org.apache.fop.layoutmgr

## Class BlockStackingLayoutManager

- java.lang.Object
- - org.apache.fop.layoutmgr.AbstractBaseLayoutManager
  - - org.apache.fop.layoutmgr.AbstractLayoutManager
    - - org.apache.fop.layoutmgr.BlockStackingLayoutManager

All Implemented Interfaces:
  PercentBaseContext, Constants, BlockLevelLayoutManager, LayoutManager

Direct Known Subclasses:
  FlowLayoutManager, FootnoteBodyLayoutManager, ListItemContentLayoutManager, MultiCaseLayoutManager, MultiSwitchLayoutManager, SpacedBorderedPaddedBlockLayoutManager, StaticContentLayoutManager, TableAndCaptionLayoutManager, TableCaptionLayoutManager, TableCellLayoutManager

    public abstract class BlockStackingLayoutManager
    extends AbstractLayoutManager
    implements BlockLevelLayoutManager

Base LayoutManager class for all areas which stack their child areas in the block-progression direction, such as Flow, Block, ListBlock.

### Nested Class Summary

Nested Classes
`protected static class` `BlockStackingLayoutManager.MappingPosition` A mapping position.

### Field Summary

Fields
`protected int` `adjustedSpaceAfter` space-after value adjusted for block-progression-unit handling
`protected int` `adjustedSpaceBefore` space-before value adjusted for block-progression-unit handling
`protected int` `bpUnit` Value of the block-progression-unit (non-standard property)
`protected boolean` `breakBeforeServed` Indicates whether break before has been served or not
`protected int` `endIndent` the effective end-indent value
`protected boolean` `firstVisibleMarkServed` Indicates whether the first visible mark has been returned by this LM, yet
`protected MinOptMax` `foSpaceAfter` see foSpaceBefore
`protected MinOptMax` `foSpaceBefore` Holds the (one-time use) fo:block space-before and -after properties.
`protected BlockParent` `parentArea` parent area
`protected int` `referenceIPD` Reference IPD available
`protected int` `startIndent` the effective start-indent value
`protected List<KnuthElement>` `storedList` Only used to store the original list when createUnitElements is called

### Fields inherited from class org.apache.fop.layoutmgr.AbstractLayoutManager

`childLMiter, childLMs, curChildLM, fobjIter, parentLayoutManager`

### Fields inherited from class org.apache.fop.layoutmgr.AbstractBaseLayoutManager

`fobj, generatesBlockArea, generatesReferenceArea`

### 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_ALTERNATE, 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_BT, 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_FIRST_INCLUDING_CARRYOVER, EN_FIRST_STARTING, 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_LAST_ENDING, EN_LAST_STARTING, EN_LEAVE_SEPARATE, EN_LEFT, EN_LEWP, EN_LIGHTER, EN_LINE, EN_LINE_HEIGHT, EN_LINE_THROUGH, EN_LINK, EN_LOWERCASE, EN_LR, EN_LR_TB, EN_LSWP, EN_LTR, EN_MATHEMATICAL, EN_MAX_HEIGHT, EN_MENU, EN_MERGE, EN_MESSAGE_BOX, EN_MIDDLE, EN_NARROWER, EN_NEW, EN_NO_BLINK, EN_NO_CHANGE, EN_NO_FORCE, EN_NO_LIMIT, EN_NO_LINE_THROUGH, EN_NO_LINK, 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_REPLACE, EN_RESAMPLE_ANY_METHOD, EN_RESET_SIZE, EN_REST, EN_RETAIN, EN_RIDGE, EN_RIGHT, EN_RL, 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_SELECT_FIRST_FITTING, 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_TABLE, EN_TABLE_FRAGMENT, EN_TB, EN_TB_LR, 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, ENUM_COUNT, FO_BASIC_LINK, FO_BIDI_OVERRIDE, FO_BLOCK, FO_BLOCK_CONTAINER, FO_BOOKMARK, FO_BOOKMARK_TITLE, FO_BOOKMARK_TREE, FO_CHANGE_BAR_BEGIN, FO_CHANGE_BAR_END, FO_CHARACTER, FO_COLOR_PROFILE, FO_CONDITIONAL_PAGE_MASTER_REFERENCE, FO_DECLARATIONS, FO_EXTERNAL_GRAPHIC, FO_FLOAT, FO_FLOW, FO_FLOW_ASSIGNMENT, FO_FLOW_MAP, FO_FLOW_NAME_SPECIFIER, FO_FLOW_SOURCE_LIST, FO_FLOW_TARGET_LIST, FO_FOLIO_PREFIX, FO_FOLIO_SUFFIX, FO_FOOTNOTE, FO_FOOTNOTE_BODY, FO_INDEX_KEY_REFERENCE, FO_INDEX_PAGE_CITATION_LIST, FO_INDEX_PAGE_CITATION_LIST_SEPARATOR, FO_INDEX_PAGE_CITATION_RANGE_SEPARATOR, FO_INDEX_PAGE_NUMBER_PREFIX, FO_INDEX_PAGE_NUMBER_SUFFIX, FO_INDEX_RANGE_BEGIN, FO_INDEX_RANGE_END, 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_NAME_SPECIFIER, FO_REGION_START, FO_REPEATABLE_PAGE_MASTER_ALTERNATIVES, FO_REPEATABLE_PAGE_MASTER_REFERENCE, FO_RETRIEVE_MARKER, FO_RETRIEVE_TABLE_MARKER, FO_ROOT, FO_SCALING_VALUE_CITATION, 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_CHANGE_BAR_CLASS, PR_CHANGE_BAR_COLOR, PR_CHANGE_BAR_OFFSET, PR_CHANGE_BAR_PLACEMENT, PR_CHANGE_BAR_STYLE, PR_CHANGE_BAR_WIDTH, 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_MAP_NAME, PR_FLOW_MAP_REFERENCE, PR_FLOW_NAME, PR_FLOW_NAME_REFERENCE, 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_INTRINSIC_SCALE_VALUE, 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_MERGE_PAGES_ACROSS_INDEX_KEY_REFERENCES, PR_MERGE_RANGES_ACROSS_INDEX_KEY_REFERENCES, PR_MERGE_SEQUENTIAL_PAGE_NUMBERS, 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_CITATION_STRATEGY, PR_PAGE_HEIGHT, PR_PAGE_NUMBER_TREATMENT, 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_REF_INDEX_KEY, PR_REFERENCE_ORIENTATION, PR_REGION_NAME, PR_REGION_NAME_REFERENCE, PR_RELATIVE_ALIGN, PR_RELATIVE_POSITION, PR_RENDERING_INTENT, PR_RETRIEVE_BOUNDARY, PR_RETRIEVE_BOUNDARY_WITHIN_TABLE, PR_RETRIEVE_CLASS_NAME, PR_RETRIEVE_POSITION, PR_RETRIEVE_POSITION_WITHIN_TABLE, 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_ABBREVIATION, PR_X_ALT_TEXT, PR_X_AUTO_TOGGLE, PR_X_BACKGROUND_IMAGE_HEIGHT, PR_X_BACKGROUND_IMAGE_WIDTH, PR_X_BORDER_AFTER_END_RADIUS, PR_X_BORDER_AFTER_RADIUS_END, PR_X_BORDER_AFTER_RADIUS_START, PR_X_BORDER_AFTER_START_RADIUS, PR_X_BORDER_BEFORE_END_RADIUS, PR_X_BORDER_BEFORE_RADIUS_END, PR_X_BORDER_BEFORE_RADIUS_START, PR_X_BORDER_BEFORE_START_RADIUS, PR_X_BORDER_END_RADIUS_AFTER, PR_X_BORDER_END_RADIUS_BEFORE, PR_X_BORDER_RADIUS, PR_X_BORDER_START_RADIUS_AFTER, PR_X_BORDER_START_RADIUS_BEFORE, PR_X_DISABLE_COLUMN_BALANCING, PR_X_HEADER_COLUMN, PR_X_LAYER, PR_X_NUMBER_CONVERSION_FEATURES, PR_X_ORPHAN_CONTENT_LIMIT, PR_X_WIDOW_CONTENT_LIMIT, PR_X_XML_BASE, PR_XML_LANG, PR_Z_INDEX, PROPERTY_COUNT, PROPERTY_MASK`

### Constructor Summary

Constructors
Constructor and Description
`BlockStackingLayoutManager(FObj node)`

### Method Summary

All Methods Instance Methods Concrete Methods
`void` `addBlockSpacing(double adjust, MinOptMax minoptmax)` Add a block spacer for space before and space after a block.
`void` `addChildArea(Area childArea)` Add the childArea to the current area.
`protected void` `addChildToArea(Area childArea, BlockParent parentArea)` Add the childArea to the passed area.
`protected void` `addFirstVisibleMarks(List<ListElement> elements, LayoutContext context, int alignment)` Checks if this LM's first "visible marks" (= borders, padding, spaces) have already been processed, and if necessary, adds corresponding elements to the specified list, and updates the given layout context accordingly.
`protected void` `addInBetweenBreak(List<ListElement> contentList, LayoutContext parentLC, LayoutContext childLC)` Adds a break element to the content list between individual child elements.
`protected void` `addKnuthElementsForBorderPaddingAfter(List returnList, boolean isLast)` Creates Knuth elements for after border padding and adds them to the return list.
`protected void` `addKnuthElementsForBorderPaddingBefore(List returnList, boolean isFirst)` Creates Knuth elements for before border padding and adds them to the return list.
`protected boolean` `addKnuthElementsForBreakAfter(List returnList, LayoutContext context)` Creates Knuth elements for break-after and adds them to the return list.
`protected boolean` `addKnuthElementsForBreakBefore(List returnList, LayoutContext context)` Creates Knuth elements for break-before and adds them to the return list.
`protected void` `addKnuthElementsForSpaceAfter(List returnList, int alignment)` Creates Knuth elements for space-after and adds them to the return list.
`protected void` `addKnuthElementsForSpaceBefore(List returnList, int alignment)` Creates Knuth elements for space-before and adds them to the return list.
`protected void` `addLastVisibleMarks(List<ListElement> elements, LayoutContext context, int alignment)` Adds elements the LM's last/closing marks to the specified list, and updates the layout context accordingly.
`protected void` `addPendingMarks(LayoutContext context)` Adds the unresolved elements for border and padding to a layout context so break possibilities can be properly constructed.
`protected boolean` `breakBeforeServed(LayoutContext context, List<ListElement> elements)` Check whether there is a break-before condition.
`void` `discardSpace(KnuthGlue spaceGlue)` Discard space.
`protected void` `flush()` Force current area to be added to parent area.
`protected Position` `getAuxiliaryPosition()`
`int` `getBreakBefore()` Returns the highest priority break-before value on this layout manager or its relevant descendants.
`List` `getChangedKnuthElements(List oldList, int alignment)` Get a sequence of KnuthElements representing the content of the node assigned to the LM, after changes have been applied In the context of line breaking, this method is called after hyphenation has been performed, in order to receive the sequence of elements representing the text together with all possible hyphenation points.
`int` `getContentAreaBPD()` Returns the BPD of the content area
`int` `getContentAreaIPD()` Returns the IPD of the content area
`protected BlockParent` `getCurrentArea()`
`protected int` `getIPIndents()`
`Keep` `getKeepTogether()` Returns the keep-together strength for this element.
`KeepProperty` `getKeepTogetherProperty()` Returns the keep-together property specified on the FObj.
`Keep` `getKeepWithNext()` Returns the keep-with-next strength for this element.
`KeepProperty` `getKeepWithNextProperty()` Returns the keep-with-next property specified on the FObj.
`Keep` `getKeepWithPrevious()` Returns the keep-with-previous strength for this element.
`KeepProperty` `getKeepWithPreviousProperty()` Returns the keep-with-previous property specified on the FObj.
`protected List<ListElement>` `getNextChildElements(LayoutManager childLM, LayoutContext context, LayoutContext childLC, int alignment, Stack<LayoutManager> lmStack, Position restartPosition, LayoutManager restartAtLM)` Gets the next set of child elements for the given childLM.
`List` `getNextKnuthElements(LayoutContext context, int alignment)` Get a sequence of KnuthElements representing the content of the node assigned to the LM.
`List` `getNextKnuthElements(LayoutContext context, int alignment, Stack lmStack, Position restartPosition, LayoutManager restartAtLM)` Returns an updated list of Knuth elements corresponding to this layout manager, after a change of IPD has been detected.
`protected Keep` `getParentKeepTogether()` Retrieves and returns the keep-together strength from the parent element.
`protected SpaceProperty` `getSpaceAfterProperty()`
`protected SpaceProperty` `getSpaceBeforeProperty()`
`boolean` `handleOverflow(int milliPoints)` Whether this LM can handle horizontal overflow error messages (only a BlockContainerLayoutManager can).
`boolean` `isRestartAtLM()`
`protected LayoutContext` `makeChildLayoutContext(LayoutContext context)` Creates and initializes a `LayoutContext` to pass to the child LM
`boolean` `mustKeepTogether()`
`boolean` `mustKeepWithNext()`
`boolean` `mustKeepWithPrevious()`
`protected int` `neededUnits(int len)`
`int` `negotiateBPDAdjustment(int adj, KnuthElement lastElement)` Negotiate BPD adjustment.
`void` `reset()` Re-initializes this layout manager in order to re-generate its Knuth elements according to a new IPD value.
`protected void` `setContentAreaIPD(int contentAreaIPD)` Sets the IPD of the content area
`protected void` `setCurrentArea(BlockParent parentArea)` Set the current area being filled.
`protected int` `updateContentAreaIPDwithOverconstrainedAdjust()` Determines and sets the content area IPD based on available reference area IPD, start- and end-indent properties.
`protected int` `updateContentAreaIPDwithOverconstrainedAdjust(int contentIPD)` Sets the content area IPD by directly supplying the value.
`protected void` `wrapPositionElement(ListElement el, List targetList, boolean force)` "wrap" the Position inside the given element and add it to the target list.
`protected void` `wrapPositionElements(List sourceList, List targetList)` "wrap" the Position inside each element moving the elements from SourceList to targetList
`protected void` `wrapPositionElements(List sourceList, List targetList, boolean force)` "wrap" the Position inside each element moving the elements from SourceList to targetList

### Methods inherited from class org.apache.fop.layoutmgr.AbstractLayoutManager

`addAreas, addChildLM, addChildLMs, addId, checkEndOfLayout, createChildLMs, createNextChildLMs, getBaselineOffset, getChildLM, getChildLMs, getCurrentPage, getCurrentPV, getParent, getParentArea, getPSLM, handlingFloat, hasLineAreaDescendant, hasNextChildLM, initialize, isFinished, isFirst, isLast, newNoLineAreaDescendantException, notifyEndOfLayout, notifyPos, possiblyRegisterMarkersForTables, preserveChildrenAtEndOfLayout, recreateChildrenLMs, registerMarkers, setCurrentChildLM, setFinished, setParent, toString, transferExtensionAttachments, transferExtensions, transferForeignAttributes`

### Methods inherited from class org.apache.fop.layoutmgr.AbstractBaseLayoutManager

`getAncestorBlockAreaBPD, getAncestorBlockAreaIPD, getBaseLength, getChangeBarList, getFObj, getGeneratesBlockArea, getGeneratesLineArea, getGeneratesReferenceArea, getParentAreaBPD, getParentAreaIPD, getReferenceAreaBPD, getReferenceAreaIPD, isRestartable, setGeneratesBlockArea, setGeneratesReferenceArea`

### Methods inherited from class java.lang.Object

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

### Methods inherited from interface org.apache.fop.layoutmgr.LayoutManager

`addAreas, addChildLM, addChildLMs, createNextChildLMs, getBaselineOffset, getChildLMs, getFObj, getGeneratesBlockArea, getGeneratesLineArea, getGeneratesReferenceArea, getParent, getParentArea, getPSLM, hasLineAreaDescendant, initialize, isFinished, isRestartable, notifyPos, setFinished, setParent`

### Methods inherited from interface org.apache.fop.datatypes.PercentBaseContext

`getBaseLength`

### Field Detail

#### parentArea

    protected BlockParent parentArea

parent area

#### bpUnit

    protected int bpUnit

Value of the block-progression-unit (non-standard property)

#### adjustedSpaceBefore

    protected int adjustedSpaceBefore

space-before value adjusted for block-progression-unit handling

#### adjustedSpaceAfter

    protected int adjustedSpaceAfter

space-after value adjusted for block-progression-unit handling

#### storedList

    protected List<KnuthElement> storedList

Only used to store the original list when createUnitElements is called

#### breakBeforeServed

    protected boolean breakBeforeServed

Indicates whether break before has been served or not

#### firstVisibleMarkServed

    protected boolean firstVisibleMarkServed

Indicates whether the first visible mark has been returned by this LM, yet

#### referenceIPD

    protected int referenceIPD

Reference IPD available

#### startIndent

    protected int startIndent

the effective start-indent value

#### endIndent

    protected int endIndent

the effective end-indent value

#### foSpaceBefore

    protected MinOptMax foSpaceBefore

Holds the (one-time use) fo:block space-before and -after properties. Large fo:blocks are split into multiple Area. Blocks to accomodate the subsequent regions (pages) they are placed on. space-before is applied at the beginning of the first Block and space-after at the end of the last Block used in rendering the fo:block.

#### foSpaceAfter

    protected MinOptMax foSpaceAfter

see foSpaceBefore

### Constructor Detail

#### BlockStackingLayoutManager

    public BlockStackingLayoutManager(FObj node)

Parameters:
  `node` - the fo this LM deals with

### Method Detail

#### getCurrentArea

    protected BlockParent getCurrentArea()

Returns:
  current area being filled

#### setCurrentArea

    protected void setCurrentArea(BlockParent parentArea)

Set the current area being filled.

Parameters:
  `parentArea` - the current area to be filled

#### addBlockSpacing

    public void addBlockSpacing(double adjust,
                                MinOptMax minoptmax)

Add a block spacer for space before and space after a block. This adds an empty Block area that acts as a block space.

Parameters:
  `adjust` - the adjustment value
  `minoptmax` - the min/opt/max value of the spacing

#### addChildToArea

    protected void addChildToArea(Area childArea,
                                  BlockParent parentArea)

Add the childArea to the passed area. Called by child LayoutManager when it has filled one of its areas. The LM should already have an Area in which to put the child. See if the area will fit in the current area. If so, add it. Otherwise initiate breaking.

Parameters:
  `childArea` - the area to add: will be some block-stacked Area.
  `parentArea` - the area in which to add the childArea

#### addChildArea

    public void addChildArea(Area childArea)

Add the childArea to the current area. Called by child LayoutManager when it has filled one of its areas. The LM should already have an Area in which to put the child. See if the area will fit in the current area. If so, add it. Otherwise initiate breaking.

Specified by:
  `addChildArea` in interface `LayoutManager`
Overrides:
  `addChildArea` in class `AbstractLayoutManager`
Parameters:
  `childArea` - the area to add: will be some block-stacked Area.

#### flush

    protected void flush()

Force current area to be added to parent area.

#### getAuxiliaryPosition

    protected Position getAuxiliaryPosition()

Returns:
  a cached auxiliary Position instance used for things like spaces.

#### neededUnits

    protected int neededUnits(int len)

Parameters:
  `len` - length in millipoints to span with bp units
Returns:
  the minimum integer n such that n * bpUnit >= len

#### updateContentAreaIPDwithOverconstrainedAdjust

    protected int updateContentAreaIPDwithOverconstrainedAdjust()

Determines and sets the content area IPD based on available reference area IPD, start- and end-indent properties. end-indent is adjusted based on overconstrained geometry rules, if necessary.

Returns:
  the resulting content area IPD

#### updateContentAreaIPDwithOverconstrainedAdjust

    protected int updateContentAreaIPDwithOverconstrainedAdjust(int contentIPD)

Sets the content area IPD by directly supplying the value. end-indent is adjusted based on overconstrained geometry rules, if necessary.

Parameters:
  `contentIPD` - the IPD of the content
Returns:
  the resulting content area IPD

#### getNextKnuthElements

    public List getNextKnuthElements(LayoutContext context,
                                     int alignment)

Get a sequence of KnuthElements representing the content of the node assigned to the LM.

Specified by:
  `getNextKnuthElements` in interface `LayoutManager`
Overrides:
  `getNextKnuthElements` in class `AbstractLayoutManager`
Parameters:
  `context` - the LayoutContext used to store layout information
  `alignment` - the desired text alignment
Returns:
  the list of KnuthElements

#### getNextKnuthElements

    public List getNextKnuthElements(LayoutContext context,
                                     int alignment,
                                     Stack lmStack,
                                     Position restartPosition,
                                     LayoutManager restartAtLM)

Returns an updated list of Knuth elements corresponding to this layout manager, after a change of IPD has been detected.

Specified by:
  `getNextKnuthElements` in interface `LayoutManager`
Overrides:
  `getNextKnuthElements` in class `AbstractBaseLayoutManager`
Parameters:
  `context` - the layout context
  `alignment` - the alignment
  `lmStack` - the stack of LMs that are active at the IPD change
  `restartPosition` - the position corresponding to the element finishing the page before the IPD change
  `restartAtLM` - if not null, the layout manager from which to restart. That is, the IPD change occurs between two block elements and not inside a paragraph
Returns:
  an updated list of elements, taking the new IPD into account

#### makeChildLayoutContext

    protected LayoutContext makeChildLayoutContext(LayoutContext context)

Creates and initializes a `LayoutContext` to pass to the child LM

Parameters:
  `context` - the parent `LayoutContext`
Returns:
  a new child layout context

#### addFirstVisibleMarks

    protected void addFirstVisibleMarks(List<ListElement> elements,
                                        LayoutContext context,
                                        int alignment)

Checks if this LM's first "visible marks" (= borders, padding, spaces) have already been processed, and if necessary, adds corresponding elements to the specified list, and updates the given layout context accordingly.

Parameters:
  `elements` - the element list
  `context` - the layout context
  `alignment` - the vertical alignment

#### addLastVisibleMarks

    protected void addLastVisibleMarks(List<ListElement> elements,
                                       LayoutContext context,
                                       int alignment)

Adds elements the LM's last/closing marks to the specified list, and updates the layout context accordingly.

Parameters:
  `elements` - the element list
  `context` - the layout context
  `alignment` - the vertical alignment

#### breakBeforeServed

    protected boolean breakBeforeServed(LayoutContext context,
                                        List<ListElement> elements)

Check whether there is a break-before condition. If so, and the specified `context` allows it, add the necessary elements to the given `elements` list.

Parameters:
  `context` - the layout context
  `elements` - the element list
Returns:
  `false` if there is a break-before condition, and it has not been served; `true` otherwise

#### getNextChildElements

    protected List<ListElement> getNextChildElements(LayoutManager childLM,
                                                     LayoutContext context,
                                                     LayoutContext childLC,
                                                     int alignment,
                                                     Stack<LayoutManager> lmStack,
                                                     Position restartPosition,
                                                     LayoutManager restartAtLM)

Gets the next set of child elements for the given childLM. The default implementation basically copies the pending marks to the child layout context, and subsequently calls the appropriate variant of `childLM.getNextKnuthElements()`, passing it all relevant parameters.

Parameters:
  `childLM` - the current child LM
  `context` - the layout context
  `childLC` - the child layout context
  `alignment` - the vertical alignment
  `lmStack` - the stack of currently active LMs (if any)
  `restartPosition` - the position to restart from (if any)
  `restartAtLM` - the LM to restart from (if any)
Returns:
  list of elements corresponding to the content generated by childLM

#### addInBetweenBreak

    protected void addInBetweenBreak(List<ListElement> contentList,
                                     LayoutContext parentLC,
                                     LayoutContext childLC)

Adds a break element to the content list between individual child elements.

Parameters:
  `contentList` - the content list
  `parentLC` - the parent layout context
  `childLC` - the currently active child layout context

#### negotiateBPDAdjustment

    public int negotiateBPDAdjustment(int adj,
                                      KnuthElement lastElement)

Negotiate BPD adjustment.

Specified by:
  `negotiateBPDAdjustment` in interface `BlockLevelLayoutManager`
Parameters:
  `adj` - amount to adjust
  `lastElement` - the last knuth element
Returns:
  the resulting adjusted BPD

#### discardSpace

    public void discardSpace(KnuthGlue spaceGlue)

Discard space.

Specified by:
  `discardSpace` in interface `BlockLevelLayoutManager`
Parameters:
  `spaceGlue` - the space

#### getChangedKnuthElements

    public List getChangedKnuthElements(List oldList,
                                        int alignment)

Get a sequence of KnuthElements representing the content of the node assigned to the LM, after changes have been applied In the context of line breaking, this method is called after hyphenation has been performed, in order to receive the sequence of elements representing the text together with all possible hyphenation points. For example, if the text "representation" originates a single box element when getNextKnuthElements() is called, it will be now split in syllables (rep-re-sen-ta-tion) each one originating a box and divided by additional elements allowing a line break. In the context of page breaking, this method is called only if the pages need to be "vertically justified" modifying (also) the quantity of lines created by the paragraphs, and after a first page breaking has been performed. According to the result of the first page breaking, each paragraph now knows how many lines it must create (among the existing layout possibilities) and has to create a sequence of elements representing this layout; in particular, each box, representing a line, will contain a LineBreakPositions that will be used in the addAreas() phase. LMs having children look at the old list of elements in order to know which ones they must get the new elements from, as break conditions of preserved linefeeds can divide children into smaller groups (page sequences or paragraphs). LMs having no children can simply return the old elements if they have nothing to change. Inline LMs need to know the text alignment because it affects the elements representing feasible breaks between syllables.

Specified by:
  `getChangedKnuthElements` in interface `LayoutManager`
Overrides:
  `getChangedKnuthElements` in class `AbstractLayoutManager`
Parameters:
  `oldList` - the elements to replace
  `alignment` - the desired text alignment
Returns:
  the updated list of KnuthElements

#### getParentKeepTogether

    protected Keep getParentKeepTogether()

Retrieves and returns the keep-together strength from the parent element.

Returns:
  the keep-together strength

#### mustKeepTogether

    public boolean mustKeepTogether()

Specified by:
  `mustKeepTogether` in interface `BlockLevelLayoutManager`
Returns:
  true if this element must be kept together

#### mustKeepWithPrevious

    public boolean mustKeepWithPrevious()

Specified by:
  `mustKeepWithPrevious` in interface `BlockLevelLayoutManager`
Returns:
  true if this element must be kept with the previous element.

#### mustKeepWithNext

    public boolean mustKeepWithNext()

Specified by:
  `mustKeepWithNext` in interface `BlockLevelLayoutManager`
Returns:
  true if this element must be kept with the next element.

#### getKeepTogether

    public Keep getKeepTogether()

Returns the keep-together strength for this element.

Specified by:
  `getKeepTogether` in interface `BlockLevelLayoutManager`
Returns:
  the keep-together strength

#### getKeepWithPrevious

    public Keep getKeepWithPrevious()

Returns the keep-with-previous strength for this element.

Specified by:
  `getKeepWithPrevious` in interface `BlockLevelLayoutManager`
Returns:
  the keep-with-previous strength

#### getKeepWithNext

    public Keep getKeepWithNext()

Returns the keep-with-next strength for this element.

Specified by:
  `getKeepWithNext` in interface `BlockLevelLayoutManager`
Returns:
  the keep-with-next strength

#### getKeepTogetherProperty

    public KeepProperty getKeepTogetherProperty()

Returns the keep-together property specified on the FObj. Default implementation throws a `IllegalStateException`. Must be implemented by the subclass, if applicable.

Specified by:
  `getKeepTogetherProperty` in interface `BlockLevelLayoutManager`
Returns:
  the keep-together property

#### getKeepWithPreviousProperty

    public KeepProperty getKeepWithPreviousProperty()

Returns the keep-with-previous property specified on the FObj. Default implementation throws a `IllegalStateException`. Must be implemented by the subclass, if applicable.

Specified by:
  `getKeepWithPreviousProperty` in interface `BlockLevelLayoutManager`
Returns:
  the keep-together property

#### getKeepWithNextProperty

    public KeepProperty getKeepWithNextProperty()

Returns the keep-with-next property specified on the FObj. Default implementation throws a `IllegalStateException`. Must be implemented by the subclass, if applicable.

Specified by:
  `getKeepWithNextProperty` in interface `BlockLevelLayoutManager`
Returns:
  the keep-together property

#### addPendingMarks

    protected void addPendingMarks(LayoutContext context)

Adds the unresolved elements for border and padding to a layout context so break possibilities can be properly constructed.

Parameters:
  `context` - the layout context

#### getSpaceBeforeProperty

    protected SpaceProperty getSpaceBeforeProperty()

Returns:
  the space-before property

#### getSpaceAfterProperty

    protected SpaceProperty getSpaceAfterProperty()

Returns:
  the space-after property

#### addKnuthElementsForBorderPaddingBefore

    protected void addKnuthElementsForBorderPaddingBefore(List returnList,
                                                          boolean isFirst)

Creates Knuth elements for before border padding and adds them to the return list.

Parameters:
  `returnList` - return list to add the additional elements to
  `isFirst` - true if this is the first time a layout manager instance needs to generate border and padding

#### addKnuthElementsForBorderPaddingAfter

    protected void addKnuthElementsForBorderPaddingAfter(List returnList,
                                                         boolean isLast)

Creates Knuth elements for after border padding and adds them to the return list.

Parameters:
  `returnList` - return list to add the additional elements to
  `isLast` - true if this is the last time a layout manager instance needs to generate border and padding

#### addKnuthElementsForBreakBefore

    protected boolean addKnuthElementsForBreakBefore(List returnList,
                                                     LayoutContext context)

Creates Knuth elements for break-before and adds them to the return list.

Parameters:
  `returnList` - return list to add the additional elements to
  `context` - the layout context
Returns:
  true if an element has been added due to a break-before.

#### getBreakBefore

    public int getBreakBefore()

Returns the highest priority break-before value on this layout manager or its relevant descendants.

Returns:
  the break-before value (Constants.EN_*)
See Also:
  `BreakOpportunity.getBreakBefore()`

#### addKnuthElementsForBreakAfter

    protected boolean addKnuthElementsForBreakAfter(List returnList,
                                                    LayoutContext context)

Creates Knuth elements for break-after and adds them to the return list.

Parameters:
  `returnList` - return list to add the additional elements to
  `context` - the layout context
Returns:
  true if an element has been added due to a break-after.

#### addKnuthElementsForSpaceBefore

    protected void addKnuthElementsForSpaceBefore(List returnList,
                                                  int alignment)

Creates Knuth elements for space-before and adds them to the return list.

Parameters:
  `returnList` - return list to add the additional elements to
  `alignment` - vertical alignment

#### addKnuthElementsForSpaceAfter

    protected void addKnuthElementsForSpaceAfter(List returnList,
                                                 int alignment)

Creates Knuth elements for space-after and adds them to the return list.

Parameters:
  `returnList` - return list to add the additional elements to
  `alignment` - vertical alignment

#### wrapPositionElements

    protected void wrapPositionElements(List sourceList,
                                        List targetList)

"wrap" the Position inside each element moving the elements from SourceList to targetList

Parameters:
  `sourceList` - source list
  `targetList` - target list receiving the wrapped position elements

#### wrapPositionElements

    protected void wrapPositionElements(List sourceList,
                                        List targetList,
                                        boolean force)

"wrap" the Position inside each element moving the elements from SourceList to targetList

Parameters:
  `sourceList` - source list
  `targetList` - target list receiving the wrapped position elements
  `force` - if true, every Position is wrapped regardless of its LM of origin

#### wrapPositionElement

    protected void wrapPositionElement(ListElement el,
                                       List targetList,
                                       boolean force)

"wrap" the Position inside the given element and add it to the target list.

Parameters:
  `el` - the list element
  `targetList` - target list receiving the wrapped position elements
  `force` - if true, every Position is wrapped regardless of its LM of origin

#### getIPIndents

    protected int getIPIndents()

Returns:
  the sum of start-indent and end-indent

#### getContentAreaIPD

    public int getContentAreaIPD()

Returns the IPD of the content area

Specified by:
  `getContentAreaIPD` in interface `LayoutManager`
Overrides:
  `getContentAreaIPD` in class `AbstractBaseLayoutManager`
Returns:
  the IPD of the content area

#### setContentAreaIPD

    protected void setContentAreaIPD(int contentAreaIPD)

Sets the IPD of the content area

Parameters:
  `contentAreaIPD` - the IPD of the content area

#### getContentAreaBPD

    public int getContentAreaBPD()

Returns the BPD of the content area

Specified by:
  `getContentAreaBPD` in interface `LayoutManager`
Overrides:
  `getContentAreaBPD` in class `AbstractBaseLayoutManager`
Returns:
  the BPD of the content area

#### reset

    public void reset()

Re-initializes this layout manager in order to re-generate its Knuth elements according to a new IPD value.

Specified by:
  `reset` in interface `LayoutManager`
Overrides:
  `reset` in class `AbstractLayoutManager`

#### handleOverflow

    public boolean handleOverflow(int milliPoints)

Whether this LM can handle horizontal overflow error messages (only a BlockContainerLayoutManager can).

Parameters:
  `milliPoints` - horizontal overflow
Returns:
  true if handled by a BlockContainerLayoutManager

#### isRestartAtLM

    public boolean isRestartAtLM()