Package com.openhtmltopdf.css.extend.lib

Class DOMTreeResolver

java.lang.Object

com.openhtmltopdf.css.extend.lib.DOMTreeResolver

All Implemented Interfaces:

TreeResolver

public class DOMTreeResolver
extends Object
implements TreeResolver

Field Summary

Fields

Modifier and Type	Field	Description
private final Map<Node,Map<Node,Integer>>	cachedPositions	We cache element positions for nth-child, odd and even condition matchers.

Fields inherited from interface com.openhtmltopdf.css.extend.TreeResolver

NO_NAMESPACE

Constructor Summary

Constructors

Constructor	Description
DOMTreeResolver()

Method Summary

Modifier and Type	Method	Description
String	getElementName(Object element)	returns the name of the element so that it may match against the selectors
Object	getParentElement(Object element)	returns the parent element of an element, or null if this was the root element
int	getPositionOfElement(Object element)	Returns the index of the position of the submitted element among its element node siblings.
Object	getPreviousSiblingElement(Object element)	The previous sibling element, or null if none exists
boolean	isFirstChildElement(Object element)	returns true if this element is the first child element of its parent
boolean	isLastChildElement(Object element)	returns true if this element is the last child element of its parent
boolean	matchesElement(Object element, String namespaceURI, String name)	Returns true if element has the local name name and namespace URI namespaceURI.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Details

cachedPositions

private final Map<Node,Map<Node,Integer>> cachedPositions

We cache element positions for nth-child, odd and even condition matchers. To avoid scaling with the square of the number of children elements.

Constructor Details

DOMTreeResolver

public DOMTreeResolver()

Method Details

getParentElement

public Object getParentElement(Object element)

Description copied from interface: TreeResolver

returns the parent element of an element, or null if this was the root element

Specified by:

getParentElement in interface TreeResolver

getPreviousSiblingElement

public Object getPreviousSiblingElement(Object element)

Description copied from interface: TreeResolver

The previous sibling element, or null if none exists

Specified by:

getPreviousSiblingElement in interface TreeResolver

getElementName

public String getElementName(Object element)

Description copied from interface: TreeResolver

returns the name of the element so that it may match against the selectors

Specified by:

getElementName in interface TreeResolver

isFirstChildElement

public boolean isFirstChildElement(Object element)

Description copied from interface: TreeResolver

returns true if this element is the first child element of its parent

Specified by:

isFirstChildElement in interface TreeResolver

isLastChildElement

public boolean isLastChildElement(Object element)

Description copied from interface: TreeResolver

returns true if this element is the last child element of its parent

Specified by:

isLastChildElement in interface TreeResolver

matchesElement

public boolean matchesElement(Object element,
 String namespaceURI,
 String name)

Description copied from interface: TreeResolver

Returns true if element has the local name name and namespace URI namespaceURI.

Specified by:

matchesElement in interface TreeResolver

Parameters:

element -

namespaceURI - The namespace to match, may be null to signify any namespace. Use TreeResolver.NO_NAMESPACE to signify that name should only match when there is no namespace defined on element.

name - The name to match, may not be null

getPositionOfElement

public int getPositionOfElement(Object element)

Description copied from interface: TreeResolver

Returns the index of the position of the submitted element among its element node siblings.

Specified by:

getPositionOfElement in interface TreeResolver

Parameters:

element -

Returns:

-1 in case of error, 0 indexed position otherwise