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

   1 /*
   2  * $Id: ElementWriter.java,v 1.2 2005-05-06 00:57:33 stefanbjarni Exp $
   3  * Copyright Narushima Hironori. All rights reserved.
   4  */
   5 package net.sourceforge.phpeclipse.wizards.html;
   6
   7 import java.io.IOException;
   8 import java.io.OutputStream;
   9 import java.io.OutputStreamWriter;
  10 import java.util.HashMap;
  11
  12 import org.w3c.dom.Element;
  13 import org.w3c.dom.NamedNodeMap;
  14 import org.w3c.dom.Node;
  15 import org.w3c.dom.NodeList;
  16 import org.w3c.dom.Text;
  17
  18 /**
  19  * ElementWriter provides destribute xml code.
  20  */
  21 public class ElementWriter {
  22
  23         final public static int
  24                 BEGIN_CHANGELINE = 1,
  25                 END_CHANGELINE = 2;
  26
  27         boolean trim = true;
  28         HashMap expandOptions = new HashMap();
  29         int defaultExpandOption;
  30         String indent;
  31
  32         public ElementWriter() {
  33                 this(0, "  ");
  34         }
  35
  36         public ElementWriter(int defaultExpandOption, String indent) {
  37                 this.defaultExpandOption = defaultExpandOption;
  38                 this.indent = indent;
  39         }
  40
  41         public void setExpandOption(String elementName, int value){
  42                 expandOptions.put(elementName, new Integer(value));
  43         }
  44
  45         public int getExpandOption(String elementName){
  46                 if( expandOptions.containsKey(elementName)){
  47                         return ((Integer)expandOptions.get(elementName)).intValue();
  48                 }
  49                 return defaultExpandOption;
  50         }
  51
  52         boolean isBeginChangeLine(String elementName){
  53                 return (getExpandOption(elementName) & BEGIN_CHANGELINE) != 0;
  54         }
  55
  56         boolean isEndChangeLine(String elementName){
  57                 return (getExpandOption(elementName) & END_CHANGELINE) != 0;
  58         }
  59
  60         public String expandTag(Element element){
  61                 StringBuffer buff = new StringBuffer();
  62                 expandTag(element, 0, buff);
  63                 return buff.toString();
  64         }
  65
  66         public void writeTag(Element element, OutputStream out) throws IOException {
  67                 OutputStreamWriter writer = new OutputStreamWriter(out);
  68                 try{
  69                         writer.write("<?xml version=\"1.0\"?>\n\n");
  70                         writer.write(new ElementWriter().expandTag(element));
  71                 }finally{
  72                         if(writer != null){
  73                                 writer.close();
  74                         }
  75                 }
  76         }
  77
  78         void expandTag(Element element, int level, StringBuffer buff){
  79                 expandIndent(level, buff);
  80
  81                 String elementName = element.getNodeName();
  82                 buff.append('<' + elementName );
  83                 NamedNodeMap attrs = element.getAttributes();
  84                 for(int i=0; i<attrs.getLength(); i++){
  85                         Node n = attrs.item(i);
  86                         String v = n.getNodeValue();
  87                         if(v != null){
  88                                 buff.append(' ' + n.getNodeName() + "=\"" + HTMLUtilities.escape(v) + "\"");
  89                         }
  90                 }
  91
  92                 boolean emptyElem = element.getChildNodes().getLength() == 0;
  93                 if(emptyElem){
  94                         buff.append(" /");
  95                 }
  96                 buff.append('>');
  97                 if(!emptyElem ){
  98                         NodeList childElements = element.getChildNodes();
  99                         if(isBeginChangeLine(elementName)){
 100                                 buff.append('\n');
 101                         }
 102                         for(int i=0; i<childElements.getLength(); i++){
 103                                 Node node = childElements.item(i);
 104                                 if( node instanceof Element){
 105                                         expandTag( (Element)node, level+1, buff);
 106                                 }else if (node instanceof Text){
 107                                         String text = ((Text)node).getNodeValue();
 108                                         if(trim && (text = text.trim()).length() == 0){
 109                                                 continue;
 110                                         }
 111                                         buff.append(text);
 112                                 }
 113                         }
 114                         expandIndent(level, buff);
 115                         buff.append("</" + elementName + '>');
 116                 }
 117                 // already inserted change line.
 118                 if( isEndChangeLine(elementName) ){
 119                         buff.append('\n');
 120                 }
 121         }
 122
 123         void expandIndent(int level, StringBuffer buff){
 124                 if(indent != null){
 125                         for(int i=0; i<level; i++){
 126                                 buff.append(indent);
 127                         }
 128                 }
 129         }
 130
 131         public int getDefaultExpandOption() {
 132                 return defaultExpandOption;
 133         }
 134
 135         public void setDefaultExpandOption(int i) {
 136                 defaultExpandOption = i;
 137         }
 138
 139 }