2.1/user/src/com/google/gwt/resources/css/ast/CssProperty.java - gwt - Git at Google

 /*
  * Copyright 2008 Google Inc.
  *
  * Licensed 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 com.google.gwt.resources.css.ast;

 import com.google.gwt.core.ext.Generator;

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

 /**
  * Maps a named property to a Value.
  */
 public class CssProperty extends CssNode {

   /**
    * Represents a sequence of no-arg method invocations.
    */
   public static class DotPathValue extends Value {
     private final String path;
     private final String suffix;

     public DotPathValue(String path) {
       assert path != null : "path";
       this.path = path;
       this.suffix = null;
     }

     public DotPathValue(String path, String suffix) {
       assert path != null : "path";
       assert suffix != null : "suffix";
       this.path = path;
       this.suffix = suffix;
     }

     @Override
     public String getExpression() {
       StringBuilder toReturn = new StringBuilder();
       toReturn.append(path.replace(".", "()."));
       toReturn.append("()");
       if (suffix != null) {
         toReturn.append(" + \"");
         toReturn.append(Generator.escape(suffix));
         toReturn.append("\"");
       }
       return toReturn.toString();
     }

     public List<String> getParts() {
       return Arrays.asList(path.split("\\."));
     }

     public String getPath() {
       return path;
     }

     public String getSuffix() {
       return suffix;
     }

     @Override
     public DotPathValue isDotPathValue() {
       return this;
     }

     @Override
     public String toCss() {
       return "value(\"" + path + "\""
           + (suffix == null ? "" : (", \"" + suffix + "\"")) + ")";
     }
   }

   /**
    * Represents a literal Java expression.
    */
   public static class ExpressionValue extends Value {
     private final String expression;

     public ExpressionValue(String expression) {
       this.expression = expression;
     }

     @Override
     public String getExpression() {
       return expression;
     }

     @Override
     public ExpressionValue isExpressionValue() {
       return this;
     }

     @Override
     public String toCss() {
       return "/* Java expression */";
     }

     /**
      * For debugging only.
      */
     @Override
     public String toString() {
       return expression;
     }
   }

   /**
    * Represents an identifier in the CSS source.
    */
   public static class IdentValue extends Value {
     private final String ident;

     public IdentValue(String ident) {
       this.ident = ident;
     }

     @Override
     public String getExpression() {
       return '"' + Generator.escape(ident) + '"';
     }

     public String getIdent() {
       return ident;
     }

     @Override
     public IdentValue isIdentValue() {
       return this;
     }

     @Override
     public String toCss() {
       return ident;
     }
   }

   /**
    * Represents a space-separated list of Values.
    */
   public static class ListValue extends Value {
     private final List<Value> values;

     public ListValue(List<Value> values) {
       this.values = Collections.unmodifiableList(new ArrayList<Value>(values));
     }

     public ListValue(Value... values) {
       this(Arrays.asList(values));
     }

     @Override
     public String getExpression() {
       StringBuilder toReturn = new StringBuilder();
       boolean first = true;
       for (Iterator<Value> i = values.iterator(); i.hasNext();) {
         Value value = i.next();
         if (!first && value.isSpaceRequired()) {
           toReturn.append("\" \" +");
         }
         toReturn.append(value.getExpression());
         if (i.hasNext()) {
           toReturn.append("+ ");
         }
         first = false;
       }
       return toReturn.toString();
     }

     public List<Value> getValues() {
       return values;
     }

     @Override
     public ListValue isListValue() {
       return this;
     }

     @Override
     public String toCss() {
       StringBuilder sb = new StringBuilder();
       for (Value v : values) {
         sb.append(" ").append(v.toCss());
       }
       return sb.substring(1);
     }
   }

   /**
    * Represents a numeric value, possibly with attached units.
    */
   public static class NumberValue extends Value {
     private final String css;
     private final String expression;
     private final String units;
     private final float value;

     public NumberValue(float value) {
       this(value, null);
     }

     public NumberValue(float value, String units) {
       this.value = value;
       this.units = units;

       String s;
       int i = (int) value;
       if (i == value) {
         s = String.valueOf(i);
       } else {
         s = String.valueOf(value);
       }

       if (units != null && value != 0) {
         css = s + units;
         expression = '"' + s + Generator.escape(units) + '"';
       } else if (value == 0) {
         css = "0";
         expression = "\"0\"";
       } else {
         css = s;
         expression = '"' + s + '"';
       }
     }

     @Override
     public String getExpression() {
       return expression;
     }

     public String getUnits() {
       return units;
     }

     public float getValue() {
       return value;
     }

     @Override
     public NumberValue isNumberValue() {
       return this;
     }

     @Override
     public String toCss() {
       return css;
     }
   }

   /**
    * Represents one or more quoted string literals.
    */
   public static class StringValue extends Value {
     private static String escapeValue(String s, boolean inDoubleQuotes) {
       StringBuilder b = new StringBuilder();
       for (char c : s.toCharArray()) {
         if (Character.isISOControl(c)) {
           b.append('\\').append(Integer.toHexString(c).toUpperCase()).append(
               " ");
         } else {
           switch (c) {
             case '\'':
               // Special case a single quote in a pair of double quotes
               if (inDoubleQuotes) {
                 b.append(c);
               } else {
                 b.append("\\'");
               }
               break;

             case '"':
               // Special case a single quote in a pair of single quotes
               if (inDoubleQuotes) {
                 b.append("\\\"");
               } else {
                 b.append(c);
               }
               break;

             case '\\':
               b.append("\\\\");
               break;

             default:
               b.append(c);
           }
         }
       }

       return b.toString();
     }

     private final String value;

     public StringValue(String value) {
       this.value = value;
     }

     @Override
     public String getExpression() {
       // The escaped CSS content has to be escaped to be a valid Java literal
       return "\"" + Generator.escape(toCss()) + "\"";
     }

     public String getValue() {
       return value;
     }

     @Override
     public StringValue isStringValue() {
       return this;
     }

     /**
      * Returns a escaped, quoted representation of the underlying value.
      */
     @Override
     public String toCss() {
       return '"' + escapeValue(value, true) + '"';
     }
   }

   /**
    * Represents a token in the CSS source.
    */
   public static class TokenValue extends IdentValue {

     public TokenValue(String token) {
       super(token);
     }

     @Override
     public boolean isSpaceRequired() {
       return false;
     }
   }

   /**
    * An abstract encapsulation of property values in GWT CSS.
    */
   public abstract static class Value {
     /**
      * Generate a Java expression whose execution results in the value.
      */
     public abstract String getExpression();

     public DotPathValue isDotPathValue() {
       return null;
     }

     public ExpressionValue isExpressionValue() {
       return null;
     }

     public IdentValue isIdentValue() {
       return null;
     }

     public ListValue isListValue() {
       return null;
     }

     public NumberValue isNumberValue() {
       return null;
     }

     public boolean isSpaceRequired() {
       return true;
     }

     public StringValue isStringValue() {
       return null;
     }

     /**
      * Generate a CSS expression that represents the Value.
      */
     public abstract String toCss();

     /**
      * For debugging only.
      */
     @Override
     public String toString() {
       return toCss();
     }
   }

   private boolean important;

   private String name;
   private ListValue value;

   public CssProperty(String name, Value value, boolean important) {
     assert name.length() > 0 : "name";
     this.name = name;
     setValue(value);
     this.important = important;
   }

   public String getName() {
     return name;
   }

   public ListValue getValues() {
     return value;
   }

   public boolean isImportant() {
     return important;
   }

   public void setImportant(boolean important) {
     this.important = important;
   }

   public void setName(String name) {
     this.name = name;
   }

   public void setValue(Value value) {
     this.value = value.isListValue();
     if (this.value == null) {
       this.value = new ListValue(value);
     }
   }

   public void traverse(CssVisitor visitor, Context context) {
     visitor.visit(this, context);
     visitor.endVisit(this, context);
   }
 }
	/*
	* Copyright 2008 Google Inc.
	*
	* Licensed 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 com.google.gwt.resources.css.ast;

	import com.google.gwt.core.ext.Generator;

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

	/**
	* Maps a named property to a Value.
	*/
	public class CssProperty extends CssNode {

	/**
	* Represents a sequence of no-arg method invocations.
	*/
	public static class DotPathValue extends Value {
	private final String path;
	private final String suffix;

	public DotPathValue(String path) {
	assert path != null : "path";
	this.path = path;
	this.suffix = null;
	}

	public DotPathValue(String path, String suffix) {
	assert path != null : "path";
	assert suffix != null : "suffix";
	this.path = path;
	this.suffix = suffix;
	}

	@Override
	public String getExpression() {
	StringBuilder toReturn = new StringBuilder();
	toReturn.append(path.replace(".", "()."));
	toReturn.append("()");
	if (suffix != null) {
	toReturn.append(" + \"");
	toReturn.append(Generator.escape(suffix));
	toReturn.append("\"");
	}
	return toReturn.toString();
	}

	public List<String> getParts() {
	return Arrays.asList(path.split("\\."));
	}

	public String getPath() {
	return path;
	}

	public String getSuffix() {
	return suffix;
	}

	@Override
	public DotPathValue isDotPathValue() {
	return this;
	}

	@Override
	public String toCss() {
	return "value(\"" + path + "\""
	+ (suffix == null ? "" : (", \"" + suffix + "\"")) + ")";
	}
	}

	/**
	* Represents a literal Java expression.
	*/
	public static class ExpressionValue extends Value {
	private final String expression;

	public ExpressionValue(String expression) {
	this.expression = expression;
	}

	@Override
	public String getExpression() {
	return expression;
	}

	@Override
	public ExpressionValue isExpressionValue() {
	return this;
	}

	@Override
	public String toCss() {
	return "/* Java expression */";
	}

	/**
	* For debugging only.
	*/
	@Override
	public String toString() {
	return expression;
	}
	}

	/**
	* Represents an identifier in the CSS source.
	*/
	public static class IdentValue extends Value {
	private final String ident;

	public IdentValue(String ident) {
	this.ident = ident;
	}

	@Override
	public String getExpression() {
	return '"' + Generator.escape(ident) + '"';
	}

	public String getIdent() {
	return ident;
	}

	@Override
	public IdentValue isIdentValue() {
	return this;
	}

	@Override
	public String toCss() {
	return ident;
	}
	}

	/**
	* Represents a space-separated list of Values.
	*/
	public static class ListValue extends Value {
	private final List<Value> values;

	public ListValue(List<Value> values) {
	this.values = Collections.unmodifiableList(new ArrayList<Value>(values));
	}

	public ListValue(Value... values) {
	this(Arrays.asList(values));
	}

	@Override
	public String getExpression() {
	StringBuilder toReturn = new StringBuilder();
	boolean first = true;
	for (Iterator<Value> i = values.iterator(); i.hasNext();) {
	Value value = i.next();
	if (!first && value.isSpaceRequired()) {
	toReturn.append("\" \" +");
	}
	toReturn.append(value.getExpression());
	if (i.hasNext()) {
	toReturn.append("+ ");
	}
	first = false;
	}
	return toReturn.toString();
	}

	public List<Value> getValues() {
	return values;
	}

	@Override
	public ListValue isListValue() {
	return this;
	}

	@Override
	public String toCss() {
	StringBuilder sb = new StringBuilder();
	for (Value v : values) {
	sb.append(" ").append(v.toCss());
	}
	return sb.substring(1);
	}
	}

	/**
	* Represents a numeric value, possibly with attached units.
	*/
	public static class NumberValue extends Value {
	private final String css;
	private final String expression;
	private final String units;
	private final float value;

	public NumberValue(float value) {
	this(value, null);
	}

	public NumberValue(float value, String units) {
	this.value = value;
	this.units = units;

	String s;
	int i = (int) value;
	if (i == value) {
	s = String.valueOf(i);
	} else {
	s = String.valueOf(value);
	}

	if (units != null && value != 0) {
	css = s + units;
	expression = '"' + s + Generator.escape(units) + '"';
	} else if (value == 0) {
	css = "0";
	expression = "\"0\"";
	} else {
	css = s;
	expression = '"' + s + '"';
	}
	}

	@Override
	public String getExpression() {
	return expression;
	}

	public String getUnits() {
	return units;
	}

	public float getValue() {
	return value;
	}

	@Override
	public NumberValue isNumberValue() {
	return this;
	}

	@Override
	public String toCss() {
	return css;
	}
	}

	/**
	* Represents one or more quoted string literals.
	*/
	public static class StringValue extends Value {
	private static String escapeValue(String s, boolean inDoubleQuotes) {
	StringBuilder b = new StringBuilder();
	for (char c : s.toCharArray()) {
	if (Character.isISOControl(c)) {
	b.append('\\').append(Integer.toHexString(c).toUpperCase()).append(
	" ");
	} else {
	switch (c) {
	case '\'':
	// Special case a single quote in a pair of double quotes
	if (inDoubleQuotes) {
	b.append(c);
	} else {
	b.append("\\'");
	}
	break;

	case '"':
	// Special case a single quote in a pair of single quotes
	if (inDoubleQuotes) {
	b.append("\\\"");
	} else {
	b.append(c);
	}
	break;

	case '\\':
	b.append("\\\\");
	break;

	default:
	b.append(c);
	}
	}
	}

	return b.toString();
	}

	private final String value;

	public StringValue(String value) {
	this.value = value;
	}

	@Override
	public String getExpression() {
	// The escaped CSS content has to be escaped to be a valid Java literal
	return "\"" + Generator.escape(toCss()) + "\"";
	}

	public String getValue() {
	return value;
	}

	@Override
	public StringValue isStringValue() {
	return this;
	}

	/**
	* Returns a escaped, quoted representation of the underlying value.
	*/
	@Override
	public String toCss() {
	return '"' + escapeValue(value, true) + '"';
	}
	}

	/**
	* Represents a token in the CSS source.
	*/
	public static class TokenValue extends IdentValue {

	public TokenValue(String token) {
	super(token);
	}

	@Override
	public boolean isSpaceRequired() {
	return false;
	}
	}

	/**
	* An abstract encapsulation of property values in GWT CSS.
	*/
	public abstract static class Value {
	/**
	* Generate a Java expression whose execution results in the value.
	*/
	public abstract String getExpression();

	public DotPathValue isDotPathValue() {
	return null;
	}

	public ExpressionValue isExpressionValue() {
	return null;
	}

	public IdentValue isIdentValue() {
	return null;
	}

	public ListValue isListValue() {
	return null;
	}

	public NumberValue isNumberValue() {
	return null;
	}

	public boolean isSpaceRequired() {
	return true;
	}

	public StringValue isStringValue() {
	return null;
	}

	/**
	* Generate a CSS expression that represents the Value.
	*/
	public abstract String toCss();

	/**
	* For debugging only.
	*/
	@Override
	public String toString() {
	return toCss();
	}
	}

	private boolean important;

	private String name;
	private ListValue value;

	public CssProperty(String name, Value value, boolean important) {
	assert name.length() > 0 : "name";
	this.name = name;
	setValue(value);
	this.important = important;
	}

	public String getName() {
	return name;
	}

	public ListValue getValues() {
	return value;
	}

	public boolean isImportant() {
	return important;
	}

	public void setImportant(boolean important) {
	this.important = important;
	}

	public void setName(String name) {
	this.name = name;
	}

	public void setValue(Value value) {
	this.value = value.isListValue();
	if (this.value == null) {
	this.value = new ListValue(value);
	}
	}

	public void traverse(CssVisitor visitor, Context context) {
	visitor.visit(this, context);
	visitor.endVisit(this, context);
	}
	}