/*******************************************************************************
* Copyright (c) 2000, 2007 IBM Corporation 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:
* IBM Corporation - initial API and implementation
*******************************************************************************/
package org.eclipse.wst.jsdt.internal.ui.viewsupport;
import java.util.ArrayList;
import java.util.Collections;
import java.util.Iterator;
import java.util.List;
public class ColoredString {
public static class Style {
private final String fForegroundColorName;
public Style(String foregroundColorName) {
fForegroundColorName= foregroundColorName;
}
public String getForegroundColorName() {
return fForegroundColorName;
}
}
public static final Style DEFAULT_STYLE= null;
private StringBuffer fBuffer;
private ArrayList fRanges;
public ColoredString() {
fBuffer= new StringBuffer();
fRanges= null;
}
public ColoredString(String text) {
this(text, ColoredString.DEFAULT_STYLE);
}
public ColoredString(String text, Style style) {
this();
append(text, style);
}
public String getString() {
return fBuffer.toString();
}
public int length() {
return fBuffer.length();
}
public Iterator getRanges() {
if (!hasRanges())
return Collections.EMPTY_LIST.iterator();
return getRangesList().iterator();
}
public ColoredString append(String text) {
return append(text, DEFAULT_STYLE);
}
public ColoredString append(char ch) {
return append(String.valueOf(ch), DEFAULT_STYLE);
}
public ColoredString append(ColoredString string) {
int offset= fBuffer.length();
fBuffer.append(string.getString());
for (Iterator iterator= string.getRanges(); iterator.hasNext();) {
StyleRange curr= (StyleRange) iterator.next();
addRange(new StyleRange(offset + curr.offset, curr.length, curr.style));
}
return this;
}
public ColoredString append(String text, Style style) {
if (text.length() == 0)
return this;
int offset= fBuffer.length();
fBuffer.append(text);
if (style != null) {
int nRanges= getNumberOfRanges();
if (nRanges > 0) {
StyleRange last= getRange(nRanges - 1);
if (last.offset + last.length == offset && style.equals(last.style)) {
last.length += text.length();
return this;
}
}
addRange(new StyleRange(offset, text.length(), style));
}
return this;
}
public void colorize(int offset, int length, Style style) {
if (offset < 0 || offset + length > fBuffer.length()) {
throw new IllegalArgumentException("Invalid offset (" + offset + ") or length (" + length + ")"); //$NON-NLS-1$//$NON-NLS-2$//$NON-NLS-3$
}
int insertPos= 0;
int nRanges= getNumberOfRanges();
for (int i= 0; i < nRanges; i++) {
StyleRange curr= getRange(i);
if (curr.offset + curr.length <= offset) {
insertPos= i + 1;
}
}
if (insertPos < nRanges) {
StyleRange curr= getRange(insertPos);
if (curr.offset > offset + length) {
throw new IllegalArgumentException("Overlapping ranges"); //$NON-NLS-1$
}
}
addRange(insertPos, new StyleRange(offset, length, style));
}
/* (non-Javadoc)
* @see java.lang.Object#toString()
*/
public String toString() {
return fBuffer.toString();
}
private boolean hasRanges() {
return fRanges != null && !fRanges.isEmpty();
}
private int getNumberOfRanges() {
return fRanges == null ? 0 : fRanges.size();
}
private StyleRange getRange(int index) {
if (fRanges != null) {
return (StyleRange) fRanges.get(index);
}
throw new IndexOutOfBoundsException();
}
private void addRange(StyleRange range) {
getRangesList().add(range);
}
private void addRange(int index, StyleRange range) {
getRangesList().add(index, range);
}
private List getRangesList() {
if (fRanges == null)
fRanges= new ArrayList(2);
return fRanges;
}
public static class StyleRange {
public int offset;
public int length;
public Style style;
public StyleRange(int offset, int length, Style style) {
this.offset= offset;
this.length= length;
this.style= style;
}
}
}