Add matches function to simplexpr

CHANGELOG.md

@@ -28,6 +28,7 @@ All notable changes to eww will be listed here, starting at changes since versio
 - Add `notification` window type
 - Add drag and drop functionality to eventbox
 - Add `search`, `captures`, `stringlength`, `arraylength` and `objectlength` functions for expressions (By: MartinJM, ElKowar)
+- Add `matches` function
 
 ### Notable Internal changes
 - Rework state management completely, now making local state and dynamic widget hierarchy changes possible.

crates/simplexpr/src/eval.rs

@@ -270,6 +270,14 @@ fn call_expr_function(name: &str, args: Vec<DynVal>) -> Result<DynVal, EvalError
             }
             _ => Err(EvalError::WrongArgCount(name.to_string())),
         },
+        "matches" => match args.as_slice() {
+            [string, pattern] => {
+                let string = string.as_string()?;
+                let pattern = regex::Regex::new(&pattern.as_string()?)?;
+                Ok(DynVal::from(pattern.is_match(&string)))
+            }
+            _ => Err(EvalError::WrongArgCount(name.to_string())),
+        },
         "replace" => match args.as_slice() {
             [string, pattern, replacement] => {
                 let string = string.as_string()?;

docs/src/expression_language.md

@@ -33,7 +33,9 @@ Supported currently are the following features:
     - `round(number, decimal_digits)`: Round a number to the given amount of decimals
     - `replace(string, regex, replacement)`: Replace matches of a given regex in a string
 	- `search(string, regex)`: Search for a given regex in a string (returns array)
+	- `matches(string, regex)`: check if a given string matches a given regex (returns bool)
 	- `captures(string, regex)`: Get the captures of a given regex in a string (returns array)
-	- `hex_decode(string)`: Hex decodes the string
-	- `length(value)`: Gets the length of the value, as string length, json array length, or json object length
+	- `strlength(value)`: Gets the length of the string
+	- `arraylength(value)`: Gets the length of the array
+	- `objectlength(value)`: Gets the amount of entries in the object