content: /*
   *  Licensed to the Apache Software Foundation (ASF) under one
   *  or more contributor license agreements.  See the NOTICE file
   *  distributed with this work for additional information
   *  regarding copyright ownership.  The ASF licenses this file
   *  to you 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 org.apache.causeway.testing.unittestsupport.applib.io;
  
  import java.io.IOException;
  import java.io.PrintWriter;
  import java.io.Writer;
  
  /**
   * Adapted from <tt>groovy.util.IndentPrinter</tt> (published under ASL 2.0).
   *
   * @since 2.0 {@index}
   */
  public class IndentPrinter {
  
      private int indentLevel;
      private String indent;
      private Writer out;
      private final boolean addNewlines;
  
      /**
       * Creates an IndentPrinter backed by a PrintWriter pointing to System.out, with an indent of two spaces.
       *
       * @see #IndentPrinter(Writer, String)
       */
      public IndentPrinter() {
          this(new PrintWriter(System.out), "  ");
      }
  
      /**
       * Creates an IndentPrinter backed by the supplied Writer, with an indent of two spaces.
       *
       * @param out Writer to output to
       * @see #IndentPrinter(Writer, String)
       */
      public IndentPrinter(Writer out) {
          this(out, "  ");
      }
  
      /**
       * Creates an IndentPrinter backed by the supplied Writer,
       * with a user-supplied String to be used for indenting.
       *
       * @param out Writer to output to
       * @param indent character(s) used to indent each line
       */
      public IndentPrinter(Writer out, String indent) {
          this(out, indent, true);
      }
  
      /**
       * Creates an IndentPrinter backed by the supplied Writer,
       * with a user-supplied String to be used for indenting
       * and the ability to override newline handling.
       *
       * @param out Writer to output to
       * @param indent character(s) used to indent each line
       * @param addNewlines set to false to gobble all new lines (default true)
       */
      public IndentPrinter(Writer out, String indent, boolean addNewlines) {
          this.addNewlines = addNewlines;
          if (out == null) {
              throw new IllegalArgumentException("Must specify a Writer");
          }
          this.out = out;
          this.indent = indent;
      }
  
      /**
       * Prints a string followed by an end of line character.
       *
       * @param  text String to be written
       */
      public void println(String text) {
          printIndent();
          try {
              out.write(text);
              println();
              flush();
          } catch(IOException ioe) {
              throw new RuntimeException(ioe);
          }
      }
  
      /**
       * Prints a string.
       *
       * @param  text String to be written
       */
      public void print(String text) {
          try {
              out.write(text);
          } catch(IOException ioe) {
              throw new RuntimeException(ioe);
          }
      }
  
      /**
       * Prints a character.
       *
       * @param  c char to be written
       */
      public void print(char c) {
          try {
              out.write(c);
          } catch(IOException ioe) {
              throw new RuntimeException(ioe);
          }
      }
  
      /**
       * Prints the current indent level.
       */
      public void printIndent() {
          for (int i = 0; i < indentLevel; i++) {
              try {
                  out.write(indent);
              } catch(IOException ioe) {
                  throw new RuntimeException(ioe);
              }
          }
      }
  
      /**
       * Prints an end-of-line character (if enabled via addNewLines property).
       * Defaults to outputting a single '\n' character but by using a custom
       * Writer, e.g. PlatformLineWriter, you can get platform-specific
       * end-of-line characters.
       *
       * @see #IndentPrinter(Writer, String, boolean)
       */
      public void println() {
          if (addNewlines) {
              try {
                  out.write("\n");
              } catch(IOException ioe) {
                  throw new RuntimeException(ioe);
              }
          }
      }
  
      public void incrementIndent() {
          ++indentLevel;
      }
  
      public void decrementIndent() {
          --indentLevel;
      }
  
      public int getIndentLevel() {
          return indentLevel;
      }
  
      public void setIndentLevel(int indentLevel) {
          this.indentLevel = indentLevel;
      }
  
      public void flush() {
          try {
              out.flush();
          } catch(IOException ioe) {
              throw new RuntimeException(ioe);
          }
      }
  }
  