3 * This file is part of LyX, the document processor.
4 * Licence details can be found in the file COPYING.
9 * Full author contact details are available in file CREDITS.
11 * Record changes in a paragraph.
19 #include <boost/assert.hpp>
28 bool operator==(Change const & l, Change const & r)
30 return l.type == r.type && l.author == r.author
31 && l.changetime == r.changetime;
35 bool operator!=(Change const & l, Change const & r)
41 bool operator==(Changes::Range const & r1, Changes::Range const & r2)
43 return r1.start == r2.start && r1.end == r2.end;
47 bool operator!=(Changes::Range const & r1, Changes::Range const & r2)
53 bool Changes::Range::contains(Range const & r) const
55 return r.start >= start && r.end <= end;
59 bool Changes::Range::contains(pos_type const pos) const
61 return pos >= start && pos < end;
65 bool Changes::Range::intersects(Range const & r) const
67 return r.start < end && r.end > start; // end itself is not in the range!
71 void Changes::set(Change const & change, pos_type const pos)
73 set(change, pos, pos + 1);
77 void Changes::set(Change const & change, pos_type const start, pos_type const end)
79 if (lyxerr.debugging(Debug::CHANGES)) {
80 lyxerr[Debug::CHANGES] << "setting change (type: " << change.type
81 << ", author: " << change.author << ", time: " << change.changetime
82 << ") in range (" << start << ", " << end << ")" << endl;
85 Range const newRange(start, end);
87 ChangeTable::iterator it = table_.begin();
89 for (; it != table_.end(); ) {
90 // find super change, check for equal types, and do nothing
91 if (it->range.contains(newRange) && it->change.type == change.type) {
95 // current change starts like or follows new change
96 if (it->range.start >= start) {
100 // new change intersects with existing change
101 if (it->range.end > start) {
102 pos_type oldEnd = it->range.end;
103 it->range.end = start;
104 if (lyxerr.debugging(Debug::CHANGES)) {
105 lyxerr[Debug::CHANGES] << " cutting tail of type " << it->change.type
106 << " resulting in range (" << it->range.start << ", "
107 << it->range.end << ")" << endl;
111 if (lyxerr.debugging(Debug::CHANGES)) {
112 lyxerr[Debug::CHANGES] << " inserting tail in range ("
113 << end << ", " << oldEnd << ")" << endl;
115 it = table_.insert(it, ChangeRange((it-1)->change, Range(end, oldEnd)));
123 if (change.type != Change::UNCHANGED) {
124 if (lyxerr.debugging(Debug::CHANGES)) {
125 lyxerr[Debug::CHANGES] << " inserting change" << endl;
127 it = table_.insert(it, ChangeRange(change, Range(start, end)));
131 for (; it != table_.end(); ) {
132 // new change 'contains' existing change
133 if (newRange.contains(it->range)) {
134 if (lyxerr.debugging(Debug::CHANGES)) {
135 lyxerr[Debug::CHANGES] << " removing subrange ("
136 << it->range.start << ", " << it->range.end << ")" << endl;
138 it = table_.erase(it);
142 // new change precedes existing change
143 if (it->range.start >= end) {
147 // new change intersects with existing change
148 it->range.start = end;
149 if (lyxerr.debugging(Debug::CHANGES)) {
150 lyxerr[Debug::CHANGES] << " cutting head of type "
151 << it->change.type << " resulting in range ("
152 << end << ", " << it->range.end << ")" << endl;
154 break; // no need for another iteration
161 void Changes::erase(pos_type const pos)
163 ChangeTable::iterator it = table_.begin();
164 ChangeTable::iterator end = table_.end();
168 for (; it != end; ++it) {
169 Range & range(it->range);
171 if (lyxerr.debugging(Debug::CHANGES)) {
172 lyxerr[Debug::CHANGES] << "era:Range of type " << it->change.type << " is "
173 << it->range.start << "," << it->range.end << endl;
176 if (range.contains(pos)) {
191 Change const Changes::lookup(pos_type const pos) const
193 ChangeTable::const_iterator it = table_.begin();
194 ChangeTable::const_iterator const end = table_.end();
196 for (; it != end; ++it) {
197 if (it->range.contains(pos))
201 BOOST_ASSERT(false && "missing changes for pos");
202 return Change(Change::UNCHANGED);
206 bool Changes::isChanged(pos_type const start, pos_type const end) const
208 ChangeTable::const_iterator it = table_.begin();
209 ChangeTable::const_iterator const itend = table_.end();
211 for (; it != itend; ++it) {
212 if (lyxerr.debugging(Debug::CHANGES)) {
213 lyxerr[Debug::CHANGES] << "Looking for " << start << ","
214 << end << " in " << it->range.start << ","
215 << it->range.end << "of type " << it->change.type << endl;
218 if (it->range.intersects(Range(start, end))
219 && it->change.type != Change::UNCHANGED) {
220 if (lyxerr.debugging(Debug::CHANGES)) {
221 lyxerr[Debug::CHANGES] << "Found intersection of "
222 << start << "," << end << " with "
223 << it->range.start << "," << it->range.end
224 << " of type " << it->change.type << endl;
234 void Changes::merge()
236 if (lyxerr.debugging(Debug::CHANGES))
237 lyxerr[Debug::CHANGES] << "Starting merge" << endl;
239 ChangeTable::iterator it = table_.begin();
241 while (it != table_.end()) {
242 if (lyxerr.debugging(Debug::CHANGES)) {
243 lyxerr[Debug::CHANGES] << "Range of type " << it->change.type << " is "
244 << it->range.start << "," << it->range.end << endl;
247 if (it->range.start == it->range.end) {
248 if (lyxerr.debugging(Debug::CHANGES)) {
249 lyxerr[Debug::CHANGES] << "Removing empty range for pos "
250 << it->range.start << endl;
259 if (it + 1 == table_.end())
262 if (it->change == (it + 1)->change) {
263 if (lyxerr.debugging(Debug::CHANGES)) {
264 lyxerr[Debug::CHANGES] << "Merging equal ranges "
265 << it->range.start << "," << it->range.end
266 << " and " << (it + 1)->range.start << ","
267 << (it + 1)->range.end << endl;
270 (it + 1)->range.start = it->range.start;
280 lyxerr[Debug::CHANGES] << "Merge ended" << endl;
284 int Changes::latexMarkChange(odocstream & os,
285 Change::Type const old, Change::Type const change,
288 if (!output || old == change)
291 static docstring const start(from_ascii("\\changestart{}"));
292 static docstring const end(from_ascii("\\changeend{}"));
293 static docstring const son(from_ascii("\\overstrikeon{}"));
294 static docstring const soff(from_ascii("\\overstrikeoff{}"));
298 if (old == Change::DELETED) {
300 column += soff.length();
304 case Change::UNCHANGED:
306 column += end.length();
309 case Change::DELETED:
310 if (old == Change::UNCHANGED) {
312 column += start.length();
315 column += son.length();
318 case Change::INSERTED:
319 if (old == Change::UNCHANGED) {
321 column += start.length();
330 void Changes::lyxMarkChange(std::ostream & os, int & column,
331 time_type const curtime,
332 Change const & old, Change const & change)
339 switch (change.type) {
340 case Change::UNCHANGED:
341 os << "\n\\change_unchanged\n";
344 case Change::DELETED: {
345 time_type t = change.changetime;
348 os << "\n\\change_deleted " << change.author
354 case Change::INSERTED: {
355 time_type t = change.changetime;
358 os << "\n\\change_inserted " << change.author