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