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## org.apache.fop.datatypes
Class LengthBase

    java.lang.Object
      org.apache.fop.datatypes.LengthBase

All Implemented Interfaces:
  PercentBase

public class LengthBase
extends java.lang.Object
implements PercentBase

Models a length which can be used as a factor in a percentage length calculation

Field Summary
`static int` | `ALIGNMENT_ADJUST` constant for a alignment adjust percent-based length
`static int` | `CONTAINING_BLOCK_HEIGHT` constant for a containing block percent-based length
`static int` | `CONTAINING_BLOCK_WIDTH` constant for a containing block percent-based length
`static int` | `CONTAINING_REFAREA_WIDTH` constant for a containing refarea percent-based length
`static int` | `CUSTOM_BASE` constant for a custom percent-based length
`protected FObj` | `fobj` The FO for which this property is to be calculated.
`static int` | `FONTSIZE` constant for a font-size percent-based length
`static int` | `IMAGE_BACKGROUND_POSITION_HORIZONTAL` constant for a image background position horizontal percent-based length
`static int` | `IMAGE_BACKGROUND_POSITION_VERTICAL` constant for a image background position vertical percent-based length
`static int` | `IMAGE_INTRINSIC_HEIGHT` constant for a image intrinsic percent-based length
`static int` | `IMAGE_INTRINSIC_WIDTH` constant for a image intrinsic percent-based length
`static int` | `INH_FONTSIZE` constant for an inh font-size percent-based length
`protected static org.apache.commons.logging.Log` | `log` logging instance
`static int` | `PARENT_AREA_WIDTH` constant for a containing box percent-based length
`static int` | `TABLE_UNITS` constant for a table-unit-based length

Constructor Summary
`LengthBase(PropertyList plist, int baseType)` Constructor

Method Summary
`Length` | `getBaseLength()`
`int` | `getBaseLength(PercentBaseContext context)`
`double` | `getBaseValue()`
`int` | `getDimension()` Determines whether a numeric property is created or one with a percentage base.
`java.lang.String` | `toString()`

Methods inherited from class java.lang.Object
`clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait`

Field Detail

### CUSTOM_BASE

    public static final int CUSTOM_BASE

  constant for a custom percent-based length

  See Also:
    Constant Field Values

### FONTSIZE

    public static final int FONTSIZE

  constant for a font-size percent-based length

  See Also:
    Constant Field Values

### INH_FONTSIZE

    public static final int INH_FONTSIZE

  constant for an inh font-size percent-based length

  See Also:
    Constant Field Values

### PARENT_AREA_WIDTH

    public static final int PARENT_AREA_WIDTH

  constant for a containing box percent-based length

  See Also:
    Constant Field Values

### CONTAINING_REFAREA_WIDTH

    public static final int CONTAINING_REFAREA_WIDTH

  constant for a containing refarea percent-based length

  See Also:
    Constant Field Values

### CONTAINING_BLOCK_WIDTH

    public static final int CONTAINING_BLOCK_WIDTH

  constant for a containing block percent-based length

  See Also:
    Constant Field Values

### CONTAINING_BLOCK_HEIGHT

    public static final int CONTAINING_BLOCK_HEIGHT

  constant for a containing block percent-based length

  See Also:
    Constant Field Values

### IMAGE_INTRINSIC_WIDTH

    public static final int IMAGE_INTRINSIC_WIDTH

  constant for a image intrinsic percent-based length

  See Also:
    Constant Field Values

### IMAGE_INTRINSIC_HEIGHT

    public static final int IMAGE_INTRINSIC_HEIGHT

  constant for a image intrinsic percent-based length

  See Also:
    Constant Field Values

### IMAGE_BACKGROUND_POSITION_HORIZONTAL

    public static final int IMAGE_BACKGROUND_POSITION_HORIZONTAL

  constant for a image background position horizontal percent-based length

  See Also:
    Constant Field Values

### IMAGE_BACKGROUND_POSITION_VERTICAL

    public static final int IMAGE_BACKGROUND_POSITION_VERTICAL

  constant for a image background position vertical percent-based length

  See Also:
    Constant Field Values

### TABLE_UNITS

    public static final int TABLE_UNITS

  constant for a table-unit-based length

  See Also:
    Constant Field Values

### ALIGNMENT_ADJUST

    public static final int ALIGNMENT_ADJUST

  constant for a alignment adjust percent-based length

  See Also:
    Constant Field Values

### log

    protected static org.apache.commons.logging.Log log

  logging instance

### fobj

    protected FObj fobj

  The FO for which this property is to be calculated.

Constructor Detail

### LengthBase

    public LengthBase(PropertyList plist,
                      int baseType)
               throws PropertyException

  Constructor

Parameters:
  `plist` - property list for this
  `baseType` - a constant defining the type of teh percent base
Throws:
  `PropertyException` - In case an problem occurs while evaluating values

Method Detail

### getDimension

    public int getDimension()

  Description copied from interface: `PercentBase`
  Determines whether a numeric property is created or one with a percentage base.

  Specified by:
    `getDimension` in interface `PercentBase`
  Returns:
    the dimension of this object (always 1)

### getBaseValue

    public double getBaseValue()

  Specified by:
    `getBaseValue` in interface `PercentBase`
  Returns:
    the base value of this object (always 1.0)

### getBaseLength

    public int getBaseLength(PercentBaseContext context)
                      throws PropertyException

  Specified by:
    `getBaseLength` in interface `PercentBase`
  Parameters:
    `context` - The context for percentage evaluation
  Returns:
    the integer size in millipoints of the object (this will be used as the base to which a percentage will be applied to compute the length of the referencing item)
  Throws:
    `PropertyException` - if a problem occurs during evaluation of this value.

### toString

    public java.lang.String toString()

### getBaseLength

    public Length getBaseLength()

  Returns:
    the base length as a `Length`

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