net.sourceforge.phpeclipse/src/net/sourceforge/phpeclipse/wizards/html/ElementWriter.java

   1 /*
   2  * $Id: ElementWriter.java,v 1.1 2004-10-05 20:51:57 jsurfer Exp $
   3  * Copyright Narushima Hironori. All rights reserved.
   4  */
   5 package net.sourceforge.phpeclipse.wizards.html;
   6
   7 import java.io.*;
   8 import java.util.HashMap;
   9
  10 import org.w3c.dom.*;
  11
  12 /**
  13  * ElementWriter provides destribute xml code.
  14  */
  15 public class ElementWriter {
  16
  17         final public static int
  18                 BEGIN_CHANGELINE = 1,
  19                 END_CHANGELINE = 2;
  20
  21         boolean trim = true;
  22         HashMap expandOptions = new HashMap();
  23         int defaultExpandOption;
  24         String indent;
  25
  26         public ElementWriter() {
  27                 this(0, "  ");
  28         }
  29
  30         public ElementWriter(int defaultExpandOption, String indent) {
  31                 this.defaultExpandOption = defaultExpandOption;
  32                 this.indent = indent;
  33         }
  34
  35         public void setExpandOption(String elementName, int value){
  36                 expandOptions.put(elementName, new Integer(value));
  37         }
  38
  39         public int getExpandOption(String elementName){
  40                 if( expandOptions.containsKey(elementName)){
  41                         return ((Integer)expandOptions.get(elementName)).intValue();
  42                 }
  43                 return defaultExpandOption;
  44         }
  45
  46         boolean isBeginChangeLine(String elementName){
  47                 return (getExpandOption(elementName) & BEGIN_CHANGELINE) != 0;
  48         }
  49
  50         boolean isEndChangeLine(String elementName){
  51                 return (getExpandOption(elementName) & END_CHANGELINE) != 0;
  52         }
  53
  54         public String expandTag(Element element){
  55                 StringBuffer buff = new StringBuffer();
  56                 expandTag(element, 0, buff);
  57                 return buff.toString();
  58         }
  59
  60         public void writeTag(Element element, OutputStream out) throws IOException {
  61                 OutputStreamWriter writer = new OutputStreamWriter(out);
  62                 try{
  63                         writer.write("<?xml version=\"1.0\"?>\n\n");
  64                         writer.write(new ElementWriter().expandTag(element));
  65                 }finally{
  66                         if(writer != null){
  67                                 writer.close();
  68                         }
  69                 }
  70         }
  71
  72         void expandTag(Element element, int level, StringBuffer buff){
  73                 expandIndent(level, buff);
  74
  75                 String elementName = element.getNodeName();
  76                 buff.append('<' + elementName );
  77                 NamedNodeMap attrs = element.getAttributes();
  78                 for(int i=0; i<attrs.getLength(); i++){
  79                         Node n = attrs.item(i);
  80                         String v = n.getNodeValue();
  81                         if(v != null){
  82                                 buff.append(' ' + n.getNodeName() + "=\"" + HTMLUtilities.escape(v) + "\"");
  83                         }
  84                 }
  85
  86                 boolean emptyElem = element.getChildNodes().getLength() == 0;
  87                 if(emptyElem){
  88                         buff.append(" /");
  89                 }
  90                 buff.append('>');
  91                 if(!emptyElem ){
  92                         NodeList childElements = element.getChildNodes();
  93                         if(isBeginChangeLine(elementName)){
  94                                 buff.append('\n');
  95                         }
  96                         for(int i=0; i<childElements.getLength(); i++){
  97                                 Node node = childElements.item(i);
  98                                 if( node instanceof Element){
  99                                         expandTag( (Element)node, level+1, buff);
 100                                 }else if (node instanceof Text){
 101                                         String text = ((Text)node).getNodeValue();
 102                                         if(trim && (text = text.trim()).length() == 0){
 103                                                 continue;
 104                                         }
 105                                         buff.append(text);
 106                                 }
 107                         }
 108                         expandIndent(level, buff);
 109                         buff.append("</" + elementName + '>');
 110                 }
 111                 // already inserted change line.
 112                 if( isEndChangeLine(elementName) ){
 113                         buff.append('\n');
 114                 }
 115         }
 116
 117         void expandIndent(int level, StringBuffer buff){
 118                 if(indent != null){
 119                         for(int i=0; i<level; i++){
 120                                 buff.append(indent);
 121                         }
 122                 }
 123         }
 124
 125         public int getDefaultExpandOption() {
 126                 return defaultExpandOption;
 127         }
 128
 129         public void setDefaultExpandOption(int i) {
 130                 defaultExpandOption = i;
 131         }
 132
 133 }