Source Code Cross Referenced for SystemMenuNewEditor.java in  » IDE-Eclipse » ui-workbench » org » eclipse » ui » internal » presentations » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » IDE Eclipse » ui workbench » org.eclipse.ui.internal.presentations 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


001:        /*******************************************************************************
002:         * Copyright (c) 2004, 2007 IBM Corporation and others.
003:         * All rights reserved. This program and the accompanying materials
004:         * are made available under the terms of the Eclipse Public License v1.0
005:         * which accompanies this distribution, and is available at
006:         * http://www.eclipse.org/legal/epl-v10.html
007:         *
008:         * Contributors:
009:         *     IBM Corporation - initial API and implementation
010:         *******************************************************************************/package org.eclipse.ui.internal.presentations;
011:
012:        import org.eclipse.jface.action.Action;
013:        import org.eclipse.ui.IEditorPart;
014:        import org.eclipse.ui.IPersistableEditor;
015:        import org.eclipse.ui.IWorkbenchPage;
016:        import org.eclipse.ui.IWorkbenchWindow;
017:        import org.eclipse.ui.PartInitException;
018:        import org.eclipse.ui.PlatformUI;
019:        import org.eclipse.ui.XMLMemento;
020:        import org.eclipse.ui.internal.IWorkbenchConstants;
021:        import org.eclipse.ui.internal.WorkbenchMessages;
022:        import org.eclipse.ui.internal.WorkbenchPage;
023:        import org.eclipse.ui.internal.dialogs.DialogUtil;
024:        import org.eclipse.ui.presentations.IPresentablePart;
025:        import org.eclipse.ui.presentations.IStackPresentationSite;
026:
027:        /**
028:         * This convenience class provides a "New Editor" system menu item that 
029:         * opens another editor of the same type as the current editor, on the same input.
030:         * Presentations can use this to add a "New Editor" item to their system menu.
031:         *  
032:         * @since 3.1
033:         */
034:        public final class SystemMenuNewEditor extends Action implements 
035:                ISelfUpdatingAction {
036:
037:            private IStackPresentationSite site;
038:            private IPresentablePart part;
039:
040:            /**
041:             * Creates a new instance of the action
042:             * 
043:             * @param site the presentation site
044:             */
045:            public SystemMenuNewEditor(IStackPresentationSite site) {
046:                this .site = site;
047:                setText(WorkbenchMessages.PartPane_newEditor);
048:            }
049:
050:            /**
051:             * Disposes the action.
052:             */
053:            public void dispose() {
054:                site = null;
055:            }
056:
057:            public void run() {
058:                if (part != null) {
059:                    // the site doesn't give access to the page or the active editor,
060:                    // so we need to reach
061:                    IWorkbenchWindow window = PlatformUI.getWorkbench()
062:                            .getActiveWorkbenchWindow();
063:                    if (window != null) {
064:                        IWorkbenchPage page = window.getActivePage();
065:                        if (page != null) {
066:                            IEditorPart editor = page == null ? null : page
067:                                    .getActiveEditor();
068:                            if (editor != null) {
069:                                String editorId = editor.getSite().getId();
070:                                if (editorId != null) {
071:                                    try {
072:                                        if (editor instanceof  IPersistableEditor) {
073:                                            XMLMemento editorState = XMLMemento
074:                                                    .createWriteRoot(IWorkbenchConstants.TAG_EDITOR_STATE);
075:                                            ((IPersistableEditor) editor)
076:                                                    .saveState(editorState);
077:                                            ((WorkbenchPage) page).openEditor(
078:                                                    editor.getEditorInput(),
079:                                                    editorId, true,
080:                                                    IWorkbenchPage.MATCH_NONE,
081:                                                    editorState);
082:                                        } else {
083:                                            page.openEditor(editor
084:                                                    .getEditorInput(),
085:                                                    editorId, true,
086:                                                    IWorkbenchPage.MATCH_NONE);
087:                                        }
088:                                    } catch (PartInitException e) {
089:                                        DialogUtil.openError(page
090:                                                .getWorkbenchWindow()
091:                                                .getShell(),
092:                                                WorkbenchMessages.Error, e
093:                                                        .getMessage(), e);
094:                                    }
095:                                }
096:                            }
097:                        }
098:                    }
099:                }
100:            }
101:
102:            /**
103:             * Sets the target of this action to the given part.
104:             * 
105:             * @param presentablePart
106:             *            the target part for this action, or <code>null</code> if
107:             *            there is no appopriate target part
108:             */
109:            public void setTarget(IPresentablePart presentablePart) {
110:                this .part = presentablePart;
111:                setEnabled(presentablePart != null);
112:            }
113:
114:            /* (non-Javadoc)
115:             * @see org.eclipse.ui.internal.presentations.ISelfUpdatingAction#update()
116:             */
117:            public void update() {
118:                setTarget(site.getSelectedPart());
119:            }
120:
121:            /* (non-Javadoc)
122:             * @see org.eclipse.ui.internal.presentations.ISelfUpdatingAction#shouldBeVisible()
123:             */
124:            public boolean shouldBeVisible() {
125:                return true;
126:            }
127:        }
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