Remove core_graphics::private::CGSRegion (#700)

This is a private API on macOS. This code was added for use
in `servo-glutin` and was not used outside of that as far as
I know (by doing various code searches).

Fixes #656.

core-graphics/src/lib.rs

@@ -25,8 +25,6 @@ pub mod geometry;
 pub mod gradient;
 pub mod image;
 pub mod path;
-#[cfg(target_os = "macos")]
-pub mod private;
 pub mod sys;
 #[cfg(target_os = "macos")]
 pub mod window;

core-graphics/src/private.rs

@@ -1,116 +0,0 @@
-// Copyright 2016 The Servo Project Developers. See the COPYRIGHT
-// file at the top-level directory of this distribution.
-//
-// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
-// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
-// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
-// option. This file may not be copied, modified, or distributed
-// except according to those terms.
-
-//! Evil private APIs.
-//!
-//! These are liable to change at any time. Use with caution!
-
-use crate::geometry::CGRect;
-use core::ffi::{c_int, c_uint};
-use std::ptr;
-
-pub struct CGSRegion {
-    region: ffi::CGSRegionRef,
-}
-
-impl Drop for CGSRegion {
-    fn drop(&mut self) {
-        unsafe { ffi::CGSRegionRelease(self.region) }
-    }
-}
-
-impl CGSRegion {
-    #[inline]
-    pub fn from_rect(rect: &CGRect) -> CGSRegion {
-        unsafe {
-            let mut region = ptr::null_mut();
-            assert!(ffi::CGSNewRegionWithRect(rect, &mut region) == 0);
-            CGSRegion { region }
-        }
-    }
-
-    #[inline]
-    pub fn from_rects(rects: &[CGRect]) -> CGSRegion {
-        unsafe {
-            let mut region = ptr::null_mut();
-            assert!(
-                ffi::CGSNewRegionWithRectList(rects.as_ptr(), rects.len() as c_uint, &mut region)
-                    == 0
-            );
-            CGSRegion { region }
-        }
-    }
-}
-
-/// This should always be memory-safe; the window server rejects any invalid surface IDs.
-pub struct CGSSurface {
-    context_id: c_uint,
-    window_number: c_int,
-    surface_id: c_uint,
-}
-
-impl CGSSurface {
-    #[inline]
-    pub fn from_ids(context_id: c_uint, window_number: c_int, surface_id: c_uint) -> CGSSurface {
-        CGSSurface {
-            context_id,
-            window_number,
-            surface_id,
-        }
-    }
-
-    #[inline]
-    pub fn id(&self) -> c_uint {
-        self.surface_id
-    }
-
-    #[inline]
-    pub fn set_shape(&self, region: &CGSRegion) {
-        unsafe {
-            assert!(
-                ffi::CGSSetSurfaceShape(
-                    self.context_id,
-                    self.window_number,
-                    self.surface_id,
-                    region.region
-                ) == 0
-            )
-        }
-    }
-}
-
-mod ffi {
-    use crate::geometry::CGRect;
-    use core::ffi::{c_int, c_uint};
-
-    // This is an enum so that we can't easily make instances of this opaque type.
-    pub enum CGSRegionObject {}
-
-    pub type CGError = OSStatus;
-    pub type CGSRegionRef = *mut CGSRegionObject;
-    pub type OSStatus = i32;
-
-    #[cfg_attr(feature = "link", link(name = "CoreGraphics", kind = "framework"))]
-    extern "C" {
-        pub fn CGSRegionRelease(region: CGSRegionRef);
-        pub fn CGSNewRegionWithRect(rect: *const CGRect, outRegion: *mut CGSRegionRef) -> CGError;
-        pub fn CGSNewRegionWithRectList(
-            rects: *const CGRect,
-            rectCount: c_uint,
-            outRegion: *mut CGSRegionRef,
-        ) -> CGError;
-
-        pub fn CGSSetSurfaceShape(
-            contextID: c_uint,
-            windowNumber: c_int,
-            surfaceID: c_uint,
-            region: CGSRegionRef,
-        ) -> CGError;
-    }
-}