Home | History | Annotate | Download | only in tools 
      1 /*
      2  * Copyright (C) 2012 The Android Open Source Project
      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 
     17 package com.android.inputmethod.keyboard.tools;
     18 
     19 import java.io.PrintStream;
     20 
     21 public class ArrayInitializerFormatter {
     22     private final PrintStream mOut;
     23     private final int mMaxWidth;
     24     private final String mIndent;
     25 
     26     private int mCurrentIndex = 0;
     27     private String mFixedElement;
     28     private final StringBuilder mBuffer = new StringBuilder();
     29     private int mBufferedLen;
     30     private int mBufferedIndex = Integer.MIN_VALUE;
     31 
     32     public ArrayInitializerFormatter(PrintStream out, int width, String indent) {
     33         mOut = out;
     34         mMaxWidth = width - indent.length();
     35         mIndent = indent;
     36     }
     37 
     38     public void flush() {
     39         if (mBuffer.length() == 0) {
     40             return;
     41         }
     42         final int lastIndex = mCurrentIndex - 1;
     43         if (mBufferedIndex == lastIndex) {
     44             mOut.format("%s/* %d */ %s\n", mIndent, mBufferedIndex, mBuffer);
     45         } else if (mBufferedIndex == lastIndex - 1) {
     46             final String[] elements = mBuffer.toString().split(" ");
     47             mOut.format("%s/* %d */ %s\n"
     48                     + "%s/* %d */ %s\n",
     49                     mIndent, mBufferedIndex, elements[0],
     50                     mIndent, lastIndex, elements[1]);
     51         } else {
     52             mOut.format("%s/* %d~ */\n"
     53                     + "%s%s\n"
     54                     + "%s/* ~%d */\n", mIndent, mBufferedIndex,
     55                     mIndent, mBuffer,
     56                     mIndent, lastIndex);
     57         }
     58         mBuffer.setLength(0);
     59         mBufferedLen = 0;
     60     }
     61 
     62     public void outCommentLines(String lines) {
     63         flush();
     64         mOut.print(lines);
     65         mFixedElement = null;
     66     }
     67 
     68     public void outElement(String element) {
     69         if (!element.equals(mFixedElement)) {
     70             flush();
     71             mBufferedIndex = mCurrentIndex;
     72         }
     73         final int nextLen = mBufferedLen + " ".length() + element.length();
     74         if (mBufferedLen != 0 && nextLen < mMaxWidth) {
     75             mBuffer.append(' ');
     76             mBuffer.append(element);
     77             mBufferedLen = nextLen;
     78         } else {
     79             if (mBufferedLen != 0) {
     80                 mBuffer.append('\n');
     81                 mBuffer.append(mIndent);
     82             }
     83             mBuffer.append(element);
     84             mBufferedLen = element.length();
     85         }
     86         mCurrentIndex++;
     87         mFixedElement = element;
     88     }
     89 }
     90