Bind wlr layer shell global and get layer surface

src/layer_shell.rs

@@ -0,0 +1,31 @@
+use std::{error::Error, io::Write};
+use crate::{surface::UnsetErr, vec_utils::WlMessage, WlClient};
+
+const NAMESPACE: &str = "chlorostart";
+const OVERLAY: u32 = 3;
+
+impl WlClient {
+    pub fn layer_shell_get_layer_surface(&mut self) -> Result<(), Box<dyn Error>> {
+        let object: u32 = self.layer_shell_id.unwrap();
+        const OPCODE: u16 = 0;
+        let msg_size: u16 = 28 + (NAMESPACE.len()+1).next_multiple_of(4) as u16;
+        let mut request = vec![0u8; msg_size as usize];
+        let mut offset: usize = 0;
+        let output: u32 = 0;
+
+        request.write_u32(&object,   &mut offset);
+        request.write_u16(&OPCODE,   &mut offset);
+        request.write_u16(&msg_size, &mut offset);
+
+        self.current_id += 1;
+        request.write_u32(&self.current_id, &mut offset);
+        request.write_u32(&self.surface_id.unwrap(), &mut offset);
+        request.write_u32(&output, &mut offset);
+        request.write_u32(&OVERLAY, &mut offset);
+        request.write_string(&NAMESPACE.to_string(), &mut offset);
+
+        self.socket.write(&request)?;
+
+        Ok(())
+    }
+}

src/main.rs

@@ -7,6 +7,7 @@ mod wl_shm;
 mod vec_utils;
 mod shm;
 mod surface;
+mod layer_shell;
 use wl_client::WlClient;
 
 fn main() -> Result<(), Box<dyn Error>> {

src/surface.rs

@@ -2,20 +2,22 @@ use std::{error::Error, io::Write};
 
 use crate::{vec_utils::WlMessage, WlClient};
 
+use std::fmt;
+
 #[derive(Debug)]
-pub struct UnsetErr (String);
+pub struct UnsetErr (pub String);
 
 impl Error for UnsetErr {}
-impl std::fmt::Display for UnsetErr {
-    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
-        write!(f, "{} not set!", self.0)
+impl fmt::Display for UnsetErr {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        write!(f, "{} is not set!", self.0)
     }
 }
 
 impl WlClient {
     pub fn wl_compositor_create_surface(&mut self) -> Result<(), Box<dyn Error>> {
         if self.compositor_id.is_none() {
-            return Err(Box::new(UnsetErr("compositor_id".to_string())));
+            return Err(UnsetErr("compositor_id".to_string()).into());
         }
 
         let object = self.compositor_id.unwrap();

src/vec_utils.rs

@@ -28,6 +28,7 @@ impl WlMessage for Vec<u8> {
     }
 
     fn write_string(&mut self, str: &String, offset: &mut usize) {
+        // TODO: Don't clone str, use &str instead of &String
         let mut str = str.clone();
         str.push('\0');
         let rounded_len: u32 = (str.len()+3) as u32 & (u32::MAX-3);

src/wl_client.rs

@@ -18,6 +18,7 @@ pub struct WlClient {
     pub compositor_id:      Option<u32>,
     pub surface_id:         Option<u32>,
     pub xdg_wm_base_id:     Option<u32>,
+    pub layer_shell_id:     Option<u32>,
 }
 
 impl WlClient {
@@ -38,6 +39,7 @@ impl WlClient {
             compositor_id:      None,
             surface_id:         None,
             xdg_wm_base_id:     None,
+            layer_shell_id:     None,
         };
 
         Ok(res)

src/wl_registry.rs

@@ -1,15 +1,27 @@
-use crate::{WlClient, vec_utils::WlMessage};
+use crate::{surface::UnsetErr, vec_utils::WlMessage, WlClient};
 use std::{io::Write, error::Error};
 
 impl WlClient {
     fn init_toplevel(&mut self) -> Result<(), Box<dyn Error>> {
-        println!("----> shm and compositor found!");
+        if self.shm_id.is_none() {
+            return Err(Box::new(UnsetErr("shm_id".to_string())));
+        }
+        if self.compositor_id.is_none() {
+            return Err(Box::new(UnsetErr("compositor_id".to_string())));
+        }
+        if self.xdg_wm_base_id.is_none() {
+            return Err(Box::new(UnsetErr("xdg_wm_base_id".to_string())));
+        }
+        if self.layer_shell_id.is_none() {
+            return Err(UnsetErr("layer_shell_id".to_string()).into());
+        }
+        println!("Initializing toplevel!");
+        self.wl_compositor_create_surface()?;
+        self.layer_shell_get_layer_surface()?;
         self.wl_shm_create_pool()?;
         self.wl_shm_pool_create_buffer(0, 200, 200)?;
-        self.wl_compositor_create_surface()?;
         self.wl_surface_attach()?;
 
-
         Ok(())
     }
 
@@ -49,6 +61,8 @@ impl WlClient {
             version,
         );
 
+        // TODO: Collapse these into one line (probably using a macro)
+
         if interface == "wl_shm" {
             self.current_id += 1;
             self.wl_registry_bind(
@@ -58,9 +72,7 @@ impl WlClient {
                 &self.current_id.clone()
             )?;
             self.shm_id = Some(self.current_id);
-            if self.compositor_id.is_some() && self.xdg_wm_base_id.is_some() {
-                self.init_toplevel()?;
-            }
+            self.init_toplevel().unwrap_or_else(|err| {eprintln!("{}", err)});
         }
 
         if interface == "wl_compositor" {
@@ -72,10 +84,7 @@ impl WlClient {
                 &self.current_id.clone()
             )?;
             self.compositor_id = Some(self.current_id);
-
-            if self.shm_id.is_some() && self.xdg_wm_base_id.is_some() {
-                self.init_toplevel()?;
-            }
+            self.init_toplevel().unwrap_or_else(|err| {eprintln!("{}", err)});
         }
 
         if interface == "xdg_wm_base" {
@@ -87,10 +96,19 @@ impl WlClient {
                 &self.current_id.clone()
             )?;
             self.xdg_wm_base_id = Some(self.current_id);
-
-            if self.shm_id.is_some() && self.compositor_id.is_some() {
-                self.init_toplevel()?;
+            self.init_toplevel().unwrap_or_else(|err| {eprintln!("{}", err)});
         }
+
+        if interface == "zwlr_layer_shell_v1" {
+            self.current_id += 1;
+            self.wl_registry_bind(
+                &name,
+                &interface,
+                &version,
+                &self.current_id.clone()
+            )?;
+            self.layer_shell_id = Some(self.current_id);
+            self.init_toplevel().unwrap_or_else(|err| {eprintln!("{}", err)});
         }
 
         Ok(())