fixing URI.withinString to accept optional start-of-URI regular expression - closing #115

Author: rodneyrehm

README.md

@@ -233,6 +233,7 @@ URI.js is published under the [MIT license](http://www.opensource.org/licenses/m
 * fixing `URI.protocol_expression` to properly accept `.` in compliance with [RFC 3986 - Scheme](http://tools.ietf.org/html/rfc3986#section-3.1) - ([Issue #132](https://github.com/medialize/URI.js/issues/132))
 * fixing [`URI.withinString()`](http://medialize.github.com/URI.js/docs.html#static-withinString) to not use backtracking prone regular expression `URI.find_uri_expression` anymore - ([Issue #131](https://github.com/medialize/URI.js/issues/131))
 * fixing [`URI.withinString()`](http://medialize.github.com/URI.js/docs.html#static-withinString) to accept options `ignore` and `ignoreHtml` to allow better control over which detected URLs get handled - ([Issue #117](https://github.com/medialize/URI.js/issues/117))
+* fixing [`URI.withinString()`](http://medialize.github.com/URI.js/docs.html#static-withinString) to accept option `start` to specify the RegExp used for finding the beginning of an URL (defaults to `/\b(?:([a-z][a-z0-9.+-]*:\/\/)|www\.)/gi`) - ([Issue #115](https://github.com/medialize/URI.js/issues/115))
 
 ### 1.11.2 (August 14th 2013) ###
 

docs.html

@@ -1289,6 +1289,17 @@ <h3 id="static-withinString">URI.withinString()</h3>
 &lt;img src=&quot;http://example.org/image.png&quot; alt=&quot;&quot;&gt; is HTML,
 &lt;a href='http://example.org/target.html'&gt; is HTML&lt;/a&gt;,
 &lt;a href=http://example.org/target.html&gt; is HTML, too&lt;/a&gt;
+*/
+
+// custom URI beginning pattern
+source = "That example.com/ is just a domain";
+result = URI.withinString(source, decorate, {
+  // "scheme://" or "www." or "domain.tld/"
+  start: /\b(?:([a-z][a-z0-9.+-]*:\/\/)|www\.|[a-z]+\.[a-z]{2,4}\/)/gi
+});
+
+/* result is:
+That <strong>&lt;code&gt;example.com/&lt;/code&gt;</strong> is just a domain
 */</pre>
 
     <h3 id="static-iso8859">URI.iso8859()</h3>

src/URI.js

@@ -186,8 +186,11 @@ URI.ip6_expression = /^\s*((([0-9A-Fa-f]{1,4}:){7}([0-9A-Fa-f]{1,4}|:))|(([0-9A-
 // * http://rodneyrehm.de/t/url-regex.html
 URI.find_uri_expression = /\b((?:[a-z][\w-]+:(?:\/{1,3}|[a-z0-9%])|www\d{0,3}[.]|[a-z0-9.\-]+[.][a-z]{2,4}\/)(?:[^\s()<>]+|\(([^\s()<>]+|(\([^\s()<>]+\)))*\))+(?:\(([^\s()<>]+|(\([^\s()<>]+\)))*\)|[^\s`!()\[\]{};:'".,<>?«»“”‘’]))/ig;
 URI.findUri = {
+    // valid "scheme://" or "www."
     start: /\b(?:([a-z][a-z0-9.+-]*:\/\/)|www\.)/gi,
+    // everything up to the next whitespace
     end: /[\s\r\n]|$/,
+    // trim trailing punctuation captured by end RegExp
     trim: /[`!()\[\]{};:'".,<>?«»“”„‘’]+$/
 };
 // http://www.iana.org/assignments/uri-schemes.html