config: add text-blink option to opt out of text blinking

src/config/Config.zig

@@ -346,6 +346,13 @@ foreground: Color = .{ .r = 0xFF, .g = 0xFF, .b = 0xFF },
 /// This value does not apply to Emoji or images.
 @"minimum-contrast": f64 = 1,
 
+/// Whether to enable blinking text.
+/// Text can be made to blink via a SGR sequence, which is synchronized with
+/// cursor blinking when that is enabled. Text blinking and cursor blinking
+/// can be independently toggled on or off without interfering with each other:
+/// to adjust cursor blinking settings, see `cursor-style-blink`.
+@"text-blink": bool = true,
+
 /// Color palette for the 256 color form that many terminal applications use.
 /// The syntax of this configuration is `N=HEXCODE` where `N` is 0 to 255 (for
 /// the 256 colors in the terminal color table) and `HEXCODE` is a typical RGB

src/renderer/Thread.zig

@@ -93,7 +93,7 @@ flags: packed struct {
     /// This is true when blinking text should be visible and false
     /// when it should not be visible. This is toggled on a timer by the
     /// thread automatically.
-    blink_visible: bool = false,
+    blink_visible: bool = true,
 
     /// Whether the cursor should be forced into staying visible regardless
     /// of blinking. Used when the user is typing.
@@ -109,10 +109,12 @@ flags: packed struct {
 
 pub const DerivedConfig = struct {
     custom_shader_animation: configpkg.CustomShaderAnimation,
+    text_blink: bool,
 
     pub fn init(config: *const configpkg.Config) DerivedConfig {
         return .{
             .custom_shader_animation = config.@"custom-shader-animation",
+            .text_blink = config.@"text-blink",
         };
     }
 };
@@ -547,7 +549,7 @@ fn renderCallback(
     t.renderer.updateFrame(
         t.surface,
         t.state,
-        t.flags.blink_visible,
+        !t.config.text_blink or t.flags.blink_visible,
         t.flags.cursor_always_visible or t.flags.blink_visible,
     ) catch |err|
         log.warn("error rendering err={}", .{err});