From 795fb841f3846a973c1de99c3921a51f30f2aeb6 Mon Sep 17 00:00:00 2001
From: Jukka Kurkela <jukka.kurkela@gmail.com>
Date: Tue, 23 Feb 2021 19:19:35 +0200
Subject: [PATCH] Fix layout bug when there are no visible boxes

---
 src/core/core.layouts.js                      |   2 +-
 .../core.layouts/no-boxes-all-padding.js      |  39 ++++++++++++++++++
 .../core.layouts/no-boxes-all-padding.png     | Bin 0 -> 709 bytes
 3 files changed, 40 insertions(+), 1 deletion(-)
 create mode 100644 test/fixtures/core.layouts/no-boxes-all-padding.js
 create mode 100644 test/fixtures/core.layouts/no-boxes-all-padding.png

diff --git a/src/core/core.layouts.js b/src/core/core.layouts.js
index acb1b4ce2ec..7868eb67621 100644
--- a/src/core/core.layouts.js
+++ b/src/core/core.layouts.js
@@ -344,7 +344,7 @@ export default {
     //
 
     const visibleVerticalBoxCount = verticalBoxes.reduce((total, wrap) =>
-      wrap.box.options && wrap.box.options.display === false ? total : total + 1, 0);
+      wrap.box.options && wrap.box.options.display === false ? total : total + 1, 0) || 1;
 
     const params = Object.freeze({
       outerWidth: width,
diff --git a/test/fixtures/core.layouts/no-boxes-all-padding.js b/test/fixtures/core.layouts/no-boxes-all-padding.js
new file mode 100644
index 00000000000..ae8500851be
--- /dev/null
+++ b/test/fixtures/core.layouts/no-boxes-all-padding.js
@@ -0,0 +1,39 @@
+module.exports = {
+  config: {
+    type: 'line',
+    data: {
+      labels: [0],
+      datasets: [{
+        data: [0],
+        radius: 16,
+        backgroundColor: 'red'
+      }],
+    },
+    options: {
+      plugins: {
+        legend: false,
+        tooltip: false,
+        title: false,
+        filler: false
+      },
+      scales: {
+        x: {
+          display: false,
+          offset: true
+        },
+        y: {
+          display: false
+        }
+      },
+      layout: {
+        padding: 16
+      }
+    }
+  },
+  options: {
+    canvas: {
+      height: 32,
+      width: 32
+    }
+  }
+};
diff --git a/test/fixtures/core.layouts/no-boxes-all-padding.png b/test/fixtures/core.layouts/no-boxes-all-padding.png
new file mode 100644
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