patch 8.2.2493: text property for text left of window shows up

Problem:    Text property for text left of window shows up.
Solution:   Check if the text property ends before the current column.
            (closes #7806)

src/drawline.c

@@ -1418,7 +1418,12 @@ win_line(
 		// Add any text property that starts in this column.
 		while (text_prop_next < text_prop_count
 			   && bcol >= text_props[text_prop_next].tp_col - 1)
-		    text_prop_idxs[text_props_active++] = text_prop_next++;
+		{
+		    if (bcol <= text_props[text_prop_next].tp_col - 1
+					   + text_props[text_prop_next].tp_len)
+			text_prop_idxs[text_props_active++] = text_prop_next;
+		    ++text_prop_next;
+		}
 
 		text_prop_attr = 0;
 		text_prop_combine = FALSE;

src/testdir/dumps/Test_textprop_nowrap_01.dump

@@ -0,0 +1,6 @@
+>a+0&#ffffff0|l@1|e|r| |t|h|a|n| |4+0#ffffff16#e000002|5|6|7|.+0#0000000#ffffff0|X@58
+|~+0#4040ff13&| @73
+|~| @73
+|~| @73
+|~| @73
+| +0#0000000&@56|1|,|2|1| @9|A|l@1| 

src/testdir/dumps/Test_textprop_nowrap_02.dump

@@ -0,0 +1,6 @@
+|X+0&#ffffff0@36>X| @36
+|~+0#4040ff13&| @73
+|~| @73
+|~| @73
+|~| @73
+| +0#0000000&@56|1|,|1@2| @8|A|l@1| 

src/testdir/test_textprop.vim

@@ -1049,6 +1049,30 @@ func Test_textprop_after_tab()
   call delete('XtestPropTab')
 endfunc
 
+func Test_textprop_nowrap_scrolled()
+  CheckScreendump
+
+  let lines =<< trim END
+       vim9script
+       set nowrap
+       setline(1, 'The number 123 is smaller than 4567.' .. repeat('X', &columns))
+       prop_type_add('number', {'highlight': 'ErrorMsg'})
+       prop_add(1, 12, {'length': 3, 'type': 'number'})
+       prop_add(1, 32, {'length': 4, 'type': 'number'})
+       feedkeys('gg20zl', 'nxt')
+  END
+  call writefile(lines, 'XtestNowrap')
+  let buf = RunVimInTerminal('-S XtestNowrap', {'rows': 6})
+  call VerifyScreenDump(buf, 'Test_textprop_nowrap_01', {})
+
+  call term_sendkeys(buf, "$")
+  call VerifyScreenDump(buf, 'Test_textprop_nowrap_02', {})
+
+  " clean up
+  call StopVimInTerminal(buf)
+  call delete('XtestNowrap')
+endfunc
+
 func Test_textprop_with_syntax()
   CheckScreendump
 

src/version.c

@@ -750,6 +750,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    2493,
 /**/
     2492,
 /**/