chushihua

2026-01-26 23:20:48 +08:00
commit 7b5aab0206
22521 changed files with 3300090 additions and 0 deletions
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+'use strict';
+
+exports.__esModule = true;
+
+var _typeof = typeof Symbol === "function" && typeof Symbol.iterator === "symbol" ? function (obj) { return typeof obj; } : function (obj) { return obj && typeof Symbol === "function" && obj.constructor === Symbol && obj !== Symbol.prototype ? "symbol" : typeof obj; };
+
+var _ariaUtils = require('./aria-utils');
+
+var _ariaUtils2 = _interopRequireDefault(_ariaUtils);
+
+function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }
+
+/**
+ * @constructor
+ * @desc Dialog object providing modal focus management.
+ *
+ * Assumptions: The element serving as the dialog container is present in the
+ * DOM and hidden. The dialog container has role='dialog'.
+ *
+ * @param dialogId
+ *          The ID of the element serving as the dialog container.
+ * @param focusAfterClosed
+ *          Either the DOM node or the ID of the DOM node to focus when the
+ *          dialog closes.
+ * @param focusFirst
+ *          Optional parameter containing either the DOM node or the ID of the
+ *          DOM node to focus when the dialog opens. If not specified, the
+ *          first focusable element in the dialog will receive focus.
+ */
+var aria = aria || {};
+var tabEvent;
+
+aria.Dialog = function (dialog, focusAfterClosed, focusFirst) {
+  var _this = this;
+
+  this.dialogNode = dialog;
+  if (this.dialogNode === null || this.dialogNode.getAttribute('role') !== 'dialog') {
+    throw new Error('Dialog() requires a DOM element with ARIA role of dialog.');
+  }
+
+  if (typeof focusAfterClosed === 'string') {
+    this.focusAfterClosed = document.getElementById(focusAfterClosed);
+  } else if ((typeof focusAfterClosed === 'undefined' ? 'undefined' : _typeof(focusAfterClosed)) === 'object') {
+    this.focusAfterClosed = focusAfterClosed;
+  } else {
+    this.focusAfterClosed = null;
+  }
+
+  if (typeof focusFirst === 'string') {
+    this.focusFirst = document.getElementById(focusFirst);
+  } else if ((typeof focusFirst === 'undefined' ? 'undefined' : _typeof(focusFirst)) === 'object') {
+    this.focusFirst = focusFirst;
+  } else {
+    this.focusFirst = null;
+  }
+
+  if (this.focusFirst) {
+    this.focusFirst.focus();
+  } else {
+    _ariaUtils2.default.focusFirstDescendant(this.dialogNode);
+  }
+
+  this.lastFocus = document.activeElement;
+  tabEvent = function tabEvent(e) {
+    _this.trapFocus(e);
+  };
+  this.addListeners();
+};
+
+aria.Dialog.prototype.addListeners = function () {
+  document.addEventListener('focus', tabEvent, true);
+};
+
+aria.Dialog.prototype.removeListeners = function () {
+  document.removeEventListener('focus', tabEvent, true);
+};
+
+aria.Dialog.prototype.closeDialog = function () {
+  var _this2 = this;
+
+  this.removeListeners();
+  if (this.focusAfterClosed) {
+    setTimeout(function () {
+      _this2.focusAfterClosed.focus();
+    });
+  }
+};
+
+aria.Dialog.prototype.trapFocus = function (event) {
+  if (_ariaUtils2.default.IgnoreUtilFocusChanges) {
+    return;
+  }
+  if (this.dialogNode.contains(event.target)) {
+    this.lastFocus = event.target;
+  } else {
+    _ariaUtils2.default.focusFirstDescendant(this.dialogNode);
+    if (this.lastFocus === document.activeElement) {
+      _ariaUtils2.default.focusLastDescendant(this.dialogNode);
+    }
+    this.lastFocus = document.activeElement;
+  }
+};
+
+exports.default = aria.Dialog;