From c0b71555723774624915162582095f9873f85b91 Mon Sep 17 00:00:00 2001
From: Emanuil Rusev <hello@erusev.com>
Date: Thu, 26 Dec 2013 21:53:48 +0200
Subject: [PATCH] implement link titles

---
 Parsedown.php                   | 29 ++++++++++++++++++++++++-----
 tests/data/inline_title.html    |  1 +
 tests/data/inline_title.md      |  1 +
 tests/data/reference_title.html |  1 +
 tests/data/reference_title.md   |  1 +
 5 files changed, 28 insertions(+), 5 deletions(-)
 create mode 100644 tests/data/inline_title.html
 create mode 100644 tests/data/inline_title.md
 create mode 100644 tests/data/reference_title.html
 create mode 100644 tests/data/reference_title.md

diff --git a/Parsedown.php b/Parsedown.php
index ca9eb3d..2466077 100755
--- a/Parsedown.php
+++ b/Parsedown.php
@@ -401,11 +401,18 @@ class Parsedown
 
 					# reference
 
-					if (preg_match('/^\[(.+?)\]:[ ]*([^ ]+)/', $deindented_line, $matches))
+					if (preg_match('/^\[(.+?)\]:[ ]*(.+?)(?:[ ]+[\'"](.+?)[\'"])?[ ]*$/', $deindented_line, $matches))
 					{
 						$label = strtolower($matches[1]);
 
-						$this->reference_map[$label] = trim($matches[2], '<>');;
+						$this->reference_map[$label] = array(
+							'»' => trim($matches[2], '<>'),
+						);
+
+						if (isset($matches[3]))
+						{
+							$this->reference_map[$label]['#'] = $matches[3];
+						}
 
 						continue 2;
 					}
@@ -734,10 +741,15 @@ class Parsedown
 
 						$remaining_text = substr($text, $offset);
 
-						if ($remaining_text[0] === '(' and preg_match('/^\((.*?)\)/', $remaining_text, $matches))
+						if ($remaining_text[0] === '(' and preg_match('/\([ ]*(.*?)(?:[ ]+[\'"](.+?)[\'"])?[ ]*\)/', $remaining_text, $matches))
 						{
 							$element['»'] = $matches[1];
 
+							if (isset($matches[2]))
+							{
+								$element['#'] = $matches[2];
+							}
+
 							$offset += strlen($matches[0]);
 						}
 						elseif ($this->reference_map)
@@ -755,7 +767,12 @@ class Parsedown
 
 							if (isset($this->reference_map[$reference]))
 							{
-								$element['»'] = $this->reference_map[$reference];
+								$element['»'] = $this->reference_map[$reference]['»'];
+
+								if (isset($this->reference_map[$reference]['#']))
+								{
+									$element['#'] = $this->reference_map[$reference]['#'];
+								}
 							}
 							else
 							{
@@ -781,7 +798,9 @@ class Parsedown
 						{
 							$element['a'] = $this->parse_span_elements($element['a'], $markers);
 
-							$markup .= '<a href="'.$element['»'].'">'.$element['a'].'</a>';
+							$markup .= isset($element['#'])
+								? '<a href="'.$element['»'].'" title="'.$element['#'].'">'.$element['a'].'</a>'
+								: '<a href="'.$element['»'].'">'.$element['a'].'</a>';
 						}
 
 						unset($element);
diff --git a/tests/data/inline_title.html b/tests/data/inline_title.html
new file mode 100644
index 0000000..bbab93b
--- /dev/null
+++ b/tests/data/inline_title.html
@@ -0,0 +1 @@
+<p><a href="http://example.com" title="Example">single quotes</a> and <a href="http://example.com" title="Example">double quotes</a></p>
\ No newline at end of file
diff --git a/tests/data/inline_title.md b/tests/data/inline_title.md
new file mode 100644
index 0000000..cb09344
--- /dev/null
+++ b/tests/data/inline_title.md
@@ -0,0 +1 @@
+[single quotes](http://example.com 'Example') and [double quotes](http://example.com "Example")
\ No newline at end of file
diff --git a/tests/data/reference_title.html b/tests/data/reference_title.html
new file mode 100644
index 0000000..70e589a
--- /dev/null
+++ b/tests/data/reference_title.html
@@ -0,0 +1 @@
+<p><a href="http://example.com" title="Title">single quotes</a> and <a href="http://example.com" title="Title">double quotes</a></p>
\ No newline at end of file
diff --git a/tests/data/reference_title.md b/tests/data/reference_title.md
new file mode 100644
index 0000000..162b832
--- /dev/null
+++ b/tests/data/reference_title.md
@@ -0,0 +1 @@
+[single quotes](http://example.com 'Title') and [double quotes](http://example.com "Title")
\ No newline at end of file