| /******************************************************************************* |
| * Copyright (c) 2000, 2005 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.swt.custom; |
| |
| 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, SWT.ITALIC or SWT.BOLD |
| public boolean underline; |
| public boolean strikeout; |
| |
| 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, SWT.ITALIC 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; |
| } |
| |
| /** |
| * Compares the argument to the receiver, and returns true |
| * if they represent the <em>same</em> object using a class |
| * specific comparison. |
| * |
| * @param object the object to compare with this object |
| * @return <code>true</code> if the object is the same as this object and <code>false</code> otherwise |
| * |
| * @see #hashCode() |
| */ |
| 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; |
| return similarTo(style); |
| } |
| /** |
| * Returns an integer hash code for the receiver. Any two |
| * objects that return <code>true</code> when passed to |
| * <code>equals</code> must return the same value for this |
| * method. |
| * |
| * @return the receiver's hash |
| * |
| * @see #equals(Object) |
| */ |
| 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; |
| if (this.underline) return false; |
| if (this.strikeout) 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 style 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; |
| if (this.underline != style.underline) return false; |
| if (this.strikeout != style.strikeout) 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); |
| style.underline = this.underline; |
| style.strikeout = this.strikeout; |
| return style; |
| } |
| /** |
| * Returns a string containing a concise, human-readable |
| * description of the receiver. |
| * |
| * @return a string representation of the event |
| */ |
| public String toString() { |
| StringBuffer buf = new StringBuffer(); |
| buf.append(start + "," + length + " fg:" + foreground + " bg:" + background + " fStyle:"); |
| switch (fontStyle) { |
| case SWT.BOLD: |
| buf.append("bold"); |
| break; |
| case SWT.ITALIC: |
| buf.append("italic"); |
| break; |
| case SWT.BOLD | SWT.ITALIC: |
| buf.append("bold-italic"); |
| break; |
| default: |
| buf.append("normal"); |
| } |
| if (underline) buf.append(" underline"); |
| if (strikeout) buf.append(" strikeout"); |
| return buf.toString(); |
| } |
| } |