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# encoding: UTF-8
#
# By Henrik Nyh <http://henrik.nyh.se> 2008-01-30.
# Free to modify and redistribute with credit.
# modified by Dave Nolan <http://textgoeshere.org.uk> 2008-02-06
# Ellipsis appended to text of last HTML node
# Ellipsis inserted after final word break
# modified by Mark Dickson <mark@sitesteaders.com> 2008-12-18
# Option to truncate to last full word
# Option to include a 'more' link
# Check for nil last child
# Copied from http://pastie.textmate.org/342485,
# based on http://henrik.nyh.se/2008/01/rails-truncate-html-helper
module TextHelper
def strip_and_truncate(text, options={})
truncate_text(strip_tags(text), options)
end
module_function :strip_and_truncate
def strip_tags(text)
text ||= ""
text.gsub(/<\/?[^>\n]*>/, "").gsub(/&#\d+;/) {|m| puts m; m[2..-1].to_i.chr rescue '' }.gsub(/&\w+;/, "")
end
def quote_clump(quote_lines)
txt = "<div class='quoted_text_holder'><a href='#' class='show_quoted_text_link'>#{TextHelper.escape_html(I18n.t('lib.text_helper.quoted_text_toggle', "show quoted text"))}</a><div class='quoted_text' style='display: none;'>"
txt += quote_lines.join("\n")
txt += "</div></div>"
txt
end
# http://daringfireball.net/2010/07/improved_regex_for_matching_urls
# released to the public domain
AUTO_LINKIFY_PLACEHOLDER = "LINK-PLACEHOLDER"
AUTO_LINKIFY_REGEX = %r{
\b
( # Capture 1: entire matched URL
(?:
https?:// # http or https protocol
| # or
www\d{0,3}[.] # "www.", "www1.", "www2." … "www999."
| # or
[a-z0-9.\-]+[.][a-z]{2,4}/ # looks like domain name followed by a slash
)
(?: # One or more:
[^\s()<>]+ # Run of non-space, non-()<>
| # or
\(([^\s()<>]+|(\([^\s()<>]+\)))*\) # balanced parens, up to 2 levels
)+
(?: # End with:
\(([^\s()<>]+|(\([^\s()<>]+\)))*\) # balanced parens, up to 2 levels
| # or
[^\s`!()\[\]{};:'".,<>?«»“”‘’] # not a space or one of these punct chars
)
) | (
#{AUTO_LINKIFY_PLACEHOLDER}
)
}xi
# Converts a plaintext message to html, with newlinification, quotification, and linkification
def format_message(message, url=nil, notification_id=nil)
# insert placeholders for the links we're going to generate, before we go and escape all the html
links = []
placeholder_blocks = []
message = message.gsub(AUTO_LINKIFY_REGEX) do |match|
placeholder_blocks << if match == AUTO_LINKIFY_PLACEHOLDER
AUTO_LINKIFY_PLACEHOLDER
else
s = $1
link = s
link = "http://#{link}" if link[0,3] == 'www'
link = add_notification_to_link(link, notification_id) if notification_id
link = URI.escape(link).gsub("'", "%27")
links << link
"<a href='#{ERB::Util.h(link)}'>#{ERB::Util.h(s)}</a>"
end
AUTO_LINKIFY_PLACEHOLDER
end
# now escape any html
message = TextHelper.escape_html(message)
# now put the links back in
message = message.gsub(AUTO_LINKIFY_PLACEHOLDER) do |match|
placeholder_blocks.shift
end
message = message.gsub(/\r?\n/, "<br/>\r\n")
processed_lines = []
quote_block = []
message.split("\n").each do |line|
# check for lines starting with '>'
if /^(&gt;|>)/ =~ line
quote_block << line
else
processed_lines << quote_clump(quote_block) if !quote_block.empty?
quote_block = []
processed_lines << line
end
end
processed_lines << quote_clump(quote_block) if !quote_block.empty?
message = processed_lines.join("\n")
if url
url = add_notification_to_link(url, notification_id) if notification_id
links.unshift url
end
links.unshift message
end
def add_notification_to_link(url, notification_id)
parts = "#{url}".split("#", 2)
link = parts[0]
link += link.match(/\?/) ? "&" : "?"
link += "clear_notification_id=#{notification_id}"
link += parts[1] if parts[1]
link
rescue
return ""
end
def truncate_text(text, options={})
truncated = text || ""
# truncate words
if options[:max_words]
word_separator = options[:word_separator] || I18n.t('lib.text_helper.word_separator', ' ')
truncated = truncated.split(word_separator)[0,options[:max_words]].join(word_separator)
end
max_length = options[:max_length] || 30
return truncated if truncated.length <= max_length
ellipsis = options[:ellipsis] || I18n.t('lib.text_helper.ellipsis', '...')
actual_length = max_length - ellipsis.length
# First truncate the text down to the bytes max, then lop off any invalid
# unicode characters at the end.
truncated = truncated[0,actual_length][/.{0,#{actual_length}}/mu]
truncated + ellipsis
end
def self.escape_html(text)
CGI::escapeHTML text
end
def self.unescape_html(text)
CGI::unescapeHTML text
end
def indent(text, spaces=2)
text = text.to_s rescue ""
indentation = " " * spaces
text.gsub(/\n/, "\n#{indentation}")
end
def force_zone(time)
(time.in_time_zone(@time_zone || Time.zone) rescue nil) || time
end
def self.date_string(start_date, *args)
return nil unless start_date
start_date = start_date.in_time_zone.to_date rescue start_date.to_date
style = args.last.is_a?(Symbol) ? args.pop : :normal
end_date = args.pop
end_date = end_date.in_time_zone.to_date rescue end_date.to_date if end_date
if end_date.nil? || start_date == end_date
date_component(start_date, style)
else
I18n.t('time.ranges.different_days', "%{start_date_and_time} to %{end_date_and_time}",
:start_date_and_time => date_component(start_date, style),
:end_date_and_time => date_component(end_date, style)
)
end
end
def self.date_component(start_date, style=:normal)
today = Time.zone.today
if style != :long
if style != :no_words
string = nil
return string if start_date == today && (string = I18n.t('date.days.today', 'Today')) && string.strip.present?
return string if start_date == today + 1 && (string = I18n.t('date.days.tomorrow', 'Tomorrow')) && string.strip.present?
return string if start_date == today - 1 && (string = I18n.t('date.days.yesterday', 'Yesterday')) && string.strip.present?
return string if start_date < today + 1.week && start_date >= today && (string = I18n.l(start_date, :format => :weekday) rescue nil) && string.strip.present?
end
return I18n.l(start_date, :format => :short) if start_date.year == today.year || style == :short
end
return I18n.l(start_date, :format => :medium)
end
def date_string(*args)
TextHelper.date_string(*args)
end
def time_string(start_time, end_time=nil)
start_time = start_time.in_time_zone rescue start_time
end_time = end_time.in_time_zone rescue end_time
return nil unless start_time
result = I18n.l(start_time, :format => start_time.min == 0 ? :tiny_on_the_hour : :tiny)
if end_time && end_time != start_time
result = I18n.t('time.ranges.times', "%{start_time} to %{end_time}", :start_time => result, :end_time => time_string(end_time))
end
result
end
def datetime_span(*args)
string = datetime_string(*args)
if string && !string.empty? && args[0]
"<span class='zone_cached_datetime' title='#{args[0].iso8601 rescue ""}'>#{string}</span>"
else
nil
end
end
def datetime_string(start_datetime, datetime_type=:event, end_datetime=nil, shorten_midnight=false)
start_datetime = start_datetime.in_time_zone rescue start_datetime
return nil unless start_datetime
end_datetime = end_datetime.in_time_zone rescue end_datetime
if !datetime_type.is_a?(Symbol)
datetime_type = :event
end_datetime = nil
end
end_datetime = nil if datetime_type == :due_date
def datetime_component(date_string, time, type)
if type == :due_date
I18n.t('time.due_date', "%{date} by %{time}", :date => date_string, :time => time_string(time))
else
I18n.t('time.event', "%{date} at %{time}", :date => date_string, :time => time_string(time))
end
end
start_date_string = date_string(start_datetime, datetime_type == :verbose ? :long : :no_words)
start_string = datetime_component(start_date_string, start_datetime, datetime_type)
if !end_datetime || end_datetime == start_datetime
if shorten_midnight && ((datetime_type == :due_date && start_datetime.hour == 23 && start_datetime.min == 59) || (datetime_type == :event && start_datetime.hour == 0 && start_datetime.min == 0))
start_date_string
else
start_string
end
else
if start_datetime.to_date == end_datetime.to_date
I18n.t('time.ranges.same_day', "%{date} from %{start_time} to %{end_time}", :date => start_date_string, :start_time => time_string(start_datetime), :end_time => time_string(end_datetime))
else
end_date_string = date_string(end_datetime, datetime_type == :verbose ? :long : :no_words)
end_string = datetime_component(end_date_string, end_datetime, datetime_type)
I18n.t('time.ranges.different_days', "%{start_date_and_time} to %{end_date_and_time}", :start_date_and_time => start_string, :end_date_and_time => end_string)
end
end
end
def time_ago_in_words_with_ago(time)
I18n.t('#time.with_ago', '%{time} ago', :time => (time_ago_in_words time rescue ''))
end
# more precise than distance_of_time_in_words, and takes a number of seconds,
# rather than two times. also assumes durations on the scale of hours or
# less, so doesn't bother with days, months, or years
def readable_duration(seconds)
# keys stolen from ActionView::Helpers::DateHelper#distance_of_time_in_words
case seconds
when 0...60
I18n.t('datetime.distance_in_words.x_seconds',
{ :one => "1 second", :other => "%{count} seconds" },
:count => seconds.round)
when 60...3600
I18n.t('datetime.distance_in_words.x_minutes',
{ :one => "1 minute", :other => "%{count} minutes" },
:count => (seconds / 60.0).round)
else
I18n.t('datetime.distance_in_words.about_x_hours',
{ :one => "about 1 hour", :other => "about %{count} hours" },
:count => (seconds / 3600.0).round)
end
end
def truncate_html(input, options={})
doc = Nokogiri::HTML(input)
options[:max_length] ||= 250
num_words = options[:num_words] || (options[:max_length] / 5) || 30
truncate_string = options[:ellipsis] || I18n.t('lib.text_helper.ellipsis', '...')
truncate_string += options[:link] if options[:link]
truncate_elem = Nokogiri::HTML("<span>" + truncate_string + "</span>").at("span")
current = doc.children.first
count = 0
while true
# we found a text node
if current.is_a?(Nokogiri::XML::Text)
count += current.text.split.length
# we reached our limit, let's get outta here!
break if count > num_words
previous = current
end
if current.children.length > 0
# this node has children, can't be a text node,
# lets descend and look for text nodes
current = current.children.first
elsif !current.next.nil?
#this has no children, but has a sibling, let's check it out
current = current.next
else
# we are the last child, we need to ascend until we are
# either done or find a sibling to continue on to
n = current
while !n.is_a?(Nokogiri::HTML::Document) and n.parent.next.nil?
n = n.parent
end
# we've reached the top and found no more text nodes, break
if n.is_a?(Nokogiri::HTML::Document)
break;
else
current = n.parent.next
end
end
end
if count >= num_words
unless count == num_words
new_content = current.text.split
# If we're here, the last text node we counted eclipsed the number of words
# that we want, so we need to cut down on words. The easiest way to think about
# this is that without this node we'd have fewer words than the limit, so all
# the previous words plus a limited number of words from this node are needed.
# We simply need to figure out how many words are needed and grab that many.
# Then we need to -subtract- an index, because the first word would be index zero.
# For example, given:
# <p>Testing this HTML truncater.</p><p>To see if its working.</p>
# Let's say I want 6 words. The correct returned string would be:
# <p>Testing this HTML truncater.</p><p>To see...</p>
# All the words in both paragraphs = 9
# The last paragraph is the one that breaks the limit. How many words would we
# have without it? 4. But we want up to 6, so we might as well get that many.
# 6 - 4 = 2, so we get 2 words from this node, but words #1-2 are indices #0-1, so
# we subtract 1. If this gives us -1, we want nothing from this node. So go back to
# the previous node instead.
index = num_words-(count-new_content.length)-1
if index >= 0
new_content = new_content[0..index]
current.add_previous_sibling(truncate_elem)
new_node = Nokogiri::XML::Text.new(new_content.join(' '), doc)
truncate_elem.add_previous_sibling(new_node)
current = truncate_elem
else
current = previous
# why would we do this next line? it just ends up xml escaping stuff
#current.content = current.content
current.add_next_sibling(truncate_elem)
current = truncate_elem
end
end
# remove everything else
while !current.is_a?(Nokogiri::HTML::Document)
while !current.next.nil?
current.next.remove
end
current = current.parent
end
end
# now we grab the html and not the text.
# we do first because nokogiri adds html and body tags
# which we don't want
res = doc.at_css('body').inner_html rescue nil
res ||= doc.root.children.first.inner_html rescue ""
res && res.html_safe
end
def self.make_subject_reply_to(subject)
blank_re = I18n.t('#subject_reply_to', "Re: %{subject}", :subject => '')
return subject if subject.starts_with?(blank_re)
I18n.t('#subject_reply_to', "Re: %{subject}", :subject => subject)
end
class MarkdownSafeBuffer < String; end
# use this to flag interpolated parameters as markdown-safe (see
# mt below) so they get eval'ed rather than escaped, e.g.
# mt(:add_description, :example => markdown_safe('`1 + 1 = 2`'))
def markdown_safe(string)
MarkdownSafeBuffer.new(string)
end
def markdown_escape(string)
return string if string.is_a?(MarkdownSafeBuffer)
markdown_safe(string.gsub(/([\\`\*_\{\}\[\]\(\)\#\+\-\.!])/, '\\\\\1'))
end
# use this rather than t() if the translation contains trusted markdown
def mt(*args)
inlinify = :auto
if args.last.is_a?(Hash)
options = args.last
inlinify = options.delete(:inlinify) if options.has_key?(:inlinify)
options.each_pair do |key, value|
next unless value.is_a?(String) && !value.is_a?(MarkdownSafeBuffer) && !value.is_a?(ActiveSupport::SafeBuffer)
next if key == :wrapper
options[key] = markdown_escape(value).gsub(/\s+/, ' ').strip
end
end
translated = t(*args)
translated = ERB::Util.h(translated) unless translated.html_safe?
result = RDiscount.new(translated).to_html.strip
# Strip wrapping <p></p> if inlinify == :auto && they completely wrap the result && there are not multiple <p>'s
result.gsub!(/<\/?p>/, '') if inlinify == :auto && result =~ /\A<p>.*<\/p>\z/m && !(result =~ /.*<p>.*<p>.*/m)
result.html_safe.strip
end
end
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