TOC Depth filter function added

Add options to TOC to only show selected depth of titles ; ie pass 1,3
arguments to only show titles depth 1 to titles depth 3
Plus now you can have two+ TOC on your document, each different

src/PhpWord/Section.php

@@ -304,11 +304,13 @@ class Section
      *
      * @param mixed $styleFont
      * @param mixed $styleTOC
+     * @param int $minDepth
+     * @param int $maxDepth
      * @return \PhpOffice\PhpWord\TOC
      */
-    public function addTOC($styleFont = null, $styleTOC = null)
+    public function addTOC($styleFont = null, $styleTOC = null, $minDepth = 1, $maxDepth = 9)
     {
-        $toc = new TOC($styleFont, $styleTOC);
+        $toc = new TOC($styleFont, $styleTOC, $minDepth, $maxDepth);
         $this->_elementCollection[] = $toc;
         return $toc;
     }

src/PhpWord/TOC.php

@@ -67,6 +67,19 @@ class TOC
      */
     private static $_bookmarkId = 0;
 
+	/**
+	 * Min title depth to show
+	 *
+	 * @var int
+	 */
+	private $_minDepth = 1;
+	
+	/**
+	 * Max title depth to show
+	 *
+	 * @var int
+	 */
+	private $_maxDepth = 9;
 
     /**
      * Create a new Table-of-Contents Element
@@ -74,7 +87,7 @@ class TOC
      * @param array $styleFont
      * @param array $styleTOC
      */
-    public function __construct($styleFont = null, $styleTOC = null)
+    public function __construct($styleFont = null, $styleTOC = null, $minDepth = 1, $maxDepth = 9)
     {
         self::$_styleTOC = new \PhpOffice\PhpWord\Style\TOC();
 
@@ -101,6 +114,9 @@ class TOC
                 self::$_styleFont = $styleFont;
             }
         }
+		
+		$this->_minDepth = $minDepth;
+		$this->_maxDepth = $maxDepth;
     }
 
     /**
@@ -131,9 +147,20 @@ class TOC
      *
      * @return array
      */
-    public static function getTitles()
+    public function getTitles()
     {
-        return self::$_titles;
+        $titles = self::$_titles;
+		foreach ($titles as $i=>$title) {
+			if ($this->_minDepth > $title['depth']) {
+				unset($titles[$i]);
+			}
+			if (($this->_maxDepth != 0) && ($this->_maxDepth < $title['depth'])) {
+				unset($titles[$i]);
+			}
+		}
+		$titles = array_merge(array(), $titles);
+		
+		return $titles;
     }
 
     /**
@@ -155,4 +182,22 @@ class TOC
     {
         return self::$_styleFont;
     }
+	
+	/**
+	 * Get Max Depth
+	 * 
+	 * @return int Max depth of titles
+	 */
+	public function getMaxDepth() {
+		return $this->_maxDepth;
+	}
+	
+	/**
+	 * Get Min Depth
+	 * 
+	 * @return int Min depth of titles
+	 */
+	public function getMinDepth() {
+		return $this->_minDepth;
+	}
 }

src/PhpWord/Writer/Word2007/Document.php

@@ -112,7 +112,7 @@ class Document extends Base
                     } elseif ($element instanceof Object) {
                         $this->_writeObject($xmlWriter, $element);
                     } elseif ($element instanceof TOC) {
-                        $this->_writeTOC($xmlWriter);
+                        $this->_writeTOC($xmlWriter, $element);
                     } elseif ($element instanceof Footnote) {
                         $this->_writeFootnoteReference($xmlWriter, $element);
                     }
@@ -417,16 +417,20 @@ class Document extends Base
      * Write TOC element
      *
      * @param PhpOffice\PhpWord\Shared\XMLWriter $xmlWriter
+     * @param PhpOffice\PhpWord\TOC $toc
      */
-    private function _writeTOC(XMLWriter $xmlWriter)
+    private function _writeTOC(XMLWriter $xmlWriter, TOC $toc)
     {
-        $titles = TOC::getTitles();
+        $titles = $toc->getTitles();
-        $styleFont = TOC::getStyleFont();
+        $styleFont = $toc->getStyleFont();
 
-        $styleTOC = TOC::getStyleTOC();
+        $styleTOC = $toc->getStyleTOC();
         $fIndent = $styleTOC->getIndent();
         $tabLeader = $styleTOC->getTabLeader();
         $tabPos = $styleTOC->getTabPos();
+		
+		$maxDepth = $toc->getMaxDepth();
+		$minDepth = $toc->getMinDepth();
 
         $isObject = ($styleFont instanceof Font) ? true : false;
 
@@ -479,7 +483,7 @@ class Document extends Base
                 $xmlWriter->startElement('w:r');
                 $xmlWriter->startElement('w:instrText');
                 $xmlWriter->writeAttribute('xml:space', 'preserve');
-                $xmlWriter->writeRaw('TOC \o "1-9" \h \z \u');
+                $xmlWriter->writeRaw('TOC \o "'.$minDepth.'-'.$maxDepth.'" \h \z \u');
                 $xmlWriter->endElement();
                 $xmlWriter->endElement();