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| import java.io.StringReader;
import java.io.StringWriter;
import javax.xml.stream.FactoryConfigurationError;
import javax.xml.stream.XMLInputFactory;
import javax.xml.stream.XMLOutputFactory;
import javax.xml.stream.XMLStreamConstants;
import javax.xml.stream.XMLStreamException;
import javax.xml.stream.XMLStreamReader;
import javax.xml.stream.XMLStreamWriter;
import javax.xml.transform.OutputKeys;
import javax.xml.transform.Source;
import javax.xml.transform.Transformer;
import javax.xml.transform.TransformerException;
import javax.xml.transform.TransformerFactory;
import javax.xml.transform.stream.StreamResult;
import javax.xml.transform.stream.StreamSource;
import org.eclipse.swt.SWT;
import org.eclipse.swt.layout.FillLayout;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Shell;
import org.eclipse.swt.widgets.Text;
public class DemoXmlFormat {
private static final int INDENT = 4;
public static void main(String[] args) {
Display display = new Display();
try {
Shell shell = new Shell(display);
shell.setText("Démo");
shell.setSize(600, 200);
shell.setLayout(new FillLayout());
setText1(shell); // WRAP
setText2(shell); // REGEXP SIMPLE
setText3(shell); // REGEXP ++
setText4(shell); // AUTOMATE
setText5(shell); // XML FORMATTING (TRANSFORMER)
setText6(shell); // XML FORMATTING (STaX)
shell.open();
while (!shell.isDisposed()) {
if (!display.readAndDispatch())
display.sleep();
}
}finally {
display.dispose();
}
}
private static void setText1(Composite parent) {
// WRAP
Text text = new Text(parent, SWT.BORDER | SWT.WRAP | SWT.V_SCROLL);
text.setText(getXML());
}
private static void setText2(Composite parent) {
// REGEXP simple : on passe à la ligne après >
Text text = new Text(parent, SWT.BORDER | SWT.MULTI | SWT.H_SCROLL | SWT.V_SCROLL);
text.setText(getXML().replaceAll(">", ">\n"));
}
private static void setText3(Composite parent) {
// REGEXP ++ : on passe à la ligne après >, on passe à la ligne avant </, sauf s'il est précédé d'un passage à la ligne
Text text = new Text(parent, SWT.BORDER | SWT.MULTI | SWT.H_SCROLL | SWT.V_SCROLL);
text.setText(getXML().replaceAll(">", ">\n").replaceAll("(?<!\n)</","\n</"));
// alternative on passe à la ligne avant </, sauf s'il est précédé d'un >, on passe à la ligne après >
// text.setText(getXML().replaceAll("(?<!>)</","\n</").replaceAll(">", ">\n"));
}
private static void setText4(Composite parent) {
// Automate à état
Text text = new Text(parent, SWT.BORDER | SWT.MULTI | SWT.H_SCROLL | SWT.V_SCROLL);
StringBuilder builder = new StringBuilder();
String s = getXML();
boolean inTag=false;
boolean empty=false;
char previous='\0';
char last='\0';
int indent=0;
boolean open=false;
for(int i=0; i<s.length(); i++) {
char c = s.charAt(i);
if ( last=='\n' ) {
builder.append(getIndent(indent));
}
if ( inTag ) {
switch(c) {
case '/':
if ( previous=='<' ) {
empty=true;
open=false;
builder.delete(builder.length()-1-INDENT, builder.length()-1);
}
indent--;
builder.append(c);
break;
case '>':
builder.append(c);
builder.append('\n');
if (empty) {
empty=false;
}
else if ( open ) {
indent++;
}
open=false;
inTag=false;
break;
default:
builder.append(c);
}
}
else {
switch(c) {
case '<':
open=true;
if ( previous!='\0' ) {
//indent++;
if ( previous!='>' ) {
builder.append('\n');
builder.append(getIndent(indent));
}
}
inTag=true;
break;
}
builder.append(c);
}
previous=c;
last = builder.charAt(builder.length()-1);
}
text.setText(builder.toString());
}
private static void setText5(Composite parent) {
Text text = new Text(parent, SWT.BORDER | SWT.MULTI | SWT.H_SCROLL | SWT.V_SCROLL);
try {
Source input = new StreamSource(new StringReader(getXML()));
StringWriter stringWriter = new StringWriter();
StreamResult output = new StreamResult(stringWriter);
TransformerFactory transformerFactory = TransformerFactory.newInstance();
//transformerFactory.setAttribute("indent-number", 4); // voir autre solution alternative ci-dessous
Transformer transformer = transformerFactory.newTransformer();
transformer.setOutputProperty(OutputKeys.METHOD, "xml");
transformer.setOutputProperty(OutputKeys.INDENT, "yes");
transformer.setOutputProperty(OutputKeys.OMIT_XML_DECLARATION, "yes");
transformer.setOutputProperty("{http://xml.apache.org/xslt}indent-amount", "4");
transformer.transform(input, output);
text.setText(output.getWriter().toString().toString());
} catch (TransformerException e) {
e.printStackTrace();
}
}
private static void setText6(Composite parent) {
Text text = new Text(parent, SWT.BORDER | SWT.MULTI | SWT.H_SCROLL | SWT.V_SCROLL);
try {
XMLStreamReader reader = XMLInputFactory.newInstance().createXMLStreamReader(new StringReader(getXML()));
try {
StringWriter stringWriter = new StringWriter();
XMLStreamWriter writer = XMLOutputFactory.newInstance().createXMLStreamWriter(stringWriter);
int indent=0;
try {
while(reader.hasNext()){
switch(reader.getEventType()) {
case XMLStreamConstants.START_ELEMENT:
writer.writeCharacters(getIndent(indent));
writer.writeStartElement(reader.getLocalName());
for(int i=0; i<reader.getAttributeCount(); i++) {
writer.writeAttribute(reader.getAttributeLocalName(i), reader.getAttributeValue(i));
}
writer.writeCharacters("\n");
indent++;
break;
case XMLStreamConstants.END_ELEMENT:
indent--;
writer.writeCharacters(getIndent(indent));
writer.writeEndElement();
writer.writeCharacters("\n");
break;
case XMLStreamConstants.CHARACTERS:
writer.writeCharacters(getIndent(indent+1));
writer.writeCharacters(reader.getText());
writer.writeCharacters("\n");
break;
}
reader.next();
}
text.setText(stringWriter.toString());
}
finally {
writer.close();
}
}
finally {
reader.close();
}
} catch (XMLStreamException | FactoryConfigurationError e) {
e.printStackTrace();
}
}
private static String getIndent(int indent) {
if ( indent==0 ) {
return "";
}
return String.format("%1$"+(indent*INDENT)+"s", " ");
}
public static String getXML() {
return "<root><elem><subelem>text</subelem></elem><elem><subelem>text</subelem><subelem>text</subelem>text<subelem>text</subelem><empty/><subelem>text</subelem></elem><elem attrb=\"value\">text</elem><empty/></root>";
}
} |
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