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jrtechs-sugarizer-lite/activities/Memorize.activity/lib/interact.js

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/**
* interact.js v1.2.4
*
* Copyright (c) 2012-2015 Taye Adeyemi <dev@taye.me>
* Open source under the MIT License.
* https://raw.github.com/taye/interact.js/master/LICENSE
*/
(function (realWindow) {
'use strict';
var // get wrapped window if using Shadow DOM polyfill
window = (function () {
// create a TextNode
var el = realWindow.document.createTextNode('');
// check if it's wrapped by a polyfill
if (el.ownerDocument !== realWindow.document
&& typeof realWindow.wrap === 'function'
&& realWindow.wrap(el) === el) {
// return wrapped window
return realWindow.wrap(realWindow);
}
// no Shadow DOM polyfil or native implementation
return realWindow;
}()),
document = window.document,
DocumentFragment = window.DocumentFragment || blank,
SVGElement = window.SVGElement || blank,
SVGSVGElement = window.SVGSVGElement || blank,
SVGElementInstance = window.SVGElementInstance || blank,
HTMLElement = window.HTMLElement || window.Element,
PointerEvent = (window.PointerEvent || window.MSPointerEvent),
pEventTypes,
hypot = Math.hypot || function (x, y) { return Math.sqrt(x * x + y * y); },
tmpXY = {}, // reduce object creation in getXY()
documents = [], // all documents being listened to
interactables = [], // all set interactables
interactions = [], // all interactions
dynamicDrop = false,
// {
// type: {
// selectors: ['selector', ...],
// contexts : [document, ...],
// listeners: [[listener, useCapture], ...]
// }
// }
delegatedEvents = {},
defaultOptions = {
base: {
accept : null,
actionChecker : null,
styleCursor : true,
preventDefault: 'auto',
origin : { x: 0, y: 0 },
deltaSource : 'page',
allowFrom : null,
ignoreFrom : null,
_context : document,
dropChecker : null
},
drag: {
enabled: false,
manualStart: true,
max: Infinity,
maxPerElement: 1,
snap: null,
restrict: null,
inertia: null,
autoScroll: null,
axis: 'xy',
},
drop: {
enabled: false,
accept: null,
overlap: 'pointer'
},
resize: {
enabled: false,
manualStart: false,
max: Infinity,
maxPerElement: 1,
snap: null,
restrict: null,
inertia: null,
autoScroll: null,
square: false,
axis: 'xy',
// object with props left, right, top, bottom which are
// true/false values to resize when the pointer is over that edge,
// CSS selectors to match the handles for each direction
// or the Elements for each handle
edges: null,
// a value of 'none' will limit the resize rect to a minimum of 0x0
// 'negate' will alow the rect to have negative width/height
// 'reposition' will keep the width/height positive by swapping
// the top and bottom edges and/or swapping the left and right edges
invert: 'none'
},
gesture: {
manualStart: false,
enabled: false,
max: Infinity,
maxPerElement: 1,
restrict: null
},
perAction: {
manualStart: false,
max: Infinity,
maxPerElement: 1,
snap: {
enabled : false,
endOnly : false,
range : Infinity,
targets : null,
offsets : null,
relativePoints: null
},
restrict: {
enabled: false,
endOnly: false
},
autoScroll: {
enabled : false,
container : null, // the item that is scrolled (Window or HTMLElement)
margin : 60,
speed : 300 // the scroll speed in pixels per second
},
inertia: {
enabled : false,
resistance : 10, // the lambda in exponential decay
minSpeed : 100, // target speed must be above this for inertia to start
endSpeed : 10, // the speed at which inertia is slow enough to stop
allowResume : true, // allow resuming an action in inertia phase
zeroResumeDelta : true, // if an action is resumed after launch, set dx/dy to 0
smoothEndDuration: 300 // animate to snap/restrict endOnly if there's no inertia
}
},
_holdDuration: 600
},
// Things related to autoScroll
autoScroll = {
interaction: null,
i: null, // the handle returned by window.setInterval
x: 0, y: 0, // Direction each pulse is to scroll in
// scroll the window by the values in scroll.x/y
scroll: function () {
var options = autoScroll.interaction.target.options[autoScroll.interaction.prepared.name].autoScroll,
container = options.container || getWindow(autoScroll.interaction.element),
now = new Date().getTime(),
// change in time in seconds
dt = (now - autoScroll.prevTime) / 1000,
// displacement
s = options.speed * dt;
if (s >= 1) {
if (isWindow(container)) {
container.scrollBy(autoScroll.x * s, autoScroll.y * s);
}
else if (container) {
container.scrollLeft += autoScroll.x * s;
container.scrollTop += autoScroll.y * s;
}
autoScroll.prevTime = now;
}
if (autoScroll.isScrolling) {
cancelFrame(autoScroll.i);
autoScroll.i = reqFrame(autoScroll.scroll);
}
},
edgeMove: function (event) {
var interaction,
target,
doAutoscroll = false;
for (var i = 0; i < interactions.length; i++) {
interaction = interactions[i];
if (interaction.interacting()
&& checkAutoScroll(interaction.target, interaction.prepared.name)) {
target = interaction.target;
doAutoscroll = true;
break;
}
}
if (!doAutoscroll) { return; }
var top,
right,
bottom,
left,
options = target.options[interaction.prepared.name].autoScroll,
container = options.container || getWindow(interaction.element);
if (isWindow(container)) {
left = event.clientX < autoScroll.margin;
top = event.clientY < autoScroll.margin;
right = event.clientX > container.innerWidth - autoScroll.margin;
bottom = event.clientY > container.innerHeight - autoScroll.margin;
}
else {
var rect = getElementRect(container);
left = event.clientX < rect.left + autoScroll.margin;
top = event.clientY < rect.top + autoScroll.margin;
right = event.clientX > rect.right - autoScroll.margin;
bottom = event.clientY > rect.bottom - autoScroll.margin;
}
autoScroll.x = (right ? 1: left? -1: 0);
autoScroll.y = (bottom? 1: top? -1: 0);
if (!autoScroll.isScrolling) {
// set the autoScroll properties to those of the target
autoScroll.margin = options.margin;
autoScroll.speed = options.speed;
autoScroll.start(interaction);
}
},
isScrolling: false,
prevTime: 0,
start: function (interaction) {
autoScroll.isScrolling = true;
cancelFrame(autoScroll.i);
autoScroll.interaction = interaction;
autoScroll.prevTime = new Date().getTime();
autoScroll.i = reqFrame(autoScroll.scroll);
},
stop: function () {
autoScroll.isScrolling = false;
cancelFrame(autoScroll.i);
}
},
// Does the browser support touch input?
supportsTouch = (('ontouchstart' in window) || window.DocumentTouch && document instanceof window.DocumentTouch),
// Does the browser support PointerEvents
supportsPointerEvent = !!PointerEvent,
// Less Precision with touch input
margin = supportsTouch || supportsPointerEvent? 20: 10,
pointerMoveTolerance = 1,
// for ignoring browser's simulated mouse events
prevTouchTime = 0,
// Allow this many interactions to happen simultaneously
maxInteractions = Infinity,
// Check if is IE9 or older
actionCursors = (document.all && !window.atob) ? {
drag : 'move',
resizex : 'e-resize',
resizey : 's-resize',
resizexy: 'se-resize',
resizetop : 'n-resize',
resizeleft : 'w-resize',
resizebottom : 's-resize',
resizeright : 'e-resize',
resizetopleft : 'se-resize',
resizebottomright: 'se-resize',
resizetopright : 'ne-resize',
resizebottomleft : 'ne-resize',
gesture : ''
} : {
drag : 'move',
resizex : 'ew-resize',
resizey : 'ns-resize',
resizexy: 'nwse-resize',
resizetop : 'ns-resize',
resizeleft : 'ew-resize',
resizebottom : 'ns-resize',
resizeright : 'ew-resize',
resizetopleft : 'nwse-resize',
resizebottomright: 'nwse-resize',
resizetopright : 'nesw-resize',
resizebottomleft : 'nesw-resize',
gesture : ''
},
actionIsEnabled = {
drag : true,
resize : true,
gesture: true
},
// because Webkit and Opera still use 'mousewheel' event type
wheelEvent = 'onmousewheel' in document? 'mousewheel': 'wheel',
eventTypes = [
'dragstart',
'dragmove',
'draginertiastart',
'dragend',
'dragenter',
'dragleave',
'dropactivate',
'dropdeactivate',
'dropmove',
'drop',
'resizestart',
'resizemove',
'resizeinertiastart',
'resizeend',
'gesturestart',
'gesturemove',
'gestureinertiastart',
'gestureend',
'down',
'move',
'up',
'cancel',
'tap',
'doubletap',
'hold'
],
globalEvents = {},
// Opera Mobile must be handled differently
isOperaMobile = navigator.appName == 'Opera' &&
supportsTouch &&
navigator.userAgent.match('Presto'),
// scrolling doesn't change the result of
// getBoundingClientRect/getClientRects on iOS <=7 but it does on iOS 8
isIOS7orLower = (/iP(hone|od|ad)/.test(navigator.platform)
&& /OS [1-7][^\d]/.test(navigator.appVersion)),
// prefix matchesSelector
prefixedMatchesSelector = 'matches' in Element.prototype?
'matches': 'webkitMatchesSelector' in Element.prototype?
'webkitMatchesSelector': 'mozMatchesSelector' in Element.prototype?
'mozMatchesSelector': 'oMatchesSelector' in Element.prototype?
'oMatchesSelector': 'msMatchesSelector',
// will be polyfill function if browser is IE8
ie8MatchesSelector,
// native requestAnimationFrame or polyfill
reqFrame = realWindow.requestAnimationFrame,
cancelFrame = realWindow.cancelAnimationFrame,
// Events wrapper
events = (function () {
var useAttachEvent = ('attachEvent' in window) && !('addEventListener' in window),
addEvent = useAttachEvent? 'attachEvent': 'addEventListener',
removeEvent = useAttachEvent? 'detachEvent': 'removeEventListener',
on = useAttachEvent? 'on': '',
elements = [],
targets = [],
attachedListeners = [];
function add (element, type, listener, useCapture) {
var elementIndex = indexOf(elements, element),
target = targets[elementIndex];
if (!target) {
target = {
events: {},
typeCount: 0
};
elementIndex = elements.push(element) - 1;
targets.push(target);
attachedListeners.push((useAttachEvent ? {
supplied: [],
wrapped : [],
useCount: []
} : null));
}
if (!target.events[type]) {
target.events[type] = [];
target.typeCount++;
}
if (!contains(target.events[type], listener)) {
var ret;
if (useAttachEvent) {
var listeners = attachedListeners[elementIndex],
listenerIndex = indexOf(listeners.supplied, listener);
var wrapped = listeners.wrapped[listenerIndex] || function (event) {
if (!event.immediatePropagationStopped) {
event.target = event.srcElement;
event.currentTarget = element;
event.preventDefault = event.preventDefault || preventDef;
event.stopPropagation = event.stopPropagation || stopProp;
event.stopImmediatePropagation = event.stopImmediatePropagation || stopImmProp;
if (/mouse|click/.test(event.type)) {
event.pageX = event.clientX + getWindow(element).document.documentElement.scrollLeft;
event.pageY = event.clientY + getWindow(element).document.documentElement.scrollTop;
}
listener(event);
}
};
ret = element[addEvent](on + type, wrapped, Boolean(useCapture));
if (listenerIndex === -1) {
listeners.supplied.push(listener);
listeners.wrapped.push(wrapped);
listeners.useCount.push(1);
}
else {
listeners.useCount[listenerIndex]++;
}
}
else {
ret = element[addEvent](type, listener, useCapture || false);
}
target.events[type].push(listener);
return ret;
}
}
function remove (element, type, listener, useCapture) {
var i,
elementIndex = indexOf(elements, element),
target = targets[elementIndex],
listeners,
listenerIndex,
wrapped = listener;
if (!target || !target.events) {
return;
}
if (useAttachEvent) {
listeners = attachedListeners[elementIndex];
listenerIndex = indexOf(listeners.supplied, listener);
wrapped = listeners.wrapped[listenerIndex];
}
if (type === 'all') {
for (type in target.events) {
if (target.events.hasOwnProperty(type)) {
remove(element, type, 'all');
}
}
return;
}
if (target.events[type]) {
var len = target.events[type].length;
if (listener === 'all') {
for (i = 0; i < len; i++) {
remove(element, type, target.events[type][i], Boolean(useCapture));
}
} else {
for (i = 0; i < len; i++) {
if (target.events[type][i] === listener) {
element[removeEvent](on + type, wrapped, useCapture || false);
target.events[type].splice(i, 1);
if (useAttachEvent && listeners) {
listeners.useCount[listenerIndex]--;
if (listeners.useCount[listenerIndex] === 0) {
listeners.supplied.splice(listenerIndex, 1);
listeners.wrapped.splice(listenerIndex, 1);
listeners.useCount.splice(listenerIndex, 1);
}
}
break;
}
}
}
if (target.events[type] && target.events[type].length === 0) {
target.events[type] = null;
target.typeCount--;
}
}
if (!target.typeCount) {
targets.splice(elementIndex);
elements.splice(elementIndex);
attachedListeners.splice(elementIndex);
}
}
function preventDef () {
this.returnValue = false;
}
function stopProp () {
this.cancelBubble = true;
}
function stopImmProp () {
this.cancelBubble = true;
this.immediatePropagationStopped = true;
}
return {
add: add,
remove: remove,
useAttachEvent: useAttachEvent,
_elements: elements,
_targets: targets,
_attachedListeners: attachedListeners
};
}());
function blank () {}
function isElement (o) {
if (!o || (typeof o !== 'object')) { return false; }
var _window = getWindow(o) || window;
return (/object|function/.test(typeof _window.Element)
? o instanceof _window.Element //DOM2
: o.nodeType === 1 && typeof o.nodeName === "string");
}
function isWindow (thing) { return !!(thing && thing.Window) && (thing instanceof thing.Window); }
function isDocFrag (thing) { return !!thing && thing instanceof DocumentFragment; }
function isArray (thing) {
return isObject(thing)
&& (typeof thing.length !== undefined)
&& isFunction(thing.splice);
}
function isObject (thing) { return !!thing && (typeof thing === 'object'); }
function isFunction (thing) { return typeof thing === 'function'; }
function isNumber (thing) { return typeof thing === 'number' ; }
function isBool (thing) { return typeof thing === 'boolean' ; }
function isString (thing) { return typeof thing === 'string' ; }
function trySelector (value) {
if (!isString(value)) { return false; }
// an exception will be raised if it is invalid
document.querySelector(value);
return true;
}
function extend (dest, source) {
for (var prop in source) {
dest[prop] = source[prop];
}
return dest;
}
function copyCoords (dest, src) {
dest.page = dest.page || {};
dest.page.x = src.page.x;
dest.page.y = src.page.y;
dest.client = dest.client || {};
dest.client.x = src.client.x;
dest.client.y = src.client.y;
dest.timeStamp = src.timeStamp;
}
function setEventXY (targetObj, pointer, interaction) {
if (!pointer) {
if (interaction.pointerIds.length > 1) {
pointer = touchAverage(interaction.pointers);
}
else {
pointer = interaction.pointers[0];
}
}
getPageXY(pointer, tmpXY, interaction);
targetObj.page.x = tmpXY.x;
targetObj.page.y = tmpXY.y;
getClientXY(pointer, tmpXY, interaction);
targetObj.client.x = tmpXY.x;
targetObj.client.y = tmpXY.y;
targetObj.timeStamp = new Date().getTime();
}
function setEventDeltas (targetObj, prev, cur) {
targetObj.page.x = cur.page.x - prev.page.x;
targetObj.page.y = cur.page.y - prev.page.y;
targetObj.client.x = cur.client.x - prev.client.x;
targetObj.client.y = cur.client.y - prev.client.y;
targetObj.timeStamp = new Date().getTime() - prev.timeStamp;
// set pointer velocity
var dt = Math.max(targetObj.timeStamp / 1000, 0.001);
targetObj.page.speed = hypot(targetObj.page.x, targetObj.page.y) / dt;
targetObj.page.vx = targetObj.page.x / dt;
targetObj.page.vy = targetObj.page.y / dt;
targetObj.client.speed = hypot(targetObj.client.x, targetObj.page.y) / dt;
targetObj.client.vx = targetObj.client.x / dt;
targetObj.client.vy = targetObj.client.y / dt;
}
// Get specified X/Y coords for mouse or event.touches[0]
function getXY (type, pointer, xy) {
xy = xy || {};
type = type || 'page';
xy.x = pointer[type + 'X'];
xy.y = pointer[type + 'Y'];
return xy;
}
function getPageXY (pointer, page, interaction) {
page = page || {};
if (pointer instanceof InteractEvent) {
if (/inertiastart/.test(pointer.type)) {
interaction = interaction || pointer.interaction;
extend(page, interaction.inertiaStatus.upCoords.page);
page.x += interaction.inertiaStatus.sx;
page.y += interaction.inertiaStatus.sy;
}
else {
page.x = pointer.pageX;
page.y = pointer.pageY;
}
}
// Opera Mobile handles the viewport and scrolling oddly
else if (isOperaMobile) {
getXY('screen', pointer, page);
page.x += window.scrollX;
page.y += window.scrollY;
}
else {
getXY('page', pointer, page);
}
return page;
}
function getClientXY (pointer, client, interaction) {
client = client || {};
if (pointer instanceof InteractEvent) {
if (/inertiastart/.test(pointer.type)) {
extend(client, interaction.inertiaStatus.upCoords.client);
client.x += interaction.inertiaStatus.sx;
client.y += interaction.inertiaStatus.sy;
}
else {
client.x = pointer.clientX;
client.y = pointer.clientY;
}
}
else {
// Opera Mobile handles the viewport and scrolling oddly
getXY(isOperaMobile? 'screen': 'client', pointer, client);
}
return client;
}
function getScrollXY (win) {
win = win || window;
return {
x: win.scrollX || win.document.documentElement.scrollLeft,
y: win.scrollY || win.document.documentElement.scrollTop
};
}
function getPointerId (pointer) {
return isNumber(pointer.pointerId)? pointer.pointerId : pointer.identifier;
}
function getActualElement (element) {
return (element instanceof SVGElementInstance
? element.correspondingUseElement
: element);
}
function getWindow (node) {
if (isWindow(node)) {
return node;
}
var rootNode = (node.ownerDocument || node);
return rootNode.defaultView || rootNode.parentWindow || window;
}
function getElementRect (element) {
var scroll = isIOS7orLower
? { x: 0, y: 0 }
: getScrollXY(getWindow(element)),
clientRect = (element instanceof SVGElement)?
element.getBoundingClientRect():
element.getClientRects()[0];
return clientRect && {
left : clientRect.left + scroll.x,
right : clientRect.right + scroll.x,
top : clientRect.top + scroll.y,
bottom: clientRect.bottom + scroll.y,
width : clientRect.width || clientRect.right - clientRect.left,
height: clientRect.heigh || clientRect.bottom - clientRect.top
};
}
function getTouchPair (event) {
var touches = [];
// array of touches is supplied
if (isArray(event)) {
touches[0] = event[0];
touches[1] = event[1];
}
// an event
else {
if (event.type === 'touchend') {
if (event.touches.length === 1) {
touches[0] = event.touches[0];
touches[1] = event.changedTouches[0];
}
else if (event.touches.length === 0) {
touches[0] = event.changedTouches[0];
touches[1] = event.changedTouches[1];
}
}
else {
touches[0] = event.touches[0];
touches[1] = event.touches[1];
}
}
return touches;
}
function touchAverage (event) {
var touches = getTouchPair(event);
return {
pageX: (touches[0].pageX + touches[1].pageX) / 2,
pageY: (touches[0].pageY + touches[1].pageY) / 2,
clientX: (touches[0].clientX + touches[1].clientX) / 2,
clientY: (touches[0].clientY + touches[1].clientY) / 2
};
}
function touchBBox (event) {
if (!event.length && !(event.touches && event.touches.length > 1)) {
return;
}
var touches = getTouchPair(event),
minX = Math.min(touches[0].pageX, touches[1].pageX),
minY = Math.min(touches[0].pageY, touches[1].pageY),
maxX = Math.max(touches[0].pageX, touches[1].pageX),
maxY = Math.max(touches[0].pageY, touches[1].pageY);
return {
x: minX,
y: minY,
left: minX,
top: minY,
width: maxX - minX,
height: maxY - minY
};
}
function touchDistance (event, deltaSource) {
deltaSource = deltaSource || defaultOptions.deltaSource;
var sourceX = deltaSource + 'X',
sourceY = deltaSource + 'Y',
touches = getTouchPair(event);
var dx = touches[0][sourceX] - touches[1][sourceX],
dy = touches[0][sourceY] - touches[1][sourceY];
return hypot(dx, dy);
}
function touchAngle (event, prevAngle, deltaSource) {
deltaSource = deltaSource || defaultOptions.deltaSource;
var sourceX = deltaSource + 'X',
sourceY = deltaSource + 'Y',
touches = getTouchPair(event),
dx = touches[0][sourceX] - touches[1][sourceX],
dy = touches[0][sourceY] - touches[1][sourceY],
angle = 180 * Math.atan(dy / dx) / Math.PI;
if (isNumber(prevAngle)) {
var dr = angle - prevAngle,
drClamped = dr % 360;
if (drClamped > 315) {
angle -= 360 + (angle / 360)|0 * 360;
}
else if (drClamped > 135) {
angle -= 180 + (angle / 360)|0 * 360;
}
else if (drClamped < -315) {
angle += 360 + (angle / 360)|0 * 360;
}
else if (drClamped < -135) {
angle += 180 + (angle / 360)|0 * 360;
}
}
return angle;
}
function getOriginXY (interactable, element) {
var origin = interactable
? interactable.options.origin
: defaultOptions.origin;
if (origin === 'parent') {
origin = parentElement(element);
}
else if (origin === 'self') {
origin = interactable.getRect(element);
}
else if (trySelector(origin)) {
origin = closest(element, origin) || { x: 0, y: 0 };
}
if (isFunction(origin)) {
origin = origin(interactable && element);
}
if (isElement(origin)) {
origin = getElementRect(origin);
}
origin.x = ('x' in origin)? origin.x : origin.left;
origin.y = ('y' in origin)? origin.y : origin.top;
return origin;
}
// http://stackoverflow.com/a/5634528/2280888
function _getQBezierValue(t, p1, p2, p3) {
var iT = 1 - t;
return iT * iT * p1 + 2 * iT * t * p2 + t * t * p3;
}
function getQuadraticCurvePoint(startX, startY, cpX, cpY, endX, endY, position) {
return {
x: _getQBezierValue(position, startX, cpX, endX),
y: _getQBezierValue(position, startY, cpY, endY)
};
}
// http://gizma.com/easing/
function easeOutQuad (t, b, c, d) {
t /= d;
return -c * t*(t-2) + b;
}
function nodeContains (parent, child) {
while (child) {
if (child === parent) {
return true;
}
child = child.parentNode;
}
return false;
}
function closest (child, selector) {
var parent = parentElement(child);
while (isElement(parent)) {
if (matchesSelector(parent, selector)) { return parent; }
parent = parentElement(parent);
}
return null;
}
function parentElement (node) {
var parent = node.parentNode;
if (isDocFrag(parent)) {
// skip past #shado-root fragments
while ((parent = parent.host) && isDocFrag(parent)) {}
return parent;
}
return parent;
}
function inContext (interactable, element) {
return interactable._context === element.ownerDocument
|| nodeContains(interactable._context, element);
}
function testIgnore (interactable, interactableElement, element) {
var ignoreFrom = interactable.options.ignoreFrom;
if (!ignoreFrom || !isElement(element)) { return false; }
if (isString(ignoreFrom)) {
return matchesUpTo(element, ignoreFrom, interactableElement);
}
else if (isElement(ignoreFrom)) {
return nodeContains(ignoreFrom, element);
}
return false;
}
function testAllow (interactable, interactableElement, element) {
var allowFrom = interactable.options.allowFrom;
if (!allowFrom) { return true; }
if (!isElement(element)) { return false; }
if (isString(allowFrom)) {
return matchesUpTo(element, allowFrom, interactableElement);
}
else if (isElement(allowFrom)) {
return nodeContains(allowFrom, element);
}
return false;
}
function checkAxis (axis, interactable) {
if (!interactable) { return false; }
var thisAxis = interactable.options.drag.axis;
return (axis === 'xy' || thisAxis === 'xy' || thisAxis === axis);
}
function checkSnap (interactable, action) {
var options = interactable.options;
if (/^resize/.test(action)) {
action = 'resize';
}
return options[action].snap && options[action].snap.enabled;
}
function checkRestrict (interactable, action) {
var options = interactable.options;
if (/^resize/.test(action)) {
action = 'resize';
}
return options[action].restrict && options[action].restrict.enabled;
}
function checkAutoScroll (interactable, action) {
var options = interactable.options;
if (/^resize/.test(action)) {
action = 'resize';
}
return options[action].autoScroll && options[action].autoScroll.enabled;
}
function withinInteractionLimit (interactable, element, action) {
var options = interactable.options,
maxActions = options[action.name].max,
maxPerElement = options[action.name].maxPerElement,
activeInteractions = 0,
targetCount = 0,
targetElementCount = 0;
for (var i = 0, len = interactions.length; i < len; i++) {
var interaction = interactions[i],
otherAction = interaction.prepared.name,
active = interaction.interacting();
if (!active) { continue; }
activeInteractions++;
if (activeInteractions >= maxInteractions) {
return false;
}
if (interaction.target !== interactable) { continue; }
targetCount += (otherAction === action.name)|0;
if (targetCount >= maxActions) {
return false;
}
if (interaction.element === element) {
targetElementCount++;
if (otherAction !== action.name || targetElementCount >= maxPerElement) {
return false;
}
}
}
return maxInteractions > 0;
}
// Test for the element that's "above" all other qualifiers
function indexOfDeepestElement (elements) {
var dropzone,
deepestZone = elements[0],
index = deepestZone? 0: -1,
parent,
deepestZoneParents = [],
dropzoneParents = [],
child,
i,
n;
for (i = 1; i < elements.length; i++) {
dropzone = elements[i];
// an element might belong to multiple selector dropzones
if (!dropzone || dropzone === deepestZone) {
continue;
}
if (!deepestZone) {
deepestZone = dropzone;
index = i;
continue;
}
// check if the deepest or current are document.documentElement or document.rootElement
// - if the current dropzone is, do nothing and continue
if (dropzone.parentNode === dropzone.ownerDocument) {
continue;
}
// - if deepest is, update with the current dropzone and continue to next
else if (deepestZone.parentNode === dropzone.ownerDocument) {
deepestZone = dropzone;
index = i;
continue;
}
if (!deepestZoneParents.length) {
parent = deepestZone;
while (parent.parentNode && parent.parentNode !== parent.ownerDocument) {
deepestZoneParents.unshift(parent);
parent = parent.parentNode;
}
}
// if this element is an svg element and the current deepest is
// an HTMLElement
if (deepestZone instanceof HTMLElement
&& dropzone instanceof SVGElement
&& !(dropzone instanceof SVGSVGElement)) {
if (dropzone === deepestZone.parentNode) {
continue;
}
parent = dropzone.ownerSVGElement;
}
else {
parent = dropzone;
}
dropzoneParents = [];
while (parent.parentNode !== parent.ownerDocument) {
dropzoneParents.unshift(parent);
parent = parent.parentNode;
}
n = 0;
// get (position of last common ancestor) + 1
while (dropzoneParents[n] && dropzoneParents[n] === deepestZoneParents[n]) {
n++;
}
var parents = [
dropzoneParents[n - 1],
dropzoneParents[n],
deepestZoneParents[n]
];
child = parents[0].lastChild;
while (child) {
if (child === parents[1]) {
deepestZone = dropzone;
index = i;
deepestZoneParents = [];
break;
}
else if (child === parents[2]) {
break;
}
child = child.previousSibling;
}
}
return index;
}
function Interaction () {
this.target = null; // current interactable being interacted with
this.element = null; // the target element of the interactable
this.dropTarget = null; // the dropzone a drag target might be dropped into
this.dropElement = null; // the element at the time of checking
this.prevDropTarget = null; // the dropzone that was recently dragged away from
this.prevDropElement = null; // the element at the time of checking
this.prepared = { // action that's ready to be fired on next move event
name : null,
axis : null,
edges: null
};
this.matches = []; // all selectors that are matched by target element
this.matchElements = []; // corresponding elements
this.inertiaStatus = {
active : false,
smoothEnd : false,
startEvent: null,
upCoords: {},
xe: 0, ye: 0,
sx: 0, sy: 0,
t0: 0,
vx0: 0, vys: 0,
duration: 0,
resumeDx: 0,
resumeDy: 0,
lambda_v0: 0,
one_ve_v0: 0,
i : null
};
if (isFunction(Function.prototype.bind)) {
this.boundInertiaFrame = this.inertiaFrame.bind(this);
this.boundSmoothEndFrame = this.smoothEndFrame.bind(this);
}
else {
var that = this;
this.boundInertiaFrame = function () { return that.inertiaFrame(); };
this.boundSmoothEndFrame = function () { return that.smoothEndFrame(); };
}
this.activeDrops = {
dropzones: [], // the dropzones that are mentioned below
elements : [], // elements of dropzones that accept the target draggable
rects : [] // the rects of the elements mentioned above
};
// keep track of added pointers
this.pointers = [];
this.pointerIds = [];
this.downTargets = [];
this.downTimes = [];
this.holdTimers = [];
// Previous native pointer move event coordinates
this.prevCoords = {
page : { x: 0, y: 0 },
client : { x: 0, y: 0 },
timeStamp: 0
};
// current native pointer move event coordinates
this.curCoords = {
page : { x: 0, y: 0 },
client : { x: 0, y: 0 },
timeStamp: 0
};
// Starting InteractEvent pointer coordinates
this.startCoords = {
page : { x: 0, y: 0 },
client : { x: 0, y: 0 },
timeStamp: 0
};
// Change in coordinates and time of the pointer
this.pointerDelta = {
page : { x: 0, y: 0, vx: 0, vy: 0, speed: 0 },
client : { x: 0, y: 0, vx: 0, vy: 0, speed: 0 },
timeStamp: 0
};
this.downEvent = null; // pointerdown/mousedown/touchstart event
this.downPointer = {};
this._eventTarget = null;
this._curEventTarget = null;
this.prevEvent = null; // previous action event
this.tapTime = 0; // time of the most recent tap event
this.prevTap = null;
this.startOffset = { left: 0, right: 0, top: 0, bottom: 0 };
this.restrictOffset = { left: 0, right: 0, top: 0, bottom: 0 };
this.snapOffsets = [];
this.gesture = {
start: { x: 0, y: 0 },
startDistance: 0, // distance between two touches of touchStart
prevDistance : 0,
distance : 0,
scale: 1, // gesture.distance / gesture.startDistance
startAngle: 0, // angle of line joining two touches
prevAngle : 0 // angle of the previous gesture event
};
this.snapStatus = {
x : 0, y : 0,
dx : 0, dy : 0,
realX : 0, realY : 0,
snappedX: 0, snappedY: 0,
targets : [],
locked : false,
changed : false
};
this.restrictStatus = {
dx : 0, dy : 0,
restrictedX: 0, restrictedY: 0,
snap : null,
restricted : false,
changed : false
};
this.restrictStatus.snap = this.snapStatus;
this.pointerIsDown = false;
this.pointerWasMoved = false;
this.gesturing = false;
this.dragging = false;
this.resizing = false;
this.resizeAxes = 'xy';
this.mouse = false;
interactions.push(this);
}
Interaction.prototype = {
getPageXY : function (pointer, xy) { return getPageXY(pointer, xy, this); },
getClientXY: function (pointer, xy) { return getClientXY(pointer, xy, this); },
setEventXY : function (target, ptr) { return setEventXY(target, ptr, this); },
pointerOver: function (pointer, event, eventTarget) {
if (this.prepared.name || !this.mouse) { return; }
var curMatches = [],
curMatchElements = [],
prevTargetElement = this.element;
this.addPointer(pointer);
if (this.target
&& (testIgnore(this.target, this.element, eventTarget)
|| !testAllow(this.target, this.element, eventTarget))) {
// if the eventTarget should be ignored or shouldn't be allowed
// clear the previous target
this.target = null;
this.element = null;
this.matches = [];
this.matchElements = [];
}
var elementInteractable = interactables.get(eventTarget),
elementAction = (elementInteractable
&& !testIgnore(elementInteractable, eventTarget, eventTarget)
&& testAllow(elementInteractable, eventTarget, eventTarget)
&& validateAction(
elementInteractable.getAction(pointer, this, eventTarget),
elementInteractable));
if (elementAction && !withinInteractionLimit(elementInteractable, eventTarget, elementAction)) {
elementAction = null;
}
function pushCurMatches (interactable, selector) {
if (interactable
&& inContext(interactable, eventTarget)
&& !testIgnore(interactable, eventTarget, eventTarget)
&& testAllow(interactable, eventTarget, eventTarget)
&& matchesSelector(eventTarget, selector)) {
curMatches.push(interactable);
curMatchElements.push(eventTarget);
}
}
if (elementAction) {
this.target = elementInteractable;
this.element = eventTarget;
this.matches = [];
this.matchElements = [];
}
else {
interactables.forEachSelector(pushCurMatches);
if (this.validateSelector(pointer, curMatches, curMatchElements)) {
this.matches = curMatches;
this.matchElements = curMatchElements;
this.pointerHover(pointer, event, this.matches, this.matchElements);
events.add(eventTarget,
PointerEvent? pEventTypes.move : 'mousemove',
listeners.pointerHover);
}
else if (this.target) {
if (nodeContains(prevTargetElement, eventTarget)) {
this.pointerHover(pointer, event, this.matches, this.matchElements);
events.add(this.element,
PointerEvent? pEventTypes.move : 'mousemove',
listeners.pointerHover);
}
else {
this.target = null;
this.element = null;
this.matches = [];
this.matchElements = [];
}
}
}
},
// Check what action would be performed on pointerMove target if a mouse
// button were pressed and change the cursor accordingly
pointerHover: function (pointer, event, eventTarget, curEventTarget, matches, matchElements) {
var target = this.target;
if (!this.prepared.name && this.mouse) {
var action;
// update pointer coords for defaultActionChecker to use
this.setEventXY(this.curCoords, pointer);
if (matches) {
action = this.validateSelector(pointer, matches, matchElements);
}
else if (target) {
action = validateAction(target.getAction(this.pointers[0], this, this.element), this.target);
}
if (target && target.options.styleCursor) {
if (action) {
target._doc.documentElement.style.cursor = getActionCursor(action);
}
else {
target._doc.documentElement.style.cursor = '';
}
}
}
else if (this.prepared.name) {
this.checkAndPreventDefault(event, target, this.element);
}
},
pointerOut: function (pointer, event, eventTarget) {
if (this.prepared.name) { return; }
// Remove temporary event listeners for selector Interactables
if (!interactables.get(eventTarget)) {
events.remove(eventTarget,
PointerEvent? pEventTypes.move : 'mousemove',
listeners.pointerHover);
}
if (this.target && this.target.options.styleCursor && !this.interacting()) {
this.target._doc.documentElement.style.cursor = '';
}
},
selectorDown: function (pointer, event, eventTarget, curEventTarget) {
var that = this,
// copy event to be used in timeout for IE8
eventCopy = events.useAttachEvent? extend({}, event) : event,
element = eventTarget,
pointerIndex = this.addPointer(pointer),
action;
this.holdTimers[pointerIndex] = setTimeout(function () {
that.pointerHold(events.useAttachEvent? eventCopy : pointer, eventCopy, eventTarget, curEventTarget);
}, defaultOptions._holdDuration);
this.pointerIsDown = true;
// Check if the down event hits the current inertia target
if (this.inertiaStatus.active && this.target.selector) {
// climb up the DOM tree from the event target
while (isElement(element)) {
// if this element is the current inertia target element
if (element === this.element
// and the prospective action is the same as the ongoing one
&& validateAction(this.target.getAction(pointer, this, this.element), this.target).name === this.prepared.name) {
// stop inertia so that the next move will be a normal one
cancelFrame(this.inertiaStatus.i);
this.inertiaStatus.active = false;
this.collectEventTargets(pointer, event, eventTarget, 'down');
return;
}
element = parentElement(element);
}
}
// do nothing if interacting
if (this.interacting()) {
this.collectEventTargets(pointer, event, eventTarget, 'down');
return;
}
function pushMatches (interactable, selector, context) {
var elements = ie8MatchesSelector
? context.querySelectorAll(selector)
: undefined;
if (inContext(interactable, element)
&& !testIgnore(interactable, element, eventTarget)
&& testAllow(interactable, element, eventTarget)
&& matchesSelector(element, selector, elements)) {
that.matches.push(interactable);
that.matchElements.push(element);
}
}
// update pointer coords for defaultActionChecker to use
this.setEventXY(this.curCoords, pointer);
while (isElement(element) && !action) {
this.matches = [];
this.matchElements = [];
interactables.forEachSelector(pushMatches);
action = this.validateSelector(pointer, this.matches, this.matchElements);
element = parentElement(element);
}
if (action) {
this.prepared.name = action.name;
this.prepared.axis = action.axis;
this.prepared.edges = action.edges;
this.collectEventTargets(pointer, event, eventTarget, 'down');
return this.pointerDown(pointer, event, eventTarget, curEventTarget, action);
}
else {
// do these now since pointerDown isn't being called from here
this.downTimes[pointerIndex] = new Date().getTime();
this.downTargets[pointerIndex] = eventTarget;
this.downEvent = event;
extend(this.downPointer, pointer);
copyCoords(this.prevCoords, this.curCoords);
this.pointerWasMoved = false;
}
this.collectEventTargets(pointer, event, eventTarget, 'down');
},
// Determine action to be performed on next pointerMove and add appropriate
// style and event Listeners
pointerDown: function (pointer, event, eventTarget, curEventTarget, forceAction) {
if (!forceAction && !this.inertiaStatus.active && this.pointerWasMoved && this.prepared.name) {
this.checkAndPreventDefault(event, this.target, this.element);
return;
}
this.pointerIsDown = true;
var pointerIndex = this.addPointer(pointer),
action;
// If it is the second touch of a multi-touch gesture, keep the target
// the same if a target was set by the first touch
// Otherwise, set the target if there is no action prepared
if ((this.pointerIds.length < 2 && !this.target) || !this.prepared.name) {
var interactable = interactables.get(curEventTarget);
if (interactable
&& !testIgnore(interactable, curEventTarget, eventTarget)
&& testAllow(interactable, curEventTarget, eventTarget)
&& (action = validateAction(forceAction || interactable.getAction(pointer, this, curEventTarget), interactable, eventTarget))
&& withinInteractionLimit(interactable, curEventTarget, action)) {
this.target = interactable;
this.element = curEventTarget;
}
}
var target = this.target,
options = target && target.options;
if (target && !this.interacting()) {
action = action || validateAction(forceAction || target.getAction(pointer, this, curEventTarget), target, this.element);
this.setEventXY(this.startCoords);
if (!action) { return; }
if (options.styleCursor) {
target._doc.documentElement.style.cursor = getActionCursor(action);
}
this.resizeAxes = action.name === 'resize'? action.axis : null;
if (action === 'gesture' && this.pointerIds.length < 2) {
action = null;
}
this.prepared.name = action.name;
this.prepared.axis = action.axis;
this.prepared.edges = action.edges;
this.snapStatus.snappedX = this.snapStatus.snappedY =
this.restrictStatus.restrictedX = this.restrictStatus.restrictedY = NaN;
this.downTimes[pointerIndex] = new Date().getTime();
this.downTargets[pointerIndex] = eventTarget;
this.downEvent = event;
extend(this.downPointer, pointer);
this.setEventXY(this.prevCoords);
this.pointerWasMoved = false;
this.checkAndPreventDefault(event, target, this.element);
}
// if inertia is active try to resume action
else if (this.inertiaStatus.active
&& curEventTarget === this.element
&& validateAction(target.getAction(pointer, this, this.element), target).name === this.prepared.name) {
cancelFrame(this.inertiaStatus.i);
this.inertiaStatus.active = false;
this.checkAndPreventDefault(event, target, this.element);
}
},
setModifications: function (coords, preEnd) {
var target = this.target,
shouldMove = true,
shouldSnap = checkSnap(target, this.prepared.name) && (!target.options[this.prepared.name].snap.endOnly || preEnd),
shouldRestrict = checkRestrict(target, this.prepared.name) && (!target.options[this.prepared.name].restrict.endOnly || preEnd);
if (shouldSnap ) { this.setSnapping (coords); } else { this.snapStatus .locked = false; }
if (shouldRestrict) { this.setRestriction(coords); } else { this.restrictStatus.restricted = false; }
if (shouldSnap && this.snapStatus.locked && !this.snapStatus.changed) {
shouldMove = shouldRestrict && this.restrictStatus.restricted && this.restrictStatus.changed;
}
else if (shouldRestrict && this.restrictStatus.restricted && !this.restrictStatus.changed) {
shouldMove = false;
}
return shouldMove;
},
setStartOffsets: function (action, interactable, element) {
var rect = interactable.getRect(element),
origin = getOriginXY(interactable, element),
snap = interactable.options[this.prepared.name].snap,
restrict = interactable.options[this.prepared.name].restrict,
width, height;
if (rect) {
this.startOffset.left = this.startCoords.page.x - rect.left;
this.startOffset.top = this.startCoords.page.y - rect.top;
this.startOffset.right = rect.right - this.startCoords.page.x;
this.startOffset.bottom = rect.bottom - this.startCoords.page.y;
if ('width' in rect) { width = rect.width; }
else { width = rect.right - rect.left; }
if ('height' in rect) { height = rect.height; }
else { height = rect.bottom - rect.top; }
}
else {
this.startOffset.left = this.startOffset.top = this.startOffset.right = this.startOffset.bottom = 0;
}
this.snapOffsets.splice(0);
var snapOffset = snap && snap.offset === 'startCoords'
? {
x: this.startCoords.page.x - origin.x,
y: this.startCoords.page.y - origin.y
}
: snap && snap.offset || { x: 0, y: 0 };
if (rect && snap && snap.relativePoints && snap.relativePoints.length) {
for (var i = 0; i < snap.relativePoints.length; i++) {
this.snapOffsets.push({
x: this.startOffset.left - (width * snap.relativePoints[i].x) + snapOffset.x,
y: this.startOffset.top - (height * snap.relativePoints[i].y) + snapOffset.y
});
}
}
else {
this.snapOffsets.push(snapOffset);
}
if (rect && restrict.elementRect) {
this.restrictOffset.left = this.startOffset.left - (width * restrict.elementRect.left);
this.restrictOffset.top = this.startOffset.top - (height * restrict.elementRect.top);
this.restrictOffset.right = this.startOffset.right - (width * (1 - restrict.elementRect.right));
this.restrictOffset.bottom = this.startOffset.bottom - (height * (1 - restrict.elementRect.bottom));
}
else {
this.restrictOffset.left = this.restrictOffset.top = this.restrictOffset.right = this.restrictOffset.bottom = 0;
}
},
/*\
* Interaction.start
[ method ]
*
* Start an action with the given Interactable and Element as tartgets. The
* action must be enabled for the target Interactable and an appropriate number
* of pointers must be held down – 1 for drag/resize, 2 for gesture.
*
* Use it with `interactable.<action>able({ manualStart: false })` to always
* [start actions manually](https://github.com/taye/interact.js/issues/114)
*
- action (object) The action to be performed - drag, resize, etc.
- interactable (Interactable) The Interactable to target
- element (Element) The DOM Element to target
= (object) interact
**
| interact(target)
| .draggable({
| // disable the default drag start by down->move
| manualStart: true
| })
| // start dragging after the user holds the pointer down
| .on('hold', function (event) {
| var interaction = event.interaction;
|
| if (!interaction.interacting()) {
| interaction.start({ name: 'drag' },
| event.interactable,
| event.currentTarget);
| }
| });
\*/
start: function (action, interactable, element) {
if (this.interacting()
|| !this.pointerIsDown
|| this.pointerIds.length < (action.name === 'gesture'? 2 : 1)) {
return;
}
// if this interaction had been removed after stopping
// add it back
if (indexOf(interactions, this) === -1) {
interactions.push(this);
}
this.prepared.name = action.name;
this.prepared.axis = action.axis;
this.prepared.edges = action.edges;
this.target = interactable;
this.element = element;
this.setStartOffsets(action.name, interactable, element);
this.setModifications(this.startCoords.page);
this.prevEvent = this[this.prepared.name + 'Start'](this.downEvent);
},
pointerMove: function (pointer, event, eventTarget, curEventTarget, preEnd) {
this.recordPointer(pointer);
this.setEventXY(this.curCoords, (pointer instanceof InteractEvent)
? this.inertiaStatus.startEvent
: undefined);
var duplicateMove = (this.curCoords.page.x === this.prevCoords.page.x
&& this.curCoords.page.y === this.prevCoords.page.y
&& this.curCoords.client.x === this.prevCoords.client.x
&& this.curCoords.client.y === this.prevCoords.client.y);
var dx, dy,
pointerIndex = this.mouse? 0 : indexOf(this.pointerIds, getPointerId(pointer));
// register movement greater than pointerMoveTolerance
if (this.pointerIsDown && !this.pointerWasMoved) {
dx = this.curCoords.client.x - this.startCoords.client.x;
dy = this.curCoords.client.y - this.startCoords.client.y;
this.pointerWasMoved = hypot(dx, dy) > pointerMoveTolerance;
}
if (!duplicateMove && (!this.pointerIsDown || this.pointerWasMoved)) {
if (this.pointerIsDown) {
clearTimeout(this.holdTimers[pointerIndex]);
}
this.collectEventTargets(pointer, event, eventTarget, 'move');
}
if (!this.pointerIsDown) { return; }
if (duplicateMove && this.pointerWasMoved && !preEnd) {
this.checkAndPreventDefault(event, this.target, this.element);
return;
}
// set pointer coordinate, time changes and speeds
setEventDeltas(this.pointerDelta, this.prevCoords, this.curCoords);
if (!this.prepared.name) { return; }
if (this.pointerWasMoved
// ignore movement while inertia is active
&& (!this.inertiaStatus.active || (pointer instanceof InteractEvent && /inertiastart/.test(pointer.type)))) {
// if just starting an action, calculate the pointer speed now
if (!this.interacting()) {
setEventDeltas(this.pointerDelta, this.prevCoords, this.curCoords);
// check if a drag is in the correct axis
if (this.prepared.name === 'drag') {
var absX = Math.abs(dx),
absY = Math.abs(dy),
targetAxis = this.target.options.drag.axis,
axis = (absX > absY ? 'x' : absX < absY ? 'y' : 'xy');
// if the movement isn't in the axis of the interactable
if (axis !== 'xy' && targetAxis !== 'xy' && targetAxis !== axis) {
// cancel the prepared action
this.prepared.name = null;
// then try to get a drag from another ineractable
var element = eventTarget;
// check element interactables
while (isElement(element)) {
var elementInteractable = interactables.get(element);
if (elementInteractable
&& elementInteractable !== this.target
&& !elementInteractable.options.drag.manualStart
&& elementInteractable.getAction(this.downPointer, this, element).name === 'drag'
&& checkAxis(axis, elementInteractable)) {
this.prepared.name = 'drag';
this.target = elementInteractable;
this.element = element;
break;
}
element = parentElement(element);
}
// if there's no drag from element interactables,
// check the selector interactables
if (!this.prepared.name) {
var getDraggable = function (interactable, selector, context) {
var elements = ie8MatchesSelector
? context.querySelectorAll(selector)
: undefined;
if (interactable === this.target) { return; }
if (inContext(interactable, eventTarget)
&& !interactable.options.drag.manualStart
&& !testIgnore(interactable, element, eventTarget)
&& testAllow(interactable, element, eventTarget)
&& matchesSelector(element, selector, elements)
&& interactable.getAction(this.downPointer, this, element).name === 'drag'
&& checkAxis(axis, interactable)
&& withinInteractionLimit(interactable, element, 'drag')) {
return interactable;
}
};
element = eventTarget;
while (isElement(element)) {
var selectorInteractable = interactables.forEachSelector(getDraggable);
if (selectorInteractable) {
this.prepared.name = 'drag';
this.target = selectorInteractable;
this.element = element;
break;
}
element = parentElement(element);
}
}
}
}
}
var starting = !!this.prepared.name && !this.interacting();
if (starting
&& (this.target.options[this.prepared.name].manualStart
|| !withinInteractionLimit(this.target, this.element, this.prepared))) {
this.stop();
return;
}
if (this.prepared.name && this.target) {
if (starting) {
this.start(this.prepared, this.target, this.element);
}
var shouldMove = this.setModifications(this.curCoords.page, preEnd);
// move if snapping or restriction doesn't prevent it
if (shouldMove || starting) {
this.prevEvent = this[this.prepared.name + 'Move'](event);
}
this.checkAndPreventDefault(event, this.target, this.element);
}
}
copyCoords(this.prevCoords, this.curCoords);
if (this.dragging || this.resizing) {
autoScroll.edgeMove(event);
}
},
dragStart: function (event) {
var dragEvent = new InteractEvent(this, event, 'drag', 'start', this.element);
this.dragging = true;
this.target.fire(dragEvent);
// reset active dropzones
this.activeDrops.dropzones = [];
this.activeDrops.elements = [];
this.activeDrops.rects = [];
if (!this.dynamicDrop) {
this.setActiveDrops(this.element);
}
var dropEvents = this.getDropEvents(event, dragEvent);
if (dropEvents.activate) {
this.fireActiveDrops(dropEvents.activate);
}
return dragEvent;
},
dragMove: function (event) {
var target = this.target,
dragEvent = new InteractEvent(this, event, 'drag', 'move', this.element),
draggableElement = this.element,
drop = this.getDrop(dragEvent, draggableElement);
this.dropTarget = drop.dropzone;
this.dropElement = drop.element;
var dropEvents = this.getDropEvents(event, dragEvent);
target.fire(dragEvent);
if (dropEvents.leave) { this.prevDropTarget.fire(dropEvents.leave); }
if (dropEvents.enter) { this.dropTarget.fire(dropEvents.enter); }
if (dropEvents.move ) { this.dropTarget.fire(dropEvents.move ); }
this.prevDropTarget = this.dropTarget;
this.prevDropElement = this.dropElement;
return dragEvent;
},
resizeStart: function (event) {
var resizeEvent = new InteractEvent(this, event, 'resize', 'start', this.element);
if (this.prepared.edges) {
var startRect = this.target.getRect(this.element);
if (this.target.options.resize.square) {
var squareEdges = extend({}, this.prepared.edges);
squareEdges.top = squareEdges.top || (squareEdges.left && !squareEdges.bottom);
squareEdges.left = squareEdges.left || (squareEdges.top && !squareEdges.right );
squareEdges.bottom = squareEdges.bottom || (squareEdges.right && !squareEdges.top );
squareEdges.right = squareEdges.right || (squareEdges.bottom && !squareEdges.left );
this.prepared._squareEdges = squareEdges;
}
else {
this.prepared._squareEdges = null;
}
this.resizeRects = {
start : startRect,
current : extend({}, startRect),
restricted: extend({}, startRect),
previous : extend({}, startRect),
delta : {
left: 0, right : 0, width : 0,
top : 0, bottom: 0, height: 0
}
};
resizeEvent.rect = this.resizeRects.restricted;
resizeEvent.deltaRect = this.resizeRects.delta;
}
this.target.fire(resizeEvent);
this.resizing = true;
return resizeEvent;
},
resizeMove: function (event) {
var resizeEvent = new InteractEvent(this, event, 'resize', 'move', this.element);
var edges = this.prepared.edges,
invert = this.target.options.resize.invert,
invertible = invert === 'reposition' || invert === 'negate';
if (edges) {
var dx = resizeEvent.dx,
dy = resizeEvent.dy,
start = this.resizeRects.start,
current = this.resizeRects.current,
restricted = this.resizeRects.restricted,
delta = this.resizeRects.delta,
previous = extend(this.resizeRects.previous, restricted);
if (this.target.options.resize.square) {
var originalEdges = edges;
edges = this.prepared._squareEdges;
if ((originalEdges.left && originalEdges.bottom)
|| (originalEdges.right && originalEdges.top)) {
dy = -dx;
}
else if (originalEdges.left || originalEdges.right) { dy = dx; }
else if (originalEdges.top || originalEdges.bottom) { dx = dy; }
}
// update the 'current' rect without modifications
if (edges.top ) { current.top += dy; }
if (edges.bottom) { current.bottom += dy; }
if (edges.left ) { current.left += dx; }
if (edges.right ) { current.right += dx; }
if (invertible) {
// if invertible, copy the current rect
extend(restricted, current);
if (invert === 'reposition') {
// swap edge values if necessary to keep width/height positive
var swap;
if (restricted.top > restricted.bottom) {
swap = restricted.top;
restricted.top = restricted.bottom;
restricted.bottom = swap;
}
if (restricted.left > restricted.right) {
swap = restricted.left;
restricted.left = restricted.right;
restricted.right = swap;
}
}
}
else {
// if not invertible, restrict to minimum of 0x0 rect
restricted.top = Math.min(current.top, start.bottom);
restricted.bottom = Math.max(current.bottom, start.top);
restricted.left = Math.min(current.left, start.right);
restricted.right = Math.max(current.right, start.left);
}
restricted.width = restricted.right - restricted.left;
restricted.height = restricted.bottom - restricted.top ;
for (var edge in restricted) {
delta[edge] = restricted[edge] - previous[edge];
}
resizeEvent.edges = this.prepared.edges;
resizeEvent.rect = restricted;
resizeEvent.deltaRect = delta;
}
this.target.fire(resizeEvent);
return resizeEvent;
},
gestureStart: function (event) {
var gestureEvent = new InteractEvent(this, event, 'gesture', 'start', this.element);
gestureEvent.ds = 0;
this.gesture.startDistance = this.gesture.prevDistance = gestureEvent.distance;
this.gesture.startAngle = this.gesture.prevAngle = gestureEvent.angle;
this.gesture.scale = 1;
this.gesturing = true;
this.target.fire(gestureEvent);
return gestureEvent;
},
gestureMove: function (event) {
if (!this.pointerIds.length) {
return this.prevEvent;
}
var gestureEvent;
gestureEvent = new InteractEvent(this, event, 'gesture', 'move', this.element);
gestureEvent.ds = gestureEvent.scale - this.gesture.scale;
this.target.fire(gestureEvent);
this.gesture.prevAngle = gestureEvent.angle;
this.gesture.prevDistance = gestureEvent.distance;
if (gestureEvent.scale !== Infinity &&
gestureEvent.scale !== null &&
gestureEvent.scale !== undefined &&
!isNaN(gestureEvent.scale)) {
this.gesture.scale = gestureEvent.scale;
}
return gestureEvent;
},
pointerHold: function (pointer, event, eventTarget) {
this.collectEventTargets(pointer, event, eventTarget, 'hold');
},
pointerUp: function (pointer, event, eventTarget, curEventTarget) {
var pointerIndex = this.mouse? 0 : indexOf(this.pointerIds, getPointerId(pointer));
clearTimeout(this.holdTimers[pointerIndex]);
this.collectEventTargets(pointer, event, eventTarget, 'up' );
this.collectEventTargets(pointer, event, eventTarget, 'tap');
this.pointerEnd(pointer, event, eventTarget, curEventTarget);
this.removePointer(pointer);
},
pointerCancel: function (pointer, event, eventTarget, curEventTarget) {
var pointerIndex = this.mouse? 0 : indexOf(this.pointerIds, getPointerId(pointer));
clearTimeout(this.holdTimers[pointerIndex]);
this.collectEventTargets(pointer, event, eventTarget, 'cancel');
this.pointerEnd(pointer, event, eventTarget, curEventTarget);
this.removePointer(pointer);
},
// http://www.quirksmode.org/dom/events/click.html
// >Events leading to dblclick
//
// IE8 doesn't fire down event before dblclick.
// This workaround tries to fire a tap and doubletap after dblclick
ie8Dblclick: function (pointer, event, eventTarget) {
if (this.prevTap
&& event.clientX === this.prevTap.clientX
&& event.clientY === this.prevTap.clientY
&& eventTarget === this.prevTap.target) {
this.downTargets[0] = eventTarget;
this.downTimes[0] = new Date().getTime();
this.collectEventTargets(pointer, event, eventTarget, 'tap');
}
},
// End interact move events and stop auto-scroll unless inertia is enabled
pointerEnd: function (pointer, event, eventTarget, curEventTarget) {
var endEvent,
target = this.target,
options = target && target.options,
inertiaOptions = options && this.prepared.name && options[this.prepared.name].inertia,
inertiaStatus = this.inertiaStatus;
if (this.interacting()) {
if (inertiaStatus.active) { return; }
var pointerSpeed,
now = new Date().getTime(),
inertiaPossible = false,
inertia = false,
smoothEnd = false,
endSnap = checkSnap(target, this.prepared.name) && options[this.prepared.name].snap.endOnly,
endRestrict = checkRestrict(target, this.prepared.name) && options[this.prepared.name].restrict.endOnly,
dx = 0,
dy = 0,
startEvent;
if (this.dragging) {
if (options.drag.axis === 'x' ) { pointerSpeed = Math.abs(this.pointerDelta.client.vx); }
else if (options.drag.axis === 'y' ) { pointerSpeed = Math.abs(this.pointerDelta.client.vy); }
else /*options.drag.axis === 'xy'*/{ pointerSpeed = this.pointerDelta.client.speed; }
}
else {
pointerSpeed = this.pointerDelta.client.speed;
}
// check if inertia should be started
inertiaPossible = (inertiaOptions && inertiaOptions.enabled
&& this.prepared.name !== 'gesture'
&& event !== inertiaStatus.startEvent);
inertia = (inertiaPossible
&& (now - this.curCoords.timeStamp) < 50
&& pointerSpeed > inertiaOptions.minSpeed
&& pointerSpeed > inertiaOptions.endSpeed);
if (inertiaPossible && !inertia && (endSnap || endRestrict)) {
var snapRestrict = {};
snapRestrict.snap = snapRestrict.restrict = snapRestrict;
if (endSnap) {
this.setSnapping(this.curCoords.page, snapRestrict);
if (snapRestrict.locked) {
dx += snapRestrict.dx;
dy += snapRestrict.dy;
}
}
if (endRestrict) {
this.setRestriction(this.curCoords.page, snapRestrict);
if (snapRestrict.restricted) {
dx += snapRestrict.dx;
dy += snapRestrict.dy;
}
}
if (dx || dy) {
smoothEnd = true;
}
}
if (inertia || smoothEnd) {
copyCoords(inertiaStatus.upCoords, this.curCoords);
this.pointers[0] = inertiaStatus.startEvent = startEvent =
new InteractEvent(this, event, this.prepared.name, 'inertiastart', this.element);
inertiaStatus.t0 = now;
target.fire(inertiaStatus.startEvent);
if (inertia) {
inertiaStatus.vx0 = this.pointerDelta.client.vx;
inertiaStatus.vy0 = this.pointerDelta.client.vy;
inertiaStatus.v0 = pointerSpeed;
this.calcInertia(inertiaStatus);
var page = extend({}, this.curCoords.page),
origin = getOriginXY(target, this.element),
statusObject;
page.x = page.x + inertiaStatus.xe - origin.x;
page.y = page.y + inertiaStatus.ye - origin.y;
statusObject = {
useStatusXY: true,
x: page.x,
y: page.y,
dx: 0,
dy: 0,
snap: null
};
statusObject.snap = statusObject;
dx = dy = 0;
if (endSnap) {
var snap = this.setSnapping(this.curCoords.page, statusObject);
if (snap.locked) {
dx += snap.dx;
dy += snap.dy;
}
}
if (endRestrict) {
var restrict = this.setRestriction(this.curCoords.page, statusObject);
if (restrict.restricted) {
dx += restrict.dx;
dy += restrict.dy;
}
}
inertiaStatus.modifiedXe += dx;
inertiaStatus.modifiedYe += dy;
inertiaStatus.i = reqFrame(this.boundInertiaFrame);
}
else {
inertiaStatus.smoothEnd = true;
inertiaStatus.xe = dx;
inertiaStatus.ye = dy;
inertiaStatus.sx = inertiaStatus.sy = 0;
inertiaStatus.i = reqFrame(this.boundSmoothEndFrame);
}
inertiaStatus.active = true;
return;
}
if (endSnap || endRestrict) {
// fire a move event at the snapped coordinates
this.pointerMove(pointer, event, eventTarget, curEventTarget, true);
}
}
if (this.dragging) {
endEvent = new InteractEvent(this, event, 'drag', 'end', this.element);
var draggableElement = this.element,
drop = this.getDrop(endEvent, draggableElement);
this.dropTarget = drop.dropzone;
this.dropElement = drop.element;
var dropEvents = this.getDropEvents(event, endEvent);
if (dropEvents.leave) { this.prevDropTarget.fire(dropEvents.leave); }
if (dropEvents.enter) { this.dropTarget.fire(dropEvents.enter); }
if (dropEvents.drop ) { this.dropTarget.fire(dropEvents.drop ); }
if (dropEvents.deactivate) {
this.fireActiveDrops(dropEvents.deactivate);
}
target.fire(endEvent);
}
else if (this.resizing) {
endEvent = new InteractEvent(this, event, 'resize', 'end', this.element);
target.fire(endEvent);
}
else if (this.gesturing) {
endEvent = new InteractEvent(this, event, 'gesture', 'end', this.element);
target.fire(endEvent);
}
this.stop(event);
},
collectDrops: function (element) {
var drops = [],
elements = [],
i;
element = element || this.element;
// collect all dropzones and their elements which qualify for a drop
for (i = 0; i < interactables.length; i++) {
if (!interactables[i].options.drop.enabled) { continue; }
var current = interactables[i],
accept = current.options.drop.accept;
// test the draggable element against the dropzone's accept setting
if ((isElement(accept) && accept !== element)
|| (isString(accept)
&& !matchesSelector(element, accept))) {
continue;
}
// query for new elements if necessary
var dropElements = current.selector? current._context.querySelectorAll(current.selector) : [current._element];
for (var j = 0, len = dropElements.length; j < len; j++) {
var currentElement = dropElements[j];
if (currentElement === element) {
continue;
}
drops.push(current);
elements.push(currentElement);
}
}
return {
dropzones: drops,
elements: elements
};
},
fireActiveDrops: function (event) {
var i,
current,
currentElement,
prevElement;
// loop through all active dropzones and trigger event
for (i = 0; i < this.activeDrops.dropzones.length; i++) {
current = this.activeDrops.dropzones[i];
currentElement = this.activeDrops.elements [i];
// prevent trigger of duplicate events on same element
if (currentElement !== prevElement) {
// set current element as event target
event.target = currentElement;
current.fire(event);
}
prevElement = currentElement;
}
},
// Collect a new set of possible drops and save them in activeDrops.
// setActiveDrops should always be called when a drag has just started or a
// drag event happens while dynamicDrop is true
setActiveDrops: function (dragElement) {
// get dropzones and their elements that could receive the draggable
var possibleDrops = this.collectDrops(dragElement, true);
this.activeDrops.dropzones = possibleDrops.dropzones;
this.activeDrops.elements = possibleDrops.elements;
this.activeDrops.rects = [];
for (var i = 0; i < this.activeDrops.dropzones.length; i++) {
this.activeDrops.rects[i] = this.activeDrops.dropzones[i].getRect(this.activeDrops.elements[i]);
}
},
getDrop: function (event, dragElement) {
var validDrops = [];
if (dynamicDrop) {
this.setActiveDrops(dragElement);
}
// collect all dropzones and their elements which qualify for a drop
for (var j = 0; j < this.activeDrops.dropzones.length; j++) {
var current = this.activeDrops.dropzones[j],
currentElement = this.activeDrops.elements [j],
rect = this.activeDrops.rects [j];
validDrops.push(current.dropCheck(this.pointers[0], this.target, dragElement, currentElement, rect)
? currentElement
: null);
}
// get the most appropriate dropzone based on DOM depth and order
var dropIndex = indexOfDeepestElement(validDrops),
dropzone = this.activeDrops.dropzones[dropIndex] || null,
element = this.activeDrops.elements [dropIndex] || null;
return {
dropzone: dropzone,
element: element
};
},
getDropEvents: function (pointerEvent, dragEvent) {
var dropEvents = {
enter : null,
leave : null,
activate : null,
deactivate: null,
move : null,
drop : null
};
if (this.dropElement !== this.prevDropElement) {
// if there was a prevDropTarget, create a dragleave event
if (this.prevDropTarget) {
dropEvents.leave = {
target : this.prevDropElement,
dropzone : this.prevDropTarget,
relatedTarget: dragEvent.target,
draggable : dragEvent.interactable,
dragEvent : dragEvent,
interaction : this,
timeStamp : dragEvent.timeStamp,
type : 'dragleave'
};
dragEvent.dragLeave = this.prevDropElement;
dragEvent.prevDropzone = this.prevDropTarget;
}
// if the dropTarget is not null, create a dragenter event
if (this.dropTarget) {
dropEvents.enter = {
target : this.dropElement,
dropzone : this.dropTarget,
relatedTarget: dragEvent.target,
draggable : dragEvent.interactable,
dragEvent : dragEvent,
interaction : this,
timeStamp : dragEvent.timeStamp,
type : 'dragenter'
};
dragEvent.dragEnter = this.dropElement;
dragEvent.dropzone = this.dropTarget;
}
}
if (dragEvent.type === 'dragend' && this.dropTarget) {
dropEvents.drop = {
target : this.dropElement,
dropzone : this.dropTarget,
relatedTarget: dragEvent.target,
draggable : dragEvent.interactable,
dragEvent : dragEvent,
interaction : this,
timeStamp : dragEvent.timeStamp,
type : 'drop'
};
}
if (dragEvent.type === 'dragstart') {
dropEvents.activate = {
target : null,
dropzone : null,
relatedTarget: dragEvent.target,
draggable : dragEvent.interactable,
dragEvent : dragEvent,
interaction : this,
timeStamp : dragEvent.timeStamp,
type : 'dropactivate'
};
}
if (dragEvent.type === 'dragend') {
dropEvents.deactivate = {
target : null,
dropzone : null,
relatedTarget: dragEvent.target,
draggable : dragEvent.interactable,
dragEvent : dragEvent,
interaction : this,
timeStamp : dragEvent.timeStamp,
type : 'dropdeactivate'
};
}
if (dragEvent.type === 'dragmove' && this.dropTarget) {
dropEvents.move = {
target : this.dropElement,
dropzone : this.dropTarget,
relatedTarget: dragEvent.target,
draggable : dragEvent.interactable,
dragEvent : dragEvent,
interaction : this,
dragmove : dragEvent,
timeStamp : dragEvent.timeStamp,
type : 'dropmove'
};
dragEvent.dropzone = this.dropTarget;
}
return dropEvents;
},
currentAction: function () {
return (this.dragging && 'drag') || (this.resizing && 'resize') || (this.gesturing && 'gesture') || null;
},
interacting: function () {
return this.dragging || this.resizing || this.gesturing;
},
clearTargets: function () {
if (this.target && !this.target.selector) {
this.target = this.element = null;
}
this.dropTarget = this.dropElement = this.prevDropTarget = this.prevDropElement = null;
},
stop: function (event) {
if (this.interacting()) {
autoScroll.stop();
this.matches = [];
this.matchElements = [];
var target = this.target;
if (target.options.styleCursor) {
target._doc.documentElement.style.cursor = '';
}
// prevent Default only if were previously interacting
if (event && isFunction(event.preventDefault)) {
this.checkAndPreventDefault(event, target, this.element);
}
if (this.dragging) {
this.activeDrops.dropzones = this.activeDrops.elements = this.activeDrops.rects = null;
}
this.clearTargets();
}
this.pointerIsDown = this.snapStatus.locked = this.dragging = this.resizing = this.gesturing = false;
this.prepared.name = this.prevEvent = null;
this.inertiaStatus.resumeDx = this.inertiaStatus.resumeDy = 0;
// remove pointers if their ID isn't in this.pointerIds
for (var i = 0; i < this.pointers.length; i++) {
if (indexOf(this.pointerIds, getPointerId(this.pointers[i])) === -1) {
this.pointers.splice(i, 1);
}
}
// delete interaction if it's not the only one
if (interactions.length > 1) {
interactions.splice(indexOf(interactions, this), 1);
}
},
inertiaFrame: function () {
var inertiaStatus = this.inertiaStatus,
options = this.target.options[this.prepared.name].inertia,
lambda = options.resistance,
t = new Date().getTime() / 1000 - inertiaStatus.t0;
if (t < inertiaStatus.te) {
var progress = 1 - (Math.exp(-lambda * t) - inertiaStatus.lambda_v0) / inertiaStatus.one_ve_v0;
if (inertiaStatus.modifiedXe === inertiaStatus.xe && inertiaStatus.modifiedYe === inertiaStatus.ye) {
inertiaStatus.sx = inertiaStatus.xe * progress;
inertiaStatus.sy = inertiaStatus.ye * progress;
}
else {
var quadPoint = getQuadraticCurvePoint(
0, 0,
inertiaStatus.xe, inertiaStatus.ye,
inertiaStatus.modifiedXe, inertiaStatus.modifiedYe,
progress);
inertiaStatus.sx = quadPoint.x;
inertiaStatus.sy = quadPoint.y;
}
this.pointerMove(inertiaStatus.startEvent, inertiaStatus.startEvent);
inertiaStatus.i = reqFrame(this.boundInertiaFrame);
}
else {
inertiaStatus.sx = inertiaStatus.modifiedXe;
inertiaStatus.sy = inertiaStatus.modifiedYe;
this.pointerMove(inertiaStatus.startEvent, inertiaStatus.startEvent);
inertiaStatus.active = false;
this.pointerEnd(inertiaStatus.startEvent, inertiaStatus.startEvent);
}
},
smoothEndFrame: function () {
var inertiaStatus = this.inertiaStatus,
t = new Date().getTime() - inertiaStatus.t0,
duration = this.target.options[this.prepared.name].inertia.smoothEndDuration;
if (t < duration) {
inertiaStatus.sx = easeOutQuad(t, 0, inertiaStatus.xe, duration);
inertiaStatus.sy = easeOutQuad(t, 0, inertiaStatus.ye, duration);
this.pointerMove(inertiaStatus.startEvent, inertiaStatus.startEvent);
inertiaStatus.i = reqFrame(this.boundSmoothEndFrame);
}
else {
inertiaStatus.sx = inertiaStatus.xe;
inertiaStatus.sy = inertiaStatus.ye;
this.pointerMove(inertiaStatus.startEvent, inertiaStatus.startEvent);
inertiaStatus.active = false;
inertiaStatus.smoothEnd = false;
this.pointerEnd(inertiaStatus.startEvent, inertiaStatus.startEvent);
}
},
addPointer: function (pointer) {
var id = getPointerId(pointer),
index = this.mouse? 0 : indexOf(this.pointerIds, id);
if (index === -1) {
index = this.pointerIds.length;
}
this.pointerIds[index] = id;
this.pointers[index] = pointer;
return index;
},
removePointer: function (pointer) {
var id = getPointerId(pointer),
index = this.mouse? 0 : indexOf(this.pointerIds, id);
if (index === -1) { return; }
if (!this.interacting()) {
this.pointers.splice(index, 1);
}
this.pointerIds .splice(index, 1);
this.downTargets.splice(index, 1);
this.downTimes .splice(index, 1);
this.holdTimers .splice(index, 1);
},
recordPointer: function (pointer) {
// Do not update pointers while inertia is active.
// The inertia start event should be this.pointers[0]
if (this.inertiaStatus.active) { return; }
var index = this.mouse? 0: indexOf(this.pointerIds, getPointerId(pointer));
if (index === -1) { return; }
this.pointers[index] = pointer;
},
collectEventTargets: function (pointer, event, eventTarget, eventType) {
var pointerIndex = this.mouse? 0 : indexOf(this.pointerIds, getPointerId(pointer));
// do not fire a tap event if the pointer was moved before being lifted
if (eventType === 'tap' && (this.pointerWasMoved
// or if the pointerup target is different to the pointerdown target
|| !(this.downTargets[pointerIndex] && this.downTargets[pointerIndex] === eventTarget))) {
return;
}
var targets = [],
elements = [],
element = eventTarget;
function collectSelectors (interactable, selector, context) {
var els = ie8MatchesSelector
? context.querySelectorAll(selector)
: undefined;
if (interactable._iEvents[eventType]
&& isElement(element)
&& inContext(interactable, element)
&& !testIgnore(interactable, element, eventTarget)
&& testAllow(interactable, element, eventTarget)
&& matchesSelector(element, selector, els)) {
targets.push(interactable);
elements.push(element);
}
}
while (element) {
if (interact.isSet(element) && interact(element)._iEvents[eventType]) {
targets.push(interact(element));
elements.push(element);
}
interactables.forEachSelector(collectSelectors);
element = parentElement(element);
}
// create the tap event even if there are no listeners so that
// doubletap can still be created and fired
if (targets.length || eventType === 'tap') {
this.firePointers(pointer, event, eventTarget, targets, elements, eventType);
}
},
firePointers: function (pointer, event, eventTarget, targets, elements, eventType) {
var pointerIndex = this.mouse? 0 : indexOf(getPointerId(pointer)),
pointerEvent = {},
i,
// for tap events
interval, createNewDoubleTap;
// if it's a doubletap then the event properties would have been
// copied from the tap event and provided as the pointer argument
if (eventType === 'doubletap') {
pointerEvent = pointer;
}
else {
extend(pointerEvent, event);
if (event !== pointer) {
extend(pointerEvent, pointer);
}
pointerEvent.preventDefault = preventOriginalDefault;
pointerEvent.stopPropagation = InteractEvent.prototype.stopPropagation;
pointerEvent.stopImmediatePropagation = InteractEvent.prototype.stopImmediatePropagation;
pointerEvent.interaction = this;
pointerEvent.timeStamp = new Date().getTime();
pointerEvent.originalEvent = event;
pointerEvent.type = eventType;
pointerEvent.pointerId = getPointerId(pointer);
pointerEvent.pointerType = this.mouse? 'mouse' : !supportsPointerEvent? 'touch'
: isString(pointer.pointerType)
? pointer.pointerType
: [,,'touch', 'pen', 'mouse'][pointer.pointerType];
}
if (eventType === 'tap') {
pointerEvent.dt = pointerEvent.timeStamp - this.downTimes[pointerIndex];
interval = pointerEvent.timeStamp - this.tapTime;
createNewDoubleTap = !!(this.prevTap && this.prevTap.type !== 'doubletap'
&& this.prevTap.target === pointerEvent.target
&& interval < 500);
pointerEvent.double = createNewDoubleTap;
this.tapTime = pointerEvent.timeStamp;
}
for (i = 0; i < targets.length; i++) {
pointerEvent.currentTarget = elements[i];
pointerEvent.interactable = targets[i];
targets[i].fire(pointerEvent);
if (pointerEvent.immediatePropagationStopped
||(pointerEvent.propagationStopped && elements[i + 1] !== pointerEvent.currentTarget)) {
break;
}
}
if (createNewDoubleTap) {
var doubleTap = {};
extend(doubleTap, pointerEvent);
doubleTap.dt = interval;
doubleTap.type = 'doubletap';
this.collectEventTargets(doubleTap, event, eventTarget, 'doubletap');
this.prevTap = doubleTap;
}
else if (eventType === 'tap') {
this.prevTap = pointerEvent;
}
},
validateSelector: function (pointer, matches, matchElements) {
for (var i = 0, len = matches.length; i < len; i++) {
var match = matches[i],
matchElement = matchElements[i],
action = validateAction(match.getAction(pointer, this, matchElement), match);
if (action && withinInteractionLimit(match, matchElement, action)) {
this.target = match;
this.element = matchElement;
return action;
}
}
},
setSnapping: function (pageCoords, status) {
var snap = this.target.options[this.prepared.name].snap,
targets = [],
target,
page,
i;
status = status || this.snapStatus;
if (status.useStatusXY) {
page = { x: status.x, y: status.y };
}
else {
var origin = getOriginXY(this.target, this.element);
page = extend({}, pageCoords);
page.x -= origin.x;
page.y -= origin.y;
}
status.realX = page.x;
status.realY = page.y;
page.x = page.x - this.inertiaStatus.resumeDx;
page.y = page.y - this.inertiaStatus.resumeDy;
var len = snap.targets? snap.targets.length : 0;
for (var relIndex = 0; relIndex < this.snapOffsets.length; relIndex++) {
var relative = {
x: page.x - this.snapOffsets[relIndex].x,
y: page.y - this.snapOffsets[relIndex].y
};
for (i = 0; i < len; i++) {
if (isFunction(snap.targets[i])) {
target = snap.targets[i](relative.x, relative.y, this);
}
else {
target = snap.targets[i];
}
if (!target) { continue; }
targets.push({
x: isNumber(target.x) ? (target.x + this.snapOffsets[relIndex].x) : relative.x,
y: isNumber(target.y) ? (target.y + this.snapOffsets[relIndex].y) : relative.y,
range: isNumber(target.range)? target.range: snap.range
});
}
}
var closest = {
target: null,
inRange: false,
distance: 0,
range: 0,
dx: 0,
dy: 0
};
for (i = 0, len = targets.length; i < len; i++) {
target = targets[i];
var range = target.range,
dx = target.x - page.x,
dy = target.y - page.y,
distance = hypot(dx, dy),
inRange = distance <= range;
// Infinite targets count as being out of range
// compared to non infinite ones that are in range
if (range === Infinity && closest.inRange && closest.range !== Infinity) {
inRange = false;
}
if (!closest.target || (inRange
// is the closest target in range?
? (closest.inRange && range !== Infinity
// the pointer is relatively deeper in this target
? distance / range < closest.distance / closest.range
// this target has Infinite range and the closest doesn't
: (range === Infinity && closest.range !== Infinity)
// OR this target is closer that the previous closest
|| distance < closest.distance)
// The other is not in range and the pointer is closer to this target
: (!closest.inRange && distance < closest.distance))) {
if (range === Infinity) {
inRange = true;
}
closest.target = target;
closest.distance = distance;
closest.range = range;
closest.inRange = inRange;
closest.dx = dx;
closest.dy = dy;
status.range = range;
}
}
var snapChanged;
if (closest.target) {
snapChanged = (status.snappedX !== closest.target.x || status.snappedY !== closest.target.y);
status.snappedX = closest.target.x;
status.snappedY = closest.target.y;
}
else {
snapChanged = true;
status.snappedX = NaN;
status.snappedY = NaN;
}
status.dx = closest.dx;
status.dy = closest.dy;
status.changed = (snapChanged || (closest.inRange && !status.locked));
status.locked = closest.inRange;
return status;
},
setRestriction: function (pageCoords, status) {
var target = this.target,
restrict = target && target.options[this.prepared.name].restrict,
restriction = restrict && restrict.restriction,
page;
if (!restriction) {
return status;
}
status = status || this.restrictStatus;
page = status.useStatusXY
? page = { x: status.x, y: status.y }
: page = extend({}, pageCoords);
if (status.snap && status.snap.locked) {
page.x += status.snap.dx || 0;
page.y += status.snap.dy || 0;
}
page.x -= this.inertiaStatus.resumeDx;
page.y -= this.inertiaStatus.resumeDy;
status.dx = 0;
status.dy = 0;
status.restricted = false;
var rect, restrictedX, restrictedY;
if (isString(restriction)) {
if (restriction === 'parent') {
restriction = parentElement(this.element);
}
else if (restriction === 'self') {
restriction = target.getRect(this.element);
}
else {
restriction = closest(this.element, restriction);
}
if (!restriction) { return status; }
}
if (isFunction(restriction)) {
restriction = restriction(page.x, page.y, this.element);
}
if (isElement(restriction)) {
restriction = getElementRect(restriction);
}
rect = restriction;
if (!restriction) {
restrictedX = page.x;
restrictedY = page.y;
}
// object is assumed to have
// x, y, width, height or
// left, top, right, bottom
else if ('x' in restriction && 'y' in restriction) {
restrictedX = Math.max(Math.min(rect.x + rect.width - this.restrictOffset.right , page.x), rect.x + this.restrictOffset.left);
restrictedY = Math.max(Math.min(rect.y + rect.height - this.restrictOffset.bottom, page.y), rect.y + this.restrictOffset.top );
}
else {
restrictedX = Math.max(Math.min(rect.right - this.restrictOffset.right , page.x), rect.left + this.restrictOffset.left);
restrictedY = Math.max(Math.min(rect.bottom - this.restrictOffset.bottom, page.y), rect.top + this.restrictOffset.top );
}
status.dx = restrictedX - page.x;
status.dy = restrictedY - page.y;
status.changed = status.restrictedX !== restrictedX || status.restrictedY !== restrictedY;
status.restricted = !!(status.dx || status.dy);
status.restrictedX = restrictedX;
status.restrictedY = restrictedY;
return status;
},
checkAndPreventDefault: function (event, interactable, element) {
if (!(interactable = interactable || this.target)) { return; }
var options = interactable.options,
prevent = options.preventDefault;
if (prevent === 'auto' && element && !/^input$|^textarea$/i.test(element.nodeName)) {
// do not preventDefault on pointerdown if the prepared action is a drag
// and dragging can only start from a certain direction - this allows
// a touch to pan the viewport if a drag isn't in the right direction
if (/down|start/i.test(event.type)
&& this.prepared.name === 'drag' && options.drag.axis !== 'xy') {
return;
}
// with manualStart, only preventDefault while interacting
if (options[this.prepared.name] && options[this.prepared.name].manualStart
&& !this.interacting()) {
return;
}
event.preventDefault();
return;
}
if (prevent === 'always') {
event.preventDefault();
return;
}
},
calcInertia: function (status) {
var inertiaOptions = this.target.options[this.prepared.name].inertia,
lambda = inertiaOptions.resistance,
inertiaDur = -Math.log(inertiaOptions.endSpeed / status.v0) / lambda;
status.x0 = this.prevEvent.pageX;
status.y0 = this.prevEvent.pageY;
status.t0 = status.startEvent.timeStamp / 1000;
status.sx = status.sy = 0;
status.modifiedXe = status.xe = (status.vx0 - inertiaDur) / lambda;
status.modifiedYe = status.ye = (status.vy0 - inertiaDur) / lambda;
status.te = inertiaDur;
status.lambda_v0 = lambda / status.v0;
status.one_ve_v0 = 1 - inertiaOptions.endSpeed / status.v0;
},
_updateEventTargets: function (target, currentTarget) {
this._eventTarget = target;
this._curEventTarget = currentTarget;
}
};
function getInteractionFromPointer (pointer, eventType, eventTarget) {
var i = 0, len = interactions.length,
mouseEvent = (/mouse/i.test(pointer.pointerType || eventType)
// MSPointerEvent.MSPOINTER_TYPE_MOUSE
|| pointer.pointerType === 4),
interaction;
var id = getPointerId(pointer);
// try to resume inertia with a new pointer
if (/down|start/i.test(eventType)) {
for (i = 0; i < len; i++) {
interaction = interactions[i];
var element = eventTarget;
if (interaction.inertiaStatus.active && interaction.target.options[interaction.prepared.name].inertia.allowResume
&& (interaction.mouse === mouseEvent)) {
while (element) {
// if the element is the interaction element
if (element === interaction.element) {
// update the interaction's pointer
if (interaction.pointers[0]) {
interaction.removePointer(interaction.pointers[0]);
}
interaction.addPointer(pointer);
return interaction;
}
element = parentElement(element);
}
}
}
}
// if it's a mouse interaction
if (mouseEvent || !(supportsTouch || supportsPointerEvent)) {
// find a mouse interaction that's not in inertia phase
for (i = 0; i < len; i++) {
if (interactions[i].mouse && !interactions[i].inertiaStatus.active) {
return interactions[i];
}
}
// find any interaction specifically for mouse.
// if the eventType is a mousedown, and inertia is active
// ignore the interaction
for (i = 0; i < len; i++) {
if (interactions[i].mouse && !(/down/.test(eventType) && interactions[i].inertiaStatus.active)) {
return interaction;
}
}
// create a new interaction for mouse
interaction = new Interaction();
interaction.mouse = true;
return interaction;
}
// get interaction that has this pointer
for (i = 0; i < len; i++) {
if (contains(interactions[i].pointerIds, id)) {
return interactions[i];
}
}
// at this stage, a pointerUp should not return an interaction
if (/up|end|out/i.test(eventType)) {
return null;
}
// get first idle interaction
for (i = 0; i < len; i++) {
interaction = interactions[i];
if ((!interaction.prepared.name || (interaction.target.options.gesture.enabled))
&& !interaction.interacting()
&& !(!mouseEvent && interaction.mouse)) {
interaction.addPointer(pointer);
return interaction;
}
}
return new Interaction();
}
function doOnInteractions (method) {
return (function (event) {
var interaction,
eventTarget = getActualElement(event.path
? event.path[0]
: event.target),
curEventTarget = getActualElement(event.currentTarget),
i;
if (supportsTouch && /touch/.test(event.type)) {
prevTouchTime = new Date().getTime();
for (i = 0; i < event.changedTouches.length; i++) {
var pointer = event.changedTouches[i];
interaction = getInteractionFromPointer(pointer, event.type, eventTarget);
if (!interaction) { continue; }
interaction._updateEventTargets(eventTarget, curEventTarget);
interaction[method](pointer, event, eventTarget, curEventTarget);
}
}
else {
if (!supportsPointerEvent && /mouse/.test(event.type)) {
// ignore mouse events while touch interactions are active
for (i = 0; i < interactions.length; i++) {
if (!interactions[i].mouse && interactions[i].pointerIsDown) {
return;
}
}
// try to ignore mouse events that are simulated by the browser
// after a touch event
if (new Date().getTime() - prevTouchTime < 500) {
return;
}
}
interaction = getInteractionFromPointer(event, event.type, eventTarget);
if (!interaction) { return; }
interaction._updateEventTargets(eventTarget, curEventTarget);
interaction[method](event, event, eventTarget, curEventTarget);
}
});
}
function InteractEvent (interaction, event, action, phase, element, related) {
var client,
page,
target = interaction.target,
snapStatus = interaction.snapStatus,
restrictStatus = interaction.restrictStatus,
pointers = interaction.pointers,
deltaSource = (target && target.options || defaultOptions).deltaSource,
sourceX = deltaSource + 'X',
sourceY = deltaSource + 'Y',
options = target? target.options: defaultOptions,
origin = getOriginXY(target, element),
starting = phase === 'start',
ending = phase === 'end',
coords = starting? interaction.startCoords : interaction.curCoords;
element = element || interaction.element;
page = extend({}, coords.page);
client = extend({}, coords.client);
page.x -= origin.x;
page.y -= origin.y;
client.x -= origin.x;
client.y -= origin.y;
var relativePoints = options[action].snap && options[action].snap.relativePoints ;
if (checkSnap(target, action) && !(starting && relativePoints && relativePoints.length)) {
this.snap = {
range : snapStatus.range,
locked : snapStatus.locked,
x : snapStatus.snappedX,
y : snapStatus.snappedY,
realX : snapStatus.realX,
realY : snapStatus.realY,
dx : snapStatus.dx,
dy : snapStatus.dy
};
if (snapStatus.locked) {
page.x += snapStatus.dx;
page.y += snapStatus.dy;
client.x += snapStatus.dx;
client.y += snapStatus.dy;
}
}
if (checkRestrict(target, action) && !(starting && options[action].restrict.elementRect) && restrictStatus.restricted) {
page.x += restrictStatus.dx;
page.y += restrictStatus.dy;
client.x += restrictStatus.dx;
client.y += restrictStatus.dy;
this.restrict = {
dx: restrictStatus.dx,
dy: restrictStatus.dy
};
}
this.pageX = page.x;
this.pageY = page.y;
this.clientX = client.x;
this.clientY = client.y;
this.x0 = interaction.startCoords.page.x;
this.y0 = interaction.startCoords.page.y;
this.clientX0 = interaction.startCoords.client.x;
this.clientY0 = interaction.startCoords.client.y;
this.ctrlKey = event.ctrlKey;
this.altKey = event.altKey;
this.shiftKey = event.shiftKey;
this.metaKey = event.metaKey;
this.button = event.button;
this.target = element;
this.t0 = interaction.downTimes[0];
this.type = action + (phase || '');
this.interaction = interaction;
this.interactable = target;
var inertiaStatus = interaction.inertiaStatus;
if (inertiaStatus.active) {
this.detail = 'inertia';
}
if (related) {
this.relatedTarget = related;
}
// end event dx, dy is difference between start and end points
if (ending) {
if (deltaSource === 'client') {
this.dx = client.x - interaction.startCoords.client.x;
this.dy = client.y - interaction.startCoords.client.y;
}
else {
this.dx = page.x - interaction.startCoords.page.x;
this.dy = page.y - interaction.startCoords.page.y;
}
}
else if (starting) {
this.dx = 0;
this.dy = 0;
}
// copy properties from previousmove if starting inertia
else if (phase === 'inertiastart') {
this.dx = interaction.prevEvent.dx;
this.dy = interaction.prevEvent.dy;
}
else {
if (deltaSource === 'client') {
this.dx = client.x - interaction.prevEvent.clientX;
this.dy = client.y - interaction.prevEvent.clientY;
}
else {
this.dx = page.x - interaction.prevEvent.pageX;
this.dy = page.y - interaction.prevEvent.pageY;
}
}
if (interaction.prevEvent && interaction.prevEvent.detail === 'inertia'
&& !inertiaStatus.active
&& options[action].inertia && options[action].inertia.zeroResumeDelta) {
inertiaStatus.resumeDx += this.dx;
inertiaStatus.resumeDy += this.dy;
this.dx = this.dy = 0;
}
if (action === 'resize' && interaction.resizeAxes) {
if (options.resize.square) {
if (interaction.resizeAxes === 'y') {
this.dx = this.dy;
}
else {
this.dy = this.dx;
}
this.axes = 'xy';
}
else {
this.axes = interaction.resizeAxes;
if (interaction.resizeAxes === 'x') {
this.dy = 0;
}
else if (interaction.resizeAxes === 'y') {
this.dx = 0;
}
}
}
else if (action === 'gesture') {
this.touches = [pointers[0], pointers[1]];
if (starting) {
this.distance = touchDistance(pointers, deltaSource);
this.box = touchBBox(pointers);
this.scale = 1;
this.ds = 0;
this.angle = touchAngle(pointers, undefined, deltaSource);
this.da = 0;
}
else if (ending || event instanceof InteractEvent) {
this.distance = interaction.prevEvent.distance;
this.box = interaction.prevEvent.box;
this.scale = interaction.prevEvent.scale;
this.ds = this.scale - 1;
this.angle = interaction.prevEvent.angle;
this.da = this.angle - interaction.gesture.startAngle;
}
else {
this.distance = touchDistance(pointers, deltaSource);
this.box = touchBBox(pointers);
this.scale = this.distance / interaction.gesture.startDistance;
this.angle = touchAngle(pointers, interaction.gesture.prevAngle, deltaSource);
this.ds = this.scale - interaction.gesture.prevScale;
this.da = this.angle - interaction.gesture.prevAngle;
}
}
if (starting) {
this.timeStamp = interaction.downTimes[0];
this.dt = 0;
this.duration = 0;
this.speed = 0;
this.velocityX = 0;
this.velocityY = 0;
}
else if (phase === 'inertiastart') {
this.timeStamp = interaction.prevEvent.timeStamp;
this.dt = interaction.prevEvent.dt;
this.duration = interaction.prevEvent.duration;
this.speed = interaction.prevEvent.speed;
this.velocityX = interaction.prevEvent.velocityX;
this.velocityY = interaction.prevEvent.velocityY;
}
else {
this.timeStamp = new Date().getTime();
this.dt = this.timeStamp - interaction.prevEvent.timeStamp;
this.duration = this.timeStamp - interaction.downTimes[0];
if (event instanceof InteractEvent) {
var dx = this[sourceX] - interaction.prevEvent[sourceX],
dy = this[sourceY] - interaction.prevEvent[sourceY],
dt = this.dt / 1000;
this.speed = hypot(dx, dy) / dt;
this.velocityX = dx / dt;
this.velocityY = dy / dt;
}
// if normal move or end event, use previous user event coords
else {
// speed and velocity in pixels per second
this.speed = interaction.pointerDelta[deltaSource].speed;
this.velocityX = interaction.pointerDelta[deltaSource].vx;
this.velocityY = interaction.pointerDelta[deltaSource].vy;
}
}
if ((ending || phase === 'inertiastart')
&& interaction.prevEvent.speed > 600 && this.timeStamp - interaction.prevEvent.timeStamp < 150) {
var angle = 180 * Math.atan2(interaction.prevEvent.velocityY, interaction.prevEvent.velocityX) / Math.PI,
overlap = 22.5;
if (angle < 0) {
angle += 360;
}
var left = 135 - overlap <= angle && angle < 225 + overlap,
up = 225 - overlap <= angle && angle < 315 + overlap,
right = !left && (315 - overlap <= angle || angle < 45 + overlap),
down = !up && 45 - overlap <= angle && angle < 135 + overlap;
this.swipe = {
up : up,
down : down,
left : left,
right: right,
angle: angle,
speed: interaction.prevEvent.speed,
velocity: {
x: interaction.prevEvent.velocityX,
y: interaction.prevEvent.velocityY
}
};
}
}
InteractEvent.prototype = {
preventDefault: blank,
stopImmediatePropagation: function () {
this.immediatePropagationStopped = this.propagationStopped = true;
},
stopPropagation: function () {
this.propagationStopped = true;
}
};
function preventOriginalDefault () {
this.originalEvent.preventDefault();
}
function getActionCursor (action) {
var cursor = '';
if (action.name === 'drag') {
cursor = actionCursors.drag;
}
if (action.name === 'resize') {
if (action.axis) {
cursor = actionCursors[action.name + action.axis];
}
else if (action.edges) {
var cursorKey = 'resize',
edgeNames = ['top', 'bottom', 'left', 'right'];
for (var i = 0; i < 4; i++) {
if (action.edges[edgeNames[i]]) {
cursorKey += edgeNames[i];
}
}
cursor = actionCursors[cursorKey];
}
}
return cursor;
}
function checkResizeEdge (name, value, page, element, interactableElement, rect) {
// false, '', undefined, null
if (!value) { return false; }
// true value, use pointer coords and element rect
if (value === true) {
// if dimensions are negative, "switch" edges
var width = isNumber(rect.width)? rect.width : rect.right - rect.left,
height = isNumber(rect.height)? rect.height : rect.bottom - rect.top;
if (width < 0) {
if (name === 'left' ) { name = 'right'; }
else if (name === 'right') { name = 'left' ; }
}
if (height < 0) {
if (name === 'top' ) { name = 'bottom'; }
else if (name === 'bottom') { name = 'top' ; }
}
if (name === 'left' ) { return page.x < ((width >= 0? rect.left: rect.right ) + margin); }
if (name === 'top' ) { return page.y < ((height >= 0? rect.top : rect.bottom) + margin); }
if (name === 'right' ) { return page.x > ((width >= 0? rect.right : rect.left) - margin); }
if (name === 'bottom') { return page.y > ((height >= 0? rect.bottom: rect.top ) - margin); }
}
// the remaining checks require an element
if (!isElement(element)) { return false; }
return isElement(value)
// the value is an element to use as a resize handle
? value === element
// otherwise check if element matches value as selector
: matchesUpTo(element, value, interactableElement);
}
function defaultActionChecker (pointer, interaction, element) {
var rect = this.getRect(element),
shouldResize = false,
action = null,
resizeAxes = null,
resizeEdges,
page = extend({}, interaction.curCoords.page),
options = this.options;
if (!rect) { return null; }
if (actionIsEnabled.resize && options.resize.enabled) {
var resizeOptions = options.resize;
resizeEdges = {
left: false, right: false, top: false, bottom: false
};
// if using resize.edges
if (isObject(resizeOptions.edges)) {
for (var edge in resizeEdges) {
resizeEdges[edge] = checkResizeEdge(edge,
resizeOptions.edges[edge],
page,
interaction._eventTarget,
element,
rect);
}
resizeEdges.left = resizeEdges.left && !resizeEdges.right;
resizeEdges.top = resizeEdges.top && !resizeEdges.bottom;
shouldResize = resizeEdges.left || resizeEdges.right || resizeEdges.top || resizeEdges.bottom;
}
else {
var right = options.resize.axis !== 'y' && page.x > (rect.right - margin),
bottom = options.resize.axis !== 'x' && page.y > (rect.bottom - margin);
shouldResize = right || bottom;
resizeAxes = (right? 'x' : '') + (bottom? 'y' : '');
}
}
action = shouldResize
? 'resize'
: actionIsEnabled.drag && options.drag.enabled
? 'drag'
: null;
if (actionIsEnabled.gesture
&& interaction.pointerIds.length >=2
&& !(interaction.dragging || interaction.resizing)) {
action = 'gesture';
}
if (action) {
return {
name: action,
axis: resizeAxes,
edges: resizeEdges
};
}
return null;
}
// Check if action is enabled globally and the current target supports it
// If so, return the validated action. Otherwise, return null
function validateAction (action, interactable) {
if (!isObject(action)) { return null; }
var actionName = action.name,
options = interactable.options;
if (( (actionName === 'resize' && options.resize.enabled )
|| (actionName === 'drag' && options.drag.enabled )
|| (actionName === 'gesture' && options.gesture.enabled))
&& actionIsEnabled[actionName]) {
if (actionName === 'resize' || actionName === 'resizeyx') {
actionName = 'resizexy';
}
return action;
}
return null;
}
var listeners = {},
interactionListeners = [
'dragStart', 'dragMove', 'resizeStart', 'resizeMove', 'gestureStart', 'gestureMove',
'pointerOver', 'pointerOut', 'pointerHover', 'selectorDown',
'pointerDown', 'pointerMove', 'pointerUp', 'pointerCancel', 'pointerEnd',
'addPointer', 'removePointer', 'recordPointer',
];
for (var i = 0, len = interactionListeners.length; i < len; i++) {
var name = interactionListeners[i];
listeners[name] = doOnInteractions(name);
}
// bound to the interactable context when a DOM event
// listener is added to a selector interactable
function delegateListener (event, useCapture) {
var fakeEvent = {},
delegated = delegatedEvents[event.type],
eventTarget = getActualElement(event.path
? event.path[0]
: event.target),
element = eventTarget;
useCapture = useCapture? true: false;
// duplicate the event so that currentTarget can be changed
for (var prop in event) {
fakeEvent[prop] = event[prop];
}
fakeEvent.originalEvent = event;
fakeEvent.preventDefault = preventOriginalDefault;
// climb up document tree looking for selector matches
while (isElement(element)) {
for (var i = 0; i < delegated.selectors.length; i++) {
var selector = delegated.selectors[i],
context = delegated.contexts[i];
if (matchesSelector(element, selector)
&& nodeContains(context, eventTarget)
&& nodeContains(context, element)) {
var listeners = delegated.listeners[i];
fakeEvent.currentTarget = element;
for (var j = 0; j < listeners.length; j++) {
if (listeners[j][1] === useCapture) {
listeners[j][0](fakeEvent);
}
}
}
}
element = parentElement(element);
}
}
function delegateUseCapture (event) {
return delegateListener.call(this, event, true);
}
interactables.indexOfElement = function indexOfElement (element, context) {
context = context || document;
for (var i = 0; i < this.length; i++) {
var interactable = this[i];
if ((interactable.selector === element
&& (interactable._context === context))
|| (!interactable.selector && interactable._element === element)) {
return i;
}
}
return -1;
};
interactables.get = function interactableGet (element, options) {
return this[this.indexOfElement(element, options && options.context)];
};
interactables.forEachSelector = function (callback) {
for (var i = 0; i < this.length; i++) {
var interactable = this[i];
if (!interactable.selector) {
continue;
}
var ret = callback(interactable, interactable.selector, interactable._context, i, this);
if (ret !== undefined) {
return ret;
}
}
};
/*\
* interact
[ method ]
*
* The methods of this variable can be used to set elements as
* interactables and also to change various default settings.
*
* Calling it as a function and passing an element or a valid CSS selector
* string returns an Interactable object which has various methods to
* configure it.
*
- element (Element | string) The HTML or SVG Element to interact with or CSS selector
= (object) An @Interactable
*
> Usage
| interact(document.getElementById('draggable')).draggable(true);
|
| var rectables = interact('rect');
| rectables
| .gesturable(true)
| .on('gesturemove', function (event) {
| // something cool...
| })
| .autoScroll(true);
\*/
function interact (element, options) {
return interactables.get(element, options) || new Interactable(element, options);
}
/*\
* Interactable
[ property ]
**
* Object type returned by @interact
\*/
function Interactable (element, options) {
this._element = element;
this._iEvents = this._iEvents || {};
var _window;
if (trySelector(element)) {
this.selector = element;
var context = options && options.context;
_window = context? getWindow(context) : window;
if (context && (_window.Node
? context instanceof _window.Node
: (isElement(context) || context === _window.document))) {
this._context = context;
}
}
else {
_window = getWindow(element);
if (isElement(element, _window)) {
if (PointerEvent) {
events.add(this._element, pEventTypes.down, listeners.pointerDown );
events.add(this._element, pEventTypes.move, listeners.pointerHover);
}
else {
events.add(this._element, 'mousedown' , listeners.pointerDown );
events.add(this._element, 'mousemove' , listeners.pointerHover);
events.add(this._element, 'touchstart', listeners.pointerDown );
events.add(this._element, 'touchmove' , listeners.pointerHover);
}
}
}
this._doc = _window.document;
if (!contains(documents, this._doc)) {
listenToDocument(this._doc);
}
interactables.push(this);
this.set(options);
}
Interactable.prototype = {
setOnEvents: function (action, phases) {
if (action === 'drop') {
if (isFunction(phases.ondrop) ) { this.ondrop = phases.ondrop ; }
if (isFunction(phases.ondropactivate) ) { this.ondropactivate = phases.ondropactivate ; }
if (isFunction(phases.ondropdeactivate)) { this.ondropdeactivate = phases.ondropdeactivate; }
if (isFunction(phases.ondragenter) ) { this.ondragenter = phases.ondragenter ; }
if (isFunction(phases.ondragleave) ) { this.ondragleave = phases.ondragleave ; }
if (isFunction(phases.ondropmove) ) { this.ondropmove = phases.ondropmove ; }
}
else {
action = 'on' + action;
if (isFunction(phases.onstart) ) { this[action + 'start' ] = phases.onstart ; }
if (isFunction(phases.onmove) ) { this[action + 'move' ] = phases.onmove ; }
if (isFunction(phases.onend) ) { this[action + 'end' ] = phases.onend ; }
if (isFunction(phases.oninertiastart)) { this[action + 'inertiastart' ] = phases.oninertiastart ; }
}
return this;
},
/*\
* Interactable.draggable
[ method ]
*
* Gets or sets whether drag actions can be performed on the
* Interactable
*
= (boolean) Indicates if this can be the target of drag events
| var isDraggable = interact('ul li').draggable();
* or
- options (boolean | object) #optional true/false or An object with event listeners to be fired on drag events (object makes the Interactable draggable)
= (object) This Interactable
| interact(element).draggable({
| onstart: function (event) {},
| onmove : function (event) {},
| onend : function (event) {},
|
| // the axis in which the first movement must be
| // for the drag sequence to start
| // 'xy' by default - any direction
| axis: 'x' || 'y' || 'xy',
|
| // max number of drags that can happen concurrently
| // with elements of this Interactable. Infinity by default
| max: Infinity,
|
| // max number of drags that can target the same element+Interactable
| // 1 by default
| maxPerElement: 2
| });
\*/
draggable: function (options) {
if (isObject(options)) {
this.options.drag.enabled = options.enabled === false? false: true;
this.setPerAction('drag', options);
this.setOnEvents('drag', options);
if (/^x$|^y$|^xy$/.test(options.axis)) {
this.options.drag.axis = options.axis;
}
else if (options.axis === null) {
delete this.options.drag.axis;
}
return this;
}
if (isBool(options)) {
this.options.drag.enabled = options;
return this;
}
return this.options.drag;
},
setPerAction: function (action, options) {
// for all the default per-action options
for (var option in options) {
// if this option exists for this action
if (option in defaultOptions[action]) {
// if the option in the options arg is an object value
if (isObject(options[option])) {
// duplicate the object
this.options[action][option] = extend(this.options[action][option] || {}, options[option]);
if (isObject(defaultOptions.perAction[option]) && 'enabled' in defaultOptions.perAction[option]) {
this.options[action][option].enabled = options[option].enabled === false? false : true;
}
}
else if (isBool(options[option]) && isObject(defaultOptions.perAction[option])) {
this.options[action][option].enabled = options[option];
}
else if (options[option] !== undefined) {
// or if it's not undefined, do a plain assignment
this.options[action][option] = options[option];
}
}
}
},
/*\
* Interactable.dropzone
[ method ]
*
* Returns or sets whether elements can be dropped onto this
* Interactable to trigger drop events
*
* Dropzones can receive the following events:
* - `dropactivate` and `dropdeactivate` when an acceptable drag starts and ends
* - `dragenter` and `dragleave` when a draggable enters and leaves the dropzone
* - `dragmove` when a draggable that has entered the dropzone is moved
* - `drop` when a draggable is dropped into this dropzone
*
* Use the `accept` option to allow only elements that match the given CSS selector or element.
*
* Use the `overlap` option to set how drops are checked for. The allowed values are:
* - `'pointer'`, the pointer must be over the dropzone (default)
* - `'center'`, the draggable element's center must be over the dropzone
* - a number from 0-1 which is the `(intersection area) / (draggable area)`.
* e.g. `0.5` for drop to happen when half of the area of the
* draggable is over the dropzone
*
- options (boolean | object | null) #optional The new value to be set.
| interact('.drop').dropzone({
| accept: '.can-drop' || document.getElementById('single-drop'),
| overlap: 'pointer' || 'center' || zeroToOne
| }
= (boolean | object) The current setting or this Interactable
\*/
dropzone: function (options) {
if (isObject(options)) {
this.options.drop.enabled = options.enabled === false? false: true;
this.setOnEvents('drop', options);
this.accept(options.accept);
if (/^(pointer|center)$/.test(options.overlap)) {
this.options.drop.overlap = options.overlap;
}
else if (isNumber(options.overlap)) {
this.options.drop.overlap = Math.max(Math.min(1, options.overlap), 0);
}
return this;
}
if (isBool(options)) {
this.options.drop.enabled = options;
return this;
}
return this.options.drop;
},
dropCheck: function (pointer, draggable, draggableElement, dropElement, rect) {
var dropped = false;
// if the dropzone has no rect (eg. display: none)
// call the custom dropChecker or just return false
if (!(rect = rect || this.getRect(dropElement))) {
return (this.options.dropChecker
? this.options.dropChecker(pointer, dropped, this, dropElement, draggable, draggableElement)
: false);
}
var dropOverlap = this.options.drop.overlap;
if (dropOverlap === 'pointer') {
var page = getPageXY(pointer),
origin = getOriginXY(draggable, draggableElement),
horizontal,
vertical;
page.x += origin.x;
page.y += origin.y;
horizontal = (page.x > rect.left) && (page.x < rect.right);
vertical = (page.y > rect.top ) && (page.y < rect.bottom);
dropped = horizontal && vertical;
}
var dragRect = draggable.getRect(draggableElement);
if (dropOverlap === 'center') {
var cx = dragRect.left + dragRect.width / 2,
cy = dragRect.top + dragRect.height / 2;
dropped = cx >= rect.left && cx <= rect.right && cy >= rect.top && cy <= rect.bottom;
}
if (isNumber(dropOverlap)) {
var overlapArea = (Math.max(0, Math.min(rect.right , dragRect.right ) - Math.max(rect.left, dragRect.left))
* Math.max(0, Math.min(rect.bottom, dragRect.bottom) - Math.max(rect.top , dragRect.top ))),
overlapRatio = overlapArea / (dragRect.width * dragRect.height);
dropped = overlapRatio >= dropOverlap;
}
if (this.options.dropChecker) {
dropped = this.options.dropChecker(pointer, dropped, this, dropElement, draggable, draggableElement);
}
return dropped;
},
/*\
* Interactable.dropChecker
[ method ]
*
* Gets or sets the function used to check if a dragged element is
* over this Interactable. See @Interactable.dropCheck.
*
- checker (function) #optional
* The checker is a function which takes a mouseUp/touchEnd event as a
* parameter and returns true or false to indicate if the the current
* draggable can be dropped into this Interactable
*
- checker (function) The function that will be called when checking for a drop
* The checker function takes the following arguments:
*
- pointer (MouseEvent | PointerEvent | Touch) The pointer/event that ends a drag
- dropped (boolean) The value from the default drop check
- dropzone (Interactable) The dropzone interactable
- dropElement (Element) The dropzone element
- draggable (Interactable) The Interactable being dragged
- draggableElement (Element) The actual element that's being dragged
*
= (Function | Interactable) The checker function or this Interactable
\*/
dropChecker: function (checker) {
if (isFunction(checker)) {
this.options.dropChecker = checker;
return this;
}
if (checker === null) {
delete this.options.getRect;
return this;
}
return this.options.dropChecker;
},
/*\
* Interactable.accept
[ method ]
*
* Deprecated. add an `accept` property to the options object passed to
* @Interactable.dropzone instead.
*
* Gets or sets the Element or CSS selector match that this
* Interactable accepts if it is a dropzone.
*
- newValue (Element | string | null) #optional
* If it is an Element, then only that element can be dropped into this dropzone.
* If it is a string, the element being dragged must match it as a selector.
* If it is null, the accept options is cleared - it accepts any element.
*
= (string | Element | null | Interactable) The current accept option if given `undefined` or this Interactable
\*/
accept: function (newValue) {
if (isElement(newValue)) {
this.options.drop.accept = newValue;
return this;
}
// test if it is a valid CSS selector
if (trySelector(newValue)) {
this.options.drop.accept = newValue;
return this;
}
if (newValue === null) {
delete this.options.drop.accept;
return this;
}
return this.options.drop.accept;
},
/*\
* Interactable.resizable
[ method ]
*
* Gets or sets whether resize actions can be performed on the
* Interactable
*
= (boolean) Indicates if this can be the target of resize elements
| var isResizeable = interact('input[type=text]').resizable();
* or
- options (boolean | object) #optional true/false or An object with event listeners to be fired on resize events (object makes the Interactable resizable)
= (object) This Interactable
| interact(element).resizable({
| onstart: function (event) {},
| onmove : function (event) {},
| onend : function (event) {},
|
| edges: {
| top : true, // Use pointer coords to check for resize.
| left : false, // Disable resizing from left edge.
| bottom: '.resize-s',// Resize if pointer target matches selector
| right : handleEl // Resize if pointer target is the given Element
| },
|
| // a value of 'none' will limit the resize rect to a minimum of 0x0
| // 'negate' will allow the rect to have negative width/height
| // 'reposition' will keep the width/height positive by swapping
| // the top and bottom edges and/or swapping the left and right edges
| invert: 'none' || 'negate' || 'reposition'
|
| // limit multiple resizes.
| // See the explanation in the @Interactable.draggable example
| max: Infinity,
| maxPerElement: 1,
| });
\*/
resizable: function (options) {
if (isObject(options)) {
this.options.resize.enabled = options.enabled === false? false: true;
this.setPerAction('resize', options);
this.setOnEvents('resize', options);
if (/^x$|^y$|^xy$/.test(options.axis)) {
this.options.resize.axis = options.axis;
}
else if (options.axis === null) {
this.options.resize.axis = defaultOptions.resize.axis;
}
if (isBool(options.square)) {
this.options.resize.square = options.square;
}
return this;
}
if (isBool(options)) {
this.options.resize.enabled = options;
return this;
}
return this.options.resize;
},
/*\
* Interactable.squareResize
[ method ]
*
* Deprecated. Add a `square: true || false` property to @Interactable.resizable instead
*
* Gets or sets whether resizing is forced 1:1 aspect
*
= (boolean) Current setting
*
* or
*
- newValue (boolean) #optional
= (object) this Interactable
\*/
squareResize: function (newValue) {
if (isBool(newValue)) {
this.options.resize.square = newValue;
return this;
}
if (newValue === null) {
delete this.options.resize.square;
return this;
}
return this.options.resize.square;
},
/*\
* Interactable.gesturable
[ method ]
*
* Gets or sets whether multitouch gestures can be performed on the
* Interactable's element
*
= (boolean) Indicates if this can be the target of gesture events
| var isGestureable = interact(element).gesturable();
* or
- options (boolean | object) #optional true/false or An object with event listeners to be fired on gesture events (makes the Interactable gesturable)
= (object) this Interactable
| interact(element).gesturable({
| onstart: function (event) {},
| onmove : function (event) {},
| onend : function (event) {},
|
| // limit multiple gestures.
| // See the explanation in @Interactable.draggable example
| max: Infinity,
| maxPerElement: 1,
| });
\*/
gesturable: function (options) {
if (isObject(options)) {
this.options.gesture.enabled = options.enabled === false? false: true;
this.setPerAction('gesture', options);
this.setOnEvents('gesture', options);
return this;
}
if (isBool(options)) {
this.options.gesture.enabled = options;
return this;
}
return this.options.gesture;
},
/*\
* Interactable.autoScroll
[ method ]
**
* Deprecated. Add an `autoscroll` property to the options object
* passed to @Interactable.draggable or @Interactable.resizable instead.
*
* Returns or sets whether dragging and resizing near the edges of the
* window/container trigger autoScroll for this Interactable
*
= (object) Object with autoScroll properties
*
* or
*
- options (object | boolean) #optional
* options can be:
* - an object with margin, distance and interval properties,
* - true or false to enable or disable autoScroll or
= (Interactable) this Interactable
\*/
autoScroll: function (options) {
if (isObject(options)) {
options = extend({ actions: ['drag', 'resize']}, options);
}
else if (isBool(options)) {
options = { actions: ['drag', 'resize'], enabled: options };
}
return this.setOptions('autoScroll', options);
},
/*\
* Interactable.snap
[ method ]
**
* Deprecated. Add a `snap` property to the options object passed
* to @Interactable.draggable or @Interactable.resizable instead.
*
* Returns or sets if and how action coordinates are snapped. By
* default, snapping is relative to the pointer coordinates. You can
* change this by setting the
* [`elementOrigin`](https://github.com/taye/interact.js/pull/72).
**
= (boolean | object) `false` if snap is disabled; object with snap properties if snap is enabled
**
* or
**
- options (object | boolean | null) #optional
= (Interactable) this Interactable
> Usage
| interact(document.querySelector('#thing')).snap({
| targets: [
| // snap to this specific point
| {
| x: 100,
| y: 100,
| range: 25
| },
| // give this function the x and y page coords and snap to the object returned
| function (x, y) {
| return {
| x: x,
| y: (75 + 50 * Math.sin(x * 0.04)),
| range: 40
| };
| },
| // create a function that snaps to a grid
| interact.createSnapGrid({
| x: 50,
| y: 50,
| range: 10, // optional
| offset: { x: 5, y: 10 } // optional
| })
| ],
| // do not snap during normal movement.
| // Instead, trigger only one snapped move event
| // immediately before the end event.
| endOnly: true,
|
| relativePoints: [
| { x: 0, y: 0 }, // snap relative to the top left of the element
| { x: 1, y: 1 }, // and also to the bottom right
| ],
|
| // offset the snap target coordinates
| // can be an object with x/y or 'startCoords'
| offset: { x: 50, y: 50 }
| }
| });
\*/
snap: function (options) {
var ret = this.setOptions('snap', options);
if (ret === this) { return this; }
return ret.drag;
},
setOptions: function (option, options) {
var actions = options && isArray(options.actions)
? options.actions
: ['drag'];
var i;
if (isObject(options) || isBool(options)) {
for (i = 0; i < actions.length; i++) {
var action = /resize/.test(actions[i])? 'resize' : actions[i];
if (!isObject(this.options[action])) { continue; }
var thisOption = this.options[action][option];
if (isObject(options)) {
extend(thisOption, options);
thisOption.enabled = options.enabled === false? false: true;
if (option === 'snap') {
if (thisOption.mode === 'grid') {
thisOption.targets = [
interact.createSnapGrid(extend({
offset: thisOption.gridOffset || { x: 0, y: 0 }
}, thisOption.grid || {}))
];
}
else if (thisOption.mode === 'anchor') {
thisOption.targets = thisOption.anchors;
}
else if (thisOption.mode === 'path') {
thisOption.targets = thisOption.paths;
}
if ('elementOrigin' in options) {
thisOption.relativePoints = [options.elementOrigin];
}
}
}
else if (isBool(options)) {
thisOption.enabled = options;
}
}
return this;
}
var ret = {},
allActions = ['drag', 'resize', 'gesture'];
for (i = 0; i < allActions.length; i++) {
if (option in defaultOptions[allActions[i]]) {
ret[allActions[i]] = this.options[allActions[i]][option];
}
}
return ret;
},
/*\
* Interactable.inertia
[ method ]
**
* Deprecated. Add an `inertia` property to the options object passed
* to @Interactable.draggable or @Interactable.resizable instead.
*
* Returns or sets if and how events continue to run after the pointer is released
**
= (boolean | object) `false` if inertia is disabled; `object` with inertia properties if inertia is enabled
**
* or
**
- options (object | boolean | null) #optional
= (Interactable) this Interactable
> Usage
| // enable and use default settings
| interact(element).inertia(true);
|
| // enable and use custom settings
| interact(element).inertia({
| // value greater than 0
| // high values slow the object down more quickly
| resistance : 16,
|
| // the minimum launch speed (pixels per second) that results in inertia start
| minSpeed : 200,
|
| // inertia will stop when the object slows down to this speed
| endSpeed : 20,
|
| // boolean; should actions be resumed when the pointer goes down during inertia
| allowResume : true,
|
| // boolean; should the jump when resuming from inertia be ignored in event.dx/dy
| zeroResumeDelta: false,
|
| // if snap/restrict are set to be endOnly and inertia is enabled, releasing
| // the pointer without triggering inertia will animate from the release
| // point to the snaped/restricted point in the given amount of time (ms)
| smoothEndDuration: 300,
|
| // an array of action types that can have inertia (no gesture)
| actions : ['drag', 'resize']
| });
|
| // reset custom settings and use all defaults
| interact(element).inertia(null);
\*/
inertia: function (options) {
var ret = this.setOptions('inertia', options);
if (ret === this) { return this; }
return ret.drag;
},
getAction: function (pointer, interaction, element) {
var action = this.defaultActionChecker(pointer, interaction, element);
if (this.options.actionChecker) {
return this.options.actionChecker(pointer, action, this, element, interaction);
}
return action;
},
defaultActionChecker: defaultActionChecker,
/*\
* Interactable.actionChecker
[ method ]
*
* Gets or sets the function used to check action to be performed on
* pointerDown
*
- checker (function | null) #optional A function which takes a pointer event, defaultAction string, interactable, element and interaction as parameters and returns an object with name property 'drag' 'resize' or 'gesture' and optionally an `edges` object with boolean 'top', 'left', 'bottom' and right props.
= (Function | Interactable) The checker function or this Interactable
*
| interact('.resize-horiz').actionChecker(function (defaultAction, interactable) {
| return {
| // resize from the top and right edges
| name: 'resize',
| edges: { top: true, right: true }
| };
| });
\*/
actionChecker: function (checker) {
if (isFunction(checker)) {
this.options.actionChecker = checker;
return this;
}
if (checker === null) {
delete this.options.actionChecker;
return this;
}
return this.options.actionChecker;
},
/*\
* Interactable.getRect
[ method ]
*
* The default function to get an Interactables bounding rect. Can be
* overridden using @Interactable.rectChecker.
*
- element (Element) #optional The element to measure.
= (object) The object's bounding rectangle.
o {
o top : 0,
o left : 0,
o bottom: 0,
o right : 0,
o width : 0,
o height: 0
o }
\*/
getRect: function rectCheck (element) {
element = element || this._element;
if (this.selector && !(isElement(element))) {
element = this._context.querySelector(this.selector);
}
return getElementRect(element);
},
/*\
* Interactable.rectChecker
[ method ]
*
* Returns or sets the function used to calculate the interactable's
* element's rectangle
*
- checker (function) #optional A function which returns this Interactable's bounding rectangle. See @Interactable.getRect
= (function | object) The checker function or this Interactable
\*/
rectChecker: function (checker) {
if (isFunction(checker)) {
this.getRect = checker;
return this;
}
if (checker === null) {
delete this.options.getRect;
return this;
}
return this.getRect;
},
/*\
* Interactable.styleCursor
[ method ]
*
* Returns or sets whether the action that would be performed when the
* mouse on the element are checked on `mousemove` so that the cursor
* may be styled appropriately
*
- newValue (boolean) #optional
= (boolean | Interactable) The current setting or this Interactable
\*/
styleCursor: function (newValue) {
if (isBool(newValue)) {
this.options.styleCursor = newValue;
return this;
}
if (newValue === null) {
delete this.options.styleCursor;
return this;
}
return this.options.styleCursor;
},
/*\
* Interactable.preventDefault
[ method ]
*
* Returns or sets whether to prevent the browser's default behaviour
* in response to pointer events. Can be set to:
* - `'always'` to always prevent
* - `'never'` to never prevent
* - `'auto'` to let interact.js try to determine what would be best
*
- newValue (string) #optional `true`, `false` or `'auto'`
= (string | Interactable) The current setting or this Interactable
\*/
preventDefault: function (newValue) {
if (/^(always|never|auto)$/.test(newValue)) {
this.options.preventDefault = newValue;
return this;
}
if (isBool(newValue)) {
this.options.preventDefault = newValue? 'always' : 'never';
return this;
}
return this.options.preventDefault;
},
/*\
* Interactable.origin
[ method ]
*
* Gets or sets the origin of the Interactable's element. The x and y
* of the origin will be subtracted from action event coordinates.
*
- origin (object | string) #optional An object eg. { x: 0, y: 0 } or string 'parent', 'self' or any CSS selector
* OR
- origin (Element) #optional An HTML or SVG Element whose rect will be used
**
= (object) The current origin or this Interactable
\*/
origin: function (newValue) {
if (trySelector(newValue)) {
this.options.origin = newValue;
return this;
}
else if (isObject(newValue)) {
this.options.origin = newValue;
return this;
}
return this.options.origin;
},
/*\
* Interactable.deltaSource
[ method ]
*
* Returns or sets the mouse coordinate types used to calculate the
* movement of the pointer.
*
- newValue (string) #optional Use 'client' if you will be scrolling while interacting; Use 'page' if you want autoScroll to work
= (string | object) The current deltaSource or this Interactable
\*/
deltaSource: function (newValue) {
if (newValue === 'page' || newValue === 'client') {
this.options.deltaSource = newValue;
return this;
}
return this.options.deltaSource;
},
/*\
* Interactable.restrict
[ method ]
**
* Deprecated. Add a `restrict` property to the options object passed to
* @Interactable.draggable, @Interactable.resizable or @Interactable.gesturable instead.
*
* Returns or sets the rectangles within which actions on this
* interactable (after snap calculations) are restricted. By default,
* restricting is relative to the pointer coordinates. You can change
* this by setting the
* [`elementRect`](https://github.com/taye/interact.js/pull/72).
**
- options (object) #optional an object with keys drag, resize, and/or gesture whose values are rects, Elements, CSS selectors, or 'parent' or 'self'
= (object) The current restrictions object or this Interactable
**
| interact(element).restrict({
| // the rect will be `interact.getElementRect(element.parentNode)`
| drag: element.parentNode,
|
| // x and y are relative to the the interactable's origin
| resize: { x: 100, y: 100, width: 200, height: 200 }
| })
|
| interact('.draggable').restrict({
| // the rect will be the selected element's parent
| drag: 'parent',
|
| // do not restrict during normal movement.
| // Instead, trigger only one restricted move event
| // immediately before the end event.
| endOnly: true,
|
| // https://github.com/taye/interact.js/pull/72#issue-41813493
| elementRect: { top: 0, left: 0, bottom: 1, right: 1 }
| });
\*/
restrict: function (options) {
if (!isObject(options)) {
return this.setOptions('restrict', options);
}
var actions = ['drag', 'resize', 'gesture'],
ret;
for (var i = 0; i < actions.length; i++) {
var action = actions[i];
if (action in options) {
var perAction = extend({
actions: [action],
restriction: options[action]
}, options);
ret = this.setOptions('restrict', perAction);
}
}
return ret;
},
/*\
* Interactable.context
[ method ]
*
* Gets the selector context Node of the Interactable. The default is `window.document`.
*
= (Node) The context Node of this Interactable
**
\*/
context: function () {
return this._context;
},
_context: document,
/*\
* Interactable.ignoreFrom
[ method ]
*
* If the target of the `mousedown`, `pointerdown` or `touchstart`
* event or any of it's parents match the given CSS selector or
* Element, no drag/resize/gesture is started.
*
- newValue (string | Element | null) #optional a CSS selector string, an Element or `null` to not ignore any elements
= (string | Element | object) The current ignoreFrom value or this Interactable
**
| interact(element, { ignoreFrom: document.getElementById('no-action') });
| // or
| interact(element).ignoreFrom('input, textarea, a');
\*/
ignoreFrom: function (newValue) {
if (trySelector(newValue)) { // CSS selector to match event.target
this.options.ignoreFrom = newValue;
return this;
}
if (isElement(newValue)) { // specific element
this.options.ignoreFrom = newValue;
return this;
}
return this.options.ignoreFrom;
},
/*\
* Interactable.allowFrom
[ method ]
*
* A drag/resize/gesture is started only If the target of the
* `mousedown`, `pointerdown` or `touchstart` event or any of it's
* parents match the given CSS selector or Element.
*
- newValue (string | Element | null) #optional a CSS selector string, an Element or `null` to allow from any element
= (string | Element | object) The current allowFrom value or this Interactable
**
| interact(element, { allowFrom: document.getElementById('drag-handle') });
| // or
| interact(element).allowFrom('.handle');
\*/
allowFrom: function (newValue) {
if (trySelector(newValue)) { // CSS selector to match event.target
this.options.allowFrom = newValue;
return this;
}
if (isElement(newValue)) { // specific element
this.options.allowFrom = newValue;
return this;
}
return this.options.allowFrom;
},
/*\
* Interactable.element
[ method ]
*
* If this is not a selector Interactable, it returns the element this
* interactable represents
*
= (Element) HTML / SVG Element
\*/
element: function () {
return this._element;
},
/*\
* Interactable.fire
[ method ]
*
* Calls listeners for the given InteractEvent type bound globally
* and directly to this Interactable
*
- iEvent (InteractEvent) The InteractEvent object to be fired on this Interactable
= (Interactable) this Interactable
\*/
fire: function (iEvent) {
if (!(iEvent && iEvent.type) || !contains(eventTypes, iEvent.type)) {
return this;
}
var listeners,
i,
len,
onEvent = 'on' + iEvent.type,
funcName = '';
// Interactable#on() listeners
if (iEvent.type in this._iEvents) {
listeners = this._iEvents[iEvent.type];
for (i = 0, len = listeners.length; i < len && !iEvent.immediatePropagationStopped; i++) {
funcName = listeners[i].name;
listeners[i](iEvent);
}
}
// interactable.onevent listener
if (isFunction(this[onEvent])) {
funcName = this[onEvent].name;
this[onEvent](iEvent);
}
// interact.on() listeners
if (iEvent.type in globalEvents && (listeners = globalEvents[iEvent.type])) {
for (i = 0, len = listeners.length; i < len && !iEvent.immediatePropagationStopped; i++) {
funcName = listeners[i].name;
listeners[i](iEvent);
}
}
return this;
},
/*\
* Interactable.on
[ method ]
*
* Binds a listener for an InteractEvent or DOM event.
*
- eventType (string | array | object) The types of events to listen for
- listener (function) The function to be called on the given event(s)
- useCapture (boolean) #optional useCapture flag for addEventListener
= (object) This Interactable
\*/
on: function (eventType, listener, useCapture) {
var i;
if (isString(eventType) && eventType.search(' ') !== -1) {
eventType = eventType.trim().split(/ +/);
}
if (isArray(eventType)) {
for (i = 0; i < eventType.length; i++) {
this.on(eventType[i], listener, useCapture);
}
return this;
}
if (isObject(eventType)) {
for (var prop in eventType) {
this.on(prop, eventType[prop], listener);
}
return this;
}
if (eventType === 'wheel') {
eventType = wheelEvent;
}
// convert to boolean
useCapture = useCapture? true: false;
if (contains(eventTypes, eventType)) {
// if this type of event was never bound to this Interactable
if (!(eventType in this._iEvents)) {
this._iEvents[eventType] = [listener];
}
else {
this._iEvents[eventType].push(listener);
}
}
// delegated event for selector
else if (this.selector) {
if (!delegatedEvents[eventType]) {
delegatedEvents[eventType] = {
selectors: [],
contexts : [],
listeners: []
};
// add delegate listener functions
for (i = 0; i < documents.length; i++) {
events.add(documents[i], eventType, delegateListener);
events.add(documents[i], eventType, delegateUseCapture, true);
}
}
var delegated = delegatedEvents[eventType],
index;
for (index = delegated.selectors.length - 1; index >= 0; index--) {
if (delegated.selectors[index] === this.selector
&& delegated.contexts[index] === this._context) {
break;
}
}
if (index === -1) {
index = delegated.selectors.length;
delegated.selectors.push(this.selector);
delegated.contexts .push(this._context);
delegated.listeners.push([]);
}
// keep listener and useCapture flag
delegated.listeners[index].push([listener, useCapture]);
}
else {
events.add(this._element, eventType, listener, useCapture);
}
return this;
},
/*\
* Interactable.off
[ method ]
*
* Removes an InteractEvent or DOM event listener
*
- eventType (string | array | object) The types of events that were listened for
- listener (function) The listener function to be removed
- useCapture (boolean) #optional useCapture flag for removeEventListener
= (object) This Interactable
\*/
off: function (eventType, listener, useCapture) {
var i;
if (isString(eventType) && eventType.search(' ') !== -1) {
eventType = eventType.trim().split(/ +/);
}
if (isArray(eventType)) {
for (i = 0; i < eventType.length; i++) {
this.off(eventType[i], listener, useCapture);
}
return this;
}
if (isObject(eventType)) {
for (var prop in eventType) {
this.off(prop, eventType[prop], listener);
}
return this;
}
var eventList,
index = -1;
// convert to boolean
useCapture = useCapture? true: false;
if (eventType === 'wheel') {
eventType = wheelEvent;
}
// if it is an action event type
if (contains(eventTypes, eventType)) {
eventList = this._iEvents[eventType];
if (eventList && (index = indexOf(eventList, listener)) !== -1) {
this._iEvents[eventType].splice(index, 1);
}
}
// delegated event
else if (this.selector) {
var delegated = delegatedEvents[eventType],
matchFound = false;
if (!delegated) { return this; }
// count from last index of delegated to 0
for (index = delegated.selectors.length - 1; index >= 0; index--) {
// look for matching selector and context Node
if (delegated.selectors[index] === this.selector
&& delegated.contexts[index] === this._context) {
var listeners = delegated.listeners[index];
// each item of the listeners array is an array: [function, useCaptureFlag]
for (i = listeners.length - 1; i >= 0; i--) {
var fn = listeners[i][0],
useCap = listeners[i][1];
// check if the listener functions and useCapture flags match
if (fn === listener && useCap === useCapture) {
// remove the listener from the array of listeners
listeners.splice(i, 1);
// if all listeners for this interactable have been removed
// remove the interactable from the delegated arrays
if (!listeners.length) {
delegated.selectors.splice(index, 1);
delegated.contexts .splice(index, 1);
delegated.listeners.splice(index, 1);
// remove delegate function from context
events.remove(this._context, eventType, delegateListener);
events.remove(this._context, eventType, delegateUseCapture, true);
// remove the arrays if they are empty
if (!delegated.selectors.length) {
delegatedEvents[eventType] = null;
}
}
// only remove one listener
matchFound = true;
break;
}
}
if (matchFound) { break; }
}
}
}
// remove listener from this Interatable's element
else {
events.remove(this._element, eventType, listener, useCapture);
}
return this;
},
/*\
* Interactable.set
[ method ]
*
* Reset the options of this Interactable
- options (object) The new settings to apply
= (object) This Interactablw
\*/
set: function (options) {
if (!isObject(options)) {
options = {};
}
this.options = extend({}, defaultOptions.base);
var i,
actions = ['drag', 'drop', 'resize', 'gesture'],
methods = ['draggable', 'dropzone', 'resizable', 'gesturable'],
perActions = extend(extend({}, defaultOptions.perAction), options[action] || {});
for (i = 0; i < actions.length; i++) {
var action = actions[i];
this.options[action] = extend({}, defaultOptions[action]);
this.setPerAction(action, perActions);
this[methods[i]](options[action]);
}
var settings = [
'accept', 'actionChecker', 'allowFrom', 'deltaSource',
'dropChecker', 'ignoreFrom', 'origin', 'preventDefault',
'rectChecker'
];
for (i = 0, len = settings.length; i < len; i++) {
var setting = settings[i];
this.options[setting] = defaultOptions.base[setting];
if (setting in options) {
this[setting](options[setting]);
}
}
return this;
},
/*\
* Interactable.unset
[ method ]
*
* Remove this interactable from the list of interactables and remove
* it's drag, drop, resize and gesture capabilities
*
= (object) @interact
\*/
unset: function () {
events.remove(this, 'all');
if (!isString(this.selector)) {
events.remove(this, 'all');
if (this.options.styleCursor) {
this._element.style.cursor = '';
}
}
else {
// remove delegated events
for (var type in delegatedEvents) {
var delegated = delegatedEvents[type];
for (var i = 0; i < delegated.selectors.length; i++) {
if (delegated.selectors[i] === this.selector
&& delegated.contexts[i] === this._context) {
delegated.selectors.splice(i, 1);
delegated.contexts .splice(i, 1);
delegated.listeners.splice(i, 1);
// remove the arrays if they are empty
if (!delegated.selectors.length) {
delegatedEvents[type] = null;
}
}
events.remove(this._context, type, delegateListener);
events.remove(this._context, type, delegateUseCapture, true);
break;
}
}
}
this.dropzone(false);
interactables.splice(indexOf(interactables, this), 1);
return interact;
}
};
function warnOnce (method, message) {
var warned = false;
return function () {
if (!warned) {
window.console.warn(message);
warned = true;
}
return method.apply(this, arguments);
};
}
Interactable.prototype.snap = warnOnce(Interactable.prototype.snap,
'Interactable#snap is deprecated. See the new documentation for snapping at http://interactjs.io/docs/snapping');
Interactable.prototype.restrict = warnOnce(Interactable.prototype.restrict,
'Interactable#restrict is deprecated. See the new documentation for resticting at http://interactjs.io/docs/restriction');
Interactable.prototype.inertia = warnOnce(Interactable.prototype.inertia,
'Interactable#inertia is deprecated. See the new documentation for inertia at http://interactjs.io/docs/inertia');
Interactable.prototype.autoScroll = warnOnce(Interactable.prototype.autoScroll,
'Interactable#autoScroll is deprecated. See the new documentation for autoScroll at http://interactjs.io/docs/#autoscroll');
/*\
* interact.isSet
[ method ]
*
* Check if an element has been set
- element (Element) The Element being searched for
= (boolean) Indicates if the element or CSS selector was previously passed to interact
\*/
interact.isSet = function(element, options) {
return interactables.indexOfElement(element, options && options.context) !== -1;
};
/*\
* interact.on
[ method ]
*
* Adds a global listener for an InteractEvent or adds a DOM event to
* `document`
*
- type (string | array | object) The types of events to listen for
- listener (function) The function to be called on the given event(s)
- useCapture (boolean) #optional useCapture flag for addEventListener
= (object) interact
\*/
interact.on = function (type, listener, useCapture) {
if (isString(type) && type.search(' ') !== -1) {
type = type.trim().split(/ +/);
}
if (isArray(type)) {
for (var i = 0; i < type.length; i++) {
interact.on(type[i], listener, useCapture);
}
return interact;
}
if (isObject(type)) {
for (var prop in type) {
interact.on(prop, type[prop], listener);
}
return interact;
}
// if it is an InteractEvent type, add listener to globalEvents
if (contains(eventTypes, type)) {
// if this type of event was never bound
if (!globalEvents[type]) {
globalEvents[type] = [listener];
}
else {
globalEvents[type].push(listener);
}
}
// If non InteractEvent type, addEventListener to document
else {
events.add(document, type, listener, useCapture);
}
return interact;
};
/*\
* interact.off
[ method ]
*
* Removes a global InteractEvent listener or DOM event from `document`
*
- type (string | array | object) The types of events that were listened for
- listener (function) The listener function to be removed
- useCapture (boolean) #optional useCapture flag for removeEventListener
= (object) interact
\*/
interact.off = function (type, listener, useCapture) {
if (isString(type) && type.search(' ') !== -1) {
type = type.trim().split(/ +/);
}
if (isArray(type)) {
for (var i = 0; i < type.length; i++) {
interact.off(type[i], listener, useCapture);
}
return interact;
}
if (isObject(type)) {
for (var prop in type) {
interact.off(prop, type[prop], listener);
}
return interact;
}
if (!contains(eventTypes, type)) {
events.remove(document, type, listener, useCapture);
}
else {
var index;
if (type in globalEvents
&& (index = indexOf(globalEvents[type], listener)) !== -1) {
globalEvents[type].splice(index, 1);
}
}
return interact;
};
/*\
* interact.enableDragging
[ method ]
*
* Deprecated.
*
* Returns or sets whether dragging is enabled for any Interactables
*
- newValue (boolean) #optional `true` to allow the action; `false` to disable action for all Interactables
= (boolean | object) The current setting or interact
\*/
interact.enableDragging = warnOnce(function (newValue) {
if (newValue !== null && newValue !== undefined) {
actionIsEnabled.drag = newValue;
return interact;
}
return actionIsEnabled.drag;
}, 'interact.enableDragging is deprecated and will soon be removed.');
/*\
* interact.enableResizing
[ method ]
*
* Deprecated.
*
* Returns or sets whether resizing is enabled for any Interactables
*
- newValue (boolean) #optional `true` to allow the action; `false` to disable action for all Interactables
= (boolean | object) The current setting or interact
\*/
interact.enableResizing = warnOnce(function (newValue) {
if (newValue !== null && newValue !== undefined) {
actionIsEnabled.resize = newValue;
return interact;
}
return actionIsEnabled.resize;
}, 'interact.enableResizing is deprecated and will soon be removed.');
/*\
* interact.enableGesturing
[ method ]
*
* Deprecated.
*
* Returns or sets whether gesturing is enabled for any Interactables
*
- newValue (boolean) #optional `true` to allow the action; `false` to disable action for all Interactables
= (boolean | object) The current setting or interact
\*/
interact.enableGesturing = warnOnce(function (newValue) {
if (newValue !== null && newValue !== undefined) {
actionIsEnabled.gesture = newValue;
return interact;
}
return actionIsEnabled.gesture;
}, 'interact.enableGesturing is deprecated and will soon be removed.');
interact.eventTypes = eventTypes;
/*\
* interact.debug
[ method ]
*
* Returns debugging data
= (object) An object with properties that outline the current state and expose internal functions and variables
\*/
interact.debug = function () {
var interaction = interactions[0] || new Interaction();
return {
interactions : interactions,
target : interaction.target,
dragging : interaction.dragging,
resizing : interaction.resizing,
gesturing : interaction.gesturing,
prepared : interaction.prepared,
matches : interaction.matches,
matchElements : interaction.matchElements,
prevCoords : interaction.prevCoords,
startCoords : interaction.startCoords,
pointerIds : interaction.pointerIds,
pointers : interaction.pointers,
addPointer : listeners.addPointer,
removePointer : listeners.removePointer,
recordPointer : listeners.recordPointer,
snap : interaction.snapStatus,
restrict : interaction.restrictStatus,
inertia : interaction.inertiaStatus,
downTime : interaction.downTimes[0],
downEvent : interaction.downEvent,
downPointer : interaction.downPointer,
prevEvent : interaction.prevEvent,
Interactable : Interactable,
interactables : interactables,
pointerIsDown : interaction.pointerIsDown,
defaultOptions : defaultOptions,
defaultActionChecker : defaultActionChecker,
actionCursors : actionCursors,
dragMove : listeners.dragMove,
resizeMove : listeners.resizeMove,
gestureMove : listeners.gestureMove,
pointerUp : listeners.pointerUp,
pointerDown : listeners.pointerDown,
pointerMove : listeners.pointerMove,
pointerHover : listeners.pointerHover,
events : events,
globalEvents : globalEvents,
delegatedEvents : delegatedEvents
};
};
// expose the functions used to calculate multi-touch properties
interact.getTouchAverage = touchAverage;
interact.getTouchBBox = touchBBox;
interact.getTouchDistance = touchDistance;
interact.getTouchAngle = touchAngle;
interact.getElementRect = getElementRect;
interact.matchesSelector = matchesSelector;
interact.closest = closest;
/*\
* interact.margin
[ method ]
*
* Returns or sets the margin for autocheck resizing used in
* @Interactable.getAction. That is the distance from the bottom and right
* edges of an element clicking in which will start resizing
*
- newValue (number) #optional
= (number | interact) The current margin value or interact
\*/
interact.margin = function (newvalue) {
if (isNumber(newvalue)) {
margin = newvalue;
return interact;
}
return margin;
};
/*\
* interact.supportsTouch
[ method ]
*
= (boolean) Whether or not the browser supports touch input
\*/
interact.supportsTouch = function () {
return supportsTouch;
};
/*\
* interact.supportsPointerEvent
[ method ]
*
= (boolean) Whether or not the browser supports PointerEvents
\*/
interact.supportsPointerEvent = function () {
return supportsPointerEvent;
};
/*\
* interact.stop
[ method ]
*
* Cancels all interactions (end events are not fired)
*
- event (Event) An event on which to call preventDefault()
= (object) interact
\*/
interact.stop = function (event) {
for (var i = interactions.length - 1; i > 0; i--) {
interactions[i].stop(event);
}
return interact;
};
/*\
* interact.dynamicDrop
[ method ]
*
* Returns or sets whether the dimensions of dropzone elements are
* calculated on every dragmove or only on dragstart for the default
* dropChecker
*
- newValue (boolean) #optional True to check on each move. False to check only before start
= (boolean | interact) The current setting or interact
\*/
interact.dynamicDrop = function (newValue) {
if (isBool(newValue)) {
//if (dragging && dynamicDrop !== newValue && !newValue) {
//calcRects(dropzones);
//}
dynamicDrop = newValue;
return interact;
}
return dynamicDrop;
};
/*\
* interact.pointerMoveTolerance
[ method ]
* Returns or sets the distance the pointer must be moved before an action
* sequence occurs. This also affects tolerance for tap events.
*
- newValue (number) #optional The movement from the start position must be greater than this value
= (number | Interactable) The current setting or interact
\*/
interact.pointerMoveTolerance = function (newValue) {
if (isNumber(newValue)) {
pointerMoveTolerance = newValue;
return this;
}
return pointerMoveTolerance;
};
/*\
* interact.maxInteractions
[ method ]
**
* Returns or sets the maximum number of concurrent interactions allowed.
* By default only 1 interaction is allowed at a time (for backwards
* compatibility). To allow multiple interactions on the same Interactables
* and elements, you need to enable it in the draggable, resizable and
* gesturable `'max'` and `'maxPerElement'` options.
**
- newValue (number) #optional Any number. newValue <= 0 means no interactions.
\*/
interact.maxInteractions = function (newValue) {
if (isNumber(newValue)) {
maxInteractions = newValue;
return this;
}
return maxInteractions;
};
interact.createSnapGrid = function (grid) {
return function (x, y) {
var offsetX = 0,
offsetY = 0;
if (isObject(grid.offset)) {
offsetX = grid.offset.x;
offsetY = grid.offset.y;
}
var gridx = Math.round((x - offsetX) / grid.x),
gridy = Math.round((y - offsetY) / grid.y),
newX = gridx * grid.x + offsetX,
newY = gridy * grid.y + offsetY;
return {
x: newX,
y: newY,
range: grid.range
};
};
};
function endAllInteractions (event) {
for (var i = 0; i < interactions.length; i++) {
interactions[i].pointerEnd(event, event);
}
}
function listenToDocument (doc) {
if (contains(documents, doc)) { return; }
var win = doc.defaultView || doc.parentWindow;
// add delegate event listener
for (var eventType in delegatedEvents) {
events.add(doc, eventType, delegateListener);
events.add(doc, eventType, delegateUseCapture, true);
}
if (PointerEvent) {
if (PointerEvent === win.MSPointerEvent) {
pEventTypes = {
up: 'MSPointerUp', down: 'MSPointerDown', over: 'mouseover',
out: 'mouseout', move: 'MSPointerMove', cancel: 'MSPointerCancel' };
}
else {
pEventTypes = {
up: 'pointerup', down: 'pointerdown', over: 'pointerover',
out: 'pointerout', move: 'pointermove', cancel: 'pointercancel' };
}
events.add(doc, pEventTypes.down , listeners.selectorDown );
events.add(doc, pEventTypes.move , listeners.pointerMove );
events.add(doc, pEventTypes.over , listeners.pointerOver );
events.add(doc, pEventTypes.out , listeners.pointerOut );
events.add(doc, pEventTypes.up , listeners.pointerUp );
events.add(doc, pEventTypes.cancel, listeners.pointerCancel);
// autoscroll
events.add(doc, pEventTypes.move, autoScroll.edgeMove);
}
else {
events.add(doc, 'mousedown', listeners.selectorDown);
events.add(doc, 'mousemove', listeners.pointerMove );
events.add(doc, 'mouseup' , listeners.pointerUp );
events.add(doc, 'mouseover', listeners.pointerOver );
events.add(doc, 'mouseout' , listeners.pointerOut );
events.add(doc, 'touchstart' , listeners.selectorDown );
events.add(doc, 'touchmove' , listeners.pointerMove );
events.add(doc, 'touchend' , listeners.pointerUp );
events.add(doc, 'touchcancel', listeners.pointerCancel);
// autoscroll
events.add(doc, 'mousemove', autoScroll.edgeMove);
events.add(doc, 'touchmove', autoScroll.edgeMove);
}
events.add(win, 'blur', endAllInteractions);
try {
if (win.frameElement) {
var parentDoc = win.frameElement.ownerDocument,
parentWindow = parentDoc.defaultView;
events.add(parentDoc , 'mouseup' , listeners.pointerEnd);
events.add(parentDoc , 'touchend' , listeners.pointerEnd);
events.add(parentDoc , 'touchcancel' , listeners.pointerEnd);
events.add(parentDoc , 'pointerup' , listeners.pointerEnd);
events.add(parentDoc , 'MSPointerUp' , listeners.pointerEnd);
events.add(parentWindow, 'blur' , endAllInteractions );
}
}
catch (error) {
interact.windowParentError = error;
}
if (events.useAttachEvent) {
// For IE's lack of Event#preventDefault
events.add(doc, 'selectstart', function (event) {
var interaction = interactions[0];
if (interaction.currentAction()) {
interaction.checkAndPreventDefault(event);
}
});
// For IE's bad dblclick event sequence
events.add(doc, 'dblclick', doOnInteractions('ie8Dblclick'));
}
documents.push(doc);
}
listenToDocument(document);
function indexOf (array, target) {
for (var i = 0, len = array.length; i < len; i++) {
if (array[i] === target) {
return i;
}
}
return -1;
}
function contains (array, target) {
return indexOf(array, target) !== -1;
}
function matchesSelector (element, selector, nodeList) {
if (ie8MatchesSelector) {
return ie8MatchesSelector(element, selector, nodeList);
}
// remove /deep/ from selectors if shadowDOM polyfill is used
if (window !== realWindow) {
selector = selector.replace(/\/deep\//g, ' ');
}
return element[prefixedMatchesSelector](selector);
}
function matchesUpTo (element, selector, limit) {
while (isElement(element)) {
if (matchesSelector(element, selector)) {
return true;
}
element = parentElement(element);
if (element === limit) {
return matchesSelector(element, selector);
}
}
return false;
}
// For IE8's lack of an Element#matchesSelector
// taken from http://tanalin.com/en/blog/2012/12/matches-selector-ie8/ and modified
if (!(prefixedMatchesSelector in Element.prototype) || !isFunction(Element.prototype[prefixedMatchesSelector])) {
ie8MatchesSelector = function (element, selector, elems) {
elems = elems || element.parentNode.querySelectorAll(selector);
for (var i = 0, len = elems.length; i < len; i++) {
if (elems[i] === element) {
return true;
}
}
return false;
};
}
// requestAnimationFrame polyfill
(function() {
var lastTime = 0,
vendors = ['ms', 'moz', 'webkit', 'o'];
for(var x = 0; x < vendors.length && !realWindow.requestAnimationFrame; ++x) {
reqFrame = realWindow[vendors[x]+'RequestAnimationFrame'];
cancelFrame = realWindow[vendors[x]+'CancelAnimationFrame'] || realWindow[vendors[x]+'CancelRequestAnimationFrame'];
}
if (!reqFrame) {
reqFrame = function(callback) {
var currTime = new Date().getTime(),
timeToCall = Math.max(0, 16 - (currTime - lastTime)),
id = setTimeout(function() { callback(currTime + timeToCall); },
timeToCall);
lastTime = currTime + timeToCall;
return id;
};
}
if (!cancelFrame) {
cancelFrame = function(id) {
clearTimeout(id);
};
}
}());
/* global exports: true, module, define */
// http://documentcloud.github.io/underscore/docs/underscore.html#section-11
if (typeof exports !== 'undefined') {
if (typeof module !== 'undefined' && module.exports) {
exports = module.exports = interact;
}
exports.interact = interact;
}
// AMD
else if (typeof define === 'function' && define.amd) {
define('interact', function() {
return interact;
});
}
else {
realWindow.interact = interact;
}
} (window));