From 2a92cf977ee2ae37d8302a294c6338fa51a5ca45 Mon Sep 17 00:00:00 2001
From: Kevin Lamonte <kevin.lamonte@gmail.com>
Date: Sat, 2 Mar 2019 05:40:42 -0600
Subject: [PATCH] #38 fix Swing deadlock

---
 src/jexer/backend/SwingComponent.java | 42 ++++++++++++++++++++-------
 src/jexer/backend/SwingTerminal.java  |  6 ++++
 2 files changed, 38 insertions(+), 10 deletions(-)

diff --git a/src/jexer/backend/SwingComponent.java b/src/jexer/backend/SwingComponent.java
index 92fd1d89..23b50ab3 100644
--- a/src/jexer/backend/SwingComponent.java
+++ b/src/jexer/backend/SwingComponent.java
@@ -45,6 +45,7 @@ import java.awt.image.BufferedImage;
 import java.awt.image.BufferStrategy;
 import javax.swing.JComponent;
 import javax.swing.JFrame;
+import javax.swing.SwingUtilities;
 
 /**
  * Wrapper for integrating with Swing, because JFrame and JComponent have
@@ -363,17 +364,38 @@ class SwingComponent {
      * @param height the new height in pixels
      */
     public void setDimensions(final int width, final int height) {
-        // Figure out the thickness of borders and use that to set the final
-        // size.
-        if (frame != null) {
-            Insets insets = getInsets();
-            frame.setSize(width + insets.left + insets.right,
-                height + insets.top + insets.bottom);
-        } else {
-            Insets insets = getInsets();
-            component.setSize(width + insets.left + insets.right,
-                height + insets.top + insets.bottom);
+        if (SwingUtilities.isEventDispatchThread()) {
+            // We are in the Swing thread and can safely set the size.
+
+            // Figure out the thickness of borders and use that to set the
+            // final size.
+            if (frame != null) {
+                Insets insets = getInsets();
+                frame.setSize(width + insets.left + insets.right,
+                    height + insets.top + insets.bottom);
+            } else {
+                Insets insets = getInsets();
+                component.setSize(width + insets.left + insets.right,
+                    height + insets.top + insets.bottom);
+            }
+            return;
         }
+
+        SwingUtilities.invokeLater(new Runnable() {
+            public void run() {
+                // Figure out the thickness of borders and use that to set
+                // the final size.
+                if (frame != null) {
+                    Insets insets = getInsets();
+                    frame.setSize(width + insets.left + insets.right,
+                        height + insets.top + insets.bottom);
+                } else {
+                    Insets insets = getInsets();
+                    component.setSize(width + insets.left + insets.right,
+                        height + insets.top + insets.bottom);
+                }
+            }
+        });
     }
 
     /**
diff --git a/src/jexer/backend/SwingTerminal.java b/src/jexer/backend/SwingTerminal.java
index 43afc161..67211a6c 100644
--- a/src/jexer/backend/SwingTerminal.java
+++ b/src/jexer/backend/SwingTerminal.java
@@ -1935,6 +1935,12 @@ public class SwingTerminal extends LogicalScreen
             return;
         }
 
+        if (sessionInfo == null) {
+            // This is the initial component resize in construction, bail
+            // out.
+            return;
+        }
+
         // Drop a new TResizeEvent into the queue
         sessionInfo.queryWindowSize();
         synchronized (eventQueue) {
-- 
2.27.0