This release upgrades Instiki to Rails 2.3.4, which patches two security holes in Rails. See http://weblog.rubyonrails.org/2009/9/4/ruby-on-rails-2-3-4 There are also some new features, and the usual boatload of bugfixes. See the CHANGELOG for details.
588 lines
25 KiB
Ruby
588 lines
25 KiB
Ruby
require 'action_view/helpers/tag_helper'
|
|
|
|
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
|
|
# 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"
|
|
# # is the equivalent of <%= "hello" %>
|
|
#
|
|
# if (logged_in == true):
|
|
# concat "Logged in!"
|
|
# else
|
|
# concat link_to('login', :action => login)
|
|
# end
|
|
# # will either display "Logged in!" or a login link
|
|
# %>
|
|
def concat(string, unused_binding = nil)
|
|
if unused_binding
|
|
ActiveSupport::Deprecation.warn("The binding argument of #concat is no longer needed. Please remove it from your views and helpers.", caller)
|
|
end
|
|
|
|
output_buffer << string
|
|
end
|
|
|
|
# Truncates a given +text+ after a given <tt>:length</tt> if +text+ is longer than <tt>:length</tt>
|
|
# (defaults to 30). The last characters will be replaced with the <tt>:omission</tt> (defaults to "...")
|
|
# for a total length not exceeding <tt>:length</tt>.
|
|
#
|
|
# ==== Examples
|
|
#
|
|
# truncate("Once upon a time in a world far far away")
|
|
# # => Once upon a time in a world...
|
|
#
|
|
# truncate("Once upon a time in a world far far away", :length => 14)
|
|
# # => Once upon a...
|
|
#
|
|
# truncate("And they found that many people were sleeping better.", :length => 25, "(clipped)")
|
|
# # => And they found t(clipped)
|
|
#
|
|
# truncate("And they found that many people were sleeping better.", :omission => "... (continued)", :length => 25)
|
|
# # => And they f... (continued)
|
|
#
|
|
# You can still use <tt>truncate</tt> with the old API that accepts the
|
|
# +length+ as its optional second and the +ellipsis+ as its
|
|
# optional third parameter:
|
|
# truncate("Once upon a time in a world far far away", 14)
|
|
# # => Once upon a...
|
|
#
|
|
# truncate("And they found that many people were sleeping better.", 25, "... (continued)")
|
|
# # => And they f... (continued)
|
|
def truncate(text, *args)
|
|
options = args.extract_options!
|
|
unless args.empty?
|
|
ActiveSupport::Deprecation.warn('truncate takes an option hash instead of separate ' +
|
|
'length and omission arguments', caller)
|
|
|
|
options[:length] = args[0] || 30
|
|
options[:omission] = args[1] || "..."
|
|
end
|
|
options.reverse_merge!(:length => 30, :omission => "...")
|
|
|
|
if text
|
|
l = options[:length] - options[:omission].mb_chars.length
|
|
chars = text.mb_chars
|
|
(chars.length > options[:length] ? chars[0...l] + options[:omission] : text).to_s
|
|
end
|
|
end
|
|
|
|
# Highlights one or more +phrases+ everywhere in +text+ by inserting it into
|
|
# a <tt>:highlighter</tt> string. The highlighter can be specialized by passing <tt>:highlighter</tt>
|
|
# 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'], :highlighter => '<em>\1</em>')
|
|
# # => You searched <em>for</em>: <em>rails</em>
|
|
#
|
|
# highlight('You searched for: rails', 'rails', :highlighter => '<a href="search?q=\1">\1</a>')
|
|
# # => You searched for: <a href="search?q=rails">rails</a>
|
|
#
|
|
# You can still use <tt>highlight</tt> with the old API that accepts the
|
|
# +highlighter+ as its optional third parameter:
|
|
# 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, *args)
|
|
options = args.extract_options!
|
|
unless args.empty?
|
|
options[:highlighter] = args[0] || '<strong class="highlight">\1</strong>'
|
|
end
|
|
options.reverse_merge!(: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, options[:highlighter])
|
|
end
|
|
end
|
|
|
|
# Extracts an excerpt from +text+ that matches the first instance of +phrase+.
|
|
# The <tt>:radius</tt> option expands the excerpt on each side of the first occurrence of +phrase+ by the number of characters
|
|
# defined in <tt>:radius</tt> (which defaults to 100). If the excerpt radius overflows the beginning or end of the +text+,
|
|
# then the <tt>:omission</tt> option (which defaults to "...") will be prepended/appended accordingly. The resulting string
|
|
# will be stripped in any case. If the +phrase+ isn't found, nil is returned.
|
|
#
|
|
# ==== Examples
|
|
# excerpt('This is an example', 'an', :radius => 5)
|
|
# # => ...s is an exam...
|
|
#
|
|
# excerpt('This is an example', 'is', :radius => 5)
|
|
# # => This is a...
|
|
#
|
|
# excerpt('This is an example', 'is')
|
|
# # => This is an example
|
|
#
|
|
# excerpt('This next thing is an example', 'ex', :radius => 2)
|
|
# # => ...next...
|
|
#
|
|
# excerpt('This is also an example', 'an', :radius => 8, :omission => '<chop> ')
|
|
# # => <chop> is also an example
|
|
#
|
|
# You can still use <tt>excerpt</tt> with the old API that accepts the
|
|
# +radius+ as its optional third and the +ellipsis+ as its
|
|
# optional forth parameter:
|
|
# excerpt('This is an example', 'an', 5) # => ...s is an exam...
|
|
# excerpt('This is also an example', 'an', 8, '<chop> ') # => <chop> is also an example
|
|
def excerpt(text, phrase, *args)
|
|
options = args.extract_options!
|
|
unless args.empty?
|
|
options[:radius] = args[0] || 100
|
|
options[:omission] = args[1] || "..."
|
|
end
|
|
options.reverse_merge!(:radius => 100, :omission => "...")
|
|
|
|
if text && phrase
|
|
phrase = Regexp.escape(phrase)
|
|
|
|
if found_pos = text.mb_chars =~ /(#{phrase})/i
|
|
start_pos = [ found_pos - options[:radius], 0 ].max
|
|
end_pos = [ [ found_pos + phrase.mb_chars.length + options[:radius] - 1, 0].max, text.mb_chars.length ].min
|
|
|
|
prefix = start_pos > 0 ? options[:omission] : ""
|
|
postfix = end_pos < text.mb_chars.length - 1 ? options[:omission] : ""
|
|
|
|
prefix + text.mb_chars[start_pos..end_pos].strip + postfix
|
|
else
|
|
nil
|
|
end
|
|
end
|
|
end
|
|
|
|
# Attempts to pluralize the +singular+ word unless +count+ is 1. If
|
|
# +plural+ is supplied, it will use that when count is > 1, otherwise
|
|
# it will use the Inflector to determine the plural form
|
|
#
|
|
# ==== 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} " + ((count == 1 || count == '1') ? singular : (plural || singular.pluralize))
|
|
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')
|
|
# # => Once upon a time
|
|
#
|
|
# word_wrap('Once upon a time, in a kingdom called Far Far Away, a king fell ill, and finding a successor to the throne turned out to be more trouble than anyone could have imagined...')
|
|
# # => Once upon a time, in a kingdom called Far Far Away, a king fell ill, and finding\n a successor to the throne turned out to be more trouble than anyone could have\n imagined...
|
|
#
|
|
# word_wrap('Once upon a time', :line_width => 8)
|
|
# # => Once upon\na time
|
|
#
|
|
# word_wrap('Once upon a time', :line_width => 1)
|
|
# # => Once\nupon\na\ntime
|
|
#
|
|
# You can still use <tt>word_wrap</tt> with the old API that accepts the
|
|
# +line_width+ as its optional second parameter:
|
|
# word_wrap('Once upon a time', 8) # => Once upon\na time
|
|
def word_wrap(text, *args)
|
|
options = args.extract_options!
|
|
unless args.blank?
|
|
options[:line_width] = args[0] || 80
|
|
end
|
|
options.reverse_merge!(:line_width => 80)
|
|
|
|
text.split("\n").collect do |line|
|
|
line.length > options[:line_width] ? line.gsub(/(.{1,#{options[:line_width]}})(\s+|$)/, "\\1\n").strip : line
|
|
end * "\n"
|
|
end
|
|
|
|
# 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>"
|
|
#
|
|
# textilize("This is worded <strong>strongly</strong>")
|
|
# # => "<p>This is worded <strong>strongly</strong></p>"
|
|
#
|
|
# textilize("This is worded <strong>strongly</strong>", :filter_html)
|
|
# # => "<p>This is worded <strong>strongly</strong></p>"
|
|
#
|
|
def textilize(text, *options)
|
|
options ||= [:hard_breaks]
|
|
|
|
if text.blank?
|
|
""
|
|
else
|
|
textilized = RedCloth.new(text, options)
|
|
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 requires RedCloth[http://whytheluckystiff.net/ruby/redcloth/]
|
|
# to be 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
|
|
|
|
# Returns the text with all the Markdown codes turned into HTML tags.
|
|
# <i>This method requires BlueCloth[http://www.deveiate.org/projects/BlueCloth] or another
|
|
# Markdown library to be installed.</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? ? "" : Markdown.new(text).to_html
|
|
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+.
|
|
#
|
|
# You can pass any HTML attributes into <tt>html_options</tt>. These
|
|
# will be added to all created paragraphs.
|
|
# ==== Examples
|
|
# my_text = "Here is some basic text...\n...with a line break."
|
|
#
|
|
# simple_format(my_text)
|
|
# # => "<p>Here is some basic text...\n<br />...with a line break.</p>"
|
|
#
|
|
# more_text = "We want to put a paragraph...\n\n...right there."
|
|
#
|
|
# simple_format(more_text)
|
|
# # => "<p>We want to put a paragraph...</p>\n\n<p>...right there.</p>"
|
|
#
|
|
# simple_format("Look ma! A class!", :class => 'description')
|
|
# # => "<p class='description'>Look ma! A class!</p>"
|
|
def simple_format(text, html_options={})
|
|
start_tag = tag('p', html_options, true)
|
|
text = text.to_s.dup
|
|
text.gsub!(/\r\n?/, "\n") # \r\n and \r -> \n
|
|
text.gsub!(/\n\n+/, "</p>\n\n#{start_tag}") # 2+ newline -> paragraph
|
|
text.gsub!(/([^\n]\n)(?=[^\n])/, '\1<br />') # 1 newline -> br
|
|
text.insert 0, start_tag
|
|
text << "</p>"
|
|
end
|
|
|
|
# Turns all URLs and e-mail addresses into clickable links. The <tt>:link</tt> option
|
|
# will limit what should be linked. You can add HTML attributes to the links using
|
|
# <tt>:href_options</tt>. Possible values for <tt>:link</tt> 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", :link => :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", :link => :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, :href_options => { :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>."
|
|
#
|
|
#
|
|
# You can still use <tt>auto_link</tt> with the old API that accepts the
|
|
# +link+ as its optional second parameter and the +html_options+ hash
|
|
# as its optional third parameter:
|
|
# post_body = "Welcome to my new blog at http://www.myblog.com/. Please e-mail me at me@email.com."
|
|
# auto_link(post_body, :urls) # => Once upon\na time
|
|
# # => "Welcome to my new blog at <a href=\"http://www.myblog.com/\">http://www.myblog.com</a>.
|
|
# Please e-mail me at me@email.com."
|
|
#
|
|
# auto_link(post_body, :all, :target => "_blank") # => Once upon\na time
|
|
# # => "Welcome to my new blog at <a href=\"http://www.myblog.com/\" target=\"_blank\">http://www.myblog.com</a>.
|
|
# Please e-mail me at <a href=\"mailto:me@email.com\">me@email.com</a>."
|
|
def auto_link(text, *args, &block)#link = :all, href_options = {}, &block)
|
|
return '' if text.blank?
|
|
|
|
options = args.size == 2 ? {} : args.extract_options! # this is necessary because the old auto_link API has a Hash as its last parameter
|
|
unless args.empty?
|
|
options[:link] = args[0] || :all
|
|
options[:html] = args[1] || {}
|
|
end
|
|
options.reverse_merge!(:link => :all, :html => {})
|
|
|
|
case options[:link].to_sym
|
|
when :all then auto_link_email_addresses(auto_link_urls(text, options[:html], &block), options[:html], &block)
|
|
when :email_addresses then auto_link_email_addresses(text, options[:html], &block)
|
|
when :urls then auto_link_urls(text, options[:html], &block)
|
|
end
|
|
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. The default name for a cycle without a +:name+ key is
|
|
# <tt>"default"</tt>. You can manually reset a cycle by calling reset_cycle
|
|
# and passing the name of the cycle. The current cycle string can be obtained
|
|
# anytime using the current_cycle method.
|
|
#
|
|
# ==== 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
|
|
|
|
# Returns the current cycle string after a cycle has been started. Useful
|
|
# for complex table highlighing or any other design need which requires
|
|
# the current cycle string in more than one place.
|
|
#
|
|
# ==== Example
|
|
# # Alternate background colors
|
|
# @items = [1,2,3,4]
|
|
# <% @items.each do |item| %>
|
|
# <div style="background-color:<%= cycle("red","white","blue") %>">
|
|
# <span style="background-color:<%= current_cycle %>"><%= item %></span>
|
|
# </div>
|
|
# <% end %>
|
|
def current_cycle(name = "default")
|
|
cycle = get_cycle(name)
|
|
cycle.current_value unless cycle.nil?
|
|
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 current_value
|
|
@values[previous_index].to_s
|
|
end
|
|
|
|
def to_s
|
|
value = @values[@index].to_s
|
|
@index = next_index
|
|
return value
|
|
end
|
|
|
|
private
|
|
|
|
def next_index
|
|
step_index(1)
|
|
end
|
|
|
|
def previous_index
|
|
step_index(-1)
|
|
end
|
|
|
|
def step_index(n)
|
|
(@index + n) % @values.size
|
|
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{
|
|
( https?:// | www\. )
|
|
[^\s<]+
|
|
}x unless const_defined?(:AUTO_LINK_RE)
|
|
|
|
BRACKETS = { ']' => '[', ')' => '(', '}' => '{' }
|
|
|
|
# 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, html_options = {})
|
|
link_attributes = html_options.stringify_keys
|
|
text.gsub(AUTO_LINK_RE) do
|
|
href = $&
|
|
punctuation = ''
|
|
left, right = $`, $'
|
|
# detect already linked URLs and URLs in the middle of a tag
|
|
if left =~ /<[^>]+$/ && right =~ /^[^>]*>/
|
|
# do not change string; URL is alreay linked
|
|
href
|
|
else
|
|
# don't include trailing punctuation character as part of the URL
|
|
if href.sub!(/[^\w\/-]$/, '') and punctuation = $& and opening = BRACKETS[punctuation]
|
|
if href.scan(opening).size > href.scan(punctuation).size
|
|
href << punctuation
|
|
punctuation = ''
|
|
end
|
|
end
|
|
|
|
link_text = block_given?? yield(href) : href
|
|
href = 'http://' + href unless href.index('http') == 0
|
|
|
|
content_tag(:a, h(link_text), link_attributes.merge('href' => href)) + punctuation
|
|
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, html_options = {})
|
|
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
|
|
mail_to text, display_text, html_options
|
|
end
|
|
end
|
|
end
|
|
end
|
|
end
|
|
end
|