Add hard and soft breaks

src/Components/Inlines/HardBreak.php

@@ -0,0 +1,91 @@
+<?php
+
+namespace Erusev\Parsedown\Components\Inlines;
+
+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 HardBreak implements Inline
+{
+    use WidthTrait;
+
+    /** @var int */
+    private $position;
+
+    /**
+     * @param int $width
+     * @param int $position
+     */
+    public function __construct($width, $position)
+    {
+        $this->width = $width;
+        $this->position = $position;
+    }
+
+    /**
+     * @param Excerpt $Excerpt
+     * @param State $State
+     * @return static|null
+     */
+    public static function build(Excerpt $Excerpt, State $State)
+    {
+        $context = $Excerpt->context();
+        $offset = $Excerpt->offset();
+
+        if ($offset < 1) {
+            return null;
+        }
+
+        if (\substr($context, $offset -1, 1) === '\\') {
+            $trimTrailingWhitespace = \rtrim(\substr($context, 0, $offset -1));
+            $contentLen = \strlen($trimTrailingWhitespace);
+
+            return new self($offset - $contentLen, $contentLen);
+        }
+
+        if ($offset < 2) {
+            return null;
+        }
+
+        if (\substr($context, $offset -2, 2) === '  ') {
+            $trimTrailingWhitespace = \rtrim(\substr($context, 0, $offset));
+            $contentLen = \strlen($trimTrailingWhitespace);
+
+            return new self($offset - $contentLen, $contentLen);
+        }
+
+        return null;
+    }
+
+    /**
+     * Return an integer to declare that the inline should be treated as if it
+     * started from that position in the excerpt given to static::build.
+     * Return null to use the excerpt offset value.
+     * @return int|null
+     * */
+    public function modifyStartPositionTo()
+    {
+        return $this->position;
+    }
+
+    /**
+     * @return Element
+     */
+    public function stateRenderable(Parsedown $_)
+    {
+        return Element::selfClosing('br', []);
+    }
+
+    /**
+     * @return Text
+     */
+    public function bestPlaintext()
+    {
+        return new Text("\n");
+    }
+}

src/Components/Inlines/PlainText.php

@@ -2,11 +2,8 @@
 
 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\Container;
-use Erusev\Parsedown\Html\Renderables\Element;
 use Erusev\Parsedown\Html\Renderables\Text;
 use Erusev\Parsedown\Parsedown;
 use Erusev\Parsedown\Parsing\Excerpt;
@@ -45,34 +42,11 @@ final class PlainText implements Inline
     }
 
     /**
-     * @return Handler<Container>
+     * @return Text
      */
     public function stateRenderable(Parsedown $_)
     {
-        return new Handler(
-            /** @return Container */
-            function (State $_) {
-                $Renderables = [];
-                $text = $this->text;
-
-                $text = \preg_replace('/(?<![ \t])[ ]\n/', "$1\n", $text);
-
-                while (\preg_match('/(?:[ ]*+[\\\]|[ ]{2,}+)\n/', $text, $matches, \PREG_OFFSET_CAPTURE)) {
-                    $offset = \intval($matches[0][1]);
-                    $before = \substr($text, 0, $offset);
-                    $after = \substr($text, $offset + \strlen($matches[0][0]));
-                    $Renderables[] = new Text($before);
-                    $Renderables[] = Element::selfClosing('br', []);
-                    $Renderables[] = new Text("\n");
-
-                    $text = $after;
-                }
-
-                $Renderables[] = new Text($text);
-
-                return new Container($Renderables);
-            }
-        );
+        return new Text($this->text);
     }
 
     /**

src/Components/Inlines/SoftBreak.php

@@ -0,0 +1,76 @@
+<?php
+
+namespace Erusev\Parsedown\Components\Inlines;
+
+use Erusev\Parsedown\AST\StateRenderable;
+use Erusev\Parsedown\Components\Inline;
+use Erusev\Parsedown\Html\Renderables\Text;
+use Erusev\Parsedown\Parsedown;
+use Erusev\Parsedown\Parsing\Excerpt;
+use Erusev\Parsedown\State;
+
+final class SoftBreak implements Inline
+{
+    use WidthTrait;
+
+    /** @var int */
+    private $position;
+
+    /**
+     * @param int $width
+     * @param int $position
+     */
+    public function __construct($width, $position)
+    {
+        $this->width = $width;
+        $this->position = $position;
+    }
+
+    /**
+     * @param Excerpt $Excerpt
+     * @param State $State
+     * @return static|null
+     */
+    public static function build(Excerpt $Excerpt, State $State)
+    {
+        $context = $Excerpt->context();
+        $offset = $Excerpt->offset();
+
+        $trimTrailingWhitespaceBefore = \rtrim(\substr($context, 0, $offset));
+        $trimLeadingWhitespaceAfter = \ltrim(\substr($context, $offset + 1));
+        $contentLenBefore = \strlen($trimTrailingWhitespaceBefore);
+        $contentLenAfter = \strlen($trimLeadingWhitespaceAfter);
+
+        $originalLen = \strlen($context);
+        $afterWidth = $originalLen - $offset - $contentLenAfter;
+
+        return new self($offset + $afterWidth - $contentLenBefore, $contentLenBefore);
+    }
+
+    /**
+     * Return an integer to declare that the inline should be treated as if it
+     * started from that position in the excerpt given to static::build.
+     * Return null to use the excerpt offset value.
+     * @return int|null
+     * */
+    public function modifyStartPositionTo()
+    {
+        return $this->position;
+    }
+
+    /**
+     * @return Text
+     */
+    public function stateRenderable(Parsedown $_)
+    {
+        return new Text("\n");
+    }
+
+    /**
+     * @return Text
+     */
+    public function bestPlaintext()
+    {
+        return new Text("\n");
+    }
+}