}

/* A Tcl/Tk script used to render diff output.
*/
static const char zDiffScript[] =
@ set prog {
@ package require Tk
@ 
@ array set CFG {
@   TITLE      {Fossil Diff}
@   LN_COL_BG  #dddddd
@   LN_COL_FG  #444444
@   TXT_COL_BG #ffffff
@   TXT_COL_FG #000000
@   MKR_COL_BG #444444

@   FN_FG      #ffffff
@   FN_PAD     5
@   PADX       5
@   WIDTH      80
@   HEIGHT     45
@   LB_HEIGHT  25
@ }
@ 
@ if {![namespace exists ttk]} {
@   interp alias {} ::ttk::scrollbar {} ::scrollbar
@   interp alias {} ::ttk::menubutton {} ::menubutton
@ }
@ 
@ proc dehtml {x} {
@   set x [regsub -all {<[^>]*>} $x {}]
@   return [string map {&amp; & &lt; < &gt; > &#39; ' &quot; \"} $x]
@ }
@ 
@ proc cols {} {
@   return [list .lnA .txtA .mkr .lnB .txtB]
@ }
@ 
@ proc colType {c} {
@   regexp {[a-z]+} $c type
@   return $type
@ }
@ 
@ proc getLine {difftxt N iivar} {
@   upvar $iivar ii
@   if {$ii>=$N} {return -1}
@   set x [lindex $difftxt $ii]
@   incr ii
@   return $x
@ }
@ 
@ proc readDiffs {fossilcmd} {
@   global difftxt
@   if {![info exists difftxt]} {
@     set in [open $fossilcmd r]
@     fconfigure $in -encoding utf-8
@     set difftxt [split [read $in] \n]
@     close $in

@     }
@     if {[string compare -length 6 [getLine $difftxt $N ii] "<table"]} {
@       continue
@     }
@     incr nDiffs
@     set idx [expr {$nDiffs > 1 ? [.txtA index end] : "1.0"}]
@     .wfiles.lb insert end $fn
@ 
@     foreach c [cols] {
@       while {[getLine $difftxt $N ii] ne "<pre>"} continue
@ 
@       if {$nDiffs > 1} {
@         $c insert end \n -
@       }
@       if {[colType $c] eq "txt"} {
@         $c insert end $fn\n fn
@         if {$fn2!=""} {set fn $fn2}
@       } else {
@         $c insert end \n fn
@       }
@       $c insert end \n -
@ 
@       set type [colType $c]
@       set str {}
@       while {[set line [getLine $difftxt $N ii]] ne "</pre>"} {
@         set len [string length [dehtml $line]]
@         if {$len > $widths($type)} {
@           set widths($type) $len
@         }
@         append str $line\n
@       }
@ 
@       set re {<span class="diff([a-z]+)">([^<]*)</span>}
@       # Use \r as separator since it can't appear in the diff output (it gets
@       # converted to a space).
@       set str [regsub -all $re $str "\r\\1\r\\2\r"]
@       foreach {pre class mid} [split $str \r] {
@         if {$class ne ""} {
@           $c insert end [dehtml $pre] - [dehtml $mid] [list $class -]
@         } else {
@           $c insert end [dehtml $pre] -
@         }
@       }
@     }
@   }
@ 
@   foreach c [cols] {
@     set type [colType $c]
@     if {$type ne "txt"} {
@       $c config -width $widths($type)
@     }
@     $c config -state disabled
@   }
@   if {$nDiffs <= [.wfiles.lb cget -height]} {
@     .wfiles.lb config -height $nDiffs
@     grid remove .wfiles.sb
@   }
@ 
@   return $nDiffs
@ }
@ 
@ proc viewDiff {idx} {
@   .txtA yview $idx
@   .txtA xview moveto 0
@ }
@ 
@ proc cycleDiffs {{reverse 0}} {
@   if {$reverse} {
@     set range [.txtA tag prevrange fn @0,0 1.0]
@     if {$range eq ""} {
@       viewDiff {fn.last -1c}
@     } else {
@       viewDiff [lindex $range 0]
@     }
@   } else {
@     set range [.txtA tag nextrange fn {@0,0 +1c} end]
@     if {$range eq "" || [lindex [.txtA yview] 1] == 1} {
@       viewDiff fn.first
@     } else {
@       viewDiff [lindex $range 0]
@     }
@   }
@ }
@ 
@ proc xvis {col} {
@   set view [$col xview]
@   return [expr {[lindex $view 1]-[lindex $view 0]}]
@ }
@ 
@ proc scroll-x {args} {
@   set c .txt[expr {[xvis .txtA] < [xvis .txtB] ? "A" : "B"}]
@   eval $c xview $args
@ }
@ 
@ interp alias {} scroll-y {} .txtA yview
@ 
@ proc noop {args} {}
@ 
@ proc enableSync {axis} {
@   update idletasks
@   interp alias {} sync-$axis {}
@   rename _sync-$axis sync-$axis
@ }
@ 
@ proc disableSync {axis} {
@   rename sync-$axis _sync-$axis
@   interp alias {} sync-$axis {} noop
@ }
@ 
@ proc sync-x {col first last} {
@   disableSync x
@   $col xview moveto [expr {$first*[xvis $col]/($last-$first)}]
@   foreach side {A B} {
@     set sb .sbx$side
@     set xview [.txt$side xview]
@     if {[lindex $xview 0] > 0 || [lindex $xview 1] < 1} {
@       grid $sb
@       eval $sb set $xview
@     } else {
@       grid remove $sb
@     }
@   }
@   enableSync x
@ }
@ 
@ proc sync-y {first last} {
@   disableSync y
@   foreach c [cols] {
@     $c yview moveto $first
@   }
@   if {$first > 0 || $last < 1} {
@     grid .sby
@     .sby set $first $last
@   } else {
@     grid remove .sby
@   }
@   enableSync y
@ }
@ 
@ wm withdraw .
@ wm title . $CFG(TITLE)
@ wm iconname . $CFG(TITLE)
@ bind . <q> exit
@ bind . <Destroy> {after 0 exit}
@ bind . <Tab> {cycleDiffs; break}
@ bind . <<PrevWindow>> {cycleDiffs 1; break}

@   Next  y {scroll 1 page}
@   Home  y {moveto 0}
@   End   y {moveto 1}
@ } {
@   bind . <$key> "scroll-$axis $args; break"
@   bind . <Shift-$key> continue
@ }
@ 
@ frame .bb
@ ::ttk::menubutton .bb.files -text "Files"
@ toplevel .wfiles
@ wm withdraw .wfiles
@ update idletasks
@ wm transient .wfiles .
@ wm overrideredirect .wfiles 1

@     break
@   }
@ }
@ bind .wfiles.lb <Motion> {
@   %W selection clear 0 end
@   %W selection set @%x,%y
@ }
@ 
@ foreach {side syncCol} {A .txtB B .txtA} {
@   set ln .ln$side
@   text $ln
@   $ln tag config - -justify right
@ 
@   set txt .txt$side
@   text $txt -width $CFG(WIDTH) -height $CFG(HEIGHT) -wrap none \
@     -xscroll "sync-x $syncCol"
@   catch {$txt config -tabstyle wordprocessor} ;# Required for Tk>=8.5
@   foreach tag {add rm chng} {
@     $txt tag config $tag -background $CFG([string toupper $tag]_BG)
@     $txt tag lower $tag
@   }
@   $txt tag config fn -background $CFG(FN_BG) -foreground $CFG(FN_FG) \
@     -justify center
@ }
@ text .mkr
@ 
@ foreach c [cols] {
@   set keyPrefix [string toupper [colType $c]]_COL_
@   if {[tk windowingsystem] eq "win32"} {$c config -font {courier 9}}
@   $c config -bg $CFG(${keyPrefix}BG) -fg $CFG(${keyPrefix}FG) -borderwidth 0 \
@     -padx $CFG(PADX) -yscroll sync-y
@   $c tag config hr -spacing1 $CFG(HR_PAD_TOP) -spacing3 $CFG(HR_PAD_BTM) \
@      -foreground $CFG(HR_FG)
@   $c tag config fn -spacing1 $CFG(FN_PAD) -spacing3 $CFG(FN_PAD)
@   bindtags $c ". $c Text all"
@   bind $c <1> {focus %W}
@ }
@ 
@ ::ttk::scrollbar .sby -command {.txtA yview} -orient vertical
@ ::ttk::scrollbar .sbxA -command {.txtA xview} -orient horizontal
@ ::ttk::scrollbar .sbxB -command {.txtB xview} -orient horizontal
@ frame .spacer
@ 
@ if {[readDiffs $fossilcmd] == 0} {
@   tk_messageBox -type ok -title $CFG(TITLE) -message "No changes"
@   exit
@ }
@ update idletasks
@ 
@ proc saveDiff {} {
@   set fn [tk_getSaveFile]
@   set out [open $fn wb]
@   puts $out "#!/usr/bin/tclsh\n#\n# Run this script using 'tclsh' or 'wish'"
@   puts $out "# to see the graphical diff.\n#"
@   puts $out "set fossilcmd {}"
@   puts $out "set prog [list $::prog]"

@ grid columnconfigure . 4 -weight 1
@ grid .bb -row 0 -columnspan 6
@ eval grid [cols] -row 1 -sticky nsew
@ grid .sby -row 1 -column 5 -sticky ns
@ grid .sbxA -row 2 -columnspan 2 -sticky ew
@ grid .spacer -row 2 -column 2
@ grid .sbxB -row 2 -column 3 -columnspan 2 -sticky ew
@ 
@ .spacer config -height [winfo height .sbxA]
@ wm deiconify .
@ }
@ eval $prog
;

/*