Add min and max simplexpr functions (#1123)

* Add 'min' and 'max' function calls to simplexpr

* Add changelog entry for 'min' and 'max' simplexpr functions

CHANGELOG.md

@@ -11,6 +11,7 @@ All notable changes to eww will be listed here, starting at changes since versio
 ### Features
 - Add `:truncate` property to labels, disabled by default (except in cases where truncation would be enabled in version `0.5.0` and before) (By: Rayzeq).
 - Add support for `:hover` css selectors for tray items (By: zeapoz)
+- Add `min` and `max` function calls to simplexpr (By: ovalkonia)
 
 ## [0.6.0] (21.04.2024)
 

crates/simplexpr/src/eval.rs

@@ -328,6 +328,22 @@ fn call_expr_function(name: &str, args: Vec<DynVal>) -> Result<DynVal, EvalError
             }
             _ => Err(EvalError::WrongArgCount(name.to_string())),
         },
+        "min" => match args.as_slice() {
+            [a, b] => {
+                let a = a.as_f64()?;
+                let b = b.as_f64()?;
+                Ok(DynVal::from(f64::min(a, b)))
+            }
+            _ => Err(EvalError::WrongArgCount(name.to_string())),
+        },
+        "max" => match args.as_slice() {
+            [a, b] => {
+                let a = a.as_f64()?;
+                let b = b.as_f64()?;
+                Ok(DynVal::from(f64::max(a, b)))
+            }
+            _ => Err(EvalError::WrongArgCount(name.to_string())),
+        },
         "sin" => match args.as_slice() {
             [num] => {
                 let num = num.as_f64()?;