SpecfileLabelProvider.java

/*******************************************************************************
 * Copyright (c) 2007, 2013 Red Hat, Inc.
 * 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:
 *    Red Hat - initial API and implementation
 *******************************************************************************/

package org.eclipse.linuxtools.internal.rpm.ui.editor.outline;

import java.util.regex.Matcher;
import java.util.regex.Pattern;

import org.eclipse.jface.viewers.LabelProvider;
import org.eclipse.linuxtools.internal.rpm.ui.editor.Activator;
import org.eclipse.linuxtools.internal.rpm.ui.editor.parser.SpecfilePreamble;
import org.eclipse.linuxtools.rpm.ui.editor.parser.Specfile;
import org.eclipse.linuxtools.rpm.ui.editor.parser.SpecfileElement;
import org.eclipse.linuxtools.rpm.ui.editor.parser.SpecfilePackage;
import org.eclipse.linuxtools.rpm.ui.editor.parser.SpecfilePackageContainer;
import org.eclipse.linuxtools.rpm.ui.editor.parser.SpecfileSection;
import org.eclipse.swt.graphics.Image;

public class SpecfileLabelProvider extends LabelProvider {

    private static final String PREAMBLE_ICON="icons/preamble_obj.gif"; //$NON-NLS-1$
    private static final String SECTION_ICON="icons/section_obj.gif"; //$NON-NLS-1$
    private static final String PACKAGES_ICON="icons/packages_obj.gif"; //$NON-NLS-1$
    private static final String PACKAGE_ICON="icons/package_obj.gif"; //$NON-NLS-1$

    @Override
    public boolean isLabelProperty(Object element, String property) {
        return false;
    }

    @Override
    public Image getImage(Object element) {
        if (element instanceof SpecfilePackage) {
            return Activator.getDefault().getImage(PACKAGE_ICON);
        } else if (element instanceof SpecfileSection) {
            return Activator.getDefault().getImage(SECTION_ICON);
        } else if (element instanceof SpecfilePackageContainer) {
            return Activator.getDefault().getImage(PACKAGES_ICON);
        }else if (element instanceof SpecfilePreamble) {
            return Activator.getDefault().getImage(PREAMBLE_ICON);
        }
        return null;
    }

    @Override
    public String getText(Object element) {
        String str = ""; //$NON-NLS-1$
        if (element instanceof SpecfileSection) {
            SpecfileSection specfileSection = (SpecfileSection) element;
            str = specfileSection.toString();
        } else if (element instanceof Specfile) {
            str = ((Specfile) element).getName();
        } else if (element instanceof SpecfilePackageContainer) {
            str = Messages.SpecfileLabelProvider_0;
        } else if (element instanceof SpecfilePreamble){
            str = Messages.SpecfileLabelProvider_1;
        } else if (element instanceof SpecfileElement) {
            SpecfileElement specfileElement = (SpecfileElement) element;
            str = specfileElement.getName();
        } else if (element instanceof String) {
            str = (String) element;
        } else if (element instanceof SpecfilePackage) {
            str = ((SpecfilePackage) element).getName();
        }
        return filterMacros(str.trim());
    }

    /**
     * Remove any unresolved macros from the string. These are
     * macros that follow the format %{?...} (e.g. %{?scl_prefix}).
     *
     * @param text The text to filter macros out from.
     * @return A string without unresolved macros.
     *
     * @since 2.1
     */
    private String filterMacros(String text) {
        Pattern variablePattern = Pattern.compile("%\\{\\?\\w+\\}"); //$NON-NLS-1$
        Matcher variableMatcher = variablePattern.matcher(text);
        while (variableMatcher.find()) {
                text = text.replace(variableMatcher.group(0), ""); //$NON-NLS-1$
        }
        return text;
    }

}