From a23afe3d901179c7ca5c5f5b9a00431aed2d1089 Mon Sep 17 00:00:00 2001
From: "Eevee (Evelyn Woods)" <eevee.git@veekun.com>
Date: Tue, 8 Dec 2020 18:58:59 -0700
Subject: [PATCH] Editor: Disallow erasing the floor (!)

---
 js/main-editor.js | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/js/main-editor.js b/js/main-editor.js
index 5602e50..5c05d7b 100644
--- a/js/main-editor.js
+++ b/js/main-editor.js
@@ -424,11 +424,16 @@ class PencilOperation extends DrawOperation {
             else if (template) {
                 // Erase whatever's on the same layer
                 // TODO this seems like the wrong place for this
+                let layer = template.type.draw_layer;
                 for (let i = cell.length - 1; i >= 0; i--) {
-                    if (cell[i].type.draw_layer === template.type.draw_layer) {
+                    if (cell[i].type.draw_layer === layer) {
                         cell.splice(i, 1);
                     }
                 }
+                // Don't allow erasing the floor entirely
+                if (layer === 0) {
+                    cell.unshift({type: TILE_TYPES.floor});
+                }
                 this.editor.mark_cell_dirty(cell);
             }
         }
@@ -2007,6 +2012,7 @@ export class Editor extends PrimaryView {
         // Replace whatever's on the same layer
         // TODO probably not the best heuristic yet, since i imagine you can
         // combine e.g. the tent with thin walls
+        // TODO should preserve wiring if possible too
         for (let i = cell.length - 1; i >= 0; i--) {
             if (cell[i].type.draw_layer === tile.type.draw_layer) {
                 cell.splice(i, 1);