mirror of
https://github.com/Poniverse/Pony.fm.git
synced 2024-11-27 07:17:59 +01:00
44 lines
1.7 KiB
CoffeeScript
44 lines
1.7 KiB
CoffeeScript
# Pony.fm - A community for pony fan music.
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# Copyright (C) 2015 Feld0
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#
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# This program is free software: you can redistribute it and/or modify
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# it under the terms of the GNU Affero General Public License as published by
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# the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU Affero General Public License for more details.
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#
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# You should have received a copy of the GNU Affero General Public License
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# along with this program. If not, see <http://www.gnu.org/licenses/>.
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module.exports = 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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