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