add: plugins

Cargo.lock

@@ -4,4 +4,4 @@ version = 4
 
 [[package]]
 name = "bberry"
-version = "0.1.2"
+version = "0.2.0"

Cargo.toml

@@ -1,7 +1,7 @@
 [package]
 name = "bberry"
 description = "lisp-like dsl which \"compiles\" into html"
-version = "0.1.2"
+version = "0.2.0"
 edition = "2024"
 authors = ["trisuaso"]
 repository = "https://trisua.com/t/bberry.git"

examples/plugins.lisp

@@ -0,0 +1,4 @@
+(h1 (say_hi)) ; plugins with no parameters
+(say_hi_with_params (text "jeff")) ; plugins with parameters
+(pre (say_hi_multiple (text "abcd") (text "xyz"))) ; mutliple parameters in plugins
+(pre (code (read_file (text ".gitignore")))) ; slightly more advanced plugins

src/core/element.rs

@@ -1,8 +1,14 @@
 use std::collections::HashMap;
 
-pub trait Render {
+pub trait Render<'a> {
     /// Render into HTML.
-    fn render(&self) -> String;
+    fn render(
+        self,
+        plugins: &mut HashMap<String, Box<dyn FnMut(Element) -> Element + 'a>>,
+    ) -> String;
+
+    /// Render into HTML with no plugins.
+    fn render_safe(self) -> String;
 }
 
 pub const SELF_CLOSING_TAGS: &[&str] = &["img", "br", "hr", "input", "meta", "link"];
@@ -16,8 +22,11 @@ pub struct Element {
     pub children: Vec<Element>,
 }
 
-impl Render for Element {
-    fn render(&self) -> String {
+impl<'a> Render<'a> for Element {
+    fn render(
+        self,
+        plugins: &mut HashMap<String, Box<dyn FnMut(Element) -> Element + 'a>>,
+    ) -> String {
         if self.tag == "text" {
             return self.attrs.get("content").unwrap().to_owned();
         } else if self.tag == "v" {
@@ -27,10 +36,12 @@ impl Render for Element {
             let mut inner: String = String::new();
 
             for element in &self.children {
-                inner.push_str(&element.render());
+                inner.push_str(&element.clone().render(plugins));
             }
 
             return inner;
+        } else if let Some(f) = plugins.get_mut(&self.tag) {
+            return f(self).render(plugins);
         }
 
         let closing = format!("</{}>", self.tag);
@@ -59,7 +70,7 @@ impl Render for Element {
                 let mut inner: String = String::new();
 
                 for element in &self.children {
-                    inner.push_str(&element.render());
+                    inner.push_str(&element.clone().render(plugins));
                 }
 
                 inner
@@ -71,4 +82,15 @@ impl Render for Element {
             }
         )
     }
+
+    fn render_safe(self) -> String {
+        self.render(&mut {
+            let mut h = HashMap::new();
+            h.insert(
+                "#null".to_string(),
+                Box::new(|x: Element| x.to_owned()) as _,
+            );
+            h
+        })
+    }
 }

src/core/parser.rs

@@ -101,34 +101,7 @@ pub fn expr_parser(buf: &str) -> Element {
         }
 
         // special elements
-        if element.tag == "#" {
-            // parse as tuple
-            // tuples can only contain strings
-            let len = buf.matches("s\"").collect::<Vec<&str>>().len();
-            let mut values: Vec<String> = Vec::new();
-            let mut last_len: usize = 0;
-
-            for _ in 0..len {
-                let mut buffer: String = String::new();
-
-                string_parser(
-                    buf.replace("# ", "")
-                        .replace("s\"", "\"")
-                        .chars()
-                        .skip(last_len),
-                    &mut buffer,
-                );
-                last_len = buffer.len() + 2;
-
-                values.push(buffer);
-            }
-
-            for (i, v) in values.iter().enumerate() {
-                element.attrs.insert(i.to_string(), v.to_owned());
-            }
-
-            return element;
-        } else if (element.tag == "attr") | (element.tag == ":") | (element.tag.is_empty()) {
+        if (element.tag == "attr") | (element.tag == ":") | (element.tag.is_empty()) {
             let mut chars = (&buf[i..buf.len()]).to_string();
 
             if element.tag.is_empty() {
@@ -264,6 +237,6 @@ pub fn element_parser(value: &str) -> (Element, usize) {
 }
 
 /// Parse a full document.
-pub fn document(value: &str) -> (Element, usize) {
-    element_parser(&format!("(null? [{value}])"))
+pub fn document(value: &str) -> Element {
+    element_parser(&format!("(null? [{value}])")).0
 }

src/lib.rs

@@ -1,17 +1,24 @@
 pub mod core;
+pub mod macros;
 pub use core::parser::document as parse;
 
 #[cfg(test)]
 mod test {
-    use crate::{core::element::Render, parse};
+    use std::{
+        collections::HashMap,
+        time::{Duration, SystemTime},
+    };
+
+    use crate::{
+        core::element::{Element, Render},
+        parse, read_param, text,
+    };
 
     #[test]
     fn string_escape() {
         std::fs::write(
             "string_escape.html",
-            parse(&std::fs::read_to_string("examples/string_escape.lisp").unwrap())
-                .0
-                .render(),
+            parse(&std::fs::read_to_string("examples/string_escape.lisp").unwrap()).render_safe(),
         )
         .unwrap();
 
@@ -22,13 +29,70 @@ mod test {
     }
 
     #[test]
-    fn boilerplate() {
+    fn plugins() {
         std::fs::write(
-            "boilerplate.html",
-            parse(&std::fs::read_to_string("examples/boilerplate.lisp").unwrap())
-                .0
-                .render(),
+            "plugins.html",
+            parse(&std::fs::read_to_string("examples/plugins.lisp").unwrap()).render(&mut {
+                let mut h = HashMap::new();
+
+                h.insert(
+                    "say_hi".to_string(),
+                    Box::new(|_| text!("Hello, world!")) as _,
+                );
+
+                h.insert(
+                    "say_hi_with_params".to_string(),
+                    Box::new(|e: Element| text!(read_param!(e, 0))) as _,
+                );
+
+                h.insert(
+                    "say_hi_multiple".to_string(),
+                    Box::new(|e: Element| {
+                        let mut content: String = String::new();
+
+                        for child in e.children {
+                            let text = child.attrs.get("content").unwrap();
+                            content += &format!("{text}, ");
+                        }
+
+                        text!(content)
+                    }) as _,
+                );
+
+                h.insert(
+                    "read_file".to_string(),
+                    Box::new(|e: Element| {
+                        text!(std::fs::read_to_string(read_param!(e, 0)).unwrap())
+                    }) as _,
+                );
+
+                h
+            }),
         )
         .unwrap();
     }
+
+    #[test]
+    fn boilerplate() {
+        std::fs::write(
+            "boilerplate.html",
+            parse(&std::fs::read_to_string("examples/boilerplate.lisp").unwrap()).render_safe(),
+        )
+        .unwrap();
+    }
+
+    #[test]
+    fn boilerplate_speed() {
+        let start = SystemTime::now();
+
+        std::fs::write(
+            "boilerplate.html",
+            parse(&std::fs::read_to_string("examples/boilerplate.lisp").unwrap()).render_safe(),
+        )
+        .unwrap();
+
+        let duration = start.elapsed().unwrap();
+        println!("took: {}μs", duration.as_micros());
+        assert!(duration < Duration::from_micros(500))
+    }
 }

src/macros.rs

@@ -0,0 +1,51 @@
+#[macro_export]
+macro_rules! text {
+    ($t:literal) => {
+        $crate::core::element::Element {
+            tag: "text".to_string(),
+            children: Vec::new(),
+            attrs: {
+                let mut a = HashMap::new();
+                a.insert("content".to_string(), $t.to_string());
+                a
+            },
+        }
+    };
+
+    ($t:ident) => {
+        $crate::core::element::Element {
+            tag: "text".to_string(),
+            children: Vec::new(),
+            attrs: {
+                let mut a = HashMap::new();
+                a.insert("content".to_string(), $t.to_string());
+                a
+            },
+        }
+    };
+
+    ($t:expr) => {
+        $crate::core::element::Element {
+            tag: "text".to_string(),
+            children: Vec::new(),
+            attrs: {
+                let mut a = HashMap::new();
+                a.insert("content".to_string(), ($t).to_string());
+                a
+            },
+        }
+    };
+}
+
+#[macro_export]
+macro_rules! read_param {
+    ($element:ident, $id:literal) => {
+        $element
+            .children
+            .get($id)
+            .unwrap()
+            .attrs
+            .get("content")
+            .unwrap()
+    };
+}