bc81e29b4399a1fcb7d651d247528162229b4eda
   1# git-gui blame viewer
   2# Copyright (C) 2006, 2007 Shawn Pearce
   3
   4class blame {
   5
   6image create photo ::blame::img_back_arrow -data {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}
   7
   8# Persistant data (survives loads)
   9#
  10field history {}; # viewer history: {commit path}
  11field header    ; # array commit,key -> header field
  12
  13# Tk UI control paths
  14#
  15field w          ; # top window in this viewer
  16field w_back     ; # our back button
  17field w_path     ; # label showing the current file path
  18field w_columns  ; # list of all column widgets in the viewer
  19field w_line     ; # text column: all line numbers
  20field w_amov     ; # text column: annotations + move tracking
  21field w_asim     ; # text column: annotations (simple computation)
  22field w_file     ; # text column: actual file data
  23field w_cviewer  ; # pane showing commit message
  24field finder     ; # find mini-dialog frame
  25field gotoline   ; # line goto mini-dialog frame
  26field status     ; # status mega-widget instance
  27field old_height ; # last known height of $w.file_pane
  28
  29
  30# Tk UI colors
  31#
  32variable active_color #c0edc5
  33variable group_colors {
  34        #d6d6d6
  35        #e1e1e1
  36        #ececec
  37}
  38
  39# Current blame data; cleared/reset on each load
  40#
  41field commit               ; # input commit to blame
  42field path                 ; # input filename to view in $commit
  43
  44field current_fd        {} ; # background process running
  45field highlight_line    -1 ; # current line selected
  46field highlight_column  {} ; # current commit column selected
  47field highlight_commit  {} ; # sha1 of commit selected
  48
  49field total_lines       0  ; # total length of file
  50field blame_lines       0  ; # number of lines computed
  51field amov_data            ; # list of {commit origfile origline}
  52field asim_data            ; # list of {commit origfile origline}
  53
  54field r_commit             ; # commit currently being parsed
  55field r_orig_line          ; # original line number
  56field r_final_line         ; # final line number
  57field r_line_count         ; # lines in this region
  58
  59field tooltip_wm        {} ; # Current tooltip toplevel, if open
  60field tooltip_t         {} ; # Text widget in $tooltip_wm
  61field tooltip_timer     {} ; # Current timer event for our tooltip
  62field tooltip_commit    {} ; # Commit(s) in tooltip
  63
  64constructor new {i_commit i_path i_jump} {
  65        global cursor_ptr M1B M1T have_tk85 use_ttk NS
  66        variable active_color
  67        variable group_colors
  68
  69        set commit $i_commit
  70        set path   $i_path
  71
  72        make_toplevel top w
  73        wm title $top [append "[appname] ([reponame]): " [mc "File Viewer"]]
  74
  75        set font_w [font measure font_diff "0"]
  76
  77        gold_frame $w.header
  78        tlabel $w.header.commit_l \
  79                -text [mc "Commit:"] \
  80                -background gold \
  81                -foreground black \
  82                -anchor w \
  83                -justify left
  84        set w_back $w.header.commit_b
  85        tlabel $w_back \
  86                -image ::blame::img_back_arrow \
  87                -borderwidth 0 \
  88                -relief flat \
  89                -state disabled \
  90                -background gold \
  91                -foreground black \
  92                -activebackground gold
  93        bind $w_back <Button-1> "
  94                if {\[$w_back cget -state\] eq {normal}} {
  95                        [cb _history_menu]
  96                }
  97                "
  98        tlabel $w.header.commit \
  99                -textvariable @commit \
 100                -background gold \
 101                -foreground black \
 102                -anchor w \
 103                -justify left
 104        tlabel $w.header.path_l \
 105                -text [mc "File:"] \
 106                -background gold \
 107                -foreground black \
 108                -anchor w \
 109                -justify left
 110        set w_path $w.header.path
 111        tlabel $w_path \
 112                -background gold \
 113                -foreground black \
 114                -anchor w \
 115                -justify left
 116        pack $w.header.commit_l -side left
 117        pack $w_back -side left
 118        pack $w.header.commit -side left
 119        pack $w_path -fill x -side right
 120        pack $w.header.path_l -side right
 121
 122        panedwindow $w.file_pane -orient vertical -borderwidth 0 -sashwidth 3
 123        frame $w.file_pane.out -relief flat -borderwidth 1
 124        frame $w.file_pane.cm -relief sunken -borderwidth 1
 125        $w.file_pane add $w.file_pane.out \
 126                -sticky nsew \
 127                -minsize 100 \
 128                -height 100 \
 129                -width 100
 130        $w.file_pane add $w.file_pane.cm \
 131                -sticky nsew \
 132                -minsize 25 \
 133                -height 25 \
 134                -width 100
 135
 136        set w_line $w.file_pane.out.linenumber_t
 137        text $w_line \
 138                -takefocus 0 \
 139                -highlightthickness 0 \
 140                -padx 0 -pady 0 \
 141                -background white \
 142                -foreground black \
 143                -borderwidth 0 \
 144                -state disabled \
 145                -wrap none \
 146                -height 40 \
 147                -width 6 \
 148                -font font_diff
 149        $w_line tag conf linenumber -justify right -rmargin 5
 150
 151        set w_amov $w.file_pane.out.amove_t
 152        text $w_amov \
 153                -takefocus 0 \
 154                -highlightthickness 0 \
 155                -padx 0 -pady 0 \
 156                -background white \
 157                -foreground black \
 158                -borderwidth 0 \
 159                -state disabled \
 160                -wrap none \
 161                -height 40 \
 162                -width 5 \
 163                -font font_diff
 164        $w_amov tag conf author_abbr -justify right -rmargin 5
 165        $w_amov tag conf curr_commit
 166        $w_amov tag conf prior_commit -foreground blue -underline 1
 167        $w_amov tag bind prior_commit \
 168                <Button-1> \
 169                "[cb _load_commit $w_amov @amov_data @%x,%y];break"
 170
 171        set w_asim $w.file_pane.out.asimple_t
 172        text $w_asim \
 173                -takefocus 0 \
 174                -highlightthickness 0 \
 175                -padx 0 -pady 0 \
 176                -background white \
 177                -foreground black \
 178                -borderwidth 0 \
 179                -state disabled \
 180                -wrap none \
 181                -height 40 \
 182                -width 4 \
 183                -font font_diff
 184        $w_asim tag conf author_abbr -justify right
 185        $w_asim tag conf curr_commit
 186        $w_asim tag conf prior_commit -foreground blue -underline 1
 187        $w_asim tag bind prior_commit \
 188                <Button-1> \
 189                "[cb _load_commit $w_asim @asim_data @%x,%y];break"
 190
 191        set w_file $w.file_pane.out.file_t
 192        text $w_file \
 193                -takefocus 0 \
 194                -highlightthickness 0 \
 195                -padx 0 -pady 0 \
 196                -background white \
 197                -foreground black \
 198                -borderwidth 0 \
 199                -state disabled \
 200                -wrap none \
 201                -height 40 \
 202                -width 80 \
 203                -xscrollcommand [list $w.file_pane.out.sbx set] \
 204                -font font_diff
 205        if {$have_tk85} {
 206                $w_file configure -inactiveselectbackground darkblue
 207        }
 208        $w_file tag conf found \
 209                -background yellow
 210
 211        set w_columns [list $w_amov $w_asim $w_line $w_file]
 212
 213        ${NS}::scrollbar $w.file_pane.out.sbx \
 214                -orient h \
 215                -command [list $w_file xview]
 216        ${NS}::scrollbar $w.file_pane.out.sby \
 217                -orient v \
 218                -command [list scrollbar2many $w_columns yview]
 219        eval grid $w_columns $w.file_pane.out.sby -sticky nsew
 220        grid conf \
 221                $w.file_pane.out.sbx \
 222                -column [expr {[llength $w_columns] - 1}] \
 223                -sticky we
 224        grid columnconfigure \
 225                $w.file_pane.out \
 226                [expr {[llength $w_columns] - 1}] \
 227                -weight 1
 228        grid rowconfigure $w.file_pane.out 0 -weight 1
 229
 230        set finder [::searchbar::new \
 231                $w.file_pane.out.ff $w_file \
 232                -column [expr {[llength $w_columns] - 1}] \
 233                ]
 234
 235        set gotoline [::linebar::new \
 236                $w.file_pane.out.lf $w_file \
 237                -column [expr {[llength $w_columns] - 1}] \
 238                ]
 239
 240        set w_cviewer $w.file_pane.cm.t
 241        text $w_cviewer \
 242                -background white \
 243                -foreground black \
 244                -borderwidth 0 \
 245                -state disabled \
 246                -wrap none \
 247                -height 10 \
 248                -width 80 \
 249                -xscrollcommand [list $w.file_pane.cm.sbx set] \
 250                -yscrollcommand [list $w.file_pane.cm.sby set] \
 251                -font font_diff
 252        $w_cviewer tag conf still_loading \
 253                -font font_uiitalic \
 254                -justify center
 255        $w_cviewer tag conf header_key \
 256                -tabs {3c} \
 257                -background $active_color \
 258                -font font_uibold
 259        $w_cviewer tag conf header_val \
 260                -background $active_color \
 261                -font font_ui
 262        $w_cviewer tag raise sel
 263        ${NS}::scrollbar $w.file_pane.cm.sbx \
 264                -orient h \
 265                -command [list $w_cviewer xview]
 266        ${NS}::scrollbar $w.file_pane.cm.sby \
 267                -orient v \
 268                -command [list $w_cviewer yview]
 269        pack $w.file_pane.cm.sby -side right -fill y
 270        pack $w.file_pane.cm.sbx -side bottom -fill x
 271        pack $w_cviewer -expand 1 -fill both
 272
 273        set status [::status_bar::new $w.status]
 274
 275        menu $w.ctxm -tearoff 0
 276        $w.ctxm add command \
 277                -label [mc "Copy Commit"] \
 278                -command [cb _copycommit]
 279        $w.ctxm add separator
 280        $w.ctxm add command \
 281                -label [mc "Find Text..."] \
 282                -accelerator F7 \
 283                -command [list searchbar::show $finder]
 284        $w.ctxm add command \
 285                -label [mc "Goto Line..."] \
 286                -accelerator "Ctrl-G" \
 287                -command [list linebar::show $gotoline]
 288        menu $w.ctxm.enc
 289        build_encoding_menu $w.ctxm.enc [cb _setencoding]
 290        $w.ctxm add cascade \
 291                -label [mc "Encoding"] \
 292                -menu $w.ctxm.enc
 293        $w.ctxm add command \
 294                -label [mc "Do Full Copy Detection"] \
 295                -command [cb _fullcopyblame]
 296        $w.ctxm add separator
 297        $w.ctxm add command \
 298                -label [mc "Show History Context"] \
 299                -command [cb _gitkcommit]
 300        $w.ctxm add command \
 301                -label [mc "Blame Parent Commit"] \
 302                -command [cb _blameparent]
 303
 304        foreach i $w_columns {
 305                for {set g 0} {$g < [llength $group_colors]} {incr g} {
 306                        $i tag conf color$g -background [lindex $group_colors $g]
 307                }
 308
 309                if {$i eq $w_file} {
 310                        $w_file tag raise found
 311                }
 312                $i tag raise sel
 313
 314                $i conf -cursor $cursor_ptr
 315                $i conf -yscrollcommand \
 316                        "[list ::searchbar::scrolled $finder]
 317                         [list many2scrollbar $w_columns yview $w.file_pane.out.sby]"
 318                bind $i <Button-1> "
 319                        [cb _hide_tooltip]
 320                        [cb _click $i @%x,%y]
 321                        focus $i
 322                "
 323                bind $i <Any-Motion>  [cb _show_tooltip $i @%x,%y]
 324                bind $i <Any-Enter>   [cb _hide_tooltip]
 325                bind $i <Any-Leave>   [cb _hide_tooltip]
 326                bind_button3 $i "
 327                        [cb _hide_tooltip]
 328                        set cursorX %x
 329                        set cursorY %y
 330                        set cursorW %W
 331                        tk_popup $w.ctxm %X %Y
 332                "
 333                bind $i <Shift-Tab> "[list focus $w_cviewer];break"
 334                bind $i <Tab>       "[cb _focus_search $w_cviewer];break"
 335        }
 336
 337        foreach i [concat $w_columns $w_cviewer] {
 338                bind $i <Key-Up>        {catch {%W yview scroll -1 units};break}
 339                bind $i <Key-Down>      {catch {%W yview scroll  1 units};break}
 340                bind $i <Key-Left>      {catch {%W xview scroll -1 units};break}
 341                bind $i <Key-Right>     {catch {%W xview scroll  1 units};break}
 342                bind $i <Key-k>         {catch {%W yview scroll -1 units};break}
 343                bind $i <Key-j>         {catch {%W yview scroll  1 units};break}
 344                bind $i <Key-h>         {catch {%W xview scroll -1 units};break}
 345                bind $i <Key-l>         {catch {%W xview scroll  1 units};break}
 346                bind $i <Control-Key-b> {catch {%W yview scroll -1 pages};break}
 347                bind $i <Control-Key-f> {catch {%W yview scroll  1 pages};break}
 348        }
 349
 350        bind $w_cviewer <Shift-Tab> "[cb _focus_search $w_file];break"
 351        bind $w_cviewer <Tab>       "[list focus $w_file];break"
 352        bind $w_cviewer <Button-1>   [list focus $w_cviewer]
 353        bind $w_file    <Visibility> [cb _focus_search $w_file]
 354        bind $top       <F7>         [list searchbar::show $finder]
 355        bind $top       <Key-slash>  [list searchbar::show $finder]
 356        bind $top    <Control-Key-s> [list searchbar::show $finder]
 357        bind $top       <Escape>     [list searchbar::hide $finder]
 358        bind $top       <F3>         [list searchbar::find_next $finder]
 359        bind $top       <Key-n>      [list searchbar::find_next $finder]
 360        bind $top       <Shift-F3>   [list searchbar::find_prev $finder]
 361        bind $top    <Shift-Key-n>   [list searchbar::find_prev $finder]
 362        bind $top    <Control-Key-g> [list linebar::show $gotoline]
 363        catch { bind $top <Shift-Key-XF86_Switch_VT_3> [list searchbar::find_prev $finder] }
 364
 365        grid configure $w.header -sticky ew
 366        grid configure $w.file_pane -sticky nsew
 367        grid configure $w.status -sticky ew
 368        grid columnconfigure $top 0 -weight 1
 369        grid rowconfigure $top 0 -weight 0
 370        grid rowconfigure $top 1 -weight 1
 371        grid rowconfigure $top 2 -weight 0
 372
 373        set req_w [winfo reqwidth  $top]
 374        set req_h [winfo reqheight $top]
 375        set scr_w [expr {[winfo screenwidth $top] - 40}]
 376        set scr_h [expr {[winfo screenheight $top] - 120}]
 377        set opt_w [expr {$font_w * (80 + 5*3 + 3)}]
 378        if {$req_w < $opt_w} {set req_w $opt_w}
 379        if {$req_w > $scr_w} {set req_w $scr_w}
 380        set opt_h [expr {$req_w*4/3}]
 381        if {$req_h < $scr_h} {set req_h $scr_h}
 382        if {$req_h > $opt_h} {set req_h $opt_h}
 383        set g "${req_w}x${req_h}"
 384        wm geometry $top $g
 385        update
 386
 387        set old_height [winfo height $w.file_pane]
 388        $w.file_pane sash place 0 \
 389                [lindex [$w.file_pane sash coord 0] 0] \
 390                [expr {int($old_height * 0.80)}]
 391        bind $w.file_pane <Configure> \
 392        "if {{$w.file_pane} eq {%W}} {[cb _resize %h]}"
 393
 394        wm protocol $top WM_DELETE_WINDOW "destroy $top"
 395        bind $top <Destroy> [cb _handle_destroy %W]
 396
 397        _load $this $i_jump
 398}
 399
 400method _focus_search {win} {
 401        if {[searchbar::visible $finder]} {
 402                focus [searchbar::editor $finder]
 403        } else {
 404                focus $win
 405        }
 406}
 407
 408method _handle_destroy {win} {
 409        if {$win eq $w} {
 410                _kill $this
 411                delete_this
 412        }
 413}
 414
 415method _kill {} {
 416        if {$current_fd ne {}} {
 417                kill_file_process $current_fd
 418                catch {close $current_fd}
 419                set current_fd {}
 420        }
 421}
 422
 423method _load {jump} {
 424        variable group_colors
 425
 426        _hide_tooltip $this
 427
 428        if {$total_lines != 0 || $current_fd ne {}} {
 429                _kill $this
 430
 431                foreach i $w_columns {
 432                        $i conf -state normal
 433                        $i delete 0.0 end
 434                        foreach g [$i tag names] {
 435                                if {[regexp {^g[0-9a-f]{40}$} $g]} {
 436                                        $i tag delete $g
 437                                }
 438                        }
 439                        $i conf -state disabled
 440                }
 441
 442                $w_cviewer conf -state normal
 443                $w_cviewer delete 0.0 end
 444                $w_cviewer conf -state disabled
 445
 446                set highlight_line -1
 447                set highlight_column {}
 448                set highlight_commit {}
 449                set total_lines 0
 450        }
 451
 452        if {$history eq {}} {
 453                $w_back conf -state disabled
 454        } else {
 455                $w_back conf -state normal
 456        }
 457
 458        # Index 0 is always empty.  There is never line 0 as
 459        # we use only 1 based lines, as that matches both with
 460        # git-blame output and with Tk's text widget.
 461        #
 462        set amov_data [list [list]]
 463        set asim_data [list [list]]
 464
 465        $status show [mc "Reading %s..." "$commit:[escape_path $path]"]
 466        $w_path conf -text [escape_path $path]
 467
 468        set do_textconv 0
 469        if {![is_config_false gui.textconv] && [git-version >= 1.7.2]} {
 470                set filter [gitattr $path diff set]
 471                set textconv [get_config [join [list diff $filter textconv] .]]
 472                if {$filter ne {set} && $textconv ne {}} {
 473                        set do_textconv 1
 474                }
 475        }
 476        if {$commit eq {}} {
 477                if {$do_textconv ne 0} {
 478                        # Run textconv with sh -c "..." to allow it to
 479                        # contain command + arguments. On windows, just
 480                        # call the filter command.
 481                        if {![file executable [shellpath]]} {
 482                                set fd [open |[linsert $textconv end $path] r]
 483                        } else {
 484                                set fd [open |[list [shellpath] -c "$textconv \"\$0\"" $path] r]
 485                        }
 486                } else {
 487                        set fd [open $path r]
 488                }
 489                fconfigure $fd -eofchar {}
 490        } else {
 491                if {$do_textconv ne 0} {
 492                        set fd [git_read cat-file --textconv "$commit:$path"]
 493                } else {
 494                        set fd [git_read cat-file blob "$commit:$path"]
 495                }
 496        }
 497        fconfigure $fd \
 498                -blocking 0 \
 499                -translation lf \
 500                -encoding [get_path_encoding $path]
 501        fileevent $fd readable [cb _read_file $fd $jump]
 502        set current_fd $fd
 503}
 504
 505method _history_menu {} {
 506        set m $w.backmenu
 507        if {[winfo exists $m]} {
 508                $m delete 0 end
 509        } else {
 510                menu $m -tearoff 0
 511        }
 512
 513        for {set i [expr {[llength $history] - 1}]
 514                } {$i >= 0} {incr i -1} {
 515                set e [lindex $history $i]
 516                set c [lindex $e 0]
 517                set f [lindex $e 1]
 518
 519                if {[regexp {^[0-9a-f]{40}$} $c]} {
 520                        set t [string range $c 0 8]...
 521                } elseif {$c eq {}} {
 522                        set t {Working Directory}
 523                } else {
 524                        set t $c
 525                }
 526                if {![catch {set summary $header($c,summary)}]} {
 527                        append t " $summary"
 528                        if {[string length $t] > 70} {
 529                                set t [string range $t 0 66]...
 530                        }
 531                }
 532
 533                $m add command -label $t -command [cb _goback $i]
 534        }
 535        set X [winfo rootx $w_back]
 536        set Y [expr {[winfo rooty $w_back] + [winfo height $w_back]}]
 537        tk_popup $m $X $Y
 538}
 539
 540method _goback {i} {
 541        set dat [lindex $history $i]
 542        set history [lrange $history 0 [expr {$i - 1}]]
 543        set commit [lindex $dat 0]
 544        set path [lindex $dat 1]
 545        _load $this [lrange $dat 2 5]
 546}
 547
 548method _read_file {fd jump} {
 549        if {$fd ne $current_fd} {
 550                catch {close $fd}
 551                return
 552        }
 553
 554        foreach i $w_columns {$i conf -state normal}
 555        while {[gets $fd line] >= 0} {
 556                regsub "\r\$" $line {} line
 557                incr total_lines
 558                lappend amov_data {}
 559                lappend asim_data {}
 560
 561                if {$total_lines > 1} {
 562                        foreach i $w_columns {$i insert end "\n"}
 563                }
 564
 565                $w_line insert end "$total_lines" linenumber
 566                $w_file insert end "$line"
 567        }
 568
 569        set ln_wc [expr {[string length $total_lines] + 2}]
 570        if {[$w_line cget -width] < $ln_wc} {
 571                $w_line conf -width $ln_wc
 572        }
 573
 574        foreach i $w_columns {$i conf -state disabled}
 575
 576        if {[eof $fd]} {
 577                close $fd
 578
 579                # If we don't force Tk to update the widgets *right now*
 580                # none of our jump commands will cause a change in the UI.
 581                #
 582                update
 583
 584                if {[llength $jump] == 1} {
 585                        set highlight_line [lindex $jump 0]
 586                        $w_file see "$highlight_line.0"
 587                } elseif {[llength $jump] == 4} {
 588                        set highlight_column [lindex $jump 0]
 589                        set highlight_line [lindex $jump 1]
 590                        $w_file xview moveto [lindex $jump 2]
 591                        $w_file yview moveto [lindex $jump 3]
 592                }
 593
 594                _exec_blame $this $w_asim @asim_data \
 595                        [list] \
 596                        [mc "Loading copy/move tracking annotations..."]
 597        }
 598} ifdeleted { catch {close $fd} }
 599
 600method _exec_blame {cur_w cur_d options cur_s} {
 601        lappend options --incremental --encoding=utf-8
 602        if {$commit eq {}} {
 603                lappend options --contents $path
 604        } else {
 605                lappend options $commit
 606        }
 607        lappend options -- $path
 608        set fd [eval git_read --nice blame $options]
 609        fconfigure $fd -blocking 0 -translation lf -encoding utf-8
 610        fileevent $fd readable [cb _read_blame $fd $cur_w $cur_d]
 611        set current_fd $fd
 612        set blame_lines 0
 613
 614        $status start \
 615                $cur_s \
 616                [mc "lines annotated"]
 617}
 618
 619method _read_blame {fd cur_w cur_d} {
 620        upvar #0 $cur_d line_data
 621        variable group_colors
 622
 623        if {$fd ne $current_fd} {
 624                catch {close $fd}
 625                return
 626        }
 627
 628        $cur_w conf -state normal
 629        while {[gets $fd line] >= 0} {
 630                if {[regexp {^([a-z0-9]{40}) (\d+) (\d+) (\d+)$} $line line \
 631                        cmit original_line final_line line_count]} {
 632                        set r_commit     $cmit
 633                        set r_orig_line  $original_line
 634                        set r_final_line $final_line
 635                        set r_line_count $line_count
 636                } elseif {[string match {filename *} $line]} {
 637                        set file [string range $line 9 end]
 638                        set n    $r_line_count
 639                        set lno  $r_final_line
 640                        set oln  $r_orig_line
 641                        set cmit $r_commit
 642
 643                        if {[regexp {^0{40}$} $cmit]} {
 644                                set commit_abbr work
 645                                set commit_type curr_commit
 646                        } elseif {$cmit eq $commit} {
 647                                set commit_abbr this
 648                                set commit_type curr_commit
 649                        } else {
 650                                set commit_type prior_commit
 651                                set commit_abbr [string range $cmit 0 3]
 652                        }
 653
 654                        set author_abbr {}
 655                        set a_name {}
 656                        catch {set a_name $header($cmit,author)}
 657                        while {$a_name ne {}} {
 658                                if {$author_abbr ne {}
 659                                        && [string index $a_name 0] eq {'}} {
 660                                        regsub {^'[^']+'\s+} $a_name {} a_name
 661                                }
 662                                if {![regexp {^([[:upper:]])} $a_name _a]} break
 663                                append author_abbr $_a
 664                                unset _a
 665                                if {![regsub \
 666                                        {^[[:upper:]][^\s]*\s+} \
 667                                        $a_name {} a_name ]} break
 668                        }
 669                        if {$author_abbr eq {}} {
 670                                set author_abbr { |}
 671                        } else {
 672                                set author_abbr [string range $author_abbr 0 3]
 673                        }
 674                        unset a_name
 675
 676                        set first_lno $lno
 677                        while {
 678                           $first_lno > 1
 679                        && $cmit eq [lindex $line_data [expr {$first_lno - 1}] 0]
 680                        && $file eq [lindex $line_data [expr {$first_lno - 1}] 1]
 681                        } {
 682                                incr first_lno -1
 683                        }
 684
 685                        set color {}
 686                        if {$first_lno < $lno} {
 687                                foreach g [$w_file tag names $first_lno.0] {
 688                                        if {[regexp {^color[0-9]+$} $g]} {
 689                                                set color $g
 690                                                break
 691                                        }
 692                                }
 693                        } else {
 694                                set i [lsort [concat \
 695                                        [$w_file tag names "[expr {$first_lno - 1}].0"] \
 696                                        [$w_file tag names "[expr {$lno + $n}].0"] \
 697                                        ]]
 698                                for {set g 0} {$g < [llength $group_colors]} {incr g} {
 699                                        if {[lsearch -sorted -exact $i color$g] == -1} {
 700                                                set color color$g
 701                                                break
 702                                        }
 703                                }
 704                        }
 705                        if {$color eq {}} {
 706                                set color color0
 707                        }
 708
 709                        while {$n > 0} {
 710                                set lno_e "$lno.0 lineend + 1c"
 711                                if {[lindex $line_data $lno] ne {}} {
 712                                        set g [lindex $line_data $lno 0]
 713                                        foreach i $w_columns {
 714                                                $i tag remove g$g $lno.0 $lno_e
 715                                        }
 716                                }
 717                                lset line_data $lno [list $cmit $file $oln]
 718
 719                                $cur_w delete $lno.0 "$lno.0 lineend"
 720                                if {$lno == $first_lno} {
 721                                        $cur_w insert $lno.0 $commit_abbr $commit_type
 722                                } elseif {$lno == [expr {$first_lno + 1}]} {
 723                                        $cur_w insert $lno.0 $author_abbr author_abbr
 724                                } else {
 725                                        $cur_w insert $lno.0 { |}
 726                                }
 727
 728                                foreach i $w_columns {
 729                                        if {$cur_w eq $w_amov} {
 730                                                for {set g 0} \
 731                                                        {$g < [llength $group_colors]} \
 732                                                        {incr g} {
 733                                                        $i tag remove color$g $lno.0 $lno_e
 734                                                }
 735                                                $i tag add $color $lno.0 $lno_e
 736                                        }
 737                                        $i tag add g$cmit $lno.0 $lno_e
 738                                }
 739
 740                                if {$highlight_column eq $cur_w} {
 741                                        if {$highlight_line == -1
 742                                         && [lindex [$w_file yview] 0] == 0} {
 743                                                $w_file see $lno.0
 744                                                set highlight_line $lno
 745                                        }
 746                                        if {$highlight_line == $lno} {
 747                                                _showcommit $this $cur_w $lno
 748                                        }
 749                                }
 750
 751                                incr n -1
 752                                incr lno
 753                                incr oln
 754                                incr blame_lines
 755                        }
 756
 757                        while {
 758                           $cmit eq [lindex $line_data $lno 0]
 759                        && $file eq [lindex $line_data $lno 1]
 760                        } {
 761                                $cur_w delete $lno.0 "$lno.0 lineend"
 762
 763                                if {$lno == $first_lno} {
 764                                        $cur_w insert $lno.0 $commit_abbr $commit_type
 765                                } elseif {$lno == [expr {$first_lno + 1}]} {
 766                                        $cur_w insert $lno.0 $author_abbr author_abbr
 767                                } else {
 768                                        $cur_w insert $lno.0 { |}
 769                                }
 770
 771                                if {$cur_w eq $w_amov} {
 772                                        foreach i $w_columns {
 773                                                for {set g 0} \
 774                                                        {$g < [llength $group_colors]} \
 775                                                        {incr g} {
 776                                                        $i tag remove color$g $lno.0 $lno_e
 777                                                }
 778                                                $i tag add $color $lno.0 $lno_e
 779                                        }
 780                                }
 781
 782                                incr lno
 783                        }
 784
 785                } elseif {[regexp {^([a-z-]+) (.*)$} $line line key data]} {
 786                        set header($r_commit,$key) $data
 787                }
 788        }
 789        $cur_w conf -state disabled
 790
 791        if {[eof $fd]} {
 792                close $fd
 793                if {$cur_w eq $w_asim} {
 794                        # Switches for original location detection
 795                        set threshold [get_config gui.copyblamethreshold]
 796                        set original_options [list "-C$threshold"]
 797
 798                        if {![is_config_true gui.fastcopyblame]} {
 799                                # thorough copy search; insert before the threshold
 800                                set original_options [linsert $original_options 0 -C]
 801                        }
 802                        if {[git-version >= 1.5.3]} {
 803                                lappend original_options -w ; # ignore indentation changes
 804                        }
 805
 806                        _exec_blame $this $w_amov @amov_data \
 807                                $original_options \
 808                                [mc "Loading original location annotations..."]
 809                } else {
 810                        set current_fd {}
 811                        $status stop [mc "Annotation complete."]
 812                }
 813        } else {
 814                $status update $blame_lines $total_lines
 815        }
 816} ifdeleted { catch {close $fd} }
 817
 818method _find_commit_bound {data_list start_idx delta} {
 819        upvar #0 $data_list line_data
 820        set pos $start_idx
 821        set limit       [expr {[llength $line_data] - 1}]
 822        set base_commit [lindex $line_data $pos 0]
 823
 824        while {$pos > 0 && $pos < $limit} {
 825                set new_pos [expr {$pos + $delta}]
 826                if {[lindex $line_data $new_pos 0] ne $base_commit} {
 827                        return $pos
 828                }
 829
 830                set pos $new_pos
 831        }
 832
 833        return $pos
 834}
 835
 836method _fullcopyblame {} {
 837        if {$current_fd ne {}} {
 838                tk_messageBox \
 839                        -icon error \
 840                        -type ok \
 841                        -title [mc "Busy"] \
 842                        -message [mc "Annotation process is already running."]
 843
 844                return
 845        }
 846
 847        # Switches for original location detection
 848        set threshold [get_config gui.copyblamethreshold]
 849        set original_options [list -C -C "-C$threshold"]
 850
 851        if {[git-version >= 1.5.3]} {
 852                lappend original_options -w ; # ignore indentation changes
 853        }
 854
 855        # Find the line range
 856        set pos @$::cursorX,$::cursorY
 857        set lno [lindex [split [$::cursorW index $pos] .] 0]
 858        set min_amov_lno [_find_commit_bound $this @amov_data $lno -1]
 859        set max_amov_lno [_find_commit_bound $this @amov_data $lno 1]
 860        set min_asim_lno [_find_commit_bound $this @asim_data $lno -1]
 861        set max_asim_lno [_find_commit_bound $this @asim_data $lno 1]
 862
 863        if {$min_asim_lno < $min_amov_lno} {
 864                set min_amov_lno $min_asim_lno
 865        }
 866
 867        if {$max_asim_lno > $max_amov_lno} {
 868                set max_amov_lno $max_asim_lno
 869        }
 870
 871        lappend original_options -L "$min_amov_lno,$max_amov_lno"
 872
 873        # Clear lines
 874        for {set i $min_amov_lno} {$i <= $max_amov_lno} {incr i} {
 875                lset amov_data $i [list ]
 876        }
 877
 878        # Start the back-end process
 879        _exec_blame $this $w_amov @amov_data \
 880                $original_options \
 881                [mc "Running thorough copy detection..."]
 882}
 883
 884method _click {cur_w pos} {
 885        set lno [lindex [split [$cur_w index $pos] .] 0]
 886        _showcommit $this $cur_w $lno
 887}
 888
 889method _setencoding {enc} {
 890        force_path_encoding $path $enc
 891        _load $this [list \
 892                $highlight_column \
 893                $highlight_line \
 894                [lindex [$w_file xview] 0] \
 895                [lindex [$w_file yview] 0] \
 896                ]
 897}
 898
 899method _load_commit {cur_w cur_d pos} {
 900        upvar #0 $cur_d line_data
 901        set lno [lindex [split [$cur_w index $pos] .] 0]
 902        set dat [lindex $line_data $lno]
 903        if {$dat ne {}} {
 904                _load_new_commit $this  \
 905                        [lindex $dat 0] \
 906                        [lindex $dat 1] \
 907                        [list [lindex $dat 2]]
 908        }
 909}
 910
 911method _load_new_commit {new_commit new_path jump} {
 912        lappend history [list \
 913                $commit $path \
 914                $highlight_column \
 915                $highlight_line \
 916                [lindex [$w_file xview] 0] \
 917                [lindex [$w_file yview] 0] \
 918                ]
 919
 920        set commit $new_commit
 921        set path   $new_path
 922        _load $this $jump
 923}
 924
 925method _showcommit {cur_w lno} {
 926        global repo_config
 927        variable active_color
 928
 929        if {$highlight_commit ne {}} {
 930                foreach i $w_columns {
 931                        $i tag conf g$highlight_commit -background {}
 932                        $i tag lower g$highlight_commit
 933                }
 934        }
 935
 936        if {$cur_w eq $w_asim} {
 937                set dat [lindex $asim_data $lno]
 938                set highlight_column $w_asim
 939        } else {
 940                set dat [lindex $amov_data $lno]
 941                set highlight_column $w_amov
 942        }
 943
 944        $w_cviewer conf -state normal
 945        $w_cviewer delete 0.0 end
 946
 947        if {$dat eq {}} {
 948                set cmit {}
 949                $w_cviewer insert end [mc "Loading annotation..."] still_loading
 950        } else {
 951                set cmit [lindex $dat 0]
 952                set file [lindex $dat 1]
 953
 954                foreach i $w_columns {
 955                        $i tag conf g$cmit -background $active_color
 956                        $i tag raise g$cmit
 957                        if {$i eq $w_file} {
 958                                $w_file tag raise found
 959                        }
 960                        $i tag raise sel
 961                }
 962
 963                set author_name {}
 964                set author_email {}
 965                set author_time {}
 966                catch {set author_name $header($cmit,author)}
 967                catch {set author_email $header($cmit,author-mail)}
 968                catch {set author_time [format_date $header($cmit,author-time)]}
 969
 970                set committer_name {}
 971                set committer_email {}
 972                set committer_time {}
 973                catch {set committer_name $header($cmit,committer)}
 974                catch {set committer_email $header($cmit,committer-mail)}
 975                catch {set committer_time [format_date $header($cmit,committer-time)]}
 976
 977                if {[catch {set msg $header($cmit,message)}]} {
 978                        set msg {}
 979                        catch {
 980                                set fd [git_read cat-file commit $cmit]
 981                                fconfigure $fd -encoding binary -translation lf
 982                                # By default commits are assumed to be in utf-8
 983                                set enc utf-8
 984                                while {[gets $fd line] > 0} {
 985                                        if {[string match {encoding *} $line]} {
 986                                                set enc [string tolower [string range $line 9 end]]
 987                                        }
 988                                }
 989                                set msg [read $fd]
 990                                close $fd
 991
 992                                set enc [tcl_encoding $enc]
 993                                if {$enc ne {}} {
 994                                        set msg [encoding convertfrom $enc $msg]
 995                                }
 996                                set msg [string trim $msg]
 997                        }
 998                        set header($cmit,message) $msg
 999                }
1000
1001                $w_cviewer insert end "commit $cmit\n" header_key
1002                $w_cviewer insert end [strcat [mc "Author:"] "\t"] header_key
1003                $w_cviewer insert end "$author_name $author_email" header_val
1004                $w_cviewer insert end "  $author_time\n" header_val
1005
1006                $w_cviewer insert end [strcat [mc "Committer:"] "\t"] header_key
1007                $w_cviewer insert end "$committer_name $committer_email" header_val
1008                $w_cviewer insert end "  $committer_time\n" header_val
1009
1010                if {$file ne $path} {
1011                        $w_cviewer insert end [strcat [mc "Original File:"] "\t"] header_key
1012                        $w_cviewer insert end "[escape_path $file]\n" header_val
1013                }
1014
1015                $w_cviewer insert end "\n$msg"
1016        }
1017        $w_cviewer conf -state disabled
1018
1019        set highlight_line $lno
1020        set highlight_commit $cmit
1021
1022        if {[lsearch -exact $tooltip_commit $highlight_commit] != -1} {
1023                _hide_tooltip $this
1024        }
1025}
1026
1027method _get_click_amov_info {} {
1028        set pos @$::cursorX,$::cursorY
1029        set lno [lindex [split [$::cursorW index $pos] .] 0]
1030        return [lindex $amov_data $lno]
1031}
1032
1033method _copycommit {} {
1034        set dat [_get_click_amov_info $this]
1035        if {$dat ne {}} {
1036                clipboard clear
1037                clipboard append \
1038                        -format STRING \
1039                        -type STRING \
1040                        -- [lindex $dat 0]
1041        }
1042}
1043
1044method _format_offset_date {base offset} {
1045        set exval [expr {$base + $offset*24*60*60}]
1046        return [clock format $exval -format {%Y-%m-%d}]
1047}
1048
1049method _gitkcommit {} {
1050        global nullid
1051
1052        set dat [_get_click_amov_info $this]
1053        if {$dat ne {}} {
1054                set cmit [lindex $dat 0]
1055
1056                # If the line belongs to the working copy, use HEAD instead
1057                if {$cmit eq $nullid} {
1058                        if {[catch {set cmit [git rev-parse --verify HEAD]} err]} {
1059                                error_popup [strcat [mc "Cannot find HEAD commit:"] "\n\n$err"]
1060                                return;
1061                        }
1062                }
1063
1064                set radius [get_config gui.blamehistoryctx]
1065                set cmdline [list --select-commit=$cmit]
1066
1067                if {$radius > 0} {
1068                        set author_time {}
1069                        set committer_time {}
1070
1071                        catch {set author_time $header($cmit,author-time)}
1072                        catch {set committer_time $header($cmit,committer-time)}
1073
1074                        if {$committer_time eq {}} {
1075                                set committer_time $author_time
1076                        }
1077
1078                        set after_time [_format_offset_date $this $committer_time [expr {-$radius}]]
1079                        set before_time [_format_offset_date $this $committer_time $radius]
1080
1081                        lappend cmdline --after=$after_time --before=$before_time
1082                }
1083
1084                lappend cmdline $cmit
1085
1086                set base_rev "HEAD"
1087                if {$commit ne {}} {
1088                        set base_rev $commit
1089                }
1090
1091                if {$base_rev ne $cmit} {
1092                        lappend cmdline $base_rev
1093                }
1094
1095                do_gitk $cmdline
1096        }
1097}
1098
1099method _blameparent {} {
1100        global nullid
1101
1102        set dat [_get_click_amov_info $this]
1103        if {$dat ne {}} {
1104                set cmit [lindex $dat 0]
1105                set new_path [lindex $dat 1]
1106
1107                # Allow using Blame Parent on lines modified in the working copy
1108                if {$cmit eq $nullid} {
1109                        set parent_ref "HEAD"
1110                } else {
1111                        set parent_ref "$cmit^"
1112                }
1113                if {[catch {set cparent [git rev-parse --verify $parent_ref]} err]} {
1114                        error_popup [strcat [mc "Cannot find parent commit:"] "\n\n$err"]
1115                        return;
1116                }
1117
1118                _kill $this
1119
1120                # Generate a diff between the commit and its parent,
1121                # and use the hunks to update the line number.
1122                # Request zero context to simplify calculations.
1123                if {$cmit eq $nullid} {
1124                        set diffcmd [list diff-index --unified=0 $cparent -- $new_path]
1125                } else {
1126                        set diffcmd [list diff-tree --unified=0 $cparent $cmit -- $new_path]
1127                }
1128                if {[catch {set fd [eval git_read $diffcmd]} err]} {
1129                        $status stop [mc "Unable to display parent"]
1130                        error_popup [strcat [mc "Error loading diff:"] "\n\n$err"]
1131                        return
1132                }
1133
1134                set r_orig_line [lindex $dat 2]
1135
1136                fconfigure $fd \
1137                        -blocking 0 \
1138                        -encoding binary \
1139                        -translation binary
1140                fileevent $fd readable [cb _read_diff_load_commit \
1141                        $fd $cparent $new_path $r_orig_line]
1142                set current_fd $fd
1143        }
1144}
1145
1146method _read_diff_load_commit {fd cparent new_path tline} {
1147        if {$fd ne $current_fd} {
1148                catch {close $fd}
1149                return
1150        }
1151
1152        while {[gets $fd line] >= 0} {
1153                if {[regexp {^@@ -(\d+)(,(\d+))? \+(\d+)(,(\d+))? @@} $line line \
1154                        old_line osz old_size new_line nsz new_size]} {
1155
1156                        if {$osz eq {}} { set old_size 1 }
1157                        if {$nsz eq {}} { set new_size 1 }
1158
1159                        if {$new_line <= $tline} {
1160                                if {[expr {$new_line + $new_size}] > $tline} {
1161                                        # Target line within the hunk
1162                                        set line_shift [expr {
1163                                                ($new_size-$old_size)*($tline-$new_line)/$new_size
1164                                                }]
1165                                } else {
1166                                        set line_shift [expr {$new_size-$old_size}]
1167                                }
1168
1169                                set r_orig_line [expr {$r_orig_line - $line_shift}]
1170                        }
1171                }
1172        }
1173
1174        if {[eof $fd]} {
1175                close $fd;
1176                set current_fd {}
1177
1178                _load_new_commit $this  \
1179                        $cparent        \
1180                        $new_path       \
1181                        [list $r_orig_line]
1182        }
1183} ifdeleted { catch {close $fd} }
1184
1185method _show_tooltip {cur_w pos} {
1186        if {$tooltip_wm ne {}} {
1187                _open_tooltip $this $cur_w
1188        } elseif {$tooltip_timer eq {}} {
1189                set tooltip_timer [after 1000 [cb _open_tooltip $cur_w]]
1190        }
1191}
1192
1193method _open_tooltip {cur_w} {
1194        set tooltip_timer {}
1195        set pos_x [winfo pointerx $cur_w]
1196        set pos_y [winfo pointery $cur_w]
1197        if {[winfo containing $pos_x $pos_y] ne $cur_w} {
1198                _hide_tooltip $this
1199                return
1200        }
1201
1202        if {$tooltip_wm ne "$cur_w.tooltip"} {
1203                _hide_tooltip $this
1204
1205                set tooltip_wm [toplevel $cur_w.tooltip -borderwidth 1]
1206                wm overrideredirect $tooltip_wm 1
1207                wm transient $tooltip_wm [winfo toplevel $cur_w]
1208                set tooltip_t $tooltip_wm.label
1209                text $tooltip_t \
1210                        -takefocus 0 \
1211                        -highlightthickness 0 \
1212                        -relief flat \
1213                        -borderwidth 0 \
1214                        -wrap none \
1215                        -background lightyellow \
1216                        -foreground black
1217                $tooltip_t tag conf section_header -font font_uibold
1218                pack $tooltip_t
1219        } else {
1220                $tooltip_t conf -state normal
1221                $tooltip_t delete 0.0 end
1222        }
1223
1224        set pos @[join [list \
1225                [expr {$pos_x - [winfo rootx $cur_w]}] \
1226                [expr {$pos_y - [winfo rooty $cur_w]}]] ,]
1227        set lno [lindex [split [$cur_w index $pos] .] 0]
1228        if {$cur_w eq $w_amov} {
1229                set dat [lindex $amov_data $lno]
1230                set org {}
1231        } else {
1232                set dat [lindex $asim_data $lno]
1233                set org [lindex $amov_data $lno]
1234        }
1235
1236        if {$dat eq {}} {
1237                _hide_tooltip $this
1238                return
1239        }
1240
1241        set cmit [lindex $dat 0]
1242        set tooltip_commit [list $cmit]
1243
1244        set author_name {}
1245        set summary     {}
1246        set author_time {}
1247        catch {set author_name $header($cmit,author)}
1248        catch {set summary     $header($cmit,summary)}
1249        catch {set author_time [format_date $header($cmit,author-time)]}
1250
1251        $tooltip_t insert end "commit $cmit\n"
1252        $tooltip_t insert end "$author_name  $author_time\n"
1253        $tooltip_t insert end "$summary"
1254
1255        if {$org ne {} && [lindex $org 0] ne $cmit} {
1256                set save [$tooltip_t get 0.0 end]
1257                $tooltip_t delete 0.0 end
1258
1259                set cmit [lindex $org 0]
1260                set file [lindex $org 1]
1261                lappend tooltip_commit $cmit
1262
1263                set author_name {}
1264                set summary     {}
1265                set author_time {}
1266                catch {set author_name $header($cmit,author)}
1267                catch {set summary     $header($cmit,summary)}
1268                catch {set author_time [format_date $header($cmit,author-time)]}
1269
1270                $tooltip_t insert end [strcat [mc "Originally By:"] "\n"] section_header
1271                $tooltip_t insert end "commit $cmit\n"
1272                $tooltip_t insert end "$author_name  $author_time\n"
1273                $tooltip_t insert end "$summary\n"
1274
1275                if {$file ne $path} {
1276                        $tooltip_t insert end [strcat [mc "In File:"] " "] section_header
1277                        $tooltip_t insert end "$file\n"
1278                }
1279
1280                $tooltip_t insert end "\n"
1281                $tooltip_t insert end [strcat [mc "Copied Or Moved Here By:"] "\n"] section_header
1282                $tooltip_t insert end $save
1283        }
1284
1285        $tooltip_t conf -state disabled
1286        _position_tooltip $this
1287
1288        # On MacOS raising a window causes it to acquire focus.
1289        # Tk 8.5 on MacOS seems to properly support wm transient,
1290        # so we can safely counter the effect there.
1291        if {$::have_tk85 && [is_MacOSX]} {
1292                update
1293                if {$w eq {}} {
1294                        raise .
1295                } else {
1296                        raise $w
1297                }
1298        }
1299}
1300
1301method _position_tooltip {} {
1302        set max_h [lindex [split [$tooltip_t index end] .] 0]
1303        set max_w 0
1304        for {set i 1} {$i <= $max_h} {incr i} {
1305                set c [lindex [split [$tooltip_t index "$i.0 lineend"] .] 1]
1306                if {$c > $max_w} {set max_w $c}
1307        }
1308        $tooltip_t conf -width $max_w -height $max_h
1309
1310        set req_w [winfo reqwidth  $tooltip_t]
1311        set req_h [winfo reqheight $tooltip_t]
1312        set pos_x [expr {[winfo pointerx .] +  5}]
1313        set pos_y [expr {[winfo pointery .] + 10}]
1314
1315        set g "${req_w}x${req_h}"
1316        if {[tk windowingsystem] eq "win32" || $pos_x >= 0} {append g +}
1317        append g $pos_x
1318        if {[tk windowingsystem] eq "win32" || $pos_y >= 0} {append g +}
1319        append g $pos_y
1320
1321        wm geometry $tooltip_wm $g
1322        if {![is_MacOSX]} {
1323                raise $tooltip_wm
1324        }
1325}
1326
1327method _hide_tooltip {} {
1328        if {$tooltip_wm ne {}} {
1329                destroy $tooltip_wm
1330                set tooltip_wm {}
1331                set tooltip_commit {}
1332        }
1333        if {$tooltip_timer ne {}} {
1334                after cancel $tooltip_timer
1335                set tooltip_timer {}
1336        }
1337}
1338
1339method _resize {new_height} {
1340        set diff [expr {$new_height - $old_height}]
1341        if {$diff == 0} return
1342
1343        set my [expr {[winfo height $w.file_pane] - 25}]
1344        set o [$w.file_pane sash coord 0]
1345        set ox [lindex $o 0]
1346        set oy [expr {[lindex $o 1] + $diff}]
1347        if {$oy < 0}   {set oy 0}
1348        if {$oy > $my} {set oy $my}
1349        $w.file_pane sash place 0 $ox $oy
1350
1351        set old_height $new_height
1352}
1353
1354}