/src/iscroll.js
JavaScript | 1049 lines | 786 code | 190 blank | 73 comment | 254 complexity | 5362eba55798e45bdd7713ab8193755c MD5 | raw file
Possible License(s): JSON
- /**
- *
- * * * * * * * * * * * * * * * * * * * * * * * * * * * *
- * iScroll v4.0 Beta 4
- * * * * * * * * * * * * * * * * * * * * * * * * * * * *
- *
- * Copyright (c) 2010 Matteo Spinelli, http://cubiq.org/
- * Released under MIT license
- * http://cubiq.org/dropbox/mit-license.txt
- *
- * Last updated: 2011.03.10
- *
- * * * * * * * * * * * * * * * * * * * * * * * * * * * *
- *
- */
- (function(){
- function iScroll (el, options) {
- var that = this, doc = document, div, i;
- that.wrapper = typeof el == 'object' ? el : doc.getElementById(el);
- that.wrapper.style.overflow = 'hidden';
- that.scroller = that.wrapper.children[0];
- // Default options
- that.options = {
- HWTransition: true, // Experimental, internal use only
- HWCompositing: true, // Experimental, internal use only
- hScroll: true,
- vScroll: true,
- hScrollbar: true,
- vScrollbar: true,
- fixedScrollbar: isAndroid,
- fadeScrollbar: (isIDevice && has3d) || !hasTouch,
- hideScrollbar: isIDevice || !hasTouch,
- scrollbarClass: '',
- bounce: has3d,
- bounceLock: false,
- momentum: has3d,
- lockDirection: true,
- zoom: false,
- zoomMin: 1,
- zoomMax: 4,
- snap: false,
- pullToRefresh: false,
- pullDownLabel: ['Pull down to refresh...', 'Release to refresh...', 'Loading...'],
- pullUpLabel: ['Pull up to refresh...', 'Release to refresh...', 'Loading...'],
- onPullDown: function () {},
- onPullUp: function () {},
- onScrollStart: null,
- onScrollEnd: null,
- onZoomStart: null,
- onZoomEnd: null,
- checkDOMChange: false // Experimental
- };
- // User defined options
- for (i in options) {
- that.options[i] = options[i];
- }
- that.options.HWCompositing = that.options.HWCompositing && hasCompositing;
- that.options.HWTransition = that.options.HWTransition && hasCompositing;
- if (that.options.HWCompositing) {
- that.scroller.style.cssText += '-webkit-transition-property:-webkit-transform;-webkit-transform-origin:0 0;-webkit-transform:' + trnOpen + '0,0' + trnClose;
- } else {
- that.scroller.style.cssText += '-webkit-transition-property:top,left;-webkit-transform-origin:0 0;top:0;left:0';
- }
- if (that.options.HWTransition) {
- that.scroller.style.cssText += '-webkit-transition-timing-function:cubic-bezier(0.33,0.66,0.66,1);-webkit-transition-duration:0;';
- }
- that.options.hScrollbar = that.options.hScroll && that.options.hScrollbar;
- that.options.vScrollbar = that.options.vScroll && that.options.vScrollbar;
-
- that.pullDownToRefresh = that.options.pullToRefresh == 'down' || that.options.pullToRefresh == 'both';
- that.pullUpToRefresh = that.options.pullToRefresh == 'up' || that.options.pullToRefresh == 'both';
-
- if (that.pullDownToRefresh) {
- div = doc.createElement('div');
- div.className = 'iScrollPullDown';
- div.innerHTML = '<span class="iScrollPullDownIcon"></span><span class="iScrollPullDownLabel">' + that.options.pullDownLabel[0] + '</span>\n';
- that.scroller.insertBefore(div, that.scroller.children[0]);
- that.options.bounce = true;
- that.pullDownEl = div;
- that.pullDownLabel = div.getElementsByTagName('span')[1];
- }
-
- if (that.pullUpToRefresh) {
- div = doc.createElement('div');
- div.className = 'iScrollPullUp';
- div.innerHTML = '<span class="iScrollPullUpIcon"></span><span class="iScrollPullUpLabel">' + that.options.pullUpLabel[0] + '</span>\n';
- that.scroller.appendChild(div);
- that.options.bounce = true;
- that.pullUpEl = div;
- that.pullUpLabel = div.getElementsByTagName('span')[1];
- }
- that.refresh();
- that._bind(RESIZE_EV, window);
- that._bind(START_EV);
- /* that._bind(MOVE_EV);
- that._bind(END_EV);
- that._bind(CANCEL_EV);*/
- if (hasGesture && that.options.zoom) {
- that._bind('gesturestart');
- that.scroller.style.webkitTransform = that.scroller.style.webkitTransform + ' scale(1)';
- }
-
- if (!hasTouch) {
- that._bind('mousewheel');
- }
-
- if (that.options.checkDOMChange) {
- that.DOMChangeInterval = setInterval(function () { that._checkSize(); }, 250);
- }
- }
- iScroll.prototype = {
- x: 0, y: 0,
- currPageX: 0, currPageY: 0,
- pagesX: [], pagesY: [],
- offsetBottom: 0,
- offsetTop: 0,
- scale: 1, lastScale: 1,
- contentReady: true,
-
- handleEvent: function (e) {
- var that = this;
- switch(e.type) {
- case START_EV: that._start(e); break;
- case MOVE_EV: that._move(e); break;
- case END_EV:
- case CANCEL_EV: that._end(e); break;
- case 'webkitTransitionEnd': that._transitionEnd(e); break;
- case RESIZE_EV: that._resize(); break;
- case 'gesturestart': that._gestStart(e); break;
- case 'gesturechange': that._gestChange(e); break;
- case 'gestureend':
- case 'gesturecancel': that._gestEnd(e); break;
- case 'mousewheel': that._wheel(e); break;
- }
- },
-
- _scrollbar: function (dir) {
- var that = this,
- doc = document,
- bar;
- if (!that[dir + 'Scrollbar']) {
- if (that[dir + 'ScrollbarWrapper']) {
- that[dir + 'ScrollbarIndicator'].style.webkitTransform = ''; // Should free some mem
- that[dir + 'ScrollbarWrapper'].parentNode.removeChild(that[dir + 'ScrollbarWrapper']);
- that[dir + 'ScrollbarWrapper'] = null;
- that[dir + 'ScrollbarIndicator'] = null;
- }
- return;
- }
- if (!that[dir + 'ScrollbarWrapper']) {
- // Create the scrollbar wrapper
- bar = doc.createElement('div');
- if (that.options.scrollbarClass) {
- bar.className = that.options.scrollbarClass + dir.toUpperCase();
- } else {
- bar.style.cssText = 'position:absolute;z-index:100;' + (dir == 'h' ? 'height:7px;bottom:1px;left:2px;right:7px' : 'width:7px;bottom:7px;top:2px;right:1px');
- }
- bar.style.cssText += 'pointer-events:none;-webkit-transition-property:opacity;-webkit-transition-duration:' + (that.options.fadeScrollbar ? '350ms' : '0') + ';overflow:hidden;opacity:' + (that.options.hideScrollbar ? '0' : '1');
- that.wrapper.appendChild(bar);
- that[dir + 'ScrollbarWrapper'] = bar;
- // Create the scrollbar indicator
- bar = doc.createElement('div');
- if (!that.options.scrollbarClass) {
- bar.style.cssText = 'position:absolute;z-index:100;background:rgba(0,0,0,0.5);border:1px solid rgba(255,255,255,0.9);-webkit-background-clip:padding-box;-webkit-box-sizing:border-box;' + (dir == 'h' ? 'height:100%;-webkit-border-radius:4px 3px;' : 'width:100%;-webkit-border-radius:3px 4px;');
- }
- bar.style.cssText += 'pointer-events:none;-webkit-transition-property:-webkit-transform;-webkit-transition-timing-function:cubic-bezier(0.33,0.66,0.66,1);-webkit-transition-duration:0;-webkit-transform:' + trnOpen + '0,0' + trnClose;
- that[dir + 'ScrollbarWrapper'].appendChild(bar);
- that[dir + 'ScrollbarIndicator'] = bar;
- }
- if (dir == 'h') {
- that.hScrollbarSize = that.hScrollbarWrapper.clientWidth;
- that.hScrollbarIndicatorSize = m.max(m.round(that.hScrollbarSize * that.hScrollbarSize / that.scrollerW), 8);
- that.hScrollbarIndicator.style.width = that.hScrollbarIndicatorSize + 'px';
- that.hScrollbarMaxScroll = that.hScrollbarSize - that.hScrollbarIndicatorSize;
- that.hScrollbarProp = that.hScrollbarMaxScroll / that.maxScrollX;
- } else {
- that.vScrollbarSize = that.vScrollbarWrapper.clientHeight;
- that.vScrollbarIndicatorSize = m.max(m.round(that.vScrollbarSize * that.vScrollbarSize / that.scrollerH), 8);
- that.vScrollbarIndicator.style.height = that.vScrollbarIndicatorSize + 'px';
- that.vScrollbarMaxScroll = that.vScrollbarSize - that.vScrollbarIndicatorSize;
- that.vScrollbarProp = that.vScrollbarMaxScroll / that.maxScrollY;
- }
- // Reset position
- that._indicatorPos(dir, true);
- },
-
- _resize: function () {
- var that = this;
- //if (that.options.momentum) that._unbind('webkitTransitionEnd');
- setTimeout(function () {
- that.refresh();
- }, 0);
- },
-
- _checkSize: function () {
- var that = this,
- scrollerW,
- scrollerH;
- if (that.moved || that.zoomed || !that.contentReady) return;
- scrollerW = m.round(that.scroller.offsetWidth * that.scale),
- scrollerH = m.round((that.scroller.offsetHeight - that.offsetBottom - that.offsetTop) * that.scale);
- if (scrollerW == that.scrollerW && scrollerH == that.scrollerH) return;
- that.refresh();
- },
-
- _pos: function (x, y) {
- var that = this;
- that.x = that.hScroll ? x : 0;
- that.y = that.vScroll ? y : 0;
- that.scroller.style.webkitTransform = trnOpen + that.x + 'px,' + that.y + 'px' + trnClose + ' scale(' + that.scale + ')';
- // that.scroller.style.left = that.x + 'px';
- // that.scroller.style.top = that.y + 'px';
- that._indicatorPos('h');
- that._indicatorPos('v');
- },
-
- _indicatorPos: function (dir, hidden) {
- var that = this,
- pos = dir == 'h' ? that.x : that.y;
-
- if (!that[dir + 'Scrollbar']) return;
-
- pos = that[dir + 'ScrollbarProp'] * pos;
-
- if (pos < 0) {
- pos = that.options.fixedScrollbar ? 0 : pos + pos*3;
- if (that[dir + 'ScrollbarIndicatorSize'] + pos < 9) pos = -that[dir + 'ScrollbarIndicatorSize'] + 8;
- } else if (pos > that[dir + 'ScrollbarMaxScroll']) {
- pos = that.options.fixedScrollbar ? that[dir + 'ScrollbarMaxScroll'] : pos + (pos - that[dir + 'ScrollbarMaxScroll'])*3;
- if (that[dir + 'ScrollbarIndicatorSize'] + that[dir + 'ScrollbarMaxScroll'] - pos < 9) pos = that[dir + 'ScrollbarIndicatorSize'] + that[dir + 'ScrollbarMaxScroll'] - 8;
- }
- that[dir + 'ScrollbarWrapper'].style.webkitTransitionDelay = '0';
- that[dir + 'ScrollbarWrapper'].style.opacity = hidden && that.options.hideScrollbar ? '0' : '1';
- that[dir + 'ScrollbarIndicator'].style.webkitTransform = trnOpen + (dir == 'h' ? pos + 'px,0' : '0,' + pos + 'px') + trnClose;
- },
-
- _transitionTime: function (time) {
- var that = this;
-
- time += 'ms';
- that.scroller.style.webkitTransitionDuration = time;
- if (that.hScrollbar) that.hScrollbarIndicator.style.webkitTransitionDuration = time;
- if (that.vScrollbar) that.vScrollbarIndicator.style.webkitTransitionDuration = time;
- },
-
- _start: function (e) {
- var that = this,
- point = hasTouch ? e.changedTouches[0] : e,
- matrix;
- that.moved = false;
- e.preventDefault();
- if (hasTouch && e.touches.length == 2 && that.options.zoom && hasGesture && !that.zoomed) {
- that.originX = m.abs(e.touches[0].pageX + e.touches[1].pageX - that.wrapperOffsetLeft*2) / 2 - that.x;
- that.originY = m.abs(e.touches[0].pageY + e.touches[1].pageY - that.wrapperOffsetTop*2) / 2 - that.y;
- }
- that.moved = false;
- that.distX = 0;
- that.distY = 0;
- that.absDistX = 0;
- that.absDistY = 0;
- that.dirX = 0;
- that.dirY = 0;
- that.returnTime = 0;
-
- that._transitionTime(0);
-
- if (that.options.momentum) {
- if (that.scrollInterval) {
- clearInterval(that.scrollInterval);
- that.scrollInterval = null;
- }
- if (that.options.HWCompositing) {
- matrix = new WebKitCSSMatrix(window.getComputedStyle(that.scroller, null).webkitTransform);
- if (matrix.m41 != that.x || matrix.m42 != that.y) {
- that._unbind('webkitTransitionEnd');
- that._pos(matrix.m41, matrix.m42);
- }
- } else {
- matrix = window.getComputedStyle(that.scroller, null);
- if (that.x + 'px' != matrix.left || that.y + 'px' != matrix.top) {
- that._unbind('webkitTransitionEnd');
- that._pos(matrix.left.replace(/[^0-9]/g)*1, matrix.top.replace(/[^0-9]/g)*1);
- }
- }
-
- }
- that.scroller.style.webkitTransitionTimingFunction = 'cubic-bezier(0.33,0.66,0.66,1)';
- if (that.hScrollbar) that.hScrollbarIndicator.style.webkitTransitionTimingFunction = 'cubic-bezier(0.33,0.66,0.66,1)';
- if (that.vScrollbar) that.vScrollbarIndicator.style.webkitTransitionTimingFunction = 'cubic-bezier(0.33,0.66,0.66,1)';
- that.startX = that.x;
- that.startY = that.y;
- that.pointX = point.pageX;
- that.pointY = point.pageY;
-
- that.startTime = e.timeStamp;
- if (that.options.onScrollStart) that.options.onScrollStart.call(that);
- // Registering/unregistering of events is done to preserve resources on Android
- // setTimeout(function () {
- // that._unbind(START_EV);
- that._bind(MOVE_EV);
- that._bind(END_EV);
- that._bind(CANCEL_EV);
- // }, 0);
- },
-
- _move: function (e) {
- if (hasTouch && e.touches.length > 1) return;
- var that = this,
- point = hasTouch ? e.changedTouches[0] : e,
- deltaX = point.pageX - that.pointX,
- deltaY = point.pageY - that.pointY,
- newX = that.x + deltaX,
- newY = that.y + deltaY;
- e.preventDefault();
- that.pointX = point.pageX;
- that.pointY = point.pageY;
- // Slow down if outside of the boundaries
- if (newX > 0 || newX < that.maxScrollX) {
- newX = that.options.bounce ? that.x + (deltaX / 2.4) : newX >= 0 || that.maxScrollX >= 0 ? 0 : that.maxScrollX;
- }
- if (newY > 0 || newY < that.maxScrollY) {
- newY = that.options.bounce ? that.y + (deltaY / 2.4) : newY >= 0 || that.maxScrollY >= 0 ? 0 : that.maxScrollY;
- // Pull down to refresh
- if (that.options.pullToRefresh && that.contentReady) {
- if (that.pullDownToRefresh && newY > that.offsetBottom) {
- that.pullDownEl.className = 'iScrollPullDown flip';
- that.pullDownLabel.innerText = that.options.pullDownLabel[1];
- } else if (that.pullDownToRefresh && that.pullDownEl.className.match('flip')) {
- that.pullDownEl.className = 'iScrollPullDown';
- that.pullDownLabel.innerText = that.options.pullDownLabel[0];
- }
-
- if (that.pullUpToRefresh && newY < that.maxScrollY - that.offsetTop) {
- that.pullUpEl.className = 'iScrollPullUp flip';
- that.pullUpLabel.innerText = that.options.pullUpLabel[1];
- } else if (that.pullUpToRefresh && that.pullUpEl.className.match('flip')) {
- that.pullUpEl.className = 'iScrollPullUp';
- that.pullUpLabel.innerText = that.options.pullUpLabel[0];
- }
- }
- }
- if (that.absDistX < 4 && that.absDistY < 4) {
- that.distX += deltaX;
- that.distY += deltaY;
- that.absDistX = m.abs(that.distX);
- that.absDistY = m.abs(that.distY);
- return;
- }
-
- // Lock direction
- if (that.options.lockDirection) {
- if (that.absDistX > that.absDistY+3) {
- newY = that.y;
- deltaY = 0;
- } else if (that.absDistY > that.absDistX+3) {
- newX = that.x;
- deltaX = 0;
- }
- }
-
- that.moved = true;
- that._pos(newX, newY);
- that.dirX = deltaX > 0 ? -1 : deltaX < 0 ? 1 : 0;
- that.dirY = deltaY > 0 ? -1 : deltaY < 0 ? 1 : 0;
- if (e.timeStamp - that.startTime > 300) {
- that.startTime = e.timeStamp;
- that.startX = that.x;
- that.startY = that.y;
- }
- },
-
- _end: function (e) {
- if (hasTouch && e.touches.length != 0) return;
- var that = this,
- point = hasTouch ? e.changedTouches[0] : e,
- target, ev,
- momentumX = { dist:0, time:0 },
- momentumY = { dist:0, time:0 },
- duration = e.timeStamp - that.startTime,
- newPosX = that.x, newPosY = that.y,
- newDuration,
- snap;
- // that._bind(START_EV);
- that._unbind(MOVE_EV);
- that._unbind(END_EV);
- that._unbind(CANCEL_EV);
-
- if (that.zoomed) return;
- if (!that.moved) {
- if (hasTouch) {
- if (that.doubleTapTimer && that.options.zoom) {
- // Double tapped
- clearTimeout(that.doubleTapTimer);
- that.doubleTapTimer = null;
- that.zoom(that.pointX, that.pointY, that.scale == 1 ? 2 : 1);
- } else {
- that.doubleTapTimer = setTimeout(function () {
- that.doubleTapTimer = null;
- // Find the last touched element
- target = point.target;
- while (target.nodeType != 1) {
- target = target.parentNode;
- }
- ev = document.createEvent('MouseEvents');
- ev.initMouseEvent('click', true, true, e.view, 1,
- point.screenX, point.screenY, point.clientX, point.clientY,
- e.ctrlKey, e.altKey, e.shiftKey, e.metaKey,
- 0, null);
- ev._fake = true;
- target.dispatchEvent(ev);
- }, that.options.zoom ? 250 : 0);
- }
- }
- that._resetPos();
- return;
- }
- if (that.pullDownToRefresh && that.contentReady && that.pullDownEl.className.match('flip')) {
- that.pullDownEl.className = 'iScrollPullDown loading';
- that.pullDownLabel.innerText = that.options.pullDownLabel[2];
- that.scroller.style.marginTop = '0';
- that.offsetBottom = 0;
- that.refresh();
- that.contentReady = false;
- that.options.onPullDown();
- }
- if (that.pullUpToRefresh && that.contentReady && that.pullUpEl.className.match('flip')) {
- that.pullUpEl.className = 'iScrollPullUp loading';
- that.pullUpLabel.innerText = that.options.pullUpLabel[2];
- that.scroller.style.marginBottom = '0';
- that.offsetTop = 0;
- that.refresh();
- that.contentReady = false;
- that.options.onPullUp();
- }
- if (duration < 300 && that.options.momentum) {
- momentumX = newPosX ? that._momentum(newPosX - that.startX, duration, -that.x, that.scrollerW - that.wrapperW + that.x, that.options.bounce ? that.wrapperW : 0) : momentumX;
- 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;
- newPosX = that.x + momentumX.dist;
- newPosY = that.y + momentumY.dist;
- if ((that.x > 0 && newPosX > 0) || (that.x < that.maxScrollX && newPosX < that.maxScrollX)) momentumX = { dist:0, time:0 };
- if ((that.y > 0 && newPosY > 0) || (that.y < that.maxScrollY && newPosY < that.maxScrollY)) momentumY = { dist:0, time:0 };
- }
- if (momentumX.dist || momentumY.dist) {
- newDuration = m.max(m.max(momentumX.time, momentumY.time), 10);
- // Do we need to snap?
- if (that.options.snap) {
- snap = that._snap(newPosX, newPosY);
- newPosX = snap.x;
- newPosY = snap.y;
- newDuration = m.max(snap.time, newDuration);
- }
-
- /* if (newPosX > 0 || newPosX < that.maxScrollX || newPosY > 0 || newPosY < that.maxScrollY) {
- // Subtle change of scroller motion
- that.scroller.style.webkitTransitionTimingFunction = 'cubic-bezier(0.33,0.66,0.5,1)';
- if (that.hScrollbar) that.hScrollbarIndicator.style.webkitTransitionTimingFunction = 'cubic-bezier(0.33,0.66,0.5,1)';
- if (that.vScrollbar) that.vScrollbarIndicator.style.webkitTransitionTimingFunction = 'cubic-bezier(0.33,0.66,0.5,1)';
- }*/
- that.scrollTo(newPosX, newPosY, newDuration);
- return;
- }
-
- // Do we need to snap?
- if (that.options.snap) {
- snap = that._snap(that.x, that.y);
- if (snap.x != that.x || snap.y != that.y) {
- that.scrollTo(snap.x, snap.y, snap.time);
- }
- return;
- }
- that._resetPos();
- },
-
- _resetPos: function (time) {
- var that = this,
- resetX = that.x,
- resetY = that.y;
- if (that.x >= 0) resetX = 0;
- else if (that.x < that.maxScrollX) resetX = that.maxScrollX;
- if (that.y >= 0 || that.maxScrollY > 0) resetY = 0;
- else if (that.y < that.maxScrollY) resetY = that.maxScrollY;
- if (resetX == that.x && resetY == that.y) {
- if (that.moved) {
- if (that.options.onScrollEnd) that.options.onScrollEnd.call(that); // Execute custom code on scroll end
- that.moved = false;
- }
- if (that.zoomed) {
- if (that.options.onZoomEnd) that.options.onZoomEnd.call(that); // Execute custom code on scroll end
- that.zoomed = false;
- }
- if (that.hScrollbar && that.options.hideScrollbar) {
- that.hScrollbarWrapper.style.webkitTransitionDelay = '300ms';
- that.hScrollbarWrapper.style.opacity = '0';
- }
- if (that.vScrollbar && that.options.hideScrollbar) {
- that.vScrollbarWrapper.style.webkitTransitionDelay = '300ms';
- that.vScrollbarWrapper.style.opacity = '0';
- }
- return;
- }
- if (time === undefined) time = 200;
- // Invert ease
- if (time) {
- that.scroller.style.webkitTransitionTimingFunction = 'cubic-bezier(0.33,0.0,0.33,1)';
- if (that.hScrollbar) that.hScrollbarIndicator.style.webkitTransitionTimingFunction = 'cubic-bezier(0.33,0.0,0.33,1)';
- if (that.vScrollbar) that.vScrollbarIndicator.style.webkitTransitionTimingFunction = 'cubic-bezier(0.33,0.0,0.33,1)';
- }
- that.scrollTo(resetX, resetY, time);
- },
-
- _timedScroll: function (destX, destY, runtime) {
- var that = this,
- startX = that.x, startY = that.y,
- startTime = (new Date).getTime(),
- easeOut;
- that._transitionTime(0);
-
- if (that.scrollInterval) {
- clearInterval(that.scrollInterval);
- that.scrollInterval = null;
- }
-
- that.scrollInterval = setInterval(function () {
- var now = (new Date).getTime(),
- newX, newY;
-
- if (now >= startTime + runtime) {
- clearInterval(that.scrollInterval);
- that.scrollInterval = null;
- that._pos(destX, destY);
- that._transitionEnd();
- return;
- }
-
- now = (now - startTime) / runtime - 1;
- easeOut = m.sqrt(1 - now * now);
- newX = (destX - startX) * easeOut + startX;
- newY = (destY - startY) * easeOut + startY;
- that._pos(newX, newY);
- }, 20);
- },
-
- _transitionEnd: function (e) {
- var that = this;
-
- if (e) e.stopPropagation();
- that._unbind('webkitTransitionEnd');
- that._resetPos(that.returnTime);
- that.returnTime = 0;
- },
-
- /**
- *
- * Gestures
- *
- */
- _gestStart: function (e) {
- var that = this;
- that._transitionTime(0);
- that.lastScale = 1;
-
- if (that.options.onZoomStart) that.options.onZoomStart.call(that);
- that._unbind('gesturestart');
- that._bind('gesturechange');
- that._bind('gestureend');
- that._bind('gesturecancel');
- },
-
- _gestChange: function (e) {
- var that = this,
- scale = that.scale * e.scale,
- x, y, relScale;
- that.zoomed = true;
- if (scale < that.options.zoomMin) scale = that.options.zoomMin;
- else if (scale > that.options.zoomMax) scale = that.options.zoomMax;
- relScale = scale / that.scale;
- x = that.originX - that.originX * relScale + that.x;
- y = that.originY - that.originY * relScale + that.y;
- that.scroller.style.webkitTransform = trnOpen + x + 'px,' + y + 'px' + trnClose + ' scale(' + scale + ')';
- that.lastScale = relScale;
- },
- _gestEnd: function (e) {
- var that = this,
- scale = that.scale,
- lastScale = that.lastScale;
- that.scale = scale * lastScale;
- if (that.scale < that.options.zoomMin + 0.05) that.scale = that.options.zoomMin;
- else if (that.scale > that.options.zoomMax - 0.05) that.scale = that.options.zoomMax;
- lastScale = that.scale / scale;
- that.x = that.originX - that.originX * lastScale + that.x;
- that.y = that.originY - that.originY * lastScale + that.y;
- that.scroller.style.webkitTransform = trnOpen + that.x + 'px,' + that.y + 'px' + trnClose + ' scale(' + that.scale + ')';
- setTimeout(function () {
- that.refresh();
- }, 0);
- that._bind('gesturestart');
- that._unbind('gesturechange');
- that._unbind('gestureend');
- that._unbind('gesturecancel');
- },
-
- _wheel: function (e) {
- var that = this,
- deltaX = that.x + e.wheelDeltaX / 12,
- deltaY = that.y + e.wheelDeltaY / 12;
- if (deltaX > 0) deltaX = 0;
- else if (deltaX < that.maxScrollX) deltaX = that.maxScrollX;
- if (deltaY > 0) deltaY = 0;
- else if (deltaY < that.maxScrollY) deltaY = that.maxScrollY;
- that.scrollTo(deltaX, deltaY, 0);
- },
-
- /**
- *
- * Utilities
- *
- */
- _momentum: function (dist, time, maxDistUpper, maxDistLower, size) {
- var that = this,
- deceleration = 0.0006,
- speed = m.abs(dist) / time,
- newDist = (speed * speed) / (2 * deceleration),
- newTime = 0, outsideDist = 0;
- // Proportinally reduce speed if we are outside of the boundaries
- if (dist > 0 && newDist > maxDistUpper) {
- outsideDist = size / (6 / (newDist / speed * deceleration));
- maxDistUpper = maxDistUpper + outsideDist;
- that.returnTime = 800 / size * outsideDist + 100;
- speed = speed * maxDistUpper / newDist;
- newDist = maxDistUpper;
- } else if (dist < 0 && newDist > maxDistLower) {
- outsideDist = size / (6 / (newDist / speed * deceleration));
- maxDistLower = maxDistLower + outsideDist;
- that.returnTime = 800 / size * outsideDist + 100;
- speed = speed * maxDistLower / newDist;
- newDist = maxDistLower;
- }
- newDist = newDist * (dist < 0 ? -1 : 1);
- newTime = speed / deceleration;
- return { dist: newDist, time: m.round(newTime) };
- },
- _offset: function (el, tree) {
- var left = -el.offsetLeft,
- top = -el.offsetTop;
-
- if (!tree) return { x: left, y: top };
- while (el = el.offsetParent) {
- left -= el.offsetLeft;
- top -= el.offsetTop;
- }
- return { x: left, y: top };
- },
- _snap: function (x, y) {
- var that = this,
- i, l,
- page, time,
- sizeX, sizeY;
- // Check page X
- page = that.pagesX.length-1;
- for (i=0, l=that.pagesX.length; i<l; i++) {
- if (x >= that.pagesX[i]) {
- page = i;
- break;
- }
- }
- if (page == that.currPageX && page > 0 && that.dirX < 0) page--;
- x = that.pagesX[page];
- sizeX = m.abs(x - that.pagesX[that.currPageX]);
- sizeX = sizeX ? m.abs(that.x - x) / sizeX * 500 : 0;
- that.currPageX = page;
- // Check page Y
- page = that.pagesY.length-1;
- for (i=0; i<page; i++) {
- if (y >= that.pagesY[i]) {
- page = i;
- break;
- }
- }
- if (page == that.currPageY && page > 0 && that.dirY < 0) page--;
- y = that.pagesY[page];
- sizeY = m.abs(y - that.pagesY[that.currPageY]);
- sizeY = sizeY ? m.abs(that.y - y) / sizeY * 500 : 0;
- that.currPageY = page;
- // Snap with constant speed (proportional duration)
- time = m.round(m.max(sizeX, sizeY)) || 200;
- return { x: x, y: y, time: time };
- },
- _bind: function (type, el) {
- (el || this.scroller).addEventListener(type, this, false);
- },
- _unbind: function (type, el) {
- (el || this.scroller).removeEventListener(type, this, false);
- },
- /**
- *
- * Public methods
- *
- */
- destroy: function () {
- var that = this;
- if (that.options.checkDOMChange) clearTimeout(that.DOMChangeInterval);
- // Remove pull to refresh
- if (that.pullDownToRefresh) {
- that.pullDownEl.parentNode.removeChild(that.pullDownEl);
- }
- if (that.pullUpToRefresh) {
- that.pullUpEl.parentNode.removeChild(that.pullUpEl);
- }
- // Remove the scrollbars
- that.hScrollbar = false;
- that.vScrollbar = false;
- that._scrollbar('h');
- that._scrollbar('v');
- // Free some mem
- that.scroller.style.webkitTransform = '';
- // Remove the event listeners
- that._unbind('webkitTransitionEnd');
- that._unbind(RESIZE_EV);
- that._unbind(START_EV);
- that._unbind(MOVE_EV);
- that._unbind(END_EV);
- that._unbind(CANCEL_EV);
- if (that.options.zoom) {
- that._unbind('gesturestart');
- that._unbind('gesturechange');
- that._unbind('gestureend');
- that._unbind('gesturecancel');
- }
- },
-
- refresh: function () {
- var that = this,
- pos = 0, page = 0,
- i, l, els,
- oldHeight, offsets,
- loading;
- if (that.pullDownToRefresh) {
- loading = that.pullDownEl.className.match('loading');
- if (loading && !that.contentReady) {
- oldHeight = that.scrollerH;
- that.contentReady = true;
- that.pullDownEl.className = 'iScrollPullDown';
- that.pullDownLabel.innerText = that.options.pullDownLabel[0];
- that.offsetBottom = that.pullDownEl.offsetHeight;
- that.scroller.style.marginTop = -that.offsetBottom + 'px';
- } else if (!loading) {
- that.offsetBottom = that.pullDownEl.offsetHeight;
- that.scroller.style.marginTop = -that.offsetBottom + 'px';
- }
- }
- if (that.pullUpToRefresh) {
- loading = that.pullUpEl.className.match('loading');
- if (loading && !that.contentReady) {
- oldHeight = that.scrollerH;
- that.contentReady = true;
- that.pullUpEl.className = 'iScrollPullUp';
- that.pullUpLabel.innerText = that.options.pullUpLabel[0];
- that.offsetTop = that.pullUpEl.offsetHeight;
- that.scroller.style.marginBottom = -that.offsetTop + 'px';
- } else if (!loading) {
- that.offsetTop = that.pullUpEl.offsetHeight;
- that.scroller.style.marginBottom = -that.offsetTop + 'px';
- }
- }
- that.wrapperW = that.wrapper.clientWidth;
- that.wrapperH = that.wrapper.clientHeight;
- that.scrollerW = m.round(that.scroller.offsetWidth * that.scale);
- that.scrollerH = m.round((that.scroller.offsetHeight - that.offsetBottom - that.offsetTop) * that.scale);
- that.maxScrollX = that.wrapperW - that.scrollerW;
- that.maxScrollY = that.wrapperH - that.scrollerH;
- that.dirX = 0;
- that.dirY = 0;
-
- that._transitionTime(0);
- that.hScroll = that.options.hScroll && that.maxScrollX < 0;
- that.vScroll = that.options.vScroll && (!that.options.bounceLock && !that.hScroll || that.scrollerH > that.wrapperH);
- that.hScrollbar = that.hScroll && that.options.hScrollbar;
- that.vScrollbar = that.vScroll && that.options.vScrollbar && that.scrollerH > that.wrapperH;
- // Prepare the scrollbars
- that._scrollbar('h');
- that._scrollbar('v');
- // Snap
- if (typeof that.options.snap == 'string') {
- that.pagesX = [];
- that.pagesY = [];
- els = that.scroller.querySelectorAll(that.options.snap);
- for (i=0, l=els.length; i<l; i++) {
- pos = that._offset(els[i]);
- that.pagesX[i] = pos.x < that.maxScrollX ? that.maxScrollX : pos.x * that.scale;
- that.pagesY[i] = pos.y < that.maxScrollY ? that.maxScrollY : pos.y * that.scale;
- }
- } else if (that.options.snap) {
- that.pagesX = [];
- while (pos >= that.maxScrollX) {
- that.pagesX[page] = pos;
- pos = pos - that.wrapperW;
- page++;
- }
- if (that.maxScrollX%that.wrapperW) that.pagesX[that.pagesX.length] = that.maxScrollX - that.pagesX[that.pagesX.length-1] + that.pagesX[that.pagesX.length-1];
- pos = 0;
- page = 0;
- that.pagesY = [];
- while (pos >= that.maxScrollY) {
- that.pagesY[page] = pos;
- pos = pos - that.wrapperH;
- page++;
- }
- if (that.maxScrollY%that.wrapperH) that.pagesY[that.pagesY.length] = that.maxScrollY - that.pagesY[that.pagesY.length-1] + that.pagesY[that.pagesY.length-1];
- }
-
- // Recalculate wrapper offsets
- if (that.options.zoom) {
- offsets = that._offset(that.wrapper, true);
- that.wrapperOffsetLeft = -offsets.x;
- that.wrapperOffsetTop = -offsets.y;
- }
- if (oldHeight && that.y == 0) {
- oldHeight = oldHeight - that.scrollerH + that.y;
- that.scrollTo(0, oldHeight, 0);
- }
-
- that._resetPos();
- },
- scrollTo: function (x, y, time, relative) {
- var that = this;
- if (relative) {
- x = that.x - x;
- y = that.y - y;
- }
- time = !time || (m.round(that.x) == m.round(x) && m.round(that.y) == m.round(y)) ? 0 : time;
- that.moved = true;
- if (!that.options.HWTransition) {
- that._timedScroll(x, y, time);
- return;
- }
- if (time) that._bind('webkitTransitionEnd');
- that._transitionTime(time);
- that._pos(x, y);
- if (!time) setTimeout(function () { that._transitionEnd(); }, 0);
- },
- scrollToElement: function (el, time) {
- var that = this, pos;
- el = el.nodeType ? el : that.scroller.querySelector(el);
- if (!el) return;
- pos = that._offset(el);
- pos.x = pos.x > 0 ? 0 : pos.x < that.maxScrollX ? that.maxScrollX : pos.x;
- pos.y = pos.y > 0 ? 0 : pos.y < that.maxScrollY ? that.maxScrollY : pos.y;
- time = time === undefined ? m.max(m.abs(pos.x)*2, m.abs(pos.y)*2) : time;
- that.scrollTo(pos.x, pos.y, time);
- },
- scrollToPage: function (pageX, pageY, time) {
- var that = this, x, y;
-
- if (that.options.snap) {
- pageX = pageX == 'next' ? that.currPageX+1 : pageX == 'prev' ? that.currPageX-1 : pageX;
- pageY = pageY == 'next' ? that.currPageY+1 : pageY == 'prev' ? that.currPageY-1 : pageY;
- pageX = pageX < 0 ? 0 : pageX > that.pagesX.length-1 ? that.pagesX.length-1 : pageX;
- pageY = pageY < 0 ? 0 : pageY > that.pagesY.length-1 ? that.pagesY.length-1 : pageY;
- that.currPageX = pageX;
- that.currPageY = pageY;
- x = that.pagesX[pageX];
- y = that.pagesY[pageY];
- } else {
- x = -that.wrapperW * pageX;
- y = -that.wrapperH * pageY;
- if (x < that.maxScrollX) x = that.maxScrollX;
- if (y < that.maxScrollY) y = that.maxScrollY;
- }
- that.scrollTo(x, y, time || 400);
- },
- zoom: function (x, y, scale) {
- var that = this,
- relScale = scale / that.scale;
- x = x - that.wrapperOffsetLeft - that.x;
- y = y - that.wrapperOffsetTop - that.y;
- that.x = x - x * relScale + that.x;
- that.y = y - y * relScale + that.y;
- that.scale = scale;
- if (that.options.onZoomStart) that.options.onZoomStart.call(that);
- that.refresh();
- that._bind('webkitTransitionEnd');
- that._transitionTime(200);
- setTimeout(function () {
- that.zoomed = true;
- that.scroller.style.webkitTransform = trnOpen + that.x + 'px,' + that.y + 'px' + trnClose + ' scale(' + scale + ')';
- }, 0);
- }
- };
- var has3d = 'WebKitCSSMatrix' in window && 'm11' in new WebKitCSSMatrix(),
- hasTouch = 'ontouchstart' in window,
- hasGesture = 'ongesturestart' in window,
- // hasHashChange = 'onhashchange' in window,
- // hasTransitionEnd = 'onwebkittransitionend' in window,
- hasCompositing = 'WebKitTransitionEvent' in window,
- isIDevice = (/iphone|ipad/gi).test(navigator.appVersion),
- isAndroid = (/android/gi).test(navigator.appVersion),
- RESIZE_EV = 'onorientationchange' in window ? 'orientationchange' : 'resize',
- START_EV = hasTouch ? 'touchstart' : 'mousedown',
- MOVE_EV = hasTouch ? 'touchmove' : 'mousemove',
- END_EV = hasTouch ? 'touchend' : 'mouseup',
- CANCEL_EV = hasTouch ? 'touchcancel' : 'mouseup',
- trnOpen = 'translate' + (has3d ? '3d(' : '('),
- trnClose = has3d ? ',0)' : ')',
- m = Math;
- if (typeof exports !== 'undefined') exports.iScroll = iScroll;
- else window.iScroll = iScroll;
- })();