2 /* This file is part of
3 * ======================================================
5 * LyX, The Document Processor
7 * Copyright 1995 Matthias Ettrich
8 * Copyright 1995-2000 The LyX Team.
10 * ====================================================== */
21 #include "lyxcursor.h"
22 #include "lyxparagraph.h"
33 This class holds the mapping between buffer paragraphs and screen rows.
44 NEED_VERY_LITTLE_REFRESH,
50 LyXText(BufferView *);
57 void init(BufferView *);
59 mutable int number_of_rows;
63 mutable unsigned int width;
64 /// the current font settings
65 mutable LyXFont current_font;
67 mutable LyXFont real_current_font;
68 /// first visible pixel-row is set from LyXScreen!!!
69 // unsigned is wrong here for text-insets!
72 BufferView * bv_owner;
74 InsetText * inset_owner;
76 UpdatableInset * the_locking_inset;
79 int GetRealCursorX(BufferView *) const;
81 LyXFont const GetFont(Buffer const *, LyXParagraph * par,
82 LyXParagraph::size_type pos) const;
84 void SetCharFont(Buffer const *, LyXParagraph * par,
85 LyXParagraph::size_type pos,
86 LyXFont const & font);
87 /// returns a pointer to the very first LyXParagraph
88 LyXParagraph * FirstParagraph() const;
90 /// what you expect when pressing <enter> at cursor position
91 void BreakParagraph(BufferView *, char keep_layout = 0);
93 /** set layout over selection and make a total rebreak of
96 LyXParagraph * SetLayout(BufferView *, LyXCursor & actual_cursor,
97 LyXCursor & selection_start,
98 LyXCursor & selection_end,
99 LyXTextClass::size_type layout);
100 void SetLayout(BufferView *, LyXTextClass::size_type layout);
102 /// used in setlayout
103 void MakeFontEntriesLayoutSpecific(Buffer const *, LyXParagraph * par);
105 /** increment depth over selection and make a total rebreak of those
108 void IncDepth(BufferView *);
110 /** decrement depth over selection and make a total rebreak of those
112 void DecDepth(BufferView *);
114 /** Get the depth at current cursor position
116 int GetDepth() const { return cursor.par()->GetDepth(); }
118 /** set font over selection and make a total rebreak of those
120 toggleall defaults to false.
122 void SetFont(BufferView *, LyXFont const &, bool toggleall = false);
124 /** deletes and inserts again all paragaphs between the cursor
125 and the specified par. The Cursor is needed to set the refreshing
127 This function is needed after SetLayout and SetFont etc.
129 void RedoParagraphs(BufferView *, LyXCursor const & cursor,
130 LyXParagraph const * end_par) const;
132 void RedoParagraph(BufferView *) const;
135 void ToggleFree(BufferView *, LyXFont const &, bool toggleall = false);
137 /** recalculates the heights of all previous rows of the
138 specified paragraph. needed, if the last characters font
141 void RedoHeightOfParagraph(BufferView *, LyXCursor const & cursor);
143 /** forces the redrawing of a paragraph. Needed when manipulating a
146 void RedoDrawingOfParagraph(BufferView *, LyXCursor const & cursor);
148 /** insert a character, moves all the following breaks in the
149 same Paragraph one to the right and make a little rebreak
151 void InsertChar(BufferView *, char c);
153 void InsertInset(BufferView *, Inset * inset);
155 /** Completes the insertion with a full rebreak.
156 Returns true if something was broken. */
157 bool FullRebreak(BufferView *);
161 LyXParagraph::footnote_flag GetFootnoteFlag(int row);
164 Row * need_break_row;
166 mutable int refresh_y;
174 mutable Row * refresh_row;
178 /** wether the screen needs a refresh,
179 starting with refresh_y
181 mutable text_status status;
183 /** returns a pointer to the row near the specified y-coordinate
184 (relative to the whole text). y is set to the real beginning
187 Row * GetRowNearY(int & y) const;
189 /** returns the column near the specified x-coordinate of the row
190 x is set to the real beginning of this column
192 int GetColumnNearX(BufferView *, Row * row,
193 int & x, bool & boundary) const;
195 /** returns a pointer to a specified row. y is set to the beginning
198 Row * GetRow(LyXParagraph * par,
199 LyXParagraph::size_type pos, int & y) const;
201 /** returns the height of a default row, needed for scrollbar
203 int DefaultHeight() const;
206 Later this variable has to be removed. There should be now internal
207 cursor in a text (and thus not in a buffer). By keeping this it is
208 (I think) impossible to have several views with the same buffer, but
209 the cursor placed at different places.
211 Since the LyXText now has been moved from Buffer to BufferView
212 it should not be absolutely needed to move the cursor...
214 mutable LyXCursor cursor;
216 /* the selection cursor */
218 mutable bool selection;
220 mutable bool mark_set;
223 mutable LyXCursor sel_cursor;
225 LyXCursor sel_start_cursor;
227 mutable LyXCursor sel_end_cursor;
228 /// needed for the toggling
229 LyXCursor last_sel_cursor;
231 LyXCursor toggle_cursor;
233 LyXCursor toggle_end_cursor;
235 /// need the selection cursor:
236 void SetSelection(BufferView *);
238 void ClearSelection(BufferView *) const;
240 string const selectionAsString(Buffer const *) const;
242 /// just selects the word the cursor is in
243 void SelectWord(BufferView *);
245 /** 'selects" the next word, where the cursor is not in
246 and returns this word as string. THe cursor will be moved
247 to the beginning of this word.
248 With SelectSelectedWord can this be highlighted really
250 string const SelectNextWord(BufferView *, float & value) const;
252 void SelectSelectedWord(BufferView *);
254 void SetCursor(BufferView *, LyXParagraph * par,
255 LyXParagraph::size_type pos,
257 bool boundary = false) const;
259 void SetCursor(BufferView *, LyXCursor &, LyXParagraph * par,
260 LyXParagraph::size_type pos,
261 bool boundary = false) const;
263 void SetCursorIntern(BufferView *, LyXParagraph * par,
264 LyXParagraph::size_type pos,
266 bool boundary = false) const;
268 void SetCurrentFont(BufferView *) const;
271 bool IsBoundary(Buffer const *, LyXParagraph * par,
272 LyXParagraph::size_type pos) const;
274 bool IsBoundary(Buffer const *, LyXParagraph * par,
275 LyXParagraph::size_type pos,
276 LyXFont const & font) const;
279 void SetCursorFromCoordinates(BufferView *, int x, int y) const;
281 void SetCursorFromCoordinates(BufferView *, LyXCursor &,
284 void CursorUp(BufferView *) const;
286 void CursorDown(BufferView *) const;
288 void CursorLeft(BufferView *, bool internal = true) const;
290 void CursorRight(BufferView *, bool internal = true) const;
292 void CursorLeftOneWord(BufferView *) const;
294 void CursorRightOneWord(BufferView *) const;
296 void CursorUpParagraph(BufferView *) const;
298 void CursorDownParagraph(BufferView *) const;
300 void CursorHome(BufferView *) const;
302 void CursorEnd(BufferView *) const;
304 void CursorTab(BufferView *) const;
306 void CursorTop(BufferView *) const;
308 void CursorBottom(BufferView *) const;
310 void Delete(BufferView *);
312 void Backspace(BufferView *);
314 void DeleteWordForward(BufferView *);
316 void DeleteWordBackward(BufferView *);
318 void DeleteLineForward(BufferView *);
320 bool SelectWordWhenUnderCursor(BufferView *);
326 text_capitalization = 1,
330 /// Change the case of the word at cursor position.
331 void ChangeWordCase(BufferView *, TextCase action);
332 void TransposeChars(BufferView const &);
334 /** returns a printed row in a pixmap. The y value is needed to
335 decide, wether it is selected text or not. This is a strange
338 void GetVisibleRow(BufferView *, int y_offset, int x_offset,
339 Row * row_ptr, int y, bool cleared=false);
344 void ToggleFootnote(BufferView *);
346 void OpenStuff(BufferView *);
348 void OpenFootnotes();
350 void OpenFootnote(BufferView *);
352 void CloseFootnotes();
354 void CloseFootnote(BufferView *);
356 /** turn the selection into a new environment. If there is no
357 selection, create an empty environment
359 void InsertFootnoteEnvironment(BufferView *,
360 LyXParagraph::footnote_kind kind);
362 void MeltFootnoteEnvironment(BufferView *);
365 void CutSelection(BufferView *, bool = true);
367 void CopySelection(BufferView *);
369 void PasteSelection(BufferView *);
371 void copyEnvironmentType();
373 void pasteEnvironmentType(BufferView *);
375 void InsertFootnote();
377 void InsertMarginpar();
381 void InsertTabular();
383 /** the DTP switches for paragraphs. LyX will store the top settings
384 always in the first physical paragraph, the bottom settings in the
385 last. When a paragraph is broken, the top settings rest, the bottom
386 settings are given to the new one. So I can make shure, they do not
387 duplicate themself (and you cannnot make dirty things with them! )
389 void SetParagraph(BufferView *,
390 bool line_top, bool line_bottom,
391 bool pagebreak_top, bool pagebreak_bottom,
392 VSpace const & space_top,
393 VSpace const & space_bottom,
395 string labelwidthstring,
399 void SetParagraphExtraOpt(BufferView *, int type,
400 string const & width,
401 string const & widthp,
402 int alignment, bool hfill,
403 bool start_minipage);
405 /* these things are for search and replace */
407 /** sets the selection over the number of characters of string,
410 void SetSelectionOverString(BufferView *, string const & str);
412 /** simple replacing. The font of the first selected character
415 void ReplaceSelectionWithString(BufferView *, string const & str);
417 /// needed to insert the selection
418 void InsertStringA(BufferView *, string const & str);
419 /// needed to insert the selection
420 void InsertStringB(BufferView *, string const & str);
422 /// Find next inset of some specified type.
423 bool GotoNextInset(BufferView *, std::vector<Inset::Code> const & codes,
424 string const & contents = string()) const;
427 /* for the greater insets */
429 /// returns false if inset wasn't found
430 bool UpdateInset(BufferView *, Inset *);
432 void CheckParagraph(BufferView *, LyXParagraph * par,
433 LyXParagraph::size_type pos);
435 int NumberOfCell(LyXParagraph * par,
436 LyXParagraph::size_type pos) const;
438 LyXParagraph * GetParFromID(int id);
441 /// returns false if no undo possible
442 bool TextUndo(BufferView *);
443 /// returns false if no redo possible
444 bool TextRedo(BufferView *);
445 /// used by TextUndo/TextRedo
446 bool TextHandleUndo(BufferView *, Undo * undo);
447 /// makes sure the next operation will be stored
449 /// this is dangerous and for internal use only
451 /// this is dangerous and for internal use only
453 /// the flag used by FinishUndo();
454 mutable bool undo_finished;
458 void SetUndo(Buffer *, Undo::undo_kind kind,
459 LyXParagraph const * before,
460 LyXParagraph const * end) const;
462 void SetRedo(Buffer *, Undo::undo_kind kind,
463 LyXParagraph const * before,
464 LyXParagraph const * end);
466 Undo * CreateUndo(Buffer *, Undo::undo_kind kind,
467 LyXParagraph const * before,
468 LyXParagraph const * end) const;
469 /// for external use in lyx_cb.C
470 void SetCursorParUndo(Buffer *);
472 void RemoveTableRow(LyXCursor & cursor) const;
474 bool IsEmptyTableCell() const;
476 void toggleAppendix(BufferView *);
478 int workWidth(BufferView *) const;
480 void ComputeBidiTables(Buffer const *, Row * row) const;
482 /// Maps positions in the visual string to positions in logical string.
484 LyXParagraph::size_type log2vis(LyXParagraph::size_type pos) const {
485 if (bidi_start == -1)
488 return log2vis_list[pos-bidi_start];
491 /// Maps positions in the logical string to positions in visual string.
493 LyXParagraph::size_type vis2log(LyXParagraph::size_type pos) const {
494 if (bidi_start == -1)
497 return vis2log_list[pos-bidi_start];
501 LyXParagraph::size_type bidi_level(LyXParagraph::size_type pos) const {
502 if (bidi_start == -1)
505 return bidi_levels[pos-bidi_start];
509 bool bidi_InRange(LyXParagraph::size_type pos) const {
510 return bidi_start == -1 ||
511 (bidi_start <= pos && pos <= bidi_end);
517 mutable Row * firstrow;
519 mutable Row * lastrow;
521 /** Copybuffer for copy environment type.
522 Asger has learned that this should be a buffer-property instead
523 Lgb has learned that 'char' is a lousy type for non-characters
525 LyXTextClass::size_type copylayouttype;
527 /** inserts a new row behind the specified row, increments
528 the touched counters */
529 void InsertRow(Row * row, LyXParagraph * par,
530 LyXParagraph::size_type pos) const;
531 /** removes the row and reset the touched counters */
532 void RemoveRow(Row * row) const;
534 /** remove all following rows of the paragraph of the specified row. */
535 void RemoveParagraph(Row * row) const;
537 /** insert the specified paragraph behind the specified row */
538 void InsertParagraph(BufferView *,
539 LyXParagraph * par, Row * row) const;
541 /** appends the implizit specified paragraph behind the specified row,
542 * start at the implizit given position */
543 void AppendParagraph(BufferView *, Row * row) const;
546 void BreakAgain(BufferView *, Row * row) const;
548 void BreakAgainOneRow(BufferView *, Row * row);
549 /// Calculate and set the height of the row
550 void SetHeightOfRow(BufferView *, Row * row_ptr) const;
552 /** this calculates the specified parameters. needed when setting
553 * the cursor and when creating a visible row */
554 void PrepareToPrint(BufferView *, Row * row, float & x,
555 float & fill_separator,
557 float & fill_label_hfill,
558 bool bidi = true) const;
561 void DeleteEmptyParagraphMechanism(BufferView *,
562 LyXCursor const & old_cursor) const;
564 /** Updates all counters starting BEHIND the row. Changed paragraphs
565 * with a dynamic left margin will be rebroken. */
566 void UpdateCounters(BufferView *, Row * row) const;
568 void SetCounter(Buffer const *, LyXParagraph * par) const;
571 * some low level functions
575 int SingleWidth(BufferView *, LyXParagraph * par,
576 LyXParagraph::size_type pos) const;
578 int SingleWidth(BufferView *, LyXParagraph * par,
579 LyXParagraph::size_type pos, char c) const;
581 void draw(BufferView *, Row const * row,
582 LyXParagraph::size_type & pos,
583 int offset, float & x, bool cleared);
585 /// get the next breakpoint in a given paragraph
586 LyXParagraph::size_type NextBreakPoint(BufferView *, Row const * row,
588 /// returns the minimum space a row needs on the screen in pixel
589 int Fill(BufferView *, Row * row, int workwidth) const;
591 /** returns the minimum space a manual label needs on the
593 int LabelFill(BufferView *, Row const * row) const;
596 LyXParagraph::size_type
597 BeginningOfMainBody(Buffer const *, LyXParagraph const * par) const;
599 /** Returns the left beginning of the text.
600 This information cannot be taken from the layouts-objekt, because
601 in LaTeX the beginning of the text fits in some cases
602 (for example sections) exactly the label-width.
604 int LeftMargin(BufferView *, Row const * row) const;
606 int RightMargin(Buffer const *, Row const * row) const;
608 int LabelEnd (BufferView *, Row const * row) const;
610 /** returns the number of separators in the specified row.
611 The separator on the very last column doesnt count
613 int NumberOfSeparators(Buffer const *, Row const * row) const;
615 /** returns the number of hfills in the specified row. The
616 LyX-Hfill is a LaTeX \hfill so that the hfills at the
617 beginning and at the end were ignored. This is {\em MUCH}
618 more usefull than not to ignore!
620 int NumberOfHfills(Buffer const *, Row const * row) const;
622 /// like NumberOfHfills, but only those in the manual label!
623 int NumberOfLabelHfills(Buffer const *, Row const * row) const;
624 /** returns true, if a expansion is needed. Rules are given by
627 bool HfillExpansion(Buffer const *, Row const * row_ptr,
628 LyXParagraph::size_type pos) const;
632 mutable std::vector<LyXParagraph::size_type> log2vis_list;
635 mutable std::vector<LyXParagraph::size_type> vis2log_list;
638 mutable std::vector<LyXParagraph::size_type> bidi_levels;
641 mutable LyXParagraph::size_type bidi_start;
644 mutable LyXParagraph::size_type bidi_end;
647 mutable bool bidi_same_direction;
650 unsigned char TransformChar(unsigned char c, LyXParagraph * par,
651 LyXParagraph::size_type pos) const;
653 /** returns the paragraph position of the last character in the
656 LyXParagraph::size_type RowLast(Row const * row) const;
658 LyXParagraph::size_type RowLastPrintable(Row const * row) const;
663 // special owner functions
665 LyXParagraph * OwnerParagraph() const;
667 LyXParagraph * OwnerParagraph(LyXParagraph *) const;
671 /* returns a pointer to the row near the specified y-coordinate
672 * (relative to the whole text). y is set to the real beginning
675 Row * LyXText::GetRowNearY(int & y) const
677 // If possible we should optimize this method. (Lgb)
678 Row * tmprow = firstrow;
681 while (tmprow->next() && tmpy + tmprow->height() <= y) {
682 tmpy += tmprow->height();
683 tmprow = tmprow->next();
686 y = tmpy; // return the real y