update viz 2 to use the newest version, which has some performance improvements and is easier to read the code for. also update the description

1 files changed, 67 insertions, 1 deletions

diff --git a/assets/viz/2/goog/html/safestylesheet.js b/assets/viz/2/goog/html/safestylesheet.js
index 65a81b0..cdd9e31 100644
--- a/assets/viz/2/goog/html/safestylesheet.js
+++ b/assets/viz/2/goog/html/safestylesheet.js
@@ -22,6 +22,8 @@ goog.provide('goog.html.SafeStyleSheet');
 
 goog.require('goog.array');
 goog.require('goog.asserts');
+goog.require('goog.html.SafeStyle');
+goog.require('goog.object');
 goog.require('goog.string');
 goog.require('goog.string.Const');
 goog.require('goog.string.TypedString');
@@ -84,7 +86,7 @@ goog.html.SafeStyleSheet = function() {
   /**
    * A type marker used to implement additional run-time type checking.
    * @see goog.html.SafeStyleSheet#unwrap
-   * @const
+   * @const {!Object}
    * @private
    */
   this.SAFE_STYLE_SHEET_TYPE_MARKER_GOOG_HTML_SECURITY_PRIVATE_ =
@@ -109,6 +111,70 @@ goog.html.SafeStyleSheet.TYPE_MARKER_GOOG_HTML_SECURITY_PRIVATE_ = {};
 
 
 /**
+ * Creates a style sheet consisting of one selector and one style definition.
+ * Use {@link goog.html.SafeStyleSheet.concat} to create longer style sheets.
+ * This function doesn't support @import, @media and similar constructs.
+ * @param {string} selector CSS selector, e.g. '#id' or 'tag .class, #id'. We
+ *     support CSS3 selectors: https://w3.org/TR/css3-selectors/#selectors.
+ * @param {!goog.html.SafeStyle.PropertyMap|!goog.html.SafeStyle} style Style
+ *     definition associated with the selector.
+ * @return {!goog.html.SafeStyleSheet}
+ * @throws {Error} If invalid selector is provided.
+ */
+goog.html.SafeStyleSheet.createRule = function(selector, style) {
+  if (goog.string.contains(selector, '<')) {
+    throw Error('Selector does not allow \'<\', got: ' + selector);
+  }
+
+  // Remove strings.
+  var selectorToCheck =
+      selector.replace(/('|")((?!\1)[^\r\n\f\\]|\\[\s\S])*\1/g, '');
+
+  // Check characters allowed in CSS3 selectors.
+  if (!/^[-_a-zA-Z0-9#.:* ,>+~[\]()=^$|]+$/.test(selectorToCheck)) {
+    throw Error(
+        'Selector allows only [-_a-zA-Z0-9#.:* ,>+~[\\]()=^$|] and ' +
+        'strings, got: ' + selector);
+  }
+
+  // Check balanced () and [].
+  if (!goog.html.SafeStyleSheet.hasBalancedBrackets_(selectorToCheck)) {
+    throw Error('() and [] in selector must be balanced, got: ' + selector);
+  }
+
+  if (!(style instanceof goog.html.SafeStyle)) {
+    style = goog.html.SafeStyle.create(style);
+  }
+  var styleSheet = selector + '{' + goog.html.SafeStyle.unwrap(style) + '}';
+  return goog.html.SafeStyleSheet
+      .createSafeStyleSheetSecurityPrivateDoNotAccessOrElse(styleSheet);
+};
+
+
+/**
+ * Checks if a string has balanced () and [] brackets.
+ * @param {string} s String to check.
+ * @return {boolean}
+ * @private
+ */
+goog.html.SafeStyleSheet.hasBalancedBrackets_ = function(s) {
+  var brackets = {'(': ')', '[': ']'};
+  var expectedBrackets = [];
+  for (var i = 0; i < s.length; i++) {
+    var ch = s[i];
+    if (brackets[ch]) {
+      expectedBrackets.push(brackets[ch]);
+    } else if (goog.object.contains(brackets, ch)) {
+      if (expectedBrackets.pop() != ch) {
+        return false;
+      }
+    }
+  }
+  return expectedBrackets.length == 0;
+};
+
+
+/**
  * Creates a new SafeStyleSheet object by concatenating values.
  * @param {...(!goog.html.SafeStyleSheet|!Array<!goog.html.SafeStyleSheet>)}
  *     var_args Values to concatenate.