Created
August 12, 2015 03:06
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"use strict" | |
topOfElement = (element) -> | |
if element then element.offsetTop + topOfElement(element.offsetParent) else 0 | |
ScrollList = React.createClass | |
getDefaultProps: -> | |
cssclass: '' | |
limit: 10 | |
offset: 150 | |
getInitialState: -> | |
data: @props.data | |
loading: false | |
initialized: false | |
componentWillUnmount: -> | |
@detachScrollListener() | |
componentDidMount: -> | |
@attachScrollListener() | |
scrollListener: -> | |
el = @getDOMNode() | |
if window.pageYOffset | |
scrollTop = window.pageYOffset | |
else | |
bd = document.documentElement || document.body.parentNode || document.body | |
scrollTop = bd.scrollTop | |
to_btm = topOfElement(el) + el.offsetHeight - scrollTop - window.innerHeight | |
if to_btm < @props.offset | |
@detachScrollListener() | |
unless @state.data is null || @state.data.length < this.props.limit | |
@setState( | |
loading: true | |
) | |
@fetchNext() | |
attachScrollListener: -> | |
window.addEventListener 'scroll', @scrollListener | |
window.addEventListener 'resize', @scrollListener | |
@scrollListener() | |
detachScrollListener: -> | |
window.removeEventListener 'scroll', @scrollListener | |
window.removeEventListener 'resize', @scrollListener | |
fetchNext: -> | |
@setState | |
loading: true | |
glue = if @props.url.indexOf('?') > -1 then '&' else '?' | |
params = "limit=#{@props.limit}&offset=#{@state.data.length}" | |
$.ajax | |
url: "#{@props.url}?#{params}" | |
dataType: 'json' | |
success: (response) => | |
if response.length > 0 | |
# FIXME fires render twice when updating | |
@setState( | |
data: @state.data.concat(response) | |
loading: false | |
) | |
if response.length < @props.limit | |
@forceUpdate() | |
if response.length == @props.limit | |
@attachScrollListener() | |
else | |
@setState | |
loading: false | |
error: (xhr, status, err) -> | |
console.error @url, status, err.toString() | |
render: -> | |
if @state.loading is true | |
loading = React.createElement(Loading, { text: @props.text.loading }) | |
if @state.data && @state.data.length is 0 | |
empty = React.createElement('div', { | |
className: 'columns large-12' | |
}, | |
React.createElement('p', { | |
className: 'sub' | |
}, @props.text.empty | |
) | |
) | |
if @state.data && @state.data.length > 0 | |
if @props.component == 'postlist' | |
list = React.createElement(PostList, | |
cssclass: @props.cssclass | |
empty: @props.text.empty | |
data: @state.data | |
) | |
else | |
list = React.createElement(UserList, | |
button: @props.button | |
cssclass: @props.cssclass | |
empty: @props.text.empty | |
users: @state.data | |
) | |
React.createElement('div', null, | |
empty, | |
list, | |
loading | |
) | |
window.ScrollList = ScrollList |
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