com.intellij.codeInsight.daemon.impl.actions.ShowErrorDescriptionAction.java Source code

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Here is the source code for com.intellij.codeInsight.daemon.impl.actions.ShowErrorDescriptionAction.java

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/*
 * Copyright 2000-2009 JetBrains s.r.o.
 *
 * 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 com.intellij.codeInsight.daemon.impl.actions;

import com.intellij.codeInsight.CodeInsightActionHandler;
import com.intellij.codeInsight.actions.BaseCodeInsightAction;
import com.intellij.codeInsight.daemon.DaemonCodeAnalyzer;
import com.intellij.codeInsight.daemon.impl.DaemonCodeAnalyzerImpl;
import com.intellij.codeInsight.daemon.impl.HighlightInfo;
import com.intellij.codeInsight.daemon.impl.ShowErrorDescriptionHandler;
import com.intellij.openapi.actionSystem.AnActionEvent;
import com.intellij.openapi.actionSystem.IdeActions;
import com.intellij.openapi.actionSystem.ex.ActionManagerEx;
import com.intellij.openapi.editor.Editor;
import com.intellij.openapi.project.DumbAware;
import com.intellij.openapi.project.Project;
import com.intellij.openapi.util.Comparing;
import com.intellij.psi.PsiFile;
import org.jetbrains.annotations.NotNull;

public class ShowErrorDescriptionAction extends BaseCodeInsightAction implements DumbAware {
    private static int width;
    private static boolean shouldShowDescription = false;
    private static boolean descriptionShown = true;

    public ShowErrorDescriptionAction() {
        setEnabledInModalContext(true);
    }

    @NotNull
    @Override
    protected CodeInsightActionHandler getHandler() {
        return new ShowErrorDescriptionHandler(shouldShowDescription ? width : 0);
    }

    @Override
    protected boolean isValidForFile(@NotNull Project project, @NotNull Editor editor, @NotNull PsiFile file) {
        return DaemonCodeAnalyzer.getInstance(project).isHighlightingAvailable(file)
                && isEnabledForFile(project, editor, file);
    }

    private static boolean isEnabledForFile(Project project, Editor editor, PsiFile file) {
        DaemonCodeAnalyzer codeAnalyzer = DaemonCodeAnalyzer.getInstance(project);
        HighlightInfo info = ((DaemonCodeAnalyzerImpl) codeAnalyzer).findHighlightByOffset(editor.getDocument(),
                editor.getCaretModel().getOffset(), false);
        return info != null && info.getDescription() != null;
    }

    @Override
    public void beforeActionPerformedUpdate(@NotNull final AnActionEvent e) {
        super.beforeActionPerformedUpdate(e);
        changeState();
    }

    private static void changeState() {
        if (Comparing.strEqual(ActionManagerEx.getInstanceEx().getPrevPreformedActionId(),
                IdeActions.ACTION_SHOW_ERROR_DESCRIPTION)) {
            shouldShowDescription = descriptionShown;
        } else {
            shouldShowDescription = false;
            descriptionShown = true;
        }
    }

    public static void rememberCurrentWidth(int currentWidth) {
        width = currentWidth;
        descriptionShown = !shouldShowDescription;
    }

}