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org.eclipse.jface.viewers.StyledString Maven / Gradle / Ivy

// RAP [bm]:
///*******************************************************************************
// * Copyright (c) 2008 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.jface.viewers;
//
//import java.util.ArrayList;
//import java.util.List;
//
//import org.eclipse.jface.preference.JFacePreferences;
//import org.eclipse.jface.resource.ColorRegistry;
//import org.eclipse.jface.resource.JFaceResources;
//import org.eclipse.swt.custom.StyleRange;
//import org.eclipse.swt.graphics.TextStyle;
//
///**
// * A mutable string with styled ranges. All ranges mark substrings of the string
// * and do not overlap. Styles are applied using instances of {@link Styler} to
// * compute the result of {@link #getStyleRanges()}.
// * 
// * The styled string can be built in the following two ways:
// * 
    // *
  • new strings with stylers can be appended
  • // *
  • stylers can by applied to ranges of the existing string
  • // *
// * // *

// * This class may be instantiated; it is not intended to be subclassed. // *

// * // * @since 1.1 // */ //public class StyledString { // // /** // * A styler will be asked to apply its styles to one ore more ranges in the // * {@link StyledString}. // * // */ // public static abstract class Styler { // // /** // * Applies the styles represented by this object to the given textStyle. // * // * @param textStyle // * the {@link TextStyle} to modify // */ // public abstract void applyStyles(TextStyle textStyle); // } // // /** // * A built-in styler using the {@link JFacePreferences#QUALIFIER_COLOR} // * managed in the JFace color registry (See // * {@link JFaceResources#getColorRegistry()}). // */ // public static final Styler QUALIFIER_STYLER = createColorRegistryStyler( // JFacePreferences.QUALIFIER_COLOR, null); // // /** // * A built-in styler using the {@link JFacePreferences#COUNTER_COLOR} // * managed in the JFace color registry (See // * {@link JFaceResources#getColorRegistry()}). // */ // public static final Styler COUNTER_STYLER = createColorRegistryStyler( // JFacePreferences.COUNTER_COLOR, null); // // /** // * A built-in styler using the {@link JFacePreferences#DECORATIONS_COLOR} // * managed in the JFace color registry (See // * {@link JFaceResources#getColorRegistry()}). // */ // public static final Styler DECORATIONS_STYLER = createColorRegistryStyler( // JFacePreferences.DECORATIONS_COLOR, null); // // /** // * Creates a styler that takes the given foreground and background colors // * from the JFace color registry. // * // * @param foregroundColorName // * the color name for the foreground color // * @param backgroundColorName // * the color name for the background color // * // * @return the created style // */ // public static Styler createColorRegistryStyler(String foregroundColorName, // String backgroundColorName) { // return new DefaultStyler(foregroundColorName, backgroundColorName); // } // // private static final StyleRange[] EMPTY = new StyleRange[0]; // private StringBuffer fBuffer; // private StyleRunList fStyleRuns; // // /** // * Creates an empty {@link StyledString}. // */ // public StyledString() { // fBuffer = new StringBuffer(); // fStyleRuns = null; // } // // /** // * Creates an {@link StyledString} initialized with a string without // * a style associated. // * // * @param string // * the string // */ // public StyledString(String string) { // this(string, null); // } // // /** // * Creates an {@link StyledString} initialized with a string and a // * style. // * // * @param string // * the string // * @param styler // * the styler for the string or null to not // * associated a styler. // */ // public StyledString(String string, Styler styler) { // this(); // append(string, styler); // } // // /** // * Returns the string of this {@link StyledString}. // * // * @return the current string of this {@link StyledString}. // */ // public String getString() { // return fBuffer.toString(); // } // // /** // * Returns the string of this {@link StyledString}. // * // * @return the current string of this {@link StyledString}. // */ // public String toString() { // return getString(); // } // // /** // * Returns the length of the string of this {@link StyledString}. // * // * @return the length of the current string // */ // public int length() { // return fBuffer.length(); // } // // /** // * Appends a string to the {@link StyledString}. The appended string // * will have no associated styler. // * // * @param string // * the string to append // * @return returns a reference to this object // */ // public StyledString append(String string) { // return append(string, null); // } // // /** // * Appends the string representation of the given character array // * to the {@link StyledString}. The appended // * character array will have no associated styler. // * // * @param chars // * the character array to append // * @return returns a reference to this object // */ // public StyledString append(char[] chars) { // return append(chars, null); // } // // /** // * Appends the string representation of the given character // * to the {@link StyledString}. The appended // * character will have no associated styler. // * // * @param ch // * the character to append // * @return returns a reference to this object // */ // public StyledString append(char ch) { // return append(String.valueOf(ch), null); // } // // /** // * Appends a string with styles to the {@link StyledString}. // * // * @param string // * the string to append // * @return returns a reference to this object // */ // public StyledString append(StyledString string) { // if (string.length() == 0) { // return this; // } // // int offset = fBuffer.length(); // fBuffer.append(string.toString()); // // List otherRuns = string.fStyleRuns; // if (otherRuns != null && !otherRuns.isEmpty()) { // for (int i = 0; i < otherRuns.size(); i++) { // StyleRun curr = (StyleRun) otherRuns.get(i); // if (i == 0 && curr.offset != 0) { // appendStyleRun(null, offset); // appended string will // // start with the default // // color // } // appendStyleRun(curr.style, offset + curr.offset); // } // } else { // appendStyleRun(null, offset); // appended string will start with // // the default color // } // return this; // } // // /** // * Appends the string representation of the given character // * with a style to the {@link StyledString}. The // * appended character will have the given style associated. // * // * @param ch // * the character to append // * @param styler // * the styler to use for styling the character to append or // * null if no styler should be associated with the // * appended character // * @return returns a reference to this object // */ // public StyledString append(char ch, Styler styler) { // return append(String.valueOf(ch), styler); // } // // /** // * Appends a string with a style to the {@link StyledString}. The // * appended string will be styled using the given styler. // * // * @param string // * the string to append // * @param styler // * the styler to use for styling the string to append or // * null if no styler should be associated with the // * appended string. // * @return returns a reference to this object // */ // public StyledString append(String string, Styler styler) { // if (string.length() == 0) // return this; // // int offset = fBuffer.length(); // the length before appending // fBuffer.append(string); // appendStyleRun(styler, offset); // return this; // } // // /** // * Appends the string representation of the given character array // * with a style to the {@link StyledString}. The // * appended character array will be styled using the given styler. // * // * @param chars // * the character array to append // * @param styler // * the styler to use for styling the character array to append or // * null if no styler should be associated with the // * appended character array // * @return returns a reference to this object // */ // public StyledString append(char[] chars, Styler styler) { // if (chars.length == 0) // return this; // // int offset = fBuffer.length(); // the length before appending // fBuffer.append(chars); // appendStyleRun(styler, offset); // return this; // } // // /** // * Sets a styler to use for the given source range. The range must be // * subrange of actual string of this {@link StyledString}. Stylers // * previously set for that range will be overwritten. // * // * @param offset // * the start offset of the range // * @param length // * the length of the range // * @param styler // * the styler to set // * // * @throws StringIndexOutOfBoundsException // * if start is less than zero, or if offset plus // * length is greater than the length of this object. // */ // public void setStyle(int offset, int length, Styler styler) { // if (offset < 0 || offset + length > fBuffer.length()) { // throw new StringIndexOutOfBoundsException( // "Invalid offset (" + offset + ") or length (" + length + ")"); //$NON-NLS-1$//$NON-NLS-2$//$NON-NLS-3$ // } // if (length == 0) { // return; // } // if (!hasRuns() || getLastRun().offset <= offset) { // appendStyleRun(styler, offset); // if (offset + length != fBuffer.length()) { // appendStyleRun(null, offset + length); // } // return; // } // // int endRun = findRun(offset + length); // if (endRun >= 0) { // // run with the same end index, nothing to change // } else { // endRun = -(endRun + 1); // if (offset + length < fBuffer.length()) { // Styler prevStyle = endRun > 0 ? fStyleRuns.getRun(endRun - 1).style // : null; // fStyleRuns // .add(endRun, new StyleRun(offset + length, prevStyle)); // } // } // // int startRun = findRun(offset); // if (startRun >= 0) { // // run with the same start index // StyleRun styleRun = fStyleRuns.getRun(startRun); // styleRun.style = styler; // } else { // startRun = -(startRun + 1); // // Styler prevStyle = startRun > 0 ? fStyleRuns.getRun(startRun - 1).style // : null; // if (isDifferentStyle(prevStyle, styler) // || (startRun == 0 && styler != null)) { // fStyleRuns.add(startRun, new StyleRun(offset, styler)); // endRun++; // endrun is moved one back // } else { // startRun--; // we use the previous // } // } // if (startRun + 1 < endRun) { // fStyleRuns.removeRange(startRun + 1, endRun); // } // } // // /** // * Returns an array of {@link StyleRange} resulting from applying all // * associated stylers for this string builder. // * // * @return an array of all {@link StyleRange} resulting from applying the // * stored stylers to this string. // */ // public StyleRange[] getStyleRanges() { // if (hasRuns()) { // ArrayList res = new ArrayList(); // // List styleRuns = getStyleRuns(); // int offset = 0; // Styler style = null; // for (int i = 0; i < styleRuns.size(); i++) { // StyleRun curr = (StyleRun) styleRuns.get(i); // if (isDifferentStyle(curr.style, style)) { // if (curr.offset > offset && style != null) { // res.add(createStyleRange(offset, curr.offset, style)); // } // offset = curr.offset; // style = curr.style; // } // } // if (fBuffer.length() > offset && style != null) { // res.add(createStyleRange(offset, fBuffer.length(), style)); // } // return (StyleRange[]) res.toArray(new StyleRange[res.size()]); // } // return EMPTY; // } // // private int findRun(int offset) { // // method assumes that fStyleRuns is not null // int low = 0; // int high = fStyleRuns.size() - 1; // while (low <= high) { // int mid = (low + high) / 2; // StyleRun styleRun = fStyleRuns.getRun(mid); // if (styleRun.offset < offset) { // low = mid + 1; // } else if (styleRun.offset > offset) { // high = mid - 1; // } else { // return mid; // key found // } // } // return -(low + 1); // key not found. // } // // private StyleRange createStyleRange(int start, int end, Styler style) { // StyleRange styleRange = new StyleRange(); // styleRange.start = start; // styleRange.length = end - start; // style.applyStyles(styleRange); // return styleRange; // } // // private boolean hasRuns() { // return fStyleRuns != null && !fStyleRuns.isEmpty(); // } // // private void appendStyleRun(Styler style, int offset) { // StyleRun lastRun = getLastRun(); // if (lastRun != null && lastRun.offset == offset) { // lastRun.style = style; // return; // } // // if (lastRun == null && style != null || lastRun != null // && isDifferentStyle(style, lastRun.style)) { // getStyleRuns().add(new StyleRun(offset, style)); // } // } // // private boolean isDifferentStyle(Styler style1, Styler style2) { // if (style1 == null) { // return style2 != null; // } // return !style1.equals(style2); // } // // private StyleRun getLastRun() { // if (fStyleRuns == null || fStyleRuns.isEmpty()) { // return null; // } // return fStyleRuns.getRun(fStyleRuns.size() - 1); // } // // private List getStyleRuns() { // if (fStyleRuns == null) // fStyleRuns = new StyleRunList(); // return fStyleRuns; // } // // private static class StyleRun { // public int offset; // public Styler style; // // public StyleRun(int offset, Styler style) { // this.offset = offset; // this.style = style; // } // // public String toString() { // return "Offset " + offset + ", style: " + style; //$NON-NLS-1$//$NON-NLS-2$ // } // } // // private static class StyleRunList extends ArrayList { // private static final long serialVersionUID = 123L; // // public StyleRunList() { // super(3); // } // // public StyleRun getRun(int index) { // return (StyleRun) get(index); // } // // public void removeRange(int fromIndex, int toIndex) { // super.removeRange(fromIndex, toIndex); // } // } // // private static class DefaultStyler extends Styler { // private final String fForegroundColorName; // private final String fBackgroundColorName; // // public DefaultStyler(String foregroundColorName, // String backgroundColorName) { // fForegroundColorName = foregroundColorName; // fBackgroundColorName = backgroundColorName; // } // // public void applyStyles(TextStyle textStyle) { // ColorRegistry colorRegistry = JFaceResources.getColorRegistry(); // if (fForegroundColorName != null) { // textStyle.foreground = colorRegistry.get(fForegroundColorName); // } // if (fBackgroundColorName != null) { // textStyle.background = colorRegistry.get(fBackgroundColorName); // } // } // } // //}




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