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Contents
require 'volt/page/bindings/base_binding'
module Volt
# TODO: We need to figure out how we want to wrap JS events
class JSEvent
attr_reader :js_event
def initialize(js_event)
@js_event = js_event
end
def key_code
`this.js_event.keyCode`
end
def stop!
`this.js_event.stopPropagation();`
end
def prevent_default!
`this.js_event.preventDefault();`
end
def target
`this.js_event.toElement`
end
end
class EventBinding < BaseBinding
attr_accessor :context, :binding_name
def initialize(volt_app, target, context, binding_name, event_name, call_proc)
super(volt_app, target, context, binding_name)
@event_name = event_name
handler = proc do |js_event|
event = JSEvent.new(js_event)
event.prevent_default! if event_name == 'submit'
# Call the proc the user setup for the event in context,
# pass in the wrapper for the JS event
result = @context.instance_exec(event, &call_proc)
# The following doesn't work due to the promise already chained issue.
# # Ignore native objects.
# result = nil unless BasicObject === result
# # if the result is a promise, log an exception if it failed and wasn't
# # handled
# if result.is_a?(Promise) && !result.next
# result.fail do |err|
# Volt.logger.error("EventBinding Error: promise returned from event binding #{@event_name} was rejected")
# Volt.logger.error(err)
# end
# end
end
@listener = page.events.add(event_name, self, handler)
end
# Remove the event binding
def remove
page.events.remove(@event_name, self)
end
end
end
Version data entries
5 entries across 5 versions & 1 rubygems