Support for rendering schematics (#57)

* Start adding support to render schematics

* Fix bit size error with litematica and improve errors

* Add supprt for world edit schematics

* Parse block entity NBT from schematics

* Fix XZ order of schem files

* Update deepslate, skip invisible blocks on large structures

* Disable invisible blocks toggle for large structures

* Make schematics fully readonly

* Schem order is YZX

* Support schem files with a pallet larger than 127

Author: misode

package-lock.json

@@ -66,7 +66,7 @@
 		"lint": "eslint . --ext .ts"
 	},
 	"dependencies": {
-		"deepslate": "^0.18.1",
+		"deepslate": "^0.18.2",
 		"env-paths": "^2.2.1",
 		"follow-redirects": "^1.14.8",
 		"gl-matrix": "^3.4.3",

package.json

@@ -368,6 +368,11 @@ span.nbt-value {
 	display: none;
 }
 
+.btn.unavailable {
+	cursor: unset;
+	background-color: var(--vscode-button-secondaryBackground);	
+}
+
 .btn:not(:last-child) {
 	margin-right: 5px;
 }

res/editor.css

@@ -93,6 +93,11 @@ export class NbtDocument extends Disposable implements vscode.CustomDocument {
 		if (file instanceof NbtRegion) {
 			const firstChunk = file.getFirstChunk()
 			return firstChunk?.getRoot().getNumber('DataVersion') ?? 0
+		} else if (file.root.has('Blocks') && file.root.has('Data')) {
+			// schematic files don't have DataVersion
+			// should be 1.12 but mcmeta doesn't have that, so using 1.14
+			// TODO: handle {Materials:"Pocket"} differently
+			return 1952
 		} else {
 			return file.root.getNumber('DataVersion') ?? 0
 		}
@@ -143,10 +148,17 @@ export class NbtDocument extends Disposable implements vscode.CustomDocument {
 	}
 
 	private isStructureData() {
-		if (this._documentData instanceof NbtRegion) return false
+		if (this._documentData instanceof NbtRegion) {
+			return false // region file
+		}
+		if (this.uri.fsPath.endsWith('.schem') || this.uri.fsPath.endsWith('.schematic') || this.uri.fsPath.endsWith('.litematic')) {
+			return true // schematic
+		}
 		const root = this._documentData.root
-		return root.hasList('size', NbtType.Int, 3)
-			&& root.hasList('blocks') && root.hasList('palette')
+		if (root.hasList('size', NbtType.Int, 3) && root.hasList('blocks') && root.hasList('palette')) {
+			return true // vanilla structure
+		}
+		return false // anything else
 	}
 
 	private isMapData() {