org.eclipse.mylyn.internal.tasks.ui.editors.LabelsAttributeEditor.java Source code

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Here is the source code for org.eclipse.mylyn.internal.tasks.ui.editors.LabelsAttributeEditor.java

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/*******************************************************************************
 * Copyright (c) 2015 Tasktop Technologies and others.
 * 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:
 *     Tasktop Technologies - initial API and implementation
 *******************************************************************************/

package org.eclipse.mylyn.internal.tasks.ui.editors;

import java.util.Arrays;
import java.util.List;

import org.eclipse.mylyn.tasks.core.data.TaskAttribute;
import org.eclipse.mylyn.tasks.core.data.TaskDataModel;
import org.eclipse.mylyn.tasks.ui.editors.LayoutHint;
import org.eclipse.mylyn.tasks.ui.editors.LayoutHint.ColumnSpan;
import org.eclipse.mylyn.tasks.ui.editors.LayoutHint.RowSpan;
import org.eclipse.swt.SWT;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.ui.forms.widgets.FormToolkit;

import com.google.common.base.Function;
import com.google.common.base.Joiner;
import com.google.common.base.Predicate;
import com.google.common.base.Strings;
import com.google.common.collect.FluentIterable;

public class LabelsAttributeEditor extends TextAttributeEditor {

    private static final String VALUE_SEPARATOR = ","; //$NON-NLS-1$

    private final boolean isMultiSelect;

    public LabelsAttributeEditor(TaskDataModel manager, TaskAttribute taskAttribute) {
        super(manager, taskAttribute);
        this.isMultiSelect = TaskAttribute.TYPE_MULTI_SELECT.equals(taskAttribute.getMetaData().getType());
        if (!isReadOnly() && isMultiSelect) {
            setLayoutHint(new LayoutHint(RowSpan.MULTIPLE, ColumnSpan.SINGLE));
        }
    }

    @Override
    public void createControl(Composite parent, FormToolkit toolkit) {
        super.createControl(parent, toolkit, (isMultiSelect ? SWT.WRAP : SWT.NONE));
        if (!isReadOnly() && isMultiSelect) {
            getText().setToolTipText("Separate multiple values with a comma"); //$NON-NLS-1$
        }
    }

    @Override
    public String getValue() {
        if (isMultiSelect) {
            List<String> values = getAttributeMapper().getValues(getTaskAttribute());
            return Joiner.on(VALUE_SEPARATOR + " ").skipNulls().join(values); //$NON-NLS-1$
        } else {
            return getAttributeMapper().getValue(getTaskAttribute());
        }
    }

    @Override
    public void setValue(String text) {
        if (isMultiSelect) {
            String[] values = text.split(VALUE_SEPARATOR);
            getAttributeMapper().setValues(getTaskAttribute(), getTrimmedValues(values));
        } else {
            getAttributeMapper().setValue(getTaskAttribute(), text);
        }
        attributeChanged();
    }

    public static List<String> getTrimmedValues(String[] values) {
        return FluentIterable.from(Arrays.asList(values)).transform(new Function<String, String>() {
            @Override
            public String apply(String input) {
                return Strings.nullToEmpty(input).trim();
            }
        }).filter(new Predicate<String>() {
            @Override
            public boolean apply(String input) {
                return !Strings.isNullOrEmpty(input);
            }
        }).toList();
    }
}