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https://github.com/jellyfin/jellyfin-web
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This commit is contained in:
Luke Pulverenti
parent
8dd2c5d717
commit
cc428aac1d
34 changed files with 814 additions and 549 deletions
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@ -55,59 +55,27 @@ subject to an additional IP rights grant found at http://polymer.github.io/PATEN
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listeners: {
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'focus': '_onFocus',
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'keydown': '_onKeydown'
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'keydown': '_onKeydown',
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'iron-items-changed': '_onIronItemsChanged'
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},
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keyBindings: {
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'up': '_onUpKey',
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'down': '_onDownKey',
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'esc': '_onEscKey',
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'enter': '_onEnterKey',
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'shift+tab:keydown': '_onShiftTabDown'
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},
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_updateMultiselectable: function(multi) {
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if (multi) {
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this.setAttribute('aria-multiselectable', 'true');
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} else {
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this.removeAttribute('aria-multiselectable');
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}
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},
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_onShiftTabDown: function() {
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var oldTabIndex;
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Polymer.IronMenuBehaviorImpl._shiftTabPressed = true;
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oldTabIndex = this.getAttribute('tabindex');
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this.setAttribute('tabindex', '-1');
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this.async(function() {
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this.setAttribute('tabindex', oldTabIndex);
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Polymer.IronMenuBehaviorImpl._shiftTabPressed = false;
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// Note: polymer/polymer#1305
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}, 1);
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},
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_applySelection: function(item, isSelected) {
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if (isSelected) {
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item.setAttribute('aria-selected', 'true');
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} else {
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item.removeAttribute('aria-selected');
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}
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Polymer.IronSelectableBehavior._applySelection.apply(this, arguments);
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},
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_focusedItemChanged: function(focusedItem, old) {
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old && old.setAttribute('tabindex', '-1');
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if (focusedItem) {
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focusedItem.setAttribute('tabindex', '0');
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focusedItem.focus();
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}
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attached: function() {
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this._resetTabindices();
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},
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/**
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* Selects the given value. If the `multi` property is true, then the selected state of the
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* `value` will be toggled; otherwise the `value` will be selected.
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*
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* @param {string} value the value to select.
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*/
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select: function(value) {
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if (this._defaultFocusAsync) {
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this.cancelAsync(this._defaultFocusAsync);
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@ -119,6 +87,152 @@ subject to an additional IP rights grant found at http://polymer.github.io/PATEN
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Polymer.IronMultiSelectableBehaviorImpl.select.apply(this, arguments);
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},
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/**
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* Resets all tabindex attributes to the appropriate value based on the
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* current selection state. The appropriate value is `0` (focusable) for
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* the default selected item, and `-1` (not keyboard focusable) for all
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* other items.
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*/
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_resetTabindices: function() {
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var selectedItem = this.multi ? (this.selectedItems && this.selectedItems[0]) : this.selectedItem;
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this.items.forEach(function(item) {
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item.setAttribute('tabindex', item === selectedItem ? '0' : '-1');
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}, this);
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},
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/**
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* Sets appropriate ARIA based on whether or not the menu is meant to be
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* multi-selectable.
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*
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* @param {boolean} multi True if the menu should be multi-selectable.
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*/
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_updateMultiselectable: function(multi) {
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if (multi) {
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this.setAttribute('aria-multiselectable', 'true');
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} else {
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this.removeAttribute('aria-multiselectable');
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}
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},
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/**
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* Given a KeyboardEvent, this method will focus the appropriate item in the
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* menu (if there is a relevant item, and it is possible to focus it).
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*
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* @param {KeyboardEvent} event A KeyboardEvent.
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*/
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_focusWithKeyboardEvent: function(event) {
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for (var i = 0, item; item = this.items[i]; i++) {
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var attr = this.attrForItemTitle || 'textContent';
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var title = item[attr] || item.getAttribute(attr);
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if (title && title.trim().charAt(0).toLowerCase() === String.fromCharCode(event.keyCode).toLowerCase()) {
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this._setFocusedItem(item);
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break;
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}
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}
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},
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/**
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* Focuses the previous item (relative to the currently focused item) in the
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* menu.
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*/
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_focusPrevious: function() {
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var length = this.items.length;
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var index = (Number(this.indexOf(this.focusedItem)) - 1 + length) % length;
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this._setFocusedItem(this.items[index]);
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},
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/**
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* Focuses the next item (relative to the currently focused item) in the
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* menu.
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*/
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_focusNext: function() {
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var index = (Number(this.indexOf(this.focusedItem)) + 1) % this.items.length;
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this._setFocusedItem(this.items[index]);
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},
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/**
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* Mutates items in the menu based on provided selection details, so that
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* all items correctly reflect selection state.
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*
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* @param {Element} item An item in the menu.
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* @param {boolean} isSelected True if the item should be shown in a
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* selected state, otherwise false.
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*/
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_applySelection: function(item, isSelected) {
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if (isSelected) {
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item.setAttribute('aria-selected', 'true');
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} else {
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item.removeAttribute('aria-selected');
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}
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Polymer.IronSelectableBehavior._applySelection.apply(this, arguments);
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},
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/**
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* Discretely updates tabindex values among menu items as the focused item
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* changes.
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*
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* @param {Element} focusedItem The element that is currently focused.
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* @param {?Element} old The last element that was considered focused, if
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* applicable.
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*/
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_focusedItemChanged: function(focusedItem, old) {
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old && old.setAttribute('tabindex', '-1');
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if (focusedItem) {
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focusedItem.setAttribute('tabindex', '0');
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focusedItem.focus();
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}
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},
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/**
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* A handler that responds to mutation changes related to the list of items
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* in the menu.
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*
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* @param {CustomEvent} event An event containing mutation records as its
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* detail.
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*/
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_onIronItemsChanged: function(event) {
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var mutations = event.detail;
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var mutation;
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var index;
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for (index = 0; index < mutations.length; ++index) {
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mutation = mutations[index];
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if (mutation.addedNodes.length) {
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this._resetTabindices();
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break;
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}
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}
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},
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/**
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* Handler that is called when a shift+tab keypress is detected by the menu.
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*
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* @param {CustomEvent} event A key combination event.
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*/
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_onShiftTabDown: function(event) {
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var oldTabIndex;
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Polymer.IronMenuBehaviorImpl._shiftTabPressed = true;
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oldTabIndex = this.getAttribute('tabindex');
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this.setAttribute('tabindex', '-1');
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this.async(function() {
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this.setAttribute('tabindex', oldTabIndex);
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Polymer.IronMenuBehaviorImpl._shiftTabPressed = false;
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// NOTE(cdata): polymer/polymer#1305
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}, 1);
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},
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/**
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* Handler that is called when the menu receives focus.
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*
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* @param {FocusEvent} event A focus event.
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*/
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_onFocus: function(event) {
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if (Polymer.IronMenuBehaviorImpl._shiftTabPressed) {
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return;
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@ -140,62 +254,48 @@ subject to an additional IP rights grant found at http://polymer.github.io/PATEN
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}, 100);
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},
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_onUpKey: function() {
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/**
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* Handler that is called when the up key is pressed.
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*
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* @param {CustomEvent} event A key combination event.
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*/
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_onUpKey: function(event) {
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// up and down arrows moves the focus
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this._focusPrevious();
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},
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_onDownKey: function() {
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/**
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* Handler that is called when the down key is pressed.
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*
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* @param {CustomEvent} event A key combination event.
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*/
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_onDownKey: function(event) {
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this._focusNext();
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},
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_onEscKey: function() {
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/**
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* Handler that is called when the esc key is pressed.
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*
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* @param {CustomEvent} event A key combination event.
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*/
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_onEscKey: function(event) {
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// esc blurs the control
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this.focusedItem.blur();
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},
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_onEnterKey: function(event) {
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// enter activates the item unless it is disabled
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this._activateFocused(event.detail.keyboardEvent);
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},
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/**
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* Handler that is called when a keydown event is detected.
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*
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* @param {KeyboardEvent} event A keyboard event.
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*/
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_onKeydown: function(event) {
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if (this.keyboardEventMatchesKeys(event, 'up down esc enter')) {
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if (this.keyboardEventMatchesKeys(event, 'up down esc')) {
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return;
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}
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// all other keys focus the menu item starting with that character
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this._focusWithKeyboardEvent(event);
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},
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_focusWithKeyboardEvent: function(event) {
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for (var i = 0, item; item = this.items[i]; i++) {
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var attr = this.attrForItemTitle || 'textContent';
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var title = item[attr] || item.getAttribute(attr);
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if (title && title.trim().charAt(0).toLowerCase() === String.fromCharCode(event.keyCode).toLowerCase()) {
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this._setFocusedItem(item);
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break;
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}
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}
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},
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_activateFocused: function(event) {
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if (!this.focusedItem.hasAttribute('disabled')) {
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this._activateHandler(event);
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}
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},
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_focusPrevious: function() {
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var length = this.items.length;
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var index = (Number(this.indexOf(this.focusedItem)) - 1 + length) % length;
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this._setFocusedItem(this.items[index]);
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},
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_focusNext: function() {
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var index = (Number(this.indexOf(this.focusedItem)) + 1) % this.items.length;
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this._setFocusedItem(this.items[index]);
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}
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};
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Polymer.IronMenuBehaviorImpl._shiftTabPressed = false;
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