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frontend 2.0: initial version

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- auto refresh function
- light and dark theme
- monaco editor (vscode) with "apex" as syntax highlighting language
  * apex seems to work quite fine (better than no highlighting)
  * future possibility: own plantuml language syntax support
  * future possibility: autocomplete (to much work but maybe partial)
    - implemented example for `!theme ...`
    - implemented example for `<&icon>`
  * future possibility: code validation
    - implemented example for `@start...` and `@end...`:
      * should be the first or last command
      * should be of the some type (e.g. `@startyaml` and @endyaml)
      * should be used exactly once per document/diagram
- editor and preview is splitable into two windows like the
  "Extract window" functionality on
  (plantuml.com)[https://www.plantuml.com/plantuml]
- multi index / multi paging diagram support
- diagram can be displayed/rended as PNG, SVG, ASCII Art or PDF
- Ctrl+s download the PlantUML Code as code file (diagram.puml)
- Ctrl+, opens the settings and Esc closes the settings
This commit is contained in:
Florian
2023-04-29 00:29:29 +02:00
committed by PlantUML
parent 763976abdd
commit f727c6dd13
46 changed files with 2638 additions and 761 deletions
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174
src/main/java/net/sourceforge/plantuml/servlet/PlantUmlUIHelperServlet.java Normal file
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/* ========================================================================
* PlantUML : a free UML diagram generator
* ========================================================================
*
* Project Info: https://plantuml.com
*
* This file is part of PlantUML.
*
* PlantUML 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 3 of the License, or
* (at your option) any later version.
*
* PlantUML 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 General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
* USA.
*/
package net.sourceforge.plantuml.servlet;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.StringWriter;
import java.io.Writer;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.logging.Level;
import java.util.logging.Logger;
import java.util.stream.Collectors;
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.parsers.ParserConfigurationException;
import javax.xml.transform.OutputKeys;
import javax.xml.transform.Transformer;
import javax.xml.transform.TransformerException;
import javax.xml.transform.TransformerFactory;
import javax.xml.transform.dom.DOMSource;
import javax.xml.transform.stream.StreamResult;
import jakarta.servlet.ServletException;
import jakarta.servlet.http.HttpServlet;
import jakarta.servlet.http.HttpServletRequest;
import jakarta.servlet.http.HttpServletResponse;
import net.sourceforge.plantuml.theme.ThemeUtils;
import net.sourceforge.plantuml.openiconic.data.DummyIcon;
import org.w3c.dom.Document;
import org.w3c.dom.NodeList;
import org.xml.sax.SAXException;
/**
* Small PlantUML frontend or UI helper.
*/
@SuppressWarnings("SERIAL")
public class PlantUmlUIHelperServlet extends HttpServlet {
private interface HelperConsumer {
void accept(HttpServletRequest request, HttpServletResponse response) throws IOException;
}
private final Map<String, HelperConsumer> helpers = new HashMap<>();
private String svgIconsSpriteCache = null;
public PlantUmlUIHelperServlet() {
// add all supported request items/helper methods
helpers.put("icons.svg", this::sendIconsSprite);
helpers.put("icons", this::sendIcons);
helpers.put("themes", this::sendThemes);
}
@Override
public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
request.setCharacterEncoding("UTF-8");
final String requestItem = request.getParameter("request");
final HelperConsumer requestHelper = this.helpers.get(requestItem);
String errorMsg = null;
if (requestItem == null) {
errorMsg = "Request item not set.";
} else if (requestHelper == null) {
errorMsg = "Unknown requested item: " + requestItem;
}
if (errorMsg != null) {
response.addHeader("Access-Control-Allow-Origin", "*");
response.setContentType("text/plain;charset=UTF-8");
response.getWriter().write(errorMsg);
response.setStatus(HttpServletResponse.SC_BAD_REQUEST);
return;
}
requestHelper.accept(request, response);
}
private String toJson(List<String> list) {
return "[" + list.stream()
.map(item -> "\"" + item.replace("\"", "\\\"") + "\"")
.collect(Collectors.joining(",")) + "]";
}
private void sendJson(HttpServletResponse response, String json) throws IOException {
response.addHeader("Access-Control-Allow-Origin", "*");
response.setContentType("application/json;charset=UTF-8");
response.getWriter().write(json);
}
private List<String> getIcons() throws IOException {
InputStream in = DummyIcon.class.getResourceAsStream("all.txt");
try (BufferedReader br = new BufferedReader(new InputStreamReader(in))) {
return br.lines().collect(Collectors.toList());
}
}
private void sendIconsSprite(HttpServletRequest request, HttpServletResponse response) throws IOException {
if (svgIconsSpriteCache == null) {
// NOTE: all icons has the following svg tag attributes: width="8" height="8" viewBox="0 0 8 8"
List<String> iconNames = getIcons();
StringBuilder sprite = new StringBuilder();
sprite.append("<svg xmlns=\"http://www.w3.org/2000/svg\" width=\"8\" height=\"8\" viewBox=\"0 0 8 8\">\n");
sprite.append("<defs>\n");
sprite.append(" <style><![CDATA[\n");
sprite.append(" .sprite { display: none; }\n");
sprite.append(" .sprite:target { display: inline; }\n");
sprite.append(" ]]></style>\n");
sprite.append("</defs>\n");
for (String name : iconNames) {
try (InputStream in = DummyIcon.class.getResourceAsStream(name + ".svg")) {
DocumentBuilder db = DocumentBuilderFactory.newInstance().newDocumentBuilder();
Document doc = db.parse(in);
Writer out = new StringWriter();
out.write("<g class=\"sprite\" id=\"" + name + "\">");
Transformer tf = TransformerFactory.newInstance().newTransformer();
tf.setOutputProperty(OutputKeys.OMIT_XML_DECLARATION, "yes");
tf.setOutputProperty(OutputKeys.ENCODING, "UTF-8");
tf.setOutputProperty(OutputKeys.INDENT, "no");
NodeList svgInnerNodes = doc.getElementsByTagName("svg").item(0).getChildNodes();
for (int index = 0; index < svgInnerNodes.getLength(); index++) {
tf.transform(new DOMSource(svgInnerNodes.item(index)), new StreamResult(out));
}
out.write("</g>");
sprite.append(out.toString() + "\n");
} catch (ParserConfigurationException | SAXException | TransformerException ex) {
// skip icons which can not be parsed/read
Logger logger = Logger.getLogger("com.plantuml");
logger.log(Level.WARNING, "SVG icon '{0}' could not be parsed. Skip!", name);
}
}
sprite.append("</svg>\n");
svgIconsSpriteCache = sprite.toString();
}
response.addHeader("Access-Control-Allow-Origin", "*");
response.setContentType("image/svg+xml;charset=UTF-8");
response.getWriter().write(svgIconsSpriteCache);
}
private void sendIcons(HttpServletRequest request, HttpServletResponse response) throws IOException {
sendJson(response, toJson(getIcons()));
}
private void sendThemes(HttpServletRequest request, HttpServletResponse response) throws IOException {
sendJson(response, toJson(ThemeUtils.getAllThemeNames()));
}
}