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Improve the merge display when the result differs from all parents.

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Now we see if the result is quite similar to one of the parents, and
if it is, display the result as a diff from that parent.  If the result
is similar to more than one parent, pick the one that it's most
similar to.
This commit is contained in:
Paul Mackerras 2005-07-29 09:23:03 -05:00
parent 73b6a6cbda
commit c8a4acbf4a
1 changed files with 85 additions and 8 deletions
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@ -2054,7 +2054,6 @@ proc processgroup {} {
set pnum 0
foreach p $parents($id) {
set startline [expr {$grouplinestart + $diffoffset($p)}]
set offset($p) $diffoffset($p)
set ol $startline
set nl $grouplinestart
if {[info exists grouphunks($p)]} {
@ -2098,9 +2097,8 @@ proc processgroup {} {
set events [lsort -integer -index 0 $events]
set nevents [llength $events]
set nmerge $nparents($diffmergeid)
set i 0
set l $grouplinestart
while {$i < $nevents} {
for {set i 0} {$i < $nevents} {set i $j} {
set nl [lindex $events $i 0]
while {$l < $nl} {
$ctext insert end " $filelines($id,$f,$l)\n"
@ -2129,7 +2127,9 @@ proc processgroup {} {
}
set nlc [expr {$enl - $l}]
set ncol mresult
set bestpn -1
if {[llength $active] == $nmerge - 1} {
# no diff for one of the parents, i.e. it's identical
for {set pnum 0} {$pnum < $nmerge} {incr pnum} {
if {![info exists delta($pnum)]} {
if {$pnum < $mergemax} {
@ -2140,11 +2140,25 @@ proc processgroup {} {
break
}
}
} elseif {[llength $active] == $nmerge} {
# all parents are different, see if one is very similar
set bestsim 30
for {set pnum 0} {$pnum < $nmerge} {incr pnum} {
set sim [similarity $pnum $l $nlc $f \
[lrange $events $i [expr {$j-1}]]]
if {$sim > $bestsim} {
set bestsim $sim
set bestpn $pnum
}
}
if {$bestpn >= 0} {
lappend ncol m$bestpn
}
}
set pnum -1
foreach p $parents($id) {
incr pnum
if {![info exists delta($pnum)]} continue
if {![info exists delta($pnum)] || $pnum == $bestpn} continue
set olc [expr {$nlc + $delta($pnum)}]
set ol [expr {$l + $diffoffset($p)}]
incr diffoffset($p) $delta($pnum)
@ -2154,11 +2168,35 @@ proc processgroup {} {
incr ol
}
}
for {} {$nlc > 0} {incr nlc -1} {
$ctext insert end "+$filelines($id,$f,$l)\n" $ncol
incr l
set endl [expr {$l + $nlc}]
if {$bestpn >= 0} {
# show this pretty much as a normal diff
set p [lindex $parents($id) $bestpn]
set ol [expr {$l + $diffoffset($p)}]
incr diffoffset($p) $delta($bestpn)
unset delta($bestpn)
for {set k $i} {$k < $j} {incr k} {
set e [lindex $events $k]
if {[lindex $e 2] != $bestpn} continue
set nl [lindex $e 0]
set ol [expr {$ol + $nl - $l}]
for {} {$l < $nl} {incr l} {
$ctext insert end "+$filelines($id,$f,$l)\n" $ncol
}
set c [lindex $e 3]
for {} {$c > 0} {incr c -1} {
$ctext insert end "-$filelines($p,$f,$ol)\n" m$bestpn
incr ol
}
set nl [lindex $e 1]
for {} {$l < $nl} {incr l} {
$ctext insert end "+$filelines($id,$f,$l)\n" mresult
}
}
}
for {} {$l < $endl} {incr l} {
$ctext insert end "+$filelines($id,$f,$l)\n" $ncol
}
set i $j
}
while {$l < $grouplineend} {
$ctext insert end " $filelines($id,$f,$l)\n"
@ -2167,6 +2205,45 @@ proc processgroup {} {
$ctext conf -state disabled
}
proc similarity {pnum l nlc f events} {
global diffmergeid parents diffoffset filelines
set id $diffmergeid
set p [lindex $parents($id) $pnum]
set ol [expr {$l + $diffoffset($p)}]
set endl [expr {$l + $nlc}]
set same 0
set diff 0
foreach e $events {
if {[lindex $e 2] != $pnum} continue
set nl [lindex $e 0]
set ol [expr {$ol + $nl - $l}]
for {} {$l < $nl} {incr l} {
incr same [string length $filelines($id,$f,$l)]
incr same
}
set oc [lindex $e 3]
for {} {$oc > 0} {incr oc -1} {
incr diff [string length $filelines($p,$f,$ol)]
incr diff
incr ol
}
set nl [lindex $e 1]
for {} {$l < $nl} {incr l} {
incr diff [string length $filelines($id,$f,$l)]
incr diff
}
}
for {} {$l < $endl} {incr l} {
incr same [string length $filelines($id,$f,$l)]
incr same
}
if {$same == 0} {
return 0
}
return [expr {200 * $same / (2 * $same + $diff)}]
}
proc startdiff {ids} {
global treediffs diffids treepending diffmergeid