[studio] Add acceptsClipboardPayload to Editor

src/olympic/studio/applib/src/studioapp.cpp

@@ -209,7 +209,7 @@ void StudioUI::drawMenu() noexcept {
 			if (ImGui::MenuItem("Cut", "Ctrl+X", false, m_activeEditor && m_activeEditor->cutEnabled())) {
 				m_activeEditor->cut();
 			}
-			if (ImGui::MenuItem("Paste", "Ctrl+V", false, m_activeEditor && m_activeEditor->pasteEnabled()) && m_activeEditor) {
+			if (ImGui::MenuItem("Paste", "Ctrl+V", false, m_activeEditor && m_activeEditor->pasteEnabled())) {
 				m_activeEditor->paste();
 			}
 			ImGui::EndMenu();

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);
+}
+
 }

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);

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 {