Class TextLayoutManager

Method Details

• 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

• addAreas

  public void addAreas(PositionIterator posIter, LayoutContext context)

  Generate and add areas to parent area. This can either generate an area for each TextArea and each space, or an area containing all text with a parameter controlling the size of the word space. The latter is most efficient for PDF generation. Set size of each area.

  Specified by:

  addAreas in interface LayoutManager

  Overrides:

  addAreas in class LeafNodeLayoutManager

  Parameters:

  posIter - Iterator over Position information returned by this LayoutManager.

  context - LayoutContext for adjustments

• 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 LeafNodeLayoutManager

  Parameters:

  context - the LayoutContext used to store layout information

  alignment - the desired text alignment

  Returns:

  the list of KnuthElements

• addALetterSpaceTo

  public List addALetterSpaceTo(List oldList)

  Tell the LM to modify its data, adding a letter space to the word fragment represented by the given elements, and returning the corrected elements

  Specified by:

  addALetterSpaceTo in interface InlineLevelLayoutManager

  Overrides:

  addALetterSpaceTo in class LeafNodeLayoutManager

  Parameters:

  oldList - the elements which must be given one more letter space

  Returns:

  the new elements replacing the old ones

• addALetterSpaceTo

  public List addALetterSpaceTo(List oldList, int depth)

  Tell the LM to modify its data, adding a letter space to the word fragment represented by the given elements, and returning the corrected elements Only TextLM has a meaningful implementation of this method

  Specified by:

  addALetterSpaceTo in interface InlineLevelLayoutManager

  Overrides:

  addALetterSpaceTo in class LeafNodeLayoutManager

  Parameters:

  oldList - the elements which must be given one more letter space

  depth - the depth at which the Positions for this LM in oldList are found

  Returns:

  the new elements replacing the old ones

• hyphenate

  public void hyphenate(Position pos, HyphContext hyphContext)

  Tell the LM to hyphenate a word

  Specified by:

  hyphenate in interface InlineLevelLayoutManager

  Overrides:

  hyphenate in class LeafNodeLayoutManager

  Parameters:

  pos - the Position referring to the word

  hyphContext - the HyphContext storing hyphenation information

• applyChanges

  public boolean applyChanges(List oldList)

  Tell the LM to apply the changes due to hyphenation

  Specified by:

  applyChanges in interface InlineLevelLayoutManager

  Overrides:

  applyChanges in class LeafNodeLayoutManager

  Parameters:

  oldList - the list of the old elements the changes refer to

  Returns:

  true if the LM had to change its data, false otherwise

• applyChanges

  public boolean applyChanges(List oldList, int depth)

  Tell the LM to apply the changes due to hyphenation Only TextLM has a meaningful implementation of this method

  Specified by:

  applyChanges in interface InlineLevelLayoutManager

  Overrides:

  applyChanges in class LeafNodeLayoutManager

  Parameters:

  oldList - the list of the old elements the changes refer to

  depth - the depth at which the Positions for this LM in oldList are found

  Returns:

  true if the LM had to change its data, false otherwise

• 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 LeafNodeLayoutManager

  Parameters:

  oldList - the elements to replace

  alignment - the desired text alignment

  Returns:

  the updated list of KnuthElements

• getWordChars

  public String getWordChars(Position pos)

  Get the word chars corresponding to the given position.

  Specified by:

  getWordChars in interface InlineLevelLayoutManager

  Overrides:

  getWordChars in class LeafNodeLayoutManager

  Parameters:

  pos - the position referring to the needed word chars.

  Returns:

  the word chars

• getChangeBarList

  public List<ChangeBar> getChangeBarList()

  Description copied from class: AbstractBaseLayoutManager

  Returns the active change bar list.

  Overrides:

  getChangeBarList in class AbstractBaseLayoutManager

  Returns:

  The active change bar list

• toString

  public String toString()

  Overrides:

  toString in class AbstractLayoutManager