META-INF.modules.java.desktop.classes.javax.swing.text.Element Maven / Gradle / Ivy
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* published by the Free Software Foundation. Oracle designates this
* particular file as subject to the "Classpath" exception as provided
* by Oracle in the LICENSE file that accompanied this code.
*
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
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* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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package javax.swing.text;
/**
* Interface to describe a structural piece of a document. It
* is intended to capture the spirit of an SGML element.
*
* @author Timothy Prinzing
*/
public interface Element {
/**
* Fetches the document associated with this element.
*
* @return the document
*/
public Document getDocument();
/**
* Fetches the parent element. If the element is a root level
* element returns null.
*
* @return the parent element
*/
public Element getParentElement();
/**
* Fetches the name of the element. If the element is used to
* represent some type of structure, this would be the type
* name.
*
* @return the element name
*/
public String getName();
/**
* Fetches the collection of attributes this element contains.
*
* @return the attributes for the element
*/
public AttributeSet getAttributes();
/**
* Fetches the offset from the beginning of the document
* that this element begins at. If this element has
* children, this will be the offset of the first child.
* As a document position, there is an implied forward bias.
*
* @return the starting offset >= 0 and < getEndOffset();
* @see Document
* @see AbstractDocument
*/
public int getStartOffset();
/**
* Fetches the offset from the beginning of the document
* that this element ends at. If this element has
* children, this will be the end offset of the last child.
* As a document position, there is an implied backward bias.
*
* All the default Document implementations
* descend from AbstractDocument.
* AbstractDocument models an implied break at the end of
* the document. As a result of this, it is possible for this to
* return a value greater than the length of the document.
*
* @return the ending offset > getStartOffset() and
* <= getDocument().getLength() + 1
* @see Document
* @see AbstractDocument
*/
public int getEndOffset();
/**
* Gets the child element index closest to the given offset.
* The offset is specified relative to the beginning of the
* document. Returns -1 if the
* Element is a leaf, otherwise returns
* the index of the Element that best represents
* the given location. Returns 0 if the location
* is less than the start offset. Returns
* getElementCount() - 1 if the location is
* greater than or equal to the end offset.
*
* @param offset the specified offset >= 0
* @return the element index >= 0
*/
public int getElementIndex(int offset);
/**
* Gets the number of child elements contained by this element.
* If this element is a leaf, a count of zero is returned.
*
* @return the number of child elements >= 0
*/
public int getElementCount();
/**
* Fetches the child element at the given index.
*
* @param index the specified index >= 0
* @return the child element
*/
public Element getElement(int index);
/**
* Is this element a leaf element? An element that
* may have children, even if it currently
* has no children, would return false.
*
* @return true if a leaf element else false
*/
public boolean isLeaf();
}