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skip extra work if no text or phrase was provided

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This commit is contained in:
Aaron Patterson 2010-10-18 10:28:56 -07:00
parent dda81cb177
commit ca59ec354e
1 changed files with 11 additions and 12 deletions
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23
actionpack/lib/action_view/helpers/text_helper.rb
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@ -134,6 +134,8 @@ module ActionView
# 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)
return unless text && phrase
options = args.extract_options!
unless args.empty?
options[:radius] = args[0] || 100
@ -141,20 +143,17 @@ module ActionView
end
options.reverse_merge!(:radius => 100, :omission => "...")
if text && phrase
phrase = Regexp.escape(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
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 = 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
prefix + text.mb_chars[start_pos..end_pos].strip + postfix
else
nil
end
end