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/*
* {{{ header & license
* Copyright (c) 2007 Vianney le Clément
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public License
* as published by the Free Software Foundation; either version 2.1
* of the License, or (at your option) any later version.
*
* This program 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. See the
* GNU Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
* }}}
*/
package org.xhtmlrenderer.demo.browser.swt;
import org.eclipse.swt.graphics.Device;
import org.xhtmlrenderer.demo.browser.DemoMarker;
import org.xhtmlrenderer.demo.browser.DirectoryLister;
import org.xhtmlrenderer.demo.browser.PlainTextXMLReader;
import org.xhtmlrenderer.demo.browser.swt.DemosNavigation.Demo;
import org.xhtmlrenderer.resource.CSSResource;
import org.xhtmlrenderer.resource.ImageResource;
import org.xhtmlrenderer.resource.XMLResource;
import org.xhtmlrenderer.swt.NaiveUserAgent;
import org.xhtmlrenderer.util.GeneralUtil;
import org.xhtmlrenderer.util.IOUtil;
import org.xhtmlrenderer.util.Uu;
import org.xhtmlrenderer.util.XRLog;
import org.xml.sax.InputSource;
import javax.annotation.CheckReturnValue;
import javax.annotation.Nullable;
import javax.annotation.ParametersAreNonnullByDefault;
import javax.xml.transform.sax.SAXSource;
import java.io.File;
import java.io.IOException;
import java.io.InputStream;
import java.io.StringReader;
import java.net.MalformedURLException;
import java.net.URI;
import java.net.URISyntaxException;
import java.net.URL;
import java.net.URLConnection;
@ParametersAreNonnullByDefault
public class BrowserUserAgent extends NaiveUserAgent {
private final DemosNavigation _demos;
private final History _history;
public BrowserUserAgent(Device device) {
super(device);
_demos = new DemosNavigation(this);
_history = new History();
}
@Override
@Nullable
@CheckReturnValue
public String resolveURI(@Nullable String uri) {
if (uri == null) return null;
final String burl = getBaseURL();
if (uri.trim().isEmpty()) return burl; //jar URLs don't resolve this right
URL ref = null;
if (uri.startsWith("demo:")) {
DemoMarker marker = new DemoMarker();
String short_url = uri.substring(5);
if (!short_url.startsWith("/")) {
short_url = "/" + short_url;
}
ref = marker.getClass().getResource(short_url);
Uu.p("ref = " + ref);
} else if (uri.startsWith("demoNav:")) {
DemoMarker marker = new DemoMarker();
String short_url = uri.substring("demoNav:".length());
Demo demo = null;
if (short_url.equalsIgnoreCase("back")) {
demo = _demos.previous();
} else if (short_url.equalsIgnoreCase("forward")) {
demo = _demos.next();
}
if (demo != null) {
try {
String duri = demo.getUrl();
if (duri.startsWith("demo:")) {
ref = new URL(resolveURI(duri));
} else {
ref = new URL(duri);
}
} catch (MalformedURLException e) {
Uu.p("URI/URL is malformed: %s or %s (caused by: %s)".formatted(burl, uri, e));
}
} else {
if (!short_url.startsWith("/")) {
short_url = "/" + short_url;
}
ref = marker.getClass().getResource(short_url);
}
Uu.p("Demo navigation URI, ref = " + ref);
} else if (uri.startsWith("javascript")) {
Uu.p("Javascript URI, ignoring: " + uri);
} else if (uri.startsWith("news")) {
Uu.p("News URI, ignoring: " + uri);
} else {
try {
URL base;
if (burl == null || burl.isEmpty()) {
base = new File(".").toURI().toURL();
} else {
base = new URL(burl);
}
ref = new URL(base, uri);
} catch (MalformedURLException e) {
Uu.p("URI/URL is malformed: %s or %s (caused by: %s)".formatted(burl, uri, e));
}
}
if (ref == null)
return null;
else
return ref.toExternalForm();
}
@Override
public void setBaseURL(String url) {
super.setBaseURL(resolveURI(url));
}
public String resolveFullURI(String uri) {
uri = resolveURI(uri);
if (uri == null) {
return null;
}
if (uri.startsWith("demo:")) {
uri = uri.substring(5);
if (!uri.startsWith("/")) {
uri = "/" + uri;
}
URL url = getClass().getResource(uri);
if (url == null) {
return "";
}
return url.toExternalForm();
}
return uri;
}
@Override
public XMLResource getXMLResource(String uri) {
uri = resolveFullURI(uri);
if (uri != null && uri.startsWith("file:")) {
File file;
try {
StringBuilder sbURI = GeneralUtil.htmlEscapeSpace(uri);
int i = sbURI.indexOf("#");
if (i >= 0) {
// delete fragment portion
sbURI.delete(i, sbURI.length());
}
XRLog.general("Encoded URI: " + sbURI);
file = new File(new URI(sbURI.toString()));
} catch (URISyntaxException e) {
XRLog.exception("Invalid file URI " + uri, e);
return getNotFoundDocument(uri);
}
if (file.isDirectory()) {
String dirList = DirectoryLister.list(file);
return XMLResource.load(new StringReader(dirList));
}
}
XMLResource xr = null;
URLConnection uc;
InputStream inputStream = null;
try {
uc = new URL(uri).openConnection();
uc.connect();
String contentType = uc.getContentType();
// Maybe should pop up a choice when content/unknown!
if (contentType.equals("text/plain")
|| contentType.equals("content/unknown")) {
inputStream = uc.getInputStream();
SAXSource source = new SAXSource(new PlainTextXMLReader(
inputStream), new InputSource());
xr = XMLResource.load(source);
} else if (contentType.startsWith("image")) {
String doc = "![](" + uri + ")
";
xr = XMLResource.load(new StringReader(doc));
} else {
inputStream = uc.getInputStream();
xr = XMLResource.load(inputStream);
}
} catch (MalformedURLException e) {
XRLog.exception("bad URL given: " + uri, e);
} catch (IOException e) {
XRLog.exception("IO problem for " + uri, e);
} finally {
IOUtil.close(inputStream);
}
if (xr == null) {
xr = getNotFoundDocument(uri);
}
return xr;
}
@Override
public CSSResource getCSSResource(String uri) {
uri = resolveFullURI(uri);
return super.getCSSResource(uri);
}
@Override
public ImageResource getImageResource(String uri) {
uri = resolveFullURI(uri);
return super.getImageResource(uri);
}
/**
* Used internally when a document can't be loaded--returns XHTML as an
* XMLResource indicating that fact.
*
* @param uri The URI which could not be loaded.
*
* @return An XMLResource containing XML which about the failure.
*/
private XMLResource getNotFoundDocument(String uri) {
XMLResource xr;
String notFound = "Document not found
Could not access URI
"
+ uri + "";
xr = XMLResource.load(new StringReader(notFound));
return xr;
}
@Override
public boolean isVisited(String uri) {
return _history.contains(uri);
}
public DemosNavigation getDemos() {
return _demos;
}
public History getHistory() {
return _history;
}
}