From 394c448cc5cc36ad88ca223f4e54adbfacf9c23a Mon Sep 17 00:00:00 2001
From: Frederic Massart <fred@moodle.com>
Date: Mon, 1 Aug 2016 19:17:17 +0800
Subject: [PATCH] Support for inserting an item in a CSSList

---
 lib/Sabberworm/CSS/CSSList/CSSList.php        | 14 ++++++++
 tests/Sabberworm/CSS/CSSList/DocumentTest.php | 33 +++++++++++++++++++
 2 files changed, 47 insertions(+)

diff --git a/lib/Sabberworm/CSS/CSSList/CSSList.php b/lib/Sabberworm/CSS/CSSList/CSSList.php
index bc90460b..f9986eb3 100644
--- a/lib/Sabberworm/CSS/CSSList/CSSList.php
+++ b/lib/Sabberworm/CSS/CSSList/CSSList.php
@@ -35,6 +35,20 @@ public function append($oItem) {
 		$this->aContents[] = $oItem;
 	}
 
+	/**
+	 * Insert an item before its sibling.
+	 *
+	 * @param mixed $oItem The item.
+	 * @param mixed $oSibling The sibling.
+	 */
+	public function insert($oItem, $oSibling) {
+		$iIndex = array_search($oSibling, $this->aContents);
+		if ($iIndex === false) {
+			return $this->append($oItem);
+		}
+		array_splice($this->aContents, $iIndex, 0, array($oItem));
+	}
+
 	/**
 	 * Removes an item from the CSS list.
 	 * @param RuleSet|Import|Charset|CSSList $oItemToRemove May be a RuleSet (most likely a DeclarationBlock), a Import, a Charset or another CSSList (most likely a MediaQuery)
diff --git a/tests/Sabberworm/CSS/CSSList/DocumentTest.php b/tests/Sabberworm/CSS/CSSList/DocumentTest.php
index 00395809..ea388f9f 100644
--- a/tests/Sabberworm/CSS/CSSList/DocumentTest.php
+++ b/tests/Sabberworm/CSS/CSSList/DocumentTest.php
@@ -2,6 +2,7 @@
 
 namespace Sabberworm\CSS\CSSList;
 
+use Sabberworm\CSS\RuleSet\DeclarationBlock;
 use Sabberworm\CSS\Parser;
 
 class DocumentTest extends \PHPUnit_Framework_TestCase {
@@ -23,4 +24,36 @@ public function testOverrideContents() {
 		$this->assertCount(2, $aFinalContents);
 	}
 
+	public function testInsertContent() {
+		$sCss = '.thing { left: 10px; } .stuff { margin: 1px; } ';
+		$oParser = new Parser($sCss);
+		$oDoc = $oParser->parse();
+		$aContents = $oDoc->getContents();
+		$this->assertCount(2, $aContents);
+
+		$oThing = $aContents[0];
+		$oStuff = $aContents[1];
+
+		$oFirst = new DeclarationBlock();
+		$oFirst->setSelectors('.first');
+		$oBetween = new DeclarationBlock();
+		$oBetween->setSelectors('.between');
+		$oOrphan = new DeclarationBlock();
+		$oOrphan->setSelectors('.forever-alone');
+		$oNotFound = new DeclarationBlock();
+		$oNotFound->setSelectors('.not-found');
+
+		$oDoc->insert($oFirst, $oThing);
+		$oDoc->insert($oBetween, $oStuff);
+		$oDoc->insert($oOrphan, $oNotFound);
+
+		$aContents = $oDoc->getContents();
+		$this->assertCount(5, $aContents);
+		$this->assertSame($oFirst, $aContents[0]);
+		$this->assertSame($oThing, $aContents[1]);
+		$this->assertSame($oBetween, $aContents[2]);
+		$this->assertSame($oStuff, $aContents[3]);
+		$this->assertSame($oOrphan, $aContents[4]);
+	}
+
 }