4 * This file is part of LyX, the document processor.
5 * Licence details can be found in the file COPYING.
9 * Full author contact details are available in file CREDITS.
15 #include "DispatchResult.h"
16 #include "DocIterator.h"
20 #include "mathed/MathParser_flags.h"
34 class InsetMathUnknown;
38 /// The cursor class describes the position of a cursor within a document.
39 class Cursor : public DocIterator
42 /// create the cursor of a BufferView
43 explicit Cursor(BufferView & bv);
45 /// returns true if we made a decision
46 bool getStatus(FuncRequest const & cmd, FuncStatus & flag) const;
47 /// dispatch from innermost inset upwards
48 void dispatch(FuncRequest const & cmd);
49 /// get the resut of the last dispatch
50 DispatchResult const & result() const;
51 /// add a new cursor slice
52 void push(Inset & inset);
53 /// add a new cursor slice, place cursor at front (move backwards)
54 void pushBackward(Inset & inset);
55 /// pop one level off the cursor
57 /// pop one slice off the cursor stack and go backwards
59 /// pop one slice off the cursor stack and go forward
61 /// make sure we are outside of given inset
62 void leaveInset(Inset const & inset);
64 void setCursor(DocIterator const & it);
65 /// sets the cursor to the normalized selection anchor
66 void setCursorToAnchor();
69 void setCurrentFont();
75 bool selection() const { return selection_; }
77 void setSelection(bool sel) { selection_ = sel; }
78 /// do we have a multicell selection?
79 bool selIsMultiCell() const
80 { return selection_ && selBegin().idx() != selEnd().idx(); }
81 /// do we have a multiline selection?
82 bool selIsMultiLine() const
83 { return selection_ && selBegin().pit() != selEnd().pit(); }
85 void setWordSelection(bool set) { word_selection_ = set; }
87 bool wordSelection() { return word_selection_; }
88 /// did we place the anchor?
89 bool mark() const { return mark_; }
90 /// did we place the anchor?
91 void setMark(bool mark) { mark_ = mark; }
94 /// set selection at given position
95 void setSelection(DocIterator const & where, int n);
97 void clearSelection();
98 /// access start of selection
99 CursorSlice selBegin() const;
100 /// access end of selection
101 CursorSlice selEnd() const;
102 /// access start of selection
103 DocIterator selectionBegin() const;
104 /// access start of selection
105 DocIterator selectionEnd() const;
107 * Update the selection status and save permanent
108 * selection if needed.
109 * @param selecting the new selection status
110 * @return whether the selection status has changed
112 bool selHandle(bool selecting);
114 docstring selectionAsString(bool with_label) const;
116 docstring currentState() const;
118 /// auto-correct mode
119 bool autocorrect() const { return autocorrect_; }
120 /// auto-correct mode
121 bool & autocorrect() { return autocorrect_; }
122 /// are we entering a macro name?
123 bool macromode() const { return macromode_; }
124 /// are we entering a macro name?
125 bool & macromode() { return macromode_; }
126 /// returns x,y position
127 void getPos(int & x, int & y) const;
128 /// return logical positions between which the cursor is situated
130 * If the cursor is at the edge of a row, the position which is "over the
131 * edge" will be returned as -1.
133 void getSurroundingPos(pos_type & left_pos, pos_type & right_pos);
134 /// the row in the paragraph we're in
135 Row const & textRow() const;
140 /// move one step backwards
142 /// move one step forward
144 /// move visually one step to the right
146 * @note: This method may move into an inset unless skip_inset == true.
147 * @note: This method may move into a new paragraph.
148 * @note: This method may move out of the current slice.
149 * @return: true if moved, false if not moved
151 bool posVisRight(bool skip_inset = false);
152 /// move visually one step to the left
154 * @note: This method may move into an inset unless skip_inset == true.
155 * @note: This method may move into a new paragraph.
156 * @note: This method may move out of the current slice.
157 * @return: true if moved, false if not moved
159 bool posVisLeft(bool skip_inset = false);
160 /// move visually to next/previous row
162 * Assuming we were to keep moving left (right) from the current cursor
163 * position, place the cursor at the rightmost (leftmost) edge of the
164 * new row to which we would move according to visual-mode cursor movement.
165 * This could be either the next or the previous row, depending on the
166 * direction in which we're moving, and whether we're in an LTR or RTL
168 * @note: The new position may even be in a new paragraph.
169 * @note: This method will not move out of the current slice.
170 * @return: false if not moved (no more rows to move to in given direction)
171 * @return: true if moved
173 bool posVisToNewRow(bool movingLeft);
174 /// move to right or left extremity of the current row
175 void posVisToRowExtremity(bool left);
178 void insert(Inset *);
179 /// insert a single char
180 void insert(char_type c);
182 void insert(docstring const & str);
184 /// FIXME: rename to something sensible showing difference to x_target()
185 /// in pixels from left of screen, set to current position if unset
187 /// set the targetX to x
188 void setTargetX(int x);
189 /// return targetX or -1 if unset
190 int x_target() const;
191 /// set targetX to current position
193 /// clear targetX, i.e. set it to -1
195 /// set offset to actual position - targetX
196 void updateTextTargetOffset();
197 /// distance between actual and targeted position during last up/down in text
198 int textTargetOffset() const;
200 /// access to normalized selection anchor
201 CursorSlice normalAnchor() const;
202 // FIXME: this can't be a const & and a const function because
203 // LFUN_TAB_* wants to move the real anchor.
204 /// access to real selection anchor
205 DocIterator & realAnchor();
206 /// sets anchor to cursor position
208 /// access to owning BufferView
209 BufferView & bv() const;
210 /// get some interesting description of top position
211 void info(odocstream & os) const;
212 /// are we in math mode (2), text mode (1) or unsure (0)?
214 /// reset cursor bottom to the beginning of the top inset
215 // (sort of 'chroot' environment...)
217 /// for spellchecking
218 void replaceWord(std::string const & replacestring);
220 * the event was not (yet) dispatched.
222 * Should only be called by an inset's doDispatch() method. It means:
223 * I, the doDispatch() method of InsetFoo, hereby declare that I am
224 * not able to handle that request and trust my parent will do the
225 * Right Thing (even if my getStatus partner said that I can do it).
226 * It is sort of a kludge that should be used only rarely...
228 void undispatched() const;
229 /// the event was already dispatched
230 void dispatched() const;
231 /// Set which screen update should be done
232 void screenUpdateFlags(Update::flags f) const;
233 /// Forces an updateBuffer() call
234 void forceBufferUpdate() const;
235 /// Removes any pending updateBuffer() call
236 void clearBufferUpdate() const;
237 /// Do we need to call updateBuffer()?
238 bool needBufferUpdate() const;
240 * don't call update() when done
242 * Should only be called by an inset's doDispatch() method. It means:
243 * I handled that request and I can reassure you that the screen does
244 * not need to be re-drawn and all entries in the coord cache stay
245 * valid (and there are no other things to put in the coord cache).
246 * This is a fairly rare event as well and only some optimization.
247 * Not using noScreenUpdate() should never be wrong.
249 void noScreenUpdate() const;
251 Update::flags screenUpdate() const { return disp_.screenUpdate(); }
252 /// fix cursor in circumstances that should never happen.
253 /// \retval true if a fix occured.
257 friend std::ostream & operator<<(std::ostream & os, Cursor const & cur);
258 friend LyXErr & operator<<(LyXErr & os, Cursor const & cur);
265 /// makes sure the next operation will be stored
266 void finishUndo() const;
268 /// open a new group of undo operations. Groups can be nested.
269 void beginUndoGroup() const;
271 /// end the current undo group
272 void endUndoGroup() const;
274 /// The general case: prepare undo for an arbitrary range.
275 void recordUndo(UndoKind kind, pit_type from, pit_type to) const;
277 /// Convenience: prepare undo for the range between 'from' and cursor.
278 void recordUndo(UndoKind kind, pit_type from) const;
280 /// Convenience: prepare undo for the single paragraph or cell
281 /// containing the cursor
282 void recordUndo(UndoKind kind = ATOMIC_UNDO) const;
284 /// Convenience: prepare undo for the inset containing the cursor
285 void recordUndoInset(UndoKind kind = ATOMIC_UNDO,
286 Inset const * inset = 0) const;
288 /// Convenience: prepare undo for the whole buffer
289 void recordUndoFullDocument() const;
291 /// Convenience: prepare undo for the selected paragraphs or cells
292 void recordUndoSelection() const;
295 void checkBufferStructure();
297 /// hook for text input to maintain the "new born word"
298 void markNewWordPosition();
300 /// The position of the new born word
301 /// As the user is entering a word without leaving it
302 /// the result is not empty. When not in text mode
303 /// and after leaving the word the result is empty.
304 DocIterator newWord() const { return new_word_; }
310 DocIterator const & beforeDispatchCursor() const { return beforeDispatchCursor_; }
312 void saveBeforeDispatchPosXY();
315 /// validate the "new born word" position
316 void checkNewWordPosition();
317 /// clear the "new born word" position
318 void clearNewWordPosition();
323 /// the anchor position
325 /// the start of the new born word
326 DocIterator new_word_;
328 mutable DispatchResult disp_;
330 * The target x position of the cursor. This is used for when
331 * we have text like :
333 * blah blah blah blah| blah blah blah
335 * blah blah blah blah blah blah
337 * When we move onto row 3, we would like to be vertically aligned
338 * with where we were in row 1, despite the fact that row 2 is
342 /// if a x_target cannot be hit exactly in a text, put the difference here
343 int textTargetOffset_;
344 /// do we have a selection?
346 /// are we on the way to get one?
348 /// are we in word-selection mode? This is set when double clicking.
349 bool word_selection_;
350 /// If true, we are behind the previous char, otherwise we are in front
351 // of the next char. This only make a difference when we are in front
352 // of a big inset spanning a whole row and computing coordinates for
353 // displaying the cursor.
355 /// position before dispatch started
356 DocIterator beforeDispatchCursor_;
357 /// cursor screen coordinates before dispatch started
358 int beforeDispatchPosX_;
359 int beforeDispatchPosY_;
362 // FIXME: make them private.
364 /// the current font settings
367 Font real_current_font;
372 // math specific stuff that could be promoted to "global" later
374 /// do we allow autocorrection
376 /// are we entering a macro name?
380 ///////////////////////////////////////////////////////////////////
382 // The part below is the non-integrated rest of the original math
383 // cursor. This should be either generalized for texted or moved
384 // back to the math insets.
386 ///////////////////////////////////////////////////////////////////
390 void insert(MathAtom const &);
392 void insert(MathData const &);
393 /// return false for empty math insets
395 /// return false for empty math insets
397 /// move the cursor up by sending an internal LFUN_UP
398 /// return true if fullscreen update is needed
400 /// move the cursor up by sending an internal LFUN_DOWN,
401 /// return true if fullscreen update is needed
403 /// whether the cursor is either at the first or last row
404 bool atFirstOrLastRow(bool up);
405 /// move up/down in a text inset, called for LFUN_UP/DOWN,
406 /// return true if successful, updateNeeded set to true if fullscreen
407 /// update is needed, otherwise it's not touched
408 bool upDownInText(bool up, bool & updateNeeded);
409 /// move up/down in math or any non text inset, call for LFUN_UP/DOWN
410 /// return true if successful
411 bool upDownInMath(bool up);
415 void plainInsert(MathAtom const & at);
417 void niceInsert(MathAtom const & at);
418 /// return the number of inserted array items
419 int niceInsert(docstring const & str, Parse::flags f = Parse::NORMAL,
422 /// in pixels from top of screen
423 void setScreenPos(int x, int y);
424 /// current offset in the top cell
426 /// interpret name a name of a macro. Returns true if
427 /// something got inserted.
428 bool macroModeClose();
429 /// are we currently typing the name of a macro?
430 bool inMacroMode() const;
431 /// get access to the macro we are currently typing
432 InsetMathUnknown * activeMacro();
433 /// get access to the macro we are currently typing
434 InsetMathUnknown const * activeMacro() const;
436 /// replace selected stuff with at, placing the former
437 // selection in given cell of atom
438 void handleNest(MathAtom const & at, int cell = 0);
440 bool isInside(Inset const *) const;
442 /// make sure cursor position is valid
443 /// FIXME: It does a subset of fixIfBroken. Maybe merge them?
445 /// mark current cursor trace for redraw
448 /// hack for reveal codes
451 /// injects content of a cell into parent
453 /// split font inset etc
454 void handleFont(std::string const & font);
456 /// display a message
457 void message(docstring const & msg) const;
458 /// display an error message
459 void errorMessage(docstring const & msg) const;
461 docstring getPossibleLabel() const;
463 /// the name of the macro we are currently inputting
464 docstring macroName();
465 /// where in the curent cell does the macro name start?
467 /// can we enter the inset?
468 bool openable(MathAtom const &) const;
470 Encoding const * getEncoding() const;
471 /// font at cursor position
472 Font getFont() const;
477 * Notifies all insets which appear in old, but not in cur. And then
478 * notify all insets which appear in cur, but not in old.
479 * Make sure that the cursor old is valid, i.e. all inset pointers
480 * point to valid insets! Use Cursor::fixIfBroken if necessary.
482 bool notifyCursorLeavesOrEnters(Cursor const & old, Cursor & cur);
487 #endif // LYXLCURSOR_H