diff --git a/include/mainwindow.h b/include/mainwindow.h
index 66c459d8..ed31a4b0 100644
--- a/include/mainwindow.h
+++ b/include/mainwindow.h
@@ -97,6 +97,10 @@ public:
     Q_INVOKABLE QJSValue getPrimaryTilesetPalettesPreview();
     Q_INVOKABLE QJSValue getSecondaryTilesetPalettePreview(int paletteIndex);
     Q_INVOKABLE QJSValue getSecondaryTilesetPalettesPreview();
+    Q_INVOKABLE int getNumPrimaryTilesetMetatiles();
+    Q_INVOKABLE int getNumSecondaryTilesetMetatiles();
+    Q_INVOKABLE bool isPrimaryTileset(QString tilesetName);
+    Q_INVOKABLE bool isSecondaryTileset(QString tilesetName);
     Q_INVOKABLE QString getPrimaryTileset();
     Q_INVOKABLE QString getSecondaryTileset();
     Q_INVOKABLE void setPrimaryTileset(QString tileset);
@@ -128,6 +132,7 @@ public:
     Q_INVOKABLE void setMetatileTerrainType(int metatileId, int terrainType);
     Q_INVOKABLE int getMetatileBehavior(int metatileId);
     Q_INVOKABLE void setMetatileBehavior(int metatileId, int behavior);
+    Q_INVOKABLE int getNumTilesInMetatile();
     Q_INVOKABLE QJSValue getMetatileTile(int metatileId, int tileIndex);
     Q_INVOKABLE void setMetatileTile(int metatileId, int tileIndex, int tileId, bool xflip, bool yflip, int palette, bool forceRedraw = true);
     Q_INVOKABLE void setMetatileTile(int metatileId, int tileIndex, QJSValue tileObj, bool forceRedraw = true);
diff --git a/src/mainwindow_scriptapi.cpp b/src/mainwindow_scriptapi.cpp
index a8dab935..31a05574 100644
--- a/src/mainwindow_scriptapi.cpp
+++ b/src/mainwindow_scriptapi.cpp
@@ -470,6 +470,30 @@ QJSValue MainWindow::getSecondaryTilesetPalettesPreview() {
     return this->getTilesetPalettes(this->editor->map->layout->tileset_secondary->palettePreviews);
 }
 
+int MainWindow::getNumPrimaryTilesetMetatiles() {
+    if (!this->editor || !this->editor->map || !this->editor->map->layout || !this->editor->map->layout->tileset_primary)
+        return 0;
+    return this->editor->map->layout->tileset_primary->metatiles.length();
+}
+
+int MainWindow::getNumSecondaryTilesetMetatiles() {
+    if (!this->editor || !this->editor->map || !this->editor->map->layout || !this->editor->map->layout->tileset_secondary)
+        return 0;
+    return this->editor->map->layout->tileset_secondary->metatiles.length();
+}
+
+bool MainWindow::isPrimaryTileset(QString tilesetName) {
+    if (!this->editor || !this->editor->project)
+        return false;
+    return this->editor->project->tilesetLabels["primary"].contains(tilesetName);
+}
+
+bool MainWindow::isSecondaryTileset(QString tilesetName) {
+    if (!this->editor || !this->editor->project)
+        return false;
+    return this->editor->project->tilesetLabels["secondary"].contains(tilesetName);
+}
+
 QString MainWindow::getPrimaryTileset() {
     if (!this->editor || !this->editor->map || !this->editor->map->layout || !this->editor->map->layout->tileset_primary)
         return QString();
@@ -697,8 +721,12 @@ void MainWindow::setMetatileBehavior(int metatileId, int behavior) {
     this->saveMetatileAttributesByMetatileId(metatileId);
 }
 
+int MainWindow::getNumTilesInMetatile() {
+    return projectConfig.getTripleLayerMetatilesEnabled() ? 12 : 8;
+}
+
 int MainWindow::calculateTileBounds(int * tileStart, int * tileEnd) {
-    int maxNumTiles = projectConfig.getTripleLayerMetatilesEnabled() ? 12 : 8;
+    int maxNumTiles = this->getNumTilesInMetatile();
     if (*tileEnd >= maxNumTiles || *tileEnd < 0)
         *tileEnd = maxNumTiles - 1;
     if (*tileStart >= maxNumTiles || *tileStart < 0)