initial code to install a contrib from a pdex file

app/src/processing/app/Base.java

@@ -1340,9 +1340,17 @@ public class Base {
       return null;  // no luck
 
     } else if (path.endsWith(CONTRIB_BUNDLE_EXT)) {
-      // TODO Install a contrib here
+      try {
+        // TODO should probably prompt the user first
+        LocalContribution contrib =
+          AvailableContribution.install(this, new File(path));
+        if (contrib == null) {
+          System.err.println("Could not install a contrib from " + path);
+        }
+      } catch (IOException e) {
+        Messages.err("Error while installing " + path, e);
+      }
       return null;
-
     }
 
     return handleOpen(path, false);

app/src/processing/app/contrib/AvailableContribution.java

@@ -23,11 +23,11 @@
 package processing.app.contrib;
 
 import java.io.*;
+import java.util.Enumeration;
+import java.util.zip.ZipEntry;
+import java.util.zip.ZipFile;
 
-import processing.app.Base;
-import processing.app.Language;
-import processing.app.Platform;
-import processing.app.Util;
+import processing.app.*;
 import processing.core.PApplet;
 import processing.data.StringDict;
 import processing.data.StringList;
@@ -83,6 +83,43 @@ public class AvailableContribution extends Contribution {
   }
 
 
+  static ContributionType matchContribType(String path) {
+    String filename = path.substring(path.lastIndexOf('/') + 1);
+    for (ContributionType type : ContributionType.values()) {
+      if (filename.equals(type.getPropertiesName())) {
+        return type;
+      }
+    }
+    return null;
+  }
+
+
+  static public LocalContribution install(Base base, File contribArchive) throws IOException {
+    AvailableContribution ac = null;
+
+    ZipFile zf = new ZipFile(contribArchive);
+    Enumeration entries = zf.entries();
+    while (entries.hasMoreElements()) {
+      ZipEntry entry = (ZipEntry) entries.nextElement();
+      String name = entry.getName();
+      if (name.endsWith(".properties")) {
+        ContributionType type = matchContribType(name);
+        if (type != null) {
+          StringDict params = new StringDict(PApplet.createReader(zf.getInputStream(entry)));
+          ac = new AvailableContribution(type, params);
+          break;
+        }
+      }
+    }
+    zf.close();
+
+    if (ac != null) {
+      return ac.install(base, contribArchive, false, null);
+    }
+    return null;
+  }
+
+
   /**
    * @param contribArchive
    *          a zip file containing the library to install
@@ -109,7 +146,6 @@ public class AvailableContribution extends Contribution {
     }
     Util.unzip(contribArchive, tempFolder);
 
-
     LocalContribution installedContrib = null;
     // Find the first legitimate folder in what we just unzipped
     File contribFolder = type.findCandidate(tempFolder);

todo.txt

@@ -25,6 +25,8 @@ X   standard key shortcuts on macOS https://support.apple.com/en-us/HT201236
 X update to JDK 11.0.12+7
 X rewrite download handler to just use a simple <get>
 _   remove the rest of the jre downloader code
+X initial code to install a contrib from a pdex file
+_   test to make sure it's behaving properly
 
 Sam updates
 X can we get rid of pdexEnabled? does the current code work w/ java tabs?
@@ -42,6 +44,7 @@ o     probably being removed from future OS X versions
 before release
 _ update the README for alpha 6 (and this release too, when ready)
 
+_ add issue for implementing the Linux file associations in install.sh
 
 _ don't allow "Show Sketch Folder" for untitled sketches