Bug 450411 - EPartService should contain a method, which checks if an

MPart is shown in a certain Perpective

Change-Id: Id9fece2e5d2da58019932d5482bfab761a3a6b68
Signed-off-by: Simon Scholz <simon.scholz@vogella.com>

3 files changed, 45 insertions, 1 deletions

diff --git a/bundles/org.eclipse.e4.ui.workbench/src/org/eclipse/e4/ui/internal/workbench/ApplicationPartServiceImpl.java b/bundles/org.eclipse.e4.ui.workbench/src/org/eclipse/e4/ui/internal/workbench/ApplicationPartServiceImpl.java
index 45a1a7f5627..5554f65e471 100644
--- a/bundles/org.eclipse.e4.ui.workbench/src/org/eclipse/e4/ui/internal/workbench/ApplicationPartServiceImpl.java
+++ b/bundles/org.eclipse.e4.ui.workbench/src/org/eclipse/e4/ui/internal/workbench/ApplicationPartServiceImpl.java
@@ -58,6 +58,11 @@ public class ApplicationPartServiceImpl implements EPartService {
 	}
 
 	@Override
+	public boolean isPartOrPlaceholderInPerspective(String elementId, MPerspective perspective) {
+		return getActiveWindowService().isPartOrPlaceholderInPerspective(elementId, perspective);
+	}
+
+	@Override
 	public void switchPerspective(MPerspective perspective) {
 		getActiveWindowService().switchPerspective(perspective);
 	}
diff --git a/bundles/org.eclipse.e4.ui.workbench/src/org/eclipse/e4/ui/internal/workbench/PartServiceImpl.java b/bundles/org.eclipse.e4.ui.workbench/src/org/eclipse/e4/ui/internal/workbench/PartServiceImpl.java
index 46a50f1b3a1..b57dd80e4e5 100644
--- a/bundles/org.eclipse.e4.ui.workbench/src/org/eclipse/e4/ui/internal/workbench/PartServiceImpl.java
+++ b/bundles/org.eclipse.e4.ui.workbench/src/org/eclipse/e4/ui/internal/workbench/PartServiceImpl.java
@@ -8,6 +8,7 @@
  * Contributors:
  *     IBM Corporation - initial API and implementation
  *     Lars Vogel (Lars.Vogel@gmail.com) - Bug 416082
+ *     Simon Scholz <simon.scholz@vogella.com> - Bug 450411
  ******************************************************************************/
 package org.eclipse.e4.ui.internal.workbench;
 
@@ -549,6 +550,29 @@ public class PartServiceImpl implements EPartService {
 	}
 
 	@Override
+	public boolean isPartOrPlaceholderInPerspective(String elementId, MPerspective perspective) {
+		List<MPart> findElements = modelService.findElements(perspective, elementId, MPart.class, null);
+		if (!findElements.isEmpty()) {
+			MPart part = findElements.get(0);
+
+			// if that is a shared part, check the placeholders
+			if (workbenchWindow.getSharedElements().contains(part)) {
+				List<MPlaceholder> placeholders = modelService.findElements(perspective, elementId,
+						MPlaceholder.class, null);
+				for (MPlaceholder mPlaceholder : placeholders) {
+					if (mPlaceholder.isVisible() && mPlaceholder.isToBeRendered()) {
+						return true;
+					}
+				}
+				return false;
+			}
+			// not a shared part
+			return part.isVisible() && part.isToBeRendered();
+		}
+		return false;
+	}
+
+	@Override
 	public void switchPerspective(MPerspective perspective) {
 		Assert.isNotNull(perspective);
 		MWindow window = getWindow();
diff --git a/bundles/org.eclipse.e4.ui.workbench/src/org/eclipse/e4/ui/workbench/modeling/EPartService.java b/bundles/org.eclipse.e4.ui.workbench/src/org/eclipse/e4/ui/workbench/modeling/EPartService.java
index cea6ed18607..d4fff0cc690 100644
--- a/bundles/org.eclipse.e4.ui.workbench/src/org/eclipse/e4/ui/workbench/modeling/EPartService.java
+++ b/bundles/org.eclipse.e4.ui.workbench/src/org/eclipse/e4/ui/workbench/modeling/EPartService.java
@@ -1,5 +1,5 @@
 /*******************************************************************************
- * Copyright (c) 2009, 2013 IBM Corporation and others.
+ * Copyright (c) 2009, 2014 IBM Corporation and others.
  * All rights reserved. This program and the accompanying materials
  * are made available under the terms of the Eclipse Public License v1.0
  * which accompanies this distribution, and is available at
@@ -7,6 +7,7 @@
  *
  * Contributors:
  *     IBM Corporation - initial API and implementation
+ *     Simon Scholz <simon.scholz@vogella.com> - Bug 450411
  ******************************************************************************/
 package org.eclipse.e4.ui.workbench.modeling;
 
@@ -344,4 +345,18 @@ public interface EPartService {
 	 * @noreference This method is not intended to be referenced by clients.
 	 */
 	public void switchPerspective(MPerspective perspective);
+
+	/**
+	 * Indicates whether a part with a certain elementId is currently rendered in a certain
+	 * perspective or not.
+	 *
+	 * @param elementId
+	 *            the id of the part, which should be checked
+	 * @param perspective
+	 *            the perspective, which may contain the part with the given elementId
+	 * @return <code>true</code> if the part with the given elementId is rendered in the given
+	 *         perspective and <code>false</code> otherwise
+	 * @since 1.3
+	 */
+	public boolean isPartOrPlaceholderInPerspective(String elementId, MPerspective perspective);
 }
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