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"
23 #include "insets/inset.h"
37 This class holds the mapping between buffer paragraphs and screen rows.
41 /// a position in the text
42 typedef lyx::pos_type pos_type;
44 typedef lyx::layout_type layout_type;
52 NEED_VERY_LITTLE_REFRESH = 2,
58 // the word around the cursor, only if the cursor is
61 // the word around the cursor
63 /// the word begining from the cursor position
65 /// the word around the cursor or before the cursor
67 /// the next word (not yet used)
72 LyXText(BufferView *);
79 void init(BufferView *, bool reinit = false);
81 mutable int number_of_rows;
85 mutable unsigned int width;
86 /// the current font settings
87 mutable LyXFont current_font;
89 mutable LyXFont real_current_font;
90 /// first visible pixel-row is set from LyXScreen!!!
91 // unsigned is wrong here for text-insets!
94 BufferView * bv_owner;
96 InsetText * inset_owner;
98 UpdatableInset * the_locking_inset;
101 int getRealCursorX(BufferView *) const;
103 LyXFont const getFont(Buffer const *, Paragraph * par, pos_type pos) const;
105 LyXFont const getLayoutFont(Buffer const *, Paragraph * par) const;
107 LyXFont const getLabelFont(Buffer const *, Paragraph * par) const;
109 void setCharFont(Buffer const *, Paragraph * par,
110 pos_type pos, LyXFont const & font);
111 void setCharFont(BufferView *, Paragraph * par,
112 pos_type pos, LyXFont const & font, bool toggleall);
113 /// returns a pointer to the very first Paragraph
114 Paragraph * firstParagraph() const;
116 /// what you expect when pressing <enter> at cursor position
117 void breakParagraph(BufferView *, char keep_layout = 0);
119 /** set layout over selection and make a total rebreak of
122 Paragraph * setLayout(BufferView *, LyXCursor & actual_cursor,
123 LyXCursor & selection_start,
124 LyXCursor & selection_end,
127 void setLayout(BufferView *, layout_type layout);
129 /// used in setlayout
130 void makeFontEntriesLayoutSpecific(Buffer const *, Paragraph * par);
132 /** increment depth over selection and make a total rebreak of those
135 void incDepth(BufferView *);
137 /** decrement depth over selection and make a total rebreak of those
139 void decDepth(BufferView *);
141 /** Get the depth at current cursor position
143 int getDepth() const;
145 /** set font over selection and make a total rebreak of those
147 toggleall defaults to false.
149 void setFont(BufferView *, LyXFont const &, bool toggleall = false);
151 /** deletes and inserts again all paragaphs between the cursor
152 and the specified par. The Cursor is needed to set the refreshing
154 This function is needed after SetLayout and SetFont etc.
156 void redoParagraphs(BufferView *, LyXCursor const & cursor,
157 Paragraph const * end_par) const;
159 void redoParagraph(BufferView *) const;
162 void toggleFree(BufferView *, LyXFont const &, bool toggleall = false);
165 string getStringToIndex(BufferView *);
167 /** recalculates the heights of all previous rows of the
168 specified paragraph. needed, if the last characters font
171 void redoHeightOfParagraph(BufferView *, LyXCursor const & cursor);
173 /** forces the redrawing of a paragraph. Needed when manipulating a
176 void redoDrawingOfParagraph(BufferView *, LyXCursor const & cursor);
178 /** insert a character, moves all the following breaks in the
179 same Paragraph one to the right and make a little rebreak
181 void insertChar(BufferView *, char c);
183 void insertInset(BufferView *, Inset * inset);
185 /** Completes the insertion with a full rebreak.
186 Returns true if something was broken. */
187 bool fullRebreak(BufferView *);
190 mutable Row * need_break_row;
192 mutable int refresh_y;
200 mutable Row * refresh_row;
202 pos_type refresh_pos;
204 /// give and set the LyXText status
205 text_status status() const;
207 void status(BufferView *, text_status) const;
210 /** wether the screen needs a refresh,
211 starting with refresh_y
213 mutable text_status status_;
216 /** returns a pointer to the row near the specified y-coordinate
217 (relative to the whole text). y is set to the real beginning
220 Row * getRowNearY(int & y) const;
222 /** returns the column near the specified x-coordinate of the row
223 x is set to the real beginning of this column
225 pos_type getColumnNearX(BufferView *, Row * row,
226 int & x, bool & boundary) const;
228 /** returns a pointer to a specified row. y is set to the beginning
231 Row * getRow(Paragraph * par,
232 pos_type pos, int & y) const;
234 /** returns the height of a default row, needed for scrollbar
236 int defaultHeight() const;
239 Later this variable has to be removed. There should be now internal
240 cursor in a text (and thus not in a buffer). By keeping this it is
241 (I think) impossible to have several views with the same buffer, but
242 the cursor placed at different places.
244 Since the LyXText now has been moved from Buffer to BufferView
245 it should not be absolutely needed to move the cursor...
247 mutable LyXCursor cursor; // actual cursor position
249 /** The structure that keeps track of the selections set. */
252 : set_(false), mark_(false)
266 LyXCursor cursor; // temporary cursor to hold a cursor position
267 // until setSelection is called!
268 LyXCursor start; // start of a REAL selection
269 LyXCursor end; // end of a REAL selection
271 bool set_; // former selection
272 bool mark_; // former mark_set
275 mutable Selection selection;
277 /// needed for the toggling (cursor position on last selection made)
278 mutable LyXCursor last_sel_cursor;
279 /// needed for toggling the selection in screen.C
280 mutable LyXCursor toggle_cursor;
281 /// needed for toggling the selection in screen.C
282 mutable LyXCursor toggle_end_cursor;
284 /// need the selection cursor:
285 void setSelection(BufferView *);
287 void clearSelection() const;
289 string const selectionAsString(Buffer const *, bool label) const;
291 /// select the word we need depending on word_location
292 void getWord(LyXCursor & from, LyXCursor & to,
293 word_location const) const;
294 /// just selects the word the cursor is in
295 void selectWord(BufferView *, word_location const);
296 /// returns the inset at cursor (if it exists), 0 otherwise
297 Inset * getInset() const;
299 /** 'selects" the next word, where the cursor is not in
300 and returns this word as string. THe cursor will be moved
301 to the beginning of this word.
302 With SelectSelectedWord can this be highlighted really
304 string const selectNextWordToSpellcheck(BufferView *, float & value) const;
306 void selectSelectedWord(BufferView *);
308 void setCursor(BufferView *, Paragraph * par,
311 bool boundary = false) const;
313 void setCursor(BufferView *, LyXCursor &, Paragraph * par,
315 bool boundary = false) const;
317 void setCursorIntern(BufferView *, Paragraph * par,
320 bool boundary = false) const;
322 void setCurrentFont(BufferView *) const;
325 bool isBoundary(Buffer const *, Paragraph * par,
328 bool isBoundary(Buffer const *, Paragraph * par,
330 LyXFont const & font) const;
333 void setCursorFromCoordinates(BufferView *, int x, int y) const;
335 void setCursorFromCoordinates(BufferView *, LyXCursor &,
338 void cursorUp(BufferView *) const;
340 void cursorDown(BufferView *) const;
342 void cursorLeft(BufferView *, bool internal = true) const;
344 void cursorRight(BufferView *, bool internal = true) const;
346 void cursorLeftOneWord(BufferView *) const;
348 void cursorLeftOneWord(LyXCursor &) const;
350 void cursorRightOneWord(BufferView *) const;
352 void cursorUpParagraph(BufferView *) const;
354 void cursorDownParagraph(BufferView *) const;
356 void cursorHome(BufferView *) const;
358 void cursorEnd(BufferView *) const;
360 void cursorTab(BufferView *) const;
362 void cursorTop(BufferView *) const;
364 void cursorBottom(BufferView *) const;
366 void Delete(BufferView *);
368 void backspace(BufferView *);
370 void deleteWordForward(BufferView *);
372 void deleteWordBackward(BufferView *);
374 void deleteLineForward(BufferView *);
376 bool selectWordWhenUnderCursor(BufferView *,
377 word_location const);
383 text_capitalization = 1,
387 /// Change the case of the word at cursor position.
388 void changeCase(BufferView *, TextCase action);
390 void changeRegionCase(BufferView * bview,
391 LyXCursor const & from,
392 LyXCursor const & to,
393 LyXText::TextCase action);
395 void transposeChars(BufferView &);
397 /** returns a printed row in a pixmap. The y value is needed to
398 decide, wether it is selected text or not. This is a strange
401 void getVisibleRow(BufferView *, int y_offset, int x_offset,
402 Row * row_ptr, int y, bool cleared=false);
405 void toggleInset(BufferView *);
407 void cutSelection(BufferView *, bool doclear = true, bool realcut = true);
409 void copySelection(BufferView *);
411 void pasteSelection(BufferView *);
413 void copyEnvironmentType();
415 void pasteEnvironmentType(BufferView *);
417 /** the DTP switches for paragraphs. LyX will store the top settings
418 always in the first physical paragraph, the bottom settings in the
419 last. When a paragraph is broken, the top settings rest, the bottom
420 settings are given to the new one. So I can make shure, they do not
421 duplicate themself (and you cannnot make dirty things with them! )
423 void setParagraph(BufferView *,
424 bool line_top, bool line_bottom,
425 bool pagebreak_top, bool pagebreak_bottom,
426 VSpace const & space_top,
427 VSpace const & space_bottom,
428 Spacing const & spacing,
430 string labelwidthstring,
433 /* these things are for search and replace */
435 /** sets the selection over the number of characters of string,
438 void setSelectionOverString(BufferView *, string const & str);
440 /** simple replacing. The font of the first selected character
443 void replaceSelectionWithString(BufferView *, string const & str);
445 /// needed to insert the selection
446 void insertStringAsLines(BufferView *, string const & str);
447 /// needed to insert the selection
448 void insertStringAsParagraphs(BufferView *, string const & str);
450 /// Find next inset of some specified type.
451 bool gotoNextInset(BufferView *, std::vector<Inset::Code> const & codes,
452 string const & contents = string()) const;
455 /* for the greater insets */
457 /// returns false if inset wasn't found
458 bool updateInset(BufferView *, Inset *);
460 void checkParagraph(BufferView *, Paragraph * par, pos_type pos);
462 int numberOfCell(Paragraph * par, pos_type pos) const;
464 void removeTableRow(LyXCursor & cursor) const;
466 bool isEmptyTableCell() const;
468 void toggleAppendix(BufferView *);
470 int workWidth(BufferView *) const;
472 int workWidth(BufferView *, Inset * inset) const;
474 void computeBidiTables(Buffer const *, Row * row) const;
476 /// Maps positions in the visual string to positions in logical string.
478 pos_type log2vis(pos_type pos) const {
479 if (bidi_start == -1)
482 return log2vis_list[pos-bidi_start];
485 /// Maps positions in the logical string to positions in visual string.
487 pos_type vis2log(pos_type pos) const {
488 if (bidi_start == -1)
491 return vis2log_list[pos-bidi_start];
495 pos_type bidi_level(pos_type pos) const {
496 if (bidi_start == -1)
499 return bidi_levels[pos-bidi_start];
503 bool bidi_InRange(pos_type pos) const {
504 return bidi_start == -1 ||
505 (bidi_start <= pos && pos <= bidi_end);
509 mutable Row * firstrow;
511 mutable Row * lastrow;
513 /** Copybuffer for copy environment type.
514 Asger has learned that this should be a buffer-property instead
515 Lgb has learned that 'char' is a lousy type for non-characters
517 layout_type copylayouttype;
519 /** inserts a new row behind the specified row, increments
520 the touched counters */
521 void insertRow(Row * row, Paragraph * par, pos_type pos) const;
522 /** removes the row and reset the touched counters */
523 void removeRow(Row * row) const;
525 /** remove all following rows of the paragraph of the specified row. */
526 void removeParagraph(Row * row) const;
528 /** insert the specified paragraph behind the specified row */
529 void insertParagraph(BufferView *,
530 Paragraph * par, Row * row) const;
532 /** appends the implizit specified paragraph behind the specified row,
533 * start at the implizit given position */
534 void appendParagraph(BufferView *, Row * row) const;
537 void breakAgain(BufferView *, Row * row) const;
539 void breakAgainOneRow(BufferView *, Row * row);
540 /// Calculate and set the height of the row
541 void setHeightOfRow(BufferView *, Row * row_ptr) const;
543 /** this calculates the specified parameters. needed when setting
544 * the cursor and when creating a visible row */
545 void prepareToPrint(BufferView *, Row * row, float & x,
546 float & fill_separator,
548 float & fill_label_hfill,
549 bool bidi = true) const;
551 /// A struct used for drawing routines
552 struct DrawRowParams {
557 // the painter to use
559 // has the background been cleared
569 /// the inset/view full width
575 /// fill separator size
579 /// paint the background
580 bool paintRowBackground(DrawRowParams & p);
582 /// paint the selection background
583 void paintRowSelection(DrawRowParams & p);
585 /// paint appendix marker
586 void paintRowAppendix(DrawRowParams & p);
588 /// paint env depth bar
589 void paintRowDepthBar(DrawRowParams & p);
591 /// paint a first row in a paragraph
592 void paintFirstRow(DrawRowParams & p);
594 /// paint a last row in a paragraph
595 void paintLastRow(DrawRowParams & p);
598 void paintRowText(DrawRowParams & p);
600 // fix the cursor `cur' after a characters has been deleted at `where'
601 // position. Called by deleteEmptyParagraphMechanism
602 void fixCursorAfterDelete(BufferView * bview,
604 LyXCursor const & where) const;
607 void deleteEmptyParagraphMechanism(BufferView *,
608 LyXCursor const & old_cursor) const;
611 /** Updates all counters starting BEHIND the row. Changed paragraphs
612 * with a dynamic left margin will be rebroken. */
613 void updateCounters(BufferView *, Row * row) const;
616 void setCounter(Buffer const *, Paragraph * par) const;
619 * some low level functions
623 int singleWidth(BufferView *, Paragraph * par, pos_type pos) const;
625 int singleWidth(BufferView *, Paragraph * par, pos_type pos, char c) const;
627 void draw(BufferView *, Row const * row,
628 pos_type & pos, int offset, float & x, bool cleared);
630 /// get the next breakpoint in a given paragraph
631 pos_type nextBreakPoint(BufferView *, Row const * row, int width) const;
632 /// returns the minimum space a row needs on the screen in pixel
633 int fill(BufferView *, Row * row, int workwidth) const;
635 /** returns the minimum space a manual label needs on the
637 int labelFill(BufferView *, Row const * row) const;
640 pos_type beginningOfMainBody(Buffer const *, Paragraph const * par) const;
642 /** Returns the left beginning of the text.
643 This information cannot be taken from the layouts-objekt, because
644 in LaTeX the beginning of the text fits in some cases
645 (for example sections) exactly the label-width.
647 int leftMargin(BufferView *, Row const * row) const;
649 int rightMargin(Buffer const *, Row const * row) const;
651 int labelEnd (BufferView *, Row const * row) const;
653 /** returns the number of separators in the specified row.
654 The separator on the very last column doesnt count
656 int numberOfSeparators(Buffer const *, Row const * row) const;
658 /** returns the number of hfills in the specified row. The
659 LyX-Hfill is a LaTeX \hfill so that the hfills at the
660 beginning and at the end were ignored. This is {\em MUCH}
661 more usefull than not to ignore!
663 int numberOfHfills(Buffer const *, Row const * row) const;
665 /// like NumberOfHfills, but only those in the manual label!
666 int numberOfLabelHfills(Buffer const *, Row const * row) const;
667 /** returns true, if a expansion is needed. Rules are given by
670 bool hfillExpansion(Buffer const *, Row const * row_ptr,
673 LColor::color backgroundColor();
677 mutable std::vector<pos_type> log2vis_list;
680 mutable std::vector<pos_type> vis2log_list;
683 mutable std::vector<pos_type> bidi_levels;
686 mutable pos_type bidi_start;
689 mutable pos_type bidi_end;
692 mutable bool bidi_same_direction;
695 unsigned char transformChar(unsigned char c, Paragraph * par,
698 /** returns the paragraph position of the last character in the
701 pos_type rowLast(Row const * row) const;
703 pos_type rowLastPrintable(Row const * row) const;
709 // special owner functions
711 Paragraph * ownerParagraph() const;
713 void ownerParagraph(Paragraph *) const;
714 // set it searching first for the right owner using the paragraph id
715 void ownerParagraph(int id, Paragraph *) const;