zig-objc/src/class.zig

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const std = @import("std");
const c = @import("c.zig");
const objc = @import("main.zig");
const MsgSend = @import("msg_send.zig").MsgSend;
pub const Class = struct {
value: c.Class,
pub usingnamespace MsgSend(Class);
/// Returns the class definition of a specified class.
pub fn getClass(name: [:0]const u8) ?Class {
return Class{
.value = c.objc_getClass(name.ptr) orelse return null,
};
}
/// Returns a property with a given name of a given class.
pub fn getProperty(self: Class, name: [:0]const u8) ?objc.Property {
return objc.Property{
.value = c.class_getProperty(self.value, name.ptr) orelse return null,
};
}
/// Describes the properties declared by a class. This must be freed.
pub fn copyPropertyList(self: Class) []objc.Property {
var count: c_uint = undefined;
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const list = @as([*c]objc.Property, @ptrCast(c.class_copyPropertyList(self.value, &count)));
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if (count == 0) return list[0..0];
return list[0..count];
}
};
test "getClass" {
const testing = std.testing;
const NSObject = Class.getClass("NSObject");
try testing.expect(NSObject != null);
try testing.expect(Class.getClass("NoWay") == null);
}
test "msgSend" {
const testing = std.testing;
const NSObject = Class.getClass("NSObject").?;
// Should work with primitives
const id = NSObject.msgSend(c.id, objc.Sel.registerName("alloc"), .{});
try testing.expect(id != null);
{
const obj: objc.Object = .{ .value = id };
obj.msgSend(void, objc.sel("dealloc"), .{});
}
// Should work with our wrappers
const obj = NSObject.msgSend(objc.Object, objc.Sel.registerName("alloc"), .{});
try testing.expect(obj.value != null);
obj.msgSend(void, objc.sel("dealloc"), .{});
}
test "getProperty" {
const testing = std.testing;
const NSObject = Class.getClass("NSObject").?;
try testing.expect(NSObject.getProperty("className") != null);
try testing.expect(NSObject.getProperty("nope") == null);
}
test "copyProperyList" {
const testing = std.testing;
const NSObject = Class.getClass("NSObject").?;
const list = NSObject.copyPropertyList();
defer objc.free(list);
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try testing.expect(list.len > 0);
}