style: unify identifier naming per updated conventions

Automated with clang-tidy readability-identifier-naming (config added to
.clang-tidy) plus scripted passes, per the updated rules now documented
in CONTRIBUTING.md:

- types (class/struct/enum/alias/template params): PascalCase
- functions, variables, members: snake_case (incl. rational -> Rational)
- private/protected members: trailing underscore; static member
  variables likewise (instance_, available_themes_)
- constants and enum values: snake_case (kLinear -> k_linear,
  F32P -> f32p); ALL_CAPS reserved for macros
- macros: OAK_ prefix (OLIVE_ADD_TEST/OLIVE_ASSERT/OLIVE_CONFIG ->
  OAK_ADD_TEST/OAK_ASSERT/OAK_CONFIG, GL_PREAMBLE -> OAK_GL_PREAMBLE,
  include guards -> OAK_*)
- file names: all lowercase (Current/Plugin/OliveHost/OliveClip/
  OlivePluginInstance -> current/plugin/olivehost/oliveclip/
  oliveplugininstance)
- getters share the member name sans underscore, setters set_foo()
- Qt and third-party (OpenFX) virtual overrides and framework callbacks
  keep their original names (exempt in .clang-tidy)

Manual follow-ups required where automation could not reach:
- string-based QMetaObject/SIGNAL/SLOT references updated to renamed
  methods (AddTask, CreatedFile, DeleteSpecificFile, moveSelectionUp, ...)
- macro bodies referencing renamed methods (OLIVE_CONFIG,
  NODE_DEFAULT_DESTRUCTOR, MANAGEDDISPLAYWIDGET_*)
- self-shadowing locals renamed where signals/methods became same-named
  (size_changed, worker_count, selected_items, import param, filters)
- third_party OFX member/namespace usages restored (OFX::Host::*,
  _created, _clipPrefsDirty, createInstance, clearPersistentMessage)
- STL protocol aliases restored (const_iterator) with .clang-tidy
  ignore rules; qHash overloads restored

Full build and test suite pass: ctest 4/4, ~1960 gtest cases green.

app/widget/nodetableview/nodetableview.cpp

@@ -37,27 +37,27 @@ NodeTableView::NodeTableView(QWidget *parent)
 					  tr("A/W") });
 }
 
-void NodeTableView::SelectNodes(const QVector<Node *> &nodes)
+void NodeTableView::select_nodes(const QVector<Node *> &nodes)
 {
 	foreach (Node *n, nodes) {
 		QTreeWidgetItem *top_item = new QTreeWidgetItem();
-		top_item->setText(0, n->GetLabelAndName());
+		top_item->setText(0, n->get_label_and_name());
 		top_item->setFirstColumnSpanned(true);
 		this->addTopLevelItem(top_item);
 		top_level_item_map_.insert(n, top_item);
 	}
 
-	SetTime(last_time_);
+	set_time(last_time_);
 }
 
-void NodeTableView::DeselectNodes(const QVector<Node *> &nodes)
+void NodeTableView::deselect_nodes(const QVector<Node *> &nodes)
 {
 	foreach (Node *n, nodes) {
 		delete top_level_item_map_.take(n);
 	}
 }
 
-void NodeTableView::SetTime(const rational &time)
+void NodeTableView::set_time(const Rational &time)
 {
 	last_time_ = time;
 
@@ -70,7 +70,7 @@ void NodeTableView::SetTime(const rational &time)
 
 		// Generate a value database for this node at this time
 		NodeValueDatabase db =
-			traverser.GenerateDatabase(node, TimeRange(time, time));
+			traverser.generate_database(node, TimeRange(time, time));
 
 		// Delete any children of this item that aren't in this database
 		for (int j = 0; j < item->childCount(); j++) {
@@ -85,7 +85,7 @@ void NodeTableView::SetTime(const rational &time)
 		for (auto l = db.begin(); l != db.end(); l++) {
 			const NodeValueTable &table = l.value();
 
-			if (!node->HasInputWithID(l.key())) {
+			if (!node->has_input_with_id(l.key())) {
 				// Filters out table entries that aren't inputs (like "global")
 				continue;
 			}
@@ -103,49 +103,49 @@ void NodeTableView::SetTime(const rational &time)
 
 			if (!input_item) {
 				input_item = new QTreeWidgetItem();
-				input_item->setText(0, node->GetInputName(l.key()));
+				input_item->setText(0, node->get_input_name(l.key()));
 				input_item->setData(0, Qt::UserRole, l.key());
 				input_item->setFirstColumnSpanned(true);
 				item->addChild(input_item);
 			}
 
 			// Create children if necessary
-			while (input_item->childCount() < table.Count()) {
+			while (input_item->childCount() < table.count()) {
 				input_item->addChild(new QTreeWidgetItem());
 			}
 
 			// Remove children if necessary
-			while (input_item->childCount() > table.Count()) {
+			while (input_item->childCount() > table.count()) {
 				delete input_item->takeChild(input_item->childCount() - 1);
 			}
 
-			for (int j = 0; j < table.Count(); j++) {
-				const NodeValue &value = table.at(table.Count() - 1 - j);
+			for (int j = 0; j < table.count(); j++) {
+				const NodeValue &value = table.at(table.count() - 1 - j);
 
 				// Create item
 				QTreeWidgetItem *sub_item = input_item->child(j);
 
 				// Set data type name
 				sub_item->setText(
-					0, NodeValue::GetPrettyDataTypeName(value.type()));
+					0, NodeValue::get_pretty_data_type_name(value.type()));
 
 				// Determine source
 				QString source_name;
 				if (value.source()) {
-					source_name = value.source()->GetLabelAndName();
+					source_name = value.source()->get_label_and_name();
 				} else {
 					source_name = tr("(unknown)");
 				}
 				sub_item->setText(1, source_name);
 
 				switch (value.type()) {
-				case NodeValue::kVideoParams:
-				case NodeValue::kAudioParams:
+				case NodeValue::k_video_params:
+				case NodeValue::k_audio_params:
 					// These types have no string representation
 					break;
-				case NodeValue::kTexture: {
+				case NodeValue::k_texture: {
 					// NodeTraverser puts video params in here
-					for (int k = 0; k < VideoParams::kRGBAChannelCount; k++) {
+					for (int k = 0; k < VideoParams::k_rgba_channel_count; k++) {
 						this->setItemWidget(sub_item, 2 + k, new QCheckBox());
 					}
 					break;
@@ -153,7 +153,7 @@ void NodeTableView::SetTime(const rational &time)
 				default: {
 					QVector<QVariant> split_values = value.to_split_value();
 					for (int k = 0; k < split_values.size(); k++) {
-						sub_item->setText(2 + k, NodeValue::ValueToString(
+						sub_item->setText(2 + k, NodeValue::value_to_string(
 													 value.type(),
 													 split_values.at(k), true));
 					}