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gitk
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#!/bin/sh
# Tcl ignores the next line -*- tcl -*- \
exec wish "$0" -- "${1+$@}"
# Copyright (C) 2005 Paul Mackerras. All rights reserved.
# This program is free software; it may be used, copied, modified
# and distributed under the terms of the GNU General Public Licence,
# either version 2, or (at your option) any later version.
proc getcommits {rargs} {
global commits commfd phase canv mainfont env
global startmsecs nextupdate
global ctext maincursor textcursor leftover
# check that we can find a .git directory somewhere...
if {[info exists env(GIT_DIR)]} {
set gitdir $env(GIT_DIR)
} else {
set gitdir ".git"
}
if {![file isdirectory $gitdir]} {
error_popup "Cannot find the git directory \"$gitdir\"."
exit 1
}
set commits {}
set phase getcommits
set startmsecs [clock clicks -milliseconds]
set nextupdate [expr $startmsecs + 100]
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
}
if [catch {
set commfd [open "|git-rev-list --header --topo-order $parsed_args" r]
} err] {
puts stderr "Error executing git-rev-list: $err"
exit 1
}
set leftover {}
fconfigure $commfd -blocking 0 -translation binary
fileevent $commfd readable "getcommitlines $commfd"
$canv delete all
$canv create text 3 3 -anchor nw -text "Reading commits..." \
-font $mainfont -tags textitems
. config -cursor watch
$ctext config -cursor watch
}
proc getcommitlines {commfd} {
global commits parents cdate children nchildren
global commitlisted phase commitinfo nextupdate
global stopped redisplaying leftover
set stuff [read $commfd]
if {$stuff == {}} {
if {![eof $commfd]} return
# this works around what is apparently a bug in Tcl...
fconfigure $commfd -blocking 1
if {![catch {close $commfd} err]} {
after idle finishcommits
return
}
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"
}
error_popup $err
exit 1
}
set start 0
while 1 {
set i [string first "\0" $stuff $start]
if {$i < 0} {
append leftover [string range $stuff $start end]
return
}
set cmit [string range $stuff $start [expr {$i - 1}]]
if {$start == 0} {
set cmit "$leftover$cmit"
set leftover {}
}
set start [expr {$i + 1}]
if {![regexp {^([0-9a-f]{40})\n} $cmit match id]} {
set shortcmit $cmit
if {[string length $shortcmit] > 80} {
set shortcmit "[string range $shortcmit 0 80]..."
}
error_popup "Can't parse git-rev-list output: {$shortcmit}"
exit 1
}
set cmit [string range $cmit 41 end]
lappend commits $id
set commitlisted($id) 1
parsecommit $id $cmit 1
drawcommit $id
if {[clock clicks -milliseconds] >= $nextupdate} {
doupdate
}
while {$redisplaying} {
set redisplaying 0
if {$stopped == 1} {
set stopped 0
set phase "getcommits"
foreach id $commits {
drawcommit $id
if {$stopped} break
if {[clock clicks -milliseconds] >= $nextupdate} {
doupdate
}
}
}
}
}
}
proc doupdate {} {
global commfd nextupdate
incr nextupdate 100
fileevent $commfd readable {}
update
fileevent $commfd readable "getcommitlines $commfd"
}
proc readcommit {id} {
if [catch {set contents [exec git-cat-file commit $id]}] return
parsecommit $id $contents 0
}
proc parsecommit {id contents listed} {
global commitinfo children nchildren parents nparents cdate ncleft
set inhdr 1
set comment {}
set headline {}
set auname {}
set audate {}
set comname {}
set comdate {}
if {![info exists nchildren($id)]} {
set children($id) {}
set nchildren($id) 0
set ncleft($id) 0
}
set parents($id) {}
set nparents($id) 0
foreach line [split $contents "\n"] {
if {$inhdr} {
if {$line == {}} {
set inhdr 0
} else {
set tag [lindex $line 0]
if {$tag == "parent"} {
set p [lindex $line 1]
if {![info exists nchildren($p)]} {
set children($p) {}
set nchildren($p) 0
set ncleft($p) 0
}
lappend parents($id) $p
incr nparents($id)
# sometimes we get a commit that lists a parent twice...
if {$listed && [lsearch -exact $children($p) $id] < 0} {
lappend children($p) $id
incr nchildren($p)
incr ncleft($p)
}
} elseif {$tag == "author"} {
set x [expr {[llength $line] - 2}]
set audate [lindex $line $x]
set auname [lrange $line 1 [expr {$x - 1}]]
} elseif {$tag == "committer"} {
set x [expr {[llength $line] - 2}]
set comdate [lindex $line $x]
set comname [lrange $line 1 [expr {$x - 1}]]
}
}
} else {
if {$comment == {}} {
set headline [string trim $line]
} else {
append comment "\n"
}
if {!$listed} {
# git-rev-list indents the comment by 4 spaces;
# if we got this via git-cat-file, add the indentation
append comment " "
}
append comment $line
}
}
if {$audate != {}} {
set audate [clock format $audate -format "%Y-%m-%d %H:%M:%S"]
}
if {$comdate != {}} {
set cdate($id) $comdate
set comdate [clock format $comdate -format "%Y-%m-%d %H:%M:%S"]
}
set commitinfo($id) [list $headline $auname $audate \
$comname $comdate $comment]
}
proc readrefs {} {
global tagids idtags headids idheads
set tags [glob -nocomplain -types f .git/refs/tags/*]
foreach f $tags {
catch {
set fd [open $f r]
set line [read $fd]
if {[regexp {^[0-9a-f]{40}} $line id]} {
set direct [file tail $f]
set tagids($direct) $id
lappend idtags($id) $direct
set contents [split [exec git-cat-file tag $id] "\n"]
set obj {}
set type {}
set tag {}
foreach l $contents {
if {$l == {}} break
switch -- [lindex $l 0] {
"object" {set obj [lindex $l 1]}
"type" {set type [lindex $l 1]}
"tag" {set tag [string range $l 4 end]}
}
}
if {$obj != {} && $type == "commit" && $tag != {}} {
set tagids($tag) $obj
lappend idtags($obj) $tag
}
}
close $fd
}
}
set heads [glob -nocomplain -types f .git/refs/heads/*]
foreach f $heads {
catch {
set fd [open $f r]
set line [read $fd 40]
if {[regexp {^[0-9a-f]{40}} $line id]} {
set head [file tail $f]
set headids($head) $line
lappend idheads($line) $head
}
close $fd
}
}
}
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"
tkwait window $w
}
proc makewindow {} {
global canv canv2 canv3 linespc charspc ctext cflist textfont
global findtype findloc findstring fstring geometry
global entries sha1entry sha1string sha1but
global maincursor textcursor
global rowctxmenu
menu .bar
.bar add cascade -label "File" -menu .bar.file
menu .bar.file
.bar.file add command -label "Quit" -command doquit
menu .bar.help
.bar add cascade -label "Help" -menu .bar.help
.bar.help add command -label "About gitk" -command about
. configure -menu .bar
if {![info exists geometry(canv1)]} {
set geometry(canv1) [expr 45 * $charspc]
set geometry(canv2) [expr 30 * $charspc]
set geometry(canv3) [expr 15 * $charspc]
set geometry(canvh) [expr 25 * $linespc + 4]
set geometry(ctextw) 80
set geometry(ctexth) 30
set geometry(cflistw) 30
}
panedwindow .ctop -orient vertical
if {[info exists geometry(width)]} {
.ctop conf -width $geometry(width) -height $geometry(height)
set texth [expr {$geometry(height) - $geometry(canvh) - 56}]
set geometry(ctexth) [expr {($texth - 8) /
[font metrics $textfont -linespace]}]
}
frame .ctop.top
frame .ctop.top.bar
pack .ctop.top.bar -side bottom -fill x
set cscroll .ctop.top.csb
scrollbar $cscroll -command {allcanvs yview} -highlightthickness 0
pack $cscroll -side right -fill y
panedwindow .ctop.top.clist -orient horizontal -sashpad 0 -handlesize 4
pack .ctop.top.clist -side top -fill both -expand 1
.ctop add .ctop.top
set canv .ctop.top.clist.canv
canvas $canv -height $geometry(canvh) -width $geometry(canv1) \
-bg white -bd 0 \
-yscrollincr $linespc -yscrollcommand "$cscroll set"
.ctop.top.clist add $canv
set canv2 .ctop.top.clist.canv2
canvas $canv2 -height $geometry(canvh) -width $geometry(canv2) \
-bg white -bd 0 -yscrollincr $linespc
.ctop.top.clist add $canv2
set canv3 .ctop.top.clist.canv3
canvas $canv3 -height $geometry(canvh) -width $geometry(canv3) \
-bg white -bd 0 -yscrollincr $linespc
.ctop.top.clist add $canv3
bind .ctop.top.clist <Configure> {resizeclistpanes %W %w}
set sha1entry .ctop.top.bar.sha1
set entries $sha1entry
set sha1but .ctop.top.bar.sha1label
button $sha1but -text "SHA1 ID: " -state disabled -relief flat \
-command gotocommit -width 8
$sha1but conf -disabledforeground [$sha1but cget -foreground]
pack .ctop.top.bar.sha1label -side left
entry $sha1entry -width 40 -font $textfont -textvariable sha1string
trace add variable sha1string write sha1change
pack $sha1entry -side left -pady 2
button .ctop.top.bar.findbut -text "Find" -command dofind
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
pack $fstring -side left -expand 1 -fill x
set findtype Exact
tk_optionMenu .ctop.top.bar.findtype findtype Exact IgnCase Regexp
set findloc "All fields"
tk_optionMenu .ctop.top.bar.findloc findloc "All fields" Headline \
Comments Author Committer
pack .ctop.top.bar.findloc -side right
pack .ctop.top.bar.findtype -side right
panedwindow .ctop.cdet -orient horizontal
.ctop add .ctop.cdet
frame .ctop.cdet.left
set ctext .ctop.cdet.left.ctext
text $ctext -bg white -state disabled -font $textfont \
-width $geometry(ctextw) -height $geometry(ctexth) \
-yscrollcommand ".ctop.cdet.left.sb set"
scrollbar .ctop.cdet.left.sb -command "$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 filesep -font [concat $textfont bold]
$ctext tag conf hunksep -back blue -fore white
$ctext tag conf d0 -back "#ff8080"
$ctext tag conf d1 -back green
$ctext tag conf found -back yellow
frame .ctop.cdet.right
set cflist .ctop.cdet.right.cfiles
listbox $cflist -bg white -selectmode extended -width $geometry(cflistw) \
-yscrollcommand ".ctop.cdet.right.sb set"
scrollbar .ctop.cdet.right.sb -command "$cflist yview"
pack .ctop.cdet.right.sb -side right -fill y
pack $cflist -side left -fill both -expand 1
.ctop.cdet add .ctop.cdet.right
bind .ctop.cdet <Configure> {resizecdetpanes %W %w}
pack .ctop -side top -fill both -expand 1
bindall <1> {selcanvline %W %x %y}
#bindall <B1-Motion> {selcanvline %W %x %y}
bindall <ButtonRelease-4> "allcanvs yview scroll -5 units"
bindall <ButtonRelease-5> "allcanvs yview scroll 5 units"
bindall <2> "allcanvs scan mark 0 %y"
bindall <B2-Motion> "allcanvs scan dragto 0 %y"
bind . <Key-Up> "selnextline -1"
bind . <Key-Down> "selnextline 1"
bind . <Key-Prior> "allcanvs yview scroll -1 pages"
bind . <Key-Next> "allcanvs yview scroll 1 pages"
bindkey <Key-Delete> "$ctext yview scroll -1 pages"
bindkey <Key-BackSpace> "$ctext yview scroll -1 pages"
bindkey <Key-space> "$ctext yview scroll 1 pages"
bindkey p "selnextline -1"
bindkey n "selnextline 1"
bindkey b "$ctext yview scroll -1 pages"
bindkey d "$ctext yview scroll 18 units"
bindkey u "$ctext yview scroll -18 units"
bindkey / findnext
bindkey ? findprev
bindkey f nextfile
bind . <Control-q> doquit
bind . <Control-f> dofind
bind . <Control-g> findnext
bind . <Control-r> findprev
bind . <Control-equal> {incrfont 1}
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 $sha1entry <<PasteSelection>> clearsha1
set maincursor [. cget -cursor]
set textcursor [$ctext cget -cursor]
set rowctxmenu .rowctxmenu
menu $rowctxmenu -tearoff 0
$rowctxmenu add command -label "Diff this -> selected" \
-command {diffvssel 0}
$rowctxmenu add command -label "Diff selected -> this" \
-command {diffvssel 1}
$rowctxmenu add command -label "Make patch" -command mkpatch
$rowctxmenu add command -label "Create tag" -command mktag
$rowctxmenu add command -label "Write commit to file" -command writecommit
}
# when we make a key binding for the toplevel, make sure
# it doesn't get triggered when that key is pressed in the
# find string entry widget.
proc bindkey {ev script} {
global entries
bind . $ev $script
set escript [bind Entry $ev]
if {$escript == {}} {
set escript [bind Entry <Key>]
}
foreach e $entries {
bind $e $ev "$escript; break"
}
}
# set the focus back to the toplevel for any click outside
# the entry widgets
proc click {w} {
global entries
foreach e $entries {
if {$w == $e} return
}
focus .
}
proc savestuff {w} {
global canv canv2 canv3 ctext cflist mainfont textfont
global stuffsaved
if {$stuffsaved} return
if {![winfo viewable .]} return
catch {
set f [open "~/.gitk-new" w]
puts $f "set mainfont {$mainfont}"
puts $f "set textfont {$textfont}"
puts $f "set geometry(width) [winfo width .ctop]"
puts $f "set geometry(height) [winfo height .ctop]"
puts $f "set geometry(canv1) [expr [winfo width $canv]-2]"
puts $f "set geometry(canv2) [expr [winfo width $canv2]-2]"
puts $f "set geometry(canv3) [expr [winfo width $canv3]-2]"
puts $f "set geometry(canvh) [expr [winfo height $canv]-2]"
set wid [expr {([winfo width $ctext] - 8) \
/ [font measure $textfont "0"]}]
puts $f "set geometry(ctextw) $wid"
set wid [expr {([winfo width $cflist] - 11) \
/ [font measure [$cflist cget -font] "0"]}]
puts $f "set geometry(cflistw) $wid"
close $f
file rename -force "~/.gitk-new" "~/.gitk"
}
set stuffsaved 1
}
proc resizeclistpanes {win w} {
global oldwidth
if [info exists oldwidth($win)] {
set s0 [$win sash coord 0]
set s1 [$win sash coord 1]
if {$w < 60} {
set sash0 [expr {int($w/2 - 2)}]
set sash1 [expr {int($w*5/6 - 2)}]
} else {
set factor [expr {1.0 * $w / $oldwidth($win)}]
set sash0 [expr {int($factor * [lindex $s0 0])}]
set sash1 [expr {int($factor * [lindex $s1 0])}]
if {$sash0 < 30} {
set sash0 30
}
if {$sash1 < $sash0 + 20} {
set sash1 [expr $sash0 + 20]
}
if {$sash1 > $w - 10} {
set sash1 [expr $w - 10]
if {$sash0 > $sash1 - 20} {
set sash0 [expr $sash1 - 20]
}
}
}
$win sash place 0 $sash0 [lindex $s0 1]
$win sash place 1 $sash1 [lindex $s1 1]
}
set oldwidth($win) $w
}
proc resizecdetpanes {win w} {
global oldwidth
if [info exists oldwidth($win)] {
set s0 [$win sash coord 0]
if {$w < 60} {
set sash0 [expr {int($w*3/4 - 2)}]
} else {
set factor [expr {1.0 * $w / $oldwidth($win)}]
set sash0 [expr {int($factor * [lindex $s0 0])}]
if {$sash0 < 45} {
set sash0 45
}
if {$sash0 > $w - 15} {
set sash0 [expr $w - 15]
}
}
$win sash place 0 $sash0 [lindex $s0 1]
}
set oldwidth($win) $w
}
proc allcanvs args {
global canv canv2 canv3
eval $canv $args
eval $canv2 $args
eval $canv3 $args
}
proc bindall {event action} {
global canv canv2 canv3
bind $canv $event $action
bind $canv2 $event $action
bind $canv3 $event $action
}
proc about {} {
set w .about
if {[winfo exists $w]} {
raise $w
return
}
toplevel $w
wm title $w "About gitk"
message $w.m -text {
Gitk version 1.2
Copyright © 2005 Paul Mackerras
Use and redistribute under the terms of the GNU General Public License} \
-justify center -aspect 400
pack $w.m -side top -fill x -padx 20 -pady 20
button $w.ok -text Close -command "destroy $w"
pack $w.ok -side bottom
}
proc assigncolor {id} {
global commitinfo colormap commcolors colors nextcolor
global parents nparents children nchildren
global cornercrossings crossings
if [info exists colormap($id)] return
set ncolors [llength $colors]
if {$nparents($id) <= 1 && $nchildren($id) == 1} {
set child [lindex $children($id) 0]
if {[info exists colormap($child)]
&& $nparents($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)
}
}
if {[llength $badcolors] >= $ncolors} {
set badcolors {}
}
}
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 - 1} {
foreach child $children($id) {
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)
}
}
}
}
if {[llength $badcolors] >= $ncolors} {
set badcolors $origbad
}
}
for {set i 0} {$i <= $ncolors} {incr i} {
set c [lindex $colors $nextcolor]
if {[incr nextcolor] >= $ncolors} {
set nextcolor 0
}
if {[lsearch -exact $badcolors $c]} break
}
set colormap($id) $c
}
proc initgraph {} {
global canvy canvy0 lineno numcommits lthickness nextcolor linespc
global mainline sidelines
global nchildren ncleft
allcanvs delete all
set nextcolor 0
set canvy $canvy0
set lineno -1
set numcommits 0
set lthickness [expr {int($linespc / 9) + 1}]
catch {unset mainline}
catch {unset sidelines}
foreach id [array names nchildren] {
set ncleft($id) $nchildren($id)
}
}
proc bindline {t id} {
global canv
$canv bind $t <Enter> "lineenter %x %y $id"
$canv bind $t <Motion> "linemotion %x %y $id"
$canv bind $t <Leave> "lineleave $id"
$canv bind $t <Button-1> "lineclick %x %y $id"
}
proc drawcommitline {level} {
global parents children nparents nchildren todo
global canv canv2 canv3 mainfont namefont canvx0 canvy linespc
global lineid linehtag linentag linedtag commitinfo
global colormap numcommits currentparents dupparents
global oldlevel oldnlines oldtodo
global idtags idline idheads
global lineno lthickness mainline sidelines
global commitlisted rowtextx idpos
incr numcommits
incr lineno
set id [lindex $todo $level]
set lineid($lineno) $id
set idline($id) $lineno
set ofill [expr {[info exists commitlisted($id)]? "blue": "white"}]
if {![info exists commitinfo($id)]} {
readcommit $id
if {![info exists commitinfo($id)]} {
set commitinfo($id) {"No commit information available"}
set nparents($id) 0
}
}
assigncolor $id
set currentparents {}
set dupparents {}
if {[info exists commitlisted($id)] && [info exists parents($id)]} {
foreach p $parents($id) {
if {[lsearch -exact $currentparents $p] < 0} {
lappend currentparents $p
} else {
# remember that this parent was listed twice
lappend dupparents $p
}
}
}
set x [expr $canvx0 + $level * $linespc]
set y1 $canvy
set canvy [expr $canvy + $linespc]
allcanvs conf -scrollregion \
[list 0 0 0 [expr $y1 + 0.5 * $linespc + 2]]
if {[info exists mainline($id)]} {
lappend mainline($id) $x $y1
set t [$canv create line $mainline($id) \
-width $lthickness -fill $colormap($id)]
$canv lower $t
bindline $t $id
}
if {[info exists sidelines($id)]} {
foreach ls $sidelines($id) {
set coords [lindex $ls 0]
set thick [lindex $ls 1]
set t [$canv create line $coords -fill $colormap($id) \
-width [expr {$thick * $lthickness}]]
$canv lower $t
bindline $t $id
}
}
set orad [expr {$linespc / 3}]
set t [$canv create oval [expr $x - $orad] [expr $y1 - $orad] \
[expr $x + $orad - 1] [expr $y1 + $orad - 1] \
-fill $ofill -outline black -width 1]
$canv raise $t
$canv bind $t <1> {selcanvline {} %x %y}
set xt [expr $canvx0 + [llength $todo] * $linespc]
if {[llength $currentparents] > 2} {
set xt [expr {$xt + ([llength $currentparents] - 2) * $linespc}]
}
set rowtextx($lineno) $xt
set idpos($id) [list $x $xt $y1]
if {[info exists idtags($id)] || [info exists idheads($id)]} {
set xt [drawtags $id $x $xt $y1]
}
set headline [lindex $commitinfo($id) 0]
set name [lindex $commitinfo($id) 1]
set date [lindex $commitinfo($id) 2]
set linehtag($lineno) [$canv create text $xt $y1 -anchor w \
-text $headline -font $mainfont ]
$canv bind $linehtag($lineno) <Button-3> "rowmenu %X %Y $id"
set linentag($lineno) [$canv2 create text 3 $y1 -anchor w \
-text $name -font $namefont]
set linedtag($lineno) [$canv3 create text 3 $y1 -anchor w \
-text $date -font $mainfont]
}
proc drawtags {id x xt y1} {
global idtags idheads
global linespc lthickness
global canv mainfont
set marks {}
set ntags 0
if {[info exists idtags($id)]} {
set marks $idtags($id)
set ntags [llength $marks]
}
if {[info exists idheads($id)]} {
set marks [concat $marks $idheads($id)]
}
if {$marks eq {}} {
return $xt
}
set delta [expr {int(0.5 * ($linespc - $lthickness))}]
set yt [expr $y1 - 0.5 * $linespc]
set yb [expr $yt + $linespc - 1]
set xvals {}
set wvals {}
foreach tag $marks {
set wid [font measure $mainfont $tag]
lappend xvals $xt
lappend wvals $wid
set xt [expr {$xt + $delta + $wid + $lthickness + $linespc}]
}
set t [$canv create line $x $y1 [lindex $xvals end] $y1 \
-width $lthickness -fill black -tags tag.$id]
$canv lower $t
foreach tag $marks x $xvals wid $wvals {
set xl [expr $x + $delta]
set xr [expr $x + $delta + $wid + $lthickness]
if {[incr ntags -1] >= 0} {
# draw a tag
$canv create polygon $x [expr $yt + $delta] $xl $yt\
$xr $yt $xr $yb $xl $yb $x [expr $yb - $delta] \
-width 1 -outline black -fill yellow -tags tag.$id
} else {
# draw a head
set xl [expr $xl - $delta/2]
$canv create polygon $x $yt $xr $yt $xr $yb $x $yb \
-width 1 -outline black -fill green -tags tag.$id
}
$canv create text $xl $y1 -anchor w -text $tag \
-font $mainfont -tags tag.$id
}
return $xt
}
proc updatetodo {level noshortcut} {
global currentparents ncleft todo
global mainline oldlevel oldtodo oldnlines
global canvx0 canvy linespc mainline
global commitinfo
set oldlevel $level
set oldtodo $todo
set oldnlines [llength $todo]
if {!$noshortcut && [llength $currentparents] == 1} {
set p [lindex $currentparents 0]
if {$ncleft($p) == 1 && [lsearch -exact $todo $p] < 0} {
set ncleft($p) 0
set x [expr $canvx0 + $level * $linespc]
set y [expr $canvy - $linespc]
set mainline($p) [list $x $y]
set todo [lreplace $todo $level $level $p]
return 0
}
}
set todo [lreplace $todo $level $level]
set i $level
foreach p $currentparents {
incr ncleft($p) -1
set k [lsearch -exact $todo $p]
if {$k < 0} {
set todo [linsert $todo $i $p]
incr i
}
}
return 1
}
proc notecrossings {id lo hi corner} {
global oldtodo crossings cornercrossings
for {set i $lo} {[incr i] < $hi} {} {
set p [lindex $oldtodo $i]
if {$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 drawslants {} {
global canv mainline sidelines canvx0 canvy linespc
global oldlevel oldtodo todo currentparents dupparents
global lthickness linespc canvy colormap
set y1 [expr $canvy - $linespc]
set y2 $canvy
set i -1
foreach id $oldtodo {
incr i
if {$id == {}} continue
set xi [expr {$canvx0 + $i * $linespc}]
if {$i == $oldlevel} {
foreach p $currentparents {
set j [lsearch -exact $todo $p]
set coords [list $xi $y1]
set xj [expr {$canvx0 + $j * $linespc}]
if {$j < $i - 1} {
lappend coords [expr $xj + $linespc] $y1
notecrossings $p $j $i [expr {$j + 1}]
} elseif {$j > $i + 1} {
lappend coords [expr $xj - $linespc] $y1
notecrossings $p $i $j [expr {$j - 1}]
}
if {[lsearch -exact $dupparents $p] >= 0} {
# draw a double-width line to indicate the doubled parent
lappend coords $xj $y2
lappend sidelines($p) [list $coords 2]
if {![info exists mainline($p)]} {
set mainline($p) [list $xj $y2]
}
} else {
# normal case, no parent duplicated
if {![info exists mainline($p)]} {
if {$i != $j} {
lappend coords $xj $y2
}
set mainline($p) $coords
} else {
lappend coords $xj $y2
lappend sidelines($p) [list $coords 1]
}
}
}
} elseif {[lindex $todo $i] != $id} {
set j [lsearch -exact $todo $id]
set xj [expr {$canvx0 + $j * $linespc}]
lappend mainline($id) $xi $y1 $xj $y2
}
}
}
proc decidenext {{noread 0}} {
global parents children nchildren ncleft todo
global canv canv2 canv3 mainfont namefont canvx0 canvy linespc
global datemode cdate
global commitinfo
global currentparents oldlevel oldnlines oldtodo
global lineno lthickness
# remove the null entry if present
set nullentry [lsearch -exact $todo {}]
if {$nullentry >= 0} {
set todo [lreplace $todo $nullentry $nullentry]
}
# choose which one to do next time around
set todol [llength $todo]
set level -1
set latest {}
for {set k $todol} {[incr k -1] >= 0} {} {
set p [lindex $todo $k]
if {$ncleft($p) == 0} {
if {$datemode} {
if {![info exists commitinfo($p)]} {
if {$noread} {
return {}
}
readcommit $p
}
if {$latest == {} || $cdate($p) > $latest} {
set level $k
set latest $cdate($p)
}
} else {
set level $k
break
}
}
}
if {$level < 0} {
if {$todo != {}} {
puts "ERROR: none of the pending commits can be done yet:"
foreach p $todo {
puts " $p ($ncleft($p))"
}
}
return -1
}
# If we are reducing, put in a null entry
if {$todol < $oldnlines} {
if {$nullentry >= 0} {
set i $nullentry
while {$i < $todol
&& [lindex $oldtodo $i] == [lindex $todo $i]} {
incr i
}
} else {
set i $oldlevel
if {$level >= $i} {
incr i
}
}
if {$i < $todol} {
set todo [linsert $todo $i {}]
if {$level >= $i} {
incr level
}
}
}
return $level
}
proc drawcommit {id} {
global phase todo nchildren datemode nextupdate
global startcommits
if {$phase != "incrdraw"} {
set phase incrdraw
set todo $id
set startcommits $id
initgraph
drawcommitline 0