diff --git a/docsrc/manual/scripting-capabilities.rst b/docsrc/manual/scripting-capabilities.rst
index fe47f67f..b645f49a 100644
--- a/docsrc/manual/scripting-capabilities.rst
+++ b/docsrc/manual/scripting-capabilities.rst
@@ -153,9 +153,9 @@ Callbacks
 
 .. js:function:: onMapOpened(mapName)
 
-   Called when a map is opened.
+   Called when a map or layout is opened.
 
-   :param mapName: the name of the opened map
+   :param mapName: the name of the opened map or layout
    :type mapName: string
 
 .. js:function:: onBlockChanged(x, y, prevBlock, newBlock)
@@ -1995,7 +1995,28 @@ All utility functions are callable via the global ``utility`` object.
 
    Gets the list of map names.
 
-   :returns: the list of map names
+   :returns: the list of map names (e.g. `PetalburgCity`)
+   :rtype: array
+
+.. js:function:: utility.getMapConstants()
+
+   Gets the list of map IDs (e.g. `MAP_PETALBURG_CITY`)
+
+   :returns: the list of map IDs
+   :rtype: array
+
+.. js:function:: utility.getLayoutNames()
+
+   Gets the list of layout names.
+
+   :returns: the list of layout names (e.g. `PetalburgCity_Layout`)
+   :rtype: array
+
+.. js:function:: utility.getLayoutConstants()
+
+   Gets the list of layout IDs (e.g. `LAYOUT_PETALBURG_CITY`)
+
+   :returns: the list of layout IDs
    :rtype: array
 
 .. js:function:: utility.getTilesetNames()
diff --git a/include/scriptutility.h b/include/scriptutility.h
index 0d6fca75..78272eec 100644
--- a/include/scriptutility.h
+++ b/include/scriptutility.h
@@ -42,6 +42,9 @@ public:
     Q_INVOKABLE QList<float> getMetatileLayerOpacity();
     Q_INVOKABLE void setMetatileLayerOpacity(QList<float> order);
     Q_INVOKABLE QList<QString> getMapNames();
+    Q_INVOKABLE QList<QString> getMapConstants();
+    Q_INVOKABLE QList<QString> getLayoutNames();
+    Q_INVOKABLE QList<QString> getLayoutConstants();
     Q_INVOKABLE QList<QString> getTilesetNames();
     Q_INVOKABLE QList<QString> getPrimaryTilesetNames();
     Q_INVOKABLE QList<QString> getSecondaryTilesetNames();
diff --git a/src/mainwindow.cpp b/src/mainwindow.cpp
index 74f579c9..23dbbae7 100644
--- a/src/mainwindow.cpp
+++ b/src/mainwindow.cpp
@@ -947,6 +947,7 @@ bool MainWindow::setLayout(QString layoutId) {
 
     connect(editor->layout, &Layout::needsRedrawing, this, &MainWindow::redrawMapScene, Qt::UniqueConnection);
 
+    Scripting::cb_MapOpened(layout->name);
     updateTilesetEditor();
 
     userConfig.recentMapOrLayout = layoutId;
@@ -2815,8 +2816,15 @@ void MainWindow::reloadScriptEngine() {
     Scripting::populateGlobalObject(this);
     // Lying to the scripts here, simulating a project reload
     Scripting::cb_ProjectOpened(projectConfig.projectDir);
-    if (editor && editor->map)
-        Scripting::cb_MapOpened(editor->map->name()); // TODO: API should have equivalent for layout
+    if (this->editor) {
+        QString curName;
+        if (this->editor->map)
+            curName = this->editor->map->name();
+        else if (editor->layout)
+            curName = this->editor->layout->name;
+
+        Scripting::cb_MapOpened(curName);
+    }
 }
 
 void MainWindow::on_horizontalSlider_MetatileZoom_valueChanged(int value) {
diff --git a/src/scriptapi/apimap.cpp b/src/scriptapi/apimap.cpp
index 2532f132..0ee3316e 100644
--- a/src/scriptapi/apimap.cpp
+++ b/src/scriptapi/apimap.cpp
@@ -794,7 +794,7 @@ void MainWindow::setMetatileTile(int metatileId, int tileIndex, QJSValue tileObj
 }
 
 QJSValue MainWindow::getTilePixels(int tileId) {
-    if (tileId < 0 || !this->editor || !this->editor->project || !this->editor->map || !this->editor->layout)
+    if (tileId < 0 || !this->editor || !this->editor->layout)
         return QJSValue();
     QImage tileImage = getTileImage(tileId, this->editor->layout->tileset_primary, this->editor->layout->tileset_secondary);
     if (tileImage.isNull() || tileImage.sizeInBytes() < 64)
diff --git a/src/scriptapi/apiutility.cpp b/src/scriptapi/apiutility.cpp
index e5cebc54..5d2072a9 100644
--- a/src/scriptapi/apiutility.cpp
+++ b/src/scriptapi/apiutility.cpp
@@ -249,6 +249,27 @@ QList<QString> ScriptUtility::getMapNames() {
     return window->editor->project->mapNames;
 }
 
+QList<QString> ScriptUtility::getMapConstants() {
+    if (!window || !window->editor || !window->editor->project)
+        return QList<QString>();
+    return window->editor->project->mapConstantsToMapNames.keys();
+}
+
+QList<QString> ScriptUtility::getLayoutNames() {
+    QList<QString> names;
+    if (!window || !window->editor || !window->editor->project)
+        return names;
+    for (const auto &layout : window->editor->project->mapLayouts)
+        names.append(layout->name);
+    return names;
+}
+
+QList<QString> ScriptUtility::getLayoutConstants() {
+    if (!window || !window->editor || !window->editor->project)
+        return QList<QString>();
+    return window->editor->project->layoutIds;
+}
+
 QList<QString> ScriptUtility::getTilesetNames() {
     if (!window || !window->editor || !window->editor->project)
         return QList<QString>();