4 * This file is part of LyX, the document processor.
5 * Licence details can be found in the file COPYING.
10 * Full author contact details are available in file CREDITS.
12 * Record changes in a paragraph.
18 #include "support/docstream.h"
19 #include "support/lyxtime.h"
26 /// the type of change
28 UNCHANGED, // no change
30 DELETED // deleted text
33 explicit Change(Type t, int a = 0, lyx::time_type ct = 0)
34 : type(t), author(a), changetime(ct) {}
40 lyx::time_type changetime;
43 bool operator==(Change const & l, Change const & r);
44 bool operator!=(Change const & l, Change const & r);
48 /// set the pos to the given change
49 void set(Change const & change, lyx::pos_type pos);
50 /// set the range to the given change
51 void set(Change const & change, lyx::pos_type start, lyx::pos_type end);
53 /// mark the given change and adjust
54 void record(Change const & change, lyx::pos_type pos);
56 /// return the change at the given position
57 Change const lookup(lyx::pos_type pos) const;
59 /// return true if there is a change in the given range
60 bool isChanged(lyx::pos_type start, lyx::pos_type end) const;
62 /// remove the given entry. This implies that a character was
63 /// deleted at pos, and will adjust all range bounds past it
64 void erase(lyx::pos_type pos);
66 /// output latex to mark a transition between two changetypes
67 /// returns length of text outputted
68 static int latexMarkChange(lyx::odocstream & os, Change::Type old,
69 Change::Type change, bool const & output);
71 /// output .lyx file format for transitions between changes
72 static void lyxMarkChange(std::ostream & os, int & column,
73 lyx::time_type curtime, Change const & old, Change const & change);
78 Range(lyx::pos_type s, lyx::pos_type e)
81 // does this range contain r ?
82 bool contains(Range const & r) const;
84 // does this range contain pos ?
85 bool contains(lyx::pos_type pos) const;
87 // do the ranges intersect ?
88 bool intersects(Range const & r) const;
91 lyx::pos_type end; // Caution: end is not in the range!
94 friend bool operator==(Range const & r1, Range const & r2);
95 friend bool operator!=(Range const & r1, Range const & r2);
99 ChangeRange(lyx::pos_type s, lyx::pos_type e, Change const & c)
100 : range(Range(s, e)), change(c) {}
105 typedef std::vector<ChangeRange> ChangeTable;
107 /// our table of changes, every row a range and change descriptor
110 /// handle a delete, either logical or physical (see erase)
111 void del(Change const & change, ChangeTable::size_type pos);
113 /// handle an add, adjusting range bounds past it
114 void add(Change const & change, ChangeTable::size_type pos);
116 /// merge neighbouring ranges, assuming that they are abutting
117 /// (as done by set())