gitk: Basic support for highlighting one view within another

With this, one view can be used as a highlight for another, so that
the commits that are in the highlight view are displayed in bold.
This required some fairly major changes to how the list of ids,
parents, children, and id to row mapping were stored for each view.
We can now be reading in several views at once; for all except the
current view, we just update the displayorder and the lists of parents
and children for the view.

This also creates a little bit of infrastructure for handling the
watch cursor.

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

diff --git a/gitk b/gitk
index f983deee8b7814d8e8ed8f13ceec63b75a5c03f8..a83a75485851c155be838be37f3b973f28cb6327 100755 (executable)
--- a/gitk
+++ b/gitk
@@ -16,75 +16,82 @@ proc gitdir {} {
     }
 }
 
-proc start_rev_list {} {
+proc start_rev_list {view} {
     global startmsecs nextupdate ncmupdate
     global commfd leftover tclencoding datemode
-    global revtreeargs curview viewfiles
+    global revtreeargs viewfiles commitidx
 
     set startmsecs [clock clicks -milliseconds]
     set nextupdate [expr {$startmsecs + 100}]
     set ncmupdate 1
-    initlayout
+    set commitidx($view) 0
     set args $revtreeargs
-    if {$viewfiles($curview) ne {}} {
-       set args [concat $args "--" $viewfiles($curview)]
+    if {$viewfiles($view) ne {}} {
+       set args [concat $args "--" $viewfiles($view)]
     }
     set order "--topo-order"
     if {$datemode} {
        set order "--date-order"
     }
     if {[catch {
-       set commfd [open [concat | git-rev-list --header $order \
-                             --parents --boundary --default HEAD $args] r]
+       set fd [open [concat | git-rev-list --header $order \
+                         --parents --boundary --default HEAD $args] r]
     } err]} {
        puts stderr "Error executing git-rev-list: $err"
        exit 1
     }
-    set leftover {}
-    fconfigure $commfd -blocking 0 -translation lf
+    set commfd($view) $fd
+    set leftover($view) {}
+    fconfigure $fd -blocking 0 -translation lf
     if {$tclencoding != {}} {
-       fconfigure $commfd -encoding $tclencoding
+       fconfigure $fd -encoding $tclencoding
     }
-    fileevent $commfd readable [list getcommitlines $commfd]
-    . config -cursor watch
-    settextcursor watch
+    fileevent $fd readable [list getcommitlines $fd $view]
+    nowbusy $view
 }
 
 proc stop_rev_list {} {
-    global commfd
+    global commfd curview
 
-    if {![info exists commfd]} return
+    if {![info exists commfd($curview)]} return
+    set fd $commfd($curview)
     catch {
-       set pid [pid $commfd]
+       set pid [pid $fd]
        exec kill $pid
     }
-    catch {close $commfd}
-    unset commfd
+    catch {close $fd}
+    unset commfd($curview)
 }
 
 proc getcommits {} {
-    global phase canv mainfont
+    global phase canv mainfont curview
 
     set phase getcommits
-    start_rev_list
+    initlayout
+    start_rev_list $curview
     $canv delete all
     $canv create text 3 3 -anchor nw -text "Reading commits..." \
        -font $mainfont -tags textitems
 }
 
-proc getcommitlines {commfd}  {
+proc getcommitlines {fd view}  {
     global commitlisted nextupdate
-    global leftover
+    global leftover commfd
     global displayorder commitidx commitrow commitdata
-    global parentlist childlist children
+    global parentlist childlist children curview hlview
+    global vparentlist vchildlist vdisporder vcmitlisted
 
-    set stuff [read $commfd]
+    set stuff [read $fd]
     if {$stuff == {}} {
-       if {![eof $commfd]} return
+       if {![eof $fd]} return
+       unset commfd($view)
        # set it blocking so we wait for the process to terminate
-       fconfigure $commfd -blocking 1
-       if {![catch {close $commfd} err]} {
-           after idle finishcommits
+       fconfigure $fd -blocking 1
+       if {![catch {close $fd} err]} {
+           notbusy $view
+           if {$view == $curview} {
+               after idle finishcommits
+           }
            return
        }
        if {[string range $err 0 4] == "usage"} {
@@ -103,13 +110,13 @@ proc getcommitlines {commfd}  {
     while 1 {
        set i [string first "\0" $stuff $start]
        if {$i < 0} {
-           append leftover [string range $stuff $start end]
+           append leftover($view) [string range $stuff $start end]
            break
        }
        if {$start == 0} {
-           set cmit $leftover
+           set cmit $leftover($view)
            append cmit [string range $stuff 0 [expr {$i - 1}]]
-           set leftover {}
+           set leftover($view) {}
        } else {
            set cmit [string range $stuff $start [expr {$i - 1}]]
        }
@@ -145,40 +152,49 @@ proc getcommitlines {commfd}  {
            set i 0
            foreach p $olds {
                if {$i == 0 || [lsearch -exact $olds $p] >= $i} {
-                   lappend children($p) $id
+                   lappend children($view,$p) $id
                }
                incr i
            }
        } else {
            set olds {}
        }
-       lappend parentlist $olds
-       if {[info exists children($id)]} {
-           lappend childlist $children($id)
-           unset children($id)
-       } else {
-           lappend childlist {}
+       if {![info exists children($view,$id)]} {
+           set children($view,$id) {}
        }
        set commitdata($id) [string range $cmit [expr {$j + 1}] end]
-       set commitrow($id) $commitidx
-       incr commitidx
-       lappend displayorder $id
-       lappend commitlisted $listed
+       set commitrow($view,$id) $commitidx($view)
+       incr commitidx($view)
+       if {$view == $curview} {
+           lappend parentlist $olds
+           lappend childlist $children($view,$id)
+           lappend displayorder $id
+           lappend commitlisted $listed
+       } else {
+           lappend vparentlist($view) $olds
+           lappend vchildlist($view) $children($view,$id)
+           lappend vdisporder($view) $id
+           lappend vcmitlisted($view) $listed
+       }
        set gotsome 1
     }
     if {$gotsome} {
-       layoutmore
+       if {$view == $curview} {
+           layoutmore
+       } elseif {[info exists hlview] && $view == $hlview} {
+           highlightmore
+       }
     }
     if {[clock clicks -milliseconds] >= $nextupdate} {
-       doupdate 1
+       doupdate
     }
 }
 
-proc doupdate {reading} {
+proc doupdate {} {
     global commfd nextupdate numcommits ncmupdate
 
-    if {$reading} {
-       fileevent $commfd readable {}
+    foreach v [array names commfd] {
+       fileevent $commfd($v) readable {}
     }
     update
     set nextupdate [expr {[clock clicks -milliseconds] + 100}]
@@ -189,8 +205,9 @@ proc doupdate {reading} {
     } else {
        set ncmupdate [expr {$numcommits + 100}]
     }
-    if {$reading} {
-       fileevent $commfd readable [list getcommitlines $commfd]
+    foreach v [array names commfd] {
+       set fd $commfd($v)
+       fileevent $fd readable [list getcommitlines $fd $v]
     }
 }
 
@@ -200,13 +217,18 @@ proc readcommit {id} {
 }
 
 proc updatecommits {} {
-    global viewdata curview revtreeargs phase
+    global viewdata curview revtreeargs phase displayorder
+    global children commitrow
 
     if {$phase ne {}} {
        stop_rev_list
        set phase {}
     }
     set n $curview
+    foreach id $displayorder {
+       catch {unset children($n,$id)}
+       catch {unset commitrow($n,$id)}
+    }
     set curview -1
     catch {unset viewdata($n)}
     readrefs
@@ -363,14 +385,23 @@ proc makewindow {} {
     .bar add cascade -label "Edit" -menu .bar.edit
     .bar.edit add command -label "Preferences" -command doprefs
     .bar.edit configure -font $uifont
+
     menu .bar.view -font $uifont
+    menu .bar.view.hl -font $uifont -tearoff 0
     .bar add cascade -label "View" -menu .bar.view
-    .bar.view add command -label "New view..." -command newview
-    .bar.view add command -label "Edit view..." -command editview
+    .bar.view add command -label "New view..." -command {newview 0}
+    .bar.view add command -label "Edit view..." -command editview \
+       -state disabled
     .bar.view add command -label "Delete view" -command delview -state disabled
+    .bar.view add cascade -label "Highlight" -menu .bar.view.hl
     .bar.view add separator
     .bar.view add radiobutton -label "All files" -command {showview 0} \
        -variable selectedview -value 0
+    .bar.view.hl add command -label "New view..." -command {newview 1}
+    .bar.view.hl add command -label "Remove" -command delhighlight \
+       -state disabled
+    .bar.view.hl add separator
+    
     menu .bar.help
     .bar add cascade -label "Help" -menu .bar.help
     .bar.help add command -label "About gitk" -command about
@@ -1154,9 +1185,10 @@ proc highlight_flist {ll} {
 
 # Code to implement multiple views
 
-proc newview {} {
-    global nextviewnum newviewname newviewperm uifont
+proc newview {ishighlight} {
+    global nextviewnum newviewname newviewperm uifont newishighlight
 
+    set newishighlight $ishighlight
     set top .gitkview
     if {[winfo exists $top]} {
        raise $top
@@ -1215,19 +1247,23 @@ proc vieweditor {top n title} {
     focus $top.t
 }
 
-proc viewmenuitem {n} {
-    set nmenu [.bar.view index end]
-    set targetcmd [list showview $n]
-    for {set i 6} {$i <= $nmenu} {incr i} {
-       if {[.bar.view entrycget $i -command] eq $targetcmd} {
-           return $i
+proc doviewmenu {m first cmd op args} {
+    set nmenu [$m index end]
+    for {set i $first} {$i <= $nmenu} {incr i} {
+       if {[$m entrycget $i -command] eq $cmd} {
+           eval $m $op $i $args
+           break
        }
     }
-    return {}
+}
+
+proc allviewmenus {n op args} {
+    doviewmenu .bar.view 6 [list showview $n] $op $args
+    doviewmenu .bar.view.hl 3 [list addhighlight $n] $op $args
 }
 
 proc newviewok {top n} {
-    global nextviewnum newviewperm newviewname
+    global nextviewnum newviewperm newviewname newishighlight
     global viewname viewfiles viewperm selectedview curview
 
     set files {}
@@ -1243,18 +1279,18 @@ proc newviewok {top n} {
        set viewname($n) $newviewname($n)
        set viewperm($n) $newviewperm($n)
        set viewfiles($n) $files
-       .bar.view add radiobutton -label $viewname($n) \
-           -command [list showview $n] -variable selectedview -value $n
-       after idle showview $n
+       addviewmenu $n
+       if {!$newishighlight} {
+           after idle showview $n
+       } else {
+           after idle addhighlight $n
+       }
     } else {
        # editing an existing view
        set viewperm($n) $newviewperm($n)
        if {$newviewname($n) ne $viewname($n)} {
            set viewname($n) $newviewname($n)
-           set i [viewmenuitem $n]
-           if {$i ne {}} {
-               .bar.view entryconf $i -label $viewname($n)
-           }
+           allviewmenus $n entryconf -label $viewname($n)
        }
        if {$files ne $viewfiles($n)} {
            set viewfiles($n) $files
@@ -1270,15 +1306,21 @@ proc delview {} {
     global curview viewdata viewperm
 
     if {$curview == 0} return
-    set i [viewmenuitem $curview]
-    if {$i ne {}} {
-       .bar.view delete $i
-    }
+    allviewmenus $curview delete
     set viewdata($curview) {}
     set viewperm($curview) 0
     showview 0
 }
 
+proc addviewmenu {n} {
+    global viewname
+
+    .bar.view add radiobutton -label $viewname($n) \
+       -command [list showview $n] -variable selectedview -value $n
+    .bar.view.hl add radiobutton -label $viewname($n) \
+       -command [list addhighlight $n] -variable selectedhlview -value $n
+}
+
 proc flatten {var} {
     global $var
 
@@ -1301,14 +1343,15 @@ proc unflatten {var l} {
 proc showview {n} {
     global curview viewdata viewfiles
     global displayorder parentlist childlist rowidlist rowoffsets
-    global colormap rowtextx commitrow
+    global colormap rowtextx commitrow nextcolor canvxmax
     global numcommits rowrangelist commitlisted idrowranges
     global selectedline currentid canv canvy0
     global matchinglines treediffs
     global pending_select phase
-    global commitidx rowlaidout rowoptim linesegends leftover
+    global commitidx rowlaidout rowoptim linesegends
     global commfd nextupdate
-    global selectedview
+    global selectedview hlview selectedhlview
+    global vparentlist vchildlist vdisporder vcmitlisted
 
     if {$n == $curview} return
     set selid {}
@@ -1329,20 +1372,19 @@ proc showview {n} {
     normalline
     stopfindproc
     if {$curview >= 0} {
+       set vparentlist($curview) $parentlist
+       set vchildlist($curview) $childlist
+       set vdisporder($curview) $displayorder
+       set vcmitlisted($curview) $commitlisted
        if {$phase ne {}} {
            set viewdata($curview) \
-               [list $phase $displayorder $parentlist $childlist $rowidlist \
-                    $rowoffsets $rowrangelist $commitlisted \
-                    [flatten children] [flatten idrowranges] \
-                    [flatten idinlist] \
-                    $commitidx $rowlaidout $rowoptim $numcommits \
-                    $linesegends $leftover $commfd]
-           fileevent $commfd readable {}
+               [list $phase $rowidlist $rowoffsets $rowrangelist \
+                    [flatten idrowranges] [flatten idinlist] \
+                    $rowlaidout $rowoptim $numcommits $linesegends]
        } elseif {![info exists viewdata($curview)]
                  || [lindex $viewdata($curview) 0] ne {}} {
            set viewdata($curview) \
-               [list {} $displayorder $parentlist $childlist $rowidlist \
-                    $rowoffsets $rowrangelist $commitlisted]
+               [list {} $rowidlist $rowoffsets $rowrangelist]
        }
     }
     catch {unset matchinglines}
@@ -1351,8 +1393,11 @@ proc showview {n} {
 
     set curview $n
     set selectedview $n
+    set selectedhlview -1
+    .bar.view entryconf 1 -state [expr {$n == 0? "disabled": "normal"}]
     .bar.view entryconf 2 -state [expr {$n == 0? "disabled": "normal"}]
-    .bar.view entryconf 3 -state [expr {$n == 0? "disabled": "normal"}]
+    catch {unset hlview}
+    .bar.view.hl entryconf 1 -state disabled
 
     if {![info exists viewdata($n)]} {
        set pending_select $selid
@@ -1362,46 +1407,36 @@ proc showview {n} {
 
     set v $viewdata($n)
     set phase [lindex $v 0]
-    set displayorder [lindex $v 1]
-    set parentlist [lindex $v 2]
-    set childlist [lindex $v 3]
-    set rowidlist [lindex $v 4]
-    set rowoffsets [lindex $v 5]
-    set rowrangelist [lindex $v 6]
-    set commitlisted [lindex $v 7]
+    set displayorder $vdisporder($n)
+    set parentlist $vparentlist($n)
+    set childlist $vchildlist($n)
+    set commitlisted $vcmitlisted($n)
+    set rowidlist [lindex $v 1]
+    set rowoffsets [lindex $v 2]
+    set rowrangelist [lindex $v 3]
     if {$phase eq {}} {
        set numcommits [llength $displayorder]
        catch {unset idrowranges}
-       catch {unset children}
     } else {
-       unflatten children [lindex $v 8]
-       unflatten idrowranges [lindex $v 9]
-       unflatten idinlist [lindex $v 10]
-       set commitidx [lindex $v 11]
-       set rowlaidout [lindex $v 12]
-       set rowoptim [lindex $v 13]
-       set numcommits [lindex $v 14]
-       set linesegends [lindex $v 15]
-       set leftover [lindex $v 16]
-       set commfd [lindex $v 17]
-       fileevent $commfd readable [list getcommitlines $commfd]
-       set nextupdate [expr {[clock clicks -milliseconds] + 100}]
+       unflatten idrowranges [lindex $v 4]
+       unflatten idinlist [lindex $v 5]
+       set rowlaidout [lindex $v 6]
+       set rowoptim [lindex $v 7]
+       set numcommits [lindex $v 8]
+       set linesegends [lindex $v 9]
     }
 
     catch {unset colormap}
     catch {unset rowtextx}
-    catch {unset commitrow}
+    set nextcolor 0
+    set canvxmax [$canv cget -width]
     set curview $n
     set row 0
-    foreach id $displayorder {
-       set commitrow($id) $row
-       incr row
-    }
     setcanvscroll
     set yf 0
     set row 0
-    if {$selid ne {} && [info exists commitrow($selid)]} {
-       set row $commitrow($selid)
+    if {$selid ne {} && [info exists commitrow($n,$selid)]} {
+       set row $commitrow($n,$selid)
        # try to get the selected row in the same position on the screen
        set ymax [lindex [$canv cget -scrollregion] 3]
        set ytop [expr {[yc $row] - $yscreen}]
@@ -1413,21 +1448,98 @@ proc showview {n} {
     allcanvs yview moveto $yf
     drawvisible
     selectline $row 0
-    if {$phase eq {}} {
-       global maincursor textcursor
-       . config -cursor $maincursor
-       settextcursor $textcursor
-    } else {
-       . config -cursor watch
-       settextcursor watch
+    if {$phase ne {}} {
        if {$phase eq "getcommits"} {
            global mainfont
            $canv create text 3 3 -anchor nw -text "Reading commits..." \
                -font $mainfont -tags textitems
        }
+       if {[info exists commfd($n)]} {
+           layoutmore
+       } else {
+           finishcommits
+       }
     }
 }
 
+proc addhighlight {n} {
+    global hlview curview viewdata highlighted highlightedrows
+    global selectedhlview
+
+    if {[info exists hlview]} {
+       delhighlight
+    }
+    set hlview $n
+    set selectedhlview $n
+    .bar.view.hl entryconf 1 -state normal
+    set highlighted($n) 0
+    set highlightedrows {}
+    if {$n != $curview && ![info exists viewdata($n)]} {
+       set viewdata($n) [list getcommits {{}} {{}} {} {} {} 0 0 0 {}]
+       set vparentlist($n) {}
+       set vchildlist($n) {}
+       set vdisporder($n) {}
+       set vcmitlisted($n) {}
+       start_rev_list $n
+    } else {
+       highlightmore
+    }
+}
+
+proc delhighlight {} {
+    global hlview highlightedrows canv linehtag mainfont
+    global selectedhlview selectedline
+
+    if {![info exists hlview]} return
+    unset hlview
+    set selectedhlview {}
+    .bar.view.hl entryconf 1 -state disabled
+    foreach l $highlightedrows {
+       $canv itemconf $linehtag($l) -font $mainfont
+       if {$l == $selectedline} {
+           $canv delete secsel
+           set t [eval $canv create rect [$canv bbox $linehtag($l)] \
+                      -outline {{}} -tags secsel \
+                      -fill [$canv cget -selectbackground]]
+           $canv lower $t
+       }
+    }
+}
+
+proc highlightmore {} {
+    global hlview highlighted commitidx highlightedrows linehtag mainfont
+    global displayorder vdisporder curview canv commitrow selectedline
+
+    set font [concat $mainfont bold]
+    set max $commitidx($hlview)
+    if {$hlview == $curview} {
+       set disp $displayorder
+    } else {
+       set disp $vdisporder($hlview)
+    }
+    for {set i $highlighted($hlview)} {$i < $max} {incr i} {
+       set id [lindex $disp $i]
+       if {[info exists commitrow($curview,$id)]} {
+           set row $commitrow($curview,$id)
+           if {[info exists linehtag($row)]} {
+               $canv itemconf $linehtag($row) -font $font
+               lappend highlightedrows $row
+               if {$row == $selectedline} {
+                   $canv delete secsel
+                   set t [eval $canv create rect \
+                              [$canv bbox $linehtag($row)] \
+                              -outline {{}} -tags secsel \
+                              -fill [$canv cget -selectbackground]]
+                   $canv lower $t
+               }
+           }
+       }
+    }
+    set highlighted($hlview) $max
+}
+
+# Graph layout functions
+
 proc shortids {ids} {
     set res {}
     foreach id $ids {
@@ -1463,19 +1575,19 @@ proc ntimes {n o} {
 }
 
 proc usedinrange {id l1 l2} {
-    global children commitrow childlist
+    global children commitrow childlist curview
 
-    if {[info exists commitrow($id)]} {
-       set r $commitrow($id)
+    if {[info exists commitrow($curview,$id)]} {
+       set r $commitrow($curview,$id)
        if {$l1 <= $r && $r <= $l2} {
            return [expr {$r - $l1 + 1}]
        }
        set kids [lindex $childlist $r]
     } else {
-       set kids $children($id)
+       set kids $children($curview,$id)
     }
     foreach c $kids {
-       set r $commitrow($c)
+       set r $commitrow($curview,$c)
        if {$l1 <= $r && $r <= $l2} {
            return [expr {$r - $l1 + 1}]
        }
@@ -1546,20 +1658,18 @@ proc initlayout {} {
     global rowidlist rowoffsets displayorder commitlisted
     global rowlaidout rowoptim
     global idinlist rowchk rowrangelist idrowranges
-    global commitidx numcommits canvxmax canv
+    global numcommits canvxmax canv
     global nextcolor
     global parentlist childlist children
-    global colormap rowtextx commitrow
+    global colormap rowtextx
     global linesegends
 
-    set commitidx 0
     set numcommits 0
     set displayorder {}
     set commitlisted {}
     set parentlist {}
     set childlist {}
     set rowrangelist {}
-    catch {unset children}
     set nextcolor 0
     set rowidlist {{}}
     set rowoffsets {{}}
@@ -1570,7 +1680,6 @@ proc initlayout {} {
     set canvxmax [$canv cget -width]
     catch {unset colormap}
     catch {unset rowtextx}
-    catch {unset commitrow}
     catch {unset idrowranges}
     set linesegends {}
 }
@@ -1605,10 +1714,10 @@ proc visiblerows {} {
 
 proc layoutmore {} {
     global rowlaidout rowoptim commitidx numcommits optim_delay
-    global uparrowlen
+    global uparrowlen curview
 
     set row $rowlaidout
-    set rowlaidout [layoutrows $row $commitidx 0]
+    set rowlaidout [layoutrows $row $commitidx($curview) 0]
     set orow [expr {$rowlaidout - $uparrowlen - 1}]
     if {$orow > $rowoptim} {
        optimize_rows $rowoptim 0 $orow
@@ -1622,7 +1731,7 @@ proc layoutmore {} {
 
 proc showstuff {canshow} {
     global numcommits commitrow pending_select selectedline
-    global linesegends idrowranges idrangedrawn
+    global linesegends idrowranges idrangedrawn curview
 
     if {$numcommits == 0} {
        global phase
@@ -1657,9 +1766,9 @@ proc showstuff {canshow} {
        incr row
     }
     if {[info exists pending_select] &&
-       [info exists commitrow($pending_select)] &&
-       $commitrow($pending_select) < $numcommits} {
-       selectline $commitrow($pending_select) 1
+       [info exists commitrow($curview,$pending_select)] &&
+       $commitrow($curview,$pending_select) < $numcommits} {
+       selectline $commitrow($curview,$pending_select) 1
     }
     if {![info exists selectedline] && ![info exists pending_select]} {
        selectline 0 1
@@ -1671,7 +1780,7 @@ proc layoutrows {row endrow last} {
     global uparrowlen downarrowlen maxwidth mingaplen
     global childlist parentlist
     global idrowranges linesegends
-    global commitidx
+    global commitidx curview
     global idinlist rowchk rowrangelist
 
     set idlist [lindex $rowidlist $row]
@@ -1691,7 +1800,8 @@ proc layoutrows {row endrow last} {
        set nev [expr {[llength $idlist] + [llength $newolds]
                       + [llength $oldolds] - $maxwidth + 1}]
        if {$nev > 0} {
-           if {!$last && $row + $uparrowlen + $mingaplen >= $commitidx} break
+           if {!$last &&
+               $row + $uparrowlen + $mingaplen >= $commitidx($curview)} break
            for {set x [llength $idlist]} {[incr x -1] >= 0} {} {
                set i [lindex $idlist $x]
                if {![info exists rowchk($i)] || $row >= $rowchk($i)} {
@@ -1780,30 +1890,28 @@ proc layoutrows {row endrow last} {
 proc addextraid {id row} {
     global displayorder commitrow commitinfo
     global commitidx commitlisted
-    global parentlist childlist children
+    global parentlist childlist children curview
 
-    incr commitidx
+    incr commitidx($curview)
     lappend displayorder $id
     lappend commitlisted 0
     lappend parentlist {}
-    set commitrow($id) $row
+    set commitrow($curview,$id) $row
     readcommit $id
     if {![info exists commitinfo($id)]} {
        set commitinfo($id) {"No commit information available"}
     }
-    if {[info exists children($id)]} {
-       lappend childlist $children($id)
-       unset children($id)
-    } else {
-       lappend childlist {}
+    if {![info exists children($curview,$id)]} {
+       set children($curview,$id) {}
     }
+    lappend childlist $children($curview,$id)
 }
 
 proc layouttail {} {
-    global rowidlist rowoffsets idinlist commitidx
+    global rowidlist rowoffsets idinlist commitidx curview
     global idrowranges rowrangelist
 
-    set row $commitidx
+    set row $commitidx($curview)
     set idlist [lindex $rowidlist $row]
     while {$idlist ne {}} {
        set col [expr {[llength $idlist] - 1}]
@@ -1978,12 +2086,13 @@ proc linewidth {id} {
 }
 
 proc rowranges {id} {
-    global phase idrowranges commitrow rowlaidout rowrangelist
+    global phase idrowranges commitrow rowlaidout rowrangelist curview
 
     set ranges {}
     if {$phase eq {} ||
-       ([info exists commitrow($id)] && $commitrow($id) < $rowlaidout)} {
-       set ranges [lindex $rowrangelist $commitrow($id)]
+       ([info exists commitrow($curview,$id)]
+        && $commitrow($curview,$id) < $rowlaidout)} {
+       set ranges [lindex $rowrangelist $commitrow($curview,$id)]
     } elseif {[info exists idrowranges($id)]} {
        set ranges $idrowranges($id)
     }
@@ -1994,11 +2103,12 @@ proc drawlineseg {id i} {
     global rowoffsets rowidlist
     global displayorder
     global canv colormap linespc
-    global numcommits commitrow
+    global numcommits commitrow curview
 
     set ranges [rowranges $id]
     set downarrow 1
-    if {[info exists commitrow($id)] && $commitrow($id) < $numcommits} {
+    if {[info exists commitrow($curview,$id)]
+       && $commitrow($curview,$id) < $numcommits} {
        set downarrow [expr {$i < [llength $ranges] / 2 - 1}]
     } else {
        set downarrow 1
@@ -2122,7 +2232,7 @@ proc drawparentlinks {id row col olds} {
 proc drawlines {id} {
     global colormap canv
     global idrangedrawn
-    global childlist iddrawn commitrow rowidlist
+    global children iddrawn commitrow rowidlist curview
 
     $canv delete lines.$id
     set nr [expr {[llength [rowranges $id]] / 2}]
@@ -2131,9 +2241,9 @@ proc drawlines {id} {
            drawlineseg $id $i
        }
     }
-    foreach child [lindex $childlist $commitrow($id)] {
+    foreach child $children($curview,$id) {
        if {[info exists iddrawn($child)]} {
-           set row $commitrow($child)
+           set row $commitrow($curview,$child)
            set col [lsearch -exact [lindex $rowidlist $row] $child]
            if {$col >= 0} {
                drawparentlinks $child $row $col [list $id]
@@ -2147,7 +2257,8 @@ proc drawcmittext {id row col rmx} {
     global commitlisted commitinfo rowidlist
     global rowtextx idpos idtags idheads idotherrefs
     global linehtag linentag linedtag
-    global mainfont namefont canvxmax
+    global mainfont canvxmax
+    global hlview commitrow highlightedrows
 
     set ofill [expr {[lindex $commitlisted $row]? "blue": "white"}]
     set x [xc $row $col]
@@ -2172,11 +2283,16 @@ proc drawcmittext {id row col rmx} {
     set name [lindex $commitinfo($id) 1]
     set date [lindex $commitinfo($id) 2]
     set date [formatdate $date]
+    set font $mainfont
+    if {[info exists hlview] && [info exists commitrow($hlview,$id)]} {
+       lappend font bold
+       lappend highlightedrows $row
+    }
     set linehtag($row) [$canv create text $xt $y -anchor w \
-                           -text $headline -font $mainfont ]
+                           -text $headline -font $font]
     $canv bind $linehtag($row) <Button-3> "rowmenu %X %Y $id"
     set linentag($row) [$canv2 create text 3 $y -anchor w \
-                           -text $name -font $namefont]
+                           -text $name -font $mainfont]
     set linedtag($row) [$canv3 create text 3 $y -anchor w \
                            -text $date -font $mainfont]
     set xr [expr {$xt + [font measure $mainfont $headline]}]
@@ -2307,21 +2423,19 @@ proc findcrossings {id} {
 
 proc assigncolor {id} {
     global colormap colors nextcolor
-    global commitrow parentlist children childlist
+    global commitrow parentlist children children curview
 
     if {[info exists colormap($id)]} return
     set ncolors [llength $colors]
-    if {[info exists commitrow($id)]} {
-       set kids [lindex $childlist $commitrow($id)]
-    } elseif {[info exists children($id)]} {
-       set kids $children($id)
+    if {[info exists children($curview,$id)]} {
+       set kids $children($curview,$id)
     } else {
        set kids {}
     }
     if {[llength $kids] == 1} {
        set child [lindex $kids 0]
        if {[info exists colormap($child)]
-           && [llength [lindex $parentlist $commitrow($child)]] == 1} {
+           && [llength [lindex $parentlist $commitrow($curview,$child)]] == 1} {
            set colormap($id) $colormap($child)
            return
        }
@@ -2349,7 +2463,7 @@ proc assigncolor {id} {
                && [lsearch -exact $badcolors $colormap($child)] < 0} {
                lappend badcolors $colormap($child)
            }
-           foreach p [lindex $parentlist $commitrow($child)] {
+           foreach p [lindex $parentlist $commitrow($curview,$child)] {
                if {[info exists colormap($p)]
                    && [lsearch -exact $badcolors $colormap($p)] < 0} {
                    lappend badcolors $colormap($p)
@@ -2382,7 +2496,7 @@ proc bindline {t id} {
 proc drawtags {id x xt y1} {
     global idtags idheads idotherrefs
     global linespc lthickness
-    global canv mainfont commitrow rowtextx
+    global canv mainfont commitrow rowtextx curview
 
     set marks {}
     set ntags 0
@@ -2425,7 +2539,7 @@ proc drawtags {id x xt y1} {
                       $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 $tag 1]
-           set rowtextx($commitrow($id)) [expr {$xr + $linespc}]
+           set rowtextx($commitrow($curview,$id)) [expr {$xr + $linespc}]
        } else {
            # draw a head or other ref
            if {[incr nheads -1] >= 0} {
@@ -2467,21 +2581,17 @@ proc xcoord {i level ln} {
 }
 
 proc finishcommits {} {
-    global commitidx phase
+    global commitidx phase curview
     global canv mainfont ctext maincursor textcursor
     global findinprogress pending_select
 
-    if {$commitidx > 0} {
+    if {$commitidx($curview) > 0} {
        drawrest
     } else {
        $canv delete all
        $canv create text 3 3 -anchor nw -text "No commits selected" \
            -font $mainfont -tags textitems
     }
-    if {![info exists findinprogress]} {
-       . config -cursor $maincursor
-       settextcursor $textcursor
-    }
     set phase {}
     catch {unset pending_select}
 }
@@ -2497,18 +2607,38 @@ proc settextcursor {c} {
     set curtextcursor $c
 }
 
+proc nowbusy {what} {
+    global isbusy
+
+    if {[array names isbusy] eq {}} {
+       . config -cursor watch
+       settextcursor watch
+    }
+    set isbusy($what) 1
+}
+
+proc notbusy {what} {
+    global isbusy maincursor textcursor
+
+    catch {unset isbusy($what)}
+    if {[array names isbusy] eq {}} {
+       . config -cursor $maincursor
+       settextcursor $textcursor
+    }
+}
+
 proc drawrest {} {
     global numcommits
     global startmsecs
     global canvy0 numcommits linespc
-    global rowlaidout commitidx
+    global rowlaidout commitidx curview
     global pending_select
 
     set row $rowlaidout
-    layoutrows $rowlaidout $commitidx 1
+    layoutrows $rowlaidout $commitidx($curview) 1
     layouttail
-    optimize_rows $row 0 $commitidx
-    showstuff $commitidx
+    optimize_rows $row 0 $commitidx($curview)
+    showstuff $commitidx($curview)
     if {[info exists pending_select]} {
        selectline 0 1
     }
@@ -2540,7 +2670,7 @@ proc findmatches {f} {
 proc dofind {} {
     global findtype findloc findstring markedmatches commitinfo
     global numcommits displayorder linehtag linentag linedtag
-    global mainfont namefont canv canv2 canv3 selectedline
+    global mainfont canv canv2 canv3 selectedline
     global matchinglines foundstring foundstrlen matchstring
     global commitdata
 
@@ -2601,7 +2731,7 @@ proc dofind {} {
                markmatches $canv $l $f $linehtag($l) $matches $mainfont
            } elseif {$ty == "Author"} {
                drawcmitrow $l
-               markmatches $canv2 $l $f $linentag($l) $matches $namefont
+               markmatches $canv2 $l $f $linentag($l) $matches $mainfont
            } elseif {$ty == "Date"} {
                drawcmitrow $l
                markmatches $canv3 $l $f $linedtag($l) $matches $mainfont
@@ -2699,13 +2829,8 @@ proc stopfindproc {{done 0}} {
        catch {close $findprocfile}
        unset findprocpid
     }
-    if {[info exists findinprogress]} {
-       unset findinprogress
-       if {$phase eq {}} {
-           . config -cursor $maincursor
-           settextcursor $textcursor
-       }
-    }
+    catch {unset findinprogress}
+    notbusy find
 }
 
 proc findpatches {} {
@@ -2745,14 +2870,13 @@ proc findpatches {} {
     fconfigure $f -blocking 0
     fileevent $f readable readfindproc
     set finddidsel 0
-    . config -cursor watch
-    settextcursor watch
+    nowbusy find
     set findinprogress 1
 }
 
 proc readfindproc {} {
     global findprocfile finddidsel
-    global commitrow matchinglines findinsertpos
+    global commitrow matchinglines findinsertpos curview
 
     set n [gets $findprocfile line]
     if {$n < 0} {
@@ -2769,11 +2893,11 @@ proc readfindproc {} {
        stopfindproc
        return
     }
-    if {![info exists commitrow($id)]} {
+    if {![info exists commitrow($curview,$id)]} {
        puts stderr "spurious id: $id"
        return
     }
-    set l $commitrow($id)
+    set l $commitrow($curview,$id)
     insertmatch $l $id
 }
 
@@ -2847,8 +2971,7 @@ proc findfiles {} {
     set finddidsel 0
     set findinsertpos end
     set id [lindex $displayorder $l]
-    . config -cursor watch
-    settextcursor watch
+    nowbusy find
     set findinprogress 1
     findcont
     update
@@ -3018,7 +3141,7 @@ proc commit_descriptor {p} {
 # append some text to the ctext widget, and make any SHA1 ID
 # that we know about be a clickable link.
 proc appendwithlinks {text} {
-    global ctext commitrow linknum
+    global ctext commitrow linknum curview
 
     set start [$ctext index "end - 1c"]
     $ctext insert end $text
@@ -3028,11 +3151,12 @@ proc appendwithlinks {text} {
        set s [lindex $l 0]
        set e [lindex $l 1]
        set linkid [string range $text $s $e]
-       if {![info exists commitrow($linkid)]} continue
+       if {![info exists commitrow($curview,$linkid)]} continue
        incr e
        $ctext tag add link "$start + $s c" "$start + $e c"
        $ctext tag add link$linknum "$start + $s c" "$start + $e c"
-       $ctext tag bind link$linknum <1> [list selectline $commitrow($linkid) 1]
+       $ctext tag bind link$linknum <1> \
+           [list selectline $commitrow($curview,$linkid) 1]
        incr linknum
     }
     $ctext tag conf link -foreground blue -underline 1
@@ -3686,11 +3810,10 @@ proc redisplay {} {
 }
 
 proc incrfont {inc} {
-    global mainfont namefont textfont ctext canv phase
+    global mainfont textfont ctext canv phase
     global stopped entries
     unmarkmatches
     set mainfont [lreplace $mainfont 1 1 [expr {[lindex $mainfont 1] + $inc}]]
-    set namefont [lreplace $namefont 1 1 [expr {[lindex $namefont 1] + $inc}]]
     set textfont [lreplace $textfont 1 1 [expr {[lindex $textfont 1] + $inc}]]
     setcoords
     $ctext conf -font $textfont
@@ -3729,7 +3852,7 @@ proc sha1change {n1 n2 op} {
 
 proc gotocommit {} {
     global sha1string currentid commitrow tagids headids
-    global displayorder numcommits
+    global displayorder numcommits curview
 
     if {$sha1string == {}
        || ([info exists currentid] && $sha1string == $currentid)} return
@@ -3755,8 +3878,8 @@ proc gotocommit {} {
            }
        }
     }
-    if {[info exists commitrow($id)]} {
-       selectline $commitrow($id) 1
+    if {[info exists commitrow($curview,$id)]} {
+       selectline $commitrow($curview,$id) 1
        return
     }
     if {[regexp {^[0-9a-fA-F]{4,}$} $sha1string]} {
@@ -3864,7 +3987,7 @@ proc arrowjump {id n y} {
 }
 
 proc lineclick {x y id isnew} {
-    global ctext commitinfo childlist commitrow canv thickerline
+    global ctext commitinfo children canv thickerline curview
 
     if {![info exists commitinfo($id)] && ![getcommit $id]} return
     unmarkmatches
@@ -3903,7 +4026,7 @@ proc lineclick {x y id isnew} {
     $ctext insert end "\tAuthor:\t[lindex $info 1]\n"
     set date [formatdate [lindex $info 2]]
     $ctext insert end "\tDate:\t$date\n"
-    set kids [lindex $childlist $commitrow($id)]
+    set kids $children($curview,$id)
     if {$kids ne {}} {
        $ctext insert end "\nChildren:"
        set i 0
@@ -3934,9 +4057,9 @@ proc normalline {} {
 }
 
 proc selbyid {id} {
-    global commitrow
-    if {[info exists commitrow($id)]} {
-       selectline $commitrow($id) 1
+    global commitrow curview
+    if {[info exists commitrow($curview,$id)]} {
+       selectline $commitrow($curview,$id) 1
     }
 }
 
@@ -3949,9 +4072,10 @@ proc mstime {} {
 }
 
 proc rowmenu {x y id} {
-    global rowctxmenu commitrow selectedline rowmenuid
+    global rowctxmenu commitrow selectedline rowmenuid curview
 
-    if {![info exists selectedline] || $commitrow($id) eq $selectedline} {
+    if {![info exists selectedline]
+       || $commitrow($curview,$id) eq $selectedline} {
        set state disabled
     } else {
        set state normal
@@ -4151,14 +4275,15 @@ proc domktag {} {
 }
 
 proc redrawtags {id} {
-    global canv linehtag commitrow idpos selectedline
+    global canv linehtag commitrow idpos selectedline curview
 
-    if {![info exists commitrow($id)]} return
-    drawcmitrow $commitrow($id)
+    if {![info exists commitrow($curview,$id)]} return
+    drawcmitrow $commitrow($curview,$id)
     $canv delete tag.$id
     set xt [eval drawtags $id $idpos($id)]
-    $canv coords $linehtag($commitrow($id)) $xt [lindex $idpos($id) 2]
-    if {[info exists selectedline] && $selectedline == $commitrow($id)} {
+    $canv coords $linehtag($commitrow($curview,$id)) $xt [lindex $idpos($id) 2]
+    if {[info exists selectedline]
+       && $selectedline == $commitrow($curview,$id)} {
        selectline $selectedline 0
     }
 }
@@ -4674,8 +4799,6 @@ set colors {green red blue magenta darkgrey brown orange}
 
 catch {source ~/.gitk}
 
-set namefont $mainfont
-
 font create optionfont -family sans-serif -size -12
 
 set revtreeargs {}
@@ -4704,6 +4827,7 @@ set optim_delay 16
 set nextviewnum 1
 set curview 0
 set selectedview 0
+set selectedhlview {}
 set viewfiles(0) {}
 set viewperm(0) 0
 
@@ -4733,10 +4857,9 @@ if {$cmdline_files ne {}} {
     set viewname(1) "Command line"
     set viewfiles(1) $cmdline_files
     set viewperm(1) 0
-    .bar.view add radiobutton -label $viewname(1) -command {showview 1} \
-       -variable selectedview -value 1
+    addviewmenu 1
+    .bar.view entryconf 1 -state normal
     .bar.view entryconf 2 -state normal
-    .bar.view entryconf 3 -state normal
 }
 
 if {[info exists permviews]} {
@@ -4746,8 +4869,7 @@ if {[info exists permviews]} {
        set viewname($n) [lindex $v 0]
        set viewfiles($n) [lindex $v 1]
        set viewperm($n) 1
-       .bar.view add radiobutton -label $viewname($n) \
-           -command [list showview $n] -variable selectedview -value $n
+       addviewmenu $n
     }
 }
 getcommits