* When a document is first made available to the DOM, there is only * one Text object for each block of adjacent plain-text. Users (ie, * applications) may create multiple adjacent Texts during editing -- * see {@link org.w3c.dom.Element#normalize} for discussion. *
* Note that CDATASection is a subclass of Text. This is conceptually
* valid, since they're really just two different ways of quoting
* characters when they're written out as part of an XML stream.
*
* @version $Id: TextImpl.java,v 1.22 2004/02/10 17:09:45 elena Exp $
* @since PR-DOM-Level-1-19980818.
*/
public class TextImpl
extends CharacterDataImpl
implements CharacterData, Text {
//
// Constants
//
/** Serialization version. */
static final long serialVersionUID = -5294980852957403469L;
//
// Constructors
//
/** Default constructor */
public TextImpl(){}
/** Factory constructor. */
public TextImpl(CoreDocumentImpl ownerDoc, String data) {
super(ownerDoc, data);
}
/**
* NON-DOM: resets node and sets specified values for the current node
*
* @param ownerDoc
* @param data
*/
public void setValues(CoreDocumentImpl ownerDoc, String data){
flags=0;
nextSibling = null;
previousSibling=null;
setOwnerDocument(ownerDoc);
super.data = data;
}
//
// Node methods
//
/**
* A short integer indicating what type of node this is. The named
* constants for this value are defined in the org.w3c.dom.Node interface.
*/
public short getNodeType() {
return Node.TEXT_NODE;
}
/** Returns the node name. */
public String getNodeName() {
return "#text";
}
/**
* NON-DOM: Set whether this Text is ignorable whitespace.
*/
public void setIgnorableWhitespace(boolean ignore) {
if (needsSyncData()) {
synchronizeData();
}
isIgnorableWhitespace(ignore);
} // setIgnorableWhitespace(boolean)
/**
* DOM L3 Core CR - Experimental
*
* Returns whether this text node contains
* element content whitespace, often abusively called "ignorable whitespace".
* The text node is determined to contain whitespace in element content
* during the load of the document or if validation occurs while using
* Document.normalizeDocument().
* @since DOM Level 3
*/
public boolean isElementContentWhitespace() {
// REVISIT: is this implemenation correct?
if (needsSyncData()) {
synchronizeData();
}
return internalIsIgnorableWhitespace();
}
/**
* DOM Level 3 WD - Experimental.
* Returns all text of Text nodes logically-adjacent text
* nodes to this node, concatenated in document order.
* @since DOM Level 3
*/
public String getWholeText(){
if (needsSyncData()) {
synchronizeData();
}
if (nextSibling == null) {
return data;
}
if (fBufferStr == null){
fBufferStr = new StringBuffer();
}
else {
fBufferStr.setLength(0);
}
if (data != null && data.length() != 0) {
fBufferStr.append(data);
}
getWholeText(nextSibling, fBufferStr);
return fBufferStr.toString();
}
/**
* Concatenates the text of all logically-adjacent text nodes
*
* @param node
* @param buffer
* @return true - if execution was stopped because the type of node
* other than EntityRef, Text, CDATA is encountered, otherwise
* return false
*/
private boolean getWholeText(Node node, StringBuffer buffer){
String text;
while (node != null) {
short type = node.getNodeType();
if (type == Node.ENTITY_REFERENCE_NODE) {
if (getWholeText(node.getFirstChild(), buffer)){
return true;
}
}
else if (type == Node.TEXT_NODE ||
type == Node.CDATA_SECTION_NODE) {
((NodeImpl)node).getTextContent(buffer);
}
else {
return true;
}
node = node.getNextSibling();
}
return false;
}
/**
* DOM Level 3 WD - Experimental.
*/
public Text replaceWholeText(String content)
throws DOMException{
if (needsSyncData()) {
synchronizeData();
}
// make sure we can make the replacement
if (!canModify(nextSibling)) {
throw new DOMException(DOMException.NO_MODIFICATION_ALLOWED_ERR,
DOMMessageFormatter.formatMessage(DOMMessageFormatter.DOM_DOMAIN, "NO_MODIFICATION_ALLOWED_ERR", null));
}
Node parent = this.getParentNode();
if (content == null || content.length() == 0) {
// remove current node
if (parent !=null) { // check if node in the tree
parent.removeChild(this);
return null;
}
}
Text currentNode = null;
if (isReadOnly()){
Text newNode = this.ownerDocument().createTextNode(content);
if (parent !=null) { // check if node in the tree
parent.insertBefore(newNode, this);
parent.removeChild(this);
currentNode = newNode;
} else {
return newNode;
}
} else {
this.setData(content);
currentNode = this;
}
Node sibling = currentNode.getNextSibling();
while ( sibling !=null) {
parent.removeChild(sibling);
sibling = currentNode.getNextSibling();
}
return currentNode;
}
/**
* If any EntityReference to be removed has descendants
* that are not EntityReference, Text, or CDATASection
* nodes, the replaceWholeText method must fail before
* performing any modification of the document, raising a
* DOMException with the code NO_MODIFICATION_ALLOWED_ERR.
*
* @param node
* @return true - can replace text
* false - can't replace exception must be raised
*/
private boolean canModify(Node node){
while (node != null) {
short type = node.getNodeType();
if (type == Node.ENTITY_REFERENCE_NODE) {
if (!canModify(node.getFirstChild())){
return false;
}
}
else if (type != Node.TEXT_NODE &&
type != Node.CDATA_SECTION_NODE) {
return false;
}
node = node.getNextSibling();
}
return true;
}
/**
* NON-DOM: Returns whether this Text is ignorable whitespace.
*/
public boolean isIgnorableWhitespace() {
if (needsSyncData()) {
synchronizeData();
}
return internalIsIgnorableWhitespace();
} // isIgnorableWhitespace():boolean
//
// Text methods
//
/**
* Break a text node into two sibling nodes. (Note that if the
* current node has no parent, they won't wind up as "siblings" --
* they'll both be orphans.)
*
* @param offset The offset at which to split. If offset is at the
* end of the available data, the second node will be empty.
*
* @return A reference to the new node (containing data after the
* offset point). The original node will contain data up to that
* point.
*
* @throws DOMException(INDEX_SIZE_ERR) if offset is <0 or >length.
*
* @throws DOMException(NO_MODIFICATION_ALLOWED_ERR) if node is read-only.
*/
public Text splitText(int offset)
throws DOMException {
if (isReadOnly()) {
throw new DOMException(
DOMException.NO_MODIFICATION_ALLOWED_ERR,
DOMMessageFormatter.formatMessage(DOMMessageFormatter.DOM_DOMAIN, "NO_MODIFICATION_ALLOWED_ERR", null));
}
if (needsSyncData()) {
synchronizeData();
}
if (offset < 0 || offset > data.length() ) {
throw new DOMException(DOMException.INDEX_SIZE_ERR,
DOMMessageFormatter.formatMessage(DOMMessageFormatter.DOM_DOMAIN, "INDEX_SIZE_ERR", null));
}
// split text into two separate nodes
Text newText =
getOwnerDocument().createTextNode(data.substring(offset));
setNodeValue(data.substring(0, offset));
// insert new text node
Node parentNode = getParentNode();
if (parentNode != null) {
parentNode.insertBefore(newText, nextSibling);
}
return newText;
} // splitText(int):Text
/**
* NON-DOM (used by DOMParser): Reset data for the node.
*/
public void replaceData (String value){
data = value;
}
/**
* NON-DOM (used by DOMParser: Sets data to empty string.
* Returns the value the data was set to.
*/
public String removeData (){
String olddata=data;
data = "";
return olddata;
}
} // class TextImpl