[Experimental/HtmlAttributes] Adds HTML attributes support

* Emmet style HTML attributes inside a curly braces
* Related Ticket is #16

See test/Ciconia/Resources/html/* to get the usage

src/Ciconia/Extension/Html/AttributesExtension.php

@@ -0,0 +1,110 @@
+<?php
+
+namespace Ciconia\Extension\Html;
+
+use Ciconia\Common\Tag;
+use Ciconia\Common\Text;
+use Ciconia\Extension\ExtensionInterface;
+use Ciconia\Markdown;
+
+class AttributesExtension implements ExtensionInterface
+{
+
+    /**
+     * {@inheritdoc}
+     */
+    public function register(Markdown $markdown)
+    {
+        $markdown->on('tag', array($this, 'processBlockTags'));
+    }
+
+    /**
+     * Parse emmet style attributes
+     *
+     * @param Tag $tag
+     */
+    public function processBlockTags(Tag $tag)
+    {
+        if ($tag->isInline()) {
+            return;
+        }
+
+        $text = null;
+        $tag->getText()->replace('/(^{([^:\(\)]+)}[ \t]*\n?|(?:[ \t]*|\n?){([^:\(\)]+)}\n*$)/', function (Text $w) use (&$text) {
+            $text = $w->trim()->trim('{}');
+
+            return '';
+        });
+
+        if ($text) {
+            $tag->setAttributes($this->parseAttributes($text));
+        }
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function getName()
+    {
+        return 'htmlAttributes';
+    }
+
+    /**
+     * @param Text $text
+     *
+     * @return array
+     */
+    protected function parseAttributes(Text $text)
+    {
+        $patterns = [
+            'id'    => '/^#([a-zA-Z0-9_-]+)/',
+            'class' => '/^\.([a-zA-Z0-9_-]+)/',
+            'attr'  => '/^\[([^\]]+)\]/',
+            'ident' => '/^(.)/'
+        ];
+
+        $tokens = [
+            'id' => [], 'class' => [], 'attr' => [], 'ident' => []
+        ];
+
+        while (!$text->isEmpty()) {
+            foreach ($patterns as $name => $pattern) {
+                if ($text->match($pattern, $matches)) {
+                    $tokens[$name][] = $matches[1];
+                    $text->setString(
+                        substr($text->getString(), strlen($matches[0]))
+                    );
+
+                    break;
+                }
+            }
+        }
+
+        $attributes = array();
+
+        if (count($tokens['id'])) {
+            $attributes['id'] = array_pop($tokens['id']);
+        }
+
+        if (count($tokens['class'])) {
+            $attributes['class'] = implode(' ', $tokens['class']);
+        }
+
+        if (count($tokens['attr'])) {
+            foreach ($tokens['attr'] as $raw) {
+                $items = explode(' ', $raw);
+                foreach ($items as $item) {
+                    if (strpos($item, '=') !== false) {
+                        list ($key, $value) = explode('=', $item);
+                        $attributes[$key] = trim($value, '"');
+                    } else {
+                        $attributes[$item] = $item;
+                    }
+                }
+            }
+        }
+
+        return $attributes;
+    }
+
+}

test/Ciconia/Extension/HtmlExtensionsTest.php

@@ -0,0 +1,68 @@
+<?php
+
+use Ciconia\Ciconia;
+use Ciconia\Renderer\XhtmlRenderer;
+use Symfony\Component\Finder\Finder;
+
+/**
+ * Tests Ciconia\Extensions\Html\*
+ *
+ * @group Html
+ *
+ * @author Kazuyuki Hayashi <[email protected]>
+ */
+class HtmlExtensionsTest extends PHPUnit_Framework_TestCase
+{
+
+    /**
+     * @dataProvider htmlProvider
+     */
+    public function testHtmlPatterns($name, $textile, $expected)
+    {
+        $ciconia = new Ciconia(new XhtmlRenderer());
+        $ciconia->addExtensions([
+            new \Ciconia\Extension\Html\AttributesExtension()
+        ]);
+
+        $expected = str_replace("\r\n", "\n", $expected);
+        $expected = str_replace("\r", "\n", $expected);
+        $html     = $ciconia->render($textile);
+
+        $this->assertEquals($expected, $html, sprintf('%s failed', $name));
+    }
+
+    /**
+     * @return array
+     */
+    public function htmlProvider()
+    {
+        $finder = Finder::create()
+            ->in([__DIR__.'/../Resources/html', __DIR__.'/../Resources/core'])
+            ->files()
+            ->name('*.md')
+            ->notName('link-automatic-email.md');
+
+        return $this->processPatterns($finder);
+    }
+
+    /**
+     * @param Finder|\Symfony\Component\Finder\SplFileInfo[] $finder
+     *
+     * @return array
+     */
+    protected function processPatterns(Finder $finder)
+    {
+        $patterns = [];
+
+        foreach ($finder as $file) {
+            $name       = preg_replace('/\.(md|out)$/', '', $file->getFilename());
+            $expected   = trim(file_get_contents(preg_replace('/\.md$/', '.out', $file->getPathname())));
+            $expected   = str_replace("\r\n", "\n", $expected);
+            $expected   = str_replace("\r", "\n", $expected);
+            $patterns[] = [$name, $file->getContents(), $expected];
+        }
+
+        return $patterns;
+    }
+
+} 

test/Ciconia/Resources/html/html-attributes-headers.md

@@ -0,0 +1,11 @@
+Header {#id.class1.class2[role="main" align=right]}
+======
+
+### Header {#id}
+
+### Header {.class}
+
+{[aria-hidden=true]} Header
+-----------
+
+###### {[aria-hidden=true]} Header

test/Ciconia/Resources/html/html-attributes-headers.out

@@ -0,0 +1,9 @@
+<h1 id="id" class="class1 class2" role="main" align="right">Header</h1>
+
+<h3 id="id">Header</h3>
+
+<h3 class="class">Header</h3>
+
+<h2 aria-hidden="true">Header</h2>
+
+<h6 aria-hidden="true">Header</h6>

test/Ciconia/Resources/html/html-attributes-paragraph.md

@@ -0,0 +1,23 @@
+{#id} Lorem ipsum dolor sit amet
+
+{#id} Lorem ipsum dolor sit amet,
+consectetur adipisicing elit.
+Qui dicta minus molestiae vel
+beatae natus eveniet ratione temporibus
+
+{#id}
+Lorem ipsum dolor sit amet,
+consectetur adipisicing elit.
+Qui dicta minus molestiae vel
+beatae natus eveniet ratione temporibus
+
+Lorem ipsum dolor sit amet,
+consectetur adipisicing elit.
+Qui dicta minus molestiae vel
+beatae natus eveniet ratione temporibus {#id}
+
+Lorem ipsum dolor sit amet,
+consectetur adipisicing elit.
+Qui dicta minus molestiae vel
+beatae natus eveniet ratione temporibus
+{#id}

test/Ciconia/Resources/html/html-attributes-paragraph.out

@@ -0,0 +1,21 @@
+<p id="id">Lorem ipsum dolor sit amet</p>
+
+<p id="id">Lorem ipsum dolor sit amet,
+consectetur adipisicing elit.
+Qui dicta minus molestiae vel
+beatae natus eveniet ratione temporibus</p>
+
+<p id="id">Lorem ipsum dolor sit amet,
+consectetur adipisicing elit.
+Qui dicta minus molestiae vel
+beatae natus eveniet ratione temporibus</p>
+
+<p id="id">Lorem ipsum dolor sit amet,
+consectetur adipisicing elit.
+Qui dicta minus molestiae vel
+beatae natus eveniet ratione temporibus</p>
+
+<p id="id">Lorem ipsum dolor sit amet,
+consectetur adipisicing elit.
+Qui dicta minus molestiae vel
+beatae natus eveniet ratione temporibus</p>