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300 lines
7.8 KiB
Java
300 lines
7.8 KiB
Java
/*
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* Copyright (c) 1997, 2007, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation. Oracle designates this
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* particular file as subject to the "Classpath" exception as provided
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* by Oracle in the LICENSE file that accompanied this code.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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/*****************************************************************************/
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/* Copyright (c) IBM Corporation 1998 */
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/* */
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/* (C) Copyright IBM Corp. 1998 */
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/* */
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/*****************************************************************************/
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package sun.rmi.rmic;
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import java.io.Writer;
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import java.io.BufferedWriter;
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import java.io.IOException;
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/**
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* IndentingWriter is a BufferedWriter subclass that supports automatic
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* indentation of lines of text written to the underlying Writer.
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*
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* Methods are provided for compact, convenient indenting, writing text,
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* and writing lines in various combinations.
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*
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* WARNING: The contents of this source file are not part of any
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* supported API. Code that depends on them does so at its own risk:
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* they are subject to change or removal without notice.
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*/
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public class IndentingWriter extends BufferedWriter {
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/** true if the next character written is the first on a line */
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private boolean beginningOfLine = true;
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/** current number of spaces to prepend to lines */
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private int currentIndent = 0;
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/** number of spaces to change indent when indenting in or out */
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private int indentStep = 4;
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/** number of spaces to convert into tabs. Use MAX_VALUE to disable */
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private int tabSize = 8;
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/**
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* Create a new IndentingWriter that writes indented text to the
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* given Writer. Use the default indent step of four spaces.
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*/
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public IndentingWriter(Writer out) {
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super(out);
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}
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/**
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* Create a new IndentingWriter that writes indented text to the
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* given Writer and uses the supplied indent step.
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*/
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public IndentingWriter(Writer out, int step) {
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this(out);
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if (indentStep < 0)
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throw new IllegalArgumentException("negative indent step");
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indentStep = step;
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}
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/**
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* Create a new IndentingWriter that writes indented text to the
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* given Writer and uses the supplied indent step and tab size.
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*/
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public IndentingWriter(Writer out, int step, int tabSize) {
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this(out);
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if (indentStep < 0)
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throw new IllegalArgumentException("negative indent step");
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indentStep = step;
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this.tabSize = tabSize;
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}
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/**
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* Write a single character.
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*/
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public void write(int c) throws IOException {
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checkWrite();
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super.write(c);
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}
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/**
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* Write a portion of an array of characters.
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*/
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public void write(char[] cbuf, int off, int len) throws IOException {
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if (len > 0) {
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checkWrite();
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}
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super.write(cbuf, off, len);
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}
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/**
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* Write a portion of a String.
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*/
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public void write(String s, int off, int len) throws IOException {
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if (len > 0) {
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checkWrite();
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}
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super.write(s, off, len);
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}
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/**
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* Write a line separator. The next character written will be
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* preceded by an indent.
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*/
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public void newLine() throws IOException {
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super.newLine();
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beginningOfLine = true;
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}
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/**
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* Check if an indent needs to be written before writing the next
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* character.
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*
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* The indent generation is optimized (and made consistent with
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* certain coding conventions) by condensing groups of eight spaces
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* into tab characters.
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*/
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protected void checkWrite() throws IOException {
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if (beginningOfLine) {
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beginningOfLine = false;
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int i = currentIndent;
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while (i >= tabSize) {
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super.write('\t');
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i -= tabSize;
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}
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while (i > 0) {
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super.write(' ');
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-- i;
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}
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}
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}
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/**
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* Increase the current indent by the indent step.
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*/
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protected void indentIn() {
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currentIndent += indentStep;
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}
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/**
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* Decrease the current indent by the indent step.
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*/
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protected void indentOut() {
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currentIndent -= indentStep;
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if (currentIndent < 0)
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currentIndent = 0;
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}
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/**
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* Indent in.
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*/
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public void pI() {
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indentIn();
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}
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/**
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* Indent out.
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*/
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public void pO() {
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indentOut();
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}
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/**
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* Write string.
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*/
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public void p(String s) throws IOException {
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write(s);
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}
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/**
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* End current line.
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*/
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public void pln() throws IOException {
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newLine();
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}
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/**
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* Write string; end current line.
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*/
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public void pln(String s) throws IOException {
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p(s);
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pln();
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}
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/**
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* Write string; end current line; indent in.
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*/
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public void plnI(String s) throws IOException {
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p(s);
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pln();
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pI();
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}
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/**
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* Indent out; write string.
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*/
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public void pO(String s) throws IOException {
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pO();
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p(s);
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}
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/**
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* Indent out; write string; end current line.
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*/
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public void pOln(String s) throws IOException {
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pO(s);
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pln();
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}
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/**
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* Indent out; write string; end current line; indent in.
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*
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* This method is useful for generating lines of code that both
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* end and begin nested blocks, like "} else {".
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*/
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public void pOlnI(String s) throws IOException {
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pO(s);
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pln();
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pI();
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}
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/**
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* Write Object.
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*/
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public void p(Object o) throws IOException {
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write(o.toString());
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}
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/**
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* Write Object; end current line.
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*/
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public void pln(Object o) throws IOException {
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p(o.toString());
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pln();
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}
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/**
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* Write Object; end current line; indent in.
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*/
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public void plnI(Object o) throws IOException {
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p(o.toString());
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pln();
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pI();
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}
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/**
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* Indent out; write Object.
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*/
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public void pO(Object o) throws IOException {
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pO();
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p(o.toString());
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}
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/**
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* Indent out; write Object; end current line.
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*/
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public void pOln(Object o) throws IOException {
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pO(o.toString());
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pln();
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}
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/**
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* Indent out; write Object; end current line; indent in.
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*
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* This method is useful for generating lines of code that both
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* end and begin nested blocks, like "} else {".
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*/
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public void pOlnI(Object o) throws IOException {
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pO(o.toString());
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pln();
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pI();
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}
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}
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