Add support for -moz-calc

Author: raxbg

lib/Sabberworm/CSS/Parser.php

@@ -436,7 +436,7 @@ private function parsePrimitiveValue() {
 			$oValue = $this->parseColorValue();
 		} else if ($this->comes('url', true)) {
 			$oValue = $this->parseURLValue();
-		} else if ($this->comes('calc', true) || $this->comes('-webkit-calc', true)) {
+		} else if ($this->comes('calc', true) || $this->comes('-webkit-calc', true) || $this->comes('-moz-calc', true)) {
 			$oValue = $this->parseCalcValue();
 		} else if ($this->comes("'") || $this->comes('"')) {
 			$oValue = $this->parseStringValue();

tests/Sabberworm/CSS/ParserTest.php

@@ -390,7 +390,7 @@ function testUrlInFile() {
 	function testCalcInFile() {
 		$oDoc = $this->parsedStructureForFile('calc', Settings::create()->withMultibyteSupport(true));
 		$sExpected = 'div {width: calc(100% / 4);}
-div {height: -webkit-calc(9 / 16 * 100%) !important;}';
+div {height: -webkit-calc(9 / 16 * 100%) !important;width: -moz-calc(50px - 50%);}';
 		$this->assertSame($sExpected, $oDoc->render());
 	}
 

tests/files/calc.css

@@ -1,4 +1,5 @@
 div { width: calc(100% / 4); }
 div {
 	height: -webkit-calc(9/16 * 100%)!important;
+	width: -moz-calc(50px-50%);
 }