updated for version 7.3.862

Problem:    Dragging the status line can be slow.
Solution:   Look ahead and drop the drag event if there is a next one.

5 files changed, 63 insertions, 45 deletions

diff --git a/src/eval.c b/src/eval.c
index ad200598b..7df4f7dda 100644
--- a/src/eval.c
+++ b/src/eval.c
@@ -11238,27 +11238,7 @@ f_getchar(argvars, rettv)
 	rettv->vval.v_string = vim_strsave(temp);
 
 #ifdef FEAT_MOUSE
-	if (n == K_LEFTMOUSE
-		|| n == K_LEFTMOUSE_NM
-		|| n == K_LEFTDRAG
-		|| n == K_LEFTRELEASE
-		|| n == K_LEFTRELEASE_NM
-		|| n == K_MIDDLEMOUSE
-		|| n == K_MIDDLEDRAG
-		|| n == K_MIDDLERELEASE
-		|| n == K_RIGHTMOUSE
-		|| n == K_RIGHTDRAG
-		|| n == K_RIGHTRELEASE
-		|| n == K_X1MOUSE
-		|| n == K_X1DRAG
-		|| n == K_X1RELEASE
-		|| n == K_X2MOUSE
-		|| n == K_X2DRAG
-		|| n == K_X2RELEASE
-		|| n == K_MOUSELEFT
-		|| n == K_MOUSERIGHT
-		|| n == K_MOUSEDOWN
-		|| n == K_MOUSEUP)
+	if (is_mouse_key(n))
 	{
 	    int		row = mouse_row;
 	    int		col = mouse_col;
diff --git a/src/misc1.c b/src/misc1.c
index 5003ae5b1..94c2b4176 100644
--- a/src/misc1.c
+++ b/src/misc1.c
@@ -3288,6 +3288,38 @@ ask_yesno(str, direct)
     return r;
 }
 
+#if defined(FEAT_MOUSE) || defined(PROTO)
+/*
+ * Return TRUE if "c" is a mouse key.
+ */
+    int
+is_mouse_key(c)
+    int c;
+{
+    return c == K_LEFTMOUSE
+	|| c == K_LEFTMOUSE_NM
+	|| c == K_LEFTDRAG
+	|| c == K_LEFTRELEASE
+	|| c == K_LEFTRELEASE_NM
+	|| c == K_MIDDLEMOUSE
+	|| c == K_MIDDLEDRAG
+	|| c == K_MIDDLERELEASE
+	|| c == K_RIGHTMOUSE
+	|| c == K_RIGHTDRAG
+	|| c == K_RIGHTRELEASE
+	|| c == K_MOUSEDOWN
+	|| c == K_MOUSEUP
+	|| c == K_MOUSELEFT
+	|| c == K_MOUSERIGHT
+	|| c == K_X1MOUSE
+	|| c == K_X1DRAG
+	|| c == K_X1RELEASE
+	|| c == K_X2MOUSE
+	|| c == K_X2DRAG
+	|| c == K_X2RELEASE;
+}
+#endif
+
 /*
  * Get a key stroke directly from the user.
  * Ignores mouse clicks and scrollbar events, except a click for the left
@@ -3373,31 +3405,10 @@ get_keystroke()
 	    n = TO_SPECIAL(buf[1], buf[2]);
 	    if (buf[1] == KS_MODIFIER
 		    || n == K_IGNORE
-#ifdef FEAT_MOUSE
-		    || n == K_LEFTMOUSE_NM
-		    || n == K_LEFTDRAG
-		    || n == K_LEFTRELEASE
-		    || n == K_LEFTRELEASE_NM
-		    || n == K_MIDDLEMOUSE
-		    || n == K_MIDDLEDRAG
-		    || n == K_MIDDLERELEASE
-		    || n == K_RIGHTMOUSE
-		    || n == K_RIGHTDRAG
-		    || n == K_RIGHTRELEASE
-		    || n == K_MOUSEDOWN
-		    || n == K_MOUSEUP
-		    || n == K_MOUSELEFT
-		    || n == K_MOUSERIGHT
-		    || n == K_X1MOUSE
-		    || n == K_X1DRAG
-		    || n == K_X1RELEASE
-		    || n == K_X2MOUSE
-		    || n == K_X2DRAG
-		    || n == K_X2RELEASE
-# ifdef FEAT_GUI
+		    || (is_mouse_key(n) && n != K_LEFTMOUSE)
+#ifdef FEAT_GUI
 		    || n == K_VER_SCROLLBAR
 		    || n == K_HOR_SCROLLBAR
-# endif
 #endif
 	       )
 	    {
diff --git a/src/normal.c b/src/normal.c
index 3de170d6e..d6c0abb11 100644
--- a/src/normal.c
+++ b/src/normal.c
@@ -2443,7 +2443,31 @@ do_mouse(oap, c, dir, count, fixindent)
 		return FALSE;
 	}
 
-    which_button = get_mouse_button(KEY2TERMCAP1(c), &is_click, &is_drag);
+    for (;;)
+    {
+	which_button = get_mouse_button(KEY2TERMCAP1(c), &is_click, &is_drag);
+	if (is_drag)
+	{
+	    /* If the next character is the same mouse event then use that
+	     * one. Speeds up dragging the status line. */
+	    if (vpeekc() != NUL)
+	    {
+		int nc;
+		int save_mouse_row = mouse_row;
+		int save_mouse_col = mouse_col;
+
+		/* Need to get the character, peeking doesn't get the actual
+		 * one. */
+		nc = safe_vgetc();
+		if (c == nc)
+		    continue;
+		vungetc(nc);
+		mouse_row = save_mouse_row;
+		mouse_col = save_mouse_col;
+	    }
+	}
+	break;
+    }
 
 #ifdef FEAT_MOUSESHAPE
     /* May have stopped dragging the status or separator line.  The pointer is
diff --git a/src/proto/misc1.pro b/src/proto/misc1.pro
index d362e9cca..035453569 100644
--- a/src/proto/misc1.pro
+++ b/src/proto/misc1.pro
@@ -42,6 +42,7 @@ void unchanged __ARGS((buf_T *buf, int ff));
 void check_status __ARGS((buf_T *buf));
 void change_warning __ARGS((int col));
 int ask_yesno __ARGS((char_u *str, int direct));
+int is_mouse_key __ARGS((int c));
 int get_keystroke __ARGS((void));
 int get_number __ARGS((int colon, int *mouse_used));
 int prompt_for_number __ARGS((int *mouse_used));
diff --git a/src/version.c b/src/version.c
index cf24d39aa..00024e359 100644
--- a/src/version.c
+++ b/src/version.c
@@ -729,6 +729,8 @@ static char *(features[]) =
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    862,
+/**/
     861,
 /**/
     860,