font/coretext: force LTR shaping

pkg/macos/text/paragraph_style.zig

@@ -34,10 +34,13 @@ pub const ParagraphStyleSpecifier = enum(c_uint) {
     base_writing_direction = 13,
 };
 
-pub const WritingDirection = enum(i8) {
+/// https://developer.apple.com/documentation/uikit/nswritingdirectionattributename?language=objc
+pub const WritingDirection = enum(c_int) {
     natural = -1,
-    left_to_right = 0,
-    right_to_left = 1,
+    ltr = 0,
+    rtl = 1,
+    lro = 2,
+    rlo = 3,
 };
 
 test ParagraphStyle {

pkg/macos/text/stylized_strings.zig

@@ -4,11 +4,13 @@ const c = @import("c.zig");
 pub const StringAttribute = enum {
     font,
     paragraph_style,
+    writing_direction,
 
     pub fn key(self: StringAttribute) *foundation.String {
         return @ptrFromInt(@intFromPtr(switch (self) {
             .font => c.kCTFontAttributeName,
             .paragraph_style => c.kCTParagraphStyleAttributeName,
+            .writing_direction => c.kCTWritingDirectionAttributeName,
         }));
     }
 };