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###
# ownCloud news app
#
# @author Alessandro Cosentino
# @author Bernhard Posselt
# Copyright (c) 2012 - Alessandro Cosentino <cosenal@gmail.com>
# Copyright (c) 2012 - Bernhard Posselt <nukeawhale@gmail.com>
#
# This file is licensed under the Affero General Public License version 3 or
# later.
#
# See the COPYING-README file
#
###
angular.module('News').directive 'feedNavigation', ->
return (scope, elm, attr) ->
jumpTo = ($scrollArea, $item) ->
position = $item.offset().top - $scrollArea.offset().top + $scrollArea.scrollTop()
$scrollArea.scrollTop(position)
jumpToPreviousItem = (scrollArea) ->
$scrollArea = $(scrollArea)
$items = $scrollArea.find('.feed_item')
notJumped = true
for item in $items
$item = $(item)
if $item.position().top >= 0
$previous = $item.prev()
# if there are no items before the current one
if $previous.length > 0
jumpTo($scrollArea, $previous)
notJumped = false
break
# in case we didnt jump
if $items.length > 0 and notJumped
jumpTo($scrollArea, $items.last())
jumpToNextItem = (scrollArea) ->
$scrollArea = $(scrollArea)
$items = $scrollArea.find('.feed_item')
for item in $items
$item = $(item)
if $item.position().top > 1
jumpTo($scrollArea, $item)
break
$(document).keydown (e) ->
# only activate if no input elements is focused
focused = $(':focus')
if not (focused.is('input') or focused.is('select') or
focused.is('textarea') or focused.is('checkbox') or focused.is('button'))
scrollArea = elm
# j or right
if e.keyCode == 74 or e.keyCode == 39
jumpToNextItem(scrollArea)
# k or left
else if e.keyCode == 75 or e.keyCode == 37
jumpToPreviousItem(scrollArea)
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