content: /*
   * Copyright (c) 2000 World Wide Web Consortium,
   * (Massachusetts Institute of Technology, Institut National de
   * Recherche en Informatique et en Automatique, Keio University). All
   * Rights Reserved. This program is distributed under the W3C's Software
   * Intellectual Property License. This program is distributed in the
   * hope that it will be useful, but WITHOUT ANY WARRANTY; without even
   * the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
   * PURPOSE.
   * See W3C License http://www.w3.org/Consortium/Legal/ for more details.
   */
  
  package mf.org.w3c.dom.css;
  
  import mf.org.w3c.dom.DOMException;
  
  /**
   * The <code>CSSStyleDeclaration</code> interface represents a single CSS
   * declaration block. This interface may be used to determine the style
   * properties currently set in a block or to set style properties explicitly
   * within the block.
   * <p> While an implementation may not recognize all CSS properties within a
   * CSS declaration block, it is expected to provide access to all specified
   * properties in the style sheet through the <code>CSSStyleDeclaration</code>
   * interface. Furthermore, implementations that support a specific level of
   * CSS should correctly handle CSS shorthand properties for that level. For
   * a further discussion of shorthand properties, see the
   * <code>CSS2Properties</code> interface.
   * <p> This interface is also used to provide a read-only access to the
   * computed values of an element. See also the <code>ViewCSS</code>
   * interface.  The CSS Object Model doesn't provide an access to the
   * specified or actual values of the CSS cascade.
   * <p>See also the <a href='http://www.w3.org/TR/2000/REC-DOM-Level-2-Style-20001113'>Document Object Model (DOM) Level 2 Style Specification</a>.
   *
   * @since DOM Level 2
   */
  public interface CSSStyleDeclaration {
      /**
       * The parsable textual representation of the declaration block
       * (excluding the surrounding curly braces). Setting this attribute will
       * result in the parsing of the new value and resetting of all the
       * properties in the declaration block including the removal or addition
       * of properties.
       */
      String getCssText();
  
      /**
       * The parsable textual representation of the declaration block
       * (excluding the surrounding curly braces). Setting this attribute will
       * result in the parsing of the new value and resetting of all the
       * properties in the declaration block including the removal or addition
       * of properties.
       *
       * @throws DOMException SYNTAX_ERR: Raised if the specified CSS string value has a syntax
       *                      error and is unparsable.
       *                      <br>NO_MODIFICATION_ALLOWED_ERR: Raised if this declaration is
       *                      readonly or a property is readonly.
       */
      void setCssText(String cssText)
              throws DOMException;
  
      /**
       * Used to retrieve the value of a CSS property if it has been explicitly
       * set within this declaration block.
       *
       * @param propertyName The name of the CSS property. See the CSS
       *                     property index.
       * @return Returns the value of the property if it has been explicitly
       * set for this declaration block. Returns the empty string if the
       * property has not been set.
       */
      String getPropertyValue(String propertyName);
  
      /**
       * Used to retrieve the object representation of the value of a CSS
       * property if it has been explicitly set within this declaration block.
       * This method returns <code>null</code> if the property is a shorthand
       * property. Shorthand property values can only be accessed and modified
       * as strings, using the <code>getPropertyValue</code> and
       * <code>setProperty</code> methods.
       *
       * @param propertyName The name of the CSS property. See the CSS
       *                     property index.
       * @return Returns the value of the property if it has been explicitly
       * set for this declaration block. Returns <code>null</code> if the
       * property has not been set.
       */
      CSSValue getPropertyCSSValue(String propertyName);
  
      /**
       * Used to remove a CSS property if it has been explicitly set within
       * this declaration block.
       *
       * @param propertyName The name of the CSS property. See the CSS
       *                     property index.
       * @return Returns the value of the property if it has been explicitly
       * set for this declaration block. Returns the empty string if the
       * property has not been set or the property name does not correspond
       * to a known CSS property.
       * @throws DOMException NO_MODIFICATION_ALLOWED_ERR: Raised if this declaration is readonly
       *                      or the property is readonly.
       */
      String removeProperty(String propertyName)
              throws DOMException;
  
      /**
       * Used to retrieve the priority of a CSS property (e.g. the
       * <code>"important"</code> qualifier) if the priority has been
       * explicitly set in this declaration block.
       *
       * @param propertyName The name of the CSS property. See the CSS
       *                     property index.
       * @return A string representing the priority (e.g.
       * <code>"important"</code>) if the property has been explicitly set
       * in this declaration block and has a priority specified. The empty
       * string otherwise.
       */
      String getPropertyPriority(String propertyName);
  
      /**
       * Used to set a property value and priority within this declaration
       * block. <code>setProperty</code> permits to modify a property or add a
       * new one in the declaration block. Any call to this method may modify
       * the order of properties in the <code>item</code> method.
       *
       * @param propertyName The name of the CSS property. See the CSS
       *                     property index.
       * @param value        The new value of the property.
       * @param priority     The new priority of the property (e.g.
       *                     <code>"important"</code>) or the empty string if none.
       * @throws DOMException SYNTAX_ERR: Raised if the specified value has a syntax error and is
       *                      unparsable.
       *                      <br>NO_MODIFICATION_ALLOWED_ERR: Raised if this declaration is
       *                      readonly or the property is readonly.
       */
      void setProperty(String propertyName,
                       String value,
                       String priority)
              throws DOMException;
  
      /**
       * The number of properties that have been explicitly set in this
       * declaration block. The range of valid indices is 0 to length-1
       * inclusive.
       */
      int getLength();
  
      /**
       * Used to retrieve the properties that have been explicitly set in this
       * declaration block. The order of the properties retrieved using this
       * method does not have to be the order in which they were set. This
       * method can be used to iterate over all properties in this declaration
       * block.
       *
       * @param index Index of the property name to retrieve.
       * @return The name of the property at this ordinal position. The empty
       * string if no property exists at this position.
       */
      String item(int index);
  
      /**
       * The CSS rule that contains this declaration block or <code>null</code>
       * if this <code>CSSStyleDeclaration</code> is not attached to a
       * <code>CSSRule</code>.
       */
      CSSRule getParentRule();
  
  }
  