diff options
Diffstat (limited to 'git-gui/lib/diff.tcl')
| -rw-r--r-- | git-gui/lib/diff.tcl | 336 |
1 files changed, 336 insertions, 0 deletions
diff --git a/git-gui/lib/diff.tcl b/git-gui/lib/diff.tcl new file mode 100644 index 0000000..7e715a6 --- /dev/null +++ b/git-gui/lib/diff.tcl @@ -0,0 +1,336 @@ +# git-gui diff viewer +# Copyright (C) 2006, 2007 Shawn Pearce + +proc clear_diff {} { + global ui_diff current_diff_path current_diff_header + global ui_index ui_workdir + + $ui_diff conf -state normal + $ui_diff delete 0.0 end + $ui_diff conf -state disabled + + set current_diff_path {} + set current_diff_header {} + + $ui_index tag remove in_diff 0.0 end + $ui_workdir tag remove in_diff 0.0 end +} + +proc reshow_diff {} { + global ui_status_value file_states file_lists + global current_diff_path current_diff_side + + set p $current_diff_path + if {$p eq {}} { + # No diff is being shown. + } elseif {$current_diff_side eq {} + || [catch {set s $file_states($p)}] + || [lsearch -sorted -exact $file_lists($current_diff_side) $p] == -1} { + clear_diff + } else { + show_diff $p $current_diff_side + } +} + +proc handle_empty_diff {} { + global current_diff_path file_states file_lists + + set path $current_diff_path + set s $file_states($path) + if {[lindex $s 0] ne {_M}} return + + info_popup "No differences detected. + +[short_path $path] has no changes. + +The modification date of this file was updated by another application, but the content within the file was not changed. + +A rescan will be automatically started to find other files which may have the same state." + + clear_diff + display_file $path __ + rescan {set ui_status_value {Ready.}} 0 +} + +proc show_diff {path w {lno {}}} { + global file_states file_lists + global is_3way_diff diff_active repo_config + global ui_diff ui_status_value ui_index ui_workdir + global current_diff_path current_diff_side current_diff_header + + if {$diff_active || ![lock_index read]} return + + clear_diff + if {$lno == {}} { + set lno [lsearch -sorted -exact $file_lists($w) $path] + if {$lno >= 0} { + incr lno + } + } + if {$lno >= 1} { + $w tag add in_diff $lno.0 [expr {$lno + 1}].0 + } + + set s $file_states($path) + set m [lindex $s 0] + set is_3way_diff 0 + set diff_active 1 + set current_diff_path $path + set current_diff_side $w + set current_diff_header {} + set ui_status_value "Loading diff of [escape_path $path]..." + + # - Git won't give us the diff, there's nothing to compare to! + # + if {$m eq {_O}} { + set max_sz [expr {128 * 1024}] + if {[catch { + set fd [open $path r] + set content [read $fd $max_sz] + close $fd + set sz [file size $path] + } err ]} { + set diff_active 0 + unlock_index + set ui_status_value "Unable to display [escape_path $path]" + error_popup "Error loading file:\n\n$err" + return + } + $ui_diff conf -state normal + if {![catch {set type [exec file $path]}]} { + set n [string length $path] + if {[string equal -length $n $path $type]} { + set type [string range $type $n end] + regsub {^:?\s*} $type {} type + } + $ui_diff insert end "* $type\n" d_@ + } + if {[string first "\0" $content] != -1} { + $ui_diff insert end \ + "* Binary file (not showing content)." \ + d_@ + } else { + if {$sz > $max_sz} { + $ui_diff insert end \ +"* Untracked file is $sz bytes. +* Showing only first $max_sz bytes. +" d_@ + } + $ui_diff insert end $content + if {$sz > $max_sz} { + $ui_diff insert end " +* Untracked file clipped here by [appname]. +* To see the entire file, use an external editor. +" d_@ + } + } + $ui_diff conf -state disabled + set diff_active 0 + unlock_index + set ui_status_value {Ready.} + return + } + + set cmd [list | git] + if {$w eq $ui_index} { + lappend cmd diff-index + lappend cmd --cached + } elseif {$w eq $ui_workdir} { + if {[string index $m 0] eq {U}} { + lappend cmd diff + } else { + lappend cmd diff-files + } + } + + lappend cmd -p + lappend cmd --no-color + if {$repo_config(gui.diffcontext) > 0} { + lappend cmd "-U$repo_config(gui.diffcontext)" + } + if {$w eq $ui_index} { + lappend cmd [PARENT] + } + lappend cmd -- + lappend cmd $path + + if {[catch {set fd [open $cmd r]} err]} { + set diff_active 0 + unlock_index + set ui_status_value "Unable to display [escape_path $path]" + error_popup "Error loading diff:\n\n$err" + return + } + + fconfigure $fd \ + -blocking 0 \ + -encoding binary \ + -translation binary + fileevent $fd readable [list read_diff $fd] +} + +proc read_diff {fd} { + global ui_diff ui_status_value diff_active + global is_3way_diff current_diff_header + + $ui_diff conf -state normal + while {[gets $fd line] >= 0} { + # -- Cleanup uninteresting diff header lines. + # + if { [string match {diff --git *} $line] + || [string match {diff --cc *} $line] + || [string match {diff --combined *} $line] + || [string match {--- *} $line] + || [string match {+++ *} $line]} { + append current_diff_header $line "\n" + continue + } + if {[string match {index *} $line]} continue + if {$line eq {deleted file mode 120000}} { + set line "deleted symlink" + } + + # -- Automatically detect if this is a 3 way diff. + # + if {[string match {@@@ *} $line]} {set is_3way_diff 1} + + if {[string match {mode *} $line] + || [string match {new file *} $line] + || [string match {deleted file *} $line] + || [string match {Binary files * and * differ} $line] + || $line eq {\ No newline at end of file} + || [regexp {^\* Unmerged path } $line]} { + set tags {} + } elseif {$is_3way_diff} { + set op [string range $line 0 1] + switch -- $op { + { } {set tags {}} + {@@} {set tags d_@} + { +} {set tags d_s+} + { -} {set tags d_s-} + {+ } {set tags d_+s} + {- } {set tags d_-s} + {--} {set tags d_--} + {++} { + if {[regexp {^\+\+([<>]{7} |={7})} $line _g op]} { + set line [string replace $line 0 1 { }] + set tags d$op + } else { + set tags d_++ + } + } + default { + puts "error: Unhandled 3 way diff marker: {$op}" + set tags {} + } + } + } else { + set op [string index $line 0] + switch -- $op { + { } {set tags {}} + {@} {set tags d_@} + {-} {set tags d_-} + {+} { + if {[regexp {^\+([<>]{7} |={7})} $line _g op]} { + set line [string replace $line 0 0 { }] + set tags d$op + } else { + set tags d_+ + } + } + default { + puts "error: Unhandled 2 way diff marker: {$op}" + set tags {} + } + } + } + $ui_diff insert end $line $tags + if {[string index $line end] eq "\r"} { + $ui_diff tag add d_cr {end - 2c} + } + $ui_diff insert end "\n" $tags + } + $ui_diff conf -state disabled + + if {[eof $fd]} { + close $fd + set diff_active 0 + unlock_index + set ui_status_value {Ready.} + + if {[$ui_diff index end] eq {2.0}} { + handle_empty_diff + } + } +} + +proc apply_hunk {x y} { + global current_diff_path current_diff_header current_diff_side + global ui_diff ui_index file_states + + if {$current_diff_path eq {} || $current_diff_header eq {}} return + if {![lock_index apply_hunk]} return + + set apply_cmd {git apply --cached --whitespace=nowarn} + set mi [lindex $file_states($current_diff_path) 0] + if {$current_diff_side eq $ui_index} { + set mode unstage + lappend apply_cmd --reverse + if {[string index $mi 0] ne {M}} { + unlock_index + return + } + } else { + set mode stage + if {[string index $mi 1] ne {M}} { + unlock_index + return + } + } + + set s_lno [lindex [split [$ui_diff index @$x,$y] .] 0] + set s_lno [$ui_diff search -backwards -regexp ^@@ $s_lno.0 0.0] + if {$s_lno eq {}} { + unlock_index + return + } + + set e_lno [$ui_diff search -forwards -regexp ^@@ "$s_lno + 1 lines" end] + if {$e_lno eq {}} { + set e_lno end + } + + if {[catch { + set p [open "| $apply_cmd" w] + fconfigure $p -translation binary -encoding binary + puts -nonewline $p $current_diff_header + puts -nonewline $p [$ui_diff get $s_lno $e_lno] + close $p} err]} { + error_popup "Failed to $mode selected hunk.\n\n$err" + unlock_index + return + } + + $ui_diff conf -state normal + $ui_diff delete $s_lno $e_lno + $ui_diff conf -state disabled + + if {[$ui_diff get 1.0 end] eq "\n"} { + set o _ + } else { + set o ? + } + + if {$current_diff_side eq $ui_index} { + set mi ${o}M + } elseif {[string index $mi 0] eq {_}} { + set mi M$o + } else { + set mi ?$o + } + unlock_index + display_file $current_diff_path $mi + if {$o eq {_}} { + clear_diff + } +} |