org.apache.fop.layoutmgr

## Class AbstractLayoutManager

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

- All Implemented Interfaces:
    PercentBaseContext, Constants, LayoutManager
  Direct Known Subclasses:
    AbstractPageSequenceLayoutManager, BlockStackingLayoutManager, InlineContainerLayoutManager, InlineStackingLayoutManager, LeafNodeLayoutManager

      public abstract class AbstractLayoutManager
      extends AbstractBaseLayoutManager
      implements Constants

  The base class for most LayoutManagers.

- - ### Field Summary

    Fields
    Modifier and Type | Field and Description
    --- | ---
    `protected java.util.ListIterator<LayoutManager>` | `childLMiter` child LM iterator during getNextKnuthElement phase
    `protected java.util.List<LayoutManager>` | `childLMs` List of child LayoutManagers
    `protected LayoutManager` | `curChildLM` child LM during getNextKnuthElement phase
    `protected java.util.ListIterator` | `fobjIter` Iterator for child LayoutManagers
    `protected LayoutManager` | `parentLayoutManager` Parent LayoutManager for this LayoutManager

    - ### 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
    `AbstractLayoutManager()` Abstract layout manager.
    `AbstractLayoutManager(FObj fo)` Abstract layout manager.

  - ### Method Summary

    Methods
    Modifier and Type | Method and Description
    --- | ---
    `void` | `addAreas(PositionIterator posIter, LayoutContext context)` Tell the layout manager to add all the child areas implied by Position objects which will be returned by the Iterator.
    `void` | `addChildArea(Area childArea)` Add a child area to the current area.
    `void` | `addChildLM(LayoutManager lm)` Add the LM in the argument to the list of child LMs; set this LM as the parent; initialize the LM.
    `void` | `addChildLMs(java.util.List newLMs)` Add the LMs in the argument to the list of child LMs;
    `protected void` | `addId()` Registers the FO's id on the current PageViewport
    `protected void` | `checkEndOfLayout(Position pos)` Checks to see if the incoming `Position` is the last one for this LM, and if so, calls `notifyEndOfLayout()` and cleans up.
    `protected java.util.List<LayoutManager>` | `createChildLMs(int size)` Create the LM instances for the children of the formatting object being handled by this LM.
    `boolean` | `createNextChildLMs(int pos)` Create more child LMs of the parent, up to child LM index pos
    `int` | `getBaselineOffset()` Returns the position of the dominant-baseline of this FO's first descendant line-area.
    `java.util.List` | `getChangedKnuthElements(java.util.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.
    `protected LayoutManager` | `getChildLM()` Return currently active child LayoutManager or null if all children have finished layout.
    `java.util.List<LayoutManager>` | `getChildLMs()`
    `Page` | `getCurrentPage()`
    `PageViewport` | `getCurrentPV()`
    `java.util.List` | `getNextKnuthElements(LayoutContext context, int alignment)` Get a sequence of KnuthElements representing the content of the node assigned to the LM.
    `LayoutManager` | `getParent()` Get the parent layout manager.
    `Area` | `getParentArea(Area childArea)` Return an Area which can contain the passed childArea.
    `PageSequenceLayoutManager` | `getPSLM()` Get the active PageSequenceLayoutManager instance for this layout process.
    `boolean` | `handlingFloat()`
    `boolean` | `hasLineAreaDescendant()` Whether the FO handled by this layout manager has a descendant (including itself) that will generate a line-area.
    `protected boolean` | `hasNextChildLM()` Return indication if getChildLM will return another LM.
    `void` | `initialize()` initialize the layout manager.
    `boolean` | `isFinished()` Tell whether this LayoutManager has handled all of its content.
    `boolean` | `isFirst(Position pos)` Indicates whether the given Position is the first area-generating Position of this LM.
    `boolean` | `isLast(Position pos)` Indicates whether the given Position is the last area-generating Position of this LM.
    `protected java.lang.IllegalStateException` | `newNoLineAreaDescendantException()`
    `protected void` | `notifyEndOfLayout()` Notifies the `PageSequenceLayoutManager` that layout for this LM has ended.
    `Position` | `notifyPos(Position pos)` Adds a Position to the Position participating in the first|last determination by assigning it a unique position index.
    `protected void` | `possiblyRegisterMarkersForTables(java.util.Map<java.lang.String,Marker> markers, boolean isStarting, boolean isFirst, boolean isLast)`
    `void` | `preserveChildrenAtEndOfLayout()`
    `void` | `recreateChildrenLMs()`
    `protected void` | `registerMarkers(boolean isStarting, boolean isFirst, boolean isLast)` Registers the FO's markers on the current PageViewport, and if applicable on the parent TableLM.
    `void` | `reset()` Re-initializes this layout manager in order to re-generate its Knuth elements according to a new IPD value.
    `protected void` | `setCurrentChildLM(LayoutManager childLM)` Set currently active child layout manager.
    `void` | `setFinished(boolean fin)` Set the flag indicating the LayoutManager has handled all of its content.
    `void` | `setParent(LayoutManager lm)` Set the parent layout manager.
    `java.lang.String` | `toString()`
    `protected void` | `transferExtensionAttachments(AreaTreeObject targetArea)` Transfers extension attachments from the formatting object to the area.
    `protected void` | `transferExtensions(AreaTreeObject targetArea)` Transfers extensions (foreign attributes and extension attachments) from the formatting object to the area.
    `protected void` | `transferForeignAttributes(AreaTreeObject targetArea)` Transfers foreign attributes from the formatting object to the area.

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

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

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

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

- - ### Field Detail

    - #### parentLayoutManager

          protected LayoutManager parentLayoutManager

      Parent LayoutManager for this LayoutManager

    - #### childLMs

          protected java.util.List<LayoutManager> childLMs

      List of child LayoutManagers

    - #### fobjIter

          protected java.util.ListIterator fobjIter

      Iterator for child LayoutManagers

    - #### curChildLM

          protected LayoutManager curChildLM

      child LM during getNextKnuthElement phase

    - #### childLMiter

          protected java.util.ListIterator<LayoutManager> childLMiter

      child LM iterator during getNextKnuthElement phase

  - ### Constructor Detail

    - #### AbstractLayoutManager

          public AbstractLayoutManager()

      Abstract layout manager.

    - #### AbstractLayoutManager

          public AbstractLayoutManager(FObj fo)

      Abstract layout manager.
      Parameters:
        `fo` - the formatting object for this layout manager

  - ### Method Detail

    - #### setParent

          public void setParent(LayoutManager lm)

      Set the parent layout manager. The parent layout manager is required for adding areas.
      Specified by:
        `setParent` in interface `LayoutManager`
      Parameters:
        `lm` - the parent layout manager

    - #### getParent

          public LayoutManager getParent()

      Get the parent layout manager.
      Specified by:
        `getParent` in interface `LayoutManager`
      Returns:
        the parent layout manager.

    - #### initialize

          public void initialize()

      initialize the layout manager. Allows each layout manager to calculate often used values.
      Specified by:
        `initialize` in interface `LayoutManager`

    - #### getChildLM

          protected LayoutManager getChildLM()

      Return currently active child LayoutManager or null if all children have finished layout. Note: child must implement LayoutManager! If it doesn't, skip it and print a warning.
      Returns:
        the current child LayoutManager

    - #### setCurrentChildLM

          protected void setCurrentChildLM(LayoutManager childLM)

      Set currently active child layout manager.
      Parameters:
        `childLM` - the child layout manager

    - #### hasNextChildLM

          protected boolean hasNextChildLM()

      Return indication if getChildLM will return another LM.
      Returns:
        true if another child LM is still available

    - #### isFinished

          public boolean isFinished()

      Tell whether this LayoutManager has handled all of its content.
      Specified by:
        `isFinished` in interface `LayoutManager`
      Returns:
        True if there are no more break possibilities, ie. the last one returned represents the end of the content.

    - #### setFinished

          public void setFinished(boolean fin)

      Set the flag indicating the LayoutManager has handled all of its content.
      Specified by:
        `setFinished` in interface `LayoutManager`
      Parameters:
        `fin` - the flag value to be set

    - #### addAreas

          public void addAreas(PositionIterator posIter,
                      LayoutContext context)

      Tell the layout manager to add all the child areas implied by Position objects which will be returned by the Iterator.
      Specified by:
        `addAreas` in interface `LayoutManager`
      Parameters:
        `posIter` - the position iterator
        `context` - the context

    - #### getNextKnuthElements

          public java.util.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`
      Parameters:
        `context` - the LayoutContext used to store layout information
        `alignment` - the desired text alignment
      Returns:
        the list of KnuthElements

    - #### getChangedKnuthElements

          public java.util.List getChangedKnuthElements(java.util.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`
      Parameters:
        `oldList` - the elements to replace
        `alignment` - the desired text alignment
      Returns:
        the updated list of KnuthElements

    - #### getParentArea

          public Area getParentArea(Area childArea)

      Return an Area which can contain the passed childArea. The childArea may not yet have any content, but it has essential traits set. In general, if the LayoutManager already has an Area it simply returns it. Otherwise, it makes a new Area of the appropriate class. It gets a parent area for its area by calling its parent LM. Finally, based on the dimensions of the parent area, it initializes its own area. This includes setting the content IPD and the maximum BPD.
      Specified by:
        `getParentArea` in interface `LayoutManager`
      Parameters:
        `childArea` - the child area for which the parent area is wanted
      Returns:
        the parent area for the given child

    - #### addChildArea

          public void addChildArea(Area childArea)

      Add a child area to the current area. If this causes the maximum dimension of the current area to be exceeded, the parent LM is called to add it.
      Specified by:
        `addChildArea` in interface `LayoutManager`
      Parameters:
        `childArea` - the child area to be added

    - #### createChildLMs

          protected java.util.List<LayoutManager> createChildLMs(int size)

      Create the LM instances for the children of the formatting object being handled by this LM.
      Parameters:
        `size` - the requested number of child LMs
      Returns:
        the list with the preloaded child LMs

    - #### getPSLM

          public PageSequenceLayoutManager getPSLM()

      Get the active PageSequenceLayoutManager instance for this layout process.
      Specified by:
        `getPSLM` in interface `LayoutManager`
      Returns:
        the PageSequenceLayoutManager

    - #### getCurrentPage

          public Page getCurrentPage()

      Returns:
        the `Page` instance corresponding to the current page
      See Also:
        `AbstractPageSequenceLayoutManager.getCurrentPage()`

    - #### getCurrentPV

          public PageViewport getCurrentPV()

      Returns:
        the current page viewport

    - #### createNextChildLMs

          public boolean createNextChildLMs(int pos)

      Create more child LMs of the parent, up to child LM index pos
      Specified by:
        `createNextChildLMs` in interface `LayoutManager`
      Parameters:
        `pos` - index up to which child LMs are requested
      Returns:
        true if requested index does exist

    - #### getChildLMs

          public java.util.List<LayoutManager> getChildLMs()

      Specified by:
        `getChildLMs` in interface `LayoutManager`
      Returns:
        the list of child LMs

    - #### addChildLM

          public void addChildLM(LayoutManager lm)

      Add the LM in the argument to the list of child LMs; set this LM as the parent; initialize the LM.
      Specified by:
        `addChildLM` in interface `LayoutManager`
      Parameters:
        `lm` - the LM to be added

    - #### addChildLMs

          public void addChildLMs(java.util.List newLMs)

      Add the LMs in the argument to the list of child LMs;
      Specified by:
        `addChildLMs` in interface `LayoutManager`
      Parameters:
        `newLMs` - the list of LMs to be added

    - #### notifyPos

          public Position notifyPos(Position pos)

      Adds a Position to the Position participating in the first|last determination by assigning it a unique position index.
      Specified by:
        `notifyPos` in interface `LayoutManager`
      Parameters:
        `pos` - the Position
      Returns:
        the same Position but with a position index

    - #### isFirst

          public boolean isFirst(Position pos)

      Indicates whether the given Position is the first area-generating Position of this LM.
      Parameters:
        `pos` - the Position (must be one with a position index)
      Returns:
        True if it is the first Position

    - #### isLast

          public boolean isLast(Position pos)

      Indicates whether the given Position is the last area-generating Position of this LM.
      Parameters:
        `pos` - the Position (must be one with a position index)
      Returns:
        True if it is the last Position

    - #### hasLineAreaDescendant

          public boolean hasLineAreaDescendant()

      Description copied from interface: `LayoutManager`
      Whether the FO handled by this layout manager has a descendant (including itself) that will generate a line-area.
      Specified by:
        `hasLineAreaDescendant` in interface `LayoutManager`
      Returns:
        `true` if a descendant line-area will be generated, `false` otherwise

    - #### getBaselineOffset

          public int getBaselineOffset()

      Description copied from interface: `LayoutManager`
      Returns the position of the dominant-baseline of this FO's first descendant line-area.

      The behavior of this method is undefined if this FO has no descendant line-area, and an exception may be thrown. See `LayoutManager.hasLineAreaDescendant()`

      Specified by:
        `getBaselineOffset` in interface `LayoutManager`
      Returns:
        this FO's space-before plus the distance from the before-edge of its allocation-rectangle to the dominant-baseline of the first line-area descendant
      See Also:
        `LayoutManager.hasLineAreaDescendant()`

    - #### newNoLineAreaDescendantException

          protected java.lang.IllegalStateException newNoLineAreaDescendantException()

    - #### transferForeignAttributes

          protected void transferForeignAttributes(AreaTreeObject targetArea)

      Transfers foreign attributes from the formatting object to the area.
      Parameters:
        `targetArea` - the area to set the attributes on

    - #### transferExtensionAttachments

          protected void transferExtensionAttachments(AreaTreeObject targetArea)

      Transfers extension attachments from the formatting object to the area.
      Parameters:
        `targetArea` - the area to set the extensions on

    - #### transferExtensions

          protected void transferExtensions(AreaTreeObject targetArea)

      Transfers extensions (foreign attributes and extension attachments) from the formatting object to the area.
      Parameters:
        `targetArea` - the area to set the extensions on

    - #### registerMarkers

          protected void registerMarkers(boolean isStarting,
                             boolean isFirst,
                             boolean isLast)

      Registers the FO's markers on the current PageViewport, and if applicable on the parent TableLM.
      Parameters:
        `isStarting` - boolean indicating whether the markers qualify as 'starting'
        `isFirst` - boolean indicating whether the markers qualify as 'first'
        `isLast` - boolean indicating whether the markers qualify as 'last'

    - #### addId

          protected void addId()

      Registers the FO's id on the current PageViewport

    - #### notifyEndOfLayout

          protected void notifyEndOfLayout()

      Notifies the `PageSequenceLayoutManager` that layout for this LM has ended.

    - #### checkEndOfLayout

          protected void checkEndOfLayout(Position pos)

      Checks to see if the incoming `Position` is the last one for this LM, and if so, calls `notifyEndOfLayout()` and cleans up.
      Parameters:
        `pos` - the `Position` to check

    - #### preserveChildrenAtEndOfLayout

          public void preserveChildrenAtEndOfLayout()

      Overrides:
        `preserveChildrenAtEndOfLayout` in class `AbstractBaseLayoutManager`

    - #### toString

          public java.lang.String toString()

      Overrides:
        `toString` in class `java.lang.Object`

    - #### 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 `AbstractBaseLayoutManager`

    - #### recreateChildrenLMs

          public void recreateChildrenLMs()

      Overrides:
        `recreateChildrenLMs` in class `AbstractBaseLayoutManager`

    - #### possiblyRegisterMarkersForTables

          protected void possiblyRegisterMarkersForTables(java.util.Map<java.lang.String,Marker> markers,
                                              boolean isStarting,
                                              boolean isFirst,
                                              boolean isLast)

    - #### handlingFloat

          public boolean handlingFloat()

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