<?xml version="1.0" encoding="iso-8859-1"?> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html> <head> <title>excerpt (ActionView::Helpers::TextHelper)</title> <meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1" /> <link rel="stylesheet" href="../../../.././rdoc-style.css" type="text/css" media="screen" /> </head> <body class="standalone-code"> <pre><span class="ruby-comment cmt"># File lib/action_view/helpers/text_helper.rb, line 142</span> <span class="ruby-keyword kw">def</span> <span class="ruby-identifier">excerpt</span>(<span class="ruby-identifier">text</span>, <span class="ruby-identifier">phrase</span>, <span class="ruby-operator">*</span><span class="ruby-identifier">args</span>) <span class="ruby-identifier">options</span> = <span class="ruby-identifier">args</span>.<span class="ruby-identifier">extract_options!</span> <span class="ruby-keyword kw">unless</span> <span class="ruby-identifier">args</span>.<span class="ruby-identifier">empty?</span> <span class="ruby-identifier">options</span>[<span class="ruby-identifier">:radius</span>] = <span class="ruby-identifier">args</span>[<span class="ruby-value">0</span>] <span class="ruby-operator">||</span> <span class="ruby-value">100</span> <span class="ruby-identifier">options</span>[<span class="ruby-identifier">:omission</span>] = <span class="ruby-identifier">args</span>[<span class="ruby-value">1</span>] <span class="ruby-operator">||</span> <span class="ruby-value str">"..."</span> <span class="ruby-keyword kw">end</span> <span class="ruby-identifier">options</span>.<span class="ruby-identifier">reverse_merge!</span>(<span class="ruby-identifier">:radius</span> =<span class="ruby-operator">></span> <span class="ruby-value">100</span>, <span class="ruby-identifier">:omission</span> =<span class="ruby-operator">></span> <span class="ruby-value str">"..."</span>) <span class="ruby-keyword kw">if</span> <span class="ruby-identifier">text</span> <span class="ruby-operator">&&</span> <span class="ruby-identifier">phrase</span> <span class="ruby-identifier">phrase</span> = <span class="ruby-constant">Regexp</span>.<span class="ruby-identifier">escape</span>(<span class="ruby-identifier">phrase</span>) <span class="ruby-keyword kw">if</span> <span class="ruby-identifier">found_pos</span> = <span class="ruby-identifier">text</span>.<span class="ruby-identifier">mb_chars</span> <span class="ruby-operator">=~</span> <span class="ruby-node">/(#{phrase})/i</span> <span class="ruby-identifier">start_pos</span> = [ <span class="ruby-identifier">found_pos</span> <span class="ruby-operator">-</span> <span class="ruby-identifier">options</span>[<span class="ruby-identifier">:radius</span>], <span class="ruby-value">0</span> ].<span class="ruby-identifier">max</span> <span class="ruby-identifier">end_pos</span> = [ [ <span class="ruby-identifier">found_pos</span> <span class="ruby-operator">+</span> <span class="ruby-identifier">phrase</span>.<span class="ruby-identifier">mb_chars</span>.<span class="ruby-identifier">length</span> <span class="ruby-operator">+</span> <span class="ruby-identifier">options</span>[<span class="ruby-identifier">:radius</span>] <span class="ruby-operator">-</span> <span class="ruby-value">1</span>, <span class="ruby-value">0</span>].<span class="ruby-identifier">max</span>, <span class="ruby-identifier">text</span>.<span class="ruby-identifier">mb_chars</span>.<span class="ruby-identifier">length</span> ].<span class="ruby-identifier">min</span> <span class="ruby-identifier">prefix</span> = <span class="ruby-identifier">start_pos</span> <span class="ruby-operator">></span> <span class="ruby-value">0</span> <span class="ruby-operator">?</span> <span class="ruby-identifier">options</span>[<span class="ruby-identifier">:omission</span>] <span class="ruby-operator">:</span> <span class="ruby-value str">""</span> <span class="ruby-identifier">postfix</span> = <span class="ruby-identifier">end_pos</span> <span class="ruby-operator"><</span> <span class="ruby-identifier">text</span>.<span class="ruby-identifier">mb_chars</span>.<span class="ruby-identifier">length</span> <span class="ruby-operator">-</span> <span class="ruby-value">1</span> <span class="ruby-operator">?</span> <span class="ruby-identifier">options</span>[<span class="ruby-identifier">:omission</span>] <span class="ruby-operator">:</span> <span class="ruby-value str">""</span> <span class="ruby-identifier">prefix</span> <span class="ruby-operator">+</span> <span class="ruby-identifier">text</span>.<span class="ruby-identifier">mb_chars</span>[<span class="ruby-identifier">start_pos</span><span class="ruby-operator">..</span><span class="ruby-identifier">end_pos</span>].<span class="ruby-identifier">strip</span> <span class="ruby-operator">+</span> <span class="ruby-identifier">postfix</span> <span class="ruby-keyword kw">else</span> <span class="ruby-keyword kw">nil</span> <span class="ruby-keyword kw">end</span> <span class="ruby-keyword kw">end</span> <span class="ruby-keyword kw">end</span></pre> </body> </html>