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package org.eclipse.swt.custom;
/*
* Copyright (c) 2000, 2003 IBM Corp. All rights reserved.
* This file is made available under the terms of the Common Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/cpl-v10.html
*/
import org.eclipse.swt.*;
import org.eclipse.swt.graphics.*;
import org.eclipse.swt.internal.CloneableCompatibility;
public class StyleRange implements CloneableCompatibility {
public int start; // style start offset. 0 based from the document start
public int length; // style length.
public Color foreground;
public Color background;
public int fontStyle = SWT.NORMAL; // may be SWT.NORMAL or SWT.BOLD
public StyleRange() {
}
/**
* Create a new style range.
* <p>
*
* @param start start offset of the style
* @param length length of the style
* @param foreground foreground color of the style, null if none
* @param background background color of the style, null if none
*/
public StyleRange(int start, int length, Color foreground, Color background) {
this.start = start;
this.length = length;
this.foreground = foreground;
this.background = background;
}
/**
* Create a new style range.
* <p>
*
* @param start start offset of the style
* @param length length of the style
* @param foreground foreground color of the style, null if none
* @param background background color of the style, null if none
* @param fontStyle font style of the style, may be SWT.NORMAL or SWT.BOLD
*/
public StyleRange(int start, int length, Color foreground, Color background, int fontStyle) {
this.start = start;
this.length = length;
this.foreground = foreground;
this.background = background;
this.fontStyle = fontStyle;
}
/**
* Compare the specified object to this StyleRange and answer if the two
* are equal. The object must be an instance of StyleRange and have the
* same field values.
* <p>
*
* @param object the object to compare with this object
* @return true if the objects are equal, false otherwise
*/
public boolean equals(Object object) {
StyleRange style;
if (object == this) return true;
if (object instanceof StyleRange) style = (StyleRange)object;
else return false;
if (this.start != style.start) return false;
if (this.length != style.length) return false;
if (this.foreground != null) {
if (!this.foreground.equals(style.foreground)) return false;
} else if (style.foreground != null) return false;
if (this.background != null) {
if (!this.background.equals(style.background)) return false;
} else if (style.background != null) return false;
if (this.fontStyle != style.fontStyle) return false;
return true;
}
/**
* Returns an integer hash code for the receiver. Objects which are
* equal answer the same value for this method.
* <p>
*
* @return the receiver's hash
*/
public int hashCode() {
int code = start + length;
if (foreground != null)
code += foreground.hashCode();
if (background != null)
code += background.hashCode();
return code + fontStyle;
}
/**
* Returns whether or not the receiver is unstyled (i.e., does not have any
* style attributes specified).
* <p>
*
* @return true if the receiver is unstyled, false otherwise.
*/
public boolean isUnstyled() {
if (this.foreground != null) return false;
if (this.background != null) return false;
if (this.fontStyle != SWT.NORMAL) return false;
return true;
}
/**
* Compares the specified object to this StyleRange and answer if the two
* are similar. The object must be an instance of StyleRange and have the
* same field values for except for start and length.
* <p>
*
* @param object the object to compare with this object
* @return true if the objects are similar, false otherwise
*/
public boolean similarTo(StyleRange style) {
if (this.foreground != null) {
if (!this.foreground.equals(style.foreground)) return false;
} else if (style.foreground != null) return false;
if (this.background != null) {
if (!this.background.equals(style.background)) return false;
} else if (style.background != null) return false;
if (this.fontStyle != style.fontStyle) return false;
return true;
}
/**
* Answers a new StyleRange with the same values as this StyleRange.
* <p>
*
* @return a shallow copy of this StyleRange
*/
public Object clone() {
StyleRange style = new StyleRange(start, length, foreground, background, fontStyle);
return style;
}
/**
* Answers a string description of the receiver.
* <p>
*
* @return a printable representation for the receiver.
*/
public String toString() {
StringBuffer buf = new StringBuffer();
buf.append(start + "," + length + " fg:" + foreground + " bg:" + background + " fStyle:");
if (fontStyle == SWT.NORMAL) {
buf.append("normal");
} else if (fontStyle == SWT.BOLD) {
buf.append("bold");
}
return buf.toString();
}
}
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