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595 lines
16 KiB
JavaScript
Executable File
595 lines
16 KiB
JavaScript
Executable File
/*!
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* iScroll Lite base on iScroll v4.1.6 ~ Copyright (c) 2011 Matteo Spinelli, http://cubiq.org
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* Released under MIT license, http://cubiq.org/license
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*/
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(function(){
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var m = Math,
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mround = function (r) { return r >> 0; },
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vendor = (/webkit/i).test(navigator.appVersion) ? 'webkit' :
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(/firefox/i).test(navigator.userAgent) ? 'Moz' :
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'opera' in window ? 'O' : '',
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// Browser capabilities
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isAndroid = (/android/gi).test(navigator.appVersion),
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isIDevice = (/iphone|ipad/gi).test(navigator.appVersion),
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isPlaybook = (/playbook/gi).test(navigator.appVersion),
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isTouchPad = (/hp-tablet/gi).test(navigator.appVersion),
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has3d = 'WebKitCSSMatrix' in window && 'm11' in new WebKitCSSMatrix(),
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hasTouch = 'ontouchstart' in window && !isTouchPad,
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hasTransform = vendor + 'Transform' in document.documentElement.style,
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hasTransitionEnd = isIDevice || isPlaybook,
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nextFrame = (function() {
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return window.requestAnimationFrame
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|| window.webkitRequestAnimationFrame
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|| window.mozRequestAnimationFrame
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|| window.oRequestAnimationFrame
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|| window.msRequestAnimationFrame
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|| function(callback) { return setTimeout(callback, 17); }
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})(),
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cancelFrame = (function () {
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return window.cancelRequestAnimationFrame
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|| window.webkitCancelAnimationFrame
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|| window.webkitCancelRequestAnimationFrame
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|| window.mozCancelRequestAnimationFrame
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|| window.oCancelRequestAnimationFrame
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|| window.msCancelRequestAnimationFrame
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|| clearTimeout
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})(),
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// Events
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RESIZE_EV = 'onorientationchange' in window ? 'orientationchange' : 'resize',
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START_EV = hasTouch ? 'touchstart' : 'mousedown',
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MOVE_EV = hasTouch ? 'touchmove' : 'mousemove',
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END_EV = hasTouch ? 'touchend' : 'mouseup',
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CANCEL_EV = hasTouch ? 'touchcancel' : 'mouseup',
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// Helpers
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trnOpen = 'translate' + (has3d ? '3d(' : '('),
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trnClose = has3d ? ',0)' : ')',
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// Constructor
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iScroll = function (el, options) {
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var that = this,
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doc = document,
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i;
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that.wrapper = typeof el == 'object' ? el : doc.getElementById(el);
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that.wrapper.style.overflow = 'hidden';
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that.scroller = that.wrapper.children[0];
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// Default options
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that.options = {
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hScroll: true,
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vScroll: true,
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x: 0,
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y: 0,
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bounce: true,
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bounceLock: false,
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momentum: true,
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lockDirection: true,
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useTransform: true,
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useTransition: false,
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// Events
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onRefresh: null,
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onBeforeScrollStart: function (e) { e.preventDefault(); },
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onScrollStart: null,
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onBeforeScrollMove: null,
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onScrollMove: null,
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onBeforeScrollEnd: null,
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onScrollEnd: null,
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onTouchEnd: null,
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onDestroy: null
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};
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// User defined options
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for (i in options) that.options[i] = options[i];
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// Set starting position
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that.x = that.options.x;
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that.y = that.options.y;
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// Normalize options
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that.options.useTransform = hasTransform ? that.options.useTransform : false;
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that.options.hScrollbar = that.options.hScroll && that.options.hScrollbar;
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that.options.vScrollbar = that.options.vScroll && that.options.vScrollbar;
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that.options.useTransition = hasTransitionEnd && that.options.useTransition;
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// Set some default styles
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that.scroller.style[vendor + 'TransitionProperty'] = that.options.useTransform ? '-' + vendor.toLowerCase() + '-transform' : 'top left';
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that.scroller.style[vendor + 'TransitionDuration'] = '0';
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that.scroller.style[vendor + 'TransformOrigin'] = '0 0';
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if (that.options.useTransition) that.scroller.style[vendor + 'TransitionTimingFunction'] = 'cubic-bezier(0.33,0.66,0.66,1)';
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if (that.options.useTransform) that.scroller.style[vendor + 'Transform'] = trnOpen + that.x + 'px,' + that.y + 'px' + trnClose;
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else that.scroller.style.cssText += ';position:absolute;top:' + that.y + 'px;left:' + that.x + 'px';
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that.refresh();
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that._bind(RESIZE_EV, window);
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that._bind(START_EV);
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if (!hasTouch) that._bind('mouseout', that.wrapper);
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};
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// Prototype
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iScroll.prototype = {
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enabled: true,
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x: 0,
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y: 0,
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steps: [],
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scale: 1,
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handleEvent: function (e) {
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var that = this;
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switch(e.type) {
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case START_EV:
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if (!hasTouch && e.button !== 0) return;
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that._start(e);
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break;
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case MOVE_EV: that._move(e); break;
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case END_EV:
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case CANCEL_EV: that._end(e); break;
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case RESIZE_EV: that._resize(); break;
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case 'mouseout': that._mouseout(e); break;
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case 'webkitTransitionEnd': that._transitionEnd(e); break;
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}
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},
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_resize: function () {
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this.refresh();
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},
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_pos: function (x, y) {
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x = this.hScroll ? x : 0;
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y = this.vScroll ? y : 0;
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if (this.options.useTransform) {
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this.scroller.style[vendor + 'Transform'] = trnOpen + x + 'px,' + y + 'px' + trnClose + ' scale(' + this.scale + ')';
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} else {
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x = mround(x);
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y = mround(y);
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this.scroller.style.left = x + 'px';
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this.scroller.style.top = y + 'px';
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}
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this.x = x;
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this.y = y;
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},
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_start: function (e) {
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var that = this,
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point = hasTouch ? e.touches[0] : e,
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matrix, x, y;
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if (!that.enabled) return;
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if (that.options.onBeforeScrollStart) that.options.onBeforeScrollStart.call(that, e);
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if (that.options.useTransition) that._transitionTime(0);
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that.moved = false;
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that.animating = false;
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that.zoomed = false;
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that.distX = 0;
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that.distY = 0;
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that.absDistX = 0;
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that.absDistY = 0;
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that.dirX = 0;
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that.dirY = 0;
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if (that.options.momentum) {
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if (that.options.useTransform) {
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// Very lame general purpose alternative to CSSMatrix
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matrix = getComputedStyle(that.scroller, null)[vendor + 'Transform'].replace(/[^0-9-.,]/g, '').split(',');
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x = matrix[4] * 1;
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y = matrix[5] * 1;
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} else {
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x = getComputedStyle(that.scroller, null).left.replace(/[^0-9-]/g, '') * 1;
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y = getComputedStyle(that.scroller, null).top.replace(/[^0-9-]/g, '') * 1;
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}
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if (x != that.x || y != that.y) {
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if (that.options.useTransition) that._unbind('webkitTransitionEnd');
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else cancelFrame(that.aniTime);
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that.steps = [];
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that._pos(x, y);
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}
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}
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that.startX = that.x;
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that.startY = that.y;
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that.pointX = point.pageX;
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that.pointY = point.pageY;
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that.startTime = e.timeStamp || Date.now();
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if (that.options.onScrollStart) that.options.onScrollStart.call(that, e);
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that._bind(MOVE_EV);
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that._bind(END_EV);
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that._bind(CANCEL_EV);
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},
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_move: function (e) {
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var that = this,
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point = hasTouch ? e.touches[0] : e,
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deltaX = point.pageX - that.pointX,
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deltaY = point.pageY - that.pointY,
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newX = that.x + deltaX,
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newY = that.y + deltaY,
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timestamp = e.timeStamp || Date.now();
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if (that.options.onBeforeScrollMove) that.options.onBeforeScrollMove.call(that, e);
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that.pointX = point.pageX;
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that.pointY = point.pageY;
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// Slow down if outside of the boundaries
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if (newX > 0 || newX < that.maxScrollX) {
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newX = that.options.bounce ? that.x + (deltaX / 2) : newX >= 0 || that.maxScrollX >= 0 ? 0 : that.maxScrollX;
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}
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if (newY > 0 || newY < that.maxScrollY) {
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newY = that.options.bounce ? that.y + (deltaY / 2) : newY >= 0 || that.maxScrollY >= 0 ? 0 : that.maxScrollY;
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}
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that.distX += deltaX;
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that.distY += deltaY;
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that.absDistX = m.abs(that.distX);
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that.absDistY = m.abs(that.distY);
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if (that.absDistX < 6 && that.absDistY < 6) {
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return;
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}
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// Lock direction
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if (that.options.lockDirection) {
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if (that.absDistX > that.absDistY + 5) {
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newY = that.y;
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deltaY = 0;
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} else if (that.absDistY > that.absDistX + 5) {
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newX = that.x;
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deltaX = 0;
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}
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}
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that.moved = true;
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that._pos(newX, newY);
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that.dirX = deltaX > 0 ? -1 : deltaX < 0 ? 1 : 0;
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that.dirY = deltaY > 0 ? -1 : deltaY < 0 ? 1 : 0;
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if (timestamp - that.startTime > 300) {
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that.startTime = timestamp;
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that.startX = that.x;
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that.startY = that.y;
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}
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if (that.options.onScrollMove) that.options.onScrollMove.call(that, e);
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},
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_end: function (e) {
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if (hasTouch && e.touches.length != 0) return;
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var that = this,
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point = hasTouch ? e.changedTouches[0] : e,
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target, ev,
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momentumX = { dist:0, time:0 },
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momentumY = { dist:0, time:0 },
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duration = (e.timeStamp || Date.now()) - that.startTime,
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newPosX = that.x,
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newPosY = that.y,
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newDuration;
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that._unbind(MOVE_EV);
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that._unbind(END_EV);
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that._unbind(CANCEL_EV);
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if (that.options.onBeforeScrollEnd) that.options.onBeforeScrollEnd.call(that, e);
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if (!that.moved) {
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if (hasTouch) {
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// Find the last touched element
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target = point.target;
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while (target.nodeType != 1) target = target.parentNode;
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if (target.tagName != 'SELECT' && target.tagName != 'INPUT' && target.tagName != 'TEXTAREA') {
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ev = document.createEvent('MouseEvents');
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ev.initMouseEvent('click', true, true, e.view, 1,
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point.screenX, point.screenY, point.clientX, point.clientY,
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e.ctrlKey, e.altKey, e.shiftKey, e.metaKey,
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0, null);
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ev._fake = true;
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target.dispatchEvent(ev);
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}
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}
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that._resetPos(200);
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if (that.options.onTouchEnd) that.options.onTouchEnd.call(that, e);
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return;
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}
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if (duration < 300 && that.options.momentum) {
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momentumX = newPosX ? that._momentum(newPosX - that.startX, duration, -that.x, that.scrollerW - that.wrapperW + that.x, that.options.bounce ? that.wrapperW : 0) : momentumX;
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momentumY = newPosY ? that._momentum(newPosY - that.startY, duration, -that.y, (that.maxScrollY < 0 ? that.scrollerH - that.wrapperH + that.y : 0), that.options.bounce ? that.wrapperH : 0) : momentumY;
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newPosX = that.x + momentumX.dist;
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newPosY = that.y + momentumY.dist;
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if ((that.x > 0 && newPosX > 0) || (that.x < that.maxScrollX && newPosX < that.maxScrollX)) momentumX = { dist:0, time:0 };
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if ((that.y > 0 && newPosY > 0) || (that.y < that.maxScrollY && newPosY < that.maxScrollY)) momentumY = { dist:0, time:0 };
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}
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if (momentumX.dist || momentumY.dist) {
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newDuration = m.max(m.max(momentumX.time, momentumY.time), 10);
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that.scrollTo(mround(newPosX), mround(newPosY), newDuration);
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if (that.options.onTouchEnd) that.options.onTouchEnd.call(that, e);
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return;
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}
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that._resetPos(200);
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if (that.options.onTouchEnd) that.options.onTouchEnd.call(that, e);
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},
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_resetPos: function (time) {
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var that = this,
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resetX = that.x >= 0 ? 0 : that.x < that.maxScrollX ? that.maxScrollX : that.x,
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resetY = that.y >= 0 || that.maxScrollY > 0 ? 0 : that.y < that.maxScrollY ? that.maxScrollY : that.y;
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if (resetX == that.x && resetY == that.y) {
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if (that.moved) {
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if (that.options.onScrollEnd) that.options.onScrollEnd.call(that); // Execute custom code on scroll end
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that.moved = false;
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}
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return;
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}
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that.scrollTo(resetX, resetY, time || 0);
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},
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_mouseout: function (e) {
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var t = e.relatedTarget;
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if (!t) {
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this._end(e);
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return;
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}
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while (t = t.parentNode) if (t == this.wrapper) return;
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this._end(e);
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},
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_transitionEnd: function (e) {
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var that = this;
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if (e.target != that.scroller) return;
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that._unbind('webkitTransitionEnd');
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that._startAni();
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},
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/**
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*
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* Utilities
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*
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*/
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_startAni: function () {
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var that = this,
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startX = that.x, startY = that.y,
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startTime = Date.now(),
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step, easeOut,
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animate;
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if (that.animating) return;
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if (!that.steps.length) {
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that._resetPos(400);
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return;
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}
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step = that.steps.shift();
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if (step.x == startX && step.y == startY) step.time = 0;
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that.animating = true;
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that.moved = true;
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if (that.options.useTransition) {
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that._transitionTime(step.time);
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that._pos(step.x, step.y);
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that.animating = false;
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if (step.time) that._bind('webkitTransitionEnd');
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else that._resetPos(0);
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return;
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}
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animate = function () {
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var now = Date.now(),
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newX, newY;
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if (now >= startTime + step.time) {
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that._pos(step.x, step.y);
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that.animating = false;
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if (that.options.onAnimationEnd) that.options.onAnimationEnd.call(that); // Execute custom code on animation end
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that._startAni();
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return;
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}
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now = (now - startTime) / step.time - 1;
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easeOut = m.sqrt(1 - now * now);
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newX = (step.x - startX) * easeOut + startX;
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newY = (step.y - startY) * easeOut + startY;
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that._pos(newX, newY);
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if (that.animating) that.aniTime = nextFrame(animate);
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};
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animate();
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},
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_transitionTime: function (time) {
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this.scroller.style[vendor + 'TransitionDuration'] = time + 'ms';
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},
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_momentum: function (dist, time, maxDistUpper, maxDistLower, size) {
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var deceleration = 0.0006,
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speed = m.abs(dist) / time,
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newDist = (speed * speed) / (2 * deceleration),
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newTime = 0, outsideDist = 0;
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// Proportinally reduce speed if we are outside of the boundaries
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if (dist > 0 && newDist > maxDistUpper) {
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outsideDist = size / (6 / (newDist / speed * deceleration));
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maxDistUpper = maxDistUpper + outsideDist;
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speed = speed * maxDistUpper / newDist;
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newDist = maxDistUpper;
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} else if (dist < 0 && newDist > maxDistLower) {
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outsideDist = size / (6 / (newDist / speed * deceleration));
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maxDistLower = maxDistLower + outsideDist;
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speed = speed * maxDistLower / newDist;
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newDist = maxDistLower;
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}
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newDist = newDist * (dist < 0 ? -1 : 1);
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newTime = speed / deceleration;
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return { dist: newDist, time: mround(newTime) };
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},
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_offset: function (el) {
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var left = -el.offsetLeft,
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top = -el.offsetTop;
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while (el = el.offsetParent) {
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left -= el.offsetLeft;
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top -= el.offsetTop;
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}
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return { left: left, top: top };
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},
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_bind: function (type, el, bubble) {
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(el || this.scroller).addEventListener(type, this, !!bubble);
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},
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_unbind: function (type, el, bubble) {
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(el || this.scroller).removeEventListener(type, this, !!bubble);
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},
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/**
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*
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* Public methods
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*
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*/
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destroy: function () {
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var that = this;
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that.scroller.style[vendor + 'Transform'] = '';
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// Remove the event listeners
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that._unbind(RESIZE_EV, window);
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that._unbind(START_EV);
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that._unbind(MOVE_EV);
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that._unbind(END_EV);
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that._unbind(CANCEL_EV);
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that._unbind('mouseout', that.wrapper);
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if (that.options.useTransition) that._unbind('webkitTransitionEnd');
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if (that.options.onDestroy) that.options.onDestroy.call(that);
|
|
},
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|
|
|
refresh: function () {
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|
var that = this,
|
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offset;
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|
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|
that.wrapperW = that.wrapper.clientWidth;
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|
that.wrapperH = that.wrapper.clientHeight;
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|
|
|
that.scrollerW = that.scroller.offsetWidth;
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|
that.scrollerH = that.scroller.offsetHeight;
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|
that.maxScrollX = that.wrapperW - that.scrollerW;
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|
that.maxScrollY = that.wrapperH - that.scrollerH;
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|
that.dirX = 0;
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|
that.dirY = 0;
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|
|
|
that.hScroll = that.options.hScroll && that.maxScrollX < 0;
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|
that.vScroll = that.options.vScroll && (!that.options.bounceLock && !that.hScroll || that.scrollerH > that.wrapperH);
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|
|
|
offset = that._offset(that.wrapper);
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|
that.wrapperOffsetLeft = -offset.left;
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|
that.wrapperOffsetTop = -offset.top;
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|
|
|
|
|
that.scroller.style[vendor + 'TransitionDuration'] = '0';
|
|
|
|
that._resetPos(200);
|
|
},
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|
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|
scrollTo: function (x, y, time, relative) {
|
|
var that = this,
|
|
step = x,
|
|
i, l;
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|
|
|
that.stop();
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|
|
|
if (!step.length) step = [{ x: x, y: y, time: time, relative: relative }];
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|
|
|
for (i=0, l=step.length; i<l; i++) {
|
|
if (step[i].relative) { step[i].x = that.x - step[i].x; step[i].y = that.y - step[i].y; }
|
|
that.steps.push({ x: step[i].x, y: step[i].y, time: step[i].time || 0 });
|
|
}
|
|
|
|
that._startAni();
|
|
},
|
|
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|
scrollToElement: function (el, time) {
|
|
var that = this, pos;
|
|
el = el.nodeType ? el : that.scroller.querySelector(el);
|
|
if (!el) return;
|
|
|
|
pos = that._offset(el);
|
|
pos.left += that.wrapperOffsetLeft;
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|
pos.top += that.wrapperOffsetTop;
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|
|
|
pos.left = pos.left > 0 ? 0 : pos.left < that.maxScrollX ? that.maxScrollX : pos.left;
|
|
pos.top = pos.top > 0 ? 0 : pos.top < that.maxScrollY ? that.maxScrollY : pos.top;
|
|
time = time === undefined ? m.max(m.abs(pos.left)*2, m.abs(pos.top)*2) : time;
|
|
|
|
that.scrollTo(pos.left, pos.top, time);
|
|
},
|
|
|
|
disable: function () {
|
|
this.stop();
|
|
this._resetPos(0);
|
|
this.enabled = false;
|
|
|
|
// If disabled after touchstart we make sure that there are no left over events
|
|
this._unbind(MOVE_EV);
|
|
this._unbind(END_EV);
|
|
this._unbind(CANCEL_EV);
|
|
},
|
|
|
|
enable: function () {
|
|
this.enabled = true;
|
|
},
|
|
|
|
stop: function () {
|
|
cancelFrame(this.aniTime);
|
|
this.steps = [];
|
|
this.moved = false;
|
|
this.animating = false;
|
|
}
|
|
};
|
|
|
|
if (typeof exports !== 'undefined') exports.iScroll = iScroll;
|
|
else window.iScroll = iScroll;
|
|
|
|
})();
|