StringUtils.java

package edu.stanford.hci.r3.util;

import java.awt.Dimension;
import java.awt.Font;
import java.awt.font.FontRenderContext;
import java.awt.geom.Rectangle2D;
import java.util.ArrayList;
import java.util.List;

public class StringUtils {

        public static Dimension getStringSize(String textToMeasure, Font displayFont) {
                final FontRenderContext fontRenderContext = new FontRenderContext(null, true, true);

                // break it up by lines (in case there are newlines "\n")
                final String[] strings = textToMeasure.split("\n");

                double totalHeight = 0;
                double maxWidth = 0;

                for (String s : strings) {
                        Rectangle2D stringBounds = displayFont.getStringBounds(s, fontRenderContext);
                        maxWidth = Math.max(maxWidth, stringBounds.getWidth());
                        totalHeight += stringBounds.getHeight();
                }

                final Dimension dimension = new Dimension();
                dimension.setSize(maxWidth, totalHeight);
                return dimension;
        }

        public static String repeat(String string, int numTimes) {
                StringBuilder sb = new StringBuilder();
                for (int i = 0; i < numTimes; i++) {
                        sb.append(string);
                }
                return sb.toString();
        }

        public static List<String> splitString(String string, int maxCharsPerLine) {
                final List<String> lines = new ArrayList<String>();
                final String[] items = string.split(" ");
                final StringBuilder currString = new StringBuilder();
                for (String item : items) {
                        if (currString.length() + item.length() > maxCharsPerLine) {
                                lines.add(currString.toString());
                                currString.setLength(0); // clear buffer
                        }
                        currString.append(item + " ");
                }
                lines.add(currString.toString());
                return lines;
        }

}

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