/*
* Copyright (c) 1998-2011 Caucho Technology -- all rights reserved
*
* This file is part of Resin(R) Open Source
*
* Each copy or derived work must preserve the copyright notice and this
* notice unmodified.
*
* Resin Open Source is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* Resin Open Source is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE, or any warranty
* of NON-INFRINGEMENT. See the GNU General Public License for more
* details.
*
* You should have received a copy of the GNU General Public License
* along with Resin Open Source; if not, write to the
*
* Free Software Foundation, Inc.
* 59 Temple Place, Suite 330
* Boston, MA 02111-1307 USA
*
* @author Scott Ferguson
*/
package com.caucho.jsp.java;
import com.caucho.jsp.JspParseException;
import com.caucho.jsp.TagInstance;
import com.caucho.vfs.WriteStream;
import com.caucho.xml.QName;
import com.caucho.xml.XmlChar;
import java.io.IOException;
/**
* Represents a jsp:attribute node
*/
public class JspAttribute extends JspFragmentNode {
private static final QName NAME = new QName("name");
private static final QName TRIM = new QName("trim");
private QName _name;
private boolean _trim = true;
private TagInstance _tag;
private boolean _oldLocalScriptingInvalid;
public JspAttribute()
{
}
/**
* Returns the attribute name.
*/
public QName getName()
{
return _name;
}
/**
* Returns true if trimming is enabled.
*/
public boolean isTrim()
{
return _trim;
}
/**
* Adds an attribute.
*/
public void addAttribute(QName name, String value)
throws JspParseException
{
if (NAME.equals(name))
_name = _gen.getParseState().getQName(value);
else if (TRIM.equals(name))
_trim = value.equals("true");
else
throw error(L.l("`{0}' is an unknown attribute for jsp:attribute.",
name));
}
/**
* Called when the attributes end.
*/
public void endAttributes()
throws JspParseException
{
_oldLocalScriptingInvalid = _parseState.isLocalScriptingInvalid();
// jsp/18di
// _parseState.setScriptingInvalid(true);
super.endAttributes();
}
/**
* Adds a text node.
*/
public JspNode addText(String text)
throws JspParseException
{
JspNode node = new StaticText(_gen, text, this);
addChild(node);
return node;
}
/**
* Adds an attribute.
*/
public void endElement()
throws JspParseException
{
_parseState.setLocalScriptingInvalid(_oldLocalScriptingInvalid);
if (_name == null)
throw error(L.l("jsp:attribute needs a `name' attribute."));
if (_trim) {
prefix_loop:
while (_children.size() > 0) {
JspNode node = (JspNode) _children.get(0);
if (! (node instanceof StaticText))
break;
StaticText textNode = (StaticText) node;
String text = textNode.getText();
for (int i = 0; i < text.length(); i++) {
if (! XmlChar.isWhitespace(text.charAt(i))) {
textNode.setText(text.substring(i));
break prefix_loop;
}
}
_children.remove(0);
}
suffix_loop:
while (_children.size() > 0) {
JspNode node = _children.get(_children.size() - 1);
if (! (node instanceof StaticText))
break;
StaticText textNode = (StaticText) node;
String text = textNode.getText();
for (int i = text.length() - 1; i >= 0; i--) {
if (! XmlChar.isWhitespace(text.charAt(i))) {
textNode.setText(text.substring(0, i + 1));
break suffix_loop;
}
}
_children.remove(_children.size() - 1);
}
}
}
/**
* Returns the root tag instance of the root.
*/
public TagInstance getTag()
{
if (_tag == null)
_tag = new TagInstance(_gen.getTagManager());
return _tag;
}
/**
* Returns true if the children are static.
*/
public boolean isStatic()
{
return isChildrenStatic();
}
/**
* Generates the XML text representation for the tag validation.
*
* @param os write stream to the generated XML.
*/
public void printXml(WriteStream os)
throws IOException
{
os.print("<jsp:attribute name=\"" + _name + "\">");
printXmlChildren(os);
os.print("</jsp:attribute>");
}
/**
* Generates the prologue.
*/
public void generatePrologue(JspJavaWriter out)
throws Exception
{
JspNode parent = getParent();
if (! isJspFragment()) {
generatePrologueChildren(out);
return;
}
TagInstance parentTag = getParent().getTag();
if (parentTag == null || parentTag.getId() == null) {
}
else if (parentTag.isSimpleTag())
getTag().setId(TagInstance.FRAGMENT_WITH_SIMPLE_PARENT);
else
getTag().setId(TagInstance.FRAGMENT_WITH_TAG_PARENT);
super.generatePrologue(out);
}
/**
* Generates the fragment as a value.
*/
String generateValue(Class type)
throws Exception
{
if (isStatic()) {
String text = getStaticText();
if (_trim)
text = text.trim();
return stringToValue(type, '"' + escapeJavaString(text) + '"');
}
else {
return stringToValue(type, generateValue());
}
}
/**
* Generates the code for a fragment.
*/
protected String generateValue()
throws Exception
{
if (! isStatic())
return super.generateValue();
else if (_trim)
return '"' + escapeJavaString(getStaticText().trim()) + '"';
else
return '"' + escapeJavaString(getStaticText()) + '"';
}
}