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field.rb
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field.rb
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require "cgi"
require "webrat/core_extensions/blank"
require "webrat/core_extensions/nil_to_param"
require "webrat/core/elements/element"
module Webrat
# Raised when Webrat is asked to manipulate a disabled form field
class DisabledFieldError < WebratError
end
class Field < Element #:nodoc:
attr_reader :value
def self.xpath_search
[".//button", ".//input", ".//textarea", ".//select"]
end
def self.field_classes
@field_classes || []
end
def self.inherited(klass)
@field_classes ||= []
@field_classes << klass
# raise args.inspect
end
def self.load(session, element)
return nil if element.nil?
session.elements[Webrat::XML.xpath_to(element)] ||= field_class(element).new(session, element)
end
def self.field_class(element)
case element.name
when "button" then ButtonField
when "select" then SelectField
when "textarea" then TextareaField
else
case Webrat::XML.attribute(element, "type")
when "checkbox" then CheckboxField
when "hidden" then HiddenField
when "radio" then RadioField
when "password" then PasswordField
when "file" then FileField
when "reset" then ResetField
when "submit" then ButtonField
when "button" then ButtonField
when "image" then ButtonField
else TextField
end
end
end
def initialize(*args)
super
@value = default_value
end
def label_text
return nil if labels.empty?
labels.first.text
end
def id
Webrat::XML.attribute(@element, "id")
end
def disabled?
@element.attributes.has_key?("disabled") && Webrat::XML.attribute(@element, "disabled") != 'false'
end
def raise_error_if_disabled
return unless disabled?
raise DisabledFieldError.new("Cannot interact with disabled form element (#{self})")
end
def to_param
return nil if disabled?
case Webrat.configuration.mode
when :rails
parse_rails_request_params("#{name}=#{escaped_value}")
when :merb
::Merb::Parse.query("#{name}=#{escaped_value}")
else
{ name => escaped_value }
end
end
def set(value)
@value = value
end
def unset
@value = default_value
end
protected
def parse_rails_request_params(params)
if defined?(ActionController::AbstractRequest)
ActionController::AbstractRequest.parse_query_parameters(params)
elsif defined?(ActionController::UrlEncodedPairParser)
# For Rails > 2.2
ActionController::UrlEncodedPairParser.parse_query_parameters(params)
else
# For Rails > 2.3
Rack::Utils.parse_nested_query(params)
end
end
def form
Form.load(@session, form_element)
end
def form_element
parent = @element.parent
while parent.respond_to?(:parent)
return parent if parent.name == 'form'
parent = parent.parent
end
end
def name
Webrat::XML.attribute(@element, "name")
end
def escaped_value
CGI.escape(@value.to_s)
end
def labels
@labels ||= label_elements.map do |element|
Label.load(@session, element)
end
end
def label_elements
return @label_elements unless @label_elements.nil?
@label_elements = []
parent = @element.parent
while parent.respond_to?(:parent)
if parent.name == 'label'
@label_elements.push parent
break
end
parent = parent.parent
end
unless id.blank?
@label_elements += Webrat::XML.xpath_search(form.element, ".//label[@for = '#{id}']")
end
@label_elements
end
def default_value
Webrat::XML.attribute(@element, "value")
end
def replace_param_value(params, oval, nval)
output = Hash.new
params.each do |key, value|
case value
when Hash
value = replace_param_value(value, oval, nval)
when Array
value = value.map { |o| o == oval ? nval : oval }
when oval
value = nval
end
output[key] = value
end
output
end
end
class ButtonField < Field #:nodoc:
def self.xpath_search
[".//button", ".//input[@type = 'submit']", ".//input[@type = 'button']", ".//input[@type = 'image']"]
end
def to_param
return nil if @value.nil?
super
end
def default_value
nil
end
def click
raise_error_if_disabled
set(Webrat::XML.attribute(@element, "value")) unless Webrat::XML.attribute(@element, "name").blank?
form.submit
end
end
class HiddenField < Field #:nodoc:
def self.xpath_search
".//input[@type = 'hidden']"
end
def to_param
if collection_name?
super
else
checkbox_with_same_name = form.field_named(name, CheckboxField)
if checkbox_with_same_name.to_param.blank?
super
else
nil
end
end
end
protected
def collection_name?
name =~ /\[\]/
end
end
class CheckboxField < Field #:nodoc:
def self.xpath_search
".//input[@type = 'checkbox']"
end
def to_param
return nil if @value.nil?
super
end
def check
raise_error_if_disabled
set(Webrat::XML.attribute(@element, "value") || "on")
end
def checked?
Webrat::XML.attribute(@element, "checked") == "checked"
end
def uncheck
raise_error_if_disabled
set(nil)
end
protected
def default_value
if Webrat::XML.attribute(@element, "checked") == "checked"
Webrat::XML.attribute(@element, "value") || "on"
else
nil
end
end
end
class PasswordField < Field #:nodoc:
def self.xpath_search
".//input[@type = 'password']"
end
end
class RadioField < Field #:nodoc:
def self.xpath_search
".//input[@type = 'radio']"
end
def to_param
return nil if @value.nil?
super
end
def choose
raise_error_if_disabled
other_options.each do |option|
option.set(nil)
end
set(Webrat::XML.attribute(@element, "value") || "on")
end
def checked?
Webrat::XML.attribute(@element, "checked") == "checked"
end
protected
def other_options
form.fields.select { |f| f.name == name }
end
def default_value
if Webrat::XML.attribute(@element, "checked") == "checked"
Webrat::XML.attribute(@element, "value") || "on"
else
nil
end
end
end
class TextareaField < Field #:nodoc:
def self.xpath_search
".//textarea"
end
protected
def default_value
Webrat::XML.inner_html(@element)
end
end
class FileField < Field #:nodoc:
def self.xpath_search
".//input[@type = 'file']"
end
attr_accessor :content_type
def set(value, content_type = nil)
super(value)
@content_type = content_type
end
def to_param
if @value.nil?
super
else
replace_param_value(super, @value, test_uploaded_file)
end
end
protected
def test_uploaded_file
if content_type
ActionController::TestUploadedFile.new(@value, content_type)
else
ActionController::TestUploadedFile.new(@value)
end
end
end
class TextField < Field #:nodoc:
def self.xpath_search
[".//input[@type = 'text']", ".//input[not(@type)]"]
end
end
class ResetField < Field #:nodoc:
def self.xpath_search
".//input[@type = 'reset']"
end
end
class SelectField < Field #:nodoc:
def self.xpath_search
".//select"
end
def options
@options ||= SelectOption.load_all(@session, @element)
end
protected
def default_value
selected_options = Webrat::XML.xpath_search(@element, ".//option[@selected = 'selected']")
selected_options = Webrat::XML.xpath_search(@element, ".//option[position() = 1]") if selected_options.empty?
selected_options.map do |option|
return "" if option.nil?
Webrat::XML.attribute(option, "value") || Webrat::XML.inner_html(option)
end
end
end
end