schro.fi/static/foundation/js/vendor/what-input.js

/**
 * what-input - A global utility for tracking the current input method (mouse, keyboard or touch).
 * @version v5.1.2
 * @link https://github.com/ten1seven/what-input
 * @license MIT
 */
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	if(typeof exports === 'object' && typeof module === 'object')
		module.exports = factory();
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		define("whatInput", [], factory);
	else if(typeof exports === 'object')
		exports["whatInput"] = factory();
	else
		root["whatInput"] = factory();
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/* 0 */
/***/ (function(module, exports) {

	'use strict';

	module.exports = function () {
	  /*
	   * bail out if there is no document or window
	   * (i.e. in a node/non-DOM environment)
	   *
	   * Return a stubbed API instead
	   */
	  if (typeof document === 'undefined' || typeof window === 'undefined') {
	    return {
	      // always return "initial" because no interaction will ever be detected
	      ask: function ask() {
	        return 'initial';
	      },

	      // always return null
	      element: function element() {
	        return null;
	      },

	      // no-op
	      ignoreKeys: function ignoreKeys() {},

	      // no-op
	      specificKeys: function specificKeys() {},

	      // no-op
	      registerOnChange: function registerOnChange() {},

	      // no-op
	      unRegisterOnChange: function unRegisterOnChange() {}
	    };
	  }

	  /*
	   * variables
	   */

	  // cache document.documentElement
	  var docElem = document.documentElement;

	  // currently focused dom element
	  var currentElement = null;

	  // last used input type
	  var currentInput = 'initial';

	  // last used input intent
	  var currentIntent = currentInput;

	  // check for sessionStorage support
	  // then check for session variables and use if available
	  try {
	    if (window.sessionStorage.getItem('what-input')) {
	      currentInput = window.sessionStorage.getItem('what-input');
	    }

	    if (window.sessionStorage.getItem('what-intent')) {
	      currentIntent = window.sessionStorage.getItem('what-intent');
	    }
	  } catch (e) {}

	  // event buffer timer
	  var eventTimer = null;

	  // form input types
	  var formInputs = ['input', 'select', 'textarea'];

	  // empty array for holding callback functions
	  var functionList = [];

	  // list of modifier keys commonly used with the mouse and
	  // can be safely ignored to prevent false keyboard detection
	  var ignoreMap = [16, // shift
	  17, // control
	  18, // alt
	  91, // Windows key / left Apple cmd
	  93 // Windows menu / right Apple cmd
	  ];

	  var specificMap = [];

	  // mapping of events to input types
	  var inputMap = {
	    keydown: 'keyboard',
	    keyup: 'keyboard',
	    mousedown: 'mouse',
	    mousemove: 'mouse',
	    MSPointerDown: 'pointer',
	    MSPointerMove: 'pointer',
	    pointerdown: 'pointer',
	    pointermove: 'pointer',
	    touchstart: 'touch'

	    // boolean: true if touch buffer is active
	  };var isBuffering = false;

	  // boolean: true if the page is being scrolled
	  var isScrolling = false;

	  // store current mouse position
	  var mousePos = {
	    x: null,
	    y: null

	    // map of IE 10 pointer events
	  };var pointerMap = {
	    2: 'touch',
	    3: 'touch', // treat pen like touch
	    4: 'mouse'

	    // check support for passive event listeners
	  };var supportsPassive = false;

	  try {
	    var opts = Object.defineProperty({}, 'passive', {
	      get: function get() {
	        supportsPassive = true;
	      }
	    });

	    window.addEventListener('test', null, opts);
	  } catch (e) {}

	  /*
	   * set up
	   */

	  var setUp = function setUp() {
	    // add correct mouse wheel event mapping to `inputMap`
	    inputMap[detectWheel()] = 'mouse';

	    addListeners();
	    doUpdate('input');
	    doUpdate('intent');
	  };

	  /*
	   * events
	   */

	  var addListeners = function addListeners() {
	    // `pointermove`, `MSPointerMove`, `mousemove` and mouse wheel event binding
	    // can only demonstrate potential, but not actual, interaction
	    // and are treated separately
	    var options = supportsPassive ? { passive: true } : false;

	    // pointer events (mouse, pen, touch)
	    if (window.PointerEvent) {
	      window.addEventListener('pointerdown', setInput);
	      window.addEventListener('pointermove', setIntent);
	    } else if (window.MSPointerEvent) {
	      window.addEventListener('MSPointerDown', setInput);
	      window.addEventListener('MSPointerMove', setIntent);
	    } else {
	      // mouse events
	      window.addEventListener('mousedown', setInput);
	      window.addEventListener('mousemove', setIntent);

	      // touch events
	      if ('ontouchstart' in window) {
	        window.addEventListener('touchstart', eventBuffer, options);
	        window.addEventListener('touchend', setInput);
	      }
	    }

	    // mouse wheel
	    window.addEventListener(detectWheel(), setIntent, options);

	    // keyboard events
	    window.addEventListener('keydown', eventBuffer);
	    window.addEventListener('keyup', eventBuffer);

	    // focus events
	    window.addEventListener('focusin', setElement);
	    window.addEventListener('focusout', clearElement);
	  };

	  // checks conditions before updating new input
	  var setInput = function setInput(event) {
	    // only execute if the event buffer timer isn't running
	    if (!isBuffering) {
	      var eventKey = event.which;
	      var value = inputMap[event.type];

	      if (value === 'pointer') {
	        value = pointerType(event);
	      }

	      var ignoreMatch = !specificMap.length && ignoreMap.indexOf(eventKey) === -1;

	      var specificMatch = specificMap.length && specificMap.indexOf(eventKey) !== -1;

	      var shouldUpdate = value === 'keyboard' && eventKey && (ignoreMatch || specificMatch) || value === 'mouse' || value === 'touch';

	      if (currentInput !== value && shouldUpdate) {
	        currentInput = value;

	        try {
	          window.sessionStorage.setItem('what-input', currentInput);
	        } catch (e) {}

	        doUpdate('input');
	      }

	      if (currentIntent !== value && shouldUpdate) {
	        // preserve intent for keyboard typing in form fields
	        var activeElem = document.activeElement;
	        var notFormInput = activeElem && activeElem.nodeName && formInputs.indexOf(activeElem.nodeName.toLowerCase()) === -1;

	        if (notFormInput) {
	          currentIntent = value;

	          try {
	            window.sessionStorage.setItem('what-intent', currentIntent);
	          } catch (e) {}

	          doUpdate('intent');
	        }
	      }
	    }
	  };

	  // updates the doc and `inputTypes` array with new input
	  var doUpdate = function doUpdate(which) {
	    docElem.setAttribute('data-what' + which, which === 'input' ? currentInput : currentIntent);

	    fireFunctions(which);
	  };

	  // updates input intent for `mousemove` and `pointermove`
	  var setIntent = function setIntent(event) {
	    // test to see if `mousemove` happened relative to the screen to detect scrolling versus mousemove
	    detectScrolling(event);

	    // only execute if the event buffer timer isn't running
	    // or scrolling isn't happening
	    if (!isBuffering && !isScrolling) {
	      var value = inputMap[event.type];
	      if (value === 'pointer') {
	        value = pointerType(event);
	      }

	      if (currentIntent !== value) {
	        currentIntent = value;

	        try {
	          window.sessionStorage.setItem('what-intent', currentIntent);
	        } catch (e) {}

	        doUpdate('intent');
	      }
	    }
	  };

	  var setElement = function setElement(event) {
	    if (!event.target.nodeName) {
	      // If nodeName is undefined, clear the element
	      // This can happen if click inside an <svg> element.
	      clearElement();
	      return;
	    }

	    currentElement = event.target.nodeName.toLowerCase();
	    docElem.setAttribute('data-whatelement', currentElement);

	    if (event.target.classList && event.target.classList.length) {
	      docElem.setAttribute('data-whatclasses', event.target.classList.toString().replace(' ', ','));
	    }
	  };

	  var clearElement = function clearElement() {
	    currentElement = null;

	    docElem.removeAttribute('data-whatelement');
	    docElem.removeAttribute('data-whatclasses');
	  };

	  // buffers events that frequently also fire mouse events
	  var eventBuffer = function eventBuffer(event) {
	    // set the current input
	    setInput(event);

	    // clear the timer if it happens to be running
	    window.clearTimeout(eventTimer);

	    // set the isBuffering to `true`
	    isBuffering = true;

	    // run the timer
	    eventTimer = window.setTimeout(function () {
	      // if the timer runs out, set isBuffering back to `false`
	      isBuffering = false;
	    }, 100);
	  };

	  /*
	   * utilities
	   */

	  var pointerType = function pointerType(event) {
	    if (typeof event.pointerType === 'number') {
	      return pointerMap[event.pointerType];
	    } else {
	      // treat pen like touch
	      return event.pointerType === 'pen' ? 'touch' : event.pointerType;
	    }
	  };

	  // detect version of mouse wheel event to use
	  // via https://developer.mozilla.org/en-US/docs/Web/Events/wheel
	  var detectWheel = function detectWheel() {
	    var wheelType = void 0;

	    // Modern browsers support "wheel"
	    if ('onwheel' in document.createElement('div')) {
	      wheelType = 'wheel';
	    } else {
	      // Webkit and IE support at least "mousewheel"
	      // or assume that remaining browsers are older Firefox
	      wheelType = document.onmousewheel !== undefined ? 'mousewheel' : 'DOMMouseScroll';
	    }

	    return wheelType;
	  };

	  // runs callback functions
	  var fireFunctions = function fireFunctions(type) {
	    for (var i = 0, len = functionList.length; i < len; i++) {
	      if (functionList[i].type === type) {
	        functionList[i].fn.call(undefined, type === 'input' ? currentInput : currentIntent);
	      }
	    }
	  };

	  // finds matching element in an object
	  var objPos = function objPos(match) {
	    for (var i = 0, len = functionList.length; i < len; i++) {
	      if (functionList[i].fn === match) {
	        return i;
	      }
	    }
	  };

	  var detectScrolling = function detectScrolling(event) {
	    if (mousePos['x'] !== event.screenX || mousePos['y'] !== event.screenY) {
	      isScrolling = false;

	      mousePos['x'] = event.screenX;
	      mousePos['y'] = event.screenY;
	    } else {
	      isScrolling = true;
	    }
	  };

	  /*
	   * init
	   */

	  // don't start script unless browser cuts the mustard
	  // (also passes if polyfills are used)
	  if ('addEventListener' in window && Array.prototype.indexOf) {
	    setUp();
	  }

	  /*
	   * api
	   */

	  return {
	    // returns string: the current input type
	    // opt: 'intent'|'input'
	    // 'input' (default): returns the same value as the `data-whatinput` attribute
	    // 'intent': includes `data-whatintent` value if it's different than `data-whatinput`
	    ask: function ask(opt) {
	      return opt === 'intent' ? currentIntent : currentInput;
	    },

	    // returns string: the currently focused element or null
	    element: function element() {
	      return currentElement;
	    },

	    // overwrites ignored keys with provided array
	    ignoreKeys: function ignoreKeys(arr) {
	      ignoreMap = arr;
	    },

	    // overwrites specific char keys to update on
	    specificKeys: function specificKeys(arr) {
	      specificMap = arr;
	    },

	    // attach functions to input and intent "events"
	    // funct: function to fire on change
	    // eventType: 'input'|'intent'
	    registerOnChange: function registerOnChange(fn, eventType) {
	      functionList.push({
	        fn: fn,
	        type: eventType || 'input'
	      });
	    },

	    unRegisterOnChange: function unRegisterOnChange(fn) {
	      var position = objPos(fn);

	      if (position || position === 0) {
	        functionList.splice(position, 1);
	      }
	    }
	  };
	}();

/***/ })
/******/ ])
});
;