Initial commit

content/inc/Parsing/Handler/Nest.php

@@ -0,0 +1,82 @@
+<?php
+
+namespace dokuwiki\Parsing\Handler;
+
+/**
+ * Generic call writer class to handle nesting of rendering instructions
+ * within a render instruction. Also see nest() method of renderer base class
+ *
+ * @author    Chris Smith <chris@jalakai.co.uk>
+ */
+class Nest extends AbstractRewriter
+{
+    protected $closingInstruction;
+
+    /**
+     * @inheritdoc
+     *
+     * @param  CallWriterInterface $CallWriter     the parser's current call writer, i.e. the one above us in the chain
+     * @param  string     $close          closing instruction name, this is required to properly terminate the
+     *                                    syntax mode if the document ends without a closing pattern
+     */
+    public function __construct(CallWriterInterface $CallWriter, $close = "nest_close")
+    {
+        parent::__construct($CallWriter);
+        $this->closingInstruction = $close;
+    }
+
+    /** @inheritdoc */
+    public function writeCall($call)
+    {
+        $this->calls[] = $call;
+    }
+
+    /** @inheritdoc */
+    public function writeCalls($calls)
+    {
+        $this->calls = array_merge($this->calls, $calls);
+    }
+
+    /** @inheritdoc */
+    public function finalise()
+    {
+        $last_call = end($this->calls);
+        $this->writeCall(array($this->closingInstruction,array(), $last_call[2]));
+
+        $this->process();
+        $this->callWriter->finalise();
+        unset($this->callWriter);
+    }
+
+    /** @inheritdoc */
+    public function process()
+    {
+        // merge consecutive cdata
+        $unmerged_calls = $this->calls;
+        $this->calls = array();
+
+        foreach ($unmerged_calls as $call) $this->addCall($call);
+
+        $first_call = reset($this->calls);
+        $this->callWriter->writeCall(array("nest", array($this->calls), $first_call[2]));
+
+        return $this->callWriter;
+    }
+
+    /**
+     * @param array $call
+     */
+    protected function addCall($call)
+    {
+        $key = count($this->calls);
+        if ($key and ($call[0] == 'cdata') and ($this->calls[$key-1][0] == 'cdata')) {
+            $this->calls[$key-1][1][0] .= $call[1][0];
+        } elseif ($call[0] == 'eol') {
+            // do nothing (eol shouldn't be allowed, to counter preformatted fix in #1652 & #1699)
+        } else {
+            $this->calls[] = $call;
+        }
+    }
+
+
+}