For conceal mode: when two different syntax items follow each other, show the

replacement character for both.

3 files changed, 29 insertions, 18 deletions

diff --git a/src/proto/syntax.pro b/src/proto/syntax.pro
index b2d63fdd7..12dc9dec3 100644
--- a/src/proto/syntax.pro
+++ b/src/proto/syntax.pro
@@ -4,7 +4,7 @@ void syn_stack_free_all __ARGS((synblock_T *block));
 void syn_stack_apply_changes __ARGS((buf_T *buf));
 void syntax_end_parsing __ARGS((linenr_T lnum));
 int syntax_check_changed __ARGS((linenr_T lnum));
-int get_syntax_attr __ARGS((colnr_T col, int *p_flags, int *can_spell, int keep_state));
+int get_syntax_attr __ARGS((colnr_T col, int *can_spell, int keep_state));
 void syntax_clear __ARGS((synblock_T *block));
 void reset_synblock __ARGS((win_T *wp));
 void ex_syntax __ARGS((exarg_T *eap));
@@ -15,6 +15,7 @@ void set_context_in_echohl_cmd __ARGS((expand_T *xp, char_u *arg));
 void set_context_in_syntax_cmd __ARGS((expand_T *xp, char_u *arg));
 char_u *get_syntax_name __ARGS((expand_T *xp, int idx));
 int syn_get_id __ARGS((win_T *wp, long lnum, colnr_T col, int trans, int *spellp, int keep_state));
+int get_syntax_info __ARGS((int *idp));
 int syn_get_sub_char __ARGS((void));
 int syn_get_stack_item __ARGS((int i));
 int syn_get_foldlevel __ARGS((win_T *wp, long lnum));
diff --git a/src/screen.c b/src/screen.c
index 69df0b2cd..71eb16fca 100644
--- a/src/screen.c
+++ b/src/screen.c
@@ -2775,8 +2775,9 @@ win_line(wp, lnum, startrow, endrow, nochange)
 
 #ifdef FEAT_CONCEAL
     int		syntax_flags	= 0;
+    int		syntax_id	= 0;
+    int		prev_syntax_id	= 0;
     int		conceal_attr	= hl_attr(HLF_CONCEAL);
-    int		first_conceal	= (wp->w_p_conc != 3);
     int		is_concealing	= FALSE;
     int		boguscols	= 0;	/* nonexistent columns added to force
 					   wrapping */
@@ -4028,11 +4029,6 @@ win_line(wp, lnum, startrow, endrow, nochange)
 		    did_emsg = FALSE;
 
 		    syntax_attr = get_syntax_attr((colnr_T)v - 1,
-# ifdef FEAT_CONCEAL
-						&syntax_flags,
-# else
-						NULL,
-# endif
 # ifdef FEAT_SPELL
 						has_spell ? &can_spell :
 # endif
@@ -4060,6 +4056,8 @@ win_line(wp, lnum, startrow, endrow, nochange)
 		     * with line highlighting */
 		    if (c == NUL)
 			syntax_flags = 0;
+		    else
+			syntax_flags = get_syntax_info(&syntax_id);
 # endif
 		}
 #endif
@@ -4388,9 +4386,12 @@ win_line(wp, lnum, startrow, endrow, nochange)
 		&& (syntax_flags & HL_CONCEAL) != 0)
 	    {
 		char_attr = conceal_attr;
-		if (first_conceal
-			&& (syn_get_sub_char() != NUL || wp->w_p_conc == 1))
+		if (prev_syntax_id != syntax_id
+			&& (syn_get_sub_char() != NUL || wp->w_p_conc == 1)
+			&& wp->w_p_conc != 3)
 		{
+		    /* First time at this concealed item: display one
+		     * character. */
 		    if (syn_get_sub_char() != NUL)
 			c = syn_get_sub_char();
 		    else if (lcs_conceal != NUL)
@@ -4398,7 +4399,7 @@ win_line(wp, lnum, startrow, endrow, nochange)
 		    else
 			c = ' ';
 
-		    first_conceal = FALSE;
+		    prev_syntax_id = syntax_id;
 
 		    if (n_extra > 0)
 			vcol_off += n_extra;
@@ -4440,7 +4441,7 @@ win_line(wp, lnum, startrow, endrow, nochange)
 	    }
 	    else
 	    {
-		first_conceal = (wp->w_p_conc != 3);
+		prev_syntax_id = 0;
 		is_concealing = FALSE;
 	    }
 #endif /* FEAT_CONCEAL */
diff --git a/src/syntax.c b/src/syntax.c
index c54984c97..588080364 100644
--- a/src/syntax.c
+++ b/src/syntax.c
@@ -1755,9 +1755,8 @@ syn_finish_line(syncing)
  * done.
  */
     int
-get_syntax_attr(col, p_flags, can_spell, keep_state)
+get_syntax_attr(col, can_spell, keep_state)
     colnr_T	col;
-    int		*p_flags UNUSED;
     int		*can_spell;
     int		keep_state;	/* keep state of char at "col" */
 {
@@ -1799,10 +1798,6 @@ get_syntax_attr(col, p_flags, can_spell, keep_state)
 	++current_col;
     }
 
-#ifdef FEAT_CONCEAL
-    if (p_flags != NULL)
-	*p_flags = current_flags;
-#endif
     return attr;
 }
 
@@ -6332,13 +6327,27 @@ syn_get_id(wp, lnum, col, trans, spellp, keep_state)
 	    || col < current_col)
 	syntax_start(wp, lnum);
 
-    (void)get_syntax_attr(col, NULL, spellp, keep_state);
+    (void)get_syntax_attr(col, spellp, keep_state);
 
     return (trans ? current_trans_id : current_id);
 }
 
 #if defined(FEAT_CONCEAL) || defined(PROTO)
 /*
+ * Get extra information about the syntax item.  Must be called right after
+ * get_syntax_attr().
+ * Stores the current item ID in "*idp".
+ * Returns the current flags.
+ */
+    int
+get_syntax_info(idp)
+    int		*idp;
+{
+    *idp = current_id;
+    return current_flags;
+}
+
+/*
  * Return conceal substitution character
  */
     int