mvp

Cargo.toml

@@ -5,3 +5,4 @@ edition = "2024"
 
 [dependencies]
 nix = { version = "0.30.1", features = ["term", "process", "fs"], default-features = false }
+iced = "0.13.1"

flake.lock

@@ -22,11 +22,11 @@
     },
     "nixpkgs": {
       "locked": {
-        "lastModified": 1751011381,
+        "lastModified": 1751271578,
-        "narHash": "sha256-krGXKxvkBhnrSC/kGBmg5MyupUUT5R6IBCLEzx9jhMM=",
+        "narHash": "sha256-P/SQmKDu06x8yv7i0s8bvnnuJYkxVGBWLWHaU+tt4YY=",
         "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "30e2e2857ba47844aa71991daa6ed1fc678bcbb7",
+        "rev": "3016b4b15d13f3089db8a41ef937b13a9e33a8df",
         "type": "github"
       },
       "original": {

package.nix

@@ -1,9 +1,16 @@
 {
   busybox-sandbox-shell,
+  expat,
+  fontconfig,
+  freetype,
   lib,
+  libGL,
+  libxkbcommon,
   makeWrapper,
   naersk,
   pkg-config,
+  wayland,
+  xorg,
   ...
 }:
 naersk.buildPackage rec {
@@ -11,6 +18,17 @@ naersk.buildPackage rec {
   src = ./.;
   buildInputs = [
     busybox-sandbox-shell
+    expat
+    fontconfig
+    freetype
+    freetype.dev
+    libGL
+    libxkbcommon
+    wayland
+    xorg.libX11
+    xorg.libXcursor
+    xorg.libXi
+    xorg.libXrandr
   ];
   nativeBuildInputs = [
     pkg-config

src/lib.rs

@@ -0,0 +1,146 @@
+use iced::Element;
+use iced::widget::{column, scrollable, text, text_input};
+
+use nix::pty::{ForkptyResult, forkpty};
+use nix::unistd::write;
+
+use std::fs::File;
+use std::io::{Read, Write};
+use std::os::unix::io::{AsFd, OwnedFd};
+use std::process::Command;
+
+pub fn spawn_pty_with_shell(default_shell: String) -> OwnedFd {
+    match unsafe { forkpty(None, None) } {
+        Ok(fork_pty_res) => match fork_pty_res {
+            ForkptyResult::Parent { master, .. } => {
+                set_nonblock(&master);
+                master
+            }
+            ForkptyResult::Child => {
+                Command::new(&default_shell).spawn().unwrap();
+                std::thread::sleep(std::time::Duration::MAX);
+                std::process::exit(0);
+            }
+        },
+        Err(e) => panic!("failed to fork {:?}", e),
+    }
+}
+
+pub fn read_from_fd(fd: &OwnedFd) -> Option<Vec<u8>> {
+    let mut read_buffer = [0; 65536];
+    let mut file = File::from(fd.try_clone().unwrap());
+    file.flush();
+    let file = file.read(&mut read_buffer);
+    match file {
+        Ok(file) => Some(read_buffer[..file].to_vec()),
+        Err(_) => None,
+    }
+}
+
+fn set_nonblock(fd: &OwnedFd) {
+    let flags = nix::fcntl::fcntl(fd, nix::fcntl::FcntlArg::F_GETFL).unwrap();
+    let mut flags =
+        nix::fcntl::OFlag::from_bits(flags & nix::fcntl::OFlag::O_ACCMODE.bits()).unwrap();
+    flags.set(nix::fcntl::OFlag::O_NONBLOCK, true);
+    nix::fcntl::fcntl(fd, nix::fcntl::FcntlArg::F_SETFL(flags)).unwrap();
+}
+
+#[derive(Debug, Clone)]
+pub enum Msg {
+    HasInput,
+    InputChanged(String),
+}
+
+pub struct Model {
+    screen_buffer: [u8; 65536],
+    screen_buffer_index: usize,
+    fd: OwnedFd,
+    stdin: OwnedFd,
+    input: String,
+}
+
+impl Model {
+    fn new(
+        screen_buffer: [u8; 65536],
+        screen_buffer_index: usize,
+        fd: OwnedFd,
+        stdin: OwnedFd,
+        input: String,
+    ) -> Self {
+        Model {
+            screen_buffer,
+            screen_buffer_index,
+            fd,
+            stdin,
+            input,
+        }
+    }
+
+    pub fn update(&mut self, msg: Msg) {
+        match msg {
+            Msg::HasInput => {
+                let mut write_buffer = self.input.as_bytes().to_vec();
+                write_buffer.push(b'\n');
+                write(self.fd.as_fd(), &mut write_buffer);
+                self.input = String::new();
+                let mut nored = 0;
+                while nored <= 2 {
+                    let red = read_from_fd(&self.fd);
+                    match &red {
+                        Some(red) => {
+                            nored += 1;
+                            self.update_screen_buffer(red);
+                        }
+                        None => (),
+                    };
+                }
+            }
+            Msg::InputChanged(input) => self.input = input,
+        }
+    }
+
+    pub fn view(&self) -> Element<'_, Msg> {
+        scrollable(column![
+            text(String::from(
+                String::from_utf8(self.screen_buffer.to_vec())
+                    .unwrap()
+                    .trim_end_matches('\0')
+            )),
+            text_input("", &self.input)
+                .on_input(Msg::InputChanged)
+                .on_submit(Msg::HasInput)
+        ])
+        .into()
+    }
+
+    fn update_screen_buffer(&mut self, vec: &Vec<u8>) {
+        let offset = self.screen_buffer.iter().position(|&c| c == b'\0').unwrap();
+        for (i, chr) in vec.iter().enumerate() {
+            self.screen_buffer[i + offset] = chr.clone();
+        }
+    }
+}
+
+impl Default for Model {
+    fn default() -> Self {
+        let mut me = Self::new(
+            [0; 65536],
+            0,
+            spawn_pty_with_shell("/home/mtgmonkey/.nix-profile/bin/dash".to_string()),
+            std::io::stdin().as_fd().try_clone_to_owned().unwrap(),
+            String::new(),
+        );
+        let mut nored = true;
+        while nored {
+            let red = read_from_fd(&me.fd);
+            match red {
+                Some(red) => {
+                    nored = false;
+                    me.update_screen_buffer(&red);
+                }
+                None => (),
+            }
+        }
+        me
+    }
+}

src/main.rs

@@ -1,56 +1,39 @@
-use nix::pty::{ForkptyResult, forkpty};
+use iced::Element;
-use nix::unistd::{read, write};
+use iced::widget::{button, text};
-use std::fs::File;
-use std::io::{Read, Write};
-use std::os::unix::io::{AsFd, AsRawFd, BorrowedFd, OwnedFd};
-use std::process::Command;
 
-fn main() {
+use nix::unistd::write;
-    let default_shell = "/home/mtgmonkey/.nix-profile/bin/dash".to_string();
+
+use std::fs::File;
+use std::io::Read;
+use std::io::Write;
+use std::os::unix::io::{AsFd, OwnedFd};
+
+use rust_term::*;
+
+fn main() -> iced::Result {
+    iced::run("test", Model::update, Model::view)
+    /*    let default_shell = "/home/mtgmonkey/.nix-profile/bin/dash".to_string();
         let fd = spawn_pty_with_shell(default_shell);
-    set_nonblock(&fd);
         let mut write_buffer = "tty\n".as_bytes().to_vec();
         write(fd.as_fd(), &mut write_buffer);
         loop {
-        let red = read_from_fd(fd.try_clone().unwrap());
+            let red = read_from_fd(&fd);
             match red {
                 Some(red) => print!("{}", String::from_utf8(red).unwrap()),
                 None => {
-                let mut write_buffer = vec![];
+                    let mut read_buffer = [0; 65536];
-                std::io::stdin().read_to_end(&mut write_buffer);
+                    let mut file = File::from(std::io::stdin().as_fd().try_clone_to_owned().unwrap());
-                write(fd.as_fd(), &mut write_buffer);
+                    file.flush();
+                    let file = file.read(&mut read_buffer);
+                    println!(
+                        "{}",
+                        match file {
+                            Ok(file) => write(fd.as_fd(), &read_buffer[..file]).unwrap(),
+                            Err(_) => 0,
+                        }
+                    );
                 }
             };
         }
-}
+    */
-
-fn spawn_pty_with_shell(default_shell: String) -> OwnedFd {
-    match (unsafe { forkpty(None, None) }) {
-        Ok(fork_pty_res) => match fork_pty_res {
-            ForkptyResult::Parent { master, .. } => master,
-            ForkptyResult::Child => {
-                Command::new(&default_shell).spawn().unwrap();
-                std::thread::sleep(std::time::Duration::MAX);
-                std::process::exit(0);
-            }
-        },
-        Err(e) => panic!("failed to fork {:?}", e),
-    }
-}
-
-fn read_from_fd(fd: OwnedFd) -> Option<Vec<u8>> {
-    let mut read_buffer = [0; 65536];
-    let mut file = File::from(fd).read(&mut read_buffer);
-    match file {
-        Ok(file) => Some(read_buffer[..file].to_vec()),
-        Err(_) => None,
-    }
-}
-
-fn set_nonblock(fd: &OwnedFd) {
-    let flags = nix::fcntl::fcntl(fd, nix::fcntl::FcntlArg::F_GETFL).unwrap();
-    let mut flags =
-        nix::fcntl::OFlag::from_bits(flags & nix::fcntl::OFlag::O_ACCMODE.bits()).unwrap();
-    flags.set(nix::fcntl::OFlag::O_NONBLOCK, true);
-    nix::fcntl::fcntl(fd, nix::fcntl::FcntlArg::F_SETFL(flags)).unwrap();
 }