1 files changed, 254 insertions, 0 deletions
diff --git a/src/core/parser/stack/Handler.cpp b/src/core/parser/stack/Handler.cpp
new file mode 100644
index 0000000..bf5d4ea
--- /dev/null
+++ b/src/core/parser/stack/Handler.cpp
@@ -0,0 +1,254 @@
+/*
+    Ousía
+    Copyright (C) 2014, 2015  Benjamin Paaßen, Andreas Stöckel
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#include <core/common/Exceptions.hpp>
+#include <core/common/Logger.hpp>
+#include <core/parser/ParserContext.hpp>
+
+#include "Callbacks.hpp"
+#include "Handler.hpp"
+#include "State.hpp"
+
+namespace ousia {
+namespace parser_stack {
+
+/* Class HandlerData */
+
+HandlerData::HandlerData(ParserContext &ctx, /*Callbacks &callbacks,*/
+                         const std::string &name, const State &state,
+                         const SourceLocation &location)
+    : ctx(ctx),
+      /*callbacks(callbacks),*/
+      name(name),
+      state(state),
+      location(location)
+{
+}
+
+/* Class Handler */
+
+Handler::Handler(const HandlerData &handlerData)
+    : handlerData(handlerData), internalLogger(nullptr)
+{
+}
+
+Handler::~Handler() {}
+
+ParserContext &Handler::context() { return handlerData.ctx; }
+
+ParserScope &Handler::scope() { return handlerData.ctx.getScope(); }
+
+Manager &Handler::manager() { return handlerData.ctx.getManager(); }
+
+Logger &Handler::logger()
+{
+	if (internalLogger != nullptr) {
+		return *internalLogger;
+	}
+	return handlerData.ctx.getLogger();
+}
+
+const SourceLocation &Handler::location() const { return handlerData.location; }
+
+const std::string &Handler::name() const { return handlerData.name; }
+
+void Handler::setWhitespaceMode(WhitespaceMode whitespaceMode)
+{
+	/*handlerData.callbacks.setWhitespaceMode(whitespaceMode);*/
+}
+
+void Handler::registerToken(const std::string &token)
+{
+	/*handlerData.callbacks.registerToken(token);*/
+}
+
+void Handler::unregisterToken(const std::string &token)
+{
+	/*handlerData.callbacks.unregisterToken(token);*/
+}
+
+const std::string &Handler::getName() const { return name(); }
+
+const State &Handler::getState() const { return handlerData.state; }
+
+void Handler::setLogger(Logger &logger) { internalLogger = &logger; }
+
+void Handler::resetLogger() { internalLogger = nullptr; }
+
+const SourceLocation &Handler::getLocation() const { return location(); }
+
+/* Class EmptyHandler */
+
+bool EmptyHandler::start(Variant::mapType &args)
+{
+	// Just accept anything
+	return true;
+}
+
+void EmptyHandler::end()
+{
+	// Do nothing if a command ends
+}
+
+bool EmptyHandler::fieldStart(bool &isDefaultField, size_t fieldIndex)
+{
+	// Accept any field
+	return true;
+}
+
+void EmptyHandler::fieldEnd()
+{
+	// Do not handle fields
+}
+
+bool EmptyHandler::annotationStart(const Variant &className,
+                                   Variant::mapType &args)
+{
+	// Accept any data
+	return true;
+}
+
+bool EmptyHandler::annotationEnd(const Variant &className,
+                                 const Variant &elementName)
+{
+	// Accept any annotation
+	return true;
+}
+
+bool EmptyHandler::data(Variant &data)
+{
+	// Support any data
+	return true;
+}
+
+Handler *EmptyHandler::create(const HandlerData &handlerData)
+{
+	return new EmptyHandler(handlerData);
+}
+
+/* Class StaticHandler */
+
+bool StaticHandler::start(Variant::mapType &args)
+{
+	// Do nothing in the default implementation, accept anything
+	return true;
+}
+
+void StaticHandler::end()
+{
+	// Do nothing here
+}
+
+bool StaticHandler::fieldStart(bool &isDefault, size_t fieldIdx)
+{
+	// Return true if either the default field is requested or the field index
+	// is zero. This simulates that there is exactly one field (a default field)
+	if (fieldIdx == 0) {
+		isDefault = true;
+		return true;
+	}
+	return false;
+}
+
+void StaticHandler::fieldEnd()
+{
+	// Do nothing here
+}
+
+bool StaticHandler::annotationStart(const Variant &className,
+                                    Variant::mapType &args)
+{
+	// No annotations supported
+	return false;
+}
+
+bool StaticHandler::annotationEnd(const Variant &className,
+                                  const Variant &elementName)
+{
+	// No annotations supported
+	return false;
+}
+
+bool StaticHandler::data(Variant &data)
+{
+	logger().error("Did not expect any data here", data);
+	return false;
+}
+
+/* Class StaticFieldHandler */
+
+StaticFieldHandler::StaticFieldHandler(const HandlerData &handlerData,
+                                       const std::string &argName)
+    : StaticHandler(handlerData), argName(argName), handled(false)
+{
+}
+
+bool StaticFieldHandler::start(Variant::mapType &args)
+{
+	if (!argName.empty()) {
+		auto it = args.find(argName);
+		if (it != args.end() && !it->second.toString().empty()) {
+			handled = true;
+			doHandle(it->second, args);
+			return true;
+		}
+	}
+
+	this->args = args;
+	return true;
+}
+
+void StaticFieldHandler::end()
+{
+	if (!handled) {
+		if (!argName.empty()) {
+			logger().error(std::string("Required argument \"") + argName +
+			                   std::string("\" is missing."),
+			               location());
+		} else {
+			logger().error("Command requires data, but no data given",
+			               location());
+		}
+	}
+}
+
+bool StaticFieldHandler::data(Variant &data)
+{
+	// Call the doHandle function if this has not been done before
+	if (!handled) {
+		handled = true;
+		doHandle(data, args);
+		return true;
+	}
+
+	// The doHandle function was already called, print an error message
+	logger().error(
+	    std::string("Found data, but the corresponding argument \"") + argName +
+	        std::string("\" was already specified"),
+	    data);
+
+	// Print the location at which the attribute was originally specified
+	auto it = args.find(argName);
+	if (it != args.end()) {
+		logger().note(std::string("Attribute was specified here:"), it->second);
+	}
+	return false;
+}
+}
+}
+