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git-gui: Support applying a range of changes at once
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Multiple lines can be selected in the diff viewer and applied all
at once, rather than selecting "Stage Line For Commit" on each
individual line.

Signed-off-by: Jeff Epler <jepler@unpythonic.net>
Signed-off-by: Shawn O. Pearce <spearce@spearce.org>
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Jeff Epler authored and Shawn O. Pearce committed Jan 23, 2010
1 parent 25476c6 commit ff07c3b
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Showing 2 changed files with 153 additions and 104 deletions.
15 changes: 12 additions & 3 deletions git-gui.sh
View file
Original file line number Diff line number Diff line change
Expand Up @@ -3266,7 +3266,7 @@ set ui_diff_applyhunk [$ctxm index last]
lappend diff_actions [list $ctxm entryconf $ui_diff_applyhunk -state]
$ctxm add command \
-label [mc "Apply/Reverse Line"] \
-command {apply_line $cursorX $cursorY; do_rescan}
-command {apply_range_or_line $cursorX $cursorY; do_rescan}
set ui_diff_applyline [$ctxm index last]
lappend diff_actions [list $ctxm entryconf $ui_diff_applyline -state]
$ctxm add separator
Expand Down Expand Up @@ -3348,12 +3348,21 @@ proc popup_diff_menu {ctxm ctxmmg ctxmsm x y X Y} {
} elseif {$::is_submodule_diff} {
tk_popup $ctxmsm $X $Y
} else {
set has_range [expr {[$::ui_diff tag nextrange sel 0.0] != {}}]
if {$::ui_index eq $::current_diff_side} {
set l [mc "Unstage Hunk From Commit"]
set t [mc "Unstage Line From Commit"]
if {$has_range} {
set t [mc "Unstage Lines From Commit"]
} else {
set t [mc "Unstage Line From Commit"]
}
} else {
set l [mc "Stage Hunk For Commit"]
set t [mc "Stage Line For Commit"]
if {$has_range} {
set t [mc "Stage Lines For Commit"]
} else {
set t [mc "Stage Line For Commit"]
}
}
if {$::is_3way_diff
|| $current_diff_path eq {}
Expand Down
242 changes: 141 additions & 101 deletions lib/diff.tcl
View file
Original file line number Diff line number Diff line change
Expand Up @@ -542,10 +542,23 @@ proc apply_hunk {x y} {
}
}

proc apply_line {x y} {
proc apply_range_or_line {x y} {
global current_diff_path current_diff_header current_diff_side
global ui_diff ui_index file_states

set selected [$ui_diff tag nextrange sel 0.0]

if {$selected == {}} {
set first [$ui_diff index "@$x,$y"]
set last $first
} else {
set first [lindex $selected 0]
set last [lindex $selected 1]
}

set first_l [$ui_diff index "$first linestart"]
set last_l [$ui_diff index "$last lineend"]

if {$current_diff_path eq {} || $current_diff_header eq {}} return
if {![lock_index apply_hunk]} return

Expand All @@ -568,120 +581,147 @@ proc apply_line {x y} {
}
}

set the_l [$ui_diff index @$x,$y]
set wholepatch {}

# operate only on change lines
set c1 [$ui_diff get "$the_l linestart"]
if {$c1 ne {+} && $c1 ne {-}} {
unlock_index
return
}
set sign $c1

set i_l [$ui_diff search -backwards -regexp ^@@ $the_l 0.0]
if {$i_l eq {}} {
unlock_index
return
}
# $i_l is now at the beginning of a line
while {$first_l < $last_l} {
set i_l [$ui_diff search -backwards -regexp ^@@ $first_l 0.0]
if {$i_l eq {}} {
# If there's not a @@ above, then the selected range
# must have come before the first_l @@
set i_l [$ui_diff search -regexp ^@@ $first_l $last_l]
}
if {$i_l eq {}} {
unlock_index
return
}
# $i_l is now at the beginning of a line

# pick start line number from hunk header
set hh [$ui_diff get $i_l "$i_l + 1 lines"]
set hh [lindex [split $hh ,] 0]
set hln [lindex [split $hh -] 1]
# pick start line number from hunk header
set hh [$ui_diff get $i_l "$i_l + 1 lines"]
set hh [lindex [split $hh ,] 0]
set hln [lindex [split $hh -] 1]

# There is a special situation to take care of. Consider this hunk:
#
# @@ -10,4 +10,4 @@
# context before
# -old 1
# -old 2
# +new 1
# +new 2
# context after
#
# We used to keep the context lines in the order they appear in the
# hunk. But then it is not possible to correctly stage only
# "-old 1" and "+new 1" - it would result in this staged text:
#
# context before
# old 2
# new 1
# context after
#
# (By symmetry it is not possible to *un*stage "old 2" and "new 2".)
#
# We resolve the problem by introducing an asymmetry, namely, when
# a "+" line is *staged*, it is moved in front of the context lines
# that are generated from the "-" lines that are immediately before
# the "+" block. That is, we construct this patch:
#
# @@ -10,4 +10,5 @@
# context before
# +new 1
# old 1
# old 2
# context after
#
# But we do *not* treat "-" lines that are *un*staged in a special
# way.
#
# With this asymmetry it is possible to stage the change
# "old 1" -> "new 1" directly, and to stage the change
# "old 2" -> "new 2" by first staging the entire hunk and
# then unstaging the change "old 1" -> "new 1".

# This is non-empty if and only if we are _staging_ changes;
# then it accumulates the consecutive "-" lines (after converting
# them to context lines) in order to be moved after the "+" change
# line.
set pre_context {}

set n 0
set i_l [$ui_diff index "$i_l + 1 lines"]
set patch {}
while {[$ui_diff compare $i_l < "end - 1 chars"] &&
[$ui_diff get $i_l "$i_l + 2 chars"] ne {@@}} {
set next_l [$ui_diff index "$i_l + 1 lines"]
set c1 [$ui_diff get $i_l]
if {[$ui_diff compare $i_l <= $the_l] &&
[$ui_diff compare $the_l < $next_l]} {
# the line to stage/unstage
set ln [$ui_diff get $i_l $next_l]
if {$c1 eq {-}} {
set n [expr $n+1]
# There is a special situation to take care of. Consider this
# hunk:
#
# @@ -10,4 +10,4 @@
# context before
# -old 1
# -old 2
# +new 1
# +new 2
# context after
#
# We used to keep the context lines in the order they appear in
# the hunk. But then it is not possible to correctly stage only
# "-old 1" and "+new 1" - it would result in this staged text:
#
# context before
# old 2
# new 1
# context after
#
# (By symmetry it is not possible to *un*stage "old 2" and "new
# 2".)
#
# We resolve the problem by introducing an asymmetry, namely,
# when a "+" line is *staged*, it is moved in front of the
# context lines that are generated from the "-" lines that are
# immediately before the "+" block. That is, we construct this
# patch:
#
# @@ -10,4 +10,5 @@
# context before
# +new 1
# old 1
# old 2
# context after
#
# But we do *not* treat "-" lines that are *un*staged in a
# special way.
#
# With this asymmetry it is possible to stage the change "old
# 1" -> "new 1" directly, and to stage the change "old 2" ->
# "new 2" by first staging the entire hunk and then unstaging
# the change "old 1" -> "new 1".
#
# Applying multiple lines adds complexity to the special
# situation. The pre_context must be moved after the entire
# first block of consecutive staged "+" lines, so that
# staging both additions gives the following patch:
#
# @@ -10,4 +10,6 @@
# context before
# +new 1
# +new 2
# old 1
# old 2
# context after

# This is non-empty if and only if we are _staging_ changes;
# then it accumulates the consecutive "-" lines (after
# converting them to context lines) in order to be moved after
# "+" change lines.
set pre_context {}

set n 0
set m 0
set i_l [$ui_diff index "$i_l + 1 lines"]
set patch {}
while {[$ui_diff compare $i_l < "end - 1 chars"] &&
[$ui_diff get $i_l "$i_l + 2 chars"] ne {@@}} {
set next_l [$ui_diff index "$i_l + 1 lines"]
set c1 [$ui_diff get $i_l]
if {[$ui_diff compare $first_l <= $i_l] &&
[$ui_diff compare $i_l < $last_l] &&
($c1 eq {-} || $c1 eq {+})} {
# a line to stage/unstage
set ln [$ui_diff get $i_l $next_l]
if {$c1 eq {-}} {
set n [expr $n+1]
set patch "$patch$pre_context$ln"
set pre_context {}
} else {
set m [expr $m+1]
set patch "$patch$ln"
}
} elseif {$c1 ne {-} && $c1 ne {+}} {
# context line
set ln [$ui_diff get $i_l $next_l]
set patch "$patch$pre_context$ln"
set n [expr $n+1]
set m [expr $m+1]
set pre_context {}
} elseif {$c1 eq $to_context} {
# turn change line into context line
set ln [$ui_diff get "$i_l + 1 chars" $next_l]
if {$c1 eq {-}} {
set pre_context "$pre_context $ln"
} else {
set patch "$patch $ln"
}
set n [expr $n+1]
set m [expr $m+1]
} else {
set patch "$patch$ln$pre_context"
}
set pre_context {}
} elseif {$c1 ne {-} && $c1 ne {+}} {
# context line
set ln [$ui_diff get $i_l $next_l]
set patch "$patch$pre_context$ln"
set n [expr $n+1]
set pre_context {}
} elseif {$c1 eq $to_context} {
# turn change line into context line
set ln [$ui_diff get "$i_l + 1 chars" $next_l]
if {$c1 eq {-}} {
set pre_context "$pre_context $ln"
} else {
set patch "$patch $ln"
# a change in the opposite direction of
# to_context which is outside the range of
# lines to apply.
set patch "$patch$pre_context"
set pre_context {}
}
set n [expr $n+1]
set i_l $next_l
}
set i_l $next_l
set patch "$patch$pre_context"
set wholepatch "$wholepatch@@ -$hln,$n +$hln,$m @@\n$patch"
set first_l [$ui_diff index "$next_l + 1 lines"]
}
set patch "$patch$pre_context"
set patch "@@ -$hln,$n +$hln,[eval expr $n $sign 1] @@\n$patch"

if {[catch {
set enc [get_path_encoding $current_diff_path]
set p [eval git_write $apply_cmd]
fconfigure $p -translation binary -encoding $enc
puts -nonewline $p $current_diff_header
puts -nonewline $p $patch
puts -nonewline $p $wholepatch
close $p} err]} {
error_popup [append $failed_msg "\n\n$err"]
}
Expand Down

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