J. Duke | 319a3b9 | 2007-12-01 00:00:00 +0000 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright 2003-2005 Sun Microsystems, Inc. All Rights Reserved. |
| 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| 4 | * |
| 5 | * This code is free software; you can redistribute it and/or modify it |
| 6 | * under the terms of the GNU General Public License version 2 only, as |
| 7 | * published by the Free Software Foundation. Sun designates this |
| 8 | * particular file as subject to the "Classpath" exception as provided |
| 9 | * by Sun in the LICENSE file that accompanied this code. |
| 10 | * |
| 11 | * This code is distributed in the hope that it will be useful, but WITHOUT |
| 12 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| 13 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| 14 | * version 2 for more details (a copy is included in the LICENSE file that |
| 15 | * accompanied this code). |
| 16 | * |
| 17 | * You should have received a copy of the GNU General Public License version |
| 18 | * 2 along with this work; if not, write to the Free Software Foundation, |
| 19 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| 20 | * |
| 21 | * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, |
| 22 | * CA 95054 USA or visit www.sun.com if you need additional information or |
| 23 | * have any questions. |
| 24 | */ |
| 25 | |
| 26 | package sun.awt.X11; |
| 27 | |
| 28 | import java.util.*; |
| 29 | |
| 30 | /** |
| 31 | * Helper class to ease the work with the lists of atoms. |
| 32 | */ |
| 33 | class XAtomList { |
| 34 | Set<XAtom> atoms = new HashSet<XAtom>(); |
| 35 | |
| 36 | /** |
| 37 | * Creates empty list. |
| 38 | */ |
| 39 | public XAtomList() { |
| 40 | } |
| 41 | |
| 42 | /** |
| 43 | * Creates instance of XAtomList and initializes it with |
| 44 | * the contents pointer by <code>data</code>. |
| 45 | * Uses default display to initialize atoms. |
| 46 | */ |
| 47 | public XAtomList(long data, int count) { |
| 48 | init(data, count); |
| 49 | } |
| 50 | private void init(long data, int count) { |
| 51 | for (int i = 0; i < count; i++) { |
| 52 | add(new XAtom(XToolkit.getDisplay(), XAtom.getAtom(data+count*XAtom.getAtomSize()))); |
| 53 | } |
| 54 | } |
| 55 | |
| 56 | /** |
| 57 | * Creates instance of XAtomList and initializes it with |
| 58 | * the arrays of atoms. Array can contain null atoms. |
| 59 | */ |
| 60 | public XAtomList(XAtom[] atoms) { |
| 61 | init(atoms); |
| 62 | } |
| 63 | private void init(XAtom[] atoms) { |
| 64 | for (int i = 0; i < atoms.length; i++) { |
| 65 | add(atoms[i]); |
| 66 | } |
| 67 | } |
| 68 | |
| 69 | /** |
| 70 | * Returns contents of the list as array of atoms. |
| 71 | */ |
| 72 | public XAtom[] getAtoms() { |
| 73 | XAtom[] res = new XAtom[size()]; |
| 74 | Iterator<XAtom> iter = atoms.iterator(); |
| 75 | int i = 0; |
| 76 | while (iter.hasNext()) { |
| 77 | res[i++] = iter.next(); |
| 78 | } |
| 79 | return res; |
| 80 | } |
| 81 | |
| 82 | /** |
| 83 | * Returns contents of the list as pointer to native data |
| 84 | * The size of the native data is size of the list multiplied by |
| 85 | * size of the Atom type on the platform. Caller is responsible for |
| 86 | * freeing the data by Unsafe.freeMemory when it is no longer needed. |
| 87 | */ |
| 88 | public long getAtomsData() { |
| 89 | return XAtom.toData(getAtoms()); |
| 90 | } |
| 91 | |
| 92 | /** |
| 93 | * Returns true if this list contains the atom <code>atom</code> |
| 94 | */ |
| 95 | public boolean contains(XAtom atom) { |
| 96 | return atoms.contains(atom); |
| 97 | } |
| 98 | |
| 99 | /** |
| 100 | * Add atom to the list. Does nothing if list already contains this atom. |
| 101 | */ |
| 102 | public void add(XAtom atom) { |
| 103 | atoms.add(atom); |
| 104 | } |
| 105 | |
| 106 | /** |
| 107 | * Removes atom from the list. Does nothing if arrays doesn't conaint this atom. |
| 108 | */ |
| 109 | public void remove(XAtom atom) { |
| 110 | atoms.remove(atom); |
| 111 | } |
| 112 | |
| 113 | |
| 114 | /** |
| 115 | * Returns size of the list |
| 116 | */ |
| 117 | public int size() { |
| 118 | return atoms.size(); |
| 119 | } |
| 120 | |
| 121 | /** |
| 122 | * Returns a subset of a list which is intersection of this set and set build by mapping <code>mask</code> in |
| 123 | * <code>mapping</code>. |
| 124 | */ |
| 125 | public XAtomList subset(int mask, Map<Integer, XAtom> mapping) { |
| 126 | XAtomList res = new XAtomList(); |
| 127 | Iterator<Integer> iter = mapping.keySet().iterator(); |
| 128 | while (iter.hasNext()) { |
| 129 | Integer bits = iter.next(); |
| 130 | if ( (mask & bits.intValue()) == bits.intValue() ) { |
| 131 | XAtom atom = mapping.get(bits); |
| 132 | if (contains(atom)) { |
| 133 | res.add(atom); |
| 134 | } |
| 135 | } |
| 136 | } |
| 137 | return res; |
| 138 | } |
| 139 | |
| 140 | /** |
| 141 | * Returns iterator for items. |
| 142 | */ |
| 143 | public Iterator<XAtom> iterator() { |
| 144 | return atoms.iterator(); |
| 145 | } |
| 146 | |
| 147 | /** |
| 148 | * Merges without duplicates all the atoms from another list |
| 149 | */ |
| 150 | public void addAll(XAtomList atoms) { |
| 151 | Iterator<XAtom> iter = atoms.iterator(); |
| 152 | while(iter.hasNext()) { |
| 153 | add(iter.next()); |
| 154 | } |
| 155 | } |
| 156 | |
| 157 | public String toString() { |
| 158 | StringBuffer buf = new StringBuffer(); |
| 159 | buf.append("["); |
| 160 | Iterator iter = atoms.iterator(); |
| 161 | while (iter.hasNext()) { |
| 162 | buf.append(iter.next().toString()); |
| 163 | if (iter.hasNext()) { |
| 164 | buf.append(", "); |
| 165 | } |
| 166 | } |
| 167 | buf.append("]"); |
| 168 | return buf.toString(); |
| 169 | } |
| 170 | } |