org.eclipse.xtend.shared.ui.editor.search.view.XtendXpandTableContentProvider.java Source code

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Here is the source code for org.eclipse.xtend.shared.ui.editor.search.view.XtendXpandTableContentProvider.java

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/*******************************************************************************
 * Copyright (c) 2005 - 2007 committers of openArchitectureWare 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: committers of openArchitectureWare - initial API and
 * implementation
 ******************************************************************************/
package org.eclipse.xtend.shared.ui.editor.search.view;

import org.eclipse.jface.viewers.IStructuredContentProvider;
import org.eclipse.jface.viewers.TableViewer;
import org.eclipse.jface.viewers.Viewer;
import org.eclipse.search.ui.text.AbstractTextSearchResult;
import org.eclipse.xtend.shared.ui.editor.search.query.XtendXpandSearchResult;

/**
 * <code>XtendXpandTableContentProvider</code> is a chnage/aware content provider for
 * the search result list view.
 * 
 * @author Peter Friese
 */
public class XtendXpandTableContentProvider implements IStructuredContentProvider, IFileSearchContentProvider {

    private final Object[] EMPTY_ARR = new Object[0];

    private final XtendXpandSearchResultPage page;
    private AbstractTextSearchResult result;

    /**
     * Creates a new <code>XtendXpandTableContentProvider</code>.
     * 
     * @param page
     *            The Xtend search result page this content provider is associated
     *            with.
     */
    public XtendXpandTableContentProvider(XtendXpandSearchResultPage page) {
        this.page = page;
    }

    /**
     * {@inheritDoc}
     */
    public Object[] getElements(Object inputElement) {
        if (inputElement instanceof XtendXpandSearchResult) {
            int elementLimit = 1000; // getElementLimit();
            Object[] elements = ((XtendXpandSearchResult) inputElement).getElements();
            if (elementLimit != -1 && elements.length > elementLimit) {
                Object[] shownElements = new Object[elementLimit];
                System.arraycopy(elements, 0, shownElements, 0, elementLimit);
                return shownElements;
            }
            return elements;
        }
        return EMPTY_ARR;
    }

    /**
     * {@inheritDoc}
     */
    public void inputChanged(Viewer viewer, Object oldInput, Object newInput) {
        if (newInput instanceof XtendXpandSearchResult) {
            result = (XtendXpandSearchResult) newInput;
        }
    }

    /**
     * {@inheritDoc}
     */
    public void elementsChanged(Object[] updatedElements) {
        TableViewer viewer = getViewer();
        int elementLimit = 1000; // getElementLimit();
        boolean tableLimited = elementLimit != -1;
        for (Object element : updatedElements) {
            if (result.getMatchCount(element) > 0) {
                if (viewer.testFindItem(element) != null) {
                    viewer.update(element, null);
                } else {
                    if (!tableLimited || viewer.getTable().getItemCount() < elementLimit) {
                        viewer.add(element);
                    }
                }
            } else {
                viewer.remove(element);
            }
        }
    }

    // private int getElementLimit() {
    // return page.getElementLimit().intValue();
    // }

    private TableViewer getViewer() {
        return (TableViewer) page.getViewer();
    }

    /**
     * {@inheritDoc}
     */
    public void clear() {
        getViewer().refresh();
    }

    /**
     * {@inheritDoc}
     */
    public void dispose() {
    }
}