src/paragraph.h

   1 // -*- C++ -*-
   2 /**
   3  * \file paragraph.h
   4  * This file is part of LyX, the document processor.
   5  * Licence details can be found in the file COPYING.
   6  *
   7  * \author Asger Alstrup
   8  * \author Lars Gullik Bjønnes
   9  * \author John Levon
  10  * \author André Pönitz
  11  * \author Jürgen Vigna
  12  *
  13  * Full author contact details are available in file CREDITS.
  14  */
  15
  16 #ifndef PARAGRAPH_H
  17 #define PARAGRAPH_H
  18
  19 #include "changes.h"
  20 #include "dimension.h"
  21 #include "InsetList.h"
  22 #include "lyxlayout_ptr_fwd.h"
  23 #include "RowList_fwd.h"
  24
  25 #include "insets/insetbase.h" // only for InsetBase::Code
  26
  27 #include "support/types.h"
  28
  29 #include <boost/assert.hpp>
  30
  31 #include <string>
  32 #include <utility>
  33
  34 class Buffer;
  35 class BufferParams;
  36 class BufferView;
  37 class Counters;
  38 class InsetBase;
  39 class InsetBibitem;
  40 class LaTeXFeatures;
  41 class InsetBase_code;
  42 class Language;
  43 class LyXFont;
  44 class LyXFont_size;
  45 class MetricsInfo;
  46 class OutputParams;
  47 class PainterInfo;
  48 class ParagraphParameters;
  49 class TexRow;
  50 class UpdatableInset;
  51
  52 /// A Paragraph holds all text, attributes and insets in a text paragraph
  53 class Paragraph  {
  54 public:
  55         ///
  56         enum {
  57                 /// Note that this is 1 right now to avoid
  58                 /// crashes where getChar() is called wrongly
  59                 /// (returning 0) - if this was 0, then we'd
  60                 /// try getInset() and crash. We should fix
  61                 /// all these places.
  62                 META_INSET = 1
  63         };
  64         ///
  65         typedef char value_type;
  66         ///
  67         typedef lyx::depth_type depth_type;
  68         ///
  69         typedef std::vector<value_type> TextContainer;
  70
  71         ///
  72         Paragraph();
  73         ///
  74         Paragraph(Paragraph const &);
  75         ///
  76         Paragraph & operator=(Paragraph const &);
  77         ///
  78         ~Paragraph();
  79
  80         ///
  81         int id() const;
  82
  83
  84         ///
  85         Language const * getParLanguage(BufferParams const &) const;
  86         ///
  87         bool isRightToLeftPar(BufferParams const &) const;
  88         ///
  89         void changeLanguage(BufferParams const & bparams,
  90                             Language const * from, Language const * to);
  91         ///
  92         bool isMultiLingual(BufferParams const &) const;
  93
  94         ///
  95         std::string const asString(Buffer const &,
  96                                    OutputParams const & runparams,
  97                                    bool label) const;
  98         ///
  99         std::string const asString(Buffer const &, bool label) const;
 100         ///
 101         std::string const Paragraph::asString(Buffer const & buffer,
 102                                               lyx::pos_type beg,
 103                                               lyx::pos_type end,
 104                                               bool label) const;
 105         ///
 106         std::string const asString(Buffer const &,
 107                                    OutputParams const & runparams,
 108                                    lyx::pos_type beg,
 109                                    lyx::pos_type end,
 110                                    bool label) const;
 111
 112         ///
 113         void write(Buffer const &, std::ostream &, BufferParams const &,
 114                    depth_type & depth) const;
 115         ///
 116         void validate(LaTeXFeatures &) const;
 117
 118         ///
 119         int startTeXParParams(BufferParams const &, std::ostream &, bool) const;
 120
 121         ///
 122         int endTeXParParams(BufferParams const &, std::ostream &, bool) const;
 123
 124
 125         ///
 126         bool simpleTeXOnePar(Buffer const &, BufferParams const &,
 127                              LyXFont const & outerfont, std::ostream &,
 128                              TexRow & texrow, OutputParams const &) const;
 129
 130         /// Writes to stream the content of the paragraph for linuxdoc
 131         void simpleLinuxDocOnePar(Buffer const & buf,
 132                                   std::ostream & os,
 133                                   LyXFont const & outerfont,
 134                                   OutputParams const & runparams,
 135                                   lyx::depth_type depth) const;
 136
 137         /// Can we drop the standard paragraph wrapper?
 138         bool emptyTag() const;
 139
 140         /// Get the id of the paragraph, usefull for docbook and linuxdoc
 141         std::string getID(Buffer const & buf,
 142                           OutputParams const & runparams) const;
 143
 144         // Get the first word of a paragraph, return the position where it left
 145         lyx::pos_type getFirstWord(Buffer const & buf,
 146                                    std::ostream & os,
 147                                    OutputParams const & runparams) const;
 148
 149         /// Checks if the paragraph contains only text and no inset or font change.
 150         bool onlyText(Buffer const & buf, LyXFont const & outerfont,
 151                       lyx::pos_type initial) const;
 152
 153         /// Writes to stream the docbook representation
 154         void simpleDocBookOnePar(Buffer const & buf,
 155                                  std::ostream &,
 156                                  OutputParams const & runparams,
 157                                  LyXFont const & outerfont,
 158                                  lyx::pos_type initial = 0) const;
 159
 160         ///
 161         bool hasSameLayout(Paragraph const & par) const;
 162
 163         ///
 164         void makeSameLayout(Paragraph const & par);
 165
 166         ///
 167         void setInsetOwner(UpdatableInset * inset);
 168         ///
 169         UpdatableInset * inInset() const;
 170         ///
 171         InsetBase::Code ownerCode() const;
 172         ///
 173         bool forceDefaultParagraphs() const;
 174
 175         ///
 176         lyx::pos_type size() const { return text_.size(); }
 177         ///
 178         bool empty() const { return text_.empty(); }
 179         ///
 180         void setContentsFromPar(Paragraph const & par);
 181         ///
 182         void clearContents();
 183
 184         ///
 185         LyXLayout_ptr const & layout() const;
 186         ///
 187         void layout(LyXLayout_ptr const & new_layout);
 188
 189         /// This is the item depth, only used by enumerate and itemize
 190         signed char itemdepth;
 191
 192         ///
 193         InsetBibitem * bibitem() const;  // ale970302
 194
 195         /// initialise tracking for this par
 196         void trackChanges(Change::Type = Change::UNCHANGED);
 197
 198         /// stop tracking
 199         void untrackChanges();
 200
 201         /// set entire paragraph to new text for change tracking
 202         void cleanChanges();
 203
 204         /// look up change type at given pos
 205         Change::Type lookupChange(lyx::pos_type pos) const;
 206
 207         /// look up change at given pos
 208         Change const lookupChangeFull(lyx::pos_type pos) const;
 209
 210         /// is there a change within the given range ?
 211         bool isChanged(lyx::pos_type start, lyx::pos_type end) const;
 212
 213         /// is there a non-addition in this range ?
 214         bool isChangeEdited(lyx::pos_type start, lyx::pos_type end) const;
 215
 216         /// set change at pos
 217         void setChange(lyx::pos_type pos, Change::Type type);
 218
 219         /// accept change
 220         void acceptChange(lyx::pos_type start, lyx::pos_type end);
 221
 222         /// reject change
 223         void rejectChange(lyx::pos_type start, lyx::pos_type end);
 224
 225         /// mark whole par as erased
 226         void markErased();
 227
 228         /// Paragraphs can contain "manual labels", for example, Description
 229         /// environment. The text for this user-editable label is stored in
 230         /// the paragraph alongside the text of the rest of the paragraph
 231         /// (the body). This function returns the starting position of the
 232         /// body of the text in the paragraph.
 233         lyx::pos_type beginOfBody() const;
 234         /// recompute this value
 235         void setBeginOfBody();
 236
 237         ///
 238         std::string const & getLabelstring() const;
 239
 240         /// the next two functions are for the manual labels
 241         std::string const getLabelWidthString() const;
 242         ///
 243         void setLabelWidthString(std::string const & s);
 244         ///
 245         char getAlign() const;
 246         /// The nesting depth of a paragraph
 247         depth_type getDepth() const;
 248         /// The maximal possible depth of a paragraph after this one
 249         depth_type getMaxDepthAfter() const;
 250         ///
 251         void applyLayout(LyXLayout_ptr const & new_layout);
 252
 253         /// definite erase
 254         void eraseIntern(lyx::pos_type pos);
 255         /// erase the char at the given position
 256         bool erase(lyx::pos_type pos);
 257         /// erase the given range. Returns the number of chars actually erased
 258         int erase(lyx::pos_type start, lyx::pos_type end);
 259
 260         /** Get uninstantiated font setting. Returns the difference
 261             between the characters font and the layoutfont.
 262             This is what is stored in the fonttable
 263         */
 264         LyXFont const
 265         getFontSettings(BufferParams const &, lyx::pos_type pos) const;
 266         ///
 267         LyXFont const getFirstFontSettings() const;
 268
 269         /** Get fully instantiated font. If pos == -1, use the layout
 270             font attached to this paragraph.
 271             If pos == -2, use the label font of the layout attached here.
 272             In all cases, the font is instantiated, i.e. does not have any
 273             attributes with values LyXFont::INHERIT, LyXFont::IGNORE or
 274             LyXFont::TOGGLE.
 275         */
 276         LyXFont const getFont(BufferParams const &, lyx::pos_type pos,
 277                               LyXFont const & outerfont) const;
 278         LyXFont const getLayoutFont(BufferParams const &,
 279                                     LyXFont const & outerfont) const;
 280         LyXFont const getLabelFont(BufferParams const &,
 281                                    LyXFont const & outerfont) const;
 282         /**
 283          * The font returned by the above functions is the same in a
 284          * span of characters. This method will return the first and
 285          * the last last positions in the paragraph for which that
 286          * font is the same. This can be used to avoid unnecessary
 287          * calls to getFont.
 288          */
 289         std::pair<lyx::pos_type, lyx::pos_type> getFontSpan(lyx::pos_type pos) const;
 290         ///
 291         /// this is a bottleneck.
 292         value_type getChar(lyx::pos_type pos) const
 293         {
 294                 BOOST_ASSERT(pos >= 0);
 295                 BOOST_ASSERT(pos < int(text_.size()));
 296                 return text_[pos];
 297         }
 298         /// Get the char, but mirror all bracket characters if it is right-to-left
 299         value_type getUChar(BufferParams const &, lyx::pos_type pos) const;
 300         /// The position must already exist.
 301         void setChar(lyx::pos_type pos, value_type c);
 302         /// pos <= size() (there is a dummy font change at the end of each par)
 303         void setFont(lyx::pos_type pos, LyXFont const & font);
 304         /// Returns the height of the highest font in range
 305         LyXFont_size highestFontInRange(lyx::pos_type startpos,
 306                                         lyx::pos_type endpos,
 307                                         LyXFont_size def_size) const;
 308         ///
 309         void insert(lyx::pos_type pos, std::string const & str,
 310                     LyXFont const & font);
 311         ///
 312         void insertChar(lyx::pos_type pos, value_type c,
 313                         Change change = Change(Change::INSERTED));
 314         ///
 315         void insertChar(lyx::pos_type pos, value_type c,
 316                 LyXFont const &, Change change = Change(Change::INSERTED));
 317         ///
 318         bool checkInsertChar(LyXFont &);
 319         ///
 320         void insertInset(lyx::pos_type pos, InsetBase * inset,
 321                          Change change = Change(Change::INSERTED));
 322         ///
 323         void insertInset(lyx::pos_type pos, InsetBase * inset,
 324                 LyXFont const &, Change change = Change(Change::INSERTED));
 325         ///
 326         bool insetAllowed(InsetBase_code code);
 327         ///
 328         InsetBase * getInset(lyx::pos_type pos);
 329         ///
 330         InsetBase const * getInset(lyx::pos_type pos) const;
 331         ///
 332         InsetList insetlist;
 333
 334
 335         ///
 336         bool isHfill(lyx::pos_type pos) const;
 337         /// hinted by profiler
 338         bool isInset(lyx::pos_type pos) const { return getChar(pos) == static_cast<value_type>(META_INSET); }
 339         ///
 340         bool isNewline(lyx::pos_type pos) const;
 341         ///
 342         bool isSeparator(lyx::pos_type pos) const;
 343         ///
 344         bool isLineSeparator(lyx::pos_type pos) const;
 345         /// True if the character/inset at this point can be part of a word
 346         // Note that digits in particular are considered as letters
 347         bool isLetter(lyx::pos_type pos) const;
 348
 349         /// returns -1 if inset not found
 350         int getPositionOfInset(InsetBase const * inset) const;
 351
 352         /// Returns the number of line breaks and white-space stripped at the start
 353         int stripLeadingSpaces();
 354
 355         /// return true if we allow multiple spaces
 356         bool isFreeSpacing() const;
 357
 358         /// return true if we allow this par to stay empty
 359         bool allowEmpty() const;
 360         ///
 361         unsigned char transformChar(unsigned char c, lyx::pos_type pos) const;
 362         ///
 363         ParagraphParameters & params();
 364         ///
 365         ParagraphParameters const & params() const;
 366
 367         ///
 368         Row & getRow(lyx::pos_type pos);
 369         ///
 370         Row const & getRow(lyx::pos_type pos) const;
 371         ///
 372         size_t pos2row(lyx::pos_type pos) const;
 373
 374         /// total height of paragraph
 375         unsigned int height() const { return dim_.height(); }
 376         /// total width of paragraph, may differ from workwidth
 377         unsigned int width() const { return dim_.width(); }
 378         unsigned int ascent() const { return dim_.ascent(); }
 379         unsigned int descent() const { return dim_.descent(); }
 380         /// LyXText updates the rows using this access point
 381         RowList & rows() { return rows_; }
 382         /// The painter and others use this
 383         RowList const & rows() const { return rows_; }
 384
 385         /// LyXText::redoParagraph updates this
 386         Dimension & dim() { return dim_; }
 387
 388         /// dump some information to lyxerr
 389         void dump() const;
 390 private:
 391         /// cached dimensions of paragraph
 392         Dimension dim_;
 393
 394         ///
 395         mutable RowList rows_;
 396         ///
 397         LyXLayout_ptr layout_;
 398         /**
 399          * Keeping this here instead of in the pimpl makes LyX >10% faster
 400          * for average tasks as buffer loading/switching etc.
 401          */
 402         TextContainer text_;
 403         /// end of label
 404         lyx::pos_type begin_of_body_;
 405
 406         class Pimpl;
 407         ///
 408         friend class Paragraph::Pimpl;
 409         ///
 410         Pimpl * pimpl_;
 411 };
 412
 413
 414 inline bool isInsertedText(Paragraph const & par, lyx::pos_type pos)
 415 {
 416         return par.lookupChange(pos) == Change::INSERTED;
 417 }
 418
 419
 420 inline bool isDeletedText(Paragraph const & par, lyx::pos_type pos)
 421 {
 422         return par.lookupChange(pos) == Change::DELETED;
 423 }
 424
 425 #endif // PARAGRAPH_H