X-Git-Url: https://git.octo.it/?a=blobdiff_plain;f=gitk;h=101cf9bd9ff8c3b8180ab50e6ceb4655576f9fbf;hb=b3ca4e4ebba6915ea534c4b82cfc5d6f10b4c283;hp=fa1e83c494ea6da8ba397d7c0314abd250ef3487;hpb=4c61b7d15a6215fa4dffa33c37c3ef9df80d3f67;p=git.git

diff --git a/gitk b/gitk
index fa1e83c4..101cf9bd 100755
--- a/gitk
+++ b/gitk
@@ -16,98 +16,112 @@ proc gitdir {} {
     }
 }
 
-proc parse_args {rargs} {
-    global parsed_args
-
-    if {[catch {
-	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
-    }
-    return $parsed_args
-}
-
-proc start_rev_list {rlargs} {
+proc start_rev_list {view} {
     global startmsecs nextupdate ncmupdate
     global commfd leftover tclencoding datemode
+    global viewargs viewfiles commitidx
 
     set startmsecs [clock clicks -milliseconds]
     set nextupdate [expr {$startmsecs + 100}]
     set ncmupdate 1
-    initlayout
+    set commitidx($view) 0
+    set args $viewargs($view)
+    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 $rlargs] 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"
+	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 getcommits {rargs} {
-    global phase canv mainfont
+proc stop_rev_list {} {
+    global commfd curview
+
+    if {![info exists commfd($curview)]} return
+    set fd $commfd($curview)
+    catch {
+	set pid [pid $fd]
+	exec kill $pid
+    }
+    catch {close $fd}
+    unset commfd($curview)
+}
+
+proc getcommits {} {
+    global phase canv mainfont curview
 
     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
+    initlayout
+    start_rev_list $curview
+    show_status "Reading commits..."
 }
 
-proc getcommitlines {commfd}  {
+proc getcommitlines {fd view}  {
     global commitlisted nextupdate
-    global leftover
+    global leftover commfd
     global displayorder commitidx commitrow commitdata
+    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 $fd]} return
+	global viewname
+	unset commfd($view)
+	notbusy $view
 	# set it blocking so we wait for the process to terminate
-	fconfigure $commfd -blocking 1
-	if {![catch {close $commfd} err]} {
-	    after idle finishcommits
-	    return
+	fconfigure $fd -blocking 1
+	if {[catch {close $fd} err]} {
+	    set fv {}
+	    if {$view != $curview} {
+		set fv " for the \"$viewname($view)\" view"
+	    }
+	    if {[string range $err 0 4] == "usage"} {
+		set err "Gitk: error reading commits$fv:\
+			bad arguments to git rev-list."
+		if {$viewname($view) eq "Command line"} {
+		    append err \
+			"  (Note: arguments to gitk are passed to git rev-list\
+			 to allow selection of commits to be displayed.)"
+		}
+	    } else {
+		set err "Error reading commits$fv: $err"
+	    }
+	    error_popup $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.)"
-	} else {
-	    set err "Error reading commits: $err"
+	if {$view == $curview} {
+	    after idle finishcommits
 	}
-	error_popup $err
-	exit 1
+	return
     }
     set start 0
     set gotsome 0
     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}]]
 	}
@@ -134,36 +148,58 @@ proc getcommitlines {commfd}  {
 	    if {[string length $shortcmit] > 80} {
 		set shortcmit "[string range $shortcmit 0 80]..."
 	    }
-	    error_popup "Can't parse git-rev-list output: {$shortcmit}"
+	    error_popup "Can't parse git rev-list output: {$shortcmit}"
 	    exit 1
 	}
 	set id [lindex $ids 0]
 	if {$listed} {
 	    set olds [lrange $ids 1 end]
-	    set commitlisted($id) 1
+	    set i 0
+	    foreach p $olds {
+		if {$i == 0 || [lsearch -exact $olds $p] >= $i} {
+		    lappend children($view,$p) $id
+		}
+		incr i
+	    }
 	} else {
 	    set olds {}
 	}
-	updatechildren $id $olds
+	if {![info exists children($view,$id)]} {
+	    set children($view,$id) {}
+	}
 	set commitdata($id) [string range $cmit [expr {$j + 1}] end]
-	set commitrow($id) $commitidx
-	incr commitidx
-	lappend displayorder $id
+	set commitrow($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}]
@@ -174,50 +210,34 @@ 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]
     }
 }
 
 proc readcommit {id} {
-    if {[catch {set contents [exec git-cat-file commit $id]}]} return
-    updatechildren $id {}
+    if {[catch {set contents [exec git cat-file commit $id]}]} return
     parsecommit $id $contents 0
 }
 
-proc updatecommits {rargs} {
-    stopfindproc
-    foreach v {children nchildren parents nparents commitlisted
-	colormap selectedline matchinglines treediffs
-	mergefilelist currentid rowtextx commitrow
-	rowidlist rowoffsets idrowranges idrangedrawn iddrawn
-	linesegends crossings cornercrossings} {
-	global $v
-	catch {unset $v}
-    }
-    allcanvs delete all
-    readrefs
-    getcommits $rargs
-}
-
-proc updatechildren {id olds} {
-    global children nchildren parents nparents
+proc updatecommits {} {
+    global viewdata curview phase displayorder
+    global children commitrow
 
-    if {![info exists nchildren($id)]} {
-	set children($id) {}
-	set nchildren($id) 0
+    if {$phase ne {}} {
+	stop_rev_list
+	set phase {}
     }
-    set parents($id) $olds
-    set nparents($id) [llength $olds]
-    foreach p $olds {
-	if {![info exists nchildren($p)]} {
-	    set children($p) [list $id]
-	    set nchildren($p) 1
-	} elseif {[lsearch -exact $children($p) $id] < 0} {
-	    lappend children($p) $id
-	    incr nchildren($p)
-	}
+    set n $curview
+    foreach id $displayorder {
+	catch {unset children($n,$id)}
+	catch {unset commitrow($n,$id)}
     }
+    set curview -1
+    catch {unset viewdata($n)}
+    readrefs
+    showview $n
 }
 
 proc parsecommit {id contents listed} {
@@ -256,8 +276,8 @@ proc parsecommit {id contents listed} {
 	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
+	# 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 "    "
@@ -274,7 +294,7 @@ proc parsecommit {id contents listed} {
 }
 
 proc getcommit {id} {
-    global commitdata commitinfo nparents
+    global commitdata commitinfo
 
     if {[info exists commitdata($id)]} {
 	parsecommit $id $commitdata($id) 1
@@ -282,7 +302,6 @@ proc getcommit {id} {
 	readcommit $id
 	if {![info exists commitinfo($id)]} {
 	    set commitinfo($id) {"No commit information available"}
-	    set nparents($id) 0
 	}
     }
     return 1
@@ -295,16 +314,22 @@ proc readrefs {} {
     foreach v {tagids idtags headids idheads otherrefids idotherrefs} {
 	catch {unset $v}
     }
-    set refd [open [list | git-ls-remote [gitdir]] r]
+    set refd [open [list | git ls-remote [gitdir]] r]
     while {0 <= [set n [gets $refd line]]} {
 	if {![regexp {^([0-9a-f]{40})	refs/([^^]*)$} $line \
 	    match id path]} {
 	    continue
 	}
+	if {[regexp {^remotes/.*/HEAD$} $path match]} {
+	    continue
+	}
 	if {![regexp {^(tags|heads)/(.*)$} $path match type name]} {
 	    set type others
 	    set name $path
 	}
+	if {[regexp {^remotes/} $path match]} {
+	    set type heads
+	}
 	if {$type == "tags"} {
 	    set tagids($name) $id
 	    lappend idtags($id) $name
@@ -312,14 +337,14 @@ proc readrefs {} {
 	    set type {}
 	    set tag {}
 	    catch {
-		set commit [exec git-rev-parse "$id^0"]
+		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 "$id"]
+	        set tagcontents($name) [exec git cat-file tag "$id"]
 	    }
 	} elseif { $type == "heads" } {
 	    set headids($name) $id
@@ -332,38 +357,65 @@ proc readrefs {} {
     close $refd
 }
 
+proc show_error {w top msg} {
+    message $w.m -text $msg -justify center -aspect 400
+    pack $w.m -side top -fill x -padx 20 -pady 20
+    button $w.ok -text OK -command "destroy $top"
+    pack $w.ok -side bottom -fill x
+    bind $top <Visibility> "grab $top; focus $top"
+    bind $top <Key-Return> "destroy $top"
+    tkwait window $top
+}
+
 proc error_popup msg {
     set w .error
     toplevel $w
     wm transient $w .
-    message $w.m -text $msg -justify center -aspect 400
-    pack $w.m -side top -fill x -padx 20 -pady 20
-    button $w.ok -text OK -command "destroy $w"
-    pack $w.ok -side bottom -fill x
-    bind $w <Visibility> "grab $w; focus $w"
-    bind $w <Key-Return> "destroy $w"
-    tkwait window $w
+    show_error $w $w $msg
 }
 
-proc makewindow {rargs} {
-    global canv canv2 canv3 linespc charspc ctext cflist textfont
+proc makewindow {} {
+    global canv canv2 canv3 linespc charspc ctext cflist
+    global textfont mainfont uifont
     global findtype findtypemenu findloc findstring fstring geometry
     global entries sha1entry sha1string sha1but
     global maincursor textcursor curtextcursor
-    global rowctxmenu mergemax
+    global rowctxmenu mergemax wrapcomment
 
     menu .bar
     .bar add cascade -label "File" -menu .bar.file
+    .bar configure -font $uifont
     menu .bar.file
-    .bar.file add command -label "Update" -command [list updatecommits $rargs]
+    .bar.file add command -label "Update" -command updatecommits
     .bar.file add command -label "Reread references" -command rereadrefs
     .bar.file add command -label "Quit" -command doquit
+    .bar.file configure -font $uifont
     menu .bar.edit
     .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 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
+    .bar.help add command -label "Key bindings" -command keys
+    .bar.help configure -font $uifont
     . configure -menu .bar
 
     if {![info exists geometry(canv1)]} {
@@ -410,7 +462,7 @@ proc makewindow {rargs} {
     set entries $sha1entry
     set sha1but .ctop.top.bar.sha1label
     button $sha1but -text "SHA1 ID: " -state disabled -relief flat \
-	-command gotocommit -width 8
+	-command gotocommit -width 8 -font $uifont
     $sha1but conf -disabledforeground [$sha1but cget -foreground]
     pack .ctop.top.bar.sha1label -side left
     entry $sha1entry -width 40 -font $textfont -textvariable sha1string
@@ -440,19 +492,24 @@ proc makewindow {rargs} {
 	-state disabled -width 26
     pack .ctop.top.bar.rightbut -side left -fill y
 
-    button .ctop.top.bar.findbut -text "Find" -command dofind
+    button .ctop.top.bar.findbut -text "Find" -command dofind -font $uifont
     pack .ctop.top.bar.findbut -side left
     set findstring {}
     set fstring .ctop.top.bar.findstring
     lappend entries $fstring
-    entry $fstring -width 30 -font $textfont -textvariable findstring
+    entry $fstring -width 30 -font $textfont -textvariable findstring -font $textfont
     pack $fstring -side left -expand 1 -fill x
     set findtype Exact
     set findtypemenu [tk_optionMenu .ctop.top.bar.findtype \
 			  findtype Exact IgnCase Regexp]
+    .ctop.top.bar.findtype configure -font $uifont
+    .ctop.top.bar.findtype.menu configure -font $uifont
     set findloc "All fields"
     tk_optionMenu .ctop.top.bar.findloc findloc "All fields" Headline \
 	Comments Author Committer Files Pickaxe
+    .ctop.top.bar.findloc configure -font $uifont
+    .ctop.top.bar.findloc.menu configure -font $uifont
+
     pack .ctop.top.bar.findloc -side right
     pack .ctop.top.bar.findtype -side right
     # for making sure type==Exact whenever loc==Pickaxe
@@ -464,12 +521,13 @@ proc makewindow {rargs} {
     set ctext .ctop.cdet.left.ctext
     text $ctext -bg white -state disabled -font $textfont \
 	-width $geometry(ctextw) -height $geometry(ctexth) \
-	-yscrollcommand ".ctop.cdet.left.sb set" -wrap none
+	-yscrollcommand {.ctop.cdet.left.sb set} -wrap none
     scrollbar .ctop.cdet.left.sb -command "$ctext yview"
     pack .ctop.cdet.left.sb -side right -fill y
     pack $ctext -side left -fill both -expand 1
     .ctop.cdet add .ctop.cdet.left
 
+    $ctext tag conf comment -wrap $wrapcomment
     $ctext tag conf filesep -font [concat $textfont bold] -back "#aaaaaa"
     $ctext tag conf hunksep -fore blue
     $ctext tag conf d0 -fore red
@@ -497,12 +555,25 @@ proc makewindow {rargs} {
     $ctext tag conf found -back yellow
 
     frame .ctop.cdet.right
+    frame .ctop.cdet.right.mode
+    radiobutton .ctop.cdet.right.mode.patch -text "Patch" \
+	-command reselectline -variable cmitmode -value "patch"
+    radiobutton .ctop.cdet.right.mode.tree -text "Tree" \
+	-command reselectline -variable cmitmode -value "tree"
+    grid .ctop.cdet.right.mode.patch .ctop.cdet.right.mode.tree -sticky ew
+    pack .ctop.cdet.right.mode -side top -fill x
     set cflist .ctop.cdet.right.cfiles
-    listbox $cflist -bg white -selectmode extended -width $geometry(cflistw) \
-	-yscrollcommand ".ctop.cdet.right.sb set"
+    set indent [font measure $mainfont "nn"]
+    text $cflist -width $geometry(cflistw) -background white -font $mainfont \
+	-tabs [list $indent [expr {2 * $indent}]] \
+	-yscrollcommand ".ctop.cdet.right.sb set" \
+	-cursor [. cget -cursor] \
+	-spacing1 1 -spacing3 1
     scrollbar .ctop.cdet.right.sb -command "$cflist yview"
     pack .ctop.cdet.right.sb -side right -fill y
     pack $cflist -side left -fill both -expand 1
+    $cflist tag configure highlight \
+	-background [$cflist cget -selectbackground]
     .ctop.cdet add .ctop.cdet.right
     bind .ctop.cdet <Configure> {resizecdetpanes %W %w}
 
@@ -514,12 +585,20 @@ proc makewindow {rargs} {
     bindall <ButtonRelease-5> "allcanvs yview scroll 5 units"
     bindall <2> "canvscan mark %W %x %y"
     bindall <B2-Motion> "canvscan dragto %W %x %y"
+    bindkey <Home> selfirstline
+    bindkey <End> sellastline
     bind . <Key-Up> "selnextline -1"
     bind . <Key-Down> "selnextline 1"
-    bind . <Key-Right> "goforw"
-    bind . <Key-Left> "goback"
-    bind . <Key-Prior> "allcanvs yview scroll -1 pages"
-    bind . <Key-Next> "allcanvs yview scroll 1 pages"
+    bindkey <Key-Right> "goforw"
+    bindkey <Key-Left> "goback"
+    bind . <Key-Prior> "selnextpage -1"
+    bind . <Key-Next> "selnextpage 1"
+    bind . <Control-Home> "allcanvs yview moveto 0.0"
+    bind . <Control-End> "allcanvs yview moveto 1.0"
+    bind . <Control-Key-Up> "allcanvs yview scroll -1 units"
+    bind . <Control-Key-Down> "allcanvs yview scroll 1 units"
+    bind . <Control-Key-Prior> "allcanvs yview scroll -1 pages"
+    bind . <Control-Key-Next> "allcanvs yview scroll 1 pages"
     bindkey <Key-Delete> "$ctext yview scroll -1 pages"
     bindkey <Key-BackSpace> "$ctext yview scroll -1 pages"
     bindkey <Key-space> "$ctext yview scroll 1 pages"
@@ -546,12 +625,14 @@ proc makewindow {rargs} {
     bind . <Control-KP_Add> {incrfont 1}
     bind . <Control-minus> {incrfont -1}
     bind . <Control-KP_Subtract> {incrfont -1}
-    bind $cflist <<ListboxSelect>> listboxsel
     bind . <Destroy> {savestuff %W}
     bind . <Button-1> "click %W"
     bind $fstring <Key-Return> dofind
     bind $sha1entry <Key-Return> gotocommit
     bind $sha1entry <<PasteSelection>> clearsha1
+    bind $cflist <1> {sel_flist %W %x %y; break}
+    bind $cflist <B1-Motion> {sel_flist %W %x %y; break}
+    bind $cflist <ButtonRelease-1> {treeclick %W %x %y}
 
     set maincursor [. cget -cursor]
     set textcursor [$ctext cget -cursor]
@@ -612,9 +693,11 @@ proc click {w} {
 }
 
 proc savestuff {w} {
-    global canv canv2 canv3 ctext cflist mainfont textfont
+    global canv canv2 canv3 ctext cflist mainfont textfont uifont
     global stuffsaved findmergefiles maxgraphpct
     global maxwidth
+    global viewname viewfiles viewargs viewperm nextviewnum
+    global cmitmode wrapcomment
 
     if {$stuffsaved} return
     if {![winfo viewable .]} return
@@ -622,9 +705,12 @@ proc savestuff {w} {
 	set f [open "~/.gitk-new" w]
 	puts $f [list set mainfont $mainfont]
 	puts $f [list set textfont $textfont]
+	puts $f [list set uifont $uifont]
 	puts $f [list set findmergefiles $findmergefiles]
 	puts $f [list set maxgraphpct $maxgraphpct]
 	puts $f [list set maxwidth $maxwidth]
+	puts $f [list set cmitmode $cmitmode]
+	puts $f [list set wrapcomment $wrapcomment]
 	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}]"
@@ -637,6 +723,13 @@ proc savestuff {w} {
 	set wid [expr {([winfo width $cflist] - 11) \
 			   / [font measure [$cflist cget -font] "0"]}]
 	puts $f "set geometry(cflistw) $wid"
+	puts -nonewline $f "set permviews {"
+	for {set v 0} {$v < $nextviewnum} {incr v} {
+	    if {$viewperm($v)} {
+		puts $f "{[list $viewname($v) $viewfiles($v) $viewargs($v)]}"
+	    }
+	}
+	puts $f "}"
 	close $f
 	file rename -force "~/.gitk-new" "~/.gitk"
     }
@@ -729,6 +822,803 @@ Use and redistribute under the terms of the GNU General Public License} \
     pack $w.ok -side bottom
 }
 
+proc keys {} {
+    set w .keys
+    if {[winfo exists $w]} {
+	raise $w
+	return
+    }
+    toplevel $w
+    wm title $w "Gitk key bindings"
+    message $w.m -text {
+Gitk key bindings:
+
+<Ctrl-Q>		Quit
+<Home>		Move to first commit
+<End>		Move to last commit
+<Up>, p, i	Move up one commit
+<Down>, n, k	Move down one commit
+<Left>, z, j	Go back in history list
+<Right>, x, l	Go forward in history list
+<PageUp>	Move up one page in commit list
+<PageDown>	Move down one page in commit list
+<Ctrl-Home>	Scroll to top of commit list
+<Ctrl-End>	Scroll to bottom of commit list
+<Ctrl-Up>	Scroll commit list up one line
+<Ctrl-Down>	Scroll commit list down one line
+<Ctrl-PageUp>	Scroll commit list up one page
+<Ctrl-PageDown>	Scroll commit list down one page
+<Delete>, b	Scroll diff view up one page
+<Backspace>	Scroll diff view up one page
+<Space>		Scroll diff view down one page
+u		Scroll diff view up 18 lines
+d		Scroll diff view down 18 lines
+<Ctrl-F>		Find
+<Ctrl-G>		Move to next find hit
+<Ctrl-R>		Move to previous find hit
+<Return>	Move to next find hit
+/		Move to next find hit, or redo find
+?		Move to previous find hit
+f		Scroll diff view to next file
+<Ctrl-KP+>	Increase font size
+<Ctrl-plus>	Increase font size
+<Ctrl-KP->	Decrease font size
+<Ctrl-minus>	Decrease font size
+} \
+	    -justify left -bg white -border 2 -relief sunken
+    pack $w.m -side top -fill both
+    button $w.ok -text Close -command "destroy $w"
+    pack $w.ok -side bottom
+}
+
+# Procedures for manipulating the file list window at the
+# bottom right of the overall window.
+
+proc treeview {w l openlevs} {
+    global treecontents treediropen treeheight treeparent treeindex
+
+    set ix 0
+    set treeindex() 0
+    set lev 0
+    set prefix {}
+    set prefixend -1
+    set prefendstack {}
+    set htstack {}
+    set ht 0
+    set treecontents() {}
+    $w conf -state normal
+    foreach f $l {
+	while {[string range $f 0 $prefixend] ne $prefix} {
+	    if {$lev <= $openlevs} {
+		$w mark set e:$treeindex($prefix) "end -1c"
+		$w mark gravity e:$treeindex($prefix) left
+	    }
+	    set treeheight($prefix) $ht
+	    incr ht [lindex $htstack end]
+	    set htstack [lreplace $htstack end end]
+	    set prefixend [lindex $prefendstack end]
+	    set prefendstack [lreplace $prefendstack end end]
+	    set prefix [string range $prefix 0 $prefixend]
+	    incr lev -1
+	}
+	set tail [string range $f [expr {$prefixend+1}] end]
+	while {[set slash [string first "/" $tail]] >= 0} {
+	    lappend htstack $ht
+	    set ht 0
+	    lappend prefendstack $prefixend
+	    incr prefixend [expr {$slash + 1}]
+	    set d [string range $tail 0 $slash]
+	    lappend treecontents($prefix) $d
+	    set oldprefix $prefix
+	    append prefix $d
+	    set treecontents($prefix) {}
+	    set treeindex($prefix) [incr ix]
+	    set treeparent($prefix) $oldprefix
+	    set tail [string range $tail [expr {$slash+1}] end]
+	    if {$lev <= $openlevs} {
+		set ht 1
+		set treediropen($prefix) [expr {$lev < $openlevs}]
+		set bm [expr {$lev == $openlevs? "tri-rt": "tri-dn"}]
+		$w mark set d:$ix "end -1c"
+		$w mark gravity d:$ix left
+		set str "\n"
+		for {set i 0} {$i < $lev} {incr i} {append str "\t"}
+		$w insert end $str
+		$w image create end -align center -image $bm -padx 1 \
+		    -name a:$ix
+		$w insert end $d
+		$w mark set s:$ix "end -1c"
+		$w mark gravity s:$ix left
+	    }
+	    incr lev
+	}
+	if {$tail ne {}} {
+	    if {$lev <= $openlevs} {
+		incr ht
+		set str "\n"
+		for {set i 0} {$i < $lev} {incr i} {append str "\t"}
+		$w insert end $str
+		$w insert end $tail
+	    }
+	    lappend treecontents($prefix) $tail
+	}
+    }
+    while {$htstack ne {}} {
+	set treeheight($prefix) $ht
+	incr ht [lindex $htstack end]
+	set htstack [lreplace $htstack end end]
+    }
+    $w conf -state disabled
+}
+
+proc linetoelt {l} {
+    global treeheight treecontents
+
+    set y 2
+    set prefix {}
+    while {1} {
+	foreach e $treecontents($prefix) {
+	    if {$y == $l} {
+		return "$prefix$e"
+	    }
+	    set n 1
+	    if {[string index $e end] eq "/"} {
+		set n $treeheight($prefix$e)
+		if {$y + $n > $l} {
+		    append prefix $e
+		    incr y
+		    break
+		}
+	    }
+	    incr y $n
+	}
+    }
+}
+
+proc treeclosedir {w dir} {
+    global treediropen treeheight treeparent treeindex
+
+    set ix $treeindex($dir)
+    $w conf -state normal
+    $w delete s:$ix e:$ix
+    set treediropen($dir) 0
+    $w image configure a:$ix -image tri-rt
+    $w conf -state disabled
+    set n [expr {1 - $treeheight($dir)}]
+    while {$dir ne {}} {
+	incr treeheight($dir) $n
+	set dir $treeparent($dir)
+    }
+}
+
+proc treeopendir {w dir} {
+    global treediropen treeheight treeparent treecontents treeindex
+
+    set ix $treeindex($dir)
+    $w conf -state normal
+    $w image configure a:$ix -image tri-dn
+    $w mark set e:$ix s:$ix
+    $w mark gravity e:$ix right
+    set lev 0
+    set str "\n"
+    set n [llength $treecontents($dir)]
+    for {set x $dir} {$x ne {}} {set x $treeparent($x)} {
+	incr lev
+	append str "\t"
+	incr treeheight($x) $n
+    }
+    foreach e $treecontents($dir) {
+	if {[string index $e end] eq "/"} {
+	    set de $dir$e
+	    set iy $treeindex($de)
+	    $w mark set d:$iy e:$ix
+	    $w mark gravity d:$iy left
+	    $w insert e:$ix $str
+	    set treediropen($de) 0
+	    $w image create e:$ix -align center -image tri-rt -padx 1 \
+		-name a:$iy
+	    $w insert e:$ix $e
+	    $w mark set s:$iy e:$ix
+	    $w mark gravity s:$iy left
+	    set treeheight($de) 1
+	} else {
+	    $w insert e:$ix $str
+	    $w insert e:$ix $e
+	}
+    }
+    $w mark gravity e:$ix left
+    $w conf -state disabled
+    set treediropen($dir) 1
+    set top [lindex [split [$w index @0,0] .] 0]
+    set ht [$w cget -height]
+    set l [lindex [split [$w index s:$ix] .] 0]
+    if {$l < $top} {
+	$w yview $l.0
+    } elseif {$l + $n + 1 > $top + $ht} {
+	set top [expr {$l + $n + 2 - $ht}]
+	if {$l < $top} {
+	    set top $l
+	}
+	$w yview $top.0
+    }
+}
+
+proc treeclick {w x y} {
+    global treediropen cmitmode ctext cflist cflist_top
+
+    if {$cmitmode ne "tree"} return
+    if {![info exists cflist_top]} return
+    set l [lindex [split [$w index "@$x,$y"] "."] 0]
+    $cflist tag remove highlight $cflist_top.0 "$cflist_top.0 lineend"
+    $cflist tag add highlight $l.0 "$l.0 lineend"
+    set cflist_top $l
+    if {$l == 1} {
+	$ctext yview 1.0
+	return
+    }
+    set e [linetoelt $l]
+    if {[string index $e end] ne "/"} {
+	showfile $e
+    } elseif {$treediropen($e)} {
+	treeclosedir $w $e
+    } else {
+	treeopendir $w $e
+    }
+}
+
+proc setfilelist {id} {
+    global treefilelist cflist
+
+    treeview $cflist $treefilelist($id) 0
+}
+
+image create bitmap tri-rt -background black -foreground blue -data {
+    #define tri-rt_width 13
+    #define tri-rt_height 13
+    static unsigned char tri-rt_bits[] = {
+       0x00, 0x00, 0x00, 0x00, 0x10, 0x00, 0x30, 0x00, 0x70, 0x00, 0xf0, 0x00,
+       0xf0, 0x01, 0xf0, 0x00, 0x70, 0x00, 0x30, 0x00, 0x10, 0x00, 0x00, 0x00,
+       0x00, 0x00};
+} -maskdata {
+    #define tri-rt-mask_width 13
+    #define tri-rt-mask_height 13
+    static unsigned char tri-rt-mask_bits[] = {
+       0x08, 0x00, 0x18, 0x00, 0x38, 0x00, 0x78, 0x00, 0xf8, 0x00, 0xf8, 0x01,
+       0xf8, 0x03, 0xf8, 0x01, 0xf8, 0x00, 0x78, 0x00, 0x38, 0x00, 0x18, 0x00,
+       0x08, 0x00};
+}
+image create bitmap tri-dn -background black -foreground blue -data {
+    #define tri-dn_width 13
+    #define tri-dn_height 13
+    static unsigned char tri-dn_bits[] = {
+       0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xfc, 0x07, 0xf8, 0x03,
+       0xf0, 0x01, 0xe0, 0x00, 0x40, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+       0x00, 0x00};
+} -maskdata {
+    #define tri-dn-mask_width 13
+    #define tri-dn-mask_height 13
+    static unsigned char tri-dn-mask_bits[] = {
+       0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xff, 0x1f, 0xfe, 0x0f, 0xfc, 0x07,
+       0xf8, 0x03, 0xf0, 0x01, 0xe0, 0x00, 0x40, 0x00, 0x00, 0x00, 0x00, 0x00,
+       0x00, 0x00};
+}
+
+proc init_flist {first} {
+    global cflist cflist_top selectedline difffilestart
+
+    $cflist conf -state normal
+    $cflist delete 0.0 end
+    if {$first ne {}} {
+	$cflist insert end $first
+	set cflist_top 1
+	$cflist tag add highlight 1.0 "1.0 lineend"
+    } else {
+	catch {unset cflist_top}
+    }
+    $cflist conf -state disabled
+    set difffilestart {}
+}
+
+proc add_flist {fl} {
+    global flistmode cflist
+
+    $cflist conf -state normal
+    if {$flistmode eq "flat"} {
+	foreach f $fl {
+	    $cflist insert end "\n$f"
+	}
+    }
+    $cflist conf -state disabled
+}
+
+proc sel_flist {w x y} {
+    global flistmode ctext difffilestart cflist cflist_top cmitmode
+
+    if {$cmitmode eq "tree"} return
+    if {![info exists cflist_top]} return
+    set l [lindex [split [$w index "@$x,$y"] "."] 0]
+    $cflist tag remove highlight $cflist_top.0 "$cflist_top.0 lineend"
+    $cflist tag add highlight $l.0 "$l.0 lineend"
+    set cflist_top $l
+    if {$l == 1} {
+	$ctext yview 1.0
+    } else {
+	catch {$ctext yview [lindex $difffilestart [expr {$l - 2}]]}
+    }
+}
+
+# Functions for adding and removing shell-type quoting
+
+proc shellquote {str} {
+    if {![string match "*\['\"\\ \t]*" $str]} {
+	return $str
+    }
+    if {![string match "*\['\"\\]*" $str]} {
+	return "\"$str\""
+    }
+    if {![string match "*'*" $str]} {
+	return "'$str'"
+    }
+    return "\"[string map {\" \\\" \\ \\\\} $str]\""
+}
+
+proc shellarglist {l} {
+    set str {}
+    foreach a $l {
+	if {$str ne {}} {
+	    append str " "
+	}
+	append str [shellquote $a]
+    }
+    return $str
+}
+
+proc shelldequote {str} {
+    set ret {}
+    set used -1
+    while {1} {
+	incr used
+	if {![regexp -start $used -indices "\['\"\\\\ \t]" $str first]} {
+	    append ret [string range $str $used end]
+	    set used [string length $str]
+	    break
+	}
+	set first [lindex $first 0]
+	set ch [string index $str $first]
+	if {$first > $used} {
+	    append ret [string range $str $used [expr {$first - 1}]]
+	    set used $first
+	}
+	if {$ch eq " " || $ch eq "\t"} break
+	incr used
+	if {$ch eq "'"} {
+	    set first [string first "'" $str $used]
+	    if {$first < 0} {
+		error "unmatched single-quote"
+	    }
+	    append ret [string range $str $used [expr {$first - 1}]]
+	    set used $first
+	    continue
+	}
+	if {$ch eq "\\"} {
+	    if {$used >= [string length $str]} {
+		error "trailing backslash"
+	    }
+	    append ret [string index $str $used]
+	    continue
+	}
+	# here ch == "\""
+	while {1} {
+	    if {![regexp -start $used -indices "\[\"\\\\]" $str first]} {
+		error "unmatched double-quote"
+	    }
+	    set first [lindex $first 0]
+	    set ch [string index $str $first]
+	    if {$first > $used} {
+		append ret [string range $str $used [expr {$first - 1}]]
+		set used $first
+	    }
+	    if {$ch eq "\""} break
+	    incr used
+	    append ret [string index $str $used]
+	    incr used
+	}
+    }
+    return [list $used $ret]
+}
+
+proc shellsplit {str} {
+    set l {}
+    while {1} {
+	set str [string trimleft $str]
+	if {$str eq {}} break
+	set dq [shelldequote $str]
+	set n [lindex $dq 0]
+	set word [lindex $dq 1]
+	set str [string range $str $n end]
+	lappend l $word
+    }
+    return $l
+}
+
+# Code to implement multiple views
+
+proc newview {ishighlight} {
+    global nextviewnum newviewname newviewperm uifont newishighlight
+    global newviewargs revtreeargs
+
+    set newishighlight $ishighlight
+    set top .gitkview
+    if {[winfo exists $top]} {
+	raise $top
+	return
+    }
+    set newviewname($nextviewnum) "View $nextviewnum"
+    set newviewperm($nextviewnum) 0
+    set newviewargs($nextviewnum) [shellarglist $revtreeargs]
+    vieweditor $top $nextviewnum "Gitk view definition" 
+}
+
+proc editview {} {
+    global curview
+    global viewname viewperm newviewname newviewperm
+    global viewargs newviewargs
+
+    set top .gitkvedit-$curview
+    if {[winfo exists $top]} {
+	raise $top
+	return
+    }
+    set newviewname($curview) $viewname($curview)
+    set newviewperm($curview) $viewperm($curview)
+    set newviewargs($curview) [shellarglist $viewargs($curview)]
+    vieweditor $top $curview "Gitk: edit view $viewname($curview)"
+}
+
+proc vieweditor {top n title} {
+    global newviewname newviewperm viewfiles
+    global uifont
+
+    toplevel $top
+    wm title $top $title
+    label $top.nl -text "Name" -font $uifont
+    entry $top.name -width 20 -textvariable newviewname($n)
+    grid $top.nl $top.name -sticky w -pady 5
+    checkbutton $top.perm -text "Remember this view" -variable newviewperm($n)
+    grid $top.perm - -pady 5 -sticky w
+    message $top.al -aspect 1000 -font $uifont \
+	-text "Commits to include (arguments to git rev-list):"
+    grid $top.al - -sticky w -pady 5
+    entry $top.args -width 50 -textvariable newviewargs($n) \
+	-background white
+    grid $top.args - -sticky ew -padx 5
+    message $top.l -aspect 1000 -font $uifont \
+	-text "Enter files and directories to include, one per line:"
+    grid $top.l - -sticky w
+    text $top.t -width 40 -height 10 -background white
+    if {[info exists viewfiles($n)]} {
+	foreach f $viewfiles($n) {
+	    $top.t insert end $f
+	    $top.t insert end "\n"
+	}
+	$top.t delete {end - 1c} end
+	$top.t mark set insert 0.0
+    }
+    grid $top.t - -sticky ew -padx 5
+    frame $top.buts
+    button $top.buts.ok -text "OK" -command [list newviewok $top $n]
+    button $top.buts.can -text "Cancel" -command [list destroy $top]
+    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
+    focus $top.t
+}
+
+proc doviewmenu {m first cmd op args} {
+    set nmenu [$m index end]
+    for {set i $first} {$i <= $nmenu} {incr i} {
+	if {[$m entrycget $i -command] eq $cmd} {
+	    eval $m $op $i $args
+	    break
+	}
+    }
+}
+
+proc allviewmenus {n op args} {
+    doviewmenu .bar.view 7 [list showview $n] $op $args
+    doviewmenu .bar.view.hl 3 [list addhighlight $n] $op $args
+}
+
+proc newviewok {top n} {
+    global nextviewnum newviewperm newviewname newishighlight
+    global viewname viewfiles viewperm selectedview curview
+    global viewargs newviewargs
+
+    if {[catch {
+	set newargs [shellsplit $newviewargs($n)]
+    } err]} {
+	error_popup "Error in commit selection arguments: $err"
+	wm raise $top
+	focus $top
+	return
+    }
+    set files {}
+    foreach f [split [$top.t get 0.0 end] "\n"] {
+	set ft [string trim $f]
+	if {$ft ne {}} {
+	    lappend files $ft
+	}
+    }
+    if {![info exists viewfiles($n)]} {
+	# creating a new view
+	incr nextviewnum
+	set viewname($n) $newviewname($n)
+	set viewperm($n) $newviewperm($n)
+	set viewfiles($n) $files
+	set viewargs($n) $newargs
+	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)
+	    allviewmenus $n entryconf -label $viewname($n)
+	}
+	if {$files ne $viewfiles($n) || $newargs ne $viewargs($n)} {
+	    set viewfiles($n) $files
+	    set viewargs($n) $newargs
+	    if {$curview == $n} {
+		after idle updatecommits
+	    }
+	}
+    }
+    catch {destroy $top}
+}
+
+proc delview {} {
+    global curview viewdata viewperm
+
+    if {$curview == 0} return
+    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
+
+    set ret {}
+    foreach i [array names $var] {
+	lappend ret $i [set $var\($i\)]
+    }
+    return $ret
+}
+
+proc unflatten {var l} {
+    global $var
+
+    catch {unset $var}
+    foreach {i v} $l {
+	set $var\($i\) $v
+    }
+}
+
+proc showview {n} {
+    global curview viewdata viewfiles
+    global displayorder parentlist childlist rowidlist rowoffsets
+    global colormap rowtextx commitrow nextcolor canvxmax
+    global numcommits rowrangelist commitlisted idrowranges
+    global selectedline currentid canv canvy0
+    global matchinglines treediffs
+    global pending_select phase
+    global commitidx rowlaidout rowoptim linesegends
+    global commfd nextupdate
+    global selectedview hlview selectedhlview
+    global vparentlist vchildlist vdisporder vcmitlisted
+
+    if {$n == $curview} return
+    set selid {}
+    if {[info exists selectedline]} {
+	set selid $currentid
+	set y [yc $selectedline]
+	set ymax [lindex [$canv cget -scrollregion] 3]
+	set span [$canv yview]
+	set ytop [expr {[lindex $span 0] * $ymax}]
+	set ybot [expr {[lindex $span 1] * $ymax}]
+	if {$ytop < $y && $y < $ybot} {
+	    set yscreen [expr {$y - $ytop}]
+	} else {
+	    set yscreen [expr {($ybot - $ytop) / 2}]
+	}
+    }
+    unselectline
+    normalline
+    stopfindproc
+    if {$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 $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 {} $rowidlist $rowoffsets $rowrangelist]
+	}
+    }
+    catch {unset matchinglines}
+    catch {unset treediffs}
+    clear_display
+
+    set curview $n
+    set selectedview $n
+    set selectedhlview -1
+    .bar.view entryconf 2 -state [expr {$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
+	getcommits
+	return
+    }
+
+    set v $viewdata($n)
+    set phase [lindex $v 0]
+    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}
+    } else {
+	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 $v 9]
+    }
+
+    catch {unset colormap}
+    catch {unset rowtextx}
+    set nextcolor 0
+    set canvxmax [$canv cget -width]
+    set curview $n
+    set row 0
+    setcanvscroll
+    set yf 0
+    set row 0
+    if {$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] - $yscreen}]
+	if {$ytop < 0} {
+	    set ytop 0
+	}
+	set yf [expr {$ytop * 1.0 / $ymax}]
+    }
+    allcanvs yview moveto $yf
+    drawvisible
+    selectline $row 0
+    if {$phase ne {}} {
+	if {$phase eq "getcommits"} {
+	    show_status "Reading commits..."
+	}
+	if {[info exists commfd($n)]} {
+	    layoutmore
+	} else {
+	    finishcommits
+	}
+    } elseif {$numcommits == 0} {
+	show_status "No commits selected"
+    }
+}
+
+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 {
@@ -764,20 +1654,21 @@ proc ntimes {n o} {
 }
 
 proc usedinrange {id l1 l2} {
-    global children commitrow
+    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 $children($curview,$id)
     }
-    foreach c $children($id) {
-	if {[info exists commitrow($c)]} {
-	    set r $commitrow($c)
-	    if {$l1 <= $r && $r <= $l2} {
-		return [expr {$r - $l1 + 1}]
-	    }
+    foreach c $kids {
+	set r $commitrow($curview,$c)
+	if {$l1 <= $r && $r <= $l2} {
+	    return [expr {$r - $l1 + 1}]
 	}
     }
     return 0
@@ -843,15 +1734,21 @@ proc makeuparrow {oid x y z} {
 }
 
 proc initlayout {} {
-    global rowidlist rowoffsets displayorder
+    global rowidlist rowoffsets displayorder commitlisted
     global rowlaidout rowoptim
-    global idinlist rowchk
-    global commitidx numcommits canvxmax canv
+    global idinlist rowchk rowrangelist idrowranges
+    global numcommits canvxmax canv
     global nextcolor
+    global parentlist childlist children
+    global colormap rowtextx
+    global linesegends
 
-    set commitidx 0
     set numcommits 0
     set displayorder {}
+    set commitlisted {}
+    set parentlist {}
+    set childlist {}
+    set rowrangelist {}
     set nextcolor 0
     set rowidlist {{}}
     set rowoffsets {{}}
@@ -860,6 +1757,10 @@ proc initlayout {} {
     set rowlaidout 0
     set rowoptim 0
     set canvxmax [$canv cget -width]
+    catch {unset colormap}
+    catch {unset rowtextx}
+    catch {unset idrowranges}
+    set linesegends {}
 }
 
 proc setcanvscroll {} {
@@ -892,13 +1793,12 @@ 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} {
-	checkcrossings $rowoptim $orow
 	optimize_rows $rowoptim 0 $orow
 	set rowoptim $orow
     }
@@ -909,8 +1809,8 @@ proc layoutmore {} {
 }
 
 proc showstuff {canshow} {
-    global numcommits
-    global linesegends idrowranges idrangedrawn
+    global numcommits commitrow pending_select selectedline
+    global linesegends idrowranges idrangedrawn curview
 
     if {$numcommits == 0} {
 	global phase
@@ -923,17 +1823,16 @@ proc showstuff {canshow} {
     set rows [visiblerows]
     set r0 [lindex $rows 0]
     set r1 [lindex $rows 1]
+    set selrow -1
     for {set r $row} {$r < $canshow} {incr r} {
-	if {[info exists linesegends($r)]} {
-	    foreach id $linesegends($r) {
-		set i -1
-		foreach {s e} $idrowranges($id) {
-		    incr i
-		    if {$e ne {} && $e < $numcommits && $s <= $r1 && $e >= $r0
-			&& ![info exists idrangedrawn($id,$i)]} {
-			drawlineseg $id $i
-			set idrangedrawn($id,$i) 1
-		    }
+	foreach id [lindex $linesegends [expr {$r+1}]] {
+	    set i -1
+	    foreach {s e} [rowranges $id] {
+		incr i
+		if {$e ne {} && $e < $numcommits && $s <= $r1 && $e >= $r0
+		    && ![info exists idrangedrawn($id,$i)]} {
+		    drawlineseg $id $i
+		    set idrangedrawn($id,$i) 1
 		}
 	    }
 	}
@@ -945,15 +1844,23 @@ proc showstuff {canshow} {
 	drawcmitrow $row
 	incr row
     }
+    if {[info exists pending_select] &&
+	[info exists commitrow($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
+    }
 }
 
 proc layoutrows {row endrow last} {
     global rowidlist rowoffsets displayorder
     global uparrowlen downarrowlen maxwidth mingaplen
-    global nchildren parents nparents
+    global childlist parentlist
     global idrowranges linesegends
-    global commitidx
-    global idinlist rowchk
+    global commitidx curview
+    global idinlist rowchk rowrangelist
 
     set idlist [lindex $rowidlist $row]
     set offs [lindex $rowoffsets $row]
@@ -961,17 +1868,19 @@ proc layoutrows {row endrow last} {
 	set id [lindex $displayorder $row]
 	set oldolds {}
 	set newolds {}
-	foreach p $parents($id) {
+	foreach p [lindex $parentlist $row] {
 	    if {![info exists idinlist($p)]} {
 		lappend newolds $p
 	    } elseif {!$idinlist($p)} {
 		lappend oldolds $p
 	    }
 	}
+	set lse {}
 	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)} {
@@ -983,7 +1892,7 @@ proc layoutrows {row endrow last} {
 			set offs [incrange $offs $x 1]
 			set idinlist($i) 0
 			set rm1 [expr {$row - 1}]
-			lappend linesegends($rm1) $i
+			lappend lse $i
 			lappend idrowranges($i) $rm1
 			if {[incr nev -1] <= 0} break
 			continue
@@ -994,13 +1903,14 @@ proc layoutrows {row endrow last} {
 	    lset rowidlist $row $idlist
 	    lset rowoffsets $row $offs
 	}
+	lappend linesegends $lse
 	set col [lsearch -exact $idlist $id]
 	if {$col < 0} {
 	    set col [llength $idlist]
 	    lappend idlist $id
 	    lset rowidlist $row $idlist
 	    set z {}
-	    if {$nchildren($id) > 0} {
+	    if {[lindex $childlist $row] ne {}} {
 		set z [expr {[llength [lindex $rowidlist [expr {$row-1}]]] - $col}]
 		unset idinlist($id)
 	    }
@@ -1012,9 +1922,13 @@ proc layoutrows {row endrow last} {
 	} else {
 	    unset idinlist($id)
 	}
+	set ranges {}
 	if {[info exists idrowranges($id)]} {
-	    lappend idrowranges($id) $row
+	    set ranges $idrowranges($id)
+	    lappend ranges $row
+	    unset idrowranges($id)
 	}
+	lappend rowrangelist $ranges
 	incr row
 	set offs [ntimes [llength $idlist] 0]
 	set l [llength $newolds]
@@ -1053,24 +1967,30 @@ proc layoutrows {row endrow last} {
 }
 
 proc addextraid {id row} {
-    global displayorder commitrow commitinfo nparents
-    global commitidx
+    global displayorder commitrow commitinfo
+    global commitidx commitlisted
+    global parentlist childlist children curview
 
-    incr commitidx
+    incr commitidx($curview)
     lappend displayorder $id
-    set commitrow($id) $row
+    lappend commitlisted 0
+    lappend parentlist {}
+    set commitrow($curview,$id) $row
     readcommit $id
     if {![info exists commitinfo($id)]} {
 	set commitinfo($id) {"No commit information available"}
-	set nparents($id) 0
     }
+    if {![info exists children($curview,$id)]} {
+	set children($curview,$id) {}
+    }
+    lappend childlist $children($curview,$id)
 }
 
 proc layouttail {} {
-    global rowidlist rowoffsets idinlist commitidx
-    global idrowranges
+    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}]
@@ -1078,6 +1998,8 @@ proc layouttail {} {
 	addextraid $id $row
 	unset idinlist($id)
 	lappend idrowranges($id) $row
+	lappend rowrangelist $idrowranges($id)
+	unset idrowranges($id)
 	incr row
 	set offs [ntimes $col 0]
 	set idlist [lreplace $idlist $col $col]
@@ -1091,6 +2013,8 @@ proc layouttail {} {
 	lset rowoffsets $row 0
 	makeuparrow $id 0 $row 0
 	lappend idrowranges($id) $row
+	lappend rowrangelist $idrowranges($id)
+	unset idrowranges($id)
 	incr row
 	lappend rowidlist {}
 	lappend rowoffsets {}
@@ -1107,7 +2031,7 @@ proc insert_pad {row col npad} {
 }
 
 proc optimize_rows {row col endrow} {
-    global rowidlist rowoffsets idrowranges linesegends displayorder
+    global rowidlist rowoffsets idrowranges displayorder
 
     for {} {$row < $endrow} {incr row} {
 	set idlist [lindex $rowidlist $row]
@@ -1126,8 +2050,8 @@ proc optimize_rows {row col endrow} {
 	    set z0 [lindex $rowoffsets $y0 $x0]
 	    if {$z0 eq {}} {
 		set id [lindex $idlist $col]
-		if {[info exists idrowranges($id)] &&
-		    $y0 > [lindex $idrowranges($id) 0]} {
+		set ranges [rowranges $id]
+		if {$ranges ne {} && $y0 > [lindex $ranges 0]} {
 		    set isarrow 1
 		}
 	    }
@@ -1185,8 +2109,8 @@ proc optimize_rows {row col endrow} {
 		if {$o eq {}} {
 		    # check if this is the link to the first child
 		    set id [lindex $idlist $col]
-		    if {[info exists idrowranges($id)] &&
-			$row == [lindex $idrowranges($id) 0]} {
+		    set ranges [rowranges $id]
+		    if {$ranges ne {} && $row == [lindex $ranges 0]} {
 			# it is, work out offset to child
 			set y0 [expr {$row - 1}]
 			set id [lindex $displayorder $y0]
@@ -1240,13 +2164,36 @@ proc linewidth {id} {
     return $wid
 }
 
+proc rowranges {id} {
+    global phase idrowranges commitrow rowlaidout rowrangelist curview
+
+    set ranges {}
+    if {$phase eq {} ||
+	([info exists commitrow($curview,$id)]
+	 && $commitrow($curview,$id) < $rowlaidout)} {
+	set ranges [lindex $rowrangelist $commitrow($curview,$id)]
+    } elseif {[info exists idrowranges($id)]} {
+	set ranges $idrowranges($id)
+    }
+    return $ranges
+}
+
 proc drawlineseg {id i} {
-    global rowoffsets rowidlist idrowranges
+    global rowoffsets rowidlist
     global displayorder
     global canv colormap linespc
+    global numcommits commitrow curview
 
-    set startrow [lindex $idrowranges($id) [expr {2 * $i}]]
-    set row [lindex $idrowranges($id) [expr {2 * $i + 1}]]
+    set ranges [rowranges $id]
+    set downarrow 1
+    if {[info exists commitrow($curview,$id)]
+	&& $commitrow($curview,$id) < $numcommits} {
+	set downarrow [expr {$i < [llength $ranges] / 2 - 1}]
+    } else {
+	set downarrow 1
+    }
+    set startrow [lindex $ranges [expr {2 * $i}]]
+    set row [lindex $ranges [expr {2 * $i + 1}]]
     if {$startrow == $row} return
     assigncolor $id
     set coords {}
@@ -1290,8 +2237,7 @@ proc drawlineseg {id i} {
 	}
     }
     if {[llength $coords] < 4} return
-    set last [expr {[llength $idrowranges($id)] / 2 - 1}]
-    if {$i < $last} {
+    if {$downarrow} {
 	# This line has an arrow at the lower end: check if the arrow is
 	# on a diagonal segment, and if so, work around the Tk 8.4
 	# refusal to draw arrows on diagonal lines.
@@ -1311,7 +2257,7 @@ proc drawlineseg {id i} {
 	    }
 	}
     }
-    set arrow [expr {2 * ($i > 0) + ($i < $last)}]
+    set arrow [expr {2 * ($i > 0) + $downarrow}]
     set arrow [lindex {none first last both} $arrow]
     set t [$canv create line $coords -width [linewidth $id] \
 	       -fill $colormap($id) -tags lines.$id -arrow $arrow]
@@ -1320,7 +2266,7 @@ proc drawlineseg {id i} {
 }
 
 proc drawparentlinks {id row col olds} {
-    global rowidlist canv colormap idrowranges
+    global rowidlist canv colormap
 
     set row2 [expr {$row + 1}]
     set x [xc $row $col]
@@ -1339,9 +2285,9 @@ proc drawparentlinks {id row col olds} {
 	if {$x2 > $rmx} {
 	    set rmx $x2
 	}
-	if {[info exists idrowranges($p)] &&
-	    $row2 == [lindex $idrowranges($p) 0] &&
-	    $row2 < [lindex $idrowranges($p) 1]} {
+	set ranges [rowranges $p]
+	if {$ranges ne {} && $row2 == [lindex $ranges 0]
+	    && $row2 < [lindex $ranges 1]} {
 	    # drawlineseg will do this one for us
 	    continue
 	}
@@ -1364,24 +2310,22 @@ proc drawparentlinks {id row col olds} {
 
 proc drawlines {id} {
     global colormap canv
-    global idrowranges idrangedrawn
-    global children iddrawn commitrow rowidlist
+    global idrangedrawn
+    global children iddrawn commitrow rowidlist curview
 
     $canv delete lines.$id
-    set nr [expr {[llength $idrowranges($id)] / 2}]
+    set nr [expr {[llength [rowranges $id]] / 2}]
     for {set i 0} {$i < $nr} {incr i} {
 	if {[info exists idrangedrawn($id,$i)]} {
 	    drawlineseg $id $i
 	}
     }
-    if {[info exists children($id)]} {
-	foreach child $children($id) {
-	    if {[info exists iddrawn($child)]} {
-		set row $commitrow($child)
-		set col [lsearch -exact [lindex $rowidlist $row] $child]
-		if {$col >= 0} {
-		    drawparentlinks $child $row $col [list $id]
-		}
+    foreach child $children($curview,$id) {
+	if {[info exists iddrawn($child)]} {
+	    set row $commitrow($curview,$child)
+	    set col [lsearch -exact [lindex $rowidlist $row] $child]
+	    if {$col >= 0} {
+		drawparentlinks $child $row $col [list $id]
 	    }
 	}
     }
@@ -1392,9 +2336,10 @@ 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 {[info exists commitlisted($id)]? "blue": "white"}]
+    set ofill [expr {[lindex $commitlisted $row]? "blue": "white"}]
     set x [xc $row $col]
     set y [yc $row]
     set orad [expr {$linespc / 3}]
@@ -1417,11 +2362,16 @@ 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]}]
@@ -1433,14 +2383,14 @@ proc drawcmittext {id row col rmx} {
 
 proc drawcmitrow {row} {
     global displayorder rowidlist
-    global idrowranges idrangedrawn iddrawn
-    global commitinfo commitlisted parents numcommits
+    global idrangedrawn iddrawn
+    global commitinfo parentlist numcommits
 
     if {$row >= $numcommits} return
     foreach id [lindex $rowidlist $row] {
-	if {![info exists idrowranges($id)]} continue
+	if {$id eq {}} continue
 	set i -1
-	foreach {s e} $idrowranges($id) {
+	foreach {s e} [rowranges $id] {
 	    incr i
 	    if {$row < $s} continue
 	    if {$e eq {}} break
@@ -1465,9 +2415,9 @@ proc drawcmitrow {row} {
 	getcommit $id
     }
     assigncolor $id
-    if {[info exists commitlisted($id)] && [info exists parents($id)]
-	&& $parents($id) ne {}} {
-	set rmx [drawparentlinks $id $row $col $parents($id)]
+    set olds [lindex $parentlist $row]
+    if {$olds ne {}} {
+	set rmx [drawparentlinks $id $row $col $olds]
     } else {
 	set rmx 0
     }
@@ -1509,60 +2459,93 @@ proc clear_display {} {
     catch {unset idrangedrawn}
 }
 
+proc findcrossings {id} {
+    global rowidlist parentlist numcommits rowoffsets displayorder
+
+    set cross {}
+    set ccross {}
+    foreach {s e} [rowranges $id] {
+	if {$e >= $numcommits} {
+	    set e [expr {$numcommits - 1}]
+	}
+	if {$e <= $s} continue
+	set x [lsearch -exact [lindex $rowidlist $e] $id]
+	if {$x < 0} {
+	    puts "findcrossings: oops, no [shortids $id] in row $e"
+	    continue
+	}
+	for {set row $e} {[incr row -1] >= $s} {} {
+	    set olds [lindex $parentlist $row]
+	    set kid [lindex $displayorder $row]
+	    set kidx [lsearch -exact [lindex $rowidlist $row] $kid]
+	    if {$kidx < 0} continue
+	    set nextrow [lindex $rowidlist [expr {$row + 1}]]
+	    foreach p $olds {
+		set px [lsearch -exact $nextrow $p]
+		if {$px < 0} continue
+		if {($kidx < $x && $x < $px) || ($px < $x && $x < $kidx)} {
+		    if {[lsearch -exact $ccross $p] >= 0} continue
+		    if {$x == $px + ($kidx < $px? -1: 1)} {
+			lappend ccross $p
+		    } elseif {[lsearch -exact $cross $p] < 0} {
+			lappend cross $p
+		    }
+		}
+	    }
+	    set inc [lindex $rowoffsets $row $x]
+	    if {$inc eq {}} break
+	    incr x $inc
+	}
+    }
+    return [concat $ccross {{}} $cross]
+}
+
 proc assigncolor {id} {
     global colormap colors nextcolor
-    global parents nparents children nchildren
-    global cornercrossings crossings
+    global commitrow parentlist children children curview
 
     if {[info exists colormap($id)]} return
     set ncolors [llength $colors]
-    if {$nchildren($id) == 1} {
-	set child [lindex $children($id) 0]
+    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)]
-	    && $nparents($child) == 1} {
+	    && [llength [lindex $parentlist $commitrow($curview,$child)]] == 1} {
 	    set colormap($id) $colormap($child)
 	    return
 	}
     }
     set badcolors {}
-    if {[info exists cornercrossings($id)]} {
-	foreach x $cornercrossings($id) {
-	    if {[info exists colormap($x)]
-		&& [lsearch -exact $badcolors $colormap($x)] < 0} {
-		lappend badcolors $colormap($x)
-	    }
+    set origbad {}
+    foreach x [findcrossings $id] {
+	if {$x eq {}} {
+	    # delimiter between corner crossings and other crossings
+	    if {[llength $badcolors] >= $ncolors - 1} break
+	    set origbad $badcolors
 	}
-	if {[llength $badcolors] >= $ncolors} {
-	    set badcolors {}
+	if {[info exists colormap($x)]
+	    && [lsearch -exact $badcolors $colormap($x)] < 0} {
+	    lappend badcolors $colormap($x)
 	}
     }
-    set origbad $badcolors
-    if {[llength $badcolors] < $ncolors - 1} {
-	if {[info exists crossings($id)]} {
-	    foreach x $crossings($id) {
-		if {[info exists colormap($x)]
-		    && [lsearch -exact $badcolors $colormap($x)] < 0} {
-		    lappend badcolors $colormap($x)
-		}
-	    }
-	    if {[llength $badcolors] >= $ncolors} {
-		set badcolors $origbad
-	    }
-	}
-	set origbad $badcolors
+    if {[llength $badcolors] >= $ncolors} {
+	set badcolors $origbad
     }
+    set origbad $badcolors
     if {[llength $badcolors] < $ncolors - 1} {
-	foreach child $children($id) {
+	foreach child $kids {
 	    if {[info exists colormap($child)]
 		&& [lsearch -exact $badcolors $colormap($child)] < 0} {
 		lappend badcolors $colormap($child)
 	    }
-	    if {[info exists parents($child)]} {
-		foreach p $parents($child) {
-		    if {[info exists colormap($p)]
-			&& [lsearch -exact $badcolors $colormap($p)] < 0} {
-			lappend badcolors $colormap($p)
-		    }
+	    foreach p [lindex $parentlist $commitrow($curview,$child)] {
+		if {[info exists colormap($p)]
+		    && [lsearch -exact $badcolors $colormap($p)] < 0} {
+		    lappend badcolors $colormap($p)
 		}
 	    }
 	}
@@ -1592,7 +2575,7 @@ 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
@@ -1635,7 +2618,7 @@ 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 + $linespc}]
 	} else {
 	    # draw a head or other ref
 	    if {[incr nheads -1] >= 0} {
@@ -1646,6 +2629,14 @@ proc drawtags {id x xt y1} {
 	    set xl [expr {$xl - $delta/2}]
 	    $canv create polygon $x $yt $xr $yt $xr $yb $x $yb \
 		-width 1 -outline black -fill $col -tags tag.$id
+	    if {[regexp {^(remotes/.*/|remotes/)} $tag match remoteprefix]} {
+	        set rwid [font measure $mainfont $remoteprefix]
+		set xi [expr {$x + 1}]
+		set yti [expr {$yt + 1}]
+		set xri [expr {$x + $rwid}]
+		$canv create polygon $xi $yti $xri $yti $xri $yb $xi $yb \
+			-width 0 -fill "#ffddaa" -tags tag.$id
+	    }
 	}
 	set t [$canv create text $xl $y1 -anchor w -text $tag \
 		   -font $mainfont -tags tag.$id]
@@ -1656,55 +2647,6 @@ proc drawtags {id x xt y1} {
     return $xt
 }
 
-proc checkcrossings {row endrow} {
-    global displayorder parents rowidlist
-
-    for {} {$row < $endrow} {incr row} {
-	set id [lindex $displayorder $row]
-	set i [lsearch -exact [lindex $rowidlist $row] $id]
-	if {$i < 0} continue
-	set idlist [lindex $rowidlist [expr {$row+1}]]
-	foreach p $parents($id) {
-	    set j [lsearch -exact $idlist $p]
-	    if {$j > 0} {
-		if {$j < $i - 1} {
-		    notecrossings $row $p $j $i [expr {$j+1}]
-		} elseif {$j > $i + 1} {
-		    notecrossings $row $p $i $j [expr {$j-1}]
-		}
-	    }
-	}
-    }
-}
-
-proc notecrossings {row id lo hi corner} {
-    global rowidlist crossings cornercrossings
-
-    for {set i $lo} {[incr i] < $hi} {} {
-	set p [lindex [lindex $rowidlist $row] $i]
-	if {$p == {}} continue
-	if {$i == $corner} {
-	    if {![info exists cornercrossings($id)]
-		|| [lsearch -exact $cornercrossings($id) $p] < 0} {
-		lappend cornercrossings($id) $p
-	    }
-	    if {![info exists cornercrossings($p)]
-		|| [lsearch -exact $cornercrossings($p) $id] < 0} {
-		lappend cornercrossings($p) $id
-	    }
-	} else {
-	    if {![info exists crossings($id)]
-		|| [lsearch -exact $crossings($id) $p] < 0} {
-		lappend crossings($id) $p
-	    }
-	    if {![info exists crossings($p)]
-		|| [lsearch -exact $crossings($p) $id] < 0} {
-		lappend crossings($p) $id
-	    }
-	}
-    }
-}
-
 proc xcoord {i level ln} {
     global canvx0 xspc1 xspc2
 
@@ -1717,23 +2659,25 @@ proc xcoord {i level ln} {
     return $x
 }
 
+proc show_status {msg} {
+    global canv mainfont
+
+    clear_display
+    $canv create text 3 3 -anchor nw -text $msg -font $mainfont -tags textitems
+}
+
 proc finishcommits {} {
-    global commitidx phase
+    global commitidx phase curview
     global canv mainfont ctext maincursor textcursor
-    global findinprogress
+    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
+	show_status "No commits selected"
     }
     set phase {}
+    catch {unset pending_select}
 }
 
 # Don't change the text pane cursor if it is currently the hand cursor,
@@ -1747,17 +2691,41 @@ 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
+    }
 
     set drawmsecs [expr {[clock clicks -milliseconds] - $startmsecs}]
     #puts "overall $drawmsecs ms for $numcommits commits"
@@ -1786,7 +2754,7 @@ 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
 
@@ -1847,7 +2815,7 @@ 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
@@ -1945,13 +2913,8 @@ proc stopfindproc {{done 0}} {
 	catch {close $findprocfile}
 	unset findprocpid
     }
-    if {[info exists findinprogress]} {
-	unset findinprogress
-	if {$phase != "incrdraw"} {
-	    . config -cursor $maincursor
-	    settextcursor $textcursor
-	}
-    }
+    catch {unset findinprogress}
+    notbusy find
 }
 
 proc findpatches {} {
@@ -1978,7 +2941,7 @@ proc findpatches {} {
     }
 
     if {[catch {
-	set f [open [list | git-diff-tree --stdin -s -r -S$findstring \
+	set f [open [list | git diff-tree --stdin -s -r -S$findstring \
 			 << $inputids] r]
     } err]} {
 	error_popup "Error starting search process: $err"
@@ -1991,14 +2954,13 @@ 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} {
@@ -2011,15 +2973,15 @@ proc readfindproc {} {
 	return
     }
     if {![regexp {^[0-9a-f]{40}} $line id]} {
-	error_popup "Can't parse git-diff-tree output: $line"
+	error_popup "Can't parse git diff-tree output: $line"
 	stopfindproc
 	return
     }
-    if {![info exists commitrow($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
 }
 
@@ -2046,7 +3008,7 @@ proc insertmatch {l id} {
 
 proc findfiles {} {
     global selectedline numcommits displayorder ctext
-    global ffileline finddidsel parents nparents
+    global ffileline finddidsel parentlist
     global findinprogress findstartline findinsertpos
     global treediffs fdiffid fdiffsneeded fdiffpos
     global findmergefiles
@@ -2064,7 +3026,7 @@ proc findfiles {} {
     set fdiffsneeded {}
     while 1 {
 	set id [lindex $displayorder $l]
-	if {$findmergefiles || $nparents($id) == 1} {
+	if {$findmergefiles || [llength [lindex $parentlist $l]] == 1} {
 	    if {![info exists treediffs($id)]} {
 		append diffsneeded "$id\n"
 		lappend fdiffsneeded $id
@@ -2076,10 +3038,10 @@ proc findfiles {} {
 	if {$l == $findstartline} break
     }
 
-    # start off a git-diff-tree process if needed
+    # start off a git diff-tree process if needed
     if {$diffsneeded ne {}} {
 	if {[catch {
-	    set df [open [list | git-diff-tree -r --stdin << $diffsneeded] r]
+	    set df [open [list | git diff-tree -r --stdin << $diffsneeded] r]
 	} err ]} {
 	    error_popup "Error starting search process: $err"
 	    return
@@ -2093,10 +3055,9 @@ proc findfiles {} {
     set finddidsel 0
     set findinsertpos end
     set id [lindex $displayorder $l]
-    . config -cursor watch
-    settextcursor watch
+    nowbusy find
     set findinprogress 1
-    findcont $id
+    findcont
     update
 }
 
@@ -2110,7 +3071,7 @@ proc readfilediffs {df} {
 	    if {[catch {close $df} err]} {
 		stopfindproc
 		bell
-		error_popup "Error in git-diff-tree: $err"
+		error_popup "Error in git diff-tree: $err"
 	    } elseif {[info exists findid]} {
 		set id $findid
 		stopfindproc
@@ -2137,13 +3098,13 @@ proc donefilediff {} {
     if {[info exists fdiffid]} {
 	while {[lindex $fdiffsneeded $fdiffpos] ne $fdiffid
 	       && $fdiffpos < [llength $fdiffsneeded]} {
-	    # git-diff-tree doesn't output anything for a commit
+	    # git diff-tree doesn't output anything for a commit
 	    # which doesn't change anything
 	    set nullid [lindex $fdiffsneeded $fdiffpos]
 	    set treediffs($nullid) {}
 	    if {[info exists findid] && $nullid eq $findid} {
 		unset findid
-		findcont $nullid
+		findcont
 	    }
 	    incr fdiffpos
 	}
@@ -2154,20 +3115,21 @@ proc donefilediff {} {
 	}
 	if {[info exists findid] && $fdiffid eq $findid} {
 	    unset findid
-	    findcont $fdiffid
+	    findcont
 	}
     }
 }
 
-proc findcont {id} {
-    global findid treediffs parents nparents
+proc findcont {} {
+    global findid treediffs parentlist
     global ffileline findstartline finddidsel
     global displayorder numcommits matchinglines findinprogress
     global findmergefiles
 
     set l $ffileline
-    while 1 {
-	if {$findmergefiles || $nparents($id) == 1} {
+    while {1} {
+	set id [lindex $displayorder $l]
+	if {$findmergefiles || [llength [lindex $parentlist $l]] == 1} {
 	    if {![info exists treediffs($id)]} {
 		set findid $id
 		set ffileline $l
@@ -2189,7 +3151,6 @@ proc findcont {id} {
 	    set l 0
 	}
 	if {$l == $findstartline} break
-	set id [lindex $displayorder $l]
     }
     stopfindproc
     if {!$finddidsel} {
@@ -2254,8 +3215,11 @@ proc selcanvline {w x y} {
 
 proc commit_descriptor {p} {
     global commitinfo
+    if {![info exists commitinfo($p)]} {
+	getcommit $p
+    }
     set l "..."
-    if {[info exists commitinfo($p)]} {
+    if {[llength $commitinfo($p)] > 1} {
 	set l [lindex $commitinfo($p) 0]
     }
     return "$p ($l)"
@@ -2263,22 +3227,23 @@ 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
+proc appendwithlinks {text tags} {
+    global ctext commitrow linknum curview
 
     set start [$ctext index "end - 1c"]
-    $ctext insert end $text
+    $ctext insert end $text $tags
     $ctext insert end "\n"
     set links [regexp -indices -all -inline {[0-9a-f]{40}} $text]
     foreach l $links {
 	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
@@ -2286,14 +3251,32 @@ proc appendwithlinks {text} {
     $ctext tag bind link <Leave> { %W configure -cursor $curtextcursor }
 }
 
+proc viewnextline {dir} {
+    global canv linespc
+
+    $canv delete hover
+    set ymax [lindex [$canv cget -scrollregion] 3]
+    set wnow [$canv yview]
+    set wtop [expr {[lindex $wnow 0] * $ymax}]
+    set newtop [expr {$wtop + $dir * $linespc}]
+    if {$newtop < 0} {
+	set newtop 0
+    } elseif {$newtop > $ymax} {
+	set newtop $ymax
+    }
+    allcanvs yview moveto [expr {$newtop * 1.0 / $ymax}]
+}
+
 proc selectline {l isnew} {
     global canv canv2 canv3 ctext commitinfo selectedline
     global displayorder linehtag linentag linedtag
-    global canvy0 linespc parents nparents children
-    global cflist currentid sha1entry
+    global canvy0 linespc parentlist childlist
+    global currentid sha1entry
     global commentend idtags linknum
-    global mergemax numcommits
+    global mergemax numcommits pending_select
+    global cmitmode
 
+    catch {unset pending_select}
     $canv delete hover
     normalline
     if {$l < 0 || $l >= $numcommits} return
@@ -2363,8 +3346,6 @@ proc selectline {l isnew} {
     $ctext conf -state normal
     $ctext delete 0.0 end
     set linknum 0
-    $ctext mark set fmark.0 0.0
-    $ctext mark gravity fmark.0 left
     set info $commitinfo($id)
     set date [formatdate [lindex $info 2]]
     $ctext insert end "Author: [lindex $info 1]  $date\n"
@@ -2378,52 +3359,61 @@ proc selectline {l isnew} {
 	$ctext insert end "\n"
     }
  
-    set comment {}
-    if {$nparents($id) > 1} {
+    set headers {}
+    set olds [lindex $parentlist $l]
+    if {[llength $olds] > 1} {
 	set np 0
-	foreach p $parents($id) {
+	foreach p $olds {
 	    if {$np >= $mergemax} {
 		set tag mmax
 	    } else {
 		set tag m$np
 	    }
 	    $ctext insert end "Parent: " $tag
-	    appendwithlinks [commit_descriptor $p]
+	    appendwithlinks [commit_descriptor $p] {}
 	    incr np
 	}
     } else {
-	if {[info exists parents($id)]} {
-	    foreach p $parents($id) {
-		append comment "Parent: [commit_descriptor $p]\n"
-	    }
+	foreach p $olds {
+	    append headers "Parent: [commit_descriptor $p]\n"
 	}
     }
 
-    if {[info exists children($id)]} {
-	foreach c $children($id) {
-	    append comment "Child:  [commit_descriptor $c]\n"
-	}
+    foreach c [lindex $childlist $l] {
+	append headers "Child:  [commit_descriptor $c]\n"
     }
-    append comment "\n"
-    append comment [lindex $info 5]
 
     # make anything that looks like a SHA1 ID be a clickable link
-    appendwithlinks $comment
+    appendwithlinks $headers {}
+    appendwithlinks [lindex $info 5] {comment}
 
     $ctext tag delete Comments
     $ctext tag remove found 1.0 end
     $ctext conf -state disabled
     set commentend [$ctext index "end - 1c"]
 
-    $cflist delete 0 end
-    $cflist insert end "Comments"
-    if {$nparents($id) <= 1} {
+    init_flist "Comments"
+    if {$cmitmode eq "tree"} {
+	gettree $id
+    } elseif {[llength $olds] <= 1} {
 	startdiff $id
     } else {
-	mergediff $id
+	mergediff $id $l
     }
 }
 
+proc selfirstline {} {
+    unmarkmatches
+    selectline 0 1
+}
+
+proc sellastline {} {
+    global numcommits
+    unmarkmatches
+    set l [expr {$numcommits - 1}]
+    selectline $l 1
+}
+
 proc selnextline {dir} {
     global selectedline
     if {![info exists selectedline]} return
@@ -2432,25 +3422,55 @@ proc selnextline {dir} {
     selectline $l 1
 }
 
+proc selnextpage {dir} {
+    global canv linespc selectedline numcommits
+
+    set lpp [expr {([winfo height $canv] - 2) / $linespc}]
+    if {$lpp < 1} {
+	set lpp 1
+    }
+    allcanvs yview scroll [expr {$dir * $lpp}] units
+    drawvisible
+    if {![info exists selectedline]} return
+    set l [expr {$selectedline + $dir * $lpp}]
+    if {$l < 0} {
+	set l 0
+    } elseif {$l >= $numcommits} {
+        set l [expr $numcommits - 1]
+    }
+    unmarkmatches
+    selectline $l 1    
+}
+
 proc unselectline {} {
-    global selectedline
+    global selectedline currentid
 
     catch {unset selectedline}
+    catch {unset currentid}
     allcanvs delete secsel
 }
 
+proc reselectline {} {
+    global selectedline
+
+    if {[info exists selectedline]} {
+	selectline $selectedline 0
+    }
+}
+
 proc addtohistory {cmd} {
-    global history historyindex
+    global history historyindex curview
 
+    set elt [list $curview $cmd]
     if {$historyindex > 0
-	&& [lindex $history [expr {$historyindex - 1}]] == $cmd} {
+	&& [lindex $history [expr {$historyindex - 1}]] == $elt} {
 	return
     }
 
     if {$historyindex < [llength $history]} {
-	set history [lreplace $history $historyindex end $cmd]
+	set history [lreplace $history $historyindex end $elt]
     } else {
-	lappend history $cmd
+	lappend history $elt
     }
     incr historyindex
     if {$historyindex > 1} {
@@ -2461,13 +3481,23 @@ proc addtohistory {cmd} {
     .ctop.top.bar.rightbut conf -state disabled
 }
 
+proc godo {elt} {
+    global curview
+
+    set view [lindex $elt 0]
+    set cmd [lindex $elt 1]
+    if {$curview != $view} {
+	showview $view
+    }
+    eval $cmd
+}
+
 proc goback {} {
     global history historyindex
 
     if {$historyindex > 1} {
 	incr historyindex -1
-	set cmd [lindex $history [expr {$historyindex - 1}]]
-	eval $cmd
+	godo [lindex $history [expr {$historyindex - 1}]]
 	.ctop.top.bar.rightbut conf -state normal
     }
     if {$historyindex <= 1} {
@@ -2481,7 +3511,7 @@ proc goforw {} {
     if {$historyindex < [llength $history]} {
 	set cmd [lindex $history $historyindex]
 	incr historyindex
-	eval $cmd
+	godo $cmd
 	.ctop.top.bar.leftbut conf -state normal
     }
     if {$historyindex >= [llength $history]} {
@@ -2489,28 +3519,117 @@ proc goforw {} {
     }
 }
 
-proc mergediff {id} {
-    global parents diffmergeid diffopts mdifffd
-    global difffilestart diffids
+proc gettree {id} {
+    global treefilelist treeidlist diffids diffmergeid treepending
+
+    set diffids $id
+    catch {unset diffmergeid}
+    if {![info exists treefilelist($id)]} {
+	if {![info exists treepending]} {
+	    if {[catch {set gtf [open [concat | git ls-tree -r $id] r]}]} {
+		return
+	    }
+	    set treepending $id
+	    set treefilelist($id) {}
+	    set treeidlist($id) {}
+	    fconfigure $gtf -blocking 0
+	    fileevent $gtf readable [list gettreeline $gtf $id]
+	}
+    } else {
+	setfilelist $id
+    }
+}
+
+proc gettreeline {gtf id} {
+    global treefilelist treeidlist treepending cmitmode diffids
+
+    while {[gets $gtf line] >= 0} {
+	if {[lindex $line 1] ne "blob"} continue
+	set sha1 [lindex $line 2]
+	set fname [lindex $line 3]
+	lappend treefilelist($id) $fname
+	lappend treeidlist($id) $sha1
+    }
+    if {![eof $gtf]} return
+    close $gtf
+    unset treepending
+    if {$cmitmode ne "tree"} {
+	if {![info exists diffmergeid]} {
+	    gettreediffs $diffids
+	}
+    } elseif {$id ne $diffids} {
+	gettree $diffids
+    } else {
+	setfilelist $id
+    }
+}
+
+proc showfile {f} {
+    global treefilelist treeidlist diffids
+    global ctext commentend
+
+    set i [lsearch -exact $treefilelist($diffids) $f]
+    if {$i < 0} {
+	puts "oops, $f not in list for id $diffids"
+	return
+    }
+    set blob [lindex $treeidlist($diffids) $i]
+    if {[catch {set bf [open [concat | git cat-file blob $blob] r]} err]} {
+	puts "oops, error reading blob $blob: $err"
+	return
+    }
+    fconfigure $bf -blocking 0
+    fileevent $bf readable [list getblobline $bf $diffids]
+    $ctext config -state normal
+    $ctext delete $commentend end
+    $ctext insert end "\n"
+    $ctext insert end "$f\n" filesep
+    $ctext config -state disabled
+    $ctext yview $commentend
+}
+
+proc getblobline {bf id} {
+    global diffids cmitmode ctext
+
+    if {$id ne $diffids || $cmitmode ne "tree"} {
+	catch {close $bf}
+	return
+    }
+    $ctext config -state normal
+    while {[gets $bf line] >= 0} {
+	$ctext insert end "$line\n"
+    }
+    if {[eof $bf]} {
+	# delete last newline
+	$ctext delete "end - 2c" "end - 1c"
+	close $bf
+    }
+    $ctext config -state disabled
+}
+
+proc mergediff {id l} {
+    global diffmergeid diffopts mdifffd
+    global diffids
+    global parentlist
 
     set diffmergeid $id
     set diffids $id
-    catch {unset difffilestart}
     # this doesn't seem to actually affect anything...
     set env(GIT_DIFF_OPTS) $diffopts
-    set cmd [concat | git-diff-tree --no-commit-id --cc $id]
+    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 np [llength [lindex $parentlist $l]]
+    fileevent $mdf readable [list getmergediffline $mdf $id $np]
     set nextupdate [expr {[clock clicks -milliseconds] + 100}]
 }
 
-proc getmergediffline {mdf id} {
-    global diffmergeid ctext cflist nextupdate nparents mergemax
+proc getmergediffline {mdf id np} {
+    global diffmergeid ctext cflist nextupdate mergemax
     global difffilestart mdifffd
 
     set n [gets $mdf line]
@@ -2529,11 +3648,8 @@ proc getmergediffline {mdf id} {
 	# start of a new file
 	$ctext insert end "\n"
 	set here [$ctext index "end - 1c"]
-	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
+	lappend difffilestart $here
+	add_flist [list $fname]
 	set l [expr {(78 - [string length $fname]) / 2}]
 	set pad [string range "----------------------------------------" 1 $l]
 	$ctext insert end "$pad $fname $pad\n" filesep
@@ -2543,7 +3659,6 @@ proc getmergediffline {mdf id} {
 	# do nothing
     } else {
 	# parse the prefix - one ' ', '-' or '+' for each parent
-	set np $nparents($id)
 	set spaces {}
 	set minuses {}
 	set pluses {}
@@ -2584,7 +3699,7 @@ proc getmergediffline {mdf id} {
 	incr nextupdate 100
 	fileevent $mdf readable {}
 	update
-	fileevent $mdf readable [list getmergediffline $mdf $id]
+	fileevent $mdf readable [list getmergediffline $mdf $id $np]
     }
 }
 
@@ -2604,18 +3719,16 @@ proc startdiff {ids} {
 
 proc addtocflist {ids} {
     global treediffs cflist
-    foreach f $treediffs($ids) {
-	$cflist insert end $f
-    }
+    add_flist $treediffs($ids)
     getblobdiffs $ids
 }
 
 proc gettreediffs {ids} {
-    global treediff parents treepending
+    global treediff treepending
     set treepending $ids
     set treediff {}
     if {[catch \
-	 {set gdtf [open [concat | git-diff-tree --no-commit-id -r $ids] r]} \
+	 {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]
@@ -2623,6 +3736,7 @@ proc gettreediffs {ids} {
 
 proc gettreediffline {gdtf ids} {
     global treediff treediffs treepending diffids diffmergeid
+    global cmitmode
 
     set n [gets $gdtf line]
     if {$n < 0} {
@@ -2630,7 +3744,9 @@ proc gettreediffline {gdtf ids} {
 	close $gdtf
 	set treediffs($ids) $treediff
 	unset treepending
-	if {$ids != $diffids} {
+	if {$cmitmode eq "tree"} {
+	    gettree $diffids
+	} elseif {$ids != $diffids} {
 	    if {![info exists diffmergeid]} {
 		gettreediffs $diffids
 	    }
@@ -2645,10 +3761,10 @@ proc gettreediffline {gdtf ids} {
 
 proc getblobdiffs {ids} {
     global diffopts blobdifffd diffids env curdifftag curtagstart
-    global difffilestart nextupdate diffinhdr treediffs
+    global nextupdate diffinhdr treediffs
 
     set env(GIT_DIFF_OPTS) $diffopts
-    set cmd [concat | git-diff-tree --no-commit-id -r -p -C $ids]
+    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: $err"
 	return
@@ -2658,11 +3774,23 @@ proc getblobdiffs {ids} {
     set blobdifffd($ids) $bdf
     set curdifftag Comments
     set curtagstart 0.0
-    catch {unset difffilestart}
     fileevent $bdf readable [list getblobdiffline $bdf $diffids]
     set nextupdate [expr {[clock clicks -milliseconds] + 100}]
 }
 
+proc setinlist {var i val} {
+    global $var
+
+    while {[llength [set $var]] < $i} {
+	lappend $var {}
+    }
+    if {[llength [set $var]] == $i} {
+	lappend $var $val
+    } else {
+	lset $var $i $val
+    }
+}
+
 proc getblobdiffline {bdf ids} {
     global diffids blobdifffd ctext curdifftag curtagstart
     global diffnexthead diffnextnote difffilestart
@@ -2686,23 +3814,17 @@ proc getblobdiffline {bdf ids} {
 	# start of a new file
 	$ctext insert end "\n"
 	$ctext tag add $curdifftag $curtagstart end
-	set curtagstart [$ctext index "end - 1c"]
-	set header $newname
 	set here [$ctext index "end - 1c"]
-	set i [lsearch -exact $treediffs($diffids) $fname]
+	set curtagstart $here
+	set header $newname
+	set i [lsearch -exact $treediffs($ids) $fname]
 	if {$i >= 0} {
-	    set difffilestart($i) $here
-	    incr i
-	    $ctext mark set fmark.$i $here
-	    $ctext mark gravity fmark.$i left
+	    setinlist difffilestart $i $here
 	}
-	if {$newname != $fname} {
-	    set i [lsearch -exact $treediffs($diffids) $newname]
+	if {$newname ne $fname} {
+	    set i [lsearch -exact $treediffs($ids) $newname]
 	    if {$i >= 0} {
-		set difffilestart($i) $here
-		incr i
-		$ctext mark set fmark.$i $here
-		$ctext mark gravity fmark.$i left
+		setinlist difffilestart $i $here
 	    }
 	}
 	set curdifftag "f:$fname"
@@ -2752,26 +3874,11 @@ proc getblobdiffline {bdf ids} {
 proc nextfile {} {
     global difffilestart ctext
     set here [$ctext index @0,0]
-    for {set i 0} {[info exists difffilestart($i)]} {incr i} {
-	if {[$ctext compare $difffilestart($i) > $here]} {
-	    if {![info exists pos]
-		|| [$ctext compare $difffilestart($i) < $pos]} {
-		set pos $difffilestart($i)
-	    }
+    foreach loc $difffilestart {
+	if {[$ctext compare $loc > $here]} {
+	    $ctext yview $loc
 	}
     }
-    if {[info exists pos]} {
-	$ctext yview $pos
-    }
-}
-
-proc listboxsel {} {
-    global ctext cflist currentid
-    if {![info exists currentid]} return
-    set sel [lsort [$cflist curselection]]
-    if {$sel eq {}} return
-    set first [lindex $sel 0]
-    catch {$ctext yview fmark.$first}
 }
 
 proc setcoords {} {
@@ -2804,11 +3911,10 @@ 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
@@ -2816,7 +3922,7 @@ proc incrfont {inc} {
     foreach e $entries {
 	$e conf -font $mainfont
     }
-    if {$phase == "getcommits"} {
+    if {$phase eq "getcommits"} {
 	$canv itemconf textitems -font $mainfont
     }
     redisplay
@@ -2846,13 +3952,15 @@ proc sha1change {n1 n2 op} {
 }
 
 proc gotocommit {} {
-    global sha1string currentid commitrow tagids
-    global displayorder numcommits
+    global sha1string currentid commitrow tagids headids
+    global displayorder numcommits curview
 
     if {$sha1string == {}
 	|| ([info exists currentid] && $sha1string == $currentid)} return
     if {[info exists tagids($sha1string)]} {
 	set id $tagids($sha1string)
+    } elseif {[info exists headids($sha1string)]} {
+	set id $headids($sha1string)
     } else {
 	set id [string tolower $sha1string]
 	if {[regexp {^[0-9a-f]{4,39}$} $id]} {
@@ -2871,14 +3979,14 @@ proc gotocommit {} {
 	    }
 	}
     }
-    if {[info exists commitrow($id)]} {
-	selectline $commitrow($id) 1
+    if {[info exists commitrow($curview,$id)]} {
+	selectline $commitrow($curview,$id) 1
 	return
     }
     if {[regexp {^[0-9a-fA-F]{4,}$} $sha1string]} {
 	set type "SHA1 id"
     } else {
-	set type "Tag"
+	set type "Tag/Head"
     }
     error_popup "$type $sha1string is not known"
 }
@@ -2947,12 +4055,13 @@ proc linehover {} {
 }
 
 proc clickisonarrow {id y} {
-    global lthickness idrowranges
+    global lthickness
 
+    set ranges [rowranges $id]
     set thresh [expr {2 * $lthickness + 6}]
-    set n [expr {[llength $idrowranges($id)] - 1}]
+    set n [expr {[llength $ranges] - 1}]
     for {set i 1} {$i < $n} {incr i} {
-	set row [lindex $idrowranges($id) $i]
+	set row [lindex $ranges $i]
 	if {abs([yc $row] - $y) < $thresh} {
 	    return $i
 	}
@@ -2961,11 +4070,11 @@ proc clickisonarrow {id y} {
 }
 
 proc arrowjump {id n y} {
-    global idrowranges canv
+    global canv
 
     # 1 <-> 2, 3 <-> 4, etc...
     set n [expr {(($n - 1) ^ 1) + 1}]
-    set row [lindex $idrowranges($id) $n]
+    set row [lindex [rowranges $id] $n]
     set yt [yc $row]
     set ymax [lindex [$canv cget -scrollregion] 3]
     if {$ymax eq {} || $ymax <= 0} return
@@ -2979,7 +4088,7 @@ proc arrowjump {id n y} {
 }
 
 proc lineclick {x y id isnew} {
-    global ctext commitinfo children cflist canv thickerline
+    global ctext commitinfo children canv thickerline curview
 
     if {![info exists commitinfo($id)] && ![getcommit $id]} return
     unmarkmatches
@@ -3018,10 +4127,11 @@ 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"
-    if {[info exists children($id)]} {
+    set kids $children($curview,$id)
+    if {$kids ne {}} {
 	$ctext insert end "\nChildren:"
 	set i 0
-	foreach child $children($id) {
+	foreach child $kids {
 	    incr i
 	    if {![info exists commitinfo($child)] && ![getcommit $child]} continue
 	    set info $commitinfo($child)
@@ -3035,8 +4145,7 @@ proc lineclick {x y id isnew} {
 	}
     }
     $ctext conf -state disabled
-
-    $cflist delete 0 end
+    init_flist {}
 }
 
 proc normalline {} {
@@ -3049,9 +4158,9 @@ 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
     }
 }
 
@@ -3064,9 +4173,10 @@ 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
@@ -3094,15 +4204,12 @@ proc diffvssel {dirn} {
 }
 
 proc doseldiff {oldid newid} {
-    global ctext cflist
+    global ctext
     global commitinfo
 
     $ctext conf -state normal
     $ctext delete 0.0 end
-    $ctext mark set fmark.0 0.0
-    $ctext mark gravity fmark.0 left
-    $cflist delete 0 end
-    $cflist insert end "Top"
+    init_flist "Top"
     $ctext insert end "From "
     $ctext tag conf link -foreground blue -underline 1
     $ctext tag bind link <Enter> { %W configure -cursor hand2 }
@@ -3194,7 +4301,7 @@ proc mkpatchgo {} {
     set oldid [$patchtop.fromsha1 get]
     set newid [$patchtop.tosha1 get]
     set fname [$patchtop.fname get]
-    if {[catch {exec git-diff-tree -p $oldid $newid >$fname &} err]} {
+    if {[catch {exec git diff-tree -p $oldid $newid >$fname &} err]} {
 	error_popup "Error creating patch: $err"
     }
     catch {destroy $patchtop}
@@ -3269,14 +4376,15 @@ 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
     }
 }
@@ -3368,7 +4476,6 @@ proc listrefs {id} {
 
 proc rereadrefs {} {
     global idtags idheads idotherrefs
-    global tagids headids otherrefids
 
     set refids [concat [array names idtags] \
 		    [array names idheads] [array names idotherrefs]]
@@ -3389,7 +4496,7 @@ proc rereadrefs {} {
 }
 
 proc showtag {tag isnew} {
-    global ctext cflist tagcontents tagids linknum
+    global ctext tagcontents tagids linknum
 
     if {$isnew} {
 	addtohistory [list showtag $tag 0]
@@ -3402,9 +4509,9 @@ proc showtag {tag isnew} {
     } else {
 	set text "Tag: $tag\nId:  $tagids($tag)"
     }
-    appendwithlinks $text
+    appendwithlinks $text {}
     $ctext conf -state disabled
-    $cflist delete 0 end
+    init_flist {}
 }
 
 proc doquit {} {
@@ -3761,11 +4868,11 @@ proc tcl_encoding {enc} {
 # defaults...
 set datemode 0
 set diffopts "-U 5 -p"
-set wrcomcmd "git-diff-tree --stdin -p --pretty"
+set wrcomcmd "git diff-tree --stdin -p --pretty"
 
 set gitencoding {}
 catch {
-    set gitencoding [exec git-repo-config --get i18n.commitencoding]
+    set gitencoding [exec git repo-config --get i18n.commitencoding]
 }
 if {$gitencoding == ""} {
     set gitencoding "utf-8"
@@ -3777,6 +4884,7 @@ if {$tclencoding == {}} {
 
 set mainfont {Helvetica 9}
 set textfont {Courier 9}
+set uifont {Helvetica 9 bold}
 set findmergefiles 0
 set maxgraphpct 50
 set maxwidth 16
@@ -3785,13 +4893,14 @@ set fastdate 0
 set uparrowlen 7
 set downarrowlen 7
 set mingaplen 30
+set flistmode "flat"
+set cmitmode "patch"
+set wrapcomment "none"
 
 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 {}
@@ -3808,19 +4917,77 @@ foreach arg $argv {
 # check that we can find a .git directory somewhere...
 set gitdir [gitdir]
 if {![file isdirectory $gitdir]} {
-    error_popup "Cannot find the git directory \"$gitdir\"."
+    show_error {} . "Cannot find the git directory \"$gitdir\"."
     exit 1
 }
 
+set cmdline_files {}
+set i [lsearch -exact $revtreeargs "--"]
+if {$i >= 0} {
+    set cmdline_files [lrange $revtreeargs [expr {$i + 1}] end]
+    set revtreeargs [lrange $revtreeargs 0 [expr {$i - 1}]]
+} elseif {$revtreeargs ne {}} {
+    if {[catch {
+	set f [eval exec git rev-parse --no-revs --no-flags $revtreeargs]
+	set cmdline_files [split $f "\n"]
+	set n [llength $cmdline_files]
+	set revtreeargs [lrange $revtreeargs 0 end-$n]
+    } err]} {
+	# unfortunately we get both stdout and stderr in $err,
+	# so look for "fatal:".
+	set i [string first "fatal:" $err]
+	if {$i > 0} {
+	    set err [string range $err [expr {$i + 6}] end]
+	}
+	show_error {} . "Bad arguments to gitk:\n$err"
+	exit 1
+    }
+}
+
 set history {}
 set historyindex 0
 
 set optim_delay 16
 
+set nextviewnum 1
+set curview 0
+set selectedview 0
+set selectedhlview {}
+set viewfiles(0) {}
+set viewperm(0) 0
+set viewargs(0) {}
+
+set cmdlineok 0
 set stopped 0
 set stuffsaved 0
 set patchnum 0
 setcoords
-makewindow $revtreeargs
+makewindow
 readrefs
-getcommits $revtreeargs
+
+if {$cmdline_files ne {} || $revtreeargs ne {}} {
+    # create a view for the files/dirs specified on the command line
+    set curview 1
+    set selectedview 1
+    set nextviewnum 2
+    set viewname(1) "Command line"
+    set viewfiles(1) $cmdline_files
+    set viewargs(1) $revtreeargs
+    set viewperm(1) 0
+    addviewmenu 1
+    .bar.view entryconf 2 -state normal
+    .bar.view entryconf 3 -state normal
+}
+
+if {[info exists permviews]} {
+    foreach v $permviews {
+	set n $nextviewnum
+	incr nextviewnum
+	set viewname($n) [lindex $v 0]
+	set viewfiles($n) [lindex $v 1]
+	set viewargs($n) [lindex $v 2]
+	set viewperm($n) 1
+	addviewmenu $n
+    }
+}
+getcommits