org.eclipse.search/search/org/eclipse/search/internal/ui/SearchResultViewer.java - platform/eclipse.platform.text - Git at Google

 /*
  * (c) Copyright IBM Corp. 2000, 2001.
  * All Rights Reserved.
  */
 package org.eclipse.search.internal.ui;


 import org.eclipse.core.runtime.IPath;

 import org.eclipse.swt.SWT;
 import org.eclipse.swt.events.DisposeEvent;
 import org.eclipse.swt.events.KeyAdapter;
 import org.eclipse.swt.events.KeyEvent;
 import org.eclipse.swt.graphics.Color;
 import org.eclipse.swt.widgets.Composite;
 import org.eclipse.swt.widgets.Menu;
 import org.eclipse.swt.widgets.Table;
 import org.eclipse.swt.widgets.TableItem;
 import org.eclipse.swt.widgets.Widget;

 import org.eclipse.jface.action.IAction;
 import org.eclipse.jface.action.IMenuListener;
 import org.eclipse.jface.action.IMenuManager;
 import org.eclipse.jface.action.IToolBarManager;
 import org.eclipse.jface.action.MenuManager;
 import org.eclipse.jface.action.Separator;
 import org.eclipse.jface.util.Assert;
 import org.eclipse.jface.viewers.ILabelProvider;
 import org.eclipse.jface.viewers.IOpenListener;
 import org.eclipse.jface.viewers.ISelection;
 import org.eclipse.jface.viewers.ISelectionChangedListener;
 import org.eclipse.jface.viewers.IStructuredSelection;
 import org.eclipse.jface.viewers.OpenEvent;
 import org.eclipse.jface.viewers.SelectionChangedEvent;
 import org.eclipse.jface.viewers.StructuredSelection;
 import org.eclipse.jface.viewers.TableViewer;

 import org.eclipse.ui.IActionBars;
 import org.eclipse.ui.IMemento;
 import org.eclipse.ui.IWorkbenchActionConstants;
 import org.eclipse.ui.PlatformUI;
 import org.eclipse.ui.actions.ActionContext;
 import org.eclipse.ui.actions.ActionGroup;

 import org.eclipse.search.ui.IActionGroupFactory;
 import org.eclipse.search.ui.IContextMenuConstants;
 import org.eclipse.search.ui.IContextMenuContributor;
 import org.eclipse.search.ui.ISearchResultViewEntry;

 import org.eclipse.search.internal.ui.util.FileLabelProvider;


 /**
  * A special viewer to present search results. The viewer implements an
  * optimized adding and removing strategy. Furthermore it manages
  * contributions for search result types. For example the viewer's context
  * menu differs if the search result has been generated by a text or
  * a java search.
  */
 public class SearchResultViewer extends TableViewer {

 	private SearchResultView fOuterPart;
 	private boolean fFirstTime= true;
 	private ShowNextResultAction fShowNextResultAction;
 	private ShowPreviousResultAction fShowPreviousResultAction;
 	private GotoMarkerAction fGotoMarkerAction;
 	private SearchAgainAction fSearchAgainAction;
 	private RemoveAllSearchesAction fRemoveAllSearchesAction;
 	private RemoveMatchAction fRemoveMatchAction;
 	private SortDropDownAction fSortDropDownAction;
 	private SearchDropDownAction fSearchDropDownAction;
 	private CopyToClipboardAction fCopyToClipboardAction;
 	private int fMarkerToShow;
 	private boolean fHandleSelectionChangedEvents= true;
 	private ISelection fLastSelection;
 	private boolean fCurrentMatchRemoved= false;
 	private Color fPotentialMatchFgColor;
 	private ActionGroup fActionGroup;

 	/*
 	 * These static fields will go away when support for
 	 * multiple search will be implemented
 	 */
 	private static IContextMenuContributor fgContextMenuContributor;
 	private static IActionGroupFactory fgActionGroupFactory;
 	private static IAction fgGotoMarkerAction;

 	public SearchResultViewer(SearchResultView outerPart, Composite parent) {
 		super(new Table(parent, SWT.MULTI | SWT.H_SCROLL | SWT.V_SCROLL | SWT.FULL_SELECTION));

 		fOuterPart= outerPart;
 		Assert.isNotNull(fOuterPart);

 		if (SearchPreferencePage.arePotentialMatchesEmphasized())
 			fPotentialMatchFgColor= new Color(SearchPlugin.getDefault().getActiveWorkbenchShell().getDisplay(), SearchPreferencePage.getPotentialMatchBackgroundColor());

 		setUseHashlookup(true);
 		setContentProvider(new SearchResultContentProvider());
 		setLabelProvider(new SearchResultLabelProvider(new FileLabelProvider(FileLabelProvider.SHOW_LABEL), PlatformUI.getWorkbench().getDecoratorManager().getLabelDecorator()));

 		boolean hasSearch= SearchManager.getDefault().getCurrentSearch() != null;


 		fShowNextResultAction= new ShowNextResultAction(this);
 		fShowNextResultAction.setEnabled(false);
 		fShowPreviousResultAction= new ShowPreviousResultAction(this);
 		fShowPreviousResultAction.setEnabled(false);
 		fGotoMarkerAction= new GotoMarkerAction(this);
 		fGotoMarkerAction.setEnabled(false);
 		fRemoveMatchAction= new RemoveMatchAction(this);
 		fRemoveMatchAction.setEnabled(false);
 		fRemoveAllSearchesAction= new RemoveAllSearchesAction();
 		fSearchAgainAction= new SearchAgainAction();
 		fSearchAgainAction.setEnabled(hasSearch);
 		fRemoveAllSearchesAction.setEnabled(hasSearch);
 		fSortDropDownAction = new SortDropDownAction(this);
 		fSortDropDownAction.setEnabled(getItemCount() > 0);
 		fSearchDropDownAction= new SearchDropDownAction(this);
 		fSearchDropDownAction.setEnabled(hasSearch);
 		fCopyToClipboardAction= new CopyToClipboardAction(this);

 		addSelectionChangedListener(
 			new ISelectionChangedListener() {
 				public void selectionChanged(SelectionChangedEvent event) {
 					if (fLastSelection == null || !fLastSelection.equals(event.getSelection())) {
 						fLastSelection= event.getSelection();
 						handleSelectionChanged();
 					}
 				}
 			}
 		);

 		addOpenListener(new IOpenListener() {
 			public void open(OpenEvent event) {
 				showResult();
 			}
 		});

 		MenuManager menuMgr= new MenuManager("#PopUp"); //$NON-NLS-1$
 		menuMgr.setRemoveAllWhenShown(true);
 		menuMgr.addMenuListener(
 			new IMenuListener() {
 				public void menuAboutToShow(IMenuManager mgr) {
 					SearchPlugin.createStandardGroups(mgr);
 					fillContextMenu(mgr);
 				}
 			});
 		Menu menu= menuMgr.createContextMenu(getTable());
 		getTable().setMenu(menu);

 		// Register menu
 		fOuterPart.getSite().registerContextMenu(menuMgr, this);

 		IActionBars actionBars= fOuterPart.getViewSite().getActionBars();
 		if (actionBars != null)
 			actionBars.setGlobalActionHandler(IWorkbenchActionConstants.NEXT, fShowNextResultAction);
 			actionBars.setGlobalActionHandler(IWorkbenchActionConstants.PREVIOUS, fShowPreviousResultAction);
 	}

 	/**
 	 * @see StructuredViewer#doUpdateItem(Widget, Object, boolean)
 	 */
 	protected void doUpdateItem(Widget item, Object element, boolean fullMap) {
 		super.doUpdateItem(item, element, fullMap);
 		if (((SearchResultViewEntry)element).isPotentialMatch()) {
 		    TableItem ti = (TableItem) item;
 		    ti.setForeground(fPotentialMatchFgColor);
 		}
 	}

 	private void handleSelectionChanged() {

 		int selectionCount= getSelectedEntriesCount();
 		boolean hasSingleSelection= selectionCount == 1;
 		boolean hasElements= getItemCount() > 0;
 		fShowNextResultAction.setEnabled(hasSingleSelection || (hasElements && selectionCount == 0));
 		fShowPreviousResultAction.setEnabled(hasSingleSelection || (hasElements && selectionCount == 0));
 		fGotoMarkerAction.setEnabled(hasSingleSelection);
 		fRemoveMatchAction.setEnabled(hasSingleSelection);

 		if (fHandleSelectionChangedEvents) {
 			fMarkerToShow= -1;
 			fCurrentMatchRemoved= false;
 		} else
 			fHandleSelectionChangedEvents= true;

 		updateStatusLine();
 	}

 	void updateStatusLine() {
 		boolean hasSingleSelection= getSelectedEntriesCount() == 1;
 		String location= ""; //$NON-NLS-1$
 		if (hasSingleSelection) {
 			ISearchResultViewEntry entry= (ISearchResultViewEntry)getTable().getItem(getTable().getSelectionIndex()).getData();
 			IPath path= entry.getResource().getFullPath();
 			if (path != null)
 				location= path.makeRelative().toString();
 		}
 		setStatusLineMessage(location);
 	}

 	void enableActions() {
 		/*
 		 * Note: The check before each set operation reduces flickering
 		 */
 		boolean state= getItemCount() > 0;
 		if (state != fShowNextResultAction.isEnabled())
 			fShowNextResultAction.setEnabled(state);
 		if (state != fShowPreviousResultAction.isEnabled())
 			fShowPreviousResultAction.setEnabled(state);
 		if (state != fSortDropDownAction.isEnabled())
 			fSortDropDownAction.setEnabled(state);

 		state= SearchManager.getDefault().getCurrentSearch() != null;
 		if (state != fRemoveAllSearchesAction.isEnabled())
 			fRemoveAllSearchesAction.setEnabled(state);
 		if (state != fSearchDropDownAction.isEnabled())
 			fSearchDropDownAction.setEnabled(state);
 		if (state != fSearchAgainAction.isEnabled())
 			fSearchAgainAction.setEnabled(state);

 		state= !getSelection().isEmpty();
 		if (state != fGotoMarkerAction.isEnabled())
 			fGotoMarkerAction.setEnabled(state);
 		if (state != fRemoveMatchAction.isEnabled())
 			fRemoveMatchAction.setEnabled(state);
 	}


 	protected void inputChanged(Object input, Object oldInput) {
 		fLastSelection= null;
 		getTable().removeAll();
 		super.inputChanged(input, oldInput);
 		fMarkerToShow= -1;
 		fCurrentMatchRemoved= false;
 		updateTitle();
 		enableActions();
 		if (getItemCount() > 0)
 			selectResult(getTable(), 0);
 	}

 	protected int getSelectedEntriesCount() {
 		ISelection s= getSelection();
 		if (s == null || s.isEmpty() || !(s instanceof IStructuredSelection))
 			return 0;
 		IStructuredSelection selection= (IStructuredSelection)s;
 		return selection.size();
 	}

 	//--- Contribution management -----------------------------------------------


 	protected boolean enableRemoveMatchMenuItem() {
 		if (getSelectedEntriesCount() != 1)
 			return false;
 		Table table= getTable();
 		int index= table.getSelectionIndex();
 		SearchResultViewEntry entry= null;
 		if (index > -1)
 			entry= (SearchResultViewEntry)table.getItem(index).getData();
 		return (entry != null && entry.getMatchCount() > 1);

 	}

 	void fillContextMenu(IMenuManager menu) {
 		ISelection selection= getSelection();

 		if (fActionGroup != null) {
 			ActionContext context= new ActionContext(selection);
 			context.setInput(getInput());
 			fActionGroup.setContext(context);
 			fActionGroup.fillContextMenu(menu);
 			fActionGroup.setContext(null);
 		}

 		if (fgContextMenuContributor != null)
 			fgContextMenuContributor.fill(menu, this);

 		if (!selection.isEmpty()) {
 			menu.appendToGroup(IContextMenuConstants.GROUP_ADDITIONS, fCopyToClipboardAction);
 			menu.appendToGroup(IContextMenuConstants.GROUP_GOTO, fGotoMarkerAction);
 			if (enableRemoveMatchMenuItem())
 				menu.appendToGroup(IContextMenuConstants.GROUP_REORGANIZE, fRemoveMatchAction);
 			menu.appendToGroup(IContextMenuConstants.GROUP_REORGANIZE, new RemoveResultAction(this));
 		}

 		// If we have elements
 		if (getItemCount() > 0)
 			menu.appendToGroup(IContextMenuConstants.GROUP_REORGANIZE, new RemoveAllResultsAction());

 		menu.appendToGroup(IContextMenuConstants.GROUP_VIEWER_SETUP, fSearchAgainAction);
 		if (!selection.isEmpty())
 			menu.appendToGroup(IContextMenuConstants.GROUP_VIEWER_SETUP, fSortDropDownAction);
 	}


 	IAction getGotoMarkerAction() {
 		// null as return value is covered (no action will take place)
 		return fgGotoMarkerAction;
 	}

 	void setGotoMarkerAction(IAction gotoMarkerAction) {
 		fgGotoMarkerAction= gotoMarkerAction;
 	}


 	void setContextMenuTarget(IContextMenuContributor contributor) {
 		fgContextMenuContributor= contributor;
 	}

 	void setActionGroupFactory(IActionGroupFactory groupFactory) {
 		IActionBars actionBars= fOuterPart.getViewSite().getActionBars();
 		if (fActionGroup != null) {
 			fActionGroup.dispose();
 			fActionGroup= null;
 		}

 		if (groupFactory != null) {
 			fActionGroup= groupFactory.createActionGroup(fOuterPart);
 			if (actionBars != null)
 				fActionGroup.fillActionBars(actionBars);
 		}
 		if (actionBars != null)
 			actionBars.updateActionBars();
 	}

 	void setPageId(String pageId) {
 		fSortDropDownAction.setPageId(pageId);
 		ILabelProvider labelProvider= fOuterPart.getLabelProvider(pageId);
 		if (labelProvider != null)
 			internalSetLabelProvider(labelProvider);
 	}

 	void fillToolBar(IToolBarManager tbm) {
 		tbm.add(fShowNextResultAction);
 		tbm.add(fShowPreviousResultAction);
 //		tbm.add(fGotoMarkerAction); see bug 15275
 		tbm.add(fRemoveMatchAction);
 		tbm.add(new Separator());
 		tbm.add(new OpenSearchDialogAction());
 		tbm.add(fRemoveAllSearchesAction);
 		tbm.add(fSearchDropDownAction);

 		// need to hook F5 to table
 		getTable().addKeyListener(new KeyAdapter() {
 			public void keyReleased(KeyEvent e) {
 				if (e.keyCode == SWT.F5) {
 					fSearchAgainAction.run();
 					return;	// performance
 				}
 				if (e.character == SWT.DEL) {
 					new RemoveResultAction(SearchResultViewer.this).run();
 					return; // performance
 				}
 			}
 		});
 	}

 	int getItemCount() {
 		return SearchManager.getDefault().getCurrentItemCount();
 	}

 	void internalSetLabelProvider(ILabelProvider provider) {
 		setLabelProvider(new SearchResultLabelProvider(provider, PlatformUI.getWorkbench().getDecoratorManager().getLabelDecorator()));
 	}

 	/**
 	 * Makes the first marker of the current result entry
 	 * visible in an editor. If no result
 	 * is visible, this method does nothing.
 	 */
 	public void showResult() {
 		Table table= getTable();
 		if (!canDoShowResult(table))
 			return;


 		int index= table.getSelectionIndex();
 		if (index < 0)
 			return;
 		SearchResultViewEntry entry= (SearchResultViewEntry)getTable().getItem(index).getData();


 		fMarkerToShow= 0;
 		fCurrentMatchRemoved= false;
 		entry.setSelectedMarkerIndex(0);
 		openCurrentSelection();
 	}


 	/**
 	 * Makes the next result (marker) visible in an editor. If no result
 	 * is visible, this method makes the first result visible.
 	 */
 	public void showNextResult() {
 		Table table= getTable();
 		if (!canDoShowResult(table))
 			return;

 		int index= table.getSelectionIndex();
 		SearchResultViewEntry entry= null;
 		if (index > -1)
 			entry= (SearchResultViewEntry)table.getItem(index).getData();

 		if (fCurrentMatchRemoved)
 			fCurrentMatchRemoved= false;
 		else
 			fMarkerToShow++;
 		if (entry == null || fMarkerToShow >= entry.getMatchCount()) {
 			// move selection
 			if (index == -1) {
 				index= 0;
 			} else {
 				index++;
 				if (index >= table.getItemCount())
 					index= 0;
 			}
 			fMarkerToShow= 0;
 			entry= (SearchResultViewEntry)getTable().getItem(index).getData();
 			selectResult(table, index);
 		}
 		entry.setSelectedMarkerIndex(fMarkerToShow);
 		openCurrentSelection();
 		updateStatusLine();
 	}


 	/**
 	 * Makes the previous result (marker) visible. If there isn't any
 	 * visible result, this method makes the last result visible.
 	 */
 	public void showPreviousResult() {
 		fCurrentMatchRemoved= false;
 		Table table= getTable();
 		if (!canDoShowResult(table))
 			return;

 		int index= table.getSelectionIndex();
 		SearchResultViewEntry entry;


 		fMarkerToShow--;
 		if (fMarkerToShow >= 0)
 			entry= (SearchResultViewEntry)getTable().getItem(getTable().getSelectionIndex()).getData();
 		else {
 			// move selection
 			int count= table.getItemCount();
 			if (index == -1) {
 				index= count - 1;
 			} else {
 				index--;
 				if (index < 0)
 					index= count - 1;
 			}
 			entry= (SearchResultViewEntry)getTable().getItem(index).getData();
 			fMarkerToShow= entry.getMatchCount() - 1;
 			selectResult(table, index);
 		}
 		entry.setSelectedMarkerIndex(fMarkerToShow);
 		openCurrentSelection();
 		updateStatusLine();
 	}

 	private boolean canDoShowResult(Table table) {
 		if (table == null || getItemCount() == 0)
 			return false;
 		return true;
 	}

 	private void selectResult(Table table, int index) {
 		fHandleSelectionChangedEvents= false;
 		Object element= getElementAt(index);
 		if (element != null)
 			setSelection(new StructuredSelection(getElementAt(index)), true);
 		else
 			setSelection(StructuredSelection.EMPTY);
 	}

 	private void openCurrentSelection() {
 		IAction action= getGotoMarkerAction();
 		if (action != null)
 			action.run();
 	}

 	/**
 	 * Updates the background color for potential matches.
 	 */
 	void updatedPotentialMatchBgColor() {
 		if (fPotentialMatchFgColor != null)
 			fPotentialMatchFgColor.dispose();
 		fPotentialMatchFgColor= null;
 		if (SearchPreferencePage.arePotentialMatchesEmphasized())
 			fPotentialMatchFgColor= new Color(SearchPlugin.getDefault().getActiveWorkbenchShell().getDisplay(), SearchPreferencePage.getPotentialMatchBackgroundColor());
 		refresh();
 	}

 	/**
 	 * Update the title
 	 */
 	protected void updateTitle() {
 		boolean hasCurrentSearch= SearchManager.getDefault().getCurrentSearch() != null;
 		String title;
 		if (hasCurrentSearch) {
 			String description= SearchManager.getDefault().getCurrentSearch().getFullDescription();
 			title= SearchMessages.getFormattedString("SearchResultView.titleWithDescription", description); //$NON-NLS-1$
 		} else
 			title= SearchMessages.getString("SearchResultView.title"); //$NON-NLS-1$
 		if (title == null || !title.equals(fOuterPart.getTitle()))
 			fOuterPart.setTitle(title);
 	}

 	/**
 	 * Clear the title
 	 */
 	protected void clearTitle() {
 		String title= SearchMessages.getString("SearchResultView.title"); //$NON-NLS-1$
 		if (title == null || !title.equals(fOuterPart.getTitle()))
 			fOuterPart.setTitle(title);
 	}

 	/**
 	 * Sets the message text to be displayed on the status line.
 	 * The image on the status line is cleared.
 	 */
 	private void setStatusLineMessage(String message) {
 		fOuterPart.getViewSite().getActionBars().getStatusLineManager().setMessage(message);
 	}


 	protected void handleDispose(DisposeEvent event) {
 		fLastSelection= null;
 		Menu menu= getTable().getMenu();
 		if (menu != null)
 			menu.dispose();
 		if (fPotentialMatchFgColor != null)
 			fPotentialMatchFgColor.dispose();
 		if (fActionGroup != null) {
 			fActionGroup.dispose();
 			fActionGroup= null;
 		}
 		super.handleDispose(event);
 	}

 	//--- Change event handling -------------------------------------------------

 	/**
 	 * Handle a single add.
 	 */
 	protected void handleAddMatch(ISearchResultViewEntry entry) {
 		insert(entry, -1);
 	}

 	/**
 	 * Handle a single remove.
 	 */
 	protected void handleRemoveMatch(ISearchResultViewEntry entry) {
 		Widget item= findItem(entry);
 		if (entry.getMatchCount() == 0)
 			remove(entry);
 		else
 			updateItem(item, entry);
 		updateStatusLine();
 	}

 	/**
 	 * Handle remove all.
 	 */
 	protected void handleRemoveAll() {
 		setInput(null);
 	}

 	/**
 	 * Handle an update of an entry.
 	 */
 	protected void handleUpdateMatch(ISearchResultViewEntry entry, boolean matchRemoved) {
 		Widget item= findItem(entry);
 		updateItem(item, entry);
 		if (matchRemoved && getSelectionFromWidget().contains(entry))
 			fCurrentMatchRemoved= true;
 	}

 	//--- Persistency -------------------------------------------------

 	void restoreState(IMemento memento) {
 		fSortDropDownAction.restoreState(memento);
 	}

 	void saveState(IMemento memento) {
 		fSortDropDownAction.saveState(memento);
 	}
 }
	/*
	* (c) Copyright IBM Corp. 2000, 2001.
	* All Rights Reserved.
	*/
	package org.eclipse.search.internal.ui;


	import org.eclipse.core.runtime.IPath;

	import org.eclipse.swt.SWT;
	import org.eclipse.swt.events.DisposeEvent;
	import org.eclipse.swt.events.KeyAdapter;
	import org.eclipse.swt.events.KeyEvent;
	import org.eclipse.swt.graphics.Color;
	import org.eclipse.swt.widgets.Composite;
	import org.eclipse.swt.widgets.Menu;
	import org.eclipse.swt.widgets.Table;
	import org.eclipse.swt.widgets.TableItem;
	import org.eclipse.swt.widgets.Widget;

	import org.eclipse.jface.action.IAction;
	import org.eclipse.jface.action.IMenuListener;
	import org.eclipse.jface.action.IMenuManager;
	import org.eclipse.jface.action.IToolBarManager;
	import org.eclipse.jface.action.MenuManager;
	import org.eclipse.jface.action.Separator;
	import org.eclipse.jface.util.Assert;
	import org.eclipse.jface.viewers.ILabelProvider;
	import org.eclipse.jface.viewers.IOpenListener;
	import org.eclipse.jface.viewers.ISelection;
	import org.eclipse.jface.viewers.ISelectionChangedListener;
	import org.eclipse.jface.viewers.IStructuredSelection;
	import org.eclipse.jface.viewers.OpenEvent;
	import org.eclipse.jface.viewers.SelectionChangedEvent;
	import org.eclipse.jface.viewers.StructuredSelection;
	import org.eclipse.jface.viewers.TableViewer;

	import org.eclipse.ui.IActionBars;
	import org.eclipse.ui.IMemento;
	import org.eclipse.ui.IWorkbenchActionConstants;
	import org.eclipse.ui.PlatformUI;
	import org.eclipse.ui.actions.ActionContext;
	import org.eclipse.ui.actions.ActionGroup;

	import org.eclipse.search.ui.IActionGroupFactory;
	import org.eclipse.search.ui.IContextMenuConstants;
	import org.eclipse.search.ui.IContextMenuContributor;
	import org.eclipse.search.ui.ISearchResultViewEntry;

	import org.eclipse.search.internal.ui.util.FileLabelProvider;


	/**
	* A special viewer to present search results. The viewer implements an
	* optimized adding and removing strategy. Furthermore it manages
	* contributions for search result types. For example the viewer's context
	* menu differs if the search result has been generated by a text or
	* a java search.
	*/
	public class SearchResultViewer extends TableViewer {

	private SearchResultView fOuterPart;
	private boolean fFirstTime= true;
	private ShowNextResultAction fShowNextResultAction;
	private ShowPreviousResultAction fShowPreviousResultAction;
	private GotoMarkerAction fGotoMarkerAction;
	private SearchAgainAction fSearchAgainAction;
	private RemoveAllSearchesAction fRemoveAllSearchesAction;
	private RemoveMatchAction fRemoveMatchAction;
	private SortDropDownAction fSortDropDownAction;
	private SearchDropDownAction fSearchDropDownAction;
	private CopyToClipboardAction fCopyToClipboardAction;
	private int fMarkerToShow;
	private boolean fHandleSelectionChangedEvents= true;
	private ISelection fLastSelection;
	private boolean fCurrentMatchRemoved= false;
	private Color fPotentialMatchFgColor;
	private ActionGroup fActionGroup;

	/*
	* These static fields will go away when support for
	* multiple search will be implemented
	*/
	private static IContextMenuContributor fgContextMenuContributor;
	private static IActionGroupFactory fgActionGroupFactory;
	private static IAction fgGotoMarkerAction;

	public SearchResultViewer(SearchResultView outerPart, Composite parent) {
	super(new Table(parent, SWT.MULTI \| SWT.H_SCROLL \| SWT.V_SCROLL \| SWT.FULL_SELECTION));

	fOuterPart= outerPart;
	Assert.isNotNull(fOuterPart);

	if (SearchPreferencePage.arePotentialMatchesEmphasized())
	fPotentialMatchFgColor= new Color(SearchPlugin.getDefault().getActiveWorkbenchShell().getDisplay(), SearchPreferencePage.getPotentialMatchBackgroundColor());

	setUseHashlookup(true);
	setContentProvider(new SearchResultContentProvider());
	setLabelProvider(new SearchResultLabelProvider(new FileLabelProvider(FileLabelProvider.SHOW_LABEL), PlatformUI.getWorkbench().getDecoratorManager().getLabelDecorator()));

	boolean hasSearch= SearchManager.getDefault().getCurrentSearch() != null;


	fShowNextResultAction= new ShowNextResultAction(this);
	fShowNextResultAction.setEnabled(false);
	fShowPreviousResultAction= new ShowPreviousResultAction(this);
	fShowPreviousResultAction.setEnabled(false);
	fGotoMarkerAction= new GotoMarkerAction(this);
	fGotoMarkerAction.setEnabled(false);
	fRemoveMatchAction= new RemoveMatchAction(this);
	fRemoveMatchAction.setEnabled(false);
	fRemoveAllSearchesAction= new RemoveAllSearchesAction();
	fSearchAgainAction= new SearchAgainAction();
	fSearchAgainAction.setEnabled(hasSearch);
	fRemoveAllSearchesAction.setEnabled(hasSearch);
	fSortDropDownAction = new SortDropDownAction(this);
	fSortDropDownAction.setEnabled(getItemCount() > 0);
	fSearchDropDownAction= new SearchDropDownAction(this);
	fSearchDropDownAction.setEnabled(hasSearch);
	fCopyToClipboardAction= new CopyToClipboardAction(this);

	addSelectionChangedListener(
	new ISelectionChangedListener() {
	public void selectionChanged(SelectionChangedEvent event) {
	if (fLastSelection == null \|\| !fLastSelection.equals(event.getSelection())) {
	fLastSelection= event.getSelection();
	handleSelectionChanged();
	}
	}
	}
	);

	addOpenListener(new IOpenListener() {
	public void open(OpenEvent event) {
	showResult();
	}
	});

	MenuManager menuMgr= new MenuManager("#PopUp"); //$NON-NLS-1$
	menuMgr.setRemoveAllWhenShown(true);
	menuMgr.addMenuListener(
	new IMenuListener() {
	public void menuAboutToShow(IMenuManager mgr) {
	SearchPlugin.createStandardGroups(mgr);
	fillContextMenu(mgr);
	}
	});
	Menu menu= menuMgr.createContextMenu(getTable());
	getTable().setMenu(menu);

	// Register menu
	fOuterPart.getSite().registerContextMenu(menuMgr, this);

	IActionBars actionBars= fOuterPart.getViewSite().getActionBars();
	if (actionBars != null)
	actionBars.setGlobalActionHandler(IWorkbenchActionConstants.NEXT, fShowNextResultAction);
	actionBars.setGlobalActionHandler(IWorkbenchActionConstants.PREVIOUS, fShowPreviousResultAction);
	}

	/**
	* @see StructuredViewer#doUpdateItem(Widget, Object, boolean)
	*/
	protected void doUpdateItem(Widget item, Object element, boolean fullMap) {
	super.doUpdateItem(item, element, fullMap);
	if (((SearchResultViewEntry)element).isPotentialMatch()) {
	TableItem ti = (TableItem) item;
	ti.setForeground(fPotentialMatchFgColor);
	}
	}

	private void handleSelectionChanged() {

	int selectionCount= getSelectedEntriesCount();
	boolean hasSingleSelection= selectionCount == 1;
	boolean hasElements= getItemCount() > 0;
	fShowNextResultAction.setEnabled(hasSingleSelection \|\| (hasElements && selectionCount == 0));
	fShowPreviousResultAction.setEnabled(hasSingleSelection \|\| (hasElements && selectionCount == 0));
	fGotoMarkerAction.setEnabled(hasSingleSelection);
	fRemoveMatchAction.setEnabled(hasSingleSelection);

	if (fHandleSelectionChangedEvents) {
	fMarkerToShow= -1;
	fCurrentMatchRemoved= false;
	} else
	fHandleSelectionChangedEvents= true;

	updateStatusLine();
	}

	void updateStatusLine() {
	boolean hasSingleSelection= getSelectedEntriesCount() == 1;
	String location= ""; //$NON-NLS-1$
	if (hasSingleSelection) {
	ISearchResultViewEntry entry= (ISearchResultViewEntry)getTable().getItem(getTable().getSelectionIndex()).getData();
	IPath path= entry.getResource().getFullPath();
	if (path != null)
	location= path.makeRelative().toString();
	}
	setStatusLineMessage(location);
	}

	void enableActions() {
	/*
	* Note: The check before each set operation reduces flickering
	*/
	boolean state= getItemCount() > 0;
	if (state != fShowNextResultAction.isEnabled())
	fShowNextResultAction.setEnabled(state);
	if (state != fShowPreviousResultAction.isEnabled())
	fShowPreviousResultAction.setEnabled(state);
	if (state != fSortDropDownAction.isEnabled())
	fSortDropDownAction.setEnabled(state);

	state= SearchManager.getDefault().getCurrentSearch() != null;
	if (state != fRemoveAllSearchesAction.isEnabled())
	fRemoveAllSearchesAction.setEnabled(state);
	if (state != fSearchDropDownAction.isEnabled())
	fSearchDropDownAction.setEnabled(state);
	if (state != fSearchAgainAction.isEnabled())
	fSearchAgainAction.setEnabled(state);

	state= !getSelection().isEmpty();
	if (state != fGotoMarkerAction.isEnabled())
	fGotoMarkerAction.setEnabled(state);
	if (state != fRemoveMatchAction.isEnabled())
	fRemoveMatchAction.setEnabled(state);
	}


	protected void inputChanged(Object input, Object oldInput) {
	fLastSelection= null;
	getTable().removeAll();
	super.inputChanged(input, oldInput);
	fMarkerToShow= -1;
	fCurrentMatchRemoved= false;
	updateTitle();
	enableActions();
	if (getItemCount() > 0)
	selectResult(getTable(), 0);
	}

	protected int getSelectedEntriesCount() {
	ISelection s= getSelection();
	if (s == null \|\| s.isEmpty() \|\| !(s instanceof IStructuredSelection))
	return 0;
	IStructuredSelection selection= (IStructuredSelection)s;
	return selection.size();
	}

	//--- Contribution management -----------------------------------------------


	protected boolean enableRemoveMatchMenuItem() {
	if (getSelectedEntriesCount() != 1)
	return false;
	Table table= getTable();
	int index= table.getSelectionIndex();
	SearchResultViewEntry entry= null;
	if (index > -1)
	entry= (SearchResultViewEntry)table.getItem(index).getData();
	return (entry != null && entry.getMatchCount() > 1);

	}

	void fillContextMenu(IMenuManager menu) {
	ISelection selection= getSelection();

	if (fActionGroup != null) {
	ActionContext context= new ActionContext(selection);
	context.setInput(getInput());
	fActionGroup.setContext(context);
	fActionGroup.fillContextMenu(menu);
	fActionGroup.setContext(null);
	}

	if (fgContextMenuContributor != null)
	fgContextMenuContributor.fill(menu, this);

	if (!selection.isEmpty()) {
	menu.appendToGroup(IContextMenuConstants.GROUP_ADDITIONS, fCopyToClipboardAction);
	menu.appendToGroup(IContextMenuConstants.GROUP_GOTO, fGotoMarkerAction);
	if (enableRemoveMatchMenuItem())
	menu.appendToGroup(IContextMenuConstants.GROUP_REORGANIZE, fRemoveMatchAction);
	menu.appendToGroup(IContextMenuConstants.GROUP_REORGANIZE, new RemoveResultAction(this));
	}

	// If we have elements
	if (getItemCount() > 0)
	menu.appendToGroup(IContextMenuConstants.GROUP_REORGANIZE, new RemoveAllResultsAction());

	menu.appendToGroup(IContextMenuConstants.GROUP_VIEWER_SETUP, fSearchAgainAction);
	if (!selection.isEmpty())
	menu.appendToGroup(IContextMenuConstants.GROUP_VIEWER_SETUP, fSortDropDownAction);
	}


	IAction getGotoMarkerAction() {
	// null as return value is covered (no action will take place)
	return fgGotoMarkerAction;
	}

	void setGotoMarkerAction(IAction gotoMarkerAction) {
	fgGotoMarkerAction= gotoMarkerAction;
	}


	void setContextMenuTarget(IContextMenuContributor contributor) {
	fgContextMenuContributor= contributor;
	}

	void setActionGroupFactory(IActionGroupFactory groupFactory) {
	IActionBars actionBars= fOuterPart.getViewSite().getActionBars();
	if (fActionGroup != null) {
	fActionGroup.dispose();
	fActionGroup= null;
	}

	if (groupFactory != null) {
	fActionGroup= groupFactory.createActionGroup(fOuterPart);
	if (actionBars != null)
	fActionGroup.fillActionBars(actionBars);
	}
	if (actionBars != null)
	actionBars.updateActionBars();
	}

	void setPageId(String pageId) {
	fSortDropDownAction.setPageId(pageId);
	ILabelProvider labelProvider= fOuterPart.getLabelProvider(pageId);
	if (labelProvider != null)
	internalSetLabelProvider(labelProvider);
	}

	void fillToolBar(IToolBarManager tbm) {
	tbm.add(fShowNextResultAction);
	tbm.add(fShowPreviousResultAction);
	// tbm.add(fGotoMarkerAction); see bug 15275
	tbm.add(fRemoveMatchAction);
	tbm.add(new Separator());
	tbm.add(new OpenSearchDialogAction());
	tbm.add(fRemoveAllSearchesAction);
	tbm.add(fSearchDropDownAction);

	// need to hook F5 to table
	getTable().addKeyListener(new KeyAdapter() {
	public void keyReleased(KeyEvent e) {
	if (e.keyCode == SWT.F5) {
	fSearchAgainAction.run();
	return; // performance
	}
	if (e.character == SWT.DEL) {
	new RemoveResultAction(SearchResultViewer.this).run();
	return; // performance
	}
	}
	});
	}

	int getItemCount() {
	return SearchManager.getDefault().getCurrentItemCount();
	}

	void internalSetLabelProvider(ILabelProvider provider) {
	setLabelProvider(new SearchResultLabelProvider(provider, PlatformUI.getWorkbench().getDecoratorManager().getLabelDecorator()));
	}

	/**
	* Makes the first marker of the current result entry
	* visible in an editor. If no result
	* is visible, this method does nothing.
	*/
	public void showResult() {
	Table table= getTable();
	if (!canDoShowResult(table))
	return;


	int index= table.getSelectionIndex();
	if (index < 0)
	return;
	SearchResultViewEntry entry= (SearchResultViewEntry)getTable().getItem(index).getData();


	fMarkerToShow= 0;
	fCurrentMatchRemoved= false;
	entry.setSelectedMarkerIndex(0);
	openCurrentSelection();
	}


	/**
	* Makes the next result (marker) visible in an editor. If no result
	* is visible, this method makes the first result visible.
	*/
	public void showNextResult() {
	Table table= getTable();
	if (!canDoShowResult(table))
	return;

	int index= table.getSelectionIndex();
	SearchResultViewEntry entry= null;
	if (index > -1)
	entry= (SearchResultViewEntry)table.getItem(index).getData();

	if (fCurrentMatchRemoved)
	fCurrentMatchRemoved= false;
	else
	fMarkerToShow++;
	if (entry == null \|\| fMarkerToShow >= entry.getMatchCount()) {
	// move selection
	if (index == -1) {
	index= 0;
	} else {
	index++;
	if (index >= table.getItemCount())
	index= 0;
	}
	fMarkerToShow= 0;
	entry= (SearchResultViewEntry)getTable().getItem(index).getData();
	selectResult(table, index);
	}
	entry.setSelectedMarkerIndex(fMarkerToShow);
	openCurrentSelection();
	updateStatusLine();
	}


	/**
	* Makes the previous result (marker) visible. If there isn't any
	* visible result, this method makes the last result visible.
	*/
	public void showPreviousResult() {
	fCurrentMatchRemoved= false;
	Table table= getTable();
	if (!canDoShowResult(table))
	return;

	int index= table.getSelectionIndex();
	SearchResultViewEntry entry;


	fMarkerToShow--;
	if (fMarkerToShow >= 0)
	entry= (SearchResultViewEntry)getTable().getItem(getTable().getSelectionIndex()).getData();
	else {
	// move selection
	int count= table.getItemCount();
	if (index == -1) {
	index= count - 1;
	} else {
	index--;
	if (index < 0)
	index= count - 1;
	}
	entry= (SearchResultViewEntry)getTable().getItem(index).getData();
	fMarkerToShow= entry.getMatchCount() - 1;
	selectResult(table, index);
	}
	entry.setSelectedMarkerIndex(fMarkerToShow);
	openCurrentSelection();
	updateStatusLine();
	}

	private boolean canDoShowResult(Table table) {
	if (table == null \|\| getItemCount() == 0)
	return false;
	return true;
	}

	private void selectResult(Table table, int index) {
	fHandleSelectionChangedEvents= false;
	Object element= getElementAt(index);
	if (element != null)
	setSelection(new StructuredSelection(getElementAt(index)), true);
	else
	setSelection(StructuredSelection.EMPTY);
	}

	private void openCurrentSelection() {
	IAction action= getGotoMarkerAction();
	if (action != null)
	action.run();
	}

	/**
	* Updates the background color for potential matches.
	*/
	void updatedPotentialMatchBgColor() {
	if (fPotentialMatchFgColor != null)
	fPotentialMatchFgColor.dispose();
	fPotentialMatchFgColor= null;
	if (SearchPreferencePage.arePotentialMatchesEmphasized())
	fPotentialMatchFgColor= new Color(SearchPlugin.getDefault().getActiveWorkbenchShell().getDisplay(), SearchPreferencePage.getPotentialMatchBackgroundColor());
	refresh();
	}

	/**
	* Update the title
	*/
	protected void updateTitle() {
	boolean hasCurrentSearch= SearchManager.getDefault().getCurrentSearch() != null;
	String title;
	if (hasCurrentSearch) {
	String description= SearchManager.getDefault().getCurrentSearch().getFullDescription();
	title= SearchMessages.getFormattedString("SearchResultView.titleWithDescription", description); //$NON-NLS-1$
	} else
	title= SearchMessages.getString("SearchResultView.title"); //$NON-NLS-1$
	if (title == null \|\| !title.equals(fOuterPart.getTitle()))
	fOuterPart.setTitle(title);
	}

	/**
	* Clear the title
	*/
	protected void clearTitle() {
	String title= SearchMessages.getString("SearchResultView.title"); //$NON-NLS-1$
	if (title == null \|\| !title.equals(fOuterPart.getTitle()))
	fOuterPart.setTitle(title);
	}

	/**
	* Sets the message text to be displayed on the status line.
	* The image on the status line is cleared.
	*/
	private void setStatusLineMessage(String message) {
	fOuterPart.getViewSite().getActionBars().getStatusLineManager().setMessage(message);
	}


	protected void handleDispose(DisposeEvent event) {
	fLastSelection= null;
	Menu menu= getTable().getMenu();
	if (menu != null)
	menu.dispose();
	if (fPotentialMatchFgColor != null)
	fPotentialMatchFgColor.dispose();
	if (fActionGroup != null) {
	fActionGroup.dispose();
	fActionGroup= null;
	}
	super.handleDispose(event);
	}

	//--- Change event handling -------------------------------------------------

	/**
	* Handle a single add.
	*/
	protected void handleAddMatch(ISearchResultViewEntry entry) {
	insert(entry, -1);
	}

	/**
	* Handle a single remove.
	*/
	protected void handleRemoveMatch(ISearchResultViewEntry entry) {
	Widget item= findItem(entry);
	if (entry.getMatchCount() == 0)
	remove(entry);
	else
	updateItem(item, entry);
	updateStatusLine();
	}

	/**
	* Handle remove all.
	*/
	protected void handleRemoveAll() {
	setInput(null);
	}

	/**
	* Handle an update of an entry.
	*/
	protected void handleUpdateMatch(ISearchResultViewEntry entry, boolean matchRemoved) {
	Widget item= findItem(entry);
	updateItem(item, entry);
	if (matchRemoved && getSelectionFromWidget().contains(entry))
	fCurrentMatchRemoved= true;
	}

	//--- Persistency -------------------------------------------------

	void restoreState(IMemento memento) {
	fSortDropDownAction.restoreState(memento);
	}

	void saveState(IMemento memento) {
	fSortDropDownAction.saveState(memento);
	}
	}