mirror of
https://github.com/codeninjasllc/codecombat.git
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59 lines
1.7 KiB
CoffeeScript
59 lines
1.7 KiB
CoffeeScript
module.exports = class DialogueAnimator
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jqueryElement: null
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childrenToAdd: null
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charsToAdd: null
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childAnimator: null
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constructor: (html, @jqueryElement) ->
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d = $('<div></div>').html(html)
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@childrenToAdd = _.map(d[0].childNodes, (e) -> return e)
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@t0 = new Date()
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@charsAdded = 0
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@charsPerSecond = 25
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tick: ->
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if not @charsToAdd and not @childAnimator
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@addNextElement()
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if @charsToAdd
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@addSingleChar()
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return
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if @childAnimator
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@childAnimator.tick()
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if @childAnimator.done()
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@childAnimator = null
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addNextElement: ->
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return unless @childrenToAdd.length
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nextElem = @childrenToAdd[0]
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@childrenToAdd = @childrenToAdd[1..]
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if nextElem.nodeName is '#text'
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@charsToAdd = nextElem.nodeValue
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else
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value = nextElem.innerHTML
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newElem = $(nextElem).html('')
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@jqueryElement.append(newElem)
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if value
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@charsAdded += @childAnimator.getCharsAdded() if @childAnimator
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@childAnimator = new DialogueAnimator(value, newElem)
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addSingleChar: ->
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elapsed = (new Date()) - @t0
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nAdded = @getCharsAdded()
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nToHaveBeenAdded = Math.round @charsPerSecond * elapsed / 1000
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nToAdd = Math.min nToHaveBeenAdded - nAdded, @charsToAdd.length
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@jqueryElement.html(@jqueryElement.html() + @charsToAdd.slice(0, nToAdd))
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@charsToAdd = @charsToAdd.slice(nToAdd)
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if @charsToAdd.length is 0
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@charsToAdd = null
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@charsAdded += nToAdd
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getCharsAdded: ->
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@charsAdded + (@childAnimator?.charsAdded ? 0)
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done: ->
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return false if @childrenToAdd.length > 0
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return false if @charsToAdd
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return false if @childAnimator
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return true
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