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EE4J Compatible Implementation for Jakarta Faces API
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/*
* Copyright (c) 1997, 2020 Oracle and/or its affiliates. All rights reserved.
*
* This program and the accompanying materials are made available under the
* terms of the Eclipse Public License v. 2.0, which is available at
* http://www.eclipse.org/legal/epl-2.0.
*
* This Source Code may also be made available under the following Secondary
* Licenses when the conditions for such availability set forth in the
* Eclipse Public License v. 2.0 are satisfied: GNU General Public License,
* version 2 with the GNU Classpath Exception, which is available at
* https://www.gnu.org/software/classpath/license.html.
*
* SPDX-License-Identifier: EPL-2.0 OR GPL-2.0 WITH Classpath-exception-2.0
*/
package com.sun.faces.facelets.compiler;
import java.util.ArrayList;
import java.util.List;
import java.util.Stack;
import com.sun.faces.facelets.el.ELText;
import jakarta.el.ELException;
import jakarta.faces.view.facelets.CompositeFaceletHandler;
import jakarta.faces.view.facelets.FaceletHandler;
import jakarta.faces.view.facelets.Tag;
import jakarta.faces.view.facelets.TagAttribute;
import jakarta.faces.view.facelets.TagException;
/**
*
* @author Jacob Hookom
* @version $Id$
*/
final class TextUnit extends CompilationUnit {
private final StringBuffer buffer;
private final StringBuffer textBuffer;
private final List instructionBuffer;
private final Stack tags;
private final List children;
private boolean startTagOpen;
private final String alias;
private final String id;
public TextUnit(String alias, String id) {
this.alias = alias;
this.id = id;
buffer = new StringBuffer();
textBuffer = new StringBuffer();
instructionBuffer = new ArrayList<>();
tags = new Stack<>();
children = new ArrayList<>();
startTagOpen = false;
}
@Override
public FaceletHandler createFaceletHandler() {
flushBufferToConfig(true);
if (children.size() == 0) {
return LEAF;
}
FaceletHandler[] h = new FaceletHandler[children.size()];
Object obj;
for (int i = 0; i < h.length; i++) {
obj = children.get(i);
if (obj instanceof FaceletHandler) {
h[i] = (FaceletHandler) obj;
} else {
h[i] = ((CompilationUnit) obj).createFaceletHandler();
}
}
if (h.length == 1) {
return h[0];
}
return new CompositeFaceletHandler(h);
}
private void addInstruction(Instruction instruction) {
flushTextBuffer(false);
instructionBuffer.add(instruction);
}
private void flushTextBuffer(boolean child) {
if (textBuffer.length() > 0) {
String s = textBuffer.toString();
if (child) {
s = trimRight(s);
}
if (s.length() > 0) {
ELText txt = ELText.parse(s, alias);
if (txt != null) {
if (txt.isLiteral()) {
instructionBuffer.add(new LiteralTextInstruction(txt.toString()));
} else {
instructionBuffer.add(new TextInstruction(alias, txt));
}
}
}
}
textBuffer.setLength(0);
}
public void write(String text) {
finishStartTag();
textBuffer.append(text);
buffer.append(text);
}
public void writeInstruction(String text) {
finishStartTag();
ELText el = ELText.parse(text);
if (el.isLiteral()) {
addInstruction(new LiteralXMLInstruction(text));
} else {
addInstruction(new XMLInstruction(el));
}
buffer.append(text);
}
public void writeComment(String text) {
finishStartTag();
ELText el = ELText.parse(text);
if (el.isLiteral()) {
addInstruction(new LiteralCommentInstruction(text));
} else {
addInstruction(new CommentInstruction(el));
}
buffer.append("");
}
public void startTag(Tag tag) {
// finish any previously written tags
finishStartTag();
// push this tag onto the stack
tags.push(tag);
// write it out
buffer.append('<');
buffer.append(tag.getQName());
addInstruction(new StartElementInstruction(tag.getQName()));
TagAttribute[] attrs = tag.getAttributes().getAll();
for (TagAttribute attr : attrs) {
String qname = attr.getQName();
String value = attr.getValue();
buffer.append(' ').append(qname).append("=\"").append(value).append("\"");
ELText txt = ELText.parse(value);
if (txt != null) {
if (txt.isLiteral()) {
addInstruction(new LiteralAttributeInstruction(qname, txt.toString()));
} else {
addInstruction(new AttributeInstruction(alias, qname, txt));
}
}
}
// notify that we have an open tag
startTagOpen = true;
}
private void finishStartTag() {
if (tags.size() > 0 && startTagOpen) {
buffer.append('>');
startTagOpen = false;
}
}
public void endTag() {
Tag tag = (Tag) tags.pop();
addInstruction(new EndElementInstruction(tag.getQName()));
if (startTagOpen) {
buffer.append("/>");
startTagOpen = false;
} else {
buffer.append("');
}
}
@Override
public void addChild(CompilationUnit unit) {
// if we are adding some other kind of unit
// then we need to capture our buffer into a UITextHandler
finishStartTag();
flushBufferToConfig(true);
children.add(unit);
}
protected void flushBufferToConfig(boolean child) {
// // NEW IMPLEMENTATION
// if (true) {
flushTextBuffer(child);
int size = instructionBuffer.size();
if (size > 0) {
try {
String s = buffer.toString();
if (child) {
s = trimRight(s);
}
ELText txt = ELText.parse(s);
if (txt != null) {
Instruction[] instructions = instructionBuffer.toArray(new Instruction[size]);
children.add(new UIInstructionHandler(alias, id, instructions, txt));
instructionBuffer.clear();
}
} catch (ELException e) {
if (tags.size() > 0) {
throw new TagException((Tag) tags.peek(), e.getMessage());
} else {
throw new ELException(alias + ": " + e.getMessage(), e.getCause());
}
}
}
// // KEEP THESE SEPARATE SO LOGIC DOESN'T GET FUBARED
// } else if (this.buffer.length() > 0) {
// String s = this.buffer.toString();
// if (s.trim().length() > 0) {
// if (child) {
// s = trimRight(s);
// }
// if (s.length() > 0) {
// try {
// ELText txt = ELText.parse(s);
// if (txt != null) {
// if (txt.isLiteral()) {
// this.children.add(new UILiteralTextHandler(txt
// .toString()));
// } else {
// this.children.add(new UITextHandler(this.alias,
// txt));
// }
// }
// } catch (ELException e) {
// if (this.tags.size() > 0) {
// throw new TagException((Tag) this.tags.peek(), e
// .getMessage());
// } else {
// throw new ELException(this.alias + ": "
// + e.getMessage(), e.getCause());
// }
// }
// }
// }
// }
// ALWAYS CLEAR FOR BOTH IMPL
buffer.setLength(0);
}
public boolean isClosed() {
return tags.empty();
}
private static String trimRight(String s) {
int i = s.length() - 1;
while (i >= 0) {
if (Character.isWhitespace(s.charAt(i))) {
i--;
} else {
return s.substring(0,i+1);
}
}
return "";
}
@Override
public String toString() {
return "TextUnit[" + children.size() + "]";
}
}