- java.lang.Object
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- javax.swing.text.AbstractDocument.AbstractElement
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- javax.swing.text.AbstractDocument.BranchElement
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- All Implemented Interfaces:
- Serializable, AttributeSet, Element, MutableAttributeSet, TreeNode
- Direct Known Subclasses:
- DefaultStyledDocument.SectionElement, HTMLDocument.BlockElement
- Enclosing class:
- AbstractDocument
public class AbstractDocument.BranchElement extends AbstractDocument.AbstractElement
Implements a composite element that contains other elements.Warning: Serialized objects of this class will not be compatible with future Swing releases. The current serialization support is appropriate for short term storage or RMI between applications running the same version of Swing. As of 1.4, support for long term storage of all JavaBeansTM has been added to the
java.beans
package. Please seeXMLEncoder
.
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Nested Class Summary
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Nested classes/interfaces inherited from interface javax.swing.text.AttributeSet
AttributeSet.CharacterAttribute, AttributeSet.ColorAttribute, AttributeSet.FontAttribute, AttributeSet.ParagraphAttribute
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Field Summary
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Fields inherited from interface javax.swing.text.AttributeSet
NameAttribute, ResolveAttribute
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Constructor Summary
Constructors Constructor and Description AbstractDocument.BranchElement(Element parent, AttributeSet a)
Constructs a composite element that initially contains no children.
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Method Summary
Methods Modifier and Type Method and Description Enumeration
children()
Returns the children of the receiver as anEnumeration
.boolean
getAllowsChildren()
Returns true if the receiver allows children.Element
getElement(int index)
Gets a child element.int
getElementCount()
Gets the number of children for the element.int
getElementIndex(int offset)
Gets the child element index closest to the given model offset.int
getEndOffset()
Gets the ending offset in the model for the element.String
getName()
Gets the element name.int
getStartOffset()
Gets the starting offset in the model for the element.boolean
isLeaf()
Checks whether the element is a leaf.Element
positionToElement(int pos)
Gets the child element that contains the given model position.void
replace(int offset, int length, Element[] elems)
Replaces content with a new set of elements.String
toString()
Converts the element to a string.-
Methods inherited from class javax.swing.text.AbstractDocument.AbstractElement
addAttribute, addAttributes, containsAttribute, containsAttributes, copyAttributes, dump, getAttribute, getAttributeCount, getAttributeNames, getAttributes, getChildAt, getChildCount, getDocument, getIndex, getParent, getParentElement, getResolveParent, isDefined, isEqual, removeAttribute, removeAttributes, removeAttributes, setResolveParent
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Constructor Detail
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AbstractDocument.BranchElement
public AbstractDocument.BranchElement(Element parent, AttributeSet a)
Constructs a composite element that initially contains no children.- Parameters:
parent
- The parent elementa
- the attributes for the element- Since:
- 1.4
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Method Detail
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positionToElement
public Element positionToElement(int pos)
Gets the child element that contains the given model position.- Parameters:
pos
- the position >= 0- Returns:
- the element, null if none
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replace
public void replace(int offset, int length, Element[] elems)
Replaces content with a new set of elements.- Parameters:
offset
- the starting offset >= 0length
- the length to replace >= 0elems
- the new elements
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toString
public String toString()
Converts the element to a string.
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getName
public String getName()
Gets the element name.- Specified by:
getName
in interfaceElement
- Overrides:
getName
in classAbstractDocument.AbstractElement
- Returns:
- the element name
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getStartOffset
public int getStartOffset()
Gets the starting offset in the model for the element.- Specified by:
getStartOffset
in interfaceElement
- Specified by:
getStartOffset
in classAbstractDocument.AbstractElement
- Returns:
- the offset >= 0
- See Also:
Document
,AbstractDocument
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getEndOffset
public int getEndOffset()
Gets the ending offset in the model for the element.- Specified by:
getEndOffset
in interfaceElement
- Specified by:
getEndOffset
in classAbstractDocument.AbstractElement
- Returns:
- the offset >= 0
- Throws:
NullPointerException
- if this element has no children- See Also:
Document
,AbstractDocument
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getElement
public Element getElement(int index)
Gets a child element.- Specified by:
getElement
in interfaceElement
- Specified by:
getElement
in classAbstractDocument.AbstractElement
- Parameters:
index
- the child index, >= 0 && < getElementCount()- Returns:
- the child element, null if none
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getElementCount
public int getElementCount()
Gets the number of children for the element.- Specified by:
getElementCount
in interfaceElement
- Specified by:
getElementCount
in classAbstractDocument.AbstractElement
- Returns:
- the number of children >= 0
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getElementIndex
public int getElementIndex(int offset)
Gets the child element index closest to the given model offset.- Specified by:
getElementIndex
in interfaceElement
- Specified by:
getElementIndex
in classAbstractDocument.AbstractElement
- Parameters:
offset
- the offset >= 0- Returns:
- the element index >= 0
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isLeaf
public boolean isLeaf()
Checks whether the element is a leaf.
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getAllowsChildren
public boolean getAllowsChildren()
Returns true if the receiver allows children.- Specified by:
getAllowsChildren
in interfaceTreeNode
- Specified by:
getAllowsChildren
in classAbstractDocument.AbstractElement
- Returns:
- true if the receiver allows children, otherwise false
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children
public Enumeration children()
Returns the children of the receiver as anEnumeration
.- Specified by:
children
in interfaceTreeNode
- Specified by:
children
in classAbstractDocument.AbstractElement
- Returns:
- the children of the receiver
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