diff options
Diffstat (limited to 'actionview/lib/action_view/helpers/capture_helper.rb')
| -rw-r--r-- | actionview/lib/action_view/helpers/capture_helper.rb | 28 |
1 files changed, 17 insertions, 11 deletions
diff --git a/actionview/lib/action_view/helpers/capture_helper.rb b/actionview/lib/action_view/helpers/capture_helper.rb index 93c7cba395..c87c212cc7 100644 --- a/actionview/lib/action_view/helpers/capture_helper.rb +++ b/actionview/lib/action_view/helpers/capture_helper.rb @@ -1,16 +1,18 @@ -require 'active_support/core_ext/string/output_safety' +# frozen_string_literal: true + +require "active_support/core_ext/string/output_safety" module ActionView # = Action View Capture Helper - module Helpers + module Helpers #:nodoc: # CaptureHelper exposes methods to let you extract generated markup which # can be used in other parts of a template or layout file. # # It provides a method to capture blocks into variables through capture and - # a way to capture a block of markup for use in a layout through content_for. + # a way to capture a block of markup for use in a layout through {content_for}[rdoc-ref:ActionView::Helpers::CaptureHelper#content_for]. module CaptureHelper - # The capture method allows you to extract part of a template into a - # variable. You can then use this variable anywhere in your templates or layout. + # The capture method extracts part of a template as a String object. + # You can then use this object anywhere in your templates, layout, or helpers. # # The capture method can be used in ERB templates... # @@ -34,15 +36,19 @@ module ActionView # </body> # </html> # + # The return of capture is the string generated by the block. For Example: + # + # @greeting # => "Welcome to my shiny new web page! The date and time is 2018-09-06 11:09:16 -0500" + # def capture(*args) value = nil buffer = with_output_buffer { value = yield(*args) } - if string = buffer.presence || value and string.is_a?(String) + if (string = buffer.presence || value) && string.is_a?(String) ERB::Util.html_escape string end end - # Calling content_for stores a block of markup in an identifier for later use. + # Calling <tt>content_for</tt> stores a block of markup in an identifier for later use. # In order to access this stored content in other templates, helper modules # or the layout, you would pass the identifier as an argument to <tt>content_for</tt>. # @@ -108,7 +114,7 @@ module ActionView # That will place +script+ tags for your default set of JavaScript files on the page; # this technique is useful if you'll only be using these scripts in a few views. # - # Note that content_for concatenates (default) the blocks it is given for a particular + # Note that <tt>content_for</tt> concatenates (default) the blocks it is given for a particular # identifier in order. For example: # # <% content_for :navigation do %> @@ -125,7 +131,7 @@ module ActionView # # <ul><%= content_for :navigation %></ul> # - # If the flush parameter is true content_for replaces the blocks it is given. For example: + # If the flush parameter is +true+ <tt>content_for</tt> replaces the blocks it is given. For example: # # <% content_for :navigation do %> # <li><%= link_to 'Home', action: 'index' %></li> @@ -145,7 +151,7 @@ module ActionView # # <% content_for :script, javascript_include_tag(:defaults) %> # - # WARNING: content_for is ignored in caches. So you shouldn't use it for elements that will be fragment cached. + # WARNING: <tt>content_for</tt> is ignored in caches. So you shouldn't use it for elements that will be fragment cached. def content_for(name, content = nil, options = {}, &block) if content || block_given? if block_given? @@ -172,7 +178,7 @@ module ActionView result unless content end - # content_for? checks whether any content has been captured yet using `content_for`. + # <tt>content_for?</tt> checks whether any content has been captured yet using <tt>content_for</tt>. # Useful to render parts of your layout differently based on what is in your views. # # <%# This is the layout %> |