add link to invert headline/article selection (closes #216)

functions.php

@@ -3918,6 +3918,7 @@
 				$sel_all_link = "javascript:selectTableRowsByIdPrefix('headlinesList', 'RROW-', 'RCHK-', true, '', true)";
 				$sel_unread_link = "javascript:selectTableRowsByIdPrefix('headlinesList', 'RROW-', 'RCHK-', true, 'Unread', true)";
 				$sel_none_link = "javascript:selectTableRowsByIdPrefix('headlinesList', 'RROW-', 'RCHK-', false)";
+				$sel_inv_link = "javascript:invertHeadlineSelection()";
 
 				$tog_unread_link = "javascript:selectionToggleUnread()";
 				$tog_marked_link = "javascript:selectionToggleMarked()";
@@ -3929,6 +3930,8 @@
 				$sel_unread_link = "javascript:cdmSelectArticles('unread')";
 				$sel_none_link = "javascript:cdmSelectArticles('none')";
 
+				$sel_inv_link = "javascript:invertHeadlineSelection()";
+
 				$tog_unread_link = "javascript:selectionToggleUnread(true)";
 				$tog_marked_link = "javascript:selectionToggleMarked(true)";
 				$tog_published_link = "javascript:selectionTogglePublished(true)";
@@ -3945,6 +3948,7 @@
 						".__('Select:')."
 							<a href=\"$sel_all_link\">".__('All')."</a>,
 							<a href=\"$sel_unread_link\">".__('Unread')."</a>,
+							<a href=\"$sel_inv_link\">".__('Invert')."</a>,
 							<a href=\"$sel_none_link\">".__('None')."</a></li>
 						<li class=\"vsep\">&nbsp;</li>
 						<li class=\"top\">".__('Actions...')."<ul>

viewfeed.js

@@ -1850,6 +1850,45 @@ function hideReadHeadlines() {
 	} 
 }
 
+function invertHeadlineSelection() {
+	try {
+		var rows = new Array();
+		var r = false;
+		
+		if (!isCdmMode()) {		
+			r = document.getElementsByTagName("TR");
+		} else {
+			r = document.getElementsByTagName("DIV");
+		}
+
+		for (var i = 0; i < r.length; i++) {
+			if (r[i].id && r[i].id.match("RROW-")) {
+				rows.push(r[i]);
+			}
+		}
+		
+		for (var i = 0; i < rows.length; i++) {
+			var nc = rows[i].className;
+			var id = rows[i].id.replace("RROW-", "");
+			var cb = document.getElementById("RCHK-" + id);
+
+			if (!rows[i].className.match("Selected")) {
+				nc = nc + "Selected";
+				cb.checked = true;
+			} else {
+				nc = nc.replace("Selected", "");
+				cb.checked = false;
+			}
+
+			rows[i].className = nc;
+
+		}
+
+	} catch (e) {
+		exception_error("invertHeadlineSelection", e);
+	}
+}
+
 function getArticleUnderPointer() {
 	return post_under_pointer;
 }