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

 /*******************************************************************************
  * Copyright (c) 2000, 2003 IBM Corporation and others.
  * All rights reserved. This program and the accompanying materials
  * are made available under the terms of the Common Public License v1.0
  * which accompanies this distribution, and is available at
  * http://www.eclipse.org/legal/cpl-v10.html
  *
  * Contributors:
  *     IBM Corporation - initial API and implementation
  *******************************************************************************/
 package org.eclipse.search.internal.ui;

 import java.net.URL;
 import java.util.ArrayList;
 import java.util.Arrays;
 import java.util.Iterator;
 import java.util.List;
 import java.util.StringTokenizer;

 import org.eclipse.core.resources.IFile;
 import org.eclipse.core.resources.IResource;
 import org.eclipse.core.runtime.CoreException;
 import org.eclipse.core.runtime.IAdaptable;
 import org.eclipse.core.runtime.IConfigurationElement;

 import org.eclipse.swt.SWT;
 import org.eclipse.swt.graphics.Point;

 import org.eclipse.jface.dialogs.IDialogSettings;
 import org.eclipse.jface.resource.ImageDescriptor;
 import org.eclipse.jface.resource.StringConverter;

 import org.eclipse.search.ui.ISearchPage;
 import org.eclipse.search.ui.ISearchPageScoreComputer;
 import org.eclipse.search.ui.ISearchResultViewEntry;

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

 /**
  * Proxy that represents a search page.
  */
 class SearchPageDescriptor implements Comparable {

 	public final static String PAGE_TAG= "page"; //$NON-NLS-1$
 	private final static String ID_ATTRIBUTE= "id"; //$NON-NLS-1$
 	private final static String ICON_ATTRIBUTE= "icon"; //$NON-NLS-1$
 	private final static String CLASS_ATTRIBUTE= "class"; //$NON-NLS-1$
 	private final static String LABEL_ATTRIBUTE= "label"; //$NON-NLS-1$
 	private final static String SIZE_ATTRIBUTE= "sizeHint"; //$NON-NLS-1$
 	private final static String TAB_POSITION_ATTRIBUTE= "tabPosition"; //$NON-NLS-1$
 	private final static String EXTENSIONS_ATTRIBUTE= "extensions"; //$NON-NLS-1$
 	private final static String SHOW_SCOPE_SECTION_ATTRIBUTE= "showScopeSection"; //$NON-NLS-1$
 	private final static String CAN_SEARCH_ENCLOSING_PROJECTS= "canSearchEnclosingProjects"; //$NON-NLS-1$
 	private final static String ENABLED_ATTRIBUTE= "enabled"; //$NON-NLS-1$
 	private final static String SEARCH_VIEW_HELP_CONTEXT_ID_ATTRIBUTE= "searchViewHelpContextId"; //$NON-NLS-1$

 	public final static Point UNKNOWN_SIZE= new Point(SWT.DEFAULT, SWT.DEFAULT);

 	// dialog store id constants
 	private final static String SECTION_ID= "Search"; //$NON-NLS-1$
 	private final static String STORE_ENABLED_PAGE_IDS= SECTION_ID + ".enabledPageIds"; //$NON-NLS-1$
 	private final static String STORE_PROCESSED_PAGE_IDS= SECTION_ID + ".processedPageIds"; //$NON-NLS-1$

 	private static List fgEnabledPageIds;

 	private static class ExtensionScorePair {
 		public String extension;
 		public int score;
 		public ExtensionScorePair(String extension, int score) {
 			this.extension= extension;
 			this.score= score;
 		}
 	}

 	private IConfigurationElement fElement;
 	private List fExtensionScorePairs;
 	private int fWildcardScore= ISearchPageScoreComputer.UNKNOWN;

 	/**
 	 * Creates a new search page node with the given configuration element.
 	 */
 	public SearchPageDescriptor(IConfigurationElement element) {
 		fElement= element;
 	}

 	/**
 	 * Creates a new search page from this node.
 	 */
 	public ISearchPage createObject() {
 		ISearchPage result= null;
 		try {
 			result= (ISearchPage)fElement.createExecutableExtension(CLASS_ATTRIBUTE);
 		} catch (CoreException ex) {
 			ExceptionHandler.handle(ex, SearchMessages.getString("Search.Error.createSearchPage.title"), SearchMessages.getString("Search.Error.createSearchPage.message")); //$NON-NLS-2$ //$NON-NLS-1$
 		} catch (ClassCastException ex) {
 			ExceptionHandler.displayMessageDialog(ex, SearchMessages.getString("Search.Error.createSearchPage.title"), SearchMessages.getString("Search.Error.createSearchPage.message")); //$NON-NLS-2$ //$NON-NLS-1$
 			return null;
 		}
 		if (result != null) {
 			result.setTitle(getLabel());
 		}
 		return result;
 	}

 	//---- XML Attribute accessors ---------------------------------------------

 	/**
 	 * Returns the page's id.
 	 */
 	public String getId() {
 		return fElement.getAttribute(ID_ATTRIBUTE);
 	}

 	/**
 	 * Returns the page's image
 	 */
 	public ImageDescriptor getImage() {
 		String imageName= fElement.getAttribute(ICON_ATTRIBUTE);
 		if (imageName == null)
 			return null;
 		URL url;
 		try {
 			url= new URL(fElement.getDeclaringExtension().getDeclaringPluginDescriptor().getInstallURL(), imageName);
 		} catch (java.net.MalformedURLException ex) {
 			ExceptionHandler.log(ex, SearchMessages.getString("Search.Error.createSearchPage.message")); //$NON-NLS-1$
 			return null;
 		}
 		return ImageDescriptor.createFromURL(url);
 	}

 	/**
 	 * Returns the page's label.
 	 */
 	public String getLabel() {
 		return fElement.getAttribute(LABEL_ATTRIBUTE);
 	}

 	/**
 	 * Returns <code>true</code> if the scope section needs
 	 * to be shown in the dialog.
 	 */
 	public boolean showScopeSection() {
 		return Boolean.valueOf(fElement.getAttribute(SHOW_SCOPE_SECTION_ATTRIBUTE)).booleanValue();
 	}

 	/**
 	 * Returns <code>true</code> if the page is initially
 	 * shown in the Search dialog.
 	 *
 	 * This attribute is optional and defaults to <code>true</code>.
 	 */
 	public boolean isInitiallyEnabled() {
 		String strVal= fElement.getAttribute(ENABLED_ATTRIBUTE);
 		return strVal == null || Boolean.valueOf(strVal).booleanValue();
 	}

 	/**
 	 * Returns <code>true</code> if the page can handle
 	 * searches in enclosing projects. The value should be ignored if <code>showScopeSection()</code>
 	 * returns <code>false</code>.
 	 *
 	 * This attribute is optional and defaults to <code>false</code>.
 	 */
 	public boolean canSearchInProjects() {
 		return Boolean.valueOf(fElement.getAttribute(CAN_SEARCH_ENCLOSING_PROJECTS)).booleanValue();
 	}

 	/**
 	 * Returns the page's preferred size
 	 */
 	public Point getPreferredSize() {
 		return StringConverter.asPoint(
 			fElement.getAttribute(SIZE_ATTRIBUTE), UNKNOWN_SIZE);
 	}

 	/**
 	 * Returns the page's tab position relative to the other tabs.
 	 * @return	the tab position or <code>Integer.MAX_VALUE</code> if not defined in
 	 *			the plugins.xml file
 	 */
 	public int getTabPosition() {
 		int position= Integer.MAX_VALUE / 2;
 		String str= fElement.getAttribute(TAB_POSITION_ATTRIBUTE);
 		if (str != null)
 			try {
 				position= Integer.parseInt(str);
 		} catch (NumberFormatException ex) {
 			ExceptionHandler.log(ex, SearchMessages.getString("Search.Error.createSearchPage.message")); //$NON-NLS-1$
 			// position is Integer.MAX_VALUE;
 		}
 		return position;
 	}

 	boolean isEnabled() {
 		return getEnabledPageIds().contains(getId());
 	}

 	/**
 	 * Returns the help context for help shown in search view.
 	 *
 	 * @return the help context id or <code>null</code> if not defined
 	 */
 	public String getSearchViewHelpContextId() {
 		return fElement.getAttribute(SEARCH_VIEW_HELP_CONTEXT_ID_ATTRIBUTE);
 	}

 	static void setEnabled(Object[] enabledDescriptors) {
 		fgEnabledPageIds= new ArrayList(5);
 		for (int i= 0; i < enabledDescriptors.length; i++) {
 			if (enabledDescriptors[i] instanceof SearchPageDescriptor)
 				fgEnabledPageIds.add(((SearchPageDescriptor)enabledDescriptors[i]).getId());
 		}
 		storeEnabledPageIds();
 	}

 	private static List getEnabledPageIds() {
 		if (fgEnabledPageIds == null) {
 			List descriptors= SearchPlugin.getDefault().getSearchPageDescriptors();

 			String[] enabledPageIds= getDialogSettings().getArray(STORE_ENABLED_PAGE_IDS);
 			if (enabledPageIds == null)
 				fgEnabledPageIds= new ArrayList(descriptors.size());
 			else
 				fgEnabledPageIds= new ArrayList(Arrays.asList(enabledPageIds));


 			List processedPageIds;
 			String[] processedPageIdsArr= getDialogSettings().getArray(STORE_PROCESSED_PAGE_IDS);
 			if (processedPageIdsArr == null)
 				processedPageIds= new ArrayList(descriptors.size());
 			else
 				processedPageIds= new ArrayList(Arrays.asList(processedPageIdsArr));

 			// Enable pages based on contribution
 			Iterator iter= descriptors.iterator();
 			while (iter.hasNext()) {
 				SearchPageDescriptor desc= (SearchPageDescriptor)iter.next();
 				if (processedPageIds.contains(desc.getId()))
 					continue;

 				processedPageIds.add(desc.getId());
 				if (desc.isInitiallyEnabled())
 					fgEnabledPageIds.add(desc.getId());
 			}

 			getDialogSettings().put(STORE_PROCESSED_PAGE_IDS, (String[])processedPageIds.toArray(new String[processedPageIds.size()]));
 			storeEnabledPageIds();
 		}
 		return fgEnabledPageIds;
 	}

 	private static void storeEnabledPageIds() {
 		getDialogSettings().put(STORE_ENABLED_PAGE_IDS, (String[])fgEnabledPageIds.toArray(new String[fgEnabledPageIds.size()]));
 		SearchPlugin.getDefault().savePluginPreferences();
 	}

 	private static IDialogSettings getDialogSettings() {
 		IDialogSettings settings= SearchPlugin.getDefault().getDialogSettings();
 		IDialogSettings section= settings.getSection(SECTION_ID);
 		if (section == null)
 			// create new section
 			section= settings.addNewSection(SECTION_ID);
 		return section;
 	}

 	/*
 	 * Implements a method from IComparable
 	 */
 	public int compareTo(Object o) {
 		int myPos= getTabPosition();
 		int objsPos= ((SearchPageDescriptor)o).getTabPosition();
 		if (myPos == Integer.MAX_VALUE && objsPos == Integer.MAX_VALUE || myPos == objsPos)
 			return getLabel().compareTo(((SearchPageDescriptor)o).getLabel());
 		else
 			return myPos - objsPos;
 	}

 	//---- Suitability tests ---------------------------------------------------

 	/**
 	 * Returns the score for this page with the given input element.
 	 */
 	public int computeScore(Object element) {
 		if (element instanceof IAdaptable) {
 			IResource resource= (IResource)((IAdaptable)element).getAdapter(IResource.class);
 			if (resource != null && resource.getType() == IResource.FILE) {
 				String extension= ((IFile)resource).getFileExtension();
 				if (extension != null)
 					return getScoreForFileExtension(extension);
 			} else {
 				ISearchPageScoreComputer tester=
 					(ISearchPageScoreComputer)((IAdaptable)element).getAdapter(ISearchPageScoreComputer.class);
 				if (tester != null)
 					return tester.computeScore(getId(), element);
 			}
 		} else if (element instanceof ISearchResultViewEntry) {
 			ISearchResultViewEntry entry= (ISearchResultViewEntry)element;
 			return computeScore(entry.getSelectedMarker());
 		}
 		if (fWildcardScore != ISearchPageScoreComputer.UNKNOWN)
 			return fWildcardScore;

 		return ISearchPageScoreComputer.LOWEST;
 	}

 	private int getScoreForFileExtension(String extension) {
 		if (fExtensionScorePairs == null)
 			readExtensionScorePairs();

 		int size= fExtensionScorePairs.size();
 		for (int i= 0; i < size; i++) {
 			ExtensionScorePair p= (ExtensionScorePair)fExtensionScorePairs.get(i);
 			if (extension.equals(p.extension))
 				return p.score;
 		}
 		if (fWildcardScore != ISearchPageScoreComputer.UNKNOWN)
 			return fWildcardScore;

 		return ISearchPageScoreComputer.LOWEST;
 	}

 	private void readExtensionScorePairs() {
 		fExtensionScorePairs= new ArrayList(3);
 		String content= fElement.getAttribute(EXTENSIONS_ATTRIBUTE);
 		if (content == null)
 			return;
 		StringTokenizer tokenizer= new StringTokenizer(content, ","); //$NON-NLS-1$
 		while (tokenizer.hasMoreElements()) {
 			String token= tokenizer.nextToken().trim();
 			int pos= token.indexOf(':');
 			if (pos != -1) {
 				String extension= token.substring(0, pos);
 				int score= StringConverter.asInt(token.substring(pos+1), ISearchPageScoreComputer.UNKNOWN);
 				if (extension.equals("*")) { //$NON-NLS-1$
 					fWildcardScore= score;
 				} else {
 					fExtensionScorePairs.add(new ExtensionScorePair(extension, score));
 				}
 			}
 		}
 	}
 }
	/*******************************************************************************
	* Copyright (c) 2000, 2003 IBM Corporation and others.
	* All rights reserved. This program and the accompanying materials
	* are made available under the terms of the Common Public License v1.0
	* which accompanies this distribution, and is available at
	* http://www.eclipse.org/legal/cpl-v10.html
	*
	* Contributors:
	* IBM Corporation - initial API and implementation
	*******************************************************************************/
	package org.eclipse.search.internal.ui;

	import java.net.URL;
	import java.util.ArrayList;
	import java.util.Arrays;
	import java.util.Iterator;
	import java.util.List;
	import java.util.StringTokenizer;

	import org.eclipse.core.resources.IFile;
	import org.eclipse.core.resources.IResource;
	import org.eclipse.core.runtime.CoreException;
	import org.eclipse.core.runtime.IAdaptable;
	import org.eclipse.core.runtime.IConfigurationElement;

	import org.eclipse.swt.SWT;
	import org.eclipse.swt.graphics.Point;

	import org.eclipse.jface.dialogs.IDialogSettings;
	import org.eclipse.jface.resource.ImageDescriptor;
	import org.eclipse.jface.resource.StringConverter;

	import org.eclipse.search.ui.ISearchPage;
	import org.eclipse.search.ui.ISearchPageScoreComputer;
	import org.eclipse.search.ui.ISearchResultViewEntry;

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

	/**
	* Proxy that represents a search page.
	*/
	class SearchPageDescriptor implements Comparable {

	public final static String PAGE_TAG= "page"; //$NON-NLS-1$
	private final static String ID_ATTRIBUTE= "id"; //$NON-NLS-1$
	private final static String ICON_ATTRIBUTE= "icon"; //$NON-NLS-1$
	private final static String CLASS_ATTRIBUTE= "class"; //$NON-NLS-1$
	private final static String LABEL_ATTRIBUTE= "label"; //$NON-NLS-1$
	private final static String SIZE_ATTRIBUTE= "sizeHint"; //$NON-NLS-1$
	private final static String TAB_POSITION_ATTRIBUTE= "tabPosition"; //$NON-NLS-1$
	private final static String EXTENSIONS_ATTRIBUTE= "extensions"; //$NON-NLS-1$
	private final static String SHOW_SCOPE_SECTION_ATTRIBUTE= "showScopeSection"; //$NON-NLS-1$
	private final static String CAN_SEARCH_ENCLOSING_PROJECTS= "canSearchEnclosingProjects"; //$NON-NLS-1$
	private final static String ENABLED_ATTRIBUTE= "enabled"; //$NON-NLS-1$
	private final static String SEARCH_VIEW_HELP_CONTEXT_ID_ATTRIBUTE= "searchViewHelpContextId"; //$NON-NLS-1$

	public final static Point UNKNOWN_SIZE= new Point(SWT.DEFAULT, SWT.DEFAULT);

	// dialog store id constants
	private final static String SECTION_ID= "Search"; //$NON-NLS-1$
	private final static String STORE_ENABLED_PAGE_IDS= SECTION_ID + ".enabledPageIds"; //$NON-NLS-1$
	private final static String STORE_PROCESSED_PAGE_IDS= SECTION_ID + ".processedPageIds"; //$NON-NLS-1$

	private static List fgEnabledPageIds;

	private static class ExtensionScorePair {
	public String extension;
	public int score;
	public ExtensionScorePair(String extension, int score) {
	this.extension= extension;
	this.score= score;
	}
	}

	private IConfigurationElement fElement;
	private List fExtensionScorePairs;
	private int fWildcardScore= ISearchPageScoreComputer.UNKNOWN;

	/**
	* Creates a new search page node with the given configuration element.
	*/
	public SearchPageDescriptor(IConfigurationElement element) {
	fElement= element;
	}

	/**
	* Creates a new search page from this node.
	*/
	public ISearchPage createObject() {
	ISearchPage result= null;
	try {
	result= (ISearchPage)fElement.createExecutableExtension(CLASS_ATTRIBUTE);
	} catch (CoreException ex) {
	ExceptionHandler.handle(ex, SearchMessages.getString("Search.Error.createSearchPage.title"), SearchMessages.getString("Search.Error.createSearchPage.message")); //$NON-NLS-2$ //$NON-NLS-1$
	} catch (ClassCastException ex) {
	ExceptionHandler.displayMessageDialog(ex, SearchMessages.getString("Search.Error.createSearchPage.title"), SearchMessages.getString("Search.Error.createSearchPage.message")); //$NON-NLS-2$ //$NON-NLS-1$
	return null;
	}
	if (result != null) {
	result.setTitle(getLabel());
	}
	return result;
	}

	//---- XML Attribute accessors ---------------------------------------------

	/**
	* Returns the page's id.
	*/
	public String getId() {
	return fElement.getAttribute(ID_ATTRIBUTE);
	}

	/**
	* Returns the page's image
	*/
	public ImageDescriptor getImage() {
	String imageName= fElement.getAttribute(ICON_ATTRIBUTE);
	if (imageName == null)
	return null;
	URL url;
	try {
	url= new URL(fElement.getDeclaringExtension().getDeclaringPluginDescriptor().getInstallURL(), imageName);
	} catch (java.net.MalformedURLException ex) {
	ExceptionHandler.log(ex, SearchMessages.getString("Search.Error.createSearchPage.message")); //$NON-NLS-1$
	return null;
	}
	return ImageDescriptor.createFromURL(url);
	}

	/**
	* Returns the page's label.
	*/
	public String getLabel() {
	return fElement.getAttribute(LABEL_ATTRIBUTE);
	}

	/**
	* Returns <code>true</code> if the scope section needs
	* to be shown in the dialog.
	*/
	public boolean showScopeSection() {
	return Boolean.valueOf(fElement.getAttribute(SHOW_SCOPE_SECTION_ATTRIBUTE)).booleanValue();
	}

	/**
	* Returns <code>true</code> if the page is initially
	* shown in the Search dialog.
	*
	* This attribute is optional and defaults to <code>true</code>.
	*/
	public boolean isInitiallyEnabled() {
	String strVal= fElement.getAttribute(ENABLED_ATTRIBUTE);
	return strVal == null \|\| Boolean.valueOf(strVal).booleanValue();
	}

	/**
	* Returns <code>true</code> if the page can handle
	* searches in enclosing projects. The value should be ignored if <code>showScopeSection()</code>
	* returns <code>false</code>.
	*
	* This attribute is optional and defaults to <code>false</code>.
	*/
	public boolean canSearchInProjects() {
	return Boolean.valueOf(fElement.getAttribute(CAN_SEARCH_ENCLOSING_PROJECTS)).booleanValue();
	}

	/**
	* Returns the page's preferred size
	*/
	public Point getPreferredSize() {
	return StringConverter.asPoint(
	fElement.getAttribute(SIZE_ATTRIBUTE), UNKNOWN_SIZE);
	}

	/**
	* Returns the page's tab position relative to the other tabs.
	* @return the tab position or <code>Integer.MAX_VALUE</code> if not defined in
	* the plugins.xml file
	*/
	public int getTabPosition() {
	int position= Integer.MAX_VALUE / 2;
	String str= fElement.getAttribute(TAB_POSITION_ATTRIBUTE);
	if (str != null)
	try {
	position= Integer.parseInt(str);
	} catch (NumberFormatException ex) {
	ExceptionHandler.log(ex, SearchMessages.getString("Search.Error.createSearchPage.message")); //$NON-NLS-1$
	// position is Integer.MAX_VALUE;
	}
	return position;
	}

	boolean isEnabled() {
	return getEnabledPageIds().contains(getId());
	}

	/**
	* Returns the help context for help shown in search view.
	*
	* @return the help context id or <code>null</code> if not defined
	*/
	public String getSearchViewHelpContextId() {
	return fElement.getAttribute(SEARCH_VIEW_HELP_CONTEXT_ID_ATTRIBUTE);
	}

	static void setEnabled(Object[] enabledDescriptors) {
	fgEnabledPageIds= new ArrayList(5);
	for (int i= 0; i < enabledDescriptors.length; i++) {
	if (enabledDescriptors[i] instanceof SearchPageDescriptor)
	fgEnabledPageIds.add(((SearchPageDescriptor)enabledDescriptors[i]).getId());
	}
	storeEnabledPageIds();
	}

	private static List getEnabledPageIds() {
	if (fgEnabledPageIds == null) {
	List descriptors= SearchPlugin.getDefault().getSearchPageDescriptors();

	String[] enabledPageIds= getDialogSettings().getArray(STORE_ENABLED_PAGE_IDS);
	if (enabledPageIds == null)
	fgEnabledPageIds= new ArrayList(descriptors.size());
	else
	fgEnabledPageIds= new ArrayList(Arrays.asList(enabledPageIds));


	List processedPageIds;
	String[] processedPageIdsArr= getDialogSettings().getArray(STORE_PROCESSED_PAGE_IDS);
	if (processedPageIdsArr == null)
	processedPageIds= new ArrayList(descriptors.size());
	else
	processedPageIds= new ArrayList(Arrays.asList(processedPageIdsArr));

	// Enable pages based on contribution
	Iterator iter= descriptors.iterator();
	while (iter.hasNext()) {
	SearchPageDescriptor desc= (SearchPageDescriptor)iter.next();
	if (processedPageIds.contains(desc.getId()))
	continue;

	processedPageIds.add(desc.getId());
	if (desc.isInitiallyEnabled())
	fgEnabledPageIds.add(desc.getId());
	}

	getDialogSettings().put(STORE_PROCESSED_PAGE_IDS, (String[])processedPageIds.toArray(new String[processedPageIds.size()]));
	storeEnabledPageIds();
	}
	return fgEnabledPageIds;
	}

	private static void storeEnabledPageIds() {
	getDialogSettings().put(STORE_ENABLED_PAGE_IDS, (String[])fgEnabledPageIds.toArray(new String[fgEnabledPageIds.size()]));
	SearchPlugin.getDefault().savePluginPreferences();
	}

	private static IDialogSettings getDialogSettings() {
	IDialogSettings settings= SearchPlugin.getDefault().getDialogSettings();
	IDialogSettings section= settings.getSection(SECTION_ID);
	if (section == null)
	// create new section
	section= settings.addNewSection(SECTION_ID);
	return section;
	}

	/*
	* Implements a method from IComparable
	*/
	public int compareTo(Object o) {
	int myPos= getTabPosition();
	int objsPos= ((SearchPageDescriptor)o).getTabPosition();
	if (myPos == Integer.MAX_VALUE && objsPos == Integer.MAX_VALUE \|\| myPos == objsPos)
	return getLabel().compareTo(((SearchPageDescriptor)o).getLabel());
	else
	return myPos - objsPos;
	}

	//---- Suitability tests ---------------------------------------------------

	/**
	* Returns the score for this page with the given input element.
	*/
	public int computeScore(Object element) {
	if (element instanceof IAdaptable) {
	IResource resource= (IResource)((IAdaptable)element).getAdapter(IResource.class);
	if (resource != null && resource.getType() == IResource.FILE) {
	String extension= ((IFile)resource).getFileExtension();
	if (extension != null)
	return getScoreForFileExtension(extension);
	} else {
	ISearchPageScoreComputer tester=
	(ISearchPageScoreComputer)((IAdaptable)element).getAdapter(ISearchPageScoreComputer.class);
	if (tester != null)
	return tester.computeScore(getId(), element);
	}
	} else if (element instanceof ISearchResultViewEntry) {
	ISearchResultViewEntry entry= (ISearchResultViewEntry)element;
	return computeScore(entry.getSelectedMarker());
	}
	if (fWildcardScore != ISearchPageScoreComputer.UNKNOWN)
	return fWildcardScore;

	return ISearchPageScoreComputer.LOWEST;
	}

	private int getScoreForFileExtension(String extension) {
	if (fExtensionScorePairs == null)
	readExtensionScorePairs();

	int size= fExtensionScorePairs.size();
	for (int i= 0; i < size; i++) {
	ExtensionScorePair p= (ExtensionScorePair)fExtensionScorePairs.get(i);
	if (extension.equals(p.extension))
	return p.score;
	}
	if (fWildcardScore != ISearchPageScoreComputer.UNKNOWN)
	return fWildcardScore;

	return ISearchPageScoreComputer.LOWEST;
	}

	private void readExtensionScorePairs() {
	fExtensionScorePairs= new ArrayList(3);
	String content= fElement.getAttribute(EXTENSIONS_ATTRIBUTE);
	if (content == null)
	return;
	StringTokenizer tokenizer= new StringTokenizer(content, ","); //$NON-NLS-1$
	while (tokenizer.hasMoreElements()) {
	String token= tokenizer.nextToken().trim();
	int pos= token.indexOf(':');
	if (pos != -1) {
	String extension= token.substring(0, pos);
	int score= StringConverter.asInt(token.substring(pos+1), ISearchPageScoreComputer.UNKNOWN);
	if (extension.equals("*")) { //$NON-NLS-1$
	fWildcardScore= score;
	} else {
	fExtensionScorePairs.add(new ExtensionScorePair(extension, score));
	}
	}
	}
	}
	}