Engage!

1 files changed, 121 insertions, 0 deletions

diff --git a/llama.cpp/tools/server/webui/src/lib/markdown/literal-html.ts b/llama.cpp/tools/server/webui/src/lib/markdown/literal-html.ts
new file mode 100644
index 0000000..d4ace01
--- /dev/null
+++ b/llama.cpp/tools/server/webui/src/lib/markdown/literal-html.ts
@@ -0,0 +1,121 @@
+import type { Plugin } from 'unified';
+import { visit } from 'unist-util-visit';
+import type { Break, Content, Paragraph, PhrasingContent, Root, Text } from 'mdast';
+import { LINE_BREAK, NBSP, PHRASE_PARENTS, TAB_AS_SPACES } from '$lib/constants/literal-html';
+
+/**
+ * remark plugin that rewrites raw HTML nodes into plain-text equivalents.
+ *
+ * remark parses inline HTML into `html` nodes even when we do not want to render
+ * them. We turn each of those nodes into regular text (plus `<br>` break markers)
+ * so the downstream rehype pipeline escapes the characters instead of executing
+ * them. Leading spaces and tab characters are converted to non‑breaking spaces to
+ * keep indentation identical to the original author input.
+ */
+
+function preserveIndent(line: string): string {
+	let index = 0;
+	let output = '';
+
+	while (index < line.length) {
+		const char = line[index];
+
+		if (char === ' ') {
+			output += NBSP;
+			index += 1;
+			continue;
+		}
+
+		if (char === '\t') {
+			output += TAB_AS_SPACES;
+			index += 1;
+			continue;
+		}
+
+		break;
+	}
+
+	return output + line.slice(index);
+}
+
+function createLiteralChildren(value: string): PhrasingContent[] {
+	const lines = value.split(LINE_BREAK);
+	const nodes: PhrasingContent[] = [];
+
+	for (const [lineIndex, rawLine] of lines.entries()) {
+		if (lineIndex > 0) {
+			nodes.push({ type: 'break' } as Break as unknown as PhrasingContent);
+		}
+
+		nodes.push({
+			type: 'text',
+			value: preserveIndent(rawLine)
+		} as Text as unknown as PhrasingContent);
+	}
+
+	if (!nodes.length) {
+		nodes.push({ type: 'text', value: '' } as Text as unknown as PhrasingContent);
+	}
+
+	return nodes;
+}
+
+export const remarkLiteralHtml: Plugin<[], Root> = () => {
+	return (tree) => {
+		visit(tree, 'html', (node, index, parent) => {
+			if (!parent || typeof index !== 'number') {
+				return;
+			}
+
+			const replacement = createLiteralChildren(node.value);
+
+			if (!PHRASE_PARENTS.has(parent.type as string)) {
+				const paragraph: Paragraph = {
+					type: 'paragraph',
+					children: replacement as Paragraph['children'],
+					data: { literalHtml: true }
+				};
+
+				const siblings = parent.children as unknown as Content[];
+				siblings.splice(index, 1, paragraph as unknown as Content);
+
+				if (index > 0) {
+					const previous = siblings[index - 1] as Paragraph | undefined;
+
+					if (
+						previous?.type === 'paragraph' &&
+						(previous.data as { literalHtml?: boolean } | undefined)?.literalHtml
+					) {
+						const prevChildren = previous.children as unknown as PhrasingContent[];
+
+						if (prevChildren.length) {
+							const lastChild = prevChildren[prevChildren.length - 1];
+
+							if (lastChild.type !== 'break') {
+								prevChildren.push({
+									type: 'break'
+								} as Break as unknown as PhrasingContent);
+							}
+						}
+
+						prevChildren.push(...(paragraph.children as unknown as PhrasingContent[]));
+
+						siblings.splice(index, 1);
+
+						return index;
+					}
+				}
+
+				return index + 1;
+			}
+
+			(parent.children as unknown as PhrasingContent[]).splice(
+				index,
+				1,
+				...(replacement as unknown as PhrasingContent[])
+			);
+
+			return index + replacement.length;
+		});
+	};
+};