476625: [GEF4] Implement an "Open with..." action for Papyrus Diagrams

https://bugs.eclipse.org/bugs/show_bug.cgi?id=476625

Change-Id: Ibe9a085bca197c8ef6aae2a37c044ca8429b3fee
Signed-off-by: Camille Letavernier <camille.letavernier@cea.fr>

5 files changed, 158 insertions, 11 deletions

diff --git a/plugins/views/modelexplorer/org.eclipse.papyrus.views.modelexplorer/.classpath b/plugins/views/modelexplorer/org.eclipse.papyrus.views.modelexplorer/.classpath
index 2d1a4302f04..eca7bdba8f0 100644
--- a/plugins/views/modelexplorer/org.eclipse.papyrus.views.modelexplorer/.classpath
+++ b/plugins/views/modelexplorer/org.eclipse.papyrus.views.modelexplorer/.classpath
@@ -1,7 +1,7 @@
-<?xml version="1.0" encoding="UTF-8"?>

-<classpath>

-	<classpathentry kind="con" path="org.eclipse.jdt.launching.JRE_CONTAINER/org.eclipse.jdt.internal.debug.ui.launcher.StandardVMType/J2SE-1.5"/>

-	<classpathentry kind="con" path="org.eclipse.pde.core.requiredPlugins"/>

-	<classpathentry kind="src" path="src"/>

-	<classpathentry kind="output" path="bin"/>

-</classpath>

+<?xml version="1.0" encoding="UTF-8"?>
+<classpath>
+	<classpathentry kind="con" path="org.eclipse.jdt.launching.JRE_CONTAINER/org.eclipse.jdt.internal.debug.ui.launcher.StandardVMType/JavaSE-1.8"/>
+	<classpathentry kind="con" path="org.eclipse.pde.core.requiredPlugins"/>
+	<classpathentry kind="src" path="src"/>
+	<classpathentry kind="output" path="bin"/>
+</classpath>
diff --git a/plugins/views/modelexplorer/org.eclipse.papyrus.views.modelexplorer/.settings/org.eclipse.jdt.core.prefs b/plugins/views/modelexplorer/org.eclipse.papyrus.views.modelexplorer/.settings/org.eclipse.jdt.core.prefs
index 4759947300a..62a08f4494d 100644
--- a/plugins/views/modelexplorer/org.eclipse.papyrus.views.modelexplorer/.settings/org.eclipse.jdt.core.prefs
+++ b/plugins/views/modelexplorer/org.eclipse.papyrus.views.modelexplorer/.settings/org.eclipse.jdt.core.prefs
@@ -1,10 +1,10 @@
 eclipse.preferences.version=1

 org.eclipse.jdt.core.compiler.codegen.inlineJsrBytecode=enabled

-org.eclipse.jdt.core.compiler.codegen.targetPlatform=1.5

-org.eclipse.jdt.core.compiler.compliance=1.5

+org.eclipse.jdt.core.compiler.codegen.targetPlatform=1.8

+org.eclipse.jdt.core.compiler.compliance=1.8

 org.eclipse.jdt.core.compiler.problem.assertIdentifier=error

 org.eclipse.jdt.core.compiler.problem.enumIdentifier=error

-org.eclipse.jdt.core.compiler.source=1.5

+org.eclipse.jdt.core.compiler.source=1.8

 org.eclipse.jdt.core.formatter.align_type_members_on_columns=false

 org.eclipse.jdt.core.formatter.alignment_for_arguments_in_allocation_expression=16

 org.eclipse.jdt.core.formatter.alignment_for_arguments_in_annotation=0

diff --git a/plugins/views/modelexplorer/org.eclipse.papyrus.views.modelexplorer/META-INF/MANIFEST.MF b/plugins/views/modelexplorer/org.eclipse.papyrus.views.modelexplorer/META-INF/MANIFEST.MF
index e1d3883a4f5..30333282c2b 100644
--- a/plugins/views/modelexplorer/org.eclipse.papyrus.views.modelexplorer/META-INF/MANIFEST.MF
+++ b/plugins/views/modelexplorer/org.eclipse.papyrus.views.modelexplorer/META-INF/MANIFEST.MF
@@ -62,4 +62,4 @@ Bundle-Activator: org.eclipse.papyrus.views.modelexplorer.Activator
 Bundle-ManifestVersion: 2

 Bundle-Description: %pluginDescription

 Bundle-SymbolicName: org.eclipse.papyrus.views.modelexplorer;singleton:=true

-Bundle-RequiredExecutionEnvironment: J2SE-1.5

+Bundle-RequiredExecutionEnvironment: JavaSE-1.8

diff --git a/plugins/views/modelexplorer/org.eclipse.papyrus.views.modelexplorer/plugin.xml b/plugins/views/modelexplorer/org.eclipse.papyrus.views.modelexplorer/plugin.xml
index 3803b31198b..c1d38f6b4ba 100644
--- a/plugins/views/modelexplorer/org.eclipse.papyrus.views.modelexplorer/plugin.xml
+++ b/plugins/views/modelexplorer/org.eclipse.papyrus.views.modelexplorer/plugin.xml
@@ -182,6 +182,10 @@
        <visibleWhen checkEnabled="true">
        </visibleWhen>
     </command>
+    <dynamic
+          class="org.eclipse.papyrus.views.modelexplorer.actions.OpenWithMenu"
+          id="org.eclipse.papyrus.views.modelexplorer.dynamicOpenWith">
+    </dynamic>
     <command commandId="org.eclipse.papyrus.views.modelexplorer.popup.close.command" icon="icons/etool16/close.png" id="org.eclipse.papyrus.views.modelexplorer.modelexplorer.popup.close" label="&amp;Close" style="push" tooltip="Close">
        <visibleWhen checkEnabled="true">
        </visibleWhen>
diff --git a/plugins/views/modelexplorer/org.eclipse.papyrus.views.modelexplorer/src/org/eclipse/papyrus/views/modelexplorer/actions/OpenWithMenu.java b/plugins/views/modelexplorer/org.eclipse.papyrus.views.modelexplorer/src/org/eclipse/papyrus/views/modelexplorer/actions/OpenWithMenu.java
new file mode 100644
index 00000000000..aa3338a97b0
--- /dev/null
+++ b/plugins/views/modelexplorer/org.eclipse.papyrus.views.modelexplorer/src/org/eclipse/papyrus/views/modelexplorer/actions/OpenWithMenu.java
@@ -0,0 +1,143 @@
+package org.eclipse.papyrus.views.modelexplorer.actions;
+
+import java.util.Iterator;
+import java.util.Map;
+
+import org.eclipse.core.runtime.Platform;
+import org.eclipse.emf.ecore.EObject;
+import org.eclipse.jface.action.ContributionItem;
+import org.eclipse.jface.viewers.ISelection;
+import org.eclipse.jface.viewers.IStructuredSelection;
+import org.eclipse.papyrus.infra.core.sasheditor.contentprovider.IPageManager;
+import org.eclipse.papyrus.infra.core.sasheditor.di.contentprovider.DiSashModelManager;
+import org.eclipse.papyrus.infra.core.sasheditor.di.contentprovider.IOpenable;
+import org.eclipse.papyrus.infra.core.services.ServiceException;
+import org.eclipse.papyrus.infra.core.services.ServicesRegistry;
+import org.eclipse.papyrus.infra.emf.utils.EMFHelper;
+import org.eclipse.papyrus.views.modelexplorer.Activator;
+import org.eclipse.swt.SWT;
+import org.eclipse.swt.events.SelectionEvent;
+import org.eclipse.swt.events.SelectionListener;
+import org.eclipse.swt.widgets.Menu;
+import org.eclipse.swt.widgets.MenuItem;
+import org.eclipse.ui.ISelectionService;
+import org.eclipse.ui.IWorkbenchPart;
+import org.eclipse.ui.menus.IWorkbenchContribution;
+import org.eclipse.ui.services.IServiceLocator;
+
+public class OpenWithMenu extends ContributionItem implements IWorkbenchContribution {
+
+	private IServiceLocator serviceLocator;
+
+	public OpenWithMenu() {
+		super();
+	}
+
+	public OpenWithMenu(String id) {
+		super(id);
+	}
+
+	/**
+	 * @see org.eclipse.jface.action.ContributionItem#fill(org.eclipse.swt.widgets.Menu, int)
+	 *
+	 * @param menu
+	 * @param index
+	 */
+	@Override
+	public void fill(Menu menu, int index) {
+		ISelectionService selectionService = serviceLocator.getService(ISelectionService.class);
+		if (selectionService == null) {
+			return;
+		}
+
+		ISelection currentSelection = selectionService.getSelection();
+		if (!(currentSelection instanceof IStructuredSelection)) {
+			return;
+		}
+
+		IStructuredSelection selection = (IStructuredSelection) currentSelection;
+		if (selection.isEmpty()) {
+			return;
+		}
+
+		IWorkbenchPart part = serviceLocator.getService(IWorkbenchPart.class);
+		if (part == null) {
+			return;
+		}
+		ServicesRegistry registry = part.getAdapter(ServicesRegistry.class);
+		if (registry == null) {
+			return;
+		}
+
+		IPageManager pageManager;
+		try {
+			pageManager = registry.getService(IPageManager.class);
+			if (pageManager == null) {
+				return;
+			}
+		} catch (ServiceException ex) {
+			// Ignore and stop
+			return;
+		}
+
+		Iterator<?> iterator = selection.iterator();
+		while (iterator.hasNext()) {
+			final EObject selectedElement = EMFHelper.getEObject(iterator.next());
+			if (selectedElement == null) {
+				continue;
+			}
+
+			IOpenable papyrusPage = Platform.getAdapterManager().getAdapter(selectedElement, IOpenable.class);
+			if (papyrusPage == null) {
+				continue;
+			}
+
+			Map<String, String> editorIDs;
+			try {
+				DiSashModelManager modelManager = registry.getService(DiSashModelManager.class);
+				editorIDs = modelManager.getEditorIDsFor(selectedElement);
+			} catch (ServiceException ex) {
+				Activator.log.error(ex);
+				return;
+			}
+
+			if (editorIDs == null || editorIDs.size() < 2) {
+				return;
+			}
+
+			MenuItem openWith = new MenuItem(menu, SWT.CASCADE);
+			openWith.setText("Open with...");
+
+			Menu subMenu = new Menu(menu);
+			openWith.setMenu(subMenu);
+
+			for (Map.Entry<String, String> editorID : editorIDs.entrySet()) {
+				MenuItem gmfItem = new MenuItem(subMenu, SWT.NONE);
+				gmfItem.setText(editorID.getValue());
+				gmfItem.addSelectionListener(new SelectionListener() {
+
+					@Override
+					public void widgetSelected(SelectionEvent e) {
+						pageManager.openPage(selectedElement, editorID.getKey());
+					}
+
+					@Override
+					public void widgetDefaultSelected(SelectionEvent e) {
+						// Nothing
+					}
+				});
+			}
+		}
+	}
+
+	/**
+	 * @see org.eclipse.ui.menus.IWorkbenchContribution#initialize(org.eclipse.ui.services.IServiceLocator)
+	 *
+	 * @param serviceLocator
+	 */
+	@Override
+	public void initialize(IServiceLocator serviceLocator) {
+		this.serviceLocator = serviceLocator;
+	}
+
+}