org.apache.fop.layoutmgr.inline

Class LineLayoutManager

java.lang.Object

org.apache.fop.layoutmgr.AbstractBaseLayoutManager

org.apache.fop.layoutmgr.AbstractLayoutManager

org.apache.fop.layoutmgr.inline.InlineStackingLayoutManager

org.apache.fop.layoutmgr.inline.LineLayoutManager

All Implemented Interfaces:

PercentBaseContext, Constants, BlockLevelLayoutManager, InlineLevelLayoutManager, LayoutManager

public class LineLayoutManager
extends InlineStackingLayoutManager
implements BlockLevelLayoutManager

LayoutManager for lines. It builds one or more lines containing inline areas generated by its sub layout managers. A break is found for each line which may contain one of more breaks from the child layout managers. Once a break is found then it is return for the parent layout manager to handle. When the areas are being added to the page this manager creates a line area to contain the inline areas added by the child layout managers.

Nested Class Summary

Nested classes/interfaces inherited from class org.apache.fop.layoutmgr.inline.InlineStackingLayoutManager

InlineStackingLayoutManager.StackingIter

Field Summary

Fields

Modifier and Type	Field and Description
static int	DEFAULT_SPACE_WIDTH this constant is used to create elements when text-align is center: every TextLM descendant of LineLM must use the same value, otherwise the line breaking algorithm does not find the right break point

Fields inherited from class org.apache.fop.layoutmgr.inline.InlineStackingLayoutManager

childLC, extraBPD

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

childLMiter, childLMs, curChildLM, fobjIter, parentLM

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

generatesBlockArea, generatesReferenceArea

Fields inherited from interface org.apache.fop.layoutmgr.BlockLevelLayoutManager

LINE_HEIGHT_ADJUSTMENT, LINE_NUMBER_ADJUSTMENT, NO_ADJUSTMENT, SPACE_AFTER_ADJUSTMENT, SPACE_BEFORE_ADJUSTMENT

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

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

Constructor Summary

Constructors

Constructor and Description
LineLayoutManager(Block block, Length lh, int l, int f) Create a new Line Layout Manager.

Method Summary

Methods

Modifier and Type	Method and Description
void	addAreas(PositionIterator parentIter, LayoutContext context) Add the areas with the break points.
void	addChildArea(Area childArea) Add a child area to the current area.
void	discardSpace(KnuthGlue spaceGlue)
java.util.LinkedList	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 possibile hyphenation points.
boolean	getGeneratesBlockArea() Returns an indication if the layout manager generates a block area.
boolean	getGeneratesLineArea() Returns an indication if the layout manager generates a line area.
java.util.LinkedList	getNextKnuthElements(LayoutContext context, int alignment) Get a sequence of KnuthElements representing the content of the node assigned to the LM
protected boolean	hasLeadingFence(boolean isNotFirst) Line area is always considered to act as a fence.
protected boolean	hasTrailingFence(boolean isNotLast) Line area is always considered to act as a fence.
void	initialize() initialize the layout manager.
boolean	mustKeepTogether()
boolean	mustKeepWithNext()
boolean	mustKeepWithPrevious()
int	negotiateBPDAdjustment(int adj, KnuthElement lastElement)

Methods inherited from class org.apache.fop.layoutmgr.inline.InlineStackingLayoutManager

addALetterSpaceTo, addId, addSpace, applyChanges, clearPrevIPD, getContext, getCurrentArea, getExtraIPD, getPrevIPD, getSpaceEnd, getSpaceStart, getWordChars, hyphenate, removeWordSpace, setChildContext, setCurrentArea, setLMiter, setTraits

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

addChildLM, addChildLMs, addMarkersToPage, createChildLMs, createNextChildLMs, getChildLM, getChildLMs, getCurrentPage, getCurrentPV, getParent, getParentArea, getPSLM, hasNextChildLM, isFinished, isFirst, isLast, notifyPos, setFinished, setParent, toString, transferForeignAttributes

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

getAncestorBlockAreaBPD, getAncestorBlockAreaIPD, getBaseLength, getContentAreaBPD, getContentAreaIPD, getFObj, 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.LayoutManager

addChildLM, addChildLMs, createNextChildLMs, getChildLMs, getContentAreaBPD, getContentAreaIPD, getFObj, getGeneratesReferenceArea, getParent, getParentArea, getPSLM, isFinished, notifyPos, setFinished, setParent

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

getBaseLength

Field Detail

DEFAULT_SPACE_WIDTH

public static final int DEFAULT_SPACE_WIDTH

this constant is used to create elements when text-align is center: every TextLM descendant of LineLM must use the same value, otherwise the line breaking algorithm does not find the right break point

See Also:

Constant Field Values

Constructor Detail

LineLayoutManager

public LineLayoutManager(Block block,
                 Length lh,
                 int l,
                 int f)

Create a new Line Layout Manager. This is used by the block layout manager to create line managers for handling inline areas flowing into line areas.

Parameters:

block - the block formatting object

lh - the default line height

l - the default lead, from top to baseline

f - the default follow, from baseline to bottom

Method Detail

initialize

public void initialize()

initialize the layout manager. Allows each layout manager to calculate often used values.

Specified by:

initialize in interface LayoutManager

Overrides:

initialize in class AbstractLayoutManager

getNextKnuthElements

public java.util.LinkedList 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 alignement

Returns:

the list of KnuthElements

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.

negotiateBPDAdjustment

public int negotiateBPDAdjustment(int adj,
                         KnuthElement lastElement)

Specified by:

negotiateBPDAdjustment in interface BlockLevelLayoutManager

discardSpace

public void discardSpace(KnuthGlue spaceGlue)

Specified by:

discardSpace in interface BlockLevelLayoutManager

getChangedKnuthElements

public java.util.LinkedList 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 possibile 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 InlineStackingLayoutManager

Parameters:

oldList - the elements to replace

alignment - the desired text alignment

Returns:

the updated list of KnuthElements

hasLeadingFence

protected boolean hasLeadingFence(boolean isNotFirst)

Line area is always considered to act as a fence.

Overrides:

hasLeadingFence in class InlineStackingLayoutManager

Parameters:

isNotFirst - ignored

Returns:

always true

hasTrailingFence

protected boolean hasTrailingFence(boolean isNotLast)

Line area is always considered to act as a fence.

Overrides:

hasTrailingFence in class InlineStackingLayoutManager

Parameters:

isNotLast - ignored

Returns:

always true

addAreas

public void addAreas(PositionIterator parentIter,
            LayoutContext context)

Add the areas with the break points.

Specified by:

addAreas in interface LayoutManager

Overrides:

addAreas in class AbstractLayoutManager

Parameters:

parentIter - the iterator of break positions

context - the context for adding areas

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

Overrides:

addChildArea in class AbstractLayoutManager

Parameters:

childArea - the child area to be added

getGeneratesBlockArea

public boolean getGeneratesBlockArea()

Returns an indication if the layout manager generates a block area.

Specified by:

getGeneratesBlockArea in interface LayoutManager

Overrides:

getGeneratesBlockArea in class AbstractBaseLayoutManager

Returns:

True if the layout manager generates a block area

getGeneratesLineArea

public boolean getGeneratesLineArea()

Returns an indication if the layout manager generates a line area.

Specified by:

getGeneratesLineArea in interface LayoutManager

Overrides:

getGeneratesLineArea in class AbstractBaseLayoutManager

Returns:

True if the layout manager generates a line area