UnityEventCSharpMethodLineMarkerProvider.java

/*
 * Copyright 2013-2016 consulo.io
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package consulo.unity3d.csharp.codeInsight;

import java.util.Map;

import javax.swing.Icon;

import org.jetbrains.annotations.NotNull;
import org.jetbrains.annotations.Nullable;
import com.intellij.codeHighlighting.Pass;
import com.intellij.codeInsight.daemon.LineMarkerInfo;
import com.intellij.codeInsight.daemon.LineMarkerProviderDescriptor;
import com.intellij.openapi.editor.markup.GutterIconRenderer;
import com.intellij.openapi.module.ModuleUtilCore;
import com.intellij.psi.PsiElement;
import com.intellij.util.ConstantFunction;
import consulo.annotations.RequiredReadAction;
import consulo.csharp.ide.lineMarkerProvider.CSharpLineMarkerUtil;
import consulo.csharp.lang.psi.CSharpMethodDeclaration;
import consulo.csharp.lang.psi.CSharpTypeDeclaration;
import consulo.csharp.lang.psi.impl.CSharpTypeUtil;
import consulo.dotnet.psi.DotNetInheritUtil;
import consulo.dotnet.psi.DotNetParameter;
import consulo.dotnet.psi.DotNetParameterListOwner;
import consulo.dotnet.psi.DotNetTypeDeclaration;
import consulo.dotnet.resolve.DotNetTypeRef;
import consulo.unity3d.Unity3dIcons;
import consulo.unity3d.csharp.UnityFunctionManager;
import consulo.unity3d.module.Unity3dModuleExtension;

/**
 * @author VISTALL
 * @since 19.12.14
 */
public class UnityEventCSharpMethodLineMarkerProvider extends LineMarkerProviderDescriptor
{
	@Nullable
	@Override
	public String getName()
	{
		return "Unity C# Event Method";
	}

	@Nullable
	@Override
	public Icon getIcon()
	{
		return Unity3dIcons.EventMethod;
	}

	@RequiredReadAction
	@Nullable
	@Override
	public LineMarkerInfo getLineMarkerInfo(@NotNull PsiElement element)
	{
		return createMarker(element);
	}

	@Nullable
	@RequiredReadAction
	private static LineMarkerInfo createMarker(final PsiElement element)
	{
		CSharpMethodDeclaration methodDeclaration = CSharpLineMarkerUtil.getNameIdentifierAs(element, CSharpMethodDeclaration.class);
		if(methodDeclaration != null)
		{
			Unity3dModuleExtension extension = ModuleUtilCore.getExtension(element, Unity3dModuleExtension.class);
			if(extension == null)
			{
				return null;
			}

			PsiElement maybeTypeDeclaration = methodDeclaration.getParent();
			if(maybeTypeDeclaration instanceof CSharpTypeDeclaration)
			{
				UnityFunctionManager functionManager = UnityFunctionManager.getInstance();
				for(Map.Entry<String, Map<String, UnityFunctionManager.FunctionInfo>> entry : functionManager.getFunctionsByType().entrySet())
				{
					UnityFunctionManager.FunctionInfo functionInfo = entry.getValue().get(element.getText());
					if(functionInfo == null)
					{
						continue;
					}

					String typeName = entry.getKey();
					if(DotNetInheritUtil.isParent(typeName, (DotNetTypeDeclaration) maybeTypeDeclaration, true))
					{
						if(!isEqualParameters(functionInfo.getParameters(), methodDeclaration))
						{
							return null;
						}

						return new LineMarkerInfo<>(element, element.getTextRange(), Unity3dIcons.EventMethod, Pass.LINE_MARKERS, new ConstantFunction<>(functionInfo.getDescription()), null,
								GutterIconRenderer.Alignment.LEFT);
					}
				}
			}
		}

		return null;
	}

	@RequiredReadAction
	private static boolean isEqualParameters(Map<String, String> funcParameters, DotNetParameterListOwner parameterListOwner)
	{
		DotNetParameter[] parameters = parameterListOwner.getParameters();
		if(parameters.length == 0)
		{
			return true;
		}
		if(parameters.length != funcParameters.size())
		{
			return false;
		}

		int i = 0;
		for(String expectedType : funcParameters.values())
		{
			DotNetParameter parameter = parameters[i++];

			DotNetTypeRef typeRef = UnityFunctionManager.createTypeRef(parameter, expectedType);
			if(!CSharpTypeUtil.isTypeEqual(parameter.toTypeRef(true), typeRef, parameter))
			{
				return false;
			}
		}
		return true;
	}
}