com.aptana.ide.search.epl.filesystem.ui.text.FileTableContentProvider.java Source code

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Here is the source code for com.aptana.ide.search.epl.filesystem.ui.text.FileTableContentProvider.java

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/*******************************************************************************
 * Copyright (c) 2000, 2008 IBM Corporation 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:
 *     IBM Corporation - initial API and implementation
 *******************************************************************************/
package com.aptana.ide.search.epl.filesystem.ui.text;

import org.eclipse.jface.viewers.IStructuredContentProvider;
import org.eclipse.jface.viewers.TableViewer;
import org.eclipse.jface.viewers.Viewer;
import org.eclipse.search.internal.ui.text.IFileSearchContentProvider;
import org.eclipse.search.ui.text.AbstractTextSearchResult;

import com.aptana.ide.search.epl.FileSystemSearchResult;

/**
 * @author Pavel Petrochenko
 *
 */
public class FileTableContentProvider implements IStructuredContentProvider, IFileSearchContentProvider {

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

    private FileSystemSearchPage fPage;
    private AbstractTextSearchResult fResult;

    /**
     * @param page
     */
    public FileTableContentProvider(FileSystemSearchPage page) {
        this.fPage = page;
    }

    /**
     * @see org.eclipse.jface.viewers.IContentProvider#dispose()
     */
    public void dispose() {
        // nothing to do
    }

    /**
     * @see org.eclipse.jface.viewers.IStructuredContentProvider#getElements(java.lang.Object)
     */
    public Object[] getElements(Object inputElement) {
        if (inputElement instanceof FileSystemSearchResult) {
            int elementLimit = this.getElementLimit();
            Object[] elements = ((FileSystemSearchResult) 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 this.EMPTY_ARR;
    }

    /**
     * @see org.eclipse.jface.viewers.IContentProvider#inputChanged(org.eclipse.jface.viewers.Viewer, java.lang.Object, java.lang.Object)
     */
    public void inputChanged(Viewer viewer, Object oldInput, Object newInput) {
        if (newInput instanceof FileSystemSearchResult) {
            this.fResult = (FileSystemSearchResult) newInput;
        }

    }

    /**
     * @see com.aptana.ide.search.epl.filesystem.ui.text.IFileSearchContentProvider#elementsChanged(java.lang.Object[])
     */
    public void elementsChanged(Object[] updatedElements) {
        TableViewer viewer = this.getViewer();

        int elementLimit = this.getElementLimit();
        boolean tableLimited = elementLimit != -1;
        for (int i = 0; i < updatedElements.length; i++) {
            if (this.fResult.getMatchCount(updatedElements[i]) > 0) {
                if (viewer.testFindItem(updatedElements[i]) != null) {
                    viewer.update(updatedElements[i], null);
                } else {
                    if (!tableLimited || (viewer.getTable().getItemCount() < elementLimit)) {
                        viewer.add(updatedElements[i]);
                    }
                }
            } else {
                viewer.remove(updatedElements[i]);
            }
        }
    }

    private int getElementLimit() {
        Integer elementLimit1 = this.fPage.getElementLimit1();
        if (elementLimit1 == null) {
            return -1;
        }
        return elementLimit1.intValue();
    }

    private TableViewer getViewer() {
        return (TableViewer) this.fPage.getViewer();
    }

    /**
     * @see com.aptana.ide.search.epl.filesystem.ui.text.IFileSearchContentProvider#clear()
     */
    public void clear() {
        this.getViewer().refresh();
    }
}