001: /*
002: * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
003: *
004: * Copyright 1997-2007 Sun Microsystems, Inc. All rights reserved.
005: *
006: * The contents of this file are subject to the terms of either the GNU
007: * General Public License Version 2 only ("GPL") or the Common
008: * Development and Distribution License("CDDL") (collectively, the
009: * "License"). You may not use this file except in compliance with the
010: * License. You can obtain a copy of the License at
011: * http://www.netbeans.org/cddl-gplv2.html
012: * or nbbuild/licenses/CDDL-GPL-2-CP. See the License for the
013: * specific language governing permissions and limitations under the
014: * License. When distributing the software, include this License Header
015: * Notice in each file and include the License file at
016: * nbbuild/licenses/CDDL-GPL-2-CP. Sun designates this
017: * particular file as subject to the "Classpath" exception as provided
018: * by Sun in the GPL Version 2 section of the License file that
019: * accompanied this code. If applicable, add the following below the
020: * License Header, with the fields enclosed by brackets [] replaced by
021: * your own identifying information:
022: * "Portions Copyrighted [year] [name of copyright owner]"
023: *
024: * Contributor(s):
025: *
026: * The Original Software is NetBeans. The Initial Developer of the Original
027: * Software is Sun Microsystems, Inc. Portions Copyright 1997-2006 Sun
028: * Microsystems, Inc. All Rights Reserved.
029: *
030: * If you wish your version of this file to be governed by only the CDDL
031: * or only the GPL Version 2, indicate your decision by adding
032: * "[Contributor] elects to include this software in this distribution
033: * under the [CDDL or GPL Version 2] license." If you do not indicate a
034: * single choice of license, a recipient has the option to distribute
035: * your version of this file under either the CDDL, the GPL Version 2 or
036: * to extend the choice of license to its licensees as provided above.
037: * However, if you add GPL Version 2 code and therefore, elected the GPL
038: * Version 2 license, then the option applies only if the new code is
039: * made subject to such option by the copyright holder.
040: */
041: package org.netbeans.modules.vmd.api.screen.editor;
042:
043: import org.netbeans.modules.vmd.api.model.DesignComponent;
044: import org.netbeans.modules.vmd.api.model.DesignDocument;
045: import org.netbeans.modules.vmd.api.model.common.DocumentSupport;
046: import org.netbeans.modules.vmd.api.screen.display.ScreenDisplayPresenter;
047:
048: import java.util.ArrayList;
049: import java.util.List;
050: import java.util.WeakHashMap;
051:
052: /**
053: * @author David Kaspar
054: */
055: public final class EditedScreenSupport {
056:
057: private static final WeakHashMap<DesignDocument, EditedScreenSupport> instances = new WeakHashMap<DesignDocument, EditedScreenSupport>();
058:
059: private long editedScreenComponentID = -1;
060: private final ArrayList<Listener> listeners = new ArrayList<EditedScreenSupport.Listener>();
061:
062: private EditedScreenSupport() {
063: }
064:
065: public static synchronized EditedScreenSupport getSupportForDocument(
066: DesignDocument document) {
067: EditedScreenSupport support = instances.get(document);
068: if (support == null)
069: instances
070: .put(document, support = new EditedScreenSupport());
071: return support;
072: }
073:
074: public void addListener(Listener listener) {
075: synchronized (listeners) {
076: listeners.add(listener);
077: }
078: }
079:
080: public void removeListener(Listener listener) {
081: synchronized (listeners) {
082: listeners.remove(listener);
083: }
084: }
085:
086: public long getEditedScreenComponentID() {
087: return editedScreenComponentID;
088: }
089:
090: /**
091: * This method has to be called from AWT thread and under read or write access on the document.
092: * This method must not be called within EditedScreenSupport.Listener.editedScreenChanged method.
093: * Also be aware of setting correct component id.
094: * @param editedScreenComponentID the edited screen component id
095: */
096: public void setEditedScreenComponentID(long editedScreenComponentID) {
097: this .editedScreenComponentID = editedScreenComponentID;
098: Listener[] listenersArray;
099: synchronized (listeners) {
100: listenersArray = listeners.toArray(new Listener[listeners
101: .size()]);
102: }
103: for (EditedScreenSupport.Listener listener : listenersArray)
104: listener.editedScreenChanged(editedScreenComponentID);
105: }
106:
107: /**
108: * Return all editable screens in the document.
109: * Call this method within the read or write access only.
110: * @param document the design document
111: * @return the list of all editable screens in the document.
112: */
113: public static List<DesignComponent> getAllEditableScreensInDocument(
114: DesignDocument document) {
115: assert document.getTransactionManager().isAccess();
116: ArrayList<DesignComponent> screens = new ArrayList<DesignComponent>();
117: for (DesignComponent component : DocumentSupport
118: .gatherAllComponentsContainingPresenterClass(document,
119: ScreenDisplayPresenter.class)) {
120: if (component.getPresenter(ScreenDisplayPresenter.class)
121: .isTopLevelDisplay())
122: screens.add(component);
123: }
124: return screens;
125: }
126:
127: public interface Listener {
128:
129: /**
130: * This method is called within the AWT thread and under read or write access on the document.
131: * The EditedScreenSupport.setEditedScreenComponentID method must not be called within this method.
132: * @param editedScreenComponentID the edited screen component id
133: */
134: void editedScreenChanged(long editedScreenComponentID);
135:
136: }
137:
138: }
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