add docs about embedding LIPS REPL #372

jcubic · Aug 1, 2024 · 78593f5 · 78593f5
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+---
+sidebar_position: 9
+description: "Embedding the LIPS Scheme REPL"
+---
+
+# Embedding LIPS REPL
+
+To embed the LIPS REPL you need on your website you need:
+
+## A HTML Web page
+
+First you need to have a website where you want to embed the REPL. You can create simple HTML page
+if you don't have one already:
+
+```html
+<!DOCTYPE html>
+<html>
+  <head>
+    <title>LIPS Scheme REPL</title>
+  </head>
+  <body>
+  </body>
+</html>
+```
+
+## Create placeholder for the REPL
+
+Then you need to create a div that will hold the REPL UI.
+
+```html
+<div id="term"></div>
+```
+
+I usually name it `term` from terminal, because the REPL use [jQuery
+Terminal](https://terminal.jcubic.pl/) library. You don't need to use `id`, you can create any div you
+want, but you should be able to target it specifically with
+[CSS selector](https://developer.mozilla.org/en-US/docs/Learn/CSS/Building_blocks/Selectors).
+
+If you want full screen terminal you don't need to use the `<div>` and use `<body>` tag when
+creating the terminal.  It's described how at the end of the document.
+
+## Include main LIPS file
+
+Then you need to include LIPS:
+
+```html
+<script src="https://cdn.jsdelivr.net/npm/@jcubic/lips@beta/dist/lips.min.js" bootstrap></script>
+```
+
+Make sure you include `bootstrap` attribute, with it LIPS will load its standard library that is
+written in Scheme.
+
+If you want to have access to filesystem functions ([IO ports](/docs/scheme-intro/input-output)) you
+need to include browserFS before LIPS:
+
+```html
+<script src="https://cdn.jsdelivr.net/npm/[email protected]/dist/browserfs.min.js"></script>
+```
+
+## Include jQuery
+jQuery is a dependency for the [jQuery Terminal](https://terminal.jcubic.pl/).
+
+```html
+<script src="https://cdn.jsdelivr.net/npm/jquery"></script>
+```
+
+## Include jQuery Terminal library
+
+This is main library that add Terminal look and feel:
+
+```html
+<script src="https://cdn.jsdelivr.net/npm/jquery.terminal/js/jquery.terminal.min.js"></script>
+<link href="https://cdn.jsdelivr.net/npm/jquery.terminal/css/jquery.terminal.min.css" rel="stylesheet"/>
+```
+
+## Include Terminal LIPS REPL files
+
+This is the main code that use jQuery Terminal and its features to implement the REPL:
+
+```html
+<link href="https://cdn.jsdelivr.net/npm/@jcubic/lips@beta/lib/css/terminal.css"
+      rel="stylesheet"/>
+<script src="https://cdn.jsdelivr.net/npm/@jcubic/lips@beta/lib/js/terminal.js"></script>
+```
+
+## Include Prism files
+
+[PrismJS](https://prismjs.com/) is a library that you can use for the syntax hightlighting. It has
+generic Scheme support, but LIPS tweak that a bit and add support for LIPS Scheme specific syntax
+like literal Regular Expressions, or object literals.
+
+```html
+<script src="https://cdn.jsdelivr.net/combine/npm/prismjs/prism.js,npm/jquery.terminal/js/prism.js,npm/prismjs/components/prism-scheme.min.js"></script>
+<link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/terminal-prism/css/prism-coy.css"/>
+```
+
+`terminal-prism` npm package contain versions of the Prism CSS that is transformed for the jQuery Terminal.
+
+## JavaScript code
+This is the code that use features of jQuery Terminal and main Terminal LIPS code to create the working REPL:
+
+```javascript
+// Scheme syntax hightlighting
+$.terminal.syntax('scheme');
+
+const term = terminal({
+    selector: '#term', // you can use body for full screen terminal
+    dynamic: false, // dynamic scope, to have normal Scheme you should use false
+    name: 'demo', // name of the terminal if you want multiple REPL on same page
+    lips // LIPS namespace
+});
+```
+
+If you want LIPS greeting like in lips website you can also add this code:
+
+```javascript
+// LIPS Greetings
+const intro = `(λ LIPS) version ${lips.version}
+Copyright (c) 2018-${new Date().getFullYear()} [[!;;;;https://jcubic.pl/me]Jakub T. Jankiewicz]
+Type (env) to see environment with functions macros and variables
+You can also use (help obj)to display help for specific function or macro.
+Use (dir name) to get list of JavaScript properties and (apropos name)
+to display list of matched names in environment.
+`
+// use same hightlight for names in RegEx, so they are in color and have doc strings
+term.echo(intro.replace(/(\((?:env|dir|help|apropos)[^)]*\))/g, function(code) {
+    return $.terminal.prism('scheme', code, { echo: true });
+}), {
+    formatters: false
+});
+```
+
+## Wroking Demo
+
+Here is a working [Codepen REPL Demo](https://codepen.io/jcubic/pen/OJepZbd).