Sync up to official master

.gitignore

@@ -4,6 +4,9 @@
 *~
 /build/shared/reference.zip
 
+# temporary, until we complete the move to IntelliJ
+*.iml
+/.idea
 
 # via https://github.com/github/gitignore/blob/master/Global/JetBrains.gitignore
 # Covers JetBrains IDEs: IntelliJ, RubyMine, PhpStorm, AppCode, PyCharm, CLion, Android Studio and WebStorm

app/src/processing/app/RunnerListenerEdtAdapter.java

@@ -0,0 +1,48 @@
+package processing.app;
+
+import java.awt.EventQueue;
+
+public class RunnerListenerEdtAdapter implements RunnerListener {
+
+  private RunnerListener wrapped;
+
+  public RunnerListenerEdtAdapter(RunnerListener wrapped) {
+    this.wrapped = wrapped;
+  }
+
+  @Override
+  public void statusError(String message) {
+    EventQueue.invokeLater(() -> wrapped.statusError(message));
+  }
+
+  @Override
+  public void statusError(Exception exception) {
+    EventQueue.invokeLater(() -> wrapped.statusError(exception));
+  }
+
+  @Override
+  public void statusNotice(String message) {
+    EventQueue.invokeLater(() -> wrapped.statusNotice(message));
+  }
+
+  @Override
+  public void startIndeterminate() {
+    EventQueue.invokeLater(() -> wrapped.startIndeterminate());
+  }
+
+  @Override
+  public void stopIndeterminate() {
+    EventQueue.invokeLater(() -> wrapped.stopIndeterminate());
+  }
+
+  @Override
+  public void statusHalt() {
+    EventQueue.invokeLater(() -> wrapped.statusHalt());
+  }
+
+  @Override
+  public boolean isHalted() {
+    return wrapped.isHalted();
+  }
+}
+

app/src/processing/app/Sketch.java

@@ -91,6 +91,8 @@ public class Sketch {
   /** Moved out of Editor and into here for cleaner access. */
   private boolean untitled;
 
+  /** true if we've posted a "sketch disappeared" warning */
+  private boolean disappearedWarning;
 
   /**
    * Used by the command-line version to create a sketch object.
@@ -123,6 +125,7 @@ protected void load(String path) {
     int suffixLength = mode.getDefaultExtension().length() + 1;
     name = mainFilename.substring(0, mainFilename.length() - suffixLength);
     folder = new File(new File(path).getParent());
+    disappearedWarning = false;
     load();
   }
 
@@ -1197,6 +1200,7 @@ protected void updateInternal(String sketchName, File sketchFolder) {
 
     name = sketchName;
     folder = sketchFolder;
+    disappearedWarning = false;
     codeFolder = new File(folder, "code");
     dataFolder = new File(folder, "data");
 
@@ -1498,28 +1502,34 @@ public void prepareBuild(File targetFolder) throws SketchException {
 
 
   /**
-   * Make sure the sketch hasn't been moved or deleted by some
-   * nefarious user. If they did, try to re-create it and save.
-   * Only checks to see if the main folder is still around,
-   * but not its contents.
+   * Make sure the sketch hasn't been moved or deleted by a nefarious user.
+   * If they did, try to re-create it and save. Only checks whether the
+   * main folder is still around, but not its contents.
    */
   public void ensureExistence() {
     if (!folder.exists()) {
-      // Disaster recovery, try to salvage what's there already.
-      Messages.showWarning(Language.text("ensure_exist.messages.missing_sketch"),
-                           Language.text("ensure_exist.messages.missing_sketch.description"));
-      try {
-        folder.mkdirs();
-        modified = true;
+      // Avoid an infinite loop if we've already warned about this
+      // https://github.com/processing/processing/issues/4805
+      if (!disappearedWarning) {
+        disappearedWarning = true;
+
+        // Disaster recovery, try to salvage what's there already.
+        Messages.showWarning(Language.text("ensure_exist.messages.missing_sketch"),
+                             Language.text("ensure_exist.messages.missing_sketch.description"));
+        try {
+          folder.mkdirs();
+          modified = true;
+
+          for (int i = 0; i < codeCount; i++) {
+            code[i].save();  // this will force a save
+          }
+          calcModified();
 
-        for (int i = 0; i < codeCount; i++) {
-          code[i].save();  // this will force a save
+        } catch (Exception e) {
+          // disappearedWarning prevents infinite loop in this scenario
+          Messages.showWarning(Language.text("ensure_exist.messages.unrecoverable"),
+                               Language.text("ensure_exist.messages.unrecoverable.description"), e);
         }
-        calcModified();
-
-      } catch (Exception e) {
-        Messages.showWarning(Language.text("ensure_exist.messages.unrecoverable"),
-                             Language.text("ensure_exist.messages.unrecoverable.description"), e);
       }
     }
   }

app/src/processing/app/SketchException.java

@@ -130,6 +130,11 @@ public void hideStackTrace() {
   }
 
 
+  public boolean isStackTraceEnabled() {
+    return showStackTrace;
+  }
+
+
   /**
    * Nix the java.lang crap out of an exception message
    * because it scares the children.

app/src/processing/app/ui/Editor.java

@@ -320,6 +320,17 @@ public BasicSplitPaneDivider createDefaultDivider() {
         status = new EditorStatus(this, Editor.this);
         return status;
       }
+
+
+      @Override
+      public void finishDraggingTo(int location) {
+        super.finishDraggingTo(location);
+        // JSplitPane issue: if you only make the lower component visible at
+        // the last minute, its minmum size is ignored.
+        if (location > splitPane.getMaximumDividerLocation()) {
+          splitPane.setDividerLocation(splitPane.getMaximumDividerLocation());
+        }
+      }
     });
 
     box.add(splitPane);
@@ -2900,6 +2911,17 @@ public void statusError(Exception e) {
 
     if (e instanceof SketchException) {
       SketchException re = (SketchException) e;
+
+      // Make sure something is printed into the console
+      // Status bar is volatile
+      if (!re.isStackTraceEnabled()) {
+        System.err.println(re.getMessage());
+      }
+
+      // Move the cursor to the line before updating the status bar, otherwise
+      // status message might get hidden by a potential message caused by moving
+      // the cursor to a line with warning in it
+
       if (re.hasCodeIndex()) {
         sketch.setCurrentCode(re.getCodeIndex());
       }