Merge branch 'jc/clone' into next

[git.git] / gitk

diff --git a/gitk b/gitk
index a9d37d9..f4c6624 100755 (executable)
--- a/gitk
+++ b/gitk
@@ -16,52 +16,69 @@ proc gitdir {} {
     }
 }
 
     }
 }
 

-proc getcommits {rargs} {
-    global commits commfd phase canv mainfont env
-    global startmsecs nextupdate ncmupdate
-    global ctext maincursor textcursor leftover
+proc parse_args {rargs} {
+    global parsed_args

 
 

-    # check that we can find a .git directory somewhere...
-    set gitdir [gitdir]
-    if {![file isdirectory $gitdir]} {
-       error_popup "Cannot find the git directory \"$gitdir\"."
-       exit 1
-    }
-    set commits {}
-    set phase getcommits
-    set startmsecs [clock clicks -milliseconds]
-    set nextupdate [expr $startmsecs + 100]
-    set ncmupdate 1
-    if [catch {
+    if {[catch {

        set parse_args [concat --default HEAD $rargs]
        set parsed_args [split [eval exec git-rev-parse $parse_args] "\n"]
        set parse_args [concat --default HEAD $rargs]
        set parsed_args [split [eval exec git-rev-parse $parse_args] "\n"]

-    }] {
+    }]} {

        # if git-rev-parse failed for some reason...
        if {$rargs == {}} {
            set rargs HEAD
        }
        set parsed_args $rargs
     }
        # if git-rev-parse failed for some reason...
        if {$rargs == {}} {
            set rargs HEAD
        }
        set parsed_args $rargs
     }

-    if [catch {
-       set commfd [open "|git-rev-list --header --topo-order --parents $parsed_args" r]
-    } err] {
+    return $parsed_args
+}
+
+proc start_rev_list {rlargs} {
+    global startmsecs nextupdate ncmupdate
+    global commfd leftover tclencoding
+
+    set startmsecs [clock clicks -milliseconds]
+    set nextupdate [expr {$startmsecs + 100}]
+    set ncmupdate 1
+    if {[catch {
+       set commfd [open [concat | git-rev-list --header --topo-order \
+                             --parents $rlargs] r]
+    } err]} {

        puts stderr "Error executing git-rev-list: $err"
        exit 1
     }
     set leftover {}
     fconfigure $commfd -blocking 0 -translation lf
        puts stderr "Error executing git-rev-list: $err"
        exit 1
     }
     set leftover {}
     fconfigure $commfd -blocking 0 -translation lf

+    if {$tclencoding != {}} {
+       fconfigure $commfd -encoding $tclencoding
+    }

     fileevent $commfd readable [list getcommitlines $commfd]
     fileevent $commfd readable [list getcommitlines $commfd]

+    . config -cursor watch
+    settextcursor watch
+}
+
+proc getcommits {rargs} {
+    global oldcommits commits phase canv mainfont env
+
+    # check that we can find a .git directory somewhere...
+    set gitdir [gitdir]
+    if {![file isdirectory $gitdir]} {
+       error_popup "Cannot find the git directory \"$gitdir\"."
+       exit 1
+    }
+    set oldcommits {}
+    set commits {}
+    set phase getcommits
+    start_rev_list [parse_args $rargs]

     $canv delete all
     $canv create text 3 3 -anchor nw -text "Reading commits..." \
        -font $mainfont -tags textitems
     $canv delete all
     $canv create text 3 3 -anchor nw -text "Reading commits..." \
        -font $mainfont -tags textitems

-    . config -cursor watch
-    settextcursor watch

 }
 
 proc getcommitlines {commfd}  {
 }
 
 proc getcommitlines {commfd}  {

-    global commits parents cdate children
-    global commitlisted phase commitinfo nextupdate
+    global oldcommits commits parents cdate children nchildren
+    global commitlisted phase nextupdate

     global stopped redisplaying leftover
     global stopped redisplaying leftover

+    global canv

 
     set stuff [read $commfd]
     if {$stuff == {}} {
 
     set stuff [read $commfd]
     if {$stuff == {}} {


@@ -74,9 +91,9 @@ proc getcommitlines {commfd}  {
        }
        if {[string range $err 0 4] == "usage"} {
            set err \
        }
        if {[string range $err 0 4] == "usage"} {
            set err \

-{Gitk: error reading commits: bad arguments to git-rev-list.
-(Note: arguments to gitk are passed to git-rev-list
-to allow selection of commits to be displayed.)}
+               "Gitk: error reading commits: bad arguments to git-rev-list.\
+               (Note: arguments to gitk are passed to git-rev-list\
+               to allow selection of commits to be displayed.)"

        } else {
            set err "Error reading commits: $err"
        }
        } else {
            set err "Error reading commits: $err"
        }


@@ -122,7 +139,7 @@ to allow selection of commits to be displayed.)}
        lappend commits $id
        set commitlisted($id) 1
        parsecommit $id $cmit 1 [lrange $ids 1 end]
        lappend commits $id
        set commitlisted($id) 1
        parsecommit $id $cmit 1 [lrange $ids 1 end]

-       drawcommit $id
+       drawcommit $id 1

        if {[clock clicks -milliseconds] >= $nextupdate} {
            doupdate 1
        }
        if {[clock clicks -milliseconds] >= $nextupdate} {
            doupdate 1
        }


@@ -132,7 +149,7 @@ to allow selection of commits to be displayed.)}
                set stopped 0
                set phase "getcommits"
                foreach id $commits {
                set stopped 0
                set phase "getcommits"
                foreach id $commits {

-                   drawcommit $id
+                   drawcommit $id 1

                    if {$stopped} break
                    if {[clock clicks -milliseconds] >= $nextupdate} {
                        doupdate 1
                    if {$stopped} break
                    if {[clock clicks -milliseconds] >= $nextupdate} {
                        doupdate 1


@@ -164,20 +181,103 @@ proc doupdate {reading} {
 }
 
 proc readcommit {id} {
 }
 
 proc readcommit {id} {

-    if [catch {set contents [exec git-cat-file commit $id]}] return
+    if {[catch {set contents [exec git-cat-file commit $id]}]} return

     parsecommit $id $contents 0 {}
 }
 
     parsecommit $id $contents 0 {}
 }
 

-proc parsecommit {id contents listed olds} {
-    global commitinfo children nchildren parents nparents cdate ncleft
+proc updatecommits {rargs} {
+    global commitlisted commfd phase
+    global startmsecs nextupdate ncmupdate
+    global idtags idheads idotherrefs
+    global leftover
+    global parsed_args
+    global canv mainfont
+    global oldcommits commits
+    global parents nchildren children ncleft
+
+    set old_args $parsed_args
+    parse_args $rargs
+
+    if {$phase == "getcommits" || $phase == "incrdraw"} {
+       # havent read all the old commits, just start again from scratch
+       stopfindproc
+       set oldcommits {}
+       set commits {}
+       foreach v {children nchildren parents commitlisted commitinfo
+                  selectedline matchinglines treediffs
+                  mergefilelist currentid rowtextx} {
+           global $v
+           catch {unset $v}
+       }
+       readrefs
+       if {$phase == "incrdraw"} {
+           allcanvs delete all
+           $canv create text 3 3 -anchor nw -text "Reading commits..." \
+               -font $mainfont -tags textitems
+           set phase getcommits
+       }
+       start_rev_list $parsed_args
+       return
+    }
+
+    foreach id $old_args {
+       if {![regexp {^[0-9a-f]{40}$} $id]} continue
+       if {[info exists oldref($id)]} continue
+       set oldref($id) $id
+       lappend ignoreold "^$id"
+    }
+    foreach id $parsed_args {
+       if {![regexp {^[0-9a-f]{40}$} $id]} continue
+       if {[info exists ref($id)]} continue
+       set ref($id) $id
+       lappend ignorenew "^$id"
+    }
+
+    foreach a $old_args {
+       if {![info exists ref($a)]} {
+           lappend ignorenew $a
+       }
+    }
+
+    set phase updatecommits
+    set oldcommits $commits
+    set commits {}
+    set removed_commits [split [eval exec git-rev-list $ignorenew] "\n" ]
+    if {[llength $removed_commits] > 0} {
+       allcanvs delete all
+       foreach c $removed_commits {
+           set i [lsearch -exact $oldcommits $c]
+           if {$i >= 0} {
+               set oldcommits [lreplace $oldcommits $i $i]
+               unset commitlisted($c)
+               foreach p $parents($c) {
+                   if {[info exists nchildren($p)]} {
+                       set j [lsearch -exact $children($p) $c]
+                       if {$j >= 0} {
+                           set children($p) [lreplace $children($p) $j $j]
+                           incr nchildren($p) -1
+                       }
+                   }
+               }
+           }
+       }
+       set phase removecommits
+    }
+
+    set args {}
+    foreach a $parsed_args {
+       if {![info exists oldref($a)]} {
+           lappend args $a
+       }
+    }
+
+    readrefs
+    start_rev_list [concat $ignoreold $args]
+}
+
+proc updatechildren {id olds} {
+    global children nchildren parents nparents ncleft

 
 

-    set inhdr 1
-    set comment {}
-    set headline {}
-    set auname {}
-    set audate {}
-    set comname {}
-    set comdate {}

     if {![info exists nchildren($id)]} {
        set children($id) {}
        set nchildren($id) 0
     if {![info exists nchildren($id)]} {
        set children($id) {}
        set nchildren($id) 0


@@ -196,42 +296,57 @@ proc parsecommit {id contents listed olds} {
            incr ncleft($p)
        }
     }
            incr ncleft($p)
        }
     }

-    foreach line [split $contents "\n"] {
-       if {$inhdr} {
-           if {$line == {}} {
-               set inhdr 0
-           } else {
-               set tag [lindex $line 0]
-               if {$tag == "author"} {
-                   set x [expr {[llength $line] - 2}]
-                   set audate [lindex $line $x]
-                   set auname [lrange $line 1 [expr {$x - 1}]]
-               } elseif {$tag == "committer"} {
-                   set x [expr {[llength $line] - 2}]
-                   set comdate [lindex $line $x]
-                   set comname [lrange $line 1 [expr {$x - 1}]]
-               }
-           }
-       } else {
-           if {$comment == {}} {
-               set headline [string trim $line]
-           } else {
-               append comment "\n"
-           }
-           if {!$listed} {
-               # git-rev-list indents the comment by 4 spaces;
-               # if we got this via git-cat-file, add the indentation
-               append comment "    "
-           }
-           append comment $line
+}
+
+proc parsecommit {id contents listed olds} {
+    global commitinfo cdate
+
+    set inhdr 1
+    set comment {}
+    set headline {}
+    set auname {}
+    set audate {}
+    set comname {}
+    set comdate {}
+    updatechildren $id $olds
+    set hdrend [string first "\n\n" $contents]
+    if {$hdrend < 0} {
+       # should never happen...
+       set hdrend [string length $contents]
+    }
+    set header [string range $contents 0 [expr {$hdrend - 1}]]
+    set comment [string range $contents [expr {$hdrend + 2}] end]
+    foreach line [split $header "\n"] {
+       set tag [lindex $line 0]
+       if {$tag == "author"} {
+           set audate [lindex $line end-1]
+           set auname [lrange $line 1 end-2]
+       } elseif {$tag == "committer"} {
+           set comdate [lindex $line end-1]
+           set comname [lrange $line 1 end-2]

        }
     }
        }
     }

-    if {$audate != {}} {
-       set audate [clock format $audate -format "%Y-%m-%d %H:%M:%S"]
+    set headline {}
+    # take the first line of the comment as the headline
+    set i [string first "\n" $comment]
+    if {$i >= 0} {
+       set headline [string trim [string range $comment 0 $i]]
+    } else {
+       set headline $comment
+    }
+    if {!$listed} {
+       # git-rev-list indents the comment by 4 spaces;
+       # if we got this via git-cat-file, add the indentation
+       set newcomment {}
+       foreach line [split $comment "\n"] {
+           append newcomment "    "
+           append newcomment $line
+           append newcomment "\n"
+       }
+       set comment $newcomment

     }
     if {$comdate != {}} {
        set cdate($id) $comdate
     }
     if {$comdate != {}} {
        set cdate($id) $comdate

-       set comdate [clock format $comdate -format "%Y-%m-%d %H:%M:%S"]

     }
     set commitinfo($id) [list $headline $auname $audate \
                             $comname $comdate $comment]
     }
     set commitinfo($id) [list $headline $auname $audate \
                             $comname $comdate $comment]


@@ -239,77 +354,46 @@ proc parsecommit {id contents listed olds} {
 
 proc readrefs {} {
     global tagids idtags headids idheads tagcontents
 
 proc readrefs {} {
     global tagids idtags headids idheads tagcontents

-
-    set tags [glob -nocomplain -types f [gitdir]/refs/tags/*]
-    foreach f $tags {
-       catch {
-           set fd [open $f r]
-           set line [read $fd]
-           if {[regexp {^[0-9a-f]{40}} $line id]} {
-               set direct [file tail $f]
-               set tagids($direct) $id
-               lappend idtags($id) $direct
-               set tagblob [exec git-cat-file tag $id]
-               set contents [split $tagblob "\n"]
-               set obj {}
-               set type {}
-               set tag {}
-               foreach l $contents {
-                   if {$l == {}} break
-                   switch -- [lindex $l 0] {
-                       "object" {set obj [lindex $l 1]}
-                       "type" {set type [lindex $l 1]}
-                       "tag" {set tag [string range $l 4 end]}
-                   }
-               }
-               if {$obj != {} && $type == "commit" && $tag != {}} {
-                   set tagids($tag) $obj
-                   lappend idtags($obj) $tag
-                   set tagcontents($tag) $tagblob
-               }
-           }
-           close $fd
-       }
-    }
-    set heads [glob -nocomplain -types f [gitdir]/refs/heads/*]
-    foreach f $heads {
-       catch {
-           set fd [open $f r]
-           set line [read $fd 40]
-           if {[regexp {^[0-9a-f]{40}} $line id]} {
-               set head [file tail $f]
-               set headids($head) $line
-               lappend idheads($line) $head
-           }
-           close $fd
-       }
-    }
-    readotherrefs refs {} {tags heads}
-}
-
-proc readotherrefs {base dname excl} {

     global otherrefids idotherrefs
 
     global otherrefids idotherrefs
 

-    set git [gitdir]
-    set files [glob -nocomplain -types f [file join $git $base *]]
-    foreach f $files {
-       catch {
-           set fd [open $f r]
-           set line [read $fd 40]
-           if {[regexp {^[0-9a-f]{40}} $line id]} {
-               set name "$dname[file tail $f]"
-               set otherrefids($name) $id
-               lappend idotherrefs($id) $name
+    foreach v {tagids idtags headids idheads otherrefids idotherrefs} {
+       catch {unset $v}
+    }
+    set refd [open [list | git-ls-remote [gitdir]] r]
+    while {0 <= [set n [gets $refd line]]} {
+       if {![regexp {^([0-9a-f]{40})   refs/([^^]*)$} $line \
+           match id path]} {
+           continue
+       }
+       if {![regexp {^(tags|heads)/(.*)$} $path match type name]} {
+           set type others
+           set name $path
+       }
+       if {$type == "tags"} {
+           set tagids($name) $id
+           lappend idtags($id) $name
+           set obj {}
+           set type {}
+           set tag {}
+           catch {
+               set commit [exec git-rev-parse "$id^0"]
+               if {"$commit" != "$id"} {
+                   set tagids($name) $commit
+                   lappend idtags($commit) $name
+               }
+           }           
+           catch {
+               set tagcontents($name) [exec git-cat-file tag "$id"]

            }
            }

-           close $fd
+       } elseif { $type == "heads" } {
+           set headids($name) $id
+           lappend idheads($id) $name
+       } else {
+           set otherrefids($name) $id
+           lappend idotherrefs($id) $name

        }
     }
        }
     }

-    set dirs [glob -nocomplain -types d [file join $git $base *]]
-    foreach d $dirs {
-       set dir [file tail $d]
-       if {[lsearch -exact $excl $dir] >= 0} continue
-       readotherrefs [file join $base $dir] "$dname$dir/" {}
-    }
+    close $refd

 }
 
 proc error_popup msg {
 }
 
 proc error_popup msg {


@@ -324,28 +408,32 @@ proc error_popup msg {
     tkwait window $w
 }
 
     tkwait window $w
 }
 

-proc makewindow {} {
+proc makewindow {rargs} {

     global canv canv2 canv3 linespc charspc ctext cflist textfont
     global findtype findtypemenu findloc findstring fstring geometry
     global entries sha1entry sha1string sha1but
     global maincursor textcursor curtextcursor
     global canv canv2 canv3 linespc charspc ctext cflist textfont
     global findtype findtypemenu findloc findstring fstring geometry
     global entries sha1entry sha1string sha1but
     global maincursor textcursor curtextcursor

-    global rowctxmenu gaudydiff mergemax
+    global rowctxmenu mergemax

 
     menu .bar
     .bar add cascade -label "File" -menu .bar.file
     menu .bar.file
 
     menu .bar
     .bar add cascade -label "File" -menu .bar.file
     menu .bar.file

+    .bar.file add command -label "Update" -command [list updatecommits $rargs]

     .bar.file add command -label "Reread references" -command rereadrefs
     .bar.file add command -label "Quit" -command doquit
     .bar.file add command -label "Reread references" -command rereadrefs
     .bar.file add command -label "Quit" -command doquit

+    menu .bar.edit
+    .bar add cascade -label "Edit" -menu .bar.edit
+    .bar.edit add command -label "Preferences" -command doprefs

     menu .bar.help
     .bar add cascade -label "Help" -menu .bar.help
     .bar.help add command -label "About gitk" -command about
     . configure -menu .bar
 
     if {![info exists geometry(canv1)]} {
     menu .bar.help
     .bar add cascade -label "Help" -menu .bar.help
     .bar.help add command -label "About gitk" -command about
     . configure -menu .bar
 
     if {![info exists geometry(canv1)]} {

-       set geometry(canv1) [expr 45 * $charspc]
-       set geometry(canv2) [expr 30 * $charspc]
-       set geometry(canv3) [expr 15 * $charspc]
-       set geometry(canvh) [expr 25 * $linespc + 4]
+       set geometry(canv1) [expr {45 * $charspc}]
+       set geometry(canv2) [expr {30 * $charspc}]
+       set geometry(canv3) [expr {15 * $charspc}]
+       set geometry(canvh) [expr {25 * $linespc + 4}]

        set geometry(ctextw) 80
        set geometry(ctexth) 30
        set geometry(cflistw) 30
        set geometry(ctextw) 80
        set geometry(ctexth) 30
        set geometry(cflistw) 30


@@ -446,25 +534,30 @@ proc makewindow {} {
     .ctop.cdet add .ctop.cdet.left
 
     $ctext tag conf filesep -font [concat $textfont bold] -back "#aaaaaa"
     .ctop.cdet add .ctop.cdet.left
 
     $ctext tag conf filesep -font [concat $textfont bold] -back "#aaaaaa"

-    if {$gaudydiff} {
-       $ctext tag conf hunksep -back blue -fore white
-       $ctext tag conf d0 -back "#ff8080"
-       $ctext tag conf d1 -back green
-    } else {
-       $ctext tag conf hunksep -fore blue
-       $ctext tag conf d0 -fore red
-       $ctext tag conf d1 -fore "#00a000"
-       $ctext tag conf m0 -fore red
-       $ctext tag conf m1 -fore blue
-       $ctext tag conf m2 -fore green
-       $ctext tag conf m3 -fore purple
-       $ctext tag conf m4 -fore brown
-       $ctext tag conf mmax -fore darkgrey
-       set mergemax 5
-       $ctext tag conf mresult -font [concat $textfont bold]
-       $ctext tag conf msep -font [concat $textfont bold]
-       $ctext tag conf found -back yellow
-    }
+    $ctext tag conf hunksep -fore blue
+    $ctext tag conf d0 -fore red
+    $ctext tag conf d1 -fore "#00a000"
+    $ctext tag conf m0 -fore red
+    $ctext tag conf m1 -fore blue
+    $ctext tag conf m2 -fore green
+    $ctext tag conf m3 -fore purple
+    $ctext tag conf m4 -fore brown
+    $ctext tag conf m5 -fore "#009090"
+    $ctext tag conf m6 -fore magenta
+    $ctext tag conf m7 -fore "#808000"
+    $ctext tag conf m8 -fore "#009000"
+    $ctext tag conf m9 -fore "#ff0080"
+    $ctext tag conf m10 -fore cyan
+    $ctext tag conf m11 -fore "#b07070"
+    $ctext tag conf m12 -fore "#70b0f0"
+    $ctext tag conf m13 -fore "#70f0b0"
+    $ctext tag conf m14 -fore "#f0b070"
+    $ctext tag conf m15 -fore "#ff70b0"
+    $ctext tag conf mmax -fore darkgrey
+    set mergemax 16
+    $ctext tag conf mresult -font [concat $textfont bold]
+    $ctext tag conf msep -font [concat $textfont bold]
+    $ctext tag conf found -back yellow

 
     frame .ctop.cdet.right
     set cflist .ctop.cdet.right.cfiles
 
     frame .ctop.cdet.right
     set cflist .ctop.cdet.right.cfiles


@@ -565,7 +658,7 @@ proc click {w} {
 
 proc savestuff {w} {
     global canv canv2 canv3 ctext cflist mainfont textfont
 
 proc savestuff {w} {
     global canv canv2 canv3 ctext cflist mainfont textfont

-    global stuffsaved findmergefiles gaudydiff maxgraphpct
+    global stuffsaved findmergefiles maxgraphpct

     global maxwidth
 
     if {$stuffsaved} return
     global maxwidth
 
     if {$stuffsaved} return


@@ -575,15 +668,14 @@ proc savestuff {w} {
        puts $f [list set mainfont $mainfont]
        puts $f [list set textfont $textfont]
        puts $f [list set findmergefiles $findmergefiles]
        puts $f [list set mainfont $mainfont]
        puts $f [list set textfont $textfont]
        puts $f [list set findmergefiles $findmergefiles]

-       puts $f [list set gaudydiff $gaudydiff]

        puts $f [list set maxgraphpct $maxgraphpct]
        puts $f [list set maxwidth $maxwidth]
        puts $f "set geometry(width) [winfo width .ctop]"
        puts $f "set geometry(height) [winfo height .ctop]"
        puts $f [list set maxgraphpct $maxgraphpct]
        puts $f [list set maxwidth $maxwidth]
        puts $f "set geometry(width) [winfo width .ctop]"
        puts $f "set geometry(height) [winfo height .ctop]"

-       puts $f "set geometry(canv1) [expr [winfo width $canv]-2]"
-       puts $f "set geometry(canv2) [expr [winfo width $canv2]-2]"
-       puts $f "set geometry(canv3) [expr [winfo width $canv3]-2]"
-       puts $f "set geometry(canvh) [expr [winfo height $canv]-2]"
+       puts $f "set geometry(canv1) [expr {[winfo width $canv]-2}]"
+       puts $f "set geometry(canv2) [expr {[winfo width $canv2]-2}]"
+       puts $f "set geometry(canv3) [expr {[winfo width $canv3]-2}]"
+       puts $f "set geometry(canvh) [expr {[winfo height $canv]-2}]"

        set wid [expr {([winfo width $ctext] - 8) \
                           / [font measure $textfont "0"]}]
        puts $f "set geometry(ctextw) $wid"
        set wid [expr {([winfo width $ctext] - 8) \
                           / [font measure $textfont "0"]}]
        puts $f "set geometry(ctextw) $wid"


@@ -598,7 +690,7 @@ proc savestuff {w} {
 
 proc resizeclistpanes {win w} {
     global oldwidth
 
 proc resizeclistpanes {win w} {
     global oldwidth

-    if [info exists oldwidth($win)] {
+    if {[info exists oldwidth($win)]} {

        set s0 [$win sash coord 0]
        set s1 [$win sash coord 1]
        if {$w < 60} {
        set s0 [$win sash coord 0]
        set s1 [$win sash coord 1]
        if {$w < 60} {


@@ -612,12 +704,12 @@ proc resizeclistpanes {win w} {
                set sash0 30
            }
            if {$sash1 < $sash0 + 20} {
                set sash0 30
            }
            if {$sash1 < $sash0 + 20} {

-               set sash1 [expr $sash0 + 20]
+               set sash1 [expr {$sash0 + 20}]

            }
            if {$sash1 > $w - 10} {
            }
            if {$sash1 > $w - 10} {

-               set sash1 [expr $w - 10]
+               set sash1 [expr {$w - 10}]

                if {$sash0 > $sash1 - 20} {
                if {$sash0 > $sash1 - 20} {

-                   set sash0 [expr $sash1 - 20]
+                   set sash0 [expr {$sash1 - 20}]

                }
            }
        }
                }
            }
        }


@@ -629,7 +721,7 @@ proc resizeclistpanes {win w} {
 
 proc resizecdetpanes {win w} {
     global oldwidth
 
 proc resizecdetpanes {win w} {
     global oldwidth

-    if [info exists oldwidth($win)] {
+    if {[info exists oldwidth($win)]} {

        set s0 [$win sash coord 0]
        if {$w < 60} {
            set sash0 [expr {int($w*3/4 - 2)}]
        set s0 [$win sash coord 0]
        if {$w < 60} {
            set sash0 [expr {int($w*3/4 - 2)}]


@@ -640,7 +732,7 @@ proc resizecdetpanes {win w} {
                set sash0 45
            }
            if {$sash0 > $w - 15} {
                set sash0 45
            }
            if {$sash0 > $w - 15} {

-               set sash0 [expr $w - 15]
+               set sash0 [expr {$w - 15}]

            }
        }
        $win sash place 0 $sash0 [lindex $s0 1]
            }
        }
        $win sash place 0 $sash0 [lindex $s0 1]


@@ -683,11 +775,11 @@ Use and redistribute under the terms of the GNU General Public License} \
 }
 
 proc assigncolor {id} {
 }
 
 proc assigncolor {id} {

-    global commitinfo colormap commcolors colors nextcolor
+    global colormap commcolors colors nextcolor

     global parents nparents children nchildren
     global cornercrossings crossings
 
     global parents nparents children nchildren
     global cornercrossings crossings
 

-    if [info exists colormap($id)] return
+    if {[info exists colormap($id)]} return

     set ncolors [llength $colors]
     if {$nparents($id) <= 1 && $nchildren($id) == 1} {
        set child [lindex $children($id) 0]
     set ncolors [llength $colors]
     if {$nparents($id) <= 1 && $nchildren($id) == 1} {
        set child [lindex $children($id) 0]


@@ -755,7 +847,6 @@ proc assigncolor {id} {
 
 proc initgraph {} {
     global canvy canvy0 lineno numcommits nextcolor linespc
 
 proc initgraph {} {
     global canvy canvy0 lineno numcommits nextcolor linespc

-    global mainline mainlinearrow sidelines

     global nchildren ncleft
     global displist nhyperspace
 
     global nchildren ncleft
     global displist nhyperspace
 


@@ -764,9 +855,11 @@ proc initgraph {} {
     set canvy $canvy0
     set lineno -1
     set numcommits 0
     set canvy $canvy0
     set lineno -1
     set numcommits 0

-    catch {unset mainline}
-    catch {unset mainlinearrow}
-    catch {unset sidelines}
+    foreach v {mainline mainlinearrow sidelines colormap cornercrossings
+               crossings idline lineid} {
+       global $v
+       catch {unset $v}
+    }

     foreach id [array names nchildren] {
        set ncleft($id) $nchildren($id)
     }
     foreach id [array names nchildren] {
        set ncleft($id) $nchildren($id)
     }


@@ -783,10 +876,12 @@ proc bindline {t id} {
     $canv bind $t <Button-1> "lineclick %x %y $id 1"
 }
 
     $canv bind $t <Button-1> "lineclick %x %y $id 1"
 }
 

-proc drawlines {id xtra} {
+proc drawlines {id xtra delold} {

     global mainline mainlinearrow sidelines lthickness colormap canv
 
     global mainline mainlinearrow sidelines lthickness colormap canv
 

-    $canv delete lines.$id
+    if {$delold} {
+       $canv delete lines.$id
+    }

     if {[info exists mainline($id)]} {
        set t [$canv create line $mainline($id) \
                   -width [expr {($xtra + 1) * $lthickness}] \
     if {[info exists mainline($id)]} {
        set t [$canv create line $mainline($id) \
                   -width [expr {($xtra + 1) * $lthickness}] \


@@ -849,19 +944,19 @@ proc drawcommitline {level} {
     }
     set x [xcoord $level $level $lineno]
     set y1 $canvy
     }
     set x [xcoord $level $level $lineno]
     set y1 $canvy

-    set canvy [expr $canvy + $linespc]
+    set canvy [expr {$canvy + $linespc}]

     allcanvs conf -scrollregion \
     allcanvs conf -scrollregion \

-       [list 0 0 0 [expr $y1 + 0.5 * $linespc + 2]]
+       [list 0 0 0 [expr {$y1 + 0.5 * $linespc + 2}]]

     if {[info exists mainline($id)]} {
        lappend mainline($id) $x $y1
        if {$mainlinearrow($id) ne "none"} {
            set mainline($id) [trimdiagstart $mainline($id)]
        }
     }
     if {[info exists mainline($id)]} {
        lappend mainline($id) $x $y1
        if {$mainlinearrow($id) ne "none"} {
            set mainline($id) [trimdiagstart $mainline($id)]
        }
     }

-    drawlines $id 0
+    drawlines $id 0 0

     set orad [expr {$linespc / 3}]
     set orad [expr {$linespc / 3}]

-    set t [$canv create oval [expr $x - $orad] [expr $y1 - $orad] \
-              [expr $x + $orad - 1] [expr $y1 + $orad - 1] \
+    set t [$canv create oval [expr {$x - $orad}] [expr {$y1 - $orad}] \
+              [expr {$x + $orad - 1}] [expr {$y1 + $orad - 1}] \

               -fill $ofill -outline black -width 1]
     $canv raise $t
     $canv bind $t <1> {selcanvline {} %x %y}
               -fill $ofill -outline black -width 1]
     $canv raise $t
     $canv bind $t <1> {selcanvline {} %x %y}


@@ -878,6 +973,7 @@ proc drawcommitline {level} {
     set headline [lindex $commitinfo($id) 0]
     set name [lindex $commitinfo($id) 1]
     set date [lindex $commitinfo($id) 2]
     set headline [lindex $commitinfo($id) 0]
     set name [lindex $commitinfo($id) 1]
     set date [lindex $commitinfo($id) 2]

+    set date [formatdate $date]

     set linehtag($lineno) [$canv create text $xt $y1 -anchor w \
                               -text $headline -font $mainfont ]
     $canv bind $linehtag($lineno) <Button-3> "rowmenu %X %Y $id"
     set linehtag($lineno) [$canv create text $xt $y1 -anchor w \
                               -text $headline -font $mainfont ]
     $canv bind $linehtag($lineno) <Button-3> "rowmenu %X %Y $id"


@@ -915,8 +1011,8 @@ proc drawtags {id x xt y1} {
     }
 
     set delta [expr {int(0.5 * ($linespc - $lthickness))}]
     }
 
     set delta [expr {int(0.5 * ($linespc - $lthickness))}]

-    set yt [expr $y1 - 0.5 * $linespc]
-    set yb [expr $yt + $linespc - 1]
+    set yt [expr {$y1 - 0.5 * $linespc}]
+    set yb [expr {$yt + $linespc - 1}]

     set xvals {}
     set wvals {}
     foreach tag $marks {
     set xvals {}
     set wvals {}
     foreach tag $marks {


@@ -929,12 +1025,12 @@ proc drawtags {id x xt y1} {
               -width $lthickness -fill black -tags tag.$id]
     $canv lower $t
     foreach tag $marks x $xvals wid $wvals {
               -width $lthickness -fill black -tags tag.$id]
     $canv lower $t
     foreach tag $marks x $xvals wid $wvals {

-       set xl [expr $x + $delta]
-       set xr [expr $x + $delta + $wid + $lthickness]
+       set xl [expr {$x + $delta}]
+       set xr [expr {$x + $delta + $wid + $lthickness}]

        if {[incr ntags -1] >= 0} {
            # draw a tag
        if {[incr ntags -1] >= 0} {
            # draw a tag

-           set t [$canv create polygon $x [expr $yt + $delta] $xl $yt \
-                      $xr $yt $xr $yb $xl $yb $x [expr $yb - $delta] \
+           set t [$canv create polygon $x [expr {$yt + $delta}] $xl $yt \
+                      $xr $yt $xr $yb $xl $yb $x [expr {$yb - $delta}] \

                       -width 1 -outline black -fill yellow -tags tag.$id]
            $canv bind $t <1> [list showtag $tag 1]
            set rowtextx($idline($id)) [expr {$xr + $linespc}]
                       -width 1 -outline black -fill yellow -tags tag.$id]
            $canv bind $t <1> [list showtag $tag 1]
            set rowtextx($idline($id)) [expr {$xr + $linespc}]


@@ -945,7 +1041,7 @@ proc drawtags {id x xt y1} {
            } else {
                set col "#ddddff"
            }
            } else {
                set col "#ddddff"
            }

-           set xl [expr $xl - $delta/2]
+           set xl [expr {$xl - $delta/2}]

            $canv create polygon $x $yt $xr $yt $xr $yb $x $yb \
                -width 1 -outline black -fill $col -tags tag.$id
        }
            $canv create polygon $x $yt $xr $yt $xr $yb $x $yb \
                -width 1 -outline black -fill $col -tags tag.$id
        }


@@ -1432,62 +1528,75 @@ proc decidenext {{noread 0}} {
            }
        }
     }
            }
        }
     }

-    if {$level < 0} {
-       if {$todo != {}} {
-           puts "ERROR: none of the pending commits can be done yet:"
-           foreach p $todo {
-               puts "  $p ($ncleft($p))"
-           }
-       }
-       return -1
-    }

 
     return $level
 }
 
 
     return $level
 }
 

-proc drawcommit {id} {
-    global phase todo nchildren datemode nextupdate
-    global numcommits ncmupdate displayorder todo onscreen
+proc drawcommit {id reading} {
+    global phase todo nchildren datemode nextupdate revlistorder ncleft
+    global numcommits ncmupdate displayorder todo onscreen parents
+    global commitlisted commitordered

 
     if {$phase != "incrdraw"} {
        set phase incrdraw
        set displayorder {}
        set todo {}
        initgraph
 
     if {$phase != "incrdraw"} {
        set phase incrdraw
        set displayorder {}
        set todo {}
        initgraph

+       catch {unset commitordered}

     }
     }

+    set commitordered($id) 1

     if {$nchildren($id) == 0} {
        lappend todo $id
        set onscreen($id) 0
     }
     if {$nchildren($id) == 0} {
        lappend todo $id
        set onscreen($id) 0
     }

-    set level [decidenext 1]
-    if {$level == {} || $id != [lindex $todo $level]} {
-       return
-    }
-    while 1 {
-       lappend displayorder [lindex $todo $level]
-       if {[updatetodo $level $datemode]} {
-           set level [decidenext 1]
-           if {$level == {}} break
+    if {$revlistorder} {
+       set level [lsearch -exact $todo $id]
+       if {$level < 0} {
+           error_popup "oops, $id isn't in todo"
+           return

        }
        }

-       set id [lindex $todo $level]
-       if {![info exists commitlisted($id)]} {
-           break
+       lappend displayorder $id
+       updatetodo $level 0
+    } else {
+       set level [decidenext 1]
+       if {$level == {} || $level < 0} return
+       while 1 {
+           set id [lindex $todo $level]
+           if {![info exists commitordered($id)]} {
+               break
+           }
+           lappend displayorder [lindex $todo $level]
+           if {[updatetodo $level $datemode]} {
+               set level [decidenext 1]
+               if {$level == {} || $level < 0} break
+           }

        }
     }
        }
     }

-    drawmore 1
+    drawmore $reading

 }
 
 proc finishcommits {} {
 }
 
 proc finishcommits {} {

-    global phase
+    global phase oldcommits commits

     global canv mainfont ctext maincursor textcursor
     global canv mainfont ctext maincursor textcursor

+    global parents displayorder todo

 
 

-    if {$phase != "incrdraw"} {
+    if {$phase == "incrdraw" || $phase == "removecommits"} {
+       foreach id $oldcommits {
+           lappend commits $id
+           drawcommit $id 0
+       }
+       set oldcommits {}
+       drawrest
+    } elseif {$phase == "updatecommits"} {
+       # there were no new commits, in fact
+       set commits $oldcommits
+       set oldcommits {}
+       set phase {}
+    } else {

        $canv delete all
        $canv create text 3 3 -anchor nw -text "No commits selected" \
            -font $mainfont -tags textitems
        set phase {}
        $canv delete all
        $canv create text 3 3 -anchor nw -text "No commits selected" \
            -font $mainfont -tags textitems
        set phase {}

-    } else {
-       drawrest

     }
     . config -cursor $maincursor
     settextcursor $textcursor
     }
     . config -cursor $maincursor
     settextcursor $textcursor


@@ -1510,7 +1619,7 @@ proc drawgraph {} {
 
     if {$displayorder == {}} return
     set startmsecs [clock clicks -milliseconds]
 
     if {$displayorder == {}} return
     set startmsecs [clock clicks -milliseconds]

-    set nextupdate [expr $startmsecs + 100]
+    set nextupdate [expr {$startmsecs + 100}]

     set ncmupdate 1
     initgraph
     foreach id $displayorder {
     set ncmupdate 1
     initgraph
     foreach id $displayorder {


@@ -1521,9 +1630,9 @@ proc drawgraph {} {
 
 proc drawrest {} {
     global phase stopped redisplaying selectedline
 
 proc drawrest {} {
     global phase stopped redisplaying selectedline

-    global datemode todo displayorder
+    global datemode todo displayorder ncleft

     global numcommits ncmupdate
     global numcommits ncmupdate

-    global nextupdate startmsecs
+    global nextupdate startmsecs revlistorder

 
     set level [decidenext]
     if {$level >= 0} {
 
     set level [decidenext]
     if {$level >= 0} {


@@ -1536,10 +1645,17 @@ proc drawrest {} {
                if {$level < 0} break
            }
        }
                if {$level < 0} break
            }
        }

-       drawmore 0

     }
     }

+    if {$todo != {}} {
+       puts "ERROR: none of the pending commits can be done yet:"
+       foreach p $todo {
+           puts "  $p ($ncleft($p))"
+       }
+    }
+
+    drawmore 0

     set phase {}
     set phase {}

-    set drawmsecs [expr [clock clicks -milliseconds] - $startmsecs]
+    set drawmsecs [expr {[clock clicks -milliseconds] - $startmsecs}]

     #puts "overall $drawmsecs ms for $numcommits commits"
     if {$redisplaying} {
        if {$stopped == 0 && [info exists selectedline]} {
     #puts "overall $drawmsecs ms for $numcommits commits"
     if {$redisplaying} {
        if {$stopped == 0 && [info exists selectedline]} {


@@ -1567,8 +1683,8 @@ proc findmatches {f} {
        set matches {}
        set i 0
        while {[set j [string first $foundstring $str $i]] >= 0} {
        set matches {}
        set i 0
        while {[set j [string first $foundstring $str $i]] >= 0} {

-           lappend matches [list $j [expr $j+$foundstrlen-1]]
-           set i [expr $j + $foundstrlen]
+           lappend matches [list $j [expr {$j+$foundstrlen-1}]]
+           set i [expr {$j + $foundstrlen}]

        }
     }
     return $matches
        }
     }
     return $matches


@@ -1649,7 +1765,7 @@ proc findselectline {l} {
        set matches [findmatches $f]
        foreach match $matches {
            set start [lindex $match 0]
        set matches [findmatches $f]
        foreach match $matches {
            set start [lindex $match 0]

-           set end [expr [lindex $match 1] + 1]
+           set end [expr {[lindex $match 1] + 1}]

            $ctext tag add found "1.0 + $start c" "1.0 + $end c"
        }
     }
            $ctext tag add found "1.0 + $start c" "1.0 + $end c"
        }
     }


@@ -1820,7 +1936,7 @@ proc findfiles {} {
     global selectedline numcommits lineid ctext
     global ffileline finddidsel parents nparents
     global findinprogress findstartline findinsertpos
     global selectedline numcommits lineid ctext
     global ffileline finddidsel parents nparents
     global findinprogress findstartline findinsertpos

-    global treediffs fdiffids fdiffsneeded fdiffpos
+    global treediffs fdiffid fdiffsneeded fdiffpos

     global findmergefiles
 
     if {$numcommits == 0} return
     global findmergefiles
 
     if {$numcommits == 0} return


@@ -1837,11 +1953,9 @@ proc findfiles {} {
     while 1 {
        set id $lineid($l)
        if {$findmergefiles || $nparents($id) == 1} {
     while 1 {
        set id $lineid($l)
        if {$findmergefiles || $nparents($id) == 1} {

-           foreach p $parents($id) {
-               if {![info exists treediffs([list $id $p])]} {
-                   append diffsneeded "$id $p\n"
-                   lappend fdiffsneeded [list $id $p]
-               }
+           if {![info exists treediffs($id)]} {
+               append diffsneeded "$id\n"
+               lappend fdiffsneeded $id

            }
        }
        if {[incr l] >= $numcommits} {
            }
        }
        if {[incr l] >= $numcommits} {


@@ -1858,7 +1972,7 @@ proc findfiles {} {
            error_popup "Error starting search process: $err"
            return
        }
            error_popup "Error starting search process: $err"
            return
        }

-       catch {unset fdiffids}
+       catch {unset fdiffid}

        set fdiffpos 0
        fconfigure $df -blocking 0
        fileevent $df readable [list readfilediffs $df]
        set fdiffpos 0
        fconfigure $df -blocking 0
        fileevent $df readable [list readfilediffs $df]


@@ -1867,16 +1981,15 @@ proc findfiles {} {
     set finddidsel 0
     set findinsertpos end
     set id $lineid($l)
     set finddidsel 0
     set findinsertpos end
     set id $lineid($l)

-    set p [lindex $parents($id) 0]

     . config -cursor watch
     settextcursor watch
     set findinprogress 1
     . config -cursor watch
     settextcursor watch
     set findinprogress 1

-    findcont [list $id $p]
+    findcont $id

     update
 }
 
 proc readfilediffs {df} {
     update
 }
 
 proc readfilediffs {df} {

-    global findids fdiffids fdiffs
+    global findid fdiffid fdiffs

 
     set n [gets $df line]
     if {$n < 0} {
 
     set n [gets $df line]
     if {$n < 0} {


@@ -1886,19 +1999,19 @@ proc readfilediffs {df} {
                stopfindproc
                bell
                error_popup "Error in git-diff-tree: $err"
                stopfindproc
                bell
                error_popup "Error in git-diff-tree: $err"

-           } elseif {[info exists findids]} {
-               set ids $findids
+           } elseif {[info exists findid]} {
+               set id $findid

                stopfindproc
                bell
                stopfindproc
                bell

-               error_popup "Couldn't find diffs for {$ids}"
+               error_popup "Couldn't find diffs for $id"

            }
        }
        return
     }
            }
        }
        return
     }

-    if {[regexp {^([0-9a-f]{40}) \(from ([0-9a-f]{40})\)} $line match id p]} {
+    if {[regexp {^([0-9a-f]{40})$} $line match id]} {

        # start of a new string of diffs
        donefilediff
        # start of a new string of diffs
        donefilediff

-       set fdiffids [list $id $p]
+       set fdiffid $id

        set fdiffs {}
     } elseif {[string match ":*" $line]} {
        lappend fdiffs [lindex $line 5]
        set fdiffs {}
     } elseif {[string match ":*" $line]} {
        lappend fdiffs [lindex $line 5]


@@ -1906,53 +2019,50 @@ proc readfilediffs {df} {
 }
 
 proc donefilediff {} {
 }
 
 proc donefilediff {} {

-    global fdiffids fdiffs treediffs findids
+    global fdiffid fdiffs treediffs findid

     global fdiffsneeded fdiffpos
 
     global fdiffsneeded fdiffpos
 

-    if {[info exists fdiffids]} {
-       while {[lindex $fdiffsneeded $fdiffpos] ne $fdiffids
+    if {[info exists fdiffid]} {
+       while {[lindex $fdiffsneeded $fdiffpos] ne $fdiffid

               && $fdiffpos < [llength $fdiffsneeded]} {
            # git-diff-tree doesn't output anything for a commit
            # which doesn't change anything
               && $fdiffpos < [llength $fdiffsneeded]} {
            # git-diff-tree doesn't output anything for a commit
            # which doesn't change anything

-           set nullids [lindex $fdiffsneeded $fdiffpos]
-           set treediffs($nullids) {}
-           if {[info exists findids] && $nullids eq $findids} {
-               unset findids
-               findcont $nullids
+           set nullid [lindex $fdiffsneeded $fdiffpos]
+           set treediffs($nullid) {}
+           if {[info exists findid] && $nullid eq $findid} {
+               unset findid
+               findcont $nullid

            }
            incr fdiffpos
        }
        incr fdiffpos
 
            }
            incr fdiffpos
        }
        incr fdiffpos
 

-       if {![info exists treediffs($fdiffids)]} {
-           set treediffs($fdiffids) $fdiffs
+       if {![info exists treediffs($fdiffid)]} {
+           set treediffs($fdiffid) $fdiffs

        }
        }

-       if {[info exists findids] && $fdiffids eq $findids} {
-           unset findids
-           findcont $fdiffids
+       if {[info exists findid] && $fdiffid eq $findid} {
+           unset findid
+           findcont $fdiffid

        }
     }
 }
 
        }
     }
 }
 

-proc findcont {ids} {
-    global findids treediffs parents nparents
+proc findcont {id} {
+    global findid treediffs parents nparents

     global ffileline findstartline finddidsel
     global lineid numcommits matchinglines findinprogress
     global findmergefiles
 
     global ffileline findstartline finddidsel
     global lineid numcommits matchinglines findinprogress
     global findmergefiles
 

-    set id [lindex $ids 0]
-    set p [lindex $ids 1]
-    set pi [lsearch -exact $parents($id) $p]

     set l $ffileline
     while 1 {
        if {$findmergefiles || $nparents($id) == 1} {
     set l $ffileline
     while 1 {
        if {$findmergefiles || $nparents($id) == 1} {

-           if {![info exists treediffs($ids)]} {
-               set findids $ids
+           if {![info exists treediffs($id)]} {
+               set findid $id

                set ffileline $l
                return
            }
            set doesmatch 0
                set ffileline $l
                return
            }
            set doesmatch 0

-           foreach f $treediffs($ids) {
+           foreach f $treediffs($id) {

                set x [findmatches $f]
                if {$x != {}} {
                    set doesmatch 1
                set x [findmatches $f]
                if {$x != {}} {
                    set doesmatch 1


@@ -1961,21 +2071,13 @@ proc findcont {ids} {
            }
            if {$doesmatch} {
                insertmatch $l $id
            }
            if {$doesmatch} {
                insertmatch $l $id

-               set pi $nparents($id)

            }
            }

-       } else {
-           set pi $nparents($id)

        }
        }

-       if {[incr pi] >= $nparents($id)} {
-           set pi 0
-           if {[incr l] >= $numcommits} {
-               set l 0
-           }
-           if {$l == $findstartline} break
-           set id $lineid($l)
+       if {[incr l] >= $numcommits} {
+           set l 0

        }
        }

-       set p [lindex $parents($id) $pi]
-       set ids [list $id $p]
+       if {$l == $findstartline} break
+       set id $lineid($l)

     }
     stopfindproc
     if {!$finddidsel} {
     }
     stopfindproc
     if {!$finddidsel} {


@@ -2003,9 +2105,10 @@ proc markmatches {canv l str tag matches font} {
        set start [lindex $match 0]
        set end [lindex $match 1]
        if {$start > $end} continue
        set start [lindex $match 0]
        set end [lindex $match 1]
        if {$start > $end} continue

-       set xoff [font measure $font [string range $str 0 [expr $start-1]]]
-       set xlen [font measure $font [string range $str 0 [expr $end]]]
-       set t [$canv create rect [expr $x0+$xoff] $y0 [expr $x0+$xlen+2] $y1 \
+       set xoff [font measure $font [string range $str 0 [expr {$start-1}]]]
+       set xlen [font measure $font [string range $str 0 [expr {$end}]]]
+       set t [$canv create rect [expr {$x0+$xoff}] $y0 \
+                  [expr {$x0+$xlen+2}] $y1 \

                   -outline {} -tags matches -fill yellow]
        $canv lower $t
     }
                   -outline {} -tags matches -fill yellow]
        $canv lower $t
     }


@@ -2076,6 +2179,7 @@ proc selectline {l isnew} {
     global canvy0 linespc parents nparents children
     global cflist currentid sha1entry
     global commentend idtags idline linknum
     global canvy0 linespc parents nparents children
     global cflist currentid sha1entry
     global commentend idtags idline linknum

+    global mergemax

 
     $canv delete hover
     normalline
 
     $canv delete hover
     normalline


@@ -2097,8 +2201,8 @@ proc selectline {l isnew} {
     set ytop [expr {$y - $linespc - 1}]
     set ybot [expr {$y + $linespc + 1}]
     set wnow [$canv yview]
     set ytop [expr {$y - $linespc - 1}]
     set ybot [expr {$y + $linespc + 1}]
     set wnow [$canv yview]

-    set wtop [expr [lindex $wnow 0] * $ymax]
-    set wbot [expr [lindex $wnow 1] * $ymax]
+    set wtop [expr {[lindex $wnow 0] * $ymax}]
+    set wbot [expr {[lindex $wnow 1] * $ymax}]

     set wh [expr {$wbot - $wtop}]
     set newtop $wtop
     if {$ytop < $wtop} {
     set wh [expr {$wbot - $wtop}]
     set newtop $wtop
     if {$ytop < $wtop} {


@@ -2124,7 +2228,7 @@ proc selectline {l isnew} {
        if {$newtop < 0} {
            set newtop 0
        }
        if {$newtop < 0} {
            set newtop 0
        }

-       allcanvs yview moveto [expr $newtop * 1.0 / $ymax]
+       allcanvs yview moveto [expr {$newtop * 1.0 / $ymax}]

     }
 
     if {$isnew} {
     }
 
     if {$isnew} {


@@ -2146,8 +2250,10 @@ proc selectline {l isnew} {
     $ctext mark set fmark.0 0.0
     $ctext mark gravity fmark.0 left
     set info $commitinfo($id)
     $ctext mark set fmark.0 0.0
     $ctext mark gravity fmark.0 left
     set info $commitinfo($id)

-    $ctext insert end "Author: [lindex $info 1]  [lindex $info 2]\n"
-    $ctext insert end "Committer: [lindex $info 3]  [lindex $info 4]\n"
+    set date [formatdate [lindex $info 2]]
+    $ctext insert end "Author: [lindex $info 1]  $date\n"
+    set date [formatdate [lindex $info 4]]
+    $ctext insert end "Committer: [lindex $info 3]  $date\n"

     if {[info exists idtags($id)]} {
        $ctext insert end "Tags:"
        foreach tag $idtags($id) {
     if {[info exists idtags($id)]} {
        $ctext insert end "Tags:"
        foreach tag $idtags($id) {


@@ -2157,11 +2263,26 @@ proc selectline {l isnew} {
     }
  
     set comment {}
     }
  
     set comment {}

-    if {[info exists parents($id)]} {
+    if {$nparents($id) > 1} {
+       set np 0

        foreach p $parents($id) {
        foreach p $parents($id) {

-           append comment "Parent: [commit_descriptor $p]\n"
+           if {$np >= $mergemax} {
+               set tag mmax
+           } else {
+               set tag m$np
+           }
+           $ctext insert end "Parent: " $tag
+           appendwithlinks [commit_descriptor $p]
+           incr np
+       }
+    } else {
+       if {[info exists parents($id)]} {
+           foreach p $parents($id) {
+               append comment "Parent: [commit_descriptor $p]\n"
+           }

        }
     }
        }
     }

+

     if {[info exists children($id)]} {
        foreach c $children($id) {
            append comment "Child:  [commit_descriptor $c]\n"
     if {[info exists children($id)]} {
        foreach c $children($id) {
            append comment "Child:  [commit_descriptor $c]\n"


@@ -2181,7 +2302,7 @@ proc selectline {l isnew} {
     $cflist delete 0 end
     $cflist insert end "Comments"
     if {$nparents($id) == 1} {
     $cflist delete 0 end
     $cflist insert end "Comments"
     if {$nparents($id) == 1} {

-       startdiff [concat $id $parents($id)]
+       startdiff $id

     } elseif {$nparents($id) > 1} {
        mergediff $id
     }
     } elseif {$nparents($id) > 1} {
        mergediff $id
     }


@@ -2190,7 +2311,7 @@ proc selectline {l isnew} {
 proc selnextline {dir} {
     global selectedline
     if {![info exists selectedline]} return
 proc selnextline {dir} {
     global selectedline
     if {![info exists selectedline]} return

-    set l [expr $selectedline + $dir]
+    set l [expr {$selectedline + $dir}]

     unmarkmatches
     selectline $l 1
 }
     unmarkmatches
     selectline $l 1
 }


@@ -2253,529 +2374,100 @@ proc goforw {} {
 }
 
 proc mergediff {id} {
 }
 
 proc mergediff {id} {

-    global parents diffmergeid diffmergegca mergefilelist diffpindex
+    global parents diffmergeid diffopts mdifffd
+    global difffilestart

 
     set diffmergeid $id
 
     set diffmergeid $id

-    set diffpindex -1
-    set diffmergegca [findgca $parents($id)]
-    if {[info exists mergefilelist($id)]} {
-       if {$mergefilelist($id) ne {}} {
-           showmergediff
-       }
-    } else {
-       contmergediff {}
-    }
-}
-
-proc findgca {ids} {
-    set gca {}
-    foreach id $ids {
-       if {$gca eq {}} {
-           set gca $id
-       } else {
-           if {[catch {
-               set gca [exec git-merge-base $gca $id]
-           } err]} {
-               return {}
-           }
-       }
-    }
-    return $gca
-}
-
-proc contmergediff {ids} {
-    global diffmergeid diffpindex parents nparents diffmergegca
-    global treediffs mergefilelist diffids treepending
-
-    # diff the child against each of the parents, and diff
-    # each of the parents against the GCA.
-    while 1 {
-       if {[lindex $ids 0] == $diffmergeid && $diffmergegca ne {}} {
-           set ids [list [lindex $ids 1] $diffmergegca]
-       } else {
-           if {[incr diffpindex] >= $nparents($diffmergeid)} break
-           set p [lindex $parents($diffmergeid) $diffpindex]
-           set ids [list $diffmergeid $p]
-       }
-       if {![info exists treediffs($ids)]} {
-           set diffids $ids
-           if {![info exists treepending]} {
-               gettreediffs $ids
-           }
-           return
-       }
-    }
-
-    # If a file in some parent is different from the child and also
-    # different from the GCA, then it's interesting.
-    # If we don't have a GCA, then a file is interesting if it is
-    # different from the child in all the parents.
-    if {$diffmergegca ne {}} {
-       set files {}
-       foreach p $parents($diffmergeid) {
-           set gcadiffs $treediffs([list $p $diffmergegca])
-           foreach f $treediffs([list $diffmergeid $p]) {
-               if {[lsearch -exact $files $f] < 0
-                   && [lsearch -exact $gcadiffs $f] >= 0} {
-                   lappend files $f
-               }
-           }
-       }
-       set files [lsort $files]
-    } else {
-       set p [lindex $parents($diffmergeid) 0]
-       set files $treediffs([list $diffmergeid $p])
-       for {set i 1} {$i < $nparents($diffmergeid) && $files ne {}} {incr i} {
-           set p [lindex $parents($diffmergeid) $i]
-           set df $treediffs([list $diffmergeid $p])
-           set nf {}
-           foreach f $files {
-               if {[lsearch -exact $df $f] >= 0} {
-                   lappend nf $f
-               }
-           }
-           set files $nf
-       }
-    }
-
-    set mergefilelist($diffmergeid) $files
-    if {$files ne {}} {
-       showmergediff
-    }
-}
-
-proc showmergediff {} {
-    global cflist diffmergeid mergefilelist parents
-    global diffopts diffinhunk currentfile currenthunk filelines
-    global diffblocked groupfilelast mergefds groupfilenum grouphunks
-
-    set files $mergefilelist($diffmergeid)
-    foreach f $files {
-       $cflist insert end $f
-    }
+    catch {unset difffilestart}
+    # this doesn't seem to actually affect anything...

     set env(GIT_DIFF_OPTS) $diffopts
     set env(GIT_DIFF_OPTS) $diffopts

-    set flist {}
-    catch {unset currentfile}
-    catch {unset currenthunk}
-    catch {unset filelines}
-    catch {unset groupfilenum}
-    catch {unset grouphunks}
-    set groupfilelast -1
-    foreach p $parents($diffmergeid) {
-       set cmd [list | git-diff-tree -p $p $diffmergeid]
-       set cmd [concat $cmd $mergefilelist($diffmergeid)]
-       if {[catch {set f [open $cmd r]} err]} {
-           error_popup "Error getting diffs: $err"
-           foreach f $flist {
-               catch {close $f}
-           }
-           return
-       }
-       lappend flist $f
-       set ids [list $diffmergeid $p]
-       set mergefds($ids) $f
-       set diffinhunk($ids) 0
-       set diffblocked($ids) 0
-       fconfigure $f -blocking 0
-       fileevent $f readable [list getmergediffline $f $ids $diffmergeid]
+    set cmd [concat | git-diff-tree --no-commit-id --cc $id]
+    if {[catch {set mdf [open $cmd r]} err]} {
+       error_popup "Error getting merge diffs: $err"
+       return

     }
     }

+    fconfigure $mdf -blocking 0
+    set mdifffd($id) $mdf
+    fileevent $mdf readable [list getmergediffline $mdf $id]
+    set nextupdate [expr {[clock clicks -milliseconds] + 100}]

 }
 
 }
 

-proc getmergediffline {f ids id} {
-    global diffmergeid diffinhunk diffoldlines diffnewlines
-    global currentfile currenthunk
-    global diffoldstart diffnewstart diffoldlno diffnewlno
-    global diffblocked mergefilelist
-    global noldlines nnewlines difflcounts filelines
+proc getmergediffline {mdf id} {
+    global diffmergeid ctext cflist nextupdate nparents mergemax
+    global difffilestart

 
 

-    set n [gets $f line]
+    set n [gets $mdf line]

     if {$n < 0} {
     if {$n < 0} {

-       if {![eof $f]} return
-    }
-
-    if {!([info exists diffmergeid] && $diffmergeid == $id)} {
-       if {$n < 0} {
-           close $f
+       if {[eof $mdf]} {
+           close $mdf

        }
        return
     }
        }
        return
     }

-
-    if {$diffinhunk($ids) != 0} {
-       set fi $currentfile($ids)
-       if {$n > 0 && [regexp {^[-+ \\]} $line match]} {
-           # continuing an existing hunk
-           set line [string range $line 1 end]
-           set p [lindex $ids 1]
-           if {$match eq "-" || $match eq " "} {
-               set filelines($p,$fi,$diffoldlno($ids)) $line
-               incr diffoldlno($ids)
-           }
-           if {$match eq "+" || $match eq " "} {
-               set filelines($id,$fi,$diffnewlno($ids)) $line
-               incr diffnewlno($ids)
-           }
-           if {$match eq " "} {
-               if {$diffinhunk($ids) == 2} {
-                   lappend difflcounts($ids) \
-                       [list $noldlines($ids) $nnewlines($ids)]
-                   set noldlines($ids) 0
-                   set diffinhunk($ids) 1
-               }
-               incr noldlines($ids)
-           } elseif {$match eq "-" || $match eq "+"} {
-               if {$diffinhunk($ids) == 1} {
-                   lappend difflcounts($ids) [list $noldlines($ids)]
-                   set noldlines($ids) 0
-                   set nnewlines($ids) 0
-                   set diffinhunk($ids) 2
-               }
-               if {$match eq "-"} {
-                   incr noldlines($ids)
-               } else {
-                   incr nnewlines($ids)
-               }
-           }
-           # and if it's \ No newline at end of line, then what?
-           return
-       }
-       # end of a hunk
-       if {$diffinhunk($ids) == 1 && $noldlines($ids) != 0} {
-           lappend difflcounts($ids) [list $noldlines($ids)]
-       } elseif {$diffinhunk($ids) == 2
-                 && ($noldlines($ids) != 0 || $nnewlines($ids) != 0)} {
-           lappend difflcounts($ids) [list $noldlines($ids) $nnewlines($ids)]
-       }
-       set currenthunk($ids) [list $currentfile($ids) \
-                                  $diffoldstart($ids) $diffnewstart($ids) \
-                                  $diffoldlno($ids) $diffnewlno($ids) \
-                                  $difflcounts($ids)]
-       set diffinhunk($ids) 0
-       # -1 = need to block, 0 = unblocked, 1 = is blocked
-       set diffblocked($ids) -1
-       processhunks
-       if {$diffblocked($ids) == -1} {
-           fileevent $f readable {}
-           set diffblocked($ids) 1
-       }
-    }
-
-    if {$n < 0} {
-       # eof
-       if {!$diffblocked($ids)} {
-           close $f
-           set currentfile($ids) [llength $mergefilelist($diffmergeid)]
-           set currenthunk($ids) [list $currentfile($ids) 0 0 0 0 {}]
-           processhunks
-       }
-    } elseif {[regexp {^diff --git a/(.*) b/} $line match fname]} {
-       # start of a new file
-       set currentfile($ids) \
-           [lsearch -exact $mergefilelist($diffmergeid) $fname]
-    } elseif {[regexp {^@@ -([0-9]+),([0-9]+) \+([0-9]+),([0-9]+) @@(.*)} \
-                  $line match f1l f1c f2l f2c rest]} {
-       if {[info exists currentfile($ids)] && $currentfile($ids) >= 0} {
-           # start of a new hunk
-           if {$f1l == 0 && $f1c == 0} {
-               set f1l 1
-           }
-           if {$f2l == 0 && $f2c == 0} {
-               set f2l 1
-           }
-           set diffinhunk($ids) 1
-           set diffoldstart($ids) $f1l
-           set diffnewstart($ids) $f2l
-           set diffoldlno($ids) $f1l
-           set diffnewlno($ids) $f2l
-           set difflcounts($ids) {}
-           set noldlines($ids) 0
-           set nnewlines($ids) 0
-       }
-    }
-}
-
-proc processhunks {} {
-    global diffmergeid parents nparents currenthunk
-    global mergefilelist diffblocked mergefds
-    global grouphunks grouplinestart grouplineend groupfilenum
-
-    set nfiles [llength $mergefilelist($diffmergeid)]
-    while 1 {
-       set fi $nfiles
-       set lno 0
-       # look for the earliest hunk
-       foreach p $parents($diffmergeid) {
-           set ids [list $diffmergeid $p]
-           if {![info exists currenthunk($ids)]} return
-           set i [lindex $currenthunk($ids) 0]
-           set l [lindex $currenthunk($ids) 2]
-           if {$i < $fi || ($i == $fi && $l < $lno)} {
-               set fi $i
-               set lno $l
-               set pi $p
-           }
-       }
-
-       if {$fi < $nfiles} {
-           set ids [list $diffmergeid $pi]
-           set hunk $currenthunk($ids)
-           unset currenthunk($ids)
-           if {$diffblocked($ids) > 0} {
-               fileevent $mergefds($ids) readable \
-                   [list getmergediffline $mergefds($ids) $ids $diffmergeid]
-           }
-           set diffblocked($ids) 0
-
-           if {[info exists groupfilenum] && $groupfilenum == $fi
-               && $lno <= $grouplineend} {
-               # add this hunk to the pending group
-               lappend grouphunks($pi) $hunk
-               set endln [lindex $hunk 4]
-               if {$endln > $grouplineend} {
-                   set grouplineend $endln
-               }
-               continue
-           }
-       }
-
-       # succeeding stuff doesn't belong in this group, so
-       # process the group now
-       if {[info exists groupfilenum]} {
-           processgroup
-           unset groupfilenum
-           unset grouphunks
-       }
-
-       if {$fi >= $nfiles} break
-
-       # start a new group
-       set groupfilenum $fi
-       set grouphunks($pi) [list $hunk]
-       set grouplinestart $lno
-       set grouplineend [lindex $hunk 4]
+    if {![info exists diffmergeid] || $id != $diffmergeid} {
+       return

     }
     }

-}
-
-proc processgroup {} {
-    global groupfilelast groupfilenum difffilestart
-    global mergefilelist diffmergeid ctext filelines
-    global parents diffmergeid diffoffset
-    global grouphunks grouplinestart grouplineend nparents
-    global mergemax
-

     $ctext conf -state normal
     $ctext conf -state normal

-    set id $diffmergeid
-    set f $groupfilenum
-    if {$groupfilelast != $f} {
+    if {[regexp {^diff --cc (.*)} $line match fname]} {
+       # start of a new file

        $ctext insert end "\n"
        set here [$ctext index "end - 1c"]
        $ctext insert end "\n"
        set here [$ctext index "end - 1c"]

-       set difffilestart($f) $here
-       set mark fmark.[expr {$f + 1}]
-       $ctext mark set $mark $here
-       $ctext mark gravity $mark left
-       set header [lindex $mergefilelist($id) $f]
-       set l [expr {(78 - [string length $header]) / 2}]
+       set i [$cflist index end]
+       $ctext mark set fmark.$i $here
+       $ctext mark gravity fmark.$i left
+       set difffilestart([expr {$i-1}]) $here
+       $cflist insert end $fname
+       set l [expr {(78 - [string length $fname]) / 2}]

        set pad [string range "----------------------------------------" 1 $l]
        set pad [string range "----------------------------------------" 1 $l]

-       $ctext insert end "$pad $header $pad\n" filesep
-       set groupfilelast $f
-       foreach p $parents($id) {
-           set diffoffset($p) 0
-       }
-    }
-
-    $ctext insert end "@@" msep
-    set nlines [expr {$grouplineend - $grouplinestart}]
-    set events {}
-    set pnum 0
-    foreach p $parents($id) {
-       set startline [expr {$grouplinestart + $diffoffset($p)}]
-       set ol $startline
-       set nl $grouplinestart
-       if {[info exists grouphunks($p)]} {
-           foreach h $grouphunks($p) {
-               set l [lindex $h 2]
-               if {$nl < $l} {
-                   for {} {$nl < $l} {incr nl} {
-                       set filelines($p,$f,$ol) $filelines($id,$f,$nl)
-                       incr ol
-                   }
-               }
-               foreach chunk [lindex $h 5] {
-                   if {[llength $chunk] == 2} {
-                       set olc [lindex $chunk 0]
-                       set nlc [lindex $chunk 1]
-                       set nnl [expr {$nl + $nlc}]
-                       lappend events [list $nl $nnl $pnum $olc $nlc]
-                       incr ol $olc
-                       set nl $nnl
-                   } else {
-                       incr ol [lindex $chunk 0]
-                       incr nl [lindex $chunk 0]
-                   }
-               }
-           }
-       }
-       if {$nl < $grouplineend} {
-           for {} {$nl < $grouplineend} {incr nl} {
-               set filelines($p,$f,$ol) $filelines($id,$f,$nl)
-               incr ol
-           }
-       }
-       set nlines [expr {$ol - $startline}]
-       $ctext insert end " -$startline,$nlines" msep
-       incr pnum
-    }
-
-    set nlines [expr {$grouplineend - $grouplinestart}]
-    $ctext insert end " +$grouplinestart,$nlines @@\n" msep
-
-    set events [lsort -integer -index 0 $events]
-    set nevents [llength $events]
-    set nmerge $nparents($diffmergeid)
-    set l $grouplinestart
-    for {set i 0} {$i < $nevents} {set i $j} {
-       set nl [lindex $events $i 0]
-       while {$l < $nl} {
-           $ctext insert end " $filelines($id,$f,$l)\n"
-           incr l
-       }
-       set e [lindex $events $i]
-       set enl [lindex $e 1]
-       set j $i
-       set active {}
-       while 1 {
-           set pnum [lindex $e 2]
-           set olc [lindex $e 3]
-           set nlc [lindex $e 4]
-           if {![info exists delta($pnum)]} {
-               set delta($pnum) [expr {$olc - $nlc}]
-               lappend active $pnum
+       $ctext insert end "$pad $fname $pad\n" filesep
+    } elseif {[regexp {^@@} $line]} {
+       $ctext insert end "$line\n" hunksep
+    } elseif {[regexp {^[0-9a-f]{40}$} $line] || [regexp {^index} $line]} {
+       # do nothing
+    } else {
+       # parse the prefix - one ' ', '-' or '+' for each parent
+       set np $nparents($id)
+       set spaces {}
+       set minuses {}
+       set pluses {}
+       set isbad 0
+       for {set j 0} {$j < $np} {incr j} {
+           set c [string range $line $j $j]
+           if {$c == " "} {
+               lappend spaces $j
+           } elseif {$c == "-"} {
+               lappend minuses $j
+           } elseif {$c == "+"} {
+               lappend pluses $j

            } else {
            } else {

-               incr delta($pnum) [expr {$olc - $nlc}]
-           }
-           if {[incr j] >= $nevents} break
-           set e [lindex $events $j]
-           if {[lindex $e 0] >= $enl} break
-           if {[lindex $e 1] > $enl} {
-               set enl [lindex $e 1]
-           }
-       }
-       set nlc [expr {$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 < $mergemax} {
-                       lappend ncol m$pnum
-                   } else {
-                       lappend ncol mmax
-                   }
-                   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 isbad 1
+               break

            }
        }
            }
        }

-       set pnum -1
-       foreach p $parents($id) {
-           incr pnum
-           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)
-           unset delta($pnum)
-           for {} {$olc > 0} {incr olc -1} {
-               $ctext insert end "-$filelines($p,$f,$ol)\n" m$pnum
-               incr ol
-           }
-       }
-       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,$l)\n" mresult
-               }
-           }
+       set tags {}
+       set num {}
+       if {!$isbad && $minuses ne {} && $pluses eq {}} {
+           # line doesn't appear in result, parents in $minuses have the line
+           set num [lindex $minuses 0]
+       } elseif {!$isbad && $pluses ne {} && $minuses eq {}} {
+           # line appears in result, parents in $pluses don't have the line
+           lappend tags mresult
+           set num [lindex $spaces 0]

        }
        }

-       for {} {$l < $endl} {incr l} {
-           $ctext insert end "+$filelines($id,$f,$l)\n" $ncol
+       if {$num ne {}} {
+           if {$num >= $mergemax} {
+               set num "max"
+           }
+           lappend tags m$num

        }
        }

-    }
-    while {$l < $grouplineend} {
-       $ctext insert end " $filelines($id,$f,$l)\n"
-       incr l
+       $ctext insert end "$line\n" $tags

     }
     $ctext conf -state disabled
     }
     $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
+    if {[clock clicks -milliseconds] >= $nextupdate} {
+       incr nextupdate 100
+       fileevent $mdf readable {}
+       update
+       fileevent $mdf readable [list getmergediffline $mdf $id]

     }
     }

-    return [expr {200 * $same / (2 * $same + $diff)}]

 }
 
 proc startdiff {ids} {
 }
 
 proc startdiff {ids} {


@@ -2804,9 +2496,9 @@ proc gettreediffs {ids} {
     global treediff parents treepending
     set treepending $ids
     set treediff {}
     global treediff parents treepending
     set treepending $ids
     set treediff {}

-    set id [lindex $ids 0]
-    set p [lindex $ids 1]
-    if [catch {set gdtf [open "|git-diff-tree -r $id" r]}] return
+    if {[catch \
+        {set gdtf [open [concat | git-diff-tree --no-commit-id -r $ids] r]} \
+       ]} return

     fconfigure $gdtf -blocking 0
     fileevent $gdtf readable [list gettreediffline $gdtf $ids]
 }
     fconfigure $gdtf -blocking 0
     fileevent $gdtf readable [list gettreediffline $gdtf $ids]
 }


@@ -2839,10 +2531,8 @@ proc getblobdiffs {ids} {
     global diffopts blobdifffd diffids env curdifftag curtagstart
     global difffilestart nextupdate diffinhdr treediffs
 
     global diffopts blobdifffd diffids env curdifftag curtagstart
     global difffilestart nextupdate diffinhdr treediffs
 

-    set id [lindex $ids 0]
-    set p [lindex $ids 1]

     set env(GIT_DIFF_OPTS) $diffopts
     set env(GIT_DIFF_OPTS) $diffopts

-    set cmd [list | git-diff-tree -r -p -C $id]
+    set cmd [concat | git-diff-tree --no-commit-id -r -p -C $ids]

     if {[catch {set bdf [open $cmd r]} err]} {
        puts "error getting diffs: $err"
        return
     if {[catch {set bdf [open $cmd r]} err]} {
        puts "error getting diffs: $err"
        return


@@ -2861,7 +2551,6 @@ proc getblobdiffline {bdf ids} {
     global diffids blobdifffd ctext curdifftag curtagstart
     global diffnexthead diffnextnote difffilestart
     global nextupdate diffinhdr treediffs
     global diffids blobdifffd ctext curdifftag curtagstart
     global diffnexthead diffnextnote difffilestart
     global nextupdate diffinhdr treediffs

-    global gaudydiff

 
     set n [gets $bdf line]
     if {$n < 0} {
 
     set n [gets $bdf line]
     if {$n < 0} {


@@ -2910,26 +2599,14 @@ proc getblobdiffline {bdf ids} {
        set diffinhdr 0
     } elseif {[regexp {^@@ -([0-9]+),([0-9]+) \+([0-9]+),([0-9]+) @@(.*)} \
                   $line match f1l f1c f2l f2c rest]} {
        set diffinhdr 0
     } elseif {[regexp {^@@ -([0-9]+),([0-9]+) \+([0-9]+),([0-9]+) @@(.*)} \
                   $line match f1l f1c f2l f2c rest]} {

-       if {$gaudydiff} {
-           $ctext insert end "\t" hunksep
-           $ctext insert end "    $f1l    " d0 "    $f2l    " d1
-           $ctext insert end "    $rest \n" hunksep
-       } else {
-           $ctext insert end "$line\n" hunksep
-       }
+       $ctext insert end "$line\n" hunksep

        set diffinhdr 0
     } else {
        set x [string range $line 0 0]
        if {$x == "-" || $x == "+"} {
            set tag [expr {$x == "+"}]
        set diffinhdr 0
     } else {
        set x [string range $line 0 0]
        if {$x == "-" || $x == "+"} {
            set tag [expr {$x == "+"}]

-           if {$gaudydiff} {
-               set line [string range $line 1 end]
-           }

            $ctext insert end "$line\n" d$tag
        } elseif {$x == " "} {
            $ctext insert end "$line\n" d$tag
        } elseif {$x == " "} {

-           if {$gaudydiff} {
-               set line [string range $line 1 end]
-           }

            $ctext insert end "$line\n"
        } elseif {$diffinhdr || $x == "\\"} {
            # e.g. "\ No newline at end of file"
            $ctext insert end "$line\n"
        } elseif {$diffinhdr || $x == "\\"} {
            # e.g. "\ No newline at end of file"


@@ -2985,8 +2662,8 @@ proc setcoords {} {
 
     set linespc [font metrics $mainfont -linespace]
     set charspc [font measure $mainfont "m"]
 
     set linespc [font metrics $mainfont -linespace]
     set charspc [font measure $mainfont "m"]

-    set canvy0 [expr 3 + 0.5 * $linespc]
-    set canvx0 [expr 3 + 0.5 * $linespc]
+    set canvy0 [expr {3 + 0.5 * $linespc}]
+    set canvx0 [expr {3 + 0.5 * $linespc}]

     set lthickness [expr {int($linespc / 9) + 1}]
     set xspc1(0) $linespc
     set xspc2 $linespc
     set lthickness [expr {int($linespc / 9) + 1}]
     set xspc1(0) $linespc
     set xspc2 $linespc


@@ -3143,7 +2820,7 @@ proc linehover {} {
     set t [$canv create rectangle $x0 $y0 $x1 $y1 \
               -fill \#ffff80 -outline black -width 1 -tags hover]
     $canv raise $t
     set t [$canv create rectangle $x0 $y0 $x1 $y1 \
               -fill \#ffff80 -outline black -width 1 -tags hover]
     $canv raise $t

-    set t [$canv create text $x $y -anchor nw -text $text -tags hover]
+    set t [$canv create text $x $y -anchor nw -text $text -tags hover -font $mainfont]

     $canv raise $t
 }
 
     $canv raise $t
 }
 


@@ -3178,7 +2855,7 @@ proc clickisonarrow {id y} {
 }
 
 proc arrowjump {id dirn y} {
 }
 
 proc arrowjump {id dirn y} {

-    global mainline sidelines canv
+    global mainline sidelines canv canv2 canv3

 
     set yt {}
     if {$dirn eq "down"} {
 
     set yt {}
     if {$dirn eq "down"} {


@@ -3216,6 +2893,8 @@ proc arrowjump {id dirn y} {
        set yfrac 0
     }
     $canv yview moveto $yfrac
        set yfrac 0
     }
     $canv yview moveto $yfrac

+    $canv2 yview moveto $yfrac
+    $canv3 yview moveto $yfrac

 }
 
 proc lineclick {x y id isnew} {
 }
 
 proc lineclick {x y id isnew} {


@@ -3226,7 +2905,7 @@ proc lineclick {x y id isnew} {
     normalline
     $canv delete hover
     # draw this line thicker than normal
     normalline
     $canv delete hover
     # draw this line thicker than normal

-    drawlines $id 1
+    drawlines $id 1 1

     set thickerline $id
     if {$isnew} {
        set ymax [lindex [$canv cget -scrollregion] 3]
     set thickerline $id
     if {$isnew} {
        set ymax [lindex [$canv cget -scrollregion] 3]


@@ -3255,7 +2934,8 @@ proc lineclick {x y id isnew} {
     set info $commitinfo($id)
     $ctext insert end "\n\t[lindex $info 0]\n"
     $ctext insert end "\tAuthor:\t[lindex $info 1]\n"
     set info $commitinfo($id)
     $ctext insert end "\n\t[lindex $info 0]\n"
     $ctext insert end "\tAuthor:\t[lindex $info 1]\n"

-    $ctext insert end "\tDate:\t[lindex $info 2]\n"
+    set date [formatdate [lindex $info 2]]
+    $ctext insert end "\tDate:\t$date\n"

     if {[info exists children($id)]} {
        $ctext insert end "\nChildren:"
        set i 0
     if {[info exists children($id)]} {
        $ctext insert end "\nChildren:"
        set i 0


@@ -3267,7 +2947,8 @@ proc lineclick {x y id isnew} {
            $ctext tag bind link$i <1> [list selbyid $child]
            $ctext insert end "\n\t[lindex $info 0]"
            $ctext insert end "\n\tAuthor:\t[lindex $info 1]"
            $ctext tag bind link$i <1> [list selbyid $child]
            $ctext insert end "\n\t[lindex $info 0]"
            $ctext insert end "\n\tAuthor:\t[lindex $info 1]"

-           $ctext insert end "\n\tDate:\t[lindex $info 2]\n"
+           set date [formatdate [lindex $info 2]]
+           $ctext insert end "\n\tDate:\t$date\n"

        }
     }
     $ctext conf -state disabled
        }
     }
     $ctext conf -state disabled


@@ -3278,7 +2959,7 @@ proc lineclick {x y id isnew} {
 proc normalline {} {
     global thickerline
     if {[info exists thickerline]} {
 proc normalline {} {
     global thickerline
     if {[info exists thickerline]} {

-       drawlines $thickerline 0
+       drawlines $thickerline 0 1

        unset thickerline
     }
 }
        unset thickerline
     }
 }


@@ -3355,7 +3036,7 @@ proc doseldiff {oldid newid} {
     $ctext conf -state disabled
     $ctext tag delete Comments
     $ctext tag remove found 1.0 end
     $ctext conf -state disabled
     $ctext tag delete Comments
     $ctext tag remove found 1.0 end

-    startdiff [list $newid $oldid]
+    startdiff [list $oldid $newid]

 }
 
 proc mkpatch {} {
 }
 
 proc mkpatch {} {


@@ -3611,9 +3292,6 @@ proc rereadrefs {} {
            set ref($id) [listrefs $id]
        }
     }
            set ref($id) [listrefs $id]
        }
     }

-    foreach v {tagids idtags headids idheads otherrefids idotherrefs} {
-       catch {unset $v}
-    }

     readrefs
     set refids [lsort -unique [concat $refids [array names idtags] \
                        [array names idheads] [array names idotherrefs]]]
     readrefs
     set refids [lsort -unique [concat $refids [array names idtags] \
                        [array names idheads] [array names idotherrefs]]]


@@ -3650,34 +3328,390 @@ proc doquit {} {
     destroy .
 }
 
     destroy .
 }
 

+proc doprefs {} {
+    global maxwidth maxgraphpct diffopts findmergefiles
+    global oldprefs prefstop
+
+    set top .gitkprefs
+    set prefstop $top
+    if {[winfo exists $top]} {
+       raise $top
+       return
+    }
+    foreach v {maxwidth maxgraphpct diffopts findmergefiles} {
+       set oldprefs($v) [set $v]
+    }
+    toplevel $top
+    wm title $top "Gitk preferences"
+    label $top.ldisp -text "Commit list display options"
+    grid $top.ldisp - -sticky w -pady 10
+    label $top.spacer -text " "
+    label $top.maxwidthl -text "Maximum graph width (lines)" \
+       -font optionfont
+    spinbox $top.maxwidth -from 0 -to 100 -width 4 -textvariable maxwidth
+    grid $top.spacer $top.maxwidthl $top.maxwidth -sticky w
+    label $top.maxpctl -text "Maximum graph width (% of pane)" \
+       -font optionfont
+    spinbox $top.maxpct -from 1 -to 100 -width 4 -textvariable maxgraphpct
+    grid x $top.maxpctl $top.maxpct -sticky w
+    checkbutton $top.findm -variable findmergefiles
+    label $top.findml -text "Include merges for \"Find\" in \"Files\"" \
+       -font optionfont
+    grid $top.findm $top.findml - -sticky w
+    label $top.ddisp -text "Diff display options"
+    grid $top.ddisp - -sticky w -pady 10
+    label $top.diffoptl -text "Options for diff program" \
+       -font optionfont
+    entry $top.diffopt -width 20 -textvariable diffopts
+    grid x $top.diffoptl $top.diffopt -sticky w
+    frame $top.buts
+    button $top.buts.ok -text "OK" -command prefsok
+    button $top.buts.can -text "Cancel" -command prefscan
+    grid $top.buts.ok $top.buts.can
+    grid columnconfigure $top.buts 0 -weight 1 -uniform a
+    grid columnconfigure $top.buts 1 -weight 1 -uniform a
+    grid $top.buts - - -pady 10 -sticky ew
+}
+
+proc prefscan {} {
+    global maxwidth maxgraphpct diffopts findmergefiles
+    global oldprefs prefstop
+
+    foreach v {maxwidth maxgraphpct diffopts findmergefiles} {
+       set $v $oldprefs($v)
+    }
+    catch {destroy $prefstop}
+    unset prefstop
+}
+
+proc prefsok {} {
+    global maxwidth maxgraphpct
+    global oldprefs prefstop
+
+    catch {destroy $prefstop}
+    unset prefstop
+    if {$maxwidth != $oldprefs(maxwidth)
+       || $maxgraphpct != $oldprefs(maxgraphpct)} {
+       redisplay
+    }
+}
+
+proc formatdate {d} {
+    return [clock format $d -format "%Y-%m-%d %H:%M:%S"]
+}
+
+# This list of encoding names and aliases is distilled from
+# http://www.iana.org/assignments/character-sets.
+# Not all of them are supported by Tcl.
+set encoding_aliases {
+    { ANSI_X3.4-1968 iso-ir-6 ANSI_X3.4-1986 ISO_646.irv:1991 ASCII
+      ISO646-US US-ASCII us IBM367 cp367 csASCII }
+    { ISO-10646-UTF-1 csISO10646UTF1 }
+    { ISO_646.basic:1983 ref csISO646basic1983 }
+    { INVARIANT csINVARIANT }
+    { ISO_646.irv:1983 iso-ir-2 irv csISO2IntlRefVersion }
+    { BS_4730 iso-ir-4 ISO646-GB gb uk csISO4UnitedKingdom }
+    { NATS-SEFI iso-ir-8-1 csNATSSEFI }
+    { NATS-SEFI-ADD iso-ir-8-2 csNATSSEFIADD }
+    { NATS-DANO iso-ir-9-1 csNATSDANO }
+    { NATS-DANO-ADD iso-ir-9-2 csNATSDANOADD }
+    { SEN_850200_B iso-ir-10 FI ISO646-FI ISO646-SE se csISO10Swedish }
+    { SEN_850200_C iso-ir-11 ISO646-SE2 se2 csISO11SwedishForNames }
+    { KS_C_5601-1987 iso-ir-149 KS_C_5601-1989 KSC_5601 korean csKSC56011987 }
+    { ISO-2022-KR csISO2022KR }
+    { EUC-KR csEUCKR }
+    { ISO-2022-JP csISO2022JP }
+    { ISO-2022-JP-2 csISO2022JP2 }
+    { JIS_C6220-1969-jp JIS_C6220-1969 iso-ir-13 katakana x0201-7
+      csISO13JISC6220jp }
+    { JIS_C6220-1969-ro iso-ir-14 jp ISO646-JP csISO14JISC6220ro }
+    { IT iso-ir-15 ISO646-IT csISO15Italian }
+    { PT iso-ir-16 ISO646-PT csISO16Portuguese }
+    { ES iso-ir-17 ISO646-ES csISO17Spanish }
+    { greek7-old iso-ir-18 csISO18Greek7Old }
+    { latin-greek iso-ir-19 csISO19LatinGreek }
+    { DIN_66003 iso-ir-21 de ISO646-DE csISO21German }
+    { NF_Z_62-010_(1973) iso-ir-25 ISO646-FR1 csISO25French }
+    { Latin-greek-1 iso-ir-27 csISO27LatinGreek1 }
+    { ISO_5427 iso-ir-37 csISO5427Cyrillic }
+    { JIS_C6226-1978 iso-ir-42 csISO42JISC62261978 }
+    { BS_viewdata iso-ir-47 csISO47BSViewdata }
+    { INIS iso-ir-49 csISO49INIS }
+    { INIS-8 iso-ir-50 csISO50INIS8 }
+    { INIS-cyrillic iso-ir-51 csISO51INISCyrillic }
+    { ISO_5427:1981 iso-ir-54 ISO5427Cyrillic1981 }
+    { ISO_5428:1980 iso-ir-55 csISO5428Greek }
+    { GB_1988-80 iso-ir-57 cn ISO646-CN csISO57GB1988 }
+    { GB_2312-80 iso-ir-58 chinese csISO58GB231280 }
+    { NS_4551-1 iso-ir-60 ISO646-NO no csISO60DanishNorwegian
+      csISO60Norwegian1 }
+    { NS_4551-2 ISO646-NO2 iso-ir-61 no2 csISO61Norwegian2 }
+    { NF_Z_62-010 iso-ir-69 ISO646-FR fr csISO69French }
+    { videotex-suppl iso-ir-70 csISO70VideotexSupp1 }
+    { PT2 iso-ir-84 ISO646-PT2 csISO84Portuguese2 }
+    { ES2 iso-ir-85 ISO646-ES2 csISO85Spanish2 }
+    { MSZ_7795.3 iso-ir-86 ISO646-HU hu csISO86Hungarian }
+    { JIS_C6226-1983 iso-ir-87 x0208 JIS_X0208-1983 csISO87JISX0208 }
+    { greek7 iso-ir-88 csISO88Greek7 }
+    { ASMO_449 ISO_9036 arabic7 iso-ir-89 csISO89ASMO449 }
+    { iso-ir-90 csISO90 }
+    { JIS_C6229-1984-a iso-ir-91 jp-ocr-a csISO91JISC62291984a }
+    { JIS_C6229-1984-b iso-ir-92 ISO646-JP-OCR-B jp-ocr-b
+      csISO92JISC62991984b }
+    { JIS_C6229-1984-b-add iso-ir-93 jp-ocr-b-add csISO93JIS62291984badd }
+    { JIS_C6229-1984-hand iso-ir-94 jp-ocr-hand csISO94JIS62291984hand }
+    { JIS_C6229-1984-hand-add iso-ir-95 jp-ocr-hand-add
+      csISO95JIS62291984handadd }
+    { JIS_C6229-1984-kana iso-ir-96 csISO96JISC62291984kana }
+    { ISO_2033-1983 iso-ir-98 e13b csISO2033 }
+    { ANSI_X3.110-1983 iso-ir-99 CSA_T500-1983 NAPLPS csISO99NAPLPS }
+    { ISO_8859-1:1987 iso-ir-100 ISO_8859-1 ISO-8859-1 latin1 l1 IBM819
+      CP819 csISOLatin1 }
+    { ISO_8859-2:1987 iso-ir-101 ISO_8859-2 ISO-8859-2 latin2 l2 csISOLatin2 }
+    { T.61-7bit iso-ir-102 csISO102T617bit }
+    { T.61-8bit T.61 iso-ir-103 csISO103T618bit }
+    { ISO_8859-3:1988 iso-ir-109 ISO_8859-3 ISO-8859-3 latin3 l3 csISOLatin3 }
+    { ISO_8859-4:1988 iso-ir-110 ISO_8859-4 ISO-8859-4 latin4 l4 csISOLatin4 }
+    { ECMA-cyrillic iso-ir-111 KOI8-E csISO111ECMACyrillic }
+    { CSA_Z243.4-1985-1 iso-ir-121 ISO646-CA csa7-1 ca csISO121Canadian1 }
+    { CSA_Z243.4-1985-2 iso-ir-122 ISO646-CA2 csa7-2 csISO122Canadian2 }
+    { CSA_Z243.4-1985-gr iso-ir-123 csISO123CSAZ24341985gr }
+    { ISO_8859-6:1987 iso-ir-127 ISO_8859-6 ISO-8859-6 ECMA-114 ASMO-708
+      arabic csISOLatinArabic }
+    { ISO_8859-6-E csISO88596E ISO-8859-6-E }
+    { ISO_8859-6-I csISO88596I ISO-8859-6-I }
+    { ISO_8859-7:1987 iso-ir-126 ISO_8859-7 ISO-8859-7 ELOT_928 ECMA-118
+      greek greek8 csISOLatinGreek }
+    { T.101-G2 iso-ir-128 csISO128T101G2 }
+    { ISO_8859-8:1988 iso-ir-138 ISO_8859-8 ISO-8859-8 hebrew
+      csISOLatinHebrew }
+    { ISO_8859-8-E csISO88598E ISO-8859-8-E }
+    { ISO_8859-8-I csISO88598I ISO-8859-8-I }
+    { CSN_369103 iso-ir-139 csISO139CSN369103 }
+    { JUS_I.B1.002 iso-ir-141 ISO646-YU js yu csISO141JUSIB1002 }
+    { ISO_6937-2-add iso-ir-142 csISOTextComm }
+    { IEC_P27-1 iso-ir-143 csISO143IECP271 }
+    { ISO_8859-5:1988 iso-ir-144 ISO_8859-5 ISO-8859-5 cyrillic
+      csISOLatinCyrillic }
+    { JUS_I.B1.003-serb iso-ir-146 serbian csISO146Serbian }
+    { JUS_I.B1.003-mac macedonian iso-ir-147 csISO147Macedonian }
+    { ISO_8859-9:1989 iso-ir-148 ISO_8859-9 ISO-8859-9 latin5 l5 csISOLatin5 }
+    { greek-ccitt iso-ir-150 csISO150 csISO150GreekCCITT }
+    { NC_NC00-10:81 cuba iso-ir-151 ISO646-CU csISO151Cuba }
+    { ISO_6937-2-25 iso-ir-152 csISO6937Add }
+    { GOST_19768-74 ST_SEV_358-88 iso-ir-153 csISO153GOST1976874 }
+    { ISO_8859-supp iso-ir-154 latin1-2-5 csISO8859Supp }
+    { ISO_10367-box iso-ir-155 csISO10367Box }
+    { ISO-8859-10 iso-ir-157 l6 ISO_8859-10:1992 csISOLatin6 latin6 }
+    { latin-lap lap iso-ir-158 csISO158Lap }
+    { JIS_X0212-1990 x0212 iso-ir-159 csISO159JISX02121990 }
+    { DS_2089 DS2089 ISO646-DK dk csISO646Danish }
+    { us-dk csUSDK }
+    { dk-us csDKUS }
+    { JIS_X0201 X0201 csHalfWidthKatakana }
+    { KSC5636 ISO646-KR csKSC5636 }
+    { ISO-10646-UCS-2 csUnicode }
+    { ISO-10646-UCS-4 csUCS4 }
+    { DEC-MCS dec csDECMCS }
+    { hp-roman8 roman8 r8 csHPRoman8 }
+    { macintosh mac csMacintosh }
+    { IBM037 cp037 ebcdic-cp-us ebcdic-cp-ca ebcdic-cp-wt ebcdic-cp-nl
+      csIBM037 }
+    { IBM038 EBCDIC-INT cp038 csIBM038 }
+    { IBM273 CP273 csIBM273 }
+    { IBM274 EBCDIC-BE CP274 csIBM274 }
+    { IBM275 EBCDIC-BR cp275 csIBM275 }
+    { IBM277 EBCDIC-CP-DK EBCDIC-CP-NO csIBM277 }
+    { IBM278 CP278 ebcdic-cp-fi ebcdic-cp-se csIBM278 }
+    { IBM280 CP280 ebcdic-cp-it csIBM280 }
+    { IBM281 EBCDIC-JP-E cp281 csIBM281 }
+    { IBM284 CP284 ebcdic-cp-es csIBM284 }
+    { IBM285 CP285 ebcdic-cp-gb csIBM285 }
+    { IBM290 cp290 EBCDIC-JP-kana csIBM290 }
+    { IBM297 cp297 ebcdic-cp-fr csIBM297 }
+    { IBM420 cp420 ebcdic-cp-ar1 csIBM420 }
+    { IBM423 cp423 ebcdic-cp-gr csIBM423 }
+    { IBM424 cp424 ebcdic-cp-he csIBM424 }
+    { IBM437 cp437 437 csPC8CodePage437 }
+    { IBM500 CP500 ebcdic-cp-be ebcdic-cp-ch csIBM500 }
+    { IBM775 cp775 csPC775Baltic }
+    { IBM850 cp850 850 csPC850Multilingual }
+    { IBM851 cp851 851 csIBM851 }
+    { IBM852 cp852 852 csPCp852 }
+    { IBM855 cp855 855 csIBM855 }
+    { IBM857 cp857 857 csIBM857 }
+    { IBM860 cp860 860 csIBM860 }
+    { IBM861 cp861 861 cp-is csIBM861 }
+    { IBM862 cp862 862 csPC862LatinHebrew }
+    { IBM863 cp863 863 csIBM863 }
+    { IBM864 cp864 csIBM864 }
+    { IBM865 cp865 865 csIBM865 }
+    { IBM866 cp866 866 csIBM866 }
+    { IBM868 CP868 cp-ar csIBM868 }
+    { IBM869 cp869 869 cp-gr csIBM869 }
+    { IBM870 CP870 ebcdic-cp-roece ebcdic-cp-yu csIBM870 }
+    { IBM871 CP871 ebcdic-cp-is csIBM871 }
+    { IBM880 cp880 EBCDIC-Cyrillic csIBM880 }
+    { IBM891 cp891 csIBM891 }
+    { IBM903 cp903 csIBM903 }
+    { IBM904 cp904 904 csIBBM904 }
+    { IBM905 CP905 ebcdic-cp-tr csIBM905 }
+    { IBM918 CP918 ebcdic-cp-ar2 csIBM918 }
+    { IBM1026 CP1026 csIBM1026 }
+    { EBCDIC-AT-DE csIBMEBCDICATDE }
+    { EBCDIC-AT-DE-A csEBCDICATDEA }
+    { EBCDIC-CA-FR csEBCDICCAFR }
+    { EBCDIC-DK-NO csEBCDICDKNO }
+    { EBCDIC-DK-NO-A csEBCDICDKNOA }
+    { EBCDIC-FI-SE csEBCDICFISE }
+    { EBCDIC-FI-SE-A csEBCDICFISEA }
+    { EBCDIC-FR csEBCDICFR }
+    { EBCDIC-IT csEBCDICIT }
+    { EBCDIC-PT csEBCDICPT }
+    { EBCDIC-ES csEBCDICES }
+    { EBCDIC-ES-A csEBCDICESA }
+    { EBCDIC-ES-S csEBCDICESS }
+    { EBCDIC-UK csEBCDICUK }
+    { EBCDIC-US csEBCDICUS }
+    { UNKNOWN-8BIT csUnknown8BiT }
+    { MNEMONIC csMnemonic }
+    { MNEM csMnem }
+    { VISCII csVISCII }
+    { VIQR csVIQR }
+    { KOI8-R csKOI8R }
+    { IBM00858 CCSID00858 CP00858 PC-Multilingual-850+euro }
+    { IBM00924 CCSID00924 CP00924 ebcdic-Latin9--euro }
+    { IBM01140 CCSID01140 CP01140 ebcdic-us-37+euro }
+    { IBM01141 CCSID01141 CP01141 ebcdic-de-273+euro }
+    { IBM01142 CCSID01142 CP01142 ebcdic-dk-277+euro ebcdic-no-277+euro }
+    { IBM01143 CCSID01143 CP01143 ebcdic-fi-278+euro ebcdic-se-278+euro }
+    { IBM01144 CCSID01144 CP01144 ebcdic-it-280+euro }
+    { IBM01145 CCSID01145 CP01145 ebcdic-es-284+euro }
+    { IBM01146 CCSID01146 CP01146 ebcdic-gb-285+euro }
+    { IBM01147 CCSID01147 CP01147 ebcdic-fr-297+euro }
+    { IBM01148 CCSID01148 CP01148 ebcdic-international-500+euro }
+    { IBM01149 CCSID01149 CP01149 ebcdic-is-871+euro }
+    { IBM1047 IBM-1047 }
+    { PTCP154 csPTCP154 PT154 CP154 Cyrillic-Asian }
+    { Amiga-1251 Ami1251 Amiga1251 Ami-1251 }
+    { UNICODE-1-1 csUnicode11 }
+    { CESU-8 csCESU-8 }
+    { BOCU-1 csBOCU-1 }
+    { UNICODE-1-1-UTF-7 csUnicode11UTF7 }
+    { ISO-8859-14 iso-ir-199 ISO_8859-14:1998 ISO_8859-14 latin8 iso-celtic
+      l8 }
+    { ISO-8859-15 ISO_8859-15 Latin-9 }
+    { ISO-8859-16 iso-ir-226 ISO_8859-16:2001 ISO_8859-16 latin10 l10 }
+    { GBK CP936 MS936 windows-936 }
+    { JIS_Encoding csJISEncoding }
+    { Shift_JIS MS_Kanji csShiftJIS }
+    { Extended_UNIX_Code_Packed_Format_for_Japanese csEUCPkdFmtJapanese
+      EUC-JP }
+    { Extended_UNIX_Code_Fixed_Width_for_Japanese csEUCFixWidJapanese }
+    { ISO-10646-UCS-Basic csUnicodeASCII }
+    { ISO-10646-Unicode-Latin1 csUnicodeLatin1 ISO-10646 }
+    { ISO-Unicode-IBM-1261 csUnicodeIBM1261 }
+    { ISO-Unicode-IBM-1268 csUnicodeIBM1268 }
+    { ISO-Unicode-IBM-1276 csUnicodeIBM1276 }
+    { ISO-Unicode-IBM-1264 csUnicodeIBM1264 }
+    { ISO-Unicode-IBM-1265 csUnicodeIBM1265 }
+    { ISO-8859-1-Windows-3.0-Latin-1 csWindows30Latin1 }
+    { ISO-8859-1-Windows-3.1-Latin-1 csWindows31Latin1 }
+    { ISO-8859-2-Windows-Latin-2 csWindows31Latin2 }
+    { ISO-8859-9-Windows-Latin-5 csWindows31Latin5 }
+    { Adobe-Standard-Encoding csAdobeStandardEncoding }
+    { Ventura-US csVenturaUS }
+    { Ventura-International csVenturaInternational }
+    { PC8-Danish-Norwegian csPC8DanishNorwegian }
+    { PC8-Turkish csPC8Turkish }
+    { IBM-Symbols csIBMSymbols }
+    { IBM-Thai csIBMThai }
+    { HP-Legal csHPLegal }
+    { HP-Pi-font csHPPiFont }
+    { HP-Math8 csHPMath8 }
+    { Adobe-Symbol-Encoding csHPPSMath }
+    { HP-DeskTop csHPDesktop }
+    { Ventura-Math csVenturaMath }
+    { Microsoft-Publishing csMicrosoftPublishing }
+    { Windows-31J csWindows31J }
+    { GB2312 csGB2312 }
+    { Big5 csBig5 }
+}
+
+proc tcl_encoding {enc} {
+    global encoding_aliases
+    set names [encoding names]
+    set lcnames [string tolower $names]
+    set enc [string tolower $enc]
+    set i [lsearch -exact $lcnames $enc]
+    if {$i < 0} {
+       # look for "isonnn" instead of "iso-nnn" or "iso_nnn"
+       if {[regsub {^iso[-_]} $enc iso encx]} {
+           set i [lsearch -exact $lcnames $encx]
+       }
+    }
+    if {$i < 0} {
+       foreach l $encoding_aliases {
+           set ll [string tolower $l]
+           if {[lsearch -exact $ll $enc] < 0} continue
+           # look through the aliases for one that tcl knows about
+           foreach e $ll {
+               set i [lsearch -exact $lcnames $e]
+               if {$i < 0} {
+                   if {[regsub {^iso[-_]} $e iso ex]} {
+                       set i [lsearch -exact $lcnames $ex]
+                   }
+               }
+               if {$i >= 0} break
+           }
+           break
+       }
+    }
+    if {$i >= 0} {
+       return [lindex $names $i]
+    }
+    return {}
+}
+

 # defaults...
 set datemode 0
 # defaults...
 set datemode 0

-set boldnames 0

 set diffopts "-U 5 -p"
 set wrcomcmd "git-diff-tree --stdin -p --pretty"
 
 set diffopts "-U 5 -p"
 set wrcomcmd "git-diff-tree --stdin -p --pretty"
 

+set gitencoding {}
+catch {
+    set gitencoding [exec git-repo-config --get i18n.commitencoding]
+}
+if {$gitencoding == ""} {
+    set gitencoding "utf-8"
+}
+set tclencoding [tcl_encoding $gitencoding]
+if {$tclencoding == {}} {
+    puts stderr "Warning: encoding $gitencoding is not supported by Tcl/Tk"
+}
+

 set mainfont {Helvetica 9}
 set textfont {Courier 9}
 set findmergefiles 0
 set mainfont {Helvetica 9}
 set textfont {Courier 9}
 set findmergefiles 0

-set gaudydiff 0

 set maxgraphpct 50
 set maxwidth 16
 set maxgraphpct 50
 set maxwidth 16

+set revlistorder 0
+set fastdate 0

 
 set colors {green red blue magenta darkgrey brown orange}
 
 catch {source ~/.gitk}
 
 set namefont $mainfont
 
 set colors {green red blue magenta darkgrey brown orange}
 
 catch {source ~/.gitk}
 
 set namefont $mainfont

-if {$boldnames} {
-    lappend namefont bold
-}
+
+font create optionfont -family sans-serif -size -12

 
 set revtreeargs {}
 foreach arg $argv {
     switch -regexp -- $arg {
        "^$" { }
 
 set revtreeargs {}
 foreach arg $argv {
     switch -regexp -- $arg {
        "^$" { }

-       "^-b" { set boldnames 1 }

        "^-d" { set datemode 1 }
        "^-d" { set datemode 1 }

+       "^-r" { set revlistorder 1 }

        default {
            lappend revtreeargs $arg
        }
        default {
            lappend revtreeargs $arg
        }


@@ -3692,6 +3726,6 @@ set redisplaying 0
 set stuffsaved 0
 set patchnum 0
 setcoords
 set stuffsaved 0
 set patchnum 0
 setcoords

-makewindow
+makewindow $revtreeargs

 readrefs
 getcommits $revtreeargs
 readrefs
 getcommits $revtreeargs