mirror of
https://github.com/Poniverse/Pony.fm.git
synced 2024-11-23 21:47:59 +01:00
28 lines
840 B
CoffeeScript
28 lines
840 B
CoffeeScript
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angular.module('ponyfm').directive 'pfmScrollRecorder', () ->
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(scope, element, attrs) ->
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timeout = null
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onScroll = null
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lastInView = null
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element.scroll (e) ->
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(window.clearTimeout timeout) if timeout
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timeout = window.setTimeout (-> onScroll e), 500
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onScroll = (e) -> scope.safeApply ->
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items = element.find 'li:not(.empty)'
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itemHeight = (items.eq 0).height()
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itemsArray = items.get()
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elementViewTop = element.offset().top
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elementViewBottom = elementViewTop + element.height()
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for i in [itemsArray.length - 1..0]
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listItem = $ itemsArray[i]
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listItemTop = listItem.offset().top + itemHeight
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isInView = listItemTop > elementViewTop && listItemTop < elementViewBottom
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if isInView
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lastInView = listItem
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break
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scope.$emit 'element-in-view', angular.element(lastInView).scope()
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