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200 lines
3.7 KiB
CoffeeScript
200 lines
3.7 KiB
CoffeeScript
class AsciiIo.Movie
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MIN_DELAY: 0.01
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constructor: (@options) ->
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_.extend(this, Backbone.Events)
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@reset()
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@startTimeReporter()
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reset: ->
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@frameNo = 0
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@completedFramesTime = 0
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@playing = false
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@lastFrameAt = undefined
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@clearPauseState()
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call: (method, args...) ->
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@[method].apply this, args
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now: ->
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(new Date()).getTime()
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stdout_frames: ->
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@options.stdout_frames
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play: ->
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return if @isPlaying()
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if @isFinished()
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@restart()
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else if @isPaused()
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@resume()
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else
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@start()
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start: ->
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@playing = true
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@trigger 'started'
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@lastFrameAt = @now()
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@nextFrame()
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stop: ->
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@playing = false
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@cancelNextFrameProcessing()
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now = @now()
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@adjustFrameWaitTime(now)
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@pausedAt = now
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cancelNextFrameProcessing: ->
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clearInterval @nextFrameTimeoutId
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adjustFrameWaitTime: (now) ->
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resumedAt = @resumedAt or @lastFrameAt
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currentWaitTime = now - resumedAt
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@totalFrameWaitTime += currentWaitTime
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restart: ->
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@reset()
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@start()
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pause: ->
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return if @isPaused()
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@stop()
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@trigger 'paused'
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resume: ->
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return if @isPlaying()
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@playing = true
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@resumedAt = @now()
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[delay, changes] = @stdout_frames()[@frameNo]
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delayMs = delay * 1000
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delayLeft = delayMs - @totalFrameWaitTime
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@processFrameWithDelay(delayLeft)
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@trigger 'resumed'
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togglePlay: ->
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if @isPlaying() then @pause() else @play()
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isPlaying: ->
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@playing
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isPaused: ->
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!@isPlaying() and !@isFinished() and @frameNo > 0
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isFinished: ->
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!@isPlaying() and @frameNo >= @stdout_frames().length
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seek: (percent) ->
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@stop()
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@rewindTo(percent)
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@resume()
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rewindTo: (percent) ->
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duration = @options.duration
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requestedTime = duration * percent / 100
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frameNo = 0
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time = 0
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totalCount = 0
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delay = data = undefined
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while time < requestedTime
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[delay, changes] = @stdout_frames()[frameNo]
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if time + delay >= requestedTime
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break
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@trigger 'render', changes
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time += delay
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frameNo += 1
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@frameNo = frameNo
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@completedFramesTime = time * 1000
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@lastFrameAt = @now()
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wait = requestedTime - time
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@totalFrameWaitTime = wait * 1000
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startTimeReporter: ->
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@timeReportId = setInterval(
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=> @trigger('time', @currentTime())
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500
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)
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stopTimeReporter: ->
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clearInterval @timeReportId
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currentTime: ->
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@completedFramesTime + @currentFrameTime()
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currentFrameTime: ->
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if @isPlaying()
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@playingFrameTime()
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else if @isPaused()
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@pausedFrameTime()
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else
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0
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playingFrameTime: ->
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if @frameWasPaused()
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@currentFrameWithPauseTime()
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else
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@currentFrameWithNoPauseTime()
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frameWasPaused: ->
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!!@pausedAt
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currentFrameWithPauseTime: ->
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@totalFrameWaitTime + @sinceResumeTime()
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currentFrameWithNoPauseTime: ->
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@now() - @lastFrameAt
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sinceResumeTime: ->
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@now() - @resumedAt
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pausedFrameTime: ->
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@totalFrameWaitTime
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clearPauseState: ->
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@pausedAt = undefined
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@resumedAt = undefined
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@totalFrameWaitTime = 0
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nextFrame: ->
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frame = @stdout_frames()[@frameNo]
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if not frame or frame.length is 0
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@playing = false
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@trigger 'finished'
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return false
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[delay, changes] = frame
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realDelay = delay * 1000 * (1.0 / @options.speed)
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@processFrameWithDelay(realDelay)
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true
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processFrameWithDelay: (delay) ->
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@nextFrameTimeoutId = setTimeout(
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=>
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@trigger 'wakeup'
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@processFrame()
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delay
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)
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processFrame: ->
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[delay, changes] = @stdout_frames()[@frameNo]
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@trigger 'render', changes
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@frameNo += 1
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@completedFramesTime += delay * 1000
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@lastFrameAt = @now()
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@clearPauseState()
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@nextFrame()
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