git-gui/lib/browser.tcl

   1 # git-gui tree browser
   2 # Copyright (C) 2006, 2007 Shawn Pearce
   3
   4 class browser {
   5
   6 field w
   7 field browser_commit
   8 field browser_path
   9 field browser_files  {}
  10 field browser_status {Starting...}
  11 field browser_stack  {}
  12 field browser_busy   1
  13
  14 field ls_buf     {}; # Buffered record output from ls-tree
  15
  16 constructor new {commit} {
  17         global cursor_ptr M1B
  18         make_toplevel top w
  19         wm title $top "[appname] ([reponame]): File Browser"
  20
  21         set browser_commit $commit
  22         set browser_path $browser_commit:
  23
  24         label $w.path \
  25                 -textvariable @browser_path \
  26                 -anchor w \
  27                 -justify left \
  28                 -borderwidth 1 \
  29                 -relief sunken \
  30                 -font font_uibold
  31         pack $w.path -anchor w -side top -fill x
  32
  33         frame $w.list
  34         set w_list $w.list.l
  35         text $w_list -background white -borderwidth 0 \
  36                 -cursor $cursor_ptr \
  37                 -state disabled \
  38                 -wrap none \
  39                 -height 20 \
  40                 -width 70 \
  41                 -xscrollcommand [list $w.list.sbx set] \
  42                 -yscrollcommand [list $w.list.sby set]
  43         $w_list tag conf in_sel \
  44                 -background [$w_list cget -foreground] \
  45                 -foreground [$w_list cget -background]
  46         scrollbar $w.list.sbx -orient h -command [list $w_list xview]
  47         scrollbar $w.list.sby -orient v -command [list $w_list yview]
  48         pack $w.list.sbx -side bottom -fill x
  49         pack $w.list.sby -side right -fill y
  50         pack $w_list -side left -fill both -expand 1
  51         pack $w.list -side top -fill both -expand 1
  52
  53         label $w.status \
  54                 -textvariable @browser_status \
  55                 -anchor w \
  56                 -justify left \
  57                 -borderwidth 1 \
  58                 -relief sunken
  59         pack $w.status -anchor w -side bottom -fill x
  60
  61         bind $w_list <Button-1>        "[cb _click 0 @%x,%y];break"
  62         bind $w_list <Double-Button-1> "[cb _click 1 @%x,%y];break"
  63         bind $w_list <$M1B-Up>         "[cb _parent]        ;break"
  64         bind $w_list <$M1B-Left>       "[cb _parent]        ;break"
  65         bind $w_list <Up>              "[cb _move -1]       ;break"
  66         bind $w_list <Down>            "[cb _move  1]       ;break"
  67         bind $w_list <$M1B-Right>      "[cb _enter]         ;break"
  68         bind $w_list <Return>          "[cb _enter]         ;break"
  69         bind $w_list <Prior>           "[cb _page -1]       ;break"
  70         bind $w_list <Next>            "[cb _page  1]       ;break"
  71         bind $w_list <Left>            break
  72         bind $w_list <Right>           break
  73
  74         bind $w_list <Visibility> [list focus $w_list]
  75         set w $w_list
  76         _ls $this $browser_commit
  77         return $this
  78 }
  79
  80 method _move {dir} {
  81         if {$browser_busy} return
  82         set lno [lindex [split [$w index in_sel.first] .] 0]
  83         incr lno $dir
  84         if {[lindex $browser_files [expr {$lno - 1}]] ne {}} {
  85                 $w tag remove in_sel 0.0 end
  86                 $w tag add in_sel $lno.0 [expr {$lno + 1}].0
  87                 $w see $lno.0
  88         }
  89 }
  90
  91 method _page {dir} {
  92         if {$browser_busy} return
  93         $w yview scroll $dir pages
  94         set lno [expr {int(
  95                   [lindex [$w yview] 0]
  96                 * [llength $browser_files]
  97                 + 1)}]
  98         if {[lindex $browser_files [expr {$lno - 1}]] ne {}} {
  99                 $w tag remove in_sel 0.0 end
 100                 $w tag add in_sel $lno.0 [expr {$lno + 1}].0
 101                 $w see $lno.0
 102         }
 103 }
 104
 105 method _parent {} {
 106         if {$browser_busy} return
 107         set info [lindex $browser_files 0]
 108         if {[lindex $info 0] eq {parent}} {
 109                 set parent [lindex $browser_stack end-1]
 110                 set browser_stack [lrange $browser_stack 0 end-2]
 111                 if {$browser_stack eq {}} {
 112                         regsub {:.*$} $browser_path {:} browser_path
 113                 } else {
 114                         regsub {/[^/]+$} $browser_path {} browser_path
 115                 }
 116                 set browser_status "Loading $browser_path..."
 117                 _ls $this [lindex $parent 0] [lindex $parent 1]
 118         }
 119 }
 120
 121 method _enter {} {
 122         if {$browser_busy} return
 123         set lno [lindex [split [$w index in_sel.first] .] 0]
 124         set info [lindex $browser_files [expr {$lno - 1}]]
 125         if {$info ne {}} {
 126                 switch -- [lindex $info 0] {
 127                 parent {
 128                         _parent $this
 129                 }
 130                 tree {
 131                         set name [lindex $info 2]
 132                         set escn [escape_path $name]
 133                         set browser_status "Loading $escn..."
 134                         append browser_path $escn
 135                         _ls $this [lindex $info 1] $name
 136                 }
 137                 blob {
 138                         set name [lindex $info 2]
 139                         set p {}
 140                         foreach n $browser_stack {
 141                                 append p [lindex $n 1]
 142                         }
 143                         append p $name
 144                         blame::new $browser_commit $p
 145                 }
 146                 }
 147         }
 148 }
 149
 150 method _click {was_double_click pos} {
 151         if {$browser_busy} return
 152         set lno [lindex [split [$w index $pos] .] 0]
 153         focus $w
 154
 155         if {[lindex $browser_files [expr {$lno - 1}]] ne {}} {
 156                 $w tag remove in_sel 0.0 end
 157                 $w tag add in_sel $lno.0 [expr {$lno + 1}].0
 158                 if {$was_double_click} {
 159                         _enter $this
 160                 }
 161         }
 162 }
 163
 164 method _ls {tree_id {name {}}} {
 165         set ls_buf {}
 166         set browser_files {}
 167         set browser_busy 1
 168
 169         $w conf -state normal
 170         $w tag remove in_sel 0.0 end
 171         $w delete 0.0 end
 172         if {$browser_stack ne {}} {
 173                 $w image create end \
 174                         -align center -padx 5 -pady 1 \
 175                         -name icon0 \
 176                         -image file_uplevel
 177                 $w insert end {[Up To Parent]}
 178                 lappend browser_files parent
 179         }
 180         lappend browser_stack [list $tree_id $name]
 181         $w conf -state disabled
 182
 183         set cmd [list git ls-tree -z $tree_id]
 184         set fd [open "| $cmd" r]
 185         fconfigure $fd -blocking 0 -translation binary -encoding binary
 186         fileevent $fd readable [cb _read $fd]
 187 }
 188
 189 method _read {fd} {
 190         append ls_buf [read $fd]
 191         set pck [split $ls_buf "\0"]
 192         set ls_buf [lindex $pck end]
 193
 194         set n [llength $browser_files]
 195         $w conf -state normal
 196         foreach p [lrange $pck 0 end-1] {
 197                 set tab [string first "\t" $p]
 198                 if {$tab == -1} continue
 199
 200                 set info [split [string range $p 0 [expr {$tab - 1}]] { }]
 201                 set path [string range $p [expr {$tab + 1}] end]
 202                 set type   [lindex $info 1]
 203                 set object [lindex $info 2]
 204
 205                 switch -- $type {
 206                 blob {
 207                         set image file_mod
 208                 }
 209                 tree {
 210                         set image file_dir
 211                         append path /
 212                 }
 213                 default {
 214                         set image file_question
 215                 }
 216                 }
 217
 218                 if {$n > 0} {$w insert end "\n"}
 219                 $w image create end \
 220                         -align center -padx 5 -pady 1 \
 221                         -name icon[incr n] \
 222                         -image $image
 223                 $w insert end [escape_path $path]
 224                 lappend browser_files [list $type $object $path]
 225         }
 226         $w conf -state disabled
 227
 228         if {[eof $fd]} {
 229                 close $fd
 230                 set browser_status Ready.
 231                 set browser_busy 0
 232                 set ls_buf {}
 233                 if {$n > 0} {
 234                         $w tag add in_sel 1.0 2.0
 235                         focus -force $w
 236                 }
 237         }
 238 } ifdeleted {
 239         catch {close $fd}
 240 }
 241
 242 }