1 /*
   2  * Copyright (c) 2010, 2019, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.  Oracle designates this
   8  * particular file as subject to the "Classpath" exception as provided
   9  * by Oracle in the LICENSE file that accompanied this code.
  10  *
  11  * This code is distributed in the hope that it will be useful, but WITHOUT
  12  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  13  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  14  * version 2 for more details (a copy is included in the LICENSE file that
  15  * accompanied this code).
  16  *
  17  * You should have received a copy of the GNU General Public License version
  18  * 2 along with this work; if not, write to the Free Software Foundation,
  19  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  20  *
  21  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  22  * or visit www.oracle.com if you need additional information or have any
  23  * questions.
  24  */
  25 
  26 package jdk.javadoc.internal.doclets.formats.html.markup;
  27 
  28 import java.io.IOException;
  29 import java.io.Writer;
  30 
  31 import jdk.javadoc.internal.doclets.toolkit.Content;
  32 import jdk.javadoc.internal.doclets.toolkit.util.DocletConstants;
  33 
  34 /**
  35  * Class for generating raw HTML content to be added to HTML pages of javadoc output.
  36  *
  37  *  <p><b>This is NOT part of any supported API.
  38  *  If you write code that depends on this, you do so at your own risk.
  39  *  This code and its internal interfaces are subject to change or
  40  *  deletion without notice.</b>
  41  *
  42  * @author Bhavesh Patel
  43  */
  44 public class RawHtml extends Content {
  45 
  46     private final String rawHtmlContent;
  47 


  48     public static final Content nbsp = new RawHtml("&nbsp;");
  49 
  50     public static final Content zws = new RawHtml("​");
  51 
  52     /**
  53      * Constructor to construct a RawHtml object.
  54      *
  55      * @param rawHtml raw HTML text to be added
  56      */
  57     public RawHtml(CharSequence rawHtml) {
  58         rawHtmlContent = rawHtml.toString();
  59     }
  60 
  61     /**
  62      * This method is not supported by the class.
  63      *
  64      * @param content content that needs to be added
  65      * @throws UnsupportedOperationException always
  66      */
  67     public void add(Content content) {
  68         throw new UnsupportedOperationException();
  69     }
  70 
  71     /**
  72      * This method is not supported by the class.
  73      *
  74      * @param stringContent string content that needs to be added
  75      * @throws UnsupportedOperationException always
  76      */
  77     @Override
  78     public void add(CharSequence stringContent) {
  79         throw new UnsupportedOperationException();
  80     }
  81 
  82     /**
  83      * {@inheritDoc}
  84      */
  85     public boolean isEmpty() {
  86         return rawHtmlContent.isEmpty();
  87     }
  88 
  89     /**
  90      * {@inheritDoc}
  91      */
  92     @Override
  93     public String toString() {
  94         return rawHtmlContent;
  95     }
  96 
  97     private enum State { TEXT, ENTITY, TAG, STRING }
  98 
  99     @Override
 100     public int charCount() {
 101         return charCount(rawHtmlContent);
 102     }
 103 
 104     static int charCount(CharSequence htmlText) {
 105         State state = State.TEXT;
 106         int count = 0;

 107         for (int i = 0; i < htmlText.length(); i++) {
 108             char c = htmlText.charAt(i);
 109             switch (state) {
 110                 case TEXT:
 111                     switch (c) {
 112                         case '<':
 113                             state = State.TAG;
 114                             break;
 115                         case '&':
 116                             state = State.ENTITY;
 117                             count++;
 118                             break;
 119                         default:
 120                             count++;
 121                     }
 122                     break;
 123 
 124                 case ENTITY:
 125                     if (!Character.isLetterOrDigit(c))
 126                         state = State.TEXT;



 127                     break;
 128 
 129                 case TAG:
 130                     switch (c) {
 131                         case '"':
 132                             state = State.STRING;
 133                             break;
 134                         case '>':
 135                             state = State.TEXT;
 136                             break;
 137                     }
 138                     break;
 139 
 140                 case STRING:
 141                     switch (c) {
 142                         case '"':
 143                             state = State.TAG;
 144                             break;
 145                     }

 146             }
 147         }
 148         return count;
 149     }
 150 
 151     /**
 152      * {@inheritDoc}
 153      */
 154     @Override
 155     public boolean write(Writer out, boolean atNewline) throws IOException {
 156         out.write(rawHtmlContent);
 157         return rawHtmlContent.endsWith(DocletConstants.NL);
 158     }










 159 }
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