Initial commit
This commit is contained in:
Nicolas Sanguinetti
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(The MIT License)
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Copyright (c) 2008-2009 Nicolas Sanguinetti, entp.com
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Permission is hereby granted, free of charge, to any person obtaining
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a copy of this software and associated documentation files (the
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'Software'), to deal in the Software without restriction, including
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without limitation the rights to use, copy, modify, merge, publish,
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distribute, sublicense, and/or sell copies of the Software, and to
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permit persons to whom the Software is furnished to do so, subject to
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the following conditions:
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The above copyright notice and this permission notice shall be
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included in all copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED 'AS IS', WITHOUT WARRANTY OF ANY KIND,
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EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
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IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
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CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
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TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
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SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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= ContentFor
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Small extension for the Sinatra[http://sinatrarb.com] web framework
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that allows you to use the following helpers in your views:
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<% content_for :some_key do %>
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<chunk of="html">...</chunk>
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<% end %>
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<% yield_content :some_key %>
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This allows you to capture blocks inside views to be rendered later
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in this request. For example, to populate different parts of your
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layout from your view.
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== Usage
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If you're writing "classic" style apps, then requring
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<tt>sinatra/content_for</tt> should be enough. If you're writing
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"classy" apps, then you also need to call
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<tt>helpers Sinatra::ContentFor</tt> in your app definition.
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== And how is this useful?
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For example, some of your views might need a few javascript tags and
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stylesheets, but you don't want to force this files in all your pages.
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Then you can put <tt><% yield_content :scripts_and_styles %></tt> on
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your layout, inside the <head> tag, and each view can call
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<tt>content_for</tt> setting the appropriate set of tags that should
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be added to the layout.
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== Warning
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This only works with ERB as a rendering mechanism. I haven't figured
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how to make it work with Haml. If you find a way, contact me and I'll
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include it.
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== Credits
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Code by foca[http://github.com/foca], inspired on the Ruby on Rails
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helpers with the same name.
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module Sinatra
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module ContentFor
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def content_for(key, &block)
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content_blocks[key.to_sym] << block
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end
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def yield_content(key)
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content_blocks[key.to_sym].map {|content| content.call }.join("")
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end
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private
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def content_blocks
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@content_blocks ||= Hash.new {|h,k| h[k] = [] }
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end
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end
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helpers ContentFor
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end
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ENV['RACK_ENV'] = 'test'
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begin
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require 'rack'
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rescue LoadError
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require 'rubygems'
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require 'rack'
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end
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require 'contest'
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require 'sinatra/test'
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require File.dirname(__FILE__) + '/../lib/sinatra/content_for'
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Sinatra::Base.set :environment, :test
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module Sinatra
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class Base
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set :environment, :test
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helpers ContentFor
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end
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end
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class Test::Unit::TestCase
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include Sinatra::Test
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class << self
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alias_method :it, :test
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end
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def mock_app(base=Sinatra::Base, &block)
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@app = Sinatra.new(base, &block)
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end
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end
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class ContentForTest < Test::Unit::TestCase
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def erb_app(view)
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mock_app {
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layout { '<% yield_content :foo %>' }
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get('/') { erb view }
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}
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end
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it 'renders blocks declared with the same key you use when rendering' do
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erb_app '<% content_for :foo do %>foo<% end %>'
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get '/'
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assert ok?
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assert_equal 'foo', body
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end
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it 'does not render a block with a different key' do
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erb_app '<% content_for :bar do %>bar<% end %>'
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get '/'
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assert ok?
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assert_equal '', body
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end
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it 'renders multiple blocks with the same key' do
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erb_app <<-erb_snippet
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<% content_for :foo do %>foo<% end %>
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<% content_for :foo do %>bar<% end %>
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<% content_for :baz do %>WON'T RENDER ME<% end %>
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<% content_for :foo do %>baz<% end %>
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erb_snippet
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get '/'
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assert ok?
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assert_equal 'foobarbaz', body
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end
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end
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