hydrograph.ui.expression.editor.composites.FunctionsComposite.java Source code

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Here is the source code for hydrograph.ui.expression.editor.composites.FunctionsComposite.java

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/*******************************************************************************
 * Copyright 2017 Capital One Services, LLC and Bitwise, Inc.
 * 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 hydrograph.ui.expression.editor.composites;

import hydrograph.ui.expression.editor.Constants;
import hydrograph.ui.expression.editor.Messages;
import hydrograph.ui.expression.editor.datastructure.MethodDetails;
import hydrograph.ui.expression.editor.util.ExpressionEditorUtil;

import org.apache.commons.lang.StringUtils;
import org.eclipse.swt.SWT;
import org.eclipse.swt.browser.Browser;
import org.eclipse.swt.custom.StyledText;
import org.eclipse.swt.dnd.DragSourceAdapter;
import org.eclipse.swt.dnd.DragSourceEvent;
import org.eclipse.swt.events.MouseAdapter;
import org.eclipse.swt.events.MouseEvent;
import org.eclipse.swt.events.MouseListener;
import org.eclipse.swt.events.SelectionAdapter;
import org.eclipse.swt.events.SelectionEvent;
import org.eclipse.swt.layout.GridData;
import org.eclipse.swt.layout.GridLayout;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.List;

public class FunctionsComposite extends Composite {

    private List methodList;
    protected Browser descriptionStyledText;
    private FunctionsUpperComposite functionUppersComposite;
    private StyledText expressionEditorTextBox;

    /**
     * Create the composite.
     * 
     * @param parent
     * @param expressionEditorTextBox 
     * @param categoriesComposite
     * @param style
     */
    public FunctionsComposite(Composite parent, StyledText expressionEditorTextBox,
            CategoriesComposite categoriesComposite, int style) {
        super(parent, style);
        setLayout(new GridLayout(1, false));
        this.expressionEditorTextBox = expressionEditorTextBox;
        functionUppersComposite = new FunctionsUpperComposite(this, SWT.BORDER);
        GridData gd_composite = new GridData(SWT.FILL, SWT.CENTER, true, false, 1, 1);
        gd_composite.heightHint = 35;
        functionUppersComposite.setLayoutData(gd_composite);

        methodList = new List(this, SWT.BORDER | SWT.V_SCROLL);
        methodList.setLayoutData(new GridData(SWT.FILL, SWT.FILL, true, true, 1, 1));

        addDragSupport();

        linkFunctionAndClassComposite(categoriesComposite);
        functionUppersComposite.setMethodList(methodList);
        functionUppersComposite.setClassNameList(categoriesComposite.getClassNamelist());

        addListnersToMethodList(methodList);
        addDoubleClickListner(methodList);
    }

    private void addDoubleClickListner(final List methodList) {
        methodList.addMouseListener(new MouseAdapter() {
            @Override
            public void mouseDoubleClick(MouseEvent e) {
                if (methodList.getSelectionIndex() != -1
                        && !StringUtils.startsWith(methodList.getItem(methodList.getSelectionIndex()),
                                Messages.CANNOT_SEARCH_INPUT_STRING)) {
                    MethodDetails methodDetails = (MethodDetails) methodList
                            .getData(String.valueOf(methodList.getSelectionIndex()));
                    if (methodDetails != null && StringUtils.isNotBlank(methodDetails.getPlaceHolder())) {
                        expressionEditorTextBox.insert(methodDetails.getPlaceHolder());
                    }
                }
            }
        });
    }

    private void addDragSupport() {
        ExpressionEditorUtil.INSTANCE.getDragSource(methodList).addDragListener(new DragSourceAdapter() {
            public void dragSetData(DragSourceEvent event) {
                if (methodList.getItemCount() != 0
                        && !StringUtils.startsWith(methodList.getItem(0), Messages.CANNOT_SEARCH_INPUT_STRING)) {
                    MethodDetails methodDetails = (MethodDetails) methodList
                            .getData(String.valueOf(methodList.getSelectionIndex()));
                    event.data = methodDetails.getPlaceHolder();
                } else
                    event.data = StringUtils.EMPTY + "#" + StringUtils.EMPTY;
            }
        });
    }

    private void linkFunctionAndClassComposite(CategoriesComposite categoriesComposite) {
        categoriesComposite.setMethodList(methodList);
        categoriesComposite.setFunctionsComposite(this);
        categoriesComposite.setFunctionSearchBox(functionUppersComposite.getFunctionSearchTextBox());
    }

    private void addListnersToMethodList(final List methodsList) {
        methodsList.addSelectionListener(new SelectionAdapter() {
            @Override
            public void widgetSelected(SelectionEvent e) {
                performSelectionActivity(methodsList);
            }
        });

        methodsList.addMouseListener(new MouseListener() {
            @Override
            public void mouseUp(MouseEvent e) {
                /*Do-Nothing*/}

            @Override
            public void mouseDoubleClick(MouseEvent e) {
                /*Do-Nothing*/}

            @Override
            public void mouseDown(MouseEvent e) {
                performSelectionActivity(methodsList);
            }

        });
    }

    private void performSelectionActivity(List methodsList) {
        if (methodsList.getItemCount() != 0
                && !StringUtils.startsWith(methodsList.getItem(0), Messages.CANNOT_SEARCH_INPUT_STRING)) {
            MethodDetails methodDetails = (MethodDetails) methodsList
                    .getData(String.valueOf(methodsList.getSelectionIndex()));
            if (methodDetails != null && StringUtils.isNotBlank(methodDetails.getJavaDoc())) {
                descriptionStyledText.setText(methodDetails.getJavaDoc());
            } else {
                descriptionStyledText.setText(Messages.JAVA_DOC_NOT_AVAILABLE);
            }
        } else {

        }

    }

    public void setDescriptionStyledText(Browser descriptionStyledText) {
        this.descriptionStyledText = descriptionStyledText;
        functionUppersComposite.setDescriptionText(descriptionStyledText);
    }

    @Override
    protected void checkSubclass() {
        // Disable the check that prevents subclassing of SWT components
    }

    public void refresh() {
        functionUppersComposite.refresh();
    }

}