1/*! 2 * iScroll v4.1.9 ~ Copyright (c) 2011 Matteo Spinelli, http://cubiq.org 3 * Released under MIT license, http://cubiq.org/license 4 */ 5(function(){ 6var m = Math, 7 mround = function (r) { return r >> 0; }, 8 vendor = (/webkit/i).test(navigator.appVersion) ? 'webkit' : 9 (/firefox/i).test(navigator.userAgent) ? 'Moz' : 10 'opera' in window ? 'O' : '', 11 12 // Browser capabilities 13 isAndroid = (/android/gi).test(navigator.appVersion), 14 isIDevice = (/iphone|ipad/gi).test(navigator.appVersion), 15 isPlaybook = (/playbook/gi).test(navigator.appVersion), 16 isTouchPad = (/hp-tablet/gi).test(navigator.appVersion), 17 18 has3d = 'WebKitCSSMatrix' in window && 'm11' in new WebKitCSSMatrix(), 19 hasTouch = 'ontouchstart' in window && !isTouchPad, 20 hasTransform = vendor + 'Transform' in document.documentElement.style, 21 hasTransitionEnd = isIDevice || isPlaybook, 22 23 nextFrame = (function() { 24 return window.requestAnimationFrame 25 || window.webkitRequestAnimationFrame 26 || window.mozRequestAnimationFrame 27 || window.oRequestAnimationFrame 28 || window.msRequestAnimationFrame 29 || function(callback) { return setTimeout(callback, 1); } 30 })(), 31 cancelFrame = (function () { 32 return window.cancelRequestAnimationFrame 33 || window.webkitCancelRequestAnimationFrame 34 || window.mozCancelRequestAnimationFrame 35 || window.oCancelRequestAnimationFrame 36 || window.msCancelRequestAnimationFrame 37 || clearTimeout 38 })(), 39 40 // Events 41 RESIZE_EV = 'onorientationchange' in window ? 'orientationchange' : 'resize', 42 START_EV = hasTouch ? 'touchstart' : 'mousedown', 43 MOVE_EV = hasTouch ? 'touchmove' : 'mousemove', 44 END_EV = hasTouch ? 'touchend' : 'mouseup', 45 CANCEL_EV = hasTouch ? 'touchcancel' : 'mouseup', 46 WHEEL_EV = vendor == 'Moz' ? 'DOMMouseScroll' : 'mousewheel', 47 48 // Helpers 49 trnOpen = 'translate' + (has3d ? '3d(' : '('), 50 trnClose = has3d ? ',0)' : ')', 51 52 // Constructor 53 iScroll = function (el, options) { 54 var that = this, 55 doc = document, 56 i; 57 58 that.wrapper = typeof el == 'object' ? el : doc.getElementById(el); 59 that.wrapper.style.overflow = 'hidden'; 60 that.scroller = that.wrapper.children[0]; 61 62 // Default options 63 that.options = { 64 hScroll: true, 65 vScroll: true, 66 x: 0, 67 y: 0, 68 bounce: true, 69 bounceLock: false, 70 momentum: true, 71 lockDirection: true, 72 useTransform: true, 73 useTransition: false, 74 topOffset: 0, 75 checkDOMChanges: false, // Experimental 76 77 // Scrollbar 78 hScrollbar: true, 79 vScrollbar: true, 80 fixedScrollbar: isAndroid, 81 hideScrollbar: isIDevice, 82 fadeScrollbar: isIDevice && has3d, 83 scrollbarClass: '', 84 85 // Zoom 86 zoom: false, 87 zoomMin: 1, 88 zoomMax: 4, 89 doubleTapZoom: 2, 90 wheelAction: 'scroll', 91 92 // Snap 93 snap: false, 94 snapThreshold: 1, 95 96 // Events 97 onRefresh: null, 98 onBeforeScrollStart: function (e) { e.preventDefault(); }, 99 onScrollStart: null, 100 onBeforeScrollMove: null, 101 onScrollMove: null, 102 onBeforeScrollEnd: null, 103 onScrollEnd: null, 104 onTouchEnd: null, 105 onDestroy: null, 106 onZoomStart: null, 107 onZoom: null, 108 onZoomEnd: null 109 }; 110 // Helpers FIX ANDROID BUG! 111 // translate3d and scale doesn't work together! 112 // Ignoring 3d ONLY WHEN YOU SET that.zoom 113 if ( that.zoom && isAndroid ){ 114 trnOpen = 'translate('; 115 trnClose = ')'; 116 } 117 // User defined options 118 for (i in options) that.options[i] = options[i]; 119 120 // Set starting position 121 that.x = that.options.x; 122 that.y = that.options.y;
123 124 // Normalize options 125 that.options.useTransform = hasTransform ? that.options.useTransform : false; 126 that.options.hScrollbar = that.options.hScroll && that.options.hScrollbar; 127 that.options.vScrollbar = that.options.vScroll && that.options.vScrollbar; 128 that.options.zoom = that.options.useTransform && that.options.zoom; 129 that.options.useTransition = hasTransitionEnd && that.options.useTransition; 130 131 // Set some default styles 132 that.scroller.style[vendor + 'TransitionProperty'] = that.options.useTransform ? '-' + vendor.toLowerCase() + '-transform' : 'top left'; 133 that.scroller.style[vendor + 'TransitionDuration'] = '0'; 134 that.scroller.style[vendor + 'TransformOrigin'] = '0 0'; 135 if (that.options.useTransition) that.scroller.style[vendor + 'TransitionTimingFunction'] = 'cubic-bezier(0.33,0.66,0.66,1)'; 136 137 if (that.options.useTransform) that.scroller.style[vendor + 'Transform'] = trnOpen + that.x + 'px,' + that.y + 'px' + trnClose; 138 else that.scroller.style.cssText += ';position:absolute;top:' + that.y + 'px;left:' + that.x + 'px'; 139 140 if (that.options.useTransition) that.options.fixedScrollbar = true; 141 142 that.refresh(); 143 144 that._bind(RESIZE_EV, window); 145 that._bind(START_EV); 146 if (!hasTouch) { 147 that._bind('mouseout', that.wrapper); 148 that._bind(WHEEL_EV); 149 } 150 151 if (that.options.checkDOMChanges) that.checkDOMTime = setInterval(function () { 152 that._checkDOMChanges(); 153 }, 500); 154 }; 155 156// Prototype 157iScroll.prototype = { 158 enabled: true, 159 x: 0, 160 y: 0, 161 steps: [], 162 scale: 1, 163 currPageX: 0, currPageY: 0, 164 pagesX: [], pagesY: [], 165 aniTime: null, 166 wheelZoomCount: 0, 167 168 handleEvent: function (e) { 169 var that = this; 170 switch(e.type) { 171 case START_EV: 172 if (!hasTouch && e.button !== 0) return; 173 that._start(e); 174 break; 175 case MOVE_EV: that._move(e); break; 176 case END_EV: 177 case CANCEL_EV: that._end(e); break; 178 case RESIZE_EV: that._resize(); break; 179 case WHEEL_EV: that._wheel(e); break; 180 case 'mouseout': that._mouseout(e); break; 181 case 'webkitTransitionEnd': that._transitionEnd(e); break; 182 } 183 }, 184 185 _checkDOMChanges: function () { 186 if (this.moved || this.zoomed || this.animating || 187 (this.scrollerW == this.scroller.offsetWidth * this.scale && this.scrollerH == this.scroller.offsetHeight * this.scale)) return; 188 189 this.refresh(); 190 }, 191 192 _scrollbar: function (dir) { 193 var that = this, 194 doc = document, 195 bar; 196 197 if (!that[dir + 'Scrollbar']) { 198 if (that[dir + 'ScrollbarWrapper']) { 199 if (hasTransform) that[dir + 'ScrollbarIndicator'].style[vendor + 'Transform'] = ''; 200 that[dir + 'ScrollbarWrapper'].parentNode.removeChild(that[dir + 'ScrollbarWrapper']); 201 that[dir + 'ScrollbarWrapper'] = null; 202 that[dir + 'ScrollbarIndicator'] = null; 203 } 204 205 return; 206 } 207 208 if (!that[dir + 'ScrollbarWrapper']) { 209 // Create the scrollbar wrapper 210 bar = doc.createElement('div'); 211 212 if (that.options.scrollbarClass) bar.className = that.options.scrollbarClass + dir.toUpperCase(); 213 else bar.style.cssText = 'position:absolute;z-index:100;' + (dir == 'h' ? 'height:7px;bottom:1px;left:2px;right:' + (that.vScrollbar ? '7' : '2') + 'px' : 'width:7px;bottom:' + (that.hScrollbar ? '7' : '2') + 'px;top:2px;right:1px'); 214 215 bar.style.cssText += ';pointer-events:none;-' + vendor + '-transition-property:opacity;-' + vendor + '-transition-duration:' + (that.options.fadeScrollbar ? '350ms' : '0') + ';overflow:hidden;opacity:' + (that.options.hideScrollbar ? '0' : '1'); 216 217 that.wrapper.appendChild(bar); 218 that[dir + 'ScrollbarWrapper'] = bar; 219 220 // Create the scrollbar indicator 221 bar = doc.createElement('div'); 222 if (!that.options.scrollbarClass) { 223 bar.style.cssText = 'position:absolute;z-index:100;background:rgba(0,0,0,0.5);border:1px solid rgba(255,255,255,0.9);-' + vendor + '-background-clip:padding-box;-' + vendor + '-box-sizing:border-box;' + (dir == 'h' ? 'height:100%' : 'width:100%') + ';-' + vendor + '-border-radius:3px;border-radius:3px'; 224 } 225 bar.style.cssText += ';pointer-events:none;-' + vendor + '-transition-property:-' + vendor + '-transform;-' + vendor + '-transition-timing-function:cubic-bezier(0.33,0.66,0.66,1);-' + vendor + '-transition-duration:0;-' + vendor + '-transform:' + trnOpen + '0,0' + trnClose; 226 if (that.options.useTransition) bar.style.cssText += ';-' + vendor + '-transition-timing-function:cubic-bezier(0.33,0.66,0.66,1)'; 227 228 that[dir + 'ScrollbarWrapper'].appendChild(bar); 229 that[dir + 'ScrollbarIndicator'] = bar; 230 } 231 232 if (dir == 'h') { 233 that.hScrollbarSize = that.hScrollbarWrapper.clientWidth; 234 that.hScrollbarIndicatorSize = m.max(mround(that.hScrollbarSize * that.hScrollbarSize / that.scrollerW), 8); 235 that.hScrollbarIndicator.style.width = that.hScrollbarIndicatorSize + 'px'; 236 that.hScrollbarMaxScroll = that.hScrollbarSize - that.hScrollbarIndicatorSize; 237 that.hScrollbarProp = that.hScrollbarMaxScroll / that.maxScrollX; 238 } else { 239 that.vScrollbarSize = that.vScrollbarWrapper.clientHeight; 240 that.vScrollbarIndicatorSize = m.max(mround(that.vScrollbarSize * that.vScrollbarSize / that.scrollerH), 8); 241 that.vScrollbarIndicator.style.height = that.vScrollbarIndicatorSize + 'px'; 242 that.vScrollbarMaxScroll = that.vScrollbarSize - that.vScrollbarIndicatorSize; 243 that.vScrollbarProp = that.vScrollbarMaxScroll / that.maxScrollY; 244 } 245 246 // Reset position 247 that._scrollbarPos(dir, true); 248 }, 249 250 _resize: function () { 251 var that = this; 252 setTimeout(function () { that.refresh(); }, isAndroid ? 200 : 0); 253 }, 254 255 _pos: function (x, y) { 256 x = this.hScroll ? x : 0; 257 y = this.vScroll ? y : 0; 258 259 if (this.options.useTransform) { 260 this.scroller.style[vendor + 'Transform'] = trnOpen + x + 'px,' + y + 'px' + trnClose + ' scale(' + this.scale + ')'; 261 } else { 262 x = mround(x); 263 y = mround(y); 264 this.scroller.style.left = x + 'px'; 265 this.scroller.style.top = y + 'px'; 266 } 267 268 this.x = x; 269 this.y = y; 270 271 this._scrollbarPos('h'); 272 this._scrollbarPos('v'); 273 }, 274 275 _scrollbarPos: function (dir, hidden) { 276 var that = this, 277 pos = dir == 'h' ? that.x : that.y, 278 size; 279 280 if (!that[dir + 'Scrollbar']) return; 281 282 pos = that[dir + 'ScrollbarProp'] * pos; 283 284 if (pos < 0) { 285 if (!that.options.fixedScrollbar) { 286 size = that[dir + 'ScrollbarIndicatorSize'] + mround(pos * 3); 287 if (size < 8) size = 8; 288 that[dir + 'ScrollbarIndicator'].style[dir == 'h' ? 'width' : 'height'] = size + 'px'; 289 } 290 pos = 0; 291 } else if (pos > that[dir + 'ScrollbarMaxScroll']) { 292 if (!that.options.fixedScrollbar) { 293 size = that[dir + 'ScrollbarIndicatorSize'] - mround((pos - that[dir + 'ScrollbarMaxScroll']) * 3); 294 if (size < 8) size = 8; 295 that[dir + 'ScrollbarIndicator'].style[dir == 'h' ? 'width' : 'height'] = size + 'px'; 296 pos = that[dir + 'ScrollbarMaxScroll'] + (that[dir + 'ScrollbarIndicatorSize'] - size); 297 } else { 298 pos = that[dir + 'ScrollbarMaxScroll']; 299 } 300 } 301 302 that[dir + 'ScrollbarWrapper'].style[vendor + 'TransitionDelay'] = '0'; 303 that[dir + 'ScrollbarWrapper'].style.opacity = hidden && that.options.hideScrollbar ? '0' : '1'; 304 that[dir + 'ScrollbarIndicator'].style[vendor + 'Transform'] = trnOpen + (dir == 'h' ? pos + 'px,0' : '0,' + pos + 'px') + trnClose; 305 }, 306 307 _start: function (e) { 308 var that = this, 309 point = hasTouch ? e.touches[0] : e, 310 matrix, x, y, 311 c1, c2; 312 313 if (!that.enabled) return; 314 315 if (that.options.onBeforeScrollStart) that.options.onBeforeScrollStart.call(that, e); 316 317 if (that.options.useTransition || that.options.zoom) that._transitionTime(0); 318 319 that.active = true; 320 that.moved = false; 321 that.animating = false; 322 that.zoomed = false; 323 that.distX = 0; 324 that.distY = 0; 325 that.absDistX = 0; 326 that.absDistY = 0; 327 that.dirX = 0; 328 that.dirY = 0; 329 330 // Gesture start 331 if (that.options.zoom && hasTouch && e.touches.length > 1) { 332 c1 = m.abs(e.touches[0].pageX-e.touches[1].pageX); 333 c2 = m.abs(e.touches[0].pageY-e.touches[1].pageY);
334 that.touchesDistStart = m.sqrt(c1 * c1 + c2 * c2); 335 336 that.originX = m.abs(e.touches[0].pageX + e.touches[1].pageX - that.wrapperOffsetLeft * 2) / 2 - that.x; 337 that.originY = m.abs(e.touches[0].pageY + e.touches[1].pageY - that.wrapperOffsetTop * 2) / 2 - that.y; 338 339 if (that.options.onZoomStart) that.options.onZoomStart.call(that, e); 340 } 341 342 if (that.options.momentum) { 343 if (that.options.useTransform) { 344 // Very lame general purpose alternative to CSSMatrix 345 matrix = getComputedStyle(that.scroller, null)[vendor + 'Transform'].replace(/[^0-9-.,]/g, '').split(','); 346 x = matrix[4] * 1; 347 y = matrix[5] * 1; 348 } else { 349 x = getComputedStyle(that.scroller, null).left.replace(/[^0-9-]/g, '') * 1; 350 y = getComputedStyle(that.scroller, null).top.replace(/[^0-9-]/g, '') * 1; 351 } 352 353 if (x != that.x || y != that.y) { 354 if (that.options.useTransition) that._unbind('webkitTransitionEnd'); 355 else cancelFrame(that.aniTime); 356 that.steps = []; 357 that._pos(x, y); 358 } 359 } 360 361 that.absStartX = that.x; // Needed by snap threshold 362 that.absStartY = that.y; 363 364 that.startX = that.x; 365 that.startY = that.y; 366 that.pointX = point.pageX; 367 that.pointY = point.pageY; 368 369 that.startTime = e.timeStamp || Date.now(); 370 371 if (that.options.onScrollStart) that.options.onScrollStart.call(that, e); 372 373 that._bind(MOVE_EV); 374 that._bind(END_EV); 375 that._bind(CANCEL_EV); 376 }, 377 378 _move: function (e) { 379 var that = this, 380 point = hasTouch ? e.touches[0] : e, 381 deltaX = point.pageX - that.pointX, 382 deltaY = point.pageY - that.pointY, 383 newX = that.x + deltaX, 384 newY = that.y + deltaY, 385 c1, c2, scale, 386 timestamp = e.timeStamp || Date.now(); 387 388 if (that.options.onBeforeScrollMove) that.options.onBeforeScrollMove.call(that, e); 389 390 // Zoom 391 if (that.options.zoom && hasTouch && e.touches.length > 1) { 392 c1 = m.abs(e.touches[0].pageX - e.touches[1].pageX); 393 c2 = m.abs(e.touches[0].pageY - e.touches[1].pageY); 394 that.touchesDist = m.sqrt(c1*c1+c2*c2); 395 396 that.zoomed = true; 397 398 scale = 1 / that.touchesDistStart * that.touchesDist * this.scale; 399 400 if (scale < that.options.zoomMin) scale = 0.5 * that.options.zoomMin * Math.pow(2.0, scale / that.options.zoomMin); 401 else if (scale > that.options.zoomMax) scale = 2.0 * that.options.zoomMax * Math.pow(0.5, that.options.zoomMax / scale); 402 403 that.lastScale = scale / this.scale; 404 405 newX = this.originX - this.originX * that.lastScale + this.x, 406 newY = this.originY - this.originY * that.lastScale + this.y; 407 408 this.scroller.style[vendor + 'Transform'] = trnOpen + newX + 'px,' + newY + 'px' + trnClose + ' scale(' + scale + ')'; 409 410 if (that.options.onZoom) that.options.onZoom.call(that, e); 411 return; 412 } 413 414 that.pointX = point.pageX; 415 that.pointY = point.pageY; 416 417 // Slow down if outside of the boundaries 418 if (newX > 0 || newX < that.maxScrollX) { 419 newX = that.options.bounce ? that.x + (deltaX / 2) : newX >= 0 || that.maxScrollX >= 0 ? 0 : that.maxScrollX; 420 } 421 if (newY > that.minScrollY || newY < that.maxScrollY) { 422 newY = that.options.bounce ? that.y + (deltaY / 2) : newY >= that.minScrollY || that.maxScrollY >= 0 ? that.minScrollY : that.maxScrollY; 423 } 424 425 if (that.absDistX < 6 && that.absDistY < 6) { 426 that.distX += deltaX; 427 that.distY += deltaY; 428 that.absDistX = m.abs(that.distX); 429 that.absDistY = m.abs(that.distY); 430 431 return; 432 } 433 434 // Lock direction 435 if (that.options.lockDirection) { 436 if (that.absDistX > that.absDistY + 5) { 437 newY = that.y; 438 deltaY = 0; 439 } else if (that.absDistY > that.absDistX + 5) { 440 newX = that.x; 441 deltaX = 0; 442 } 443 } 444 445 that.moved = true; 446 that._pos(newX, newY); 447 that.dirX = deltaX > 0 ? -1 : deltaX < 0 ? 1 : 0; 448 that.dirY = deltaY > 0 ? -1 : deltaY < 0 ? 1 : 0; 449 450 if (timestamp - that.startTime > 300) { 451 that.startTime = timestamp; 452 that.startX = that.x; 453 that.startY = that.y; 454 } 455 456 if (that.options.onScrollMove) that.options.onScrollMove.call(that, e); 457 }, 458 459 _end: function (e) { 460 if (hasTouch && e.touches.length != 0) return; 461 462 var that = this, 463 point = hasTouch ? e.changedTouches[0] : e, 464 target, ev, 465 momentumX = { dist:0, time:0 }, 466 momentumY = { dist:0, time:0 }, 467 duration = (e.timeStamp || Date.now()) - that.startTime, 468 newPosX = that.x, 469 newPosY = that.y, 470 distX, distY, 471 newDuration, 472 snap, 473 scale; 474 475 that._unbind(MOVE_EV); 476 that._unbind(END_EV); 477 that._unbind(CANCEL_EV); 478 479 if (!that.active) return; 480 that.active = false; 481 482 if (that.options.onBeforeScrollEnd) that.options.onBeforeScrollEnd.call(that, e); 483 484 if (that.zoomed) { 485 scale = that.scale * that.lastScale; 486 scale = Math.max(that.options.zoomMin, scale); 487 scale = Math.min(that.options.zoomMax, scale); 488 that.lastScale = scale / that.scale; 489 that.scale = scale; 490 491 that.x = that.originX - that.originX * that.lastScale + that.x; 492 that.y = that.originY - that.originY * that.lastScale + that.y; 493 494 that.scroller.style[vendor + 'TransitionDuration'] = '200ms'; 495 that.scroller.style[vendor + 'Transform'] = trnOpen + that.x + 'px,' + that.y + 'px' + trnClose + ' scale(' + that.scale + ')'; 496 497 that.zoomed = false; 498 that.refresh();
499 500 if (that.options.onZoomEnd) that.options.onZoomEnd.call(that, e); 501 return; 502 } 503 504 if (!that.moved) { 505 if (hasTouch) { 506 if (that.doubleTapTimer && that.options.zoom) { 507 // Double tapped 508 clearTimeout(that.doubleTapTimer); 509 that.doubleTapTimer = null; 510 if (that.options.onZoomStart) that.options.onZoomStart.call(that, e); 511 that.zoom(that.pointX, that.pointY, that.scale == 1 ? that.options.doubleTapZoom : 1); 512 if (that.options.onZoomEnd) { 513 setTimeout(function() { 514 that.options.onZoomEnd.call(that, e); 515 }, 200); // 200 is default zoom duration 516 } 517 } else { 518 that.doubleTapTimer = setTimeout(function () { 519 that.doubleTapTimer = null; 520 521 // Find the last touched element 522 target = point.target; 523 while (target.nodeType != 1) target = target.parentNode; 524 525 if (target.tagName != 'SELECT' && target.tagName != 'INPUT' && target.tagName != 'TEXTAREA') { 526 ev = document.createEvent('MouseEvents'); 527 ev.initMouseEvent('click', true, true, e.view, 1, 528 point.screenX, point.screenY, point.clientX, point.clientY, 529 e.ctrlKey, e.altKey, e.shiftKey, e.metaKey, 530 0, null); 531 ev._fake = true; 532 target.dispatchEvent(ev); 533 } 534 }, that.options.zoom ? 250 : 0); 535 } 536 } 537 538 that._resetPos(200); 539 540 if (that.options.onTouchEnd) that.options.onTouchEnd.call(that, e); 541 return; 542 } 543 544 if (duration < 300 && that.options.momentum) { 545 momentumX = newPosX ? that._momentum(newPosX - that.startX, duration, -that.x, that.scrollerW - that.wrapperW + that.x, that.options.bounce ? that.wrapperW : 0) : momentumX; 546 momentumY = newPosY ? that._momentum(newPosY - that.startY, duration, -that.y, (that.maxScrollY < 0 ? that.scrollerH - that.wrapperH + that.y - that.minScrollY : 0), that.options.bounce ? that.wrapperH : 0) : momentumY; 547 548 newPosX = that.x + momentumX.dist; 549 newPosY = that.y + momentumY.dist; 550 551 if ((that.x > 0 && newPosX > 0) || (that.x < that.maxScrollX && newPosX < that.maxScrollX)) momentumX = { dist:0, time:0 }; 552 if ((that.y > that.minScrollY && newPosY > that.minScrollY) || (that.y < that.maxScrollY && newPosY < that.maxScrollY)) momentumY = { dist:0, time:0 }; 553 } 554 555 if (momentumX.dist || momentumY.dist) { 556 newDuration = m.max(m.max(momentumX.time, momentumY.time), 10); 557 558 // Do we need to snap? 559 if (that.options.snap) { 560 distX = newPosX - that.absStartX; 561 distY = newPosY - that.absStartY; 562 if (m.abs(distX) < that.options.snapThreshold && m.abs(distY) < that.options.snapThreshold) { that.scrollTo(that.absStartX, that.absStartY, 200); } 563 else { 564 snap = that._snap(newPosX, newPosY); 565 newPosX = snap.x; 566 newPosY = snap.y; 567 newDuration = m.max(snap.time, newDuration); 568 } 569 } 570 571 that.scrollTo(mround(newPosX), mround(newPosY), newDuration); 572 573 if (that.options.onTouchEnd) that.options.onTouchEnd.call(that, e); 574 return; 575 } 576 577 // Do we need to snap? 578 if (that.options.snap) { 579 distX = newPosX - that.absStartX; 580 distY = newPosY - that.absStartY; 581 if (m.abs(distX) < that.options.snapThreshold && m.abs(distY) < that.options.snapThreshold) that.scrollTo(that.absStartX, that.absStartY, 200); 582 else { 583 snap = that._snap(that.x, that.y); 584 if (snap.x != that.x || snap.y != that.y) that.scrollTo(snap.x, snap.y, snap.time); 585 } 586 587 if (that.options.onTouchEnd) that.options.onTouchEnd.call(that, e); 588 return; 589 } 590 591 that._resetPos(200); 592 if (that.options.onTouchEnd) that.options.onTouchEnd.call(that, e); 593 }, 594 595 _resetPos: function (time) { 596 var that = this, 597 resetX = that.x >= 0 ? 0 : that.x < that.maxScrollX ? that.maxScrollX : that.x, 598 resetY = that.y >= that.minScrollY || that.maxScrollY > 0 ? that.minScrollY : that.y < that.maxScrollY ? that.maxScrollY : that.y; 599 600 if (resetX == that.x && resetY == that.y) { 601 if (that.moved) { 602 that.moved = false; 603 if (that.options.onScrollEnd) that.options.onScrollEnd.call(that); // Execute custom code on scroll end 604 } 605 606 if (that.hScrollbar && that.options.hideScrollbar) { 607 if (vendor == 'webkit') that.hScrollbarWrapper.style[vendor + 'TransitionDelay'] = '300ms'; 608 that.hScrollbarWrapper.style.opacity = '0'; 609 } 610 if (that.vScrollbar && that.options.hideScrollbar) { 611 if (vendor == 'webkit') that.vScrollbarWrapper.style[vendor + 'TransitionDelay'] = '300ms'; 612 that.vScrollbarWrapper.style.opacity = '0'; 613 } 614 615 return; 616 } 617 618 that.scrollTo(resetX, resetY, time || 0); 619 }, 620 621 _wheel: function (e) { 622 var that = this, 623 wheelDeltaX, wheelDeltaY, 624 deltaX, deltaY, 625 deltaScale; 626 627 if ('wheelDeltaX' in e) { 628 wheelDeltaX = e.wheelDeltaX / 12; 629 wheelDeltaY = e.wheelDeltaY / 12; 630 } else if ('detail' in e) { 631 wheelDeltaX = wheelDeltaY = -e.detail * 3; 632 } else { 633 wheelDeltaX = wheelDeltaY = -e.wheelDelta; 634 } 635 636 if (that.options.wheelAction == 'zoom') { 637 deltaScale = that.scale * Math.pow(2, 1/3 * (wheelDeltaY ? wheelDeltaY / Math.abs(wheelDeltaY) : 0)); 638 if (deltaScale < that.options.zoomMin) deltaScale = that.options.zoomMin; 639 if (deltaScale > that.options.zoomMax) deltaScale = that.options.zoomMax; 640 641 if (deltaScale != that.scale) { 642 if (!that.wheelZoomCount && that.options.onZoomStart) that.options.onZoomStart.call(that, e); 643 that.wheelZoomCount++; 644 645 that.zoom(e.pageX, e.pageY, deltaScale, 400); 646 647 setTimeout(function() { 648 that.wheelZoomCount--; 649 if (!that.wheelZoomCount && that.options.onZoomEnd) that.options.onZoomEnd.call(that, e); 650 }, 400); 651 } 652 653 return; 654 } 655 656 deltaX = that.x + wheelDeltaX; 657 deltaY = that.y + wheelDeltaY; 658 659 if (deltaX > 0) deltaX = 0; 660 else if (deltaX < that.maxScrollX) deltaX = that.maxScrollX; 661 662 if (deltaY > that.minScrollY) deltaY = that.minScrollY; 663 else if (deltaY < that.maxScrollY) deltaY = that.maxScrollY; 664 665 that.scrollTo(deltaX, deltaY, 0); 666 }, 667 668 _mouseout: function (e) { 669 var t = e.relatedTarget; 670 671 if (!t) { 672 this._end(e); 673 return; 674 } 675 676 while (t = t.parentNode) if (t == this.wrapper) return; 677 678 this._end(e); 679 }, 680 681 _transitionEnd: function (e) { 682 var that = this; 683 684 if (e.target != that.scroller) return; 685 686 that._unbind('webkitTransitionEnd'); 687 688 that._startAni(); 689 }, 690 691 692 /** 693 * 694 * Utilities 695 * 696 */ 697 _startAni: function () { 698 var that = this, 699 startX = that.x, startY = that.y, 700 startTime = Date.now(), 701 step, easeOut, 702 animate; 703 704 if (that.animating) return; 705 706 if (!that.steps.length) { 707 that._resetPos(400); 708 return; 709 } 710 711 step = that.steps.shift(); 712 713 if (step.x == startX && step.y == startY) step.time = 0; 714 715 that.animating = true; 716 that.moved = true; 717 718 if (that.options.useTransition) { 719 that._transitionTime(step.time); 720 that._pos(step.x, step.y); 721 that.animating = false; 722 if (step.time) that._bind('webkitTransitionEnd'); 723 else that._resetPos(0); 724 return; 725 } 726 727 animate = function () { 728 var now = Date.now(), 729 newX, newY; 730 731 if (now >= startTime + step.time) { 732 that._pos(step.x, step.y); 733 that.animating = false; 734 if (that.options.onAnimationEnd) that.options.onAnimationEnd.call(that); // Execute custom code on animation end 735 that._startAni(); 736 return; 737 } 738 739 now = (now - startTime) / step.time - 1;
740 easeOut = m.sqrt(1 - now * now); 741 newX = (step.x - startX) * easeOut + startX; 742 newY = (step.y - startY) * easeOut + startY; 743 that._pos(newX, newY); 744 if (that.animating) that.aniTime = nextFrame(animate); 745 }; 746 747 animate(); 748 }, 749 750 _transitionTime: function (time) { 751 time += 'ms'; 752 this.scroller.style[vendor + 'TransitionDuration'] = time; 753 if (this.hScrollbar) this.hScrollbarIndicator.style[vendor + 'TransitionDuration'] = time; 754 if (this.vScrollbar) this.vScrollbarIndicator.style[vendor + 'TransitionDuration'] = time; 755 }, 756 757 _momentum: function (dist, time, maxDistUpper, maxDistLower, size) { 758 var deceleration = 0.0006, 759 speed = m.abs(dist) / time, 760 newDist = (speed * speed) / (2 * deceleration), 761 newTime = 0, outsideDist = 0; 762 763 // Proportinally reduce speed if we are outside of the boundaries 764 if (dist > 0 && newDist > maxDistUpper) { 765 outsideDist = size / (6 / (newDist / speed * deceleration)); 766 maxDistUpper = maxDistUpper + outsideDist; 767 speed = speed * maxDistUpper / newDist; 768 newDist = maxDistUpper; 769 } else if (dist < 0 && newDist > maxDistLower) { 770 outsideDist = size / (6 / (newDist / speed * deceleration)); 771 maxDistLower = maxDistLower + outsideDist; 772 speed = speed * maxDistLower / newDist; 773 newDist = maxDistLower; 774 } 775 776 newDist = newDist * (dist < 0 ? -1 : 1); 777 newTime = speed / deceleration; 778 779 return { dist: newDist, time: mround(newTime) }; 780 }, 781 782 _offset: function (el) { 783 var left = -el.offsetLeft, 784 top = -el.offsetTop; 785 786 while (el = el.offsetParent) { 787 left -= el.offsetLeft; 788 top -= el.offsetTop; 789 } 790 791 if (el != this.wrapper) { 792 left *= this.scale; 793 top *= this.scale; 794 } 795 796 return { left: left, top: top }; 797 }, 798 799 _snap: function (x, y) { 800 var that = this, 801 i, l, 802 page, time, 803 sizeX, sizeY; 804 805 // Check page X 806 page = that.pagesX.length - 1; 807 for (i=0, l=that.pagesX.length; i<l; i++) { 808 if (x >= that.pagesX[i]) { 809 page = i; 810 break; 811 } 812 } 813 if (page == that.currPageX && page > 0 && that.dirX < 0) page--; 814 x = that.pagesX[page]; 815 sizeX = m.abs(x - that.pagesX[that.currPageX]); 816 sizeX = sizeX ? m.abs(that.x - x) / sizeX * 500 : 0; 817 that.currPageX = page; 818 819 // Check page Y 820 page = that.pagesY.length-1; 821 for (i=0; i<page; i++) { 822 if (y >= that.pagesY[i]) { 823 page = i; 824 break; 825 } 826 } 827 if (page == that.currPageY && page > 0 && that.dirY < 0) page--; 828 y = that.pagesY[page]; 829 sizeY = m.abs(y - that.pagesY[that.currPageY]); 830 sizeY = sizeY ? m.abs(that.y - y) / sizeY * 500 : 0; 831 that.currPageY = page; 832 833 // Snap with constant speed (proportional duration) 834 time = mround(m.max(sizeX, sizeY)) || 200; 835 836 return { x: x, y: y, time: time }; 837 }, 838 839 _bind: function (type, el, bubble) { 840 (el || this.scroller).addEventListener(type, this, !!bubble); 841 }, 842 843 _unbind: function (type, el, bubble) { 844 (el || this.scroller).removeEventListener(type, this, !!bubble); 845 }, 846 847 848 /** 849 * 850 * Public methods 851 * 852 */ 853 destroy: function () { 854 var that = this; 855 856 that.scroller.style[vendor + 'Transform'] = ''; 857 858 // Remove the scrollbars 859 that.hScrollbar = false; 860 that.vScrollbar = false; 861 that._scrollbar('h'); 862 that._scrollbar('v'); 863 864 // Remove the event listeners 865 that._unbind(RESIZE_EV, window); 866 that._unbind(START_EV); 867 that._unbind(MOVE_EV); 868 that._unbind(END_EV); 869 that._unbind(CANCEL_EV); 870 871 if (that.options.hasTouch) { 872 that._unbind('mouseout', that.wrapper); 873 that._unbind(WHEEL_EV); 874 } 875 876 if (that.options.useTransition) that._unbind('webkitTransitionEnd'); 877 878 if (that.options.checkDOMChanges) clearInterval(that.checkDOMTime); 879 880 if (that.options.onDestroy) that.options.onDestroy.call(that); 881 }, 882 883 refresh: function () { 884 var that = this, 885 offset, 886 i, l, 887 els, 888 pos = 0, 889 page = 0; 890 891 if (that.scale < that.options.zoomMin) that.scale = that.options.zoomMin; 892 that.wrapperW = that.wrapper.clientWidth || 1; 893 that.wrapperH = that.wrapper.clientHeight || 1; 894 895 that.minScrollY = -that.options.topOffset || 0;
896 that.scrollerW = mround(that.scroller.offsetWidth * that.scale); 897 that.scrollerH = mround((that.scroller.offsetHeight + that.minScrollY) * that.scale); 898 that.maxScrollX = that.wrapperW - that.scrollerW; 899 that.maxScrollY = that.wrapperH - that.scrollerH + that.minScrollY; 900 that.dirX = 0; 901 that.dirY = 0; 902 903 if (that.options.onRefresh) that.options.onRefresh.call(that); 904 905 that.hScroll = that.options.hScroll && that.maxScrollX < 0; 906 that.vScroll = that.options.vScroll && (!that.options.bounceLock && !that.hScroll || that.scrollerH > that.wrapperH); 907 908 that.hScrollbar = that.hScroll && that.options.hScrollbar; 909 that.vScrollbar = that.vScroll && that.options.vScrollbar && that.scrollerH > that.wrapperH; 910 911 offset = that._offset(that.wrapper); 912 that.wrapperOffsetLeft = -offset.left; 913 that.wrapperOffsetTop = -offset.top; 914 915 // Prepare snap 916 if (typeof that.options.snap == 'string') { 917 that.pagesX = []; 918 that.pagesY = []; 919 els = that.scroller.querySelectorAll(that.options.snap); 920 for (i=0, l=els.length; i<l; i++) { 921 pos = that._offset(els[i]); 922 pos.left += that.wrapperOffsetLeft; 923 pos.top += that.wrapperOffsetTop; 924 that.pagesX[i] = pos.left < that.maxScrollX ? that.maxScrollX : pos.left * that.scale; 925 that.pagesY[i] = pos.top < that.maxScrollY ? that.maxScrollY : pos.top * that.
925scale; 926 } 927 } else if (that.options.snap) { 928 that.pagesX = []; 929 while (pos >= that.maxScrollX) { 930 that.pagesX[page] = pos; 931 pos = pos - that.wrapperW; 932 page++; 933 } 934 if (that.maxScrollX%that.wrapperW) that.pagesX[that.pagesX.length] = that.maxScrollX - that.pagesX[that.pagesX.length-1] + that.pagesX[that.pagesX.length-1]; 935 936 pos = 0; 937 page = 0; 938 that.pagesY = []; 939 while (pos >= that.maxScrollY) { 940 that.pagesY[page] = pos; 941 pos = pos - that.wrapperH; 942 page++; 943 } 944 if (that.maxScrollY%that.wrapperH) that.pagesY[that.pagesY.length] = that.maxScrollY - that.pagesY[that.pagesY.length-1] + that.pagesY[that.pagesY.length-1]; 945 } 946 947 // Prepare the scrollbars 948 that._scrollbar('h'); 949 that._scrollbar('v'); 950 951 if (!that.zoomed) { 952 that.scroller.style[vendor + 'TransitionDuration'] = '0'; 953 that._resetPos(200); 954 } 955 }, 956 957 scrollTo: function (x, y, time, relative) { 958 var that = this, 959 step = x, 960 i, l; 961 962 that.stop(); 963 964 if (!step.length) step = [{ x: x, y: y, time: time, relative: relative }]; 965 966 for (i=0, l=step.length; i<l; i++) { 967 if (step[i].relative) { step[i].x = that.x - step[i].x; step[i].y = that.y - step[i].y; } 968 that.steps.push({ x: step[i].x, y: step[i].y, time: step[i].time || 0 }); 969 } 970 971 that._startAni(); 972 }, 973 974 scrollToElement: function (el, time) { 975 var that = this, pos; 976 el = el.nodeType ? el : that.scroller.querySelector(el); 977 if (!el) return; 978 979 pos = that._offset(el); 980 pos.left += that.wrapperOffsetLeft; 981 pos.top += that.wrapperOffsetTop; 982 983 pos.left = pos.left > 0 ? 0 : pos.left < that.maxScrollX ? that.maxScrollX : pos.left; 984 pos.top = pos.top > that.minScrollY ? that.minScrollY : pos.top < that.maxScrollY ? that.maxScrollY : pos.top; 985 time = time === undefined ? m.max(m.abs(pos.left)*2, m.abs(pos.top)*2) : time; 986 987 that.scrollTo(pos.left, pos.top, time); 988 }, 989 990 scrollToPage: function (pageX, pageY, time) { 991 var that = this, x, y; 992 993 if (that.options.onScrollStart) that.options.onScrollStart.call(that); 994 995 if (that.options.snap) { 996 pageX = pageX == 'next' ? that.currPageX+1 : pageX == 'prev' ? that.currPageX-1 : pageX; 997 pageY = pageY == 'next' ? that.currPageY+1 : pageY == 'prev' ? that.currPageY-1 : pageY; 998 999 pageX = pageX < 0 ? 0 : pageX > that.pagesX.length-1 ? that.pagesX.length-1 : pageX; 1000 pageY = pageY < 0 ? 0 : pageY > that.pagesY.length-1 ? that.pagesY.length-1 : pageY; 1001 1002 that.currPageX = pageX; 1003 that.currPageY = pageY; 1004 x = that.pagesX[pageX]; 1005 y = that.pagesY[pageY]; 1006 } else { 1007 x = -that.wrapperW * pageX; 1008 y = -that.wrapperH * pageY; 1009 if (x < that.maxScrollX) x = that.maxScrollX; 1010 if (y < that.maxScrollY) y = that.maxScrollY; 1011 } 1012 1013 that.scrollTo(x, y, time || 400); 1014 }, 1015 1016 disable: function () { 1017 this.stop(); 1018 this._resetPos(0); 1019 this.enabled = false; 1020 1021 // If disabled after touchstart we make sure that there are no left over events 1022 this._unbind(MOVE_EV); 1023 this._unbind(END_EV); 1024 this._unbind(CANCEL_EV); 1025 }, 1026 1027 enable: function () { 1028 this.enabled = true; 1029 }, 1030 1031 stop: function () { 1032 if (this.options.useTransition) this._unbind('webkitTransitionEnd'); 1033 else cancelFrame(this.aniTime); 1034 this.steps = []; 1035 this.moved = false; 1036 this.animating = false; 1037 }, 1038 1039 zoom: function (x, y, scale, time) { 1040 var that = this, 1041 relScale = scale / that.scale; 1042 1043 if (!that.options.useTransform) return; 1044 1045 that.zoomed = true; 1046 time = time === undefined ? 200 : time; 1047 x = x - that.wrapperOffsetLeft - that.x; 1048 y = y - that.wrapperOffsetTop - that.y; 1049 that.x = x - x * relScale + that.x; 1050 that.y = y - y * relScale + that.y; 1051 1052 that.scale = scale; 1053 that.refresh(); 1054 1055 that.x = that.x > 0 ? 0 : that.x < that.maxScrollX ? that.maxScrollX : that.x; 1056 that.y = that.y > that.minScrollY ? that.minScrollY : that.y < that.maxScrollY ? that.maxScrollY : that.y; 1057 1058 that.scroller.style[vendor + 'TransitionDuration'] = time + 'ms'; 1059 that.scroller.style[vendor + 'Transform'] = trnOpen + that.x + 'px,' + that.y + 'px' + trnClose + ' scale(' + scale + ')'; 1060 that.zoomed = false; 1061 }, 1062 1063 isReady: function () { 1064 return !this.moved && !this.zoomed && !this.animating; 1065 } 1066}; 1067 1068if (typeof exports !== 'undefined') exports.iScroll = iScroll; 1069else window.iScroll = iScroll; 1070 1071})();
Line numbers count LF bytes from the start of the resource, as the search results do. Vendor segments are library code the classifier recognised; they are stored but not indexed. Bytes are shown as Latin1 characters, one per byte.