patch 8.1.0665: text property display wrong when 'spell' is set

Problem:    Text property display wrong when 'spell' is set. (Dominique Pelle)
Solution:   Remove unnecessary assignment to char_attr.  Combine attributes if
            needed.  Add a screenshot test.

src/screen.c

@@ -3051,6 +3051,38 @@ fill_foldcolumn(
 }
 #endif /* FEAT_FOLDING */
 
+#ifdef FEAT_TEXT_PROP
+static textprop_T	*current_text_props = NULL;
+static buf_T		*current_buf = NULL;
+
+    static int
+#ifdef __BORLANDC__
+_RTLENTRYF
+#endif
+text_prop_compare(const void *s1, const void *s2)
+{
+    int  idx1, idx2;
+    proptype_T  *pt1, *pt2;
+    colnr_T col1, col2;
+
+    idx1 = *(int *)s1;
+    idx2 = *(int *)s2;
+    pt1 = text_prop_type_by_id(current_buf, current_text_props[idx1].tp_type);
+    pt2 = text_prop_type_by_id(current_buf, current_text_props[idx2].tp_type);
+    if (pt1 == pt2)
+	return 0;
+    if (pt1 == NULL)
+	return -1;
+    if (pt2 == NULL)
+	return 1;
+    if (pt1->pt_priority != pt2->pt_priority)
+	return pt1->pt_priority > pt2->pt_priority ? 1 : -1;
+    col1 = current_text_props[idx1].tp_col;
+    col2 = current_text_props[idx2].tp_col;
+    return col1 == col2 ? 0 : col1 > col2 ? 1 : -1;
+}
+#endif
+
 /*
  * Display line "lnum" of window 'wp' on the screen.
  * Start at row "startrow", stop when "endrow" is reached.
@@ -4322,34 +4354,32 @@ win_line(
 			   && vcol >= text_props[text_prop_next].tp_col - 1)
 		    text_prop_idxs[text_props_active++] = text_prop_next++;
 
-		text_prop_type = NULL;
+		text_prop_attr = 0;
 		if (text_props_active > 0)
 		{
-		    int max_priority = INT_MIN;
-		    int max_col = 0;
+		    // Sort the properties on priority and/or starting last.
+		    // Then combine the attributes, highest priority last.
+		    current_text_props = text_props;
+		    current_buf = wp->w_buffer;
+		    qsort((void *)text_prop_idxs, (size_t)text_props_active,
+					       sizeof(int), text_prop_compare);
 
-		    // Get the property type with the highest priority
-		    // and/or starting last.
 		    for (pi = 0; pi < text_props_active; ++pi)
 		    {
-			int		tpi = text_prop_idxs[pi];
-			proptype_T  *pt;
+			int	    tpi = text_prop_idxs[pi];
+			proptype_T  *pt = text_prop_type_by_id(wp->w_buffer, text_props[tpi].tp_type);
 
-			pt = text_prop_type_by_id(
-				curwin->w_buffer, text_props[tpi].tp_type);
-			if (pt != NULL
-				&& (pt->pt_priority > max_priority
-				    || (pt->pt_priority == max_priority
-				    && text_props[tpi].tp_col >= max_col)))
+			if (pt != NULL)
 			{
+			    int pt_attr = syn_id2attr(pt->pt_hl_id);
+
 			    text_prop_type = pt;
-			    max_priority = pt->pt_priority;
-			    max_col = text_props[tpi].tp_col;
+			    if (text_prop_attr == 0)
+				text_prop_attr = pt_attr;
+			    else
+				text_prop_attr = hl_combine_attr(text_prop_attr, pt_attr);
 			}
 		    }
-		    if (text_prop_type != NULL)
-			text_prop_attr =
-				     syn_id2attr(text_prop_type->pt_hl_id);
 		}
 	    }
 #endif
@@ -4775,10 +4805,6 @@ win_line(
 		if (has_spell && v >= word_end && v > cur_checked_col)
 		{
 		    spell_attr = 0;
-# ifdef FEAT_SYN_HL
-		    if (!attr_pri)
-			char_attr = syntax_attr;
-# endif
 		    if (c != 0 && (
 # ifdef FEAT_SYN_HL
 				!has_syntax ||

src/testdir/dumps/Test_textprop_01.dump

@@ -0,0 +1,20 @@
+| +0#af5f00255#ffffff0@1|1| >O+0#0000000&|n|e| +0&#ffff4012|t|w|o| +0&#ffffff0@63
+| +0#af5f00255&@1|2| |N+0#0000000#ffff4012|u|m|b|e|r| |1+0#4040ff13#ffffff0|2|3| +0#0000000#ffff4012|a|n|d| |t|h|e|n| |4+0#4040ff13#ffffff0|5|6|7|.+0#0000000#ffff4012| +0&#ffffff0@45
+| +0#af5f00255&@1|3| |T+0#0000000#ffff4012|h|r|e+0&#ffffff0@1| @65
+|~+0#4040ff13&| @73
+|~| @73
+|~| @73
+|~| @73
+|~| @73
+|~| @73
+|~| @73
+|~| @73
+|~| @73
+|~| @73
+|~| @73
+|~| @73
+|~| @73
+|~| @73
+|~| @73
+|~| @73
+| +0#0000000&@56|1|,|1| @10|A|l@1| 

src/testdir/test_textprop.vim

@@ -5,6 +5,8 @@ if !has('textprop')
   finish
 endif
 
+source screendump.vim
+
 func Test_proptype_global()
   call prop_type_add('comment', {'highlight': 'Directory', 'priority': 123, 'start_incl': 1, 'end_incl': 1})
   let proptypes = prop_type_list()
@@ -283,5 +285,27 @@ func Test_prop_byteoff()
   call prop_type_delete('comment')
 endfunc
 
+" screenshot test with textprop highlighting
+funct Test_textprop_screenshots()
+  if !CanRunVimInTerminal()
+    return
+  endif
+  call writefile([
+	\ "call setline(1, ['One two', 'Number 123 and then 4567.', 'Three'])",
+	\ "hi NumberProp ctermfg=blue",
+	\ "hi LongProp ctermbg=yellow",
+	\ "call prop_type_add('number', {'highlight': 'NumberProp'})",
+	\ "call prop_type_add('long', {'highlight': 'LongProp'})",
+	\ "call prop_add(1, 4, {'end_lnum': 3, 'end_col': 3, 'type': 'long'})",
+	\ "call prop_add(2, 8, {'length': 3, 'type': 'number'})",
+	\ "call prop_add(2, 21, {'length': 4, 'type': 'number'})",
+	\ "set number",
+	\ "set spell",
+	\], 'XtestProp')
+  let buf = RunVimInTerminal('-S XtestProp', {})
+  call VerifyScreenDump(buf, 'Test_textprop_01', {})
 
-" TODO: screenshot test with highlighting
+  " clean up
+  call StopVimInTerminal(buf)
+  call delete('Xtest_folds_with_rnu')
+endfunc

src/version.c

@@ -799,6 +799,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    665,
 /**/
     664,
 /**/