches all the bibliography info for that
        // Buffer. A more efficient solution would be to have a global cache per
        // file, and then to construct the Buffer's bibinfo from that.
        /// A cache for bibliography info
        mutable BiblioInfo bibinfo_;
        /// whether the bibinfo cache is valid
        bool bibinfoCacheValid_;
        /// Cache of timestamps of .bib files
        map<FileName, time_t> bibfileStatus_;

        mutable RefCache ref_cache_;

        /// our Text that should be wrapped in an InsetText
        InsetText * inset;

        /// This is here to force the test to be done whenever parent_buffer
        /// is accessed.
        Buffer const * parent() const { 
                // if parent_buffer is not loaded, then it has been unloaded,
                // which means that parent_buffer is an invalid pointer. So we
                // set it to null in that case.
                if (!theBufferList().isLoaded(parent_buffer))
                        parent_buffer = 0;
                return parent_buffer; 
        }
        ///
        void setParent(Buffer const * pb) {
                if (parent_buffer && pb && parent_buffer != pb)
                        LYXERR0("Warning: a buffer should not have two parents!");
                parent_buffer = pb;
        }
private:
        /// So we can force access via the accessors.
        mutable Buffer const * parent_buffer;
};


/// Creates the per buffer temporary directory
static FileName createBufferTmpDir()
{
        static int count;
        // We are in our own directory.  Why bother to mangle name?
        // In fact I wrote this code to circumvent a problematic behaviour
        // (bug?) of EMX mkstemp().
        FileName tmpfl(package().temp_dir().absFilename() + "/lyx_tmpbuf" +
                convert<string>(count++));

        if (!tmpfl.createDirectory(0777)) {
                throw ExceptionMessage(WarningException, _("Disk Error: "), bformat(
                        _("LyX could not create the temporary directory '%1$s' (Disk is full maybe?)"),
                        from_utf8(tmpfl.absFilename())));
        }
        return tmpfl;
}


Buffer::Impl::Impl(Buffer & parent, FileName const & file, bool readonly_)
        : lyx_clean(true), bak_clean(true), unnamed(false),
          read_only(readonly_), filename(file), file_fully_loaded(false),
          toc_backend(&parent), macro_lock(false), timestamp_(0),
          checksum_(0), wa_(0), undo_(parent), bibinfoCacheValid_(false),
          parent_buffer(0)
{
        temppath = createBufferTmpDir();
        lyxvc.setBuffer(&parent);
        if (use_gui)
                wa_ = new frontend::WorkAreaManager;
}


Buffer::Buffer(string const & file, bool readonly)
        : d(new Impl(*this, FileName(file), readonly)), gui_(0)
{
        LYXERR(Debug::INFO, "Buffer::Buffer()");

        d->inset = new InsetText(this);
        d->inset->setAutoBreakRows(true);
        d->inset->getText(0)->setMacrocontextPosition(par_iterator_begin());
}


Buffer::~Buffer()
{
        LYXERR(Debug::INFO, "Buffer::~Buffer()");
        // here the buffer should take care that it is
        // saved properly, before it goes into the void.

        // GuiView already destroyed
        gui_ = 0;

        if (isInternal()) {
                // No need to do additional cleanups for internal buffer.
                delete d;
                return;
        }

        // 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);
                // The child buffer might have been closed already.
                if (theBufferList().isLoaded(child))
                        theBufferList().releaseChild(this, child);
        }

        if (!isClean()) {
                docstring msg = _("LyX attempted to close a document that had unsaved changes!\n");
                msg += emergencyWrite();
                frontend::Alert::warning(_("Attempting to close changed document!"), msg);
        }
                
        // clear references to children in macro tables
        d->children_positions.clear();
        d->position_to_children.clear();

        if (!d->temppath.destroyDirectory()) {
                Alert::warning(_("Could not remove temporary directory"),
                        bformat(_("Could not remove the temporary directory %1$s"),
                        from_utf8(d->temppath.absFilename())));
        }

        // Remove any previewed LaTeX snippets associated with this buffer.
        thePreviews().removeLoader(*this);

        delete d;
}


void Buffer::changed() const
{
        if (d->wa_)
                d->wa_->redrawAll();
}


frontend::WorkAreaManager & Buffer::workAreaManager() const
{
        LASSERT(d->wa_, /**/);
        return *d->wa_;
}


Text & Buffer::text() const
{
        return d->inset->text();
}


Inset & Buffer::inset() const
{
        return *d->inset;
}


BufferParams & Buffer::params()
{
        return d->params;
}


BufferParams const & Buffer::params() const
{
        return d->params;
}


ParagraphList & Buffer::paragraphs()
{
        return text().paragraphs();
}


ParagraphList const & Buffer::paragraphs() const
{
        return text().paragraphs();
}


LyXVC & Buffer::lyxvc()
{
        return d->lyxvc;
}


LyXVC const & Buffer::lyxvc() const
{
        return d->lyxvc;
}


string const Buffer::temppath() const
{
        return d->temppath.absFilename();
}


TexRow & Buffer::texrow()
{
        return d->texrow;
}


TexRow const & Buffer::texrow() const
{
        return d->texrow;
}


TocBackend & Buffer::tocBackend() const
{
        return d->toc_backend;
}


Undo & Buffer::undo()
{
        return d->undo_;
}


string Buffer::latexName(bool const no_path) const
{
        FileName latex_name =
                makeLatexName(exportFileName());
        return no_path ? latex_name.onlyFileName()
                : latex_name.absFilename();
}


FileName Buffer::exportFileName() const
{
        docstring const branch_suffix =
                params().branchlist().getFilenameSuffix();
        if (branch_suffix.empty())
                return fileName();

        string const name = fileName().onlyFileNameWithoutExt()
                + to_utf8(branch_suffix);
        FileName res(fileName().onlyPath().absFilename() + "/" + name);
        res.changeExtension(fileName().extension());

        return res;
}


string Buffer::logName(LogType * type) const
{
        string const filename = latexName(false);

        if (filename.empty()) {
                if (type)
                        *type = latexlog;
                return string();
        }

        string const path = temppath();

        FileName const fname(addName(temppath(),
                                     onlyFilename(changeExtension(filename,
                                                                  ".log"))));

        // FIXME: how do we know this is the name of the build log?
        FileName const bname(
                addName(path, onlyFilename(
                        changeExtension(filename,
                                        formats.extension(bufferFormat()) + ".out"))));

        // Also consider the master buffer log file
        FileName masterfname = fname;
        LogType mtype;
        if (masterBuffer() != this) {
                string const mlogfile = masterBuffer()->logName(&mtype);
                masterfname = FileName(mlogfile);
        }

        // If no Latex log or Build log is newer, show Build log
        if (bname.exists() &&
            ((!fname.exists() && !masterfname.exists())
             || (fname.lastModified() < bname.lastModified()
                 && masterfname.lastModified() < bname.lastModified()))) {
                LYXERR(Debug::FILES, "Log name calculated as: " << bname);
                if (type)
                        *type = buildlog;
                return bname.absFilename();
        // If we have a newer master file log or only a master log, show this
        } else if (fname != masterfname
                   && (!fname.exists() && (masterfname.exists()
                   || fname.lastModified() < masterfname.lastModified()))) {
                LYXERR(Debug::FILES, "Log name calculated as: " << masterfname);
                if (type)
                        *type = mtype;
                return masterfname.absFilename();
        }
        LYXERR(Debug::FILES, "Log name calculated as: " << fname);
        if (type)
                        *type = latexlog;
        return fname.absFilename();
}


void Buffer::setReadonly(bool const flag)
{
        if (d->read_only != flag) {
                d->read_only = flag;
                setReadOnly(flag);
        }
}


void Buffer::setFileName(string const & newfile)
{
        d->filename = makeAbsPath(newfile);
        setReadonly(d->filename.isReadOnly());
        updateTitles();
}


int Buffer::readHeader(Lexer & lex)
{
        int unknown_tokens = 0;
        int line = -1;
        int begin_header_line = -1;

        // Initialize parameters that may be/go lacking in header:
        params().branchlist().clear();
        params().preamble.erase();
        params().options.erase();
        params().master.erase();
        params().float_placement.erase();
        params().paperwidth.erase();
        params().paperheight.erase();
        params().leftmargin.erase();
        params().rightmargin.erase();
        params().topmargin.erase();
        params().bottommargin.erase();
        params().headheight.erase();
        params().headsep.erase();
        params().footskip.erase();
        params().columnsep.erase();
        params().fontsCJK.erase();
        params().listings_params.clear();
        params().clearLayoutModules();
        params().clearRemovedModules();
        params().pdfoptions().clear();
        params().indiceslist().clear();
        params().backgroundcolor = lyx::rgbFromHexName("#ffffff");

        for (int i = 0; i < 4; ++i) {
                params().user_defined_bullet(i) = ITEMIZE_DEFAULTS[i];
                params().temp_bullet(i) = ITEMIZE_DEFAULTS[i];
        }

        ErrorList & errorList = d->errorLists["Parse"];

        while (lex.isOK()) {
                string token;
                lex >> token;

                if (token.empty())
                        continue;

                if (token == "\\end_header")
                        break;

                ++line;
                if (token == "\\begin_header") {
                        begin_header_line = line;
                        continue;
                }

                LYXERR(Debug::PARSER, "Handling document header token: `"
                                      << token << '\'');

                string unknown = params().readToken(lex, token, d->filename.onlyPath());
                if (!unknown.empty()) {
                        if (unknown[0] != '\\' && token == "\\textclass") {
                                Alert::warning(_("Unknown document class"),
                       bformat(_("Using the default document class, because the "
                                              "class %1$s is unknown."), from_utf8(unknown)));
                        } else {
                                ++unknown_tokens;
                                docstring const s = bformat(_("Unknown token: "
                                                                        "%1$s %2$s\n"),
                                                         from_utf8(token),
                                                         lex.getDocString());
                                errorList.push_back(ErrorItem(_("Document header error"),
                                        s, -1, 0, 0));
                        }
                }
        }
        if (begin_header_line) {
                docstring const s = _("\\begin_header is missing");
                errorList.push_back(ErrorItem(_("Document header error"),
                        s, -1, 0, 0));
        }

        params().makeDocumentClass();

        return unknown_tokens;
}


// Uwe C. Schroeder
// changed to be public and have one parameter
// Returns true if "\end_document" is not read (Asger)
bool Buffer::readDocument(Lexer & lex)
{
        ErrorList & errorList = d->errorLists["Parse"];
        errorList.clear();

        if (!lex.checkFor("\\begin_document")) {
                docstring const s = _("\\begin_document is missing");
                errorList.push_back(ErrorItem(_("Document header error"),
                        s, -1, 0, 0));
        }

        // we are reading in a brand new document
        LASSERT(paragraphs().empty(), /**/);

        readHeader(lex);

        if (params().outputChanges) {
                bool dvipost    = LaTeXFeatures::isAvailable("dvipost");
                bool xcolorulem = LaTeXFeatures::isAvailable("ulem") &&
                                  LaTeXFeatures::isAvailable("xcolor");

                if (!dvipost && !xcolorulem) {
                        Alert::warning(_("Changes not shown in LaTeX output"),
                                       _("Changes will not be highlighted in LaTeX output, "
                                         "because neither dvipost nor xcolor/ulem are installed.\n"
                                         "Please install these packages or redefine "
                                         "\\lyxadded and \\lyxdeleted in the LaTeX preamble."));
                } else if (!xcolorulem) {
                        Alert::warning(_("Changes not shown in LaTeX output"),
                                       _("Changes will not be highlighted in LaTeX output "
                                         "when using pdflatex, because xcolor and ulem are not installed.\n"
                                         "Please install both packages or redefine "
                                         "\\lyxadded and \\lyxdeleted in the LaTeX preamble."));
                }
        }

        if (!params().master.empty()) {
                FileName const master_file = makeAbsPath(params().master,
                           onlyPath(absFileName()));
                if (isLyXFilename(master_file.absFilename())) {
                        Buffer * master = 
                                checkAndLoadLyXFile(master_file, true);
                        if (master) {
                                // necessary e.g. after a reload
                                // to re-register the child (bug 5873)
                                // FIXME: clean up updateMacros (here, only
                                // child registering is needed).
                                master->updateMacros();
                                // set master as master buffer, but only
                                // if we are a real child
                                if (master->isChild(this))
                                        setParent(master);
                                // if the master is not fully loaded
                                // it is probably just loading this
                                // child. No warning needed then.
                                else if (master->isFullyLoaded())
                                        LYXERR0("The master '"
                                                << params().master
                                                << "' assigned to this document ("
                                                << absFileName()
                                                << ") does not include "
                                                "this document. Ignoring the master assignment.");
                        }
                }
        }
        
        // assure we have a default index
        params().indiceslist().addDefault(B_("Index"));

        // read main text
        bool const res = text().read(lex, errorList, d->inset);

        usermacros.clear();
        updateMacros();
        updateMacroInstances();
        return res;
}


bool Buffer::readString(string const & s)
{
        params().compressed = false;

        // remove dummy empty par
        paragraphs().clear();
        Lexer lex;
        istringstream is(s);
        lex.setStream(is);
        FileName const name = FileName::tempName("Buffer_readString");
        switch (readFile(lex, name, true)) {
        case failure:
                return false;
        case wrongversion: {
                // We need to call lyx2lyx, so write the input to a file
                ofstream os(name.toFilesystemEncoding().c_str());
                os << s;
                os.close();
                return readFile(name);
        }
        case success:
                break;
        }

        return true;
}


bool Buffer::readFile(FileName const & filename)
{
        FileName fname(filename);

        params().compressed = fname.isZippedFile();

        // remove dummy empty par
        paragraphs().clear();
        Lexer lex;
        lex.setFile(fname);
        if (readFile(lex, fname) != success)
                return false;

        return true;
}


bool Buffer::isFullyLoaded() const
{
        return d->file_fully_loaded;
}


void Buffer::setFullyLoaded(bool value)
{
        d->file_fully_loaded = value;
}


Buffer::ReadStatus Buffer::readFile(Lexer & lex, FileName const & filename,
                bool fromstring)
{
        LASSERT(!filename.empty(), /**/);

        // the first (non-comment) token _must_ be...
        if (!lex.checkFor("\\lyxformat")) {
                Alert::error(_("Document format failure"),
                             bformat(_("%1$s is not a readable LyX document."),
                                       from_utf8(filename.absFilename())));
                return failure;
        }

        string tmp_format;
        lex >> tmp_format;
        //lyxerr << "LyX Format: `" << tmp_format << '\'' << endl;
        // if present remove ".," from string.
        size_t dot = tmp_format.find_first_of(".,");
        //lyxerr << "           dot found at " << dot << endl;
        if (dot != string::npos)
                        tmp_format.erase(dot, 1);
        int const file_format = convert<int>(tmp_format);
        //lyxerr << "format: " << file_format << endl;

        // save timestamp and checksum of the original disk file, making sure
        // to not overwrite them with those of the file created in the tempdir
        // when it has to be converted to the current format.
        if (!d->checksum_) {
                // Save the timestamp and checksum of disk file. If filename is an
                // emergency file, save the timestamp and checksum of the original lyx file
                // because isExternallyModified will check for this file. (BUG4193)
                string diskfile = filename.absFilename();
                if (suffixIs(diskfile, ".emergency"))
                        diskfile = diskfile.substr(0, diskfile.size() - 10);
                saveCheckSum(FileName(diskfile));
        }

        if (file_format != LYX_FORMAT) {

                if (fromstring)
                        // lyx2lyx would fail
                        return wrongversion;

                FileName const tmpfile = FileName::tempName("Buffer_readFile");
                if (tmpfile.empty()) {
                        Alert::error(_("Conversion failed"),
                                     bformat(_("%1$s is from a different"
                                              " version of LyX, but a temporary"
                                              " file for converting it could"
                                              " not be created."),
                                              from_utf8(filename.absFilename())));
                        return failure;
                }
                FileName const lyx2lyx = libFileSearch("lyx2lyx", "lyx2lyx");
                if (lyx2lyx.empty()) {
                        Alert::error(_("Conversion script not found"),
                                     bformat(_("%1$s is from a different"
                                               " version of LyX, but the"
                                               " conversion script lyx2lyx"
                                               " could not be found."),
                                               from_utf8(filename.absFilename())));
                        return failure;
                }
                ostringstream command;
                command << os::python()
                        << ' ' << quoteName(lyx2lyx.toFilesystemEncoding())
                        << " -t " << convert<string>(LYX_FORMAT)
                        << " -o " << quoteName(tmpfile.toFilesystemEncoding())
                        << ' ' << quoteName(filename.toFilesystemEncoding());
                string const command_str = command.str();

                LYXERR(Debug::INFO, "Running '" << command_str << '\'');

                cmd_ret const ret = runCommand(command_str);
                if (ret.first != 0) {
                        Alert::error(_("Conversion script failed"),
                                     bformat(_("%1$s is from a different version"
                                              " of LyX, but the lyx2lyx script"
                                              " failed to convert it."),
                                              from_utf8(filename.absFilename())));
                        return failure;
                } else {
                        bool const ret = readFile(tmpfile);
                        // Do stuff with tmpfile name and buffer name here.
                        return ret ? success : failure;
                }

        }

        if (readDocument(lex)) {
                Alert::error(_("Document format failure"),
                             bformat(_("%1$s ended unexpectedly, which means"
                                                    " that it is probably corrupted."),
                                       from_utf8(filename.absFilename())));
        }

        d->file_fully_loaded = true;
        return success;
}


// Should probably be moved to somewhere else: BufferView? LyXView?
bool Buffer::save() const
{
        // We don't need autosaves in the immediate future. (Asger)
        resetAutosaveTimers();

        string const encodedFilename = d->filename.toFilesystemEncoding();

        FileName backupName;
        bool madeBackup = false;

        // make a backup if the file already exists
        if (lyxrc.make_backup && fileName().exists()) {
                backupName = FileName(absFileName() + '~');
                if (!lyxrc.backupdir_path.empty()) {
                        string const mangledName =
                                subst(subst(backupName.absFilename(), '/', '!'), ':', '!');
                        backupName = FileName(addName(lyxrc.backupdir_path,
                                                      mangledName));
                }
                if (fileName().copyTo(backupName)) {
                        madeBackup = true;
                } else {
                        Alert::error(_("Backup failure"),
                                     bformat(_("Cannot create backup file %1$s.\n"
                                               "Please check whether the directory exists and is writeable."),
                                             from_utf8(backupName.absFilename())));
                        //LYXERR(Debug::DEBUG, "Fs error: " << fe.what());
                }
        }

        // ask if the disk file has been externally modified (use checksum method)
        if (fileName().exists() && isExternallyModified(checksum_method)) {
                docstring const file = makeDisplayPath(absFileName(), 20);
                docstring text = bformat(_("Document %1$s has been externally modified. Are you sure "
                                                             "you want to overwrite this file?"), file);
                int const ret = Alert::prompt(_("Overwrite modified file?"),
                        text, 1, 1, _("&Overwrite"), _("&Cancel"));
                if (ret == 1)
                        return false;
        }

        if (writeFile(d->filename)) {
                markClean();
                return true;
        } else {
                // Saving failed, so backup is not backup
                if (madeBackup)
                        backupName.moveTo(d->filename);
                return false;
        }
}


bool Buffer::writeFile(FileName const & fname) const
{
        if (d->read_only && fname == d->filename)
                return false;

        bool retval = false;

        docstring const str = bformat(_("Saving document %1$s..."),
                makeDisplayPath(fname.absFilename()));
        message(str);

        if (params().compressed) {
                gz::ogzstream ofs(fname.toFilesystemEncoding().c_str(), ios::out|ios::trunc);
                retval = ofs && write(ofs);
        } else {
                ofstream ofs(fname.toFilesystemEncoding().c_str(), ios::out|ios::trunc);
                retval = ofs && write(ofs);
        }

        if (!retval) {
                message(str + _(" could not write file!"));
                return false;
        }

        removeAutosaveFile();

        saveCheckSum(d->filename);
        message(str + _(" done."));

        return true;
}


docstring Buffer::emergencyWrite()
{
        // No need to save if the buffer has not changed.
        if (isClean())
                return docstring();

        string const doc = isUnnamed() ? onlyFilename(absFileName()) : absFileName();

        docstring user_message = bformat(
                _("LyX: Attempting to save document %1$s\n"), from_utf8(doc));

        // We try to save three places:
        // 1) Same place as document. Unless it is an unnamed doc.
        if (!isUnnamed()) {
                string s = absFileName();
                s += ".emergency";
                LYXERR0("  " << s);
                if (writeFile(FileName(s))) {
                        markClean();
                        user_message += bformat(_("  Saved to %1$s. Phew.\n"), from_utf8(s));
                        return user_message;
                } else {
                        user_message += _("  Save failed! Trying again...\n");
                }
        }

        // 2) In HOME directory.
        string s = addName(package().home_dir().absFilename(), absFileName());
        s += ".emergency";
        lyxerr << ' ' << s << endl;
        if (writeFile(FileName(s))) {
                markClean();
                user_message += bformat(_("  Saved to %1$s. Phew.\n"), from_utf8(s));
                return user_message;
        }

        user_message += _("  Save failed! Trying yet again...\n");

        // 3) In "/tmp" directory.
        // MakeAbsPath to prepend the current
        // drive letter on OS/2
        s = addName(package().temp_dir().absFilename(), absFileName());
        s += ".emergency";
        lyxerr << ' ' << s << endl;
        if (writeFile(FileName(s))) {
                markClean();
                user_message += bformat(_("  Saved to %1$s. Phew.\n"), from_utf8(s));
                return user_message;
        }

        user_message += _("  Save failed! Bummer. Document is lost.");
        // Don't try again.
        markClean();
        return user_message;
}


bool Buffer::write(ostream & ofs) const
{
#ifdef HAVE_LOCALE
        // Use the standard "C" locale for file output.
        ofs.imbue(locale::classic());
#endif

        // The top of the file should not be written by params().

        // write out a comment in the top of the file
        ofs << "#LyX " << lyx_version
            << " created this file. For more info see http://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);

        ParIterator const end = const_cast<Buffer *>(this)->par_iterator_end();
        ParIterator it = const_cast<Buffer *>(this)->par_iterator_begin();
        for ( ; it != end; ++it)
                it->checkAuthors(params().authors());

        // now write out the buffer parameters.
        ofs << "\\begin_header\n";
        params().writeFile(ofs);
        ofs << "\\end_header\n";

        // write the text
        ofs << "\n\\begin_body\n";
        text().write(ofs);
        ofs << "\n\\end_body\n";

        // Write marker that shows file is complete
        ofs << "\\end_document" << endl;

        // Shouldn't really be needed....
        //ofs.close();

        // how to check if close went ok?
        // Following is an attempt... (BE 20001011)

        // good() returns false if any error occured, including some
        //        formatting error.
        // bad()  returns true if something bad happened in the buffer,
        //        which should include file system full errors.

        bool status = true;
        if (!ofs) {
                status = false;
                lyxerr << "File was not closed properly." << endl;
        }

        return status;
}


bool Buffer::makeLaTeXFile(FileName const & fname,
                           string const & original_path,
                           OutputParams const & runparams_in,
                           bool output_preamble, bool output_body) const
{
        OutputParams runparams = runparams_in;
        if (params().useXetex)
                runparams.flavor = OutputParams::XETEX;

        string const encoding = runparams.encoding->iconvName();
        LYXERR(Debug::LATEX, "makeLaTeXFile encoding: " << encoding << "...");

        ofdocstream ofs;
        try { ofs.reset(encoding); }
        catch (iconv_codecvt_facet_exception & e) {
                lyxerr << "Caught iconv exception: " << e.what() << endl;
                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;
        }
        if (!openFileWrite(ofs, fname))
                return false;

        //TexStream ts(ofs.rdbuf(), &texrow());
        ErrorList & errorList = d->errorLists["Export"];
        errorList.clear();
        bool failed_export = false;
        try {
                d->texrow.reset();
                writeLaTeXSource(ofs, original_path,
                      runparams, output_preamble, output_body);
        }
        catch (EncodingException & e) {
                odocstringstream ods;
                ods.put(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)"),
                                          ods.str(), 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.pos + 1));
                failed_export = true;
        }
        catch (iconv_codecvt_facet_exception & e) {
                errorList.push_back(ErrorItem(_("iconv conversion failed"),
                        _(e.what()), -1, 0, 0));
                failed_export = true;
        }
        catch (exception const & e) {
                errorList.push_back(ErrorItem(_("conversion failed"),
                        _(e.what()), -1, 0, 0));
                failed_export = true;
        }
        catch (...) {
                lyxerr << "Caught some really weird exception..." << endl;
                lyx_exit(1);
        }

        ofs.close();
        if (ofs.fail()) {
                failed_export = true;
                lyxerr << "File '" << fname << "' was not closed properly." << endl;
        }

        errors("Export");
        return !failed_export;
}


void Buffer::writeLaTeXSource(odocstream & os,
                           string const & original_path,
                           OutputParams const & runparams_in,
                           bool const output_preamble, bool const output_body) const
{
        // The child documents, if any, shall be already loaded at this point.

        OutputParams runparams = runparams_in;

        // Classify the unicode characters appearing in math insets
        Encodings::initUnicodeMath(*this);

        // validate the buffer.
        LYXERR(Debug::LATEX, "  Validating buffer...");
        LaTeXFeatures features(*this, params(), runparams);
        validate(features);
        LYXERR(Debug::LATEX, "  Buffer validation done.");

        // The starting paragraph of the coming rows is the
        // 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"
                        "%% Do not edit unless you really know what "
                        "you are doing.\n";
                d->texrow.newline();
                d->texrow.newline();
        }
        LYXERR(Debug::INFO, "lyx document header finished");

        // Don't move this behind the parent_buffer=0 code below,
        // because then the macros will not get the right "redefinition"
        // flag as they don't see the parent macros which are output before.
        updateMacros();

        // fold macros if possible, still with parent buffer as the
        // macros will be put in the prefix anyway.
        updateMacroInstances();

        // There are a few differences between nice LaTeX and usual files:
        // usual is \batchmode and has a
        // special input@path to allow the including of figures
        // with either \input or \includegraphics (what figinsets do).
        // input@path is set when the actual parameter
        // original_path is set. This is done for usual tex-file, but not
        // for nice-latex-file. (Matthias 250696)
        // Note that input@path is only needed for something the user does
        // in the preamble, included .tex files or ERT, files included by
        // LyX work without it.
        if (output_preamble) {
                if (!runparams.nice) {
                        // code for usual, NOT nice-latex-file
                        os << "\\batchmode\n"; // changed
                        // from \nonstopmode
                        d->texrow.newline();
                }
                if (!original_path.empty()) {
                        // FIXME UNICODE
                        // We don't know the encoding of inputpath
                        docstring const inputpath = from_utf8(latex_path(original_path));
                        os << "\\makeatletter\n"
                           << "\\def\\input@path{{"
                           << inputpath << "/}}\n"
                           << "\\makeatother\n";
                        d->texrow.newline();
                        d->texrow.newline();
                        d->texrow.newline();
                }

                // get parent macros (if this buffer has a parent) which will be
                // written at the document begin further down.
                MacroSet parentMacros;
                listParentMacros(parentMacros, features);

                // Write the preamble
                runparams.use_babel = params().writeLaTeX(os, features, d->texrow);

                runparams.use_japanese = features.isRequired("japanese");

                if (!output_body)
                        return;

                // make the body.
                os << "\\begin{document}\n";
                d->texrow.newline();

                // output the parent macros
                MacroSet::iterator it = parentMacros.begin();
                MacroSet::iterator end = parentMacros.end();
                for (; it != end; ++it)
                        (*it)->write(os, true);
        } // output_preamble

        d->texrow.start(paragraphs().begin()->id(), 0);

        LYXERR(Debug::INFO, "preamble finished, now the body.");

        // if we are doing a real file with body, even if this is the
        // child of some other buffer, let's cut the link here.
        // This happens for example if only a child document is printed.
        Buffer const * save_parent = 0;
        if (output_preamble) {
                save_parent = d->parent();
                d->setParent(0);
        }

        // the real stuff
        latexParagraphs(*this, text(), os, d->texrow, runparams);

        // Restore the parenthood if needed
        if (output_preamble)
                d->setParent(save_parent);

        // add this just in case after all the paragraphs
        os << endl;
        d->texrow.newline();

        if (output_preamble) {
                os << "\\end{document}\n";
                d->texrow.newline();
                LYXERR(Debug::LATEX, "makeLaTeXFile...done");
        } else {
                LYXERR(Debug::LATEX, "LaTeXFile for inclusion made.");
        }
        runparams_in.encoding = runparams.encoding;

        // Just to be sure. (Asger)
        d->texrow.newline();

        LYXERR(Debug::INFO, "Finished making LaTeX file.");
        LYXERR(Debug::INFO, "Row count was " << d->texrow.rows() - 1 << '.');
}


bool Buffer::isLatex() const
{
        return params().documentClass().outputType() == LATEX;
}


bool Buffer::isLiterate() const
{
        return params().documentClass().outputType() == LITERATE;
}


bool Buffer::isDocBook() const
{
        return params().documentClass().outputType() == DOCBOOK;
}


void Buffer::makeDocBookFile(FileName const & fname,
                              OutputParams const & runparams,
                              bool const body_only) const
{
        LYXERR(Debug::LATEX, "makeDocBookFile...");

        ofdocstream ofs;
        if (!openFileWrite(ofs, fname))
                return;

        writeDocBookSource(ofs, fname.absFilename(), runparams, body_only);

        ofs.close();
        if (ofs.fail())
                lyxerr << "File '" << fname << "' was not closed properly." << endl;
}


void Buffer::writeDocBookSource(odocstream & os, string const & fname,
                             OutputParams const & runparams,
                             bool const only_body) const
{
        LaTeXFeatures features(*this, params(), runparams);
        validate(features);

        d->texrow.reset();

        DocumentClass const & tclass = params().documentClass();
        string const top_element = tclass.latexname();

        if (!only_body) {
                if (runparams.flavor == OutputParams::XML)
                        os << "<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n";

                // FIXME UNICODE
                os << "<!DOCTYPE " << from_ascii(top_element) << ' ';

                // FIXME UNICODE
                if (! tclass.class_header().empty())
                        os << from_ascii(tclass.class_header());
                else if (runparams.flavor == OutputParams::XML)
                        os << "PUBLIC \"-//OASIS//DTD DocBook XML//EN\" "
                            << "\"http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd\"";
                else
                        os << " PUBLIC \"-//OASIS//DTD DocBook V4.2//EN\"";

                docstring preamble = from_utf8(params().preamble);
                if (runparams.flavor != OutputParams::XML ) {
                        preamble += "<!ENTITY % output.print.png \"IGNORE\">\n";
                        preamble += "<!ENTITY % output.print.pdf \"IGNORE\">\n";
                        preamble += "<!ENTITY % output.print.eps \"IGNORE\">\n";
                        preamble += "<!ENTITY % output.print.bmp \"IGNORE\">\n";
                }

                string const name = runparams.nice
                        ? changeExtension(absFileName(), ".sgml") : fname;
                preamble += features.getIncludedFiles(name);
                preamble += features.getLyXSGMLEntities();

                if (!preamble.empty()) {
                        os << "\n [ " << preamble << " ]";
                }
                os << ">\n\n";
        }

        string top = top_element;
        top += " lang=\"";
        if (runparams.flavor == OutputParams::XML)
                top += params().language->code();
        else
                top += params().language->code().substr(0, 2);
        top += '"';

        if (!params().options.empty()) {
                top += ' ';
                top += params().options;
        }

        os << "<!-- " << ((runparams.flavor == OutputParams::XML)? "XML" : "SGML")
            << " file was created by LyX " << lyx_version
            << "\n  See http://www.lyx.org/ for more information -->\n";

        params().documentClass().counters().reset();

        updateMacros();

        sgml::openTag(os, top);
        os << '\n';
        docbookParagraphs(text(), *this, os, runparams);
        sgml::closeTag(os, top_element);
}


void Buffer::makeLyXHTMLFile(FileName const & fname,
                              OutputParams const & runparams,
                              bool const body_only) const
{
        LYXERR(Debug::LATEX, "makeLyXHTMLFile...");

        ofdocstream ofs;
        if (!openFileWrite(ofs, fname))
                return;

        writeLyXHTMLSource(ofs, runparams, body_only);

        ofs.close();
        if (ofs.fail())
                lyxerr << "File '" << fname << "' was not closed properly." << endl;
}


void Buffer::writeLyXHTMLSource(odocstream & os,
                             OutputParams const & runparams,
                             bool const only_body) const
{
        LaTeXFeatures features(*this, params(), runparams);
        validate(features);

        d->texrow.reset();

        if (!only_body) {
                os << "<!DOCTYPE html PUBLIC \"-//W3C//DTD XHTML 1.0 Strict//EN\"" <<
                        " \"http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd\">\n";
                // FIXME Language should be set properly.
                os << "<html xmlns=\"http://www.w3.org/1999/xhtml\" xml:lang=\"en\" lang=\"en\">\n";
                // FIXME Header
                os << "<head>\n";
                // FIXME Presumably need to set this right
                os << "<meta http-equiv=\"Content-type\" content=\"text/html;charset=UTF-8\" />\n";
                // FIXME Get this during validation? What about other meta-data?
                os << "<title>TBA</title>\n";

                os << features.getTClassHTMLPreamble();

                os << '\n';

                docstring const styleinfo = features.getTClassHTMLStyles();
                if (!styleinfo.empty()) {
                        os << "<style type='text/css'>\n";
                        os << styleinfo;
                        os << "</style>\n";
                }
                os << "</head>\n<body>\n";
        }

        params().documentClass().counters().reset();
        xhtmlParagraphs(text(), *this, os, runparams);
        if (!only_body)
                os << "</body>\n</html>\n";
}


// chktex should be run with these flags disabled: 3, 22, 25, 30, 38(?)
// Other flags: -wall -v0 -x
int Buffer::runChktex()
{
        setBusy(true);

        // get LaTeX-Filename
        FileName const path(temppath());
        string const name = addName(path.absFilename(), latexName());
        string const org_path = filePath();

        PathChanger p(path); // path to LaTeX file
        message(_("Running chktex..."));

        // Generate the LaTeX file if neccessary
        OutputParams runparams(&params().encoding());
        runparams.flavor = OutputParams::LATEX;
        runparams.nice = false;
        makeLaTeXFile(FileName(name), org_path, runparams);

        TeXErrors terr;
        Chktex chktex(lyxrc.chktex_command, onlyFilename(name), filePath());
        int const res = chktex.run(terr); // run chktex

        if (res == -1) {
                Alert::error(_("chktex failure"),
                             _("Could not run chktex successfully."));
        } else if (res > 0) {
                ErrorList & errlist = d->errorLists["ChkTeX"];
                errlist.clear();
                bufferErrors(terr, errlist);
        }

        setBusy(false);

        errors("ChkTeX");

        return res;
}


void Buffer::validate(LaTeXFeatures & features) const
{
        params().validate(features);

        updateMacros();

        for_each(paragraphs().begin(), paragraphs().end(),
                 boost::bind(&Paragraph::validate, _1, boost::ref(features)));

        if (lyxerr.debugging(Debug::LATEX)) {
                features.showStruct();
        }
}


void Buffer::getLabelList(vector<docstring> & list) const
{
        // If this is a child document, use the parent's list instead.
        Buffer const * const pbuf = d->parent();
        if (pbuf) {
                pbuf->getLabelList(list);
                return;
        }

        list.clear();
        Toc & toc = d->toc_backend.toc("label");
        TocIterator toc_it = toc.begin();
        TocIterator 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
{
        // If this is a child document, use the parent's cache instead.
        Buffer const * const pbuf = d->parent();
        if (pbuf && scope != UpdateChildOnly) {
                pbuf->updateBibfilesCache();
                return;
        }

        d->bibfilesCache_.clear();
        for (InsetIterator it = inset_iterator_begin(inset()); it; ++it) {
                if (it->lyxCode() == BIBTEX_CODE) {
                        InsetBibtex const & inset =
                                static_cast<InsetBibtex const &>(*it);
                        support::FileNameList const bibfiles = inset.getBibFiles();
                        d->bibfilesCache_.insert(d->bibfilesCache_.end(),
                                bibfiles.begin(),
                                bibfiles.end());
                } else if (it->lyxCode() == INCLUDE_CODE) {
                        InsetInclude & inset =
                                static_cast<InsetInclude &>(*it);
                        inset.updateBibfilesCache();
                        support::FileNameList const & bibfiles =
                                        inset.getBibfilesCache();
                        d->bibfilesCache_.insert(d->bibfilesCache_.end(),
                                bibfiles.begin(),
                                bibfiles.end());
                }
        }
        // the bibinfo cache is now invalid
        d->bibinfoCacheValid_ = false;
}


void Buffer::invalidateBibinfoCache()
{
        d->bibinfoCacheValid_ = false;
}


support::FileNameList const & Buffer::getBibfilesCache(UpdateScope scope) const
{
        // If this is a child document, use the parent's cache instead.
        Buffer const * const pbuf = d->parent();
        if (pbuf && scope != UpdateChildOnly)
                return pbuf->getBibfilesCache();

        // We update the cache when first used instead of at loading time.
        if (d->bibfilesCache_.empty())
                const_cast<Buffer *>(this)->updateBibfilesCache(scope);

        return d->bibfilesCache_;
}


BiblioInfo const & Buffer::masterBibInfo() const
{
        // if this is a child document and the parent is already loaded
        // use the parent's list instead  [ale990412]
        Buffer const * const tmp = masterBuffer();
        LASSERT(tmp, /**/);
        if (tmp != this)
                return tmp->masterBibInfo();
        return localBibInfo();
}


BiblioInfo const & Buffer::localBibInfo() const
{
        if (d->bibinfoCacheValid_) {
                support::FileNameList const & bibfilesCache = getBibfilesCache();
                // compare the cached timestamps with the actual ones.
                support::FileNameList::const_iterator ei = bibfilesCache.begin();
                support::FileNameList::const_iterator en = bibfilesCache.end();
                for (; ei != en; ++ ei) {
                        time_t lastw = ei->lastModified();
                        if (lastw != d->bibfileStatus_[*ei]) {
                                d->bibinfoCacheValid_ = false;
                                d->bibfileStatus_[*ei] = lastw;
                                break;
                        }
                }
        }

        if (!d->bibinfoCacheValid_) {
                d->bibinfo_.clear();
                for (InsetIterator it = inset_iterator_begin(inset()); it; ++it)
                        it->fillWithBibKeys(d->bibinfo_, it);
                d->bibinfoCacheValid_ = true;
        }
        return d->bibinfo_;
}


bool Buffer::isDepClean(string const & name) const
{
        DepClean::const_iterator const it = d->dep_clean.find(name);
        if (it == d->dep_clean.end())
                return true;
        return it->second;
}


void Buffer::markDepClean(string const & name)
{
        d->dep_clean[name] = true;
}


bool Buffer::getStatus(FuncRequest const & cmd, FuncStatus & flag)
{
        if (isInternal()) {
                // FIXME? if there is an Buffer LFUN that can be dispatched even
                // if internal, put a switch '(cmd.action)' here.
                return false;
        }

        bool enable = true;

        switch (cmd.action) {

                case LFUN_BUFFER_TOGGLE_READ_ONLY:
                        flag.setOnOff(isReadonly());
                        break;

                // FIXME: There is need for a command-line import.
                //case LFUN_BUFFER_IMPORT:

                case LFUN_BUFFER_AUTO_SAVE:
                        break;

                case LFUN_BUFFER_EXPORT_CUSTOM:
                        // FIXME: Nothing to check here?
                        break;

                case LFUN_BUFFER_EXPORT: {
                        docstring const arg = cmd.argument();
                        enable = arg == "custom" || isExportable(to_utf8(arg));
                        if (!enable)
                                flag.message(bformat(
                                        _("Don't know how to export to format: %1$s"), arg));
                        break;
                }

                case LFUN_MASTER_BUFFER_UPDATE:
                case LFUN_MASTER_BUFFER_VIEW: 
                        enable = parent() != 0;
                        break;
                case LFUN_BUFFER_UPDATE:
                case LFUN_BUFFER_VIEW: {
                        string format = to_utf8(cmd.argument());
                        if (cmd.argument().empty())
                                format = getDefaultOutputFormat();
                        typedef vector<Format const *> Formats;
                        Formats formats;
                        formats = exportableFormats(true);
                        Formats::const_iterator fit = formats.begin();
                        Formats::const_iterator end = formats.end();
                        enable = false;
                        for (; fit != end ; ++fit) {
                                if ((*fit)->name() == format)
                                        enable = true;
                        }
                        break;
                }
                case LFUN_BUFFER_CHKTEX:
                        enable = isLatex() && !lyxrc.chktex_command.empty();
                        break;

                case LFUN_BUILD_PROGRAM:
                        enable = isExportable("program");
                        break;

                case LFUN_BRANCH_ACTIVATE: 
                case LFUN_BRANCH_DEACTIVATE: {
                        BranchList const & branchList = params().branchlist();
                        docstring const branchName = cmd.argument();
                        enable = !branchName.empty() && branchList.find(branchName);
                        break;
                }

                case LFUN_BRANCH_ADD:
                case LFUN_BRANCHES_RENAME:
                case LFUN_BUFFER_PRINT:
                        // if no Buffer is present, then of course we won't be called!
                        break;

                case LFUN_BUFFER_LANGUAGE:
                        enable = !isReadonly();
                        break;

                default:
                        return false;
        }
        flag.setEnabled(enable);
        return true;
}


void Buffer::dispatch(string const & command, DispatchResult & result)
{
        return dispatch(lyxaction.lookupFunc(command), result);
}


// NOTE We can end up here even if we have no GUI, because we are called
// by LyX::exec to handled command-line requests. So we may need to check 
// whether we have a GUI or not. The boolean use_gui holds this information.
void Buffer::dispatch(FuncRequest const & func, DispatchResult & dr)
{
        if (isInternal()) {
                // FIXME? if there is an Buffer LFUN that can be dispatched even
                // if internal, put a switch '(cmd.action)' here.
                dr.dispatched(false);
                return;
        }
        string const argument = to_utf8(func.argument());
        // We'll set this back to false if need be.
        bool dispatched = true;
        undo().beginUndoGroup();

        switch (func.action) {
        case LFUN_BUFFER_TOGGLE_READ_ONLY:
                if (lyxvc().inUse())
                        lyxvc().toggleReadOnly();
                else
                        setReadonly(!isReadonly());
                break;

        case LFUN_BUFFER_EXPORT: {
                if (argument == "custom") {
                        lyx::dispatch(FuncRequest(LFUN_DIALOG_SHOW, "sendto"));
                        break;
                }
                doExport(argument, false);
                bool success = doExport(argument, false);
                dr.setError(success);
                if (!success)
                        dr.setMessage(bformat(_("Error exporting to format: %1$s."), 
                                              func.argument()));
                break;
        }

        case LFUN_BUFFER_UPDATE: {
                string format = argument;
                if (argument.empty())
                        format = getDefaultOutputFormat();
                doExport(format, true);
                break;
        }

        case LFUN_BUFFER_VIEW: {
                string format = argument;
                if (argument.empty())
                        format = getDefaultOutputFormat();
                preview(format);
                break;
        }

        case LFUN_MASTER_BUFFER_UPDATE: {
                string format = argument;
                if (argument.empty())
                        format = masterBuffer()->getDefaultOutputFormat();
                masterBuffer()->doExport(format, true);
                break;
        }

        case LFUN_MASTER_BUFFER_VIEW: {
                string format = argument;
                if (argument.empty())
                        format = masterBuffer()->getDefaultOutputFormat();
                masterBuffer()->preview(format);
                break;
        }

        case LFUN_BUILD_PROGRAM:
                doExport("program", true);
                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);
                if (!format) {
                        lyxerr << "Format \"" << format_name
                                << "\" not recognized!"
                                << endl;
                        break;
                }

                // The name of the file created by the conversion process
                string filename;

                // Output to filename
                if (format->name() == "lyx") {
                        string const latexname = latexName(false);
                        filename = changeExtension(latexname,
                                format->extension());
                        filename = addName(temppath(), filename);

                        if (!writeFile(FileName(filename)))
                                break;

                } else {
                        doExport(format_name, true, filename);
                }

                // Substitute $$FName for filename
                if (!contains(command, "$$FName"))
                        command = "( " + command + " ) < $$FName";
                command = subst(command, "$$FName", filename);

                // Execute the command in the background
                Systemcall call;
                call.startscript(Systemcall::DontWait, command);
                break;
        }

        // FIXME: There is need for a command-line import.
        /*
        case LFUN_BUFFER_IMPORT:
                doImport(argument);
                break;
        */

        case LFUN_BUFFER_AUTO_SAVE:
                autoSave();
                break;

        case LFUN_BRANCH_ADD: {
                docstring const branch_name = func.argument();
                if (branch_name.empty()) {
                        dispatched = false;
                        break;
                }
                BranchList & branch_list = params().branchlist();
                Branch * branch = branch_list.find(branch_name);
                if (branch) {
                        LYXERR0("Branch " << branch_name << " already exists.");
                        dr.setError(true);
                        docstring const msg = 
                                bformat(_("Branch \"%1$s\" already exists."), branch_name);
                        dr.setMessage(msg);
                } else {
                        branch_list.add(branch_name);
                        branch = branch_list.find(branch_name);
                        string const x11hexname = X11hexname(branch->color());
                        docstring const str = branch_name + ' ' + from_ascii(x11hexname);
                        lyx::dispatch(FuncRequest(LFUN_SET_COLOR, str));        
                        dr.setError(false);
                        dr.update(Update::Force);
                }
                break;
        }

        case LFUN_BRANCH_ACTIVATE:
        case LFUN_BRANCH_DEACTIVATE: {
                BranchList & branchList = params().branchlist();
                docstring const branchName = func.argument();
                // the case without a branch name is handled elsewhere
                if (branchName.empty()) {
                        dispatched = false;
                        break;
                }
                Branch * branch = branchList.find(branchName);
                if (!branch) {
                        LYXERR0("Branch " << branchName << " does not exist.");
                        dr.setError(true);
                        docstring const msg = 
                                bformat(_("Branch \"%1$s\" does not exist."), branchName);
                        dr.setMessage(msg);
                } else {
                        branch->setSelected(func.action == LFUN_BRANCH_ACTIVATE);
                        dr.setError(false);
                        dr.update(Update::Force);
                }
                break;
        }

        case LFUN_BRANCHES_RENAME: {
                if (func.argument().empty())
                        break;

                docstring const oldname = from_utf8(func.getArg(0));
                docstring const newname = from_utf8(func.getArg(1));
                InsetIterator it  = inset_iterator_begin(inset());
                InsetIterator const end = inset_iterator_end(inset());
                bool success = false;
                for (; it != end; ++it) {
                        if (it->lyxCode() == BRANCH_CODE) {
                                InsetBranch & ins = static_cast<InsetBranch &>(*it);
                                if (ins.branch() == oldname) {
                                        undo().recordUndo(it);
                                        ins.rename(newname);
                                        success = true;
                                        continue;
                                }
                        }
                        if (it->lyxCode() == INCLUDE_CODE) {
                                // get buffer of external file
                                InsetInclude const & ins =
                                        static_cast<InsetInclude const &>(*it);
                                Buffer * child = ins.getChildBuffer();
                                if (!child)
                                        continue;
                                child->dispatch(func, dr);
                        }
                }

                if (success)
                        dr.update(Update::Force);
                break;
        }

        case LFUN_BUFFER_PRINT: {
                // we'll assume there's a problem until we succeed
                dr.setError(true); 
                string target = func.getArg(0);
                string target_name = func.getArg(1);
                string command = func.getArg(2);

                if (target.empty()
                    || target_name.empty()
                    || command.empty()) {
                        LYXERR0("Unable to parse " << func.argument());
                        docstring const msg = 
                                bformat(_("Unable to parse \"%1$s\""), func.argument());
                        dr.setMessage(msg);
                        break;
                }
                if (target != "printer" && target != "file") {
                        LYXERR0("Unrecognized target \"" << target << '"');
                        docstring const msg = 
                                bformat(_("Unrecognized target \"%1$s\""), from_utf8(target));
                        dr.setMessage(msg);
                        break;
                }

                if (!doExport("dvi", true)) {
                        showPrintError(absFileName());
                        dr.setMessage(_("Error exporting to DVI."));
                        break;
                }

                // Push directory path.
                string const path = temppath();
                // Prevent the compiler from optimizing away p
                FileName pp(path);
                PathChanger p(pp);

                // there are three cases here:
                // 1. we print to a file
                // 2. we print directly to a printer
                // 3. we print using a spool command (print to file first)
                Systemcall one;
                int res = 0;
                string const dviname = changeExtension(latexName(true), "dvi");

                if (target == "printer") {
                        if (!lyxrc.print_spool_command.empty()) {
                                // case 3: print using a spool
                                string const psname = changeExtension(dviname,".ps");
                                command += ' ' + lyxrc.print_to_file
                                        + quoteName(psname)
                                        + ' '
                                        + quoteName(dviname);

                                string command2 = lyxrc.print_spool_command + ' ';
                                if (target_name != "default") {
                                        command2 += lyxrc.print_spool_printerprefix
                                                + target_name
                                                + ' ';
                                }
                                command2 += quoteName(psname);
                                // First run dvips.
                                // If successful, then spool command
                                res = one.startscript(Systemcall::Wait, command);

                                if (res == 0) {
                                        // If there's no GUI, we have to wait on this command. Otherwise,
                                        // LyX deletes the temporary directory, and with it the spooled
                                        // file, before it can be printed!!
                                        Systemcall::Starttype stype = use_gui ?
                                                Systemcall::DontWait : Systemcall::Wait;
                                        res = one.startscript(stype, command2);
                                }
                        } else {
                                // case 2: print directly to a printer
                                if (target_name != "default")
                                        command += ' ' + lyxrc.print_to_printer + target_name + ' ';
                                // as above....
                                Systemcall::Starttype stype = use_gui ?
                                        Systemcall::DontWait : Systemcall::Wait;
                                res = one.startscript(stype, command + quoteName(dviname));
                        }

                } else {
                        // case 1: print to a file
                        FileName const filename(makeAbsPath(target_name, filePath()));
                        FileName const dvifile(makeAbsPath(dviname, path));
                        if (filename.exists()) {
                                docstring text = bformat(
                                        _("The file %1$s already exists.\n\n"
                                          "Do you want to overwrite that file?"),
                                        makeDisplayPath(filename.absFilename()));
                                if (Alert::prompt(_("Overwrite file?"),
                                                  text, 0, 1, _("&Overwrite"), _("&Cancel")) != 0)
                                        break;
                        }
                        command += ' ' + lyxrc.print_to_file
                                + quoteName(filename.toFilesystemEncoding())
                                + ' '
                                + quoteName(dvifile.toFilesystemEncoding());
                        // as above....
                        Systemcall::Starttype stype = use_gui ?
                                Systemcall::DontWait : Systemcall::Wait;
                        res = one.startscript(stype, command);
                }

                if (res == 0) 
                        dr.setError(false);
                else {
                        dr.setMessage(_("Error running external commands."));
                        showPrintError(absFileName());
                }
                break;
        }

        case LFUN_BUFFER_LANGUAGE: {
                Language const * oldL = params().language;
                Language const * newL = languages.getLanguage(argument);
                if (!newL || oldL == newL)
                        break;
                if (oldL->rightToLeft() == newL->rightToLeft() && !isMultiLingual())
                        changeLanguage(oldL, newL);
                break;
        }

        default:
                dispatched = false;
                break;
        }
        dr.dispatched(dispatched);
        undo().endUndoGroup();
}


void Buffer::changeLanguage(Language const * from, Language const * to)
{
        LASSERT(from, /**/);
        LASSERT(to, /**/);

        for_each(par_iterator_begin(),
                 par_iterator_end(),
                 bind(&Paragraph::changeLanguage, _1, params(), from, to));
}


bool Buffer::isMultiLingual() const
{
        ParConstIterator end = par_iterator_end();
        for (ParConstIterator it = par_iterator_begin(); it != end; ++it)
                if (it->isMultiLingual(params()))
                        return true;

        return false;
}


DocIterator Buffer::getParFromID(int const id) const
{
        Buffer * buf = const_cast<Buffer *>(this);
        if (id < 0) {
                // John says this is called with id == -1 from undo
                lyxerr << "getParFromID(), id: " << id << endl;
                return doc_iterator_end(buf);
        }

        for (DocIterator it = doc_iterator_begin(buf); !it.atEnd(); it.forwardPar())
                if (it.paragraph().id() == id)
                        return it;

        return doc_iterator_end(buf);
}


bool Buffer::hasParWithID(int const id) const
{
        return !getParFromID(id).atEnd();
}


ParIterator Buffer::par_iterator_begin()
{
        return ParIterator(doc_iterator_begin(this));
}


ParIterator Buffer::par_iterator_end()
{
        return ParIterator(doc_iterator_end(this));
}


ParConstIterator Buffer::par_iterator_begin() const
{
        return ParConstIterator(doc_iterator_begin(this));
}


ParConstIterator Buffer::par_iterator_end() const
{
        return ParConstIterator(doc_iterator_end(this));
}


Language const * Buffer::language() const
{
        return params().language;
}


docstring const Buffer::B_(string const & l10n) const
{
        return params().B_(l10n);
}


bool Buffer::isClean() const
{
        return d->lyx_clean;
}


bool Buffer::isBakClean() const
{
        return d->bak_clean;
}


bool Buffer::isExternallyModified(CheckMethod method) const
{
        LASSERT(d->filename.exists(), /**/);
        // if method == timestamp, check timestamp before checksum
        return (method == checksum_method
                || d->timestamp_ != d->filename.lastModified())
                && d->checksum_ != d->filename.checksum();
}


void Buffer::saveCheckSum(FileName const & file) const
{
        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;
        }
}


void Buffer::markClean() const
{
        if (!d->lyx_clean) {
                d->lyx_clean = true;
                updateTitles();
        }
        // if the .lyx file has been saved, we don't need an
        // autosave
        d->bak_clean = true;
}


void Buffer::markBakClean() const
{
        d->bak_clean = true;
}


void Buffer::setUnnamed(bool flag)
{
        d->unnamed = flag;
}


bool Buffer::isUnnamed() const
{
        return d->unnamed;
}


/// \note
/// Don't check unnamed, here: isInternal() is used in
/// newBuffer(), where the unnamed flag has not been set by anyone
/// yet. Also, for an internal buffer, there should be no need for
/// retrieving fileName() nor for checking if it is unnamed or not.
bool Buffer::isInternal() const
{
        return fileName().extension() == "internal";
}


void Buffer::markDirty()
{
        if (d->lyx_clean) {
                d->lyx_clean = false;
                updateTitles();
        }
        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;
}


FileName Buffer::fileName() const
{
        return d->filename;
}


string Buffer::absFileName() const
{
        return d->filename.absFilename();
}


string Buffer::filePath() const
{
        return d->filename.onlyPath().absFilename() + "/";
}


bool Buffer::isReadonly() const
{
        return d->read_only;
}


void Buffer::setParent(Buffer const * buffer)
{
        // Avoids recursive include.
        d->setParent(buffer == this ? 0 : buffer);
        updateMacros();
}


Buffer const * Buffer::parent() const
{
        return d->parent();
}


void Buffer::collectRelatives(BufferSet & bufs) const
{
        bufs.insert(this);
        if (parent())
                parent()->collectRelatives(bufs);

        // loop over children
        Impl::BufferPositionMap::iterator it = d->children_positions.begin();
        Impl::BufferPositionMap::iterator end = d->children_positions.end();
        for (; it != end; ++it)
                bufs.insert(const_cast<Buffer *>(it->first));
}


std::vector<Buffer const *> Buffer::allRelatives() const
{
        BufferSet bufs;
        collectRelatives(bufs);
        BufferSet::iterator it = bufs.begin();
        std::vector<Buffer const *> ret;
        for (; it != bufs.end(); ++it)
                ret.push_back(*it);
        return ret;
}


Buffer const * Buffer::masterBuffer() const
{
        Buffer const * const pbuf = d->parent();
        if (!pbuf)
                return this;

        return pbuf->masterBuffer();
}


bool Buffer::isChild(Buffer * child) const
{
        return d->children_positions.find(child) != d->children_positions.end();
}


DocIterator Buffer::firstChildPosition(Buffer const * child)
{
        Impl::BufferPositionMap::iterator it;
        it = d->children_positions.find(child);
        if (it == d->children_positions.end())
                return DocIterator(this);
        return it->second;
}


std::vector<Buffer *> Buffer::getChildren(bool grand_children) const
{
        std::vector<Buffer *> clist;
        // 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);
                clist.push_back(child);
                if (grand_children) {
                        // there might be grandchildren
                        std::vector<Buffer *> glist = child->getChildren();
                        for (vector<Buffer *>::const_iterator git = glist.begin();
                                 git != glist.end(); ++git)
                                clist.push_back(*git);
                }
        }
        return clist;
}


template<typename M>
typename M::iterator greatest_below(M & m, typename M::key_type const & x)
{
        if (m.empty())
                return m.end();

        typename M::iterator it = m.lower_bound(x);
        if (it == m.begin())
                return m.end();

        it--;
        return it;
}


MacroData const * Buffer::getBufferMacro(docstring const & name,
                                         DocIterator const & pos) const
{
        LYXERR(Debug::MACROS, "Searching for " << to_ascii(name) << " at " << pos);

        // if paragraphs have no macro context set, pos will be empty
        if (pos.empty())
                return 0;

        // we haven't found anything yet
        DocIterator bestPos = par_iterator_begin();
        MacroData const * bestData = 0;

        // find macro definitions for name
        Impl::NamePositionScopeMacroMap::iterator nameIt
                = d->macros.find(name);
        if (nameIt != d->macros.end()) {
                // find last definition in front of pos or at pos itself
                Impl::PositionScopeMacroMap::const_iterator it
                        = greatest_below(nameIt->second, pos);
                if (it != nameIt->second.end()) {
                        while (true) {
                                // scope ends behind pos?
                                if (pos < it->second.first) {
                                        // Looks good, remember this. If there
                                        // is no external macro behind this,
                                        // we found the right one already.
                                        bestPos = it->first;
                                        bestData = &it->second.second;
                                        break;
                                }

                                // try previous macro if there is one
                                if (it == nameIt->second.begin())
                                        break;
                                it--;
                        }
                }
        }

        // find macros in included files
        Impl::PositionScopeBufferMap::const_iterator it
                = greatest_below(d->position_to_children, pos);
        if (it == d->position_to_children.end())
                // no children before
                return bestData;

        while (true) {
                // do we know something better (i.e. later) already?
                if (it->first < bestPos )
                        break;

                // scope ends behind pos?
                if (pos < it->second.first) {
                        // look for macro in external file
                        d->macro_lock = true;
                        MacroData const * data
                        = it->second.second->getMacro(name, false);
                        d->macro_lock = false;
                        if (data) {
                                bestPos = it->first;
                                bestData = data;
                                break;
                        }
                }

                // try previous file if there is one
                if (it == d->position_to_children.begin())
                        break;
                --it;
        }

        // return the best macro we have found
        return bestData;
}


MacroData const * Buffer::getMacro(docstring const & name,
        DocIterator const & pos, bool global) const
{
        if (d->macro_lock)
                return 0;

        // query buffer macros
        MacroData const * data = getBufferMacro(name, pos);
        if (data != 0)
                return data;

        // If there is a master buffer, query that
        Buffer const * const pbuf = d->parent();
        if (pbuf) {
                d->macro_lock = true;
                MacroData const * macro = pbuf->getMacro(
                        name, *this, false);
                d->macro_lock = false;
                if (macro)
                        return macro;
        }

        if (global) {
                data = MacroTable::globalMacros().get(name);
                if (data != 0)
                        return data;
        }

        return 0;
}


MacroData const * Buffer::getMacro(docstring const & name, bool global) const
{
        // set scope end behind the last paragraph
        DocIterator scope = par_iterator_begin();
        scope.pit() = scope.lastpit() + 1;

        return getMacro(name, scope, global);
}


MacroData const * Buffer::getMacro(docstring const & name,
        Buffer const & child, bool global) const
{
        // look where the child buffer is included first
        Impl::BufferPositionMap::iterator it = d->children_positions.find(&child);
        if (it == d->children_positions.end())
                return 0;

        // check for macros at the inclusion position
        return getMacro(name, it->second, global);
}


void Buffer::updateMacros(DocIterator & it, DocIterator & scope) const
{
        pit_type lastpit = it.lastpit();

        // look for macros in each paragraph
        while (it.pit() <= lastpit) {
                Paragraph & par = it.paragraph();

                // 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;

                        // is it a nested text inset?
                        if (iit->inset->asInsetText()) {
                                // Inset needs its own scope?
                                InsetText const * itext = iit->inset->asInsetText();
                                bool newScope = itext->isMacroScope();

                                // scope which ends just behind the inset
                                DocIterator insetScope = it;
                                ++insetScope.pos();

                                // collect macros in inset
                                it.push_back(CursorSlice(*iit->inset));
                                updateMacros(it, newScope ? insetScope : scope);
                                it.pop_back();
                                continue;
                        }

                        // is it an external file?
                        if (iit->inset->lyxCode() == INCLUDE_CODE) {
                                // get buffer of external file
                                InsetInclude const & inset =
                                        static_cast<InsetInclude const &>(*iit->inset);
                                d->macro_lock = true;
                                Buffer * child = inset.getChildBuffer();
                                d->macro_lock = false;
                                if (!child)
                                        continue;

                                // register its position, but only when it is
                                // included first in the buffer
                                if (d->children_positions.find(child) ==
                                        d->children_positions.end())
                                                d->children_positions[child] = it;

                                // register child with its scope
                                d->position_to_children[it] = Impl::ScopeBuffer(scope, child);
                                continue;
                        }

                        if (iit->inset->lyxCode() != MATHMACRO_CODE)
                                continue;

                        // get macro data
                        MathMacroTemplate & macroTemplate =
                                static_cast<MathMacroTemplate &>(*iit->inset);
                        MacroContext mc(this, it);
                        macroTemplate.updateToContext(mc);

                        // valid?
                        bool valid = macroTemplate.validMacro();
                        // FIXME: Should be fixNameAndCheckIfValid() in fact,
                        // then the BufferView's cursor will be invalid in
                        // some cases which leads to crashes.
                        if (!valid)
                                continue;

                        // register macro
                        // FIXME (Abdel), I don't understandt why we pass 'it' here
                        // instead of 'macroTemplate' defined above... is this correct?
                        d->macros[macroTemplate.name()][it] =
                                Impl::ScopeMacro(scope, MacroData(const_cast<Buffer *>(this), it));
                }

                // next paragraph
                it.pit()++;
                it.pos() = 0;
        }
}


void Buffer::updateMacros() const
{
        if (d->macro_lock)
                return;

        LYXERR(Debug::MACROS, "updateMacro of " << d->filename.onlyFileName());

        // start with empty table
        d->macros.clear();
        d->children_positions.clear();
        d->position_to_children.clear();

        // Iterate over buffer, starting with first paragraph
        // The scope must be bigger than any lookup DocIterator
        // later. For the global lookup, lastpit+1 is used, hence
        // we use lastpit+2 here.
        DocIterator it = par_iterator_begin();
        DocIterator outerScope = it;
        outerScope.pit() = outerScope.lastpit() + 2;
        updateMacros(it, outerScope);
}


void Buffer::getUsedBranches(std::list<docstring> & result, bool const from_master) const
{
        InsetIterator it  = inset_iterator_begin(inset());
        InsetIterator const end = inset_iterator_end(inset());
        for (; it != end; ++it) {
                if (it->lyxCode() == BRANCH_CODE) {
                        InsetBranch & br = static_cast<InsetBranch &>(*it);
                        docstring const name = br.branch();
                        if (!from_master && !params().branchlist().find(name))
                                result.push_back(name);
                        else if (from_master && !masterBuffer()->params().branchlist().find(name))
                                result.push_back(name);
                        continue;
                }
                if (it->lyxCode() == INCLUDE_CODE) {
                        // get buffer of external file
                        InsetInclude const & ins =
                                static_cast<InsetInclude const &>(*it);
                        Buffer * child = ins.getChildBuffer();
                        if (!child)
                                continue;
                        child->getUsedBranches(result, true);
                }
        }
        // remove duplicates
        result.unique();
}


void Buffer::updateMacroInstances() const
{
        LYXERR(Debug::MACROS, "updateMacroInstances for "
                << d->filename.onlyFileName());
        DocIterator it = doc_iterator_begin(this);
        DocIterator end = doc_iterator_end(this);
        for (; it != end; it.forwardPos()) {
                // look for MathData cells in InsetMathNest insets
                Inset * inset = it.nextInset();
                if (!inset)
                        continue;

                InsetMath * minset = inset->asInsetMath();
                if (!minset)
                        continue;

                // update macro in all cells of the InsetMathNest
                DocIterator::idx_type n = minset->nargs();
                MacroContext mc = MacroContext(this, it);
                for (DocIterator::idx_type i = 0; i < n; ++i) {
                        MathData & data = minset->cell(i);
                        data.updateMacros(0, mc);
                }
        }
}


void Buffer::listMacroNames(MacroNameSet & macros) const
{
        if (d->macro_lock)
                return;

        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);

        // 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);

        // call parent
        Buffer const * const pbuf = d->parent();
        if (pbuf)
                pbuf->listMacroNames(macros);

        d->macro_lock = false;
}


void Buffer::listParentMacros(MacroSet & macros, LaTeXFeatures & features) const
{
        Buffer const * const pbuf = d->parent();
        if (!pbuf)
                return;

        MacroNameSet names;
        pbuf->listMacroNames(names);

        // resolve macros
        MacroNameSet::iterator it = names.begin();
        MacroNameSet::iterator end = names.end();
        for (; it != end; ++it) {
                // defined?
                MacroData const * data =
                pbuf->getMacro(*it, *this, false);
                if (data) {
                        macros.insert(data);

                        // we cannot access the original MathMacroTemplate anymore
                        // here to calls validate method. So we do its work here manually.
                        // FIXME: somehow make the template accessible here.
                        if (data->optionals() > 0)
                                features.require("xargs");
                }
        }
}


Buffer::References & Buffer::references(docstring const & label)
{
        if (d->parent())
                return const_cast<Buffer *>(masterBuffer())->references(label);

        RefCache::iterator it = d->ref_cache_.find(label);
        if (it != d->ref_cache_.end())
                return it->second.second;

        static InsetLabel const * dummy_il = 0;
        static References const dummy_refs;
        it = d->ref_cache_.insert(
                make_pair(label, make_pair(dummy_il, dummy_refs))).first;
        return it->second.second;
}


Buffer::References const & Buffer::references(docstring const & label) const
{
        return const_cast<Buffer *>(this)->references(label);
}


void Buffer::setInsetLabel(docstring const & label, InsetLabel const * il)
{
        masterBuffer()->d->ref_cache_[label].first = il;
}


InsetLabel const * Buffer::insetLabel(docstring const & label) const
{
        return masterBuffer()->d->ref_cache_[label].first;
}


void Buffer::clearReferenceCache() const
{
        if (!d->parent())
                d->ref_cache_.clear();
}


void Buffer::changeRefsIfUnique(docstring const & from, docstring const & to,
        InsetCode code)
{
        //FIXME: This does not work for child documents yet.
        LASSERT(code == CITE_CODE, /**/);
        // Check if the label 'from' appears more than once
        vector<docstring> labels;
        string paramName;
        BiblioInfo const & keys = masterBibInfo();
        BiblioInfo::const_iterator bit  = keys.begin();
        BiblioInfo::const_iterator bend = keys.end();

        for (; bit != bend; ++bit)
                // FIXME UNICODE
                labels.push_back(bit->first);
        paramName = "key";

        if (count(labels.begin(), labels.end(), from) > 1)
                return;

        for (InsetIterator it = inset_iterator_begin(inset()); it; ++it) {
                if (it->lyxCode() == code) {
                        InsetCommand & inset = static_cast<InsetCommand &>(*it);
                        docstring const oldValue = inset.getParam(paramName);
                        if (oldValue == from)
                                inset.setParam(paramName, to);
                }
        }
}


void Buffer::getSourceCode(odocstream & os, pit_type par_begin,
        pit_type par_end, bool full_source) const
{
        OutputParams runparams(&params().encoding());
        runparams.nice = true;
        runparams.flavor = params().useXetex ? 
                OutputParams::XETEX : OutputParams::LATEX;
        runparams.linelen = lyxrc.plaintext_linelen;
        // No side effect of file copying and image conversion
        runparams.dryrun = true;

        if (full_source) {
                os << "% " << _("Preview source code") << "\n\n";
                d->texrow.reset();
                d->texrow.newline();
                d->texrow.newline();
                if (isDocBook())
                        writeDocBookSource(os, absFileName(), runparams, false);
                else
                        // latex or literate
                        writeLaTeXSource(os, string(), runparams, true, true);
        } else {
                runparams.par_begin = par_begin;
                runparams.par_end = par_end;
                if (par_begin + 1 == par_end) {
                        os << "% "
                           << bformat(_("Preview source code for paragraph %1$d"), par_begin)
                           << "\n\n";
                } else {
                        os << "% "
                           << bformat(_("Preview source code from paragraph %1$s to %2$s"),
                                        convert<docstring>(par_begin),
                                        convert<docstring>(par_end - 1))
                           << "\n\n";
                }
                TexRow texrow;
                texrow.reset();
                texrow.newline();
                texrow.newline();
                // output paragraphs
                if (isDocBook())
                        docbookParagraphs(text(), *this, os, runparams);
                else 
                        // latex or literate
                        latexParagraphs(*this, text(), os, texrow, runparams);
        }
}


ErrorList & Buffer::errorList(string const & type) const
{
        static ErrorList emptyErrorList;
        map<string, ErrorList>::iterator I = d->errorLists.find(type);
        if (I == d->errorLists.end())
                return emptyErrorList;

        return I->second;
}


void Buffer::updateTocItem(std::string const & type,
        DocIterator const & dit) const
{
        if (gui_)
                gui_->updateTocItem(type, dit);
}


void Buffer::structureChanged() const
{
        if (gui_)
                gui_->structureChanged();
}


void Buffer::errors(string const & err, bool from_master) const
{
        if (gui_)
                gui_->errors(err, from_master);
}


void Buffer::message(docstring const & msg) const
{
        if (gui_)
                gui_->message(msg);
}


void Buffer::setBusy(bool on) const
{
        if (gui_)
                gui_->setBusy(on);
}


void Buffer::setReadOnly(bool on) const
{
        if (d->wa_)
                d->wa_->setReadOnly(on);
}


void Buffer::updateTitles() const
{
        if (d->wa_)
                d->wa_->updateTitles();
}


void Buffer::resetAutosaveTimers() const
{
        if (gui_)
                gui_->resetAutosaveTimers();
}


bool Buffer::hasGuiDelegate() const
{
        return gui_;
}


void Buffer::setGuiDelegate(frontend::GuiBufferDelegate * gui)
{
        gui_ = gui;
}



namespace {

class AutoSaveBuffer : public ForkedProcess {
public:
        ///
        AutoSaveBuffer(Buffer const & buffer, FileName const & fname)
                : buffer_(buffer), fname_(fname) {}
        ///
        virtual boost::shared_ptr<ForkedProcess> clone() const
        {
                return boost::shared_ptr<ForkedProcess>(new AutoSaveBuffer(*this));
        }
        ///
        int start()
        {
                command_ = to_utf8(bformat(_("Auto-saving %1$s"),
                                                 from_utf8(fname_.absFilename())));
                return run(DontWait);
        }
private:
        ///
        virtual int generateChild();
        ///
        Buffer const & buffer_;
        FileName fname_;
};


int AutoSaveBuffer::generateChild()
{
        // tmp_ret will be located (usually) in /tmp
        // will that be a problem?
        // Note that this calls ForkedCalls::fork(), so it's
        // ok cross-platform.
        pid_t const pid = fork();
        // If you want to debug the autosave
        // you should set pid to -1, and comment out the fork.
        if (pid != 0 && pid != -1)
                return pid;

        // pid = -1 signifies that lyx was unable
        // to fork. But we will do the save
        // anyway.
        bool failed = false;
        FileName const tmp_ret = FileName::tempName("lyxauto");
        if (!tmp_ret.empty()) {
                buffer_.writeFile(tmp_ret);
                // assume successful write of tmp_ret
                if (!tmp_ret.moveTo(fname_))
                        failed = true;
        } else
                failed = true;

        if (failed) {
                // failed to write/rename tmp_ret so try writing direct
                if (!buffer_.writeFile(fname_)) {
                        // It is dangerous to do this in the child,
                        // but safe in the parent, so...
                        if (pid == -1) // emit message signal.
                                buffer_.message(_("Autosave failed!"));
                }
        }

        if (pid == 0) // we are the child so...
                _exit(0);

        return pid;
}

} // namespace anon


FileName Buffer::getAutosaveFilename() const
{
        // if the document is unnamed try to save in the backup dir, else
        // in the default document path, and as a last try in the filePath, 
        // which will most often be the temporary directory
        string fpath;
        if (isUnnamed())
                fpath = lyxrc.backupdir_path.empty() ? lyxrc.document_path
                        : lyxrc.backupdir_path;
        if (!isUnnamed() || fpath.empty() || !FileName(fpath).exists())
                fpath = filePath();

        string const fname = "#" + d->filename.onlyFileName() + "#";
        return makeAbsPath(fname, fpath);
}


void Buffer::removeAutosaveFile() const
{
        FileName const f = getAutosaveFilename();
        if (f.exists())
                f.removeFile();
}


void Buffer::moveAutosaveFile(support::FileName const & oldauto) const
{
        FileName const newauto = getAutosaveFilename();
        if (!(oldauto == newauto || oldauto.moveTo(newauto)))
                LYXERR0("Unable to remove autosave file `" << oldauto << "'!");
}


// Perfect target for a thread...
void Buffer::autoSave() const
{
        if (isBakClean() || isReadonly()) {
                // We don't save now, but we'll try again later
                resetAutosaveTimers();
                return;
        }

        // emit message signal.
        message(_("Autosaving current document..."));
        AutoSaveBuffer autosave(*this, getAutosaveFilename());
        autosave.start();

        markBakClean();
        resetAutosaveTimers();
}


string Buffer::bufferFormat() const
{
        string format = params().documentClass().outputFormat();
        if (format == "latex") {
                if (params().useXetex)
                        return "xetex";
                if (params().encoding().package() == Encoding::japanese)
                        return "platex";
        }
        return format;
}


string Buffer::getDefaultOutputFormat() const
{
        if (!params().defaultOutputFormat.empty()
            && params().defaultOutputFormat != "default")
                return params().defaultOutputFormat;
        typedef vector<Format const *> Formats;
        Formats formats = exportableFormats(true);
        if (isDocBook()
            || isLiterate()
            || params().useXetex
            || params().encoding().package() == Encoding::japanese) {
                if (formats.empty())
                        return string();
                // return the first we find
                return formats.front()->name();
        }
        return lyxrc.default_view_format;
}



bool Buffer::doExport(string const & format, bool put_in_tempdir,
        string & result_file) const
{
        string backend_format;
        OutputParams runparams(&params().encoding());
        runparams.flavor = OutputParams::LATEX;
        runparams.linelen = lyxrc.plaintext_linelen;
        vector<string> backs = backends();
        if (find(backs.begin(), backs.end(), format) == backs.end()) {
                // Get shortest path to format
                Graph::EdgePath path;
                for (vector<string>::const_iterator it = backs.begin();
                     it != backs.end(); ++it) {
                        Graph::EdgePath p = theConverters().getPath(*it, format);
                        if (!p.empty() && (path.empty() || p.size() < path.size())) {
                                backend_format = *it;
                                path = p;
                        }
                }
                if (!path.empty())
                        runparams.flavor = theConverters().getFlavor(path);
                else {
                        Alert::error(_("Couldn't export file"),
                                bformat(_("No information for exporting the format %1$s."),
                                   formats.prettyName(format)));
                        return false;
                }
        } else {
                backend_format = format;
                // FIXME: Don't hardcode format names here, but use a flag
                if (backend_format == "pdflatex")
                        runparams.flavor = OutputParams::PDFLATEX;
        }

        string filename = latexName(false);
        filename = addName(temppath(), filename);
        filename = changeExtension(filename,
                                   formats.extension(backend_format));

        // fix macros
        updateMacroInstances();

        // Plain text backend
        if (backend_format == "text")
                writePlaintextFile(*this, FileName(filename), runparams);
        // HTML backend
        else if (backend_format == "xhtml") {
                runparams.flavor = OutputParams::HTML;
                makeLyXHTMLFile(FileName(filename), runparams);
        }       else if (backend_format == "lyx")
                writeFile(FileName(filename));
        // Docbook backend
        else if (isDocBook()) {
                runparams.nice = !put_in_tempdir;
                makeDocBookFile(FileName(filename), runparams);
        }
        // LaTeX backend
        else if (backend_format == format) {
                runparams.nice = true;
                if (!makeLaTeXFile(FileName(filename), string(), runparams))
                        return false;
        } else if (!lyxrc.tex_allows_spaces
                   && contains(filePath(), ' ')) {
                Alert::error(_("File name error"),
                           _("The directory path to the document cannot contain spaces."));
                return false;
        } else {
                runparams.nice = false;
                if (!makeLaTeXFile(FileName(filename), filePath(), runparams))
                        return false;
        }

        string const error_type = (format == "program")
                ? "Build" : bufferFormat();
        ErrorList & error_list = d->errorLists[error_type];
        string const ext = formats.extension(format);
        FileName const tmp_result_file(changeExtension(filename, ext));
        bool const success = theConverters().convert(this, FileName(filename),
                tmp_result_file, FileName(absFileName()), backend_format, format,
                error_list);
        // Emit the signal to show the error list.
        if (format != backend_format) {
                errors(error_type);
                // also to the children, in case of master-buffer-view
                std::vector<Buffer *> clist = getChildren();
                for (vector<Buffer *>::const_iterator cit = clist.begin();
                     cit != clist.end(); ++cit)
                        (*cit)->errors(error_type, true);
        }
        if (!success)
                return false;

        if (put_in_tempdir) {
                result_file = tmp_result_file.absFilename();
                return true;
        }

        result_file = changeExtension(exportFileName().absFilename(), ext);
        // We need to copy referenced files (e. g. included graphics
        // if format == "dvi") to the result dir.
        vector<ExportedFile> const files =
                runparams.exportdata->externalFiles(format);
        string const dest = onlyPath(result_file);
        CopyStatus status = SUCCESS;
        for (vector<ExportedFile>::const_iterator it = files.begin();
                it != files.end() && status != CANCEL; ++it) {
                string const fmt = formats.getFormatFromFile(it->sourceName);
                status = copyFile(fmt, it->sourceName,
                        makeAbsPath(it->exportName, dest),
                        it->exportName, status == FORCE);
        }
        if (status == CANCEL) {
                message(_("Document export cancelled."));
        } else if (tmp_result_file.exists()) {
                // Finally copy the main file
                status = copyFile(format, tmp_result_file,
                        FileName(result_file), result_file,
                        status == FORCE);
                message(bformat(_("Document exported as %1$s "
                        "to file `%2$s'"),
                        formats.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)));
        }

        return true;
}


bool Buffer::doExport(string const & format, bool put_in_tempdir) const
{
        string result_file;
        return doExport(format, put_in_tempdir, result_file);
}


bool Buffer::preview(string const & format) const
{
        string result_file;
        if (!doExport(format, true, result_file))
                return false;
        return formats.view(*this, FileName(result_file), format);
}


bool Buffer::isExportable(string const & format) const
{
        vector<string> backs = backends();
        for (vector<string>::const_iterator it = backs.begin();
             it != backs.end(); ++it)
                if (theConverters().isReachable(*it, format))
                        return true;
        return false;
}


vector<Format const *> Buffer::exportableFormats(bool only_viewable) const
{
        vector<string> const backs = backends();
        vector<Format const *> result =
                theConverters().getReachable(backs[0], only_viewable, true);
        for (vector<string>::const_iterator it = backs.begin() + 1;
             it != backs.end(); ++it) {
                vector<Format const *>  r =
                        theConverters().getReachable(*it, only_viewable, false);
                result.insert(result.end(), r.begin(), r.end());
        }
        return result;
}


vector<string> Buffer::backends() const
{
        vector<string> v;
        if (params().baseClass()->isTeXClassAvailable()) {
                v.push_back(bufferFormat());
                // FIXME: Don't hardcode format names here, but use a flag
                if (v.back() == "latex")
                        v.push_back("pdflatex");
        }
        v.push_back("text");
        v.push_back("xhtml");
        v.push_back("lyx");
        return v;
}


bool Buffer::readFileHelper(FileName const & s)
{
        // File information about normal file
        if (!s.exists()) {
                docstring const file = makeDisplayPath(s.absFilename(), 50);
                docstring text = bformat(_("The specified document\n%1$s"
                                                     "\ncould not be read."), file);
                Alert::error(_("Could not read document"), text);
                return false;
        }

        // Check if emergency save file exists and is newer.
        FileName const e(s.absFilename() + ".emergency");

        if (e.exists() && s.exists() && e.lastModified() > s.lastModified()) {
                docstring const file = makeDisplayPath(s.absFilename(), 20);
                docstring const text =
                        bformat(_("An emergency save of the document "
                                  "%1$s exists.\n\n"
                                               "Recover emergency save?"), file);
                switch (Alert::prompt(_("Load emergency save?"), text, 0, 2,
                                      _("&Recover"),  _("&Load Original"),
                                      _("&Cancel")))
                {
                case 0: {
                        // the file is not saved if we load the emergency file.
                        markDirty();
                        docstring str;
                        bool res;

                        if ((res = readFile(e)) == success)
                                str = _("Document was successfully recovered.");
                        else
                                str = _("Document was NOT successfully recovered.");
                        str += "\n\n" + bformat(_("Remove emergency file now?\n(%1$s)"),
                                                from_utf8(e.absFilename()));

                        if (!Alert::prompt(_("Delete emergency file?"), str, 1, 1,
                                        _("&Remove"), _("&Keep it"))) {
                                e.removeFile();
                                if (res == success)
                                        Alert::warning(_("Emergency file deleted"),
                                                _("Do not forget to save your file now!"), true);
                                }
                        return res;
                }
                case 1:
                        if (!Alert::prompt(_("Delete emergency file?"),
                                        _("Remove emergency file now?"), 1, 1,
                                        _("&Remove"), _("&Keep it")))
                                e.removeFile();
                        break;
                default:
                        return false;
                }
        }

        // Now check if autosave file is newer.
        FileName const a(onlyPath(s.absFilename()) + '#' + onlyFilename(s.absFilename()) + '#');

        if (a.exists() && s.exists() && a.lastModified() > s.lastModified()) {
                docstring const file = makeDisplayPath(s.absFilename(), 20);
                docstring const text =
                        bformat(_("The backup of the document "
                                  "%1$s is newer.\n\nLoad the "
                                               "backup instead?"), file);
                switch (Alert::prompt(_("Load backup?"), text, 0, 2,
                                      _("&Load backup"), _("Load &original"),
                                      _("&Cancel") ))
                {
                case 0:
                        // the file is not saved if we load the autosave file.
                        markDirty();
                        return readFile(a);
                case 1:
                        // Here we delete the autosave
                        a.removeFile();
                        break;
                default:
                        return false;
                }
        }
        return readFile(s);
}


bool Buffer::loadLyXFile(FileName const & s)
{
        if (s.isReadableFile()) {
                if (readFileHelper(s)) {
                        lyxvc().file_found_hook(s);
                        if (!s.isWritable())
                                setReadonly(true);
                        return true;
                }
        } else {
                docstring const file = makeDisplayPath(s.absFilename(), 20);
                // Here we probably should run
                if (LyXVC::file_not_found_hook(s)) {
                        docstring const text =
                                bformat(_("Do you want to retrieve the document"
                                                       " %1$s from version control?"), file);
                        int const ret = Alert::prompt(_("Retrieve from version control?"),
                                text, 0, 1, _("&Retrieve"), _("&Cancel"));

                        if (ret == 0) {
                                // How can we know _how_ to do the checkout?
                                // With the current VC support it has to be,
                                // a RCS file since CVS do not have special ,v files.
                                RCS::retrieve(s);
                                return loadLyXFile(s);
                        }
                }
        }
        return false;
}


void Buffer::bufferErrors(TeXErrors const & terr, ErrorList & errorList) const
{
        TeXErrors::Errors::const_iterator cit = terr.begin();
        TeXErrors::Errors::const_iterator end = terr.end();

        for (; cit != end; ++cit) {
                int id_start = -1;
                int pos_start = -1;
                int errorRow = cit->error_in_line;
                bool found = d->texrow.getIdFromRow(errorRow, id_start,
                                                       pos_start);
                int id_end = -1;
                int pos_end = -1;
                do {
                        ++errorRow;
                        found = d->texrow.getIdFromRow(errorRow, id_end, pos_end);
                } while (found && id_start == id_end && pos_start == pos_end);

                errorList.push_back(ErrorItem(cit->error_desc,
                        cit->error_text, id_start, pos_start, pos_end));
        }
}


void Buffer::setBuffersForInsets() const
{
        inset().setBuffer(const_cast<Buffer &>(*this)); 
}


void Buffer::updateLabels(UpdateScope scope) const
{
        // Use the master text class also for child documents
        Buffer const * const master = masterBuffer();
        DocumentClass const & textclass = master->params().documentClass();

        // keep the buffers to be children in this set. If the call from the
        // master comes back we can see which of them were actually seen (i.e.
        // via an InsetInclude). The remaining ones in the set need still be updated.
        static std::set<Buffer const *> bufToUpdate;
        if (scope == UpdateMaster) {
                // If this is a child document start with the master
                if (master != this) {
                        bufToUpdate.insert(this);
                        master->updateLabels();
                        // Do this here in case the master has no gui associated with it. Then, 
                        // the TocModel is not updated and TocModel::toc_ is invalid (bug 5699).
                        if (!master->gui_)
                                structureChanged();

                        // was buf referenced from the master (i.e. not in bufToUpdate anymore)?
                        if (bufToUpdate.find(this) == bufToUpdate.end())
                                return;
                }

                // start over the counters in the master
                textclass.counters().reset();
        }

        // update will be done below for this buffer
        bufToUpdate.erase(this);

        // update all caches
        clearReferenceCache();
        updateMacros();

        Buffer & cbuf = const_cast<Buffer &>(*this);

        LASSERT(!text().paragraphs().empty(), /**/);

        // do the real work
        ParIterator parit = cbuf.par_iterator_begin();
        updateLabels(parit);

        if (master != this)
                // TocBackend update will be done later.
                return;

        cbuf.tocBackend().update();
        if (scope == UpdateMaster)
                cbuf.structureChanged();
}


static depth_type getDepth(DocIterator const & it)
{
        depth_type depth = 0;
        for (size_t i = 0 ; i < it.depth() ; ++i)
                if (!it[i].inset().inMathed())
                        depth += it[i].paragraph().getDepth() + 1;
        // remove 1 since the outer inset does not count
        return depth - 1;
}

static depth_type getItemDepth(ParIterator const & it)
{
        Paragraph const & par = *it;
        LabelType const labeltype = par.layout().labeltype;

        if (labeltype != LABEL_ENUMERATE && labeltype != LABEL_ITEMIZE)
                return 0;

        // this will hold the lowest depth encountered up to now.
        depth_type min_depth = getDepth(it);
        ParIterator prev_it = it;
        while (true) {
                if (prev_it.pit())
                        --prev_it.top().pit();
                else {
                        // start of nested inset: go to outer par
                        prev_it.pop_back();
                        if (prev_it.empty()) {
                                // start of document: nothing to do
                                return 0;
                        }
                }

                // We search for the first paragraph with same label
                // that is not more deeply nested.
                Paragraph & prev_par = *prev_it;
                depth_type const prev_depth = getDepth(prev_it);
                if (labeltype == prev_par.layout().labeltype) {
                        if (prev_depth < min_depth)
                                return prev_par.itemdepth + 1;
                        if (prev_depth == min_depth)
                                return prev_par.itemdepth;
                }
                min_depth = min(min_depth, prev_depth);
                // small optimization: if we are at depth 0, we won't
                // find anything else
                if (prev_depth == 0)
                        return 0;
        }
}


static bool needEnumCounterReset(ParIterator const & it)
{
        Paragraph const & par = *it;
        LASSERT(par.layout().labeltype == LABEL_ENUMERATE, /**/);
        depth_type const cur_depth = par.getDepth();
        ParIterator prev_it = it;
        while (prev_it.pit()) {
                --prev_it.top().pit();
                Paragraph const & prev_par = *prev_it;
                if (prev_par.getDepth() <= cur_depth)
                        return  prev_par.layout().labeltype != LABEL_ENUMERATE;
        }
        // start of nested inset: reset
        return true;
}


// set the label of a paragraph. This includes the counters.
static void setLabel(Buffer const & buf, ParIterator & it)
{
        BufferParams const & bp = buf.masterBuffer()->params();
        DocumentClass const & textclass = bp.documentClass();
        Paragraph & par = it.paragraph();
        Layout const & layout = par.layout();
        Counters & counters = textclass.counters();

        if (par.params().startOfAppendix()) {
                // FIXME: only the counter corresponding to toplevel
                // sectionning should be reset
                counters.reset();
                counters.appendix(true);
        }
        par.params().appendix(counters.appendix());

        // Compute the item depth of the paragraph
        par.itemdepth = getItemDepth(it);

        if (layout.margintype == MARGIN_MANUAL
            || layout.latextype == LATEX_BIB_ENVIRONMENT) {
                if (par.params().labelWidthString().empty())
                        par.params().labelWidthString(par.expandLabel(layout, bp));
        } else {
                par.params().labelWidthString(docstring());
        }

        switch(layout.labeltype) {
        case LABEL_COUNTER:
                if (layout.toclevel <= bp.secnumdepth
                    && (layout.latextype != LATEX_ENVIRONMENT
                        || it.text()->isFirstInSequence(it.pit()))) {
                        counters.step(layout.counter);
                        par.params().labelString(
                                par.expandLabel(layout, bp));
                } else
                        par.params().labelString(docstring());
                break;

        case LABEL_ITEMIZE: {
                // At some point of time we should do something more
                // clever here, like:
                //   par.params().labelString(
                //    bp.user_defined_bullet(par.itemdepth).getText());
                // for now, use a simple hardcoded label
                docstring itemlabel;
                switch (par.itemdepth) {
                case 0:
                        itemlabel = char_type(0x2022);
                        break;
                case 1:
                        itemlabel = char_type(0x2013);
                        break;
                case 2:
                        itemlabel = char_type(0x2217);
                        break;
                case 3:
                        itemlabel = char_type(0x2219); // or 0x00b7
                        break;
                }
                par.params().labelString(itemlabel);
                break;
        }

        case LABEL_ENUMERATE: {
                docstring enumcounter = layout.counter.empty() ? from_ascii("enum") : layout.counter;

                switch (par.itemdepth) {
                case 2:
                        enumcounter += 'i';
                case 1:
                        enumcounter += 'i';
                case 0:
                        enumcounter += 'i';
                        break;
                case 3:
                        enumcounter += "iv";
                        break;
                default:
                        // not a valid enumdepth...
                        break;
                }

                // Maybe we have to reset the enumeration counter.
                if (needEnumCounterReset(it))
                        counters.reset(enumcounter);
                counters.step(enumcounter);

                string const & lang = par.getParLanguage(bp)->code();
                par.params().labelString(counters.theCounter(enumcounter, lang));

                break;
        }

        case LABEL_SENSITIVE: {
                string const & type = counters.current_float();
                docstring full_label;
                if (type.empty())
                        full_label = buf.B_("Senseless!!! ");
                else {
                        docstring name = buf.B_(textclass.floats().getType(type).name());
                        if (counters.hasCounter(from_utf8(type))) {
                                string const & lang = par.getParLanguage(bp)->code();
                                counters.step(from_utf8(type));
                                full_label = bformat(from_ascii("%1$s %2$s:"), 
                                                     name, 
                                                     counters.theCounter(from_utf8(type), lang));
                        } else
                                full_label = bformat(from_ascii("%1$s #:"), name);      
                }
                par.params().labelString(full_label);   
                break;
        }

        case LABEL_NO_LABEL:
                par.params().labelString(docstring());
                break;

        case LABEL_MANUAL:
        case LABEL_TOP_ENVIRONMENT:
        case LABEL_CENTERED_TOP_ENVIRONMENT:
        case LABEL_STATIC:      
        case LABEL_BIBLIO:
                par.params().labelString(par.expandLabel(layout, bp));
                break;
        }
}


void Buffer::updateLabels(ParIterator & parit) const
{
        LASSERT(parit.pit() == 0, /**/);

        // set the position of the text in the buffer to be able
        // to resolve macros in it. This has nothing to do with
        // labels, but by putting it here we avoid implementing
        // a whole bunch of traversal routines just for this call.
        parit.text()->setMacrocontextPosition(parit);

        depth_type maxdepth = 0;
        pit_type const lastpit = parit.lastpit();
        for ( ; parit.pit() <= lastpit ; ++parit.pit()) {
                // reduce depth if necessary
                parit->params().depth(min(parit->params().depth(), maxdepth));
                maxdepth = parit->getMaxDepthAfter();

                // set the counter for this paragraph
                setLabel(*this, parit);

                // 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->updateLabels(parit);
                }
        }
}


int Buffer::spellCheck(DocIterator & from, DocIterator & to,
        WordLangTuple & word_lang, docstring_list & suggestions) const
{
        int progress = 0;
        WordLangTuple wl;
        suggestions.clear();
        word_lang = WordLangTuple();
        // OK, we start from here.
        DocIterator const end = doc_iterator_end(this);
        for (; from != end; from.forwardPos()) {
                // We are only interested in text so remove the math CursorSlice.
                while (from.inMathed())
                        from.forwardInset();
                to = from;
                if (from.paragraph().spellCheck(from.pos(), to.pos(), wl, suggestions)) {
                        word_lang = wl;
                        break;
                }
                from = to;
                ++progress;
        }
        return progress;
}

} // namespace lyx