src/Buffer.h

   1 // -*- C++ -*-
   2 /**
   3  * \file Buffer.h
   4  * This file is part of LyX, the document processor.
   5  * Licence details can be found in the file COPYING.
   6  *
   7  * \author Lars Gullik Bjønnes
   8  *
   9  * Full author contact details are available in file CREDITS.
  10  */
  11
  12 #ifndef BUFFER_H
  13 #define BUFFER_H
  14
  15 #include "insets/InsetCode.h"
  16
  17 #include "support/strfwd.h"
  18 #include "support/types.h"
  19 #include "support/SignalSlot.h"
  20
  21 #include <string>
  22 #include <vector>
  23
  24
  25 namespace lyx {
  26
  27 class BiblioInfo;
  28 class BufferParams;
  29 class DocIterator;
  30 class ErrorItem;
  31 class ErrorList;
  32 class FuncRequest;
  33 class Inset;
  34 class InsetRef;
  35 class InsetLabel;
  36 class Font;
  37 class Format;
  38 class Lexer;
  39 class LyXRC;
  40 class Text;
  41 class LyXVC;
  42 class LaTeXFeatures;
  43 class Language;
  44 class MacroData;
  45 class MacroNameSet;
  46 class MacroSet;
  47 class OutputParams;
  48 class Paragraph;
  49 class ParConstIterator;
  50 class ParIterator;
  51 class ParagraphList;
  52 class TeXErrors;
  53 class TexRow;
  54 class TocBackend;
  55 class Undo;
  56
  57 namespace frontend {
  58 class GuiBufferDelegate;
  59 class WorkAreaManager;
  60 }
  61
  62 namespace support {
  63 class FileName;
  64 class FileNameList;
  65 }
  66
  67 /** The buffer object.
  68  * This is the buffer object. It contains all the informations about
  69  * a document loaded into LyX.
  70  * The buffer object owns the Text (wrapped in an InsetText), which
  71  * contains the individual paragraphs of the document.
  72  *
  73  *
  74  * I am not sure if the class is complete or
  75  * minimal, probably not.
  76  * \author Lars Gullik Bjønnes
  77  */
  78 class Buffer {
  79 public:
  80         /// What type of log will \c getLogName() return?
  81         enum LogType {
  82                 latexlog, ///< LaTeX log
  83                 buildlog  ///< Literate build log
  84         };
  85
  86         /// Result of \c readFile()
  87         enum ReadStatus {
  88                 failure, ///< The file could not be read
  89                 success, ///< The file could not be read
  90                 wrongversion ///< The version of the file does not match ours
  91         };
  92
  93
  94         /// Method to check if a file is externally modified, used by
  95         /// isExternallyModified()
  96         /**
  97          * timestamp is fast but inaccurate. For example, the granularity
  98          * of timestamp on a FAT filesystem is 2 second. Also, various operations
  99          * may touch the timestamp of a file even when its content is unchanged.
 100          *
 101          * checksum is accurate but slow, which can be a problem when it is
 102          * frequently used, or used for a large file on a slow (network) file
 103          * system.
 104          *
 105          * FIXME: replace this method with support/FileMonitor.
 106          */
 107         enum CheckMethod {
 108                 checksum_method,  ///< Use file checksum
 109                 timestamp_method, ///< Use timestamp, and checksum if timestamp has changed
 110         };
 111
 112         /** Constructor
 113             \param file
 114             \param b  optional \c false by default
 115         */
 116         explicit Buffer(std::string const & file, bool b = false);
 117
 118         /// Destructor
 119         ~Buffer();
 120
 121         /** High-level interface to buffer functionality.
 122             This function parses a command string and executes it
 123         */
 124         bool dispatch(std::string const & command, bool * result = 0);
 125
 126         /// Maybe we know the function already by number...
 127         bool dispatch(FuncRequest const & func, bool * result = 0);
 128
 129         /// Load the autosaved file.
 130         void loadAutoSaveFile();
 131
 132         /// read a new document from a string
 133         bool readString(std::string const &);
 134         /// load a new file
 135         bool readFile(support::FileName const & filename);
 136
 137         /// read the header, returns number of unknown tokens
 138         int readHeader(Lexer & lex);
 139
 140         /** Reads a file without header.
 141             \param par if != 0 insert the file.
 142             \return \c false if file is not completely read.
 143         */
 144         bool readDocument(Lexer &);
 145
 146         ///
 147         void insertStringAsLines(ParagraphList & plist,
 148                 pit_type &, pos_type &,
 149                 Font const &, docstring const &, bool);
 150         ///
 151         DocIterator getParFromID(int id) const;
 152         /// do we have a paragraph with this id?
 153         bool hasParWithID(int id) const;
 154
 155         ///
 156         frontend::WorkAreaManager & workAreaManager() const;
 157
 158         /** Save file.
 159             Takes care of auto-save files and backup file if requested.
 160             Returns \c true if the save is successful, \c false otherwise.
 161         */
 162         bool save() const;
 163
 164         /// Write document to stream. Returns \c false if unsuccesful.
 165         bool write(std::ostream &) const;
 166         /// Write file. Returns \c false if unsuccesful.
 167         bool writeFile(support::FileName const &) const;
 168
 169   /// Loads LyX file \c filename into buffer, *  and \return success
 170         bool loadLyXFile(support::FileName const & s);
 171
 172         /// Fill in the ErrorList with the TeXErrors
 173         void bufferErrors(TeXErrors const &, ErrorList &) const;
 174
 175         /// Just a wrapper for writeLaTeXSource, first creating the ofstream.
 176         bool makeLaTeXFile(support::FileName const & filename,
 177                            std::string const & original_path,
 178                            OutputParams const &,
 179                            bool output_preamble = true,
 180                            bool output_body = true) const;
 181         /** Export the buffer to LaTeX.
 182             If \p os is a file stream, and params().inputenc is "auto" or
 183             "default", and the buffer contains text in different languages
 184             with more than one encoding, then this method will change the
 185             encoding associated to \p os. Therefore you must not call this
 186             method with a string stream if the output is supposed to go to a
 187             file. \code
 188             odocfstream ofs;
 189             ofs.open("test.tex");
 190             writeLaTeXSource(ofs, ...);
 191             ofs.close();
 192             \endcode is NOT equivalent to \code
 193             odocstringstream oss;
 194             writeLaTeXSource(oss, ...);
 195             odocfstream ofs;
 196             ofs.open("test.tex");
 197             ofs << oss.str();
 198             ofs.close();
 199             \endcode
 200          */
 201         void writeLaTeXSource(odocstream & os,
 202                            std::string const & original_path,
 203                            OutputParams const &,
 204                            bool output_preamble = true,
 205                            bool output_body = true) const;
 206         ///
 207         void makeDocBookFile(support::FileName const & filename,
 208                              OutputParams const & runparams_in,
 209                              bool only_body = false) const;
 210         ///
 211         void writeDocBookSource(odocstream & os, std::string const & filename,
 212                              OutputParams const & runparams_in,
 213                              bool only_body = false) const;
 214         /// returns the main language for the buffer (document)
 215         Language const * language() const;
 216         /// get l10n translated to the buffers language
 217         docstring const B_(std::string const & l10n) const;
 218
 219         ///
 220         int runChktex();
 221         /// return true if the main lyx file does not need saving
 222         bool isClean() const;
 223         ///
 224         bool isBakClean() const;
 225         ///
 226         bool isDepClean(std::string const & name) const;
 227
 228         /// whether or not disk file has been externally modified
 229         bool isExternallyModified(CheckMethod method) const;
 230
 231         /// save timestamp and checksum of the given file.
 232         void saveCheckSum(support::FileName const & file) const;
 233
 234         /// mark the main lyx file as not needing saving
 235         void markClean() const;
 236
 237         ///
 238         void markBakClean() const;
 239
 240         ///
 241         void markDepClean(std::string const & name);
 242
 243         ///
 244         void setUnnamed(bool flag = true);
 245
 246         ///
 247         bool isUnnamed() const;
 248
 249         /// Mark this buffer as dirty.
 250         void markDirty();
 251
 252         /// Returns the buffer's filename. It is always an absolute path.
 253         support::FileName fileName() const;
 254
 255         /// Returns the buffer's filename. It is always an absolute path.
 256         std::string absFileName() const;
 257
 258         /// Returns the the path where the buffer lives.
 259         /// It is always an absolute path.
 260         std::string filePath() const;
 261
 262         /** A transformed version of the file name, adequate for LaTeX.
 263             \param no_path optional if \c true then the path is stripped.
 264         */
 265         std::string latexName(bool no_path = true) const;
 266
 267         /// Get thee name and type of the log.
 268         std::string logName(LogType * type = 0) const;
 269
 270         /// Change name of buffer. Updates "read-only" flag.
 271         void setFileName(std::string const & newfile);
 272
 273         /// Set document's parent Buffer.
 274         void setParent(Buffer const *);
 275         Buffer const * parent();
 276
 277         /** Get the document's master (or \c this if this is not a
 278             child document)
 279          */
 280         Buffer const * masterBuffer() const;
 281
 282         /// \return true if \p child is a child of this \c Buffer.
 283         bool isChild(Buffer * child) const;
 284
 285         /// Is buffer read-only?
 286         bool isReadonly() const;
 287
 288         /// Set buffer read-only flag
 289         void setReadonly(bool flag = true);
 290
 291         /// returns \c true if the buffer contains a LaTeX document
 292         bool isLatex() const;
 293         /// returns \c true if the buffer contains a DocBook document
 294         bool isDocBook() const;
 295         /// returns \c true if the buffer contains a Wed document
 296         bool isLiterate() const;
 297
 298         /** Validate a buffer for LaTeX.
 299             This validates the buffer, and returns a struct for use by
 300             #makeLaTeX# and others. Its main use is to figure out what
 301             commands and packages need to be included in the LaTeX file.
 302             It (should) also check that the needed constructs are there
 303             (i.e. that the \refs points to coresponding \labels). It
 304             should perhaps inset "error" insets to help the user correct
 305             obvious mistakes.
 306         */
 307         void validate(LaTeXFeatures &) const;
 308
 309         /// Update the cache with all bibfiles in use (including bibfiles
 310         /// of loaded child documents).
 311         void updateBibfilesCache() const;
 312         ///
 313         void invalidateBibinfoCache();
 314         /// Return the cache with all bibfiles in use (including bibfiles
 315         /// of loaded child documents).
 316         support::FileNameList const & getBibfilesCache() const;
 317         /// \return the bibliography information for this buffer's master,
 318         /// or just for it, if it isn't a child.
 319         BiblioInfo const & masterBibInfo() const;
 320         /// \return the bibliography information for this buffer ONLY.
 321         BiblioInfo const & localBibInfo() const;
 322         ///
 323         void getLabelList(std::vector<docstring> &) const;
 324
 325         ///
 326         void changeLanguage(Language const * from, Language const * to);
 327
 328         ///
 329         bool isMultiLingual() const;
 330
 331         ///
 332         BufferParams & params();
 333         BufferParams const & params() const;
 334
 335         /** The list of paragraphs.
 336             This is a linked list of paragraph, this list holds the
 337             whole contents of the document.
 338          */
 339         ParagraphList & paragraphs();
 340         ParagraphList const & paragraphs() const;
 341
 342         /// LyX version control object.
 343         LyXVC & lyxvc();
 344         LyXVC const & lyxvc() const;
 345
 346         /// Where to put temporary files.
 347         std::string const temppath() const;
 348
 349         /// Used when typesetting to place errorboxes.
 350         TexRow const & texrow() const;
 351
 352         ///
 353         ParIterator par_iterator_begin();
 354         ///
 355         ParConstIterator par_iterator_begin() const;
 356         ///
 357         ParIterator par_iterator_end();
 358         ///
 359         ParConstIterator par_iterator_end() const;
 360
 361         /** \returns true only when the file is fully loaded.
 362          *  Used to prevent the premature generation of previews
 363          *  and by the citation inset.
 364          */
 365         bool isFullyLoaded() const;
 366         /// Set by buffer_funcs' newFile.
 367         void setFullyLoaded(bool);
 368
 369         /// Our main text (inside the top InsetText)
 370         Text & text() const;
 371
 372         /// Our top InsetText
 373         Inset & inset() const;
 374
 375         //
 376         // Macro handling
 377         //
 378         /// Collect macro definitions in paragraphs
 379         void updateMacros() const;
 380         /// Iterate through the whole buffer and try to resolve macros
 381         void updateMacroInstances() const;
 382
 383         /// List macro names of this buffer, the parent and the children
 384         void listMacroNames(MacroNameSet & macros) const;
 385         /// Collect macros of the parent and its children in front of this buffer.
 386         void listParentMacros(MacroSet & macros, LaTeXFeatures & features) const;
 387
 388         /// Return macro defined before pos (or in the master buffer)
 389         MacroData const * getMacro(docstring const & name, DocIterator const & pos, bool global = true) const;
 390         /// Return macro defined anywhere in the buffer (or in the master buffer)
 391         MacroData const * getMacro(docstring const & name, bool global = true) const;
 392         /// Return macro defined before the inclusion of the child
 393         MacroData const * getMacro(docstring const & name, Buffer const & child, bool global = true) const;
 394
 395         /// Replace the inset contents for insets which InsetCode is equal
 396         /// to the passed \p inset_code.
 397         void changeRefsIfUnique(docstring const & from, docstring const & to,
 398                 InsetCode code);
 399
 400         /// get source code (latex/docbook) for some paragraphs, or all paragraphs
 401         /// including preamble
 402         void getSourceCode(odocstream & os, pit_type par_begin, pit_type par_end,
 403                 bool full_source);
 404
 405         /// Access to error list.
 406         /// This method is used only for GUI visualisation of Buffer related
 407         /// errors (like parsing or LateX compilation). This method is const
 408         /// because modifying the returned ErrorList does not touch the document
 409         /// contents.
 410         ErrorList & errorList(std::string const & type) const;
 411
 412         /// The Toc backend.
 413         /// This is useful only for screen visualisation of the Buffer. This
 414         /// method is const because modifying this backend does not touch
 415         /// the document contents.
 416         TocBackend & tocBackend() const;
 417
 418         ///
 419         Undo & undo();
 420
 421         /// This function is called when the buffer is changed.
 422         void changed() const;
 423         /// This function is called when the buffer structure is changed.
 424         void structureChanged() const;
 425         /// This function is called when some parsing error shows up.
 426         void errors(std::string const & err) const;
 427         /// This function is called when the buffer busy status change.
 428         void setBusy(bool on) const;
 429         /// This function is called when the buffer readonly status change.
 430         void setReadOnly(bool on) const;
 431         /// Update window titles of all users.
 432         void updateTitles() const;
 433         /// Reset autosave timers for all users.
 434         void resetAutosaveTimers() const;
 435         ///
 436         void message(docstring const & msg) const;
 437
 438         void setGuiDelegate(frontend::GuiBufferDelegate * gui);
 439
 440         ///
 441         void autoSave() const;
 442
 443         /// return the format of the buffer on a string
 444         std::string bufferFormat() const;
 445
 446         ///
 447         bool doExport(std::string const & format, bool put_in_tempdir,
 448                 std::string & result_file) const;
 449         ///
 450         bool doExport(std::string const & format, bool put_in_tempdir) const;
 451         ///
 452         bool preview(std::string const & format) const;
 453         ///
 454         bool isExportable(std::string const & format) const;
 455         ///
 456         std::vector<Format const *> exportableFormats(bool only_viewable) const;
 457
 458         ///
 459         typedef std::vector<std::pair<InsetRef *, ParIterator> > References;
 460         References & references(docstring const & label);
 461         References const & references(docstring const & label) const;
 462         void clearReferenceCache() const;
 463         void setInsetLabel(docstring const & label, InsetLabel const * il);
 464         InsetLabel const * insetLabel(docstring const & label) const;
 465
 466 private:
 467         /// search for macro in local (buffer) table or in children
 468         MacroData const * getBufferMacro(docstring const & name,
 469                                          DocIterator const & pos) const;
 470         /** Update macro table starting with position of it
 471             \param it in some text inset
 472         */
 473         void updateMacros(DocIterator & it,
 474                                      DocIterator & scope) const;
 475
 476         ///
 477         bool readFileHelper(support::FileName const & s);
 478         ///
 479         std::vector<std::string> backends() const;
 480         /** Inserts a file into a document
 481             \return \c false if method fails.
 482         */
 483         ReadStatus readFile(Lexer &, support::FileName const & filename,
 484                             bool fromString = false);
 485
 486         /// Use the Pimpl idiom to hide the internals.
 487         class Impl;
 488         /// The pointer never changes although *pimpl_'s contents may.
 489         Impl * const d;
 490
 491         frontend::GuiBufferDelegate * gui_;
 492
 493         /// This function is called when the buffer structure is changed.
 494         Signal structureChanged_;
 495         /// This function is called when some parsing error shows up.
 496         //Signal errors(std::string const &) = 0;
 497         /// This function is called when some message shows up.
 498         //Signal message(docstring const &) = 0;
 499         /// This function is called when the buffer busy status change.
 500         //Signal setBusy(bool) = 0;
 501         /// Reset autosave timers for all users.
 502         Signal resetAutosaveTimers_;
 503 };
 504
 505
 506 } // namespace lyx
 507
 508 #endif