From 261548ff184926567a623e90df7954aeef842d59 Mon Sep 17 00:00:00 2001
From: Wojtek Kosior <koszko@koszko.org>
Date: Wed, 30 Jun 2021 12:28:05 +0200
Subject: emply an sh-based build system; make some changes to blocking

---
 content/freezer.js | 98 ++++++++++++++++++++++++++++--------------------------
 1 file changed, 50 insertions(+), 48 deletions(-)

(limited to 'content/freezer.js')

diff --git a/content/freezer.js b/content/freezer.js
index cdd0709..1696f53 100644
--- a/content/freezer.js
+++ b/content/freezer.js
@@ -6,58 +6,60 @@
  * Redistribution terms are gathered in the `copyright' file.
  */
 
-"use strict";
+const loaderAttributes = ["href", "src", "data"];
+const jsOrDataUrlRx = /^(?:data:(?:[^,;]*ml|unknown-content-type)|javascript:)/i;
 
-(() => {
-    const loaderAttributes = ["href", "src", "data"];
-    const jsOrDataUrlRx = /^(?:data:(?:[^,;]*ml|unknown-content-type)|javascript:)/i;
+function sanitize_attributes(element) {
+    if (element._frozen)
+	return;
+    let fa = [];
+    let loaders = [];
+    let attributes = element.attributes || [];
 
-    function sanitizeAttributes(element) {
-	if (element._frozen)
-	    return;
-	let fa = [];
-	let loaders = [];
-	for (let a of element.attributes) {
-	    let name = a.localName.toLowerCase();
-	    if (loaderAttributes.includes(name))
-		if (jsOrDataUrlRx.test(a.value))
-		    loaders.push(a);
+    for (let a of attributes) {
+	let name = a.localName.toLowerCase();
+	if (loaderAttributes.includes(name))
+	    if (jsOrDataUrlRx.test(a.value))
+		loaders.push(a);
 
-	    else if (name.startsWith("on")) {
-		console.debug("Removing", a, element.outerHTML);
-		fa.push(a.cloneNode());
-		a.value = "";
-		element[name] = null;
-	    }
+	else if (name.startsWith("on")) {
+	    console.debug("Removing", a, element.outerHTML);
+	    fa.push(a.cloneNode());
+	    a.value = "";
+	    element[name] = null;
 	}
-	if (loaders.length) {
-	    for (let a of loaders) {
-		fa.push(a.cloneNode());
-		a.value = "javascript://frozen";
-	    }
-	    if ("contentWindow" in element)
-		element.replaceWith(element = element.cloneNode(true));
-
+    }
+    if (loaders.length) {
+	for (let a of loaders) {
+	    fa.push(a.cloneNode());
+	    a.value = "javascript://frozen";
 	}
-	if (fa.length)
-	    element._frozenAttributes = fa;
-	element._frozen = true;
+	if ("contentWindow" in element)
+	    element.replaceWith(element = element.cloneNode(true));
+
     }
-    
-    function scriptSuppressor(nonce) {
-	const blockExecute = e => {
-	    if (document.readyState === 'complete') {
-		removeEventListener('beforescriptexecute', blockExecute, true);
-		return;
-	    }
-	    else if (e.isTrusted && e.target.getAttribute('nonce') !== nonce) { // Prevent blocking of injected scripts
-		e.preventDefault();
-		console.log('Suppressed script', e.target);
-	    }
-	};
-	return blockExecute;
+    if (fa.length)
+	element._frozenAttributes = fa;
+    element._frozen = true;
+}
+
+function script_suppressor(nonce) {
+    const blockExecute = e => {
+	if (document.readyState === 'complete') {
+	    removeEventListener('beforescriptexecute', blockExecute, true);
+	    return;
+	}
+	else if (e.isTrusted && e.target.getAttribute('nonce') !== nonce) { // Prevent blocking of injected scripts
+	    e.preventDefault();
+	    console.log('Suppressed script', e.target);
+	}
     };
-    
-    window.scriptSuppressor = scriptSuppressor;
-    window.sanitize_attributes = sanitizeAttributes;
-})();
+    return blockExecute;
+};
+
+/*
+ * EXPORTS_START
+ * EXPORT script_suppressor
+ * EXPORT sanitize_attributes
+ * EXPORTS_END
+ */
-- 
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