command stage 1

src/app.c

@@ -4,8 +4,16 @@
 #include <pthread.h>
 #include <time.h>
 
+typedef struct {
+    void* element;
+    void* sender;
+    void* receiver;
+    boolean_t running;
+} LArgs;
+
 extern boolean_t render(void* element);
 extern void *event_loop(void* element);
+extern void *cmd_loop(void* element);
 
 void sleep_ms(long milliseconds)
 {
@@ -15,16 +23,23 @@ void sleep_ms(long milliseconds)
     nanosleep(&ts, NULL);
 }
 
-boolean_t c_run(void* element)
+boolean_t c_run(void* element, void* sender, void* receiver)
 {
-    pthread_t thread;
+    pthread_t event_thread;
+    pthread_t cmd_thread;
+    LArgs args = { .element = element, .sender = sender, .receiver = receiver, .running = 1 };
 
-    if (pthread_create(&thread, NULL, event_loop, element) != 0)
+    if (pthread_create(&event_thread, NULL, event_loop, &args) != 0)
     {
         perror("Failed to create thread");
     }
 
-    while (render(element))
+    if (pthread_create(&cmd_thread, NULL, cmd_loop, &args) != 0)
+    {
+        perror("Failed to create thread");
+    }
+
+    while (render(element) && args.running)
     {
         sleep_ms(20);
     }

src/app.rs

@@ -3,14 +3,48 @@ use crossterm::{
     terminal::{disable_raw_mode, enable_raw_mode},
 };
 
-use crate::{
-    utils::{clear, create_frame, flush, get_term_size, hide_cursor, render_to_frame, show_cursor},
-    Element,
+use crate::prelude::*;
+use crate::utils::{
+    clear, create_frame, flush, get_term_size, hide_cursor, render_to_frame, show_cursor,
 };
-use std::{ffi::c_void, ptr::null};
+use std::{ffi::c_void, ptr::null, sync::mpsc};
+
+pub struct LArgs {
+    pub element: *mut c_void,
+    pub sender: *const c_void,
+    pub receiver: *const c_void,
+    pub running: bool,
+}
 
 extern "C" {
-    fn c_run(element: *mut c_void) -> bool;
+    fn c_run(element: *mut c_void, sender: *const c_void, receiver: *const c_void) -> bool;
+}
+
+fn event(element: &mut Element, event: Event) {
+    if let crossterm::event::Event::Resize(width, height) = event {
+        element.update_data(width as usize, height as usize);
+    }
+    element.event(event);
+}
+
+pub fn run(element: &mut Element) -> bool {
+    hide_cursor();
+    enable_raw_mode().unwrap();
+    clear();
+    unsafe {
+        let (tx, rx) = mpsc::channel::<Command>();
+        let c = c_run(
+            element as *mut Element as *mut c_void,
+            &tx as *const mpsc::Sender<Command> as *const c_void,
+            &rx as *const mpsc::Receiver<Command> as *const c_void,
+        );
+        if !c {
+            show_cursor();
+            disable_raw_mode().unwrap();
+            clear();
+        }
+        return c;
+    }
 }
 
 #[no_mangle]
@@ -33,37 +67,39 @@ extern "C" fn event_loop(ptr: *mut c_void) -> *const c_void {
     if ptr.is_null() {
         return null() as *const c_void;
     }
-    let element = unsafe { &mut *(ptr as *mut Element) };
+    let args = unsafe { &mut *(ptr as *mut LArgs) };
+    let element = unsafe { &mut *(args.element as *mut Element) };
+    let tx = unsafe { &*(args.sender as *const mpsc::Sender<Command>) };
+
     let (width, height) = get_term_size();
     element.update_data(width, height);
     event(element, crossterm::event::Event::FocusGained);
-    loop {
+
+    while args.running {
         if ptr.is_null() {
             break;
         }
-        event(element, crossterm::event::read().unwrap())
+        event(element, crossterm::event::read().unwrap());
+        tx.send(Command::Exit).unwrap();
     }
     null() as *const c_void
 }
 
-fn event(element: &mut Element, event: Event) {
-    if let crossterm::event::Event::Resize(width, height) = event {
-        element.update_data(width as usize, height as usize);
-    }
-    element.event(event);
-}
-
-pub fn run(element: &mut Element) -> bool {
-    hide_cursor();
-    enable_raw_mode().unwrap();
-    clear();
-    unsafe {
-        let c = c_run(element as *mut Element as *mut c_void);
-        if !c {
-            show_cursor();
-            disable_raw_mode().unwrap();
-            clear();
-        }
-        return c;
+#[no_mangle]
+extern "C" fn cmd_loop(ptr: *mut c_void) -> *const c_void {
+    if ptr.is_null() {
+        return null() as *const c_void;
     }
+    let args = unsafe { &mut *(ptr as *mut LArgs) };
+    let _element = unsafe { &mut *(args.element as *mut Element) };
+    let rx = unsafe { &*(args.receiver as *const mpsc::Receiver<Command>) };
+    loop {
+        match rx.recv().unwrap() {
+            Command::Exit => {
+                args.running = false;
+                break;
+            }
+        }
+    }
+    null()
 }

src/lib.rs

@@ -43,7 +43,7 @@ pub use app::run;
 pub mod prelude {
     pub use crate::ui::Color::*;
     pub use crate::{self as osui, css, rsx, rsx_elem, ui::*, Handler};
-    pub use crate::{style, Element, Value};
+    pub use crate::{style, Command, Element, Value, Document};
     // useful for Element making
     pub use crate::{run_handler, Children, ElementCore, ElementWidget};
     pub use crossterm::event::{Event, KeyCode, KeyEvent, KeyEventKind};
@@ -195,3 +195,17 @@ impl Children {
 pub fn convert<T>(widget: &mut Box<dyn ElementWidget>) -> &mut Box<T> {
     unsafe { &mut *(widget as *mut _ as *mut Box<T>) }
 }
+
+pub enum Command {
+    Exit,
+}
+
+pub struct Document {
+    cmd_sender: std::sync::mpsc::Sender<Command>,
+}
+
+impl Document {
+    pub fn exit(&self) {
+        self.cmd_sender.send(Command::Exit).unwrap();
+    }
+}