org.sonar.sslr.internal.toolkit.ToolkitPresenter.java Source code

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Here is the source code for org.sonar.sslr.internal.toolkit.ToolkitPresenter.java

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/*
 * SonarSource Language Recognizer
 * Copyright (C) 2010-2016 SonarSource SA
 * mailto:contact AT sonarsource DOT com
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser 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
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with this program; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
 */
package org.sonar.sslr.internal.toolkit;

import com.google.common.annotations.VisibleForTesting;
import com.google.common.base.Preconditions;
import com.google.common.base.Throwables;
import com.google.common.io.Files;
import com.sonar.sslr.api.AstNode;
import com.sonar.sslr.xpath.api.AstNodeXPathQuery;
import org.sonar.sslr.toolkit.ConfigurationModel;
import org.sonar.sslr.toolkit.ConfigurationProperty;

import java.awt.Point;
import java.io.File;
import java.io.IOException;
import java.io.PrintWriter;
import java.io.StringWriter;
import java.io.Writer;
import java.lang.Thread.UncaughtExceptionHandler;

import static com.google.common.base.Preconditions.checkNotNull;
import static com.google.common.base.Preconditions.checkState;

public class ToolkitPresenter {

    private final ConfigurationModel configurationModel;
    private final SourceCodeModel model;
    private ToolkitView view = null;

    public ToolkitPresenter(ConfigurationModel configurationModel, SourceCodeModel model) {
        this.configurationModel = configurationModel;
        this.model = model;
    }

    public void setView(ToolkitView view) {
        checkNotNull(view);
        this.view = view;
    }

    @VisibleForTesting
    void checkInitialized() {
        checkState(view != null, "the view must be set before the presenter can be ran");
    }

    @VisibleForTesting
    void initUncaughtExceptionsHandler() {
        Thread.currentThread().setUncaughtExceptionHandler(new UncaughtExceptionHandler() {
            @Override
            public void uncaughtException(Thread t, Throwable e) {
                Writer result = new StringWriter();
                PrintWriter printWriter = new PrintWriter(result);
                e.printStackTrace(printWriter);

                view.appendToConsole(result.toString());
                view.setFocusOnConsoleView();
            }
        });
    }

    @VisibleForTesting
    void initConfigurationTab() {
        for (ConfigurationProperty configurationProperty : configurationModel.getProperties()) {
            view.addConfigurationProperty(configurationProperty.getName(), configurationProperty.getDescription());
            view.setConfigurationPropertyValue(configurationProperty.getName(), configurationProperty.getValue());
        }
    }

    public void run(String title) {
        checkInitialized();

        initUncaughtExceptionsHandler();

        view.setTitle(title);
        view.displayHighlightedSourceCode("");
        view.displayAst(null);
        view.displayXml("");
        view.disableXPathEvaluateButton();

        initConfigurationTab();

        view.run();
    }

    public void onSourceCodeOpenButtonClick() {
        File fileToParse = view.pickFileToParse();
        if (fileToParse != null) {
            view.clearConsole();
            try {
                view.displayHighlightedSourceCode(Files.toString(fileToParse, configurationModel.getCharset()));
            } catch (IOException e) {
                Throwables.propagate(e);
            }
            model.setSourceCode(fileToParse, configurationModel.getCharset());
            view.displayHighlightedSourceCode(model.getHighlightedSourceCode());
            view.displayAst(model.getAstNode());
            view.displayXml(model.getXml());
            view.scrollSourceCodeTo(new Point(0, 0));
            view.setFocusOnAbstractSyntaxTreeView();
            view.enableXPathEvaluateButton();
        }
    }

    public void onSourceCodeParseButtonClick() {
        view.clearConsole();
        String sourceCode = view.getSourceCode();
        model.setSourceCode(sourceCode);
        Point sourceCodeScrollbarPosition = view.getSourceCodeScrollbarPosition();
        view.displayHighlightedSourceCode(model.getHighlightedSourceCode());
        view.displayAst(model.getAstNode());
        view.displayXml(model.getXml());
        view.scrollSourceCodeTo(sourceCodeScrollbarPosition);
        view.setFocusOnAbstractSyntaxTreeView();
        view.enableXPathEvaluateButton();
    }

    public void onXPathEvaluateButtonClick() {
        String xpath = view.getXPath();
        AstNodeXPathQuery<Object> xpathQuery = AstNodeXPathQuery.create(xpath);

        view.clearConsole();
        view.clearAstSelections();
        view.clearSourceCodeHighlights();

        AstNode firstAstNode = null;
        for (Object resultObject : xpathQuery.selectNodes(model.getAstNode())) {
            if (resultObject instanceof AstNode) {
                AstNode resultAstNode = (AstNode) resultObject;

                if (firstAstNode == null) {
                    firstAstNode = resultAstNode;
                }

                view.selectAstNode(resultAstNode);
                view.highlightSourceCode(resultAstNode);
            }
        }

        view.scrollAstTo(firstAstNode);
        view.scrollSourceCodeTo(firstAstNode);

        view.setFocusOnAbstractSyntaxTreeView();
    }

    public void onSourceCodeKeyTyped() {
        view.displayAst(null);
        view.displayXml("");
        view.clearSourceCodeHighlights();
        view.disableXPathEvaluateButton();
    }

    public void onSourceCodeTextCursorMoved() {
        view.clearAstSelections();
        AstNode astNode = view.getAstNodeFollowingCurrentSourceCodeTextCursorPosition();
        view.selectAstNode(astNode);
        view.scrollAstTo(astNode);
    }

    public void onAstSelectionChanged() {
        view.clearSourceCodeHighlights();

        AstNode firstAstNode = null;

        for (AstNode astNode : view.getSelectedAstNodes()) {
            if (firstAstNode == null) {
                firstAstNode = astNode;
            }

            view.highlightSourceCode(astNode);
        }

        view.scrollSourceCodeTo(firstAstNode);
    }

    public void onConfigurationPropertyFocusLost(String name) {
        ConfigurationProperty configurationProperty = getConfigurationPropertyByName(name);
        Preconditions.checkArgument(configurationProperty != null, "No such configuration property: " + name);

        String newValueCandidate = view.getConfigurationPropertyValue(name);
        String errorMessage = configurationProperty.validate(newValueCandidate);

        view.setConfigurationPropertyErrorMessage(configurationProperty.getName(), errorMessage);

        if ("".equals(errorMessage)) {
            configurationProperty.setValue(newValueCandidate);
            configurationModel.setUpdatedFlag();
        } else {
            view.setFocusOnConfigurationPropertyField(name);
            view.setFocusOnConfigurationView();
        }
    }

    private ConfigurationProperty getConfigurationPropertyByName(String name) {
        for (ConfigurationProperty configurationProperty : configurationModel.getProperties()) {
            if (name.equals(configurationProperty.getName())) {
                return configurationProperty;
            }
        }

        return null;
    }

}