1 files changed, 84 insertions, 0 deletions
diff --git a/copypasta/src/osx_clipboard.rs b/copypasta/src/osx_clipboard.rs
new file mode 100644
index 00000000..0d65679d
--- /dev/null
+++ b/copypasta/src/osx_clipboard.rs
@@ -0,0 +1,84 @@
+// Copyright 2016 Avraham Weinstock
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+use common::*;
+use objc::runtime::{Class, Object};
+use objc_foundation::{INSArray, INSObject, INSString};
+use objc_foundation::{NSArray, NSDictionary, NSObject, NSString};
+use objc_id::{Id, Owned};
+use std::error::Error;
+use std::mem::transmute;
+
+pub struct OSXClipboardContext {
+    pasteboard: Id<Object>,
+}
+
+// required to bring NSPasteboard into the path of the class-resolver
+#[link(name = "AppKit", kind = "framework")]
+extern "C" {}
+
+impl OSXClipboardContext {
+    pub fn new() -> Result<OSXClipboardContext, Box<dyn Error>> {
+        let cls = Class::get("NSPasteboard").ok_or("Class::get(\"NSPasteboard\")")?;
+        let pasteboard: *mut Object = unsafe { msg_send![cls, generalPasteboard] };
+        if pasteboard.is_null() {
+            return Err("NSPasteboard#generalPasteboard returned null".into());
+        }
+        let pasteboard: Id<Object> = unsafe { Id::from_ptr(pasteboard) };
+        Ok(OSXClipboardContext { pasteboard })
+    }
+}
+
+impl ClipboardProvider for OSXClipboardContext {
+    fn get_contents(&mut self) -> Result<String, Box<dyn Error>> {
+        let string_class: Id<NSObject> = {
+            let cls: Id<Class> = unsafe { Id::from_ptr(class("NSString")) };
+            unsafe { transmute(cls) }
+        };
+        let classes: Id<NSArray<NSObject, Owned>> = NSArray::from_vec(vec![string_class]);
+        let options: Id<NSDictionary<NSObject, NSObject>> = NSDictionary::new();
+        let string_array: Id<NSArray<NSString>> = unsafe {
+            let obj: *mut NSArray<NSString> =
+                msg_send![self.pasteboard, readObjectsForClasses:&*classes options:&*options];
+            if obj.is_null() {
+                return Err("pasteboard#readObjectsForClasses:options: returned null".into());
+            }
+            Id::from_ptr(obj)
+        };
+        if string_array.count() == 0 {
+            Err("pasteboard#readObjectsForClasses:options: returned empty".into())
+        } else {
+            Ok(string_array[0].as_str().to_owned())
+        }
+    }
+
+    fn set_contents(&mut self, data: String) -> Result<(), Box<dyn Error>> {
+        let string_array = NSArray::from_vec(vec![NSString::from_str(&data)]);
+        let _: usize = unsafe { msg_send![self.pasteboard, clearContents] };
+        let success: bool = unsafe { msg_send![self.pasteboard, writeObjects: string_array] };
+        return if success {
+            Ok(())
+        } else {
+            Err("NSPasteboard#writeObjects: returned false".into())
+        };
+    }
+}
+
+// this is a convenience function that both cocoa-rs and
+//  glutin define, which seems to depend on the fact that
+//  Option::None has the same representation as a null pointer
+#[inline]
+pub fn class(name: &str) -> *mut Class {
+    unsafe { transmute(Class::get(name)) }
+}