git-gui: Preserve scroll position on reshow_diff.
It is especially useful for Stage/Unstage Line, because
they invoke full state scan and diff reload, which originally
would reset the scroll position to the top of the file.
Signed-off-by: Alexander Gavrilov <angavrilov@gmail.com>
Signed-off-by: Shawn O. Pearce <spearce@spearce.org>
diff --git a/lib/diff.tcl b/lib/diff.tcl
index 77990c5..52b79e4 100644
--- a/lib/diff.tcl
+++ b/lib/diff.tcl
@@ -19,6 +19,7 @@
proc reshow_diff {} {
global file_states file_lists
global current_diff_path current_diff_side
+ global ui_diff
set p $current_diff_path
if {$p eq {}} {
@@ -28,7 +29,8 @@
|| [lsearch -sorted -exact $file_lists($current_diff_side) $p] == -1} {
clear_diff
} else {
- show_diff $p $current_diff_side
+ set save_pos [lindex [$ui_diff yview] 0]
+ show_diff $p $current_diff_side {} $save_pos
}
}
@@ -52,7 +54,7 @@
rescan ui_ready 0
}
-proc show_diff {path w {lno {}}} {
+proc show_diff {path w {lno {}} {scroll_pos {}}} {
global file_states file_lists
global is_3way_diff diff_active repo_config
global ui_diff ui_index ui_workdir
@@ -151,6 +153,10 @@
$ui_diff conf -state disabled
set diff_active 0
unlock_index
+ if {$scroll_pos ne {}} {
+ update
+ $ui_diff yview moveto $scroll_pos
+ }
ui_ready
return
}
@@ -190,10 +196,10 @@
-blocking 0 \
-encoding binary \
-translation binary
- fileevent $fd readable [list read_diff $fd]
+ fileevent $fd readable [list read_diff $fd $scroll_pos]
}
-proc read_diff {fd} {
+proc read_diff {fd scroll_pos} {
global ui_diff diff_active
global is_3way_diff current_diff_header
@@ -282,6 +288,10 @@
close $fd
set diff_active 0
unlock_index
+ if {$scroll_pos ne {}} {
+ update
+ $ui_diff yview moveto $scroll_pos
+ }
ui_ready
if {[$ui_diff index end] eq {2.0}} {
