use the new highlighter in all the pages

.gitignore

@@ -1,3 +1,4 @@
 node_modules
 static/css/out.css
 static/learn
+static/js/highlighter.js

lexer/highlighter.ts

@@ -0,0 +1,21 @@
+import {lex} from "./lexer.ts";
+import { CodeJar } from "codejar"
+
+function thp_highlighter(editor: any) {
+    let code: string = editor.textContent;
+
+    let tokens = lex(code);
+
+    let highlighted_code = "";
+
+    for (let token of tokens) {
+        highlighted_code += `<span class="token ${token.token_type}">${token.v}</span>`;
+    }
+
+    editor.innerHTML = highlighted_code;
+}
+
+// @ts-ignore
+window.thp_highlighter = thp_highlighter;
+// @ts-ignore
+window.CodeJar = CodeJar;

lexer/identifier_lexer.test.ts

@@ -0,0 +1,55 @@
+import { expect, test, describe } from "bun:test";
+import { scan_identifier } from "./identifier_lexer";
+
+
+describe("Identifier Lexer", () => {
+    test("should return an identifier token", () => {
+        const code = "a";
+        const token = scan_identifier(code, 0);
+
+        expect(token).toEqual([{ v: "a", token_type: "identifier" }, 1]);
+    });
+
+    test("should scan an underscore", () => {
+        const code = "_";
+        const token = scan_identifier(code, 0);
+
+        expect(token).toEqual([{ v: "_", token_type: "identifier" }, 1]);
+    });
+
+    test("should scan an identifier with an underscore", () => {
+        const code = "a_";
+        const token = scan_identifier(code, 0);
+
+        expect(token).toEqual([{ v: "a_", token_type: "identifier" }, 2]);
+    });
+
+    test("should scan an identifier that starts with an underscore", () => {
+        const code = "_a";
+        const token = scan_identifier(code, 0);
+
+        expect(token).toEqual([{ v: "_a", token_type: "identifier" }, 2]);
+    });
+
+    test("should scan an identifier with numbers and uppercase letters", () => {
+        const code = "aA1";
+        const token = scan_identifier(code, 0);
+
+        expect(token).toEqual([{ v: "aA1", token_type: "identifier" }, 3]);
+    });
+
+    test("should scan a keyword", () => {
+        const code = "val";
+        const token = scan_identifier(code, 0);
+
+        expect(token).toEqual([{ v: "val", token_type: "keyword" }, 3]);
+    });
+
+    test("should scan a datatype", () => {
+        const code = "Int";
+        const token = scan_identifier(code, 0, true);
+
+        expect(token).toEqual([{ v: "Int", token_type: "class-name" }, 3]);
+    });
+});
+

lexer/identifier_lexer.ts

@@ -0,0 +1,44 @@
+import type { Token } from "./lexer.ts";
+import { is_identifier_char } from "./utils.ts";
+
+/**
+ * Scans an identifier, at the given position in the input string.
+ * This function assumes that the character at the given position is a letter.
+ * 
+ * @param input the input string
+ * @param starting_position the position to start scanning from
+ * @param is_datatype whether the identifier is a datatype
+ */
+export function scan_identifier(input: string, starting_position: number, is_datatype = false): [Token, number] {
+    let value = input[starting_position];
+    let pos = starting_position + 1;
+
+    while (pos < input.length) {
+        const c = input[pos];
+
+        if (is_identifier_char(c)) {
+            pos += 1;
+            value += c;
+        }
+        else {
+            break;
+        }
+    }
+
+    if (is_datatype) {
+        return [{ v: value, token_type: "class-name" }, pos];
+    }
+    else {
+        return [{ v: value, token_type: check_keyword(value) }, pos];
+    }
+}
+
+function check_keyword(value: string): string {
+    const keywords = ["case", "static", "const", "enum", "loop", "use", "break", "catch", "continue", "do", "else", "finally", "for", "fun", "if", "in", "fn", "nil", "return", "throw", "try", "while", "type", "match", "with", "of", "abstract", "class", "interface", "private", "pub", "map", "override", "open", "init", "val", "var", "mut", "clone"];
+
+    if (keywords.includes(value)) {
+        return "keyword";
+    }
+    return "identifier";
+}
+

lexer/lexer.test.ts

@@ -0,0 +1,45 @@
+import { expect, test, describe } from "bun:test";
+import { lex } from "./lexer";
+
+describe("Lexer", () => {
+    test("empty program should return no tokens", () => {
+        const code = "";
+        const tokens = lex(code);
+        expect(tokens).toEqual([]);
+    });
+
+    test("program with whitespace should return a single token", () => {
+        const code = " ";
+        const tokens = lex(code);
+        expect(tokens).toEqual([{v: " ", token_type: ""}]);
+    })
+
+    test("program with newlines should return a single token", () => {
+        const code = "\n";
+        const tokens = lex(code);
+        expect(tokens).toEqual([{v: "\n", token_type: ""}]);
+    });
+
+    test("program with random unicode should return the same unicode", () => {
+        const code = "🍕";
+        const tokens = lex(code);
+        expect(tokens).toEqual([{v: "🍕", token_type: ""}]);
+    });
+
+    test("should scan integers", () => {
+        const code = "12345";
+        const tokens = lex(code);
+        expect(tokens).toEqual([{v: "12345", token_type: "number"}]);
+    });
+
+    test("should scan integers and whitespace around", () => {
+        const code = "   12345  \n  ";
+        const tokens = lex(code);
+        expect(tokens).toEqual([
+            {v: "   ", token_type: ""},
+            {v: "12345", token_type: "number"},
+            {v: "  \n  ", token_type: ""},
+        ]);
+    });
+});
+

lexer/lexer.ts

@@ -0,0 +1,138 @@
+import { scan_identifier } from "./identifier_lexer.ts";
+import { scan_number } from "./number_lexer.ts";
+import { scan_string } from "./string_lexer.ts";
+import { is_digit, is_lowercase, is_uppercase } from "./utils.ts";
+
+export type Token = {
+    v: string,
+    token_type: string,
+};
+
+/**
+ * Lexes a string of THP code, and returns an array of tokens. Unlike a regular
+ * lexer, whitespace and other characters are not ignored, and are instead treated
+ * as a default token.
+ * 
+ * This lexer implements a subset of the grammar defined in the THP language specification,
+ * only recognizing the following tokens:
+ * - Identifier
+ * - Datatype
+ * - String
+ * - Number
+ * - Single line comment
+ * - Multi line comment
+ * - Keywords
+ * 
+ * @param code Code to lex
+ * @returns An array of all the tokens found
+ */
+export function lex(code: string): Array<Token> {
+    const code_len = code.length;
+    const tokens: Array<Token> = [];
+
+    let current_pos = 0;
+    let current_default_token = "";
+
+    while (current_pos < code_len) {
+        const c = code[current_pos];
+
+        // try to scan a number
+        if (is_digit(c)) {
+            // if the current default token is not empty, push it to the tokens array
+            if (current_default_token !== "") {
+                tokens.push({ v: current_default_token, token_type: "" });
+                current_default_token = "";
+            }
+
+            // lex a number
+            const [token, next] = scan_number(code, current_pos);
+            current_pos = next;
+            tokens.push(token);
+            continue;
+        }
+        // try to scan an identifier/keyword
+        else if (is_lowercase(c) || c === "_") {
+            // if the current default token is not empty, push it to the tokens array
+            if (current_default_token !== "") {
+                tokens.push({ v: current_default_token, token_type: "" });
+                current_default_token = "";
+            }
+
+            const [token, next] = scan_identifier(code, current_pos);
+            current_pos = next;
+            tokens.push(token);
+            continue;
+        }
+        // try to scan a datatype
+        else if (is_uppercase(c)) {
+            // if the current default token is not empty, push it to the tokens array
+            if (current_default_token !== "") {
+                tokens.push({ v: current_default_token, token_type: "" });
+                current_default_token = "";
+            }
+
+            const [token, next] = scan_identifier(code, current_pos, true);
+            current_pos = next;
+            tokens.push(token);
+            continue;
+        }
+        // try to scan a string
+        else if (c === "\"") {
+            // if the current default token is not empty, push it to the tokens array
+            if (current_default_token !== "") {
+                tokens.push({ v: current_default_token, token_type: "" });
+                current_default_token = "";
+            }
+
+            const [token, next] = scan_string(code, current_pos);
+            current_pos = next;
+            tokens.push(token);
+            continue;
+        }
+        // try to scan a comment
+        else if (c === "/" && code[current_pos + 1] === "/") {
+            // if the current default token is not empty, push it to the tokens array
+            if (current_default_token !== "") {
+                tokens.push({ v: current_default_token, token_type: "" });
+                current_default_token = "";
+            }
+
+            let comment = "";
+            let pos = current_pos;
+
+            while (pos < code_len) {
+                const char = code[pos];
+
+                if (char === "\n") {
+                    break;
+                }
+
+                comment += char;
+                pos++;
+            }
+
+            tokens.push({ v: comment, token_type: "comment" });
+            current_pos = pos;
+            continue;
+        }
+        // replace < with &lt;
+        else if (c === "<") {
+            current_default_token += "&lt;";
+            current_pos++;
+            continue;
+        }
+
+        current_default_token += c;
+        current_pos++;
+    }
+
+    // if there was a default token, push it to the tokens array
+    if (current_default_token !== "") {
+        tokens.push({ v: current_default_token, token_type: "" });
+        current_default_token = "";
+    }
+
+    return tokens;
+}
+
+

lexer/number_lexer.test.ts

@@ -0,0 +1,19 @@
+import { expect, test, describe } from "bun:test";
+import { scan_number } from "./number_lexer";
+
+describe("Number Lexer", () => {
+    test("should return a whole number token", () => {
+        const code = "1";
+        const token = scan_number(code, 0);
+
+        expect(token).toEqual([{ v: "1", token_type: "number" }, 1]);
+    });
+
+    test("should return a whole number token pt 2", () => {
+        const code = "12345";
+        const token = scan_number(code, 0);
+
+        expect(token).toEqual([{ v: "12345", token_type: "number" }, 5]);
+    });
+});
+

lexer/number_lexer.ts

@@ -0,0 +1,47 @@
+import type { Token } from "./lexer.ts";
+import { is_digit } from "./utils.ts";
+
+/**
+ * Scans a number, at the given position in the input string.
+ * This function assumes that the character at the given position is a digit.
+ * It follows this grammar:
+ * 
+ * @param input the input string
+ * @param pos the position to start scanning from
+ * @returns 
+ */
+export function scan_number(input: string, pos: number): [Token, number] {
+    const [token_value, next] = scan_decimal(input, pos);
+
+    return [{ v: token_value, token_type: "number" }, next];
+}
+
+function scan_decimal(input: string, starting_position: number): [string, number] {
+    let current_value = "";
+    let pos = starting_position;
+
+    while (pos < input.length) {
+        const c = input[pos];
+
+        if (c === ".") {
+            // todo
+            throw new Error("Not implemented");
+        }
+        else if (c == "e" || c == "E") {
+            // todo
+            throw new Error("Not implemented");
+        }
+        else if (is_digit(c)) {
+            current_value += c;
+            pos += 1;
+        }
+        else {
+            break;
+        }
+
+    }
+
+    return [current_value, pos];
+}
+
+

lexer/string_lexer.test.ts

@@ -0,0 +1,32 @@
+import { expect, test, describe } from "bun:test";
+import { scan_string } from "./string_lexer";
+
+describe("String Lexer", () => {
+    test("should scan an empty string", () => {
+        const code = "\"\"";
+        const token = scan_string(code, 0);
+
+        expect(token).toEqual([{ v: "\"\"", token_type: "string" }, 2]);
+    });
+
+    test("should scan a string with a single character", () => {
+        const code = "\"a\"";
+        const token = scan_string(code, 0);
+
+        expect(token).toEqual([{ v: "\"a\"", token_type: "string" }, 3]);
+    });
+
+    test("should scan a string with multiple characters", () => {
+        const code = "\"hello\"";
+        const token = scan_string(code, 0);
+
+        expect(token).toEqual([{ v: "\"hello\"", token_type: "string" }, 7]);
+    });
+    
+    test("should scan a string with an escape character", () => {
+        const code = "\"\\n\"";
+        const token = scan_string(code, 0);
+
+        expect(token).toEqual([{ v: "\"\\n\"", token_type: "string" }, 4]);
+    });
+});

lexer/string_lexer.ts

@@ -0,0 +1,49 @@
+import type { Token } from "./lexer.ts";
+
+export function scan_string(input: string, starting_position: number): [Token, number] {
+    let value = "\"";
+    let pos = starting_position + 1;
+
+    while (pos < input.length) {
+        const c = input[pos];
+
+        if (c === "\"") {
+            value += c;
+            pos += 1;
+            break;
+        }
+        if (c === "\n") {
+            // todo: error handling, return an error indicator and the caller should render a red wavy underline
+            break;
+        }
+        if (c === "\\") {
+            const next_char = input[pos + 1];
+            value += handle_escape_char(next_char);
+            pos += 2;
+            continue;
+        }
+
+        value += c;
+        pos += 1;
+    }
+
+    return [{ v: value, token_type: "string" }, pos];
+}
+
+function handle_escape_char(next_char: string): string {
+    switch (next_char) {
+        case "n":
+            return "\\n"
+        case "t":
+            return "\\t"
+        case "r":
+            return "\\r"
+        case "\"":
+            return "\\\""
+        case "\\":
+            return "\\\\"
+        default:
+            return "\\" + next_char
+    }
+}
+

lexer/utils.ts

@@ -0,0 +1,15 @@
+export function is_digit(c: string): boolean {
+    return c >= '0' && c <= '9';
+}
+
+export function is_lowercase(c: string): boolean {
+    return c >= 'a' && c <= 'z';
+}
+
+export function is_uppercase(c: string): boolean {
+    return c >= 'A' && c <= 'Z';
+}
+
+export function is_identifier_char(c: string): boolean {
+    return is_lowercase(c) || is_uppercase(c) || is_digit(c) || c === '_';
+}

md/learn/index.md

@@ -76,7 +76,7 @@ val has_key = haystack.contains("needle")
 ]
 
 // THP
-Obj {
+.{
     names: #("Toni", "Stark"), // Tuple
     age: 33,
     numbers: [32, 64, 128]

package.json

@@ -5,7 +5,9 @@
   "main": "index.js",
   "scripts": {
     "generate": "md-docs",
-    "dev": "concurrently -k \"pnpm tailwind:watch\" \"serve ./static/ -l 3333\"",
+    "bundle": "bun build ./lexer/highlighter.ts --outdir ./static/js/ --format esm --minify",
+    "dev": "concurrently -k \"tailwindcss -i ./tailwind.css -o ./static/css/out.css --watch\" \"serve ./static/ -l 3333\"",
+    "codemirror": "esbuild --bundle ./static/js/codemirror.js  --outfile=./static/js/codemirror.min.js --minify --sourcemap",
     "tailwind:watch": "tailwindcss -i ./tailwind.css -o ./static/css/out.css --watch",
     "tailwind:build": "tailwindcss -i ./tailwind.css -o ./static/css/out.css --minify"
   },
@@ -13,10 +15,16 @@
   "author": "",
   "license": "ISC",
   "dependencies": {
+    "@types/bun": "^1.0.10",
+    "codejar": "^4.2.0",
     "tailwindcss": "^3.2.7"
   },
   "devDependencies": {
     "concurrently": "^8.2.0",
-    "serve": "^14.2.0"
+    "serve": "^14.2.1",
+    "bun-types": "latest"
+  },
+  "peerDependencies": {
+    "typescript": "^5.0.0"
   }
 }

static/index.html

@@ -13,7 +13,7 @@
     <link rel="preconnect" href="https://fonts.googleapis.com">
     <link rel="preconnect" href="https://fonts.gstatic.com" crossorigin>
     <link
-        href="https://fonts.googleapis.com/css2?family=Fira+Sans:wght@400;500;600;700;800;900&family=Fira+Code&family=Inter:ital,wght@0,400;1,700&display=swap"
+        href="https://fonts.googleapis.com/css2?family=Fira+Sans:wght@400;500;600;700;800;900&family=Fira+Code&display=swap"
         rel="stylesheet">
 </head>
 
@@ -26,7 +26,7 @@
         </div>
     </nav>
 
-    <div class="container mx-auto py-16 grid grid-cols-[5fr_4fr] gap-4 px-10">
+    <div class="container mx-auto py-16 grid grid-cols-[auto_32rem] gap-4 px-10">
         <div class="pl-10 table">
             <div class="table-cell align-middle">
                 <h1 class="font-display font-bold text-5xl leading-tight">
@@ -43,21 +43,15 @@
                 <br>
                 <br>
                 <div class="text-center">
-                    <a 
-            class="inline-block font-display text-lg border-2 border-pink-400 hover:bg-pink-400 transition-colors
-                hover:text-c-bg py-3 px-8 mx-6 rounded"
-            href="/learn/"
-        >
-            Learn
-        </a>
+                    <a class="inline-block font-display text-lg border-2 border-pink-400 hover:bg-pink-400 transition-colors
+                hover:text-c-bg py-3 px-8 mx-6 rounded" href="/learn/">
+                        Learn
+                    </a>
 
-        <a 
-            class="inline-block font-display text-lg border-2 border-sky-400 py-3 px-8 mx-6 rounded
-                transition-colors hover:text-black hover:bg-sky-400" 
-            href="/install/"
-        >
-            Install
-        </a>
+                    <a class="inline-block font-display text-lg border-2 border-sky-400 py-3 px-8 mx-6 rounded
+                transition-colors hover:text-black hover:bg-sky-400" href="/install/">
+                        Install
+                    </a>
                 </div>
             </div>
         </div>
@@ -76,35 +70,39 @@
                 </g>
             </svg>
             <div class="h-1"></div>
-            <pre style="padding: 0 !important; border: none !important;">
-                <code class="language-thp">
-                    // Actual generics & sum types
-                    fun find_person(Int person_id) -> Result[String, String] {
-                        // Easy, explicit error bubbling
-                        try Person::find_by_id(person_id)
-                    }
-
-                    val id = POST::get("person_id") ?? exit("Null person_id")
-                    // Errors as values
-                    val person = try find_person(person_id: id) with error {
-                        eprint("Error: {error}")
-                        exit("Person not found")
-                    }
-
-                    // First class HTML-like templates & components
-                    print(
-                        &lt;a href="/person/reports/{person.id}"&gt;
-                            welcome, {person.name}
-                        &lt;/a&gt;
-                    )
-                    // And more!
-                </code>
-            </pre>
+            <div id="editor" class="font-mono language-thp"></div>
         </div>
     </div>
 
-    <script src="/js/prism.min.js"></script>
-    <script src="/js/prism.thp.js"></script>
+    <script src="/js/highlighter.js"></script>
+    <script>
+        let jar = CodeJar(document.getElementById("editor"), thp_highlighter, {
+            tab: "    ",
+        });
+
+        jar.updateCode(
+            `// Actual generics & sum types
+fun find_person(Int person_id) -> Result[String, String] {
+    // Easy, explicit error bubbling
+    try Person::find_by_id(person_id)
+}
+
+val id = POST::get("person_id") ?? exit("Null person_id")
+// Errors as values
+val person = try find_person(person_id: id) with error {
+    eprint("Error: {error}")
+    exit("Person not found")
+}
+
+// First class HTML-like templates & components
+print(
+    <a href="/person/reports/{person.id}">
+        welcome, {person.name}
+    </a>
+)
+// And more!`
+        )
+    </script>
 </body>
 
 </html>

static/js/prism.thp.js

@@ -1,25 +0,0 @@
-Prism.languages.thp = {
-    "comment": [
-        {
-            pattern: /(^|[^\\])\/\*[\s\S]*?(?:\*\/|$)/,
-            lookbehind: true,
-            greedy: true,
-        },
-        {
-            pattern: /(^|[^\\:])\/\/.*/,
-            lookbehind: true,
-            greedy: true,
-        },
-    ],
-    "string": {
-        pattern: /(["])(?:\\(?:\r\n|[\s\S])|(?!\1)[^\\\r\n])*\1/,
-        greedy: true,
-    },
-    "keyword": /\b(?:case|static|const|enum|loop|use|break|catch|continue|do|else|finally|for|fun|if|in|fn|nil|return|throw|try|while|type|match|with|of|abstract|class|interface|private|pub|map|override|open|init|val|var|mut|clone)\b/,
-    "number": /\b0x[\da-f]+\b|(?:\b\d+(?:\.\d*)?|\B\.\d+)(?:e[+-]?\d+)?/i,
-    "operator": /[<>]=?|[!=]=?=?|--?|\$|\+\+?|&&?|\|\|?|[?*/~^%]/,
-    "punctuation": /[{}[\];(),.]/,
-    "boolean": /\b(?:false|true)\b/,
-    "class-name": /\b[A-Z][a-zA-Z_0-9]*\b/,
-    "variable": /\b[a-z_0-9][a-zA-Z_0-9]+:/,
-};

static/template.html

@@ -49,8 +49,25 @@
         </main>
     </div>
 
-    <script src="/js/prism.min.js"></script>
-    <script src="/js/prism.thp.js"></script>
-</body>
+    <script src="/js/highlighter.js"></script>
+    <script>
+        // Add an editor to all code samples
 
+        const code_elements = document.querySelectorAll(".language-thp");
+
+        for (const el of [...code_elements]) {
+            const pre_parent = el.parentElement;
+            const new_div = document.createElement("div");
+            const code = el.innerHTML;
+            
+            el.parentElement.classList.add("language-thp");
+            pre_parent.removeChild(el);
+            pre_parent.appendChild(new_div);
+            
+            CodeJar(new_div, thp_highlighter, {
+                tab: "    "
+            }).updateCode(code);
+        }
+    </script>
+</body>
 </html>

tailwind.config.js

@@ -17,7 +17,7 @@ module.exports = {
             }
         },
         fontFamily: {
-            "mono": ["'Fira Code'", "Inconsolata", "Iosevka", "monospace"],
+            "mono": ["Iosevka", "monospace"],
             "display": ["Inter", "'Josefin Sans'", "'Fugaz One'", "sans-serif"],
             "body": ["'Fira Sans'", "Inter", "sans-serif"],
         },

tsconfig.json

@@ -0,0 +1,27 @@
+{
+  "compilerOptions": {
+    // Enable latest features
+    "lib": ["ESNext"],
+    "target": "ESNext",
+    "module": "ESNext",
+    "moduleDetection": "force",
+    "jsx": "react-jsx",
+    "allowJs": true,
+
+    // Bundler mode
+    "moduleResolution": "bundler",
+    "allowImportingTsExtensions": true,
+    "verbatimModuleSyntax": true,
+    "noEmit": true,
+
+    // Best practices
+    "strict": true,
+    "skipLibCheck": true,
+    "noFallthroughCasesInSwitch": true,
+
+    // Some stricter flags
+    "noUnusedLocals": true,
+    "noUnusedParameters": true,
+    "noPropertyAccessFromIndexSignature": true
+  }
+}