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chardinjs.coffee
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chardinjs.coffee
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do ($ = window.jQuery, window) ->
# Define the plugin class
class chardinJs
constructor: (el) ->
@$el = $(el)
$(window).resize => @.refresh()
start: ->
return false if @._overlay_visible()
@._add_overlay_layer()
@._show_element(el) for el in @$el.find('*[data-intro]')
@$el.trigger 'chardinJs:start'
toggle: () ->
if not @._overlay_visible()
@.start()
else
@.stop()
refresh: ()->
if @._overlay_visible()
@._position_helper_layer(el) for el in @$el.find('*[data-intro]')
else
return this
stop: () ->
@$el.find(".chardinjs-overlay").fadeOut -> $(this).remove()
@$el.find('.chardinjs-helper-layer').remove()
@$el.find('.chardinjs-show-element').removeClass('chardinjs-show-element')
@$el.find('.chardinjs-relative-position').removeClass('chardinjs-relative-position')
if window.removeEventListener
window.removeEventListener "keydown", @_onKeyDown, true
#IE
else document.detachEvent "onkeydown", @_onKeyDown if document.detachEvent
@$el.trigger 'chardinJs:stop'
_overlay_visible: ->
@$el.find('.chardinjs-overlay').length != 0
_add_overlay_layer: () ->
return false if @._overlay_visible()
overlay_layer = document.createElement("div")
styleText = ""
overlay_layer.className = "chardinjs-overlay"
#check if the target element is body, we should calculate the size of overlay layer in a better way
if @$el.prop('tagName') is "BODY"
styleText += "top: 0;bottom: 0; left: 0;right: 0;position: fixed;"
overlay_layer.setAttribute "style", styleText
else
element_position = @._get_offset(@$el.get()[0])
if element_position
styleText += "width: " + element_position.width + "px; height:" + element_position.height + "px; top:" + element_position.top + "px;left: " + element_position.left + "px;"
overlay_layer.setAttribute "style", styleText
@$el.get()[0].appendChild overlay_layer
overlay_layer.onclick = => @.stop()
setTimeout ->
styleText += "opacity: .8;opacity: .8;-ms-filter: 'progid:DXImageTransform.Microsoft.Alpha(Opacity=80)';filter: alpha(opacity=80);"
overlay_layer.setAttribute "style", styleText
, 10
_get_position: (element) -> element.getAttribute('data-position') or 'bottom'
_place_tooltip: (element) ->
tooltip_layer = $(element).data('tooltip_layer')
tooltip_layer_position = @._get_offset(tooltip_layer)
#reset the old style
tooltip_layer.style.top = null
tooltip_layer.style.right = null
tooltip_layer.style.bottom = null
tooltip_layer.style.left = null
switch @._get_position(element)
when "top", "bottom"
target_element_position = @._get_offset(element)
target_width = target_element_position.width
my_width = $(tooltip_layer).width()
tooltip_layer.style.left = "#{(target_width/2)-(tooltip_layer_position.width/2)}px"
when "left", "right"
target_element_position = @._get_offset(element)
target_height = target_element_position.height
my_height = $(tooltip_layer).height()
tooltip_layer.style.top = "#{(target_height/2)-(tooltip_layer_position.height/2)}px"
switch @._get_position(element)
when "left" then tooltip_layer.style.left = "-" + (tooltip_layer_position.width - 34) + "px"
when "right" then tooltip_layer.style.right = "-" + (tooltip_layer_position.width - 34) + "px"
when "bottom" then tooltip_layer.style.bottom = "-" + (tooltip_layer_position.height) + "px"
when "top" then tooltip_layer.style.top = "-" + (tooltip_layer_position.height) + "px"
_position_helper_layer: (element) ->
helper_layer = $(element).data('helper_layer')
element_position = @._get_offset(element)
helper_layer.setAttribute "style", "width: #{element_position.width}px; height:#{element_position.height}px; top:#{element_position.top}px; left: #{element_position.left}px;"
_show_element: (element) ->
element_position = @._get_offset(element)
helper_layer = document.createElement("div")
tooltip_layer = document.createElement("div")
$(element)
.data('helper_layer', helper_layer)
.data('tooltip_layer',tooltip_layer)
helper_layer.setAttribute "data-id", element.id if element.id
helper_layer.className = "chardinjs-helper-layer chardinjs-#{@._get_position(element)}"
@._position_helper_layer element
@$el.get()[0].appendChild helper_layer
tooltip_layer.className = "chardinjs-tooltip chardinjs-#{@._get_position(element)}"
tooltip_layer.innerHTML = "<div class='chardinjs-tooltiptext'>#{element.getAttribute('data-intro')}</div>"
helper_layer.appendChild tooltip_layer
@._place_tooltip element
element.className += " chardinjs-show-element"
current_element_position = ""
if element.currentStyle #IE
current_element_position = element.currentStyle["position"]
#Firefox
else current_element_position = document.defaultView.getComputedStyle(element, null).getPropertyValue("position") if document.defaultView and document.defaultView.getComputedStyle
current_element_position = current_element_position.toLowerCase()
element.className += " chardinjs-relative-position" if current_element_position isnt "absolute" and current_element_position isnt "relative"
_get_offset: (element) ->
element_position =
width: element.offsetWidth
height: element.offsetHeight
_x = 0
_y = 0
while element and not isNaN(element.offsetLeft) and not isNaN(element.offsetTop)
_x += element.offsetLeft
_y += element.offsetTop
element = element.offsetParent
element_position.top = _y
element_position.left = _x
element_position
$.fn.extend chardinJs: (option, args...) ->
$this = $(this[0])
data = $this.data('chardinJs')
if !data
$this.data 'chardinJs', (data = new chardinJs(this, option))
if typeof option == 'string'
data[option].apply(data, args)
data