From 766b4317cc2f5ffc9fb54485801df8fc4e1c3921 Mon Sep 17 00:00:00 2001
From: Kazuyuki Hayashi <hayashi@valnur.net>
Date: Thu, 23 Jan 2014 17:13:37 +0900
Subject: [PATCH] Fixes #27 [URL Auto-linking] URL inside <code>

---
 .../Extension/Gfm/UrlAutoLinkExtension.php      | 17 ++++++++++++++++-
 test/Ciconia/Resources/gfm/link-in-code-span.md |  4 +++-
 .../Ciconia/Resources/gfm/link-in-code-span.out |  4 +++-
 test/Ciconia/Resources/gfm/link-in-codeblock.md |  3 +++
 .../Ciconia/Resources/gfm/link-in-codeblock.out |  2 ++
 5 files changed, 27 insertions(+), 3 deletions(-)
 create mode 100644 test/Ciconia/Resources/gfm/link-in-codeblock.md
 create mode 100644 test/Ciconia/Resources/gfm/link-in-codeblock.out

diff --git a/src/Ciconia/Extension/Gfm/UrlAutoLinkExtension.php b/src/Ciconia/Extension/Gfm/UrlAutoLinkExtension.php
index 35bc58e..0cbe546 100644
--- a/src/Ciconia/Extension/Gfm/UrlAutoLinkExtension.php
+++ b/src/Ciconia/Extension/Gfm/UrlAutoLinkExtension.php
@@ -29,7 +29,22 @@ public function register(Markdown $markdown)
      */
     public function processStandardUrl(Text $text)
     {
-        $text->replace('{(?<!]\(|"|<|>|\[)((?:https?|ftp)://[^\'">\s]+)(?!>|<|\"|\])}', '<\1>');
+        $hashes = array();
+
+        // escape <code>
+        $text->replace('{<code>.*?</code>}m', function (Text $w) use (&$hashes) {
+            $md5 = md5($w);
+            $hashes[$md5] = $w;
+
+            return "{gfm-extraction-$md5}";
+        });
+
+        $text->replace('{(?<!]\(|"|<|\[)((?:https?|ftp)://[^\'">\s]+)(?!>|\"|\])}', '<\1>');
+
+        /** @noinspection PhpUnusedParameterInspection */
+        $text->replace('/\{gfm-extraction-([0-9a-f]{32})\}/m', function (Text $w, Text $md5) use (&$hashes) {
+            return $hashes[(string)$md5];
+        });
     }
 
     /**
diff --git a/test/Ciconia/Resources/gfm/link-in-code-span.md b/test/Ciconia/Resources/gfm/link-in-code-span.md
index 39f016b..25f772b 100644
--- a/test/Ciconia/Resources/gfm/link-in-code-span.md
+++ b/test/Ciconia/Resources/gfm/link-in-code-span.md
@@ -1 +1,3 @@
-Look at: `http://someurl.com` and text.
\ No newline at end of file
+Look at: `http://someurl.com` and text.
+
+Look at: `url: http://someurl.com` and text.
\ No newline at end of file
diff --git a/test/Ciconia/Resources/gfm/link-in-code-span.out b/test/Ciconia/Resources/gfm/link-in-code-span.out
index b65a19f..091784e 100644
--- a/test/Ciconia/Resources/gfm/link-in-code-span.out
+++ b/test/Ciconia/Resources/gfm/link-in-code-span.out
@@ -1 +1,3 @@
-<p>Look at: <code>http://someurl.com</code> and text.</p>
\ No newline at end of file
+<p>Look at: <code>http://someurl.com</code> and text.</p>
+
+<p>Look at: <code>url: http://someurl.com</code> and text.</p>
\ No newline at end of file
diff --git a/test/Ciconia/Resources/gfm/link-in-codeblock.md b/test/Ciconia/Resources/gfm/link-in-codeblock.md
new file mode 100644
index 0000000..139e92d
--- /dev/null
+++ b/test/Ciconia/Resources/gfm/link-in-codeblock.md
@@ -0,0 +1,3 @@
+``` php
+$validator->validate('http://www.example.com/');
+```
\ No newline at end of file
diff --git a/test/Ciconia/Resources/gfm/link-in-codeblock.out b/test/Ciconia/Resources/gfm/link-in-codeblock.out
new file mode 100644
index 0000000..c784e37
--- /dev/null
+++ b/test/Ciconia/Resources/gfm/link-in-codeblock.out
@@ -0,0 +1,2 @@
+<pre class="prettyprint lang-php"><code>$validator-&gt;validate('http://www.example.com/');
+</code></pre>
\ No newline at end of file