4 * This file is part of LyX, the document processor.
5 * Licence details can be found in the file COPYING.
7 * \author Matthias Ettrich
8 * \author Lars Gullik Bjønnes
10 * \author Guillaume Munch
12 * Full author contact details are available in file CREDITS.
15 /* Note about debugging options:
17 * When compiled in devel mode and run with the option -dbg latex, two ways
18 * of debugging TexRow are available:
20 * 1. The source view panel prepends the full TexRow information to the LaTeX
23 * 2. Clicking on any line in the source view moves the buffer to the location
24 * recognised by TexRow.
31 #include "support/debug.h"
32 #include "support/types.h"
45 /// types for cells and math insets
46 typedef void const * uid_type;
47 typedef size_t idx_type;
50 /// Represents the correspondence between paragraphs and the generated
55 /// an individual par id/pos <=> row mapping
56 struct TextEntry { int id; pos_type pos; };
58 /// an individual math id/cell <=> row mapping
59 struct MathEntry { uid_type id; idx_type cell; };
61 /// a container for passing entries around
63 bool is_math;// true iff the union is a math
65 struct TextEntry text;
66 struct MathEntry math;
71 /// id/pos correspondence for a single row
74 /// container of id/pos <=> row mapping
75 /// invariant: in any enabled_ TexRow, rowlist_ will contain at least one
76 /// Row (the current row)
77 typedef std::vector<RowEntryList> RowList;
81 RowEntryList & currentRow();
84 class RowListIterator;
86 RowListIterator begin() const;
88 RowListIterator end() const;
93 #if !(defined(__GNUC__) && (__GNUC__ == 4) && (__GNUC_MINOR__ == 6))
94 /// Copy can be expensive and is not usually useful for TexRow.
95 /// Force explicit copy, prefer move instead. This also prevents
96 /// move()s from being converted into copy silently.
97 explicit TexRow(TexRow const & other) = default;
98 TexRow(TexRow && other) = default;
99 TexRow & operator=(TexRow const & other) = default;
100 TexRow & operator=(TexRow && other) = default;
102 //for gcc 4.6, nothing to do: it's enough to disable implicit copy during
103 // dev with more recent versions of gcc.
106 /// Clears structure.
109 static const TextEntry text_none;
110 static const RowEntry row_none;
111 /// Returns true if RowEntry is devoid of information
112 static bool isNone(RowEntry entry);
113 /// Returns true if TextEntry is devoid of information
114 static bool isNone(TextEntry entry);
116 /// Converts a CursorSlice into a RowEntry
117 static RowEntry rowEntryFromCursorSlice(CursorSlice const & slice);
118 /// Encapsulates the paragraph and position for later use
119 static RowEntry textEntry(int id, pos_type pos);
120 /// Encapsulates a cell and position for later use
121 static RowEntry mathEntry(uid_type id, idx_type cell);
123 /// for debugging purposes
124 static docstring asString(RowEntry entry);
126 /// Defines the row information for the current line
127 /// returns true if this entry will appear on the current row
128 bool start(RowEntry entry);
129 /// Defines the paragraph and position for the current line
130 /// returns true if this entry will appear on the current row
131 bool start(int id, pos_type pos);
132 /// Defines a cell and position for the current line. Always appear in the
134 void startMath(uid_type id, idx_type cell);
135 /// Defines the paragraph for the current cell-like inset. Always appears
136 /// in the current row like a math cell, but is detached from the normal
137 /// text flow. Note: since the cell idx is not recorded it does not work as
138 /// well as for math grids; if we were to do that properly we would need to
139 /// access the id of the parent Tabular inset from the CursorSlice.
140 void forceStart(int id, pos_type pos);
142 /// Insert node when line is completed
144 /// Insert multiple nodes when zero or more lines are completed
145 void newlines(size_t num_lines);
148 * getEntriesFromRow - find pids and position for a given row
149 * @param row number to find
150 * @return a pair of TextEntry denoting the start and end of the position.
151 * The TextEntry values can be isNone(). If no row is found then the first
154 std::pair<TextEntry,TextEntry> getEntriesFromRow(int row) const;
157 * getDocIteratorFromEntries - find pids and positions for a given row
158 * @param buffer where to look
159 * @return a pair of DocIterators denoting the start and end of the
160 * position. The DocIterators can be invalid. The starting DocIterator
161 * being invalid means that no location was found. Note: there is no
162 * guarantee that the DocIterators are in the same inset or even at the
165 static std::pair<DocIterator, DocIterator> getDocIteratorsFromEntries(
170 // A FuncRequest to select from start to end
171 static FuncRequest goToFunc(TextEntry start, TextEntry end);
172 // A FuncRequest to select a row
173 FuncRequest goToFuncFromRow(int const row) const;
176 * getDocIteratorFromRow - find pids and positions for a given row
177 * @param row number to find
178 * @param buffer where to look
179 * @return a pair of DocIterators as above.
181 std::pair<DocIterator, DocIterator> getDocIteratorsFromRow(
183 Buffer const & buf) const;
185 /// Finds the best pair of rows for dit
186 /// returns (-1,-1) if not found.
187 std::pair<int,int> rowFromDocIterator(DocIterator const & dit) const;
189 /// Finds the best pair of rows for cursor, taking the selection into
191 /// returns (-1,-1) if not found.
192 std::pair<int,int> rowFromCursor(Cursor const & dit) const;
194 /// Returns the number of rows contained
196 /// Fill or trim to reach the row count \param r
197 void setRows(size_t r);
199 /// appends texrow. the final line of this is merged with the first line of
201 void append(TexRow texrow);
203 /// for debugging purpose
204 void prepend(docstring_list &) const;
207 /// true iff same paragraph or math inset
208 static bool sameParOrInsetMath(RowEntry entry1, RowEntry entry2);
209 /// computes the distance in pos or cell index
210 /// assumes it is the sameParOrInsetMath
211 static int comparePos(RowEntry entry1, RowEntry entry2);
216 /// TexString : dumb struct to pass around docstrings with TexRow information.
217 /// They are best created using otexstringstream.
218 /// They can be output to otexrowstreams and otexstreams.
219 /// A valid TexString has as many newlines in str as in texrow. Be careful not
220 /// to introduce a mismatch between the line and the row counts, as this will
221 /// assert in devel mode when outputting to a otexstream.
227 #if !(defined(__GNUC__) && (__GNUC__ == 4) && (__GNUC_MINOR__ == 6))
228 /// Copy can be expensive and is not usually useful for TexString.
229 /// Force explicit copy, prefer move instead. This also prevents
230 /// move()s from being converted into copy silently.
231 explicit TexString(TexString const &) = default;
232 TexString(TexString && other) = default;
233 TexString & operator=(TexString const & other) = default;
234 TexString & operator=(TexString && other) = default;
236 //for gcc 4.6, nothing to do: it's enough to disable implicit copy during
237 // dev with more recent versions of gcc.
240 TexString() = default;
241 /// Texstring containing str and TexRow with enough lines which are empty
242 explicit TexString(docstring str);
243 /// Texstring containing str and texrow. Must be valid.
244 TexString(docstring str, TexRow texrow);
245 /// Ensure that the string and the TexRow have as many newlines.
250 // Standard container needs a complete type
251 class TexRow::RowEntryList {
252 // For each row we store a list of one special TextEntry and several
253 // RowEntries. (The order is important.) We only want one text entry
254 // because we do not want to store every position in the lyx file. On the
255 // other hand we want to record all math and table cells positions for
256 // enough precision. Usually the count of cells is easier to handle.
257 // The RowEntries are used for forward-search and the code preview pane.
258 std::vector<RowEntry> v_;
259 // The TextEntry is currently used for reverse-search and the error
260 // reporting dialog. Once the latter are adapted to rely on the more precise
261 // RowEntries above, it can be removed.
262 TextEntry text_entry_;
265 typedef std::vector<RowEntry>::iterator iterator;
266 iterator begin() { return v_.begin(); }
267 iterator end() { return v_.end(); }
269 typedef std::vector<RowEntry>::const_iterator const_iterator;
270 const_iterator begin() const { return v_.cbegin(); }
271 const_iterator end() const { return v_.cend(); }
273 RowEntryList() : text_entry_(TexRow::text_none) {}
275 // returns true if the row entry will appear in the row entry list
276 bool addEntry(RowEntry entry);
278 // the row entry will appear in the row entry list, but it never counts
279 // as a proper text entry.
280 void forceAddEntry(RowEntry entry);
282 // returns the TextEntry or TexRow::text_none if none
283 TextEntry getTextEntry() const;
286 void append(RowEntryList row);
290 bool operator==(TexRow::RowEntry entry1, TexRow::RowEntry entry2);