ManageAssets: allow batch deletion of assets

templates/AssetManagementWrapper.php

@@ -0,0 +1,36 @@
+<?php
+/*****************************************************************************
+ * AssetManagementWrapper.php
+ * Defines asset management wrapper template.
+ *
+ * Kabuki CMS (C) 2013-2015, Aaron van Geffen
+ *****************************************************************************/
+
+class AssetManagementWrapper extends Template
+{
+	public function html_main()
+	{
+		echo '
+		<form action="" method="post">';
+
+		foreach ($this->_subtemplates as $template)
+			$template->html_main();
+
+		echo '
+		</form>
+		<script type="text/javascript" defer="defer">
+			const allAreSelected = () => {
+				return document.querySelectorAll(".asset_select").length ===
+					document.querySelectorAll(".asset_select:checked").length;
+			};
+
+			const selectAll = document.getElementById("selectall");
+			selectAll.addEventListener("change", event => {
+				const newSelectedState = !allAreSelected();
+				document.querySelectorAll(".asset_select").forEach(el => {
+					el.checked = newSelectedState;
+				});
+			});
+		</script>';
+	}
+}