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2
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1
| /*
* Scroller
* http://github.com/zynga/scroller
*
* Copyright 2011, Zynga Inc.
* Licensed under the MIT License.
* https://raw.github.com/zynga/scroller/master/MIT-LICENSE.txt
*
* Based on the work of: Unify Project (unify-project.org)
* http://unify-project.org
* Copyright 2011, Deutsche Telekom AG
* License: MIT + Apache (V2)
*/
/* jshint eqnull: true */
/**
* Generic animation class with support for dropped frames both optional easing and duration.
*
* Optional duration is useful when the lifetime is defined by another condition than time
* e.g. speed of an animating object, etc.
*
* Dropped frame logic allows to keep using the same updater logic independent from the actual
* rendering. This eases a lot of cases where it might be pretty complex to break down a state
* based on the pure time difference.
*/
var zyngaCore = { effect: {} };
(function(global) {
var time = Date.now || function() {
return +new Date();
};
var desiredFrames = 60;
var millisecondsPerSecond = 1000;
var running = {};
var counter = 1;
zyngaCore.effect.Animate = {
/**
* A requestAnimationFrame wrapper / polyfill.
*
* @param callback {Function} The callback to be invoked before the next repaint.
* @param root {HTMLElement} The root element for the repaint
*/
requestAnimationFrame: (function() {
// Check for request animation Frame support
var requestFrame = global.requestAnimationFrame || global.webkitRequestAnimationFrame || global.mozRequestAnimationFrame || global.oRequestAnimationFrame;
var isNative = !!requestFrame;
if (requestFrame && !/requestAnimationFrame\(\)\s*\{\s*\[native code\]\s*\}/i.test(requestFrame.toString())) {
isNative = false;
}
if (isNative) {
return function(callback, root) {
requestFrame(callback, root);
};
}
var TARGET_FPS = 60;
var requests = {};
var requestCount = 0;
var rafHandle = 1;
var intervalHandle = null;
var lastActive = +new Date();
return function(callback) {
var callbackHandle = rafHandle++;
// Store callback
requests[callbackHandle] = callback;
requestCount++;
// Create timeout at first request
if (intervalHandle === null) {
intervalHandle = setInterval(function() {
var time = +new Date();
var currentRequests = requests;
// Reset data structure before executing callbacks
requests = {};
requestCount = 0;
for(var key in currentRequests) {
if (currentRequests.hasOwnProperty(key)) {
currentRequests[key](time);
lastActive = time;
}
}
// Disable the timeout when nothing happens for a certain
// period of time
if (time - lastActive > 2500) {
clearInterval(intervalHandle);
intervalHandle = null;
}
}, 1000 / TARGET_FPS);
}
return callbackHandle;
};
})(),
/**
* Stops the given animation.
*
* @param id {Integer} Unique animation ID
* @return {Boolean} Whether the animation was stopped (aka, was running before)
*/
stop: function(id) {
var cleared = running[id] != null;
if (cleared) {
running[id] = null;
}
return cleared;
},
/**
* Whether the given animation is still running.
*
* @param id {Integer} Unique animation ID
* @return {Boolean} Whether the animation is still running
*/
isRunning: function(id) {
return running[id] != null;
},
/**
* Start the animation.
*
* @param stepCallback {Function} Pointer to function which is executed on every step.
* Signature of the method should be `function(percent, now, virtual) { return continueWithAnimation; }`
* @param verifyCallback {Function} Executed before every animation step.
* Signature of the method should be `function() { return continueWithAnimation; }`
* @param completedCallback {Function}
* Signature of the method should be `function(droppedFrames, finishedAnimation) {}`
* @param duration {Integer} Milliseconds to run the animation
* @param easingMethod {Function} Pointer to easing function
* Signature of the method should be `function(percent) { return modifiedValue; }`
* @param root {Element} Render root, when available. Used for internal
* usage of requestAnimationFrame.
* @return {Integer} Identifier of animation. Can be used to stop it any time.
*/
start: function(stepCallback, verifyCallback, completedCallback, duration, easingMethod, root) {
var start = time();
var lastFrame = start;
var percent = 0;
var dropCounter = 0;
var id = counter++;
if (!root) {
root = document.body;
}
// Compacting running db automatically every few new animations
if (id % 20 === 0) {
var newRunning = {};
for (var usedId in running) {
newRunning[usedId] = true;
}
running = newRunning;
}
// This is the internal step method which is called every few milliseconds
var step = function(virtual) {
// Normalize virtual value
var render = virtual !== true;
// Get current time
var now = time();
// Verification is executed before next animation step
if (!running[id] || (verifyCallback && !verifyCallback(id))) {
running[id] = null;
completedCallback && completedCallback(desiredFrames - (dropCounter / ((now - start) / millisecondsPerSecond)), id, false);
return;
}
// For the current rendering to apply let's update omitted steps in memory.
// This is important to bring internal state variables up-to-date with progress in time.
if (render) {
var droppedFrames = Math.round((now - lastFrame) / (millisecondsPerSecond / desiredFrames)) - 1;
for (var j = 0; j < Math.min(droppedFrames, 4); j++) {
step(true);
dropCounter++;
}
}
// Compute percent value
if (duration) {
percent = (now - start) / duration;
if (percent > 1) {
percent = 1;
}
}
// Execute step callback, then...
var value = easingMethod ? easingMethod(percent) : percent;
if ((stepCallback(value, now, render) === false || percent === 1) && render) {
running[id] = null;
completedCallback && completedCallback(desiredFrames - (dropCounter / ((now - start) / millisecondsPerSecond)), id, percent === 1 || duration == null);
} else if (render) {
lastFrame = now;
zyngaCore.effect.Animate.requestAnimationFrame(step, root);
}
};
// Mark as running
running[id] = true;
// Init first step
zyngaCore.effect.Animate.requestAnimationFrame(step, root);
// Return unique animation ID
return id;
}
};
})(window);
/*
* Scroller
* http://github.com/zynga/scroller
*
* Copyright 2011, Zynga Inc.
* Licensed under the MIT License.
* https://raw.github.com/zynga/scroller/master/MIT-LICENSE.txt
*
* Based on the work of: Unify Project (unify-project.org)
* http://unify-project.org
* Copyright 2011, Deutsche Telekom AG
* License: MIT + Apache (V2)
*/
(function(ionic) {
var NOOP = function(){};
// Easing Equations (c) 2003 Robert Penner, all rights reserved.
// Open source under the BSD License.
/**
* @param pos {Number} position between 0 (start of effect) and 1 (end of effect)
**/
var easeOutCubic = function(pos) {
return (Math.pow((pos - 1), 3) + 1);
};
/**
* @param pos {Number} position between 0 (start of effect) and 1 (end of effect)
**/
var easeInOutCubic = function(pos) {
if ((pos /= 0.5) < 1) {
return 0.5 * Math.pow(pos, 3);
}
return 0.5 * (Math.pow((pos - 2), 3) + 2);
};
/**
* ionic.views.Scroll
* A powerful scroll view with support for bouncing, pull to refresh, and paging.
* @param {Object} options options for the scroll view
* @class A scroll view system
* @memberof ionic.views
*/
ionic.views.Scroll = ionic.views.View.inherit({
initialize: function(options) {
var self = this;
self.__container = options.el;
self.__content = options.el.firstElementChild;
//Remove any scrollTop attached to these elements; they are virtual scroll now
//This also stops on-load-scroll-to-window.location.hash that the browser does
setTimeout(function() {
if (self.__container && self.__content) {
self.__container.scrollTop = 0;
self.__content.scrollTop = 0;
}
});
self.options = {
/** Disable scrolling on x-axis by default */
scrollingX: false,
scrollbarX: true,
/** Enable scrolling on y-axis */
scrollingY: true,
scrollbarY: true,
startX: 0,
startY: 0,
/** The amount to dampen mousewheel events */
wheelDampen: 6,
/** The minimum size the scrollbars scale to while scrolling */
minScrollbarSizeX: 5,
minScrollbarSizeY: 5,
/** Scrollbar fading after scrolling */
scrollbarsFade: true,
scrollbarFadeDelay: 300,
/** The initial fade delay when the pane is resized or initialized */
scrollbarResizeFadeDelay: 1000,
/** Enable animations for deceleration, snap back, zooming and scrolling */
animating: true,
/** duration for animations triggered by scrollTo/zoomTo */
animationDuration: 250,
/** The velocity required to make the scroll view "slide" after touchend */
decelVelocityThreshold: 4,
/** The velocity required to make the scroll view "slide" after touchend when using paging */
decelVelocityThresholdPaging: 4,
/** Enable bouncing (content can be slowly moved outside and jumps back after releasing) */
bouncing: true,
/** Enable locking to the main axis if user moves only slightly on one of them at start */
locking: true,
/** Enable pagination mode (switching between full page content panes) */
paging: false,
/** Enable snapping of content to a configured pixel grid */
snapping: false,
/** Enable zooming of content via API, fingers and mouse wheel */
zooming: false,
/** Minimum zoom level */
minZoom: 0.5,
/** Maximum zoom level */
maxZoom: 3,
/** Multiply or decrease scrolling speed **/
speedMultiplier: 1,
deceleration: 0.97,
/** Whether to prevent default on a scroll operation to capture drag events **/
preventDefault: false,
/** Callback that is fired on the later of touch end or deceleration end,
provided that another scrolling action has not begun. Used to know
when to fade out a scrollbar. */
scrollingComplete: NOOP,
/** This configures the amount of change applied to deceleration when reaching boundaries **/
penetrationDeceleration: 0.03,
/** This configures the amount of change applied to acceleration when reaching boundaries **/
penetrationAcceleration: 0.08,
// The ms interval for triggering scroll events
scrollEventInterval: 10,
freeze: false,
getContentWidth: function() {
return Math.max(self.__content.scrollWidth, self.__content.offsetWidth);
},
getContentHeight: function() {
return Math.max(self.__content.scrollHeight, self.__content.offsetHeight + (self.__content.offsetTop * 2));
}
};
for (var key in options) {
self.options[key] = options[key];
}
self.hintResize = ionic.debounce(function() {
self.resize();
}, 1000, true);
self.onScroll = function() {
if (!ionic.scroll.isScrolling) {
setTimeout(self.setScrollStart, 50);
} else {
clearTimeout(self.scrollTimer);
self.scrollTimer = setTimeout(self.setScrollStop, 80);
}
};
self.freeze = function(shouldFreeze) {
if (arguments.length) {
self.options.freeze = shouldFreeze;
}
return self.options.freeze;
};
// We can just use the standard freeze pop in our mouth
self.freezeShut = self.freeze;
self.setScrollStart = function() {
ionic.scroll.isScrolling = Math.abs(ionic.scroll.lastTop - self.__scrollTop) > 1;
clearTimeout(self.scrollTimer);
self.scrollTimer = setTimeout(self.setScrollStop, 80);
};
self.setScrollStop = function() {
ionic.scroll.isScrolling = false;
ionic.scroll.lastTop = self.__scrollTop;
};
self.triggerScrollEvent = ionic.throttle(function() {
self.onScroll();
ionic.trigger('scroll', {
scrollTop: self.__scrollTop,
scrollLeft: self.__scrollLeft,
target: self.__container
});
}, self.options.scrollEventInterval);
self.triggerScrollEndEvent = function() {
ionic.trigger('scrollend', {
scrollTop: self.__scrollTop,
scrollLeft: self.__scrollLeft,
target: self.__container
});
};
self.__scrollLeft = self.options.startX;
self.__scrollTop = self.options.startY;
// Get the render update function, initialize event handlers,
// and calculate the size of the scroll container
self.__callback = self.getRenderFn();
self.__initEventHandlers();
self.__createScrollbars();
},
run: function() {
this.resize();
// Fade them out
this.__fadeScrollbars('out', this.options.scrollbarResizeFadeDelay);
},
/*
---------------------------------------------------------------------------
INTERNAL FIELDS :: STATUS
---------------------------------------------------------------------------
*/
/** Whether only a single finger is used in touch handling */
__isSingleTouch: false,
/** Whether a touch event sequence is in progress */
__isTracking: false,
/** Whether a deceleration animation went to completion. */
__didDecelerationComplete: false,
/**
* Whether a gesture zoom/rotate event is in progress. Activates when
* a gesturestart event happens. This has higher priority than dragging.
*/
__isGesturing: false,
/**
* Whether the user has moved by such a distance that we have enabled
* dragging mode. Hint: It's only enabled after some pixels of movement to
* not interrupt with clicks etc.
*/
__isDragging: false,
/**
* Not touching and dragging anymore, and smoothly animating the
* touch sequence using deceleration.
*/
__isDecelerating: false,
/**
* Smoothly animating the currently configured change
*/
__isAnimating: false,
/*
---------------------------------------------------------------------------
INTERNAL FIELDS :: DIMENSIONS
---------------------------------------------------------------------------
*/
/** Available outer left position (from document perspective) */
__clientLeft: 0,
/** Available outer top position (from document perspective) */
__clientTop: 0,
/** Available outer width */
__clientWidth: 0,
/** Available outer height */
__clientHeight: 0,
/** Outer width of content */
__contentWidth: 0,
/** Outer height of content */
__contentHeight: 0,
/** Snapping width for content */
__snapWidth: 100,
/** Snapping height for content */
__snapHeight: 100,
/** Height to assign to refresh area */
__refreshHeight: null,
/** Whether the refresh process is enabled when the event is released now */
__refreshActive: false,
/** Callback to execute on activation. This is for signalling the user about a refresh is about to happen when he release */
__refreshActivate: null,
/** Callback to execute on deactivation. This is for signalling the user about the refresh being cancelled */
__refreshDeactivate: null,
/** Callback to execute to start the actual refresh. Call {@link #refreshFinish} when done */
__refreshStart: null,
/** Zoom level */
__zoomLevel: 1,
/** Scroll position on x-axis */
__scrollLeft: 0,
/** Scroll position on y-axis */
__scrollTop: 0,
/** Maximum allowed scroll position on x-axis */
__maxScrollLeft: 0,
/** Maximum allowed scroll position on y-axis */
__maxScrollTop: 0,
/* Scheduled left position (final position when animating) */
__scheduledLeft: 0,
/* Scheduled top position (final position when animating) */
__scheduledTop: 0,
/* Scheduled zoom level (final scale when animating) */
__scheduledZoom: 0,
/*
---------------------------------------------------------------------------
INTERNAL FIELDS :: LAST POSITIONS
---------------------------------------------------------------------------
*/
/** Left position of finger at start */
__lastTouchLeft: null,
/** Top position of finger at start */
__lastTouchTop: null,
/** Timestamp of last move of finger. Used to limit tracking range for deceleration speed. */
__lastTouchMove: null,
/** List of positions, uses three indexes for each state: left, top, timestamp */
__positions: null,
/*
---------------------------------------------------------------------------
INTERNAL FIELDS :: DECELERATION SUPPORT
---------------------------------------------------------------------------
*/
/** Minimum left scroll position during deceleration */
__minDecelerationScrollLeft: null,
/** Minimum top scroll position during deceleration */
__minDecelerationScrollTop: null,
/** Maximum left scroll position during deceleration */
__maxDecelerationScrollLeft: null,
/** Maximum top scroll position during deceleration */
__maxDecelerationScrollTop: null,
/** Current factor to modify horizontal scroll position with on every step */
__decelerationVelocityX: null,
/** Current factor to modify vertical scroll position with on every step */
__decelerationVelocityY: null,
/** the browser-specific property to use for transforms */
__transformProperty: null,
__perspectiveProperty: null,
/** scrollbar indicators */
__indicatorX: null,
__indicatorY: null,
/** Timeout for scrollbar fading */
__scrollbarFadeTimeout: null,
/** whether we've tried to wait for size already */
__didWaitForSize: null,
__sizerTimeout: null,
__initEventHandlers: function() {
var self = this;
// Event Handler
var container = self.__container;
// save height when scroll view is shrunk so we don't need to reflow
var scrollViewOffsetHeight;
/**
* Shrink the scroll view when the keyboard is up if necessary and if the
* focused input is below the bottom of the shrunk scroll view, scroll it
* into view.
*/
self.scrollChildIntoView = function(e) {
//console.log("scrollChildIntoView at: " + Date.now());
// D
var scrollBottomOffsetToTop = container.getBoundingClientRect().bottom;
// D - A
scrollViewOffsetHeight = container.offsetHeight;
var alreadyShrunk = self.isShrunkForKeyboard;
var isModal = container.parentNode.classList.contains('modal');
// 680px is when the media query for 60% modal width kicks in
var isInsetModal = isModal && window.innerWidth >= 680;
/*
* _______
* |---A---| <- top of scroll view
* | |
* |---B---| <- keyboard
* | C | <- input
* |---D---| <- initial bottom of scroll view
* |___E___| <- bottom of viewport
*
* All commented calculations relative to the top of the viewport (ie E
* is the viewport height, not 0)
*/
if (!alreadyShrunk) {
// shrink scrollview so we can actually scroll if the input is hidden
// if it isn't shrink so we can scroll to inputs under the keyboard
// inset modals won't shrink on Android on their own when the keyboard appears
if ( ionic.Platform.isIOS() || ionic.Platform.isFullScreen || isInsetModal ) {
// if there are things below the scroll view account for them and
// subtract them from the keyboard height when resizing
// E - D E D
var scrollBottomOffsetToBottom = e.detail.viewportHeight - scrollBottomOffsetToTop;
// 0 or D - B if D > B E - B E - D
var keyboardOffset = Math.max(0, e.detail.keyboardHeight - scrollBottomOffsetToBottom);
ionic.requestAnimationFrame(function(){
// D - A or B - A if D > B D - A max(0, D - B)
scrollViewOffsetHeight = scrollViewOffsetHeight - keyboardOffset;
container.style.height = scrollViewOffsetHeight + "px";
container.style.overflow = "visible";
//update scroll view
self.resize();
});
}
self.isShrunkForKeyboard = true;
}
/*
* _______
* |---A---| <- top of scroll view
* | * | <- where we want to scroll to
* |--B-D--| <- keyboard, bottom of scroll view
* | C | <- input
* | |
* |___E___| <- bottom of viewport
*
* All commented calculations relative to the top of the viewport (ie E
* is the viewport height, not 0)
*/
// if the element is positioned under the keyboard scroll it into view
if (e.detail.isElementUnderKeyboard) {
ionic.requestAnimationFrame(function(){
container.scrollTop = 0;
// update D if we shrunk
if (self.isShrunkForKeyboard && !alreadyShrunk) {
scrollBottomOffsetToTop = container.getBoundingClientRect().bottom;
}
// middle of the scrollview, this is where we want to scroll to
// (D - A) / 2
var scrollMidpointOffset = scrollViewOffsetHeight * 0.5;
//console.log("container.offsetHeight: " + scrollViewOffsetHeight);
// middle of the input we want to scroll into view
// C
var inputMidpoint = ((e.detail.elementBottom + e.detail.elementTop) / 2);
// distance from middle of input to the bottom of the scroll view
// C - D C D
var inputMidpointOffsetToScrollBottom = inputMidpoint - scrollBottomOffsetToTop;
//C - D + (D - A)/2 C - D (D - A)/ 2
var scrollTop = inputMidpointOffsetToScrollBottom + scrollMidpointOffset;
if ( scrollTop > 0) {
if (ionic.Platform.isIOS()) ionic.tap.cloneFocusedInput(container, self);
self.scrollBy(0, scrollTop, true);
self.onScroll();
}
});
}
// Only the first scrollView parent of the element that broadcasted this event
// (the active element that needs to be shown) should receive this event
e.stopPropagation();
};
self.resetScrollView = function() {
//return scrollview to original height once keyboard has hidden
if ( self.isShrunkForKeyboard ) {
self.isShrunkForKeyboard = false;
container.style.height = "";
container.style.overflow = "";
}
self.resize();
};
//Broadcasted when keyboard is shown on some platforms.
//See js/utils/keyboard.js
container.addEventListener('scrollChildIntoView', self.scrollChildIntoView);
// Listen on document because container may not have had the last
// keyboardActiveElement, for example after closing a modal with a focused
// input and returning to a previously resized scroll view in an ion-content.
// Since we can only resize scroll views that are currently visible, just resize
// the current scroll view when the keyboard is closed.
document.addEventListener('resetScrollView', self.resetScrollView);
function getEventTouches(e) {
return e.touches && e.touches.length ? e.touches : [{
pageX: e.pageX,
pageY: e.pageY
}];
}
self.touchStart = function(e) {
self.startCoordinates = ionic.tap.pointerCoord(e);
if ( ionic.tap.ignoreScrollStart(e) ) {
return;
}
self.__isDown = true;
if ( ionic.tap.containsOrIsTextInput(e.target) || e.target.tagName === 'SELECT' ) {
// do not start if the target is a text input
// if there is a touchmove on this input, then we can start the scroll
self.__hasStarted = false;
return;
}
self.__isSelectable = true;
self.__enableScrollY = true;
self.__hasStarted = true;
self.doTouchStart(getEventTouches(e), e.timeStamp);
e.preventDefault();
};
self.touchMove = function(e) {
if (self.options.freeze || !self.__isDown ||
(!self.__isDown && e.defaultPrevented) ||
(e.target.tagName === 'TEXTAREA' && e.target.parentElement.querySelector(':focus')) ) {
return;
}
if ( !self.__hasStarted && ( ionic.tap.containsOrIsTextInput(e.target) || e.target.tagName === 'SELECT' ) ) {
// the target is a text input and scroll has started
// since the text input doesn't start on touchStart, do it here
self.__hasStarted = true;
self.doTouchStart(getEventTouches(e), e.timeStamp);
e.preventDefault();
return;
}
if (self.startCoordinates) {
// we have start coordinates, so get this touch move's current coordinates
var currentCoordinates = ionic.tap.pointerCoord(e);
if ( self.__isSelectable &&
ionic.tap.isTextInput(e.target) &&
Math.abs(self.startCoordinates.x - currentCoordinates.x) > 20 ) {
// user slid the text input's caret on its x axis, disable any future y scrolling
self.__enableScrollY = false;
self.__isSelectable = true;
}
if ( self.__enableScrollY && Math.abs(self.startCoordinates.y - currentCoordinates.y) > 10 ) {
// user scrolled the entire view on the y axis
// disabled being able to select text on an input
// hide the input which has focus, and show a cloned one that doesn't have focus
self.__isSelectable = false;
ionic.tap.cloneFocusedInput(container, self);
}
}
self.doTouchMove(getEventTouches(e), e.timeStamp, e.scale);
self.__isDown = true;
};
self.touchMoveBubble = function(e) {
if(self.__isDown && self.options.preventDefault) {
e.preventDefault();
}
};
self.touchEnd = function(e) {
if (!self.__isDown) return;
self.doTouchEnd(e, e.timeStamp);
self.__isDown = false;
self.__hasStarted = false;
self.__isSelectable = true;
self.__enableScrollY = true;
if ( !self.__isDragging && !self.__isDecelerating && !self.__isAnimating ) {
ionic.tap.removeClonedInputs(container, self);
}
};
self.mouseWheel = ionic.animationFrameThrottle(function(e) {
var scrollParent = ionic.DomUtil.getParentOrSelfWithClass(e.target, 'ionic-scroll');
if (!self.options.freeze && scrollParent === self.__container) {
self.hintResize();
self.scrollBy(
(e.wheelDeltaX || e.deltaX || 0) / self.options.wheelDampen,
(-e.wheelDeltaY || e.deltaY || 0) / self.options.wheelDampen
);
self.__fadeScrollbars('in');
clearTimeout(self.__wheelHideBarTimeout);
self.__wheelHideBarTimeout = setTimeout(function() {
self.__fadeScrollbars('out');
}, 100);
}
});
if ('ontouchstart' in window) {
// Touch Events
container.addEventListener("touchstart", self.touchStart, false);
if(self.options.preventDefault) container.addEventListener("touchmove", self.touchMoveBubble, false);
document.addEventListener("touchmove", self.touchMove, false);
document.addEventListener("touchend", self.touchEnd, false);
document.addEventListener("touchcancel", self.touchEnd, false);
document.addEventListener("wheel", self.mouseWheel, false);
} else if (window.navigator.pointerEnabled) {
// Pointer Events
container.addEventListener("pointerdown", self.touchStart, false);
if(self.options.preventDefault) container.addEventListener("pointermove", self.touchMoveBubble, false);
document.addEventListener("pointermove", self.touchMove, false);
document.addEventListener("pointerup", self.touchEnd, false);
document.addEventListener("pointercancel", self.touchEnd, false);
document.addEventListener("wheel", self.mouseWheel, false);
} else if (window.navigator.msPointerEnabled) {
// IE10, WP8 (Pointer Events)
container.addEventListener("MSPointerDown", self.touchStart, false);
if(self.options.preventDefault) container.addEventListener("MSPointerMove", self.touchMoveBubble, false);
document.addEventListener("MSPointerMove", self.touchMove, false);
document.addEventListener("MSPointerUp", self.touchEnd, false);
document.addEventListener("MSPointerCancel", self.touchEnd, false);
document.addEventListener("wheel", self.mouseWheel, false);
} else {
// Mouse Events
var mousedown = false;
self.mouseDown = function(e) {
if ( ionic.tap.ignoreScrollStart(e) || e.target.tagName === 'SELECT' ) {
return;
}
self.doTouchStart(getEventTouches(e), e.timeStamp);
if ( !ionic.tap.isTextInput(e.target) ) {
e.preventDefault();
}
mousedown = true;
};
self.mouseMove = function(e) {
if (self.options.freeze || !mousedown || (!mousedown && e.defaultPrevented)) {
return;
}
self.doTouchMove(getEventTouches(e), e.timeStamp);
mousedown = true;
};
self.mouseMoveBubble = function(e) {
if (mousedown && self.options.preventDefault) {
e.preventDefault();
}
};
self.mouseUp = function(e) {
if (!mousedown) {
return;
}
self.doTouchEnd(e, e.timeStamp);
mousedown = false;
};
container.addEventListener("mousedown", self.mouseDown, false);
if(self.options.preventDefault) container.addEventListener("mousemove", self.mouseMoveBubble, false);
document.addEventListener("mousemove", self.mouseMove, false);
document.addEventListener("mouseup", self.mouseUp, false);
document.addEventListener('mousewheel', self.mouseWheel, false);
document.addEventListener('wheel', self.mouseWheel, false);
}
},
__cleanup: function() {
var self = this;
var container = self.__container;
container.removeEventListener('touchstart', self.touchStart);
container.removeEventListener('touchmove', self.touchMoveBubble);
document.removeEventListener('touchmove', self.touchMove);
document.removeEventListener('touchend', self.touchEnd);
document.removeEventListener('touchcancel', self.touchEnd);
container.removeEventListener("pointerdown", self.touchStart);
container.removeEventListener("pointermove", self.touchMoveBubble);
document.removeEventListener("pointermove", self.touchMove);
document.removeEventListener("pointerup", self.touchEnd);
document.removeEventListener("pointercancel", self.touchEnd);
container.removeEventListener("MSPointerDown", self.touchStart);
container.removeEventListener("MSPointerMove", self.touchMoveBubble);
document.removeEventListener("MSPointerMove", self.touchMove);
document.removeEventListener("MSPointerUp", self.touchEnd);
document.removeEventListener("MSPointerCancel", self.touchEnd);
container.removeEventListener("mousedown", self.mouseDown);
container.removeEventListener("mousemove", self.mouseMoveBubble);
document.removeEventListener("mousemove", self.mouseMove);
document.removeEventListener("mouseup", self.mouseUp);
document.removeEventListener('mousewheel', self.mouseWheel);
document.removeEventListener('wheel', self.mouseWheel);
container.removeEventListener('scrollChildIntoView', self.scrollChildIntoView);
document.removeEventListener('resetScrollView', self.resetScrollView);
ionic.tap.removeClonedInputs(container, self);
delete self.__container;
delete self.__content;
delete self.__indicatorX;
delete self.__indicatorY;
delete self.options.el;
self.__callback = self.scrollChildIntoView = self.resetScrollView = NOOP;
self.mouseMove = self.mouseDown = self.mouseUp = self.mouseWheel =
self.touchStart = self.touchMove = self.touchEnd = self.touchCancel = NOOP;
self.resize = self.scrollTo = self.zoomTo =
self.__scrollingComplete = NOOP;
container = null;
},
/** Create a scroll bar div with the given direction **/
__createScrollbar: function(direction) {
var bar = document.createElement('div'),
indicator = document.createElement('div');
indicator.className = 'scroll-bar-indicator scroll-bar-fade-out';
if (direction == 'h') {
bar.className = 'scroll-bar scroll-bar-h';
} else {
bar.className = 'scroll-bar scroll-bar-v';
}
bar.appendChild(indicator);
return bar;
},
__createScrollbars: function() {
var self = this;
var indicatorX, indicatorY;
if (self.options.scrollingX) {
indicatorX = {
el: self.__createScrollbar('h'),
sizeRatio: 1
};
indicatorX.indicator = indicatorX.el.children[0];
if (self.options.scrollbarX) {
self.__container.appendChild(indicatorX.el);
}
self.__indicatorX = indicatorX;
}
if (self.options.scrollingY) {
indicatorY = {
el: self.__createScrollbar('v'),
sizeRatio: 1
};
indicatorY.indicator = indicatorY.el.children[0];
if (self.options.scrollbarY) {
self.__container.appendChild(indicatorY.el);
}
self.__indicatorY = indicatorY;
}
},
__resizeScrollbars: function() {
var self = this;
// Update horiz bar
if (self.__indicatorX) {
var width = Math.max(Math.round(self.__clientWidth * self.__clientWidth / (self.__contentWidth)), 20);
if (width > self.__contentWidth) {
width = 0;
}
if (width !== self.__indicatorX.size) {
ionic.requestAnimationFrame(function(){
self.__indicatorX.indicator.style.width = width + 'px';
});
}
self.__indicatorX.size = width;
self.__indicatorX.minScale = self.options.minScrollbarSizeX / width;
self.__indicatorX.maxPos = self.__clientWidth - width;
self.__indicatorX.sizeRatio = self.__maxScrollLeft ? self.__indicatorX.maxPos / self.__maxScrollLeft : 1;
}
// Update vert bar
if (self.__indicatorY) {
var height = Math.max(Math.round(self.__clientHeight * self.__clientHeight / (self.__contentHeight)), 20);
if (height > self.__contentHeight) {
height = 0;
}
if (height !== self.__indicatorY.size) {
ionic.requestAnimationFrame(function(){
self.__indicatorY && (self.__indicatorY.indicator.style.height = height + 'px');
});
}
self.__indicatorY.size = height;
self.__indicatorY.minScale = self.options.minScrollbarSizeY / height;
self.__indicatorY.maxPos = self.__clientHeight - height;
self.__indicatorY.sizeRatio = self.__maxScrollTop ? self.__indicatorY.maxPos / self.__maxScrollTop : 1;
}
},
/**
* Move and scale the scrollbars as the page scrolls.
*/
__repositionScrollbars: function() {
var self = this,
heightScale, widthScale,
widthDiff, heightDiff,
x, y,
xstop = 0, ystop = 0;
if (self.__indicatorX) {
// Handle the X scrollbar
// Don't go all the way to the right if we have a vertical scrollbar as well
if (self.__indicatorY) xstop = 10;
x = Math.round(self.__indicatorX.sizeRatio * self.__scrollLeft) || 0;
// The the difference between the last content X position, and our overscrolled one
widthDiff = self.__scrollLeft - (self.__maxScrollLeft - xstop);
if (self.__scrollLeft < 0) {
widthScale = Math.max(self.__indicatorX.minScale,
(self.__indicatorX.size - Math.abs(self.__scrollLeft)) / self.__indicatorX.size);
// Stay at left
x = 0;
// Make sure scale is transformed from the left/center origin point
self.__indicatorX.indicator.style[self.__transformOriginProperty] = 'left center';
} else if (widthDiff > 0) {
widthScale = Math.max(self.__indicatorX.minScale,
(self.__indicatorX.size - widthDiff) / self.__indicatorX.size);
// Stay at the furthest x for the scrollable viewport
x = self.__indicatorX.maxPos - xstop;
// Make sure scale is transformed from the right/center origin point
self.__indicatorX.indicator.style[self.__transformOriginProperty] = 'right center';
} else {
// Normal motion
x = Math.min(self.__maxScrollLeft, Math.max(0, x));
widthScale = 1;
}
var translate3dX = 'translate3d(' + x + 'px, 0, 0) scaleX(' + widthScale + ')';
if (self.__indicatorX.transformProp !== translate3dX) {
self.__indicatorX.indicator.style[self.__transformProperty] = translate3dX;
self.__indicatorX.transformProp = translate3dX;
}
}
if (self.__indicatorY) {
y = Math.round(self.__indicatorY.sizeRatio * self.__scrollTop) || 0;
// Don't go all the way to the right if we have a vertical scrollbar as well
if (self.__indicatorX) ystop = 10;
heightDiff = self.__scrollTop - (self.__maxScrollTop - ystop);
if (self.__scrollTop < 0) {
heightScale = Math.max(self.__indicatorY.minScale, (self.__indicatorY.size - Math.abs(self.__scrollTop)) / self.__indicatorY.size);
// Stay at top
y = 0;
// Make sure scale is transformed from the center/top origin point
if (self.__indicatorY.originProp !== 'center top') {
self.__indicatorY.indicator.style[self.__transformOriginProperty] = 'center top';
self.__indicatorY.originProp = 'center top';
}
} else if (heightDiff > 0) {
heightScale = Math.max(self.__indicatorY.minScale, (self.__indicatorY.size - heightDiff) / self.__indicatorY.size);
// Stay at bottom of scrollable viewport
y = self.__indicatorY.maxPos - ystop;
// Make sure scale is transformed from the center/bottom origin point
if (self.__indicatorY.originProp !== 'center bottom') {
self.__indicatorY.indicator.style[self.__transformOriginProperty] = 'center bottom';
self.__indicatorY.originProp = 'center bottom';
}
} else {
// Normal motion
y = Math.min(self.__maxScrollTop, Math.max(0, y));
heightScale = 1;
}
var translate3dY = 'translate3d(0,' + y + 'px, 0) scaleY(' + heightScale + ')';
if (self.__indicatorY.transformProp !== translate3dY) {
self.__indicatorY.indicator.style[self.__transformProperty] = translate3dY;
self.__indicatorY.transformProp = translate3dY;
}
}
},
__fadeScrollbars: function(direction, delay) {
var self = this;
if (!self.options.scrollbarsFade) {
return;
}
var className = 'scroll-bar-fade-out';
if (self.options.scrollbarsFade === true) {
clearTimeout(self.__scrollbarFadeTimeout);
if (direction == 'in') {
if (self.__indicatorX) { self.__indicatorX.indicator.classList.remove(className); }
if (self.__indicatorY) { self.__indicatorY.indicator.classList.remove(className); }
} else {
self.__scrollbarFadeTimeout = setTimeout(function() {
if (self.__indicatorX) { self.__indicatorX.indicator.classList.add(className); }
if (self.__indicatorY) { self.__indicatorY.indicator.classList.add(className); }
}, delay || self.options.scrollbarFadeDelay);
}
}
},
__scrollingComplete: function() {
this.options.scrollingComplete();
ionic.tap.removeClonedInputs(this.__container, this);
this.__fadeScrollbars('out');
},
resize: function(continueScrolling) {
var self = this;
if (!self.__container || !self.options) return;
// Update Scroller dimensions for changed content
// Add padding to bottom of content
self.setDimensions(
self.__container.clientWidth,
self.__container.clientHeight,
self.options.getContentWidth(),
self.options.getContentHeight(),
continueScrolling
);
},
/*
---------------------------------------------------------------------------
PUBLIC API
---------------------------------------------------------------------------
*/
getRenderFn: function() {
var self = this;
var content = self.__content;
var docStyle = document.documentElement.style;
var engine;
if ('MozAppearance' in docStyle) {
engine = 'gecko';
} else if ('WebkitAppearance' in docStyle) {
engine = 'webkit';
} else if (typeof navigator.cpuClass === 'string') {
engine = 'trident';
}
var vendorPrefix = {
trident: 'ms',
gecko: 'Moz',
webkit: 'Webkit',
presto: 'O'
}[engine];
var helperElem = document.createElement("div");
var undef;
var perspectiveProperty = vendorPrefix + "Perspective";
var transformProperty = vendorPrefix + "Transform";
var transformOriginProperty = vendorPrefix + 'TransformOrigin';
self.__perspectiveProperty = transformProperty;
self.__transformProperty = transformProperty;
self.__transformOriginProperty = transformOriginProperty;
if (helperElem.style[perspectiveProperty] !== undef) {
return function(left, top, zoom, wasResize) {
var translate3d = 'translate3d(' + (-left) + 'px,' + (-top) + 'px,0) scale(' + zoom + ')';
if (translate3d !== self.contentTransform) {
content.style[transformProperty] = translate3d;
self.contentTransform = translate3d;
}
self.__repositionScrollbars();
if (!wasResize) {
self.triggerScrollEvent();
}
};
} else if (helperElem.style[transformProperty] !== undef) {
return function(left, top, zoom, wasResize) {
content.style[transformProperty] = 'translate(' + (-left) + 'px,' + (-top) + 'px) scale(' + zoom + ')';
self.__repositionScrollbars();
if (!wasResize) {
self.triggerScrollEvent();
}
};
} else {
return function(left, top, zoom, wasResize) {
content.style.marginLeft = left ? (-left / zoom) + 'px' : '';
content.style.marginTop = top ? (-top / zoom) + 'px' : '';
content.style.zoom = zoom || '';
self.__repositionScrollbars();
if (!wasResize) {
self.triggerScrollEvent();
}
};
}
},
/**
* Configures the dimensions of the client (outer) and content (inner) elements.
* Requires the available space for the outer element and the outer size of the inner element.
* All values which are falsy (null or zero etc.) are ignored and the old value is kept.
*
* @param clientWidth {Integer} Inner width of outer element
* @param clientHeight {Integer} Inner height of outer element
* @param contentWidth {Integer} Outer width of inner element
* @param contentHeight {Integer} Outer height of inner element
*/
setDimensions: function(clientWidth, clientHeight, contentWidth, contentHeight, continueScrolling) {
var self = this;
if (!clientWidth && !clientHeight && !contentWidth && !contentHeight) {
// this scrollview isn't rendered, don't bother
return;
}
// Only update values which are defined
if (clientWidth === +clientWidth) {
self.__clientWidth = clientWidth;
}
if (clientHeight === +clientHeight) {
self.__clientHeight = clientHeight;
}
if (contentWidth === +contentWidth) {
self.__contentWidth = contentWidth;
}
if (contentHeight === +contentHeight) {
self.__contentHeight = contentHeight;
}
// Refresh maximums
self.__computeScrollMax();
self.__resizeScrollbars();
// Refresh scroll position
if (!continueScrolling) {
self.scrollTo(self.__scrollLeft, self.__scrollTop, true, null, true);
}
},
/**
* Sets the client coordinates in relation to the document.
*
* @param left {Integer} Left position of outer element
* @param top {Integer} Top position of outer element
*/
setPosition: function(left, top) {
this.__clientLeft = left || 0;
this.__clientTop = top || 0;
},
/**
* Configures the snapping (when snapping is active)
*
* @param width {Integer} Snapping width
* @param height {Integer} Snapping height
*/
setSnapSize: function(width, height) {
this.__snapWidth = width;
this.__snapHeight = height;
},
/**
* Activates pull-to-refresh. A special zone on the top of the list to start a list refresh whenever
* the user event is released during visibility of this zone. This was introduced by some apps on iOS like
* the official Twitter client.
*
* @param height {Integer} Height of pull-to-refresh zone on top of rendered list
* @param activateCallback {Function} Callback to execute on activation. This is for signalling the user about a refresh is about to happen when he release.
* @param deactivateCallback {Function} Callback to execute on deactivation. This is for signalling the user about the refresh being cancelled.
* @param startCallback {Function} Callback to execute to start the real async refresh action. Call {@link #finishPullToRefresh} after finish of refresh.
* @param showCallback {Function} Callback to execute when the refresher should be shown. This is for showing the refresher during a negative scrollTop.
* @param hideCallback {Function} Callback to execute when the refresher should be hidden. This is for hiding the refresher when it's behind the nav bar.
* @param tailCallback {Function} Callback to execute just before the refresher returns to it's original state. This is for zooming out the refresher.
* @param pullProgressCallback Callback to state the progress while pulling to refresh
*/
activatePullToRefresh: function(height, refresherMethods) {
var self = this;
self.__refreshHeight = height;
self.__refreshActivate = function() { ionic.requestAnimationFrame(refresherMethods.activate); };
self.__refreshDeactivate = function() { ionic.requestAnimationFrame(refresherMethods.deactivate); };
self.__refreshStart = function() { ionic.requestAnimationFrame(refresherMethods.start); };
self.__refreshShow = function() { ionic.requestAnimationFrame(refresherMethods.show); };
self.__refreshHide = function() { ionic.requestAnimationFrame(refresherMethods.hide); };
self.__refreshTail = function() { ionic.requestAnimationFrame(refresherMethods.tail); };
self.__refreshTailTime = 100;
self.__minSpinTime = 600;
},
/**
* Starts pull-to-refresh manually.
*/
triggerPullToRefresh: function() {
// Use publish instead of scrollTo to allow scrolling to out of boundary position
// We don't need to normalize scrollLeft, zoomLevel, etc. here because we only y-scrolling when pull-to-refresh is enabled
this.__publish(this.__scrollLeft, -this.__refreshHeight, this.__zoomLevel, true);
var d = new Date();
this.refreshStartTime = d.getTime();
if (this.__refreshStart) {
this.__refreshStart();
}
},
/**
* Signalizes that pull-to-refresh is finished.
*/
finishPullToRefresh: function() {
var self = this;
// delay to make sure the spinner has a chance to spin for a split second before it's dismissed
var d = new Date();
var delay = 0;
if (self.refreshStartTime + self.__minSpinTime > d.getTime()) {
delay = self.refreshStartTime + self.__minSpinTime - d.getTime();
}
setTimeout(function() {
if (self.__refreshTail) {
self.__refreshTail();
}
setTimeout(function() {
self.__refreshActive = false;
if (self.__refreshDeactivate) {
self.__refreshDeactivate();
}
if (self.__refreshHide) {
self.__refreshHide();
}
self.scrollTo(self.__scrollLeft, self.__scrollTop, true);
}, self.__refreshTailTime);
}, delay);
},
/**
* Returns the scroll position and zooming values
*
* @return {Map} `left` and `top` scroll position and `zoom` level
*/
getValues: function() {
return {
left: this.__scrollLeft,
top: this.__scrollTop,
zoom: this.__zoomLevel
};
},
/**
* Returns the maximum scroll values
*
* @return {Map} `left` and `top` maximum scroll values
*/
getScrollMax: function() {
return {
left: this.__maxScrollLeft,
top: this.__maxScrollTop
};
},
/**
* Zooms to the given level. Supports optional animation. Zooms
* the center when no coordinates are given.
*
* @param level {Number} Level to zoom to
* @param animate {Boolean} Whether to use animation
* @param originLeft {Number} Zoom in at given left coordinate
* @param originTop {Number} Zoom in at given top coordinate
*/
zoomTo: function(level, animate, originLeft, originTop) {
var self = this;
if (!self.options.zooming) {
throw new Error("Zooming is not enabled!");
}
// Stop deceleration
if (self.__isDecelerating) {
zyngaCore.effect.Animate.stop(self.__isDecelerating);
self.__isDecelerating = false;
}
var oldLevel = self.__zoomLevel;
// Normalize input origin to center of viewport if not defined
if (originLeft == null) {
originLeft = self.__clientWidth / 2;
}
if (originTop == null) {
originTop = self.__clientHeight / 2;
}
// Limit level according to configuration
level = Math.max(Math.min(level, self.options.maxZoom), self.options.minZoom);
// Recompute maximum values while temporary tweaking maximum scroll ranges
self.__computeScrollMax(level);
// Recompute left and top coordinates based on new zoom level
var left = ((originLeft + self.__scrollLeft) * level / oldLevel) - originLeft;
var top = ((originTop + self.__scrollTop) * level / oldLevel) - originTop;
// Limit x-axis
if (left > self.__maxScrollLeft) {
left = self.__maxScrollLeft;
} else if (left < 0) {
left = 0;
}
// Limit y-axis
if (top > self.__maxScrollTop) {
top = self.__maxScrollTop;
} else if (top < 0) {
top = 0;
}
// Push values out
self.__publish(left, top, level, animate);
},
/**
* Zooms the content by the given factor.
*
* @param factor {Number} Zoom by given factor
* @param animate {Boolean} Whether to use animation
* @param originLeft {Number} Zoom in at given left coordinate
* @param originTop {Number} Zoom in at given top coordinate
*/
zoomBy: function(factor, animate, originLeft, originTop) {
this.zoomTo(this.__zoomLevel * factor, animate, originLeft, originTop);
},
/**
* Scrolls to the given position. Respect limitations and snapping automatically.
*
* @param left {Number} Horizontal scroll position, keeps current if value is <code>null</code>
* @param top {Number} Vertical scroll position, keeps current if value is <code>null</code>
* @param animate {Boolean} Whether the scrolling should happen using an animation
* @param zoom {Number} Zoom level to go to
*/
scrollTo: function(left, top, animate, zoom, wasResize) {
var self = this;
// Stop deceleration
if (self.__isDecelerating) {
zyngaCore.effect.Animate.stop(self.__isDecelerating);
self.__isDecelerating = false;
}
// Correct coordinates based on new zoom level
if (zoom != null && zoom !== self.__zoomLevel) {
if (!self.options.zooming) {
throw new Error("Zooming is not enabled!");
}
left *= zoom;
top *= zoom;
// Recompute maximum values while temporary tweaking maximum scroll ranges
self.__computeScrollMax(zoom);
} else {
// Keep zoom when not defined
zoom = self.__zoomLevel;
}
if (!self.options.scrollingX) {
left = self.__scrollLeft;
} else {
if (self.options.paging) {
left = Math.round(left / self.__clientWidth) * self.__clientWidth;
} else if (self.options.snapping) {
left = Math.round(left / self.__snapWidth) * self.__snapWidth;
}
}
if (!self.options.scrollingY) {
top = self.__scrollTop;
} else {
if (self.options.paging) {
top = Math.round(top / self.__clientHeight) * self.__clientHeight;
} else if (self.options.snapping) {
top = Math.round(top / self.__snapHeight) * self.__snapHeight;
}
}
// Limit for allowed ranges
left = Math.max(Math.min(self.__maxScrollLeft, left), 0);
top = Math.max(Math.min(self.__maxScrollTop, top), 0);
// Don't animate when no change detected, still call publish to make sure
// that rendered position is really in-sync with internal data
if (left === self.__scrollLeft && top === self.__scrollTop) {
animate = false;
}
// Publish new values
self.__publish(left, top, zoom, animate, wasResize);
},
/**
* Scroll by the given offset
*
* @param left {Number} Scroll x-axis by given offset
* @param top {Number} Scroll y-axis by given offset
* @param animate {Boolean} Whether to animate the given change
*/
scrollBy: function(left, top, animate) {
var self = this;
var startLeft = self.__isAnimating ? self.__scheduledLeft : self.__scrollLeft;
var startTop = self.__isAnimating ? self.__scheduledTop : self.__scrollTop;
self.scrollTo(startLeft + (left || 0), startTop + (top || 0), animate);
},
/*
---------------------------------------------------------------------------
EVENT CALLBACKS
---------------------------------------------------------------------------
*/
/**
* Mouse wheel handler for zooming support
*/
doMouseZoom: function(wheelDelta, timeStamp, pageX, pageY) {
var change = wheelDelta > 0 ? 0.97 : 1.03;
return this.zoomTo(this.__zoomLevel * change, false, pageX - this.__clientLeft, pageY - this.__clientTop);
},
/**
* Touch start handler for scrolling support
*/
doTouchStart: function(touches, timeStamp) {
var self = this;
// remember if the deceleration was just stopped
self.__decStopped = !!(self.__isDecelerating || self.__isAnimating);
self.hintResize();
if (timeStamp instanceof Date) {
timeStamp = timeStamp.valueOf();
}
if (typeof timeStamp !== "number") {
timeStamp = Date.now();
}
// Reset interruptedAnimation flag
self.__interruptedAnimation = true;
// Stop deceleration
if (self.__isDecelerating) {
zyngaCore.effect.Animate.stop(self.__isDecelerating);
self.__isDecelerating = false;
self.__interruptedAnimation = true;
}
// Stop animation
if (self.__isAnimating) {
zyngaCore.effect.Animate.stop(self.__isAnimating);
self.__isAnimating = false;
self.__interruptedAnimation = true;
}
// Use center point when dealing with two fingers
var currentTouchLeft, currentTouchTop;
var isSingleTouch = touches.length === 1;
if (isSingleTouch) {
currentTouchLeft = touches[0].pageX;
currentTouchTop = touches[0].pageY;
} else {
currentTouchLeft = Math.abs(touches[0].pageX + touches[1].pageX) / 2;
currentTouchTop = Math.abs(touches[0].pageY + touches[1].pageY) / 2;
}
// Store initial positions
self.__initialTouchLeft = currentTouchLeft;
self.__initialTouchTop = currentTouchTop;
// Store initial touchList for scale calculation
self.__initialTouches = touches;
// Store current zoom level
self.__zoomLevelStart = self.__zoomLevel;
// Store initial touch positions
self.__lastTouchLeft = currentTouchLeft;
self.__lastTouchTop = currentTouchTop;
// Store initial move time stamp
self.__lastTouchMove = timeStamp;
// Reset initial scale
self.__lastScale = 1;
// Reset locking flags
self.__enableScrollX = !isSingleTouch && self.options.scrollingX;
self.__enableScrollY = !isSingleTouch && self.options.scrollingY;
// Reset tracking flag
self.__isTracking = true;
// Reset deceleration complete flag
self.__didDecelerationComplete = false;
// Dragging starts directly with two fingers, otherwise lazy with an offset
self.__isDragging = !isSingleTouch;
// Some features are disabled in multi touch scenarios
self.__isSingleTouch = isSingleTouch;
// Clearing data structure
self.__positions = [];
},
/**
* Touch move handler for scrolling support
*/
doTouchMove: function(touches, timeStamp, scale) {
if (timeStamp instanceof Date) {
timeStamp = timeStamp.valueOf();
}
if (typeof timeStamp !== "number") {
timeStamp = Date.now();
}
var self = this;
// Ignore event when tracking is not enabled (event might be outside of element)
if (!self.__isTracking) {
return;
}
var currentTouchLeft, currentTouchTop;
// Compute move based around of center of fingers
if (touches.length === 2) {
currentTouchLeft = Math.abs(touches[0].pageX + touches[1].pageX) / 2;
currentTouchTop = Math.abs(touches[0].pageY + touches[1].pageY) / 2;
// Calculate scale when not present and only when touches are used
if (!scale && self.options.zooming) {
scale = self.__getScale(self.__initialTouches, touches);
}
} else {
currentTouchLeft = touches[0].pageX;
currentTouchTop = touches[0].pageY;
}
var positions = self.__positions;
// Are we already is dragging mode?
if (self.__isDragging) {
self.__decStopped = false;
// Compute move distance
var moveX = currentTouchLeft - self.__lastTouchLeft;
var moveY = currentTouchTop - self.__lastTouchTop;
// Read previous scroll position and zooming
var scrollLeft = self.__scrollLeft;
var scrollTop = self.__scrollTop;
var level = self.__zoomLevel;
// Work with scaling
if (scale != null && self.options.zooming) {
var oldLevel = level;
// Recompute level based on previous scale and new scale
level = level / self.__lastScale * scale;
// Limit level according to configuration
level = Math.max(Math.min(level, self.options.maxZoom), self.options.minZoom);
// Only do further compution when change happened
if (oldLevel !== level) {
// Compute relative event position to container
var currentTouchLeftRel = currentTouchLeft - self.__clientLeft;
var currentTouchTopRel = currentTouchTop - self.__clientTop;
// Recompute left and top coordinates based on new zoom level
scrollLeft = ((currentTouchLeftRel + scrollLeft) * level / oldLevel) - currentTouchLeftRel;
scrollTop = ((currentTouchTopRel + scrollTop) * level / oldLevel) - currentTouchTopRel;
// Recompute max scroll values
self.__computeScrollMax(level);
}
}
if (self.__enableScrollX) {
scrollLeft -= moveX * self.options.speedMultiplier;
var maxScrollLeft = self.__maxScrollLeft;
if (scrollLeft > maxScrollLeft || scrollLeft < 0) {
// Slow down on the edges
if (self.options.bouncing) {
scrollLeft += (moveX / 2 * self.options.speedMultiplier);
} else if (scrollLeft > maxScrollLeft) {
scrollLeft = maxScrollLeft;
} else {
scrollLeft = 0;
}
}
}
// Compute new vertical scroll position
if (self.__enableScrollY) {
scrollTop -= moveY * self.options.speedMultiplier;
var maxScrollTop = self.__maxScrollTop;
if (scrollTop > maxScrollTop || scrollTop < 0) {
// Slow down on the edges
if (self.options.bouncing || (self.__refreshHeight && scrollTop < 0)) {
scrollTop += (moveY / 2 * self.options.speedMultiplier);
// Support pull-to-refresh (only when only y is scrollable)
if (!self.__enableScrollX && self.__refreshHeight != null) {
// hide the refresher when it's behind the header bar in case of header transparency
if (scrollTop < 0) {
self.__refreshHidden = false;
self.__refreshShow();
} else {
self.__refreshHide();
self.__refreshHidden = true;
}
if (!self.__refreshActive && scrollTop <= -self.__refreshHeight) {
self.__refreshActive = true;
if (self.__refreshActivate) {
self.__refreshActivate();
}
} else if (self.__refreshActive && scrollTop > -self.__refreshHeight) {
self.__refreshActive = false;
if (self.__refreshDeactivate) {
self.__refreshDeactivate();
}
}
}
} else if (scrollTop > maxScrollTop) {
scrollTop = maxScrollTop;
} else {
scrollTop = 0;
}
} else if (self.__refreshHeight && !self.__refreshHidden) {
// if a positive scroll value and the refresher is still not hidden, hide it
self.__refreshHide();
self.__refreshHidden = true;
}
}
// Keep list from growing infinitely (holding min 10, max 20 measure points)
if (positions.length > 60) {
positions.splice(0, 30);
}
// Track scroll movement for decleration
positions.push(scrollLeft, scrollTop, timeStamp);
// Sync scroll position
self.__publish(scrollLeft, scrollTop, level);
// Otherwise figure out whether we are switching into dragging mode now.
} else {
var minimumTrackingForScroll = self.options.locking ? 3 : 0;
var minimumTrackingForDrag = 5;
var distanceX = Math.abs(currentTouchLeft - self.__initialTouchLeft);
var distanceY = Math.abs(currentTouchTop - self.__initialTouchTop);
self.__enableScrollX = self.options.scrollingX && distanceX >= minimumTrackingForScroll;
self.__enableScrollY = self.options.scrollingY && distanceY >= minimumTrackingForScroll;
positions.push(self.__scrollLeft, self.__scrollTop, timeStamp);
self.__isDragging = (self.__enableScrollX || self.__enableScrollY) && (distanceX >= minimumTrackingForDrag || distanceY >= minimumTrackingForDrag);
if (self.__isDragging) {
self.__interruptedAnimation = false;
self.__fadeScrollbars('in');
}
}
// Update last touch positions and time stamp for next event
self.__lastTouchLeft = currentTouchLeft;
self.__lastTouchTop = currentTouchTop;
self.__lastTouchMove = timeStamp;
self.__lastScale = scale;
},
/**
* Touch end handler for scrolling support
*/
doTouchEnd: function(e, timeStamp) {
if (timeStamp instanceof Date) {
timeStamp = timeStamp.valueOf();
}
if (typeof timeStamp !== "number") {
timeStamp = Date.now();
}
var self = this;
// Ignore event when tracking is not enabled (no touchstart event on element)
// This is required as this listener ('touchmove') sits on the document and not on the element itself.
if (!self.__isTracking) {
return;
}
// Not touching anymore (when two finger hit the screen there are two touch end events)
self.__isTracking = false;
// Be sure to reset the dragging flag now. Here we also detect whether
// the finger has moved fast enough to switch into a deceleration animation.
if (self.__isDragging) {
// Reset dragging flag
self.__isDragging = false;
// Start deceleration
// Verify that the last move detected was in some relevant time frame
if (self.__isSingleTouch && self.options.animating && (timeStamp - self.__lastTouchMove) <= 100) {
// Then figure out what the scroll position was about 100ms ago
var positions = self.__positions;
var endPos = positions.length - 1;
var startPos = endPos;
// Move pointer to position measured 100ms ago
for (var i = endPos; i > 0 && positions[i] > (self.__lastTouchMove - 100); i -= 3) {
startPos = i;
}
// If start and stop position is identical in a 100ms timeframe,
// we cannot compute any useful deceleration.
if (startPos !== endPos) {
// Compute relative movement between these two points
var timeOffset = positions[endPos] - positions[startPos];
var movedLeft = self.__scrollLeft - positions[startPos - 2];
var movedTop = self.__scrollTop - positions[startPos - 1];
// Based on 50ms compute the movement to apply for each render step
self.__decelerationVelocityX = movedLeft / timeOffset * (1000 / 60);
self.__decelerationVelocityY = movedTop / timeOffset * (1000 / 60);
// How much velocity is required to start the deceleration
var minVelocityToStartDeceleration = self.options.paging || self.options.snapping ? self.options.decelVelocityThresholdPaging : self.options.decelVelocityThreshold;
// Verify that we have enough velocity to start deceleration
if (Math.abs(self.__decelerationVelocityX) > minVelocityToStartDeceleration || Math.abs(self.__decelerationVelocityY) > minVelocityToStartDeceleration) {
// Deactivate pull-to-refresh when decelerating
if (!self.__refreshActive) {
self.__startDeceleration(timeStamp);
}
}
} else {
self.__scrollingComplete();
}
} else if ((timeStamp - self.__lastTouchMove) > 100) {
self.__scrollingComplete();
}
} else if (self.__decStopped) {
// the deceleration was stopped
// user flicked the scroll fast, and stop dragging, then did a touchstart to stop the srolling
// tell the touchend event code to do nothing, we don't want to actually send a click
e.isTapHandled = true;
self.__decStopped = false;
}
// If this was a slower move it is per default non decelerated, but this
// still means that we want snap back to the bounds which is done here.
// This is placed outside the condition above to improve edge case stability
// e.g. touchend fired without enabled dragging. This should normally do not
// have modified the scroll positions or even showed the scrollbars though.
if (!self.__isDecelerating) {
if (self.__refreshActive && self.__refreshStart) {
// Use publish instead of scrollTo to allow scrolling to out of boundary position
// We don't need to normalize scrollLeft, zoomLevel, etc. here because we only y-scrolling when pull-to-refresh is enabled
self.__publish(self.__scrollLeft, -self.__refreshHeight, self.__zoomLevel, true);
var d = new Date();
self.refreshStartTime = d.getTime();
if (self.__refreshStart) {
self.__refreshStart();
}
// for iOS-ey style scrolling
if (!ionic.Platform.isAndroid())self.__startDeceleration();
} else {
if (self.__interruptedAnimation || self.__isDragging) {
self.__scrollingComplete();
}
self.scrollTo(self.__scrollLeft, self.__scrollTop, true, self.__zoomLevel);
// Directly signalize deactivation (nothing todo on refresh?)
if (self.__refreshActive) {
self.__refreshActive = false;
if (self.__refreshDeactivate) {
self.__refreshDeactivate();
}
}
}
}
// Fully cleanup list
self.__positions.length = 0;
},
/*
---------------------------------------------------------------------------
PRIVATE API
---------------------------------------------------------------------------
*/
/**
* Applies the scroll position to the content element
*
* @param left {Number} Left scroll position
* @param top {Number} Top scroll position
* @param animate {Boolean} Whether animation should be used to move to the new coordinates
*/
__publish: function(left, top, zoom, animate, wasResize) {
var self = this;
// Remember whether we had an animation, then we try to continue based on the current "drive" of the animation
var wasAnimating = self.__isAnimating;
if (wasAnimating) {
zyngaCore.effect.Animate.stop(wasAnimating);
self.__isAnimating = false;
}
if (animate && self.options.animating) {
// Keep scheduled positions for scrollBy/zoomBy functionality
self.__scheduledLeft = left;
self.__scheduledTop = top;
self.__scheduledZoom = zoom;
var oldLeft = self.__scrollLeft;
var oldTop = self.__scrollTop;
var oldZoom = self.__zoomLevel;
var diffLeft = left - oldLeft;
var diffTop = top - oldTop;
var diffZoom = zoom - oldZoom;
var step = function(percent, now, render) {
if (render) {
self.__scrollLeft = oldLeft + (diffLeft * percent);
self.__scrollTop = oldTop + (diffTop * percent);
self.__zoomLevel = oldZoom + (diffZoom * percent);
// Push values out
if (self.__callback) {
self.__callback(self.__scrollLeft, self.__scrollTop, self.__zoomLevel, wasResize);
}
}
};
var verify = function(id) {
return self.__isAnimating === id;
};
var completed = function(renderedFramesPerSecond, animationId, wasFinished) {
if (animationId === self.__isAnimating) {
self.__isAnimating = false;
}
if (self.__didDecelerationComplete || wasFinished) {
self.__scrollingComplete();
}
if (self.options.zooming) {
self.__computeScrollMax();
}
};
// When continuing based on previous animation we choose an ease-out animation instead of ease-in-out
self.__isAnimating = zyngaCore.effect.Animate.start(step, verify, completed, self.options.animationDuration, wasAnimating ? easeOutCubic : easeInOutCubic);
} else {
self.__scheduledLeft = self.__scrollLeft = left;
self.__scheduledTop = self.__scrollTop = top;
self.__scheduledZoom = self.__zoomLevel = zoom;
// Push values out
if (self.__callback) {
self.__callback(left, top, zoom, wasResize);
}
// Fix max scroll ranges
if (self.options.zooming) {
self.__computeScrollMax();
}
}
},
/**
* Recomputes scroll minimum values based on client dimensions and content dimensions.
*/
__computeScrollMax: function(zoomLevel) {
var self = this;
if (zoomLevel == null) {
zoomLevel = self.__zoomLevel;
}
self.__maxScrollLeft = Math.max((self.__contentWidth * zoomLevel) - self.__clientWidth, 0);
self.__maxScrollTop = Math.max((self.__contentHeight * zoomLevel) - self.__clientHeight, 0);
if (!self.__didWaitForSize && !self.__maxScrollLeft && !self.__maxScrollTop) {
self.__didWaitForSize = true;
self.__waitForSize();
}
},
/**
* If the scroll view isn't sized correctly on start, wait until we have at least some size
*/
__waitForSize: function() {
var self = this;
clearTimeout(self.__sizerTimeout);
var sizer = function() {
self.resize(true);
};
sizer();
self.__sizerTimeout = setTimeout(sizer, 500);
},
/*
---------------------------------------------------------------------------
ANIMATION (DECELERATION) SUPPORT
---------------------------------------------------------------------------
*/
/**
* Called when a touch sequence end and the speed of the finger was high enough
* to switch into deceleration mode.
*/
__startDeceleration: function() {
var self = this;
if (self.options.paging) {
var scrollLeft = Math.max(Math.min(self.__scrollLeft, self.__maxScrollLeft), 0);
var scrollTop = Math.max(Math.min(self.__scrollTop, self.__maxScrollTop), 0);
var clientWidth = self.__clientWidth;
var clientHeight = self.__clientHeight;
// We limit deceleration not to the min/max values of the allowed range, but to the size of the visible client area.
// Each page should have exactly the size of the client area.
self.__minDecelerationScrollLeft = Math.floor(scrollLeft / clientWidth) * clientWidth;
self.__minDecelerationScrollTop = Math.floor(scrollTop / clientHeight) * clientHeight;
self.__maxDecelerationScrollLeft = Math.ceil(scrollLeft / clientWidth) * clientWidth;
self.__maxDecelerationScrollTop = Math.ceil(scrollTop / clientHeight) * clientHeight;
} else {
self.__minDecelerationScrollLeft = 0;
self.__minDecelerationScrollTop = 0;
self.__maxDecelerationScrollLeft = self.__maxScrollLeft;
self.__maxDecelerationScrollTop = self.__maxScrollTop;
if (self.__refreshActive) self.__minDecelerationScrollTop = self.__refreshHeight * -1;
}
// Wrap class method
var step = function(percent, now, render) {
self.__stepThroughDeceleration(render);
};
// How much velocity is required to keep the deceleration running
self.__minVelocityToKeepDecelerating = self.options.snapping ? 4 : 0.1;
// Detect whether it's still worth to continue animating steps
// If we are already slow enough to not being user perceivable anymore, we stop the whole process here.
var verify = function() {
var shouldContinue = Math.abs(self.__decelerationVelocityX) >= self.__minVelocityToKeepDecelerating ||
Math.abs(self.__decelerationVelocityY) >= self.__minVelocityToKeepDecelerating;
if (!shouldContinue) {
self.__didDecelerationComplete = true;
//Make sure the scroll values are within the boundaries after a bounce,
//not below 0 or above maximum
if (self.options.bouncing && !self.__refreshActive) {
self.scrollTo(
Math.min( Math.max(self.__scrollLeft, 0), self.__maxScrollLeft ),
Math.min( Math.max(self.__scrollTop, 0), self.__maxScrollTop ),
self.__refreshActive
);
}
}
return shouldContinue;
};
var completed = function() {
self.__isDecelerating = false;
if (self.__didDecelerationComplete) {
self.__scrollingComplete();
}
// Animate to grid when snapping is active, otherwise just fix out-of-boundary positions
if (self.options.paging) {
self.scrollTo(self.__scrollLeft, self.__scrollTop, self.options.snapping);
}
};
// Start animation and switch on flag
self.__isDecelerating = zyngaCore.effect.Animate.start(step, verify, completed);
},
/**
* Called on every step of the animation
*
* @param inMemory {Boolean} Whether to not render the current step, but keep it in memory only. Used internally only!
*/
__stepThroughDeceleration: function(render) {
var self = this;
//
// COMPUTE NEXT SCROLL POSITION
//
// Add deceleration to scroll position
var scrollLeft = self.__scrollLeft + self.__decelerationVelocityX;// * self.options.deceleration);
var scrollTop = self.__scrollTop + self.__decelerationVelocityY;// * self.options.deceleration);
//
// HARD LIMIT SCROLL POSITION FOR NON BOUNCING MODE
//
if (!self.options.bouncing) {
var scrollLeftFixed = Math.max(Math.min(self.__maxDecelerationScrollLeft, scrollLeft), self.__minDecelerationScrollLeft);
if (scrollLeftFixed !== scrollLeft) {
scrollLeft = scrollLeftFixed;
self.__decelerationVelocityX = 0;
}
var scrollTopFixed = Math.max(Math.min(self.__maxDecelerationScrollTop, scrollTop), self.__minDecelerationScrollTop);
if (scrollTopFixed !== scrollTop) {
scrollTop = scrollTopFixed;
self.__decelerationVelocityY = 0;
}
}
//
// UPDATE SCROLL POSITION
//
if (render) {
self.__publish(scrollLeft, scrollTop, self.__zoomLevel);
} else {
self.__scrollLeft = scrollLeft;
self.__scrollTop = scrollTop;
}
//
// SLOW DOWN
//
// Slow down velocity on every iteration
if (!self.options.paging) {
// This is the factor applied to every iteration of the animation
// to slow down the process. This should emulate natural behavior where
// objects slow down when the initiator of the movement is removed
var frictionFactor = self.options.deceleration;
self.__decelerationVelocityX *= frictionFactor;
self.__decelerationVelocityY *= frictionFactor;
}
//
// BOUNCING SUPPORT
//
if (self.options.bouncing) {
var scrollOutsideX = 0;
var scrollOutsideY = 0;
// This configures the amount of change applied to deceleration/acceleration when reaching boundaries
var penetrationDeceleration = self.options.penetrationDeceleration;
var penetrationAcceleration = self.options.penetrationAcceleration;
// Check limits
if (scrollLeft < self.__minDecelerationScrollLeft) {
scrollOutsideX = self.__minDecelerationScrollLeft - scrollLeft;
} else if (scrollLeft > self.__maxDecelerationScrollLeft) {
scrollOutsideX = self.__maxDecelerationScrollLeft - scrollLeft;
}
if (scrollTop < self.__minDecelerationScrollTop) {
scrollOutsideY = self.__minDecelerationScrollTop - scrollTop;
} else if (scrollTop > self.__maxDecelerationScrollTop) {
scrollOutsideY = self.__maxDecelerationScrollTop - scrollTop;
}
// Slow down until slow enough, then flip back to snap position
if (scrollOutsideX !== 0) {
var isHeadingOutwardsX = scrollOutsideX * self.__decelerationVelocityX <= self.__minDecelerationScrollLeft;
if (isHeadingOutwardsX) {
self.__decelerationVelocityX += scrollOutsideX * penetrationDeceleration;
}
var isStoppedX = Math.abs(self.__decelerationVelocityX) <= self.__minVelocityToKeepDecelerating;
//If we're not heading outwards, or if the above statement got us below minDeceleration, go back towards bounds
if (!isHeadingOutwardsX || isStoppedX) {
self.__decelerationVelocityX = scrollOutsideX * penetrationAcceleration;
}
}
if (scrollOutsideY !== 0) {
var isHeadingOutwardsY = scrollOutsideY * self.__decelerationVelocityY <= self.__minDecelerationScrollTop;
if (isHeadingOutwardsY) {
self.__decelerationVelocityY += scrollOutsideY * penetrationDeceleration;
}
var isStoppedY = Math.abs(self.__decelerationVelocityY) <= self.__minVelocityToKeepDecelerating;
//If we're not heading outwards, or if the above statement got us below minDeceleration, go back towards bounds
if (!isHeadingOutwardsY || isStoppedY) {
self.__decelerationVelocityY = scrollOutsideY * penetrationAcceleration;
}
}
}
},
/**
* calculate the distance between two touches
* @param {Touch} touch1
* @param {Touch} touch2
* @returns {Number} distance
*/
__getDistance: function getDistance(touch1, touch2) {
var x = touch2.pageX - touch1.pageX,
y = touch2.pageY - touch1.pageY;
return Math.sqrt((x * x) + (y * y));
},
/**
* calculate the scale factor between two touchLists (fingers)
* no scale is 1, and goes down to 0 when pinched together, and bigger when pinched out
* @param {Array} start
* @param {Array} end
* @returns {Number} scale
*/
__getScale: function getScale(start, end) {
// need two fingers...
if (start.length >= 2 && end.length >= 2) {
return this.__getDistance(end[0], end[1]) /
this.__getDistance(start[0], start[1]);
}
return 1;
}
});
ionic.scroll = {
isScrolling: false,
lastTop: 0
};
})(ionic);
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