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## org.apache.fop.area
Class MainReference

    java.lang.Object
      org.apache.fop.area.AreaTreeObject
          org.apache.fop.area.Area
              org.apache.fop.area.MainReference

All Implemented Interfaces:
  java.io.Serializable, java.lang.Cloneable

    public class MainReference

extends Area

The main-reference-area generated by an fo:region-body This object holds one or more span-reference-areas (block-areas stacked in the block progression direction) See fo:region-body definition in the XSL Rec for more information.

See Also:
  Serialized Form

Field Summary

Fields inherited from class org.apache.fop.area.Area
`bidiLevel, bpd, CLASS_ABSOLUTE, CLASS_BEFORE_FLOAT, CLASS_FIXED, CLASS_FOOTNOTE, CLASS_MAX, CLASS_NORMAL, CLASS_SIDE_FLOAT, effectiveIPD, ipd, log, ORIENT_0, ORIENT_180, ORIENT_270, ORIENT_90, traits`

Fields inherited from class org.apache.fop.area.AreaTreeObject
`extensionAttachments, foreignAttributes`

Constructor Summary
`MainReference(BodyRegion parent)` Constructor

Method Summary
`Span` | `createSpan(boolean spanAll)` Add a span area to this area.
`int` | `getColumnCount()`
`int` | `getColumnGap()`
`Span` | `getCurrentSpan()` Get the span area currently being filled (i.e., the last span created).
`java.util.List<Span>` | `getSpans()` Get the span areas from this area.
`boolean` | `isEmpty()` Indicates whether any child areas have been added to this reference area.
`void` | `setSpans(java.util.List<Span> spans)` Do not use.
`void` | `setWritingModeTraits(WritingModeTraitsGetter wmtg)` Sets the writing mode traits for the spans of this main reference area.

Methods inherited from class org.apache.fop.area.Area
`activateEffectiveIPD, addChildArea, addTrait, clone, getAllocBPD, getAllocIPD, getAreaClass, getBidiLevel, getBorderAndPaddingWidthAfter, getBorderAndPaddingWidthBefore, getBorderAndPaddingWidthEnd, getBorderAndPaddingWidthStart, getBPD, getEffectiveAllocIPD, getEffectiveIPD, getIPD, getSpaceAfter, getSpaceBefore, getSpaceEnd, getSpaceStart, getTrait, getTraitAsBoolean, getTraitAsInteger, getTraits, hasTrait, hasTraits, resetBidiLevel, setAreaClass, setBidiLevel, setBPD, setIPD, setTraits, toString`

Methods inherited from class org.apache.fop.area.AreaTreeObject
`addExtensionAttachment, getExtensionAttachments, getForeignAttributes, getForeignAttributeValue, hasExtensionAttachments, setExtensionAttachments, setForeignAttribute, setForeignAttributes`

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

Constructor Detail

### MainReference

    public MainReference(BodyRegion parent)

  Constructor

  Parameters:
    `parent` - the body region this reference area is placed in.

Method Detail

### createSpan

    public Span createSpan(boolean spanAll)

  Add a span area to this area.

  Parameters:
    `spanAll` - whether to make a single-column span
  Returns:
    the created span area.

### getSpans

    public java.util.List<Span> getSpans()

  Get the span areas from this area.

  Returns:
    the list of span areas

### setSpans

    public void setSpans(java.util.List<Span> spans)

  Do not use. Used to handle special page-master for last page: transfer the content that had already been added to a normal page to this main reference for the last page. TODO this is hacky.

  Parameters:
    `spans` - content already laid out

### getCurrentSpan

    public Span getCurrentSpan()

  Get the span area currently being filled (i.e., the last span created).

  Returns:
    the active span.

### isEmpty

    public boolean isEmpty()

  Indicates whether any child areas have been added to this reference area. This is achieved by looping through each span.

  Returns:
    true if no child areas have been added yet.

### getColumnCount

    public int getColumnCount()

  Returns:
    the number of columns

### getColumnGap

    public int getColumnGap()

  Returns:
    the column gap in millipoints

### setWritingModeTraits

    public void setWritingModeTraits(WritingModeTraitsGetter wmtg)

  Sets the writing mode traits for the spans of this main reference area.

  Overrides:
    `setWritingModeTraits` in class `Area`
  Parameters:
    `wmtg` - a WM traits getter

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