[studio] Add acceptsClipboardPayload to Editor

deps/nostalgia/src/olympic/studio/modlib/include/studio/context.hpp

@@ -22,4 +22,9 @@ struct StudioContext {
 		ui(pUi), tctx(pTctx) {}
 };
 
+[[nodiscard]]
+constexpr keel::Context &keelCtx(StudioContext &ctx) noexcept {
+	return keelCtx(ctx.tctx);
+}
+
 }

deps/nostalgia/src/olympic/studio/modlib/include/studio/editor.hpp

@@ -43,6 +43,9 @@ class BaseEditor: public Widget {
 
 		virtual void paste();
 
+		[[nodiscard]]
+		virtual bool acceptsClipboardPayload() const noexcept;
+
 		virtual void exportFile();
 
 		virtual void keyStateChanged(turbine::Key key, bool down);

deps/nostalgia/src/olympic/studio/modlib/src/editor.cpp

@@ -23,6 +23,10 @@ void BaseEditor::copy() {
 void BaseEditor::paste() {
 }
 
+bool BaseEditor::acceptsClipboardPayload() const noexcept {
+	return {};
+}
+
 void BaseEditor::exportFile() {
 }
 
@@ -95,7 +99,7 @@ void BaseEditor::setPasteEnabled(bool v) {
 }
 
 bool BaseEditor::pasteEnabled() const noexcept {
-	return m_pasteEnabled;
+	return m_pasteEnabled && acceptsClipboardPayload();
 }
 
 ox::Error BaseEditor::saveItem() noexcept {