JSPWIKI-1102 attempt number 3 at a clean chartist plugin for jspwiki

jspwiki-plugins/jspwiki-plugins-chartist/pom.xml

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+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+    <parent>
+        <groupId>org.apache.jspwiki</groupId>
+        <artifactId>jspwiki-plugins</artifactId>
+        <version>3.0.0-SNAPSHOT</version>
+    </parent>
+    <artifactId>jspwiki-plugins-chartist</artifactId>
+    <packaging>jar</packaging>
+    <dependencies>
+        <dependency>
+            <groupId>${project.groupId}</groupId>
+            <artifactId>jspwiki-main</artifactId>
+            <version>${project.version}</version>
+            <scope>provided</scope>
+        </dependency>
+    </dependencies>
+
+</project>

jspwiki-plugins/jspwiki-plugins-chartist/readme.txt

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+!!! How to include this plugin with your jspwiki deployment (using maven)
+
+If you're building out your infrastructure, maven can help.
+
+You probably have a project that includes the jspwiki war file as a dependency.
+
+All that's needed to add a dependency for this library.
+
+	<dependency>
+		<groupId>org.apache.jspwiki</groupId>
+		<artifactId>jspwiki-plugins-chartist</artifactId>
+		<version>LATEST</version>
+	</dependency>
+
+Then build as normal.
+
+!!! How to include this plugin with your jspwiki deployment (without maven)
+
+Download the jspwiki chartist-plugin jar file.
+Add it to ./webapps/jspwiki/WEB-INF/lib, replace "jspwiki" with your context path.
+Restart the server.
+
+!!! Removing the plugin from your jspwiki deployment.
+
+Just delete the file from ./WEB-INF/lib/jspwiki-plugins-chartist-VERSION.jar 
+and restart the server.
+
+!!! Upgrading
+
+New version? just replace the old jar file with the new one, then restart the server.
+
+!!! Usage
+
+Edit a wiki page. Then include the chartist plugin. Only one instance is required per wiki page.
+
+	[{org.apache.jspwiki.plugins.chartist.ChartistPlugin}]
+
+Then insert the chart anywhere you need it. Copy inbetween example-start and example-end.
+Note: when copy and pasting, the plain text editor will auto wrap the text in {{{ and }}}. 
+You'll need to remove those. In addition, the plugin reference may get an extra '['. Remove that too.
+
+example-start
+
+%%chartist-line {
+  high: 15,
+  low: -5
+}
+|| Monday || Tuesday || Wednesday || Thursday || Friday
+| 12| 9 | 7  | 8 |  5
+| 2 | 1 | 3.5| 7 |  3
+| 1 | 3 | 4  | 5 |  6 
+/%
+
+example-end
+
+Then save the page. Hopefully a chart will render. If it does not, check the browser console for potential clues.
+
+!!! Maintenance notes
+
+Currently, this is at chartist v1.5.0.
+sourced Dec 2025 by pulling the webjar, then extracting
+the umd.js and css files and placing in the src/main/resources/META-INF/chartist-plugin
+
+The webjar, at this point in time, has a directory with a "." as a path, which is strange.
+This caused the java compiled to to complain, otherwise the webjar is the way to go.
+
+Chartist is MIT licensed.
+

jspwiki-plugins/jspwiki-plugins-chartist/src/main/java/org/apache/jspwiki/plugins/chartist/ChartistPlugin.java

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+/*
+ * Copyright 2025 The Apache Software Foundation.
+ *
+ * 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.
+ */
+
+package org.apache.jspwiki.plugins.chartist;
+
+import java.util.Locale;
+import java.util.Map;
+import org.apache.wiki.api.core.Context;
+import org.apache.wiki.api.exceptions.PluginException;
+import org.apache.wiki.api.plugin.Plugin;
+
+/**
+ * Chartlist-js plugin for JSPWiki.
+ * 
+ * See readme for deployment and usage guide.
+ * @since 3.0.0
+ */
+public class ChartistPlugin implements Plugin {
+
+    @Override
+    public String execute(Context context, Map<String, String> params) throws PluginException {
+        StringBuilder sb = new StringBuilder();
+        sb.append("""
+                  <style type="text/css">
+                  .chartist-options,.chartist-table{
+                      display:none;
+                  }
+                  .ct-chart .ct-label,.ct-chart .ct-label.ct-vertical,.ct-chart .ct-label.ct-horizontal{
+                      font-size:1em;
+                  }
+                  .ct-chart-pie .ct-label{
+                      fill:rgba(255,255,255,.8);
+                  }
+
+                  </style>
+                  <script>
+                  const script = document.createElement('script');
+                  script.src = 'chartist-plugin/index.umd.js';
+                  document.head.appendChild(script);
+
+                  const behavior = document.createElement('script');
+                behavior.src = 'chartist-plugin/Wiki.Chartist.Behavior.js';
+                document.head.appendChild(behavior);
+
+                  const stylesheet = document.createElement('link');
+                  stylesheet.rel = 'stylesheet';
+                  stylesheet.type = 'text/css';
+                  stylesheet.href = 'chartist-plugin/index.css'; 
+                  document.head.appendChild(stylesheet);
+                  </script>
+
+                  """);
+        //<link rel="stylesheet" href="webjars/chartist/dist/index.css" />
+        //<script type="text/javascript" src="webjars/chartist/dist/index.umd.js"></script>
+
+        return sb.toString();
+    }
+
+    @Override
+    public String getSnipExample() {
+        return Plugin.super.getSnipExample();
+    }
+
+    @Override
+    public String getDisplayName(Locale locale) {
+        return Plugin.super.getDisplayName(locale);
+    }
+}
+