com.aptana.ide.search.AptanaFileSearchPage.java Source code

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/**
 * This file Copyright (c) 2005-2010 Aptana, Inc. This program is
 * dual-licensed under both the Aptana Public License and the GNU General
 * Public license. You may elect to use one or the other of these licenses.
 * 
 * This program is distributed in the hope that it will be useful, but
 * AS-IS and WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE, TITLE, or
 * NONINFRINGEMENT. Redistribution, except as permitted by whichever of
 * the GPL or APL you select, is prohibited.
 *
 * 1. For the GPL license (GPL), you can redistribute and/or modify this
 * program under the terms of the GNU General Public License,
 * Version 3, as published by the Free Software Foundation.  You should
 * have received a copy of the GNU General Public License, Version 3 along
 * with this program; if not, write to the Free Software Foundation, Inc., 51
 * Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 * 
 * Aptana provides a special exception to allow redistribution of this file
 * with certain other free and open source software ("FOSS") code and certain additional terms
 * pursuant to Section 7 of the GPL. You may view the exception and these
 * terms on the web at http://www.aptana.com/legal/gpl/.
 * 
 * 2. For the Aptana Public License (APL), this program and the
 * accompanying materials are made available under the terms of the APL
 * v1.0 which accompanies this distribution, and is available at
 * http://www.aptana.com/legal/apl/.
 * 
 * You may view the GPL, Aptana's exception and additional terms, and the
 * APL in the file titled license.html at the root of the corresponding
 * plugin containing this source file.
 * 
 * Any modifications to this file must keep this entire header intact.
 */
package com.aptana.ide.search;

import java.io.File;
import java.lang.reflect.Field;
import java.text.MessageFormat;
import java.util.Arrays;
import java.util.List;
import java.util.Set;

import org.eclipse.core.resources.IFile;
import org.eclipse.core.resources.IResource;
import org.eclipse.core.runtime.IPath;
import org.eclipse.jface.action.ActionContributionItem;
import org.eclipse.jface.action.IContributionItem;
import org.eclipse.jface.action.IMenuManager;
import org.eclipse.jface.action.MenuManager;
import org.eclipse.jface.action.Separator;
import org.eclipse.jface.action.SubContributionItem;
import org.eclipse.jface.viewers.ColumnPixelData;
import org.eclipse.jface.viewers.ColumnWeightData;
import org.eclipse.jface.viewers.DecoratingLabelProvider;
import org.eclipse.jface.viewers.IBaseLabelProvider;
import org.eclipse.jface.viewers.IContentProvider;
import org.eclipse.jface.viewers.ILabelDecorator;
import org.eclipse.jface.viewers.ILabelProvider;
import org.eclipse.jface.viewers.ILabelProviderListener;
import org.eclipse.jface.viewers.IStructuredSelection;
import org.eclipse.jface.viewers.ITableLabelProvider;
import org.eclipse.jface.viewers.ITreeContentProvider;
import org.eclipse.jface.viewers.StructuredSelection;
import org.eclipse.jface.viewers.StructuredViewer;
import org.eclipse.jface.viewers.TableLayout;
import org.eclipse.jface.viewers.TableViewer;
import org.eclipse.jface.viewers.TreeViewer;
import org.eclipse.search.internal.ui.Messages;
import org.eclipse.search.internal.ui.SearchMessages;
import org.eclipse.search.internal.ui.text.FileLabelProvider;
import org.eclipse.search.internal.ui.text.FileSearchPage;
import org.eclipse.search.internal.ui.text.FileSearchQuery;
import org.eclipse.search.internal.ui.text.FileSearchResult;
import org.eclipse.search.internal.ui.text.ReplaceAction;
import org.eclipse.search.ui.IContextMenuConstants;
import org.eclipse.search.ui.SearchResultEvent;
import org.eclipse.search.ui.text.AbstractTextSearchResult;
import org.eclipse.search.ui.text.AbstractTextSearchViewPage;
import org.eclipse.search.ui.text.Match;
import org.eclipse.search.ui.text.MatchEvent;
import org.eclipse.search.ui.text.RemoveAllEvent;
import org.eclipse.search2.internal.ui.basic.views.SetLayoutAction;
import org.eclipse.swt.SWT;
import org.eclipse.swt.graphics.Image;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Event;
import org.eclipse.swt.widgets.Listener;
import org.eclipse.swt.widgets.Table;
import org.eclipse.swt.widgets.TableColumn;
import org.eclipse.swt.widgets.TableItem;
import org.eclipse.ui.IMemento;
import org.eclipse.ui.model.WorkbenchLabelProvider;
import org.eclipse.ui.part.IPageSite;

import com.aptana.ide.core.IdeLog;
import com.aptana.ide.core.ui.PixelConverter;
import com.aptana.ide.core.ui.PreferenceUtils;
import com.aptana.ide.search.epl.AptanaFileMatch;
import com.aptana.ide.search.epl.Compatibility;

/**
 * custom search page with extra layout for showing matches in list
 * @author Pavel Petrochenko
 */
public class AptanaFileSearchPage extends FileSearchPage {

    /**
     * method for obtaining element limit for table viewers
     * 
     * @return Integer
     * @see com.aptana.ide.search.epl.filesystem.ui.text.FileSystemSearchPage#getElementLimit()
     */
    public Integer getElementLimit1() {
        if (Compatibility.isTableLimited()) {
            return new Integer(Compatibility.getTableLimit());
        }
        return new Integer(-1);
    }

    protected void evaluateChangedElements(Match[] matches, Set changedElements) {
        for (int i = 0; i < matches.length; i++) {
            changedElements.add(matches[i].getElement());
        }
    }

    /**
     * table provider for a matches
     * @author Pavel Petrochenko
     */
    private final class MatchesTableLabelProvider implements ITableLabelProvider, ILabelProvider {
        private WorkbenchLabelProvider fLabelProvider = new WorkbenchLabelProvider();
        private String[] fArgs = new String[2];
        private static final String fgSeparatorFormat = "{0} - {1}"; //$NON-NLS-1$

        /**
         * @see org.eclipse.jface.viewers.ITableLabelProvider#getColumnImage(java.lang.Object, int)
         */
        public Image getColumnImage(Object element, int columnIndex) {
            if (columnIndex == 0) {
                return fLabelProvider.getImage(((Match) element).getElement());
            }
            return null;
        }

        /**
         * @param resource 
         * @return text label for a given resources depending on sorting options
         */
        public String getText(IResource resource) {
            String text;

            if (!resource.exists()) {
                text = SearchMessages.FileLabelProvider_removed_resource_label;
            } else {
                IPath path = resource.getFullPath().removeLastSegments(1);
                if (path.getDevice() == null) {
                    path = path.makeRelative();
                }
                if ((AptanaFileSearchPage.this.fOrder == AptanaFileSearchPage.SHOW_LABEL)
                        || (AptanaFileSearchPage.this.fOrder == AptanaFileSearchPage.SHOW_LABEL_PATH)) {
                    text = this.fLabelProvider.getText(resource);
                    if ((path != null)
                            && (AptanaFileSearchPage.this.fOrder == AptanaFileSearchPage.SHOW_LABEL_PATH)) {
                        this.fArgs[0] = text;
                        this.fArgs[1] = path.toString();
                        text = MessageFormat.format(MatchesTableLabelProvider.fgSeparatorFormat, this.fArgs);
                    }
                } else {
                    if (path != null) {
                        text = path.toString();
                    } else {
                        text = ""; //$NON-NLS-1$
                    }
                    if (AptanaFileSearchPage.this.fOrder == AptanaFileSearchPage.SHOW_PATH_LABEL) {
                        this.fArgs[0] = text;
                        this.fArgs[1] = this.fLabelProvider.getText(resource);
                        text = MessageFormat.format(MatchesTableLabelProvider.fgSeparatorFormat, this.fArgs);
                    }
                }
            }
            return text;
        }

        /**
         * @see org.eclipse.jface.viewers.ITableLabelProvider#getColumnText(java.lang.Object, int)
         */
        public String getColumnText(Object element, int columnIndex) {
            if (!(element instanceof AptanaFileMatch)) {
                return ""; //$NON-NLS-1$
            }
            AptanaFileMatch match = (AptanaFileMatch) element;
            if (columnIndex == 0) {
                IFile file = match.getFile();
                if (file == null) {
                    return match.getElement().toString();
                }
                return this.getText(file);
            }
            if (columnIndex == 1) {
                return Integer.toString(match.getLineNumber());
            }
            return ""; //$NON-NLS-1$
        }

        /**
         * @see org.eclipse.jface.viewers.IBaseLabelProvider#addListener(org.eclipse.jface.viewers.ILabelProviderListener)
         */
        public void addListener(ILabelProviderListener listener) {
            AptanaFileSearchPage.this.baseLabelProvider.addListener(listener);
        }

        /**
         * @see org.eclipse.jface.viewers.IBaseLabelProvider#dispose()
         */
        public void dispose() {

        }

        /**
         * delegating to base label provider
         * @see org.eclipse.jface.viewers.IBaseLabelProvider#isLabelProperty(java.lang.Object, java.lang.String)
         */
        public boolean isLabelProperty(Object element, String property) {
            return AptanaFileSearchPage.this.baseLabelProvider.isLabelProperty(element, property);
        }

        /**
         * delegating to base label provider
         * @see org.eclipse.jface.viewers.IBaseLabelProvider#removeListener(org.eclipse.jface.viewers.ILabelProviderListener)
         */
        public void removeListener(ILabelProviderListener listener) {
            AptanaFileSearchPage.this.baseLabelProvider.removeListener(listener);
        }

        /**
         * @see org.eclipse.jface.viewers.ILabelProvider#getImage(java.lang.Object)
         */
        public Image getImage(Object element) {
            return null;
        }

        /**
         * text for exporting to clipboard
         * @see org.eclipse.jface.viewers.ILabelProvider#getText(java.lang.Object)
         */
        public String getText(Object element) {
            StringBuilder bld = new StringBuilder();
            bld.append(this.getColumnText(element, 0));
            bld.append('\t');
            bld.append(this.getColumnText(element, 1));
            bld.append('\t');
            bld.append(((AptanaFileMatch) element).getLineContent());
            return bld.toString();
        }
    }

    static final Object[] NO_ELEMENTS = new Object[0];
    static final Match[] NO_MATCH = new Match[0];

    private static final int LAYOUT_MATCHES = 4;

    ITreeContentProvider provider;

    boolean turnOff;

    /**
     * sort constant
     * SHOW_LABEL
     */

    public static final int SHOW_LABEL = 1;

    /**
     * sort constant
     * SHOW_LABEL_PATH
     */
    public static final int SHOW_LABEL_PATH = 2;

    /**
     * sort constant
     * SHOW_PATH_LABEL
     */
    public static final int SHOW_PATH_LABEL = 3;

    private int fOrder = AptanaFileSearchPage.SHOW_LABEL_PATH;

    /**
     * ovverriden to make it working for matching layout
     * @see org.eclipse.search.internal.ui.text.FileSearchPage#fillContextMenu(org.eclipse.jface.action.IMenuManager)
     */
    protected void fillContextMenu(IMenuManager mgr) {
        try {
            super.fillContextMenu(mgr);
            Separator find = (Separator) mgr.find(IContextMenuConstants.GROUP_REORGANIZE);
            IContributionItem[] items = find.getParent().getItems();
            int indexOf = Arrays.asList(items).indexOf(find);
            mgr.remove(items[indexOf + 1]);
            mgr.remove(items[indexOf + 2]);
            doAdd(mgr);
        } catch (ClassCastException e) {
            // should be here if our layout is active
            doAdd(mgr);

        }
        if (this.layout == AptanaFileSearchPage.LAYOUT_MATCHES) {
            Separator find = (Separator) mgr.find(IContextMenuConstants.GROUP_VIEWER_SETUP);
            IContributionItem[] items = find.getParent().getItems();
            int indexOf = Arrays.asList(items).indexOf(find);
            MenuManager contributionItem = (MenuManager) items[indexOf + 1];
            IContributionItem[] items2 = contributionItem.getItems();
            ActionContributionItem it0 = (ActionContributionItem) items2[0];
            ActionContributionItem it1 = (ActionContributionItem) items2[1];
            it0.getAction().setChecked(this.fOrder == AptanaFileSearchPage.SHOW_LABEL_PATH);
            it1.getAction().setChecked(this.fOrder == AptanaFileSearchPage.SHOW_PATH_LABEL);
        }
    }

    private void doAdd(IMenuManager mgr) {
        IStructuredSelection selection = (IStructuredSelection) getViewer().getSelection();
        if (!selection.isEmpty()) {
            ReplaceAction replaceSelection = new ReplaceAction(getSite().getShell(), (FileSearchResult) getInput(),
                    selection.toArray(), true);
            replaceSelection.setText(SearchMessages.ReplaceAction_label_selected);
            mgr.appendToGroup(IContextMenuConstants.GROUP_REORGANIZE, replaceSelection);
        }
        ReplaceAction replaceAll = new ReplaceAction(getSite().getShell(), (FileSearchResult) getInput(), null,
                true);
        replaceAll.setText(SearchMessages.ReplaceAction_label_all);
        mgr.appendToGroup(IContextMenuConstants.GROUP_REORGANIZE, replaceAll);
    }

    /**
     * ovverriden to make it working for matching layout
     * @see org.eclipse.search.internal.ui.text.FileSearchPage#getLabel()
     */
    public String getLabel() {
        AbstractTextSearchResult input = this.getInput();
        // we are in out layout
        if (this.layout == AptanaFileSearchPage.LAYOUT_MATCHES) {
            if (input == null) {
                return ""; //$NON-NLS-1$
            }
            String label = input.getLabel();
            TableViewer viewer = (TableViewer) this.getViewer();
            int itemCount = viewer.getTable().getItemCount();
            int matchCount = this.getInput().getMatchCount();
            if (itemCount < matchCount) {
                return Messages.format(com.aptana.ide.search.Messages.AptanaFileSearchPage_NOT_ALL_MATCHES,
                        new Object[] { label, new Integer(itemCount), new Integer(matchCount) });
            }
        }
        return super.getLabel();
    }

    public int getDisplayedMatchCount(Object element) {
        if (showLineMatches()) {
            if (element instanceof IFile || element instanceof File) {
                AbstractTextSearchResult result = getInput();
                if (result == null) {
                    return 0;
                }
                return this.getInput().getMatchCount();
            }
            return 0;
        }
        return super.getDisplayedMatchCount(element);
    }

    public Match[] getDisplayedMatches(Object element) {
        if (showLineMatches()) {
            if (element instanceof IFile || element instanceof File) {
                AbstractTextSearchResult result = getInput();
                if (result == null) {
                    return EMPTY_MATCH_ARRAY;
                }
                return this.getInput().getMatches(element);
            }
            return EMPTY_MATCH_ARRAY;
        }
        return super.getDisplayedMatches(element);
    }

    private boolean showLineMatches() {
        AbstractTextSearchResult input = getInput();
        return getLayout() == FLAG_LAYOUT_TREE && input != null
                && !((FileSearchQuery) input.getQuery()).isFileNameSearch();
    }

    /**
     * @param site
     * @see org.eclipse.search.ui.text.AbstractTextSearchViewPage#createControl(org.eclipse.swt.widgets.Composite)
     */
    public void init(IPageSite site) {
        super.init(site);
        site.getActionBars().getMenuManager().appendToGroup(IContextMenuConstants.GROUP_VIEWER_SETUP,
                this.fFlatAction);
    }

    private SetLayoutAction fFlatAction = new SetLayoutAction(this,
            com.aptana.ide.search.Messages.AptanaFileSearchPage_ShowMatches,
            com.aptana.ide.search.Messages.AptanaFileSearchPage_ShowMatchesTooltip,
            AptanaFileSearchPage.LAYOUT_MATCHES);

    /**
     * our constructor
     */
    public AptanaFileSearchPage() {
        fFlatAction.setImageDescriptor(
                Activator.imageDescriptorFromPlugin(Activator.PLUGIN_ID, "/icons/verticalOrientation.gif")); //$NON-NLS-1$
    }

    int layout;
    private static final String KEY_LAYOUT = "org.eclipse.search.resultpage.layout"; //$NON-NLS-1$
    private static final String KEY_SORTING = "org.eclipse.search.resultpage.sorting"; //$NON-NLS-1$

    private MatchesContentProvider structuredContentProvider;
    private Listener listener;
    private Listener listener1;

    /**
     * @see org.eclipse.search.internal.ui.text.FileSearchPage#setSortOrder(int)
     */
    public void setSortOrder(int sortOrder) {
        if (this.layout == AptanaFileSearchPage.LAYOUT_MATCHES) {
            this.fOrder = sortOrder;
            this.getSettings().put(AptanaFileSearchPage.KEY_SORTING, sortOrder);
            this.getViewer().refresh();
            return;
        }
        super.setSortOrder(sortOrder);
    }

    /**
     * ovverriden to obtain true options and to correct memento and dialog settings
     * before invoking superclass method
     * @see org.eclipse.search.internal.ui.text.FileSearchPage#restoreState(org.eclipse.ui.IMemento)
     */
    public void restoreState(IMemento memento) {
        try {
            this.layout = this.getSettings().getInt(AptanaFileSearchPage.KEY_LAYOUT);
        } catch (NumberFormatException e) {
            layout = FLAG_LAYOUT_TREE;
        }
        if (this.layout == AptanaFileSearchPage.LAYOUT_MATCHES) {
            this.getSettings().put(AptanaFileSearchPage.KEY_LAYOUT, AbstractTextSearchViewPage.FLAG_LAYOUT_FLAT);
        }
        if (memento != null) {
            Integer l = memento.getInteger(AptanaFileSearchPage.KEY_LAYOUT);
            if (l != null) {
                this.layout = l.intValue();
                if (this.layout == AptanaFileSearchPage.LAYOUT_MATCHES) {
                    memento.putInteger(AptanaFileSearchPage.KEY_LAYOUT,
                            AbstractTextSearchViewPage.FLAG_LAYOUT_FLAT);
                }
            }
        }
        super.restoreState(memento);
        try {
            this.fOrder = this.getSettings().getInt(AptanaFileSearchPage.KEY_SORTING);
        } catch (NumberFormatException e) {
            this.fOrder = AptanaFileSearchPage.SHOW_LABEL_PATH;
        }
        if (memento != null) {
            Integer value = memento.getInteger(AptanaFileSearchPage.KEY_SORTING);
            if (value != null) {
                this.fOrder = value.intValue();
            }
        }
    }

    /**
     * ovverriding to restore matching layout if needed
     * @see org.eclipse.search.ui.text.AbstractTextSearchViewPage#createControl(org.eclipse.swt.widgets.Composite)
     */
    public void createControl(Composite parent) {
        super.createControl(parent);
        if (this.layout == AptanaFileSearchPage.LAYOUT_MATCHES) {
            this.layout = 1;
            this.setLayout(AptanaFileSearchPage.LAYOUT_MATCHES);
        }
    }

    /**
     * saving state
     * @see org.eclipse.search.internal.ui.text.FileSearchPage#saveState(org.eclipse.ui.IMemento)
     */
    public void saveState(IMemento memento) {
        memento.putInteger(AptanaFileSearchPage.KEY_LAYOUT, this.layout);
    }

    /**
     * this method manages setting correct layout
     * in case of matching layout it delegates to super for creating table viewer
     * and then reconfigures it. 
     * @see org.eclipse.search.ui.text.AbstractTextSearchViewPage#setLayout(int)
     */
    public void setLayout(int layout) {
        if (this.layout == layout) {
            return;
        }
        if (layout == AptanaFileSearchPage.LAYOUT_MATCHES) {
            this.getControl().setRedraw(false);

            if (this.getLayout() != AbstractTextSearchViewPage.FLAG_LAYOUT_FLAT) {
                super.setLayout(AbstractTextSearchViewPage.FLAG_LAYOUT_FLAT);
            }
            this.layout = layout;
            this.reconfigureTableViewer();
            this.getControl().setRedraw(true);
            ((Composite) this.getControl()).layout(true, true);
            this.getControl().redraw();
            Separator find = (Separator) this.getSite().getActionBars().getMenuManager()
                    .find(IContextMenuConstants.GROUP_VIEWER_SETUP);
            IContributionItem[] items = find.getParent().getItems();
            int indexOf = Arrays.asList(items).indexOf(find);
            SubContributionItem contributionItem = (SubContributionItem) items[indexOf + 1];
            ActionContributionItem ac = (ActionContributionItem) contributionItem.getInnerItem();
            ac.getAction().setChecked(false);
            contributionItem = (SubContributionItem) items[indexOf + 3];
            ac = (ActionContributionItem) contributionItem.getInnerItem();
            ac.getAction().setChecked(true);
            find.update();
            this.getSettings().put(AptanaFileSearchPage.KEY_LAYOUT, layout);
        } else {

            if (this.layout == AptanaFileSearchPage.LAYOUT_MATCHES) {
                this.layout = layout;
                if (layout == AbstractTextSearchViewPage.FLAG_LAYOUT_FLAT) {
                    this.getControl().setRedraw(false);
                    super.setLayout(AbstractTextSearchViewPage.FLAG_LAYOUT_TREE);
                    super.setLayout(AbstractTextSearchViewPage.FLAG_LAYOUT_FLAT);
                    ((Composite) this.getControl()).layout(true, true);
                    this.getControl().setRedraw(true);
                    return;
                }
            }
            this.layout = layout;
            super.setLayout(layout);
        }
    }

    /**
     * hack for obtaining correct match
     * uses stack trace to ovverride behaviour if is called from magic super class methods
     * @see org.eclipse.search.ui.text.AbstractTextSearchViewPage#getCurrentMatch()
     */
    public Match getCurrentMatch() {
        if (this.layout == AptanaFileSearchPage.LAYOUT_MATCHES) {
            // hack for returning correct results for next and previous matches
            StackTraceElement[] stackTrace = new Exception().getStackTrace();
            String methodName = stackTrace[1].getMethodName();
            if (methodName.equals("gotoNextMatch")) //$NON-NLS-1$
            {
                return null;
            }
            if (methodName.equals("gotoPreviousMatch")) //$NON-NLS-1$
            {
                return null;
            }

            IStructuredSelection selection = (IStructuredSelection) this.getViewer().getSelection();
            Object element = selection.getFirstElement();
            return (Match) element;
        }
        return super.getCurrentMatch();
    }

    private PixelConverter metrics;
    private DecoratingFileSearchLabelProvider baseLabelProvider;

    /**
     * removing matches
     * @see org.eclipse.search.ui.text.AbstractTextSearchViewPage#internalRemoveSelected()
     */
    public void internalRemoveSelected() {
        if (this.layout != AptanaFileSearchPage.LAYOUT_MATCHES) {
            super.internalRemoveSelected();
        } else {
            TableViewer cc = (TableViewer) this.getViewer();
            StructuredSelection ss = (StructuredSelection) cc.getSelection();
            List list = ss.toList();
            Match[] ms = new Match[list.size()];
            list.toArray(ms);
            this.getInput().removeMatches(ms);
            getViewPart().updateLabel();
        }
    }

    /**
     * custom handling of changes in search result for mathces mode
     * @see org.eclipse.search.ui.text.AbstractTextSearchViewPage#handleSearchResultChanged(org.eclipse.search.ui.SearchResultEvent)
     */
    protected void handleSearchResultChanged(final SearchResultEvent e) {
        if (this.layout != AptanaFileSearchPage.LAYOUT_MATCHES) {
            super.handleSearchResultChanged(e);
            return;
        }
        if (e instanceof MatchEvent) {
            MatchEvent me = (MatchEvent) e;
            int kind = me.getKind();
            if ((Display.getCurrent() != null) && (kind == MatchEvent.REMOVED)) {
                TableViewer cc = (TableViewer) this.getViewer();
                Table table = cc.getTable();
                int selectionIndex = table.getSelectionIndex();
                cc.refresh();
                if (selectionIndex != -1) {
                    if (selectionIndex < table.getItemCount()) {
                        TableItem item = cc.getTable().getItem(selectionIndex);
                        cc.setSelection(new StructuredSelection(item.getData()));
                    }
                }
            } else {
                super.handleSearchResultChanged(e);
            }
            // elementsChanged(me.getMatches());

        } else if (e instanceof RemoveAllEvent) {
            super.handleSearchResultChanged(e);
        }
    }

    /**
     * we are reconfiguring table viewer to matches mode here
     */
    private void reconfigureTableViewer() {

        TableViewer tViewer = (TableViewer) this.getViewer();
        TableColumn[] columns = tViewer.getTable().getColumns();
        for (int a = 0; a < columns.length; a++) {
            columns[a].dispose();
        }
        this.metrics = new PixelConverter(tViewer.getControl());
        tViewer.getTable().setHeaderVisible(true);
        TableColumn clmn = new TableColumn(tViewer.getTable(), SWT.LEFT);
        clmn.setText(com.aptana.ide.search.Messages.AptanaFileSearchPage_File);
        TableColumn clmn1 = new TableColumn(tViewer.getTable(), SWT.LEFT);
        clmn1.setText(com.aptana.ide.search.Messages.AptanaFileSearchPage_Line);
        TableColumn clmn2 = new TableColumn(tViewer.getTable(), SWT.LEFT);
        clmn2.setText(com.aptana.ide.search.Messages.AptanaFileSearchPage_Source);

        TableLayout tableLayout = new TableLayout();
        tableLayout.addColumnData(new ColumnWeightData(1));
        tableLayout.addColumnData(new ColumnPixelData(50));
        tableLayout.addColumnData(new ColumnWeightData(1));
        PreferenceUtils.persist(Activator.getDefault().getPreferenceStore(), tViewer.getTable(), "tviewer"); //$NON-NLS-1$
        this.listener = new Listener() {

            public void handleEvent(Event event) {
                if (event.index == 2) {
                    AptanaFileMatch aptanaFileMatch = ((AptanaFileMatch) event.item.getData());
                    if (aptanaFileMatch != null) {
                        event.gc.drawText(aptanaFileMatch.getLineContent(), event.x, event.y);
                    }
                }
            }

        };
        this.listener1 = new Listener() {

            public void handleEvent(Event event) {

                if (event.index == 2) {
                    AptanaFileMatch aptanaFileMatch = ((AptanaFileMatch) event.item.getData());
                    if (aptanaFileMatch != null) {
                        event.width = AptanaFileSearchPage.this.metrics
                                .convertWidthInCharsToPixels(aptanaFileMatch.getLineContent().length());
                    }
                }
            }

        };
        tViewer.getTable().addListener(SWT.PaintItem, this.listener);
        tViewer.getTable().setLayout(tableLayout);
        IBaseLabelProvider labelProvider = tViewer.getLabelProvider();
        //if (labelProvider instanceof DecoratingLabelProvider){
        labelProvider = new DecoratingFileSearchLabelProvider(
                new FileLabelProvider(this, FileLabelProvider.SHOW_LABEL_PATH));
        tViewer.setLabelProvider(labelProvider);
        baseLabelProvider = (DecoratingFileSearchLabelProvider) labelProvider;
        tViewer.setInput(null);
        tViewer.setLabelProvider(new MatchesTableLabelProvider());
        final IContentProvider contentProvider = tViewer.getContentProvider();
        this.structuredContentProvider = new MatchesContentProvider(this, contentProvider);
        tViewer.setContentProvider(this.structuredContentProvider);
        tViewer.setInput(this.getInput());
        tViewer.getTable().getParent().layout(true);
    }

    /**
     * clearing viewer content 
     * custom handling for matches layout
     * @see org.eclipse.search.internal.ui.text.FileSearchPage#clear()
     */
    protected void clear() {
        StructuredViewer viewer = this.getViewer();
        if (this.layout == AptanaFileSearchPage.LAYOUT_MATCHES) {
            viewer.getControl().setRedraw(false);
            viewer.getControl().removeListener(SWT.PaintItem, this.listener);
            viewer.getControl().removeListener(SWT.MeasureItem, this.listener1);
            super.clear();
            viewer.getControl().setRedraw(true);
            viewer.getControl().addListener(SWT.PaintItem, this.listener);
            viewer.getControl().addListener(SWT.MeasureItem, this.listener1);
        } else {
            super.clear();
        }
    }

    /**
     * custom handling for mathces layout
     * @see org.eclipse.search.internal.ui.text.FileSearchPage#elementsChanged(java.lang.Object[])
     */
    protected void elementsChanged(Object[] objects) {
        if (this.layout != AptanaFileSearchPage.LAYOUT_MATCHES) {
            super.elementsChanged(objects);
        } else {
            // if (structuredContentProvider!=null){
            this.structuredContentProvider.elementsChanged(objects);
        }
    }

    /**
     * installing our decorator here.
     * @see org.eclipse.search.internal.ui.text.FileSearchPage#configureTreeViewer(org.eclipse.jface.viewers.TreeViewer)
     */
    protected void configureTreeViewer(TreeViewer viewer) {
        super.configureTreeViewer(viewer);
        FileTreeContentProvider provider2 = new FileTreeContentProvider(this, viewer) {

        };
        viewer.setContentProvider(provider2);
        try {
            Field field = FileSearchPage.class.getDeclaredField("fContentProvider"); //$NON-NLS-1$
            field.setAccessible(true);
            field.set(this, provider2);
        } catch (Exception e) {
            IdeLog.logError(Activator.getDefault(), "Error during conifguration using reflection", e); //$NON-NLS-1$
        }

        final DecoratingFileSearchLabelProvider labelProvider = new DecoratingFileSearchLabelProvider(
                new FileLabelProvider(this, FileLabelProvider.SHOW_LABEL_PATH));
        DecoratingLabelProvider decoratingLabelProvider = new DecoratingLabelProvider(labelProvider,
                new AptanaExtraDecorator(this)) {

            public void setLabelDecorator(ILabelDecorator decorator) {
                if (decorator != null) {
                    AptanaFileSearchPage.this.turnOff = true;
                }
                labelProvider.setLabelDecorator(decorator);
                AptanaFileSearchPage.this.turnOff = false;
            }

            public void dispose() {

            }

        };
        viewer.setInput(getInput());
        this.provider = (ITreeContentProvider) viewer.getContentProvider();
        viewer.setLabelProvider(decoratingLabelProvider);
    }

}