Commit f064c840 authored by Robert Speicher's avatar Robert Speicher 🇲🇽

Add nav_link helper to TabHelper

parent aa0c4b77
module TabHelper
# Navigation link helper
#
# Returns an `li` element with an 'active' class if the supplied
# controller(s) and/or action(s) currently active. The contents of the
# element is the value passed to the block.
#
# options - The options hash used to determine if the element is "active" (default: {})
# :controller - One or more controller names to check (optional).
# :action - One or more action names to check (optional).
# :path - A shorthand path, such as 'dashboard#index', to check (optional).
# :html_options - Extra options to be passed to the list element (optional).
# block - An optional block that will become the contents of the returned
# `li` element.
#
# When both :controller and :action are specified, BOTH must match in order
# to be marked as active. When only one is given, either can match.
#
# Examples
#
# # Assuming we're on TreeController#show
#
# # Controller matches, but action doesn't
# nav_link(controller: [:tree, :refs], action: :edit) { "Hello" }
# # => '<li>Hello</li>'
#
# # Controller matches
# nav_link(controller: [:tree, :refs]) { "Hello" }
# # => '<li class="active">Hello</li>'
#
# # Shorthand path
# nav_link(path: 'tree#show') { "Hello" }
# # => '<li class="active">Hello</li>'
#
# # Supplying custom options for the list element
# nav_link(controller: :tree, html_options: {class: 'home'}) { "Hello" }
# # => '<li class="home active">Hello</li>'
#
# Returns a list item element String
def nav_link(options = {}, &block)
if path = options.delete(:path)
c, a, _ = path.split('#')
else
c = options.delete(:controller)
a = options.delete(:action)
end
if c && a
# When given both options, make sure BOTH are active
klass = current_controller?(*c) && current_action?(*a) ? 'active' : ''
else
# Otherwise check EITHER option
klass = current_controller?(*c) || current_action?(*a) ? 'active' : ''
end
# Add our custom class into the html_options, which may or may not exist
# and which may or may not already have a :class key
o = options.delete(:html_options) || {}
o[:class] ||= ''
o[:class] += ' ' + klass
o[:class].strip!
if block_given?
content_tag(:li, capture(&block), o)
else
content_tag(:li, nil, o)
end
end
def tab_class(tab_key)
active = case tab_key
......
require 'spec_helper'
describe TabHelper do
include ApplicationHelper
describe 'nav_link' do
before do
controller.stub!(:controller_name).and_return('foo')
stub!(:action_name).and_return('foo')
end
it "captures block output" do
nav_link { "Testing Blocks" }.should match(/Testing Blocks/)
end
it "performs checks on the current controller" do
nav_link(controller: :foo).should match(/<li class="active">/)
nav_link(controller: :bar).should_not match(/active/)
nav_link(controller: [:foo, :bar]).should match(/active/)
end
it "performs checks on the current action" do
nav_link(action: :foo).should match(/<li class="active">/)
nav_link(action: :bar).should_not match(/active/)
nav_link(action: [:foo, :bar]).should match(/active/)
end
it "performs checks on both controller and action when both are present" do
nav_link(controller: :bar, action: :foo).should_not match(/active/)
nav_link(controller: :foo, action: :bar).should_not match(/active/)
nav_link(controller: :foo, action: :foo).should match(/active/)
end
it "accepts a path shorthand" do
nav_link(path: 'foo#bar').should_not match(/active/)
nav_link(path: 'foo#foo').should match(/active/)
end
it "passes extra html options to the list element" do
nav_link(action: :foo, html_options: {class: 'home'}).should match(/<li class="home active">/)
nav_link(html_options: {class: 'active'}).should match(/<li class="active">/)
end
end
end
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