updated for version 7.4.314

Problem:    Completion messages can get in the way of a plugin.
Solution:   Add 'c' flag to 'shortmess' option. (Shougo Matsu)

runtime/doc/options.txt

@@ -6254,6 +6254,9 @@ A jump table for the options with a short description can be found at |Q_op|.
 	  A	don't give the "ATTENTION" message when an existing swap file
 		is found.
 	  I	don't give the intro message when starting Vim |:intro|.
+	  c	don't give |ins-completion-menu| messages.  For example,
+		"-- XXX completion (YYY)", "match 1 of 2", "The only match",
+		"Pattern not found", "Back at original", etc.
 
 	This gives you the opportunity to avoid that a change between buffers
 	requires you to hit <Enter>, but still gives as useful a message as

src/edit.c

@@ -3854,7 +3854,8 @@ ins_compl_prep(c)
 	    ins_compl_free();
 	    compl_started = FALSE;
 	    compl_matches = 0;
-	    msg_clr_cmdline();		/* necessary for "noshowmode" */
+	    if (!shortmess(SHM_COMPLETIONMENU))
+		msg_clr_cmdline();	/* necessary for "noshowmode" */
 	    ctrl_x_mode = 0;
 	    compl_enter_selects = FALSE;
 	    if (edit_submode != NULL)
@@ -5285,7 +5286,8 @@ ins_complete(c)
 	    {
 		ctrl_x_mode = 0;
 		edit_submode = NULL;
-		msg_clr_cmdline();
+		if (!shortmess(SHM_COMPLETIONMENU))
+		    msg_clr_cmdline();
 		return FAIL;
 	    }
 
@@ -5544,15 +5546,18 @@ ins_complete(c)
 
     /* Show a message about what (completion) mode we're in. */
     showmode();
-    if (edit_submode_extra != NULL)
+    if (!shortmess(SHM_COMPLETIONMENU))
     {
-	if (!p_smd)
-	    msg_attr(edit_submode_extra,
-		    edit_submode_highl < HLF_COUNT
-		    ? hl_attr(edit_submode_highl) : 0);
+	if (edit_submode_extra != NULL)
+	{
+	    if (!p_smd)
+		msg_attr(edit_submode_extra,
+			edit_submode_highl < HLF_COUNT
+			? hl_attr(edit_submode_highl) : 0);
+	}
+	else
+	    msg_clr_cmdline();	/* necessary for "noshowmode" */
     }
-    else
-	msg_clr_cmdline();	/* necessary for "noshowmode" */
 
     /* Show the popup menu, unless we got interrupted. */
     if (!compl_interrupted)

src/option.h

@@ -212,7 +212,8 @@
 #define SHM_SEARCH	's'		/* no search hit bottom messages */
 #define SHM_ATTENTION	'A'		/* no ATTENTION messages */
 #define SHM_INTRO	'I'		/* intro messages */
-#define SHM_ALL		"rmfixlnwaWtToOsAI" /* all possible flags for 'shm' */
+#define SHM_COMPLETIONMENU  'c'		/* completion menu messages */
+#define SHM_ALL		"rmfixlnwaWtToOsAIc" /* all possible flags for 'shm' */
 
 /* characters for p_go: */
 #define GO_ASEL		'a'		/* autoselect */

src/screen.c

@@ -42,7 +42,7 @@
  *
  * The part of the buffer that is displayed in a window is set with:
  * - w_topline (first buffer line in window)
- * - w_topfill (filler line above the first line)
+ * - w_topfill (filler lines above the first line)
  * - w_leftcol (leftmost window cell in window),
  * - w_skipcol (skipped window cells of first line)
  *
@@ -9683,7 +9683,8 @@ showmode()
 	    }
 #endif
 #ifdef FEAT_INS_EXPAND
-	    if (edit_submode != NULL)		/* CTRL-X in Insert mode */
+	    /* CTRL-X in Insert mode */
+	    if (edit_submode != NULL && !shortmess(SHM_COMPLETIONMENU))
 	    {
 		/* These messages can get long, avoid a wrap in a narrow
 		 * window.  Prefer showing edit_submode_extra. */

src/version.c

@@ -734,6 +734,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    314,
 /**/
     313,
 /**/