gitk: Fix bug in assigning row numbers to arcs

We weren't setting vtokmod and varcmod in renumbervarc, so after a
call to renumbervarc we sometimes weren't reassigning row numbers to
all the arcs whose row numbers had changed.  This fixes it.

This also collapses layoutmore and showstuff into one procedure and
gets rid of the phase variable.

Signed-off-by: Paul Mackerras <paulus@samba.org>

gitk

@@ -463,6 +463,16 @@ proc renumbervarc {a v} {
 	}
 	set b [lindex $vupptr($v) $a]
 	if {$b != $ka} {
+	    set tok [lindex $varctok($v) $ka]
+	    if {[string compare $tok $vtokmod($v)] < 0} {
+		set vtokmod($v) $tok
+		set varcmod($v) $ka
+	    }
+	    set tok [lindex $varctok($v) $b]
+	    if {[string compare $tok $vtokmod($v)] < 0} {
+		set vtokmod($v) $tok
+		set varcmod($v) $b
+	    }
 	    set c [lindex $vdownptr($v) $b]
 	    if {$c == $a} {
 		lset vdownptr($v) $b [lindex $vleftptr($v) $a]
@@ -1939,7 +1949,7 @@ proc about {} {
     message $w.m -text {
 Gitk - a commit viewer for git
 
-Copyright © 2005-2006 Paul Mackerras
+Copyright © 2005-2007 Paul Mackerras
 
 Use and redistribute under the terms of the GNU General Public License} \
 	    -justify center -aspect 400 -border 2 -bg white -relief groove
@@ -3375,30 +3385,20 @@ proc visiblerows {} {
 }
 
 proc layoutmore {} {
-    global commitidx viewcomplete numcommits
-    global uparrowlen downarrowlen mingaplen curview
-
-    set show $commitidx($curview)
-    if {$show > $numcommits || $viewcomplete($curview)} {
-	showstuff $show $viewcomplete($curview)
-    }
-}
-
-proc showstuff {canshow last} {
+    global commitidx viewcomplete curview
     global numcommits pending_select selectedline curview
-    global selectfirst
-    global lastscrollset commitinterest
+    global selectfirst lastscrollset commitinterest
 
+    set canshow $commitidx($curview)
+    if {$canshow <= $numcommits && !$viewcomplete($curview)} return
     if {$numcommits == 0} {
-	global phase
-	set phase "incrdraw"
 	allcanvs delete all
     }
     set r0 $numcommits
     set prev $numcommits
     set numcommits $canshow
     set t [clock clicks -milliseconds]
-    if {$prev < 100 || $last || $t - $lastscrollset > 500} {
+    if {$prev < 100 || $viewcomplete($curview) || $t - $lastscrollset > 500} {
 	set lastscrollset $t
 	setcanvscroll
     }
@@ -3426,12 +3426,12 @@ proc showstuff {canshow last} {
 }
 
 proc doshowlocalchanges {} {
-    global curview mainheadid phase
+    global curview mainheadid
 
     if {[commitinview $mainheadid $curview]} {
 	dodiffindex
-    } elseif {$phase ne {}} {
-	lappend commitinterest($mainheadid) {}
+    } else {
+	lappend commitinterest($mainheadid) {dodiffindex}
     }
 }