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"
18 #include <algorithm> // std::min in MSVC 2017
31 DocIterator doc_iterator_begin(Buffer const * buf, Inset const * inset = nullptr);
32 DocIterator doc_iterator_end(Buffer const * buf, Inset const * inset = nullptr);
39 DocIterator() = default;
41 // We could be able to get rid of this if only every BufferView were
42 // associated to a buffer on construction.
43 explicit DocIterator(Buffer *buf)
47 /// access to owning buffer
48 Buffer * buffer() const { return buffer_; }
49 /// access to owning buffer
50 void setBuffer(Buffer * buf) { buffer_ = buf; }
52 /// Clone this for given \p buffer.
53 /// \p buffer must be a clone of buffer_.
54 DocIterator clone(Buffer * buffer) const;
56 /// access slice at position \p i
57 CursorSlice const & operator[](size_t i) const { return slices_[i]; }
58 /// access slice at position \p i
59 CursorSlice & operator[](size_t i) { return slices_[i]; }
60 /// chop a few slices from the iterator
61 void resize(size_t i) { slices_.resize(i); }
63 /// is the iterator valid?
64 explicit operator bool() const { return !empty(); }
66 /// does this iterator have any content?
67 bool empty() const { return slices_.empty(); }
68 /// is this the begin position?
69 bool atBegin() const { return depth() == 1 && pit() == 0 && pos() == 0; }
70 /// is this the end position?
71 bool atEnd() const { return slices_.empty(); }
73 /// checks the cursor slices for disabled spell checker insets
74 bool allowSpellCheck() const;
77 // access to slice at tip
80 CursorSlice & top() { return slices_.back(); }
82 CursorSlice const & top() const { return slices_.back(); }
83 /// access to outermost slice
84 CursorSlice & bottom() { return slices_.front(); }
85 /// access to outermost slice
86 CursorSlice const & bottom() const { return slices_.front(); }
87 /// how many nested insets do we have?
88 size_t depth() const { return slices_.size(); }
89 /// the containing inset
90 Inset & inset() const { return top().inset(); }
91 /// return the cell of the inset this cursor is in
92 idx_type idx() const { return top().idx(); }
93 /// return the cell of the inset this cursor is in
94 idx_type & idx() { return top().idx(); }
95 /// return the last possible cell in this inset
96 idx_type lastidx() const;
97 /// return the paragraph this cursor is in
98 pit_type pit() const { return top().pit(); }
99 /// return the paragraph this cursor is in
100 pit_type & pit() { return top().pit(); }
101 /// return the last possible paragraph in this inset
102 pit_type lastpit() const;
103 /// return the position within the paragraph
104 pos_type pos() const { return top().pos(); }
105 /// return the position within the paragraph
106 pos_type & pos() { return top().pos(); }
107 /// return the last position within the paragraph
108 pos_type lastpos() const;
110 /// return the number of embedded cells
111 size_t nargs() const;
112 /// return the number of embedded cells
113 size_t ncols() const;
114 /// return the number of embedded cells
115 size_t nrows() const;
116 /// return the grid row of the top cell
117 row_type row() const;
118 /// return the last row of the top grid
119 row_type lastrow() const { return nrows() - 1; }
120 /// return the grid column of the top cell
121 col_type col() const;
122 /// return the last column of the top grid
123 col_type lastcol() const { return ncols() - 1; }
124 /// the inset just behind the cursor
125 /// returns 0 if there is no inset (e.g. normal text)
126 Inset * nextInset() const;
127 /// the inset just in front of the cursor
128 Inset * prevInset() const;
130 bool boundary() const { return boundary_; }
132 void boundary(bool b) { boundary_ = b; }
134 // the two methods below have been inlined out because of
135 // profiling results under linux when opening a document.
136 /// are we in mathed?.
137 bool inMathed() const
138 { return !empty() && inset().inMathed(); }
139 /// are we in texted?.
140 bool inTexted() const
141 { return !empty() && !inset().inMathed(); }
142 /// are we in regexp-mode ?
143 bool inRegexped() const;
146 // math-specific part
148 /// return the mathed cell this cursor is in
149 MathData & cell() const;
151 InsetMath & nextMath();
153 InsetMath & prevMath();
154 /// the mathatom left of the cursor
155 MathAtom & prevAtom() const;
156 /// the mathatom right of the cursor
157 MathAtom & nextAtom() const;
159 // text-specific part
161 /// the paragraph we're in in text mode.
162 /// \warning only works within text!
163 Paragraph & paragraph() const;
164 /// the paragraph we're in in any case.
165 /// This method will give the containing paragraph even
166 /// if not in text mode (ex: in mathed).
167 Paragraph & innerParagraph() const;
168 /// return the inner text slice.
169 CursorSlice const & innerTextSlice() const;
170 // convert a DocIterator into an argument to LFUN_PARAGRAPH_GOTO
171 docstring paragraphGotoArgument() const;
172 /// returns a DocIterator for the containing text inset
173 DocIterator getInnerText() const;
174 /// the first and last positions of a word at top cursor slice
175 /// \warning only works within text!
176 FontSpan locateWord(word_location const loc) const;
179 /// the containing inset or the cell, respectively
180 Inset * realInset() const;
182 Inset * innerInsetOfType(int code) const;
184 Text * innerText() const;
189 /// move one step backwards
191 /// move one step forward
194 * move on one logical position, descend into nested insets
195 * including collapsed insets
199 * move on one logical position, descend into nested insets
200 * skip collapsed insets
202 void forwardPosIgnoreCollapsed();
203 /// move on one physical character or inset
205 /// move on one paragraph
207 /// move on to the next closest inset
209 /// move backward one logical position
211 /// move backward one logical position, skip collapsed insets
212 void backwardPosIgnoreCollapsed();
213 /// move backward one physical character or inset
215 /// move backward one paragraph
217 /// move backward one inset
218 void backwardInset();
220 /// are we some 'extension' (i.e. deeper nested) of the given iterator
221 bool hasPart(DocIterator const & it) const;
224 friend std::ostream &
225 operator<<(std::ostream & os, DocIterator const & cur);
226 friend LyXErr & operator<<(LyXErr & os, DocIterator const & it);
228 friend bool operator==(DocIterator const &, DocIterator const &);
229 friend bool operator<(DocIterator const &, DocIterator const &);
230 friend bool operator>(DocIterator const &, DocIterator const &);
231 friend bool operator<=(DocIterator const &, DocIterator const &);
233 friend class StableDocIterator;
236 void clear() { slices_.clear(); }
238 void push_back(CursorSlice const & sl) { slices_.push_back(sl); }
240 void pop_back() { slices_.pop_back(); }
241 /// recompute the inset parts of the cursor from the document data
242 void updateInsets(Inset * inset);
243 /// fix DocIterator in circumstances that should never happen.
244 /// \return true if the DocIterator was fixed.
246 /// Repopulate the slices insets from bottom to top. Useful
247 /// for stable iterators or Undo data.
250 bool isInside(Inset const *) const;
251 /// make sure we are outside of given inset
252 void leaveInset(Inset const & inset);
254 /// find index of CursorSlice with &cell() == &cell (or -1 if not found)
255 int find(MathData const & cell) const;
256 /// find index of CursorSlice with inset() == inset (or -1 of not found)
257 int find(Inset const * inset) const;
258 /// cut off CursorSlices with index > above and store cut off slices in cut.
259 void cutOff(int above, std::vector<CursorSlice> & cut);
260 /// cut off CursorSlices with index > above
261 void cutOff(int above);
262 /// push CursorSlices on top
263 void append(std::vector<CursorSlice> const & x);
264 /// push one CursorSlice on top and set its index and position
265 void append(idx_type idx, pos_type pos);
268 docstring getPossibleLabel() const;
271 Encoding const * getEncoding() const;
273 friend class InsetIterator;
274 friend DocIterator doc_iterator_begin(Buffer const * buf, Inset const * inset);
275 friend DocIterator doc_iterator_end(Buffer const * buf, Inset const * inset);
277 explicit DocIterator(Buffer * buf, Inset * inset)
278 : inset_(inset), buffer_(buf)
282 * Normally, when the cursor is at position i, it is painted *before*
283 * the character at position i. However, what if we want the cursor
284 * painted *after* position i? That's what boundary_ is for: if
285 * boundary_==true, the cursor is painted *after* position i-1, instead
286 * of before position i.
288 * Note 1: Usually, after i-1 or before i are actually the same place!
289 * However, this is not the case when i-1 and i are not painted
290 * contiguously, and in these cases we sometimes do want to have control
291 * over whether to paint before i or after i-1.
292 * Some concrete examples of where this happens:
293 * a. i-1 at the end of one row, i at the beginning of next row
294 * b. in bidi text, at transitions between RTL and LTR or vice versa
296 * Note 2: Why i and i-1? Why, if boundary_==false means: *before* i,
297 * couldn't boundary_==true mean: *after* i?
298 * Well, the reason is this: cursor position is not used only for
299 * painting the cursor, but it also affects other things, for example:
300 * where the next insertion will be placed (it is inserted at the current
301 * position, pushing anything at the current position and beyond forward).
302 * Now, when the current position is i and boundary_==true, insertion would
303 * happen *before* i. If the cursor, however, were painted *after* i, that
304 * would be very unnatural...
306 bool boundary_ = false;
308 std::vector<CursorSlice> const & internalData() const { return slices_; }
310 std::vector<CursorSlice> slices_;
312 Inset * inset_ = nullptr;
314 Buffer * buffer_ = nullptr;
318 inline bool operator==(DocIterator const & di1, DocIterator const & di2)
320 return di1.slices_ == di2.slices_;
324 inline bool operator!=(DocIterator const & di1, DocIterator const & di2)
326 return !(di1 == di2);
331 bool operator<(DocIterator const & p, DocIterator const & q)
333 size_t depth = std::min(p.depth(), q.depth());
334 for (size_t i = 0 ; i < depth ; ++i) {
338 return p.depth() < q.depth();
343 bool operator>(DocIterator const & p, DocIterator const & q)
350 bool operator<=(DocIterator const & p, DocIterator const & q)
357 bool operator>=(DocIterator const & p, DocIterator const & q)
363 // The difference to a ('non stable') DocIterator is the removed
364 // (overwritten by 0...) part of the CursorSlice data items. So this thing
365 // is suitable for external storage, but not for iteration as such.
367 class StableDocIterator
371 StableDocIterator() {}
372 /// non-explicit intended
373 StableDocIterator(const DocIterator & it);
375 DocIterator asDocIterator(Buffer * buf) const;
377 size_t size() const { return data_.size(); }
378 /// return the position within the paragraph
379 pos_type pos() const { return data_.back().pos(); }
380 /// return the position within the paragraph
381 pos_type & pos() { return data_.back().pos(); }
383 friend std::ostream &
384 operator<<(std::ostream & os, StableDocIterator const & cur);
386 friend std::istream &
387 operator>>(std::istream & is, StableDocIterator & cur);
390 operator==(StableDocIterator const &, StableDocIterator const &);
392 std::vector<CursorSlice> data_;
397 #endif // DOCITERATOR_H