2 files changed, 179 insertions, 0 deletions
diff --git a/node_modules/@11ty/posthtml-urls/lib/defaultOptions.js b/node_modules/@11ty/posthtml-urls/lib/defaultOptions.js
new file mode 100644
index 0000000..eee863c
--- /dev/null
+++ b/node_modules/@11ty/posthtml-urls/lib/defaultOptions.js
@@ -0,0 +1,37 @@
+"use strict";
+const HTTP_EQUIV = "http-equiv";
+const REFRESH = "refresh";
+
+const isHttpEquiv = ({ attrs }) => {
+	return attrs && (HTTP_EQUIV in attrs) && attrs[HTTP_EQUIV].toLowerCase() === REFRESH;
+};
+
+// Fork: pruned some deprecated tag/attribute combos here.
+const DEFAULT_OPTIONS = {
+	filter: {
+		a: { href: true, ping: true },
+		area: { href: true, ping: true },
+		audio: { src: true },
+		base: { href: true },
+		blockquote: { cite: true },
+		button: { formaction: true },
+		del: { cite: true },
+		embed: { src: true },
+		form: { action: true },
+		iframe: { src: true },
+		img: { src: true, srcset: true },
+		input: { formaction: true, src: true },
+		ins: { cite: true },
+		link: { href: true },
+		meta: { content: isHttpEquiv },
+		object: { data: true },
+		q: { cite: true },
+		script: { src: true },
+		source: { src: true, srcset: true },
+		track: { src: true },
+		// video does not yet have srcset: https://scottjehl.com/posts/using-responsive-video/
+		video: { poster: true, src: true },
+	},
+};
+
+module.exports = DEFAULT_OPTIONS;
diff --git a/node_modules/@11ty/posthtml-urls/lib/index.js b/node_modules/@11ty/posthtml-urls/lib/index.js
new file mode 100644
index 0000000..f9a49f0
--- /dev/null
+++ b/node_modules/@11ty/posthtml-urls/lib/index.js
@@ -0,0 +1,142 @@
+"use strict";
+const DEFAULT_OPTIONS = require("./defaultOptions");
+const evaluateValue = require("evaluate-value");
+const list2Array = require("list-to-array");
+const parseMetaRefresh = require("http-equiv-refresh");
+const parseSrcset = require("parse-srcset");
+
+const CONTENT_ATTR = "content";
+const PING_ATTR = "ping";
+const SRCSET_ATTR = "srcset";
+
+const DELIMITER = ",";
+const EMPTY_STRING = "";
+const EMPTY_TAG_GROUP = Object.freeze({});
+const FUNCTION_TYPE = "function";
+const PRETTY_DELIMITER = ", ";
+
+
+
+const plugin = options =>
+{
+	const {eachURL, filter} = Object.assign({}, DEFAULT_OPTIONS, options);
+
+	if (typeof eachURL !== FUNCTION_TYPE)
+	{
+		throw new TypeError("eachURL option must be a function");
+	}
+
+	// const tagMatchers = Object.keys(filter).map(tagName => ({ tag: tagName }));
+
+	// Called by PostHTML
+	return tree =>
+	{
+		const promises = [];
+
+		tree.walk(node =>
+		// tree.match(tagMatchers, (node) =>
+		{
+			if (node.attrs === undefined) {
+				return node;
+			}
+
+			const tagGroup = filter[node.tag] || EMPTY_TAG_GROUP;
+
+			Object.keys(node.attrs).forEach(attrName =>
+			{
+				const isAcceptedTagAttr = attrName in tagGroup && evaluateValue(tagGroup[attrName], node, attrName);
+
+				if (isAcceptedTagAttr)
+				{
+					switch (attrName)
+					{
+						case CONTENT_ATTR:
+						{
+							promises.push( transformMetaRefresh(node, attrName, eachURL) );
+							break;
+						}
+						case PING_ATTR:
+						{
+							promises.push( transformCommaSeparated(node, attrName, eachURL) );
+							break;
+						}
+						case SRCSET_ATTR:
+						{
+							promises.push( transformSrcset(node, attrName, eachURL) );
+							break;
+						}
+						default:
+						{
+							promises.push( transformDefault(node, attrName, eachURL) );
+						}
+					}
+				}
+			});
+
+			return node;
+		});
+
+		return Promise.all(promises).then(() => tree);
+	};
+};
+
+
+
+const transformCommaSeparated = ({attrs, tag}, attrName, transformer) =>
+{
+	const urls = list2Array( attrs[attrName], DELIMITER );
+
+	if (urls.length > 0)
+	{
+		const promises = urls.map(value => Promise.resolve( transformer(value, attrName, tag) ));
+
+		return Promise.all(promises).then(newUrls => attrs[attrName] = newUrls.join(PRETTY_DELIMITER));
+	}
+};
+
+
+
+const transformDefault = ({attrs, tag}, attrName, transformer) =>
+{
+	return Promise.resolve( transformer( attrs[attrName], attrName, tag ) )
+	.then(newUrl => attrs[attrName] = newUrl);
+};
+
+
+
+const transformMetaRefresh = ({attrs, tag}, attrName, transformer) =>
+{
+	const {timeout, url} = parseMetaRefresh( attrs[attrName] );
+
+	if (timeout !== null)
+	{
+		return Promise.resolve( transformer(url || "", attrName, tag) )
+		.then(newUrl => attrs[attrName] = `${timeout}; url=${newUrl}`);
+	}
+};
+
+
+
+const transformSrcset = ({attrs, tag}, attrName, transformer) =>
+{
+	const values = parseSrcset( attrs[attrName] );
+
+	if (values.length > 0)
+	{
+		const promises = values.map(({d, h, url, w}) => Promise.resolve( transformer(url, attrName, tag) )
+		.then(newUrl =>
+		{
+			d = d !== undefined ? ` ${d}x` : EMPTY_STRING;
+			h = h !== undefined ? ` ${h}h` : EMPTY_STRING;
+			w = w !== undefined ? ` ${w}w` : EMPTY_STRING;
+
+			return `${newUrl}${w}${h}${d}`;
+		}));
+
+		return Promise.all(promises).then(newValues => attrs[attrName] = newValues.join(PRETTY_DELIMITER));
+	}
+};
+
+
+
+module.exports = plugin;