src/lyxtext.h

   1 // -*- C++ -*-
   2 /* This file is part of
   3  * ======================================================
   4  *
   5  *           LyX, The Document Processor
   6  *
   7  *           Copyright 1995 Matthias Ettrich
   8  *           Copyright 1995-1999 The LyX Team.
   9  *
  10  * ======================================================*/
  11
  12 #ifndef LYXTEXT_H
  13 #define LYXTEXT_H
  14
  15 #ifdef __GNUG__
  16 #pragma interface
  17 #endif
  18
  19 #include "definitions.h"
  20 #include "layout.h"
  21 #include "lyxfont.h"
  22 #include "lyxrow.h"
  23 #include "undo.h"
  24 #include "lyxcursor.h"
  25
  26 class Buffer;
  27 class BufferParams;
  28 class LyXScreen;
  29
  30 /**
  31   This class holds the mapping between buffer paragraphs and screen rows.
  32   */
  33 class LyXText {
  34 public:
  35         ///
  36         enum text_status {
  37                 ///
  38                 UNCHANGED,
  39                 ///
  40                 NEED_LITTLE_REFRESH,
  41                 ///
  42                 NEED_MORE_REFRESH,
  43                 ///
  44                 NEED_VERY_LITTLE_REFRESH
  45         };
  46
  47         /// points to Buffer.params
  48         BufferParams *parameters;
  49         /// points to Buffer
  50         Buffer *params;
  51         ///
  52         int number_of_rows;
  53         ///
  54         long height;
  55         /// the current font settings
  56         LyXFont current_font;
  57         /// the current font
  58         LyXFont real_current_font;
  59
  60         /// Constructor
  61         LyXText(int paperwidth, Buffer *);
  62
  63         /// Destructor
  64         ~LyXText();
  65
  66         ///
  67         LyXFont GetFont(LyXParagraph* par, int pos);
  68         ///
  69         void SetCharFont(LyXParagraph *par, int pos, LyXFont font);
  70
  71         /// returns a pointer to the very first LyXParagraph
  72         LyXParagraph *FirstParagraph();
  73
  74         /// what you expect when pressing <enter> at cursor position
  75         void BreakParagraph(char keep_layout = 0);
  76
  77         /** set layout over selection and make a total rebreak of
  78           those paragraphs
  79           */
  80         void SetLayout(char layout);
  81
  82         /// used in setlayout
  83         void MakeFontEntriesLayoutSpecific(LyXParagraph *par);
  84
  85         /** increment depth over selection and make a total rebreak of those
  86           paragraphs
  87           */
  88         void IncDepth();
  89
  90         /** decrement depth over selection and make a total rebreak of those
  91           paragraphs */
  92         void DecDepth();
  93
  94         /** Get the depth at current cursor position
  95          */
  96         int GetDepth() { return cursor.par->GetDepth(); }
  97
  98         /** set font over selection and make a total rebreak of those
  99           paragraphs.
 100           toggleall defaults to false.
 101           */
 102         void SetFont(LyXFont font, bool toggleall=false);
 103
 104         /** deletes and inserts again all paragaphs between the cursor
 105           and the specified par .The Cursor is needed to set the refreshing
 106           parameters.
 107           This function is needed after SetLayout and SetFont etc.
 108           */
 109         void RedoParagraphs(LyXCursor cursor, LyXParagraph *end_par);
 110         ///
 111         void RedoParagraph();
 112
 113         ///
 114         void ToggleFree(LyXFont font,bool toggleall=false);
 115
 116         /** recalculates the heights of all previous rows of the
 117             specified paragraph.  needed, if the last characters font
 118             has changed.
 119             */
 120         void RedoHeightOfParagraph(LyXCursor cursor);
 121
 122         /** forces the redrawing of a paragraph. Needed when manipulating a
 123             right address box
 124             */
 125         void RedoDrawingOfParagraph(LyXCursor cursor);
 126
 127         /** insert a character, moves all the following breaks in the
 128           same Paragraph one to the right and make a little rebreak
 129           */
 130         void InsertChar(char c);
 131         ///
 132         void InsertInset(Inset *inset);
 133
 134         /// completes the insertion with a full rebreak
 135         int FullRebreak();
 136
 137         /// may be important for the menu
 138         char* GetLayout(int row);
 139         ///
 140         LyXParagraph::footnote_flag GetFootnoteFlag(int row);
 141         ///
 142         Row* need_break_row;
 143         ///
 144         long refresh_y;
 145         ///
 146         int refresh_height;
 147         ///
 148         int refresh_width;
 149         ///
 150         int refresh_x;
 151         ///
 152         Row *refresh_row;
 153         ///
 154         int refresh_pos;
 155
 156         /** wether the screen needs a refresh,
 157            starting with refresh_y
 158            */
 159         text_status status;
 160
 161         /** returns a pointer to the row near the specified y-coordinate
 162           (relative to the whole text). y is set to the real beginning
 163           of this row
 164           */
 165         Row* GetRowNearY(long &y);
 166
 167         /** returns the column near the specified x-coordinate of the row
 168          x is set to the real beginning of this column
 169          */
 170         int GetColumnNearX(Row *row, int& x);
 171
 172         /** returns a pointer to a specified row. y is set to the beginning
 173          of the row
 174          */
 175         Row* GetRow(LyXParagraph *par, int pos, long &y);
 176
 177         /** returns the height of a default row, needed  for scrollbar
 178          */
 179         int DefaultHeight();
 180
 181         /** The cursor.
 182           Later this variable has to be removed. There should be now internal
 183           cursor in a text (and thus not in a buffer). By keeping this it is
 184           (I think) impossible to have several views with the same buffer, but
 185           the cursor placed at different places.
 186           */
 187         LyXCursor cursor;
 188
 189         /* the selection cursor */
 190         ///
 191         bool selection;
 192         ///
 193         bool mark_set;
 194
 195         ///
 196         LyXCursor sel_cursor;
 197         ///
 198         LyXCursor sel_start_cursor;
 199         ///
 200         LyXCursor sel_end_cursor;
 201         /// needed for the toggling
 202         LyXCursor last_sel_cursor;
 203         ///
 204         LyXCursor toggle_cursor;
 205         ///
 206         LyXCursor toggle_end_cursor;
 207
 208         /// need the selection cursor:
 209         void SetSelection();
 210         ///
 211         void ClearSelection();
 212
 213         /// just selects the word the cursor is in
 214         void SelectWord();
 215
 216         /** 'selects" the next word, where the cursor is not in
 217          and returns this word as string. THe cursor will be moved
 218          to the beginning of this word.
 219          With SelectSelectedWord can this be highlighted really
 220          */
 221         char* SelectNextWord(float &value);
 222         ///
 223         void SelectSelectedWord();
 224         ///
 225         void SetCursor(LyXParagraph *par, int pos);
 226         ///
 227         void SetCursorIntern(LyXParagraph *par, int pos);
 228         ///
 229         void SetCursorFromCoordinates(int x, long y);
 230         ///
 231         void CursorUp();
 232         ///
 233         void CursorDown();
 234         ///
 235         void CursorLeft();
 236         ///
 237         void CursorRight();
 238         ///
 239         void CursorLeftOneWord();
 240         ///
 241         void CursorRightOneWord();
 242         ///
 243         void CursorUpParagraph();
 244         ///
 245         void CursorDownParagraph();
 246         ///
 247         void CursorHome();
 248         ///
 249         void CursorEnd();
 250         ///
 251         void CursorTab();
 252         ///
 253         void CursorTop();
 254         ///
 255         void CursorBottom();
 256         ///
 257         void Delete();
 258         ///
 259         void Backspace();
 260         ///
 261         void DeleteWordForward();
 262         ///
 263         void DeleteWordBackward();
 264         ///
 265         void DeleteLineForward();
 266         ///
 267         int SelectWordWhenUnderCursor();
 268         /// Change the case of the word at cursor position
 269         /** action is 0 for lower case, 1 for capitalization and 2 for
 270             uppercase.
 271          */
 272         void ChangeWordCase(int action);
 273
 274         /** returns a printed row in a pixmap. The y value is needed to
 275           decide, wether it is selected text or not. This is a strange
 276           solution but faster.
 277          */
 278         void GetVisibleRow(LyXScreen &scr, int offset,
 279                            Row *row_ptr, long y);
 280
 281         /* footnotes: */
 282         ///
 283         void ToggleFootnote();
 284         ///
 285         void OpenStuff();
 286         ///
 287         void OpenFootnotes();
 288         ///
 289         void OpenFootnote();
 290         ///
 291         void CloseFootnotes();
 292         ///
 293         void CloseFootnote();
 294
 295         /** turn the selection into a new environment. If there is no
 296           selection, create an empty environment
 297          */
 298         void InsertFootnoteEnvironment(LyXParagraph::footnote_kind kind);
 299         ///
 300         void MeltFootnoteEnvironment();
 301         ///
 302         void CutSelection(bool = true);
 303         ///
 304         void CopySelection();
 305         ///
 306         void PasteSelection();
 307         ///
 308         void copyEnvironmentType();
 309         ///
 310         void pasteEnvironmentType();
 311         ///
 312         void InsertFootnote();
 313         ///
 314         void InsertMarginpar();
 315         ///
 316         void InsertFigure();
 317         ///
 318         void InsertTabular();
 319
 320         /** the DTP switches for paragraphs. LyX will store the top settings
 321          always in the first physical paragraph, the bottom settings in the
 322          last. When a paragraph is broken, the top settings rest, the bottom
 323          settings are given to the new one. So I can make shure, they do not
 324          duplicate themself (and you cannnot make dirty things with them! )
 325          */
 326         void SetParagraph(bool line_top, bool line_bottom,
 327                           bool pagebreak_top, bool pagebreak_bottom,
 328                           VSpace space_top, VSpace space_bottom,
 329                           char align,
 330                           string labelwidthstring,
 331                           bool noindent);
 332         void SetParagraphExtraOpt(int type,
 333                                   const char *width,
 334                                   const char *widthp,
 335                                   int alignment, bool hfill,
 336                                   bool start_minipage);
 337
 338         /* these things are for search and replace */
 339
 340         /** returns true if the specified string is at the specified
 341           position
 342           */
 343         bool IsStringInText(LyXParagraph *par, int pos, char const* string);
 344
 345         /** sets the selection over the number of characters of string,
 346           no check!!
 347           */
 348         void SetSelectionOverString(char const* string);
 349
 350         /** simple replacing. The font of the first selected character
 351           is used
 352           */
 353         void ReplaceSelectionWithString(char const* string);
 354
 355         /** if the string can be found: return true and set the cursor to
 356           the new position */
 357         bool SearchForward(char const* string);
 358         bool SearchBackward(char const* string);
 359
 360         /// needed to insert the selection
 361         void InsertStringA(char* string);
 362         /// needed to insert the selection
 363         void InsertStringB(char* string);
 364
 365         /// usefull when texing from within LyX
 366         bool GotoNextError();
 367
 368         /// just another feature :)
 369         bool GotoNextNote();
 370
 371         /** needed to switch between different classes this works
 372           for a list of paragraphs beginning with the specified par
 373           return value is the number of wrong conversions
 374           */
 375         int SwitchLayoutsBetweenClasses(char class1, char class2, LyXParagraph *par);
 376
 377         /* for the greater insets */
 378
 379         /// returns 0 if inset wasn't found
 380         int UpdateInset(Inset* inset);
 381         ///
 382         void CheckParagraph(LyXParagraph* par, int pos);
 383
 384         /* table stuff -- begin*/
 385
 386         /** all table features of the text-class are put together in
 387           this function. Possible values of feature are defined in table.h
 388           */
 389         void TableFeatures(int feature,string val);
 390         ///
 391         void TableFeatures(int feature);
 392         ///
 393         int NumberOfCell(LyXParagraph *par, int pos);
 394
 395         /** pos points at the beginning of the next cell (if there is one)
 396          */
 397         int WidthOfCell(LyXParagraph *par, int &pos);
 398         ///
 399         void InsertCharInTable(char c);
 400         ///
 401         void BackspaceInTable();
 402         ///
 403         void CheckParagraphInTable(LyXParagraph* par, int pos);
 404         ///
 405         char HitInTable(Row* row, int x);
 406         ///
 407         bool MouseHitInTable(int x, long y);
 408         /* table stuff -- end*/
 409         ///
 410         LyXParagraph* GetParFromID(int id);
 411
 412         // undo functions
 413         /// returns false if no undo possible
 414         bool  TextUndo();
 415         /// returns false if no redo possible
 416         bool  TextRedo();
 417         /// used by TextUndo/TextRedo
 418         bool TextHandleUndo(Undo* undo);
 419         /// makes sure the next operation will be stored
 420         void FinishUndo();
 421         /// this is dangerous and for internal use only
 422         void FreezeUndo();
 423         /// this is dangerous and for internal use only
 424         void UnFreezeUndo();
 425         /// the flag used by FinishUndo();
 426         bool undo_finished;
 427         /// a flag
 428         bool undo_frozen;
 429         ///
 430         void SetUndo(Undo::undo_kind kind, LyXParagraph *before, LyXParagraph *end);
 431         ///
 432         void SetRedo(Undo::undo_kind kind, LyXParagraph *before, LyXParagraph *end);
 433         ///
 434         Undo *CreateUndo(Undo::undo_kind kind, LyXParagraph *before, LyXParagraph *end);
 435         /// for external use in lyx_cb.C
 436         void SetCursorParUndo();
 437         ///
 438         void CursorLeftIntern();
 439         ///
 440         void CursorRightIntern();
 441         ///
 442         void RemoveTableRow(LyXCursor *cursor);
 443         ///
 444         bool IsEmptyTableRow(LyXCursor *cursor);
 445         ///
 446         bool IsEmptyTableCell();
 447         ///
 448         void toggleAppendix();
 449
 450 private:
 451         ///
 452         Row* firstrow;
 453         ///
 454         Row* lastrow;
 455
 456         /** Copybuffer for copy environment type
 457           Asger has learned that this should be a buffer-property instead
 458           Lgb has learned that 'char' is a lousy type for non-characters
 459           */
 460         char copylayouttype;
 461
 462         /// the currentrow is needed to access rows faster*/
 463         Row* currentrow;                       /* pointer to the current row  */
 464         /// position in the text
 465         long  currentrow_y;
 466         /// width of the paper
 467         unsigned short  paperwidth;
 468
 469         /** inserts a new row behind the specified row, increments
 470          * the touched counters */
 471         void InsertRow(Row *row, LyXParagraph *par, int pos );
 472
 473         /** removes the row and reset the touched counters */
 474         void RemoveRow(Row *row);
 475
 476         /** remove all following rows of the paragraph of the specified row. */
 477         void RemoveParagraph(Row *row);
 478
 479         /** insert the specified paragraph behind the specified row */
 480         void InsertParagraph(LyXParagraph *par, Row *row);
 481
 482         /** appends  the implizit specified paragraph behind the specified row,
 483          * start at the implizit given position */
 484         void AppendParagraph(Row *row);
 485
 486         ///
 487         void BreakAgain(Row *row);
 488         ///
 489         void BreakAgainOneRow(Row *row);
 490         ///
 491         void SetHeightOfRow(Row *row_ptr); /* calculate and set the height
 492                                             * of the row */
 493
 494         /** this calculates the specified parameters. needed when setting
 495          * the cursor and when creating a visible row */
 496         void PrepareToPrint(Row *row, float &x, float &fill_separator,
 497                             float &fill_hfill, float &fill_label_hfill);
 498         ///
 499         void DeleteEmptyParagraphMechanism(LyXCursor old_cursor);
 500
 501         /** Updates all counters starting BEHIND the row. Changed paragraphs
 502          * with a dynamic left margin will be rebroken. */
 503         void UpdateCounters(Row *row);
 504         ///
 505         void SetCounter(LyXParagraph *par);
 506
 507         /*
 508          * some low level functions
 509          */
 510
 511         ///
 512         int SingleWidth(LyXParagraph *par, int pos);
 513         ///
 514         int SingleWidth(LyXParagraph *par, int pos, char c);
 515         ///
 516         void Draw(Row *row, int &pos, LyXScreen &scr, int offset, float &x);
 517         /// get the next breakpoint in a given paragraph
 518         int NextBreakPoint(Row* row, int width);
 519         /// returns the minimum space a row needs on the screen in pixel
 520         int Fill(Row *row, int paperwidth);
 521
 522         /** returns the minimum space a manual label needs on the
 523           screen in pixel */
 524         int LabelFill(Row *row);
 525
 526         ///
 527         int BeginningOfMainBody(LyXParagraph *par);
 528
 529         /** Returns the left beginning of the text.
 530           This information cannot be taken from the layouts-objekt, because
 531           in LaTeX the beginning of the text fits in some cases
 532           (for example sections) exactly the label-width.
 533           */
 534         int LeftMargin(Row *row);
 535         ///
 536         int RightMargin(Row *row);
 537         ///
 538         int LabelEnd (Row *row);
 539
 540         /** returns the number of separators in the specified row.
 541           The separator on the very last column doesnt count
 542           */
 543         int NumberOfSeparators(Row *row);
 544
 545         /** returns the number of hfills in the specified row. The
 546           LyX-Hfill is a LaTeX \hfill so that the hfills at the
 547           beginning and at the end were ignored. This is {\em MUCH}
 548           more usefull than not to ignore!
 549           */
 550         int NumberOfHfills(Row *row);
 551
 552         /// like NumberOfHfills, but only those in the manual label!
 553         int NumberOfLabelHfills(Row *row);
 554
 555         /** returns true, if a expansion is needed. Rules are given by
 556           LaTeX
 557           */
 558         bool HfillExpansion(Row *row_ptr, int pos);
 559
 560         /** returns the paragraph position of the last character in the
 561           specified row
 562           */
 563         int RowLast(Row *row);
 564 };
 565
 566 #endif