Add vectortile branch

2015-09-10 15:23:57 +02:00
parent 57ee7f52fd
commit 962473c3ab
3201 changed files with 978141 additions and 0 deletions
@@ -0,0 +1,87 @@
+// Copyright 2011 The Closure Library Authors. All Rights Reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS-IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+/**
+ * @fileoverview Helper object used by modal elements to control aria
+ * visibility of the rest of the page.
+ */
+
+goog.provide('goog.ui.ModalAriaVisibilityHelper');
+
+goog.require('goog.a11y.aria');
+goog.require('goog.a11y.aria.State');
+
+
+
+/**
+ * Helper object to control aria visibility of the rest of the page (background)
+ * for a given element. Example usage is to restrict screenreader focus to
+ * a modal popup while it is visible.
+ *
+ * WARNING: This will work only if the element is rendered directly in the
+ * 'body' element.
+ *
+ * @param {!Element} element The given element.
+ * @param {!goog.dom.DomHelper} domHelper DomHelper for the page.
+ * @constructor
+ */
+goog.ui.ModalAriaVisibilityHelper = function(element, domHelper) {
+  /**
+   * @private {!Element}
+   */
+  this.element_ = element;
+
+  /**
+   * @private {!goog.dom.DomHelper}
+   */
+  this.dom_ = domHelper;
+};
+
+
+/**
+ * The elements set to aria-hidden when the popup was made visible.
+ * @type {Array<!Element>}
+ * @private
+ */
+goog.ui.ModalAriaVisibilityHelper.prototype.hiddenElements_;
+
+
+/**
+ * Sets aria-hidden on the rest of the page to restrict screen reader focus.
+ * Top-level elements with an explicit aria-hidden state are not altered.
+ * @param {boolean} hide Whether to hide or show the rest of the page.
+ */
+goog.ui.ModalAriaVisibilityHelper.prototype.setBackgroundVisibility = function(
+    hide) {
+  if (hide) {
+    if (!this.hiddenElements_) {
+      this.hiddenElements_ = [];
+    }
+    var topLevelChildren = this.dom_.getChildren(this.dom_.getDocument().body);
+    for (var i = 0; i < topLevelChildren.length; i++) {
+      var child = topLevelChildren[i];
+      if (child != this.element_ &&
+          !goog.a11y.aria.getState(child, goog.a11y.aria.State.HIDDEN)) {
+        goog.a11y.aria.setState(child, goog.a11y.aria.State.HIDDEN, true);
+        this.hiddenElements_.push(child);
+      }
+    }
+  } else if (this.hiddenElements_) {
+    for (var i = 0; i < this.hiddenElements_.length; i++) {
+      goog.a11y.aria.removeState(
+          this.hiddenElements_[i], goog.a11y.aria.State.HIDDEN);
+    }
+    this.hiddenElements_ = null;
+  }
+};