org.foray.area
Class MainRA

java.lang.Object
  org.foray.common.AbstractOrderedTreeNode
      org.foray.area.AreaNode
          org.foray.area.Area
              org.foray.area.AreaFixed
                  org.foray.area.MainRA

All Implemented Interfaces:

Iterable<org.axsl.galley.AreaNode>, TreeNode, org.axsl.area.Area, org.axsl.area.AreaNode, org.axsl.area.MainRefArea, org.axsl.fo.FoContext, org.axsl.galley.MainReferenceArea, OrderedTreeNode

public final class MainRA
extends AreaFixed
implements org.axsl.galley.MainReferenceArea, org.axsl.area.MainRefArea

Manages the main-reference-area. Its parent should always be an instance of RegionRABody, and its children should always be instances of SpanRA.

Nested Class Summary

Nested classes/interfaces inherited from class org.foray.common.AbstractOrderedTreeNode

AbstractOrderedTreeNode.PostOrderDescendantIterator

Method Summary

NormalFlowRA	addSpanArea(int numColumns) Add a new span area with specified number of column areas.
org.axsl.common.value.RelativeAxis	contentStackingAxis() Returns the content stacking axis for this area.
int	crBpd()
int	crIpd()
int	crOriginBPDOffset() The difference, in millipoints, between the page-viewport-area's before-edge and this Area's content-rectangle before-edge.
int	crOriginIPDOffset() The difference, in millipoints, between the page-viewport-area's start-edge and this Area's content-rectangle start-edge.
String	getAreaName()
List<AreaNode>	getChildren() Return the List of this node's children.
NormalFlowRA	getCurrentColumnArea() Returns the current column area.
FOLinkage	getLinkage() Returns the raw "generated by" instance.
NormalFlowRA	getNormalFlow(org.axsl.fo.Fo fo)
Area	getOverflowArea(Area childRequesting) This method is used by child Areas to ask the parent Area into which Area the child Area's overflow should be placed.
AreaNode	getParent()
boolean	isBalancingRequired(org.axsl.fo.Fo fo) This almost does what getNewArea() does, without actually returning an area.
boolean	isLastColumn() Used in Flow when layout returns incomplete.
boolean	isNewSpanArea() This variable is unset by getNextArea(), is set by addSpanArea(), and may be set by resetSpanArea().
SpanRA	makeSpanArea(int numColumns) Creates a new span area in this main reference area.
protected boolean	optimize() This method should be run after layout is complete, allowing cleanup and adjustments that do not affect the placement of the areas to be computed before the page is rendered.
void	render(org.axsl.galley.RenderVisitor visitor)
void	resetSpanArea() This is where the balancing algorithm lives, or gets called.
void	setParent(AreaNode node) Sets the parent node.
int	traitBorderAfterWidth() Returns the border-after-width trait for this area.
int	traitBorderBeforeWidth() Returns the border-before-width trait for this area.
int	traitBorderEndWidth() Returns the border-end-width trait for this area.
int	traitBorderStartWidth() Returns the border-start-width trait for this area.
int	traitColumnCount() Returns the number of columns in this area.
int	traitColumnGap() Returns the column gap, in millipoints, for this area.
int	traitEndIndent() Returns the end-indent trait.
org.axsl.fo.fo.RegionBody	traitGeneratedBy()
int	traitPaddingAfter() Returns the padding-after trait for this area.
int	traitPaddingBefore() Returns the padding-before trait for this area.
int	traitPaddingEnd() Returns the padding-end trait for this area.
int	traitPaddingStart() Returns the padding-start trait for this area.
int	traitSpaceAfterOptimum() Returns the space-after optimum trait for this area.
int	traitSpaceBeforeOptimum() Returns the space-before optimum trait for this area.
int	traitSpaceEndOptimum() Returns the space-end optimum trait for this area.
int	traitSpaceStartOptimum() Returns the space-start optimum trait for this area.
int	traitStartIndent() Returns the start-indent trait.

Methods inherited from class org.foray.area.AreaFixed

getProgressionDimension, incrementProgressionDimension, isAbsolutelyPositioned, pdAvailable, pdUsedBySiblings, setMinimumProgressionDimension, setProgressionDimension

Methods inherited from class org.foray.area.Area

brBpd, brIpd, brOriginBPDOffset, brOriginIPDOffset, brOriginX, brOriginY, brPoints, contentStackingAxisAbsolute, contentStackingDirectionAbsolute, crOriginX, crOriginY, crPoints, destinationName, generatedByExists, generatedByName, getAreaParent, getBPAxis, getFontWritingMode, getIPAxis, getNearestAncestorAreaContainer, getWritingMode, hasFenceFollowing, hasFencePreceding, isBlockArea, isFirstChildOfParent, isInNormalFlow, isLastChildOfParent, isLinkRoot, larBPD, larIPD, larOriginX, larOriginY, linkDestination, linkType, narBPD, narIPD, narOriginX, narOriginY, nearestArea, parentAllocationWidth, prBpd, prIpd, prOriginBPDOffset, prOriginIPDOffset, prOriginX, prOriginY, referenceOrientationCumulative, shouldAdjustParentPD, traitAreaClass, traitId, traitIsFirst, traitIsLast, traitIsReferenceArea, traitWhiteSpaceTreatment

Methods inherited from class org.foray.area.AreaNode

ancestorArea, ancestorBlockAreaNotALineArea, ancestorBlockContentFactory, ancestorBlockOrRa, ancestorGeneratedByBlockLevelFO, ancestorLineArea, ancestorNormalBlockArea, ancestorPageCollection, ancestorReferenceArea, ancestorSpanRA, ancestorTableArea, bpdAncestorBlockOrRa, getAllowsChildren, getAreaTree, getChildAt, getColor, getContainingReferenceArea, getFirstAreaChild, getFirstChild, getGalley, getGraftingPoint, getLastAreaChild, getLastChild, getLogger, getNextChildOfGeneratedBy, getNextSiblingArea, getNormalLinkage, getNormalLinkage, getOrderedParent, getPage, getPreviousChildOfGeneratedBy, getPreviousSiblingArea, getSiblings, hasUnresolvedRefId, heightContainingBlock, ipdAncestorBlockArea, ipdAncestorBlockOrRa, ipdContainingRefArea, ipdParentArea, isFirst, isFirstChildOfGeneratedBy, isGeneratedByBlockLevelFo, isLast, isLastChildOfGeneratedBy, iterator, linkage, nearestBeforeFloatArea, nearestFootnoteArea, nearestGeneratedByBlockLevelFo, nearestNormalBlockArea, nearestTableArea, optimizeChildren, registerWithLinkage, remove, removeChild, tableWidth, widthContainingBlock

Methods inherited from class org.foray.common.AbstractOrderedTreeNode

children, getChildCount, getFirstLeaf, getIndex, getLastLeaf, getLevel, getNextLeaf, getNextSibling, getPreviousLeaf, getPreviousSibling, getSharedAncestor, hasChildren, isLeaf, isNodeAncestor, isNodeDescendant, nextPostOrderNode, nextPreOrderNode, postOrderDescendantIterator, siblingIndex

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface org.axsl.galley.Area

brBpd, brIpd, brOriginX, brOriginY, crOriginX, crOriginY, destinationName, generatedByExists, generatedByName, isLinkRoot, linkDestination, linkType, traitId

Methods inherited from interface org.axsl.galley.AreaNode

getChildAt, getGalley

Methods inherited from interface java.lang.Iterable

iterator

Methods inherited from interface org.axsl.area.Area

pdAvailable

Methods inherited from interface org.axsl.area.AreaNode

ancestorArea, ancestorBlockContentFactory, ancestorNormalBlockArea, ancestorTableArea, getAreaTree, getPage, isFirstChildOfGeneratedBy, nearestArea, nearestGeneratedByBlockLevelFo, removeChild, siblingIndex

Methods inherited from interface javax.swing.tree.TreeNode

children, getAllowsChildren, getChildCount, getIndex, isLeaf

Methods inherited from interface org.axsl.fo.FoContext

bpdAncestorBlockOrRa, getGraftingPoint, heightContainingBlock, ipdAncestorBlockArea, ipdAncestorBlockOrRa, ipdContainingRefArea, ipdParentArea, isFirst, isLast, tableWidth, widthContainingBlock

Method Detail

getNormalFlow

public NormalFlowRA getNormalFlow(org.axsl.fo.Fo fo)
                           throws org.axsl.area.AreaTreeException

Specified by:

getNormalFlow in interface org.axsl.area.MainRefArea

Throws:

org.axsl.area.AreaTreeException

addSpanArea

public NormalFlowRA addSpanArea(int numColumns)

Add a new span area with specified number of column areas.

Parameters:

numColumns - The number of columns in the new span area.

Returns:

The next normal flow area.

makeSpanArea

public SpanRA makeSpanArea(int numColumns)

Creates a new span area in this main reference area.

Parameters:

numColumns - The number of columns in the new span area.

Returns:

The new span area.

isBalancingRequired

public boolean isBalancingRequired(org.axsl.fo.Fo fo)

This almost does what getNewArea() does, without actually returning an area. These 2 methods can be reworked.

Specified by:

isBalancingRequired in interface org.axsl.area.MainRefArea

Parameters:

fo - The next formatting object

Returns:

boolean True if we need to balance.

resetSpanArea

public void resetSpanArea()

This is where the balancing algorithm lives, or gets called. Right now it's primitive: get the total content height in all columns, divide by the column count, and add a heuristic safety factor. Then the previous (unbalanced) span area is removed, and a new one added with the computed max height.

Specified by:

resetSpanArea in interface org.axsl.area.MainRefArea

isLastColumn

public boolean isLastColumn()

Used in Flow when layout returns incomplete.

Specified by:

isLastColumn in interface org.axsl.area.MainRefArea

Returns:

boolean Is this the last column in this span?

isNewSpanArea

public boolean isNewSpanArea()

This variable is unset by getNextArea(), is set by addSpanArea(), and may be set by resetSpanArea().

Specified by:

isNewSpanArea in interface org.axsl.area.MainRefArea

Returns:

boolean Is the span area new or not?

getCurrentColumnArea

public NormalFlowRA getCurrentColumnArea()

Returns the current column area.

Returns:

The current column area.

crBpd

public int crBpd()

Specified by:

crBpd in interface org.axsl.area.Area

Specified by:

crBpd in class Area

crIpd

public int crIpd()

Specified by:

crIpd in interface org.axsl.area.Area

Specified by:

crIpd in class Area

crOriginIPDOffset

public int crOriginIPDOffset()

Description copied from class: Area

The difference, in millipoints, between the page-viewport-area's start-edge and this Area's content-rectangle start-edge. This assumes for now that the IP Direction is the same for all areas.

Specified by:

crOriginIPDOffset in class Area

Returns:

The IPD offset of the content rectangle.

crOriginBPDOffset

public int crOriginBPDOffset()

Description copied from class: Area

The difference, in millipoints, between the page-viewport-area's before-edge and this Area's content-rectangle before-edge. This assumes for now that the BP Direction is the same for all areas.

Specified by:

crOriginBPDOffset in class Area

Returns:

The BPD offset of the content rectangle.

getOverflowArea

public Area getOverflowArea(Area childRequesting)
                     throws org.axsl.area.AreaTreeException

Description copied from class: Area

This method is used by child Areas to ask the parent Area into which Area the child Area's overflow should be placed. Overflows start when a new LineArea cannot be create for the current BlockArea. General strategy for overflow is to recursively go up the tree until getting to any Area that knows how to solve the overflow. One general case is the page-reference-area, which should know how to create a new page.

Specified by:

getOverflowArea in class Area

Parameters:

childRequesting - Child Areas ask

Returns:

The younger sister Area that should be used to handle the overflow condition.

Throws:

org.axsl.area.AreaTreeException - If the Area is unable to find or create the overflow area.

traitColumnCount

public int traitColumnCount()

Returns the number of columns in this area.

Returns:

The number of columns in this area.

traitColumnGap

public int traitColumnGap()

Returns the column gap, in millipoints, for this area.

Returns:

The column gap, in millipoints, for this area.

getAreaName

public String getAreaName()

Specified by:

getAreaName in interface org.axsl.area.AreaNode

render

public void render(org.axsl.galley.RenderVisitor visitor)
            throws org.axsl.galley.GalleyVisitorException

Throws:

org.axsl.galley.GalleyVisitorException

contentStackingAxis

public org.axsl.common.value.RelativeAxis contentStackingAxis()

Description copied from class: Area

Returns the content stacking axis for this area.

Specified by:

contentStackingAxis in class Area

Returns:

Either RelativeAxis.BLOCK_PROGRESSION or RelativeAxis.INLINE_PROGRESSION, depending on whether the contents of this area stack in the block-progression-direction or the inline-progression-direction. The default value is that contents stack in the BPD. Classes that stack in the IPD should override this method.

getParent

public AreaNode getParent()

Specified by:

getParent in interface TreeNode

Specified by:

getParent in class AreaNode

setParent

public void setParent(AreaNode node)
               throws org.axsl.area.AreaTreeException

Description copied from class: AreaNode

Sets the parent node.

Specified by:

setParent in class AreaNode

Parameters:

node - The new parent node.

Throws:

org.axsl.area.AreaTreeException - If the parent node is not compatible with the implementations specification for a parent node.

getChildren

public List<AreaNode> getChildren()

Description copied from class: AbstractOrderedTreeNode

Return the List of this node's children.

Specified by:

getChildren in class AreaFixed

Returns:

The List of this node's children.

optimize

protected boolean optimize()

Description copied from class: AreaNode

This method should be run after layout is complete, allowing cleanup and adjustments that do not affect the placement of the areas to be computed before the page is rendered. For example, empty areas should be removed. Also classes like LineArea can use this to adjust word-spacing and other variables. NOTE: This method is called recursively by each node. The process starts at PageRA.layoutComplete().

Specified by:

optimize in class AreaNode

Returns:

True iff the Area node thinks it should be removed.

getLinkage

public FOLinkage getLinkage()

Description copied from class: AreaNode

Returns the raw "generated by" instance.

Specified by:

getLinkage in class AreaNode

Returns:

The raw linkage item.

traitGeneratedBy

public org.axsl.fo.fo.RegionBody traitGeneratedBy()

Specified by:

traitGeneratedBy in interface org.axsl.area.AreaNode

Specified by:

traitGeneratedBy in class AreaNode

traitBorderStartWidth

public int traitBorderStartWidth()

Description copied from class: Area

Returns the border-start-width trait for this area.

Specified by:

traitBorderStartWidth in class Area

Returns:

The border-start-width trait for this area.

traitBorderEndWidth

public int traitBorderEndWidth()

Description copied from class: Area

Returns the border-end-width trait for this area.

Specified by:

traitBorderEndWidth in class Area

Returns:

The border-end-width trait for this area.

traitBorderBeforeWidth

public int traitBorderBeforeWidth()

Description copied from class: Area

Returns the border-before-width trait for this area.

Specified by:

traitBorderBeforeWidth in class Area

Returns:

The border-before-width trait for this area.

traitBorderAfterWidth

public int traitBorderAfterWidth()

Description copied from class: Area

Returns the border-after-width trait for this area.

Specified by:

traitBorderAfterWidth in class Area

Returns:

The border-after-width trait for this area.

traitPaddingStart

public int traitPaddingStart()

Description copied from class: Area

Returns the padding-start trait for this area.

Specified by:

traitPaddingStart in class Area

Returns:

The padding-start trait for this area.

traitPaddingEnd

public int traitPaddingEnd()

Description copied from class: Area

Returns the padding-end trait for this area.

Specified by:

traitPaddingEnd in class Area

Returns:

The padding-end trait for this area.

traitPaddingBefore

public int traitPaddingBefore()

Description copied from class: Area

Returns the padding-before trait for this area.

Specified by:

traitPaddingBefore in class Area

Returns:

The padding-before trait for this area.

traitPaddingAfter

public int traitPaddingAfter()

Description copied from class: Area

Returns the padding-after trait for this area.

Specified by:

traitPaddingAfter in class Area

Returns:

The padding-after trait for this area.

traitSpaceBeforeOptimum

public int traitSpaceBeforeOptimum()

Description copied from class: Area

Returns the space-before optimum trait for this area.

Specified by:

traitSpaceBeforeOptimum in class Area

Returns:

The space-before optimum trait for this area.

traitSpaceAfterOptimum

public int traitSpaceAfterOptimum()

Description copied from class: Area

Returns the space-after optimum trait for this area.

Specified by:

traitSpaceAfterOptimum in class Area

Returns:

The space-after optimum trait for this area.

traitEndIndent

public int traitEndIndent()

Description copied from class: Area

Returns the end-indent trait.

Specified by:

traitEndIndent in class Area

Returns:

The end-indent trait.

traitStartIndent

public int traitStartIndent()

Description copied from class: Area

Returns the start-indent trait.

Specified by:

traitStartIndent in class Area

Returns:

The start-indent trait.

traitSpaceStartOptimum

public int traitSpaceStartOptimum()

Description copied from class: Area

Returns the space-start optimum trait for this area.

Specified by:

traitSpaceStartOptimum in class Area

Returns:

The space-start optimum trait for this area.

traitSpaceEndOptimum

public int traitSpaceEndOptimum()

Description copied from class: Area

Returns the space-end optimum trait for this area.

Specified by:

traitSpaceEndOptimum in class Area

Returns:

The space-end optimum trait for this area.