parse more SGR attrs

src/terminal/sgr.zig

@@ -15,6 +15,15 @@ pub const Attribute = union(enum) {
     /// Bold the text.
     bold: void,
 
+    /// Underline the text
+    underline: void,
+
+    /// Blink the text
+    blink: void,
+
+    /// Invert fg/bg colors.
+    inverse: void,
+
     /// Set foreground color as RGB values.
     direct_color_fg: RGB,
 
@@ -68,6 +77,12 @@ pub const Parser = struct {
 
             1 => return Attribute{ .bold = {} },
 
+            4 => return Attribute{ .underline = {} },
+
+            5 => return Attribute{ .blink = {} },
+
+            7 => return Attribute{ .inverse = {} },
+
             30...37 => return Attribute{
                 .@"8_fg" = @intToEnum(color.Name, slice[0] - 30),
             },
@@ -178,6 +193,11 @@ test "sgr: bold" {
     try testing.expect(v == .bold);
 }
 
+test "sgr: inverse" {
+    const v = testParse(&[_]u16{7});
+    try testing.expect(v == .inverse);
+}
+
 test "sgr: 8 color" {
     var p: Parser = .{ .params = &[_]u16{ 31, 43, 103 } };