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###
ownCloud - News
@author Bernhard Posselt
@copyright 2012 Bernhard Posselt nukeawhale@gmail.com
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU AFFERO GENERAL PUBLIC LICENSE
License as published by the Free Software Foundation; either
version 3 of the License, or any later version.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU AFFERO GENERAL PUBLIC LICENSE for more details.
You should have received a copy of the GNU Affero General Public
License along with this library. If not, see <http://www.gnu.org/licenses/>.
###
angular.module('News').directive 'itemShortcuts', ['$window', ($window) ->
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
$($window.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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