| /******************************************************************************* |
| * Copyright (c) 2000, 2006 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.graphics; |
| |
| import org.eclipse.swt.*; |
| |
| /** |
| * <code>TextStyle</code> defines a set of styles that can be applied |
| * to a range of text. |
| * <p> |
| * The hashCode() method in this class uses the values of the public |
| * fields to compute the hash value. When storing instances of the |
| * class in hashed collections, do not modify these fields after the |
| * object has been inserted. |
| * </p> |
| * <p> |
| * Application code does <em>not</em> need to explicitly release the |
| * resources managed by each instance when those instances are no longer |
| * required, and thus no <code>dispose()</code> method is provided. |
| * </p> |
| * |
| * @see TextLayout |
| * @see Font |
| * @see Color |
| * |
| * @since 3.0 |
| */ |
| public class TextStyle { |
| |
| /** |
| * the font of the style |
| */ |
| public Font font; |
| |
| /** |
| * the foreground of the style |
| */ |
| public Color foreground; |
| |
| /** |
| * the background of the style |
| */ |
| public Color background; |
| |
| /** |
| * the underline flag of the style |
| * |
| * @since 3.1 |
| */ |
| public boolean underline; |
| |
| /** |
| * the underline color of the style |
| * |
| * @since 3.4 |
| */ |
| public Color underlineColor; |
| |
| /** |
| * the underline style |
| * |
| * @see SWT#UNDERLINE_SINGLE |
| * @see SWT#UNDERLINE_DOUBLE |
| * @see SWT#UNDERLINE_ERROR |
| * |
| * @since 3.4 |
| */ |
| public int underlineStyle; |
| |
| /** |
| * the strikeout flag of the style |
| * |
| * @since 3.1 |
| */ |
| public boolean strikeout; |
| |
| /** |
| * the strikeout color of the style |
| * |
| * @since 3.4 |
| */ |
| public Color strikeoutColor; |
| |
| /** |
| * the GlyphMetrics of the style |
| * |
| * @since 3.2 |
| */ |
| public GlyphMetrics metrics; |
| |
| /** |
| * the baseline rise of the style. |
| * |
| * @since 3.2 |
| */ |
| public int rise; |
| |
| /** |
| * Create an empty text style. |
| * |
| * @since 3.4 |
| */ |
| public TextStyle () { |
| } |
| |
| /** |
| * Create a new text style with the specified font, foreground |
| * and background. |
| * |
| * @param font the font of the style, <code>null</code> if none |
| * @param foreground the foreground color of the style, <code>null</code> if none |
| * @param background the background color of the style, <code>null</code> if none |
| */ |
| public TextStyle (Font font, Color foreground, Color background) { |
| if (font != null && font.isDisposed()) SWT.error (SWT.ERROR_INVALID_ARGUMENT); |
| if (foreground != null && foreground.isDisposed()) SWT.error (SWT.ERROR_INVALID_ARGUMENT); |
| if (background != null && background.isDisposed()) SWT.error (SWT.ERROR_INVALID_ARGUMENT); |
| this.font = font; |
| this.foreground = foreground; |
| this.background = background; |
| } |
| |
| |
| /** |
| * Create a new text style from an existing text style. |
| * |
| *@param style the style to copy |
| * |
| * @since 3.4 |
| */ |
| public TextStyle (TextStyle style) { |
| if (style == null) SWT.error (SWT.ERROR_INVALID_ARGUMENT); |
| font = style.font; |
| foreground = style.foreground; |
| background = style.background; |
| underline = style.underline; |
| underlineColor = style.underlineColor; |
| underlineStyle = style.underlineStyle; |
| strikeout = style.strikeout; |
| strikeoutColor = style.strikeoutColor; |
| metrics = style.metrics; |
| rise = style.rise; |
| } |
| |
| /** |
| * 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) { |
| if (object == this) return true; |
| if (object == null) return false; |
| if (!(object instanceof TextStyle)) return false; |
| TextStyle style = (TextStyle)object; |
| if (foreground != null) { |
| if (!foreground.equals(style.foreground)) return false; |
| } else if (style.foreground != null) return false; |
| if (background != null) { |
| if (!background.equals(style.background)) return false; |
| } else if (style.background != null) return false; |
| if (font != null) { |
| if (!font.equals(style.font)) return false; |
| } else if (style.font != null) return false; |
| if (metrics != null || style.metrics != null) return false; |
| if (underline != style.underline) return false; |
| if (strikeout != style.strikeout) return false; |
| if (rise != style.rise) return false; |
| if (underlineColor != null) { |
| if (!underlineColor.equals(style.underlineColor)) return false; |
| } else if (style.underlineColor != null) return false; |
| if (strikeoutColor != null) { |
| if (!strikeoutColor.equals(style.strikeoutColor)) return false; |
| } else if (style.strikeoutColor != null) return false; |
| if (underlineStyle != style.underlineStyle) return false; |
| return true; |
| } |
| |
| /** |
| * 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 hash = 0; |
| if (foreground != null) hash ^= foreground.hashCode(); |
| if (background != null) hash ^= background.hashCode(); |
| if (font != null) hash ^= font.hashCode(); |
| if (metrics != null) hash ^= metrics.hashCode(); |
| if (underline) hash ^= hash; |
| if (strikeout) hash ^= hash; |
| hash ^= rise; |
| if (underlineColor != null) hash ^= underlineColor.hashCode(); |
| if (strikeoutColor != null) hash ^= strikeoutColor.hashCode(); |
| hash ^= underlineStyle; |
| return hash; |
| } |
| |
| /** |
| * Returns a string containing a concise, human-readable |
| * description of the receiver. |
| * |
| * @return a string representation of the <code>TextStyle</code> |
| */ |
| public String toString () { |
| StringBuffer buffer = new StringBuffer("TextStyle {"); |
| int startLength = buffer.length(); |
| if (font != null) { |
| if (buffer.length() > startLength) buffer.append(", "); |
| buffer.append("font="); |
| buffer.append(font); |
| } |
| if (foreground != null) { |
| if (buffer.length() > startLength) buffer.append(", "); |
| buffer.append("foreground="); |
| buffer.append(foreground); |
| } |
| if (background != null) { |
| if (buffer.length() > startLength) buffer.append(", "); |
| buffer.append("background="); |
| buffer.append(background); |
| } |
| if (underline) { |
| if (buffer.length() > startLength) buffer.append(", "); |
| buffer.append("underlined"); |
| } |
| if (strikeout) { |
| if (buffer.length() > startLength) buffer.append(", "); |
| buffer.append("striked out"); |
| } |
| if (rise != 0) { |
| if (buffer.length() > startLength) buffer.append(", "); |
| buffer.append("rise="); |
| buffer.append(rise); |
| } |
| if (metrics != null) { |
| if (buffer.length() > startLength) buffer.append(", "); |
| buffer.append("metrics="); |
| buffer.append(metrics); |
| } |
| buffer.append("}"); |
| return buffer.toString(); |
| } |
| |
| } |