org.apache.fop.fo.flow

Class BlockContainer

java.lang.Object

org.apache.fop.fo.FONode

org.apache.fop.fo.FObj

org.apache.fop.fo.flow.BlockContainer

All Implemented Interfaces:

java.lang.Cloneable, Constants, BreakPropertySet

public class BlockContainer
extends FObj
implements BreakPropertySet

Class modelling the fo:block-container object.

Nested Class Summary

Nested classes/interfaces inherited from class org.apache.fop.fo.FObj

FObj.FObjIterator

Nested classes/interfaces inherited from class org.apache.fop.fo.FONode

FONode.FONodeIterator

Field Summary

Fields inherited from class org.apache.fop.fo.FObj

firstChild

Fields inherited from class org.apache.fop.fo.FONode

FO_URI, FOX_URI, locator, log, parent, siblings

Fields inherited from interface org.apache.fop.fo.Constants

COMPOUND_COUNT, COMPOUND_MASK, COMPOUND_SHIFT, CP_BLOCK_PROGRESSION_DIRECTION, CP_CONDITIONALITY, CP_INLINE_PROGRESSION_DIRECTION, CP_LENGTH, CP_MAXIMUM, CP_MINIMUM, CP_OPTIMUM, CP_PRECEDENCE, CP_WITHIN_COLUMN, CP_WITHIN_LINE, CP_WITHIN_PAGE, EN_100, EN_200, EN_300, EN_400, EN_500, EN_600, EN_700, EN_800, EN_900, EN_ABSOLUTE, EN_ABSOLUTE_COLORMETRIC, EN_AFTER, EN_AFTER_EDGE, EN_ALL, EN_ALPHABETIC, EN_ALWAYS, EN_ANY, EN_AUTO, EN_AUTO_EVEN, EN_AUTO_ODD, EN_AVOID, EN_BACKSLANT, EN_BASELINE, EN_BEFORE, EN_BEFORE_EDGE, EN_BIDI_OVERRIDE, EN_BLANK, EN_BLINK, EN_BLOCK, EN_BOLDER, EN_BOTH, EN_BOTTOM, EN_BOUNDED_IN_ONE_DIMENSION, EN_CAPITALIZE, EN_CAPTION, EN_CENTER, EN_CENTRAL, EN_CHARACTER_BY_CHARACTER, EN_COLLAPSE, EN_COLLAPSE_WITH_PRECEDENCE, EN_COLUMN, EN_CONDENSED, EN_CONSIDER_SHIFTS, EN_DASHED, EN_DISCARD, EN_DISREGARD_SHIFTS, EN_DOCUMENT, EN_DOTS, EN_DOTTED, EN_DOUBLE, EN_EMBED, EN_END, EN_END_ON_EVEN, EN_END_ON_ODD, EN_ERROR_IF_OVERFLOW, EN_EVEN, EN_EVEN_PAGE, EN_EXPANDED, EN_EXTRA_CONDENSED, EN_EXTRA_EXPANDED, EN_FALSE, EN_FIC, EN_FIRST, EN_FIXED, EN_FONT_HEIGHT, EN_FORCE, EN_FSWP, EN_GROOVE, EN_HANGING, EN_HIDDEN, EN_HIDE, EN_ICON, EN_IDEOGRAPHIC, EN_IGNORE, EN_IGNORE_IF_AFTER_LINEFEED, EN_IGNORE_IF_BEFORE_LINEFEED, EN_IGNORE_IF_SURROUNDING_LINEFEED, EN_INDEFINITE, EN_INDENT, EN_INHERIT, EN_INSET, EN_INSIDE, EN_INTEGER_PIXELS, EN_ITALIC, EN_JUSTIFY, EN_LARGER, EN_LAST, EN_LEFT, EN_LEWP, EN_LIGHTER, EN_LINE, EN_LINE_HEIGHT, EN_LINE_THROUGH, EN_LOWERCASE, EN_LR_TB, EN_LSWP, EN_LTR, EN_MATHEMATICAL, EN_MAX_HEIGHT, EN_MENU, EN_MESSAGE_BOX, EN_MIDDLE, EN_NARROWER, EN_NO_BLINK, EN_NO_CHANGE, EN_NO_FORCE, EN_NO_LIMIT, EN_NO_LINE_THROUGH, EN_NO_OVERLINE, EN_NO_UNDERLINE, EN_NO_WRAP, EN_NON_UNIFORM, EN_NONE, EN_NOREPEAT, EN_NORMAL, EN_NOT_BLANK, EN_OBLIQUE, EN_ODD, EN_ODD_PAGE, EN_ONLY, EN_OUTSET, EN_OUTSIDE, EN_OVERLINE, EN_PAGE, EN_PAGE_SEQUENCE, EN_PAGINATE, EN_PERCEPTUAL, EN_PRE, EN_PRESERVE, EN_REFERENCE_AREA, EN_RELATIVE, EN_RELATIVE_COLOMETRIC, EN_REPEAT, EN_REPEATX, EN_REPEATY, EN_RESAMPLE_ANY_METHOD, EN_RESET_SIZE, EN_REST, EN_RETAIN, EN_RIDGE, EN_RIGHT, EN_RL_TB, EN_RTL, EN_RULE, EN_SATURATION, EN_SCALE_DOWN_TO_FIT, EN_SCALE_TO_FIT, EN_SCALE_UP_TO_FIT, EN_SCROLL, EN_SEMI_CONDENSED, EN_SEMI_EXPANDED, EN_SEPARATE, EN_SHOW, EN_SMALL_CAPS, EN_SMALL_CAPTION, EN_SMALLER, EN_SOLID, EN_SPACE, EN_START, EN_STATIC, EN_STATUS_BAR, EN_SUB, EN_SUPER, EN_SUPPRESS, EN_TB_RL, EN_TEXT_AFTER_EDGE, EN_TEXT_BEFORE_EDGE, EN_TEXT_BOTTOM, EN_TEXT_TOP, EN_TOP, EN_TRADITIONAL, EN_TREAT_AS_SPACE, EN_TREAT_AS_ZERO_WIDTH_SPACE, EN_TRUE, EN_ULTRA_CONDENSED, EN_ULTRA_EXPANDED, EN_UNBOUNDED, EN_UNDERLINE, EN_UNIFORM, EN_UPPERCASE, EN_USE_FONT_METRICS, EN_USE_SCRIPT, EN_USECONTENT, EN_VISIBLE, EN_WIDER, EN_WRAP, EN_X_DISTRIBUTE, EN_X_FILL, ENUM_COUNT, FO_BASIC_LINK, FO_BIDI_OVERRIDE, FO_BLOCK, FO_BLOCK_CONTAINER, FO_BOOKMARK, FO_BOOKMARK_TITLE, FO_BOOKMARK_TREE, FO_CHARACTER, FO_COLOR_PROFILE, FO_CONDITIONAL_PAGE_MASTER_REFERENCE, FO_DECLARATIONS, FO_EXTERNAL_GRAPHIC, FO_FLOAT, FO_FLOW, FO_FOOTNOTE, FO_FOOTNOTE_BODY, FO_INITIAL_PROPERTY_SET, FO_INLINE, FO_INLINE_CONTAINER, FO_INSTREAM_FOREIGN_OBJECT, FO_LAYOUT_MASTER_SET, FO_LEADER, FO_LIST_BLOCK, FO_LIST_ITEM, FO_LIST_ITEM_BODY, FO_LIST_ITEM_LABEL, FO_MARKER, FO_MULTI_CASE, FO_MULTI_PROPERTIES, FO_MULTI_PROPERTY_SET, FO_MULTI_SWITCH, FO_MULTI_TOGGLE, FO_PAGE_NUMBER, FO_PAGE_NUMBER_CITATION, FO_PAGE_NUMBER_CITATION_LAST, FO_PAGE_SEQUENCE, FO_PAGE_SEQUENCE_MASTER, FO_PAGE_SEQUENCE_WRAPPER, FO_REGION_AFTER, FO_REGION_BEFORE, FO_REGION_BODY, FO_REGION_END, FO_REGION_START, FO_REPEATABLE_PAGE_MASTER_ALTERNATIVES, FO_REPEATABLE_PAGE_MASTER_REFERENCE, FO_RETRIEVE_MARKER, FO_ROOT, FO_SIMPLE_PAGE_MASTER, FO_SINGLE_PAGE_MASTER_REFERENCE, FO_STATIC_CONTENT, FO_TABLE, FO_TABLE_AND_CAPTION, FO_TABLE_BODY, FO_TABLE_CAPTION, FO_TABLE_CELL, FO_TABLE_COLUMN, FO_TABLE_FOOTER, FO_TABLE_HEADER, FO_TABLE_ROW, FO_TITLE, FO_UNKNOWN_NODE, FO_WRAPPER, FRM_OBJ_COUNT, NOT_SET, PR_ABSOLUTE_POSITION, PR_ACTIVE_STATE, PR_ALIGNMENT_ADJUST, PR_ALIGNMENT_BASELINE, PR_AUTO_RESTORE, PR_AZIMUTH, PR_BACKGROUND, PR_BACKGROUND_ATTACHMENT, PR_BACKGROUND_COLOR, PR_BACKGROUND_IMAGE, PR_BACKGROUND_POSITION, PR_BACKGROUND_POSITION_HORIZONTAL, PR_BACKGROUND_POSITION_VERTICAL, PR_BACKGROUND_REPEAT, PR_BASELINE_SHIFT, PR_BLANK_OR_NOT_BLANK, PR_BLOCK_PROGRESSION_DIMENSION, PR_BORDER, PR_BORDER_AFTER_COLOR, PR_BORDER_AFTER_PRECEDENCE, PR_BORDER_AFTER_STYLE, PR_BORDER_AFTER_WIDTH, PR_BORDER_BEFORE_COLOR, PR_BORDER_BEFORE_PRECEDENCE, PR_BORDER_BEFORE_STYLE, PR_BORDER_BEFORE_WIDTH, PR_BORDER_BOTTOM, PR_BORDER_BOTTOM_COLOR, PR_BORDER_BOTTOM_STYLE, PR_BORDER_BOTTOM_WIDTH, PR_BORDER_COLLAPSE, PR_BORDER_COLOR, PR_BORDER_END_COLOR, PR_BORDER_END_PRECEDENCE, PR_BORDER_END_STYLE, PR_BORDER_END_WIDTH, PR_BORDER_LEFT, PR_BORDER_LEFT_COLOR, PR_BORDER_LEFT_STYLE, PR_BORDER_LEFT_WIDTH, PR_BORDER_RIGHT, PR_BORDER_RIGHT_COLOR, PR_BORDER_RIGHT_STYLE, PR_BORDER_RIGHT_WIDTH, PR_BORDER_SEPARATION, PR_BORDER_SPACING, PR_BORDER_START_COLOR, PR_BORDER_START_PRECEDENCE, PR_BORDER_START_STYLE, PR_BORDER_START_WIDTH, PR_BORDER_STYLE, PR_BORDER_TOP, PR_BORDER_TOP_COLOR, PR_BORDER_TOP_STYLE, PR_BORDER_TOP_WIDTH, PR_BORDER_WIDTH, PR_BOTTOM, PR_BREAK_AFTER, PR_BREAK_BEFORE, PR_CAPTION_SIDE, PR_CASE_NAME, PR_CASE_TITLE, PR_CHARACTER, PR_CLEAR, PR_CLIP, PR_COLOR, PR_COLOR_PROFILE_NAME, PR_COLUMN_COUNT, PR_COLUMN_GAP, PR_COLUMN_NUMBER, PR_COLUMN_WIDTH, PR_CONTENT_HEIGHT, PR_CONTENT_TYPE, PR_CONTENT_WIDTH, PR_COUNTRY, PR_CUE, PR_CUE_AFTER, PR_CUE_BEFORE, PR_DESTINATION_PLACEMENT_OFFSET, PR_DIRECTION, PR_DISPLAY_ALIGN, PR_DOMINANT_BASELINE, PR_ELEVATION, PR_EMPTY_CELLS, PR_END_INDENT, PR_ENDS_ROW, PR_EXTENT, PR_EXTERNAL_DESTINATION, PR_FLOAT, PR_FLOW_NAME, PR_FONT, PR_FONT_FAMILY, PR_FONT_SELECTION_STRATEGY, PR_FONT_SIZE, PR_FONT_SIZE_ADJUST, PR_FONT_STRETCH, PR_FONT_STYLE, PR_FONT_VARIANT, PR_FONT_WEIGHT, PR_FORCE_PAGE_COUNT, PR_FORMAT, PR_GLYPH_ORIENTATION_HORIZONTAL, PR_GLYPH_ORIENTATION_VERTICAL, PR_GROUPING_SEPARATOR, PR_GROUPING_SIZE, PR_HEIGHT, PR_HYPHENATE, PR_HYPHENATION_CHARACTER, PR_HYPHENATION_KEEP, PR_HYPHENATION_LADDER_COUNT, PR_HYPHENATION_PUSH_CHARACTER_COUNT, PR_HYPHENATION_REMAIN_CHARACTER_COUNT, PR_ID, PR_INDEX_CLASS, PR_INDEX_KEY, PR_INDICATE_DESTINATION, PR_INITIAL_PAGE_NUMBER, PR_INLINE_PROGRESSION_DIMENSION, PR_INTERNAL_DESTINATION, PR_INTRUSION_DISPLACE, PR_KEEP_TOGETHER, PR_KEEP_WITH_NEXT, PR_KEEP_WITH_PREVIOUS, PR_LANGUAGE, PR_LAST_LINE_END_INDENT, PR_LEADER_ALIGNMENT, PR_LEADER_LENGTH, PR_LEADER_PATTERN, PR_LEADER_PATTERN_WIDTH, PR_LEFT, PR_LETTER_SPACING, PR_LETTER_VALUE, PR_LINE_HEIGHT, PR_LINE_HEIGHT_SHIFT_ADJUSTMENT, PR_LINE_STACKING_STRATEGY, PR_LINEFEED_TREATMENT, PR_MARGIN, PR_MARGIN_BOTTOM, PR_MARGIN_LEFT, PR_MARGIN_RIGHT, PR_MARGIN_TOP, PR_MARKER_CLASS_NAME, PR_MASTER_NAME, PR_MASTER_REFERENCE, PR_MAX_HEIGHT, PR_MAX_WIDTH, PR_MAXIMUM_REPEATS, PR_MEDIA_USAGE, PR_MIN_HEIGHT, PR_MIN_WIDTH, PR_NUMBER_COLUMNS_REPEATED, PR_NUMBER_COLUMNS_SPANNED, PR_NUMBER_ROWS_SPANNED, PR_ODD_OR_EVEN, PR_ORPHANS, PR_OVERFLOW, PR_PADDING, PR_PADDING_AFTER, PR_PADDING_BEFORE, PR_PADDING_BOTTOM, PR_PADDING_END, PR_PADDING_LEFT, PR_PADDING_RIGHT, PR_PADDING_START, PR_PADDING_TOP, PR_PAGE_BREAK_AFTER, PR_PAGE_BREAK_BEFORE, PR_PAGE_BREAK_INSIDE, PR_PAGE_HEIGHT, PR_PAGE_POSITION, PR_PAGE_WIDTH, PR_PAUSE, PR_PAUSE_AFTER, PR_PAUSE_BEFORE, PR_PITCH, PR_PITCH_RANGE, PR_PLAY_DURING, PR_POSITION, PR_PRECEDENCE, PR_PROVISIONAL_DISTANCE_BETWEEN_STARTS, PR_PROVISIONAL_LABEL_SEPARATION, PR_REF_ID, PR_REFERENCE_ORIENTATION, PR_REGION_NAME, PR_RELATIVE_ALIGN, PR_RELATIVE_POSITION, PR_RENDERING_INTENT, PR_RETRIEVE_BOUNDARY, PR_RETRIEVE_CLASS_NAME, PR_RETRIEVE_POSITION, PR_RICHNESS, PR_RIGHT, PR_ROLE, PR_RULE_STYLE, PR_RULE_THICKNESS, PR_SCALING, PR_SCALING_METHOD, PR_SCORE_SPACES, PR_SCRIPT, PR_SHOW_DESTINATION, PR_SIZE, PR_SOURCE_DOCUMENT, PR_SPACE_AFTER, PR_SPACE_BEFORE, PR_SPACE_END, PR_SPACE_START, PR_SPAN, PR_SPEAK, PR_SPEAK_HEADER, PR_SPEAK_NUMERAL, PR_SPEAK_PUNCTUATION, PR_SPEECH_RATE, PR_SRC, PR_START_INDENT, PR_STARTING_STATE, PR_STARTS_ROW, PR_STRESS, PR_SUPPRESS_AT_LINE_BREAK, PR_SWITCH_TO, PR_TABLE_LAYOUT, PR_TABLE_OMIT_FOOTER_AT_BREAK, PR_TABLE_OMIT_HEADER_AT_BREAK, PR_TARGET_PRESENTATION_CONTEXT, PR_TARGET_PROCESSING_CONTEXT, PR_TARGET_STYLESHEET, PR_TEXT_ALIGN, PR_TEXT_ALIGN_LAST, PR_TEXT_ALTITUDE, PR_TEXT_DECORATION, PR_TEXT_DEPTH, PR_TEXT_INDENT, PR_TEXT_SHADOW, PR_TEXT_TRANSFORM, PR_TOP, PR_TREAT_AS_WORD_SPACE, PR_UNICODE_BIDI, PR_VERTICAL_ALIGN, PR_VISIBILITY, PR_VOICE_FAMILY, PR_VOLUME, PR_WHITE_SPACE, PR_WHITE_SPACE_COLLAPSE, PR_WHITE_SPACE_TREATMENT, PR_WIDOWS, PR_WIDTH, PR_WORD_SPACING, PR_WRAP_OPTION, PR_WRITING_MODE, PR_X_BLOCK_PROGRESSION_UNIT, PR_X_ORPHAN_CONTENT_LIMIT, PR_X_WIDOW_CONTENT_LIMIT, PR_XML_LANG, PR_Z_INDEX, PROPERTY_COUNT, PROPERTY_MASK

Constructor Summary

Constructors

Constructor and Description
BlockContainer(FONode parent)

Method Summary

Methods

Modifier and Type	Method and Description
void	bind(PropertyList pList) Bind property values from the property list to the FO node.
protected void	endOfNode() Primarily used for making final content model validation checks and/or informing the FOEventHandler that the end of this FO has been reached.
boolean	generatesReferenceAreas() Check if this formatting object generates reference areas.
LengthRangeProperty	getBlockProgressionDimension()
int	getBreakAfter()
int	getBreakBefore()
CommonAbsolutePosition	getCommonAbsolutePosition()
CommonBorderPaddingBackground	getCommonBorderPaddingBackground()
CommonMarginBlock	getCommonMarginBlock()
int	getDisplayAlign()
Length	getHeight()
LengthRangeProperty	getInlineProgressionDimension()
KeepProperty	getKeepTogether()
KeepProperty	getKeepWithNext()
KeepProperty	getKeepWithPrevious()
java.lang.String	getLocalName() Returns the local name (i.e.
int	getNameId() Returns the Constants class integer value of this node
int	getOverflow()
int	getReferenceOrientation()
int	getSpan()
Length	getWidth()
int	getWritingMode()
protected void	startOfNode() Called after processNode() is called.
protected void	validateChildNode(org.xml.sax.Locator loc, java.lang.String nsURI, java.lang.String localName) Checks to make sure, during SAX processing of input document, that the incoming node is valid for the this (parent) node (e.g., checking to see that fo:table is not an immediate child of fo:root) called from FOTreeBuilder.startElement(String, String, String, Attributes) before constructing the child FObj.

Methods inherited from class org.apache.fop.fo.FObj

addChildNode, addChildTo, addExtensionAttachment, addForeignAttribute, addMarker, clone, createPropertyList, findAncestor, findNearestAncestorFObj, gatherContextInfo, getChildNodes, getChildNodes, getExtensionAttachments, getForeignAttributes, getId, getIsOutOfLineFODescendant, getMarkers, getNamespaceURI, getNormalNamespacePrefix, getPropertyMakerFor, hasId, hasMarkers, isBlockItem, isBlockOrInlineItem, isInlineItem, isNeutralItem, notifyChildRemoval, processNode, removeChild, toString

Methods inherited from class org.apache.fop.fo.FONode

addCharacters, attachSiblings, attributeError, attributeWarning, canHaveMarkers, charIterator, clone, decorateWithContextInfo, errorText, getContentHandlerFactory, getContextInfo, getExtensionAttachment, getFOEventHandler, getLocator, getLocatorString, getLogger, getName, getName, getNodeString, getParent, getRoot, getUserAgent, inMarker, invalidChildError, invalidChildError, missingChildElementError, missingPropertyError, nodesOutOfOrderError, setLocator, tooManyNodesError, tooManyNodesError, validateChildNode, warningText

Methods inherited from class java.lang.Object

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

Constructor Detail

BlockContainer

public BlockContainer(FONode parent)

Parameters:

parent - FONode that is the parent of this object

Method Detail

bind

public void bind(PropertyList pList)
          throws FOPException

Bind property values from the property list to the FO node. Must be overridden in all FObj subclasses that have properties applying to it.

Overrides:

bind in class FObj

Parameters:

pList - the PropertyList where the properties can be found.

Throws:

FOPException - if there is a problem binding the values

startOfNode

protected void startOfNode()
                    throws FOPException

Called after processNode() is called. Subclasses can do additional processing.

Overrides:

startOfNode in class FObj

Throws:

FOPException - FOP Exception

validateChildNode

protected void validateChildNode(org.xml.sax.Locator loc,
                     java.lang.String nsURI,
                     java.lang.String localName)
                          throws ValidationException

Checks to make sure, during SAX processing of input document, that the incoming node is valid for the this (parent) node (e.g., checking to see that fo:table is not an immediate child of fo:root) called from FOTreeBuilder.startElement(String, String, String, Attributes) before constructing the child FObj. XSL Content Model: marker* (%block;)+ But: "In addition an fo:block-container that does not generate an absolutely positioned area may have a sequence of zero or more fo:markers as its initial children."

Overrides:

validateChildNode in class FONode

Parameters:

loc - location in the FO source file

nsURI - namespace of incoming node

localName - name of the incoming node (without namespace prefix)

Throws:

ValidationException - if incoming node not valid for parent

To do:

- implement above restriction if possible

endOfNode

protected void endOfNode()
                  throws FOPException

Primarily used for making final content model validation checks and/or informing the FOEventHandler that the end of this FO has been reached.

Overrides:

endOfNode in class FONode

Throws:

FOPException - if there's a problem during processing

generatesReferenceAreas

public boolean generatesReferenceAreas()

Description copied from class: FObj

Check if this formatting object generates reference areas.

Overrides:

generatesReferenceAreas in class FObj

Returns:

true (BlockContainer can generate Reference Areas)

getCommonAbsolutePosition

public CommonAbsolutePosition getCommonAbsolutePosition()

Returns:

the Common Absolute Position Properties.

getCommonMarginBlock

public CommonMarginBlock getCommonMarginBlock()

Returns:

the Common Margin Properties-Block.

getCommonBorderPaddingBackground

public CommonBorderPaddingBackground getCommonBorderPaddingBackground()

Returns:

the Common Border, Padding, and Background Properties.

getBlockProgressionDimension

public LengthRangeProperty getBlockProgressionDimension()

Returns:

the "block-progression-dimension" property.

getDisplayAlign

public int getDisplayAlign()

Returns:

the display-align property.

getBreakAfter

public int getBreakAfter()

Specified by:

getBreakAfter in interface BreakPropertySet

Returns:

the "break-after" property.

getBreakBefore

public int getBreakBefore()

Specified by:

getBreakBefore in interface BreakPropertySet

Returns:

the "break-before" property.

getKeepWithNext

public KeepProperty getKeepWithNext()

Returns:

the "keep-with-next" property.

getKeepWithPrevious

public KeepProperty getKeepWithPrevious()

Returns:

the "keep-with-previous" property.

getKeepTogether

public KeepProperty getKeepTogether()

Returns:

the "keep-together" property.

getInlineProgressionDimension

public LengthRangeProperty getInlineProgressionDimension()

Returns:

the "inline-progression-dimension" property.

getOverflow

public int getOverflow()

Returns:

the "overflow" property.

getReferenceOrientation

public int getReferenceOrientation()

Returns:

the "reference-orientation" property.

getSpan

public int getSpan()

Returns:

the "span" property.

getWritingMode

public int getWritingMode()

Returns:

the "writing-mode" property.

getWidth

public Length getWidth()

Returns:

the width property

getHeight

public Length getHeight()

Returns:

the height property

getLocalName

public java.lang.String getLocalName()

Returns the local name (i.e. without namespace prefix) of the node

Specified by:

getLocalName in class FONode

Returns:

the local name of this node

getNameId

public int getNameId()

Returns the Constants class integer value of this node

Overrides:

getNameId in class FONode

Returns:

the integer enumeration of this FO (e.g. FO_ROOT) if a formatting object, FO_UNKNOWN_NODE otherwise