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 "CursorSlice.h"
31 DocIterator doc_iterator_begin(Buffer const * buf, Inset const * inset = 0);
32 DocIterator doc_iterator_end(Buffer const * buf, Inset const * inset = 0);
38 /// type for cell number in inset
39 typedef CursorSlice::idx_type idx_type;
40 /// type for row indices
41 typedef CursorSlice::row_type row_type;
42 /// type for col indices
43 typedef CursorSlice::col_type col_type;
49 explicit DocIterator(Buffer *buf);
51 /// access to owning buffer
52 Buffer * buffer() const { return buffer_; }
53 /// access to owning buffer
54 void setBuffer(Buffer * buf) { buffer_ = buf; }
56 /// Clone this for given \p buffer.
57 /// \p buffer must be a clone of buffer_.
58 DocIterator clone(Buffer * buffer) const;
60 /// access slice at position \p i
61 CursorSlice const & operator[](size_t i) const { return slices_[i]; }
62 /// access slice at position \p i
63 CursorSlice & operator[](size_t i) { return slices_[i]; }
64 /// chop a few slices from the iterator
65 void resize(size_t i) { slices_.resize(i); }
67 /// is the iterator valid?
68 explicit operator bool() const { return !empty(); }
70 /// does this iterator have any content?
71 bool empty() const { return slices_.empty(); }
72 /// is this the end position?
73 bool atEnd() const { return slices_.empty(); }
74 /// is this the last possible position?
75 bool atLastPos() const { return pit() == lastpit() && pos() == lastpos(); }
77 /// checks the cursor slices for disabled spell checker insets
78 bool allowSpellCheck() const;
81 // access to slice at tip
84 CursorSlice & top() { return slices_.back(); }
86 CursorSlice const & top() const { return slices_.back(); }
87 /// access to outermost slice
88 CursorSlice & bottom() { return slices_.front(); }
89 /// access to outermost slice
90 CursorSlice const & bottom() const { return slices_.front(); }
91 /// how many nested insets do we have?
92 size_t depth() const { return slices_.size(); }
93 /// the containing inset
94 Inset & inset() const { return top().inset(); }
95 /// return the cell of the inset this cursor is in
96 idx_type idx() const { return top().idx(); }
97 /// return the cell of the inset this cursor is in
98 idx_type & idx() { return top().idx(); }
99 /// return the last possible cell in this inset
100 idx_type lastidx() const;
101 /// return the paragraph this cursor is in
102 pit_type pit() const { return top().pit(); }
103 /// return the paragraph this cursor is in
104 pit_type & pit() { return top().pit(); }
105 /// return the last possible paragraph in this inset
106 pit_type lastpit() const;
107 /// return the position within the paragraph
108 pos_type pos() const { return top().pos(); }
109 /// return the position within the paragraph
110 pos_type & pos() { return top().pos(); }
111 /// return the last position within the paragraph
112 pos_type lastpos() const;
114 /// return the number of embedded cells
115 size_t nargs() const;
116 /// return the number of embedded cells
117 size_t ncols() const;
118 /// return the number of embedded cells
119 size_t nrows() const;
120 /// return the grid row of the top cell
121 row_type row() const;
122 /// return the last row of the top grid
123 row_type lastrow() const { return nrows() - 1; }
124 /// return the grid column of the top cell
125 col_type col() const;
126 /// return the last column of the top grid
127 col_type lastcol() const { return ncols() - 1; }
128 /// the inset just behind the cursor
129 Inset * nextInset() const;
130 /// the inset just in front of the cursor
131 Inset * prevInset() const;
133 bool boundary() const { return boundary_; }
135 void boundary(bool b) { boundary_ = b; }
137 // the two methods below have been inlined out because of
138 // profiling results under linux when opening a document.
139 /// are we in mathed?.
140 bool inMathed() const
141 { return !empty() && inset().inMathed(); }
142 /// are we in texted?.
143 bool inTexted() const
144 { return !empty() && !inset().inMathed(); }
145 /// are we in regexp-mode ?
146 bool inRegexped() const;
149 // math-specific part
151 /// return the mathed cell this cursor is in
152 MathData & cell() const;
154 InsetMath & nextMath();
156 InsetMath & prevMath();
157 /// the mathatom left of the cursor
158 MathAtom & prevAtom() const;
159 /// the mathatom right of the cursor
160 MathAtom & nextAtom() const;
162 // text-specific part
164 /// the paragraph we're in in text mode.
165 /// \warning only works within text!
166 Paragraph & paragraph() const;
167 /// the paragraph we're in in any case.
168 /// This method will give the containing paragraph even
169 /// if not in text mode (ex: in mathed).
170 Paragraph & innerParagraph() const;
171 /// return the inner text slice.
172 CursorSlice const & innerTextSlice() const;
173 // convert a DocIterator into an argument to LFUN_PARAGRAPH_GOTO
174 docstring paragraphGotoArgument() const;
175 /// returns a DocIterator for the containing text inset
176 DocIterator getInnerText() const;
177 /// the first and last positions of a word at top cursor slice
178 /// \warning only works within text!
179 FontSpan locateWord(word_location const loc) const;
182 /// the containing inset or the cell, respectively
183 Inset * realInset() const;
185 Inset * innerInsetOfType(int code) const;
187 Text * innerText() const;
192 /// move one step backwards
194 /// move one step forward
197 * move on one logical position, descend into nested insets
198 * including collapsed insets
202 * move on one logical position, descend into nested insets
203 * skip collapsed insets
205 void forwardPosIgnoreCollapsed();
206 /// move on one physical character or inset
208 /// move on one paragraph
210 /// move on one inset
212 /// move backward one logical position
214 /// move backward one physical character or inset
216 /// move backward one paragraph
218 /// move backward one inset
219 /// not used currently, uncomment if you need it
220 //void backwardInset();
222 /// are we some 'extension' (i.e. deeper nested) of the given iterator
223 bool hasPart(DocIterator const & it) const;
226 friend std::ostream &
227 operator<<(std::ostream & os, DocIterator const & cur);
228 friend LyXErr & operator<<(LyXErr & os, DocIterator const & it);
230 friend bool operator==(DocIterator const &, DocIterator const &);
231 friend bool operator<(DocIterator const &, DocIterator const &);
232 friend bool operator>(DocIterator const &, DocIterator const &);
233 friend bool operator<=(DocIterator const &, DocIterator const &);
235 friend class StableDocIterator;
238 void clear() { slices_.clear(); }
240 void push_back(CursorSlice const & sl) { slices_.push_back(sl); }
242 void pop_back() { slices_.pop_back(); }
243 /// recompute the inset parts of the cursor from the document data
244 void updateInsets(Inset * inset);
245 /// fix DocIterator in circumstances that should never happen.
246 /// \return true if the DocIterator was fixed.
248 /// Repopulate the slices insets from bottom to top. Useful
249 /// for stable iterators or Undo data.
252 /// find index of CursorSlice with &cell() == &cell (or -1 if not found)
253 int find(MathData const & cell) const;
254 /// find index of CursorSlice with inset() == inset (or -1 of not found)
255 int find(Inset const * inset) const;
256 /// cut off CursorSlices with index > above and store cut off slices in cut.
257 void cutOff(int above, std::vector<CursorSlice> & cut);
258 /// cut off CursorSlices with index > above
259 void cutOff(int above);
260 /// push CursorSlices on top
261 void append(std::vector<CursorSlice> const & x);
262 /// push one CursorSlice on top and set its index and position
263 void append(idx_type idx, pos_type pos);
266 docstring getPossibleLabel() const;
269 Encoding const * getEncoding() const;
271 friend class InsetIterator;
272 friend DocIterator doc_iterator_begin(Buffer const * buf, Inset const * inset);
273 friend DocIterator doc_iterator_end(Buffer const * buf, Inset const * inset);
275 explicit DocIterator(Buffer * buf, Inset * inset);
277 * Normally, when the cursor is at position i, it is painted *before*
278 * the character at position i. However, what if we want the cursor
279 * painted *after* position i? That's what boundary_ is for: if
280 * boundary_==true, the cursor is painted *after* position i-1, instead
281 * of before position i.
283 * Note 1: Usually, after i-1 or before i are actually the same place!
284 * However, this is not the case when i-1 and i are not painted
285 * contiguously, and in these cases we sometimes do want to have control
286 * over whether to paint before i or after i-1.
287 * Some concrete examples of where this happens:
288 * a. i-1 at the end of one row, i at the beginning of next row
289 * b. in bidi text, at transitions between RTL and LTR or vice versa
291 * Note 2: Why i and i-1? Why, if boundary_==false means: *before* i,
292 * couldn't boundary_==true mean: *after* i?
293 * Well, the reason is this: cursor position is not used only for
294 * painting the cursor, but it also affects other things, for example:
295 * where the next insertion will be placed (it is inserted at the current
296 * position, pushing anything at the current position and beyond forward).
297 * Now, when the current position is i and boundary_==true, insertion would
298 * happen *before* i. If the cursor, however, were painted *after* i, that
299 * would be very unnatural...
303 std::vector<CursorSlice> const & internalData() const { return slices_; }
305 std::vector<CursorSlice> slices_;
313 inline bool operator==(DocIterator const & di1, DocIterator const & di2)
315 return di1.slices_ == di2.slices_;
319 inline bool operator!=(DocIterator const & di1, DocIterator const & di2)
321 return !(di1 == di2);
326 bool operator<(DocIterator const & p, DocIterator const & q)
328 size_t depth = std::min(p.depth(), q.depth());
329 for (size_t i = 0 ; i < depth ; ++i) {
333 return p.depth() < q.depth();
338 bool operator>(DocIterator const & p, DocIterator const & q)
345 bool operator<=(DocIterator const & p, DocIterator const & q)
352 bool operator>=(DocIterator const & p, DocIterator const & q)
358 // The difference to a ('non stable') DocIterator is the removed
359 // (overwritten by 0...) part of the CursorSlice data items. So this thing
360 // is suitable for external storage, but not for iteration as such.
362 class StableDocIterator
366 StableDocIterator() {}
367 /// non-explicit intended
368 StableDocIterator(const DocIterator & it);
370 DocIterator asDocIterator(Buffer * buf) const;
372 size_t size() const { return data_.size(); }
373 /// return the position within the paragraph
374 pos_type pos() const { return data_.back().pos(); }
375 /// return the position within the paragraph
376 pos_type & pos() { return data_.back().pos(); }
378 friend std::ostream &
379 operator<<(std::ostream & os, StableDocIterator const & cur);
381 friend std::istream &
382 operator>>(std::istream & is, StableDocIterator & cur);
385 operator==(StableDocIterator const &, StableDocIterator const &);
387 std::vector<CursorSlice> data_;
392 #endif // DOCITERATOR_H