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jquery.immybox.coffee
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jquery.immybox.coffee
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(($, window, document) ->
pluginName = "immybox"
defaults =
choices: []
maxResults: 50
showArrow: true
openOnClick: true
defaultSelectedValue: undefined
filterFn: (query) ->
# default filter function does case insensitive "contains" matching
(choice) -> choice.text.toLowerCase().indexOf(query.toLowerCase()) >= 0
formatChoice: (query) ->
# default choice formatter function wraps all instances of query in a
# span.highlight
if query? and query isnt ''
reg = new RegExp(query.replace(/[#-.]|[[-^]|[?|{}]/g, '\\$&'), 'gi')
return (choice) ->
choice.text.replace(reg, '<span class="highlight">$&</span>')
else
return (choice) -> choice.text
objects = [] # keep references to all plugin instances
# addCommas = (nStr) ->
# nStr += '';
# x = nStr.split '.'
# x1 = x[0]
# x2 = if x.length > 1 then '.' + x[1] else ''
# rgx = /(\d+)(\d{3})/
# while (rgx.test(x1))
# x1 = x1.replace rgx, '$1' + ',' + '$2'
# return x1 + x2
class ImmyBox
constructor: (element, options) ->
self = @
@element = $ element
@element.addClass pluginName
@element.attr 'autocomplete', 'off'
@_defaults = defaults
@_name = pluginName
@_element = element
@options = $.extend {}, defaults, options
@choices = @options.choices
@selectedChoice = null
@defaultSelectedChoice =
if @options.defaultSelectedValue?
@choices.filter((c) -> c.value is self.options.defaultSelectedValue)[0] or null
else
# return null / undefined
@options.defaultSelectedValue
if @options.showArrow
@element.addClass "#{pluginName}_witharrow"
if @options.openOnClick
@element.on 'click', @openResults
# init with the value that's in the text box
@selectChoiceByValue @element.val()
@queryResultArea = $ "<div class='#{pluginName}_results'></div>"
@queryResultArea.scrollLock?()
@queryResultAreaVisible = false
@_val = @element.val() # to keep track of what WAS in the text box
@oldQuery = @_val
@queryResultArea.on 'click', "li.#{pluginName}_choice", ->
value = $(@).data 'value'
self.selectChoiceByValue value
self.hideResults()
self._val = self.element.val()
self.element.focus()
return
@queryResultArea.on 'mouseenter', "li.#{pluginName}_choice", ->
self.queryResultArea.find("li.#{pluginName}_choice.active").removeClass 'active'
$(@).addClass 'active'
return
@element.on 'keyup change search', @doQuery
@element.on 'keydown', @doSelection
###################
# event listeners #
###################
# @element.on 'keyup change search'
# perform a query on the choices
doQuery: =>
query = @element.val()
if @_val isnt query # user has changed input value, do a search and display the search results
@_val = query
@oldQuery = query
if query is ''
@hideResults()
# If user has backspaced everything in the field, we can safely clear
# clear the currently-selected value (since clicking out of the field
# this point would call @revert() anyway)
@selectChoiceByValue(null)
else
@insertFilteredChoiceElements query
return
# @element.on 'keydown'
# select the highlighted choice
doSelection: (e) =>
if e.which is 27 # escape
@display()
@hideResults()
if @queryResultAreaVisible
switch e.which
when 9 # tab
@selectHighlightedChoice()
when 13 # enter
e.preventDefault() # prevent form from submitting (i think; test this!)
@selectHighlightedChoice()
when 38 # up
e.preventDefault() # prevent cursor from moving
@highlightPreviousChoice()
@scroll()
when 40 # down
e.preventDefault() # prevent cursor from moving
@highlightNextChoice()
@scroll()
else
switch e.which
when 40 # down
e.preventDefault() # prevent cursor from moving
if @selectedChoice?
@insertFilteredChoiceElements @oldQuery
else
@insertFilteredChoiceElements ''
when 9 # tab
@revert()
return
# @element.on 'click'
# show the results box on click
openResults: (e) =>
e.stopPropagation() # stop the event from bubbling up and the body click event catching it
@revertOtherInstances() # because the event isn't bubbling, other instances won't revert
if @selectedChoice?
@insertFilteredChoiceElements @oldQuery
else
@insertFilteredChoiceElements ''
return
###################
# private methods #
###################
# revert or set to null after losing focus
revert: =>
if @queryResultAreaVisible
# revert to last set value
@display()
@hideResults()
else if @element.val() is ''
# set to null
@selectChoiceByValue null
return
# if visible, re-position the results area on window resize
reposition: =>
if @queryResultAreaVisible
@positionResultsArea()
return
insertFilteredChoiceElements: (query) ->
if query is ''
filteredChoices = @choices
else
filteredChoices = (@choices.filter @options.filterFn @oldQuery)
truncatedChoices = filteredChoices[[email protected]]
if defaultChoice = @defaultSelectedChoice
if defaultChoice in filteredChoices
if defaultChoice not in truncatedChoices
# add defaultChoice to the beginning of the truncatedChoices so the user sees it first
truncatedChoices.unshift(defaultChoice)
truncatedChoices.pop()
else
unless truncatedChoices[0] is defaultChoice
# move defaultChoice from where it is in the array to the first value
truncatedChoices = truncatedChoices.filter((c) -> c.value isnt defaultChoice.value)
truncatedChoices.unshift(defaultChoice)
# difference = filteredChoices.length - truncatedChoices.length
format = @options.formatChoice
# for backwards-compatibility, only assume formatChoice returns a function
# if it only takes in one param
if format.length is 1
format = format(query)
selectedOne = false
results = truncatedChoices.map (choice) =>
li = $ "<li class='#{pluginName}_choice'></li>"
li.attr 'data-value', choice.value
li.html format choice, query
if choice is @selectedChoice
selectedOne = true
li.addClass 'active'
return li
if results.length is 0
info = $ "<p class='#{pluginName}_noresults'>no matches</p>"
@queryResultArea
.empty()
.append(info)
else
if not selectedOne
unless defaultChoice is null
results[0].addClass 'active'
list = $('<ul></ul>')
.append(results)
@queryResultArea
.empty()
.append(list)
@showResults()
return
scroll: ->
resultsHeight = @queryResultArea.height()
resultsTop = @queryResultArea.scrollTop()
resultsBottom = resultsTop + resultsHeight
highlightedChoice = @getHighlightedChoice()
return if not highlightedChoice?
highlightedChoiceHeight = highlightedChoice.outerHeight()
highlightedChoiceTop = highlightedChoice.position().top + resultsTop
highlightedChoiceBottom = highlightedChoiceTop + highlightedChoiceHeight
if highlightedChoiceTop < resultsTop
@queryResultArea.scrollTop highlightedChoiceTop
if highlightedChoiceBottom > resultsBottom
@queryResultArea.scrollTop highlightedChoiceBottom - resultsHeight
return
positionResultsArea: ->
# gather some info
inputOffset = @element.offset()
inputHeight = @element.outerHeight()
inputWidth = @element.outerWidth()
resultsHeight = @queryResultArea.outerHeight()
resultsBottom = inputOffset.top + inputHeight + resultsHeight
windowBottom = $(window).height() + $(window).scrollTop()
# set the dimmensions and position
@queryResultArea.outerWidth inputWidth
@queryResultArea.css left: inputOffset.left
if resultsBottom > windowBottom
@queryResultArea.css top: inputOffset.top - resultsHeight
else
@queryResultArea.css top: inputOffset.top + inputHeight
return
getHighlightedChoice: ->
choice = @queryResultArea.find("li.#{pluginName}_choice.active")
if choice.length is 1
return choice
else
return null
highlightNextChoice: ->
highlightedChoice = @getHighlightedChoice()
if highlightedChoice?
nextChoice = highlightedChoice.next("li.#{pluginName}_choice")
if nextChoice.length is 1
highlightedChoice.removeClass 'active'
nextChoice.addClass 'active'
else
choices = @queryResultArea.find("li.#{pluginName}_choice")
if choices.length
$(choices[0]).addClass('active')
return
highlightPreviousChoice: ->
highlightedChoice = @getHighlightedChoice()
if highlightedChoice?
previousChoice = highlightedChoice.prev("li.#{pluginName}_choice")
if previousChoice.length is 1
highlightedChoice.removeClass 'active'
previousChoice.addClass 'active'
else
choices = @queryResultArea.find("li.#{pluginName}_choice")
if choices.length
$(choices[choices.length - 1]).addClass('active')
return
selectHighlightedChoice: ->
highlightedChoice = @getHighlightedChoice()
if highlightedChoice?
value = highlightedChoice.data 'value'
@selectChoiceByValue value
@_val = @element.val()
@hideResults()
else
@revert()
return
# display the selected choice in the input box
display: ->
if @selectedChoice?
@selectedChoice.text
@element.val @selectedChoice.text
else
@element.val ''
if typeof Event isnt 'undefined'
@_element.dispatchEvent new Event('input')
@_val = @element.val()
return
# select the first choice with matching value
# Note: values should be unique
selectChoiceByValue: (value_to_select) ->
old_value = @getValue()
if value_to_select? and value_to_select isnt ''
matches = @choices.filter (choice) -> return `choice.value == value_to_select` # use type coersive equals
if matches[0]?
@selectedChoice = matches[0]
else
@selectedChoice = null
else
@selectedChoice = null
value = @getValue()
if value isnt old_value
@element.trigger 'update', [value]
# @_element.dispatchEvent new CustomEvent('update', {
# detail: value
# })
@display()
return
revertOtherInstances: ->
o.revert() for o in objects when o isnt @
return
####################
# "public" methods #
####################
publicMethods: ['showResults', 'hideResults', 'getChoices', 'setChoices', 'getValue', 'setValue', 'destroy']
# show the results area
showResults: ->
$('body').append @queryResultArea
@queryResultAreaVisible = true
@scroll()
@positionResultsArea()
return
# hide the results area
hideResults: ->
@queryResultArea.detach()
@queryResultAreaVisible = false
return
# return array of choices
getChoices: ->
return @choices
# update the array of choices
setChoices: (newChoices) ->
@choices = newChoices
if @selectedChoice?
@selectChoiceByValue @selectedChoice.value
@oldQuery = ''
return newChoices
# get the value of the currently selected choice
getValue: ->
if @selectedChoice?
return @selectedChoice.value
else
return null
# set the value
setValue: (newValue) ->
currentValue = @getValue()
if currentValue isnt newValue
@selectChoiceByValue newValue
@oldQuery = ''
return @getValue()
else
return currentValue
# destroy this instance of the plugin
destroy: ->
#remove event listeners
@element.off 'keyup change search', @doQuery
@element.off 'keydown', @doSelection
if @options.openOnClick
@element.off 'click', @openResults
@element.removeClass pluginName
@queryResultArea.remove() # removes query result area and all related event listeners
$.removeData @element[0], "plugin_#{pluginName}" # remove reference to plugin instance
objects = objects.filter (o) => return o isnt @ # remove reference from objects array
return
# use one global click event listener to close/revert ones that are open
$('html').on 'click', ->
o.revert() for o in objects
return
# use one global scoll/resize listener to reposition any result areas that are open
$(window).on 'resize scroll', ->
o.reposition() for o in objects when o.queryResultAreaVisible
return
$.fn[pluginName] = (options) ->
args = Array.prototype.slice.call(arguments, 1)
outputs = []
@each ->
if $.data(@, "plugin_" + pluginName)
if options? and typeof options is 'string'
plugin = $.data(@, "plugin_" + pluginName)
method = options
if method in plugin.publicMethods
outputs.push plugin[method].apply plugin, args
else
throw new Error "#{pluginName} has no method '#{method}'"
else
newObject = new ImmyBox @, options
objects.push newObject
outputs.push $.data @, "plugin_" + pluginName, newObject
return
return outputs
return
) jQuery, window, document