Sha256: 037e0d6bd94530c22af0afb30456575ba396ff93fd7cff78805603f7d03ef907
Contents?: true
Size: 1.71 KB
Versions: 24
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Stored size: 1.71 KB
Contents
u = up.util
class up.FieldObserver
# Although (depending on the browser) we only need/receive either input or change,
# we always bind to both events in case another script manually triggers it.
CHANGE_EVENTS = 'input change'
constructor: (@$field, options) ->
@delay = options.delay
@callback = options.callback
start: =>
# Don't use undefined since an unchecked checkbox actually has an undefined value
@scheduledValue = null
@processedValue = @readFieldValue()
@currentTimer = undefined
@currentCallback = undefined
@$field.on(CHANGE_EVENTS, @check)
stop: =>
@$field.off(CHANGE_EVENTS, @check)
@cancelTimer()
cancelTimer: =>
clearTimeout(@currentTimer)
@currentTimer = undefined
scheduleTimer: =>
@currentTimer = u.setTimer @delay, =>
@currentTimer = undefined
@requestCallback()
isNewValue: (value) =>
value != @processedValue && (@scheduledValue == null || @scheduledValue != value)
requestCallback: =>
if @scheduledValue != null && !@currentTimer && !@currentCallback
@processedValue = @scheduledValue
@scheduledValue = null
@currentCallback = => @callback.call(@$field.get(0), @processedValue, @$field)
# If the callback returns a promise x, Promise.resolve(x) will wait for it
callbackDone = Promise.resolve(@currentCallback())
u.always callbackDone, =>
# Don't use undefined since an unchecked checkbox actually has an undefined value
@currentCallback = undefined
@requestCallback()
readFieldValue: =>
u.submittedValue(@$field)
check: =>
value = @readFieldValue()
if @isNewValue(value)
@scheduledValue = value
@cancelTimer()
@scheduleTimer()
Version data entries
24 entries across 24 versions & 1 rubygems