bigbluebutton-Github/labs/meteor-client/app/client/views/whiteboard/slide.coffee

Template.slide.rendered = ->
  currentSlide = getCurrentSlideDoc()
  if currentSlide?.slide?.png_uri?
    createWhiteboardPaper (wpm) ->
      displaySlide wpm

@createWhiteboardPaper = (callback) =>
  @whiteboardPaperModel = new Meteor.WhiteboardPaperModel('whiteboard-paper')
  callback(@whiteboardPaperModel)

@displaySlide = (wpm) ->
  currentSlide = getCurrentSlideDoc()
  wpm.create()
  pic = new Image()
  pic.onload = ->
    adjustedDimensions = scaleSlide(this.width, this.height)
    wpm._displayPage(currentSlide?.slide?.png_uri, this.width, this.height)
    manuallyDisplayShapes()
    wpm.scale(adjustedDimensions.width, adjustedDimensions.height)

  pic.src = currentSlide?.slide?.png_uri

@manuallyDisplayShapes = ->
  currentSlide = getCurrentSlideDoc()
  wpm = @whiteboardPaperModel
  shapes = Meteor.Shapes.find({whiteboardId: currentSlide?.slide?.id}).fetch()
  for s in shapes
    shapeInfo = s.shape?.shape or s?.shape
    shapeType = shapeInfo?.type

    if shapeType isnt "text"
      len = shapeInfo.points.length
      for num in [0..len] # the coordinates must be in the range 0 to 1
        shapeInfo?.points[num] = shapeInfo?.points[num] / 100
    wpm?.makeShape(shapeType, shapeInfo)
    wpm?.updateShape(shapeType, shapeInfo)

@scaleSlide = (originalWidth, originalHeight) ->
  boardWidth = $("#whiteboard").width()

  whiteboardBottom = $("#whiteboard").offset().top + $("#whiteboard").height()
  footerTop = $(".myFooter").offset().top
  if footerTop < whiteboardBottom
    boardHeight = footerTop - $("#whiteboard").offset().top - $("#whiteboard-navbar").height() - 10
  else
    boardHeight = $("#whiteboard").height() - $("#whiteboard-navbar").height() - 10

  if originalWidth <= originalHeight
    adjustedWidth = boardHeight * originalWidth / originalHeight
    $('#whiteboard-paper').width(adjustedWidth)
    if boardWidth < adjustedWidth
      adjustedHeight = boardHeight * boardWidth / adjustedWidth
      adjustedWidth = boardWidth
    else
      adjustedHeight = boardHeight
    $("#whiteboard-paper").height(adjustedHeight)
  else
    adjustedHeight = boardWidth * originalHeight / originalWidth
    $('#whiteboard-paper').height(adjustedHeight)
    if boardHeight < adjustedHeight
      adjustedWidth = boardWidth * boardHeight / adjustedHeight
      adjustedHeight = boardHeight
    else
      adjustedWidth = boardWidth
    $("#whiteboard-paper").width(adjustedWidth)

  { width: adjustedWidth, height: adjustedHeight }

Template.slide.helpers
  updatePointerLocation: (pointer) ->
    if whiteboardPaperModel?
      wpm = whiteboardPaperModel
      wpm?.moveCursor(pointer.x, pointer.y)

#### SHAPE ####
Template.shape.rendered = ->
  # @data is the shape object coming from the {{#each}} in the html file
  shapeInfo = @data.shape?.shape or @data.shape
  shapeType = shapeInfo?.type

  if shapeType isnt "text"
    len = shapeInfo.points.length
    for num in [0..len] # the coordinates must be in the range 0 to 1
      shapeInfo.points[num] = shapeInfo.points[num] / 100

  if whiteboardPaperModel?
    wpm = whiteboardPaperModel
    wpm?.makeShape(shapeType, shapeInfo)
    wpm?.updateShape(shapeType, shapeInfo)

Template.shape.destroyed = ->
  if whiteboardPaperModel?
    wpm = whiteboardPaperModel
    wpm.clearShapes()
    manuallyDisplayShapes()