refactor: extract header, table, tr logic to helper

src/BlockElementParser.php

@@ -78,23 +78,20 @@ protected function isBlock()
 
     protected function atx()
     {
-        if (isset($this->trimmedLine[0]) && $this->trimmedLine[0] === '#') {
+        if (\substr($this->trimmedLine, 0, 1) === '#') {
             $level = \strlen($this->trimmedLine) - \strlen(\ltrim($this->trimmedLine, '#'));
+            $head  = $this->h($level, $this->trimmedLine);
 
-            if ($level < 7) {
-                $this->markup .= "\n<h{$level}>" . \ltrim(\ltrim($this->trimmedLine, '# ')) . "</h{$level}>";
+            $this->markup .= $head;
 
-                return \true;
-            }
+            return (bool) $head;
         }
     }
 
     protected function setext()
     {
         if (\preg_match(static::RE_MD_SETEXT, $this->nextLine)) {
-            $level = \trim($this->nextLine, '- ') === '' ? 2 : 1;
-
-            $this->markup .= "\n<h{$level}>{$this->trimmedLine}</h{$level}>";
+            $this->markup .= $this->h($this->nextLine, $this->trimmedLine);
 
             $this->pointer++;
 
@@ -108,11 +105,7 @@ protected function code()
         $codeBlock = \preg_match(static::RE_MD_CODE, $this->line, $codeMatch);
 
         if ($codeBlock || (!$this->inList && !$this->inQuote && $isShifted)) {
-            $lang = isset($codeMatch[1])
-                ? ' class="language-' . $codeMatch[1] . '"'
-                : '';
-
-            $this->markup .= "\n<pre><code{$lang}>";
+            $this->markup .= $this->codeStart($codeMatch);
 
             if (!$codeBlock) {
                 $this->markup .= $this->escape(\substr($this->line, $this->indentLen));
@@ -136,25 +129,22 @@ private function codeInternal($codeBlock)
             if (($codeBlock && \substr(\ltrim($this->line), 0, 3) !== '```')
                 || \strpos($this->line, $this->indentStr) === 0
             ) {
-                $this->markup .= "\n"; // @todo: donot use \n for first line
-                $this->markup .= $codeBlock ? $this->line : \substr($this->line, $this->indentLen);
+                $this->markup .= $this->codeLine($this->line, $codeBlock, $this->indentLen);
 
                 $this->pointer++;
-            } else {
-                break;
+
+                continue;
             }
+
+            break;
         }
     }
 
     protected function rule()
     {
-        if ($this->trimmedPrevLine === ''
-            && \preg_match(static::RE_MD_RULE, $this->trimmedLine)
-        ) {
-            $this->markup .= "\n<hr />";
+        $this->markup .= $hr = $this->hr($this->trimmedPrevLine, $this->trimmedLine);
 
-            return \true;
-        }
+        return (bool) $hr;
     }
 
     protected function listt()
@@ -166,8 +156,9 @@ protected function listt()
 
             if (!$this->inList) {
                 $this->stackList[] = "</$wrapper>";
+
                 $this->markup .= "\n<$wrapper>\n";
-                $this->inList      = \true;
+                $this->inList  = \true;
 
                 $this->listLevel++;
             }
@@ -222,18 +213,7 @@ protected function table()
             return $this->tableInternal($headerCount);
         }
 
-        $this->markup .= "<tr>\n";
-
-        foreach (\explode('|', \trim($this->trimmedLine, '|')) as $i => $col) {
-            if ($i > $headerCount) {
-                break;
-            }
-
-            $col           = \trim($col);
-            $this->markup .= "<td>{$col}</td>\n";
-        }
-
-        $this->markup .= "</tr>\n";
+        $this->markup .= $this->tableRow($this->trimmedLine, $headerCount);
 
         if (empty($this->trimmedNextLine)
             || !\substr_count(\trim($this->trimmedNextLine, '|'), '|')
@@ -254,14 +234,7 @@ private function tableInternal($headerCount)
             $this->pointer++;
 
             $this->inTable = \true;
-            $this->markup .= "<table>\n<thead>\n<tr>\n";
-            $this->trimmedLine = \trim($this->trimmedLine, '|');
-
-            foreach (\explode('|', $this->trimmedLine) as $hdr) {
-                $this->markup .= '<th>' . \trim($hdr) . "</th>\n";
-            }
-
-            $this->markup .= "</tr>\n</thead>\n<tbody>\n";
+            $this->markup .= $this->tableStart($this->trimmedLine);
 
             return \true;
         }

src/HtmlHelper.php

@@ -17,4 +17,72 @@ public function escape($input)
     {
         return \htmlspecialchars($input);
     }
+
+    public function h($level, $line)
+    {
+        if (\is_string($level)) {
+            $level = \trim($level, '- ') === '' ? 2 : 1;
+        }
+
+        if ($level < 7) {
+            return "\n<h{$level}>" . \ltrim(\ltrim($line, '# ')) . "</h{$level}>";
+        }
+
+        return '';
+    }
+
+    public function hr($prevLine, $line)
+    {
+        if ($prevLine === '' && \preg_match(BlockElementParser::RE_MD_RULE, $line)) {
+            return "\n<hr />";
+        }
+    }
+
+    public function codeStart($lang)
+    {
+        $lang = isset($lang[1])
+            ? ' class="language-' . $lang[1] . '"'
+            : '';
+
+        return "\n<pre><code{$lang}>";
+    }
+
+    public function codeLine($line, $isBlock, $indentLen = 4)
+    {
+        $code  = "\n"; // @todo: donot use \n for first line
+        $code .= $isBlock ? $line : \substr($line, $indentLen);
+
+        return $code;
+    }
+
+    public function tableStart($line, $delim = '|')
+    {
+        $table = "<table>\n<thead>\n<tr>\n";
+
+        foreach (\explode($delim, \trim($line, $delim)) as $hdr) {
+            $table .= '<th>' . \trim($hdr) . "</th>\n";
+        }
+
+        $table .= "</tr>\n</thead>\n<tbody>\n";
+
+        return $table;
+    }
+
+    public function tableRow($line, $colCount, $delim = '|')
+    {
+        $row = "<tr>\n";
+
+        foreach (\explode($delim, \trim($line, $delim)) as $i => $col) {
+            if ($i > $colCount) {
+                break;
+            }
+
+            $col  = \trim($col);
+            $row .= "<td>{$col}</td>\n";
+        }
+
+        $row .= "</tr>\n";
+
+        return $row;
+    }
 }