From fa25d250c66466a0f0d5bb1f71b650fb232dd10d Mon Sep 17 00:00:00 2001
From: CJ van den Berg <cj@vdbonline.com>
Date: Thu, 12 Dec 2024 19:11:54 +0100
Subject: [PATCH] fix: improve alpha rendering on gutter

---
 src/renderer/vaxis/Plane.zig | 6 ++++++
 src/tui/editor_gutter.zig    | 9 ++++++---
 2 files changed, 12 insertions(+), 3 deletions(-)

diff --git a/src/renderer/vaxis/Plane.zig b/src/renderer/vaxis/Plane.zig
index 09671a2..b778f2e 100644
--- a/src/renderer/vaxis/Plane.zig
+++ b/src/renderer/vaxis/Plane.zig
@@ -114,6 +114,12 @@ pub fn home(self: *Plane) void {
     self.col = 0;
 }
 
+pub fn fill(self: *Plane, egc: []const u8) void {
+    for (0..self.dim_y()) |y|
+        for (0..self.dim_x()) |x|
+            self.write_cell(x, y, egc);
+}
+
 pub fn fill_width(self: *Plane, comptime fmt: anytype, args: anytype) !usize {
     var buf: [fmt.len + 4096]u8 = undefined;
     var pos: usize = 0;
diff --git a/src/tui/editor_gutter.zig b/src/tui/editor_gutter.zig
index a7a0e86..2f9b6ae 100644
--- a/src/tui/editor_gutter.zig
+++ b/src/tui/editor_gutter.zig
@@ -121,8 +121,11 @@ inline fn get_width(self: *Self) usize {
 pub fn render(self: *Self, theme: *const Widget.Theme) bool {
     const frame = tracy.initZone(@src(), .{ .name = "gutter render" });
     defer frame.deinit();
-    self.plane.set_base_style(theme.editor_gutter);
+    self.plane.set_base_style(theme.editor);
     self.plane.erase();
+    self.plane.home();
+    self.plane.set_style(theme.editor_gutter);
+    _ = self.plane.fill(" ");
     if (self.linenum) {
         const relative = self.relative or if (tui.current().input_mode) |mode| mode.line_numbers == .relative else false;
         if (relative)
@@ -160,10 +163,10 @@ pub fn render_linear(self: *Self, theme: *const Widget.Theme) void {
     while (rows > 0) : (rows -= 1) {
         if (linenum > self.lines) return;
         if (linenum == self.line + 1) {
-            self.plane.set_style(theme.editor_gutter_active);
+            self.plane.set_style(.{ .fg = theme.editor_gutter_active.fg });
             self.plane.on_styles(style.bold);
         } else {
-            self.plane.set_style(theme.editor_gutter);
+            self.plane.set_style(.{ .fg = theme.editor_gutter.fg });
             self.plane.off_styles(style.bold);
         }
         _ = self.plane.print_aligned_right(@intCast(pos), "{s}", .{std.fmt.bufPrintZ(&buf, "{d} ", .{linenum}) catch return}) catch {};