require 'action_view/helpers/tag_helper'
require 'html/document'
module ActionView
module Helpers #:nodoc:
# The TextHelper module provides a set of methods for filtering, formatting
# and transforming strings, which can reduce the amount of inline Ruby code in
# your views. These helper methods extend ActionView making them callable
# within your template files.
module TextHelper
def self.included(base)
base.extend(ClassMethods)
end
# The preferred method of outputting text in your views is to use the
# <%= "text" %> eRuby syntax. The regular _puts_ and _print_ methods
# do not operate as expected in an eRuby code block. If you absolutely must
# output text within a non-output code block (i.e., <% %>), you can use the concat method.
#
# ==== Examples
# <%
# concat "hello", binding
# # is the equivalent of <%= "hello" %>
#
# if (logged_in == true):
# concat "Logged in!", binding
# else
# concat link_to('login', :action => login), binding
# end
# # will either display "Logged in!" or a login link
# %>
def concat(string, binding)
eval(ActionView::Base.erb_variable, binding) << string
end
# If +text+ is longer than +length+, +text+ will be truncated to the length of
# +length+ (defaults to 30) and the last characters will be replaced with the +truncate_string+
# (defaults to "...").
#
# ==== Examples
# truncate("Once upon a time in a world far far away", 14)
# # => Once upon a...
#
# truncate("Once upon a time in a world far far away")
# # => Once upon a time in a world f...
#
# truncate("And they found that many people were sleeping better.", 25, "(clipped)")
# # => And they found that many (clipped)
#
# truncate("And they found that many people were sleeping better.", 15, "... (continued)")
# # => And they found... (continued)
def truncate(text, length = 30, truncate_string = "...")
if text.nil? then return end
l = length - truncate_string.chars.length
(text.chars.length > length ? text.chars[0...l] + truncate_string : text).to_s
end
# Highlights one or more +phrases+ everywhere in +text+ by inserting it into
# a +highlighter+ string. The highlighter can be specialized by passing +highlighter+
# as a single-quoted string with \1 where the phrase is to be inserted (defaults to
# '<strong class="highlight">\1</strong>')
#
# ==== Examples
# highlight('You searched for: rails', 'rails')
# # => You searched for: <strong class="highlight">rails</strong>
#
# highlight('You searched for: ruby, rails, dhh', 'actionpack')
# # => You searched for: ruby, rails, dhh
#
# highlight('You searched for: rails', ['for', 'rails'], '<em>\1</em>')
# # => You searched <em>for</em>: <em>rails</em>
#
# highlight('You searched for: rails', 'rails', "<a href='search?q=\1'>\1</a>")
# # => You searched for: <a href='search?q=rails>rails</a>
def highlight(text, phrases, highlighter = '<strong class="highlight">\1</strong>')
if text.blank? || phrases.blank?
text
else
match = Array(phrases).map { |p| Regexp.escape(p) }.join('|')
text.gsub(/(#{match})/i, highlighter)
end
end
# Extracts an excerpt from +text+ that matches the first instance of +phrase+.
# The +radius+ expands the excerpt on each side of the first occurrence of +phrase+ by the number of characters
# defined in +radius+ (which defaults to 100). If the excerpt radius overflows the beginning or end of the +text+,
# then the +excerpt_string+ will be prepended/appended accordingly. If the +phrase+
# isn't found, nil is returned.
#
# ==== Examples
# excerpt('This is an example', 'an', 5)
# # => "...s is an examp..."
#
# excerpt('This is an example', 'is', 5)
# # => "This is an..."
#
# excerpt('This is an example', 'is')
# # => "This is an example"
#
# excerpt('This next thing is an example', 'ex', 2)
# # => "...next t..."
#
# excerpt('This is also an example', 'an', 8, '<chop> ')
# # => "<chop> is also an example"
def excerpt(text, phrase, radius = 100, excerpt_string = "...")
if text.nil? || phrase.nil? then return end
phrase = Regexp.escape(phrase)
if found_pos = text.chars =~ /(#{phrase})/i
start_pos = [ found_pos - radius, 0 ].max
end_pos = [ found_pos + phrase.chars.length + radius, text.chars.length ].min
prefix = start_pos > 0 ? excerpt_string : ""
postfix = end_pos < text.chars.length ? excerpt_string : ""
prefix + text.chars[start_pos..end_pos].strip + postfix
else
nil
end
end
# Attempts to pluralize the +singular+ word unless +count+ is 1. If +plural+
# is supplied, it will use that when count is > 1, if the ActiveSupport Inflector
# is loaded, it will use the Inflector to determine the plural form, otherwise
# it will just add an 's' to the +singular+ word.
#
# ==== Examples
# pluralize(1, 'person')
# # => 1 person
#
# pluralize(2, 'person')
# # => 2 people
#
# pluralize(3, 'person', 'users')
# # => 3 users
#
# pluralize(0, 'person')
# # => 0 people
def pluralize(count, singular, plural = nil)
"#{count || 0} " + if count == 1 || count == '1'
singular
elsif plural
plural
elsif Object.const_defined?("Inflector")
Inflector.pluralize(singular)
else
singular + "s"
end
end
# Wraps the +text+ into lines no longer than +line_width+ width. This method
# breaks on the first whitespace character that does not exceed +line_width+
# (which is 80 by default).
#
# ==== Examples
# word_wrap('Once upon a time', 4)
# # => Once\nupon\na\ntime
#
# word_wrap('Once upon a time', 8)
# # => Once upon\na time
#
# word_wrap('Once upon a time')
# # => Once upon a time
#
# word_wrap('Once upon a time', 1)
# # => Once\nupon\na\ntime
def word_wrap(text, line_width = 80)
text.split("\n").collect do |line|
line.length > line_width ? line.gsub(/(.{1,#{line_width}})(\s+|$)/, "\\1\n").strip : line
end * "\n"
end
begin
require_library_or_gem "redcloth" unless Object.const_defined?(:RedCloth)
# Returns the text with all the Textile[http://www.textism.com/tools/textile] codes turned into HTML tags.
#
# You can learn more about Textile's syntax at its website[http://www.textism.com/tools/textile].
# <i>This method is only available if RedCloth[http://whytheluckystiff.net/ruby/redcloth/]
# is available</i>.
#
# ==== Examples
# textilize("*This is Textile!* Rejoice!")
# # => "<p><strong>This is Textile!</strong> Rejoice!</p>"
#
# textilize("I _love_ ROR(Ruby on Rails)!")
# # => "<p>I <em>love</em> <acronym title="Ruby on Rails">ROR</acronym>!</p>"
#
# textilize("h2. Textile makes markup -easy- simple!")
# # => "<h2>Textile makes markup <del>easy</del> simple!</h2>"
#
# textilize("Visit the Rails website "here":http://www.rubyonrails.org/.)
# # => "<p>Visit the Rails website <a href="http://www.rubyonrails.org/">here</a>.</p>"
def textilize(text)
if text.blank?
""
else
textilized = RedCloth.new(text, [ :hard_breaks ])
textilized.hard_breaks = true if textilized.respond_to?("hard_breaks=")
textilized.to_html
end
end
# Returns the text with all the Textile codes turned into HTML tags,
# but without the bounding <p> tag that RedCloth adds.
#
# You can learn more about Textile's syntax at its website[http://www.textism.com/tools/textile].
# <i>This method is only available if RedCloth[http://whytheluckystiff.net/ruby/redcloth/]
# is available</i>.
#
# ==== Examples
# textilize_without_paragraph("*This is Textile!* Rejoice!")
# # => "<strong>This is Textile!</strong> Rejoice!"
#
# textilize_without_paragraph("I _love_ ROR(Ruby on Rails)!")
# # => "I <em>love</em> <acronym title="Ruby on Rails">ROR</acronym>!"
#
# textilize_without_paragraph("h2. Textile makes markup -easy- simple!")
# # => "<h2>Textile makes markup <del>easy</del> simple!</h2>"
#
# textilize_without_paragraph("Visit the Rails website "here":http://www.rubyonrails.org/.)
# # => "Visit the Rails website <a href="http://www.rubyonrails.org/">here</a>."
def textilize_without_paragraph(text)
textiled = textilize(text)
if textiled[0..2] == "<p>" then textiled = textiled[3..-1] end
if textiled[-4..-1] == "</p>" then textiled = textiled[0..-5] end
return textiled
end
rescue LoadError
# We can't really help what's not there
end
begin
require_library_or_gem "bluecloth" unless Object.const_defined?(:BlueCloth)
# Returns the text with all the Markdown codes turned into HTML tags.
# <i>This method is only available if BlueCloth[http://www.deveiate.org/projects/BlueCloth]
# is available</i>.
#
# ==== Examples
# markdown("We are using __Markdown__ now!")
# # => "<p>We are using <strong>Markdown</strong> now!</p>"
#
# markdown("We like to _write_ `code`, not just _read_ it!")
# # => "<p>We like to <em>write</em> <code>code</code>, not just <em>read</em> it!</p>"
#
# markdown("The [Markdown website](http://daringfireball.net/projects/markdown/) has more information.")
# # => "<p>The <a href="http://daringfireball.net/projects/markdown/">Markdown website</a>
# # has more information.</p>"
#
# markdown('![The ROR logo](http://rubyonrails.com/images/rails.png "Ruby on Rails")')
# # => '<p><img src="http://rubyonrails.com/images/rails.png" alt="The ROR logo" title="Ruby on Rails" /></p>'
def markdown(text)
text.blank? ? "" : BlueCloth.new(text).to_html
end
rescue LoadError
# We can't really help what's not there
end
# Returns +text+ transformed into HTML using simple formatting rules.
# Two or more consecutive newlines(<tt>\n\n</tt>) are considered as a
# paragraph and wrapped in <tt><p></tt> tags. One newline (<tt>\n</tt>) is
# considered as a linebreak and a <tt><br /></tt> tag is appended. This
# method does not remove the newlines from the +text+.
#
# ==== Examples
# my_text = """Here is some basic text...
# ...with a line break."""
#
# simple_format(my_text)
# # => "<p>Here is some basic text...<br />...with a line break.</p>"
#
# more_text = """We want to put a paragraph...
#
# ...right there."""
#
# simple_format(more_text)
# # => "<p>We want to put a paragraph...</p><p>...right there.</p>"
def simple_format(text)
content_tag 'p', text.to_s.
gsub(/\r\n?/, "\n"). # \r\n and \r -> \n
gsub(/\n\n+/, "</p>\n\n<p>"). # 2+ newline -> paragraph
gsub(/([^\n]\n)(?=[^\n])/, '\1<br />') # 1 newline -> br
end
# Turns all URLs and e-mail addresses into clickable links. The +link+ parameter
# will limit what should be linked. You can add HTML attributes to the links using
# +href_options+. Options for +link+ are <tt>:all</tt> (default),
# <tt>:email_addresses</tt>, and <tt>:urls</tt>. If a block is given, each URL and
# e-mail address is yielded and the result is used as the link text.
#
# ==== Examples
# auto_link("Go to http://www.rubyonrails.org and say hello to david@loudthinking.com")
# # => "Go to <a href="http://www.rubyonrails.org">http://www.rubyonrails.org</a> and
# # say hello to <a href="mailto:david@loudthinking.com">david@loudthinking.com</a>"
#
# auto_link("Visit http://www.loudthinking.com/ or e-mail david@loudthinking.com", :urls)
# # => "Visit <a href=\"http://www.loudthinking.com/\">http://www.loudthinking.com/</a>
# # or e-mail david@loudthinking.com"
#
# auto_link("Visit http://www.loudthinking.com/ or e-mail david@loudthinking.com", :email_addresses)
# # => "Visit http://www.loudthinking.com/ or e-mail <a href=\"mailto:david@loudthinking.com\">david@loudthinking.com</a>"
#
# post_body = "Welcome to my new blog at http://www.myblog.com/. Please e-mail me at me@email.com."
# auto_link(post_body, :all, :target => '_blank') do |text|
# truncate(text, 15)
# end
# # => "Welcome to my new blog at <a href=\"http://www.myblog.com/\" target=\"_blank\">http://www.m...</a>.
# Please e-mail me at <a href=\"mailto:me@email.com\">me@email.com</a>."
#
def auto_link(text, link = :all, href_options = {}, &block)
return '' if text.blank?
case link
when :all then auto_link_email_addresses(auto_link_urls(text, href_options, &block), &block)
when :email_addresses then auto_link_email_addresses(text, &block)
when :urls then auto_link_urls(text, href_options, &block)
end
end
# Strips all link tags from +text+ leaving just the link text.
#
# ==== Examples
# strip_links('<a href="http://www.rubyonrails.org">Ruby on Rails</a>')
# # => Ruby on Rails
#
# strip_links('Please e-mail me at <a href="mailto:me@email.com">me@email.com</a>.')
# # => Please e-mail me at me@email.com.
#
# strip_links('Blog: <a href="http://www.myblog.com/" class="nav" target=\"_blank\">Visit</a>.')
# # => Blog: Visit
def strip_links(html)
if !html.blank? && (html.index("<a") || html.index("<href")) && html.index(">")
tokenizer = HTML::Tokenizer.new(html)
result = returning [] do |result|
while token = tokenizer.next
node = HTML::Node.parse(nil, 0, 0, token, false)
result << node.to_s unless node.is_a?(HTML::Tag) && ["a", "href"].include?(node.name)
end
end.join
result == html ? result : strip_links(result) # Recurse - handle all dirty nested links
else
html
end
end
# This #sanitize helper will html encode all tags and strip all attributes that aren't specifically allowed.
# It also strips href/src tags with invalid protocols, like javascript: especially. It does its best to counter any
# tricks that hackers may use, like throwing in unicode/ascii/hex values to get past the javascript: filters. Check out
# the extensive test suite.
#
# <%= sanitize @article.body %>
#
# You can add or remove tags/attributes if you want to customize it a bit. See ActionView::Base for full docs on the
# available options. You can add tags/attributes for single uses of #sanitize by passing either the :attributes or :tags options:
#
# Normal Use
#
# <%= sanitize @article.body %>
#
# Custom Use
#
# <%= sanitize @article.body, :tags => %w(table tr td), :attributes => %w(id class style)
#
# Add table tags
#
# Rails::Initializer.run do |config|
# config.action_view.sanitized_allowed_tags = 'table', 'tr', 'td'
# end
#
# Remove tags
#
# Rails::Initializer.run do |config|
# config.after_initialize do
# ActionView::Base.sanitized_allowed_tags.delete 'div'
# end
# end
#
# Change allowed attributes
#
# Rails::Initializer.run do |config|
# config.action_view.sanitized_allowed_attributes = 'id', 'class', 'style'
# end
#
def sanitize(html, options = {})
return html if html.blank? || !html.include?('<')
attrs = options.key?(:attributes) ? Set.new(options[:attributes]).merge(sanitized_allowed_attributes) : sanitized_allowed_attributes
tags = options.key?(:tags) ? Set.new(options[:tags] ).merge(sanitized_allowed_tags) : sanitized_allowed_tags
returning [] do |new_text|
tokenizer = HTML::Tokenizer.new(html)
parent = []
while token = tokenizer.next
node = HTML::Node.parse(nil, 0, 0, token, false)
new_text << case node
when HTML::Tag
if node.closing == :close
parent.shift
else
parent.unshift node.name
end
node.attributes.keys.each do |attr_name|
value = node.attributes[attr_name].to_s
if !attrs.include?(attr_name) || contains_bad_protocols?(attr_name, value)
node.attributes.delete(attr_name)
else
node.attributes[attr_name] = attr_name == 'style' ? sanitize_css(value) : CGI::escapeHTML(value)
end
end if node.attributes
tags.include?(node.name) ? node : nil
else
sanitized_bad_tags.include?(parent.first) ? nil : node.to_s.gsub(/</, "<")
end
end
end.join
end
# Sanitizes a block of css code. Used by #sanitize when it comes across a style attribute
def sanitize_css(style)
# disallow urls
style = style.to_s.gsub(/url\s*\(\s*[^\s)]+?\s*\)\s*/, ' ')
# gauntlet
if style !~ /^([:,;#%.\sa-zA-Z0-9!]|\w-\w|\'[\s\w]+\'|\"[\s\w]+\"|\([\d,\s]+\))*$/ ||
style !~ /^(\s*[-\w]+\s*:\s*[^:;]*(;|$))*$/
return ''
end
returning [] do |clean|
style.scan(/([-\w]+)\s*:\s*([^:;]*)/) do |prop,val|
if sanitized_allowed_css_properties.include?(prop.downcase)
clean << prop + ': ' + val + ';'
elsif sanitized_shorthand_css_properties.include?(prop.split('-')[0].downcase)
unless val.split().any? do |keyword|
!sanitized_allowed_css_keywords.include?(keyword) &&
keyword !~ /^(#[0-9a-f]+|rgb\(\d+%?,\d*%?,?\d*%?\)?|\d{0,2}\.?\d{0,2}(cm|em|ex|in|mm|pc|pt|px|%|,|\))?)$/
end
clean << prop + ': ' + val + ';'
end
end
end
end.join(' ')
end
# Strips all HTML tags from the +html+, including comments. This uses the
# html-scanner tokenizer and so its HTML parsing ability is limited by
# that of html-scanner.
#
# ==== Examples
#
# strip_tags("Strip <i>these</i> tags!")
# # => Strip these tags!
#
# strip_tags("<b>Bold</b> no more! <a href='more.html'>See more here</a>...")
# # => Bold no more! See more here...
#
# strip_tags("<div id='top-bar'>Welcome to my website!</div>")
# # => Welcome to my website!
def strip_tags(html)
return html if html.blank? || !html.index("<")
tokenizer = HTML::Tokenizer.new(html)
text = returning [] do |text|
while token = tokenizer.next
node = HTML::Node.parse(nil, 0, 0, token, false)
# result is only the content of any Text nodes
text << node.to_s if node.class == HTML::Text
end
end
# strip any comments, and if they have a newline at the end (ie. line with
# only a comment) strip that too
result = text.join.gsub(/<!--(.*?)-->[\n]?/m, "")
# Recurse - handle all dirty nested tags
result == html ? result : strip_tags(result)
end
# Creates a Cycle object whose _to_s_ method cycles through elements of an
# array every time it is called. This can be used for example, to alternate
# classes for table rows. You can use named cycles to allow nesting in loops.
# Passing a Hash as the last parameter with a <tt>:name</tt> key will create a
# named cycle. You can manually reset a cycle by calling reset_cycle and passing the
# name of the cycle.
#
# ==== Examples
# # Alternate CSS classes for even and odd numbers...
# @items = [1,2,3,4]
# <table>
# <% @items.each do |item| %>
# <tr class="<%= cycle("even", "odd") -%>">
# <td>item</td>
# </tr>
# <% end %>
# </table>
#
#
# # Cycle CSS classes for rows, and text colors for values within each row
# @items = x = [{:first => 'Robert', :middle => 'Daniel', :last => 'James'},
# {:first => 'Emily', :middle => 'Shannon', :maiden => 'Pike', :last => 'Hicks'},
# {:first => 'June', :middle => 'Dae', :last => 'Jones'}]
# <% @items.each do |item| %>
# <tr class="<%= cycle("even", "odd", :name => "row_class")
# <td>
# <% item.values.each do |value| %>
# <%# Create a named cycle "colors" %>
# <span style="color:<%= cycle("red", "green", "blue", :name => "colors") -%>">
# <%= value %>
# </span>
# <% end %>
# <% reset_cycle("colors") %>
# </td>
# </tr>
# <% end %>
def cycle(first_value, *values)
if (values.last.instance_of? Hash)
params = values.pop
name = params[:name]
else
name = "default"
end
values.unshift(first_value)
cycle = get_cycle(name)
if (cycle.nil? || cycle.values != values)
cycle = set_cycle(name, Cycle.new(*values))
end
return cycle.to_s
end
# Resets a cycle so that it starts from the first element the next time
# it is called. Pass in +name+ to reset a named cycle.
#
# ==== Example
# # Alternate CSS classes for even and odd numbers...
# @items = [[1,2,3,4], [5,6,3], [3,4,5,6,7,4]]
# <table>
# <% @items.each do |item| %>
# <tr class="<%= cycle("even", "odd") -%>">
# <% item.each do |value| %>
# <span style="color:<%= cycle("#333", "#666", "#999", :name => "colors") -%>">
# <%= value %>
# </span>
# <% end %>
#
# <% reset_cycle("colors") %>
# </tr>
# <% end %>
# </table>
def reset_cycle(name = "default")
cycle = get_cycle(name)
cycle.reset unless cycle.nil?
end
class Cycle #:nodoc:
attr_reader :values
def initialize(first_value, *values)
@values = values.unshift(first_value)
reset
end
def reset
@index = 0
end
def to_s
value = @values[@index].to_s
@index = (@index + 1) % @values.size
return value
end
end
# A regular expression of the valid characters used to separate protocols like
# the ':' in 'http://foo.com'
@@sanitized_protocol_separator = /:|(�*58)|(p)|(%|%)3A/
mattr_accessor :sanitized_protocol_separator, :instance_writer => false
# Specifies a Set of HTML attributes that can have URIs.
@@sanitized_uri_attributes = Set.new(%w(href src cite action longdesc xlink:href lowsrc))
mattr_reader :sanitized_uri_attributes
# Specifies a Set of 'bad' tags that the #sanitize helper will remove completely, as opposed
# to just escaping harmless tags like <font>
@@sanitized_bad_tags = Set.new(%w(script))
mattr_reader :sanitized_bad_tags
# Specifies the default Set of tags that the #sanitize helper will allow unscathed.
@@sanitized_allowed_tags = Set.new(%w(strong em b i p code pre tt output samp kbd var sub
sup dfn cite big small address hr br div span h1 h2 h3 h4 h5 h6 ul ol li dt dd abbr
acronym a img blockquote del ins fieldset legend))
mattr_reader :sanitized_allowed_tags
# Specifies the default Set of html attributes that the #sanitize helper will leave
# in the allowed tag.
@@sanitized_allowed_attributes = Set.new(%w(href src width height alt cite datetime title class name xml:lang abbr))
mattr_reader :sanitized_allowed_attributes
# Specifies the default Set of acceptable css properties that #sanitize and #sanitize_css will accept.
@@sanitized_allowed_css_properties = Set.new(%w(azimuth background-color border-bottom-color border-collapse
border-color border-left-color border-right-color border-top-color clear color cursor direction display
elevation float font font-family font-size font-style font-variant font-weight height letter-spacing line-height
overflow pause pause-after pause-before pitch pitch-range richness speak speak-header speak-numeral speak-punctuation
speech-rate stress text-align text-decoration text-indent unicode-bidi vertical-align voice-family volume white-space
width))
mattr_reader :sanitized_allowed_css_properties
# Specifies the default Set of acceptable css keywords that #sanitize and #sanitize_css will accept.
@@sanitized_allowed_css_keywords = Set.new(%w(auto aqua black block blue bold both bottom brown center
collapse dashed dotted fuchsia gray green !important italic left lime maroon medium none navy normal
nowrap olive pointer purple red right solid silver teal top transparent underline white yellow))
mattr_reader :sanitized_allowed_css_keywords
# Specifies the default Set of allowed shorthand css properties for the #sanitize and #sanitize_css helpers.
@@sanitized_shorthand_css_properties = Set.new(%w(background border margin padding))
mattr_reader :sanitized_shorthand_css_properties
# Specifies the default Set of protocols that the #sanitize helper will leave in
# protocol attributes.
@@sanitized_allowed_protocols = Set.new(%w(ed2k ftp http https irc mailto news gopher nntp telnet webcal xmpp callto feed svn urn aim rsync tag ssh sftp rtsp afs))
mattr_reader :sanitized_allowed_protocols
module ClassMethods #:nodoc:
def self.extended(base)
class << base
# we want these to be class methods on ActionView::Base, they'll get mattr_readers for these below.
[:sanitized_protocol_separator, :sanitized_uri_attributes, :sanitized_bad_tags, :sanitized_allowed_tags,
:sanitized_allowed_attributes, :sanitized_allowed_css_properties, :sanitized_allowed_css_keywords,
:sanitized_shorthand_css_properties, :sanitized_allowed_protocols, :sanitized_protocol_separator=].each do |prop|
delegate prop, :to => TextHelper
end
end
end
# Adds valid HTML attributes that the #sanitize helper checks for URIs.
#
# Rails::Initializer.run do |config|
# config.action_view.sanitized_uri_attributes = 'lowsrc', 'target'
# end
#
def sanitized_uri_attributes=(attributes)
Helpers::TextHelper.sanitized_uri_attributes.merge(attributes)
end
# Adds to the Set of 'bad' tags for the #sanitize helper.
#
# Rails::Initializer.run do |config|
# config.action_view.sanitized_bad_tags = 'embed', 'object'
# end
#
def sanitized_bad_tags=(attributes)
Helpers::TextHelper.sanitized_bad_tags.merge(attributes)
end
# Adds to the Set of allowed tags for the #sanitize helper.
#
# Rails::Initializer.run do |config|
# config.action_view.sanitized_allowed_tags = 'table', 'tr', 'td'
# end
#
def sanitized_allowed_tags=(attributes)
Helpers::TextHelper.sanitized_allowed_tags.merge(attributes)
end
# Adds to the Set of allowed html attributes for the #sanitize helper.
#
# Rails::Initializer.run do |config|
# config.action_view.sanitized_allowed_attributes = 'onclick', 'longdesc'
# end
#
def sanitized_allowed_attributes=(attributes)
Helpers::TextHelper.sanitized_allowed_attributes.merge(attributes)
end
# Adds to the Set of allowed css properties for the #sanitize and #sanitize_css heleprs.
#
# Rails::Initializer.run do |config|
# config.action_view.sanitized_allowed_css_properties = 'expression'
# end
#
def sanitized_allowed_css_properties=(attributes)
Helpers::TextHelper.sanitized_allowed_css_properties.merge(attributes)
end
# Adds to the Set of allowed css keywords for the #sanitize and #sanitize_css helpers.
#
# Rails::Initializer.run do |config|
# config.action_view.sanitized_allowed_css_keywords = 'expression'
# end
#
def sanitized_allowed_css_keywords=(attributes)
Helpers::TextHelper.sanitized_allowed_css_keywords.merge(attributes)
end
# Adds to the Set of allowed shorthand css properties for the #sanitize and #sanitize_css helpers.
#
# Rails::Initializer.run do |config|
# config.action_view.sanitized_shorthand_css_properties = 'expression'
# end
#
def sanitized_shorthand_css_properties=(attributes)
Helpers::TextHelper.sanitized_shorthand_css_properties.merge(attributes)
end
# Adds to the Set of allowed protocols for the #sanitize helper.
#
# Rails::Initializer.run do |config|
# config.action_view.sanitized_allowed_protocols = 'ssh', 'feed'
# end
#
def sanitized_allowed_protocols=(attributes)
Helpers::TextHelper.sanitized_allowed_protocols.merge(attributes)
end
end
private
# The cycle helpers need to store the cycles in a place that is
# guaranteed to be reset every time a page is rendered, so it
# uses an instance variable of ActionView::Base.
def get_cycle(name)
@_cycles = Hash.new unless defined?(@_cycles)
return @_cycles[name]
end
def set_cycle(name, cycle_object)
@_cycles = Hash.new unless defined?(@_cycles)
@_cycles[name] = cycle_object
end
AUTO_LINK_RE = %r{
( # leading text
<\w+.*?>| # leading HTML tag, or
[^=!:'"/]| # leading punctuation, or
^ # beginning of line
)
(
(?:https?://)| # protocol spec, or
(?:www\.) # www.*
)
(
[-\w]+ # subdomain or domain
(?:\.[-\w]+)* # remaining subdomains or domain
(?::\d+)? # port
(?:/(?:(?:[~\w\+@%-]|(?:[,.;:][^\s$]))+)?)* # path
(?:\?[\w\+@%&=.;-]+)? # query string
(?:\#[\w\-]*)? # trailing anchor
)
([[:punct:]]|\s|<|$) # trailing text
}x unless const_defined?(:AUTO_LINK_RE)
# Turns all urls into clickable links. If a block is given, each url
# is yielded and the result is used as the link text.
def auto_link_urls(text, href_options = {})
extra_options = tag_options(href_options.stringify_keys) || ""
text.gsub(AUTO_LINK_RE) do
all, a, b, c, d = $&, $1, $2, $3, $4
if a =~ /<a\s/i # don't replace URL's that are already linked
all
else
text = b + c
text = yield(text) if block_given?
%(#{a}<a href="#{b=="www."?"http://www.":b}#{c}"#{extra_options}>#{text}</a>#{d})
end
end
end
# Turns all email addresses into clickable links. If a block is given,
# each email is yielded and the result is used as the link text.
def auto_link_email_addresses(text)
body = text.dup
text.gsub(/([\w\.!#\$%\-+.]+@[A-Za-z0-9\-]+(\.[A-Za-z0-9\-]+)+)/) do
text = $1
if body.match(/<a\b[^>]*>(.*)(#{Regexp.escape(text)})(.*)<\/a>/)
text
else
display_text = (block_given?) ? yield(text) : text
%{<a href="mailto:#{text}">#{display_text}</a>}
end
end
end
def contains_bad_protocols?(attr_name, value)
sanitized_uri_attributes.include?(attr_name) &&
(value =~ /(^[^\/:]*):|(�*58)|(p)|(%|%)3A/ && !sanitized_allowed_protocols.include?(value.split(sanitized_protocol_separator).first))
end
end
end
end