From a202558950ce9b06825447ec79bbe9960f451715 Mon Sep 17 00:00:00 2001
From: Neil Fraser <fraser@google.com>
Date: Wed, 6 Apr 2022 17:22:26 -0700
Subject: [PATCH] feat: Add margin around zoomToFit (#6042)

* Add margin around zoomToFit

* Change configurable property to fixed constant.

* VS Code keeps indenting stuff for no reason.
---
 core/workspace_svg.js | 11 +++++++++--
 1 file changed, 9 insertions(+), 2 deletions(-)

diff --git a/core/workspace_svg.js b/core/workspace_svg.js
index ea632409d..0ec4058d2 100644
--- a/core/workspace_svg.js
+++ b/core/workspace_svg.js
@@ -116,6 +116,12 @@ goog.require('Blockly.MetricsManager');
 goog.require('Blockly.Msg');
 
 
+/**
+ * Margin around the top/bottom/left/right after a zoomToFit call.
+ * @const
+ */
+const ZOOM_TO_FIT_MARGIN = 20;
+
 /**
  * Class for a workspace.  This is an onscreen area with optional trashcan,
  * scrollbars, bubbles, and dragging.
@@ -2168,8 +2174,9 @@ class WorkspaceSvg extends Workspace {
     let workspaceWidth = metrics.viewWidth;
     let workspaceHeight = metrics.viewHeight;
     const blocksBox = this.getBlocksBoundingBox();
-    let blocksWidth = blocksBox.right - blocksBox.left;
-    let blocksHeight = blocksBox.bottom - blocksBox.top;
+    const doubleMargin = ZOOM_TO_FIT_MARGIN * 2;
+    let blocksWidth = blocksBox.right - blocksBox.left + doubleMargin;
+    let blocksHeight = blocksBox.bottom - blocksBox.top + doubleMargin;
     if (!blocksWidth) {
       return;  // Prevents zooming to infinity.
     }