core, output: add Has, HasSize

core/src/lib.rs

@@ -5,3 +5,17 @@ pub type Usually<T> = Result<T, Box<dyn Error>>;
 
 /// Standard optional result type.
 pub type Perhaps<T> = Result<Option<T>, Box<dyn Error>>;
+
+/// Implement the `From` trait.
+#[macro_export] macro_rules! from {
+    ($(<$($lt:lifetime),+>)?|$state:ident:$Source:ty|$Target:ty=$cb:expr) => {
+        impl $(<$($lt),+>)? From<$Source> for $Target {
+            fn from ($state:$Source) -> Self { $cb }
+        }
+    };
+}
+
+pub trait Has<T>: Send + Sync {
+    fn get     (&self) -> &T;
+    fn get_mut (&mut self) -> &mut T;
+}

output/src/space/measure.rs

@@ -3,13 +3,17 @@ use std::sync::{Arc, atomic::{AtomicUsize, Ordering::Relaxed}};
 
 pub trait HasSize<E: Output> {
     fn size (&self) -> &Measure<E>;
+    fn width (&self) -> usize {
+        self.size().w()
+    }
+    fn height (&self) -> usize {
+        self.size().w()
+    }
 }
 
-#[macro_export] macro_rules! has_size {
+impl<E: Output, T: Has<Measure<E>>> HasSize<E> for T {
-    (<$E:ty>|$self:ident:$Struct:ident$(<$($L:lifetime),*$($T:ident$(:$U:path)?),*>)?|$cb:expr) => {
+    fn size (&self) -> &Measure<E> {
-        impl $(<$($L),*$($T $(: $U)?),*>)? HasSize<$E> for $Struct $(<$($L),*$($T),*>)? {
+        self.get()
-            fn size (&$self) -> &Measure<$E> { $cb }
-        }
     }
 }
 

proc/src/proc_command.rs

@@ -82,6 +82,7 @@ impl ToTokens for CommandDef {
                 fn get <'source> (&self, iter: &mut ::tengri::dsl::TokenIter<'source>)
                     -> Option<#enumeration>
                 {
+                    use ::tengri::dsl::TryFromDsl;
                     #enumeration::try_from_expr(self, iter)
                 }
             }

tui/src/lib.rs

@@ -33,16 +33,6 @@ pub use ::ratatui; pub(crate) use ratatui::{
 
 pub(crate) use std::sync::{Arc, RwLock, atomic::{AtomicBool, Ordering::*}};
 pub(crate) use std::io::{stdout, Stdout};
-pub(crate) use std::path::PathBuf;
-pub(crate) use std::ffi::OsString;
-
-#[macro_export] macro_rules! from {
-    ($(<$($lt:lifetime),+>)?|$state:ident:$Source:ty|$Target:ty=$cb:expr) => {
-        impl $(<$($lt),+>)? From<$Source> for $Target {
-            fn from ($state:$Source) -> Self { $cb }
-        }
-    };
-}
 
 #[cfg(test)] #[test] fn test_tui_engine () -> Usually<()> {
     use crate::*;