patch 8.1.2156: first character after Tab is not highlighted

Problem:    First character after Tab is not highlighted.
Solution:   Remember the syntax attribute for a column.

diff --git a/src/drawline.c b/src/drawline.c
index 1f02eef2a492bb708fcb21bc88e56389aa3b37b6..15761bf22a6f11b41ad39ec4109bae89a65f0017 100644 (file)
--- a/src/drawline.c
+++ b/src/drawline.c
@@ -289,6 +289,8 @@ win_line(
 #ifdef FEAT_SYN_HL
     int                vcol_save_attr = 0;     // saved attr for 'cursorcolumn'
     int                syntax_attr = 0;        // attributes desired by syntax
+    int                prev_syntax_col = -1;   // column of prev_syntax_attr
+    int                prev_syntax_attr = 0;   // syntax_attr at prev_syntax_col
     int                has_syntax = FALSE;     // this buffer has syntax highl.
     int                save_did_emsg;
     int                draw_color_col = FALSE; // highlight colorcolumn
@@ -1414,12 +1416,20 @@ win_line(
                    did_emsg = FALSE;
 
                    v = (long)(ptr - line);
-                   can_spell = TRUE;
-                   syntax_attr = get_syntax_attr((colnr_T)v,
+                   if (v == prev_syntax_col)
+                       // at same column again
+                       syntax_attr = prev_syntax_attr;
+                   else
+                   {
+                       can_spell = TRUE;
+                       syntax_attr = get_syntax_attr((colnr_T)v,
 # ifdef FEAT_SPELL
                                                has_spell ? &can_spell :
 # endif
                                                NULL, FALSE);
+                       prev_syntax_col = v;
+                       prev_syntax_attr = syntax_attr;
+                   }
 
                    // combine syntax attribute with 'wincolor'
                    if (syntax_attr != 0 && win_attr != 0)

diff --git a/src/testdir/dumps/Test_syntax_c_01.dump b/src/testdir/dumps/Test_syntax_c_01.dump
index 2fea5d61574e872344e47a0689e24dd171bcd0c4..54e34a60359dd8a36c94bc0dbd675689679b6c24 100644 (file)
--- a/src/testdir/dumps/Test_syntax_c_01.dump
+++ b/src/testdir/dumps/Test_syntax_c_01.dump
@@ -12,9 +12,9 @@
 |}| @73
 @3|s+0#00e0003&|t|a|t|i|c| +0#0000000&|v+0#00e0003&|o|i|d| +0#0000000&@60
 |m|y|F|u|n|c|t|i|o|n|(|c+0#00e0003&|o|n|s|t| +0#0000000&|d+0#00e0003&|o|u|b|l|e| +0#0000000&|c|o|u|n|t|,| |s+0#00e0003&|t|r|u|c|t| +0#0000000&|n|o|t|h|i|n|g|,| |l+0#00e0003&|o|n|g| +0#0000000&|t|h|e|r|e|)| |{| @14
-@2|/+0#0000e05&@1| |1+0#e000002&|2|3|:+0#0000e05&| |n|o|t|h|i|n|g| |t|o| |r|e|a|d| |h|e|r|e| +0#0000000&@44
-@2|f+0#af5f00255&|o|r| +0#0000000&|(|i+0#00e0003&|n|t| +0#0000000&|i| |=| |0+0#e000002&|;+0#0000000&| |i| |<| |c|o|u|n|t|;| |+@1|i|)| |{| @39
-@4|b+0#af5f00255&|r|e|a|k|;+0#0000000&| @64
-@2|}| @71
+@1| +0#0000e05&@6|/@1| |1+0#e000002&|2|3|:+0#0000e05&| |n|o|t|h|i|n|g| |t|o| |r|e|a|d| |h|e|r|e| +0#0000000&@38
+@1| +0#af5f00255&@6|f|o|r| +0#0000000&|(|i+0#00e0003&|n|t| +0#0000000&|i| |=| |0+0#e000002&|;+0#0000000&| |i| |<| |c|o|u|n|t|;| |+@1|i|)| |{| @33
+@11|b+0#af5f00255&|r|e|a|k|;+0#0000000&| @57
+@8|}| @65
 |}| @73
-|"|X|t|e|s|t|.|c|"| |1|9|L|,| |3|6|4|C| @37|1|,|1| @10|A|l@1| 
+|"|X|t|e|s|t|.|c|"| |1|9|L|,| |3|6|1|C| @37|1|,|1| @10|A|l@1| 

diff --git a/src/testdir/test_syntax.vim b/src/testdir/test_syntax.vim
index 0479901ce0e1464a029ddaedb58f760a26c4687e..c7d6f2db85f80dc5b42a381aabc3a528138b3ada 100644 (file)
--- a/src/testdir/test_syntax.vim
+++ b/src/testdir/test_syntax.vim
@@ -551,10 +551,10 @@ func Test_syntax_c()
        \ '}',
        \ '   static void',
        \ 'myFunction(const double count, struct nothing, long there) {',
-       \ '  // 123: nothing to read here',
-       \ '  for (int i = 0; i < count; ++i) {',
-       \ '    break;',
-       \ '  }',
+       \ "\t// 123: nothing to read here",
+       \ "\tfor (int i = 0; i < count; ++i) {",
+       \ "\t   break;",
+       \ "\t}",
        \ '}',
        \ ], 'Xtest.c')
  

diff --git a/src/version.c b/src/version.c
index 6de34d471299ced92a25bc5484a45819ac8afffc..573b5ccda57225f03cb4d706b58ea4739caa1017 100644 (file)
--- a/src/version.c
+++ b/src/version.c
@@ -753,6 +753,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    2156,
 /**/
     2155,
 /**/