platform/platform-impl/src/com/intellij/ui/SplittingUtil.java

   1 /*
   2  * Copyright 2000-2009 JetBrains s.r.o.
   3  *
   4  * Licensed under the Apache License, Version 2.0 (the "License");
   5  * you may not use this file except in compliance with the License.
   6  * You may obtain a copy of the License at
   7  *
   8  * http://www.apache.org/licenses/LICENSE-2.0
   9  *
  10  * Unless required by applicable law or agreed to in writing, software
  11  * distributed under the License is distributed on an "AS IS" BASIS,
  12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  13  * See the License for the specific language governing permissions and
  14  * limitations under the License.
  15  */
  16 package com.intellij.ui;
  17
  18 import com.intellij.util.ArrayUtil;
  19
  20 import java.awt.*;
  21 import java.util.ArrayList;
  22
  23 public class SplittingUtil {
  24   public static String[] splitText(String text, FontMetrics fontMetrics, int widthLimit, char separator){
  25     ArrayList<String> lines = new ArrayList<String>();
  26     String currentLine = "";
  27     StringBuffer currentAtom = new StringBuffer();
  28
  29     for (int i=0; i < text.length(); i++) {
  30       char ch = text.charAt(i);
  31       currentAtom.append(ch);
  32
  33       if (ch == separator) {
  34         currentLine += currentAtom.toString();
  35         currentAtom.setLength(0);
  36       }
  37
  38       String s = currentLine + currentAtom.toString();
  39       int width = fontMetrics.stringWidth(s);
  40
  41       if (width >= widthLimit - fontMetrics.charWidth('w')) {
  42         if (currentLine.length() > 0) {
  43           lines.add(currentLine);
  44           currentLine = "";
  45         }
  46         else {
  47           lines.add(currentAtom.toString());
  48           currentAtom.setLength(0);
  49         }
  50       }
  51     }
  52
  53     String s = currentLine + currentAtom.toString();
  54     if (s.length() > 0) {
  55       lines.add(s);
  56     }
  57
  58     return ArrayUtil.toStringArray(lines);
  59   }
  60 }