feat: add libvaxis renderer

src/renderer/vaxis/Cell.zig

@@ -0,0 +1,51 @@
+const vaxis = @import("vaxis");
+const Style = @import("theme").Style;
+
+const Cell = @This();
+
+cell: vaxis.Cell = .{},
+
+pub inline fn set_style(self: *Cell, style_: Style) void {
+    if (style_.fg) |fg| self.cell.style.fg = vaxis.Cell.Color.rgbFromUint(fg);
+    if (style_.bg) |bg| self.cell.style.bg = vaxis.Cell.Color.rgbFromUint(bg);
+    if (style_.fs) |fs| {
+        self.cell.style.ul = .default;
+        self.cell.style.ul_style = .off;
+        self.cell.style.bold = false;
+        self.cell.style.dim = false;
+        self.cell.style.italic = false;
+        self.cell.style.blink = false;
+        self.cell.style.reverse = false;
+        self.cell.style.invisible = false;
+        self.cell.style.strikethrough = false;
+
+        switch (fs) {
+            .normal => {},
+            .bold => self.cell.style.bold = true,
+            .italic => self.cell.style.italic = false,
+            .underline => self.cell.style.ul_style = .single,
+            .undercurl => self.cell.style.ul_style = .curly,
+            .strikethrough => self.cell.style.strikethrough = true,
+        }
+    }
+}
+
+pub inline fn set_style_fg(self: *Cell, style_: Style) void {
+    if (style_.fg) |fg| self.cell.style.fg = vaxis.Cell.Color.rgbFromUint(fg);
+}
+
+pub inline fn set_style_bg(self: *Cell, style_: Style) void {
+    if (style_.bg) |bg| self.cell.style.bg = vaxis.Cell.Color.rgbFromUint(bg);
+}
+
+pub inline fn set_fg_rgb(self: *Cell, arg_rgb: c_uint) !void {
+    self.cell.style.fg = vaxis.Cell.Color.rgbFromUint(@intCast(arg_rgb));
+}
+pub inline fn set_bg_rgb(self: *Cell, arg_rgb: c_uint) !void {
+    self.cell.style.bg = vaxis.Cell.Color.rgbFromUint(@intCast(arg_rgb));
+}
+
+pub fn columns(self: *const Cell) usize {
+    // return if (self.cell.char.width == 0) self.window.gwidth(self.cell.char.grapheme) else self.cell.char.width; // FIXME?
+    return self.cell.char.width;
+}