net.sourceforge.phpeclipse.ui/src/net/sourceforge/phpdt/internal/ui/viewsupport/MemberFilter.java

   1 /*******************************************************************************
   2  * Copyright (c) 2000, 2003 IBM Corporation and others.
   3  * All rights reserved. This program and the accompanying materials
   4  * are made available under the terms of the Common Public License v1.0
   5  * which accompanies this distribution, and is available at
   6  * http://www.eclipse.org/legal/cpl-v10.html
   7  *
   8  * Contributors:
   9  *     IBM Corporation - initial API and implementation
  10  *******************************************************************************/
  11 package net.sourceforge.phpdt.internal.ui.viewsupport;
  12
  13 import net.sourceforge.phpdt.core.Flags;
  14 import net.sourceforge.phpdt.core.IField;
  15 import net.sourceforge.phpdt.core.IJavaElement;
  16 import net.sourceforge.phpdt.core.IMember;
  17 import net.sourceforge.phpdt.core.IType;
  18 import net.sourceforge.phpdt.core.JavaModelException;
  19
  20 import org.eclipse.jface.viewers.Viewer;
  21 import org.eclipse.jface.viewers.ViewerFilter;
  22
  23 /**
  24  * Filter for the methods viewer. Changing a filter property does not trigger a
  25  * refiltering of the viewer
  26  */
  27 public class MemberFilter extends ViewerFilter {
  28
  29         public static final int FILTER_NONPUBLIC = 1;
  30
  31         public static final int FILTER_STATIC = 2;
  32
  33         public static final int FILTER_FIELDS = 4;
  34
  35         private int fFilterProperties;
  36
  37         /**
  38          * Modifies filter and add a property to filter for
  39          */
  40         public final void addFilter(int filter) {
  41                 fFilterProperties |= filter;
  42         }
  43
  44         /**
  45          * Modifies filter and remove a property to filter for
  46          */
  47         public final void removeFilter(int filter) {
  48                 fFilterProperties &= (-1 ^ filter);
  49         }
  50
  51         /**
  52          * Tests if a property is filtered
  53          */
  54         public final boolean hasFilter(int filter) {
  55                 return (fFilterProperties & filter) != 0;
  56         }
  57
  58         /*
  59          * @see ViewerFilter@isFilterProperty
  60          */
  61 //      public boolean isFilterProperty(Object element, Object property) {
  62 //              return false;
  63 //      }
  64
  65         /*
  66          * @see ViewerFilter@select
  67          */
  68         public boolean select(Viewer viewer, Object parentElement, Object element) {
  69                 try {
  70                         if (hasFilter(FILTER_FIELDS) && element instanceof IField) {
  71                                 return false;
  72                         }
  73                         if (element instanceof IMember) {
  74                                 IMember member = (IMember) element;
  75                                 if (member.getElementName().startsWith("<")) { // filter out
  76                                                                                                                                 // <clinit>
  77                                                                                                                                 // //$NON-NLS-1$
  78                                         return false;
  79                                 }
  80                                 int flags = member.getFlags();
  81                                 if (hasFilter(FILTER_STATIC)
  82                                                 && (Flags.isStatic(flags) || isFieldInInterface(member))
  83                                                 && member.getElementType() != IJavaElement.TYPE) {
  84                                         return false;
  85                                 }
  86                                 if (hasFilter(FILTER_NONPUBLIC) && !Flags.isPublic(flags)
  87                                                 && !isMemberInInterface(member)
  88                                                 && !isTopLevelType(member)) {
  89                                         return false;
  90                                 }
  91                         }
  92                 } catch (JavaModelException e) {
  93                         // ignore
  94                 }
  95                 return true;
  96         }
  97
  98         private boolean isMemberInInterface(IMember member)
  99                         throws JavaModelException {
 100                 IType parent = member.getDeclaringType();
 101                 return parent != null && parent.isInterface();
 102         }
 103
 104         private boolean isFieldInInterface(IMember member)
 105                         throws JavaModelException {
 106                 return (member.getElementType() == IJavaElement.FIELD)
 107                                 && member.getDeclaringType().isInterface();
 108         }
 109
 110         private boolean isTopLevelType(IMember member) throws JavaModelException {
 111                 IType parent = member.getDeclaringType();
 112                 return parent == null;
 113         }
 114 }