content: /*******************************************************************************
   * Copyright (c) 2000, 2008 IBM Corporation and others.
   * All rights reserved. This program and the accompanying materials
   * are made available under the terms of the Eclipse Public License v1.0
   * which accompanies this distribution, and is available at
   * http://www.eclipse.org/legal/epl-v10.html
   *
   * Contributors:
   *     IBM Corporation - initial API and implementation
   *******************************************************************************/
  package org.eclipse.wst.jsdt.internal.ui.wizards.buildpaths;
  
  import java.util.ArrayList;
  import java.util.List;
  import java.util.Set;
  
  import org.eclipse.core.runtime.IPath;
  import org.eclipse.swt.widgets.Composite;
  import org.eclipse.swt.widgets.Control;
  import org.eclipse.swt.widgets.Shell;
  import org.eclipse.wst.jsdt.core.IIncludePathAttribute;
  import org.eclipse.wst.jsdt.core.IIncludePathEntry;
  import org.eclipse.wst.jsdt.core.IJavaScriptProject;
  import org.eclipse.wst.jsdt.internal.corext.util.JavaModelUtil;
  import org.eclipse.wst.jsdt.internal.ui.JavaScriptPlugin;
  import org.eclipse.wst.jsdt.ui.wizards.ClasspathAttributeConfiguration;
  
  public abstract class BuildPathBasePage {
  	
  	private ClasspathAttributeConfigurationDescriptors fAttributeDescriptors;
  	
  	public BuildPathBasePage() {
  		fAttributeDescriptors= JavaScriptPlugin.getDefault().getClasspathAttributeConfigurationDescriptors();
  	}
  		
  	protected boolean editCustomAttribute(Shell shell, CPListElementAttribute elem) {
  		ClasspathAttributeConfiguration config= fAttributeDescriptors.get(elem.getKey());
  		if (config != null) {
  			IIncludePathAttribute result= config.performEdit(shell, elem.getClasspathAttributeAccess());
  			if (result != null) {
  				elem.setValue(result.getValue());
  				return true;
  			}
  		}
  		return false;
  	}
  	
  	protected boolean removeCustomAttribute(CPListElementAttribute elem) {
  		ClasspathAttributeConfiguration config= fAttributeDescriptors.get(elem.getKey());
  		if (config != null) {
  			IIncludePathAttribute result= config.performRemove(elem.getClasspathAttributeAccess());
  			if (result != null) {
  				elem.setValue(result.getValue());
  				return true;
  			}
  		}
  		return false;
  	}
  	
  	protected boolean canEditCustomAttribute(CPListElementAttribute elem) {
  		ClasspathAttributeConfiguration config= fAttributeDescriptors.get(elem.getKey());
  		if (config != null) {
  			return config.canEdit(elem.getClasspathAttributeAccess());
  		}
  		return false;
  	}
  	
  	protected boolean canRemoveCustomAttribute(CPListElementAttribute elem) {
  		ClasspathAttributeConfiguration config= fAttributeDescriptors.get(elem.getKey());
  		if (config != null) {
  			return config.canRemove(elem.getClasspathAttributeAccess());
  		}
  		return false;
  	}
  	
  	
  	public abstract List getSelection();
  	public abstract void setSelection(List selection, boolean expand);
  	
  	
  	public void addElement(CPListElement element) {
  		
  	}
  	
  	public abstract boolean isEntryKind(int kind);
  			
  	protected void filterAndSetSelection(List list) {
  		ArrayList res= new ArrayList(list.size());
  		for (int i= list.size()-1; i >= 0; i--) {
  			Object curr= list.get(i);
  			if (curr instanceof CPListElement) {
  				CPListElement elem= (CPListElement) curr;
  				if (elem.getParentContainer() == null && isEntryKind(elem.getEntryKind())) {
  					res.add(curr);
  				}
  			}
  		}
  		setSelection(res, false);
  	}
  	
  	public static void fixNestingConflicts(CPListElement[] newEntries, CPListElement[] existing, Set modifiedSourceEntries) {
  		for (int i= 0; i < newEntries.length; i++) {
  			addExclusionPatterns(newEntries[i], existing, modifiedSourceEntries);
  		}
  	}
  	
  	private static void addExclusionPatterns(CPListElement newEntry, CPListElement[] existing, Set modifiedEntries) {
  		IPath entryPath= newEntry.getPath();
  		for (int i= 0; i < existing.length; i++) {
  			CPListElement curr= existing[i];
  			if (curr.getEntryKind() == IIncludePathEntry.CPE_SOURCE) {
  				IPath currPath= curr.getPath();
  				if (!currPath.equals(entryPath)) {
  					if (currPath.isPrefixOf(entryPath)) {
  						if (addToExclusions(entryPath, curr)) {
  							modifiedEntries.add(curr);
  						}
  					} else if (entryPath.isPrefixOf(currPath) && newEntry.getEntryKind() == IIncludePathEntry.CPE_SOURCE) {
  						if (addToExclusions(currPath, newEntry)) {
  							modifiedEntries.add(curr);
  						}
  					}
  				}
  			}
  		}
  	}
  	
  	private static boolean addToExclusions(IPath entryPath, CPListElement curr) {
  		IPath[] exclusionFilters= (IPath[]) curr.getAttribute(CPListElement.EXCLUSION);
  		if (!JavaModelUtil.isExcludedPath(entryPath, exclusionFilters)) {
  			IPath pathToExclude= entryPath.removeFirstSegments(curr.getPath().segmentCount()).addTrailingSeparator();
  			IPath[] newExclusionFilters= new IPath[exclusionFilters.length + 1];
  			System.arraycopy(exclusionFilters, 0, newExclusionFilters, 0, exclusionFilters.length);
  			newExclusionFilters[exclusionFilters.length]= pathToExclude;
  			curr.setAttribute(CPListElement.EXCLUSION, newExclusionFilters);
  			return true;
  		}
  		return false;
  	}
  	
  	protected boolean containsOnlyTopLevelEntries(List selElements) {
  		if (selElements.size() == 0) {
  			return true;
  		}
  		for (int i= 0; i < selElements.size(); i++) {
  			Object elem= selElements.get(i);
  			if (elem instanceof CPListElement) {
  				if (((CPListElement) elem).getParentContainer() != null) {
  					return false;
  				}
  			} else {
  				return false;
  			}
  		}
  		return true;
  	}
  
  	public abstract void init(IJavaScriptProject javaProject);
  
  	public abstract Control getControl(Composite parent);
  	
  	public abstract void setFocus();
  	
  	public void aboutToShow() {}
  	public void aboutToDispose() {}
  	
  }
  