content: /*
   * Copyright (c) 2007, 2014, Oracle and/or its affiliates. All rights reserved.
   * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   *
   * This code is free software; you can redistribute it and/or modify it
   * under the terms of the GNU General Public License version 2 only, as
   * published by the Free Software Foundation.  Oracle designates this
   * particular file as subject to the "Classpath" exception as provided
   * by Oracle in the LICENSE file that accompanied this code.
   *
   * This code is distributed in the hope that it will be useful, but WITHOUT
   * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
   * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
   * version 2 for more details (a copy is included in the LICENSE file that
   * accompanied this code).
   *
   * You should have received a copy of the GNU General Public License version
   * 2 along with this work; if not, write to the Free Software Foundation,
   * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
   *
   * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
   * or visit www.oracle.com if you need additional information or have any
   * questions.
   */
  
  package openjdk.tools.javap;
  
  import java.io.PrintWriter;
  
  import openjdk.tools.classfile.AttributeException;
  import openjdk.tools.classfile.ConstantPoolException;
  import openjdk.tools.classfile.DescriptorException;
  
  /*
   *  A writer similar to a PrintWriter but which does not hide exceptions.
   *  The standard print calls are line-buffered; report calls write messages directly.
   *
   *  <p><b>This is NOT part of any supported API.
   *  If you write code that depends on this, you do so at your own risk.
   *  This code and its internal interfaces are subject to change or
   *  deletion without notice.</b>
   */
  public class BasicWriter {
      protected BasicWriter(Context context) {
          lineWriter = LineWriter.instance(context);
          out = context.get(PrintWriter.class);
          messages = context.get(Messages.class);
          if (messages == null)
              throw new AssertionError();
      }
  
      protected void print(String s) {
          lineWriter.print(s);
      }
  
      protected void print(Object o) {
          lineWriter.print(o == null ? null : o.toString());
      }
  
      protected void println() {
          lineWriter.println();
      }
  
      protected void println(String s) {
          lineWriter.print(s);
          lineWriter.println();
      }
  
      protected void println(Object o) {
          lineWriter.print(o == null ? null : o.toString());
          lineWriter.println();
      }
  
      protected void indent(int delta) {
          lineWriter.indent(delta);
      }
  
      protected void tab() {
          lineWriter.tab();
      }
  
      protected void setPendingNewline(boolean b) {
          lineWriter.pendingNewline = b;
      }
  
      protected String report(AttributeException e) {
          out.println("Error: " + e.getMessage()); // i18n?
          return "???";
      }
  
      protected String report(ConstantPoolException e) {
          out.println("Error: " + e.getMessage()); // i18n?
          return "???";
      }
  
      protected String report(DescriptorException e) {
          out.println("Error: " + e.getMessage()); // i18n?
          return "???";
      }
  
      protected String report(String msg) {
          out.println("Error: " + msg); // i18n?
          return "???";
      }
  
      protected String space(int w) {
          if (w < spaces.length && spaces[w] != null)
              return spaces[w];
  
          StringBuilder sb = new StringBuilder();
          for (int i = 0; i < w; i++)
              sb.append(" ");
  
          String s = sb.toString();
          if (w < spaces.length)
              spaces[w] = s;
  
          return s;
      }
  
      private String[] spaces = new String[80];
  
      private LineWriter lineWriter;
      private PrintWriter out;
      protected Messages messages;
  
      private static class LineWriter {
          static LineWriter instance(Context context) {
              LineWriter instance = context.get(LineWriter.class);
              if (instance == null)
                  instance = new LineWriter(context);
              return instance;
          }
  
          protected LineWriter(Context context) {
              context.put(LineWriter.class, this);
              Options options = Options.instance(context);
              indentWidth = options.indentWidth;
              tabColumn = options.tabColumn;
              out = context.get(PrintWriter.class);
              buffer = new StringBuilder();
          }
  
          protected void print(String s) {
              if (pendingNewline) {
                  println();
                  pendingNewline = false;
              }
              if (s == null)
                  s = "null";
              for (int i = 0; i < s.length(); i++) {
                  char c = s.charAt(i);
                  switch (c) {
                      case ' ':
                          pendingSpaces++;
                          break;
  
                      case '\n':
                          println();
                          break;
  
                      default:
                          if (buffer.length() == 0)
                              indent();
                          if (pendingSpaces > 0) {
                              for (int sp = 0; sp < pendingSpaces; sp++)
                                  buffer.append(' ');
                              pendingSpaces = 0;
                          }
                          buffer.append(c);
                  }
              }
  
          }
  
          protected void println() {
              // ignore/discard pending spaces
              pendingSpaces = 0;
              out.println(buffer);
              buffer.setLength(0);
          }
  
          protected void indent(int delta) {
              indentCount += delta;
          }
  
          protected void tab() {
              int col = indentCount * indentWidth + tabColumn;
              pendingSpaces += (col <= buffer.length() ? 1 : col - buffer.length());
          }
  
          private void indent() {
              pendingSpaces += (indentCount * indentWidth);
          }
  
          private final PrintWriter out;
          private final StringBuilder buffer;
          private int indentCount;
          private final int indentWidth;
          private final int tabColumn;
          private boolean pendingNewline;
          private int pendingSpaces;
      }
  }
  
  