tern.eclipse.ide.server.nodejs.internal.ui.preferences.FileComboFieldEditor.java Source code

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Here is the source code for tern.eclipse.ide.server.nodejs.internal.ui.preferences.FileComboFieldEditor.java

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/**
 *  Copyright (c) 2013-2014 Angelo ZERR.
 *  All rights reserved. This program and the accompanying materials
 *  are made available under the terms of the Eclipse Public License v1.0
 *  which accompanies this distribution, and is available at
 *  http://www.eclipse.org/legal/epl-v10.html
 *
 *  Contributors:
 *  Angelo Zerr <angelo.zerr@gmail.com> - initial API and implementation
 */
package tern.eclipse.ide.server.nodejs.internal.ui.preferences;

import java.io.File;

import org.eclipse.jface.resource.JFaceResources;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.FileDialog;

public class FileComboFieldEditor extends StringButtonComboFieldEditor {
    private String[] extensions;
    private File filterPath;
    private boolean enforceAbsolute;

    protected FileComboFieldEditor(String[] items) {
        super(items);
        this.extensions = null;

        this.filterPath = null;

        this.enforceAbsolute = false;
    }

    public FileComboFieldEditor(String name, String labelText, String[] items, Composite parent) {
        this(name, labelText, false, items, parent);
    }

    public FileComboFieldEditor(String name, String labelText, boolean enforceAbsolute, String[] items,
            Composite parent) {
        this(name, labelText, enforceAbsolute, 1, items, parent);
    }

    public FileComboFieldEditor(String name, String labelText, boolean enforceAbsolute, int validationStrategy,
            String[] items, Composite parent) {
        super(items);

        this.extensions = null;

        this.filterPath = null;

        this.enforceAbsolute = false;

        init(name, labelText);
        this.enforceAbsolute = enforceAbsolute;
        setErrorMessage(JFaceResources.getString("FileFieldEditor.errorMessage"));
        setChangeButtonText(JFaceResources.getString("openBrowse"));
        setValidateStrategy(validationStrategy);
        createControl(parent);
    }

    protected String changePressed() {
        File f = new File(getTextControl().getText());
        if (!(f.exists())) {
            f = null;
        }
        File d = getFile(f);
        if (d == null) {
            return null;
        }

        return d.getAbsolutePath();
    }

    protected boolean checkState() {
        String msg = null;

        String path = getTextControl().getText();
        if (path != null)
            path = path.trim();
        else {
            path = "";
        }
        if (path.length() == 0) {
            if (!(isEmptyStringAllowed()))
                msg = getErrorMessage();
        } else {
            if (!path.equals("node")) {
                File file = new File(path);
                if (file.isFile()) {
                    if ((this.enforceAbsolute) && (!(file.isAbsolute())))
                        msg = JFaceResources.getString("FileFieldEditor.errorMessage2");
                } else {
                    msg = getErrorMessage();
                }
            }
        }

        if (msg != null) {
            showErrorMessage(msg);
            return false;
        }

        if (doCheckState()) {
            clearErrorMessage();
            return true;
        }
        msg = getErrorMessage();
        if (msg != null) {
            showErrorMessage(msg);
        }
        return false;
    }

    private File getFile(File startingDirectory) {
        FileDialog dialog = new FileDialog(getShell(), 268439552);
        if (startingDirectory != null) {
            dialog.setFileName(startingDirectory.getPath());
        } else if (this.filterPath != null) {
            dialog.setFilterPath(this.filterPath.getPath());
        }
        if (this.extensions != null) {
            dialog.setFilterExtensions(this.extensions);
        }
        String file = dialog.open();
        if (file != null) {
            file = file.trim();
            if (file.length() > 0) {
                return new File(file);
            }
        }

        return null;
    }

    public void setFileExtensions(String[] extensions) {
        this.extensions = extensions;
    }

    public void setFilterPath(File path) {
        this.filterPath = path;
    }
}