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#= require_tree ../utils
{ matches, getData, setData, stopEverything, formElements } = Rails
Rails.handleDisabledElement = (e) ->
element = this
stopEverything(e) if element.disabled
# Unified function to enable an element (link, button and form)
Rails.enableElement = (e) ->
element = if e instanceof Event then e.target else e
if matches(element, Rails.linkDisableSelector)
enableLinkElement(element)
else if matches(element, Rails.buttonDisableSelector) or matches(element, Rails.formEnableSelector)
enableFormElement(element)
else if matches(element, Rails.formSubmitSelector)
enableFormElements(element)
# Unified function to disable an element (link, button and form)
Rails.disableElement = (e) ->
element = if e instanceof Event then e.target else e
if matches(element, Rails.linkDisableSelector)
disableLinkElement(element)
else if matches(element, Rails.buttonDisableSelector) or matches(element, Rails.formDisableSelector)
disableFormElement(element)
else if matches(element, Rails.formSubmitSelector)
disableFormElements(element)
# Replace element's html with the 'data-disable-with' after storing original html
# and prevent clicking on it
disableLinkElement = (element) ->
replacement = element.getAttribute('data-disable-with')
if replacement?
setData(element, 'ujs:enable-with', element.innerHTML) # store enabled state
element.innerHTML = replacement
element.addEventListener('click', stopEverything) # prevent further clicking
setData(element, 'ujs:disabled', true)
# Restore element to its original state which was disabled by 'disableLinkElement' above
enableLinkElement = (element) ->
originalText = getData(element, 'ujs:enable-with')
if originalText?
element.innerHTML = originalText # set to old enabled state
setData(element, 'ujs:enable-with', null) # clean up cache
element.removeEventListener('click', stopEverything) # enable element
setData(element, 'ujs:disabled', null)
# Disables form elements:
# - Caches element value in 'ujs:enable-with' data store
# - Replaces element text with value of 'data-disable-with' attribute
# - Sets disabled property to true
disableFormElements = (form) ->
formElements(form, Rails.formDisableSelector).forEach(disableFormElement)
disableFormElement = (element) ->
replacement = element.getAttribute('data-disable-with')
if replacement?
if matches(element, 'button')
setData(element, 'ujs:enable-with', element.innerHTML)
element.innerHTML = replacement
else
setData(element, 'ujs:enable-with', element.value)
element.value = replacement
element.disabled = true
setData(element, 'ujs:disabled', true)
# Re-enables disabled form elements:
# - Replaces element text with cached value from 'ujs:enable-with' data store (created in `disableFormElements`)
# - Sets disabled property to false
enableFormElements = (form) ->
formElements(form, Rails.formEnableSelector).forEach(enableFormElement)
enableFormElement = (element) ->
originalText = getData(element, 'ujs:enable-with')
if originalText?
if matches(element, 'button')
element.innerHTML = originalText
else
element.value = originalText
setData(element, 'ujs:enable-with', null) # clean up cache
element.disabled = false
setData(element, 'ujs:disabled', null)
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