| /* |
| * Copyright (C) 2012 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| package com.android.internal.util; |
| |
| import java.io.PrintWriter; |
| import java.io.Writer; |
| |
| /** |
| * Lightweight wrapper around {@link PrintWriter} that automatically indents |
| * newlines based on internal state. Delays writing indent until first actual |
| * write on a newline, enabling indent modification after newline. |
| */ |
| public class IndentingPrintWriter extends PrintWriter { |
| private final String mIndent; |
| |
| private StringBuilder mBuilder = new StringBuilder(); |
| private String mCurrent = new String(); |
| private boolean mEmptyLine = true; |
| |
| public IndentingPrintWriter(Writer writer, String indent) { |
| super(writer); |
| mIndent = indent; |
| } |
| |
| public void increaseIndent() { |
| mBuilder.append(mIndent); |
| mCurrent = mBuilder.toString(); |
| } |
| |
| public void decreaseIndent() { |
| mBuilder.delete(0, mIndent.length()); |
| mCurrent = mBuilder.toString(); |
| } |
| |
| public void printPair(String key, Object value) { |
| print(key + "=" + String.valueOf(value) + " "); |
| } |
| |
| @Override |
| public void println() { |
| super.println(); |
| mEmptyLine = true; |
| } |
| |
| @Override |
| public void write(char[] buf, int offset, int count) { |
| if (mEmptyLine) { |
| mEmptyLine = false; |
| super.print(mCurrent); |
| } |
| super.write(buf, offset, count); |
| } |
| } |