org.spdx.spdxeclipse.preferences.StringListFieldEditor.java Source code

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Here is the source code for org.spdx.spdxeclipse.preferences.StringListFieldEditor.java

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/**
 * Copyright (c) 2015 Source Auditor 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 org.spdx.spdxeclipse.preferences;

import org.eclipse.jface.preference.FieldEditor;
import org.eclipse.swt.SWT;
import org.eclipse.swt.layout.GridData;
import org.eclipse.swt.widgets.Composite;
import org.spdx.spdxeclipse.ui.StringSelectionGroup;

/**
 * Field editor for simple list of strings
 * @author Gary O'Neall
 *
 */
public class StringListFieldEditor extends FieldEditor {

    private static final String DELIM = ";";
    Composite parent;
    private StringSelectionGroup stringSelection;

    public StringListFieldEditor(String preferenceName, String label, Composite fieldEditorParent) {
        super(preferenceName, label, fieldEditorParent);
    }

    /* (non-Javadoc)
     * @see org.eclipse.jface.preference.FieldEditor#adjustForNumColumns(int)
     */
    @Override
    protected void adjustForNumColumns(int numColumns) {
        GridData gd = ((GridData) parent.getLayoutData());
        gd.horizontalSpan = numColumns;
    }

    /* (non-Javadoc)
     * @see org.eclipse.jface.preference.FieldEditor#doFillIntoGrid(org.eclipse.swt.widgets.Composite, int)
     */
    @Override
    protected void doFillIntoGrid(Composite parent, int numColumns) {
        this.parent = parent;
        this.stringSelection = new StringSelectionGroup(parent, SWT.NONE, this.getLabelText(), new String[0],
                numColumns);
    }

    /* (non-Javadoc)
     * @see org.eclipse.jface.preference.FieldEditor#doLoad()
     */
    @Override
    protected void doLoad() {
        String unparsedList = getPreferenceStore().getString(getPreferenceName());
        String[] list = parseList(unparsedList);
        this.stringSelection.setList(list);
    }

    private String[] parseList(String unparsedList) {
        if (unparsedList == null || unparsedList.trim().isEmpty()) {
            return new String[0];
        }
        String[] retval = unparsedList.split(DELIM);
        for (int i = 0; i < retval.length; i++) {
            retval[i] = retval[i].trim();
        }
        return retval;
    }

    /* (non-Javadoc)
     * @see org.eclipse.jface.preference.FieldEditor#doLoadDefault()
     */
    @Override
    protected void doLoadDefault() {
        String unparsedList = getPreferenceStore().getDefaultString(getPreferenceName());
        String[] list = parseList(unparsedList);
        this.stringSelection.setList(list);
    }

    /* (non-Javadoc)
     * @see org.eclipse.jface.preference.FieldEditor#doStore()
     */
    @Override
    protected void doStore() {
        StringBuilder sb = new StringBuilder();
        String[] list = this.stringSelection.getList();
        if (list != null && list.length > 0) {
            sb.append(list[0]);
            for (int i = 1; i < list.length; i++) {
                sb.append(DELIM);
                sb.append(list[i]);
            }
        }
        getPreferenceStore().setValue(getPreferenceName(), sb.toString());
    }

    /* (non-Javadoc)
     * @see org.eclipse.jface.preference.FieldEditor#getNumberOfControls()
     */
    @Override
    public int getNumberOfControls() {
        return 2;
    }

}