resourcestatement.java

外国人写的c#语法解析器

    {
      Element entry = new Element("entry");
      String expression = currentNode.getText();
      Object value = evaluate(expression, currentNode.getLine(), currentNode.getColumn());
      entry.setAttribute("value", convertToString(value));
      resourceElement.addContent(entry);
      currentNode = currentNode.getNextSibling();
    }
  }

  //------------------------------------------------------------------------------------------------
  
  /**
   * Converts a "toolbar" entry to XML.
   * 
   * @param sourceNode The node containing the AST data to convert.
   * @param resourceElement The entry to which the new nodes must be added.
   */
  private void convertToolbarEntry(AST sourceNode, Element resourceElement)
  {
    resourceElement.setAttribute("type", "toolbar");

    AST currentNode = sourceNode.getFirstChild();
    if (currentNode != null)
    {
      if (currentNode.getType() == RCParserTokenTypes.RESOURCE_ATTRIBUTES)
      {
        convertResourceAttributes(resourceElement, currentNode);
        currentNode = currentNode.getNextSibling();
      }
      
      // The next two entries are button width and height.
      processEntryWithEvaluation(currentNode, "button-width", resourceElement);
      currentNode = currentNode.getNextSibling();
      processEntryWithEvaluation(currentNode, "button-height", resourceElement);
      currentNode = currentNode.getNextSibling();
      
      // After the button sizes follows the list of toolbar buttons.
      while (currentNode != null)
      {
        switch (currentNode.getType())
        {
          case RCParserTokenTypes.LITERAL_button:
          {
            AST idNode = currentNode.getFirstChild();
            processEntryWithEvaluation(idNode, "button", resourceElement);
            break;
          }
          case RCParserTokenTypes.LITERAL_separator:
          {
            Element separatorElement = new Element("Separator");
            resourceElement.addContent(separatorElement);
            break;
          }
          default:
            // Actually this should never happen as the parser already takes care to find the
            // correct syntax.
            reportError("Invalid toolbar content definition.");
        }
        currentNode = currentNode.getNextSibling();
      }
    }  
  }

  //------------------------------------------------------------------------------------------------
  
  /**
   * Converts the given symbol value into a string that can be placed into a DOM element.
   * If the object is a string literal then it gets unquoted first.
   * 
   * @param value The value to convert.
   * @return The converted value as string.
   */
  private String convertToString(Object value)
  {
    if (value instanceof AST)
    {
      value = evaluate((AST) value);
    }
    else
      if (value instanceof String)
      {
        String string = (String) value;
        if (string.startsWith("\""))
          return string.substring(1, string.length() - 1);
        else
          return string;
      }
    return value.toString();
  }

  //------------------------------------------------------------------------------------------------
  
  /**
   * Converts a user defined entry to XML.
   * 
   * @param sourceNode The node containing the AST data to convert.
   * @param resourceElement The entry to which the new nodes must be added.
   */
  private void convertUserDefinedEntry(AST sourceNode, Element resourceElement)
  {
    resourceElement.setAttribute("type", "user-defined");
    AST currentNode = sourceNode.getFirstChild();
    resourceElement.setAttribute("resource-type", currentNode.getText());
    currentNode = currentNode.getNextSibling();
    if (currentNode != null)
    {
      if (currentNode.getType() == RCParserTokenTypes.RESOURCE_ATTRIBUTES)
      {
        convertResourceAttributes(resourceElement, currentNode);
        currentNode = currentNode.getNextSibling();
      }
      
      // Optional common resource info part.
      if (currentNode != null)
      {
        while (currentNode.getType() == RCParserTokenTypes.COMMON_RESOURCE_INFO)
        {
          convertCommonResourceInfo(currentNode, resourceElement);
          currentNode = currentNode.getNextSibling();
        }
      }

      if (currentNode != null)
      {
        if (currentNode.getType() == RCParserTokenTypes.FILE_NAME)
        {
          Element fileNameElement = new Element("data");
          resourceElement.addContent(fileNameElement);
          String filename = currentNode.getFirstChild().getText();
          if (filename.startsWith("\""))
            filename = filename.substring(1, filename.length());
          fileNameElement.setAttribute("file-name", filename);
        }
        else
        {
          // Must be raw data, e.g. single literals (string, character, integer etc.) or
          // a collection of hex numbers enclosed by single quotes.
          convertRawDataToXML(currentNode, resourceElement);
        }
      }
    }    
  }

  //------------------------------------------------------------------------------------------------
  
  /**
   * Converts a "versioninfo" entry to XML.
   * 
   * @param sourceNode The node containing the AST data to convert.
   * @param resourceElement The entry to which the new nodes must be added.
   */
  private void convertVersionInfoEntry(AST sourceNode, Element resourceElement)
  {
    resourceElement.setAttribute("type", "version-info");

    AST currentNode = sourceNode.getFirstChild();

    // Optional fixed version info part.
    if (currentNode != null)
    {
      while (currentNode.getType() == RCParserTokenTypes.VERSION_FIXED_INFO)
      {
        AST infoNode = currentNode.getFirstChild();
        Element infoElement = new Element("info-detail");
        infoElement.setAttribute("name", infoNode.getText());
        resourceElement.addContent(infoElement);
        convertExpressionList(infoNode.getFirstChild(), infoElement);

        currentNode = currentNode.getNextSibling();
      }
    }

    // Optional common resource info part.
    if (currentNode != null)
    {
      while (currentNode.getType() == RCParserTokenTypes.COMMON_RESOURCE_INFO)
      {
        convertCommonResourceInfo(currentNode, resourceElement);
        currentNode = currentNode.getNextSibling();
      }
    }
    
    // Finally the main content.
    while (currentNode != null)
    {
      switch (currentNode.getType())
      {
        case RCParserTokenTypes.STRING_FILE_INFO:
        {
          Element infoElement = new Element("string-file-info");
          resourceElement.addContent(infoElement);

          AST blockNode = currentNode.getFirstChild();
          while (blockNode != null)
          {
            Element blockElement = new Element("block");
            infoElement.addContent(blockElement);
            
            AST entryNode = blockNode.getFirstChild();
            processEntryWithEvaluationAsAttribute(entryNode, "charset", blockElement);
            entryNode = entryNode.getNextSibling();
            while (entryNode != null)
            {
              Element valueElement = new Element("value");
              blockElement.addContent(valueElement);
              
              AST valueNode = entryNode.getFirstChild();
              valueElement.setAttribute("name", convertToString(valueNode));
              valueNode = valueNode.getNextSibling();
              valueElement.setAttribute("value", convertToString(valueNode));
              
              entryNode = entryNode.getNextSibling();
            }
            
            blockNode = blockNode.getNextSibling();
          }
          break;
        }
        case RCParserTokenTypes.VAR_FILE_INFO:
        {
          Element infoElement = new Element("var-file-info");
          resourceElement.addContent(infoElement);

          AST entryNode = currentNode.getFirstChild();
          while (entryNode != null)
          {
            Element valueElement = new Element("value");
            infoElement.addContent(valueElement);
            
            AST valueNode = entryNode.getFirstChild();
            valueElement.setAttribute("name", convertToString(valueNode.getText()));
            convertExpressionList(valueNode.getNextSibling(), valueElement);
            entryNode = entryNode.getNextSibling();
          }
          break;
        }
      }
      
      currentNode = currentNode.getNextSibling();
    }
  }

  //------------------------------------------------------------------------------------------------

  /**
   * Adds a new XML node with name <b>name</b> to target. The AST node's value is added as
   * an attribute with name <b>symbol</b> and if that symbol can be evaluated to a single value
   * then this value is also added as attribute with name <b>symbol-value</b>.
   * If the current AST node does not represent a symbol then it is taken as expression, evaluated
   * and added as single attribute <b>value</b>.
   * 
   * @param node The AST node to parse.
   * @param name The name for the new XML node to create.
   * @param target The target XML node to which the new XML node must be added.
   * @return The newly created child XML node.
   */
  private Element processEntryWithEvaluation(AST node, String name, Element target)
  {
    String symbol = node.getText();
    Element element = new Element(name);
    target.addContent(element);
    if (node != null)
    {
      if (node.getType() == RCParserTokenTypes.IDENTIFIER)
      {
        element.setAttribute("symbol", symbol);
        Object symbolValue = evaluate(symbol, node.getLine(), node.getColumn());
        if (symbolValue != null)
          element.setAttribute("symbol-value", convertToString(symbolValue));
      }
      else
        if (node.getType() == RCParserTokenTypes.EXPR)
        {
          Object value = evaluate(node);
          if (value != null)
            element.setAttribute("value", convertToString(value));
          else
            element.setAttribute("value", convertExpressionToText(node.getFirstChild()));
        }
        else
        {
          // There is only a scalar value or an expression. Try to evaluate it and add the result as 
          // attribute to the new XML node. If it cannot be evaluated then add the pure text data.
          Object symbolValue = evaluate(symbol, node.getLine(), node.getColumn());
          if (symbolValue == null)
            element.setAttribute("value", symbol);
          else
            element.setAttribute("value", convertToString(symbolValue));
        }
    }

    return element;
  }

  //------------------------------------------------------------------------------------------------
  
  /**
   * This method is very similar as {@see ResourceStatement#processEntryWithEvaluation}. What is
   * different here is that the result is added as attribute to the target node.
   * 
   * @param node The AST node to parse.
   * @param name The name for the attribute to use.
   * @param target The target XML node to which the attribute is to be attached.
   */
  private void processEntryWithEvaluationAsAttribute(AST node, String name, Element target)
  {
    if (node != null)
    {
      if (node.getType() == RCParserTokenTypes.IDENTIFIER)
      {
        Object value = evaluate(node.getText(), node.getLine(), node.getColumn());
        if (value != null)
          target.setAttribute(name, convertToString(value));
        else
          target.setAttribute(name, convertExpressionToText(node.getFirstChild()));
      }
      else
        if (node.getType() == RCParserTokenTypes.EXPR)
        {
          Object value = evaluate(node);
          if (value != null)
            target.setAttribute(name, convertToString(value));
          else
            target.setAttribute(name, convertExpressionToText(node.getFirstChild()));
        }
        else
        {
          // There is only a scalar value or an expression.
          Object symbolValue = evaluate(node.getText(), node.getLine(), node.getColumn());
          if (symbolValue == null)
            target.setAttribute("value", node.getText());
          else
            target.setAttribute("value", convertToString(symbolValue));
        }
    }
  }

  //------------------------------------------------------------------------------------------------
  
  /** 
   * Conversion routine to create an XML subtree from the current AST subtree.
   * 
   * @param target The target node in the XML DOM where to add the converted data.
   */
  public void convert(Element target)
  {
    switch (getAstNode().getType())
    {
      case RCParserTokenTypes.LITER