Dear Pratyush,
I just noticed that the 'Revert Last Hunk' menu entry is enabled in
the stage-list. But I think it should be disabled, like the 'Revert
Hunk' and 'Revert Line' menu entry.
Can you confirm this?
Thanks.
Bert
On Wed, Aug 28, 2019 at 11:57 PM Pratyush Yadav <me@xxxxxxxxxxxxxxxxx> wrote:
>
> Accidental clicks on the revert hunk/lines buttons can cause loss of
> work, and can be frustrating. So, allow undoing the last revert.
>
> Right now, a stack or deque are not being used for the sake of
> simplicity, so only one undo is possible. Any reverts before the
> previous one are lost.
>
> Signed-off-by: Pratyush Yadav <me@xxxxxxxxxxxxxxxxx>
> ---
> git-gui.sh | 18 +++++++++++++++++-
> lib/diff.tcl | 53 ++++++++++++++++++++++++++++++++++++++++++++++++----
> 2 files changed, 66 insertions(+), 5 deletions(-)
>
> diff --git a/git-gui.sh b/git-gui.sh
> index 1592544..e03a2d2 100755
> --- a/git-gui.sh
> +++ b/git-gui.sh
> @@ -1350,6 +1350,8 @@ set is_submodule_diff 0
> set is_conflict_diff 0
> set selected_commit_type new
> set diff_empty_count 0
> +set last_revert {}
> +set last_revert_enc {}
>
> set nullid "0000000000000000000000000000000000000000"
> set nullid2 "0000000000000000000000000000000000000001"
> @@ -3601,6 +3603,11 @@ $ctxm add command \
> -command {apply_or_revert_range_or_line $cursorX $cursorY 1; do_rescan}
> set ui_diff_revertline [$ctxm index last]
> lappend diff_actions [list $ctxm entryconf $ui_diff_revertline -state]
> +$ctxm add command \
> + -label [mc "Undo Last Revert"] \
> + -command {undo_last_revert; do_rescan}
> +set ui_diff_undorevert [$ctxm index last]
> +lappend diff_actions [list $ctxm entryconf $ui_diff_undorevert -state]
> $ctxm add separator
> $ctxm add command \
> -label [mc "Show Less Context"] \
> @@ -3680,7 +3687,7 @@ proc has_textconv {path} {
> }
>
> proc popup_diff_menu {ctxm ctxmmg ctxmsm x y X Y} {
> - global current_diff_path file_states
> + global current_diff_path file_states last_revert
> set ::cursorX $x
> set ::cursorY $y
> if {[info exists file_states($current_diff_path)]} {
> @@ -3694,6 +3701,7 @@ proc popup_diff_menu {ctxm ctxmmg ctxmsm x y X Y} {
> tk_popup $ctxmsm $X $Y
> } else {
> set has_range [expr {[$::ui_diff tag nextrange sel 0.0] != {}}]
> + set u [mc "Undo Last Revert"]
> if {$::ui_index eq $::current_diff_side} {
> set l [mc "Unstage Hunk From Commit"]
> set h [mc "Revert Hunk"]
> @@ -3739,12 +3747,20 @@ proc popup_diff_menu {ctxm ctxmmg ctxmsm x y X Y} {
> }
> }
>
> + if {$last_revert eq {}} {
> + set undo_state disabled
> + } else {
> + set undo_state normal
> + }
> +
> $ctxm entryconf $::ui_diff_applyhunk -state $s -label $l
> $ctxm entryconf $::ui_diff_applyline -state $s -label $t
> $ctxm entryconf $::ui_diff_revertline -state $revert_state \
> -label $r
> $ctxm entryconf $::ui_diff_reverthunk -state $revert_state \
> -label $h
> + $ctxm entryconf $::ui_diff_undorevert -state $undo_state \
> + -label $u
>
> tk_popup $ctxm $X $Y
> }
> diff --git a/lib/diff.tcl b/lib/diff.tcl
> index 0659029..96288fc 100644
> --- a/lib/diff.tcl
> +++ b/lib/diff.tcl
> @@ -569,7 +569,7 @@ proc read_diff {fd conflict_size cont_info} {
>
> proc apply_or_revert_hunk {x y revert} {
> global current_diff_path current_diff_header current_diff_side
> - global ui_diff ui_index file_states
> + global ui_diff ui_index file_states last_revert last_revert_enc
>
> if {$current_diff_path eq {} || $current_diff_header eq {}} return
> if {![lock_index apply_hunk]} return
> @@ -610,18 +610,25 @@ proc apply_or_revert_hunk {x y revert} {
> set e_lno end
> }
>
> + set wholepatch "$current_diff_header[$ui_diff get $s_lno $e_lno]"
> +
> 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 $p [$ui_diff get $s_lno $e_lno]
> + puts -nonewline $p $wholepatch
> close $p} err]} {
> error_popup "$failed_msg\n\n$err"
> unlock_index
> return
> }
>
> + if {$revert} {
> + # Save a copy of this patch for undoing reverts.
> + set last_revert $wholepatch
> + set last_revert_enc $enc
> + }
> +
> $ui_diff conf -state normal
> $ui_diff delete $s_lno $e_lno
> $ui_diff conf -state disabled
> @@ -653,7 +660,7 @@ proc apply_or_revert_hunk {x y revert} {
>
> proc apply_or_revert_range_or_line {x y revert} {
> global current_diff_path current_diff_header current_diff_side
> - global ui_diff ui_index file_states
> + global ui_diff ui_index file_states last_revert
>
> set selected [$ui_diff tag nextrange sel 0.0]
>
> @@ -852,5 +859,43 @@ proc apply_or_revert_range_or_line {x y revert} {
> return
> }
>
> + if {$revert} {
> + # Save a copy of this patch for undoing reverts.
> + set last_revert $current_diff_header$wholepatch
> + set last_revert_enc $enc
> + }
> +
> + unlock_index
> +}
> +
> +# Undo the last line/hunk reverted. When hunks and lines are reverted, a copy
> +# of the diff applied is saved. Re-apply that diff to undo the revert.
> +#
> +# Right now, we only use a single variable to hold the copy, and not a
> +# stack/deque for simplicity, so multiple undos are not possible. Maybe this
> +# can be added if the need for something like this is felt in the future.
> +proc undo_last_revert {} {
> + global last_revert current_diff_path current_diff_header
> + global last_revert_enc
> +
> + if {$last_revert eq {}} return
> + if {![lock_index apply_hunk]} return
> +
> + set apply_cmd {apply --whitespace=nowarn}
> + set failed_msg [mc "Failed to undo last revert."]
> +
> + if {[catch {
> + set enc $last_revert_enc
> + set p [eval git_write $apply_cmd]
> + fconfigure $p -translation binary -encoding $enc
> + puts -nonewline $p $last_revert
> + close $p} err]} {
> + error_popup "$failed_msg\n\n$err"
> + unlock_index
> + return
> + }
> +
> + set last_revert {}
> +
> unlock_index
> }
> --
> 2.21.0
>
