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| /*
* SimplyHTML, a word processor based on Java, HTML and CSS
* Copyright (C) 2002 Ulrich Hilger
* Copyright (C) 2006 Dimitri Polivaev
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
package com.lightdev.app.shtm;
import java.io.IOException;
import java.io.StringWriter;
import java.io.Writer;
import java.util.Enumeration;
import javax.swing.text.AttributeSet;
import javax.swing.text.BadLocationException;
import javax.swing.text.Document;
import javax.swing.text.Element;
import javax.swing.text.ElementIterator;
import javax.swing.text.MutableAttributeSet;
import javax.swing.text.SimpleAttributeSet;
import javax.swing.text.StyleConstants;
import javax.swing.text.html.CSS;
import javax.swing.text.html.HTML;
import javax.swing.text.html.HTMLDocument;
import javax.swing.text.html.HTMLWriter;
/**
* FixedHTMLWriter
*
*
*/
public class SHTMLWriter extends HTMLWriter {
private Element element;
private Writer writer = null;
private boolean replaceEntities;
private boolean inTextArea;
//final private MutableAttributeSet oConvAttr = new SimpleAttributeSet();
//final private MutableAttributeSet convertedAttributeSet = new SimpleAttributeSet();
private boolean inPre;
public SHTMLWriter(final Writer w, final HTMLDocument doc, final int pos, final int len) {
super(w, doc, pos, len);
writer = w;
}
/** Constructs the SHTMLWriter with a new StringWriter. See also the method
* getWrittenString. */
public SHTMLWriter(final HTMLDocument doc) {
this(new StringWriter(), doc, 0, doc.getLength());
}
public SHTMLWriter(final Writer w, final HTMLDocument doc) {
this(w, doc, 0, doc.getLength());
}
protected ElementIterator getElementIterator() {
if (element == null) {
return super.getElementIterator();
}
return new ElementIterator(element);
}
protected void output(final char[] chars, final int start, final int length) throws IOException {
if (replaceEntities) {
if (chars[start] == ' ') {
chars[start] = '\u00A0';
}
final int last = start + length - 1;
for (int i = start + 1; i < last; i++) {
if (chars[i] == ' ' && (chars[i - 1] == '\u00A0' || chars[i + 1] == ' ')) {
chars[i] = '\u00A0';
}
}
// if(chars[last] == ' '){
// chars[last] = '\u00A0';
// }
}
super.output(chars, start, length);
}
protected void startTag(final Element elem) throws IOException, BadLocationException {
if (matchNameAttribute(elem.getAttributes(), HTML.Tag.PRE)) {
inPre = true;
}
super.startTag(elem);
}
protected void endTag(final Element elem) throws IOException {
if (matchNameAttribute(elem.getAttributes(), HTML.Tag.PRE)) {
inPre = false;
}
super.endTag(elem);
}
protected void text(final Element elem) throws BadLocationException, IOException {
replaceEntities = !inPre;
super.text(elem);
replaceEntities = false;
}
protected void textAreaContent(final AttributeSet attr) throws BadLocationException, IOException {
inTextArea = true;
super.textAreaContent(attr);
inTextArea = false;
}
public void write() throws IOException, BadLocationException {
replaceEntities = false;
super.write();
}
protected void writeLineSeparator() throws IOException {
final boolean pre = replaceEntities;
replaceEntities = false;
super.writeLineSeparator();
replaceEntities = pre;
}
protected void indent() throws IOException {
if (inTextArea) {
return;
}
final boolean pre = replaceEntities;
replaceEntities = false;
super.indent();
replaceEntities = pre;
}
/**
* Iterates over the
* Element tree and controls the writing out of
* all the tags and its attributes.
*
* @exception IOException on any I/O error
* @exception BadLocationException if pos represents an invalid
* location within the document.
*
*/
synchronized void write(Element element) throws IOException, BadLocationException {
this.element = element;
try {
write();
}
catch (final BadLocationException e) {
element = null;
throw e;
}
catch (final IOException e) {
element = null;
throw e;
}
}
/**
* invoke HTML creation for all children of a given element.
*
* @param elem the element which children are to be written as HTML
*/
public void writeChildElements(final Element parentElement) throws IOException, BadLocationException {
Element childElement; //Not necessarily a paragraph element.
for (int i = 0; i < parentElement.getElementCount(); i++) {
childElement = parentElement.getElement(i);
write(childElement);
}
}
protected boolean inRange(final Element next) {
final Document document = next.getDocument();
if (document instanceof SHTMLDocument
&& next.getStartOffset() >= ((SHTMLDocument) document).getLastDocumentPosition()) {
return false;
}
final int startOffset = getStartOffset();
final int endOffset = getEndOffset();
if ((next.getStartOffset() >= startOffset && (next.getStartOffset() < endOffset) || next.getEndOffset() - 1 == endOffset)
|| (startOffset >= next.getStartOffset() && startOffset < next.getEndOffset())) {
return true;
}
return false;
}
/**
* Create an older style of HTML attributes. This will
* convert character level attributes that have a StyleConstants
* mapping over to an HTML tag/attribute. Other CSS attributes
* will be placed in an HTML style attribute.
*/
private static void convertStyleToHTMLStyle(final AttributeSet source, final MutableAttributeSet target) {
if (source == null) {
return;
}
final Enumeration sourceAttributeNames = source.getAttributeNames();
String value = "";
while (sourceAttributeNames.hasMoreElements()) {
final Object sourceAttributeName = sourceAttributeNames.nextElement();
if (sourceAttributeName instanceof CSS.Attribute) {
// default is to store in a HTML style attribute
if (value.length() > 0) {
value += "; ";
}
value += sourceAttributeName + ": " + source.getAttribute(sourceAttributeName);
}
else {
target.addAttribute(sourceAttributeName, source.getAttribute(sourceAttributeName));
}
}
if (value.length() > 0) {
target.addAttribute(HTML.Attribute.STYLE, value);
}
}
/* (non-Javadoc)
* @see javax.swing.text.html.HTMLWriter#writeAttributes(javax.swing.text.AttributeSet)
*/
protected void writeAttributes(final AttributeSet attributeSet) throws IOException {
final Object nameTag = (attributeSet != null) ? attributeSet.getAttribute(StyleConstants.NameAttribute) : null;
final Object endTag = (attributeSet != null) ? attributeSet.getAttribute(HTML.Attribute.ENDTAG) : null;
// write no attributes for end tags
if (nameTag != null && endTag != null && (endTag instanceof String) && ((String) endTag).equals("true")) {
return;
}
if (attributeSet instanceof Element) {
final Element element = (Element) attributeSet;
if (element.isLeaf() || element.getName().equalsIgnoreCase("p-implied")) {
super.writeAttributes(attributeSet);
return;
}
}
//convertedAttributeSet.removeAttributes(convertedAttributeSet);
final MutableAttributeSet convertedAttributeSet = new SimpleAttributeSet();
SHTMLWriter.convertStyleToHTMLStyle(attributeSet, convertedAttributeSet);
final Enumeration attributeNames = convertedAttributeSet.getAttributeNames();
while (attributeNames.hasMoreElements()) {
final Object attributeName = attributeNames.nextElement();
if (attributeName instanceof HTML.Tag || attributeName instanceof StyleConstants
|| attributeName == HTML.Attribute.ENDTAG) {
continue;
}
write(" " + attributeName + "=\"" + convertedAttributeSet.getAttribute(attributeName) + "\"");
}
}
/**
* write an element and all its children. If a given element is reached,
* writing stops with this element. If the end element is a leaf,
* it is written as the last element, otherwise it is not written.
*
* @param e the element to write including its children (if any)
* @param end the last leaf element to write or the branch element
* to stop writing at (whatever applies)
*/
private void writeElementsUntil(final Element e, final Element end) throws IOException, BadLocationException {
if (e.isLeaf()) {
write(e);
}
else {
if (e != end) {
startTag(e);
final int childCount = e.getElementCount();
int index = 0;
while (index < childCount) {
writeElementsUntil(e.getElement(index), end); // drill down in recursion
index++;
}
endTag(e);
}
}
}
/**
* write elements and their children starting at a
* given element until a given element is reached.
* The end element is written as the last element,
* if it is a leaf element.
*
* @param startElement the element to start writing with
* @param endElement the last element to write
*/
void write(final Element startElement, final Element endElement) throws IOException, BadLocationException {
final Element parentElement = startElement.getParentElement();
final int count = parentElement.getElementCount();
int i = 0;
Element e = parentElement.getElement(i);
while (i < count && e != startElement) {
e = parentElement.getElement(i++);
}
while (i < count) {
writeElementsUntil(e, endElement);
e = parentElement.getElement(i++);
}
}
/* (non-Javadoc)
* @see javax.swing.text.html.HTMLWriter#startTag(javax.swing.text.Element)
*/
void writeStartTag(final Element elem) throws IOException, BadLocationException {
// TODO Auto-generated method stub
super.startTag(elem);
}
/* (non-Javadoc)
* @see javax.swing.text.html.HTMLWriter#endTag(javax.swing.text.Element)
*/
void writeEndTag(final Element elem) throws IOException {
// TODO Auto-generated method stub
super.endTag(elem);
}
void writeEndTag(final String elementName) throws IOException {
indent();
write('<');
write('/');
write(elementName);
write('>');
writeLineSeparator();
}
void writeStartTag(final String elementName, final AttributeSet attributes) throws IOException {
indent();
write('<');
write(elementName);
if (attributes != null) {
writeAttributes(attributes);
}
write('>');
writeLineSeparator();
}
public void write(final String string) {
try {
writer.write(string);
}
catch (final IOException ex) {
}
}
public String toString() {
if (writer instanceof StringWriter) {
final StringWriter stringWriter = (StringWriter) writer;
return stringWriter.getBuffer().toString();
}
return super.toString();
}
/** Gets the written string if the writer is a StringWriter, null otherwise. */
String getWrittenString() {
if (writer instanceof StringWriter) {
final StringWriter stringWriter = (StringWriter) writer;
return stringWriter.getBuffer().toString();
}
return null;
}
void removeLastWrittenNewline() {
if (writer instanceof StringWriter) {
final StringWriter stringWriter = (StringWriter) writer;
int charIdx = stringWriter.getBuffer().length();
while (stringWriter.getBuffer().charAt(--charIdx) <= 13) {
stringWriter.getBuffer().deleteCharAt(charIdx);
}
}
}
} |
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