Merge pull request tectonic-typesetting#104 from cormacrelf/objc_msgSend

use objc crate's msg_send! macro to replace placeholders

Author: crlf0710

Cargo.lock

@@ -36,5 +36,6 @@ core-foundation = "0.6.4"
 core-graphics = "0.17.3"
 core-text = "13.3.0"
 freetype-rs = "0.22.0"
-# needed for replacing XeTeXFontMgr_Mac
-# cocoa = "0.19.0"
+objc = "0.2.6"
+objc-foundation = "0.1.1"
+objc_id = "0.1.1"

engine/Cargo.toml

@@ -16,6 +16,11 @@ extern crate tectonic_dvipdfmx as dpx;
 
 pub use bridge::*;
 
+// For the msg_send macro
+#[cfg(target_os = "macos")]
+#[macro_use]
+extern crate objc;
+
 //use log::{info, warn};
 
 pub type __off_t = i64;

engine/src/lib.rs

@@ -24,9 +24,10 @@ use crate::core_memory::xmalloc;
 
 use crate::xetex_layout_interface::collection_types::*;
 
+#[cfg(target_os = "macos")]
+use crate::xetex_layout_interface::__CTFontDescriptor;
+
 extern "C" {
-    #[cfg(target_os = "macos")]
-    pub type __CTFontDescriptor;
     /* ************************************************************************/
     /* ************************************************************************/
     /*                                                                       */
@@ -2567,9 +2568,9 @@ pub unsafe extern "C" fn XeTeXFontMgr_prependToList(
             false
         }
     }
-    
+
     remove_first_occur(&mut *list, CStr::from_ptr(str));
-    
+
     CppStdListOfString_prepend_copy_const_char_ptr(list, str);
 }
 #[no_mangle]