| /******************************************************************************* |
| * Copyright (c) 2010, 2019 IBM Corporation and others. |
| * |
| * This program and the accompanying materials |
| * are made available under the terms of the Eclipse Public License 2.0 |
| * which accompanies this distribution, and is available at |
| * https://www.eclipse.org/legal/epl-2.0/ |
| * |
| * SPDX-License-Identifier: EPL-2.0 |
| * |
| * Contributors: |
| * IBM Corporation - initial API and implementation |
| * Andrey Loskutov <loskutov@gmx.de> - Bug 372799 |
| ******************************************************************************/ |
| package org.eclipse.ui.internal.handlers; |
| |
| import org.eclipse.core.commands.ExecutionEvent; |
| import org.eclipse.core.expressions.EvaluationResult; |
| import org.eclipse.core.expressions.Expression; |
| import org.eclipse.core.expressions.ExpressionInfo; |
| import org.eclipse.core.expressions.IEvaluationContext; |
| import org.eclipse.e4.ui.model.application.ui.basic.MPart; |
| import org.eclipse.e4.ui.workbench.modeling.EPartService; |
| import org.eclipse.ui.ISaveablePart; |
| import org.eclipse.ui.ISources; |
| import org.eclipse.ui.IWorkbenchPart; |
| import org.eclipse.ui.IWorkbenchWindow; |
| import org.eclipse.ui.handlers.HandlerUtil; |
| import org.eclipse.ui.internal.AbstractEvaluationHandler; |
| import org.eclipse.ui.internal.InternalHandlerUtil; |
| import org.eclipse.ui.internal.SaveableHelper; |
| import org.eclipse.ui.internal.WorkbenchWindow; |
| |
| /** |
| * @since 3.7 |
| * |
| */ |
| public abstract class AbstractSaveHandler extends AbstractEvaluationHandler { |
| |
| protected static DirtyStateTracker dirtyStateTracker; |
| private Expression enabledWhen; |
| |
| public AbstractSaveHandler() { |
| if (dirtyStateTracker == null) { |
| dirtyStateTracker = new DirtyStateTracker(); |
| } |
| } |
| |
| @Override |
| protected Expression getEnabledWhenExpression() { |
| if (enabledWhen == null) { |
| enabledWhen = new Expression() { |
| @Override |
| public EvaluationResult evaluate(IEvaluationContext context) { |
| return AbstractSaveHandler.this.evaluate(context); |
| } |
| |
| @Override |
| public void collectExpressionInfo(ExpressionInfo info) { |
| info.addVariableNameAccess(ISources.ACTIVE_PART_NAME); |
| } |
| }; |
| } |
| return enabledWhen; |
| } |
| |
| protected abstract EvaluationResult evaluate(IEvaluationContext context); |
| |
| protected ISaveablePart getSaveablePart(IEvaluationContext context) { |
| IWorkbenchPart activePart = InternalHandlerUtil.getActivePart(context); |
| ISaveablePart part = SaveableHelper.getSaveable(activePart); |
| if (part != null) { |
| return part; |
| } |
| return InternalHandlerUtil.getActiveEditor(context); |
| } |
| |
| protected ISaveablePart getSaveablePart(ExecutionEvent event) { |
| IWorkbenchPart activePart = HandlerUtil.getActivePart(event); |
| ISaveablePart part = SaveableHelper.getSaveable(activePart); |
| if (part != null) { |
| return part; |
| } |
| return HandlerUtil.getActiveEditor(event); |
| } |
| |
| public static DirtyStateTracker getDirtyStateTracker() { |
| return dirtyStateTracker; |
| } |
| |
| protected MPart getActivePart(IWorkbenchWindow window) { |
| MPart part = null; |
| if (window instanceof WorkbenchWindow) { |
| EPartService partService = null; |
| try { |
| partService = ((WorkbenchWindow) window).getModel().getContext().get(EPartService.class); |
| } catch (Exception e) { |
| // do nothing |
| } |
| if (partService != null) { |
| part = partService.getActivePart(); |
| } |
| } |
| return part; |
| } |
| } |