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725 lines
19 KiB
JavaScript
Executable File
725 lines
19 KiB
JavaScript
Executable File
/**
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*
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* Find more about the scrolling function at
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* http://cubiq.org/iscroll
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*
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* Copyright (c) 2010 Matteo Spinelli, http://cubiq.org/
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* Released under MIT license
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* http://cubiq.org/dropbox/mit-license.txt
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*
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* Version 3.7.1 - Last updated: 2010.10.08
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*
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*/
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(function(){
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function iScroll (el, options) {
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var that = this, i;
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that.element = typeof el == 'object' ? el : document.getElementById(el);
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that.wrapper = that.element.parentNode;
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that.element.style.webkitTransitionProperty = '-webkit-transform';
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that.element.style.webkitTransitionTimingFunction = 'cubic-bezier(0,0,0.25,1)';
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that.element.style.webkitTransitionDuration = '0';
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that.element.style.webkitTransform = translateOpen + '0,0' + translateClose;
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// Default options
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that.options = {
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bounce: has3d,
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momentum: has3d,
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checkDOMChanges: true,
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topOnDOMChanges: false,
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hScrollbar: has3d,
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|
vScrollbar: has3d,
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fadeScrollbar: isIthing || !isTouch,
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shrinkScrollbar: isIthing || !isTouch,
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desktopCompatibility: false,
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overflow: 'auto',
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snap: false,
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bounceLock: false,
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scrollbarColor: 'rgba(0,0,0,0.5)',
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onScrollEnd: function () {}
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};
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// User defined options
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if (typeof options == 'object') {
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for (i in options) {
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that.options[i] = options[i];
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}
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}
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if (that.options.desktopCompatibility) {
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that.options.overflow = 'hidden';
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}
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that.onScrollEnd = that.options.onScrollEnd;
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delete that.options.onScrollEnd;
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that.wrapper.style.overflow = that.options.overflow;
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that.refresh();
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window.addEventListener('onorientationchange' in window ? 'orientationchange' : 'resize', that, false);
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if (isTouch || that.options.desktopCompatibility) {
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that.element.addEventListener(START_EVENT, that, false);
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that.element.addEventListener(MOVE_EVENT, that, false);
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that.element.addEventListener(END_EVENT, that, false);
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}
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if (that.options.checkDOMChanges) {
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that.element.addEventListener('DOMSubtreeModified', that, false);
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}
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}
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iScroll.prototype = {
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x: 0,
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y: 0,
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enabled: true,
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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_EVENT:
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that.touchStart(e);
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break;
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case MOVE_EVENT:
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that.touchMove(e);
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break;
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case END_EVENT:
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that.touchEnd(e);
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break;
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case 'webkitTransitionEnd':
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that.transitionEnd();
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break;
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case 'orientationchange':
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case 'resize':
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that.refresh();
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break;
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case 'DOMSubtreeModified':
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that.onDOMModified(e);
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break;
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}
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},
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onDOMModified: function (e) {
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var that = this;
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// (Hopefully) execute onDOMModified only once
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if (e.target.parentNode != that.element) {
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return;
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}
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setTimeout(function () { that.refresh(); }, 0);
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if (that.options.topOnDOMChanges && (that.x!=0 || that.y!=0)) {
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that.scrollTo(0,0,'0');
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}
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},
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refresh: function () {
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var that = this,
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resetX = that.x, resetY = that.y,
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snap;
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that.scrollWidth = that.wrapper.clientWidth;
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that.scrollHeight = that.wrapper.clientHeight;
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that.scrollerWidth = that.element.offsetWidth;
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that.scrollerHeight = that.element.offsetHeight;
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that.maxScrollX = that.scrollWidth - that.scrollerWidth;
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that.maxScrollY = that.scrollHeight - that.scrollerHeight;
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that.directionX = 0;
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that.directionY = 0;
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if (that.scrollX) {
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if (that.maxScrollX >= 0) {
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resetX = 0;
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} else if (that.x < that.maxScrollX) {
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resetX = that.maxScrollX;
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}
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}
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if (that.scrollY) {
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if (that.maxScrollY >= 0) {
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resetY = 0;
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} else if (that.y < that.maxScrollY) {
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resetY = that.maxScrollY;
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}
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}
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// Snap
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if (that.options.snap) {
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that.maxPageX = -Math.floor(that.maxScrollX/that.scrollWidth);
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that.maxPageY = -Math.floor(that.maxScrollY/that.scrollHeight);
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snap = that.snap(resetX, resetY);
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resetX = snap.x;
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resetY = snap.y;
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}
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if (resetX!=that.x || resetY!=that.y) {
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that.setTransitionTime('0');
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that.setPosition(resetX, resetY, true);
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}
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that.scrollX = that.scrollerWidth > that.scrollWidth;
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that.scrollY = !that.options.bounceLock && !that.scrollX || that.scrollerHeight > that.scrollHeight;
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// Update horizontal scrollbar
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if (that.options.hScrollbar && that.scrollX) {
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that.scrollBarX = that.scrollBarX || new scrollbar('horizontal', that.wrapper, that.options.fadeScrollbar, that.options.shrinkScrollbar, that.options.scrollbarColor);
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that.scrollBarX.init(that.scrollWidth, that.scrollerWidth);
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} else if (that.scrollBarX) {
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that.scrollBarX = that.scrollBarX.remove();
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}
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// Update vertical scrollbar
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if (that.options.vScrollbar && that.scrollY && that.scrollerHeight > that.scrollHeight) {
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that.scrollBarY = that.scrollBarY || new scrollbar('vertical', that.wrapper, that.options.fadeScrollbar, that.options.shrinkScrollbar, that.options.scrollbarColor);
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that.scrollBarY.init(that.scrollHeight, that.scrollerHeight);
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} else if (that.scrollBarY) {
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that.scrollBarY = that.scrollBarY.remove();
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}
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},
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setPosition: function (x, y, hideScrollBars) {
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var that = this;
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that.x = x;
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that.y = y;
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that.element.style.webkitTransform = translateOpen + that.x + 'px,' + that.y + 'px' + translateClose;
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// Move the scrollbars
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if (!hideScrollBars) {
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if (that.scrollBarX) {
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that.scrollBarX.setPosition(that.x);
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}
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if (that.scrollBarY) {
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that.scrollBarY.setPosition(that.y);
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}
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}
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},
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setTransitionTime: function(time) {
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var that = this;
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time = time || '0';
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that.element.style.webkitTransitionDuration = time;
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if (that.scrollBarX) {
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that.scrollBarX.bar.style.webkitTransitionDuration = time;
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that.scrollBarX.wrapper.style.webkitTransitionDuration = has3d && that.options.fadeScrollbar ? '300ms' : '0';
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}
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if (that.scrollBarY) {
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that.scrollBarY.bar.style.webkitTransitionDuration = time;
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that.scrollBarY.wrapper.style.webkitTransitionDuration = has3d && that.options.fadeScrollbar ? '300ms' : '0';
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}
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},
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touchStart: function(e) {
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var that = this,
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matrix;
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if (!that.enabled) {
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return;
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}
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e.preventDefault();
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e.stopPropagation();
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that.scrolling = true; // This is probably not needed, but may be useful if iScroll is used in conjuction with other frameworks
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that.moved = false;
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that.distX = 0;
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that.distY = 0;
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that.setTransitionTime('0');
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// Check if the scroller is really where it should be
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if (that.options.momentum || that.options.snap) {
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matrix = new WebKitCSSMatrix(window.getComputedStyle(that.element).webkitTransform);
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if (matrix.e != that.x || matrix.f != that.y) {
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document.removeEventListener('webkitTransitionEnd', that, false);
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that.setPosition(matrix.e, matrix.f);
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that.moved = true;
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}
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}
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that.touchStartX = isTouch ? e.changedTouches[0].pageX : e.pageX;
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that.scrollStartX = that.x;
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that.touchStartY = isTouch ? e.changedTouches[0].pageY : e.pageY;
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that.scrollStartY = that.y;
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that.scrollStartTime = e.timeStamp;
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that.directionX = 0;
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that.directionY = 0;
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},
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touchMove: function(e) {
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if (!this.scrolling) {
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return;
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}
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var that = this,
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pageX = isTouch ? e.changedTouches[0].pageX : e.pageX,
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pageY = isTouch ? e.changedTouches[0].pageY : e.pageY,
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leftDelta = that.scrollX ? pageX - that.touchStartX : 0,
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topDelta = that.scrollY ? pageY - that.touchStartY : 0,
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newX = that.x + leftDelta,
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newY = that.y + topDelta;
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//e.preventDefault();
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e.stopPropagation(); // Stopping propagation just saves some cpu cycles (I presume)
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that.touchStartX = pageX;
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that.touchStartY = 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 ? Math.round(that.x + leftDelta / 3) : (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 ? Math.round(that.y + topDelta / 3) : (newY >= 0 || that.maxScrollY>=0) ? 0 : that.maxScrollY;
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}
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if (that.distX + that.distY > 5) { // 5 pixels threshold
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// Lock scroll direction
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if (that.distX-3 > that.distY) {
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newY = that.y;
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topDelta = 0;
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} else if (that.distY-3 > that.distX) {
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newX = that.x;
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leftDelta = 0;
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}
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that.setPosition(newX, newY);
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that.moved = true;
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that.directionX = leftDelta > 0 ? -1 : 1;
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that.directionY = topDelta > 0 ? -1 : 1;
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} else {
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that.distX+= Math.abs(leftDelta);
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that.distY+= Math.abs(topDelta);
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// that.dist+= Math.abs(leftDelta) + Math.abs(topDelta);
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}
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},
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touchEnd: function(e) {
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if (!this.scrolling) {
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return;
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}
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var that = this,
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time = e.timeStamp - that.scrollStartTime,
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point = isTouch ? e.changedTouches[0] : e,
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target, ev,
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momentumX, momentumY,
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newDuration = 0,
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newPositionX = that.x, newPositionY = that.y,
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snap;
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that.scrolling = false;
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if (!that.moved) {
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that.resetPosition();
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if (isTouch) {
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// Find the last touched element
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target = point.target;
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while (target.nodeType != 1) {
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target = target.parentNode;
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}
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// Create the fake event
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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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return;
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}
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if (!that.options.snap && time > 250) { // Prevent slingshot effect
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that.resetPosition();
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return;
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}
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if (that.options.momentum) {
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momentumX = that.scrollX === true
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? that.momentum(that.x - that.scrollStartX,
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time,
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that.options.bounce ? -that.x + that.scrollWidth/5 : -that.x,
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that.options.bounce ? that.x + that.scrollerWidth - that.scrollWidth + that.scrollWidth/5 : that.x + that.scrollerWidth - that.scrollWidth)
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: { dist: 0, time: 0 };
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momentumY = that.scrollY === true
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? that.momentum(that.y - that.scrollStartY,
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time,
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that.options.bounce ? -that.y + that.scrollHeight/5 : -that.y,
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that.options.bounce ? (that.maxScrollY < 0 ? that.y + that.scrollerHeight - that.scrollHeight : 0) + that.scrollHeight/5 : that.y + that.scrollerHeight - that.scrollHeight)
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: { dist: 0, time: 0 };
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newDuration = Math.max(Math.max(momentumX.time, momentumY.time), 1); // The minimum animation length must be 1ms
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newPositionX = that.x + momentumX.dist;
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newPositionY = that.y + momentumY.dist;
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}
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if (that.options.snap) {
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snap = that.snap(newPositionX, newPositionY);
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newPositionX = snap.x;
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newPositionY = snap.y;
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newDuration = Math.max(snap.time, newDuration);
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}
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that.scrollTo(newPositionX, newPositionY, newDuration + 'ms');
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},
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transitionEnd: function () {
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var that = this;
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document.removeEventListener('webkitTransitionEnd', that, false);
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that.resetPosition();
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},
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resetPosition: function () {
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var that = this,
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resetX = that.x,
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resetY = that.y;
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if (that.x >= 0) {
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resetX = 0;
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} else if (that.x < that.maxScrollX) {
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resetX = that.maxScrollX;
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}
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if (that.y >= 0 || that.maxScrollY > 0) {
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resetY = 0;
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} else if (that.y < that.maxScrollY) {
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resetY = that.maxScrollY;
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}
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if (resetX != that.x || resetY != that.y) {
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that.scrollTo(resetX, resetY);
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} else {
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if (that.moved) {
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that.onScrollEnd(); // Execute custom code on scroll end
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that.moved = false;
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}
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// Hide the scrollbars
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if (that.scrollBarX) {
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that.scrollBarX.hide();
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}
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if (that.scrollBarY) {
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that.scrollBarY.hide();
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}
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}
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},
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snap: function (x, y) {
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var that = this, time;
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if (that.directionX > 0) {
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x = Math.floor(x/that.scrollWidth);
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} else if (that.directionX < 0) {
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x = Math.ceil(x/that.scrollWidth);
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} else {
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x = Math.round(x/that.scrollWidth);
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}
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that.pageX = -x;
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x = x * that.scrollWidth;
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if (x > 0) {
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x = that.pageX = 0;
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} else if (x < that.maxScrollX) {
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that.pageX = that.maxPageX;
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x = that.maxScrollX;
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}
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if (that.directionY > 0) {
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y = Math.floor(y/that.scrollHeight);
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} else if (that.directionY < 0) {
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y = Math.ceil(y/that.scrollHeight);
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} else {
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y = Math.round(y/that.scrollHeight);
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}
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that.pageY = -y;
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y = y * that.scrollHeight;
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if (y > 0) {
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y = that.pageY = 0;
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} else if (y < that.maxScrollY) {
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that.pageY = that.maxPageY;
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y = that.maxScrollY;
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}
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// Snap with constant speed (proportional duration)
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time = Math.round(Math.max(
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Math.abs(that.x - x) / that.scrollWidth * 500,
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Math.abs(that.y - y) / that.scrollHeight * 500
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));
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return { x: x, y: y, time: time };
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},
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scrollTo: function (destX, destY, runtime) {
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var that = this;
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if (that.x == destX && that.y == destY) {
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that.resetPosition();
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return;
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}
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that.moved = true;
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that.setTransitionTime(runtime || '350ms');
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that.setPosition(destX, destY);
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if (runtime==='0' || runtime=='0s' || runtime=='0ms') {
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that.resetPosition();
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} else {
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document.addEventListener('webkitTransitionEnd', that, false); // At the end of the transition check if we are still inside of the boundaries
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}
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},
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scrollToPage: function (pageX, pageY, runtime) {
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var that = this, snap;
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if (!that.options.snap) {
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that.pageX = -Math.round(that.x / that.scrollWidth);
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that.pageY = -Math.round(that.y / that.scrollHeight);
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}
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if (pageX == 'next') {
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pageX = ++that.pageX;
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} else if (pageX == 'prev') {
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pageX = --that.pageX;
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}
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if (pageY == 'next') {
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pageY = ++that.pageY;
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} else if (pageY == 'prev') {
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pageY = --that.pageY;
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}
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pageX = -pageX*that.scrollWidth;
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pageY = -pageY*that.scrollHeight;
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snap = that.snap(pageX, pageY);
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pageX = snap.x;
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pageY = snap.y;
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that.scrollTo(pageX, pageY, runtime || '500ms');
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},
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scrollToElement: function (el, runtime) {
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el = typeof el == 'object' ? el : this.element.querySelector(el);
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if (!el) {
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return;
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}
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var that = this,
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x = that.scrollX ? -el.offsetLeft : 0,
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y = that.scrollY ? -el.offsetTop : 0;
|
|
|
|
if (x >= 0) {
|
|
x = 0;
|
|
} else if (x < that.maxScrollX) {
|
|
x = that.maxScrollX;
|
|
}
|
|
|
|
if (y >= 0) {
|
|
y = 0;
|
|
} else if (y < that.maxScrollY) {
|
|
y = that.maxScrollY;
|
|
}
|
|
|
|
that.scrollTo(x, y, runtime);
|
|
},
|
|
|
|
momentum: function (dist, time, maxDistUpper, maxDistLower) {
|
|
var friction = 2.5,
|
|
deceleration = 1.2,
|
|
speed = Math.abs(dist) / time * 1000,
|
|
newDist = speed * speed / friction / 1000,
|
|
newTime = 0;
|
|
|
|
// Proportinally reduce speed if we are outside of the boundaries
|
|
if (dist > 0 && newDist > maxDistUpper) {
|
|
speed = speed * maxDistUpper / newDist / friction;
|
|
newDist = maxDistUpper;
|
|
} else if (dist < 0 && newDist > maxDistLower) {
|
|
speed = speed * maxDistLower / newDist / friction;
|
|
newDist = maxDistLower;
|
|
}
|
|
|
|
newDist = newDist * (dist < 0 ? -1 : 1);
|
|
newTime = speed / deceleration;
|
|
|
|
return { dist: Math.round(newDist), time: Math.round(newTime) };
|
|
},
|
|
|
|
destroy: function (full) {
|
|
var that = this;
|
|
|
|
window.removeEventListener('onorientationchange' in window ? 'orientationchange' : 'resize', that, false);
|
|
that.element.removeEventListener(START_EVENT, that, false);
|
|
that.element.removeEventListener(MOVE_EVENT, that, false);
|
|
that.element.removeEventListener(END_EVENT, that, false);
|
|
document.removeEventListener('webkitTransitionEnd', that, false);
|
|
|
|
if (that.options.checkDOMChanges) {
|
|
that.element.removeEventListener('DOMSubtreeModified', that, false);
|
|
}
|
|
|
|
if (that.scrollBarX) {
|
|
that.scrollBarX = that.scrollBarX.remove();
|
|
}
|
|
|
|
if (that.scrollBarY) {
|
|
that.scrollBarY = that.scrollBarY.remove();
|
|
}
|
|
|
|
if (full) {
|
|
that.wrapper.parentNode.removeChild(that.wrapper);
|
|
}
|
|
|
|
return null;
|
|
}
|
|
};
|
|
|
|
function scrollbar (dir, wrapper, fade, shrink, color) {
|
|
var that = this,
|
|
doc = document;
|
|
|
|
that.dir = dir;
|
|
that.fade = fade;
|
|
that.shrink = shrink;
|
|
that.uid = ++uid;
|
|
|
|
// Create main scrollbar
|
|
that.bar = doc.createElement('div');
|
|
|
|
that.bar.style.cssText = 'position:absolute;top:0;left:0;-webkit-transition-timing-function:cubic-bezier(0,0,0.25,1);pointer-events:none;-webkit-transition-duration:0;-webkit-transition-delay:0;-webkit-transition-property:-webkit-transform;z-index:10;background:' + color + ';' +
|
|
'-webkit-transform:' + translateOpen + '0,0' + translateClose + ';' +
|
|
(dir == 'horizontal' ? '-webkit-border-radius:3px 2px;min-width:6px;min-height:5px' : '-webkit-border-radius:2px 3px;min-width:5px;min-height:6px');
|
|
|
|
// Create scrollbar wrapper
|
|
that.wrapper = doc.createElement('div');
|
|
that.wrapper.style.cssText = '-webkit-mask:-webkit-canvas(scrollbar' + that.uid + that.dir + ');position:absolute;z-index:10;pointer-events:none;overflow:hidden;opacity:0;-webkit-transition-duration:' + (fade ? '300ms' : '0') + ';-webkit-transition-delay:0;-webkit-transition-property:opacity;' +
|
|
(that.dir == 'horizontal' ? 'bottom:2px;left:2px;right:7px;height:5px' : 'top:2px;right:2px;bottom:7px;width:5px;');
|
|
|
|
// Add scrollbar to the DOM
|
|
that.wrapper.appendChild(that.bar);
|
|
wrapper.appendChild(that.wrapper);
|
|
}
|
|
|
|
scrollbar.prototype = {
|
|
init: function (scroll, size) {
|
|
var that = this,
|
|
doc = document,
|
|
pi = Math.PI,
|
|
ctx;
|
|
|
|
// Create scrollbar mask
|
|
if (that.dir == 'horizontal') {
|
|
if (that.maxSize != that.wrapper.offsetWidth) {
|
|
that.maxSize = that.wrapper.offsetWidth;
|
|
ctx = doc.getCSSCanvasContext("2d", "scrollbar" + that.uid + that.dir, that.maxSize, 5);
|
|
ctx.fillStyle = "rgb(0,0,0)";
|
|
ctx.beginPath();
|
|
ctx.arc(2.5, 2.5, 2.5, pi/2, -pi/2, false);
|
|
ctx.lineTo(that.maxSize-2.5, 0);
|
|
ctx.arc(that.maxSize-2.5, 2.5, 2.5, -pi/2, pi/2, false);
|
|
ctx.closePath();
|
|
ctx.fill();
|
|
}
|
|
} else {
|
|
if (that.maxSize != that.wrapper.offsetHeight) {
|
|
that.maxSize = that.wrapper.offsetHeight;
|
|
ctx = doc.getCSSCanvasContext("2d", "scrollbar" + that.uid + that.dir, 5, that.maxSize);
|
|
ctx.fillStyle = "rgb(0,0,0)";
|
|
ctx.beginPath();
|
|
ctx.arc(2.5, 2.5, 2.5, pi, 0, false);
|
|
ctx.lineTo(5, that.maxSize-2.5);
|
|
ctx.arc(2.5, that.maxSize-2.5, 2.5, 0, pi, false);
|
|
ctx.closePath();
|
|
ctx.fill();
|
|
}
|
|
}
|
|
|
|
that.size = Math.max(Math.round(that.maxSize * that.maxSize / size), 6);
|
|
that.maxScroll = that.maxSize - that.size;
|
|
that.toWrapperProp = that.maxScroll / (scroll - size);
|
|
that.bar.style[that.dir == 'horizontal' ? 'width' : 'height'] = that.size + 'px';
|
|
},
|
|
|
|
setPosition: function (pos) {
|
|
var that = this;
|
|
|
|
if (that.wrapper.style.opacity != '1') {
|
|
that.show();
|
|
}
|
|
|
|
pos = Math.round(that.toWrapperProp * pos);
|
|
|
|
if (pos < 0) {
|
|
pos = that.shrink ? pos + pos*3 : 0;
|
|
if (that.size + pos < 7) {
|
|
pos = -that.size + 6;
|
|
}
|
|
} else if (pos > that.maxScroll) {
|
|
pos = that.shrink ? pos + (pos-that.maxScroll)*3 : that.maxScroll;
|
|
if (that.size + that.maxScroll - pos < 7) {
|
|
pos = that.size + that.maxScroll - 6;
|
|
}
|
|
}
|
|
|
|
pos = that.dir == 'horizontal'
|
|
? translateOpen + pos + 'px,0' + translateClose
|
|
: translateOpen + '0,' + pos + 'px' + translateClose;
|
|
|
|
that.bar.style.webkitTransform = pos;
|
|
},
|
|
|
|
show: function () {
|
|
if (has3d) {
|
|
this.wrapper.style.webkitTransitionDelay = '0';
|
|
}
|
|
this.wrapper.style.opacity = '1';
|
|
},
|
|
|
|
hide: function () {
|
|
if (has3d) {
|
|
this.wrapper.style.webkitTransitionDelay = '350ms';
|
|
}
|
|
this.wrapper.style.opacity = '0';
|
|
},
|
|
|
|
remove: function () {
|
|
this.wrapper.parentNode.removeChild(this.wrapper);
|
|
return null;
|
|
}
|
|
};
|
|
|
|
// Is translate3d compatible?
|
|
var has3d = ('WebKitCSSMatrix' in window && 'm11' in new WebKitCSSMatrix()),
|
|
// Device sniffing
|
|
isIthing = (/iphone|ipad/gi).test(navigator.appVersion),
|
|
isTouch = ('ontouchstart' in window),
|
|
// Event sniffing
|
|
START_EVENT = isTouch ? 'touchstart' : 'mousedown',
|
|
MOVE_EVENT = isTouch ? 'touchmove' : 'mousemove',
|
|
END_EVENT = isTouch ? 'touchend' : 'mouseup',
|
|
// Translate3d helper
|
|
translateOpen = 'translate' + (has3d ? '3d(' : '('),
|
|
translateClose = has3d ? ',0)' : ')',
|
|
// Unique ID
|
|
uid = 0;
|
|
|
|
// Expose iScroll to the world
|
|
window.iScroll = iScroll;
|
|
})(); |