feat(simplifiedAutoLink): add support for GFM autolinks

Github Flavored Markdown detects urls and mails embeded in the text without any extra markup or delimiter.
This commit adds this feature to showdown through an option called "simplifiedAutoLink".
Related to #164

Gruntfile.js

@@ -95,15 +95,42 @@ module.exports = function (grunt) {
           timeout: 3000,
           ignoreLeaks: false,
           reporter: 'spec'
-        },
-        issues: {
-          src: 'test/node/testsuite.issues.js',
-          options: {
-            globals: ['should'],
-            timeout: 3000,
-            ignoreLeaks: false,
-            reporter: 'spec'
-          }
+        }
+      },
+      issues: {
+        src: 'test/node/testsuite.issues.js',
+        options: {
+          globals: ['should'],
+          timeout: 3000,
+          ignoreLeaks: false,
+          reporter: 'spec'
+        }
+      },
+      standard: {
+        src: 'test/node/testsuite.standard.js',
+        options: {
+          globals: ['should'],
+          timeout: 3000,
+          ignoreLeaks: false,
+          reporter: 'spec'
+        }
+      },
+      features: {
+        src: 'test/node/testsuite.features.js',
+        options: {
+          globals: ['should'],
+          timeout: 3000,
+          ignoreLeaks: false,
+          reporter: 'spec'
+        }
+      },
+      single: {
+        src: 'test/node/**/*.js',
+        options: {
+          globals: ['should'],
+          timeout: 3000,
+          ignoreLeaks: false,
+          reporter: 'spec'
         }
       }
     }
@@ -113,6 +140,21 @@ module.exports = function (grunt) {
 
   require('load-grunt-tasks')(grunt);
 
+  grunt.registerTask('single-test', function (grep) {
+    'use strict';
+    grunt.config.merge({
+      simplemocha: {
+        single: {
+          options: {
+            grep: grep
+          }
+        }
+      }
+    });
+
+    grunt.task.run('simplemocha:node');
+  });
+
   grunt.registerTask('concatenate', ['concat:dist']);
   grunt.registerTask('lint', ['jshint', 'jscs']);
   grunt.registerTask('test', ['lint', 'concat:test', 'simplemocha:node', 'clean']);

src/showdown.js

@@ -11,7 +11,8 @@ var showdown = {},
       prefixHeaderId:          false,
       noHeaderId:              false,
       headerLevelStart:        1,
-      parseImgDimensions:      false
+      parseImgDimensions:      false,
+      simplifiedAutoLink:      false
     },
     globalOptions = JSON.parse(JSON.stringify(defaultOptions)); //clone default options out of laziness =P
 

src/subParsers/autoLinks.js

@@ -1,28 +1,27 @@
-showdown.subParser('autoLinks', function (text) {
+showdown.subParser('autoLinks', function (text, options) {
   'use strict';
 
-  text = text.replace(/<((https?|ftp|dict):[^'">\s]+)>/gi, '<a href=\"$1\">$1</a>');
+  //simpleURLRegex  = /\b(((https?|ftp|dict):\/\/|www\.)[-.+~:?#@!$&'()*,;=[\]\w]+)\b/gi,
 
+  var simpleURLRegex  = /\b(((https?|ftp|dict):\/\/|www\.)[^'">\s]+\.[^'">\s]+)(?=\s|$)(?!["<>])/gi,
+      delimUrlRegex   = /<(((https?|ftp|dict):\/\/|www\.)[^'">\s]+)>/gi,
+      simpleMailRegex = /\b(?:mailto:)?([-.\w]+@[-a-z0-9]+(\.[-a-z0-9]+)*\.[a-z]+)\b/gi,
+      delimMailRegex  = /<(?:mailto:)?([-.\w]+@[-a-z0-9]+(\.[-a-z0-9]+)*\.[a-z]+)>/gi;
+
+  text = text.replace(delimUrlRegex, '<a href=\"$1\">$1</a>');
+  text = text.replace(delimMailRegex, replaceMail);
+  //simpleURLRegex  = /\b(((https?|ftp|dict):\/\/|www\.)[-.+~:?#@!$&'()*,;=[\]\w]+)\b/gi,
   // Email addresses: <address@domain.foo>
 
-  /*
-   text = text.replace(/
-   <
-   (?:mailto:)?
-   (
-   [-.\w]+
-   \@
-   [-a-z0-9]+(\.[-a-z0-9]+)*\.[a-z]+
-   )
-   >
-   /gi);
-   */
-  var pattern = /<(?:mailto:)?([-.\w]+\@[-a-z0-9]+(\.[-a-z0-9]+)*\.[a-z]+)>/gi;
-  text = text.replace(pattern, function (wholeMatch, m1) {
+  if (options.simplifiedAutoLink) {
+    text = text.replace(simpleURLRegex, '<a href=\"$1\">$1</a>');
+    text = text.replace(simpleMailRegex, '<a href=\"$1\">$1</a>');
+  }
+
+  function replaceMail(wholeMatch, m1) {
     var unescapedStr = showdown.subParser('unescapeSpecialChars')(m1);
     return showdown.subParser('encodeEmailAddress')(unescapedStr);
-  });
+  }
 
   return text;
-
 });

test/features/#164.1.simple_autolink.html

@@ -0,0 +1,11 @@
+<p>foo.bar</p>
+
+<p>www.foobar</p>
+
+<p><a href="www.foobar.com">www.foobar.com</a></p>
+
+<p><a href="http://foobar.com">http://foobar.com</a></p>
+
+<p><a href="https://www.foobar.com/baz?bazinga=nhecos;">https://www.foobar.com/baz?bazinga=nhecos;</a></p>
+
+<p><a href="http://www.google.com/">http://www.google.com</a></p>

test/features/#164.1.simple_autolink.md

@@ -0,0 +1,11 @@
+foo.bar
+
+www.foobar
+
+www.foobar.com
+
+http://foobar.com
+
+https://www.foobar.com/baz?bazinga=nhecos;
+
+<a href="http://www.google.com/">http://www.google.com</a>

test/node/showdown.js

@@ -22,7 +22,8 @@ describe('showdown.options', function () {
         prefixHeaderId:          false,
         noHeaderId:              false,
         headerLevelStart:        1,
-        parseImgDimensions:      false
+        parseImgDimensions:      false,
+        simplifiedAutoLink:      false
       };
       expect(showdown.getDefaultOptions()).to.be.eql(opts);
     });

test/node/testsuite.features.js

@@ -14,6 +14,8 @@ describe('makeHtml() features testsuite', function () {
       converter = new showdown.Converter({parseImgDimensions: true});
     } else if (testsuite[i].name === '#69.header_level_start') {
       converter = new showdown.Converter({headerLevelStart: 3});
+    } else if (testsuite[i].name === '#164.1.simple_autolink') {
+      converter = new showdown.Converter({simplifiedAutoLink: true});
     } else {
       converter = new showdown.Converter();
     }

test/single.test.wrapper.js

@@ -0,0 +1,13 @@
+/**
+ * Created by Estevao on 10-07-2015.
+ */
+/*
+var showdown = require('../dist/showdown.js'),
+  bootstrap = require('./bootstrap.js'),
+  assertion = bootstrap.assertion,
+  testsuite = bootstrap.getTestSuite('test/features/');
+
+describe('makeHtml() single test', function () {
+  'use strict';
+});
+*/