/*
 * 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 org.w3c.dom.css;

import org.w3c.dom.DOMException;

 The CSSPrimitiveValue interface represents a single CSS value
. This interface may be used to determine the value of a specific style 
property currently set in a block or to set a specific style property 
explicitly within the block. An instance of this interface might be 
obtained from the getPropertyCSSValue method of the 
CSSStyleDeclaration interface. A 
CSSPrimitiveValue object only occurs in a context of a CSS 
property. 
 Conversions are allowed between absolute values (from millimeters to 
centimeters, from degrees to radians, and so on) but not between relative 
values. (For example, a pixel value cannot be converted to a centimeter 
value.) Percentage values can't be converted since they are relative to 
the parent value (or another property value). There is one exception for 
color percentage values: since a color percentage value is relative to 
the range 0-255, a color percentage value can be converted to a number; 
(see also the RGBColor interface). 
See also the Document Object Model (DOM) Level 2 Style Specification.
Since:
DOM Level 2/**
 *  The <code>CSSPrimitiveValue</code> interface represents a single CSS value
 * . This interface may be used to determine the value of a specific style 
 * property currently set in a block or to set a specific style property 
 * explicitly within the block. An instance of this interface might be 
 * obtained from the <code>getPropertyCSSValue</code> method of the 
 * <code>CSSStyleDeclaration</code> interface. A 
 * <code>CSSPrimitiveValue</code> object only occurs in a context of a CSS 
 * property. 
 * <p> Conversions are allowed between absolute values (from millimeters to 
 * centimeters, from degrees to radians, and so on) but not between relative 
 * values. (For example, a pixel value cannot be converted to a centimeter 
 * value.) Percentage values can't be converted since they are relative to 
 * the parent value (or another property value). There is one exception for 
 * color percentage values: since a color percentage value is relative to 
 * the range 0-255, a color percentage value can be converted to a number; 
 * (see also the <code>RGBColor</code> interface). 
 * <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 CSSPrimitiveValue extends CSSValue {
    // UnitTypes
    
The value is not a recognized CSS2 value. The value can only be 
obtained by using the cssText attribute.
/**
     * The value is not a recognized CSS2 value. The value can only be 
     * obtained by using the <code>cssText</code> attribute.
     */
    public static final short CSS_UNKNOWN               = 0;
    
The value is a simple number. The value can be obtained by using the 
getFloatValue method.
/**
     * The value is a simple number. The value can be obtained by using the 
     * <code>getFloatValue</code> method.
     */
    public static final short CSS_NUMBER                = 1;
    
The value is a percentage. The value can be obtained by using the 
getFloatValue method.
/**
     * The value is a percentage. The value can be obtained by using the 
     * <code>getFloatValue</code> method.
     */
    public static final short CSS_PERCENTAGE            = 2;
    
The value is a length (ems). The value can be obtained by using the 
getFloatValue method.
/**
     * The value is a length (ems). The value can be obtained by using the 
     * <code>getFloatValue</code> method.
     */
    public static final short CSS_EMS                   = 3;
    
The value is a length (exs). The value can be obtained by using the 
getFloatValue method.
/**
     * The value is a length (exs). The value can be obtained by using the 
     * <code>getFloatValue</code> method.
     */
    public static final short CSS_EXS                   = 4;
    
The value is a length (px). The value can be obtained by using the 
getFloatValue method.
/**
     * The value is a length (px). The value can be obtained by using the 
     * <code>getFloatValue</code> method.
     */
    public static final short CSS_PX                    = 5;
    
The value is a length (cm). The value can be obtained by using the 
getFloatValue method.
/**
     * The value is a length (cm). The value can be obtained by using the 
     * <code>getFloatValue</code> method.
     */
    public static final short CSS_CM                    = 6;
    
The value is a length (mm). The value can be obtained by using the 
getFloatValue method.
/**
     * The value is a length (mm). The value can be obtained by using the 
     * <code>getFloatValue</code> method.
     */
    public static final short CSS_MM                    = 7;
    
The value is a length (in). The value can be obtained by using the 
getFloatValue method.
/**
     * The value is a length (in). The value can be obtained by using the 
     * <code>getFloatValue</code> method.
     */
    public static final short CSS_IN                    = 8;
    
The value is a length (pt). The value can be obtained by using the 
getFloatValue method.
/**
     * The value is a length (pt). The value can be obtained by using the 
     * <code>getFloatValue</code> method.
     */
    public static final short CSS_PT                    = 9;
    
The value is a length (pc). The value can be obtained by using the 
getFloatValue method.
/**
     * The value is a length (pc). The value can be obtained by using the 
     * <code>getFloatValue</code> method.
     */
    public static final short CSS_PC                    = 10;
    
The value is an angle (deg). The value can be obtained by using the 
getFloatValue method.
/**
     * The value is an angle (deg). The value can be obtained by using the 
     * <code>getFloatValue</code> method.
     */
    public static final short CSS_DEG                   = 11;
    
The value is an angle (rad). The value can be obtained by using the 
getFloatValue method.
/**
     * The value is an angle (rad). The value can be obtained by using the 
     * <code>getFloatValue</code> method.
     */
    public static final short CSS_RAD                   = 12;
    
The value is an angle (grad). The value can be obtained by using the 
getFloatValue method.
/**
     * The value is an angle (grad). The value can be obtained by using the 
     * <code>getFloatValue</code> method.
     */
    public static final short CSS_GRAD                  = 13;
    
The value is a time (ms). The value can be obtained by using the 
getFloatValue method.
/**
     * The value is a time (ms). The value can be obtained by using the 
     * <code>getFloatValue</code> method.
     */
    public static final short CSS_MS                    = 14;
    
The value is a time (s). The value can be obtained by using the 
getFloatValue method.
/**
     * The value is a time (s). The value can be obtained by using the 
     * <code>getFloatValue</code> method.
     */
    public static final short CSS_S                     = 15;
    
The value is a frequency (Hz). The value can be obtained by using the 
getFloatValue method.
/**
     * The value is a frequency (Hz). The value can be obtained by using the 
     * <code>getFloatValue</code> method.
     */
    public static final short CSS_HZ                    = 16;
    
The value is a frequency (kHz). The value can be obtained by using the 
getFloatValue method.
/**
     * The value is a frequency (kHz). The value can be obtained by using the 
     * <code>getFloatValue</code> method.
     */
    public static final short CSS_KHZ                   = 17;
    
The value is a number with an unknown dimension. The value can be 
obtained by using the getFloatValue method.
/**
     * The value is a number with an unknown dimension. The value can be 
     * obtained by using the <code>getFloatValue</code> method.
     */
    public static final short CSS_DIMENSION             = 18;
    
The value is a STRING. The value can be obtained by using the 
getStringValue method.
/**
     * The value is a STRING. The value can be obtained by using the 
     * <code>getStringValue</code> method.
     */
    public static final short CSS_STRING                = 19;
    
The value is a URI. The value can be obtained by using the 
getStringValue method.
/**
     * The value is a URI. The value can be obtained by using the 
     * <code>getStringValue</code> method.
     */
    public static final short CSS_URI                   = 20;
    
The value is an identifier. The value can be obtained by using the 
getStringValue method.
/**
     * The value is an identifier. The value can be obtained by using the 
     * <code>getStringValue</code> method.
     */
    public static final short CSS_IDENT                 = 21;
    
The value is a attribute function. The value can be obtained by using 
the getStringValue method.
/**
     * The value is a attribute function. The value can be obtained by using 
     * the <code>getStringValue</code> method.
     */
    public static final short CSS_ATTR                  = 22;
    
The value is a counter or counters function. The value can be obtained 
by using the getCounterValue method.
/**
     * The value is a counter or counters function. The value can be obtained 
     * by using the <code>getCounterValue</code> method.
     */
    public static final short CSS_COUNTER               = 23;
    
The value is a rect function. The value can be obtained by using the 
getRectValue method.
/**
     * The value is a rect function. The value can be obtained by using the 
     * <code>getRectValue</code> method.
     */
    public static final short CSS_RECT                  = 24;
    
The value is a RGB color. The value can be obtained by using the 
getRGBColorValue method.
/**
     * The value is a RGB color. The value can be obtained by using the 
     * <code>getRGBColorValue</code> method.
     */
    public static final short CSS_RGBCOLOR              = 25;

    
The type of the value as defined by the constants specified above.
/**
     * The type of the value as defined by the constants specified above.
     */
    public short getPrimitiveType();

    
 A method to set the float value with a specified unit. If the property 
attached with this value can not accept the specified unit or the 
float value, the value will be unchanged and a 
DOMException will be raised. 
Params:
unitType –  A unit code as defined above. The unit code can only 
  be a float unit type (i.e. CSS_NUMBER, 
  CSS_PERCENTAGE, CSS_EMS, 
  CSS_EXS, CSS_PX, CSS_CM, 
  CSS_MM, CSS_IN, CSS_PT, 
  CSS_PC, CSS_DEG, CSS_RAD, 
  CSS_GRAD, CSS_MS, CSS_S, 
  CSS_HZ, CSS_KHZ, 
  CSS_DIMENSION).
floatValue –  The new float value.
Throws:
DOMException – 
   INVALID_ACCESS_ERR: Raised if the attached property doesn't support 
  the float value or the unit type.
  
NO_MODIFICATION_ALLOWED_ERR: Raised if this property is readonly./**
     *  A method to set the float value with a specified unit. If the property 
     * attached with this value can not accept the specified unit or the 
     * float value, the value will be unchanged and a 
     * <code>DOMException</code> will be raised. 
     * @param unitType  A unit code as defined above. The unit code can only 
     *   be a float unit type (i.e. <code>CSS_NUMBER</code>, 
     *   <code>CSS_PERCENTAGE</code>, <code>CSS_EMS</code>, 
     *   <code>CSS_EXS</code>, <code>CSS_PX</code>, <code>CSS_CM</code>, 
     *   <code>CSS_MM</code>, <code>CSS_IN</code>, <code>CSS_PT</code>, 
     *   <code>CSS_PC</code>, <code>CSS_DEG</code>, <code>CSS_RAD</code>, 
     *   <code>CSS_GRAD</code>, <code>CSS_MS</code>, <code>CSS_S</code>, 
     *   <code>CSS_HZ</code>, <code>CSS_KHZ</code>, 
     *   <code>CSS_DIMENSION</code>). 
     * @param floatValue  The new float value. 
     * @exception DOMException
     *    INVALID_ACCESS_ERR: Raised if the attached property doesn't support 
     *   the float value or the unit type.
     *   <br>NO_MODIFICATION_ALLOWED_ERR: Raised if this property is readonly.
     */
    public void setFloatValue(short unitType, 
                              float floatValue)
                              throws DOMException;

    
 This method is used to get a float value in a specified unit. If this 
CSS value doesn't contain a float value or can't be converted into 
the specified unit, a DOMException is raised. 
Params:
unitType –  A unit code to get the float value. The unit code can 
  only be a float unit type (i.e. CSS_NUMBER, 
  CSS_PERCENTAGE, CSS_EMS, 
  CSS_EXS, CSS_PX, CSS_CM, 
  CSS_MM, CSS_IN, CSS_PT, 
  CSS_PC, CSS_DEG, CSS_RAD, 
  CSS_GRAD, CSS_MS, CSS_S, 
  CSS_HZ, CSS_KHZ, 
  CSS_DIMENSION).
Throws:
DOMException – 
   INVALID_ACCESS_ERR: Raised if the CSS value doesn't contain a float 
  value or if the float value can't be converted into the specified 
  unit.
Returns:
 The float value in the specified unit./**
     *  This method is used to get a float value in a specified unit. If this 
     * CSS value doesn't contain a float value or can't be converted into 
     * the specified unit, a <code>DOMException</code> is raised. 
     * @param unitType  A unit code to get the float value. The unit code can 
     *   only be a float unit type (i.e. <code>CSS_NUMBER</code>, 
     *   <code>CSS_PERCENTAGE</code>, <code>CSS_EMS</code>, 
     *   <code>CSS_EXS</code>, <code>CSS_PX</code>, <code>CSS_CM</code>, 
     *   <code>CSS_MM</code>, <code>CSS_IN</code>, <code>CSS_PT</code>, 
     *   <code>CSS_PC</code>, <code>CSS_DEG</code>, <code>CSS_RAD</code>, 
     *   <code>CSS_GRAD</code>, <code>CSS_MS</code>, <code>CSS_S</code>, 
     *   <code>CSS_HZ</code>, <code>CSS_KHZ</code>, 
     *   <code>CSS_DIMENSION</code>). 
     * @return  The float value in the specified unit. 
     * @exception DOMException
     *    INVALID_ACCESS_ERR: Raised if the CSS value doesn't contain a float 
     *   value or if the float value can't be converted into the specified 
     *   unit. 
     */
    public float getFloatValue(short unitType)
                               throws DOMException;

    
 A method to set the string value with the specified unit. If the 
property attached to this value can't accept the specified unit or 
the string value, the value will be unchanged and a 
DOMException will be raised. 
Params:
stringType –  A string code as defined above. The string code can 
  only be a string unit type (i.e. CSS_STRING, 
  CSS_URI, CSS_IDENT, and 
  CSS_ATTR).
stringValue –  The new string value.
Throws:
DOMException – 
   INVALID_ACCESS_ERR: Raised if the CSS value doesn't contain a string 
  value or if the string value can't be converted into the specified 
  unit.
  
NO_MODIFICATION_ALLOWED_ERR: Raised if this property is readonly./**
     *  A method to set the string value with the specified unit. If the 
     * property attached to this value can't accept the specified unit or 
     * the string value, the value will be unchanged and a 
     * <code>DOMException</code> will be raised. 
     * @param stringType  A string code as defined above. The string code can 
     *   only be a string unit type (i.e. <code>CSS_STRING</code>, 
     *   <code>CSS_URI</code>, <code>CSS_IDENT</code>, and 
     *   <code>CSS_ATTR</code>). 
     * @param stringValue  The new string value. 
     * @exception DOMException
     *    INVALID_ACCESS_ERR: Raised if the CSS value doesn't contain a string 
     *   value or if the string value can't be converted into the specified 
     *   unit.
     *   <br>NO_MODIFICATION_ALLOWED_ERR: Raised if this property is readonly.
     */
    public void setStringValue(short stringType, 
                               String stringValue)
                               throws DOMException;

    
 This method is used to get the string value. If the CSS value doesn't 
contain a string value, a DOMException is raised.  Some 
properties (like 'font-family' or 'voice-family') convert a 
whitespace separated list of idents to a string. 
Throws:
DOMException – 
   INVALID_ACCESS_ERR: Raised if the CSS value doesn't contain a string 
  value.
Returns:
 The string value in the current unit. The current 
  primitiveType can only be a string unit type (i.e. 
  CSS_STRING, CSS_URI, 
  CSS_IDENT and CSS_ATTR)./**
     *  This method is used to get the string value. If the CSS value doesn't 
     * contain a string value, a <code>DOMException</code> is raised.  Some 
     * properties (like 'font-family' or 'voice-family') convert a 
     * whitespace separated list of idents to a string. 
     * @return  The string value in the current unit. The current 
     *   <code>primitiveType</code> can only be a string unit type (i.e. 
     *   <code>CSS_STRING</code>, <code>CSS_URI</code>, 
     *   <code>CSS_IDENT</code> and <code>CSS_ATTR</code>). 
     * @exception DOMException
     *    INVALID_ACCESS_ERR: Raised if the CSS value doesn't contain a string 
     *   value. 
     */
    public String getStringValue()
                                 throws DOMException;

    
 This method is used to get the Counter value. If this CSS value 
doesn't contain a counter value, a DOMException is 
raised. Modification to the corresponding style property can be 
achieved using the Counter interface. 
Throws:
DOMException – 
   INVALID_ACCESS_ERR: Raised if the CSS value doesn't contain a 
  Counter value (e.g. this is not CSS_COUNTER).
Returns:
The Counter value./**
     *  This method is used to get the Counter value. If this CSS value 
     * doesn't contain a counter value, a <code>DOMException</code> is 
     * raised. Modification to the corresponding style property can be 
     * achieved using the <code>Counter</code> interface. 
     * @return The Counter value.
     * @exception DOMException
     *    INVALID_ACCESS_ERR: Raised if the CSS value doesn't contain a 
     *   Counter value (e.g. this is not <code>CSS_COUNTER</code>). 
     */
    public Counter getCounterValue()
                                   throws DOMException;

    
 This method is used to get the Rect value. If this CSS value doesn't 
contain a rect value, a DOMException is raised. 
Modification to the corresponding style property can be achieved 
using the Rect interface. 
Throws:
DOMException – 
   INVALID_ACCESS_ERR: Raised if the CSS value doesn't contain a Rect 
  value. (e.g. this is not CSS_RECT).
Returns:
The Rect value./**
     *  This method is used to get the Rect value. If this CSS value doesn't 
     * contain a rect value, a <code>DOMException</code> is raised. 
     * Modification to the corresponding style property can be achieved 
     * using the <code>Rect</code> interface. 
     * @return The Rect value.
     * @exception DOMException
     *    INVALID_ACCESS_ERR: Raised if the CSS value doesn't contain a Rect 
     *   value. (e.g. this is not <code>CSS_RECT</code>). 
     */
    public Rect getRectValue()
                             throws DOMException;

    
 This method is used to get the RGB color. If this CSS value doesn't 
contain a RGB color value, a DOMException is raised. 
Modification to the corresponding style property can be achieved 
using the RGBColor interface. 
Throws:
DOMException – 
   INVALID_ACCESS_ERR: Raised if the attached property can't return a 
  RGB color value (e.g. this is not CSS_RGBCOLOR).
Returns:
the RGB color value./**
     *  This method is used to get the RGB color. If this CSS value doesn't 
     * contain a RGB color value, a <code>DOMException</code> is raised. 
     * Modification to the corresponding style property can be achieved 
     * using the <code>RGBColor</code> interface. 
     * @return the RGB color value.
     * @exception DOMException
     *    INVALID_ACCESS_ERR: Raised if the attached property can't return a 
     *   RGB color value (e.g. this is not <code>CSS_RGBCOLOR</code>). 
     */
    public RGBColor getRGBColorValue()
                                     throws DOMException;

}