Fix core-text related warnings (#62)

src/font.rs

@@ -23,7 +23,7 @@ use core_graphics::context::{CGContext, CGContextRef};
 use core_graphics::font::{CGGlyph, CGFont, CGFontRef};
 use core_graphics::geometry::{CGPoint, CGRect, CGSize};
 
-use libc::{self, size_t};
+use libc::{self, size_t, c_void};
 use std::mem;
 use std::ptr;
 
@@ -70,7 +70,7 @@ pub const kCTFontOptionsPreventAutoActivation: CTFontOptions = (1 << 0);
 pub const kCTFontOptionsPreferSystemFont: CTFontOptions = (1 << 2);
 
 #[repr(C)]
-struct __CTFont;
+pub struct __CTFont(c_void);
 
 pub type CTFontRef = *const __CTFont;
 
@@ -193,23 +193,31 @@ impl CTFont {
 
     // Names
     pub fn family_name(&self) -> String {
-        let value = get_string_by_name_key(self, kCTFontFamilyNameKey);
-        value.expect("Fonts should always have a family name.")
+        unsafe {
+            let value = get_string_by_name_key(self, kCTFontFamilyNameKey);
+            value.expect("Fonts should always have a family name.")
+        }
     }
 
     pub fn face_name(&self) -> String {
-        let value = get_string_by_name_key(self, kCTFontSubFamilyNameKey);
-        value.expect("Fonts should always have a face name.")
+        unsafe {
+            let value = get_string_by_name_key(self, kCTFontSubFamilyNameKey);
+            value.expect("Fonts should always have a face name.")
+        }
     }
 
     pub fn unique_name(&self) -> String {
-        let value = get_string_by_name_key(self, kCTFontUniqueNameKey);
-        value.expect("Fonts should always have a unique name.")
+        unsafe {
+            let value = get_string_by_name_key(self, kCTFontUniqueNameKey);
+            value.expect("Fonts should always have a unique name.")
+        }
     }
 
     pub fn postscript_name(&self) -> String {
-        let value = get_string_by_name_key(self, kCTFontPostScriptNameKey);
-        value.expect("Fonts should always have a PostScript name.")
+        unsafe {
+            let value = get_string_by_name_key(self, kCTFontPostScriptNameKey);
+            value.expect("Fonts should always have a PostScript name.")
+        }
     }
 
     pub fn all_traits(&self) -> CTFontTraits {
@@ -357,12 +365,14 @@ pub fn debug_font_names(font: &CTFont) {
         get_string_by_name_key(font, key).unwrap()
     }
 
-    println!("kCTFontFamilyNameKey: {}", get_key(font, kCTFontFamilyNameKey));
-    println!("kCTFontSubFamilyNameKey: {}", get_key(font, kCTFontSubFamilyNameKey));
-    println!("kCTFontStyleNameKey: {}", get_key(font, kCTFontStyleNameKey));
-    println!("kCTFontUniqueNameKey: {}", get_key(font, kCTFontUniqueNameKey));
-    println!("kCTFontFullNameKey: {}", get_key(font, kCTFontFullNameKey));
-    println!("kCTFontPostScriptNameKey: {}", get_key(font, kCTFontPostScriptNameKey));
+    unsafe {
+        println!("kCTFontFamilyNameKey: {}", get_key(font, kCTFontFamilyNameKey));
+        println!("kCTFontSubFamilyNameKey: {}", get_key(font, kCTFontSubFamilyNameKey));
+        println!("kCTFontStyleNameKey: {}", get_key(font, kCTFontStyleNameKey));
+        println!("kCTFontUniqueNameKey: {}", get_key(font, kCTFontUniqueNameKey));
+        println!("kCTFontFullNameKey: {}", get_key(font, kCTFontFullNameKey));
+        println!("kCTFontPostScriptNameKey: {}", get_key(font, kCTFontPostScriptNameKey));
+    }
 }
 
 pub fn debug_font_traits(font: &CTFont) {

src/font_collection.rs

@@ -18,11 +18,12 @@ use core_foundation::number::CFNumber;
 use core_foundation::set::CFSet;
 use core_foundation::string::{CFString, CFStringRef};
 
+use libc::c_void;
 use std::mem;
 use std::ptr;
 
 #[repr(C)]
-struct __CTFontCollection;
+pub struct __CTFontCollection(c_void);
 
 pub type CTFontCollectionRef = *const __CTFontCollection;
 

src/font_descriptor.rs

@@ -18,6 +18,7 @@ use core_foundation::string::{CFString, CFStringRef};
 use core_foundation::url::{CFURL, CFURLRef};
 use core_graphics::base::CGFloat;
 
+use libc::c_void;
 use std::mem;
 
 /*
@@ -182,7 +183,7 @@ pub const kCTFontPriorityDynamic: CTFontPriority = 50000;
 pub const kCTFontPriorityProcess: CTFontPriority = 60000;
 
 #[repr(C)]
-struct __CTFontDescriptor;
+pub struct __CTFontDescriptor(c_void);
 
 pub type CTFontDescriptorRef = *const __CTFontDescriptor;
 
@@ -252,23 +253,31 @@ impl CTFontDescriptor {
 
 impl CTFontDescriptor {
     pub fn family_name(&self) -> String {
-        let value = self.get_string_attribute(kCTFontDisplayNameAttribute);
-        value.expect("A font2 must have a non-null font family name.")
+        unsafe {
+            let value = self.get_string_attribute(kCTFontDisplayNameAttribute);
+            value.expect("A font2 must have a non-null font family name.")
+        }
     }
 
     pub fn font_name(&self) -> String {
-        let value = self.get_string_attribute(kCTFontNameAttribute);
-        value.expect("A font must have a non-null name.")
+        unsafe {
+            let value = self.get_string_attribute(kCTFontNameAttribute);
+            value.expect("A font must have a non-null name.")
+        }
     }
 
     pub fn style_name(&self) -> String {
-        let value = self.get_string_attribute(kCTFontStyleNameAttribute);
-        value.expect("A font must have a non-null style name.")
+        unsafe {
+            let value = self.get_string_attribute(kCTFontStyleNameAttribute);
+            value.expect("A font must have a non-null style name.")
+        }
     }
 
     pub fn display_name(&self) -> String {
-        let value = self.get_string_attribute(kCTFontDisplayNameAttribute);
-        value.expect("A font must have a non-null display name.")
+        unsafe {
+            let value = self.get_string_attribute(kCTFontDisplayNameAttribute);
+            value.expect("A font must have a non-null display name.")
+        }
     }
 
     pub fn font_path(&self) -> Option<String> {