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/*global define:false require:false */
(function (name, context, definition) {
if (typeof module != 'undefined' && module.exports) module.exports = definition();
else if (typeof define == 'function' && define.amd) define(definition);
else context[name] = definition();
})('jquery-scrollto', this, function(){
// Prepare
var jQuery, $, ScrollTo;
jQuery = $ = window.jQuery || require('jquery');
// Fix scrolling animations on html/body on safari
$.propHooks.scrollTop = $.propHooks.scrollLeft = {
get: function(elem,prop) {
var result = null;
if ( elem.tagName === 'HTML' || elem.tagName === 'BODY' ) {
if ( prop === 'scrollLeft' ) {
result = window.scrollX;
} else if ( prop === 'scrollTop' ) {
result = window.scrollY;
}
}
if ( result == null ) {
result = elem[prop];
}
return result;
}
};
$.Tween.propHooks.scrollTop = $.Tween.propHooks.scrollLeft = {
get: function(tween) {
return $.propHooks.scrollTop.get(tween.elem, tween.prop);
},
set: function(tween) {
// Our safari fix
if ( tween.elem.tagName === 'HTML' || tween.elem.tagName === 'BODY' ) {
// Defaults
tween.options.bodyScrollLeft = (tween.options.bodyScrollLeft || window.scrollX);
tween.options.bodyScrollTop = (tween.options.bodyScrollTop || window.scrollY);
// Apply
if ( tween.prop === 'scrollLeft' ) {
tween.options.bodyScrollLeft = Math.round(tween.now);
}
else if ( tween.prop === 'scrollTop' ) {
tween.options.bodyScrollTop = Math.round(tween.now);
}
// Apply
window.scrollTo(tween.options.bodyScrollLeft, tween.options.bodyScrollTop);
}
// jQuery's IE8 Fix
else if ( tween.elem.nodeType && tween.elem.parentNode ) {
tween.elem[ tween.prop ] = tween.now;
}
}
};
// jQuery ScrollTo
ScrollTo = {
// Configuration
config: {
duration: 400,
easing: 'swing',
callback: undefined,
durationMode: 'each',
offsetTop: 0,
offsetLeft: 0
},
// Set Configuration
configure: function(options){
// Apply Options to Config
$.extend(ScrollTo.config, options||{});
// Chain
return this;
},
// Perform the Scroll Animation for the Collections
// We use $inline here, so we can determine the actual offset start for each overflow:scroll item
// Each collection is for each overflow:scroll item
scroll: function(collections, config){
// Prepare
var collection, $container, container, $target, $inline, position, containerTagName,
containerScrollTop, containerScrollLeft,
containerScrollTopEnd, containerScrollLeftEnd,
startOffsetTop, targetOffsetTop, targetOffsetTopAdjusted,
startOffsetLeft, targetOffsetLeft, targetOffsetLeftAdjusted,
scrollOptions,
callback;
// Determine the Scroll
collection = collections.pop();
$container = collection.$container;
$target = collection.$target;
containerTagName = $container.prop('tagName');
// Prepare the Inline Element of the Container
$inline = $('<span/>').css({
'position': 'absolute',
'top': '0px',
'left': '0px'
});
position = $container.css('position');
// Insert the Inline Element of the Container
$container.css({position:'relative'});
$inline.appendTo($container);
// Determine the top offset
startOffsetTop = $inline.offset().top;
targetOffsetTop = $target.offset().top;
targetOffsetTopAdjusted = targetOffsetTop - startOffsetTop - parseInt(config.offsetTop,10);
// Determine the left offset
startOffsetLeft = $inline.offset().left;
targetOffsetLeft = $target.offset().left;
targetOffsetLeftAdjusted = targetOffsetLeft - startOffsetLeft - parseInt(config.offsetLeft,10);
// Determine current scroll positions
containerScrollTop = $container.prop('scrollTop');
containerScrollLeft = $container.prop('scrollLeft');
// Reset the Inline Element of the Container
$inline.remove();
$container.css({position:position});
// Prepare the scroll options
scrollOptions = {};
// Prepare the callback
callback = function(event){
// Check
if ( collections.length === 0 ) {
// Callback
if ( typeof config.callback === 'function' ) {
config.callback();
}
}
else {
// Recurse
ScrollTo.scroll(collections,config);
}
// Return true
return true;
};
// Handle if we only want to scroll if we are outside the viewport
if ( config.onlyIfOutside ) {
// Determine current scroll positions
containerScrollTopEnd = containerScrollTop + $container.height();
containerScrollLeftEnd = containerScrollLeft + $container.width();
// Check if we are in the range of the visible area of the container
if ( containerScrollTop < targetOffsetTopAdjusted && targetOffsetTopAdjusted < containerScrollTopEnd ) {
targetOffsetTopAdjusted = containerScrollTop;
}
if ( containerScrollLeft < targetOffsetLeftAdjusted && targetOffsetLeftAdjusted < containerScrollLeftEnd ) {
targetOffsetLeftAdjusted = containerScrollLeft;
}
}
// Determine the scroll options
if ( targetOffsetTopAdjusted !== containerScrollTop ) {
scrollOptions.scrollTop = targetOffsetTopAdjusted;
}
if ( targetOffsetLeftAdjusted !== containerScrollLeft ) {
scrollOptions.scrollLeft = targetOffsetLeftAdjusted;
}
// Check to see if the scroll is necessary
if ( $container.prop('scrollHeight') === $container.width() ) {
delete scrollOptions.scrollTop;
}
if ( $container.prop('scrollWidth') === $container.width() ) {
delete scrollOptions.scrollLeft;
}
// Perform the scroll
if ( scrollOptions.scrollTop != null || scrollOptions.scrollLeft != null ) {
$container.animate(scrollOptions, {
duration: config.duration,
easing: config.easing,
complete: callback
});
}
else {
callback();
}
// Return true
return true;
},
// ScrollTo the Element using the Options
fn: function(options){
// Prepare
var collections, config, $container, container;
collections = [];
// Prepare
var $target = $(this);
if ( $target.length === 0 ) {
// Chain
return this;
}
// Handle Options
config = $.extend({},ScrollTo.config,options);
// Fetch
$container = $target.parent();
container = $container.get(0);
// Cycle through the containers
while ( ($container.length === 1) && (container !== document.body) && (container !== document) ) {
// Check Container for scroll differences
var containerScrollTop, containerScrollLeft;
containerScrollTop = $container.css('overflow-y') !== 'visible' && container.scrollHeight !== container.clientHeight;
containerScrollLeft = $container.css('overflow-x') !== 'visible' && container.scrollWidth !== container.clientWidth;
if ( containerScrollTop || containerScrollLeft ) {
// Push the Collection
collections.push({
'$container': $container,
'$target': $target
});
// Update the Target
$target = $container;
}
// Update the Container
$container = $container.parent();
container = $container.get(0);
}
// Add the final collection
collections.push({
'$container': $('html'),
// document.body doesn't work in firefox, html works for all
// internet explorer starts at the beggining
'$target': $target
});
// Adjust the Config
if ( config.durationMode === 'all' ) {
config.duration /= collections.length;
}
// Handle
ScrollTo.scroll(collections,config);
// Chain
return this;
}
};
// Apply our extensions to jQuery
$.ScrollTo = $.ScrollTo || ScrollTo;
$.fn.ScrollTo = $.fn.ScrollTo || ScrollTo.fn;
// Export
return ScrollTo;
});