Add code highlighting

assets/css/layout.css

@@ -45,6 +45,11 @@ pre code {
   padding: 0.6rem 1rem;
 }
 
+.highlight pre {
+  font-size: 0.9em;
+  padding: 0.6rem 1rem;
+}
+
 img {
   max-width: 100%;
 }

assets/css/prism.css

@@ -0,0 +1,140 @@
+/**
+ * prism.js default theme for JavaScript, CSS and HTML
+ * Based on dabblet (http://dabblet.com)
+ * @author Lea Verou
+ */
+
+code[class*="language-"],
+pre[class*="language-"] {
+	color: black;
+	background: none;
+	text-shadow: 0 1px white;
+	font-family: Consolas, Monaco, 'Andale Mono', 'Ubuntu Mono', monospace;
+	font-size: 1em;
+	text-align: left;
+	white-space: pre;
+	word-spacing: normal;
+	word-break: normal;
+	word-wrap: normal;
+	line-height: 1.5;
+
+	-moz-tab-size: 4;
+	-o-tab-size: 4;
+	tab-size: 4;
+
+	-webkit-hyphens: none;
+	-moz-hyphens: none;
+	-ms-hyphens: none;
+	hyphens: none;
+}
+
+pre[class*="language-"]::-moz-selection, pre[class*="language-"] ::-moz-selection,
+code[class*="language-"]::-moz-selection, code[class*="language-"] ::-moz-selection {
+	text-shadow: none;
+	background: #b3d4fc;
+}
+
+pre[class*="language-"]::selection, pre[class*="language-"] ::selection,
+code[class*="language-"]::selection, code[class*="language-"] ::selection {
+	text-shadow: none;
+	background: #b3d4fc;
+}
+
+@media print {
+	code[class*="language-"],
+	pre[class*="language-"] {
+		text-shadow: none;
+	}
+}
+
+/* Code blocks */
+pre[class*="language-"] {
+	padding: 1em;
+	margin: .5em 0;
+	overflow: auto;
+}
+
+:not(pre) > code[class*="language-"],
+pre[class*="language-"] {
+	background: #f5f2f0;
+}
+
+/* Inline code */
+:not(pre) > code[class*="language-"] {
+	padding: .1em;
+	border-radius: .3em;
+	white-space: normal;
+}
+
+.token.comment,
+.token.prolog,
+.token.doctype,
+.token.cdata {
+	color: slategray;
+}
+
+.token.punctuation {
+	color: #999;
+}
+
+.token.namespace {
+	opacity: .7;
+}
+
+.token.property,
+.token.tag,
+.token.boolean,
+.token.number,
+.token.constant,
+.token.symbol,
+.token.deleted {
+	color: #905;
+}
+
+.token.selector,
+.token.attr-name,
+.token.string,
+.token.char,
+.token.builtin,
+.token.inserted {
+	color: #690;
+}
+
+.token.operator,
+.token.entity,
+.token.url,
+.language-css .token.string,
+.style .token.string {
+	color: #9a6e3a;
+	/* This background color was intended by the author of this theme. */
+	background: hsla(0, 0%, 100%, .5);
+}
+
+.token.atrule,
+.token.attr-value,
+.token.keyword {
+	color: #07a;
+}
+
+.token.function,
+.token.class-name {
+	color: #DD4A68;
+}
+
+.token.regex,
+.token.important,
+.token.variable {
+	color: #e90;
+}
+
+.token.important,
+.token.bold {
+	font-weight: bold;
+}
+.token.italic {
+	font-style: italic;
+}
+
+.token.entity {
+	cursor: help;
+}

assets/css/themes/default-light.css

@@ -47,6 +47,13 @@ pre code {
   color: var(--text-color-dark-bg);
 }
 
+.highlight pre,
+.highlight code {
+  background-color: var(--background-color-body);
+  border: 2px solid #e8e3da;
+  color: var(--text-color-body);
+}
+
 dl dt {
   color: var(--text-color-discreet);
 }

config.ts

@@ -52,6 +52,15 @@ const config = {
   },
   query_timeout: parseInt(Deno.env.get("RELAY_TIMEOUT_MS") || "5000"),
   njump_url: Deno.env.get("NJUMP_URL") || "https://njump.me",
+  prism: {
+    // TODO make configurable via ENV
+    // Supported languages: https://app.unpkg.com/prismjs@1.29.0/files/components
+    extraLanguages: [
+      "bash",
+      "markdown",
+      "typescript"
+    ]
+  }
 };
 
 const staticUsersConfigured = Object.keys(staticUsers).length > 0;

deno.lock

@@ -54,6 +54,7 @@
     "npm:nostr-tools@^2.7.0": "2.10.4",
     "npm:nostr-wasm@0.1.0": "0.1.0",
     "npm:path-to-regexp@6.2.1": "6.2.1",
+    "npm:prismjs@1.29.0": "1.29.0",
     "npm:prismjs@^1.29.0": "1.29.0",
     "npm:sanitize-html@^2.13.0": "2.13.1",
     "npm:websocket-ts@^2.1.5": "2.1.5",
@@ -71,7 +72,7 @@
         "npm:marked-alert",
         "npm:marked-footnote",
         "npm:marked-gfm-heading-id",
-        "npm:prismjs",
+        "npm:prismjs@^1.29.0",
         "npm:sanitize-html"
       ]
     },

html.ts

@@ -19,6 +19,7 @@ function htmlLayout({ title, body, metaHtml }: HtmlLayoutOptions): string {
       <title>${title}</title>
       ${metaHtml || ""}
       <link rel="stylesheet" type="text/css" href="/assets/css/layout.css" />
+      <link rel="stylesheet" type="text/css" href="/assets/css/prism.css" />
       <link rel="stylesheet" type="text/css" href="/assets/css/themes/default-light.css" />
     </head>
     <body>

models/article.ts

@@ -4,6 +4,10 @@ import { NostrEvent as NEvent } from "@nostrify/nostrify";
 import { replaceNostrUris } from "../nostr/links.ts";
 import config from "../config.ts";
 
+for (const language of config.prism.extraLanguages) {
+  await import(`npm:prismjs@1.29.0/components/prism-${language}.js`);
+}
+
 export default class Article {
   event: NEvent;
 

prism.css

@@ -0,0 +1,140 @@
+/**
+ * prism.js default theme for JavaScript, CSS and HTML
+ * Based on dabblet (http://dabblet.com)
+ * @author Lea Verou
+ */
+
+code[class*="language-"],
+pre[class*="language-"] {
+	color: black;
+	background: none;
+	text-shadow: 0 1px white;
+	font-family: Consolas, Monaco, 'Andale Mono', 'Ubuntu Mono', monospace;
+	font-size: 1em;
+	text-align: left;
+	white-space: pre;
+	word-spacing: normal;
+	word-break: normal;
+	word-wrap: normal;
+	line-height: 1.5;
+
+	-moz-tab-size: 4;
+	-o-tab-size: 4;
+	tab-size: 4;
+
+	-webkit-hyphens: none;
+	-moz-hyphens: none;
+	-ms-hyphens: none;
+	hyphens: none;
+}
+
+pre[class*="language-"]::-moz-selection, pre[class*="language-"] ::-moz-selection,
+code[class*="language-"]::-moz-selection, code[class*="language-"] ::-moz-selection {
+	text-shadow: none;
+	background: #b3d4fc;
+}
+
+pre[class*="language-"]::selection, pre[class*="language-"] ::selection,
+code[class*="language-"]::selection, code[class*="language-"] ::selection {
+	text-shadow: none;
+	background: #b3d4fc;
+}
+
+@media print {
+	code[class*="language-"],
+	pre[class*="language-"] {
+		text-shadow: none;
+	}
+}
+
+/* Code blocks */
+pre[class*="language-"] {
+	padding: 1em;
+	margin: .5em 0;
+	overflow: auto;
+}
+
+:not(pre) > code[class*="language-"],
+pre[class*="language-"] {
+	background: #f5f2f0;
+}
+
+/* Inline code */
+:not(pre) > code[class*="language-"] {
+	padding: .1em;
+	border-radius: .3em;
+	white-space: normal;
+}
+
+.token.comment,
+.token.prolog,
+.token.doctype,
+.token.cdata {
+	color: slategray;
+}
+
+.token.punctuation {
+	color: #999;
+}
+
+.token.namespace {
+	opacity: .7;
+}
+
+.token.property,
+.token.tag,
+.token.boolean,
+.token.number,
+.token.constant,
+.token.symbol,
+.token.deleted {
+	color: #905;
+}
+
+.token.selector,
+.token.attr-name,
+.token.string,
+.token.char,
+.token.builtin,
+.token.inserted {
+	color: #690;
+}
+
+.token.operator,
+.token.entity,
+.token.url,
+.language-css .token.string,
+.style .token.string {
+	color: #9a6e3a;
+	/* This background color was intended by the author of this theme. */
+	background: hsla(0, 0%, 100%, .5);
+}
+
+.token.atrule,
+.token.attr-value,
+.token.keyword {
+	color: #07a;
+}
+
+.token.function,
+.token.class-name {
+	color: #DD4A68;
+}
+
+.token.regex,
+.token.important,
+.token.variable {
+	color: #e90;
+}
+
+.token.important,
+.token.bold {
+	font-weight: bold;
+}
+.token.italic {
+	font-style: italic;
+}
+
+.token.entity {
+	cursor: help;
+}