lib / blame.tclon commit git-gui: Allow the user to control the blame/commit split point (d0b741d)
   1# git-gui blame viewer
   2# Copyright (C) 2006, 2007 Shawn Pearce
   3
   4class blame {
   5
   6field commit  ; # input commit to blame
   7field path    ; # input filename to view in $commit
   8
   9field w
  10field w_line
  11field w_cgrp
  12field w_load
  13field w_file
  14field w_cmit
  15field status
  16field old_height
  17
  18field highlight_line   -1 ; # current line selected
  19field highlight_commit {} ; # sha1 of commit selected
  20
  21field total_lines       0  ; # total length of file
  22field blame_lines       0  ; # number of lines computed
  23field commit_count      0  ; # number of commits in $commit_list
  24field commit_list      {}  ; # list of commit sha1 in receipt order
  25field order                ; # array commit -> receipt order
  26field header               ; # array commit,key -> header field
  27field line_commit          ; # array line -> sha1 commit
  28field line_file            ; # array line -> file name
  29
  30field r_commit      ; # commit currently being parsed
  31field r_orig_line   ; # original line number
  32field r_final_line  ; # final line number
  33field r_line_count  ; # lines in this region
  34
  35field tooltip_wm     {} ; # Current tooltip toplevel, if open
  36field tooltip_timer  {} ; # Current timer event for our tooltip
  37field tooltip_commit {} ; # Commit in tooltip
  38field tooltip_text   {} ; # Text in current tooltip
  39
  40variable active_color #98e1a0
  41variable group_colors {
  42        #cbcbcb
  43        #e1e1e1
  44}
  45
  46constructor new {i_commit i_path} {
  47        variable active_color
  48        global cursor_ptr
  49
  50        set commit $i_commit
  51        set path   $i_path
  52
  53        make_toplevel top w
  54        wm title $top "[appname] ([reponame]): File Viewer"
  55        set status "Loading $commit:$path..."
  56
  57        label $w.path -text "$commit:$path" \
  58                -anchor w \
  59                -justify left \
  60                -borderwidth 1 \
  61                -relief sunken \
  62                -font font_uibold
  63
  64        panedwindow $w.file_pane -orient vertical
  65        frame $w.file_pane.out
  66        frame $w.file_pane.cm
  67        $w.file_pane add $w.file_pane.out \
  68                -sticky nsew \
  69                -minsize 100 \
  70                -height 100 \
  71                -width 100
  72        $w.file_pane add $w.file_pane.cm \
  73                -sticky nsew \
  74                -minsize 25 \
  75                -height 25 \
  76                -width 100
  77
  78        set w_load $w.file_pane.out.loaded_t
  79        text $w_load \
  80                -background white -borderwidth 0 \
  81                -state disabled \
  82                -wrap none \
  83                -height 40 \
  84                -width 1 \
  85                -font font_diff
  86        $w_load tag conf annotated -background grey
  87
  88        set w_line $w.file_pane.out.linenumber_t
  89        text $w_line \
  90                -background white -borderwidth 0 \
  91                -state disabled \
  92                -wrap none \
  93                -height 40 \
  94                -width 5 \
  95                -font font_diff
  96        $w_line tag conf linenumber -justify right
  97
  98        set w_cgrp $w.file_pane.out.commit_t
  99        text $w_cgrp \
 100                -background white -borderwidth 0 \
 101                -state disabled \
 102                -wrap none \
 103                -height 40 \
 104                -width 4 \
 105                -font font_diff
 106
 107        set w_file $w.file_pane.out.file_t
 108        text $w_file \
 109                -background white -borderwidth 0 \
 110                -state disabled \
 111                -wrap none \
 112                -height 40 \
 113                -width 80 \
 114                -xscrollcommand [list $w.file_pane.out.sbx set] \
 115                -font font_diff
 116
 117        scrollbar $w.file_pane.out.sbx \
 118                -orient h \
 119                -command [list $w_file xview]
 120        scrollbar $w.file_pane.out.sby \
 121                -orient v \
 122                -command [list scrollbar2many [list \
 123                $w_load \
 124                $w_line \
 125                $w_cgrp \
 126                $w_file \
 127                ] yview]
 128        grid \
 129                $w_cgrp \
 130                $w_line \
 131                $w_load \
 132                $w_file \
 133                $w.file_pane.out.sby \
 134                -sticky nsew
 135        grid conf $w.file_pane.out.sbx -column 3 -sticky we
 136        grid columnconfigure $w.file_pane.out 3 -weight 1
 137        grid rowconfigure $w.file_pane.out 0 -weight 1
 138
 139        label $w.status \
 140                -textvariable @status \
 141                -anchor w \
 142                -justify left \
 143                -borderwidth 1 \
 144                -relief sunken
 145
 146        set w_cmit $w.file_pane.cm.t
 147        text $w_cmit \
 148                -background white -borderwidth 0 \
 149                -state disabled \
 150                -wrap none \
 151                -height 10 \
 152                -width 80 \
 153                -xscrollcommand [list $w.file_pane.cm.sbx set] \
 154                -yscrollcommand [list $w.file_pane.cm.sby set] \
 155                -font font_diff
 156        $w_cmit tag conf header_key \
 157                -tabs {3c} \
 158                -background $active_color \
 159                -font font_uibold
 160        $w_cmit tag conf header_val \
 161                -background $active_color \
 162                -font font_ui
 163        $w_cmit tag raise sel
 164        scrollbar $w.file_pane.cm.sbx \
 165                -orient h \
 166                -command [list $w_cmit xview]
 167        scrollbar $w.file_pane.cm.sby \
 168                -orient v \
 169                -command [list $w_cmit yview]
 170        pack $w.file_pane.cm.sby -side right -fill y
 171        pack $w.file_pane.cm.sbx -side bottom -fill x
 172        pack $w_cmit -expand 1 -fill both
 173
 174        menu $w.ctxm -tearoff 0
 175        $w.ctxm add command \
 176                -label "Copy Commit" \
 177                -command [cb _copycommit]
 178
 179        foreach i [list \
 180                $w_cgrp \
 181                $w_load \
 182                $w_line \
 183                $w_file] {
 184                $i conf -cursor $cursor_ptr
 185                $i conf -yscrollcommand \
 186                        [list many2scrollbar [list \
 187                        $w_cgrp \
 188                        $w_load \
 189                        $w_line \
 190                        $w_file \
 191                        ] yview $w.file_pane.out.sby]
 192                bind $i <Button-1> "
 193                        [cb _hide_tooltip]
 194                        [cb _click $i @%x,%y]
 195                        focus $i
 196                "
 197                bind $i <Any-Motion>  [cb _show_tooltip $i @%x,%y]
 198                bind $i <Any-Enter>   [cb _hide_tooltip]
 199                bind $i <Any-Leave>   [cb _hide_tooltip]
 200                bind_button3 $i "
 201                        [cb _hide_tooltip]
 202                        set cursorX %x
 203                        set cursorY %y
 204                        set cursorW %W
 205                        tk_popup $w.ctxm %X %Y
 206                "
 207        }
 208
 209        foreach i [list \
 210                $w_cgrp \
 211                $w_load \
 212                $w_line \
 213                $w_file \
 214                $w_cmit] {
 215                bind $i <Key-Up>        {catch {%W yview scroll -1 units};break}
 216                bind $i <Key-Down>      {catch {%W yview scroll  1 units};break}
 217                bind $i <Key-Left>      {catch {%W xview scroll -1 units};break}
 218                bind $i <Key-Right>     {catch {%W xview scroll  1 units};break}
 219                bind $i <Key-k>         {catch {%W yview scroll -1 units};break}
 220                bind $i <Key-j>         {catch {%W yview scroll  1 units};break}
 221                bind $i <Key-h>         {catch {%W xview scroll -1 units};break}
 222                bind $i <Key-l>         {catch {%W xview scroll  1 units};break}
 223                bind $i <Control-Key-b> {catch {%W yview scroll -1 pages};break}
 224                bind $i <Control-Key-f> {catch {%W yview scroll  1 pages};break}
 225        }
 226
 227        bind $w_cmit <Button-1> [list focus $w_cmit]
 228        bind $top <Visibility> [list focus $top]
 229        bind $top <Destroy> [list delete_this $this]
 230
 231        grid configure $w.path -sticky ew
 232        grid configure $w.file_pane -sticky nsew
 233        grid configure $w.status -sticky ew
 234        grid columnconfigure $top 0 -weight 1
 235        grid rowconfigure $top 0 -weight 0
 236        grid rowconfigure $top 1 -weight 1
 237        grid rowconfigure $top 2 -weight 0
 238
 239        set req_w [winfo reqwidth  $top]
 240        set req_h [winfo reqheight $top]
 241        if {$req_w < 600} {set req_w 600}
 242        if {$req_h < 400} {set req_h 400}
 243        set g "${req_w}x${req_h}"
 244        wm geometry $top $g
 245        update
 246
 247        set old_height [winfo height $w.file_pane]
 248        $w.file_pane sash place 0 \
 249                [lindex [$w.file_pane sash coord 0] 0] \
 250                [expr {int($old_height * 0.70)}]
 251        bind $w.file_pane <Configure> \
 252        "if {{$w.file_pane} eq {%W}} {[cb _resize %h]}"
 253
 254        if {$commit eq {}} {
 255                set fd [open $path r]
 256        } else {
 257                set cmd [list git cat-file blob "$commit:$path"]
 258                set fd [open "| $cmd" r]
 259        }
 260        fconfigure $fd -blocking 0 -translation lf -encoding binary
 261        fileevent $fd readable [cb _read_file $fd]
 262}
 263
 264method _read_file {fd} {
 265        $w_load conf -state normal
 266        $w_cgrp conf -state normal
 267        $w_line conf -state normal
 268        $w_file conf -state normal
 269        while {[gets $fd line] >= 0} {
 270                regsub "\r\$" $line {} line
 271                incr total_lines
 272
 273                if {$total_lines > 1} {
 274                        $w_load insert end "\n"
 275                        $w_cgrp insert end "\n"
 276                        $w_line insert end "\n"
 277                        $w_file insert end "\n"
 278                }
 279
 280                $w_line insert end "$total_lines" linenumber
 281                $w_file insert end "$line"
 282        }
 283        $w_load conf -state disabled
 284        $w_cgrp conf -state disabled
 285        $w_line conf -state disabled
 286        $w_file conf -state disabled
 287
 288        if {[eof $fd]} {
 289                close $fd
 290                _status $this
 291                set cmd [list git blame -M -C --incremental]
 292                if {$commit eq {}} {
 293                        lappend cmd --contents $path
 294                } else {
 295                        lappend cmd $commit
 296                }
 297                lappend cmd -- $path
 298                set fd [open "| $cmd" r]
 299                fconfigure $fd -blocking 0 -translation lf -encoding binary
 300                fileevent $fd readable [cb _read_blame $fd]
 301        }
 302} ifdeleted { catch {close $fd} }
 303
 304method _read_blame {fd} {
 305        variable group_colors
 306
 307        $w_cgrp conf -state normal
 308        while {[gets $fd line] >= 0} {
 309                if {[regexp {^([a-z0-9]{40}) (\d+) (\d+) (\d+)$} $line line \
 310                        cmit original_line final_line line_count]} {
 311                        set r_commit     $cmit
 312                        set r_orig_line  $original_line
 313                        set r_final_line $final_line
 314                        set r_line_count $line_count
 315
 316                        if {[catch {set g $order($cmit)}]} {
 317                                set bg [lindex $group_colors 0]
 318                                set group_colors [lrange $group_colors 1 end]
 319                                lappend group_colors $bg
 320
 321                                $w_cgrp tag conf g$cmit -background $bg
 322                                $w_line tag conf g$cmit -background $bg
 323                                $w_file tag conf g$cmit -background $bg
 324
 325                                set order($cmit) $commit_count
 326                                incr commit_count
 327                                lappend commit_list $cmit
 328                        }
 329                } elseif {[string match {filename *} $line]} {
 330                        set file [string range $line 9 end]
 331                        set n    $r_line_count
 332                        set lno  $r_final_line
 333                        set cmit $r_commit
 334
 335                        if {[regexp {^0{40}$} $cmit]} {
 336                                set commit_abbr work
 337                        } else {
 338                                set commit_abbr [string range $cmit 0 4]
 339                        }
 340
 341                        set author_abbr {}
 342                        set a_name {}
 343                        catch {set a_name $header($cmit,author)}
 344                        while {$a_name ne {}} {
 345                                if {![regexp {^([[:upper:]])} $a_name _a]} break
 346                                append author_abbr $_a
 347                                unset _a
 348                                if {![regsub \
 349                                        {^[[:upper:]][^\s]*\s+} \
 350                                        $a_name {} a_name ]} break
 351                        }
 352                        if {$author_abbr eq {}} {
 353                                set author_abbr { |}
 354                        } else {
 355                                set author_abbr [string range $author_abbr 0 3]
 356                                while {[string length $author_abbr] < 4} {
 357                                        set author_abbr " $author_abbr"
 358                                }
 359                        }
 360                        unset a_name
 361
 362                        set first_lno $lno
 363                        while {
 364                        ![catch {set ncmit $line_commit([expr {$first_lno - 1}])}]
 365                        && $ncmit eq $cmit
 366                        } {
 367                                incr first_lno -1
 368                        }
 369
 370                        while {$n > 0} {
 371                                set lno_e "$lno.0 lineend + 1c"
 372                                if {[catch {set g g$line_commit($lno)}]} {
 373                                        $w_load tag add annotated $lno.0 $lno_e
 374                                } else {
 375                                        $w_cgrp tag remove g$g $lno.0 $lno_e
 376                                        $w_line tag remove g$g $lno.0 $lno_e
 377                                        $w_file tag remove g$g $lno.0 $lno_e
 378
 379                                        $w_cgrp tag remove a$g $lno.0 $lno_e
 380                                        $w_line tag remove a$g $lno.0 $lno_e
 381                                        $w_file tag remove a$g $lno.0 $lno_e
 382                                }
 383
 384                                set line_commit($lno) $cmit
 385                                set line_file($lno)   $file
 386
 387                                $w_cgrp delete $lno.0 "$lno.0 lineend"
 388                                if {$lno == $first_lno} {
 389                                        $w_cgrp insert $lno.0 $commit_abbr
 390                                } elseif {$lno == [expr {$first_lno + 1}]} {
 391                                        $w_cgrp insert $lno.0 $author_abbr
 392                                } else {
 393                                        $w_cgrp insert $lno.0 { |}
 394                                }
 395
 396                                $w_cgrp tag add g$cmit $lno.0 $lno_e
 397                                $w_line tag add g$cmit $lno.0 $lno_e
 398                                $w_file tag add g$cmit $lno.0 $lno_e
 399
 400                                $w_cgrp tag add a$cmit $lno.0 $lno_e
 401                                $w_line tag add a$cmit $lno.0 $lno_e
 402                                $w_file tag add a$cmit $lno.0 $lno_e
 403
 404                                if {$highlight_line == -1} {
 405                                        if {[lindex [$w_file yview] 0] == 0} {
 406                                                $w_file see $lno.0
 407                                                _showcommit $this $lno
 408                                        }
 409                                } elseif {$highlight_line == $lno} {
 410                                        _showcommit $this $lno
 411                                }
 412
 413                                incr n -1
 414                                incr lno
 415                                incr blame_lines
 416                        }
 417
 418                        while {![catch {set ncmit $line_commit($lno)}]
 419                                && $ncmit eq $cmit} {
 420                                $w_cgrp delete $lno.0 "$lno.0 lineend"
 421
 422                                if {$lno == $first_lno} {
 423                                        $w_cgrp insert $lno.0 $commit_abbr
 424                                } elseif {$lno == [expr {$first_lno + 1}]} {
 425                                        $w_cgrp insert $lno.0 $author_abbr
 426                                } else {
 427                                        $w_cgrp insert $lno.0 { |}
 428                                }
 429                                incr lno
 430                        }
 431
 432                } elseif {[regexp {^([a-z-]+) (.*)$} $line line key data]} {
 433                        set header($r_commit,$key) $data
 434                }
 435        }
 436        $w_cgrp conf -state disabled
 437
 438        if {[eof $fd]} {
 439                close $fd
 440                set status {Annotation complete.}
 441        } else {
 442                _status $this
 443        }
 444} ifdeleted { catch {close $fd} }
 445
 446method _status {} {
 447        set have  $blame_lines
 448        set total $total_lines
 449        set pdone 0
 450        if {$total} {set pdone [expr {100 * $have / $total}]}
 451
 452        set status [format \
 453                "Loading annotations... %i of %i lines annotated (%2i%%)" \
 454                $have $total $pdone]
 455}
 456
 457method _click {cur_w pos} {
 458        set lno [lindex [split [$cur_w index $pos] .] 0]
 459        if {$lno eq {}} return
 460        _showcommit $this $lno
 461}
 462
 463method _showcommit {lno} {
 464        global repo_config
 465        variable active_color
 466
 467        if {$highlight_commit ne {}} {
 468                set cmit $highlight_commit
 469                $w_cgrp tag conf a$cmit -background {}
 470                $w_line tag conf a$cmit -background {}
 471                $w_file tag conf a$cmit -background {}
 472        }
 473
 474        $w_cmit conf -state normal
 475        $w_cmit delete 0.0 end
 476        if {[catch {set cmit $line_commit($lno)}]} {
 477                set cmit {}
 478                $w_cmit insert end "Loading annotation..."
 479        } else {
 480                $w_cgrp tag conf a$cmit -background $active_color
 481                $w_line tag conf a$cmit -background $active_color
 482                $w_file tag conf a$cmit -background $active_color
 483
 484                set author_name {}
 485                set author_email {}
 486                set author_time {}
 487                catch {set author_name $header($cmit,author)}
 488                catch {set author_email $header($cmit,author-mail)}
 489                catch {set author_time [clock format \
 490                        $header($cmit,author-time) \
 491                        -format {%Y-%m-%d %H:%M:%S}
 492                ]}
 493
 494                set committer_name {}
 495                set committer_email {}
 496                set committer_time {}
 497                catch {set committer_name $header($cmit,committer)}
 498                catch {set committer_email $header($cmit,committer-mail)}
 499                catch {set committer_time [clock format \
 500                        $header($cmit,committer-time) \
 501                        -format {%Y-%m-%d %H:%M:%S}
 502                ]}
 503
 504                if {[catch {set msg $header($cmit,message)}]} {
 505                        set msg {}
 506                        catch {
 507                                set fd [open "| git cat-file commit $cmit" r]
 508                                fconfigure $fd -encoding binary -translation lf
 509                                if {[catch {set enc $repo_config(i18n.commitencoding)}]} {
 510                                        set enc utf-8
 511                                }
 512                                while {[gets $fd line] > 0} {
 513                                        if {[string match {encoding *} $line]} {
 514                                                set enc [string tolower [string range $line 9 end]]
 515                                        }
 516                                }
 517                                set msg [encoding convertfrom $enc [read $fd]]
 518                                set msg [string trim $msg]
 519                                close $fd
 520
 521                                set author_name [encoding convertfrom $enc $author_name]
 522                                set committer_name [encoding convertfrom $enc $committer_name]
 523
 524                                set header($cmit,author) $author_name
 525                                set header($cmit,committer) $committer_name
 526                        }
 527                        set header($cmit,message) $msg
 528                }
 529
 530                $w_cmit insert end "commit $cmit\n" header_key
 531                $w_cmit insert end "Author:\t" header_key
 532                $w_cmit insert end "$author_name $author_email" header_val
 533                $w_cmit insert end "$author_time\n" header_val
 534
 535                $w_cmit insert end "Committer:\t" header_key
 536                $w_cmit insert end "$committer_name $committer_email" header_val
 537                $w_cmit insert end "$committer_time\n" header_val
 538
 539                if {$line_file($lno) ne $path} {
 540                        $w_cmit insert end "Original File:\t" header_key
 541                        $w_cmit insert end "[escape_path $line_file($lno)]\n" header_val
 542                }
 543
 544                $w_cmit insert end "\n$msg"
 545        }
 546        $w_cmit conf -state disabled
 547
 548        set highlight_line $lno
 549        set highlight_commit $cmit
 550
 551        if {$highlight_commit eq $tooltip_commit} {
 552                _hide_tooltip $this
 553        }
 554}
 555
 556method _copycommit {} {
 557        set pos @$::cursorX,$::cursorY
 558        set lno [lindex [split [$::cursorW index $pos] .] 0]
 559        if {![catch {set commit $line_commit($lno)}]} {
 560                clipboard clear
 561                clipboard append \
 562                        -format STRING \
 563                        -type STRING \
 564                        -- $commit
 565        }
 566}
 567
 568method _show_tooltip {cur_w pos} {
 569        set lno [lindex [split [$cur_w index $pos] .] 0]
 570        if {[catch {set cmit $line_commit($lno)}]} {
 571                _hide_tooltip $this
 572                return
 573        }
 574
 575        if {$cmit eq $highlight_commit} {
 576                _hide_tooltip $this
 577                return
 578        }
 579
 580        if {$cmit eq $tooltip_commit} {
 581                _position_tooltip $this
 582        } elseif {$tooltip_wm ne {}} {
 583                _open_tooltip $this $cur_w
 584        } elseif {$tooltip_timer eq {}} {
 585                set tooltip_timer [after 1000 [cb _open_tooltip $cur_w]]
 586        }
 587}
 588
 589method _open_tooltip {cur_w} {
 590        set tooltip_timer {}
 591        set pos_x [winfo pointerx $cur_w]
 592        set pos_y [winfo pointery $cur_w]
 593        if {[winfo containing $pos_x $pos_y] ne $cur_w} {
 594                _hide_tooltip $this
 595                return
 596        }
 597
 598        set pos @[join [list \
 599                [expr {$pos_x - [winfo rootx $cur_w]}] \
 600                [expr {$pos_y - [winfo rooty $cur_w]}]] ,]
 601        set lno [lindex [split [$cur_w index $pos] .] 0]
 602        set cmit $line_commit($lno)
 603
 604        set author_name {}
 605        set author_email {}
 606        set author_time {}
 607        catch {set author_name $header($cmit,author)}
 608        catch {set author_email $header($cmit,author-mail)}
 609        catch {set author_time [clock format \
 610                $header($cmit,author-time) \
 611                -format {%Y-%m-%d %H:%M:%S}
 612        ]}
 613
 614        set committer_name {}
 615        set committer_email {}
 616        set committer_time {}
 617        catch {set committer_name $header($cmit,committer)}
 618        catch {set committer_email $header($cmit,committer-mail)}
 619        catch {set committer_time [clock format \
 620                $header($cmit,committer-time) \
 621                -format {%Y-%m-%d %H:%M:%S}
 622        ]}
 623
 624        set summary {}
 625        catch {set summary $header($cmit,summary)}
 626
 627        set tooltip_commit $cmit
 628        set tooltip_text "commit $cmit
 629$author_name $author_email  $author_time
 630$summary"
 631
 632        if {$tooltip_wm ne "$cur_w.tooltip"} {
 633                _hide_tooltip $this
 634
 635                set tooltip_wm [toplevel $cur_w.tooltip -borderwidth 1]
 636                wm overrideredirect $tooltip_wm 1
 637                wm transient $tooltip_wm [winfo toplevel $cur_w]
 638                pack [label $tooltip_wm.label \
 639                        -background lightyellow \
 640                        -foreground black \
 641                        -textvariable @tooltip_text \
 642                        -justify left]
 643        }
 644        _position_tooltip $this
 645}
 646
 647method _position_tooltip {} {
 648        set req_w [winfo reqwidth  $tooltip_wm.label]
 649        set req_h [winfo reqheight $tooltip_wm.label]
 650        set pos_x [expr {[winfo pointerx .] +  5}]
 651        set pos_y [expr {[winfo pointery .] + 10}]
 652
 653        set g "${req_w}x${req_h}"
 654        if {$pos_x >= 0} {append g +}
 655        append g $pos_x
 656        if {$pos_y >= 0} {append g +}
 657        append g $pos_y
 658
 659        wm geometry $tooltip_wm $g
 660        raise $tooltip_wm
 661}
 662
 663method _hide_tooltip {} {
 664        if {$tooltip_wm ne {}} {
 665                destroy $tooltip_wm
 666                set tooltip_wm {}
 667                set tooltip_commit {}
 668        }
 669        if {$tooltip_timer ne {}} {
 670                after cancel $tooltip_timer
 671                set tooltip_timer {}
 672        }
 673}
 674
 675method _resize {new_height} {
 676        set diff [expr {$new_height - $old_height}]
 677        if {$diff == 0} return
 678
 679        set my [expr {[winfo height $w.file_pane] - 25}]
 680        set o [$w.file_pane sash coord 0]
 681        set ox [lindex $o 0]
 682        set oy [expr {[lindex $o 1] + $diff}]
 683        if {$oy < 0}   {set oy 0}
 684        if {$oy > $my} {set oy $my}
 685        $w.file_pane sash place 0 $ox $oy
 686
 687        set old_height $new_height
 688}
 689
 690}