--- /dev/null
+/*******************************************************************************
+ * Copyright (c) 2000, 2011 IBM Corporation and others.
+ *
+ * This program and the accompanying materials
+ * are made available under the terms of the Eclipse Public License 2.0
+ * which accompanies this distribution, and is available at
+ * https://www.eclipse.org/legal/epl-2.0/
+ *
+ * SPDX-License-Identifier: EPL-2.0
+ *
+ * Contributors:
+ * IBM Corporation - initial API and implementation
+ *******************************************************************************/
+package org.eclipse.swt.custom;
+
+import org.eclipse.swt.*;
+import org.eclipse.swt.graphics.*;
+
+/**
+ * <code>StyleRange</code> defines a set of styles for a specified
+ * 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>
+ *
+ * @see <a href="http://www.eclipse.org/swt/">Sample code and further information</a>
+ */
+public class StyleRange extends TextStyle implements Cloneable {
+
+ /**
+ * the start offset of the range, zero-based from the document start
+ */
+ public int start;
+
+ /**
+ * the length of the range
+ */
+ public int length;
+
+ /**
+ * the font style of the range. It may be a combination of
+ * SWT.NORMAL, SWT.ITALIC or SWT.BOLD
+ *
+ * Note: the font style is not used if the <code>font</code> attribute
+ * is set
+ */
+ public int fontStyle = SWT.NORMAL;
+
+/**
+ * Create a new style range with no styles
+ *
+ * @since 3.2
+ */
+public StyleRange() {
+}
+
+/**
+ * Create a new style range from an existing text style.
+ *
+ * @param style the text style to copy
+ *
+ * @since 3.4
+ */
+public StyleRange(TextStyle style) {
+ super(style);
+}
+
+/**
+ * Create a new style range.
+ *
+ * @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) {
+ super(null, foreground, background);
+ this.start = start;
+ this.length = length;
+}
+
+/**
+ * Create a new style range.
+ *
+ * @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, length, foreground, 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()
+ */
+@Override
+public boolean equals(Object object) {
+ if (object == this) return true;
+ if (object instanceof StyleRange) {
+ StyleRange style = (StyleRange)object;
+ if (start != style.start) return false;
+ if (length != style.length) return false;
+ return similarTo(style);
+ }
+ return false;
+}
+
+/**
+ * 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)
+ */
+@Override
+public int hashCode() {
+ return super.hashCode() ^ fontStyle;
+}
+boolean isVariableHeight() {
+ return font != null || (metrics != null && (metrics.ascent != 0 || metrics.descent != 0)) || rise != 0;
+}
+/**
+ * Returns whether or not the receiver is unstyled (i.e., does not have any
+ * style attributes specified).
+ *
+ * @return true if the receiver is unstyled, false otherwise.
+ */
+public boolean isUnstyled() {
+ if (font != null) return false;
+ if (rise != 0) return false;
+ if (metrics != null) return false;
+ if (foreground != null) return false;
+ if (background != null) return false;
+ if (fontStyle != SWT.NORMAL) return false;
+ if (underline) return false;
+ if (strikeout) return false;
+ if (borderStyle != SWT.NONE) 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.
+ *
+ * @param style the object to compare with this object
+ * @return true if the objects are similar, false otherwise
+ */
+public boolean similarTo(StyleRange style) {
+ if (!super.equals(style)) return false;
+ if (fontStyle != style.fontStyle) return false;
+ return true;
+}
+
+/**
+ * Returns a new StyleRange with the same values as this StyleRange.
+ *
+ * @return a shallow copy of this StyleRange
+ */
+@Override
+public Object clone() {
+ try {
+ return super.clone();
+ } catch (CloneNotSupportedException e) {
+ return null;
+ }
+}
+
+/**
+ * Returns a string containing a concise, human-readable
+ * description of the receiver.
+ *
+ * @return a string representation of the StyleRange
+ */
+@Override
+public String toString() {
+ StringBuilder buffer = new StringBuilder();
+ buffer.append("StyleRange {");
+ buffer.append(start);
+ buffer.append(", ");
+ buffer.append(length);
+ buffer.append(", fontStyle=");
+ switch (fontStyle) {
+ case SWT.BOLD:
+ buffer.append("bold");
+ break;
+ case SWT.ITALIC:
+ buffer.append("italic");
+ break;
+ case SWT.BOLD | SWT.ITALIC:
+ buffer.append("bold-italic");
+ break;
+ default:
+ buffer.append("normal");
+ }
+ String str = super.toString();
+ int index = str.indexOf('{');
+ str = str.substring(index + 1);
+ if (str.length() > 1) buffer.append(", ");
+ buffer.append(str);
+ return buffer.toString();
+}
+}
Code Review / simantics / platform.git / blobdiff