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* changes.[Ch]: introduce isSimilarTo(...);
	restore original operator==;
	When merging two adjacent changes, the changetime is not considered,
	only the equality of the change type and author is checked (in method
	isSimilarTo(...)). If two changes are in fact merged (in method merge()),
	the later change time is preserved.



git-svn-id: svn://svn.lyx.org/lyx/lyx-devel/trunk@15608 a592a061-630c-0410-9148-cb99ea01b6c8
This commit is contained in:
Michael Schmitt 2006-10-29 21:48:23 +00:00
parent b9c604e968
commit 8c20105106
2 changed files with 21 additions and 14 deletions
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32
src/changes.C
View File

@ -16,7 +16,6 @@
#include "changes.h"
#include "debug.h"
#include <cmath>
#include <boost/assert.hpp>
@ -31,27 +30,32 @@ using std::max;
* Class Change has a changetime field that specifies the exact time at which
* a specific change was made. The change time is used as a guidance for the
* user while editing his document. Presently, it is not considered for LaTeX
* export. To avoid that every keystroke results in a separate change, a
* tolerance interval of 5 minutes is used. That means if there are two adjacent
* changes that only differ in their change time with abs(ct1 - ct2) < 300 sec,
* they will be merged (and the later change time is preserved).
* Technically, the check for equality (or similarity) is made in operator==(...).
* The merging of similar changes happens in method merge().
* export.
* When merging two adjacent changes, the changetime is not considered,
* only the equality of the change type and author is checked (in method
* isSimilarTo(...)). If two changes are in fact merged (in method merge()),
* the later change time is preserved.
*/
bool operator==(Change const & l, Change const & r)
bool Change::isSimilarTo(Change const & change)
{
if (l.type != r.type) {
if (type != change.type) {
return false;
}
if (l.type == Change::UNCHANGED) {
if (type == Change::UNCHANGED) {
return true;
}
return l.author == r.author
// both changes made within 5 minutes?
&& abs(difftime(l.changetime, r.changetime)) < 300;
return author == change.author;
}
bool operator==(Change const & l, Change const & r)
{
return l.type == r.type &&
l.author == r.author &&
l.changetime == r.changetime;
}
@ -293,7 +297,7 @@ void Changes::merge()
if (it + 1 == table_.end())
break;
if (it->change == (it + 1)->change && it->range.end == (it + 1)->range.start) {
if (it->change.isSimilarTo((it + 1)->change) && it->range.end == (it + 1)->range.start) {
if (lyxerr.debugging(Debug::CHANGES)) {
lyxerr[Debug::CHANGES] << " merging ranges (" << it->range.start << ", "
<< it->range.end << ") and (" << (it + 1)->range.start << ", "

3
src/changes.h
View File

@ -36,6 +36,9 @@ public:
explicit Change(Type t, int a = 0, time_type ct = current_time())
: type(t), author(a), changetime(ct) {}
/// is the change similar to the given change such that both can be merged?
bool isSimilarTo(Change const & change);
Type type;
int author;