lib/blame.tcl

   1 # git-gui blame viewer
   2 # Copyright (C) 2006, 2007 Shawn Pearce
   3
   4 class blame {
   5
   6 field commit  ; # input commit to blame
   7 field path    ; # input filename to view in $commit
   8
   9 field w
  10 field w_line
  11 field w_load
  12 field w_file
  13 field w_cmit
  14 field status
  15
  16 field highlight_line   -1 ; # current line selected
  17 field highlight_commit {} ; # sha1 of commit selected
  18
  19 field total_lines       0  ; # total length of file
  20 field blame_lines       0  ; # number of lines computed
  21 field commit_count      0  ; # number of commits in $commit_list
  22 field commit_list      {}  ; # list of commit sha1 in receipt order
  23 field order                ; # array commit -> receipt order
  24 field header               ; # array commit,key -> header field
  25 field line_commit          ; # array line -> sha1 commit
  26 field line_file            ; # array line -> file name
  27
  28 field r_commit      ; # commit currently being parsed
  29 field r_orig_line   ; # original line number
  30 field r_final_line  ; # final line number
  31 field r_line_count  ; # lines in this region
  32
  33 constructor new {i_commit i_path} {
  34         set commit $i_commit
  35         set path   $i_path
  36
  37         make_toplevel top w
  38         wm title $top "[appname] ([reponame]): File Viewer"
  39         set status "Loading $commit:$path..."
  40
  41         label $w.path -text "$commit:$path" \
  42                 -anchor w \
  43                 -justify left \
  44                 -borderwidth 1 \
  45                 -relief sunken \
  46                 -font font_uibold
  47         pack $w.path -side top -fill x
  48
  49         frame $w.out
  50         text $w.out.loaded_t \
  51                 -background white -borderwidth 0 \
  52                 -state disabled \
  53                 -wrap none \
  54                 -height 40 \
  55                 -width 1 \
  56                 -font font_diff
  57         $w.out.loaded_t tag conf annotated -background grey
  58
  59         text $w.out.linenumber_t \
  60                 -background white -borderwidth 0 \
  61                 -state disabled \
  62                 -wrap none \
  63                 -height 40 \
  64                 -width 5 \
  65                 -font font_diff
  66         $w.out.linenumber_t tag conf linenumber -justify right
  67
  68         text $w.out.file_t \
  69                 -background white -borderwidth 0 \
  70                 -state disabled \
  71                 -wrap none \
  72                 -height 40 \
  73                 -width 80 \
  74                 -xscrollcommand [list $w.out.sbx set] \
  75                 -font font_diff
  76
  77         scrollbar $w.out.sbx -orient h -command [list $w.out.file_t xview]
  78         scrollbar $w.out.sby -orient v \
  79                 -command [list scrollbar2many [list \
  80                 $w.out.loaded_t \
  81                 $w.out.linenumber_t \
  82                 $w.out.file_t \
  83                 ] yview]
  84         grid \
  85                 $w.out.linenumber_t \
  86                 $w.out.loaded_t \
  87                 $w.out.file_t \
  88                 $w.out.sby \
  89                 -sticky nsew
  90         grid conf $w.out.sbx -column 2 -sticky we
  91         grid columnconfigure $w.out 2 -weight 1
  92         grid rowconfigure $w.out 0 -weight 1
  93         pack $w.out -fill both -expand 1
  94
  95         label $w.status \
  96                 -textvariable @status \
  97                 -anchor w \
  98                 -justify left \
  99                 -borderwidth 1 \
 100                 -relief sunken
 101         pack $w.status -side bottom -fill x
 102
 103         frame $w.cm
 104         text $w.cm.t \
 105                 -background white -borderwidth 0 \
 106                 -state disabled \
 107                 -wrap none \
 108                 -height 10 \
 109                 -width 80 \
 110                 -xscrollcommand [list $w.cm.sbx set] \
 111                 -yscrollcommand [list $w.cm.sby set] \
 112                 -font font_diff
 113         scrollbar $w.cm.sbx -orient h -command [list $w.cm.t xview]
 114         scrollbar $w.cm.sby -orient v -command [list $w.cm.t yview]
 115         pack $w.cm.sby -side right -fill y
 116         pack $w.cm.sbx -side bottom -fill x
 117         pack $w.cm.t -expand 1 -fill both
 118         pack $w.cm -side bottom -fill x
 119
 120         menu $w.ctxm -tearoff 0
 121         $w.ctxm add command \
 122                 -label "Copy Commit" \
 123                 -command [cb _copycommit]
 124
 125         set w_line $w.out.linenumber_t
 126         set w_load $w.out.loaded_t
 127         set w_file $w.out.file_t
 128         set w_cmit $w.cm.t
 129
 130         foreach i [list \
 131                 $w.out.loaded_t \
 132                 $w.out.linenumber_t \
 133                 $w.out.file_t] {
 134                 $i tag conf in_sel \
 135                         -background [$i cget -foreground] \
 136                         -foreground [$i cget -background]
 137                 $i conf -yscrollcommand \
 138                         [list many2scrollbar [list \
 139                         $w.out.loaded_t \
 140                         $w.out.linenumber_t \
 141                         $w.out.file_t \
 142                         ] yview $w.out.sby]
 143                 bind $i <Button-1> "[cb _click $i @%x,%y]; focus $i"
 144                 bind_button3 $i "
 145                         set cursorX %x
 146                         set cursorY %y
 147                         set cursorW %W
 148                         tk_popup $w.ctxm %X %Y
 149                 "
 150         }
 151
 152         foreach i [list \
 153                 $w.out.loaded_t \
 154                 $w.out.linenumber_t \
 155                 $w.out.file_t \
 156                 $w.cm.t] {
 157                 bind $i <Key-Up>        {catch {%W yview scroll -1 units};break}
 158                 bind $i <Key-Down>      {catch {%W yview scroll  1 units};break}
 159                 bind $i <Key-Left>      {catch {%W xview scroll -1 units};break}
 160                 bind $i <Key-Right>     {catch {%W xview scroll  1 units};break}
 161                 bind $i <Key-k>         {catch {%W yview scroll -1 units};break}
 162                 bind $i <Key-j>         {catch {%W yview scroll  1 units};break}
 163                 bind $i <Key-h>         {catch {%W xview scroll -1 units};break}
 164                 bind $i <Key-l>         {catch {%W xview scroll  1 units};break}
 165                 bind $i <Control-Key-b> {catch {%W yview scroll -1 pages};break}
 166                 bind $i <Control-Key-f> {catch {%W yview scroll  1 pages};break}
 167         }
 168
 169         bind $w.cm.t <Button-1> [list focus $w.cm.t]
 170         bind $top <Visibility> [list focus $top]
 171         bind $top <Destroy> [list delete_this $this]
 172
 173         if {$commit eq {}} {
 174                 set fd [open $path r]
 175         } else {
 176                 set cmd [list git cat-file blob "$commit:$path"]
 177                 set fd [open "| $cmd" r]
 178         }
 179         fconfigure $fd -blocking 0 -translation lf -encoding binary
 180         fileevent $fd readable [cb _read_file $fd]
 181 }
 182
 183 method _read_file {fd} {
 184         $w_load conf -state normal
 185         $w_line conf -state normal
 186         $w_file conf -state normal
 187         while {[gets $fd line] >= 0} {
 188                 regsub "\r\$" $line {} line
 189                 incr total_lines
 190                 $w_load insert end "\n"
 191                 $w_line insert end "$total_lines\n" linenumber
 192                 $w_file insert end "$line\n"
 193         }
 194         $w_load conf -state disabled
 195         $w_line conf -state disabled
 196         $w_file conf -state disabled
 197
 198         if {[eof $fd]} {
 199                 close $fd
 200                 _status $this
 201                 set cmd [list git blame -M -C --incremental]
 202                 if {$commit eq {}} {
 203                         lappend cmd --contents $path
 204                 } else {
 205                         lappend cmd $commit
 206                 }
 207                 lappend cmd -- $path
 208                 set fd [open "| $cmd" r]
 209                 fconfigure $fd -blocking 0 -translation lf -encoding binary
 210                 fileevent $fd readable [cb _read_blame $fd]
 211         }
 212 } ifdeleted { catch {close $fd} }
 213
 214 method _read_blame {fd} {
 215         while {[gets $fd line] >= 0} {
 216                 if {[regexp {^([a-z0-9]{40}) (\d+) (\d+) (\d+)$} $line line \
 217                         cmit original_line final_line line_count]} {
 218                         set r_commit     $cmit
 219                         set r_orig_line  $original_line
 220                         set r_final_line $final_line
 221                         set r_line_count $line_count
 222
 223                         if {[catch {set g $order($cmit)}]} {
 224                                 $w_line tag conf g$cmit
 225                                 $w_file tag conf g$cmit
 226                                 $w_line tag raise in_sel
 227                                 $w_file tag raise in_sel
 228                                 $w_file tag raise sel
 229                                 set order($cmit) $commit_count
 230                                 incr commit_count
 231                                 lappend commit_list $cmit
 232                         }
 233                 } elseif {[string match {filename *} $line]} {
 234                         set file [string range $line 9 end]
 235                         set n    $r_line_count
 236                         set lno  $r_final_line
 237                         set cmit $r_commit
 238
 239                         while {$n > 0} {
 240                                 set lno_e "$lno.0 lineend + 1c"
 241                                 if {[catch {set g g$line_commit($lno)}]} {
 242                                         $w_load tag add annotated $lno.0 $lno_e
 243                                 } else {
 244                                         $w_line tag remove g$g $lno.0 $lno_e
 245                                         $w_file tag remove g$g $lno.0 $lno_e
 246                                 }
 247
 248                                 set line_commit($lno) $cmit
 249                                 set line_file($lno)   $file
 250                                 $w_line tag add g$cmit $lno.0 $lno_e
 251                                 $w_file tag add g$cmit $lno.0 $lno_e
 252
 253                                 if {$highlight_line == -1} {
 254                                         if {[lindex [$w_file yview] 0] == 0} {
 255                                                 $w_file see $lno.0
 256                                                 _showcommit $this $lno
 257                                         }
 258                                 } elseif {$highlight_line == $lno} {
 259                                         _showcommit $this $lno
 260                                 }
 261
 262                                 incr n -1
 263                                 incr lno
 264                                 incr blame_lines
 265                         }
 266
 267                         set hc $highlight_commit
 268                         if {$hc ne {}
 269                                 && [expr {$order($hc) + 1}] == $order($cmit)} {
 270                                 _showcommit $this $highlight_line
 271                         }
 272                 } elseif {[regexp {^([a-z-]+) (.*)$} $line line key data]} {
 273                         set header($r_commit,$key) $data
 274                 }
 275         }
 276
 277         if {[eof $fd]} {
 278                 close $fd
 279                 set status {Annotation complete.}
 280         } else {
 281                 _status $this
 282         }
 283 } ifdeleted { catch {close $fd} }
 284
 285 method _status {} {
 286         set have  $blame_lines
 287         set total $total_lines
 288         set pdone 0
 289         if {$total} {set pdone [expr {100 * $have / $total}]}
 290
 291         set status [format \
 292                 "Loading annotations... %i of %i lines annotated (%2i%%)" \
 293                 $have $total $pdone]
 294 }
 295
 296 method _click {cur_w pos} {
 297         set lno [lindex [split [$cur_w index $pos] .] 0]
 298         if {$lno eq {}} return
 299
 300         set lno_e "$lno.0 + 1 line"
 301         $w_line tag remove in_sel 0.0 end
 302         $w_file tag remove in_sel 0.0 end
 303         $w_line tag add in_sel $lno.0 $lno_e
 304         $w_file tag add in_sel $lno.0 $lno_e
 305
 306         _showcommit $this $lno
 307 }
 308
 309 variable blame_colors {
 310         #ff4040
 311         #ff40ff
 312         #4040ff
 313 }
 314
 315 method _showcommit {lno} {
 316         global repo_config
 317         variable blame_colors
 318
 319         if {$highlight_commit ne {}} {
 320                 set idx $order($highlight_commit)
 321                 set i 0
 322                 foreach c $blame_colors {
 323                         set h [lindex $commit_list [expr {$idx - 1 + $i}]]
 324                         $w_line tag conf g$h -background white
 325                         $w_file tag conf g$h -background white
 326                         incr i
 327                 }
 328         }
 329
 330         $w_cmit conf -state normal
 331         $w_cmit delete 0.0 end
 332         if {[catch {set cmit $line_commit($lno)}]} {
 333                 set cmit {}
 334                 $w_cmit insert end "Loading annotation..."
 335         } else {
 336                 set idx $order($cmit)
 337                 set i 0
 338                 foreach c $blame_colors {
 339                         set h [lindex $commit_list [expr {$idx - 1 + $i}]]
 340                         $w_line tag conf g$h -background $c
 341                         $w_file tag conf g$h -background $c
 342                         incr i
 343                 }
 344
 345                 set author_name {}
 346                 set author_email {}
 347                 set author_time {}
 348                 catch {set author_name $header($cmit,author)}
 349                 catch {set author_email $header($cmit,author-mail)}
 350                 catch {set author_time [clock format $header($cmit,author-time)]}
 351
 352                 set committer_name {}
 353                 set committer_email {}
 354                 set committer_time {}
 355                 catch {set committer_name $header($cmit,committer)}
 356                 catch {set committer_email $header($cmit,committer-mail)}
 357                 catch {set committer_time [clock format $header($cmit,committer-time)]}
 358
 359                 if {[catch {set msg $header($cmit,message)}]} {
 360                         set msg {}
 361                         catch {
 362                                 set fd [open "| git cat-file commit $cmit" r]
 363                                 fconfigure $fd -encoding binary -translation lf
 364                                 if {[catch {set enc $repo_config(i18n.commitencoding)}]} {
 365                                         set enc utf-8
 366                                 }
 367                                 while {[gets $fd line] > 0} {
 368                                         if {[string match {encoding *} $line]} {
 369                                                 set enc [string tolower [string range $line 9 end]]
 370                                         }
 371                                 }
 372                                 set msg [encoding convertfrom $enc [read $fd]]
 373                                 set msg [string trim $msg]
 374                                 close $fd
 375
 376                                 set author_name [encoding convertfrom $enc $author_name]
 377                                 set committer_name [encoding convertfrom $enc $committer_name]
 378
 379                                 set header($cmit,author) $author_name
 380                                 set header($cmit,committer) $committer_name
 381                         }
 382                         set header($cmit,message) $msg
 383                 }
 384
 385                 $w_cmit insert end "commit $cmit
 386 Author: $author_name $author_email $author_time
 387 Committer: $committer_name $committer_email $committer_time
 388 Original File: [escape_path $line_file($lno)]
 389
 390 $msg"
 391         }
 392         $w_cmit conf -state disabled
 393
 394         set highlight_line $lno
 395         set highlight_commit $cmit
 396 }
 397
 398 method _copycommit {} {
 399         set pos @$::cursorX,$::cursorY
 400         set lno [lindex [split [$::cursorW index $pos] .] 0]
 401         if {![catch {set commit $line_commit($lno)}]} {
 402                 clipboard clear
 403                 clipboard append \
 404                         -format STRING \
 405                         -type STRING \
 406                         -- $commit
 407         }
 408 }
 409
 410 }