Extend output formatting with additional delimiter options

Allow content to be added before/after at-rule blocks.
Also allow content to be added before a declaration block, after its selectors, and then after the declaration block.

Author: westonruter

lib/Sabberworm/CSS/CSSList/AtRuleBlockList.php

@@ -35,9 +35,11 @@ public function render(\Sabberworm\CSS\OutputFormat $oOutputFormat) {
 		if($sArgs) {
 			$sArgs = ' ' . $sArgs;
 		}
-		$sResult = "@{$this->sType}$sArgs{$oOutputFormat->spaceBeforeOpeningBrace()}{";
+		$sResult  = $oOutputFormat->sBeforeAtRuleBlock;
+		$sResult .= "@{$this->sType}$sArgs{$oOutputFormat->spaceBeforeOpeningBrace()}{";
 		$sResult .= parent::render($oOutputFormat);
 		$sResult .= '}';
+		$sResult .= $oOutputFormat->sAfterAtRuleBlock;
 		return $sResult;
 	}
 

lib/Sabberworm/CSS/OutputFormat.php

@@ -35,6 +35,10 @@ class OutputFormat {
 	public $sSpaceAfterBlocks = '';
 	public $sSpaceBetweenBlocks = "\n";
 
+	// Content injected in and around @-rule blocks.
+	public $sBeforeAtRuleBlock = '';
+	public $sAfterAtRuleBlock = '';
+
 	// This is what’s printed before and after the comma if a declaration block contains multiple selectors.
 	public $sSpaceBeforeSelectorSeparator = '';
 	public $sSpaceAfterSelectorSeparator = ' ';
@@ -43,7 +47,12 @@ class OutputFormat {
 	public $sSpaceAfterListArgumentSeparator = '';
 
 	public $sSpaceBeforeOpeningBrace = ' ';
-	
+
+	// Content injected in and around declaration blocks.
+	public $sBeforeDeclarationBlock = '';
+	public $sAfterDeclarationBlockSelectors = '';
+	public $sAfterDeclarationBlock = '';
+
 	/**
 	* Indentation
 	*/

lib/Sabberworm/CSS/RuleSet/DeclarationBlock.php

@@ -610,9 +610,13 @@ public function render(\Sabberworm\CSS\OutputFormat $oOutputFormat) {
 			// If all the selectors have been removed, this declaration block becomes invalid
 			throw new OutputException("Attempt to print declaration block with missing selector", $this->iLineNo);
 		}
-		$sResult = $oOutputFormat->implode($oOutputFormat->spaceBeforeSelectorSeparator() . ',' . $oOutputFormat->spaceAfterSelectorSeparator(), $this->aSelectors) . $oOutputFormat->spaceBeforeOpeningBrace() . '{';
+		$sResult = $oOutputFormat->sBeforeDeclarationBlock;
+		$sResult .= $oOutputFormat->implode($oOutputFormat->spaceBeforeSelectorSeparator() . ',' . $oOutputFormat->spaceAfterSelectorSeparator(), $this->aSelectors);
+		$sResult .= $oOutputFormat->sAfterDeclarationBlockSelectors;
+		$sResult .= $oOutputFormat->spaceBeforeOpeningBrace() . '{';
 		$sResult .= parent::render($oOutputFormat);
 		$sResult .= '}';
+		$sResult .= $oOutputFormat->sAfterDeclarationBlock;
 		return $sResult;
 	}