From db1d0a4999a1b8370e844d1659cf368a90e9c9e9 Mon Sep 17 00:00:00 2001
From: Aidan Woods <aidantwoods@gmail.com>
Date: Sun, 20 Jan 2019 02:36:55 +0000
Subject: [PATCH] Implement Strikethrough

---
 src/Components/Inlines/Strikethrough.php | 67 ++++++++++++++++++++++++
 src/Parsedown.php                        | 21 --------
 2 files changed, 67 insertions(+), 21 deletions(-)
 create mode 100644 src/Components/Inlines/Strikethrough.php

diff --git a/src/Components/Inlines/Strikethrough.php b/src/Components/Inlines/Strikethrough.php
new file mode 100644
index 0000000..93ac2aa
--- /dev/null
+++ b/src/Components/Inlines/Strikethrough.php
@@ -0,0 +1,67 @@
+<?php
+
+namespace Erusev\Parsedown\Components\Inlines;
+
+use Erusev\Parsedown\AST\Handler;
+use Erusev\Parsedown\AST\StateRenderable;
+use Erusev\Parsedown\Components\Inline;
+use Erusev\Parsedown\Html\Renderables\Element;
+use Erusev\Parsedown\Html\Renderables\Text;
+use Erusev\Parsedown\Parsedown;
+use Erusev\Parsedown\Parsing\Excerpt;
+use Erusev\Parsedown\State;
+
+final class Strikethrough implements Inline
+{
+    use WidthTrait, DefaultBeginPosition;
+
+    /** @var string */
+    private $text;
+
+    /**
+     * @param string $text
+     * @param int $width
+     */
+    public function __construct($text, $width)
+    {
+        $this->text = $text;
+        $this->width = $width;
+    }
+
+    /**
+     * @param Excerpt $Excerpt
+     * @param State $State
+     * @return static|null
+     */
+    public static function build(Excerpt $Excerpt, State $State)
+    {
+        $text = $Excerpt->text();
+
+        if (\strlen($text) < 2) {
+            return null;
+        }
+
+        if ($text[1] === '~' and \preg_match('/^~~(?=\S)(.+?)(?<=\S)~~/', $text, $matches)) {
+            return new self($matches[1], \strlen($matches[0]));
+        }
+
+        return null;
+    }
+
+    /**
+     * @return Handler<Element>
+     */
+    public function stateRenderable(Parsedown $Parsedown)
+    {
+        return new Handler(
+            /** @return Element */
+            function (State $State) use ($Parsedown) {
+                return new Element(
+                    'del',
+                    [],
+                    $State->applyTo($Parsedown->lineElements($this->text))
+                );
+            }
+        );
+    }
+}
diff --git a/src/Parsedown.php b/src/Parsedown.php
index b91b5bf..b731ae3 100644
--- a/src/Parsedown.php
+++ b/src/Parsedown.php
@@ -411,27 +411,6 @@ class Parsedown
         return $Elements;
     }
 
-    protected function inlineStrikethrough($Excerpt)
-    {
-        if (! isset($Excerpt['text'][1])) {
-            return;
-        }
-
-        if ($Excerpt['text'][1] === '~' and \preg_match('/^~~(?=\S)(.+?)(?<=\S)~~/', $Excerpt['text'], $matches)) {
-            return [
-                'extent' => \strlen($matches[0]),
-                'element' => [
-                    'name' => 'del',
-                    'handler' => [
-                        'function' => 'lineElements',
-                        'argument' => $matches[1],
-                        'destination' => 'elements',
-                    ]
-                ],
-            ];
-        }
-    }
-
     protected function inlineUrl($Excerpt)
     {
         if ($this->urlsLinked !== true or ! isset($Excerpt['text'][2]) or $Excerpt['text'][2] !== '/') {