66 lines
1.8 KiB
CoffeeScript
66 lines
1.8 KiB
CoffeeScript
Metadata =
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init: ->
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return unless Conf['WEBM Metadata'] and g.VIEW in ['index', 'thread']
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Callbacks.Post.push
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name: 'WEBM Metadata'
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cb: @node
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node: ->
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for file, i in @files when /webm$/i.test file.url
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if @isClone
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el = $ '.webm-title', file.text
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else
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el = $.el 'span',
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className: 'webm-title'
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el.dataset.index = i
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$.extend el,
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<%= html('<a href="javascript:;"></a>') %>
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$.add file.text, [$.tn(' '), el]
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$.one el.lastElementChild, 'mouseover focus', Metadata.load if el.children.length is 1
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return
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load: ->
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$.rmClass @parentNode, 'error'
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$.addClass @parentNode, 'loading'
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{index} = @parentNode.dataset
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CrossOrigin.binary Get.postFromNode(@).files[index].url, (data) =>
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$.rmClass @parentNode, 'loading'
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if data?
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title = Metadata.parse data
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output = $.el 'span',
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textContent: title or ''
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$.addClass @parentNode, 'not-found' unless title?
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$.before @, output
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@parentNode.tabIndex = 0
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@parentNode.focus() if d.activeElement is @
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@tabIndex = -1
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else
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$.addClass @parentNode, 'error'
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$.one @, 'click', Metadata.load
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,
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Range: 'bytes=0-9999'
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parse: (data) ->
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readInt = ->
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n = data[i++]
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len = 0
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len++ while n < (0x80 >> len)
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n ^= (0x80 >> len)
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while len-- and i < data.length
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n = (n << 8) ^ data[i++]
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n
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i = 0
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while i < data.length
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element = readInt()
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size = readInt()
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if element is 0x3BA9 # Title
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title = ''
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while size-- and i < data.length
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title += String.fromCharCode data[i++]
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return decodeURIComponent escape title # UTF-8 decoding
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else unless element in [0x8538067, 0x549A966] # Segment, Info
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i += size
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null
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