update docs syntax highlighting, remove unsused code

crates/highlight/src/lib.rs

@@ -1,3 +1,112 @@
-//! Provides syntax highlighting for the editor by transforming a string to markup nodes.
-pub mod highlight_parser;
-pub mod tokenizer;
+use roc_parse::highlight::Token;
+use roc_region::all::Loc;
+
+pub fn highlight_roc_code(code: &str) -> String {
+    let locations: Vec<Loc<Token>> = roc_parse::highlight::highlight(code);
+    let mut buf: Vec<String> = Vec::new();
+    let mut offset = 0;
+
+    for location in locations {
+        let current_text = &code[offset..location.byte_range().end];
+
+        match location.value {
+            Token::LineComment | Token::DocComment => {
+                buf = push_html_span(buf, current_text, "comment");
+            }
+            Token::SingleQuote
+            | Token::String
+            | Token::UnicodeEscape
+            | Token::EscapedChar
+            | Token::Interpolated => {
+                buf = push_html_span(buf, current_text, "str");
+            }
+            Token::Keyword => {
+                buf = push_html_span(buf, current_text, "kw");
+            }
+            Token::Number => {
+                buf = push_html_span(buf, current_text, "number");
+            }
+            Token::Pizza => {
+                buf = push_html_span(buf, current_text, "pipe");
+            }
+            Token::Arrow | Token::Backpass => {
+                buf = push_html_span(buf, current_text, "arrow");
+            }
+            Token::Bar => {
+                buf = push_html_span(buf, current_text, "bar");
+            }
+            Token::Backslash => {
+                buf = push_html_span(buf, current_text, "backslash");
+            }
+            Token::Comma => {
+                buf = push_html_span(buf, current_text, "comma");
+            }
+            Token::QuestionMark => {
+                buf = push_html_span(buf, current_text, "qmark");
+            }
+            Token::ColonEquals | Token::Colon => {
+                buf = push_html_span(buf, current_text, "colon");
+            }
+            Token::Percent
+            | Token::Caret
+            | Token::Bang
+            | Token::BangEquals
+            | Token::Slash
+            | Token::DoubleSlash
+            | Token::Pipe
+            | Token::GreaterThan
+            | Token::GreaterThanEquals
+            | Token::Minus
+            | Token::LessThan
+            | Token::LessThanEquals
+            | Token::DoubleEquals
+            | Token::DoubleBar
+            | Token::Plus
+            | Token::And
+            | Token::DoubleAnd
+            | Token::Equals => {
+                buf = push_html_span(buf, current_text, "op");
+            }
+            Token::Paren => {
+                buf = push_html_span(buf, current_text, "paren");
+            }
+            Token::Bracket => {
+                buf = push_html_span(buf, current_text, "bracket");
+            }
+            Token::Brace => {
+                buf = push_html_span(buf, current_text, "brace");
+            }
+            Token::UpperIdent => {
+                buf = push_html_span(buf, current_text, "upperident");
+            } 
+            Token::LowerIdent => {
+                buf = push_html_span(buf, current_text, "lowerident");
+            } 
+            Token::Error | Token::Other => {
+                buf = push_html(buf, current_text);
+            }
+        }
+
+        offset = location.byte_range().end;
+    }
+
+    format!("<pre><samp>{}</samp></pre>", buf.join(""))
+}
+
+fn push_html_span(mut buf: Vec<String>, curr: &str, class: &str) -> Vec<String> {
+    // html escape strings from source code
+    let escaped = html_escape::encode_text(curr);
+
+    buf.push(format!("<span class=\"{}\">{}</span>", class, escaped));
+
+    buf
+}
+
+fn push_html(mut buf: Vec<String>, curr: &str) -> Vec<String> {
+    // html escape strings from source code
+    let escaped = html_escape::encode_text(curr);
+
+    buf.push(format!("{}", escaped));
+
+    buf
+}