/*
Copyright (c) 2011+, HL7, Inc
All rights reserved.
Redistribution and use in source and binary forms, with or without modification,
are permitted provided that the following conditions are met:
* Redistributions of source code must retain the above copyright notice, this
list of conditions and the following disclaimer.
* Redistributions in binary form must reproduce the above copyright notice,
this list of conditions and the following disclaimer in the documentation
and/or other materials provided with the distribution.
* Neither the name of HL7 nor the names of its contributors may be used to
endorse or promote products derived from this software without specific
prior written permission.
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
POSSIBILITY OF SUCH DAMAGE.
*/
package org.hl7.fhir.utilities.xhtml;
/*
* #%L
* HAPI FHIR - Core Library
* %%
* Copyright (C) 2014 - 2017 University Health Network
* %%
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
* #L%
*/
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.OutputStream;
import java.io.OutputStreamWriter;
import java.io.StringWriter;
import java.io.UnsupportedEncodingException;
import java.io.Writer;
import org.hl7.fhir.utilities.Utilities;
import org.hl7.fhir.utilities.xml.IXMLWriter;
import org.w3c.dom.Element;
public class XhtmlComposer {
public static final String XHTML_NS = "http://www.w3.org/1999/xhtml";
private boolean pretty;
private boolean xmlOnly;
public boolean isPretty() {
return pretty;
}
public XhtmlComposer setPretty(boolean pretty) {
this.pretty = pretty;
return this;
}
public boolean isXmlOnly() {
return xmlOnly;
}
public XhtmlComposer setXmlOnly(boolean xmlOnly) {
this.xmlOnly = xmlOnly;
return this;
}
private Writer dst;
public String compose(XhtmlDocument doc) throws IOException {
StringWriter sdst = new StringWriter();
dst = sdst;
composeDoc(doc);
return sdst.toString();
}
public String compose(XhtmlNode node) throws IOException {
StringWriter sdst = new StringWriter();
dst = sdst;
writeNode("", node);
return sdst.toString();
}
public void compose(OutputStream stream, XhtmlDocument doc) throws IOException {
byte[] bom = new byte[] { (byte)0xEF, (byte)0xBB, (byte)0xBF };
stream.write(bom);
dst = new OutputStreamWriter(stream, "UTF-8");
composeDoc(doc);
dst.flush();
}
private void composeDoc(XhtmlDocument doc) throws IOException {
// headers....
// dst.append("<html>" + (isPretty() ? "\r\n" : ""));
for (XhtmlNode c : doc.getChildNodes())
writeNode(" ", c);
// dst.append("</html>" + (isPretty() ? "\r\n" : ""));
}
private void writeNode(String indent, XhtmlNode node) throws IOException {
if (node.getNodeType() == NodeType.Comment)
writeComment(indent, node);
else if (node.getNodeType() == NodeType.DocType)
writeDocType(node);
else if (node.getNodeType() == NodeType.Instruction)
writeInstruction(node);
else if (node.getNodeType() == NodeType.Element)
writeElement(indent, node);
else if (node.getNodeType() == NodeType.Document)
writeDocument(indent, node);
else if (node.getNodeType() == NodeType.Text)
writeText(node);
else if (node.getNodeType() == null)
throw new IOException("Null node type");
else
throw new IOException("Unknown node type: "+node.getNodeType().toString());
}
private void writeText(XhtmlNode node) throws IOException {
for (char c : node.getContent().toCharArray())
{
if (c == '&')
dst.append("&");
else if (c == '<')
dst.append("<");
else if (c == '>')
dst.append(">");
else if (c == '"')
dst.append(""");
else if (xmlOnly) {
dst.append(c);
} else {
if (c == XhtmlNode.NBSP.charAt(0))
dst.append(" ");
else if (c == (char) 0xA7)
dst.append("§");
else if (c == (char) 169)
dst.append("©");
else if (c == (char) 8482)
dst.append("™");
else if (c == (char) 956)
dst.append("μ");
else if (c == (char) 174)
dst.append("®");
else
dst.append(c);
}
}
}
private void writeComment(String indent, XhtmlNode node) throws IOException {
dst.append(indent + "<!-- " + node.getContent().trim() + " -->" + (isPretty() ? "\r\n" : ""));
}
private void writeDocType(XhtmlNode node) throws IOException {
dst.append("<!" + node.getContent() + ">\r\n");
}
private void writeInstruction(XhtmlNode node) throws IOException {
dst.append("<?" + node.getContent() + "?>\r\n");
}
private String escapeHtml(String s) {
if (s == null || s.equals(""))
return null;
StringBuilder b = new StringBuilder();
for (char c : s.toCharArray())
if (c == '<')
b.append("<");
else if (c == '>')
b.append(">");
else if (c == '"')
b.append(""");
else if (c == '&')
b.append("&");
else
b.append(c);
return b.toString();
}
private String attributes(XhtmlNode node) {
StringBuilder s = new StringBuilder();
for (String n : node.getAttributes().keySet())
s.append(" " + n + "=\"" + escapeHtml(node.getAttributes().get(n)) + "\"");
return s.toString();
}
private void writeElement(String indent, XhtmlNode node) throws IOException {
if (!pretty)
indent = "";
if (node.getChildNodes().size() == 0)
dst.append(indent + "<" + node.getName() + attributes(node) + "/>" + (isPretty() ? "\r\n" : ""));
else {
boolean act = node.allChildrenAreText();
if (act || !pretty)
dst.append(indent + "<" + node.getName() + attributes(node)+">");
else
dst.append(indent + "<" + node.getName() + attributes(node) + ">\r\n");
if (node.getName() == "head" && node.getElement("meta") == null)
dst.append(indent + " <meta http-equiv=\"Content-Type\" content=\"text/html; charset=UTF-8\"/>" + (isPretty() ? "\r\n" : ""));
for (XhtmlNode c : node.getChildNodes())
writeNode(indent + " ", c);
if (act)
dst.append("</" + node.getName() + ">" + (isPretty() ? "\r\n" : ""));
else if (node.getChildNodes().get(node.getChildNodes().size() - 1).getNodeType() == NodeType.Text)
dst.append((isPretty() ? "\r\n"+ indent : "") + "</" + node.getName() + ">" + (isPretty() ? "\r\n" : ""));
else
dst.append(indent + "</" + node.getName() + ">" + (isPretty() ? "\r\n" : ""));
}
}
private void writeDocument(String indent, XhtmlNode node) throws IOException {
indent = "";
for (XhtmlNode c : node.getChildNodes())
writeNode(indent, c);
}
public void compose(IXMLWriter xml, XhtmlNode node) throws IOException {
if (node.getNodeType() == NodeType.Comment)
xml.comment(node.getContent(), isPretty());
else if (node.getNodeType() == NodeType.Element)
composeElement(xml, node);
else if (node.getNodeType() == NodeType.Text)
xml.text(node.getContent());
else
throw new Error("Unhandled node type: "+node.getNodeType().toString());
}
private void composeElement(IXMLWriter xml, XhtmlNode node) throws IOException {
for (String n : node.getAttributes().keySet()) {
if (n.equals("xmlns"))
xml.setDefaultNamespace(node.getAttributes().get(n));
else if (n.startsWith("xmlns:"))
xml.namespace(n.substring(6), node.getAttributes().get(n));
else
xml.attribute(n, node.getAttributes().get(n));
}
xml.enter(XHTML_NS, node.getName());
for (XhtmlNode n : node.getChildNodes())
compose(xml, n);
xml.exit(XHTML_NS, node.getName());
}
public String composePlainText(XhtmlNode x) {
StringBuilder b = new StringBuilder();
composePlainText(x, b, false);
return b.toString().trim();
}
private boolean composePlainText(XhtmlNode x, StringBuilder b, boolean lastWS) {
if (x.getNodeType() == NodeType.Text) {
String s = x.getContent();
if (!lastWS & (s.startsWith(" ") || s.startsWith("\r") || s.startsWith("\n") || s.endsWith("\t"))) {
b.append(" ");
lastWS = true;
}
String st = s.trim().replace("\r", " ").replace("\n", " ").replace("\t", " ");
while (st.contains(" "))
st = st.replace(" ", " ");
if (!Utilities.noString(st)) {
b.append(st);
lastWS = false;
if (!lastWS & (s.endsWith(" ") || s.endsWith("\r") || s.endsWith("\n") || s.endsWith("\t"))) {
b.append(" ");
lastWS = true;
}
}
return lastWS;
} else if (x.getNodeType() == NodeType.Element) {
if (x.getName().equals("li")) {
b.append("* ");
lastWS = true;
}
for (XhtmlNode n : x.getChildNodes()) {
lastWS = composePlainText(n, b, lastWS);
}
if (x.getName().equals("p")) {
b.append("\r\n\r\n");
lastWS = true;
}
if (x.getName().equals("br") || x.getName().equals("li")) {
b.append("\r\n");
lastWS = true;
}
return lastWS;
} else
return lastWS;
}
public void compose(Element div, XhtmlNode x) {
for (XhtmlNode child : x.getChildNodes()) {
appendChild(div, child);
}
}
private void appendChild(Element e, XhtmlNode node) {
if (node.getNodeType() == NodeType.Comment)
e.appendChild(e.getOwnerDocument().createComment(node.getContent()));
else if (node.getNodeType() == NodeType.DocType)
throw new Error("not done yet");
else if (node.getNodeType() == NodeType.Instruction)
e.appendChild(e.getOwnerDocument().createProcessingInstruction("", node.getContent()));
else if (node.getNodeType() == NodeType.Text)
e.appendChild(e.getOwnerDocument().createTextNode(node.getContent()));
else if (node.getNodeType() == NodeType.Element) {
Element child = e.getOwnerDocument().createElementNS(XHTML_NS, node.getName());
e.appendChild(child);
for (XhtmlNode c : node.getChildNodes()) {
appendChild(child, c);
}
} else
throw new Error("Unknown node type: "+node.getNodeType().toString());
}
public void compose(OutputStream stream, XhtmlNode x) throws IOException {
byte[] bom = new byte[] { (byte)0xEF, (byte)0xBB, (byte)0xBF };
stream.write(bom);
dst = new OutputStreamWriter(stream, "UTF-8");
dst.append("<html><head><link rel=\"stylesheet\" href=\"fhir.css\"/></head><body>\r\n");
writeNode("", x);
dst.append("</body></html>\r\n");
dst.flush();
}
public void composeDocument(FileOutputStream f, XhtmlNode xhtml) throws IOException {
byte[] bom = new byte[] { (byte)0xEF, (byte)0xBB, (byte)0xBF };
f.write(bom);
dst = new OutputStreamWriter(f, "UTF-8");
writeNode("", xhtml);
dst.flush();
dst.close();
}
public String composeEx(XhtmlNode node) {
try {
return compose(node);
} catch (IOException e) {
throw new Error(e);
}
}
}