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grope.js
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grope.js
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(function (factory) {
if (typeof module === 'object' && typeof module.exports === 'object') {
var v = factory(require, exports); if (v !== undefined) module.exports = v;
}
else if (typeof define === 'function' && define.amd) {
define(["require", "exports"], factory);
}
})(function (require, exports) {
"use strict";
/**
* Export function of the module
*
* @param {HTMLElement} container - The HTMLElement to grope ;-)
* @param {Options} options - the options object to configure Grope
* @return {Grope} - Grope object instance
*/
function grope(containers, options) {
if (options === void 0) { options = {}; }
var c = containers instanceof Array ? containers : new Array(containers);
/**
* Polyfill bind function for older browsers
* The bind function is an addition to ECMA-262, 5th edition
* @see: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Function/bind
*/
if (!Function.prototype.bind) {
Function.prototype.bind = function (oThis) {
if (typeof this !== 'function') {
// closest thing possible to the ECMAScript 5
// internal IsCallable function
throw new TypeError('Function.prototype.bind - what is trying to be bound is not callable');
}
var aArgs = Array.prototype.slice.call(arguments, 1), fToBind = this, fNOP = function () { }, fBound = function () {
return fToBind.apply(this instanceof fNOP
? this
: oThis, aArgs.concat(Array.prototype.slice.call(arguments)));
};
if (this.prototype) {
// Function.prototype doesn't have a prototype property
fNOP.prototype = this.prototype;
}
fBound.prototype = new fNOP();
return fBound;
};
}
/* list of real events */
var htmlEvents = {
/* <body> and <frameset> Events */
onload: 1,
onunload: 1,
/* Form Events */
onblur: 1,
onchange: 1,
onfocus: 1,
onreset: 1,
onselect: 1,
onsubmit: 1,
/* Image Events */
onabort: 1,
/* Keyboard Events */
onkeydown: 1,
onkeypress: 1,
onkeyup: 1,
/* Mouse Events */
onclick: 1,
ondblclick: 1,
onmousedown: 1,
onmousemove: 1,
onmouseout: 1,
onmouseover: 1,
onmouseup: 1
};
var mapEvents = {
onscroll: window
};
/**
* Grope
*
* @author Roman Gruber <p1020389@yahoo.com>
* @version 1.0
*/
var Grope = (function () {
function Grope(containers, options) {
this.containers = containers;
this.options = options;
this.gropeElement = null;
this.gropeClone = null;
this.gropeContainer = null;
this.originGropeContainer = null;
this.copyElement = null;
this.mapping = [];
this.originMapping = [];
this.rectCache = [];
/* CSS style classes */
this.classGropable = 'gr-gropable';
this.classTossZone = 'gr-tosszone';
this.classGroping = 'gr-groping';
this.classModeGroping = 'gr-mode-groping';
this.classMove = 'move';
this.classCopy = 'copy';
this.classDisappear = 'gr-disappear';
this.mouseDownHandlers = [];
/* array holding the custom events mapping callbacks to bound callbacks */
this.customEvents = [];
this.containers = containers;
/* set default options */
this.options = {
/* CSS class selector to match elements which should become dragable inside the containers */
elements: ['div'],
/* A callback returning true or false whether the element is allowed to drop. The drag will be
* reverted if this returns false. The callback will be invoked with the following parameters:
* @param {HTMLElement} element - the dragged element (optional).
* @param {HTMLElement} from - the container where the element is from (optional).
* @param {HTMLElement} to - the target container (optional).
* @return {boolean} - whether draging is allowed or not.
*/
tossCallback: function () { return true; },
/* TODO: with keydown and keyup */
copy: false
};
/* merge the default option objects with the provided one */
for (var key in options) {
if (options.hasOwnProperty(key)) {
if (typeof options[key] == 'object') {
for (var okey in options[key]) {
if (options[key].hasOwnProperty(okey))
this.options[key][okey] = options[key][okey];
}
}
else {
this.options[key] = options[key];
}
}
}
this.init();
}
/**
* Initialize DOM manipulations and event handlers
*
* @return {void}
*/
Grope.prototype.init = function () {
var _this = this;
//for (var container of this.containers) {
for (var i in this.containers) {
var container = this.containers[i];
this.addClass(container, this.classTossZone);
var a = 0;
this.mapping[i] = [];
for (var _i = 0, _a = container.querySelectorAll(this.options.elements.join(', ')); _i < _a.length; _i++) {
var el = _a[_i];
this.addClass(el, this.classGropable);
this.addClass(el, this.options.copy ? this.classCopy : this.classMove);
this.mapping[i][a] = el;
/* mousedown handler */
var callback = function (e) { return _this.mouseDown(e); };
this.addEventListener(el, 'mousedown', callback);
a++;
}
}
};
/**
* Reinitialize the grope element
*
* @return {Grope} - The Grope object instance
*/
Grope.prototype.reinit = function () {
};
Grope.prototype.remap = function () {
this.mapping = [];
this.rectCache = [];
for (var i in this.containers) {
this.mapping[i] = [];
var a = 0;
for (var _i = 0, _a = this.containers[i].querySelectorAll(this.options.elements.join(', ')); _i < _a.length; _i++) {
var el = _a[_i];
if (el !== this.gropeClone) {
this.mapping[i][a] = el;
a++;
}
}
}
return this.mapping;
};
/**
* Mouse down handler
* TODO
*
* @param {MouseEvent} e - The mouse down event object
* @return {void}
*/
Grope.prototype.mouseDown = function (e) {
var _this = this;
this.originMapping = this.remap();
this.gropeElement = this.getElementBehindCursor(e.clientX, e.clientY);
this.gropeContainer = this.getContainerByGropeElement(this.gropeElement);
this.originGropeContainer = this.gropeContainer;
if (this.gropeContainer != null) {
if (this.options.copy === true) {
this.copyElement = this.gropeElement;
this.gropeElement = this.gropeElement.cloneNode(true);
;
this.gropeContainer.insertBefore(this.gropeElement, this.copyElement);
var callback = function (e) { return _this.mouseDown(e); };
this.addEventListener(this.gropeElement, 'mousedown', callback);
this.remap();
}
this.gropeClone = this.gropeElement.cloneNode(true);
//TODO maybe not neccessary (copyComputedStyle), because cloneElement will be in the same parent
//this.copyComputedStyle(this.gropeElement, this.gropeClone);
this.gropeClone.style.width = this.gropeElement.offsetWidth + 'px';
this.gropeClone.style.height = this.gropeElement.offsetHeight + 'px';
this.addClass(this.gropeClone, this.classGroping);
this.addClass(this.gropeElement, this.classDisappear);
this.addClass(document.body, this.classModeGroping);
this.addClass(document.body, this.options.copy ? this.classCopy : this.classMove);
var rect = this.getRect(this.gropeElement, true);
this.deltaX = e.clientX - rect.left;
this.deltaY = e.clientY - rect.top;
this.mouseMove(e);
this.gropeContainer.appendChild(this.gropeClone);
/* mousemove handler */
this.mouseMoveHandler = function (e) { return _this.mouseMove(e); };
this.addEventListener(document.documentElement, 'mousemove', this.mouseMoveHandler);
/* mouseup handler */
this.mouseUpHandler = function (e) { return _this.mouseUp(e); };
this.addEventListener(document.documentElement, 'mouseup', this.mouseUpHandler);
}
};
/**
* Mouse up handler
* TODO
*
* @param {MouseEvent} e - The mouse up event object
* @return {void}
*/
Grope.prototype.mouseUp = function (e) {
this.removeEventListener(document.documentElement, 'mousemove', this.mouseMoveHandler);
this.removeEventListener(document.documentElement, 'mouseup', this.mouseUpHandler);
this.removeClass(this.gropeElement, this.classDisappear);
this.removeClass(document.body, this.classModeGroping);
this.removeClass(document.body, this.classCopy);
this.removeClass(document.body, this.classMove);
this.gropeClone.parentNode.removeChild(this.gropeClone);
for (var _i = 0, _a = this.containers; _i < _a.length; _i++) {
var container = _a[_i];
this.removeClass(container, 'active');
}
if (this.options.tossCallback(this.gropeElement, this.originGropeContainer, this.gropeContainer) === false) {
this.revertChanges();
}
this.gropeElement = null;
this.gropeClone = null;
this.gropeContainer = null;
this.copyElement = null;
};
/**
* Mouse move handler
* TODO
*
* @param {MouseEvent} e - The mouse move event object
* @return {void}
*/
Grope.prototype.mouseMove = function (e) {
/* if the mouse left the window and the button is not pressed anymore, abort moving */
if (("which" in e && e.which == 0) || (typeof e.which == 'undefined' && "button" in e && e.button == 0)) {
this.mouseUp(e);
return;
}
var container;
var x = e.clientX;
var y = e.clientY;
this.gropeClone.style.left = (x - this.deltaX) + 'px';
this.gropeClone.style.top = (y - this.deltaY) + 'px';
var found = false;
for (var i in this.mapping) {
for (var _i = 0, _a = this.mapping[i]; _i < _a.length; _i++) {
var gropeElement = _a[_i];
var coords = this.getRect(gropeElement);
if (found === false
&& x >= coords.left
&& x <= (gropeElement.offsetWidth + coords.left)
&& y >= coords.top
&& y <= (gropeElement.offsetHeight + coords.top)) {
found = true;
container = this.getContainerByGropeElement(gropeElement);
this.addClass(container, 'active');
if (gropeElement != this.gropeElement) {
var pos = this.gropeElement.compareDocumentPosition(gropeElement);
if (pos == Node.DOCUMENT_POSITION_PRECEDING) {
container.insertBefore(this.gropeElement, gropeElement);
this.gropeContainer = container;
this.remap();
}
else if (pos == Node.DOCUMENT_POSITION_FOLLOWING) {
container.insertBefore(this.gropeElement, gropeElement.nextSibling);
this.gropeContainer = container;
this.remap();
}
}
}
}
}
if (found === false) {
for (var _b = 0, _c = this.containers; _b < _c.length; _b++) {
container = _c[_b];
var coords = this.getRect(container);
/* if the element is held over a container element, but not an other grope element,
* it should be appended to that container */
if (found === false
&& x >= coords.left
&& x <= (container.offsetWidth + coords.left)
&& y >= coords.top
&& y <= (container.offsetHeight + coords.top)) {
found = true;
this.addClass(container, 'active');
if (container != this.gropeContainer) {
container.appendChild(this.gropeElement);
container.appendChild(this.gropeClone);
this.gropeContainer = container;
this.remap();
}
}
else {
this.removeClass(container, 'active');
}
}
}
};
Grope.prototype.revertChanges = function () {
//TODO: revert multiple changes
this.revertCopy();
};
Grope.prototype.revertMove = function () {
for (var i in this.originMapping) {
for (var a in this.originMapping[i]) {
if (this.originMapping[i][a] == this.gropeElement) {
this.getContainerByGropeElement(this.gropeElement).removeChild(this.gropeElement);
var list = this.originGropeContainer.querySelectorAll(this.options.elements.join(', '));
this.originGropeContainer.insertBefore(this.gropeElement, list[a]);
return;
}
}
}
};
Grope.prototype.revertCopy = function () {
if (this.copyElement !== null) {
this.getContainerByGropeElement(this.gropeElement).removeChild(this.gropeElement);
this.gropeElement = this.copyElement;
this.copyElement = null;
}
this.revertMove();
};
Grope.prototype.getRect = function (el, live) {
if (live === void 0) { live = false; }
if (live === false) {
for (var _i = 0, _a = this.rectCache; _i < _a.length; _i++) {
var data = _a[_i];
if (data.object == el) {
return data.rect;
}
}
}
var rect = el.getBoundingClientRect();
this.rectCache.push({ object: el, rect: rect });
return rect;
};
Grope.prototype.copyComputedStyle = function (from, to) {
var computedStyle = false;
computedStyle = from.currentStyle || document.defaultView.getComputedStyle(from, null);
if (!computedStyle) {
return null;
}
;
for (var _i = 0, _a = computedStyle; _i < _a.length; _i++) {
var property = _a[_i];
var value = computedStyle[property];
if (typeof value !== 'undefined'
&& typeof value !== 'object'
&& typeof value !== 'function'
&& value.length > 0
&& value != parseInt(value)) {
to.style[property] = value;
}
}
};
Grope.prototype.addClass = function (el, cssClass) {
if (!this.hasClass(el, cssClass)) {
el.className += " " + cssClass + " ";
}
};
Grope.prototype.removeClass = function (el, cssClass) {
var re = new RegExp(" " + cssClass + " ", 'g');
el.className = el.className.replace(re, '');
};
Grope.prototype.hasClass = function (el, cssClass) {
var re = new RegExp(" " + cssClass + " ");
return el.className.match(re) !== null;
};
Grope.prototype.getContainerByGropeElement = function (el) {
for (var i in this.mapping) {
for (var _i = 0, _a = this.mapping[i]; _i < _a.length; _i++) {
var gropeElement = _a[_i];
if (gropeElement == el) {
return this.containers[i];
}
}
}
return null;
};
Grope.prototype.getElementBehindCursor = function (x, y) {
var elementBehindCursor = document.elementFromPoint(x, y);
/* find the next parent which is an gropable element */
while (elementBehindCursor && !this.hasClass(elementBehindCursor, this.classGropable)) {
elementBehindCursor = elementBehindCursor.parentElement;
}
return elementBehindCursor;
};
/**
* Browser independent event registration
*
* @param {any} obj - The HTMLElement to attach the event to
* @param {string} event - The event name without the leading "on"
* @param {(e: Event) => void} callback - A callback function to attach to the event
* @param {boolean} bound - whether to bind the callback to the object instance or not
* @return {void}
*/
Grope.prototype.addEventListener = function (obj, event, callback, bound) {
if (bound === void 0) { bound = true; }
var boundCallback = bound ? callback.bind(this) : callback;
if (typeof obj.addEventListener == 'function') {
if (mapEvents['on' + event] && obj.tagName == "BODY") {
obj = mapEvents['on' + event];
}
obj.addEventListener(event, boundCallback);
}
else if (typeof obj.attachEvent == 'object' && htmlEvents['on' + event]) {
obj.attachEvent('on' + event, boundCallback);
}
else if (typeof obj.attachEvent == 'object' && mapEvents['on' + event]) {
if (obj.tagName == "BODY") {
var p = 'on' + event;
/* example: window.onscroll = boundCallback */
mapEvents[p][p] = boundCallback;
}
else {
/* TODO: obj.onscroll ?? */
obj.onscroll = boundCallback;
}
}
else if (typeof obj.attachEvent == 'object') {
obj[event] = 1;
boundCallback = function (e) {
/* TODO: e is the onpropertychange event not one of the custom event objects */
if (e.propertyName == event) {
callback(e);
}
};
obj.attachEvent('onpropertychange', boundCallback);
}
else {
obj['on' + event] = boundCallback;
}
this.customEvents[event] ? null : (this.customEvents[event] = []);
this.customEvents[event].push([callback, boundCallback]);
};
/**
* Browser independent event deregistration
*
* @param {any} obj - The HTMLElement or window whose event should be detached
* @param {string} event - The event name without the leading "on"
* @param {(e: Event) => void} callback - The callback function when attached
* @return {void}
*
* @TODO: unregistering of mapEvents
*/
Grope.prototype.removeEventListener = function (obj, event, callback) {
if (event in this.customEvents) {
for (var i in this.customEvents[event]) {
/* if the event was found in the array by its callback reference */
if (this.customEvents[event][i][0] == callback) {
/* remove the listener from the array by its bound callback reference */
callback = this.customEvents[event][i][1];
this.customEvents[event].splice(i, 1);
break;
}
}
}
if (typeof obj.removeEventListener == 'function') {
obj.removeEventListener(event, callback);
}
else if (typeof obj.detachEvent == 'object' && htmlEvents['on' + event]) {
obj.detachEvent('on' + event, callback);
}
else if (typeof obj.detachEvent == 'object') {
obj.detachEvent('onpropertychange', callback);
}
else {
obj['on' + event] = null;
}
};
/**
* Browser independent event trigger function
*
* @param {HTMLElement} obj - The HTMLElement which triggers the event
* @param {string} eventName - The event name without the leading "on"
* @return {void}
*/
Grope.prototype.triggerEvent = function (obj, eventName) {
var event;
if (typeof window.CustomEvent === 'function') {
event = new CustomEvent(eventName);
}
else if (typeof document.createEvent == 'function') {
event = document.createEvent("HTMLEvents");
event.initEvent(eventName, true, true);
}
else if (document.createEventObject) {
event = document.createEventObject();
event.eventType = eventName;
}
event.eventName = eventName;
if (obj.dispatchEvent) {
obj.dispatchEvent(event);
}
else if (obj[eventName]) {
obj[eventName]++;
}
else if (obj.fireEvent && htmlEvents['on' + eventName]) {
obj.fireEvent('on' + event.eventType, event);
}
else if (obj[eventName]) {
obj[eventName]();
}
else if (obj['on' + eventName]) {
obj['on' + eventName]();
}
};
/**
* Get a css style property value browser independent
*
* @param {HTMLElement} el - The HTMLElement to lookup
* @param {string} jsProperty - The css property name in javascript in camelCase (e.g. "marginLeft", not "margin-left")
* @return {string} - the property value
*/
Grope.prototype.getStyle = function (el, jsProperty) {
var cssProperty = jsProperty.replace(/([A-Z])/g, "-$1").toLowerCase();
if (typeof window.getComputedStyle == 'function') {
return window.getComputedStyle(el).getPropertyValue(cssProperty);
}
else {
return el.currentStyle[jsProperty];
}
};
/**
* Register custom event callbacks
* @TODO
*
* @param {string} event - The event name
* @param {(e: Event) => any} callback - A callback function to execute when the event raises
* @return {Grope} - The Grope object instance
*/
Grope.prototype.on = function (event, callback) {
return this;
};
/**
* Deregister custom event callbacks
* @TODO
*
* @param {string} event - The event name
* @param {(e: Event) => any} callback - A callback function to execute when the event raises
* @return {Grope} - The Grope object instance
*/
Grope.prototype.off = function (event, callback) {
return this;
};
/**
* Revert all DOM manipulations and deregister all event handlers
* @TODO
*
* @return {void}
*/
Grope.prototype.destroy = function () {
return;
};
return Grope;
}());
/* return an instance of the class */
return new Grope(c, options);
}
return grope;
});
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