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 "FontEnums.h"
  20 #include "Layout.h"
  21
  22 #include "insets/InsetCode.h"
  23
  24 #include "support/strfwd.h"
  25 #include "support/types.h"
  26
  27 namespace lyx {
  28
  29 class AuthorList;
  30 class Buffer;
  31 class BufferParams;
  32 class Change;
  33 class Counters;
  34 class Cursor;
  35 class CursorSlice;
  36 class DocIterator;
  37 class docstring_list;
  38 class DocumentClass;
  39 class Inset;
  40 class InsetBibitem;
  41 class LaTeXFeatures;
  42 class Inset_code;
  43 class InsetList;
  44 class Language;
  45 class Font;
  46 class Font_size;
  47 class MetricsInfo;
  48 class OutputParams;
  49 class PainterInfo;
  50 class ParagraphParameters;
  51 class TexRow;
  52 class Toc;
  53 class WordLangTuple;
  54
  55 class FontSpan {
  56 public:
  57         /// Invalid font span containing no character
  58         FontSpan() : first(0), last(-1) {}
  59         /// Span including first and last
  60         FontSpan(pos_type f, pos_type l) : first(f), last(l) {}
  61
  62 public:
  63         /// Range including first and last.
  64         pos_type first, last;
  65 };
  66
  67 ///
  68 enum TextCase {
  69         ///
  70         text_lowercase = 0,
  71         ///
  72         text_capitalization = 1,
  73         ///
  74         text_uppercase = 2
  75 };
  76
  77
  78 ///
  79 enum AsStringParameter
  80 {
  81         AS_STR_NONE = 0, ///< No option, only printable characters.
  82         AS_STR_LABEL = 1, ///< Prefix with paragraph label.
  83         AS_STR_INSETS = 2, ///< Go into insets.
  84         AS_STR_NEWLINES = 4 ///< Get also newline characters.
  85 };
  86
  87
  88 /// A Paragraph holds all text, attributes and insets in a text paragraph
  89 class Paragraph
  90 {
  91 public:
  92         ///
  93         Paragraph();
  94         ///
  95         Paragraph(Paragraph const &);
  96         /// Partial copy constructor.
  97         /// Copy the Paragraph contents from \p beg to \p end (without end).
  98         Paragraph(Paragraph const & par, pos_type beg, pos_type end);
  99         ///
 100         Paragraph & operator=(Paragraph const &);
 101         ///
 102         ~Paragraph();
 103         ///
 104         int id() const;
 105
 106         ///
 107         void addChangesToToc(DocIterator const & cdit, Buffer const & buf) const;
 108         ///
 109         Language const * getParLanguage(BufferParams const &) const;
 110         ///
 111         bool isRTL(BufferParams const &) const;
 112         ///
 113         void changeLanguage(BufferParams const & bparams,
 114                             Language const * from, Language const * to);
 115         ///
 116         bool isMultiLingual(BufferParams const &) const;
 117
 118         /// Convert the paragraph to a string.
 119         /// \param AsStringParameter options. This can contain any combination of
 120         /// asStringParameter values. Valid examples:
 121         ///             asString(AS_STR_LABEL)
 122         ///             asString(AS_STR_LABEL | AS_STR_INSETS)
 123         ///             asString(AS_STR_INSETS)
 124         docstring asString(int options = AS_STR_NONE) const;
 125         ///
 126         docstring asString(pos_type beg, pos_type end,
 127                 int options = AS_STR_NONE) const;
 128
 129         /// Extract only the explicitly visible text (without any formatting),
 130         /// descending into insets
 131         docstring stringify(pos_type beg, pos_type end, int options, OutputParams & runparams) const;
 132
 133         ///
 134         void write(std::ostream &, BufferParams const &,
 135                    depth_type & depth) const;
 136         ///
 137         void validate(LaTeXFeatures &) const;
 138
 139         ///
 140         bool latex(BufferParams const &, Font const & outerfont, odocstream &,
 141                    TexRow & texrow, OutputParams const &,
 142                    int start_pos = 0, int end_pos = -1) const;
 143
 144         /// Can we drop the standard paragraph wrapper?
 145         bool emptyTag() const;
 146
 147         /// Get the id of the paragraph, usefull for docbook
 148         std::string getID(Buffer const & buf, OutputParams const & runparams) const;
 149
 150         /// Output the first word of a paragraph, return the position where it left.
 151         pos_type firstWordDocBook(odocstream & os, OutputParams const & runparams) const;
 152
 153         /// Output the first word of a paragraph, return the position where it left.
 154         pos_type firstWordLyXHTML(odocstream & os, OutputParams const & runparams) const;
 155
 156         /// Writes to stream the docbook representation
 157         void simpleDocBookOnePar(Buffer const & buf,
 158                                  odocstream &,
 159                                  OutputParams const & runparams,
 160                                  Font const & outerfont,
 161                                  pos_type initial = 0) const;
 162         /// \return any material that has had to be deferred until after the
 163         /// paragraph has closed.
 164         docstring simpleLyXHTMLOnePar(Buffer const & buf,
 165                                  odocstream &,
 166                                  OutputParams const & runparams,
 167                                  Font const & outerfont,
 168                                  pos_type initial = 0) const;
 169
 170         ///
 171         bool hasSameLayout(Paragraph const & par) const;
 172
 173         ///
 174         void makeSameLayout(Paragraph const & par);
 175
 176         ///
 177         void setInsetOwner(Inset const * inset);
 178         ///
 179         Inset const & inInset() const;
 180         ///
 181         bool allowParagraphCustomization() const;
 182         ///
 183         bool usePlainLayout() const;
 184         ///
 185         pos_type size() const;
 186         ///
 187         bool empty() const;
 188
 189         ///
 190         Layout const & layout() const;
 191         /// Do not pass a temporary to this!
 192         void setLayout(Layout const & layout);
 193         ///
 194         void setPlainOrDefaultLayout(DocumentClass const & tc);
 195         ///
 196         void setDefaultLayout(DocumentClass const & tc);
 197         ///
 198         void setPlainLayout(DocumentClass const & tc);
 199
 200         /// This is the item depth, only used by enumerate and itemize
 201         signed char itemdepth;
 202
 203         /// look up change at given pos
 204         Change const & lookupChange(pos_type pos) const;
 205
 206         /// is there a change within the given range ?
 207         bool isChanged(pos_type start, pos_type end) const;
 208         /// is there an unchanged char at the given pos ?
 209         bool isChanged(pos_type pos) const;
 210         /// is there an insertion at the given pos ?
 211         bool isInserted(pos_type pos) const;
 212         /// is there a deletion at the given pos ?
 213         bool isDeleted(pos_type pos) const;
 214         /// is the whole paragraph deleted ?
 215         bool isDeleted(pos_type start, pos_type end) const;
 216
 217         /// will the paragraph be physically merged with the next
 218         /// one if the imaginary end-of-par character is logically deleted?
 219         bool isMergedOnEndOfParDeletion(bool trackChanges) const;
 220
 221         /// set change for the entire par
 222         void setChange(Change const & change);
 223
 224         /// set change at given pos
 225         void setChange(pos_type pos, Change const & change);
 226
 227         /// accept changes within the given range
 228         void acceptChanges(pos_type start, pos_type end);
 229
 230         /// reject changes within the given range
 231         void rejectChanges(pos_type start, pos_type end);
 232
 233         /// Paragraphs can contain "manual labels", for example, Description
 234         /// environment. The text for this user-editable label is stored in
 235         /// the paragraph alongside the text of the rest of the paragraph
 236         /// (the body). This function returns the starting position of the
 237         /// body of the text in the paragraph.
 238         pos_type beginOfBody() const;
 239         /// recompute this value
 240         void setBeginOfBody();
 241
 242         ///
 243         docstring const & labelString() const;
 244
 245         /// the next two functions are for the manual labels
 246         docstring const getLabelWidthString() const;
 247         /// Set label width string.
 248         void setLabelWidthString(docstring const & s);
 249         /// Expand the counters for the labelstring of \c layout
 250         docstring expandLabel(Layout const &, BufferParams const &,
 251                 bool process_appendix = true) const;
 252         /// Actual paragraph alignment used
 253         char getAlign() const;
 254         /// The nesting depth of a paragraph
 255         depth_type getDepth() const;
 256         /// The maximal possible depth of a paragraph after this one
 257         depth_type getMaxDepthAfter() const;
 258         ///
 259         void applyLayout(Layout const & new_layout);
 260
 261         /// (logically) erase the char at pos; return true if it was actually erased
 262         bool eraseChar(pos_type pos, bool trackChanges);
 263         /// (logically) erase the given range; return the number of chars actually erased
 264         int eraseChars(pos_type start, pos_type end, bool trackChanges);
 265
 266         ///
 267         void resetFonts(Font const & font);
 268
 269         /** Get uninstantiated font setting. Returns the difference
 270             between the characters font and the layoutfont.
 271             This is what is stored in the fonttable
 272         */
 273         Font const &
 274         getFontSettings(BufferParams const &, pos_type pos) const;
 275         ///
 276         Font const & getFirstFontSettings(BufferParams const &) const;
 277
 278         /** Get fully instantiated font. If pos == -1, use the layout
 279             font attached to this paragraph.
 280             If pos == -2, use the label font of the layout attached here.
 281             In all cases, the font is instantiated, i.e. does not have any
 282             attributes with values FONT_INHERIT, FONT_IGNORE or
 283             FONT_TOGGLE.
 284         */
 285         Font const getFont(BufferParams const &, pos_type pos,
 286                               Font const & outerfont) const;
 287         Font const getLayoutFont(BufferParams const &,
 288                                     Font const & outerfont) const;
 289         Font const getLabelFont(BufferParams const &,
 290                                    Font const & outerfont) const;
 291         /**
 292          * The font returned by the above functions is the same in a
 293          * span of characters. This method will return the first and
 294          * the last positions in the paragraph for which that font is
 295          * the same. This can be used to avoid unnecessary calls to getFont.
 296          */
 297         FontSpan fontSpan(pos_type pos) const;
 298         ///
 299         char_type getChar(pos_type pos) const;
 300         /// Get the char, but mirror all bracket characters if it is right-to-left
 301         char_type getUChar(BufferParams const &, pos_type pos) const;
 302         /// pos <= size() (there is a dummy font change at the end of each par)
 303         void setFont(pos_type pos, Font const & font);
 304         /// Returns the height of the highest font in range
 305         FontSize highestFontInRange(pos_type startpos,
 306                                         pos_type endpos, FontSize def_size) const;
 307         ///
 308         void insert(pos_type pos, docstring const & str,
 309                     Font const & font, Change const & change);
 310
 311         ///
 312         void appendString(docstring const & s, Font const & font,
 313                 Change const & change);
 314         ///
 315         void appendChar(char_type c, Font const & font, Change const & change);
 316         ///
 317         void insertChar(pos_type pos, char_type c, bool trackChanges);
 318         ///
 319         void insertChar(pos_type pos, char_type c,
 320                         Font const &, bool trackChanges);
 321         ///
 322         void insertChar(pos_type pos, char_type c,
 323                         Font const &, Change const & change);
 324         /// Insert \p inset at position \p pos with \p change traking status.
 325         /// \return true if successful.
 326         bool insertInset(pos_type pos, Inset * inset,
 327                          Change const & change);
 328         /// Insert \p inset at position \p pos with \p change traking status and
 329         /// \p font.
 330         /// \return true if successful.
 331         bool insertInset(pos_type pos, Inset * inset,
 332                          Font const & font, Change const & change);
 333         ///
 334         Inset * getInset(pos_type pos);
 335         ///
 336         Inset const * getInset(pos_type pos) const;
 337
 338         /// Release inset at given position.
 339         /// \warning does not honour change tracking!
 340         /// Therefore, it should only be used for breaking and merging
 341         /// paragraphs
 342         Inset * releaseInset(pos_type pos);
 343
 344         ///
 345         InsetList const & insetList() const;
 346         ///
 347         void setBuffer(Buffer &);
 348
 349         ///
 350         bool isHfill(pos_type pos) const;
 351
 352         /// hinted by profiler
 353         bool isInset(pos_type pos) const;
 354         ///
 355         bool isNewline(pos_type pos) const;
 356         /// return true if the char is a word separator
 357         bool isSeparator(pos_type pos) const;
 358         ///
 359         bool isLineSeparator(pos_type pos) const;
 360         /// True if the character/inset at this point is a word separator.
 361         /// Note that digits in particular are not considered as word separator.
 362         bool isWordSeparator(pos_type pos) const;
 363         /// True if the element at this point is a character that is not a letter.
 364         bool isChar(pos_type pos) const;
 365         /// True if the element at this point is a space
 366         bool isSpace(pos_type pos) const;
 367
 368         /// returns true if at least one line break or line separator has been deleted
 369         /// at the beginning of the paragraph (either physically or logically)
 370         bool stripLeadingSpaces(bool trackChanges);
 371
 372         /// return true if we allow multiple spaces
 373         bool isFreeSpacing() const;
 374
 375         /// return true if we allow this par to stay empty
 376         bool allowEmpty() const;
 377         ///
 378         char_type transformChar(char_type c, pos_type pos) const;
 379         ///
 380         ParagraphParameters & params();
 381         ///
 382         ParagraphParameters const & params() const;
 383
 384         /// Check if we are in a Biblio environment and insert or
 385         /// delete InsetBibitems as necessary.
 386         /// \retval int 1, if we had to add an inset, in which case
 387         /// the cursor will need to move cursor forward; -pos, if we deleted
 388         /// an inset, in which case pos is the position from which the inset
 389         /// was deleted, and the cursor will need to be moved back one if it
 390         /// was previously past that position. Return 0 otherwise.
 391         int checkBiblio(Buffer const & buffer);
 392
 393         /// For each author, set 'used' to true if there is a change
 394         /// by this author in the paragraph.
 395         void checkAuthors(AuthorList const & authorList);
 396
 397         ///
 398         void changeCase(BufferParams const & bparams, pos_type pos,
 399                 pos_type & right, TextCase action);
 400
 401         /// find \param str string inside Paragraph.
 402         /// \return true if the specified string is at the specified position
 403         /// \param del specifies whether deleted strings in ct mode will be considered
 404         bool find(
 405                 docstring const & str, ///< string to search
 406                 bool cs, ///<
 407                 bool mw, ///<
 408                 pos_type pos, ///< start from here.
 409                 bool del = true) const;
 410
 411         void locateWord(pos_type & from, pos_type & to,
 412                 word_location const loc) const;
 413         ///
 414         void updateWords();
 415
 416         /// Spellcheck word at position \p from and fill in found misspelled word
 417         /// and \p suggestions if \p do_suggestion is true.
 418         /// \return true if pointed word is misspelled.
 419         bool spellCheck(pos_type & from, pos_type & to, WordLangTuple & wl,
 420                 docstring_list & suggestions, bool do_suggestion =  true) const;
 421
 422         /// Spellcheck word at position \p pos.
 423         /// \return true if pointed word is misspelled.
 424         bool isMisspelled(pos_type pos) const;
 425
 426 private:
 427         ///
 428         void deregisterWords();
 429         ///
 430         void collectWords();
 431         ///
 432         void registerWords();
 433
 434         /// Pimpl away stuff
 435         class Private;
 436         ///
 437         friend class Paragraph::Private;
 438         ///
 439         Private * d;
 440 };
 441
 442 } // namespace lyx
 443
 444 #endif // PARAGRAPH_H