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## org.apache.fop.layoutmgr
Class FlowLayoutManager

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

All Implemented Interfaces:
  BlockLevelLayoutManager, Constants, LayoutManager, PercentBaseContext

public class FlowLayoutManager
extends BlockStackingLayoutManager
implements BlockLevelLayoutManager

LayoutManager for an fo:flow object. Its parent LM is the PageSequenceLayoutManager. This LM is responsible for getting columns of the appropriate size and filling them with block-level areas generated by its children.

To do:
  Reintroduce emergency counter (generate error to avoid endless loop)

Nested Class Summary

Nested classes inherited from class org.apache.fop.layoutmgr.BlockStackingLayoutManager
`BlockStackingLayoutManager.MappingPosition, BlockStackingLayoutManager.StackingIter`

Field Summary

Fields inherited from class org.apache.fop.layoutmgr.BlockStackingLayoutManager
`adjustedSpaceAfter, adjustedSpaceBefore, bpUnit, breakBeforeServed, endIndent, firstVisibleMarkServed, foSpaceAfter, foSpaceBefore, parentArea, referenceIPD, startIndent, storedList`

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_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_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_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_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_TABLE, EN_TABLE_FRAGMENT, 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_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_ALT_TEXT, PR_X_BLOCK_PROGRESSION_UNIT, PR_X_DISABLE_COLUMN_BALANCING, PR_X_ORPHAN_CONTENT_LIMIT, PR_X_PTR, PR_X_WIDOW_CONTENT_LIMIT, PR_XML_LANG, PR_Z_INDEX, PROPERTY_COUNT, PROPERTY_MASK`

Constructor Summary
`FlowLayoutManager(PageSequenceLayoutManager pslm, Flow node)` This is the top level layout manager.

Method Summary
`void` | `addAreas(PositionIterator parentIter, LayoutContext layoutContext)` 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 child area to a the correct container, depending on its area class.
`void` | `discardSpace(KnuthGlue spaceGlue)`
`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.
`int` | `getContentAreaBPD()` Returns the BPD of the content area
`int` | `getContentAreaIPD()` Returns the IPD of the content area
`Keep` | `getKeepTogether()` Returns the keep-together strength for this element.
`Keep` | `getKeepWithNext()` Returns the keep-with-next strength for this element.
`Keep` | `getKeepWithPrevious()` Returns the keep-with-previous strength for this element.
`java.util.List` | `getNextKnuthElements(LayoutContext context, int alignment)` Get a sequence of KnuthElements representing the content of the node assigned to the LM
`java.util.List` | `getNextKnuthElements(LayoutContext context, int alignment, Position positionAtIPDChange, LayoutManager restartAtLM)` {@inheritDoc}
`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.
`boolean` | `isRestartable()` Returns if this layout manager is able to re-generate its Knuth elements after an IPD change.
`int` | `negotiateBPDAdjustment(int adj, KnuthElement lastElement)`

Methods inherited from class org.apache.fop.layoutmgr.BlockStackingLayoutManager
`addBlockSpacing, addChildToArea, addInBetweenBreak, addKnuthElementsForBorderPaddingAfter, addKnuthElementsForBorderPaddingBefore, addKnuthElementsForBreakAfter, addKnuthElementsForBreakBefore, addKnuthElementsForSpaceAfter, addKnuthElementsForSpaceBefore, addPendingMarks, createUnitElements, flush, getAuxiliaryPosition, getCurrentArea, getIPIndents, getKeepTogetherProperty, getKeepWithNextProperty, getKeepWithPreviousProperty, getNextKnuthElements, getParentKeepTogether, mustKeepTogether, mustKeepWithNext, mustKeepWithPrevious, neededUnits, notifyEndOfLayout, reset, setContentAreaIPD, setCurrentArea, updateContentAreaIPDwithOverconstrainedAdjust, updateContentAreaIPDwithOverconstrainedAdjust, wrapPositionElement, wrapPositionElements, wrapPositionElements`

Methods inherited from class org.apache.fop.layoutmgr.AbstractLayoutManager
`addChildLM, addChildLMs, addId, addMarkersToPage, checkEndOfLayout, createChildLMs, createNextChildLMs, getChildLM, getChildLMs, getCurrentPage, getCurrentPV, getParent, getPSLM, hasNextChildLM, initialize, isFinished, isFirst, isLast, notifyPos, setCurrentChildLM, setFinished, setParent, toString, transferExtensionAttachments, transferExtensions, transferForeignAttributes`

Methods inherited from class org.apache.fop.layoutmgr.AbstractBaseLayoutManager
`getAncestorBlockAreaBPD, getAncestorBlockAreaIPD, getBaseLength, getFObj, getGeneratesBlockArea, getGeneratesLineArea, getGeneratesReferenceArea, getParentAreaBPD, getParentAreaIPD, getReferenceAreaBPD, getReferenceAreaIPD, 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.BlockLevelLayoutManager
`getKeepTogetherProperty, getKeepWithNextProperty, getKeepWithPreviousProperty, mustKeepTogether, mustKeepWithNext, mustKeepWithPrevious`

Methods inherited from interface org.apache.fop.layoutmgr.LayoutManager
`addChildLM, addChildLMs, createNextChildLMs, getChildLMs, getFObj, getGeneratesBlockArea, getGeneratesLineArea, getGeneratesReferenceArea, getNextKnuthElements, getParent, getPSLM, initialize, isFinished, notifyPos, reset, setFinished, setParent`

Methods inherited from interface org.apache.fop.datatypes.PercentBaseContext
`getBaseLength`

Constructor Detail

### FlowLayoutManager

    public FlowLayoutManager(PageSequenceLayoutManager pslm,
                             Flow node)

  This is the top level layout manager. It is created by the PageSequence FO.

Parameters:
  `pslm` - parent PageSequenceLayoutManager object
  `node` - Flow object

Method Detail

### 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`
  Overrides:
    `getNextKnuthElements` in class `BlockStackingLayoutManager`

### getNextKnuthElements

    public java.util.List getNextKnuthElements(LayoutContext context,
                                               int alignment,
                                               Position positionAtIPDChange,
                                               LayoutManager restartAtLM)

  {@inheritDoc}

### negotiateBPDAdjustment

    public int negotiateBPDAdjustment(int adj,
                                      KnuthElement lastElement)

  Specified by:
    `negotiateBPDAdjustment` in interface `BlockLevelLayoutManager`
  Overrides:
    `negotiateBPDAdjustment` in class `BlockStackingLayoutManager`

### discardSpace

    public void discardSpace(KnuthGlue spaceGlue)

  Specified by:
    `discardSpace` in interface `BlockLevelLayoutManager`
  Overrides:
    `discardSpace` in class `BlockStackingLayoutManager`

### getKeepTogether

    public Keep getKeepTogether()

  Returns the keep-together strength for this element.

  Specified by:
    `getKeepTogether` in interface `BlockLevelLayoutManager`
  Overrides:
    `getKeepTogether` in class `BlockStackingLayoutManager`

### getKeepWithNext

    public Keep getKeepWithNext()

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

  Specified by:
    `getKeepWithNext` in interface `BlockLevelLayoutManager`
  Overrides:
    `getKeepWithNext` in class `BlockStackingLayoutManager`

### getKeepWithPrevious

    public Keep getKeepWithPrevious()

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

  Specified by:
    `getKeepWithPrevious` in interface `BlockLevelLayoutManager`
  Overrides:
    `getKeepWithPrevious` in class `BlockStackingLayoutManager`

### 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`
  Overrides:
    `getChangedKnuthElements` in class `BlockStackingLayoutManager`

### addAreas

    public void addAreas(PositionIterator parentIter,
                         LayoutContext layoutContext)

  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`
  Overrides:
    `addAreas` in class `AbstractLayoutManager`

### addChildArea

    public void addChildArea(Area childArea)

  Add child area to a the correct container, depending on its area class. A Flow can fill at most one area container of any class at any one time. The actual work is done by BlockStackingLM.

  Specified by:
    `addChildArea` in interface `LayoutManager`
  Overrides:
    `addChildArea` in class `BlockStackingLayoutManager`
  Parameters:
    `childArea` - the area to add

### 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`
  Overrides:
    `getParentArea` in class `AbstractLayoutManager`
  Parameters:
    `childArea` - the child area for which the parent area is wanted
  Returns:
    the parent area for the given child

### getContentAreaIPD

    public int getContentAreaIPD()

  Returns the IPD of the content area

  Specified by:
    `getContentAreaIPD` in interface `LayoutManager`
  Overrides:
    `getContentAreaIPD` in class `BlockStackingLayoutManager`
  Returns:
    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 `BlockStackingLayoutManager`
  Returns:
    the BPD of the content area

### isRestartable

    public boolean isRestartable()

  Returns if this layout manager is able to re-generate its Knuth elements after an IPD change.

  Specified by:
    `isRestartable` in interface `LayoutManager`
  Overrides:
    `isRestartable` in class `AbstractBaseLayoutManager`

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