1 /*******************************************************************************
2 * Copyright (c) 2007, 2010 Association for Decentralized Information Management
4 * All rights reserved. This program and the accompanying materials
5 * are made available under the terms of the Eclipse Public License v1.0
6 * which accompanies this distribution, and is available at
7 * http://www.eclipse.org/legal/epl-v10.html
10 * VTT Technical Research Centre of Finland - initial API and implementation
11 *******************************************************************************/
12 package org.simantics.ui;
14 import org.eclipse.jface.resource.ImageDescriptor;
15 import org.eclipse.jface.viewers.ISelection;
16 import org.eclipse.swt.widgets.Display;
17 import org.eclipse.swt.widgets.Widget;
18 import org.eclipse.ui.PlatformUI;
19 import org.simantics.DatabaseJob;
20 import org.simantics.db.Resource;
21 import org.simantics.db.Session;
22 import org.simantics.db.common.primitiverequest.Adapter;
23 import org.simantics.db.common.utils.Logger;
24 import org.simantics.db.common.utils.RequestUtil;
25 import org.simantics.db.exception.DatabaseException;
26 import org.simantics.db.management.ISessionContext;
27 import org.simantics.db.management.ISessionContextProvider;
28 import org.simantics.db.management.ISessionContextProviderSource;
29 import org.simantics.project.IProject;
30 import org.simantics.project.ProjectKeys;
31 import org.simantics.utils.datastructures.Arrays;
32 import org.simantics.utils.ui.BundleUtils;
33 import org.simantics.utils.ui.ISelectionUtils;
34 import org.simantics.utils.ui.SWTUtils;
38 public class SimanticsUI {
40 public static final String PLUGIN_ID = "org.simantics.ui";
43 * The maximum amount of time in milliseconds to wait for the execution of a
44 * database request to start when the request is executed synchronously in
45 * the UI thread. The timeout counting starts from the moment the request is
46 * first scheduled into the database {@link Session}. The purpose is to
47 * prevent synchronous UI thread database requests from locking the whole UI
51 * The default value is 20. The default value can be customized at class
52 * load time by setting the system property
53 * <code>simantics.ui.request.start.timeout</code> to the desired value at
58 public static final long UI_THREAD_REQUEST_START_TIMEOUT;
60 * The maximum amount of time in milliseconds to wait for the execution of a
61 * database request to complete when the request is executed synchronously
62 * in the UI thread. The timeout counting starts from the moment the request
63 * execution is scheduled. The purpose is to prevent synchronous UI thread
64 * database requests from locking the whole UI thread up.
67 * The default value is 50. The default value can be customized at class
68 * load time by setting the system property
69 * <code>simantics.ui.request.execution.timeout</code> to the desired value
74 public static final long UI_THREAD_REQUEST_EXECUTION_TIMEOUT;
78 * The default value is 100. The default value can be customized at class
79 * load time by setting the system property
80 * <code>simantics.ui.request.execution.timeout.long</code> to the desired
81 * value at JVM startup.
85 public static final long UI_THREAD_REQUEST_EXECUTION_TIMEOUT_LONG;
88 UI_THREAD_REQUEST_START_TIMEOUT = parseLongProperty("simantics.ui.request.start.timeout", 500L);
89 UI_THREAD_REQUEST_EXECUTION_TIMEOUT = parseLongProperty("simantics.ui.request.exec.timeout", 50L);
90 UI_THREAD_REQUEST_EXECUTION_TIMEOUT_LONG = parseLongProperty("simantics.ui.request.exec.timeout.long", 100L);
94 * Information of the currently open database session for the Simantics UI.
95 * Contains just the vital information to connect to the database. Is
96 * <code>null</code> when there is no open database session.
98 private static ISessionContextProviderSource providerSource = null;
101 // * TODO: support different contexts
102 // * @deprecated no replacement
105 // public static void undo() {
107 // PlatformUI.getWorkbench().getOperationSupport().getOperationHistory().undo(
108 // IOperationHistory.GLOBAL_UNDO_CONTEXT, null, null);
109 // } catch (ExecutionException e) {
110 // // TODO Auto-generated catch block
111 // e.printStackTrace();
116 // * TODO: support different contexts
117 // * @deprecated no replacement
120 // public static void redo() {
122 // PlatformUI.getWorkbench().getOperationSupport().getOperationHistory().redo(
123 // IOperationHistory.GLOBAL_UNDO_CONTEXT, null, null);
124 // } catch (ExecutionException e) {
125 // // TODO Auto-generated catch block
126 // e.printStackTrace();
131 * Only for use in application startup code such as the workbench window
132 * advisor. Must be invoked before calling any other methods in this class.
134 * @param manager the ISessionManager to be used by the application
135 * @throw IllegalArgumentException if manager is <code>null</code>
137 public static void setSessionContextProviderSource(ISessionContextProviderSource source) {
139 throw new IllegalArgumentException("null provider source");
140 providerSource = source;
144 * Asserts that the current context provider source has been initialized
145 * before allowing access to it.
147 * @return current context provider source
149 public static ISessionContextProviderSource getProviderSource() {
150 if (providerSource == null)
151 throw new IllegalStateException(
152 "providerSource must be initialized by the application before using SimanticsUI");
153 return providerSource;
157 * Close and remove the current session contexts of the UI. Afterwards
158 * getSessionContext will return <code>null</code>.
160 * Not for client use, only for internal purposes.
162 public static synchronized void closeSessions() {
163 ISessionContextProviderSource source = providerSource;
166 for (ISessionContextProvider p : source.getAll()) {
167 ISessionContext ctx = p.setSessionContext(null);
175 * @return <code>true</code> if the session manager contains the specified
178 public static synchronized boolean isInUse(ISessionContext ctx) {
179 for (ISessionContextProvider p : getProviderSource().getAll()) {
180 if (p.getSessionContext() == ctx)
187 * @param project the project to check
189 * @return <code>true</code> if the session manager contains an
190 * ISessionContext that contains a reference to the specified
191 * project, disregarding the excluded ISessionContexts listed
193 public static synchronized boolean isInUse(IProject project, ISessionContext... excluding) {
194 for (ISessionContextProvider p : getProviderSource().getAll()) {
195 ISessionContext ctx = p.getSessionContext();
197 if (Arrays.indexOf(excluding, ctx) == -1) {
198 if (ctx.getHint(ProjectKeys.KEY_PROJECT) == project)
207 // * Looks if there is an ISessionContextProvider within the Simantics workbench
208 // * that is currently using a ProCore database server at the specified
211 // * @param address the address to look for connections to
212 // * @return <code>null</code> if there is currently no session in use to the
213 // * specified address.
215 // public static synchronized ISessionContext findSessionTo(ServerAddress address) {
216 // if (address == null)
217 // throw new IllegalArgumentException("null address");
218 // for (ISessionContextProvider provider : getProviderSource().getAll()) {
219 // ISessionContext ctx = provider.getSessionContext();
220 // if (ctx != null) {
221 // ServerAddress addr = ctx.getAddress();
222 // if (address.equals(addr))
230 * Returns the session context provider of the curretly active workbench
231 * window. This method will always return a valid session context provider.
233 * @return a valid ISessionContextProvider
235 public static ISessionContextProvider getSessionContextProvider() {
236 return getProviderSource().getActive();
240 * Returns the session context provider for the specified handle if one
241 * exists. Workbench windows (IWorkbenchWindow) are currently used as
244 * @param handle the handle associated with the requested session context
246 * @return <code>null</code> if there is no session associated to the
249 public static ISessionContextProvider getSessionContextProvider(Object handle) {
250 return getProviderSource().get(handle);
254 * Returns the database session context associated with the currently active
255 * workbench window. This method should be used to retrieve session contexts
256 * only when the client is sure that the correct workbench window has focus.
259 * If the client knows the workbench window it is working with, but it isn't
260 * sure that the correct workbench window has focus, use
261 * {@link #getSessionContext(Object)} instead.
264 * @return the session context associated with the currently active
265 * workbench window or <code>null</code> if the active window has no
268 public static ISessionContext getSessionContext() {
269 ISessionContextProvider provider = getSessionContextProvider();
270 return provider != null ? provider.getSessionContext() : null;
274 * Returns the database session context associated with the specified
275 * handle. Workbench windows (IWorkbenchWindow) are currently used as
276 * handles. This method should be used to retrieve session contexts in cases
277 * where the workbench window is known, but the thread of execution is such
278 * that the client cannot be certain that the same workbench window has
281 * @return the session context associated with the specified handle
284 public static ISessionContext getSessionContext(Object handle) {
285 return getSessionContextProvider(handle).getSessionContext();
289 * Associates the specified ISessionContext with the currently active
290 * workbench window. To remove an ISessionContext association from the
291 * active workbench window, specify <code>null</code> as ctx.
294 * After invoking this method you should be able to retrieve the same
295 * ISessionContext through {@link #getSessionContext()}, provided that the
296 * same workbench window has focus at that time.
299 * @param ctx the new UI database session context or <code>null</code> to
300 * replace the current UI session with no session.
301 * @return The previous session context if one existed, otherwise
302 * <code>null</code>. If the specified <code>ctx</code> matched the
303 * current session context (<code>null</code> or
304 * <code>non-null</code>), null is also returned and nothing is
307 public static synchronized ISessionContext setSessionContext(ISessionContext ctx) {
308 return getSessionContextProvider().setSessionContext(ctx);
312 * Associates the specified ISessionContext with the specified handle
316 * Currently IWorkbenchWindow's are used as handles. This implies
317 * that each workbench window can only have one active ISessionContext bound
318 * to it. After invoking this method with a valid workbench window handle
319 * you should be able to retrieve the same ISessionContext through
320 * {@link #getSessionContext(Object)} with the same workbench window
321 * specified as the handle.
324 * @param handle the handle to associate the specified ISessionContext with.
325 * @param ctx the new UI database session context or <code>null</code> to
326 * replace the current UI session with no session.
327 * @return The previous session context if one existed, otherwise
328 * <code>null</code>. If the specified <code>ctx</code> matched the
329 * current session context (<code>null</code> or
330 * <code>non-null</code>), null is also returned and nothing is
333 public static synchronized ISessionContext setSessionContext(Object handle, ISessionContext ctx) {
334 ISessionContextProvider provider = getProviderSource().get(handle);
335 if (provider != null)
336 return provider.setSessionContext(ctx);
341 * Returns the database Session bound to the currently active workbench
345 * This method should only be invoked in cases where it is certain that the
346 * correct workbench window has focus or it is the latest of all workbench
347 * windows to have had focus. Basically any invocation from the SWT UI
348 * thread is safe, since because in those cases the currently active
349 * workbench window is generally known. Instead invocations from any other
350 * thread should be carefully considered. The rule of thumb is that if you
351 * cannot be sure that the correct workbench window has focus, you should
352 * always get a hold of the Session to be used in some other manner.
356 * The method always returns a non-null Session or produces an
357 * IllegalStateException if a Session was not attainable.
360 * @return the Session bound to the currently active workbench window
361 * @throws IllegalStateException if no Session was available
363 public static Session getSession() {
364 ISessionContext ctx = getSessionContext();
366 throw new IllegalStateException("Session unavailable, no database session open");
367 return ctx.getSession();
371 * Returns the database Session bound to the currently active workbench
372 * window. Differently from {@link #getSession()}, this method returns
373 * <code>null</code> if there is no current Session available.
376 * This method should only be invoked from the SWT UI thread. Check the
377 * explanations given in {@link #getSession()}. The same applies to this
381 * @return the Session bound to the currently active workbench window or
384 public static Session peekSession() {
385 ISessionContext ctx = getSessionContext();
386 return ctx == null ? null : ctx.peekSession();
390 * @return the currently open and active project as an IProject or
391 * <code>null</code> if there is no active session or project
393 public static IProject peekProject() {
394 ISessionContext ctx = getSessionContext();
395 return ctx == null ? null : (org.simantics.project.IProject) ctx.getHint(ProjectKeys.KEY_PROJECT);
399 * @return the currently open and active project for the specified database
400 * session or <code>null</code> if there is no current project
402 public static IProject peekProject(ISessionContext ctx) {
405 return ctx.getHint(ProjectKeys.KEY_PROJECT);
409 * @return the currently open and active project as an IProject
410 * @throws IllegalStateException if there is no currently active database
411 * session, which also means there is no active project at the
414 public static IProject getProject() {
415 ISessionContext ctx = getSessionContext();
417 throw new IllegalStateException("No current database session");
418 return ctx.getHint(ProjectKeys.KEY_PROJECT);
422 * TODO: refactor this out of here
424 * @param imageFilePath
427 public static ImageDescriptor getImageDescriptor(String imageFilePath) {
428 return BundleUtils.getImageDescriptorFromPlugin(PLUGIN_ID, imageFilePath);
432 * TODO: [Tuukka] I'm really unsure this belongs here.
436 * @param assignableFrom
439 public static <T> T filterSingleSelection(ISelection sel, Class<T> assignableFrom) {
441 T result = ISelectionUtils.filterSingleSelection(sel, assignableFrom);
445 Resource resource = ISelectionUtils.filterSingleSelection(sel, Resource.class);
446 if(resource == null) return null;
449 return getSession().syncRequest(new Adapter<T>(resource, assignableFrom));
450 } catch (DatabaseException e) {
451 Logger.defaultLogError(e);
457 public static <T> T filterSingleWorkbenchSelection(Class<T> assignableFrom) {
458 return filterSingleSelection(PlatformUI.getWorkbench().getActiveWorkbenchWindow().getSelectionService().getSelection(), assignableFrom);
462 public static void asyncExecSWT(final Widget widget, final Runnable runnable) {
463 SWTUtils.asyncExec(widget, delayedExecSWT(null, widget, runnable));
466 public static void asyncExecSWT(final Display display, final Runnable runnable) {
467 SWTUtils.asyncExec(display, delayedExecSWT(display, null, runnable));
470 private static Runnable delayedExecSWT(final Display display, final Widget widget, final Runnable runnable) {
471 if (display == null && widget == null)
472 throw new IllegalArgumentException("both display and widget are null");
474 return new Runnable() {
477 if (display != null && display.isDisposed())
479 if (widget != null && widget.isDisposed())
481 if (DatabaseJob.inProgress()) {
482 Display d = display != null ? display : widget.getDisplay();
483 d.timerExec(50, this);
491 private static long parseLongProperty(String propertyName, long defaultValue) {
492 String value = System.getProperty(propertyName, null);
494 return value != null ? Long.parseLong(value) : defaultValue;
495 } catch (NumberFormatException e) {
500 public static boolean isLinuxGTK() {
501 String ws = System.getProperty("osgi.ws");
502 return ws != null && "gtk".equals(ws);