TUI: implement "standout" attribute #8081

closes #8054

src/nvim/tui/tui.c

@@ -450,7 +450,8 @@ static void update_attrs(UI *ui, HlAttrs attrs)
   int attr = ui->rgb ? attrs.rgb_ae_attr : attrs.cterm_ae_attr;
   bool bold = attr & HL_BOLD;
   bool italic = attr & HL_ITALIC;
-  bool reverse = attr & (HL_INVERSE | HL_STANDOUT);
+  bool reverse = attr & HL_INVERSE;
+  bool standout = attr & HL_STANDOUT;
   bool underline = attr & (HL_UNDERLINE), undercurl = attr & (HL_UNDERCURL);
 
   if (unibi_get_str(data->ut, unibi_set_attributes)) {
@@ -478,6 +479,9 @@ static void update_attrs(UI *ui, HlAttrs attrs)
     if (underline || undercurl) {
       unibi_out(ui, unibi_enter_underline_mode);
     }
+    if (standout) {
+      unibi_out(ui, unibi_enter_standout_mode);
+    }
     if (reverse) {
       unibi_out(ui, unibi_enter_reverse_mode);
     }

src/nvim/ui.c

@@ -186,6 +186,10 @@ Dictionary hlattrs2dict(const HlAttrs *aep, bool use_rgb)
     PUT(hl, "bold", BOOLEAN_OBJ(true));
   }
 
+  if (mask & HL_STANDOUT) {
+    PUT(hl, "standout", BOOLEAN_OBJ(true));
+  }
+
   if (mask & HL_UNDERLINE) {
     PUT(hl, "underline", BOOLEAN_OBJ(true));
   }
@@ -198,7 +202,7 @@ Dictionary hlattrs2dict(const HlAttrs *aep, bool use_rgb)
     PUT(hl, "italic", BOOLEAN_OBJ(true));
   }
 
-  if (mask & (HL_INVERSE | HL_STANDOUT)) {
+  if (mask & HL_INVERSE) {
     PUT(hl, "reverse", BOOLEAN_OBJ(true));
   }
 

test/functional/api/highlight_spec.lua

@@ -99,5 +99,14 @@ describe('highlight api',function()
     eq(false, err)
     eq('Invalid highlight name: ',
        string.match(emsg, 'Invalid.*'))
+
+    -- Test "standout" attribute. #8054
+    eq({ underline = true, },
+       meths.get_hl_by_name('cursorline', 0));
+    command('hi CursorLine cterm=standout,underline term=standout,underline gui=standout,underline')
+    command('set cursorline')
+    eq({ underline = true, standout = true, },
+       meths.get_hl_by_name('cursorline', 0));
+
   end)
 end)

test/functional/ui/highlight_spec.lua

@@ -312,7 +312,7 @@ describe('highlight defaults', function()
   end)
 end)
 
-describe('guisp (special/undercurl)', function()
+describe('highlight', function()
   local screen
 
   before_each(function()
@@ -321,7 +321,31 @@ describe('guisp (special/undercurl)', function()
     screen:attach()
   end)
 
-  it('can be set and is applied like foreground or background', function()
+  it('cterm=standout gui=standout', function()
+    screen:detach()
+    screen = Screen.new(20,5)
+    screen:attach()
+    screen:set_default_attr_ids({
+        [1] = {bold = true, foreground = Screen.colors.Blue1},
+        [2] = {standout = true, bold = true, underline = true,
+        background = Screen.colors.Gray90, foreground = Screen.colors.Blue1},
+        [3] = {standout = true, underline = true,
+        background = Screen.colors.Gray90}
+    })
+    feed_command('hi CursorLine cterm=standout,underline gui=standout,underline')
+    feed_command('set cursorline')
+    feed_command('set listchars=space:.,eol:¬,tab:>-,extends:>,precedes:<,trail:* list')
+    feed('i\t abcd <cr>\t abcd <cr><esc>k')
+    screen:expect([[
+    {1:>-------.}abcd{1:*¬}     |
+    {2:^>-------.}{3:abcd}{2:*¬}{3:     }|
+    {1:¬}                   |
+    {1:~                   }|
+                        |
+    ]])
+  end)
+
+  it('guisp (special/undercurl)', function()
     feed_command('syntax on')
     feed_command('syn keyword TmpKeyword neovim')
     feed_command('syn keyword TmpKeyword1 special')