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/*******************************************************************************
* Copyright (c) 2005, 2007 committers of openArchitectureWare and others.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* committers of openArchitectureWare - initial API and implementation
*******************************************************************************/
package org.eclipse.xpand2.output;
import java.util.HashMap;
import java.util.Map;
import java.util.Stack;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import org.eclipse.internal.xpand2.ast.TextStatement;
import org.eclipse.internal.xtend.expression.ast.SyntaxElement;
import org.eclipse.internal.xtend.util.Pair;
import org.eclipse.xpand2.XpandExecutionContext;
/**
* *
*
* @author Sven Efftinge (http://www.efftinge.de) *
*/
public class OutputImpl implements Output {
private boolean automaticHyphenation = false;
public void setAutomaticHyphens(boolean automaticHyphenation) {
this.automaticHyphenation = automaticHyphenation;
}
protected Stack<FileHandleImpl> fileHandles = new Stack<FileHandleImpl>();
private final Map<String, Outlet> outlets = new HashMap<String, Outlet>();
public void addOutlet(final Outlet outlet) {
if (outlets.containsKey(outlet.getName())) {
if (outlet.getName() == null)
throw new IllegalArgumentException("A default outlet is already registered!");
else
throw new IllegalArgumentException("An outlet with name " + outlet.getName() + " is already registered!");
}
outlets.put(outlet.getName(), outlet);
}
public Outlet getOutlet (String name) {
return outlets.get (name);
}
protected FileHandle current() {
return (fileHandles.isEmpty() ? null : fileHandles.peek());
}
/**
* DO NOT CALL THIS METHOD - FOR TESTS ONLY
*/
public FileHandle current__testONLY() {
return current();
}
private boolean deleteLine = false;
public void write(final String bytes) {
if (current() != null) {
if (deleteLine) {
String temp = trimUntilNewline(bytes);
removeWSAfterLastNewline(current().getBuffer());
((StringBuffer) current().getBuffer()).append(temp);
} else {
((StringBuffer)current().getBuffer()).append(bytes);
}
}
deleteLine = false;
}
public void removeWSAfterLastNewline(CharSequence cs) {
final StringBuffer buffer = (StringBuffer) cs;
int i = buffer.length();
boolean wsOnly = true;
for (; i > 0 && wsOnly; i--) {
char c = buffer.charAt(i - 1);
wsOnly = Character.isWhitespace(c);
if (wsOnly && isNewLine(c)) {
buffer.delete(i, buffer.length());
return;
}
}
return;
}
private boolean isNewLine(char c) {
return c == '\n' || c == '\r';
}
public String trimUntilNewline(String bytes) {
int i = 0;
boolean wsOnly = true;
for (; i < bytes.length() && wsOnly; i++) {
char c = bytes.charAt(i);
wsOnly = Character.isWhitespace(c);
if (wsOnly && isNewLine(c)) {
if (c == '\r' && i + 1 < bytes.length() && bytes.charAt(i + 1) == '\n')
i++;
return bytes.substring(i + 1);
}
}
return bytes;
}
private final static Pattern p = Pattern.compile("(.+)://(.+)");
public static Pair<Outlet, String> resolveOutlet (Map<String, Outlet> allOutlets, String path, String outletName) {
if (outletName == null) {
final Matcher m = p.matcher(path);
if (m.matches()) {
outletName = m.group(1);
path = m.group(2);
}
}
final Outlet o = allOutlets.get(outletName);
if (o == null) {
if (outletName == null)
throw new IllegalArgumentException ("No default outlet was configured!");
else
throw new IllegalArgumentException ("No outlet with the name " + outletName + " could be found!");
}
return new Pair<Outlet, String> (o, path);
}
public void openFile(String path, String outletName) {
final Pair<Outlet, String> raw = resolveOutlet(outlets, path, outletName);
final Outlet actualOutlet = raw.getFirst();
final String actualPath = raw.getSecond();
fileHandles.push (actualOutlet.createFileHandle (actualPath));
}
public void closeFile() {
final FileHandle fi = fileHandles.pop();
fi.writeAndClose();
}
private final Stack<SyntaxElement> s = new Stack<SyntaxElement>();
public void pushStatement(final SyntaxElement stmt, XpandExecutionContext ctx) {
if (stmt instanceof TextStatement) {
deleteLine = ((TextStatement) stmt).isDeleteLine();
if (automaticHyphenation) {
deleteLine = true;
}
}
s.push(stmt);
}
public SyntaxElement popStatement() {
final SyntaxElement se = s.pop();
return se;
}
}
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