+
+/**
+ * Determine whether |data| is delimited by CR, CRLF, LF, LFCR.
+ * @param {string} data
+ * @return {?string} the delimiter that was detected (or null on failure).
+ */
+Dygraph.detectLineDelimiter = function(data) {
+ for (var i = 0; i < data.length; i++) {
+ var code = data.charAt(i);
+ if (code === '\r') {
+ // Might actually be "\r\n".
+ if (((i + 1) < data.length) && (data.charAt(i + 1) === '\n')) {
+ return '\r\n';
+ }
+ return code;
+ }
+ if (code === '\n') {
+ // Might actually be "\n\r".
+ if (((i + 1) < data.length) && (data.charAt(i + 1) === '\r')) {
+ return '\n\r';
+ }
+ return code;
+ }
+ }
+
+ return null;
+};
+
+/**
+ * Is one element contained by another?
+ * @param {Element} containee The contained element.
+ * @param {Element} container The container element.
+ * @return {boolean} Whether containee is inside (or equal to) container.
+ * @private
+ */
+Dygraph.isElementContainedBy = function(containee, container) {
+ if (container === null || containee === null) {
+ return false;
+ }
+ while (containee && containee !== container) {
+ containee = containee.parentNode;
+ }
+ return (containee === container);
+};