patch 7.4.849
Problem: Moving the cursor in Insert mode starts new undo sequence.
Solution: Add CTRL-G U to keep the undo sequence for the following cursor
movement command. (Christian Brabandt)
diff --git a/src/edit.c b/src/edit.c
index b48a217..db4a079 100644
--- a/src/edit.c
+++ b/src/edit.c
@@ -202,6 +202,8 @@
static void check_auto_format __ARGS((int));
static void redo_literal __ARGS((int c));
static void start_arrow __ARGS((pos_T *end_insert_pos));
+static void start_arrow_with_change __ARGS((pos_T *end_insert_pos, int change));
+static void start_arrow_common __ARGS((pos_T *end_insert_pos, int change));
#ifdef FEAT_SPELL
static void check_spell_redraw __ARGS((void));
static void spell_back_to_badword __ARGS((void));
@@ -241,11 +243,11 @@
#if defined(FEAT_GUI_TABLINE) || defined(PROTO)
static void ins_tabline __ARGS((int c));
#endif
-static void ins_left __ARGS((void));
+static void ins_left __ARGS((int end_change));
static void ins_home __ARGS((int c));
static void ins_end __ARGS((int c));
static void ins_s_left __ARGS((void));
-static void ins_right __ARGS((void));
+static void ins_right __ARGS((int end_change));
static void ins_s_right __ARGS((void));
static void ins_up __ARGS((int startcol));
static void ins_pageup __ARGS((void));
@@ -297,6 +299,8 @@
static int did_add_space = FALSE; /* auto_format() added an extra space
under the cursor */
+static int dont_sync_undo = FALSE; /* CTRL-G U prevents syncing undo for
+ the next left/right cursor */
/*
* edit(): Start inserting text.
@@ -767,6 +771,12 @@
*/
if (c != K_CURSORHOLD)
lastc = c; /* remember the previous char for CTRL-D */
+
+ /* After using CTRL-G U the next cursor key will not break undo. */
+ if (dont_sync_undo == MAYBE)
+ dont_sync_undo = TRUE;
+ else
+ dont_sync_undo = FALSE;
do
{
c = safe_vgetc();
@@ -1237,7 +1247,7 @@
if (mod_mask & (MOD_MASK_SHIFT|MOD_MASK_CTRL))
ins_s_left();
else
- ins_left();
+ ins_left(dont_sync_undo == FALSE);
break;
case K_S_LEFT: /* <S-Left> */
@@ -1249,7 +1259,7 @@
if (mod_mask & (MOD_MASK_SHIFT|MOD_MASK_CTRL))
ins_s_right();
else
- ins_right();
+ ins_right(dont_sync_undo == FALSE);
break;
case K_S_RIGHT: /* <S-Right> */
@@ -6787,9 +6797,34 @@
*/
static void
start_arrow(end_insert_pos)
- pos_T *end_insert_pos; /* can be NULL */
+ pos_T *end_insert_pos; /* can be NULL */
{
- if (!arrow_used) /* something has been inserted */
+ start_arrow_common(end_insert_pos, TRUE);
+}
+
+/*
+ * Like start_arrow() but with end_change argument.
+ * Will prepare for redo of CTRL-G U if "end_change" is FALSE.
+ */
+ static void
+start_arrow_with_change(end_insert_pos, end_change)
+ pos_T *end_insert_pos; /* can be NULL */
+ int end_change; /* end undoable change */
+{
+ start_arrow_common(end_insert_pos, end_change);
+ if (!end_change)
+ {
+ AppendCharToRedobuff(Ctrl_G);
+ AppendCharToRedobuff('U');
+ }
+}
+
+ static void
+start_arrow_common(end_insert_pos, end_change)
+ pos_T *end_insert_pos; /* can be NULL */
+ int end_change; /* end undoable change */
+{
+ if (!arrow_used && end_change) /* something has been inserted */
{
AppendToRedobuff(ESC_STR);
stop_insert(end_insert_pos, FALSE, FALSE);
@@ -8359,6 +8394,13 @@
Insstart = curwin->w_cursor;
break;
+ /* CTRL-G U: do not break undo with the next char */
+ case 'U':
+ /* Allow one left/right cursor movement with the next char,
+ * without breaking undo. */
+ dont_sync_undo = MAYBE;
+ break;
+
/* Unknown CTRL-G command, reserved for future expansion. */
default: vim_beep(BO_CTRLG);
}
@@ -9440,7 +9482,8 @@
#endif
static void
-ins_left()
+ins_left(end_change)
+ int end_change; /* end undoable change */
{
pos_T tpos;
@@ -9457,7 +9500,11 @@
* break undo. K_LEFT is inserted in im_correct_cursor(). */
if (!im_is_preediting())
#endif
- start_arrow(&tpos);
+ {
+ start_arrow_with_change(&tpos, end_change);
+ if (!end_change)
+ AppendCharToRedobuff(K_LEFT);
+ }
#ifdef FEAT_RIGHTLEFT
/* If exit reversed string, position is fixed */
if (revins_scol != -1 && (int)curwin->w_cursor.col >= revins_scol)
@@ -9472,6 +9519,7 @@
*/
else if (vim_strchr(p_ww, '[') != NULL && curwin->w_cursor.lnum > 1)
{
+ /* always break undo when moving upwards/downwards, else undo may break */
start_arrow(&tpos);
--(curwin->w_cursor.lnum);
coladvance((colnr_T)MAXCOL);
@@ -9479,6 +9527,7 @@
}
else
vim_beep(BO_CRSR);
+ dont_sync_undo = FALSE;
}
static void
@@ -9542,7 +9591,8 @@
}
static void
-ins_right()
+ins_right(end_change)
+ int end_change; /* end undoable change */
{
#ifdef FEAT_FOLDING
if ((fdo_flags & FDO_HOR) && KeyTyped)
@@ -9555,7 +9605,9 @@
#endif
)
{
- start_arrow(&curwin->w_cursor);
+ start_arrow_with_change(&curwin->w_cursor, end_change);
+ if (!end_change)
+ AppendCharToRedobuff(K_RIGHT);
curwin->w_set_curswant = TRUE;
#ifdef FEAT_VIRTUALEDIT
if (virtual_active())
@@ -9589,6 +9641,7 @@
}
else
vim_beep(BO_CRSR);
+ dont_sync_undo = FALSE;
}
static void