org.mustbe.consulo.csharp.ide.lineMarkerProvider.LambdaLineMarkerCollector.java Source code

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Here is the source code for org.mustbe.consulo.csharp.ide.lineMarkerProvider.LambdaLineMarkerCollector.java

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/*
 * Copyright 2013-2016 must-be.org
 *
 * 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 org.mustbe.consulo.csharp.ide.lineMarkerProvider;

import java.awt.event.MouseEvent;
import java.util.List;

import javax.swing.Icon;

import org.jetbrains.annotations.NotNull;
import org.jetbrains.annotations.Nullable;
import org.mustbe.consulo.RequiredDispatchThread;
import org.mustbe.consulo.RequiredReadAction;
import org.mustbe.consulo.csharp.lang.psi.CSharpTokens;
import org.mustbe.consulo.csharp.lang.psi.impl.source.CSharpLambdaExpressionImpl;
import org.mustbe.consulo.csharp.lang.psi.impl.source.CSharpLambdaExpressionImplUtil;
import org.mustbe.consulo.csharp.lang.psi.impl.source.resolve.type.CSharpLambdaResolveResult;
import com.intellij.codeHighlighting.Pass;
import com.intellij.codeInsight.daemon.GutterIconNavigationHandler;
import com.intellij.codeInsight.daemon.LineMarkerInfo;
import com.intellij.codeInsight.daemon.MergeableLineMarkerInfo;
import com.intellij.codeInsight.daemon.NavigateAction;
import com.intellij.icons.AllIcons;
import com.intellij.openapi.actionSystem.IdeActions;
import com.intellij.openapi.editor.markup.GutterIconRenderer;
import com.intellij.openapi.util.TextRange;
import com.intellij.pom.Navigatable;
import com.intellij.psi.PsiElement;
import com.intellij.psi.tree.IElementType;
import com.intellij.psi.util.PsiUtilCore;
import com.intellij.util.ConstantFunction;
import com.intellij.util.Consumer;
import com.intellij.util.Function;

/**
 * @author VISTALL
 * @since 01.03.2016
 */
public class LambdaLineMarkerCollector implements LineMarkerCollector {
    public static class MarkerInfo extends MergeableLineMarkerInfo<PsiElement> {
        public MarkerInfo(@NotNull PsiElement element, @NotNull TextRange textRange, Icon icon, int updatePass,
                @Nullable Function<? super PsiElement, String> tooltipProvider,
                @Nullable GutterIconNavigationHandler<PsiElement> navHandler,
                @NotNull GutterIconRenderer.Alignment alignment) {
            super(element, textRange, icon, updatePass, tooltipProvider, navHandler, alignment);
        }

        @Override
        public boolean canMergeWith(@NotNull MergeableLineMarkerInfo<?> info) {
            return info instanceof MarkerInfo;
        }

        @Override
        public Icon getCommonIcon(@NotNull List<MergeableLineMarkerInfo> infos) {
            return myIcon;
        }

        @NotNull
        @Override
        public Function<? super PsiElement, String> getCommonTooltip(@NotNull List<MergeableLineMarkerInfo> infos) {
            return new ConstantFunction<PsiElement, String>("Navigate to lambda delegate");
        }
    }

    @RequiredReadAction
    @Override
    public void collect(PsiElement psiElement, @NotNull Consumer<LineMarkerInfo> lineMarkerInfos) {
        IElementType elementType = PsiUtilCore.getElementType(psiElement);
        if (elementType == CSharpTokens.DARROW) {
            PsiElement parent = psiElement.getParent();
            if (!(parent instanceof CSharpLambdaExpressionImpl)) {
                return;
            }

            MarkerInfo markerInfo = new MarkerInfo(parent, psiElement.getTextRange(),
                    AllIcons.Gutter.ImplementingFunctional, Pass.UPDATE_ALL,
                    new ConstantFunction<PsiElement, String>("Navigate to lambda delegate"),
                    new GutterIconNavigationHandler<PsiElement>()

                    {
                        @Override
                        @RequiredDispatchThread
                        public void navigate(MouseEvent e, PsiElement elt) {
                            if (!(elt instanceof CSharpLambdaExpressionImpl)) {
                                return;
                            }
                            CSharpLambdaResolveResult lambdaResolveResult = CSharpLambdaExpressionImplUtil
                                    .resolveLeftLambdaTypeRef(elt);
                            if (lambdaResolveResult == null) {
                                return;
                            }

                            PsiElement element = lambdaResolveResult.getElement();
                            if (element instanceof Navigatable) {
                                ((Navigatable) element).navigate(true);
                            }
                        }
                    }, GutterIconRenderer.Alignment.RIGHT);
            NavigateAction.setNavigateAction(markerInfo, "Navigate to lambda delegate",
                    IdeActions.ACTION_GOTO_SUPER);
            lineMarkerInfos.consume(markerInfo);
        }
    }
}