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dashboard-ui/thirdparty/iron-behaviors/iron-button-state.html

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+<!--
+@license
+Copyright (c) 2015 The Polymer Project Authors. All rights reserved.
+This code may only be used under the BSD style license found at http://polymer.github.io/LICENSE.txt
+The complete set of authors may be found at http://polymer.github.io/AUTHORS.txt
+The complete set of contributors may be found at http://polymer.github.io/CONTRIBUTORS.txt
+Code distributed by Google as part of the polymer project is also
+subject to an additional IP rights grant found at http://polymer.github.io/PATENTS.txt
+-->
+
+<link rel="import" href="../polymer/polymer.html">
+<link rel="import" href="../iron-a11y-keys-behavior/iron-a11y-keys-behavior.html">
+<link rel="import" href="iron-control-state.html">
+
+<script>
+
+  /**
+   * @demo demo/index.html
+   * @polymerBehavior
+   */
+  Polymer.IronButtonStateImpl = {
+
+    properties: {
+
+      /**
+       * If true, the user is currently holding down the button.
+       */
+      pressed: {
+        type: Boolean,
+        readOnly: true,
+        value: false,
+        reflectToAttribute: true,
+        observer: '_pressedChanged'
+      },
+
+      /**
+       * If true, the button toggles the active state with each tap or press
+       * of the spacebar.
+       */
+      toggles: {
+        type: Boolean,
+        value: false,
+        reflectToAttribute: true
+      },
+
+      /**
+       * If true, the button is a toggle and is currently in the active state.
+       */
+      active: {
+        type: Boolean,
+        value: false,
+        notify: true,
+        reflectToAttribute: true,
+        observer: '_activeChanged'
+      },
+
+      /**
+       * True if the element is currently being pressed by a "pointer," which
+       * is loosely defined as mouse or touch input (but specifically excluding
+       * keyboard input).
+       */
+      pointerDown: {
+        type: Boolean,
+        readOnly: true,
+        value: false
+      },
+
+      /**
+       * True if the input device that caused the element to receive focus
+       * was a keyboard.
+       */
+      receivedFocusFromKeyboard: {
+        type: Boolean,
+        readOnly: true
+      }
+    },
+
+    listeners: {
+      down: '_downHandler',
+      up: '_upHandler',
+      tap: '_tapHandler'
+    },
+
+    observers: [
+      '_detectKeyboardFocus(focused)'
+    ],
+
+    keyBindings: {
+      'enter:keydown': '_asyncClick',
+      'space:keydown': '_spaceKeyDownHandler',
+      'space:keyup': '_spaceKeyUpHandler',
+    },
+
+    _tapHandler: function() {
+      if (this.toggles) {
+       // a tap is needed to toggle the active state
+        this._userActivate(!this.active);
+      } else {
+        this.active = false;
+      }
+    },
+
+    _detectKeyboardFocus: function(focused) {
+      this._setReceivedFocusFromKeyboard(!this.pointerDown && focused);
+    },
+
+    // to emulate native checkbox, (de-)activations from a user interaction fire
+    // 'change' events
+    _userActivate: function(active) {
+      this.active = active;
+      this.fire('change');
+    },
+
+    _downHandler: function() {
+      this._setPointerDown(true);
+      this._setPressed(true);
+      this._setReceivedFocusFromKeyboard(false);
+    },
+
+    _upHandler: function() {
+      this._setPointerDown(false);
+      this._setPressed(false);
+    },
+
+    _spaceKeyDownHandler: function(event) {
+      var keyboardEvent = event.detail.keyboardEvent;
+      keyboardEvent.preventDefault();
+      keyboardEvent.stopImmediatePropagation();
+      this._setPressed(true);
+    },
+
+    _spaceKeyUpHandler: function() {
+      if (this.pressed) {
+        this._asyncClick();
+      }
+      this._setPressed(false);
+    },
+
+    // trigger click asynchronously, the asynchrony is useful to allow one
+    // event handler to unwind before triggering another event
+    _asyncClick: function() {
+      this.async(function() {
+        this.click();
+      }, 1);
+    },
+
+    // any of these changes are considered a change to button state
+
+    _pressedChanged: function(pressed) {
+      this._changedButtonState();
+    },
+
+    _activeChanged: function(active) {
+      if (this.toggles) {
+        this.setAttribute('aria-pressed', active ? 'true' : 'false');
+      } else {
+        this.removeAttribute('aria-pressed');
+      }
+      this._changedButtonState();
+    },
+
+    _controlStateChanged: function() {
+      if (this.disabled) {
+        this._setPressed(false);
+      } else {
+        this._changedButtonState();
+      }
+    },
+
+    // provide hook for follow-on behaviors to react to button-state
+
+    _changedButtonState: function() {
+      if (this._buttonStateChanged) {
+        this._buttonStateChanged(); // abstract
+      }
+    }
+
+  };
+
+  /** @polymerBehavior Polymer.IronButtonState */
+  Polymer.IronButtonState = [
+    Polymer.IronA11yKeysBehavior,
+    Polymer.IronButtonStateImpl
+  ];
+
+</script>

dashboard-ui/thirdparty/iron-behaviors/iron-control-state.html

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+<!--
+@license
+Copyright (c) 2015 The Polymer Project Authors. All rights reserved.
+This code may only be used under the BSD style license found at http://polymer.github.io/LICENSE.txt
+The complete set of authors may be found at http://polymer.github.io/AUTHORS.txt
+The complete set of contributors may be found at http://polymer.github.io/CONTRIBUTORS.txt
+Code distributed by Google as part of the polymer project is also
+subject to an additional IP rights grant found at http://polymer.github.io/PATENTS.txt
+-->
+
+<link rel="import" href="../polymer/polymer.html">
+
+<script>
+
+  /**
+   * @demo demo/index.html
+   * @polymerBehavior
+   */
+  Polymer.IronControlState = {
+
+    properties: {
+
+      /**
+       * If true, the element currently has focus.
+       */
+      focused: {
+        type: Boolean,
+        value: false,
+        notify: true,
+        readOnly: true,
+        reflectToAttribute: true
+      },
+
+      /**
+       * If true, the user cannot interact with this element.
+       */
+      disabled: {
+        type: Boolean,
+        value: false,
+        notify: true,
+        observer: '_disabledChanged',
+        reflectToAttribute: true
+      },
+
+      _oldTabIndex: {
+        type: Number
+      },
+
+      _boundFocusBlurHandler: {
+        type: Function,
+        value: function() {
+          return this._focusBlurHandler.bind(this);
+        }
+      }
+
+    },
+
+    observers: [
+      '_changedControlState(focused, disabled)'
+    ],
+
+    ready: function() {
+      // TODO(sjmiles): ensure read-only property is valued so the compound
+      // observer will fire
+      if (this.focused === undefined) {
+        this._setFocused(false);
+      }
+      this.addEventListener('focus', this._boundFocusBlurHandler, true);
+      this.addEventListener('blur', this._boundFocusBlurHandler, true);
+    },
+
+    _focusBlurHandler: function(event) {
+      var target = event.path ? event.path[0] : event.target;
+      if (target === this) {
+        var focused = event.type === 'focus';
+        this._setFocused(focused);
+      } else if (!this.shadowRoot) {
+        event.stopPropagation();
+        this.fire(event.type, {sourceEvent: event}, {
+          node: this,
+          bubbles: event.bubbles,
+          cancelable: event.cancelable
+        });
+      }
+    },
+
+    _disabledChanged: function(disabled, old) {
+      this.setAttribute('aria-disabled', disabled ? 'true' : 'false');
+      this.style.pointerEvents = disabled ? 'none' : '';
+      if (disabled) {
+        this._oldTabIndex = this.tabIndex;
+        this.focused = false;
+        this.tabIndex = -1;
+      } else if (this._oldTabIndex !== undefined) {
+        this.tabIndex = this._oldTabIndex;
+      }
+    },
+
+    _changedControlState: function() {
+      // _controlStateChanged is abstract, follow-on behaviors may implement it
+      if (this._controlStateChanged) {
+        this._controlStateChanged();
+      }
+    }
+
+  };
+
+</script>