From 38e2b9d3ca2795a07a900c2c9cb9c50f88b24af1 Mon Sep 17 00:00:00 2001
From: Sam El-Husseini <sam.elhusseini@gmail.com>
Date: Sun, 15 Dec 2019 02:34:58 -0800
Subject: [PATCH] [zelos] Statement input centreline (#3513)

* Make statement inputs in zelos use the top row centreline.
---
 core/renderers/zelos/constants.js |  5 +++++
 core/renderers/zelos/info.js      | 11 +++++++++++
 2 files changed, 16 insertions(+)

diff --git a/core/renderers/zelos/constants.js b/core/renderers/zelos/constants.js
index 949f990fc..db4c2bc8c 100644
--- a/core/renderers/zelos/constants.js
+++ b/core/renderers/zelos/constants.js
@@ -96,6 +96,11 @@ Blockly.zelos.ConstantProvider = function() {
    */
   this.MIN_BLOCK_HEIGHT = 12 * this.GRID_UNIT;
 
+  /**
+   * @override
+   */
+  this.EMPTY_STATEMENT_INPUT_HEIGHT = 6 * this.GRID_UNIT;
+
   /**
    * @override
    */
diff --git a/core/renderers/zelos/info.js b/core/renderers/zelos/info.js
index 580fc3fe2..aea66f2cc 100644
--- a/core/renderers/zelos/info.js
+++ b/core/renderers/zelos/info.js
@@ -221,6 +221,17 @@ Blockly.zelos.RenderInfo.prototype.getSpacerRowWidth_ = function(prev, next) {
   return width;
 };
 
+/**
+ * @override
+ */
+Blockly.zelos.RenderInfo.prototype.getElemCenterline_ = function(row, elem) {
+  if (row.hasStatement) {
+    return row.yPos + this.constants_.EMPTY_STATEMENT_INPUT_HEIGHT / 2;
+  }
+  return Blockly.zelos.RenderInfo.superClass_.getElemCenterline_.call(this,
+      row, elem);
+};
+
 /**
  * Adjust the x position of fields to bump all non-label fields in the first row
  * past the notch position.  This must be called before ``computeBounds`` is