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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 | } | ||