feat: dark mode support toggle

.tool-versions

@@ -0,0 +1 @@
+zig 0.11.0

README.org

@@ -1,5 +1,5 @@
 #+DATE: 2023-10-21T12:09:48+0800
-#+LASTMOD: 2023-11-09T22:26:31+0800
+#+LASTMOD: 2023-11-10T21:49:29+0800
 #+TYPE: docs
 
 * Zigcli
@@ -24,7 +24,7 @@ This package provides:
   - =repeat=, repeat a command until it succeeds.
   - =pidof=, like [[https://man7.org/linux/man-pages/man1/pidof.1.html][pidof]], but for macOS.
   - =night-shift=, control [[https://support.apple.com/guide/mac-help/use-night-shift-mchl97bc676d/mac][Night Shift]] in macOS.
-  - =dark-mode=, Get dark mode status in macOS.
+  - =dark-mode=, control dark mode in macOS.
 
 * Install
 ** Programs

build.zig

@@ -199,7 +199,8 @@ fn makeCompileStep(
         exe.linkFramework("CoreBrightness");
     } else if (std.mem.eql(u8, name, "dark-mode")) {
         exe.linkSystemLibrary("objc");
-        exe.linkFramework("AppKit");
+        exe.addFrameworkPath(.{ .path = "/System/Library/PrivateFrameworks" });
+        exe.linkFramework("SkyLight");
     }
     return exe;
 }

docs/content/docs/programs/dark-mode.org

@@ -1,2 +1,17 @@
 * Dark mode
 Get dark mode status for macOS.
+#+begin_src bash
+ $ dark-mode -h
+ USAGE:
+     dark-mode [OPTIONS] [--] <command>
+
+ Available commands:
+   status                   View dark mode status
+   on                       Turn dark mode on
+   off                      Turn dark mode off
+   toggle                   Toggle dark mode
+
+ OPTIONS:
+	-v, --version                     Print version
+	-h, --help                        Print help information
+#+end_src

src/bin/dark-mode.zig

@@ -1,31 +1,84 @@
 //! Dark mode status, built for macOS.
 //!
 const std = @import("std");
+const simargs = @import("simargs");
+const util = @import("util.zig");
 const c = @cImport({
     @cInclude("objc/objc.h");
     @cInclude("objc/message.h");
 });
 
-// https://developer.apple.com/documentation/appkit/nsappearancenamedarkaqua
-const darkValue = "NSAppearanceNameDarkAqua";
+// https://saagarjha.com/blog/2018/12/01/scheduling-dark-mode/
+extern "c" fn SLSSetAppearanceThemeLegacy(bool) void;
+extern "c" fn SLSGetAppearanceThemeLegacy() bool;
+
+const Command = enum {
+    Status,
+    On,
+    Off,
+    Toggle,
+
+    const FromString = std.ComptimeStringMap(@This(), .{
+        .{ "status", .Status },
+        .{ "on", .On },
+        .{ "off", .Off },
+        .{ "toggle", .Toggle },
+    });
+};
 
 pub fn main() !void {
-    const clazz = c.objc_getClass("NSAppearance");
-
-    const appearanceName = blk: {
-        const call: *fn (c.id, c.SEL) callconv(.C) c.id = @constCast(@ptrCast(&c.objc_msgSend));
-        const appearance = call(@alignCast(@ptrCast(clazz.?)), c.sel_registerName("currentDrawingAppearance"));
-        break :blk call(appearance, c.sel_registerName("name"));
-    };
-
-    const appearanceValue = blk: {
-        const call: *fn (c.id, c.SEL) callconv(.C) [*c]const u8 = @constCast(@ptrCast(&c.objc_msgSend));
-        break :blk call(appearanceName, c.sel_registerName("UTF8String"));
-    };
-
-    if (std.mem.eql(u8, darkValue, std.mem.span(appearanceValue.?))) {
-        std.debug.print("on", .{});
-    } else {
-        std.debug.print("off", .{});
+    var arena = std.heap.ArenaAllocator.init(std.heap.page_allocator);
+    defer arena.deinit();
+    const allocator = arena.allocator();
+
+    const opt = try simargs.parse(allocator, struct {
+        version: bool = false,
+        help: bool = false,
+
+        pub const __shorts__ = .{
+            .version = .v,
+            .help = .h,
+        };
+
+        pub const __messages__ = .{
+            .help = "Print help information",
+            .version = "Print version",
+        };
+    },
+        \\<command>
+        \\
+        \\ Available commands:
+        \\   status                   View dark mode status
+        \\   on                       Turn dark mode on
+        \\   off                      Turn dark mode off
+        \\   toggle                   Toggle dark mode
+    , util.get_build_info());
+    defer opt.deinit();
+
+    var args_iter = util.SliceIter([]const u8).init(opt.positional_args.items);
+    const cmd: Command = if (args_iter.next()) |v|
+        Command.FromString.get(v) orelse return error.UnknownCommand
+    else
+        .Status;
+
+    switch (cmd) {
+        .Status => {
+            const is_dark = SLSGetAppearanceThemeLegacy();
+            if (is_dark) {
+                std.debug.print("on", .{});
+            } else {
+                std.debug.print("off", .{});
+            }
+        },
+        .On => {
+            SLSSetAppearanceThemeLegacy(true);
+        },
+        .Off => {
+            SLSSetAppearanceThemeLegacy(false);
+        },
+        .Toggle => {
+            const is_dark = SLSGetAppearanceThemeLegacy();
+            SLSSetAppearanceThemeLegacy(!is_dark);
+        },
     }
 }