compiler-jx/src/main/java/org/apache/royale/compiler/internal/driver/js/royale/JSCSSCompilationSession.java - royale-compiler - Git at Google

 /*
  *
  *  Licensed to the Apache Software Foundation (ASF) under one or more
  *  contributor license agreements.  See the NOTICE file distributed with
  *  this work for additional information regarding copyright ownership.
  *  The ASF licenses this file to You under the Apache License, Version 2.0
  *  (the "License"); you may not use this file except in compliance with
  *  the License.  You may obtain a copy of the License at
  *
  *      http://www.apache.org/licenses/LICENSE-2.0
  *
  *  Unless required by applicable law or agreed to in writing, software
  *  distributed under the License is distributed on an "AS IS" BASIS,
  *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  *  See the License for the specific language governing permissions and
  *  limitations under the License.
  *
  */
 package org.apache.royale.compiler.internal.driver.js.royale;

 import java.util.ArrayList;
 import java.util.Arrays;
 import java.util.Collections;
 import java.util.List;

 import org.apache.royale.compiler.constants.IASLanguageConstants;
 import org.apache.royale.compiler.css.ICSSDocument;
 import org.apache.royale.compiler.css.ICSSMediaQueryCondition;
 import org.apache.royale.compiler.css.ICSSProperty;
 import org.apache.royale.compiler.css.ICSSPropertyValue;
 import org.apache.royale.compiler.css.ICSSRule;
 import org.apache.royale.compiler.css.ICSSSelector;
 import org.apache.royale.compiler.css.ICSSSelectorCondition;
 import org.apache.royale.compiler.internal.codegen.js.goog.JSGoogEmitterTokens;
 import org.apache.royale.compiler.internal.css.*;
 import org.apache.royale.compiler.internal.css.codegen.CSSCompilationSession;

 import com.google.common.base.Joiner;
 import com.google.common.collect.ImmutableList;

 public class JSCSSCompilationSession extends CSSCompilationSession
 {
 	private List<String> otherCSSFunctions = Arrays.asList(
 			 "-moz-linear-gradient",
 	         "-webkit-linear-gradient",
 	         "linear-gradient",
 	         "progid:DXImageTransform.Microsoft.gradient",
 	         "translateX",
 	         "translateY",
 	         "translate",
              "blur",
              "brightness",
              "contrast",
              "drop-shadow",
              "hue-rotate",
              "invert",
              "saturate",
              "sepia"
     );
     //  this two conflicts with other css functions with the same name - comment for now
     //  "grayscale",
     //  "opacity",

     private ArrayList<String> requires;

     public String getEncodedCSS()
     {
         final ICSSDocument css = synthesisNormalizedCSS(false);
         StringBuilder sb = new StringBuilder();
         requires = new ArrayList<String>();
         encodeCSS(css, sb);
         if (sb.length() == 0)
         	return null;
         sb.append("];\n");
         for (String r : requires)
         {
             sb.append(JSGoogEmitterTokens.GOOG_REQUIRE.getToken() + "('" + formatQualifiedName(r) + "');\n");
         }

         return sb.toString();
     }

     public String emitCSS()
     {
         final ICSSDocument css = synthesisNormalizedCSS(false);
         StringBuilder sb = new StringBuilder();
         sb.append("/* Generated by Apache Royale Compiler */\n");
         walkCSS(css, sb);
         return sb.toString();
     }

     /**
      * used to minify the CSS for release mode
      */
     public static String minifyCSSString(String cssString)
     {
         //Remove empty selectors
         cssString = cssString.replaceAll("\\S+\\s?\\{[\\s\\n]+}", "");
         // Remove comments
         cssString = cssString.replaceAll("/\\*[\\d\\D]*?\\*/", "");
         cssString = cssString.replace(";}", "}");
         cssString = cssString.replaceAll("[\\n\\r]+\\s*", "");
         cssString = cssString.replaceAll("\\s+", " ");
         cssString = cssString.replaceAll("\\s?([:,;{}])\\s?", "$1");
         cssString = cssString.replaceAll("([\\s:]0)(px|pt|em)", "$1");

         return cssString;
     }

     private String fontFaceToString(CSSFontFace fontFace)
     {
         final StringBuilder result = new StringBuilder();
         result.append("@font-face {\n");
         result.append("    ");
         result.append("font-family: ");
         result.append(fontFace.getFontFamily() + ";\n");
         result.append("    ");
         result.append("font-style: ");
         result.append(fontFace.getFontStyle() + ";\n");
         result.append("    ");
         result.append("font-weight: ");
         result.append(fontFace.getFontStyle() + ";\n");
         result.append("    ");
         ArrayList<ICSSPropertyValue> sources = fontFace.getSources();
         for (ICSSPropertyValue src : sources)
         {
         	result.append("src: ");
         	result.append(src.toString() + ";\n");
         }
        	result.append("}\n");
         return result.toString();
     }

     private String cssRuleToString(ICSSRule rule)
     {
         final StringBuilder result = new StringBuilder();

         ImmutableList<ICSSMediaQueryCondition> mqList = rule.getMediaQueryConditions();
         boolean hasMediaQuery = !mqList.isEmpty();
         if (hasMediaQuery)
         {
             result.append("@media ");
             result.append(Joiner.on(" and ").join(rule.getMediaQueryConditions()));
             result.append(" {\n");
             result.append("    ");
         }

         ImmutableList<ICSSSelector> selectors = rule.getSelectorGroup();
         boolean firstOne = true;
         for (ICSSSelector selector : selectors)
         {
         	String s = selector.toString();
 	        // add "." to type selectors that don't map cleanly
 	        // to CSS type selectors to convert them to class
 	    	// selectors.
 	        if (!s.startsWith(".") && !s.startsWith("*") && !s.startsWith("#") && !s.startsWith("::"))
 	        {
 	        	String condition = null;
         		int colon = s.indexOf(":");
 	        	if (colon != -1)
 	        	{
 	        		condition = s.substring(colon);
 	        		s = s.substring(0, colon);
 	        	}
 	        	else
 	        	{
 	        		int brace = s.indexOf("[");
 	        		if (brace != -1)
 	        		{
 		        		condition = s.substring(brace);
 		        		s = s.substring(0, brace);
 	        		}
 	        		else
 	        		{
 	        			int child = s.indexOf(">");
 	        			if (child != -1)
 	        			{
 			        		condition = s.substring(child);
 			        		s = s.substring(0, child);
 	        			}
 	        			else
 	        			{
 	        				int preceded = s.indexOf("+");
 		        			if (preceded != -1)
 		        			{
 				        		condition = s.substring(preceded);
 				        		s = s.substring(0, preceded);
 		        			}
 	        			}
 	        		}
 	        	}
 	        	if (!htmlElementNames.contains(s.toLowerCase()))
 	        	{
 	        		if (s.indexOf(" ") > 0)
 	        		{
 	        			String parts[] = s.split(" ");
 	        			int n = parts.length;
 	        			s = "";
 	        			for (int i = 0; i < n; i++)
 	        			{
 	        				if (i != 0)
 	        					s += " ";
 	        				String part = parts[i];
 	        				if (!part.startsWith(".") && !part.startsWith("*") && !part.startsWith("#") && !part.startsWith("::"))
 	        				{
 	        					int pipe = part.indexOf("|");
 				        		if (pipe != -1)
 				        			part = part.substring(pipe + 1);
 				        		part = "." + part;
 	        				}
 			        		s += part;
 	        			}
 	        		}
 	        		else
 	        		{
 		        		int pipe = s.indexOf("|");
 		        		if (pipe != -1)
 		        			s = s.substring(pipe + 1);
 		        		s = "." + s;
 	        		}
 	        	}
 	        	if (condition != null)
 	        		s = s + condition;
 	        }
 	        if (!firstOne)
 	        	result.append(",\n");
 	        result.append(s);
         }

         result.append(" {\n");
         ArrayList<String> listOfProps = new ArrayList<String>();
         for (final ICSSProperty prop : rule.getProperties())
         {
             String propString = ((CSSProperty)prop).toCSSString();
             // skip class references since the won't work in CSS
             if (propString.contains("ClassReference"))
             	continue;
             listOfProps.add(propString);
         }
         Collections.sort(listOfProps);
         for (final String propString : listOfProps)
         {
             if (!hasMediaQuery)
                 result.append("    ");

             result.append("    ").append(propString).append("\n");
         }
         if (hasMediaQuery)
             result.append("    }\n");

         result.append("}\n");

         return result.toString();
     }

     private void walkCSS(ICSSDocument css, StringBuilder sb)
     {
     	for (CSSFontFace fontFace : fontFaces)
     	{
     		sb.append(fontFaceToString(fontFace));
     	}
     	if (fontFaces.size() > 0)
     		sb.append("\n\n");
         ImmutableList<ICSSRule> rules = css.getRules();
         for (ICSSRule rule : rules)
         {
         	String s = cssRuleToString(rule);
         	if (s.startsWith("@media -royale-swf"))
         		continue;
             sb.append(s);
             sb.append("\n\n");
         }
     }

     private void encodeCSS(ICSSDocument css, StringBuilder sb)
     {
         ImmutableList<ICSSRule> rules = css.getRules();
         boolean skipcomma = true;
         for (ICSSRule rule : rules)
         {
             String s = encodeRule(rule);
             if (s != null)
             {
                 if (skipcomma)
                     skipcomma = false;
                 else
                     sb.append(",\n");
                 sb.append(s);
             }
         }
     }

     List<String> htmlElementNames = Arrays.asList(
         "a",
         "aside",
         "b",
         "br",
         "body",
         "button",
         "caption",
         "code",
         "col",
         "colgroup",
         "dialog",
         "div",
         "em",
         "embed",
         "font",
         "form",
         "h1",
         "h2",
         "h3",
         "h4",
         "h5",
         "h6",
         "header",
         "hr",
         "html",
         "i",
         "img",
         "input",
         "label",
         "li",
         "main",
         /*"menu", not cross-browser, and we want to use it in Royale */
         "nav",
         "ol",
         "option",
         "p",
         "pre",
         "s",
         "select",
         "small",
         "span",
         "strong",
         "table",
         "tbody",
         "td",
         "textarea",
         "tfoot",
         "th",
         "thead",
         "tr",
         "u",
         "ul"
     );

     private String escapeDoubleQuotes(String s)
     {
         s = replaceUnicodeEncoded(s);
     	if (s.contains("\""))
     		s = s.replace("\"", "\\\"");
     	return s;
     }

     private String replaceUnicodeEncoded(String s)
     {
         //almost all escape sequences are converted to actual character sequences, except for some that don't have
         //a good result for Character.toChars (e.g. zero width space or non-breaking-space)
         //convert hex char values to unicode
         if (s.matches("\\\\[0-9a-fA-F]{1,4}")) {
             s = s.replaceAll("\\\\([0-9a-fA-F]{1,4})\\s?","\\\\u$1");
         }
         return s;
     }

     private String encodeRule(ICSSRule rule)
     {
         final StringBuilder result = new StringBuilder();

         ImmutableList<ICSSMediaQueryCondition> mqlist = rule.getMediaQueryConditions();
         int n = mqlist.size();
         if (n > 0)
         {
             if (mqlist.get(0).toString().equals("-royale-swf"))
                 return null;

             result.append(n);

             for (ICSSMediaQueryCondition mqcond : mqlist)
             {
                 result.append(",\n");
                 result.append("\"" + mqcond.toString() + "\"");
             }
         }
         else
             result.append(n);

         result.append(",\n");

         ImmutableList<ICSSSelector> slist = rule.getSelectorGroup();
         result.append(slist.size());
         for (ICSSSelector sel : slist)
         {
             result.append(",\n");
             String selName = this.resolvedSelectors.get(sel);
             if (selName == null || selName.equals("null"))
                 result.append("\"" + sel.toString() + "\"");
             else
             {
             	selName = formatQualifiedName(selName);
                 ImmutableList<ICSSSelectorCondition> conds = sel.getConditions();
                 for (ICSSSelectorCondition cond : conds)
                 {
                 	String condString = escapeDoubleQuotes(cond.toString());
                     selName += condString;
                 }
                 result.append("\"" + selName + "\"");
             }
         }
         result.append(",\n");
         result.append("function() {");

         ImmutableList<ICSSProperty> plist = rule.getProperties();
         ArrayList<String> listOfProps = new ArrayList<String>();
         for (final ICSSProperty prop : rule.getProperties())
         {
         	StringBuilder line = new StringBuilder();
             line.append("this[\"" + prop.getName() + "\"] = ");
             ICSSPropertyValue value = prop.getValue();
             if (value instanceof CSSArrayPropertyValue)
             {
                 ImmutableList<? extends ICSSPropertyValue> values = ((CSSArrayPropertyValue)value).getElements();
                 line.append("[");
                 boolean firstone = true;
                 for (ICSSPropertyValue val : values)
                 {
                     if (firstone)
                         firstone = false;
                     else
                         line.append(", ");
                     if (val instanceof CSSStringPropertyValue)
                     {
                         line.append("\"" + escapeDoubleQuotes(((CSSStringPropertyValue)val).getValue()) + "\"");
                     }
                     else if (val instanceof CSSColorPropertyValue)
                     {
                         line.append(new Integer(((CSSColorPropertyValue)val).getColorAsInt()));
                     }
                     else if (val instanceof CSSRgbColorPropertyValue)
                     {
                         line.append(new Integer(((CSSRgbColorPropertyValue)val).getColorAsInt()));
                     }
                     else if (value instanceof CSSRgbaColorPropertyValue)
                     {
                         //todo: handle alpha in the RGBA ?
                         line.append(new Long(((CSSRgbaColorPropertyValue)value).getColorAsLong()));
                     }
                     else if (val instanceof CSSKeywordPropertyValue)
                     {
                         CSSKeywordPropertyValue keywordValue = (CSSKeywordPropertyValue)val;
                         String keywordString = keywordValue.getKeyword();
                         if (IASLanguageConstants.TRUE.equals(keywordString))
                             line.append("true");
                         else if (IASLanguageConstants.FALSE.equals(keywordString))
                             line.append("false");
                         else
                             line.append("\"" + ((CSSKeywordPropertyValue)val).getKeyword() + "\"");
                     }
                     else if (val instanceof CSSNumberPropertyValue)
                     {
                         line.append(new Double(((CSSNumberPropertyValue)val).getNumber().doubleValue()));
                     }
                     else if (val instanceof CSSURLAndFormatPropertyValue)
                     {
                         line.append("\"" + escapeDoubleQuotes(((CSSURLAndFormatPropertyValue)val).toString()) + "\"");
                     }
                     else if (val instanceof CSSMultiValuePropertyValue)
                     {
                         line.append("\"" + ((CSSMultiValuePropertyValue)val).toString() + "\"");
                     }
                     else
                     {
                         line.append("unexpected value type: " + val.toString());
                     }
                 }
                 line.append("]");
             }
             else if (value instanceof CSSMultiValuePropertyValue)
             {
                 ImmutableList<? extends ICSSPropertyValue> values = ((CSSMultiValuePropertyValue)value).getElements();
                 line.append("[");
                 boolean firstone = true;
                 for (ICSSPropertyValue val : values)
                 {
                     if (firstone)
                         firstone = false;
                     else
                         line.append(", ");
                     if (val instanceof CSSStringPropertyValue)
                     {
                         line.append("\"" + escapeDoubleQuotes(((CSSStringPropertyValue)val).getValue()) + "\"");
                     }
                     else if (val instanceof CSSColorPropertyValue)
                     {
                         line.append(new Integer(((CSSColorPropertyValue)val).getColorAsInt()));
                     }
                     else if (val instanceof CSSRgbColorPropertyValue)
                     {
                         line.append(new Integer(((CSSRgbColorPropertyValue)val).getColorAsInt()));
                     }
                     else if (val instanceof CSSRgbaColorPropertyValue)
                     {
                         //todo: handle alpha in the RGBA ?
                         line.append(new Long(((CSSRgbaColorPropertyValue)val).getColorAsLong()));
                     }
                     else if (val instanceof CSSKeywordPropertyValue)
                     {
                         CSSKeywordPropertyValue keywordValue = (CSSKeywordPropertyValue)val;
                         String keywordString = keywordValue.getKeyword();
                         if (IASLanguageConstants.TRUE.equals(keywordString))
                             line.append("true");
                         else if (IASLanguageConstants.FALSE.equals(keywordString))
                             line.append("false");
                         else
                             line.append("\"" + ((CSSKeywordPropertyValue)val).getKeyword() + "\"");
                     }
                     else if (val instanceof CSSNumberPropertyValue)
                     {
                         line.append(new Double(((CSSNumberPropertyValue)val).getNumber().doubleValue()));
                     }
                     else if (val instanceof CSSURLAndFormatPropertyValue)
                     {
                         line.append("\"" + escapeDoubleQuotes(((CSSURLAndFormatPropertyValue)val).toString()) + "\"");
                     }
                     else if (val instanceof CSSMultiValuePropertyValue)
                     {
                         line.append("\"" + ((CSSMultiValuePropertyValue)val).toString() + "\"");
                     }
                     else
                     {
                         line.append("unexpected value type: " + val.toString());
                     }
                 }
                 line.append("]");
             }
             else if (value instanceof CSSStringPropertyValue)
             {
                 line.append("\"" + replaceUnicodeEncoded(((CSSStringPropertyValue)value).getValue()) + "\"");
             }
             else if (value instanceof CSSColorPropertyValue)
             {
                 line.append(new Integer(((CSSColorPropertyValue)value).getColorAsInt()));
             }
             else if (value instanceof CSSRgbColorPropertyValue)
             {
                 line.append(new Integer(((CSSRgbColorPropertyValue)value).getColorAsInt()));
             }
             else if (value instanceof CSSRgbaColorPropertyValue)
             {
                 //todo: handle alpha in the RGBA ?
                 line.append(new Long(((CSSRgbaColorPropertyValue)value).getColorAsLong()));
             }
             else if (value instanceof CSSKeywordPropertyValue)
             {
                 CSSKeywordPropertyValue keywordValue = (CSSKeywordPropertyValue)value;
                 String keywordString = keywordValue.getKeyword();
                 if (IASLanguageConstants.TRUE.equals(keywordString))
                     line.append("true");
                 else if (IASLanguageConstants.FALSE.equals(keywordString))
                     line.append("false");
                 else
                     line.append("\"" + ((CSSKeywordPropertyValue)value).getKeyword() + "\"");
             }
             else if (value instanceof CSSNumberPropertyValue)
             {
                 line.append(new Double(((CSSNumberPropertyValue)value).getNumber().doubleValue()));
             }
             else if (value instanceof CSSFunctionCallPropertyValue)
             {
                 final CSSFunctionCallPropertyValue functionCall = (CSSFunctionCallPropertyValue)value;
                 if ("ClassReference".equals(functionCall.name))
                 {
                     final String className = CSSFunctionCallPropertyValue.getSingleArgumentFromRaw(functionCall.rawArguments);
                     if ("null".equals(className))
                     {
                         // ClassReference(null) resets the property's class reference.
                         line.append("null");
                     }
                     else
                     {
                         line.append(formatQualifiedName(className));
                         requires.add(className);
                     }
                 }
                 else if ("url".equals(functionCall.name))
                 {
                     final String urlString = CSSFunctionCallPropertyValue.getSingleArgumentFromRaw(functionCall.rawArguments);
                     line.append("\"" + urlString + "\"");
                 }
                 else if ("PropertyReference".equals(functionCall.name))
                 {
                     // TODO: implement me
                 }
                 else if ("calc".equals(functionCall.name))
                 {
                     // TODO: implement me
                 	line.append("null");
                 }
                 else if ("Embed".equals(functionCall.name))
                 {
                     // TODO: implement me
                     /*
                     final ICompilerProblem e = new CSSCodeGenProblem(
                             new IllegalStateException("Unable to find compilation unit for " + functionCall));
                     problems.add(e);
                     */
                 }
                 else if (otherCSSFunctions.contains(functionCall.name))
                 {
                 	// ignore for now?
                 	line.append("null");
                 }
                 else
                 {
                     assert false : "CSS parser bug: unexpected function call property value: " + functionCall;
                     throw new IllegalStateException("Unexpected function call property value: " + functionCall);
                 }
             }
             listOfProps.add(line.toString());
         }
         Collections.sort(listOfProps);

         boolean firstProp = true;
         for (final String line2 : listOfProps)
         {
         	if (!firstProp)
         		result.append(";\n");
         	firstProp = false;
         	result.append(line2);
         }
         result.append("}");

         return result.toString();

     }

     @Override
     protected boolean keepRule(ICSSRule newRule)
     {
     	if (super.keepRule(newRule))
     		return true;

     	// might need to loop over all selectors in selector group
     	if (newRule.getSelectorGroup().size() > 0)
     	{
     		ICSSSelector selector = newRule.getSelectorGroup().get(0);
 	    	String elementName = selector.getElementName();
 	    	if (elementName != null)
 	    	{
 	    		if (htmlElementNames.contains(elementName))
 	    			return true;
 	    	}
 	    	else
 	    	{
 	    		return true;
 	    	}
     	}
         return false;
     }

     private String formatQualifiedName(String name)
     {
     	/*
     	if (name.contains("goog.") || name.startsWith("Vector."))
     		return name;
     	if (name.startsWith("."))
     	{
     		return "." + name.substring(1).replaceAll("\\.", "_");
     	}
     	name = name.replaceAll("\\.", "_");
     	*/
     	return name;
     }

 }
	/*
	*
	* Licensed to the Apache Software Foundation (ASF) under one or more
	* contributor license agreements. See the NOTICE file distributed with
	* this work for additional information regarding copyright ownership.
	* The ASF licenses this file to You under the Apache License, Version 2.0
	* (the "License"); you may not use this file except in compliance with
	* the License. You may obtain a copy of the License at
	*
	* http://www.apache.org/licenses/LICENSE-2.0
	*
	* Unless required by applicable law or agreed to in writing, software
	* distributed under the License is distributed on an "AS IS" BASIS,
	* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
	* See the License for the specific language governing permissions and
	* limitations under the License.
	*
	*/
	package org.apache.royale.compiler.internal.driver.js.royale;

	import java.util.ArrayList;
	import java.util.Arrays;
	import java.util.Collections;
	import java.util.List;

	import org.apache.royale.compiler.constants.IASLanguageConstants;
	import org.apache.royale.compiler.css.ICSSDocument;
	import org.apache.royale.compiler.css.ICSSMediaQueryCondition;
	import org.apache.royale.compiler.css.ICSSProperty;
	import org.apache.royale.compiler.css.ICSSPropertyValue;
	import org.apache.royale.compiler.css.ICSSRule;
	import org.apache.royale.compiler.css.ICSSSelector;
	import org.apache.royale.compiler.css.ICSSSelectorCondition;
	import org.apache.royale.compiler.internal.codegen.js.goog.JSGoogEmitterTokens;
	import org.apache.royale.compiler.internal.css.*;
	import org.apache.royale.compiler.internal.css.codegen.CSSCompilationSession;

	import com.google.common.base.Joiner;
	import com.google.common.collect.ImmutableList;

	public class JSCSSCompilationSession extends CSSCompilationSession
	{
	private List<String> otherCSSFunctions = Arrays.asList(
	"-moz-linear-gradient",
	"-webkit-linear-gradient",
	"linear-gradient",
	"progid:DXImageTransform.Microsoft.gradient",
	"translateX",
	"translateY",
	"translate",
	"blur",
	"brightness",
	"contrast",
	"drop-shadow",
	"hue-rotate",
	"invert",
	"saturate",
	"sepia"
	);
	// this two conflicts with other css functions with the same name - comment for now
	// "grayscale",
	// "opacity",

	private ArrayList<String> requires;

	public String getEncodedCSS()
	{
	final ICSSDocument css = synthesisNormalizedCSS(false);
	StringBuilder sb = new StringBuilder();
	requires = new ArrayList<String>();
	encodeCSS(css, sb);
	if (sb.length() == 0)
	return null;
	sb.append("];\n");
	for (String r : requires)
	{
	sb.append(JSGoogEmitterTokens.GOOG_REQUIRE.getToken() + "('" + formatQualifiedName(r) + "');\n");
	}

	return sb.toString();
	}

	public String emitCSS()
	{
	final ICSSDocument css = synthesisNormalizedCSS(false);
	StringBuilder sb = new StringBuilder();
	sb.append("/* Generated by Apache Royale Compiler */\n");
	walkCSS(css, sb);
	return sb.toString();
	}

	/**
	* used to minify the CSS for release mode
	*/
	public static String minifyCSSString(String cssString)
	{
	//Remove empty selectors
	cssString = cssString.replaceAll("\\S+\\s?\\{[\\s\\n]+}", "");
	// Remove comments
	cssString = cssString.replaceAll("/\\[\\d\\D]?\\*/", "");
	cssString = cssString.replace(";}", "}");
	cssString = cssString.replaceAll("[\\n\\r]+\\s*", "");
	cssString = cssString.replaceAll("\\s+", " ");
	cssString = cssString.replaceAll("\\s?([:,;{}])\\s?", "$1");
	cssString = cssString.replaceAll("([\\s:]0)(px\|pt\|em)", "$1");

	return cssString;
	}

	private String fontFaceToString(CSSFontFace fontFace)
	{
	final StringBuilder result = new StringBuilder();
	result.append("@font-face {\n");
	result.append(" ");
	result.append("font-family: ");
	result.append(fontFace.getFontFamily() + ";\n");
	result.append(" ");
	result.append("font-style: ");
	result.append(fontFace.getFontStyle() + ";\n");
	result.append(" ");
	result.append("font-weight: ");
	result.append(fontFace.getFontStyle() + ";\n");
	result.append(" ");
	ArrayList<ICSSPropertyValue> sources = fontFace.getSources();
	for (ICSSPropertyValue src : sources)
	{
	result.append("src: ");
	result.append(src.toString() + ";\n");
	}
	result.append("}\n");
	return result.toString();
	}

	private String cssRuleToString(ICSSRule rule)
	{
	final StringBuilder result = new StringBuilder();

	ImmutableList<ICSSMediaQueryCondition> mqList = rule.getMediaQueryConditions();
	boolean hasMediaQuery = !mqList.isEmpty();
	if (hasMediaQuery)
	{
	result.append("@media ");
	result.append(Joiner.on(" and ").join(rule.getMediaQueryConditions()));
	result.append(" {\n");
	result.append(" ");
	}

	ImmutableList<ICSSSelector> selectors = rule.getSelectorGroup();
	boolean firstOne = true;
	for (ICSSSelector selector : selectors)
	{
	String s = selector.toString();
	// add "." to type selectors that don't map cleanly
	// to CSS type selectors to convert them to class
	// selectors.
	if (!s.startsWith(".") && !s.startsWith("*") && !s.startsWith("#") && !s.startsWith("::"))
	{
	String condition = null;
	int colon = s.indexOf(":");
	if (colon != -1)
	{
	condition = s.substring(colon);
	s = s.substring(0, colon);
	}
	else
	{
	int brace = s.indexOf("[");
	if (brace != -1)
	{
	condition = s.substring(brace);
	s = s.substring(0, brace);
	}
	else
	{
	int child = s.indexOf(">");
	if (child != -1)
	{
	condition = s.substring(child);
	s = s.substring(0, child);
	}
	else
	{
	int preceded = s.indexOf("+");
	if (preceded != -1)
	{
	condition = s.substring(preceded);
	s = s.substring(0, preceded);
	}
	}
	}
	}
	if (!htmlElementNames.contains(s.toLowerCase()))
	{
	if (s.indexOf(" ") > 0)
	{
	String parts[] = s.split(" ");
	int n = parts.length;
	s = "";
	for (int i = 0; i < n; i++)
	{
	if (i != 0)
	s += " ";
	String part = parts[i];
	if (!part.startsWith(".") && !part.startsWith("*") && !part.startsWith("#") && !part.startsWith("::"))
	{
	int pipe = part.indexOf("\|");
	if (pipe != -1)
	part = part.substring(pipe + 1);
	part = "." + part;
	}
	s += part;
	}
	}
	else
	{
	int pipe = s.indexOf("\|");
	if (pipe != -1)
	s = s.substring(pipe + 1);
	s = "." + s;
	}
	}
	if (condition != null)
	s = s + condition;
	}
	if (!firstOne)
	result.append(",\n");
	result.append(s);
	}

	result.append(" {\n");
	ArrayList<String> listOfProps = new ArrayList<String>();
	for (final ICSSProperty prop : rule.getProperties())
	{
	String propString = ((CSSProperty)prop).toCSSString();
	// skip class references since the won't work in CSS
	if (propString.contains("ClassReference"))
	continue;
	listOfProps.add(propString);
	}
	Collections.sort(listOfProps);
	for (final String propString : listOfProps)
	{
	if (!hasMediaQuery)
	result.append(" ");

	result.append(" ").append(propString).append("\n");
	}
	if (hasMediaQuery)
	result.append(" }\n");

	result.append("}\n");

	return result.toString();
	}

	private void walkCSS(ICSSDocument css, StringBuilder sb)
	{
	for (CSSFontFace fontFace : fontFaces)
	{
	sb.append(fontFaceToString(fontFace));
	}
	if (fontFaces.size() > 0)
	sb.append("\n\n");
	ImmutableList<ICSSRule> rules = css.getRules();
	for (ICSSRule rule : rules)
	{
	String s = cssRuleToString(rule);
	if (s.startsWith("@media -royale-swf"))
	continue;
	sb.append(s);
	sb.append("\n\n");
	}
	}

	private void encodeCSS(ICSSDocument css, StringBuilder sb)
	{
	ImmutableList<ICSSRule> rules = css.getRules();
	boolean skipcomma = true;
	for (ICSSRule rule : rules)
	{
	String s = encodeRule(rule);
	if (s != null)
	{
	if (skipcomma)
	skipcomma = false;
	else
	sb.append(",\n");
	sb.append(s);
	}
	}
	}

	List<String> htmlElementNames = Arrays.asList(
	"a",
	"aside",
	"b",
	"br",
	"body",
	"button",
	"caption",
	"code",
	"col",
	"colgroup",
	"dialog",
	"div",
	"em",
	"embed",
	"font",
	"form",
	"h1",
	"h2",
	"h3",
	"h4",
	"h5",
	"h6",
	"header",
	"hr",
	"html",
	"i",
	"img",
	"input",
	"label",
	"li",
	"main",
	/"menu", not cross-browser, and we want to use it in Royale /
	"nav",
	"ol",
	"option",
	"p",
	"pre",
	"s",
	"select",
	"small",
	"span",
	"strong",
	"table",
	"tbody",
	"td",
	"textarea",
	"tfoot",
	"th",
	"thead",
	"tr",
	"u",
	"ul"
	);

	private String escapeDoubleQuotes(String s)
	{
	s = replaceUnicodeEncoded(s);
	if (s.contains("\""))
	s = s.replace("\"", "\\\"");
	return s;
	}

	private String replaceUnicodeEncoded(String s)
	{
	//almost all escape sequences are converted to actual character sequences, except for some that don't have
	//a good result for Character.toChars (e.g. zero width space or non-breaking-space)
	//convert hex char values to unicode
	if (s.matches("\\\\[0-9a-fA-F]{1,4}")) {
	s = s.replaceAll("\\\\([0-9a-fA-F]{1,4})\\s?","\\\\u$1");
	}
	return s;
	}

	private String encodeRule(ICSSRule rule)
	{
	final StringBuilder result = new StringBuilder();

	ImmutableList<ICSSMediaQueryCondition> mqlist = rule.getMediaQueryConditions();
	int n = mqlist.size();
	if (n > 0)
	{
	if (mqlist.get(0).toString().equals("-royale-swf"))
	return null;

	result.append(n);

	for (ICSSMediaQueryCondition mqcond : mqlist)
	{
	result.append(",\n");
	result.append("\"" + mqcond.toString() + "\"");
	}
	}
	else
	result.append(n);

	result.append(",\n");

	ImmutableList<ICSSSelector> slist = rule.getSelectorGroup();
	result.append(slist.size());
	for (ICSSSelector sel : slist)
	{
	result.append(",\n");
	String selName = this.resolvedSelectors.get(sel);
	if (selName == null \|\| selName.equals("null"))
	result.append("\"" + sel.toString() + "\"");
	else
	{
	selName = formatQualifiedName(selName);
	ImmutableList<ICSSSelectorCondition> conds = sel.getConditions();
	for (ICSSSelectorCondition cond : conds)
	{
	String condString = escapeDoubleQuotes(cond.toString());
	selName += condString;
	}
	result.append("\"" + selName + "\"");
	}
	}
	result.append(",\n");
	result.append("function() {");

	ImmutableList<ICSSProperty> plist = rule.getProperties();
	ArrayList<String> listOfProps = new ArrayList<String>();
	for (final ICSSProperty prop : rule.getProperties())
	{
	StringBuilder line = new StringBuilder();
	line.append("this[\"" + prop.getName() + "\"] = ");
	ICSSPropertyValue value = prop.getValue();
	if (value instanceof CSSArrayPropertyValue)
	{
	ImmutableList<? extends ICSSPropertyValue> values = ((CSSArrayPropertyValue)value).getElements();
	line.append("[");
	boolean firstone = true;
	for (ICSSPropertyValue val : values)
	{
	if (firstone)
	firstone = false;
	else
	line.append(", ");
	if (val instanceof CSSStringPropertyValue)
	{
	line.append("\"" + escapeDoubleQuotes(((CSSStringPropertyValue)val).getValue()) + "\"");
	}
	else if (val instanceof CSSColorPropertyValue)
	{
	line.append(new Integer(((CSSColorPropertyValue)val).getColorAsInt()));
	}
	else if (val instanceof CSSRgbColorPropertyValue)
	{
	line.append(new Integer(((CSSRgbColorPropertyValue)val).getColorAsInt()));
	}
	else if (value instanceof CSSRgbaColorPropertyValue)
	{
	//todo: handle alpha in the RGBA ?
	line.append(new Long(((CSSRgbaColorPropertyValue)value).getColorAsLong()));
	}
	else if (val instanceof CSSKeywordPropertyValue)
	{
	CSSKeywordPropertyValue keywordValue = (CSSKeywordPropertyValue)val;
	String keywordString = keywordValue.getKeyword();
	if (IASLanguageConstants.TRUE.equals(keywordString))
	line.append("true");
	else if (IASLanguageConstants.FALSE.equals(keywordString))
	line.append("false");
	else
	line.append("\"" + ((CSSKeywordPropertyValue)val).getKeyword() + "\"");
	}
	else if (val instanceof CSSNumberPropertyValue)
	{
	line.append(new Double(((CSSNumberPropertyValue)val).getNumber().doubleValue()));
	}
	else if (val instanceof CSSURLAndFormatPropertyValue)
	{
	line.append("\"" + escapeDoubleQuotes(((CSSURLAndFormatPropertyValue)val).toString()) + "\"");
	}
	else if (val instanceof CSSMultiValuePropertyValue)
	{
	line.append("\"" + ((CSSMultiValuePropertyValue)val).toString() + "\"");
	}
	else
	{
	line.append("unexpected value type: " + val.toString());
	}
	}
	line.append("]");
	}
	else if (value instanceof CSSMultiValuePropertyValue)
	{
	ImmutableList<? extends ICSSPropertyValue> values = ((CSSMultiValuePropertyValue)value).getElements();
	line.append("[");
	boolean firstone = true;
	for (ICSSPropertyValue val : values)
	{
	if (firstone)
	firstone = false;
	else
	line.append(", ");
	if (val instanceof CSSStringPropertyValue)
	{
	line.append("\"" + escapeDoubleQuotes(((CSSStringPropertyValue)val).getValue()) + "\"");
	}
	else if (val instanceof CSSColorPropertyValue)
	{
	line.append(new Integer(((CSSColorPropertyValue)val).getColorAsInt()));
	}
	else if (val instanceof CSSRgbColorPropertyValue)
	{
	line.append(new Integer(((CSSRgbColorPropertyValue)val).getColorAsInt()));
	}
	else if (val instanceof CSSRgbaColorPropertyValue)
	{
	//todo: handle alpha in the RGBA ?
	line.append(new Long(((CSSRgbaColorPropertyValue)val).getColorAsLong()));
	}
	else if (val instanceof CSSKeywordPropertyValue)
	{
	CSSKeywordPropertyValue keywordValue = (CSSKeywordPropertyValue)val;
	String keywordString = keywordValue.getKeyword();
	if (IASLanguageConstants.TRUE.equals(keywordString))
	line.append("true");
	else if (IASLanguageConstants.FALSE.equals(keywordString))
	line.append("false");
	else
	line.append("\"" + ((CSSKeywordPropertyValue)val).getKeyword() + "\"");
	}
	else if (val instanceof CSSNumberPropertyValue)
	{
	line.append(new Double(((CSSNumberPropertyValue)val).getNumber().doubleValue()));
	}
	else if (val instanceof CSSURLAndFormatPropertyValue)
	{
	line.append("\"" + escapeDoubleQuotes(((CSSURLAndFormatPropertyValue)val).toString()) + "\"");
	}
	else if (val instanceof CSSMultiValuePropertyValue)
	{
	line.append("\"" + ((CSSMultiValuePropertyValue)val).toString() + "\"");
	}
	else
	{
	line.append("unexpected value type: " + val.toString());
	}
	}
	line.append("]");
	}
	else if (value instanceof CSSStringPropertyValue)
	{
	line.append("\"" + replaceUnicodeEncoded(((CSSStringPropertyValue)value).getValue()) + "\"");
	}
	else if (value instanceof CSSColorPropertyValue)
	{
	line.append(new Integer(((CSSColorPropertyValue)value).getColorAsInt()));
	}
	else if (value instanceof CSSRgbColorPropertyValue)
	{
	line.append(new Integer(((CSSRgbColorPropertyValue)value).getColorAsInt()));
	}
	else if (value instanceof CSSRgbaColorPropertyValue)
	{
	//todo: handle alpha in the RGBA ?
	line.append(new Long(((CSSRgbaColorPropertyValue)value).getColorAsLong()));
	}
	else if (value instanceof CSSKeywordPropertyValue)
	{
	CSSKeywordPropertyValue keywordValue = (CSSKeywordPropertyValue)value;
	String keywordString = keywordValue.getKeyword();
	if (IASLanguageConstants.TRUE.equals(keywordString))
	line.append("true");
	else if (IASLanguageConstants.FALSE.equals(keywordString))
	line.append("false");
	else
	line.append("\"" + ((CSSKeywordPropertyValue)value).getKeyword() + "\"");
	}
	else if (value instanceof CSSNumberPropertyValue)
	{
	line.append(new Double(((CSSNumberPropertyValue)value).getNumber().doubleValue()));
	}
	else if (value instanceof CSSFunctionCallPropertyValue)
	{
	final CSSFunctionCallPropertyValue functionCall = (CSSFunctionCallPropertyValue)value;
	if ("ClassReference".equals(functionCall.name))
	{
	final String className = CSSFunctionCallPropertyValue.getSingleArgumentFromRaw(functionCall.rawArguments);
	if ("null".equals(className))
	{
	// ClassReference(null) resets the property's class reference.
	line.append("null");
	}
	else
	{
	line.append(formatQualifiedName(className));
	requires.add(className);
	}
	}
	else if ("url".equals(functionCall.name))
	{
	final String urlString = CSSFunctionCallPropertyValue.getSingleArgumentFromRaw(functionCall.rawArguments);
	line.append("\"" + urlString + "\"");
	}
	else if ("PropertyReference".equals(functionCall.name))
	{
	// TODO: implement me
	}
	else if ("calc".equals(functionCall.name))
	{
	// TODO: implement me
	line.append("null");
	}
	else if ("Embed".equals(functionCall.name))
	{
	// TODO: implement me
	/*
	final ICompilerProblem e = new CSSCodeGenProblem(
	new IllegalStateException("Unable to find compilation unit for " + functionCall));
	problems.add(e);
	*/
	}
	else if (otherCSSFunctions.contains(functionCall.name))
	{
	// ignore for now?
	line.append("null");
	}
	else
	{
	assert false : "CSS parser bug: unexpected function call property value: " + functionCall;
	throw new IllegalStateException("Unexpected function call property value: " + functionCall);
	}
	}
	listOfProps.add(line.toString());
	}
	Collections.sort(listOfProps);

	boolean firstProp = true;
	for (final String line2 : listOfProps)
	{
	if (!firstProp)
	result.append(";\n");
	firstProp = false;
	result.append(line2);
	}
	result.append("}");

	return result.toString();

	}

	@Override
	protected boolean keepRule(ICSSRule newRule)
	{
	if (super.keepRule(newRule))
	return true;

	// might need to loop over all selectors in selector group
	if (newRule.getSelectorGroup().size() > 0)
	{
	ICSSSelector selector = newRule.getSelectorGroup().get(0);
	String elementName = selector.getElementName();
	if (elementName != null)
	{
	if (htmlElementNames.contains(elementName))
	return true;
	}
	else
	{
	return true;
	}
	}
	return false;
	}

	private String formatQualifiedName(String name)
	{
	/*
	if (name.contains("goog.") \|\| name.startsWith("Vector."))
	return name;
	if (name.startsWith("."))
	{
	return "." + name.substring(1).replaceAll("\\.", "_");
	}
	name = name.replaceAll("\\.", "_");
	*/
	return name;
	}

	}