vis

commit e627df41fb121f1db75902406d05d91074718fab
parent 502340a5f7d27b71126cd84293ccdb0381b5ff24
Author: Marc André Tanner <mat@brain-dump.org>
Date:   Wed,  9 Nov 2016 13:52:17 +0100

vis: perform undo snapshotting more rarerly

Do not take snapshots after every operation in insert/replace mode.
As an example up until now we would take a snapshot after every
<Backspace>/<Delete> press, hence when undoing changes each character
would be restored individually. The same applies for <C-w> and related
actions.

From now on we only snaphost when:

 - transitioning from insert/replace mode to normal mode (but not when
   switching to operator pending mode)

 - an operation takes place from normal mode

 - an idle time expires in normal/replace mode

Diffstat:
M
vis-modes.c
 | 
14
++++++++------
M
vis.c
 | 
4
+++-

2 files changed, 11 insertions(+), 7 deletions(-)
diff --git a/vis-modes.c b/vis-modes.c
@@ -132,10 +132,11 @@ static void vis_mode_insert_enter(Vis *vis, Mode *old) {
 }
 
 static void vis_mode_insert_leave(Vis *vis, Mode *new) {
-	/* make sure we can recover the current state after an editing operation */
-	text_snapshot(vis->win->file->text);
-	if (new == mode_get(vis, VIS_MODE_NORMAL))
+	if (new == mode_get(vis, VIS_MODE_NORMAL)) {
+		/* make sure we can recover the current state after an editing operation */
+		text_snapshot(vis->win->file->text);
 		macro_operator_stop(vis);
+	}
 }
 
 static void vis_mode_insert_idle(Vis *vis) {
@@ -161,10 +162,11 @@ static void vis_mode_replace_enter(Vis *vis, Mode *old) {
 }
 
 static void vis_mode_replace_leave(Vis *vis, Mode *new) {
-	/* make sure we can recover the current state after an editing operation */
-	text_snapshot(vis->win->file->text);
-	if (new == mode_get(vis, VIS_MODE_NORMAL))
+	if (new == mode_get(vis, VIS_MODE_NORMAL)) {
+		/* make sure we can recover the current state after an editing operation */
+		text_snapshot(vis->win->file->text);
 		macro_operator_stop(vis);
+	}
 }
 
 static void vis_mode_replace_input(Vis *vis, const char *str, size_t len) {
diff --git a/vis.c b/vis.c
@@ -718,7 +718,9 @@ void vis_do(Vis *vis) {
 		} else if (vis->mode->visual) {
 			vis_mode_switch(vis, VIS_MODE_NORMAL);
 		}
-		text_snapshot(txt);
+
+		if (vis->mode == &vis_modes[VIS_MODE_NORMAL])
+			text_snapshot(txt);
 		vis_draw(vis);
 	}