Better Plugin Writing

Resolves #394

You can now write plugins from the Plugin Writer in BCV, or from disk. BCV will read the last edit dates on both and use the latest version.

As a bonus BCV will self-update the pane to keep the BCV plugin writer synced with your local file. Local files are also overwritten when the plugin writer is used to edit the plugin, then ran.

src/main/java/the/bytecode/club/bytecodeviewer/plugin/PluginWriter.java

@@ -37,6 +37,8 @@ import the.bytecode.club.bytecodeviewer.util.SyntaxLanguage;
 
 import javax.swing.*;
 import java.awt.*;
+import java.awt.event.KeyAdapter;
+import java.awt.event.KeyEvent;
 import java.io.File;
 import java.io.IOException;
 import java.nio.charset.StandardCharsets;
@@ -58,6 +60,7 @@ public class PluginWriter extends JFrame
     private String content;
     private String pluginName;
     private File savePath;
+    private long lastModifiedPluginWriterPane = 0;
 
     public PluginWriter(PluginTemplate template) throws IOException
     {
@@ -86,6 +89,15 @@ public class PluginWriter extends JFrame
         SyntaxLanguage.setLanguage(area, pluginName);
         content = null;
 
+        area.addKeyListener(new KeyAdapter()
+        {
+            @Override
+            public void keyTyped(KeyEvent e)
+            {
+                lastModifiedPluginWriterPane = System.currentTimeMillis();
+            }
+        });
+
         JButton run = new JButton("Run");
 
         JMenuBar menuBar = new JMenuBar();
@@ -170,11 +182,42 @@ public class PluginWriter extends JFrame
 
         try
         {
-            //write to temporary file location
-            if(savePath != null)
-                Files.copy(savePath, tempFile);
-            else
-                Files.write(area.getText().getBytes(StandardCharsets.UTF_8), tempFile);
+            if(savePath != null) //opened a plugin from (Plugins>Open Plugin or Plugins>Recent Plugins)
+            {
+                //original save path should be overwritten
+                if(savePath.lastModified() <= lastModifiedPluginWriterPane)
+                {
+                    Files.write(area.getText().getBytes(StandardCharsets.UTF_8), savePath); //overwrite original plugin location with new data
+                    Files.write(area.getText().getBytes(StandardCharsets.UTF_8), tempFile); //write to temporary file location
+                }
+                else
+                {
+                    Files.copy(savePath, tempFile); //write to temporary file location
+
+                    //update content from latest disk data
+                    content = DiskReader.loadAsString(savePath.getAbsolutePath());
+
+                    //update plugin writer UI on disk update
+                    SwingUtilities.invokeLater(()->
+                    {
+                        try
+                        {
+                            int caretPosition = area.getCaretPosition();
+
+                            area.setText(content);
+                            area.setCaretPosition(caretPosition);
+                        }
+                        catch (Exception e)
+                        {
+                            e.printStackTrace();
+                        }
+                    });
+                }
+            }
+            else //temp plugin editing (Plugins>New Java Plugin>Run)
+            {
+                Files.write(area.getText().getBytes(StandardCharsets.UTF_8), tempFile); //write to temporary file location
+            }
 
             //run plugin from that location
             PluginManager.runPlugin(tempFile);
@@ -232,6 +275,7 @@ public class PluginWriter extends JFrame
             DiskWriter.replaceFile(savePath.getAbsolutePath(), area.getText(), false);
             addRecentPlugin(savePath);
         }, "Plugin Editor Save");
+
         exportThread.start();
     }