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/*!
* jQuery Mobile Events
* by Ben Major (www.ben-major.co.uk)
*
* Copyright 2011, Ben Major
* Licensed under the MIT License:
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*
*/
(function ($) {
$.attrFn = $.attrFn || {};
// navigator.userAgent.toLowerCase() isn't reliable for Chrome installs
// on mobile devices. As such, we will create a boolean isChromeDesktop
// The reason that we need to do this is because Chrome annoyingly
// purports support for touch events even if the underlying hardware
// does not!
var agent = navigator.userAgent.toLowerCase(),
isChromeDesktop = (agent.indexOf('chrome') > -1 && ((agent.indexOf('windows') > -1) || (agent.indexOf('macintosh') > -1) || (agent.indexOf('linux') > -1)) && agent.indexOf('mobile') < 0 && agent.indexOf('nexus') < 0),
settings = {
tap_pixel_range: 5,
swipe_h_threshold: 50,
swipe_v_threshold: 50,
taphold_threshold: 750,
doubletap_int: 500,
touch_capable: ('ontouchstart' in document.documentElement && !isChromeDesktop),
orientation_support: ('orientation' in window && 'onorientationchange' in window),
startevent: ('ontouchstart' in document.documentElement && !isChromeDesktop) ? 'touchstart' : 'mousedown',
endevent: ('ontouchstart' in document.documentElement && !isChromeDesktop) ? 'touchend' : 'mouseup',
moveevent: ('ontouchstart' in document.documentElement && !isChromeDesktop) ? 'touchmove' : 'mousemove',
tapevent: ('ontouchstart' in document.documentElement && !isChromeDesktop) ? 'tap' : 'click',
scrollevent: ('ontouchstart' in document.documentElement && !isChromeDesktop) ? 'touchmove' : 'scroll',
hold_timer: null,
tap_timer: null
};
// Convenience functions:
$.isTouchCapable = function() { return settings.touch_capable; };
$.getStartEvent = function() { return settings.startevent; };
$.getEndEvent = function() { return settings.endevent; };
$.getMoveEvent = function() { return settings.moveevent; };
$.getTapEvent = function() { return settings.tapevent; };
$.getScrollEvent = function() { return settings.scrollevent; };
// Add Event shortcuts:
$.each(['tapstart', 'tapend', 'tap', 'tap2', 'tap3', 'tap4', 'singletap', 'doubletap', 'taphold', 'swipe', 'swipeup', 'swiperight', 'swipedown', 'swipeleft', 'swipeend', 'scrollstart', 'scrollend', 'orientationchange'], function (i, name) {
$.fn[name] = function (fn) {
return fn ? this.on(name, fn) : this.trigger(name);
};
$.attrFn[name] = true;
});
// tapstart Event:
$.event.special.tapstart = {
setup: function () {
var thisObject = this,
$this = $(thisObject);
$this.on(settings.startevent, function (e) {
$this.data('callee', arguments.callee);
if (e.which && e.which !== 1) {
return false;
}
var origEvent = e.originalEvent,
touchData = {
'position': {
'x': ((settings.touch_capable) ? origEvent.touches[0].screenX : e.screenX),
'y': (settings.touch_capable) ? origEvent.touches[0].screenY : e.screenY,
},
'offset': {
'x': (settings.touch_capable) ? origEvent.touches[0].pageX - origEvent.touches[0].target.offsetLeft : e.offsetX,
'y': (settings.touch_capable) ? origEvent.touches[0].pageY - origEvent.touches[0].target.offsetTop : e.offsetY,
},
'time': new Date().getTime(),
'target': e.target
};
triggerCustomEvent(thisObject, 'tapstart', e, touchData);
return true;
});
},
remove: function () {
$(this).off(settings.startevent, $(this).data.callee);
}
};
// tapmove Event:
$.event.special.tapmove = {
setup: function() {
var thisObject = this,
$this = $(thisObject);
$this.on(settings.moveevent, function(e) {
$this.data('callee', arguments.callee);
var origEvent = e.originalEvent,
touchData = {
'position': {
'x': ((settings.touch_capable) ? origEvent.touches[0].screenX : e.screenX),
'y': (settings.touch_capable) ? origEvent.touches[0].screenY : e.screenY,
},
'offset': {
'x': (settings.touch_capable) ? origEvent.touches[0].pageX - origEvent.touches[0].target.offsetLeft : e.offsetX,
'y': (settings.touch_capable) ? origEvent.touches[0].pageY - origEvent.touches[0].target.offsetTop : e.offsetY,
},
'time': new Date().getTime(),
'target': e.target
};
triggerCustomEvent(thisObject, 'tapmove', e, touchData);
return true;
});
},
remove: function() {
$(this).off(settings.moveevent, $(this).data.callee);
}
}
// tapend Event:
$.event.special.tapend = {
setup: function () {
var thisObject = this,
$this = $(thisObject);
$this.on(settings.endevent, function (e) {
// Touch event data:
$this.data('callee', arguments.callee);
var origEvent = e.originalEvent;
var touchData = {
'position': {
'x': (settings.touch_capable) ? origEvent.changedTouches[0].screenX : e.screenX,
'y': (settings.touch_capable) ? origEvent.changedTouches[0].screenY : e.screenY
},
'offset': {
'x': (settings.touch_capable) ? origEvent.changedTouches[0].pageX - origEvent.changedTouches[0].target.offsetLeft : e.offsetX,
'y': (settings.touch_capable) ? origEvent.changedTouches[0].pageY - origEvent.changedTouches[0].target.offsetTop : e.offsetY
},
'time': new Date().getTime(),
'target': e.target
};
triggerCustomEvent(thisObject, 'tapend', e, touchData);
return true;
});
},
remove: function () {
$(this).off(settings.endevent, $(this).data.callee);
}
};
// taphold Event:
$.event.special.taphold = {
setup: function () {
var thisObject = this,
$this = $(thisObject),
origTarget,
timer,
start_pos = {
x: 0,
y: 0
};
$this.on(settings.startevent, function (e) {
if (e.which && e.which !== 1) {
return false;
} else {
$this.data('tapheld', false);
origTarget = e.target;
var origEvent = e.originalEvent;
var start_time = new Date().getTime(),
startPosition = {
'x': (settings.touch_capable) ? origEvent.touches[0].screenX : e.screenX,
'y': (settings.touch_capable) ? origEvent.touches[0].screenY : e.screenY
},
startOffset = {
'x': (settings.touch_capable) ? origEvent.touches[0].pageX - origEvent.touches[0].target.offsetLeft : e.offsetX,
'y': (settings.touch_capable) ? origEvent.touches[0].pageY - origEvent.touches[0].target.offsetTop : e.offsetY
};
start_pos.x = (e.originalEvent.targetTouches) ? e.originalEvent.targetTouches[0].pageX : e.pageX;
start_pos.y = (e.originalEvent.targetTouches) ? e.originalEvent.targetTouches[0].pageY : e.pageY;
settings.hold_timer = window.setTimeout(function () {
var end_x = (e.originalEvent.targetTouches) ? e.originalEvent.targetTouches[0].pageX : e.pageX,
end_y = (e.originalEvent.targetTouches) ? e.originalEvent.targetTouches[0].pageY : e.pageY;
if (e.target == origTarget && (start_pos.x == end_x && start_pos.y == end_y)) {
$this.data('tapheld', true);
var end_time = new Date().getTime(),
endPosition = {
'x': (settings.touch_capable) ? origEvent.touches[0].screenX : e.screenX,
'y': (settings.touch_capable) ? origEvent.touches[0].screenY : e.screenY
},
endOffset = {
'x': (settings.touch_capable) ? origEvent.touches[0].pageX - origEvent.touches[0].target.offsetLeft : e.offsetX,
'y': (settings.touch_capable) ? origEvent.touches[0].pageY - origEvent.touches[0].target.offsetTop : e.offsetY
};
duration = end_time - start_time;
// Build the touch data:
var touchData = {
'startTime': start_time,
'endTime': end_time,
'startPosition': startPosition,
'startOffset': startOffset,
'endPosition': endPosition,
'endOffset': endOffset,
'duration': duration,
'target': e.target
}
$this.data('callee1', arguments.callee);
triggerCustomEvent(thisObject, 'taphold', e, touchData);
}
}, settings.taphold_threshold);
return true;
}
}).on(settings.endevent, function () {
$this.data('callee2', arguments.callee);
$this.data('tapheld', false);
window.clearTimeout(settings.hold_timer);
});
},
remove: function () {
$(this).off(settings.startevent, $(this).data.callee1).off(settings.endevent, $(this).data.callee2);
}
};
// doubletap Event:
$.event.special.doubletap = {
setup: function () {
var thisObject = this,
$this = $(thisObject),
origTarget,
action,
firstTap,
origEvent,
cooloff,
cooling = false;
$this.on(settings.startevent, function (e) {
if (e.which && e.which !== 1) {
return false;
}
$this.data('doubletapped', false);
origTarget = e.target;
$this.data('callee1', arguments.callee);
origEvent = e.originalEvent;
firstTap = {
'position': {
'x': (settings.touch_capable) ? origEvent.touches[0].screenX : e.screenX,
'y': (settings.touch_capable) ? origEvent.touches[0].screenY : e.screenY
},
'offset': {
'x': (settings.touch_capable) ? origEvent.touches[0].pageX - origEvent.touches[0].target.offsetLeft : e.offsetX,
'y': (settings.touch_capable) ? origEvent.touches[0].pageY - origEvent.touches[0].target.offsetTop : e.offsetY
},
'time': new Date().getTime(),
'target': e.target
};
return true;
}).on(settings.endevent, function (e) {
var now = new Date().getTime();
var lastTouch = $this.data('lastTouch') || now + 1;
var delta = now - lastTouch;
window.clearTimeout(action);
$this.data('callee2', arguments.callee);
if (delta < settings.doubletap_int && (e.target == origTarget) && delta > 100) {
$this.data('doubletapped', true);
window.clearTimeout(settings.tap_timer);
// Now get the current event:
var lastTap = {
'position': {
'x': (settings.touch_capable) ? e.originalEvent.changedTouches[0].screenX : e.screenX,
'y': (settings.touch_capable) ? e.originalEvent.changedTouches[0].screenY : e.screenY
},
'offset': {
'x': (settings.touch_capable) ? e.originalEvent.changedTouches[0].pageX - e.originalEvent.changedTouches[0].target.offsetLeft : e.offsetX,
'y': (settings.touch_capable) ? e.originalEvent.changedTouches[0].pageY - e.originalEvent.changedTouches[0].target.offsetTop : e.offsetY
},
'time': new Date().getTime(),
'target': e.target
}
var touchData = {
'firstTap': firstTap,
'secondTap': lastTap,
'interval': lastTap.time - firstTap.time
};
if (!cooling) {
triggerCustomEvent(thisObject, 'doubletap', e, touchData);
}
cooling = true;
cooloff = window.setTimeout(function (e) {
cooling = false;
}, settings.doubletap_int);
} else {
$this.data('lastTouch', now);
action = window.setTimeout(function (e) {
window.clearTimeout(action);
}, settings.doubletap_int, [e]);
}
$this.data('lastTouch', now);
});
},
remove: function () {
$(this).off(settings.startevent, $(this).data.callee1).off(settings.endevent, $(this).data.callee2);
}
};
// singletap Event:
// This is used in conjuction with doubletap when both events are needed on the same element
$.event.special.singletap = {
setup: function () {
var thisObject = this,
$this = $(thisObject),
origTarget = null,
startTime = null,
start_pos = {
x: 0,
y: 0
};
$this.on(settings.startevent, function (e) {
if (e.which && e.which !== 1) {
return false;
} else {
startTime = new Date().getTime();
origTarget = e.target;
$this.data('callee1', arguments.callee);
// Get the start x and y position:
start_pos.x = (e.originalEvent.targetTouches) ? e.originalEvent.targetTouches[0].pageX : e.pageX;
start_pos.y = (e.originalEvent.targetTouches) ? e.originalEvent.targetTouches[0].pageY : e.pageY;
return true;
}
}).on(settings.endevent, function (e) {
$this.data('callee2', arguments.callee);
if (e.target == origTarget) {
// Get the end point:
end_pos_x = (e.originalEvent.changedTouches) ? e.originalEvent.changedTouches[0].pageX : e.pageX;
end_pos_y = (e.originalEvent.changedTouches) ? e.originalEvent.changedTouches[0].pageY : e.pageY;
// We need to check if it was a taphold:
settings.tap_timer = window.setTimeout(function () {
if (!$this.data('doubletapped') && !$this.data('tapheld') && (start_pos.x == end_pos_x) && (start_pos.y == end_pos_y)) {
var origEvent = e.originalEvent;
var touchData = {
'position': {
'x': (settings.touch_capable) ? origEvent.changedTouches[0].screenX : e.screenX,
'y': (settings.touch_capable) ? origEvent.changedTouches[0].screenY : e.screenY,
},
'offset': {
'x': (settings.touch_capable) ? origEvent.changedTouches[0].pageX - origEvent.changedTouches[0].target.offsetLeft : e.offsetX,
'y': (settings.touch_capable) ? origEvent.changedTouches[0].pageY - origEvent.changedTouches[0].target.offsetTop : e.offsetY,
},
'time': new Date().getTime(),
'target': e.target
};
// Was it a taphold?
if((touchData.time - startTime) < settings.taphold_threshold)
{
triggerCustomEvent(thisObject, 'singletap', e, touchData);
}
}
}, settings.doubletap_int);
}
});
},
remove: function () {
$(this).off(settings.startevent, $(this).data.callee1).off(settings.endevent, $(this).data.callee2);
}
};
// tap Event:
$.event.special.tap = {
setup: function () {
var thisObject = this,
$this = $(thisObject),
started = false,
origTarget = null,
start_time,
start_pos = {
x: 0,
y: 0
},
touches;
$this.on(settings.startevent, function (e) {
$this.data('callee1', arguments.callee);
if (e.which && e.which !== 1) {
return false;
} else {
started = true;
start_pos.x = (e.originalEvent.targetTouches) ? e.originalEvent.targetTouches[0].pageX : e.pageX;
start_pos.y = (e.originalEvent.targetTouches) ? e.originalEvent.targetTouches[0].pageY : e.pageY;
start_time = new Date().getTime();
origTarget = e.target;
touches = (e.originalEvent.targetTouches) ? e.originalEvent.targetTouches : [ e ];
return true;
}
}).on(settings.endevent, function (e) {
$this.data('callee2', arguments.callee);
// Only trigger if they've started, and the target matches:
var end_x = (e.originalEvent.targetTouches) ? e.originalEvent.changedTouches[0].pageX : e.pageX,
end_y = (e.originalEvent.targetTouches) ? e.originalEvent.changedTouches[0].pageY : e.pageY,
diff_x = (start_pos.x - end_x),
diff_y = (start_pos.y - end_y),
eventName;
if (origTarget == e.target && started && ((new Date().getTime() - start_time) < settings.taphold_threshold) && ((start_pos.x == end_x && start_pos.y == end_y) || (diff_x >= -(settings.tap_pixel_range) && diff_x <= settings.tap_pixel_range && diff_y >= -(settings.tap_pixel_range) && diff_y <= settings.tap_pixel_range))) {
var origEvent = e.originalEvent;
var touchData = [ ];
for( var i = 0; i < touches.length; i++)
{
var touch = {
'position': {
'x': (settings.touch_capable) ? origEvent.changedTouches[i].screenX : e.screenX,
'y': (settings.touch_capable) ? origEvent.changedTouches[i].screenY : e.screenY,
},
'offset': {
'x': (settings.touch_capable) ? origEvent.changedTouches[i].pageX - origEvent.changedTouches[i].target.offsetLeft : e.offsetX,
'y': (settings.touch_capable) ? origEvent.changedTouches[i].pageY - origEvent.changedTouches[i].target.offsetTop : e.offsetY,
},
'time': new Date().getTime(),
'target': e.target
};
touchData.push( touch );
}
console.log(touches);
switch( touches.length )
{
case 1:
eventName = 'tap';
break;
case 2:
eventName = 'tap2';
break;
case 3:
eventName = 'tap3';
break;
case 4:
eventName = 'tap4';
break;
}
triggerCustomEvent(thisObject, eventName, e, touchData);
}
});
},
remove: function () {
$(this).off(settings.startevent, $(this).data.callee1).off(settings.endevent, $(this).data.callee2);
}
};
// swipe Event (also handles swipeup, swiperight, swipedown and swipeleft):
$.event.special.swipe = {
setup: function () {
var thisObject = this,
$this = $(thisObject),
started = false,
hasSwiped = false,
originalCoord = {
x: 0,
y: 0
},
finalCoord = {
x: 0,
y: 0
},
startEvnt;
// Screen touched, store the original coordinate
function touchStart(e) {
$this = $(e.target);
$this.data('callee1', arguments.callee);
originalCoord.x = (e.originalEvent.targetTouches) ? e.originalEvent.targetTouches[0].pageX : e.pageX;
originalCoord.y = (e.originalEvent.targetTouches) ? e.originalEvent.targetTouches[0].pageY : e.pageY;
finalCoord.x = originalCoord.x;
finalCoord.y = originalCoord.y;
started = true;
var origEvent = e.originalEvent;
// Read event data into our startEvt:
startEvnt = {
'position': {
'x': (settings.touch_capable) ? origEvent.touches[0].screenX : e.screenX,
'y': (settings.touch_capable) ? origEvent.touches[0].screenY : e.screenY,
},
'offset': {
'x': (settings.touch_capable) ? origEvent.touches[0].pageX - origEvent.touches[0].target.offsetLeft : e.offsetX,
'y': (settings.touch_capable) ? origEvent.touches[0].pageY - origEvent.touches[0].target.offsetTop : e.offsetY,
},
'time': new Date().getTime(),
'target': e.target
};
// For some reason, we need to add a 100ms pause in order to trigger swiping
// on Playbooks:
var dt = new Date();
while ((new Date()) - dt < 100) {}
}
// Store coordinates as finger is swiping
function touchMove(e) {
$this = $(e.target);
$this.data('callee2', arguments.callee);
finalCoord.x = (e.originalEvent.targetTouches) ? e.originalEvent.targetTouches[0].pageX : e.pageX;
finalCoord.y = (e.originalEvent.targetTouches) ? e.originalEvent.targetTouches[0].pageY : e.pageY;
window.clearTimeout(settings.hold_timer);
var swipedir;
// We need to check if the element to which the event was bound contains a data-xthreshold | data-vthreshold:
var ele_x_threshold = $this.data('xthreshold'),
ele_y_threshold = $this.data('ythreshold'),
h_threshold = (typeof ele_x_threshold !== 'undefined' && ele_x_threshold !== false && parseInt(ele_x_threshold)) ? parseInt(ele_x_threshold) : settings.swipe_h_threshold,
v_threshold = (typeof ele_y_threshold !== 'undefined' && ele_y_threshold !== false && parseInt(ele_y_threshold)) ? parseInt(ele_y_threshold) : settings.swipe_v_threshold;
if (originalCoord.y > finalCoord.y && (originalCoord.y - finalCoord.y > v_threshold)) {
swipedir = 'swipeup';
}
if (originalCoord.x < finalCoord.x && (finalCoord.x - originalCoord.x > h_threshold)) {
swipedir = 'swiperight';
}
if (originalCoord.y < finalCoord.y && (finalCoord.y - originalCoord.y > v_threshold)) {
swipedir = 'swipedown';
}
if (originalCoord.x > finalCoord.x && (originalCoord.x - finalCoord.x > h_threshold)) {
swipedir = 'swipeleft';
}
if (swipedir != undefined && started) {
originalCoord.x = 0;
originalCoord.y = 0;
finalCoord.x = 0;
finalCoord.y = 0;
started = false;
// Read event data into our endEvnt:
var origEvent = e.originalEvent;
endEvnt = {
'position': {
'x': (settings.touch_capable) ? origEvent.touches[0].screenX : e.screenX,
'y': (settings.touch_capable) ? origEvent.touches[0].screenY : e.screenY,
},
'offset': {
'x': (settings.touch_capable) ? origEvent.touches[0].pageX - origEvent.touches[0].target.offsetLeft : e.offsetX,
'y': (settings.touch_capable) ? origEvent.touches[0].pageY - origEvent.touches[0].target.offsetTop : e.offsetY,
},
'time': new Date().getTime(),
'target': e.target
};
// Calculate the swipe amount (normalized):
var xAmount = Math.abs(startEvnt.position.x - endEvnt.position.x),
yAmount = Math.abs(startEvnt.position.y - endEvnt.position.y);
var touchData = {
'startEvnt': startEvnt,
'endEvnt': endEvnt,
'direction': swipedir.replace('swipe', ''),
'xAmount': xAmount,
'yAmount': yAmount,
'duration': endEvnt.time - startEvnt.time
}
hasSwiped = true;
$this.trigger('swipe', touchData).trigger(swipedir, touchData);
}
}
function touchEnd(e) {
$this = $(e.target);
var swipedir = "";
$this.data('callee3', arguments.callee);
if (hasSwiped) {
// We need to check if the element to which the event was bound contains a data-xthreshold | data-vthreshold:
var ele_x_threshold = $this.data('xthreshold'),
ele_y_threshold = $this.data('ythreshold'),
h_threshold = (typeof ele_x_threshold !== 'undefined' && ele_x_threshold !== false && parseInt(ele_x_threshold)) ? parseInt(ele_x_threshold) : settings.swipe_h_threshold,
v_threshold = (typeof ele_y_threshold !== 'undefined' && ele_y_threshold !== false && parseInt(ele_y_threshold)) ? parseInt(ele_y_threshold) : settings.swipe_v_threshold;
var origEvent = e.originalEvent;
endEvnt = {
'position': {
'x': (settings.touch_capable) ? origEvent.changedTouches[0].screenX : e.screenX,
'y': (settings.touch_capable) ? origEvent.changedTouches[0].screenY : e.screenY,
},
'offset': {
'x': (settings.touch_capable) ? origEvent.changedTouches[0].pageX - origEvent.changedTouches[0].target.offsetLeft : e.offsetX,
'y': (settings.touch_capable) ? origEvent.changedTouches[0].pageY - origEvent.changedTouches[0].target.offsetTop : e.offsetY,
},
'time': new Date().getTime(),
'target': e.target
};
// Read event data into our endEvnt:
if (startEvnt.position.y > endEvnt.position.y && (startEvnt.position.y - endEvnt.position.y > v_threshold)) {
swipedir = 'swipeup';
}
if (startEvnt.position.x < endEvnt.position.x && (endEvnt.position.x - startEvnt.position.x > h_threshold)) {
swipedir = 'swiperight';
}
if (startEvnt.position.y < endEvnt.position.y && (endEvnt.position.y - startEvnt.position.y > v_threshold)) {
swipedir = 'swipedown';
}
if (startEvnt.position.x > endEvnt.position.x && (startEvnt.position.x - endEvnt.position.x > h_threshold)) {
swipedir = 'swipeleft';
}
// Calculate the swipe amount (normalized):
var xAmount = Math.abs(startEvnt.position.x - endEvnt.position.x),
yAmount = Math.abs(startEvnt.position.y - endEvnt.position.y);
var touchData = {
'startEvnt': startEvnt,
'endEvnt': endEvnt,
'direction': swipedir.replace('swipe', ''),
'xAmount': xAmount,
'yAmount': yAmount,
'duration': endEvnt.time - startEvnt.time
}
$this.trigger('swipeend', touchData);
}
started = false;
hasSwiped = false;
}
$this.on(settings.startevent, touchStart);
$this.on(settings.moveevent, touchMove);
$this.on(settings.endevent, touchEnd);
},
remove: function () {
$(this).off(settings.startevent, $(this).data.callee1).off(settings.moveevent, $(this).data.callee2).off(settings.endevent, $(this).data.callee3);
}
};
// scrollstart Event (also handles scrollend):
$.event.special.scrollstart = {
setup: function () {
var thisObject = this,
$this = $(thisObject),
scrolling,
timer;
function trigger(event, state) {
scrolling = state;
triggerCustomEvent(thisObject, scrolling ? 'scrollstart' : 'scrollend', event);
}
// iPhone triggers scroll after a small delay; use touchmove instead
$this.on(settings.scrollevent, function (event) {
$this.data('callee', arguments.callee);
if (!scrolling) {
trigger(event, true);
}
clearTimeout(timer);
timer = setTimeout(function () {
trigger(event, false);
}, 50);
});
},
remove: function () {
$(this).off(settings.scrollevent, $(this).data.callee);
}
};
// This is the orientation change (largely borrowed from jQuery Mobile):
var win = $(window),
special_event,
get_orientation,
last_orientation,
initial_orientation_is_landscape,
initial_orientation_is_default,
portrait_map = {
'0': true,
'180': true
};
if (settings.orientation_support) {
var ww = window.innerWidth || $(window).width(),
wh = window.innerHeight || $(window).height(),
landscape_threshold = 50;
initial_orientation_is_landscape = ww > wh && (ww - wh) > landscape_threshold;
initial_orientation_is_default = portrait_map[window.orientation];
if ((initial_orientation_is_landscape && initial_orientation_is_default) || (!initial_orientation_is_landscape && !initial_orientation_is_default)) {
portrait_map = {
'-90': true,
'90': true
};
}
}
$.event.special.orientationchange = special_event = {
setup: function () {
// If the event is supported natively, return false so that jQuery
// will on to the event using DOM methods.
if (settings.orientation_support) {
return false;
}
// Get the current orientation to avoid initial double-triggering.
last_orientation = get_orientation();
win.on('throttledresize', handler);
return true;
},
teardown: function () {
if (settings.orientation_support) {
return false;
}
win.off('throttledresize', handler);
return true;
},
add: function (handleObj) {
// Save a reference to the bound event handler.
var old_handler = handleObj.handler;
handleObj.handler = function (event) {
event.orientation = get_orientation();
return old_handler.apply(this, arguments);
};
}
};
// If the event is not supported natively, this handler will be bound to
// the window resize event to simulate the orientationchange event.
function handler() {
// Get the current orientation.
var orientation = get_orientation();
if (orientation !== last_orientation) {
// The orientation has changed, so trigger the orientationchange event.
last_orientation = orientation;
win.trigger("orientationchange");
}
}
$.event.special.orientationchange.orientation = get_orientation = function () {
var isPortrait = true,
elem = document.documentElement;
if (settings.orientation_support) {
isPortrait = portrait_map[window.orientation];
} else {
isPortrait = elem && elem.clientWidth / elem.clientHeight < 1.1;
}
return isPortrait ? 'portrait' : 'landscape';
};
// throttle Handler:
$.event.special.throttledresize = {
setup: function () {
$(this).on('resize', throttle_handler);
},
teardown: function () {
$(this).off('resize', throttle_handler);
}
};
var throttle = 250,
throttle_handler = function () {
curr = (new Date()).getTime();
diff = curr - lastCall;
if (diff >= throttle) {
lastCall = curr;
$(this).trigger('throttledresize');
} else {
if (heldCall) {
window.clearTimeout(heldCall);
}
// Promise a held call will still execute
heldCall = window.setTimeout(handler, throttle - diff);
}
},
lastCall = 0,
heldCall,
curr,
diff;
// Trigger a custom event:
function triggerCustomEvent(obj, eventType, event, touchData) {
var originalType = event.type;
event.type = eventType;
$.event.dispatch.call(obj, event, touchData);
event.type = originalType;
}
// Correctly on anything we've overloaded:
$.each({
scrollend: 'scrollstart',
swipeup: 'swipe',
swiperight: 'swipe',
swipedown: 'swipe',
swipeleft: 'swipe',
swipeend: 'swipe',
tap2: 'tap'
}, function (e, srcE, touchData) {
$.event.special[e] = {
setup: function () {
$(this).on(srcE, $.noop);
}
};
});
})(jQuery);