From e325ea1616e166fe91f325a0034aa47cd230c480 Mon Sep 17 00:00:00 2001
From: Mitchell Hashimoto <mitchell.hashimoto@gmail.com>
Date: Sun, 26 Jun 2022 17:37:08 -0700
Subject: [PATCH] parse more SGR attrs

---
 src/Grid.zig              |  2 ++
 src/terminal/Screen.zig   |  6 ++++++
 src/terminal/Terminal.zig |  5 +++++
 src/terminal/sgr.zig      | 20 ++++++++++++++++++++
 4 files changed, 33 insertions(+)

diff --git a/src/Grid.zig b/src/Grid.zig
index 628ea2884..7aa84620f 100644
--- a/src/Grid.zig
+++ b/src/Grid.zig
@@ -280,6 +280,8 @@ pub fn updateCells(self: *Grid, term: Terminal) !void {
         defer y += 1;
 
         for (line) |cell, x| {
+            // TODO: inverse
+
             // If the cell has a background, we always draw it.
             if (cell.bg) |rgb| {
                 self.cells.appendAssumeCapacity(.{
diff --git a/src/terminal/Screen.zig b/src/terminal/Screen.zig
index ecb7a785b..920ad1335 100644
--- a/src/terminal/Screen.zig
+++ b/src/terminal/Screen.zig
@@ -20,6 +20,12 @@ pub const Cell = struct {
     fg: ?color.RGB = null,
     bg: ?color.RGB = null,
 
+    /// On/off attributes that can be set
+    /// TODO: pack it
+    attrs: struct {
+        inverse: u1 = 0,
+    } = .{},
+
     /// True if the cell should be skipped for drawing
     pub fn empty(self: Cell) bool {
         return self.char == 0;
diff --git a/src/terminal/Terminal.zig b/src/terminal/Terminal.zig
index 4596cdb4b..8e20ea1c5 100644
--- a/src/terminal/Terminal.zig
+++ b/src/terminal/Terminal.zig
@@ -147,6 +147,11 @@ pub fn setAttribute(self: *Terminal, attr: sgr.Attribute) !void {
         .unset => {
             self.cursor.pen.fg = null;
             self.cursor.pen.bg = null;
+            self.cursor.pen.attrs = .{};
+        },
+
+        .inverse => {
+            self.cursor.pen.attrs.inverse = 1;
         },
 
         .direct_color_fg => |rgb| {
diff --git a/src/terminal/sgr.zig b/src/terminal/sgr.zig
index cdd152656..b85c87fce 100644
--- a/src/terminal/sgr.zig
+++ b/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 } };