wmldeckbuilder.java

An open_source WAP browser. include Java code. support WML documents and WBMP images.

    while(i<source.length()){
      switch(source.charAt(i)){
        case '<':
          source = (i>0?source.substring(0,i):"")
            +"&lt;"
            +(i<source.length()-1?source.substring(i+1):"");
          i+=3;
          break;
        case '&':
          source = (i>0?source.substring(0,i):"")
            +"&amp;"
            +(i<source.length()-1?source.substring(i+1):"");
          i+=4;
          break;
        case '>': 
          source = (i>0?source.substring(0,i):"")
            +"&gt;"
            +(i<source.length()-1?source.substring(i+1):"");
          i+=3;
         break;
        case '\n':
          if(encodeCR){
            source = (i>0?source.substring(0,i):"")
              +"<br>"
              +(i<source.length()-1?source.substring(i+1):"");
            i+=4;
          }else{
            i++;
          }
          break;
        default:
          i++;
      }
    }
    return(source);
  }  
  
  /**
   * This inner class contains knowledge about the WML elements
   * which are supported by this user agent.  This is where the WML
   * content is actually interpreted and constructed into the WmlCard
   * (and related) objects.
   * <p> The following tags are recognised to some extent:
   * <ul>
   * <li>&lt;a&gt;
   * <li>&lt;br&gt;
   * <li>&lt;card&gt;
   * <li>&lt;do&gt;
   * <li>&lt;go&gt;
   * <li>&lt;i&gt;
   * <li>&lt;input&gt;
   * <li>&lt;p&gt;
   * <li>&lt;b&gt;
   * <li>&lt;u&gt;
   * <li>&lt;big&gt;
   * <li>&lt;em&gt;
   * <li>&lt;select&gt;
   * <li>&lt;option&gt;
   * <li>&lt;postfield&gt;
   * <li>&lt;onevent&gt;
   * <li>&lt;img&gt;
   * <li>&lt;prev&gt;
   * <li>&lt;refresh&gt;
   * <li>&lt;setvar&gt;
   * <li>&lt;template&gt;
   * <li>&lt;table&gt;
   * <li>&lt;tr&gt;
   * <li>&lt;td&gt;
   * <li>&lt;timer&gt;
   * </ul>
   *
   */
  public class wmlelement{
    String name;
    StringBuffer endTags;
    boolean begun;
    private Hashtable attributes;
    private WmlDeckBuilder builder;
    private WmlDeck deck;
    /**
     * Construct a wmlelement of the given name.
     * If the name is not recognised, then it will be ignored
     * (however, recognised elements contained by it will be
     * utilised).
     *
     * @param elname The name of this element
     */
    public wmlelement(String elname, WmlDeckBuilder b){
      builder = b;
	    deck = builder.getDeck();
	    name = elname.toLowerCase();
	    attributes = new Hashtable();
	    endTags = new StringBuffer();
	    begun = false;
    }

  /**
   * Begin interpreting the attributes of this element.
   */
    public void begin(Hashtable a){
	    attributes = a;
	    // only want to begin once...
	    if(begun){
        return;
	    }
	    begun = true;

	    //System.err.println("//beginning element ["+name + "]");
	    //System.err.println("//attributes are ["+attributes.toString()+"]");
	    //System.err.println("beginning "+name);
      
      /**
       * If the name is "wml", then we are within a (hopefully) valid
       * WML deck.
       */
	    if(name.equals("wml")){
        builder.setDeck(new WmlDeck(sourceUrl));
        return;
	    }else if(deck == null){
        /**
         * Any tags outside the "wml" tags will be ignored.
         */
		    System.err.println("ignoring tag .. not inside wml["+name+"]");
		    return;
	    }


	    if(name.equals("a")){
        String href = 
          (String)attributes.get("href"); 
        href = deck.resolveUrl(href);
        deck.currentcard.cardData("<a href='javascript:setCard(\""+href+"\");'>");
        endTags.append("</a>");
	    }else if(name.equals("anchor")){	
        String accesskey = 
          (String)attributes.get("accesskey");
        String title = 
          (String)attributes.get("title");        
        deck.currentcard.cardData("<a href='javascript:reval(getHref("+deck.countTasks()+"));'>");
        endTags.append("</a>");      
	    }else if(name.equals("br")){
        deck.currentcard.cardData("<br>");
	    }else if(name.equals("card")){
        String id = 
          (String)attributes.get("id");
        String onenterforward = 
          (String)attributes.get("onenterforward");
        String onenterbackward =
          (String)attributes.get("onenterbackward");
        String align =
          (String)attributes.get("align");
        String title =
          (String)attributes.get("title");	    
        String ontimer =
          (String)attributes.get("ontimer");
        if(id == null || id.equals("")){
          id = "aplpi"+ ++deck.unknownCards;
        }
        WmlCard card = new WmlCard(deck,id);
        if(onenterforward != null){
          card.onenterforward("setCard('"+deck.resolveUrl(onenterforward)+"');");    	
        }
        if(onenterbackward != null){
          card.onenterbackward("setCard('"+deck.resolveUrl(onenterbackward)+"');");    	
        }
        deck.addCard(card);
        if(ontimer != null){
          ontimer = deck.resolveUrl(ontimer);
          card.ontimer(new String("setCard('"+ontimer+"');"));
        }
        if(title != null){
          deck.currentcard.cardData("<!--title--><center>"
                                    +title+"</center>");
        }
        if(align != null){
          deck.currentcard.cardData("<"+align+">");
          endTags.append("</"+align+">");
        }
        endTags.append("\n");
	    }else if(name.equals("do")){
        String type =
          (String)attributes.get("type");
        String label =
          (String)attributes.get("label");
        String name_ =
          (String)attributes.get("name");
        String optional =
          (String)attributes.get("optional");
        if(type == null){
        }else if(type.equals("accept")){
          //Positive acknowledgement (acceptance)
          if(label == null){
            label="ok";
          }
          deck.currentcard.navData(
            "<a href='javascript:reval(getHref("+deck.countTasks()+"));'>"
            + "<em>"
            + label+"</em></a>");
        }else if(type.equals("prev")){
          //Backward history navigation
          if(label == null){
            label = "back";
          }
          deck.currentcard.navData(
            "<a href='javascript:prevCard();'>"
            + "<em>" + label+"</em></a>");
        }else if(type.equals("help")){
          //Request for help. May be context-sensitive. 
        }else if(type.equals("reset")){
          //Clearing or resetting state. 
        }else if(type.equals("options")){
          //Context-sensitive request for options 
          //or additional operations.
        }else if(type.equals("delete")){
          //Delete item or choice
        }else if(type.equals("unknown")){
          //A generic do element. Equivalent to an 
          //empty string (e. g., type="")
        }else{
          //don't know about this type.
        }
	    }else if(name.equals("go")){
        String href = // %HREF; #REQUIRED
          (String)attributes.get("href"); 
        String sendreferer = // %boolean; "false"
          (String)attributes.get("sendreferer");
        String method = // # (post| get) "get"
          (String)attributes.get("method");
        if(method == null){
          method = "get";
        }
        WmlTask t = deck.newTask();
        t.init("go",href,sendreferer, method);
	    }else if(name.equals("i")){
        deck.currentcard.cardData("<i>");
        endTags.append("</i>");    
	    }else if(name.equals("input")){
        String name_ = // NMTOKEN #REQUIRED 
          (String) attributes.get("name");
        String type_ = // (text| password) "text"
          (String) attributes.get("type");
        if(type_ == null){
          type_ = "text";
        }
        String value =//%vdata; #IMPLIED 
          (String) attributes.get("value");
        if(value == null){
          value = "";
        }
        String format =//CDATA #IMPLIED 
          (String) attributes.get("format");
        String emptyok = //%boolean; "false" 
          (String) attributes.get("emptyok");
        if(emptyok == null){
          emptyok = "false";
        }
        String size = //# %number; #IMPLIED 
          (String) attributes.get("size");
        if(size==null){
          size="10";
        }
        try{
          int v = (Integer.valueOf(size)).intValue();
          if( v>12 || v<1 ){
            size="12";
          }
        }catch(Exception E){
          size="12";
        }
        String maxlength = //%number; #IMPLIED 
          (String) attributes.get("maxlength");
        String tabindex = //%number; #IMPLIED (
          (String) attributes.get("tabindex");
        String title = //%vdata; #IMPLIED 
          (String) attributes.get("title");
        if(title==null){
          title = "";
        }
        String accesskey =//%vdata; #IMPLIED
          (String)attributes.get("accesskey");
        deck.setVar(name_,value);
        deck.currentcard.cardData(title+"<br><input size="+size
                                  + " type="+ type_
                                  + " value=\"$"+ name_+ "\""
                                  + " onchange=\"setVar('"
                                  +name_+"',this.value);\">");
        
	    }else if(name.equals("p")){
        String align = (String)attributes.get("align");
        String mode = (String)attributes.get("mode");
        if(align == null){
          align="left";
        }
        deck.currentcard.cardData("<p align=\""+align+"\">");
        endTags.append("</p>");
	    }else if(name.equals("b")){
        deck.currentcard.cardData("<b>");
        endTags.append("</b>");
	    }else if(name.equals("u")){
        deck.currentcard.cardData("<u>");
        endTags.append("</u>");
	    }else if(name.equals("big")){
        deck.currentcard.cardData("<b>");
        endTags.append("</b>");
	    }else if(name.equals("em")){
        deck.currentcard.cardData("<em>");
        endTags.append("</em>");
	    }else if(name.equals("select")){
        //  title %vdata; #IMPLIED
        String title_ = (String)attributes.get("title");
        
        //  name NMTOKEN #IMPLIED
        String name_ = (String)attributes.get("name");
        
        //  value %vdata; #IMPLIED
        String value = (String)attributes.get("value");
        
        //  iname NMTOKEN #IMPLIED
        String iname = (String)attributes.get("iname");
        
        //  ivalue %vdata; #IMPLIED
        String ivalue = (String)attributes.get("ivalue");
        
        //  multiple %boolean; "false"
        String multiple = (String)attributes.get("multiple");
        boolean multiple_ = true;
        if(multiple == null || 
           (!multiple.equals("true"))){
          multiple_ = false;
        }
        
        //  tabindex %number; #IMPLIED
        String tabindex = (String)attributes.get("tabindex");
        deck.currentcard.beginSelect(title_,name_,value,
                                    iname,ivalue,multiple_);
        //deck.currentcard.cardData("<!--select-->");
        //endTags.append("<!--/select-->");
	    }else if(name.equals("option")){
        String onpick =
          (String)attributes.get("onpick");
        String title_ = 
          (String)attributes.get("title");
        String value =
          (String)attributes.get("value");
        if(onpick!=null && !onpick.equals("")){
          onpick = deck.resolveUrl(onpick);
        }
          //deck.currentcard.cardData("<br><em>&gt;</em><a href=\"javascript:setCard('"+onpick+"');\">");
          //endTags.append("</a>");
          deck.currentcard.addOption(value,title_,onpick);
        
	    }else if(name.equals("postfield")){
        // these are the post fields for the current 'go'
        String _name = (String)attributes.get("name");
        String value = (String)attributes.get("value");
        WmlTask t = deck.currentTask();
        if(t != null){
          t.postfield(_name,value);
        }
	    }else if(name.equals("img")){
        String src = // %HREF; #REQUIRED 
          (String)attributes.get("src");
        String localsrc = //%vdata; #IMPLIED 
          (String)attributes.get("localsrc");
        String alt = //%vdata; #REQUIRED 
          (String)attributes.get("alt");
        String vspace = //%length; "0" 
          (String)attributes.get("vspace");
        String hspace = //%length; "0" 
          (String)attributes.get("hspace");
        String align = //%IAlign; "bottom" 
          (String)attributes.get("align"); 
        String height = //%length; #IMPLIED 
          (String)attributes.get("height");
        String width = //%length; #IMPLIED
          (String)attributes.get("width");
        deck.currentcard.cardData("<img ");
        if(localsrc != null && localsrc.length()>0){
          src=localsrc;
          if(alt == null || alt.length()>0){
            alt=localsrc;
          }
        }
        if(src != null && src.length()>0){
          src = deck.resolveUrl(src);
          deck.currentcard.cardData(" src=\""
                                    +WmlDeckBuilder.imgconverter 
                                    +src+"&.gif\"");
          if(alt != null){
            deck.currentcard.cardData(" alt=\""+alt+"\" ");
          }
        }
        deck.currentcard.cardData(">");
        endTags.append("</img>");	
	    }else if(name.equals("onevent")){
        String tipe = (String)attributes.get("type");
        if(tipe!=null){
          deck.awaitingtask=tipe;
        }
	    }else if(name.equals("prev")){
        deck.newTask();
        WmlTask t = deck.currentTask();
        t.init("prev");
        
	    }else if(name.equals("refresh")){
        deck.newTask();
        WmlTask t = deck.currentTask();
        t.init("refresh");    
	    }else if (name.equals("setvar")){
        WmlTask t = deck.currentTask();
        String varname = (String)attributes.get("name");
        String value = (String)attributes.get("value");
        if(t !=null){
          t.setvar(varname, value);
        }
      }else if(name.equals("template")){
        WmlTemplate t = new WmlTemplate(deck);
        deck.currentcard =  t;
	    }else if(name.equals("table")){
        deck.currentcard.cardData("<table>");
        endTags.append("</table>");
        
	    }else if(name.equals("tr")){
        deck.currentcard.cardData("<tr>");
        endTags.append("</tr>");
        
	    }else if(name.equals("td")){
        deck.currentcard.cardData("<td><font size=1>");
        endTags.append("</font></td>");
        
	    }else if(name.equals("timer")){
        String value =
          (String)attributes.get("value");
        String name_ =
          (String)attributes.get("name");
        if(value != null){
          deck.setVar("aplpicardtimeout"+deck.currentcard.name(),
                      value+"00");
        }else{
          value = "0";
        }
        if(name_ != null){
          deck.setVar(name_, value);
          deck.setVar("aplpicardtimeout"+deck.currentcard.name(),
                      "$"+name_);
        }
        
	    }else{
        deck.currentcard.cardData("<!-- failed to recognize tag ["+name+"]-->");
	    }
	    
    }
    
  /**
   * Finish interpreting the attributes of this element.
   * Any necessary cleanup activities will be performed.
   */
    public void end(){
	    //System.err.println("//ending element ["+name + "]");
	    if(deck == null){
        return;
	    }
	    if(deck.currentcard != null){
        deck.currentcard.cardData(endTags.toString());
	    }
	    if(name.equals("card")){
        deck.currentcard = (WmlCard)null;
	    }else if(name.equals("template")){
        deck.currentcard = (WmlCard)null;
      }else if(name.equals("go")){
        deck.endTask();
	    }else if(name.equals("onevent")){
        deck.awaitingtask = null;
	    }else if(name.equals("prev")){
        deck.endTask();
	    }else if(name.equals("refresh")){
        deck.endTask();
	    }
    }
  }
}