2 /* This file is part of
3 * ======================================================
5 * LyX, The Document Processor
7 * Copyright 1995 Matthias Ettrich
8 * Copyright 1995-2001 The LyX Team.
10 * ====================================================== */
20 #include "lyxcursor.h"
21 #include "paragraph.h"
34 This class holds the mapping between buffer paragraphs and screen rows.
45 NEED_VERY_LITTLE_REFRESH = 2,
51 // the word around the cursor, only if the cursor is
54 // the word around the cursor
56 /// the word begining from the cursor position
58 /// the word around the cursor or before the cursor
60 /// the next word (not yet used)
65 LyXText(BufferView *);
72 void init(BufferView *, bool reinit = false);
74 mutable int number_of_rows;
78 mutable unsigned int width;
79 /// the current font settings
80 mutable LyXFont current_font;
82 mutable LyXFont real_current_font;
83 /// first visible pixel-row is set from LyXScreen!!!
84 // unsigned is wrong here for text-insets!
87 BufferView * bv_owner;
89 InsetText * inset_owner;
91 UpdatableInset * the_locking_inset;
94 int getRealCursorX(BufferView *) const;
96 LyXFont const getFont(Buffer const *, Paragraph * par,
97 Paragraph::size_type pos) const;
99 void setCharFont(Buffer const *, Paragraph * par,
100 Paragraph::size_type pos, LyXFont const & font);
101 void setCharFont(BufferView *, Paragraph * par,
102 Paragraph::size_type pos,
103 LyXFont const & font, bool toggleall);
104 /// returns a pointer to the very first Paragraph
105 Paragraph * firstParagraph() const;
107 /// what you expect when pressing <enter> at cursor position
108 void breakParagraph(BufferView *, char keep_layout = 0);
110 /** set layout over selection and make a total rebreak of
113 Paragraph * setLayout(BufferView *, LyXCursor & actual_cursor,
114 LyXCursor & selection_start,
115 LyXCursor & selection_end,
116 LyXTextClass::size_type layout);
117 void setLayout(BufferView *, LyXTextClass::size_type layout);
119 /// used in setlayout
120 void makeFontEntriesLayoutSpecific(Buffer const *, Paragraph * par);
122 /** increment depth over selection and make a total rebreak of those
125 void incDepth(BufferView *);
127 /** decrement depth over selection and make a total rebreak of those
129 void decDepth(BufferView *);
131 /** Get the depth at current cursor position
133 int getDepth() const { return cursor.par()->getDepth(); }
135 /** set font over selection and make a total rebreak of those
137 toggleall defaults to false.
139 void setFont(BufferView *, LyXFont const &, bool toggleall = false);
141 /** deletes and inserts again all paragaphs between the cursor
142 and the specified par. The Cursor is needed to set the refreshing
144 This function is needed after SetLayout and SetFont etc.
146 void redoParagraphs(BufferView *, LyXCursor const & cursor,
147 Paragraph const * end_par) const;
149 void redoParagraph(BufferView *) const;
152 void toggleFree(BufferView *, LyXFont const &, bool toggleall = false);
154 /** recalculates the heights of all previous rows of the
155 specified paragraph. needed, if the last characters font
158 void redoHeightOfParagraph(BufferView *, LyXCursor const & cursor);
160 /** forces the redrawing of a paragraph. Needed when manipulating a
163 void redoDrawingOfParagraph(BufferView *, LyXCursor const & cursor);
165 /** insert a character, moves all the following breaks in the
166 same Paragraph one to the right and make a little rebreak
168 void insertChar(BufferView *, char c);
170 void insertInset(BufferView *, Inset * inset);
172 /** Completes the insertion with a full rebreak.
173 Returns true if something was broken. */
174 bool fullRebreak(BufferView *);
177 Row * need_break_row;
179 mutable int refresh_y;
187 mutable Row * refresh_row;
191 /// give and set the LyXText status
192 text_status status() const;
193 void status(BufferView *, text_status) const;
196 /** wether the screen needs a refresh,
197 starting with refresh_y
199 mutable text_status status_;
202 /** returns a pointer to the row near the specified y-coordinate
203 (relative to the whole text). y is set to the real beginning
206 Row * getRowNearY(int & y) const;
208 /** returns the column near the specified x-coordinate of the row
209 x is set to the real beginning of this column
211 int getColumnNearX(BufferView *, Row * row,
212 int & x, bool & boundary) const;
214 /** returns a pointer to a specified row. y is set to the beginning
217 Row * getRow(Paragraph * par,
218 Paragraph::size_type pos, int & y) const;
220 /** returns the height of a default row, needed for scrollbar
222 int defaultHeight() const;
225 Later this variable has to be removed. There should be now internal
226 cursor in a text (and thus not in a buffer). By keeping this it is
227 (I think) impossible to have several views with the same buffer, but
228 the cursor placed at different places.
230 Since the LyXText now has been moved from Buffer to BufferView
231 it should not be absolutely needed to move the cursor...
233 mutable LyXCursor cursor;
235 /** The structrue that keeps track of the selections set. */
238 : set_(false), mark_(false)
256 bool set_; // former selection
257 bool mark_; // former mark_set
260 mutable Selection selection;
262 /// needed for the toggling
263 LyXCursor last_sel_cursor;
265 LyXCursor toggle_cursor;
267 LyXCursor toggle_end_cursor;
269 /// need the selection cursor:
270 void setSelection(BufferView *);
272 void clearSelection(BufferView *) const;
274 string const selectionAsString(Buffer const *) const;
276 /// select the word we need depending on word_location
277 void getWord(LyXCursor & from, LyXCursor & to,
278 word_location const) const;
279 /// just selects the word the cursor is in
280 void selectWord(BufferView *, word_location const);
281 /// returns the inset at cursor (if it exists), 0 otherwise
282 Inset * getInset() const;
284 /** 'selects" the next word, where the cursor is not in
285 and returns this word as string. THe cursor will be moved
286 to the beginning of this word.
287 With SelectSelectedWord can this be highlighted really
289 string const selectNextWord(BufferView *, float & value) const;
291 void selectSelectedWord(BufferView *);
293 void setCursor(BufferView *, Paragraph * par,
294 Paragraph::size_type pos,
296 bool boundary = false) const;
298 void setCursor(BufferView *, LyXCursor &, Paragraph * par,
299 Paragraph::size_type pos,
300 bool boundary = false) const;
302 void setCursorIntern(BufferView *, Paragraph * par,
303 Paragraph::size_type pos,
305 bool boundary = false) const;
307 void setCurrentFont(BufferView *) const;
310 bool isBoundary(Buffer const *, Paragraph * par,
311 Paragraph::size_type pos) const;
313 bool isBoundary(Buffer const *, Paragraph * par,
314 Paragraph::size_type pos,
315 LyXFont const & font) const;
318 void setCursorFromCoordinates(BufferView *, int x, int y) const;
320 void setCursorFromCoordinates(BufferView *, LyXCursor &,
323 void cursorUp(BufferView *) const;
325 void cursorDown(BufferView *) const;
327 void cursorLeft(BufferView *, bool internal = true) const;
329 void cursorRight(BufferView *, bool internal = true) const;
331 void cursorLeftOneWord(BufferView *) const;
333 void cursorLeftOneWord(LyXCursor &) const;
335 void cursorRightOneWord(BufferView *) const;
337 void cursorUpParagraph(BufferView *) const;
339 void cursorDownParagraph(BufferView *) const;
341 void cursorHome(BufferView *) const;
343 void cursorEnd(BufferView *) const;
345 void cursorTab(BufferView *) const;
347 void cursorTop(BufferView *) const;
349 void cursorBottom(BufferView *) const;
351 void Delete(BufferView *);
353 void backspace(BufferView *);
355 void deleteWordForward(BufferView *);
357 void deleteWordBackward(BufferView *);
359 void deleteLineForward(BufferView *);
361 bool selectWordWhenUnderCursor(BufferView *,
362 word_location const);
368 text_capitalization = 1,
372 /// Change the case of the word at cursor position.
373 void changeCase(BufferView *, TextCase action);
375 void changeRegionCase(BufferView * bview,
376 LyXCursor const & from,
377 LyXCursor const & to,
378 LyXText::TextCase action);
380 void transposeChars(BufferView &);
382 /** returns a printed row in a pixmap. The y value is needed to
383 decide, wether it is selected text or not. This is a strange
386 void getVisibleRow(BufferView *, int y_offset, int x_offset,
387 Row * row_ptr, int y, bool cleared=false);
390 void toggleInset(BufferView *);
392 void cutSelection(BufferView *, bool = true);
394 void copySelection(BufferView *);
396 void pasteSelection(BufferView *);
398 void copyEnvironmentType();
400 void pasteEnvironmentType(BufferView *);
402 /** the DTP switches for paragraphs. LyX will store the top settings
403 always in the first physical paragraph, the bottom settings in the
404 last. When a paragraph is broken, the top settings rest, the bottom
405 settings are given to the new one. So I can make shure, they do not
406 duplicate themself (and you cannnot make dirty things with them! )
408 void setParagraph(BufferView *,
409 bool line_top, bool line_bottom,
410 bool pagebreak_top, bool pagebreak_bottom,
411 VSpace const & space_top,
412 VSpace const & space_bottom,
414 string labelwidthstring,
417 /* these things are for search and replace */
419 /** sets the selection over the number of characters of string,
422 void setSelectionOverString(BufferView *, string const & str);
424 /** simple replacing. The font of the first selected character
427 void replaceSelectionWithString(BufferView *, string const & str);
429 /// needed to insert the selection
430 void insertStringAsLines(BufferView *, string const & str);
431 /// needed to insert the selection
432 void insertStringAsParagraphs(BufferView *, string const & str);
434 /// Find next inset of some specified type.
435 bool gotoNextInset(BufferView *, std::vector<Inset::Code> const & codes,
436 string const & contents = string()) const;
439 /* for the greater insets */
441 /// returns false if inset wasn't found
442 bool updateInset(BufferView *, Inset *);
444 void checkParagraph(BufferView *, Paragraph * par,
445 Paragraph::size_type pos);
447 int numberOfCell(Paragraph * par,
448 Paragraph::size_type pos) const;
450 void removeTableRow(LyXCursor & cursor) const;
452 bool isEmptyTableCell() const;
454 void toggleAppendix(BufferView *);
456 int workWidth(BufferView *) const;
458 void computeBidiTables(Buffer const *, Row * row) const;
460 /// Maps positions in the visual string to positions in logical string.
462 Paragraph::size_type log2vis(Paragraph::size_type pos) const {
463 if (bidi_start == -1)
466 return log2vis_list[pos-bidi_start];
469 /// Maps positions in the logical string to positions in visual string.
471 Paragraph::size_type vis2log(Paragraph::size_type pos) const {
472 if (bidi_start == -1)
475 return vis2log_list[pos-bidi_start];
479 Paragraph::size_type bidi_level(Paragraph::size_type pos) const {
480 if (bidi_start == -1)
483 return bidi_levels[pos-bidi_start];
487 bool bidi_InRange(Paragraph::size_type pos) const {
488 return bidi_start == -1 ||
489 (bidi_start <= pos && pos <= bidi_end);
493 mutable Row * firstrow;
495 mutable Row * lastrow;
497 /** Copybuffer for copy environment type.
498 Asger has learned that this should be a buffer-property instead
499 Lgb has learned that 'char' is a lousy type for non-characters
501 LyXTextClass::size_type copylayouttype;
503 /** inserts a new row behind the specified row, increments
504 the touched counters */
505 void insertRow(Row * row, Paragraph * par,
506 Paragraph::size_type pos) const;
507 /** removes the row and reset the touched counters */
508 void removeRow(Row * row) const;
510 /** remove all following rows of the paragraph of the specified row. */
511 void removeParagraph(Row * row) const;
513 /** insert the specified paragraph behind the specified row */
514 void insertParagraph(BufferView *,
515 Paragraph * par, Row * row) const;
517 /** appends the implizit specified paragraph behind the specified row,
518 * start at the implizit given position */
519 void appendParagraph(BufferView *, Row * row) const;
522 void breakAgain(BufferView *, Row * row) const;
524 void breakAgainOneRow(BufferView *, Row * row);
525 /// Calculate and set the height of the row
526 void setHeightOfRow(BufferView *, Row * row_ptr) const;
528 /** this calculates the specified parameters. needed when setting
529 * the cursor and when creating a visible row */
530 void prepareToPrint(BufferView *, Row * row, float & x,
531 float & fill_separator,
533 float & fill_label_hfill,
534 bool bidi = true) const;
537 void deleteEmptyParagraphMechanism(BufferView *,
538 LyXCursor const & old_cursor) const;
541 /** Updates all counters starting BEHIND the row. Changed paragraphs
542 * with a dynamic left margin will be rebroken. */
543 void updateCounters(BufferView *, Row * row) const;
546 void setCounter(Buffer const *, Paragraph * par) const;
549 * some low level functions
553 int singleWidth(BufferView *, Paragraph * par,
554 Paragraph::size_type pos) const;
556 int singleWidth(BufferView *, Paragraph * par,
557 Paragraph::size_type pos, char c) const;
559 void draw(BufferView *, Row const * row,
560 Paragraph::size_type & pos,
561 int offset, float & x, bool cleared);
563 /// get the next breakpoint in a given paragraph
564 Paragraph::size_type nextBreakPoint(BufferView *, Row const * row,
566 /// returns the minimum space a row needs on the screen in pixel
567 int fill(BufferView *, Row * row, int workwidth) const;
569 /** returns the minimum space a manual label needs on the
571 int labelFill(BufferView *, Row const * row) const;
575 beginningOfMainBody(Buffer const *, Paragraph const * par) const;
577 /** Returns the left beginning of the text.
578 This information cannot be taken from the layouts-objekt, because
579 in LaTeX the beginning of the text fits in some cases
580 (for example sections) exactly the label-width.
582 int leftMargin(BufferView *, Row const * row) const;
584 int rightMargin(Buffer const *, Row const * row) const;
586 int labelEnd (BufferView *, Row const * row) const;
588 /** returns the number of separators in the specified row.
589 The separator on the very last column doesnt count
591 int numberOfSeparators(Buffer const *, Row const * row) const;
593 /** returns the number of hfills in the specified row. The
594 LyX-Hfill is a LaTeX \hfill so that the hfills at the
595 beginning and at the end were ignored. This is {\em MUCH}
596 more usefull than not to ignore!
598 int numberOfHfills(Buffer const *, Row const * row) const;
600 /// like NumberOfHfills, but only those in the manual label!
601 int numberOfLabelHfills(Buffer const *, Row const * row) const;
602 /** returns true, if a expansion is needed. Rules are given by
605 bool hfillExpansion(Buffer const *, Row const * row_ptr,
606 Paragraph::size_type pos) const;
608 LColor::color backgroundColor();
612 mutable std::vector<Paragraph::size_type> log2vis_list;
615 mutable std::vector<Paragraph::size_type> vis2log_list;
618 mutable std::vector<Paragraph::size_type> bidi_levels;
621 mutable Paragraph::size_type bidi_start;
624 mutable Paragraph::size_type bidi_end;
627 mutable bool bidi_same_direction;
630 unsigned char transformChar(unsigned char c, Paragraph * par,
631 Paragraph::size_type pos) const;
633 /** returns the paragraph position of the last character in the
636 Paragraph::size_type rowLast(Row const * row) const;
638 Paragraph::size_type rowLastPrintable(Row const * row) const;
644 // special owner functions
646 Paragraph * ownerParagraph() const;
648 Paragraph * ownerParagraph(Paragraph *) const;
649 // set it searching first for the right owner using the paragraph id
650 Paragraph * ownerParagraph(int id, Paragraph *) const;
654 /* returns a pointer to the row near the specified y-coordinate
655 * (relative to the whole text). y is set to the real beginning
658 Row * LyXText::getRowNearY(int & y) const
660 // If possible we should optimize this method. (Lgb)
661 Row * tmprow = firstrow;
664 while (tmprow->next() && tmpy + tmprow->height() <= y) {
665 tmpy += tmprow->height();
666 tmprow = tmprow->next();
669 y = tmpy; // return the real y