123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778
// TODO: win/linux
#[cfg(target_os = "macos")]#[link(name = "WebKit", kind = "framework")]extern "C" {}
use crate::{App, Window};use std::os::raw::c_void;use std::ptr::null;use std::rc::Rc;
#[cfg(target_os = "macos")]use objc::{class, msg_send, rc::StrongPtr, runtime::Object, sel, sel_impl};#[cfg(target_os = "macos")]#[allow(non_camel_case_types)]type id = *mut Object;
pub struct WebView {    _app: Rc<App>,    #[cfg(target_os = "macos")]    webview: StrongPtr,}
impl WebView {    pub fn new(app: &Rc<App>) -> Self {        #[cfg(target_os = "macos")]        unsafe {            let cfg: id = msg_send![class!(WKWebViewConfiguration), new];            let del: id = msg_send![class!(NSObject), alloc];            let webview: id = msg_send![class!(WKWebView), alloc];            let () = msg_send![webview, initWithFrame:[0f64, 0., 0., 0.] configuration:cfg];            let () = msg_send![webview, setUIDelegate: del];
            return Self {                _app: Rc::clone(app),                webview: StrongPtr::retain(webview),            };        }
        #[cfg(not(target_os = "macos"))]        Self { _app: Rc::clone(app) }    }
    pub fn attach(&mut self, window: &mut Window) {        #[cfg(target_os = "macos")]        unsafe {            let ns_window: id = window.native_handle() as _;            let () = msg_send![ns_window, setContentView:*self.webview];        }    }
    // TODO: doesn't work when in separate method (it only works as part of new())    pub fn load_url(&mut self, url: &str) {        #[cfg(target_os = "macos")]        unsafe {            let url: id = msg_send![class!(NSString), stringWithUTF8String: *c_str!(url)];            let url: id = msg_send![class!(NSURL), URLWithString: url];            let req: id = msg_send![class!(NSURLRequest), requestWithURL: url];            let () = msg_send![*self.webview, loadRequest: req];        }    }
    pub fn eval(&mut self, js: &str) {        println!("eval: {:?}", js);
        // TODO: get result (might be tricky because of main thread queue & possible deadlocks)        //let (tx, rx) = channel();
        #[cfg(target_os = "macos")]        unsafe {            let js: id = msg_send![class!(NSString), stringWithUTF8String: *c_str!(js)];
            // TODO: pass closure & get the result            let () = msg_send![*self.webview, evaluateJavaScript:js completionHandler:null::<*const c_void>()];        }    }}