UI: Add duplicate filter

UI/window-basic-filters.cpp

@@ -732,12 +732,18 @@ void OBSBasicFilters::CustomContextMenu(const QPoint &pos, bool async)
 		popup.addMenu(addMenu);
 
 	if (item) {
+		const char *dulpicateSlot =
+			async ? SLOT(DuplicateAsyncFilter())
+			      : SLOT(DuplicateEffectFilter());
+
 		const char *renameSlot = async ? SLOT(RenameAsyncFilter())
 					       : SLOT(RenameEffectFilter());
 		const char *removeSlot =
 			async ? SLOT(on_removeAsyncFilter_clicked())
 			      : SLOT(on_removeEffectFilter_clicked());
 
+		popup.addSeparator();
+		popup.addAction(QTStr("Duplicate"), this, dulpicateSlot);
 		popup.addSeparator();
 		popup.addAction(QTStr("Rename"), this, renameSlot);
 		popup.addAction(QTStr("Remove"), this, removeSlot);
@@ -781,6 +787,58 @@ void OBSBasicFilters::EditItem(QListWidgetItem *item, bool async)
 	editActive = true;
 }
 
+void OBSBasicFilters::DuplicateItem(QListWidgetItem *item)
+{
+	OBSSource filter = item->data(Qt::UserRole).value<OBSSource>();
+	string name = obs_source_get_name(filter);
+	obs_source_t *existing_filter;
+
+	QString placeholder = QString::fromStdString(name);
+	QString text{placeholder};
+	int i = 2;
+	while ((existing_filter = obs_source_get_filter_by_name(
+			source, QT_TO_UTF8(text)))) {
+		obs_source_release(existing_filter);
+		text = QString("%1 %2").arg(placeholder).arg(i++);
+	}
+
+	bool success = NameDialog::AskForName(
+		this, QTStr("Basic.Filters.AddFilter.Title"),
+		QTStr("Basic.Filters.AddFilter.Text"), name, text);
+	if (!success)
+		return;
+
+	if (name.empty()) {
+		OBSMessageBox::warning(this, QTStr("NoNameEntered.Title"),
+				       QTStr("NoNameEntered.Text"));
+		DuplicateItem(item);
+		return;
+	}
+
+	existing_filter = obs_source_get_filter_by_name(source, name.c_str());
+	if (existing_filter) {
+		OBSMessageBox::warning(this, QTStr("NameExists.Title"),
+				       QTStr("NameExists.Text"));
+		obs_source_release(existing_filter);
+		DuplicateItem(item);
+		return;
+	}
+	bool enabled = obs_source_enabled(filter);
+	obs_source_t *new_filter =
+		obs_source_duplicate(filter, name.c_str(), false);
+	if (new_filter) {
+		const char *sourceName = obs_source_get_name(source);
+		const char *id = obs_source_get_id(new_filter);
+		blog(LOG_INFO,
+		     "User duplicated filter '%s' (%s) from '%s' "
+		     "to source '%s'",
+		     name.c_str(), id, name.c_str(), sourceName);
+		obs_source_set_enabled(new_filter, enabled);
+		obs_source_filter_add(source, new_filter);
+		obs_source_release(new_filter);
+	}
+}
+
 void OBSBasicFilters::on_asyncFilters_customContextMenuRequested(
 	const QPoint &pos)
 {
@@ -803,6 +861,16 @@ void OBSBasicFilters::RenameEffectFilter()
 	EditItem(ui->effectFilters->currentItem(), false);
 }
 
+void OBSBasicFilters::DuplicateAsyncFilter()
+{
+	DuplicateItem(ui->asyncFilters->currentItem());
+}
+
+void OBSBasicFilters::DuplicateEffectFilter()
+{
+	DuplicateItem(ui->effectFilters->currentItem());
+}
+
 void OBSBasicFilters::FilterNameEdited(QWidget *editor, QListWidget *list)
 {
 	QListWidgetItem *listItem = list->currentItem();

UI/window-basic-filters.hpp

@@ -67,6 +67,7 @@ private:
 
 	void CustomContextMenu(const QPoint &pos, bool async);
 	void EditItem(QListWidgetItem *item, bool async);
+	void DuplicateItem(QListWidgetItem *item);
 
 	void FilterNameEdited(QWidget *editor, QListWidget *list);
 
@@ -82,6 +83,8 @@ private slots:
 	void ReorderFilters();
 	void RenameAsyncFilter();
 	void RenameEffectFilter();
+	void DuplicateAsyncFilter();
+	void DuplicateEffectFilter();
 	void ResetFilters();
 
 	void AddFilterFromAction();