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/*
 * Copyright 2011 Google Inc.
 * 
 * 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.google.gwt.codegen.server;

/**
 * Base implementation of {@link SourceWriter} that implements all the indenting
 * and keeping track of comments.
 * 

* Experimental API - subject to change. */ public abstract class SourceWriterBase implements SourceWriter { private boolean atStart; /** * Are we currently in a comment? */ private boolean inComment; private int indent; public abstract void abort(); public void beginJavaDocComment() { println("\n/**"); inComment = true; } public void close() { outdent(); println("}"); } public void endJavaDocComment() { inComment = false; println("\n */"); } public void indent() { indent++; } public void indentln(String string) { indent(); println(string); outdent(); } public void indentln(String format, Object... args) { indentln(String.format(format, args)); } public void outdent() { if (indent > 0) { --indent; } } public void print(String s) { // If we just printed a newline, print an indent. // if (atStart) { for (int j = 0; j < indent; ++j) { writeString(" "); } if (inComment) { writeString(" * "); } atStart = false; } // Now print up to the end of the string or the next newline. // String rest = null; int i = s.indexOf("\n"); if (i > -1 && i < s.length() - 1) { rest = s.substring(i + 1); s = s.substring(0, i + 1); } writeString(s); // If rest is non-null, then s ended with a newline and we recurse. // if (rest != null) { atStart = true; print(rest); } } public void print(String format, Object... args) { print(String.format(format, args)); } public void println() { print("\n"); atStart = true; } public void println(String string) { print(string); println(); } public void println(String format, Object... args) { println(String.format(format, args)); } /** * Write a string to the underlying output. * * @param s */ protected abstract void writeString(String s); }





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