J. Duke | 319a3b9 | 2007-12-01 00:00:00 +0000 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright 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 | package java.awt; |
| 26 | |
| 27 | import java.awt.event.*; |
| 28 | |
| 29 | import sun.awt.AppContext; |
| 30 | |
| 31 | abstract class ModalEventFilter implements EventFilter { |
| 32 | |
| 33 | protected Dialog modalDialog; |
| 34 | protected boolean disabled; |
| 35 | |
| 36 | protected ModalEventFilter(Dialog modalDialog) { |
| 37 | this.modalDialog = modalDialog; |
| 38 | disabled = false; |
| 39 | } |
| 40 | |
| 41 | Dialog getModalDialog() { |
| 42 | return modalDialog; |
| 43 | } |
| 44 | |
| 45 | public FilterAction acceptEvent(AWTEvent event) { |
| 46 | if (disabled || !modalDialog.isVisible()) { |
| 47 | return FilterAction.ACCEPT; |
| 48 | } |
| 49 | int eventID = event.getID(); |
| 50 | if ((eventID >= MouseEvent.MOUSE_FIRST && |
| 51 | eventID <= MouseEvent.MOUSE_LAST) || |
| 52 | (eventID >= ActionEvent.ACTION_FIRST && |
| 53 | eventID <= ActionEvent.ACTION_LAST) || |
| 54 | eventID == WindowEvent.WINDOW_CLOSING) |
| 55 | { |
| 56 | Object o = event.getSource(); |
| 57 | if (o instanceof sun.awt.ModalExclude) { |
| 58 | // Exclude this object from modality and |
| 59 | // continue to pump it's events. |
| 60 | } else if (o instanceof Component) { |
| 61 | Component c = (Component)o; |
| 62 | while ((c != null) && !(c instanceof Window)) { |
| 63 | c = c.getParent_NoClientCode(); |
| 64 | } |
| 65 | if (c != null) { |
| 66 | return acceptWindow((Window)c); |
| 67 | } |
| 68 | } |
| 69 | } |
| 70 | return FilterAction.ACCEPT; |
| 71 | } |
| 72 | |
| 73 | protected abstract FilterAction acceptWindow(Window w); |
| 74 | |
| 75 | // When a modal dialog is hidden its modal filter may not be deleted from |
| 76 | // EventDispatchThread event filters immediately, so we need to mark the filter |
| 77 | // as disabled to prevent it from working. Simple checking for visibility of |
| 78 | // the modalDialog is not enough, as it can be hidden and then shown again |
| 79 | // with a new event pump and a new filter |
| 80 | void disable() { |
| 81 | disabled = true; |
| 82 | } |
| 83 | |
| 84 | int compareTo(ModalEventFilter another) { |
| 85 | Dialog anotherDialog = another.getModalDialog(); |
| 86 | // check if modalDialog is from anotherDialog's hierarchy |
| 87 | // or vice versa |
| 88 | Component c = modalDialog; |
| 89 | while (c != null) { |
| 90 | if (c == anotherDialog) { |
| 91 | return 1; |
| 92 | } |
| 93 | c = c.getParent_NoClientCode(); |
| 94 | } |
| 95 | c = anotherDialog; |
| 96 | while (c != null) { |
| 97 | if (c == modalDialog) { |
| 98 | return -1; |
| 99 | } |
| 100 | c = c.getParent_NoClientCode(); |
| 101 | } |
| 102 | // check if one dialog blocks (directly or indirectly) another |
| 103 | Dialog blocker = modalDialog.getModalBlocker(); |
| 104 | while (blocker != null) { |
| 105 | if (blocker == anotherDialog) { |
| 106 | return -1; |
| 107 | } |
| 108 | blocker = blocker.getModalBlocker(); |
| 109 | } |
| 110 | blocker = anotherDialog.getModalBlocker(); |
| 111 | while (blocker != null) { |
| 112 | if (blocker == modalDialog) { |
| 113 | return 1; |
| 114 | } |
| 115 | blocker = blocker.getModalBlocker(); |
| 116 | } |
| 117 | // compare modality types |
| 118 | return modalDialog.getModalityType().compareTo(anotherDialog.getModalityType()); |
| 119 | } |
| 120 | |
| 121 | static ModalEventFilter createFilterForDialog(Dialog modalDialog) { |
| 122 | switch (modalDialog.getModalityType()) { |
| 123 | case DOCUMENT_MODAL: return new DocumentModalEventFilter(modalDialog); |
| 124 | case APPLICATION_MODAL: return new ApplicationModalEventFilter(modalDialog); |
| 125 | case TOOLKIT_MODAL: return new ToolkitModalEventFilter(modalDialog); |
| 126 | } |
| 127 | return null; |
| 128 | } |
| 129 | |
| 130 | private static class ToolkitModalEventFilter extends ModalEventFilter { |
| 131 | |
| 132 | private AppContext appContext; |
| 133 | |
| 134 | ToolkitModalEventFilter(Dialog modalDialog) { |
| 135 | super(modalDialog); |
| 136 | appContext = modalDialog.appContext; |
| 137 | } |
| 138 | |
| 139 | protected FilterAction acceptWindow(Window w) { |
| 140 | if (w.isModalExcluded(Dialog.ModalExclusionType.TOOLKIT_EXCLUDE)) { |
| 141 | return FilterAction.ACCEPT; |
| 142 | } |
| 143 | if (w.appContext != appContext) { |
| 144 | return FilterAction.REJECT; |
| 145 | } |
| 146 | while (w != null) { |
| 147 | if (w == modalDialog) { |
| 148 | return FilterAction.ACCEPT_IMMEDIATELY; |
| 149 | } |
| 150 | w = w.getOwner(); |
| 151 | } |
| 152 | return FilterAction.REJECT; |
| 153 | } |
| 154 | } |
| 155 | |
| 156 | private static class ApplicationModalEventFilter extends ModalEventFilter { |
| 157 | |
| 158 | private AppContext appContext; |
| 159 | |
| 160 | ApplicationModalEventFilter(Dialog modalDialog) { |
| 161 | super(modalDialog); |
| 162 | appContext = modalDialog.appContext; |
| 163 | } |
| 164 | |
| 165 | protected FilterAction acceptWindow(Window w) { |
| 166 | if (w.isModalExcluded(Dialog.ModalExclusionType.APPLICATION_EXCLUDE)) { |
| 167 | return FilterAction.ACCEPT; |
| 168 | } |
| 169 | if (w.appContext == appContext) { |
| 170 | while (w != null) { |
| 171 | if (w == modalDialog) { |
| 172 | return FilterAction.ACCEPT_IMMEDIATELY; |
| 173 | } |
| 174 | w = w.getOwner(); |
| 175 | } |
| 176 | return FilterAction.REJECT; |
| 177 | } |
| 178 | return FilterAction.ACCEPT; |
| 179 | } |
| 180 | } |
| 181 | |
| 182 | private static class DocumentModalEventFilter extends ModalEventFilter { |
| 183 | |
| 184 | private Window documentRoot; |
| 185 | |
| 186 | DocumentModalEventFilter(Dialog modalDialog) { |
| 187 | super(modalDialog); |
| 188 | documentRoot = modalDialog.getDocumentRoot(); |
| 189 | } |
| 190 | |
| 191 | protected FilterAction acceptWindow(Window w) { |
| 192 | // application- and toolkit-excluded windows are blocked by |
| 193 | // document-modal dialogs from their child hierarchy |
| 194 | if (w.isModalExcluded(Dialog.ModalExclusionType.APPLICATION_EXCLUDE)) { |
| 195 | Window w1 = modalDialog.getOwner(); |
| 196 | while (w1 != null) { |
| 197 | if (w1 == w) { |
| 198 | return FilterAction.REJECT; |
| 199 | } |
| 200 | w1 = w1.getOwner(); |
| 201 | } |
| 202 | return FilterAction.ACCEPT; |
| 203 | } |
| 204 | while (w != null) { |
| 205 | if (w == modalDialog) { |
| 206 | return FilterAction.ACCEPT_IMMEDIATELY; |
| 207 | } |
| 208 | if (w == documentRoot) { |
| 209 | return FilterAction.REJECT; |
| 210 | } |
| 211 | w = w.getOwner(); |
| 212 | } |
| 213 | return FilterAction.ACCEPT; |
| 214 | } |
| 215 | } |
| 216 | } |