Add svelte markdown rendering

package-lock.json

@@ -8,6 +8,7 @@
 			"name": "website-frontend",
 			"version": "0.0.1",
 			"dependencies": {
+				"highlight.js": "^11.10.0",
 				"marked": "^13.0.2",
 				"moment": "^2.30.1",
 				"qs": "^6.12.2",
@@ -1028,6 +1029,14 @@
 				"node": ">= 0.4"
 			}
 		},
+		"node_modules/highlight.js": {
+			"version": "11.10.0",
+			"resolved": "https://registry.npmjs.org/highlight.js/-/highlight.js-11.10.0.tgz",
+			"integrity": "sha512-SYVnVFswQER+zu1laSya563s+F8VDGt7o35d4utbamowvUNLLMovFqwCLSocpZTz3MgaSRA1IbqRWZv97dtErQ==",
+			"engines": {
+				"node": ">=12.0.0"
+			}
+		},
 		"node_modules/immutable": {
 			"version": "4.3.6",
 			"resolved": "https://registry.npmjs.org/immutable/-/immutable-4.3.6.tgz",

package.json

@@ -28,6 +28,7 @@
 	},
 	"type": "module",
 	"dependencies": {
+		"highlight.js": "^11.10.0",
 		"marked": "^13.0.2",
 		"moment": "^2.30.1",
 		"qs": "^6.12.2",

src/components/atoms/Box.svelte

@@ -1,19 +1,19 @@
 <script lang="ts">
-import type { Snippet } from "svelte";
+  import type { Snippet } from "svelte";
 
-type Props = {
-	color?: string;
-	title?: string;
-	margin?: "slim" | "medium" | "wide";
-	children: Snippet;
-};
+  type Props = {
+    color?: string;
+    title?: string;
+    margin?: "slim" | "medium" | "wide";
+    children: Snippet;
+  };
 
-const {
-	color = "primary",
-	title,
-	margin = "medium",
-	children,
-}: Props = $props();
+  const {
+    color = "primary",
+    title,
+    margin = "medium",
+    children,
+  }: Props = $props();
 </script>
 
 <div
@@ -43,6 +43,7 @@ const {
         var(--box-color),
         var(--color-foreground) 90%
       );
+      --color-context: var(--box-border-color);
 
       border: 5px solid var(--box-border-color);
       border-radius: 10px;

src/components/atoms/Heading.svelte

@@ -0,0 +1,27 @@
+<script lang="ts">
+  import type { Snippet } from "svelte";
+
+  type Props = {
+    children: Snippet;
+    depth: number;
+  };
+
+  const { children, depth }: Props = $props();
+  if (depth < 0 || depth > 6) {
+    throw new Error("depth must be 0-6");
+  }
+</script>
+
+<svelte:element this={`h${depth}`} class="heading">
+  {@render children()}
+</svelte:element>
+
+<style lang="scss">
+  @layer component {
+    .heading {
+      font-family: var(--font-primary);
+      margin: 0.2em 0;
+      text-decoration: underline 0.2em var(--color-context);
+    }
+  }
+</style>

src/components/atoms/HighlightedCode.svelte

@@ -0,0 +1,31 @@
+<script lang="ts">
+  import hljs from "highlight.js";
+  import "highlight.js/styles/night-owl.css";
+
+  type Props = {
+    language?: string;
+    code: string;
+  };
+
+  const { language, code }: Props = $props();
+
+  const html: string = $derived.by(() => {
+    if (language) {
+      return hljs.highlight(code, { language }).value;
+    }
+    return hljs.highlightAuto(code).value;
+  });
+</script>
+
+<pre class="code">
+{@html html}
+</pre>
+
+<style lang="scss">
+  @layer component {
+    .code {
+      margin: 0;
+      font-family: var(--font-monospace);
+    }
+  }
+</style>

src/components/atoms/List.svelte

@@ -0,0 +1,30 @@
+<script lang="ts">
+  import type { Snippet } from "svelte";
+
+  type Props = {
+    children: Snippet;
+    ordered: boolean;
+    start: string;
+  };
+
+  const { children, ordered, start }: Props = $props();
+</script>
+
+{#if ordered}
+  <ol start={Number(start)} class="list ordered">
+    {@render children()}
+  </ol>
+{:else}
+  <ul class="list unordered">
+    {@render children()}
+  </ul>
+{/if}
+
+<style lang="scss">
+  @layer component {
+    .list {
+      margin: 0;
+      font-family: var(--font-readable);
+    }
+  }
+</style>

src/components/atoms/ListItem.svelte

@@ -0,0 +1,13 @@
+<script lang="ts">
+  import type { Snippet } from "svelte";
+
+  type Props = {
+    children: Snippet;
+  };
+
+  const { children }: Props = $props();
+</script>
+
+<li>
+  {@render children()}
+</li>

src/components/atoms/Paragraph.svelte

@@ -0,0 +1,22 @@
+<script lang="ts">
+  import type { Snippet } from "svelte";
+
+  type Props = {
+    children: Snippet;
+  };
+
+  const { children }: Props = $props();
+</script>
+
+<p class="paragraph">
+  {@render children()}
+</p>
+
+<style lang="scss">
+  @layer component {
+    .paragraph {
+      margin: 0;
+      font-family: var(--font-readable);
+    }
+  }
+</style>

src/components/atoms/Space.svelte

@@ -0,0 +1,10 @@
+<div class="space"></div>
+
+<style lang="scss">
+  @layer component {
+    .space {
+      display: block;
+      height: 1.2em;
+    }
+  }
+</style>

src/components/molecules/Markdown.svelte

@@ -1,5 +1,11 @@
 <script lang="ts">
   import { marked } from "marked";
+  import Heading from "../atoms/Heading.svelte";
+  import Paragraph from "../atoms/Paragraph.svelte";
+  import Space from "../atoms/Space.svelte";
+  import List from "../atoms/List.svelte";
+  import ListItem from "../atoms/ListItem.svelte";
+  import HighlightedCode from "../atoms/HighlightedCode.svelte";
 
   type Props = {
     markdown: string;
@@ -7,21 +13,58 @@
 
   const { markdown }: Props = $props();
 
-  const markdownHtml = marked(markdown);
+  const markdownTokens = marked.lexer(markdown);
 </script>
 
+{#snippet markdownToken(token)}
+  {#if token.type === "text"}
+    {token.text}
+  {:else if token.type === "heading"}
+    <Heading depth={token.depth}>
+      {token.text}
+    </Heading>
+  {:else if token.type === "paragraph"}
+    <Paragraph>
+      {token.text}
+    </Paragraph>
+  {:else if token.type === "code"}
+    <HighlightedCode language={token.language} code={token.text} />
+  {:else if token.type === "space"}
+    <Space />
+  {:else if token.type === "list"}
+    <List ordered={token.ordered} start={token.start}>
+      {#each token.items as item}
+        {@render markdownToken(item)}
+      {/each}
+    </List>
+  {:else if token.type === "list_item"}
+    <ListItem>
+      {#each token.tokens as itemToken}
+        {@render markdownToken(itemToken)}
+      {/each}
+    </ListItem>
+  {:else}
+    <pre>{JSON.stringify(token, null, 2)}</pre>
+  {/if}
+{/snippet}
+
 <div class="markdown">
-  {@html markdownHtml}
+  {#each markdownTokens as token}
+    {@render markdownToken(token)}
+  {/each}
 </div>
 
 <style lang="scss">
   @layer component {
     .markdown {
-      font-family: var(--font-readable);
       hyphens: auto;
       text-align: justify;
       cursor: text;
       font-size: 15pt;
     }
+
+    :global(.heading) {
+      font-size: 20pt;
+    }
   }
 </style>

src/global.scss

@@ -45,9 +45,11 @@
     --color-yellow: #f1fa8c;
     --color-image-frame: #fff;
     --color-image-frame-text: #204;
+    --color-context: var(--color-primary);
 
     --font-primary: Manifold, Lexend, Arial, Helvetica, sans-serif;
     --font-readable: "3270", Lexend, Arial, Helvetica, sans-serif;
+    --font-monospace: Fira Code, monospace;
     --font-page-title: GradientVector, Manifold, Lexend, Arial, Helvetica, sans-serif;
   }
 

src/routes/+page.svelte

@@ -48,8 +48,3 @@
     {/snippet}
   </ContainerDualColumn>
 </ContainerMedium>
-
-<style lang="scss">
-  @layer page {
-  }
-</style>