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| 1 | +/* | |
| 2 | + * Copyright (c) 2005, Oracle and/or its affiliates. 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. Oracle designates this | |
| 8 | + * particular file as subject to the "Classpath" exception as provided | |
| 9 | + * by Oracle 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA | |
| 22 | + * or visit www.oracle.com if you need additional information or have any | |
| 23 | + * 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 | +} | |