001/* 002 * Portions of this software was developed by employees of the National Institute 003 * of Standards and Technology (NIST), an agency of the Federal Government and is 004 * being made available as a public service. Pursuant to title 17 United States 005 * Code Section 105, works of NIST employees are not subject to copyright 006 * protection in the United States. This software may be subject to foreign 007 * copyright. Permission in the United States and in foreign countries, to the 008 * extent that NIST may hold copyright, to use, copy, modify, create derivative 009 * works, and distribute this software and its documentation without fee is hereby 010 * granted on a non-exclusive basis, provided that this notice and disclaimer 011 * of warranty appears in all copies. 012 * 013 * THE SOFTWARE IS PROVIDED 'AS IS' WITHOUT ANY WARRANTY OF ANY KIND, EITHER 014 * EXPRESSED, IMPLIED, OR STATUTORY, INCLUDING, BUT NOT LIMITED TO, ANY WARRANTY 015 * THAT THE SOFTWARE WILL CONFORM TO SPECIFICATIONS, ANY IMPLIED WARRANTIES OF 016 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, AND FREEDOM FROM 017 * INFRINGEMENT, AND ANY WARRANTY THAT THE DOCUMENTATION WILL CONFORM TO THE 018 * SOFTWARE, OR ANY WARRANTY THAT THE SOFTWARE WILL BE ERROR FREE. IN NO EVENT 019 * SHALL NIST BE LIABLE FOR ANY DAMAGES, INCLUDING, BUT NOT LIMITED TO, DIRECT, 020 * INDIRECT, SPECIAL OR CONSEQUENTIAL DAMAGES, ARISING OUT OF, RESULTING FROM, 021 * OR IN ANY WAY CONNECTED WITH THIS SOFTWARE, WHETHER OR NOT BASED UPON WARRANTY, 022 * CONTRACT, TORT, OR OTHERWISE, WHETHER OR NOT INJURY WAS SUSTAINED BY PERSONS OR 023 * PROPERTY OR OTHERWISE, AND WHETHER OR NOT LOSS WAS SUSTAINED FROM, OR AROSE OUT 024 * OF THE RESULTS OF, OR USE OF, THE SOFTWARE OR SERVICES PROVIDED HEREUNDER. 025 */ 026 027package gov.nist.secauto.metaschema.core.datatype.markup.flexmark; 028 029import com.vladsch.flexmark.util.ast.Node; 030import com.vladsch.flexmark.util.ast.NodeVisitorBase; 031 032import edu.umd.cs.findbugs.annotations.NonNull; 033 034public class AstCollectingVisitor 035 extends NodeVisitorBase { 036 public static final String EOL = "\n"; 037 @NonNull 038 protected StringBuilder output = new StringBuilder(); // NOPMD - intentional 039 protected int indent; // 0; 040 protected boolean eolPending; // false; 041 042 @NonNull 043 public static String asString(@NonNull Node node) { 044 AstCollectingVisitor visitor = new AstCollectingVisitor(); 045 visitor.collect(node); 046 return visitor.getAst(); 047 } 048 049 @SuppressWarnings("null") 050 @NonNull 051 public String getAst() { 052 return output.toString(); 053 } 054 055 public void clear() { 056 output = new StringBuilder(); 057 indent = 0; 058 eolPending = false; 059 } 060 061 protected void appendIndent() { 062 for (int i = 0; i < indent * 2; i++) { 063 output.append(' '); 064 } 065 eolPending = true; 066 } 067 068 protected void appendEOL() { 069 output.append(EOL); 070 eolPending = false; 071 } 072 073 protected void appendPendingEOL() { 074 if (eolPending) { 075 appendEOL(); 076 } 077 } 078 079 public void collect(@NonNull Node node) { 080 visit(node); 081 } 082 083 @Override 084 protected void visit(Node node) { 085 assert node != null; 086 appendIndent(); 087 node.astString(output, true); 088 output.append(EOL); 089 indent++; 090 091 try { 092 super.visitChildren(node); 093 } finally { 094 indent--; 095 } 096 } 097}