lib/blame.tcl

   1 # git-gui blame viewer
   2 # Copyright (C) 2006, 2007 Shawn Pearce
   3
   4 class blame {
   5
   6 image create photo ::blame::img_back_arrow -data {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}
   7
   8 # Persistant data (survives loads)
   9 #
  10 field history {}; # viewer history: {commit path}
  11 field header    ; # array commit,key -> header field
  12
  13 # Tk UI control paths
  14 #
  15 field w          ; # top window in this viewer
  16 field w_back     ; # our back button
  17 field w_path     ; # label showing the current file path
  18 field w_columns  ; # list of all column widgets in the viewer
  19 field w_line     ; # text column: all line numbers
  20 field w_amov     ; # text column: annotations + move tracking
  21 field w_file     ; # text column: actual file data
  22 field w_cviewer  ; # pane showing commit message
  23 field status     ; # text variable bound to status bar
  24 field old_height ; # last known height of $w.file_pane
  25
  26 # Tk UI colors
  27 #
  28 field active_color #c0edc5
  29 field group_colors {
  30         #d6d6d6
  31         #e1e1e1
  32         #ececec
  33 }
  34
  35 # Current blame data; cleared/reset on each load
  36 #
  37 field commit               ; # input commit to blame
  38 field path                 ; # input filename to view in $commit
  39
  40 field current_fd        {} ; # background process running
  41 field highlight_line    -1 ; # current line selected
  42 field highlight_commit  {} ; # sha1 of commit selected
  43 field old_bgcolor       {} ; # background of current selection
  44
  45 field total_lines       0  ; # total length of file
  46 field blame_lines       0  ; # number of lines computed
  47 field have_commit          ; # array commit -> 1
  48 field amov_data            ; # list of {commit origfile origline}
  49
  50 field r_commit             ; # commit currently being parsed
  51 field r_orig_line          ; # original line number
  52 field r_final_line         ; # final line number
  53 field r_line_count         ; # lines in this region
  54
  55 field tooltip_wm        {} ; # Current tooltip toplevel, if open
  56 field tooltip_timer     {} ; # Current timer event for our tooltip
  57 field tooltip_commit    {} ; # Commit in tooltip
  58 field tooltip_text      {} ; # Text in current tooltip
  59
  60 constructor new {i_commit i_path} {
  61         global cursor_ptr
  62
  63         set commit $i_commit
  64         set path   $i_path
  65
  66         make_toplevel top w
  67         wm title $top "[appname] ([reponame]): File Viewer"
  68
  69         frame $w.header -background orange
  70         label $w.header.commit_l \
  71                 -text {Commit:} \
  72                 -background orange \
  73                 -anchor w \
  74                 -justify left
  75         set w_back $w.header.commit_b
  76         label $w_back \
  77                 -image ::blame::img_back_arrow \
  78                 -borderwidth 0 \
  79                 -relief flat \
  80                 -state disabled \
  81                 -background orange \
  82                 -activebackground orange
  83         bind $w_back <Button-1> "
  84                 if {\[$w_back cget -state\] eq {normal}} {
  85                         [cb _history_menu]
  86                 }
  87                 "
  88         label $w.header.commit \
  89                 -textvariable @commit \
  90                 -background orange \
  91                 -anchor w \
  92                 -justify left
  93         label $w.header.path_l \
  94                 -text {File:} \
  95                 -background orange \
  96                 -anchor w \
  97                 -justify left
  98         set w_path $w.header.path
  99         label $w_path \
 100                 -background orange \
 101                 -anchor w \
 102                 -justify left
 103         pack $w.header.commit_l -side left
 104         pack $w_back -side left
 105         pack $w.header.commit -side left
 106         pack $w_path -fill x -side right
 107         pack $w.header.path_l -side right
 108
 109         panedwindow $w.file_pane -orient vertical
 110         frame $w.file_pane.out
 111         frame $w.file_pane.cm
 112         $w.file_pane add $w.file_pane.out \
 113                 -sticky nsew \
 114                 -minsize 100 \
 115                 -height 100 \
 116                 -width 100
 117         $w.file_pane add $w.file_pane.cm \
 118                 -sticky nsew \
 119                 -minsize 25 \
 120                 -height 25 \
 121                 -width 100
 122
 123         set w_line $w.file_pane.out.linenumber_t
 124         text $w_line \
 125                 -takefocus 0 \
 126                 -highlightthickness 0 \
 127                 -padx 0 -pady 0 \
 128                 -background white -borderwidth 0 \
 129                 -state disabled \
 130                 -wrap none \
 131                 -height 40 \
 132                 -width 6 \
 133                 -font font_diff
 134         $w_line tag conf linenumber -justify right -rmargin 5
 135
 136         set w_amov $w.file_pane.out.amove_t
 137         text $w_amov \
 138                 -takefocus 0 \
 139                 -highlightthickness 0 \
 140                 -padx 0 -pady 0 \
 141                 -background white -borderwidth 0 \
 142                 -state disabled \
 143                 -wrap none \
 144                 -height 40 \
 145                 -width 4 \
 146                 -font font_diff
 147         $w_amov tag conf curr_commit
 148         $w_amov tag conf prior_commit \
 149                 -foreground blue \
 150                 -underline 1
 151         $w_amov tag bind prior_commit \
 152                 <Button-1> \
 153                 "[cb _load_commit @%x,%y];break"
 154
 155         set w_file $w.file_pane.out.file_t
 156         text $w_file \
 157                 -takefocus 0 \
 158                 -highlightthickness 0 \
 159                 -padx 0 -pady 0 \
 160                 -background white -borderwidth 0 \
 161                 -state disabled \
 162                 -wrap none \
 163                 -height 40 \
 164                 -width 80 \
 165                 -xscrollcommand [list $w.file_pane.out.sbx set] \
 166                 -font font_diff
 167
 168         set w_columns [list $w_amov $w_line $w_file]
 169
 170         scrollbar $w.file_pane.out.sbx \
 171                 -orient h \
 172                 -command [list $w_file xview]
 173         scrollbar $w.file_pane.out.sby \
 174                 -orient v \
 175                 -command [list scrollbar2many $w_columns yview]
 176         eval grid $w_columns $w.file_pane.out.sby -sticky nsew
 177         grid conf \
 178                 $w.file_pane.out.sbx \
 179                 -column [expr {[llength $w_columns] - 1}] \
 180                 -sticky we
 181         grid columnconfigure \
 182                 $w.file_pane.out \
 183                 [expr {[llength $w_columns] - 1}] \
 184                 -weight 1
 185         grid rowconfigure $w.file_pane.out 0 -weight 1
 186
 187         set w_cviewer $w.file_pane.cm.t
 188         text $w_cviewer \
 189                 -background white -borderwidth 0 \
 190                 -state disabled \
 191                 -wrap none \
 192                 -height 10 \
 193                 -width 80 \
 194                 -xscrollcommand [list $w.file_pane.cm.sbx set] \
 195                 -yscrollcommand [list $w.file_pane.cm.sby set] \
 196                 -font font_diff
 197         $w_cviewer tag conf header_key \
 198                 -tabs {3c} \
 199                 -background $active_color \
 200                 -font font_uibold
 201         $w_cviewer tag conf header_val \
 202                 -background $active_color \
 203                 -font font_ui
 204         $w_cviewer tag raise sel
 205         scrollbar $w.file_pane.cm.sbx \
 206                 -orient h \
 207                 -command [list $w_cviewer xview]
 208         scrollbar $w.file_pane.cm.sby \
 209                 -orient v \
 210                 -command [list $w_cviewer yview]
 211         pack $w.file_pane.cm.sby -side right -fill y
 212         pack $w.file_pane.cm.sbx -side bottom -fill x
 213         pack $w_cviewer -expand 1 -fill both
 214
 215         frame $w.status \
 216                 -borderwidth 1 \
 217                 -relief sunken
 218         label $w.status.l \
 219                 -textvariable @status \
 220                 -anchor w \
 221                 -justify left
 222         pack $w.status.l -side left
 223
 224         menu $w.ctxm -tearoff 0
 225         $w.ctxm add command \
 226                 -label "Copy Commit" \
 227                 -command [cb _copycommit]
 228
 229         foreach i $w_columns {
 230                 $i conf -cursor $cursor_ptr
 231                 $i conf -yscrollcommand [list many2scrollbar \
 232                         $w_columns yview $w.file_pane.out.sby]
 233                 bind $i <Button-1> "
 234                         [cb _hide_tooltip]
 235                         [cb _click $i @%x,%y]
 236                         focus $i
 237                 "
 238                 bind $i <Any-Motion>  [cb _show_tooltip $i @%x,%y]
 239                 bind $i <Any-Enter>   [cb _hide_tooltip]
 240                 bind $i <Any-Leave>   [cb _hide_tooltip]
 241                 bind_button3 $i "
 242                         [cb _hide_tooltip]
 243                         set cursorX %x
 244                         set cursorY %y
 245                         set cursorW %W
 246                         tk_popup $w.ctxm %X %Y
 247                 "
 248         }
 249
 250         foreach i [concat $w_columns $w_cviewer] {
 251                 bind $i <Key-Up>        {catch {%W yview scroll -1 units};break}
 252                 bind $i <Key-Down>      {catch {%W yview scroll  1 units};break}
 253                 bind $i <Key-Left>      {catch {%W xview scroll -1 units};break}
 254                 bind $i <Key-Right>     {catch {%W xview scroll  1 units};break}
 255                 bind $i <Key-k>         {catch {%W yview scroll -1 units};break}
 256                 bind $i <Key-j>         {catch {%W yview scroll  1 units};break}
 257                 bind $i <Key-h>         {catch {%W xview scroll -1 units};break}
 258                 bind $i <Key-l>         {catch {%W xview scroll  1 units};break}
 259                 bind $i <Control-Key-b> {catch {%W yview scroll -1 pages};break}
 260                 bind $i <Control-Key-f> {catch {%W yview scroll  1 pages};break}
 261         }
 262
 263         bind $w_cviewer <Button-1> [list focus $w_cviewer]
 264         bind $top <Visibility> [list focus $top]
 265         bind $w_file <Destroy> [list delete_this $this]
 266
 267         grid configure $w.header -sticky ew
 268         grid configure $w.file_pane -sticky nsew
 269         grid configure $w.status -sticky ew
 270         grid columnconfigure $top 0 -weight 1
 271         grid rowconfigure $top 0 -weight 0
 272         grid rowconfigure $top 1 -weight 1
 273         grid rowconfigure $top 2 -weight 0
 274
 275         set req_w [winfo reqwidth  $top]
 276         set req_h [winfo reqheight $top]
 277         if {$req_w < 600} {set req_w 600}
 278         if {$req_h < 400} {set req_h 400}
 279         set g "${req_w}x${req_h}"
 280         wm geometry $top $g
 281         update
 282
 283         set old_height [winfo height $w.file_pane]
 284         $w.file_pane sash place 0 \
 285                 [lindex [$w.file_pane sash coord 0] 0] \
 286                 [expr {int($old_height * 0.70)}]
 287         bind $w.file_pane <Configure> \
 288         "if {{$w.file_pane} eq {%W}} {[cb _resize %h]}"
 289
 290         _load $this
 291 }
 292
 293 method _load {} {
 294         _hide_tooltip $this
 295
 296         if {$total_lines != 0 || $current_fd ne {}} {
 297                 if {$current_fd ne {}} {
 298                         catch {close $current_fd}
 299                         set current_fd {}
 300                 }
 301
 302                 foreach i $w_columns {
 303                         $i conf -state normal
 304                         $i delete 0.0 end
 305                         foreach cmit [array names have_commit] {
 306                                 $i tag delete g$cmit
 307                         }
 308                         $i conf -state disabled
 309                 }
 310
 311                 set highlight_line -1
 312                 set highlight_commit {}
 313                 set total_lines 0
 314                 set blame_lines 0
 315                 array unset have_commit
 316         }
 317
 318         if {[winfo exists $w.status.c]} {
 319                 $w.status.c coords bar 0 0 0 20
 320         } else {
 321                 canvas $w.status.c \
 322                         -width 100 \
 323                         -height [expr {int([winfo reqheight $w.status.l] * 0.6)}] \
 324                         -borderwidth 1 \
 325                         -relief groove \
 326                         -highlightt 0
 327                 $w.status.c create rectangle 0 0 0 20 -tags bar -fill navy
 328                 pack $w.status.c -side right
 329         }
 330
 331         if {$history eq {}} {
 332                 $w_back conf -state disabled
 333         } else {
 334                 $w_back conf -state normal
 335         }
 336         lappend history [list $commit $path]
 337
 338         # Index 0 is always empty.  There is never line 0 as
 339         # we use only 1 based lines, as that matches both with
 340         # git-blame output and with Tk's text widget.
 341         #
 342         set amov_data [list [list]]
 343
 344         set status "Loading $commit:[escape_path $path]..."
 345         $w_path conf -text [escape_path $path]
 346         if {$commit eq {}} {
 347                 set fd [open $path r]
 348         } else {
 349                 set cmd [list git cat-file blob "$commit:$path"]
 350                 set fd [open "| $cmd" r]
 351         }
 352         fconfigure $fd -blocking 0 -translation lf -encoding binary
 353         fileevent $fd readable [cb _read_file $fd]
 354         set current_fd $fd
 355 }
 356
 357 method _history_menu {} {
 358         set m $w.backmenu
 359         if {[winfo exists $m]} {
 360                 $m delete 0 end
 361         } else {
 362                 menu $m -tearoff 0
 363         }
 364
 365         for {set i [expr {[llength $history] - 2}]
 366                 } {$i >= 0} {incr i -1} {
 367                 set e [lindex $history $i]
 368                 set c [lindex $e 0]
 369                 set f [lindex $e 1]
 370
 371                 if {[regexp {^[0-9a-f]{40}$} $c]} {
 372                         set t [string range $c 0 8]...
 373                 } elseif {$c eq {}} {
 374                         set t {Working Directory}
 375                 } else {
 376                         set t $c
 377                 }
 378                 if {![catch {set summary $header($c,summary)}]} {
 379                         append t " $summary"
 380                         if {[string length $t] > 70} {
 381                                 set t [string range $t 0 66]...
 382                         }
 383                 }
 384
 385                 $m add command -label $t -command [cb _goback $i $c $f]
 386         }
 387         set X [winfo rootx $w_back]
 388         set Y [expr {[winfo rooty $w_back] + [winfo height $w_back]}]
 389         tk_popup $m $X $Y
 390 }
 391
 392 method _goback {i c f} {
 393         set history [lrange $history 0 [expr {$i - 1}]]
 394         set commit $c
 395         set path $f
 396         _load $this
 397 }
 398
 399 method _read_file {fd} {
 400         if {$fd ne $current_fd} {
 401                 catch {close $fd}
 402                 return
 403         }
 404
 405         foreach i $w_columns {$i conf -state normal}
 406         while {[gets $fd line] >= 0} {
 407                 regsub "\r\$" $line {} line
 408                 incr total_lines
 409                 lappend amov_data {}
 410
 411                 if {$total_lines > 1} {
 412                         foreach i $w_columns {$i insert end "\n"}
 413                 }
 414
 415                 $w_line insert end "$total_lines" linenumber
 416                 $w_file insert end "$line"
 417         }
 418
 419         set ln_wc [expr {[string length $total_lines] + 2}]
 420         if {[$w_line cget -width] < $ln_wc} {
 421                 $w_line conf -width $ln_wc
 422         }
 423
 424         foreach i $w_columns {$i conf -state disabled}
 425
 426         if {[eof $fd]} {
 427                 close $fd
 428
 429                 _status $this
 430                 set cmd {nice git blame -M -C --incremental}
 431                 if {$commit eq {}} {
 432                         lappend cmd --contents $path
 433                 } else {
 434                         lappend cmd $commit
 435                 }
 436                 lappend cmd -- $path
 437                 set fd [open "| $cmd" r]
 438                 fconfigure $fd -blocking 0 -translation lf -encoding binary
 439                 fileevent $fd readable [cb _read_blame $fd]
 440                 set current_fd $fd
 441         }
 442 } ifdeleted { catch {close $fd} }
 443
 444 method _read_blame {fd} {
 445         if {$fd ne $current_fd} {
 446                 catch {close $fd}
 447                 return
 448         }
 449
 450         $w_amov conf -state normal
 451         while {[gets $fd line] >= 0} {
 452                 if {[regexp {^([a-z0-9]{40}) (\d+) (\d+) (\d+)$} $line line \
 453                         cmit original_line final_line line_count]} {
 454                         set r_commit     $cmit
 455                         set r_orig_line  $original_line
 456                         set r_final_line $final_line
 457                         set r_line_count $line_count
 458
 459                         if {[catch {set g $have_commit($cmit)}]} {
 460                                 set bg [lindex $group_colors 0]
 461                                 set group_colors [lrange $group_colors 1 end]
 462                                 lappend group_colors $bg
 463                                 foreach i $w_columns {
 464                                         $i tag conf g$cmit -background $bg
 465                                 }
 466                                 set have_commit($cmit) 1
 467                         }
 468                 } elseif {[string match {filename *} $line]} {
 469                         set file [string range $line 9 end]
 470                         set n    $r_line_count
 471                         set lno  $r_final_line
 472                         set cmit $r_commit
 473
 474                         if {[regexp {^0{40}$} $cmit]} {
 475                                 set commit_abbr work
 476                                 set commit_type curr_commit
 477                         } elseif {$cmit eq $commit} {
 478                                 set commit_abbr this
 479                                 set commit_type curr_commit
 480                         } else {
 481                                 set commit_type prior_commit
 482                                 set commit_abbr [string range $cmit 0 4]
 483                         }
 484
 485                         set author_abbr {}
 486                         set a_name {}
 487                         catch {set a_name $header($cmit,author)}
 488                         while {$a_name ne {}} {
 489                                 if {![regexp {^([[:upper:]])} $a_name _a]} break
 490                                 append author_abbr $_a
 491                                 unset _a
 492                                 if {![regsub \
 493                                         {^[[:upper:]][^\s]*\s+} \
 494                                         $a_name {} a_name ]} break
 495                         }
 496                         if {$author_abbr eq {}} {
 497                                 set author_abbr { |}
 498                         } else {
 499                                 set author_abbr [string range $author_abbr 0 3]
 500                                 while {[string length $author_abbr] < 4} {
 501                                         set author_abbr " $author_abbr"
 502                                 }
 503                         }
 504                         unset a_name
 505
 506                         set first_lno $lno
 507                         while {
 508                            $first_lno > 1
 509                         && $cmit eq [lindex $amov_data [expr {$first_lno - 1}] 0]
 510                         && $file eq [lindex $amov_data [expr {$first_lno - 1}] 1]
 511                         } {
 512                                 incr first_lno -1
 513                         }
 514
 515                         while {$n > 0} {
 516                                 set lno_e "$lno.0 lineend + 1c"
 517                                 if {[lindex $amov_data $lno] ne {}} {
 518                                         set g [lindex $amov_data $lno 0]
 519                                         foreach i $w_columns {
 520                                                 $i tag remove g$g $lno.0 $lno_e
 521                                         }
 522                                 }
 523                                 lset amov_data $lno [list $cmit $file]
 524
 525                                 $w_amov delete $lno.0 "$lno.0 lineend"
 526                                 if {$lno == $first_lno} {
 527                                         $w_amov insert $lno.0 $commit_abbr $commit_type
 528                                 } elseif {$lno == [expr {$first_lno + 1}]} {
 529                                         $w_amov insert $lno.0 $author_abbr
 530                                 } else {
 531                                         $w_amov insert $lno.0 { |}
 532                                 }
 533
 534                                 foreach i $w_columns {
 535                                         $i tag add g$cmit $lno.0 $lno_e
 536                                 }
 537
 538                                 if {$highlight_line == -1} {
 539                                         if {[lindex [$w_file yview] 0] == 0} {
 540                                                 $w_file see $lno.0
 541                                                 _showcommit $this $lno
 542                                         }
 543                                 } elseif {$highlight_line == $lno} {
 544                                         _showcommit $this $lno
 545                                 }
 546
 547                                 incr n -1
 548                                 incr lno
 549                                 incr blame_lines
 550                         }
 551
 552                         while {
 553                            $cmit eq [lindex $amov_data $lno 0]
 554                         && $file eq [lindex $amov_data $lno 1]
 555                         } {
 556                                 $w_amov delete $lno.0 "$lno.0 lineend"
 557
 558                                 if {$lno == $first_lno} {
 559                                         $w_amov insert $lno.0 $commit_abbr $commit_type
 560                                 } elseif {$lno == [expr {$first_lno + 1}]} {
 561                                         $w_amov insert $lno.0 $author_abbr
 562                                 } else {
 563                                         $w_amov insert $lno.0 { |}
 564                                 }
 565                                 incr lno
 566                         }
 567
 568                 } elseif {[regexp {^([a-z-]+) (.*)$} $line line key data]} {
 569                         set header($r_commit,$key) $data
 570                 }
 571         }
 572         $w_amov conf -state disabled
 573
 574         if {[eof $fd]} {
 575                 close $fd
 576                 set current_fd {}
 577                 set status {Annotation complete.}
 578                 destroy $w.status.c
 579         } else {
 580                 _status $this
 581         }
 582 } ifdeleted { catch {close $fd} }
 583
 584 method _status {} {
 585         set have  $blame_lines
 586         set total $total_lines
 587         set pdone 0
 588         if {$total} {set pdone [expr {100 * $have / $total}]}
 589
 590         set status [format \
 591                 "Loading annotations... %i of %i lines annotated (%2i%%)" \
 592                 $have $total $pdone]
 593         $w.status.c coords bar 0 0 $pdone 20
 594 }
 595
 596 method _click {cur_w pos} {
 597         set lno [lindex [split [$cur_w index $pos] .] 0]
 598         if {$lno eq {}} return
 599         _showcommit $this $lno
 600 }
 601
 602 method _load_commit {pos} {
 603         set lno [lindex [split [$w_amov index $pos] .] 0]
 604         set dat [lindex $amov_data $lno]
 605         if {$dat ne {}} {
 606                 set commit [lindex $dat 0]
 607                 set path   [lindex $dat 1]
 608                 _load $this
 609         }
 610 }
 611
 612 method _showcommit {lno} {
 613         global repo_config
 614
 615         if {$highlight_commit ne {}} {
 616                 foreach i $w_columns {
 617                         $i tag conf g$highlight_commit -background $old_bgcolor
 618                 }
 619         }
 620
 621         $w_cviewer conf -state normal
 622         $w_cviewer delete 0.0 end
 623
 624         set dat [lindex $amov_data $lno]
 625         if {$dat eq {}} {
 626                 set cmit {}
 627                 $w_cviewer insert end "Loading annotation..."
 628         } else {
 629                 set cmit [lindex $dat 0]
 630                 set file [lindex $dat 1]
 631
 632                 set old_bgcolor [$w_file tag cget g$cmit -background]
 633                 foreach i $w_columns {
 634                         $i tag conf g$cmit -background $active_color
 635                 }
 636
 637                 set author_name {}
 638                 set author_email {}
 639                 set author_time {}
 640                 catch {set author_name $header($cmit,author)}
 641                 catch {set author_email $header($cmit,author-mail)}
 642                 catch {set author_time [clock format \
 643                         $header($cmit,author-time) \
 644                         -format {%Y-%m-%d %H:%M:%S}
 645                 ]}
 646
 647                 set committer_name {}
 648                 set committer_email {}
 649                 set committer_time {}
 650                 catch {set committer_name $header($cmit,committer)}
 651                 catch {set committer_email $header($cmit,committer-mail)}
 652                 catch {set committer_time [clock format \
 653                         $header($cmit,committer-time) \
 654                         -format {%Y-%m-%d %H:%M:%S}
 655                 ]}
 656
 657                 if {[catch {set msg $header($cmit,message)}]} {
 658                         set msg {}
 659                         catch {
 660                                 set fd [open "| git cat-file commit $cmit" r]
 661                                 fconfigure $fd -encoding binary -translation lf
 662                                 if {[catch {set enc $repo_config(i18n.commitencoding)}]} {
 663                                         set enc utf-8
 664                                 }
 665                                 while {[gets $fd line] > 0} {
 666                                         if {[string match {encoding *} $line]} {
 667                                                 set enc [string tolower [string range $line 9 end]]
 668                                         }
 669                                 }
 670                                 set msg [encoding convertfrom $enc [read $fd]]
 671                                 set msg [string trim $msg]
 672                                 close $fd
 673
 674                                 set author_name [encoding convertfrom $enc $author_name]
 675                                 set committer_name [encoding convertfrom $enc $committer_name]
 676
 677                                 set header($cmit,author) $author_name
 678                                 set header($cmit,committer) $committer_name
 679                         }
 680                         set header($cmit,message) $msg
 681                 }
 682
 683                 $w_cviewer insert end "commit $cmit\n" header_key
 684                 $w_cviewer insert end "Author:\t" header_key
 685                 $w_cviewer insert end "$author_name $author_email" header_val
 686                 $w_cviewer insert end "  $author_time\n" header_val
 687
 688                 $w_cviewer insert end "Committer:\t" header_key
 689                 $w_cviewer insert end "$committer_name $committer_email" header_val
 690                 $w_cviewer insert end "  $committer_time\n" header_val
 691
 692                 if {$file ne $path} {
 693                         $w_cviewer insert end "Original File:\t" header_key
 694                         $w_cviewer insert end "[escape_path $file]\n" header_val
 695                 }
 696
 697                 $w_cviewer insert end "\n$msg"
 698         }
 699         $w_cviewer conf -state disabled
 700
 701         set highlight_line $lno
 702         set highlight_commit $cmit
 703
 704         if {$highlight_commit eq $tooltip_commit} {
 705                 _hide_tooltip $this
 706         }
 707 }
 708
 709 method _copycommit {} {
 710         set pos @$::cursorX,$::cursorY
 711         set lno [lindex [split [$::cursorW index $pos] .] 0]
 712         set dat [lindex $amov_data $lno]
 713         if {$dat ne {}} {
 714                 clipboard clear
 715                 clipboard append \
 716                         -format STRING \
 717                         -type STRING \
 718                         -- [lindex $dat 0]
 719         }
 720 }
 721
 722 method _show_tooltip {cur_w pos} {
 723         set lno [lindex [split [$cur_w index $pos] .] 0]
 724         set dat [lindex $amov_data $lno]
 725         if {$dat eq {}} {
 726                 _hide_tooltip $this
 727                 return
 728         }
 729         set cmit [lindex $dat 0]
 730
 731         if {$cmit eq $highlight_commit} {
 732                 _hide_tooltip $this
 733                 return
 734         }
 735
 736         if {$cmit eq $tooltip_commit} {
 737                 _position_tooltip $this
 738         } elseif {$tooltip_wm ne {}} {
 739                 _open_tooltip $this $cur_w
 740         } elseif {$tooltip_timer eq {}} {
 741                 set tooltip_timer [after 1000 [cb _open_tooltip $cur_w]]
 742         }
 743 }
 744
 745 method _open_tooltip {cur_w} {
 746         set tooltip_timer {}
 747         set pos_x [winfo pointerx $cur_w]
 748         set pos_y [winfo pointery $cur_w]
 749         if {[winfo containing $pos_x $pos_y] ne $cur_w} {
 750                 _hide_tooltip $this
 751                 return
 752         }
 753
 754         set pos @[join [list \
 755                 [expr {$pos_x - [winfo rootx $cur_w]}] \
 756                 [expr {$pos_y - [winfo rooty $cur_w]}]] ,]
 757         set lno [lindex [split [$cur_w index $pos] .] 0]
 758         set dat [lindex $amov_data $lno]
 759         set cmit [lindex $dat 0]
 760         set file [lindex $dat 1]
 761
 762         set author_name {}
 763         set author_email {}
 764         set author_time {}
 765         catch {set author_name $header($cmit,author)}
 766         catch {set author_email $header($cmit,author-mail)}
 767         catch {set author_time [clock format \
 768                 $header($cmit,author-time) \
 769                 -format {%Y-%m-%d %H:%M:%S}
 770         ]}
 771
 772         set committer_name {}
 773         set committer_email {}
 774         set committer_time {}
 775         catch {set committer_name $header($cmit,committer)}
 776         catch {set committer_email $header($cmit,committer-mail)}
 777         catch {set committer_time [clock format \
 778                 $header($cmit,committer-time) \
 779                 -format {%Y-%m-%d %H:%M:%S}
 780         ]}
 781
 782         set summary {}
 783         catch {set summary $header($cmit,summary)}
 784
 785         set tooltip_commit $cmit
 786         set tooltip_text "commit $cmit
 787 $author_name $author_email  $author_time
 788 $summary"
 789
 790         if {$file ne $path} {
 791                 append tooltip_text "
 792
 793 Original File: $file"
 794         }
 795
 796         if {$tooltip_wm ne "$cur_w.tooltip"} {
 797                 _hide_tooltip $this
 798
 799                 set tooltip_wm [toplevel $cur_w.tooltip -borderwidth 1]
 800                 wm overrideredirect $tooltip_wm 1
 801                 wm transient $tooltip_wm [winfo toplevel $cur_w]
 802                 pack [label $tooltip_wm.label \
 803                         -background lightyellow \
 804                         -foreground black \
 805                         -textvariable @tooltip_text \
 806                         -justify left]
 807         }
 808         _position_tooltip $this
 809 }
 810
 811 method _position_tooltip {} {
 812         set req_w [winfo reqwidth  $tooltip_wm.label]
 813         set req_h [winfo reqheight $tooltip_wm.label]
 814         set pos_x [expr {[winfo pointerx .] +  5}]
 815         set pos_y [expr {[winfo pointery .] + 10}]
 816
 817         set g "${req_w}x${req_h}"
 818         if {$pos_x >= 0} {append g +}
 819         append g $pos_x
 820         if {$pos_y >= 0} {append g +}
 821         append g $pos_y
 822
 823         wm geometry $tooltip_wm $g
 824         raise $tooltip_wm
 825 }
 826
 827 method _hide_tooltip {} {
 828         if {$tooltip_wm ne {}} {
 829                 destroy $tooltip_wm
 830                 set tooltip_wm {}
 831                 set tooltip_commit {}
 832         }
 833         if {$tooltip_timer ne {}} {
 834                 after cancel $tooltip_timer
 835                 set tooltip_timer {}
 836         }
 837 }
 838
 839 method _resize {new_height} {
 840         set diff [expr {$new_height - $old_height}]
 841         if {$diff == 0} return
 842
 843         set my [expr {[winfo height $w.file_pane] - 25}]
 844         set o [$w.file_pane sash coord 0]
 845         set ox [lindex $o 0]
 846         set oy [expr {[lindex $o 1] + $diff}]
 847         if {$oy < 0}   {set oy 0}
 848         if {$oy > $my} {set oy $my}
 849         $w.file_pane sash place 0 $ox $oy
 850
 851         set old_height $new_height
 852 }
 853
 854 }