From 940fa5410fb49b29681317e8a1e12ed42586ff12 Mon Sep 17 00:00:00 2001
From: Ben Fry <ben@fathom.info>
Date: Wed, 15 Feb 2023 22:33:34 -0500
Subject: [PATCH] start work on protocol handler; first on macOS

---
 .../app/platform/DefaultPlatform.java         | 34 +++++++++++++++++++
 build/build.xml                               |  4 +++
 todo.txt                                      |  7 ++--
 3 files changed, 43 insertions(+), 2 deletions(-)

diff --git a/app/src/processing/app/platform/DefaultPlatform.java b/app/src/processing/app/platform/DefaultPlatform.java
index c2b858093..89931da84 100644
--- a/app/src/processing/app/platform/DefaultPlatform.java
+++ b/app/src/processing/app/platform/DefaultPlatform.java
@@ -26,6 +26,8 @@ package processing.app.platform;
 import java.awt.Desktop;
 import java.awt.Font;
 import java.io.File;
+import java.io.IOException;
+import java.net.URI;
 
 import javax.swing.UIManager;
 import javax.swing.border.EmptyBorder;
@@ -37,6 +39,7 @@ import com.sun.jna.Native;
 
 import processing.app.Base;
 import processing.app.Preferences;
+import processing.app.Util;
 import processing.app.ui.Toolkit;
 import processing.awt.ShimAWT;
 import processing.core.PApplet;
@@ -95,6 +98,37 @@ public class DefaultPlatform {
 
   public void initBase(Base base) {
     this.base = base;
+
+    final Desktop desktop = Desktop.getDesktop();
+    desktop.setOpenURIHandler((event) -> {
+      // https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/net/URI.html
+      URI uri = event.getURI();
+      String location = uri.toString().substring(6);
+      if (location.length() > 0) {
+        System.out.println("location is " + location);
+        // if it leads with a slash, then it's a file url
+        if (location.charAt(0) == '/') {
+          base.handleOpen(location);  // it's a full path to a file
+        } else {
+          // turn it into an https url
+          final String url = "https://" + location;
+          if (location.toLowerCase().endsWith(".pdez") ||
+              location.toLowerCase().endsWith(".pdex")) {
+            String extension = location.substring(location.length() - 5);
+            try {
+              File tempFile = File.createTempFile("scheme", extension);
+              if (PApplet.saveStream(tempFile, Util.createInput(url))) {
+                base.handleOpen(tempFile.getAbsolutePath());
+              } else {
+                System.err.println("Could not open " + tempFile);
+              }
+            } catch (IOException e) {
+              e.printStackTrace();
+            }
+          }
+        }
+      }
+    });
   }
 
 
diff --git a/build/build.xml b/build/build.xml
index 0591b5f82..e78441953 100644
--- a/build/build.xml
+++ b/build/build.xml
@@ -571,6 +571,10 @@
                       role="Viewer">
       </bundledocument>
 
+      <scheme value="pde">
+        <!-- implements pde:// scheme for URLs -->
+      </scheme>
+
       <!-- !@#*&$ the @2x splash screen implementation was removed by Oracle -->
       <!-- tiffutil -cathidpicheck about.png about\@2x.png -out about.tiff -->
       <!--<option value="-splash:$APP_ROOT/Contents/Java/lib/about.png" />-->
diff --git a/todo.txt b/todo.txt
index c80517c03..408b38dd7 100755
--- a/todo.txt
+++ b/todo.txt
@@ -3,6 +3,11 @@ X application exported to the wrong folder
 X   https://github.com/processing/processing4/issues/601
 X more /tmp folder problems with Linux (may be the subdirectories?)
 _   https://github.com/processing/processing4/issues/666
+_ add a protocol handler for pdex and pdez
+_   https://github.com/processing/processing4/issues/559
+X   implemented for macOS
+_   need to also warn people about running 'em
+
 
 python (api changes mean this is 4.2)
 X move ExportDialog to processing.app.ui (out of Java Mode) so it can be used by Jython
@@ -31,8 +36,6 @@ _ export to IntelliJ? how tricky?
 _   just copy jars to /lib?
 _   point to binaries in /Applications/Processing.app? (no)
 
-_ add a protocol handler for pdex and pdez
-_   https://github.com/processing/processing4/issues/559
 
 
 known issues