[cleanup] Display mouse location

A Part of initial commit [1], about custom view to help debug
Sirius-specific issues, has been forgotten. This commit adds it. This is
to display the mouse location.

[1]
http://git.eclipse.org/c/sirius/org.eclipse.sirius.git/commit/?id=5dae0dea4848261a90234fa25ba8501271e9d6c2

Change-Id: I40f89a66235dece65899c96e98005a8d32fd633e
Signed-off-by: Laurent Redor <laurent.redor@obeo.fr>

2 files changed, 115 insertions, 1 deletions

diff --git a/plugins/org.eclipse.sirius.ui.debug/plugin.xml b/plugins/org.eclipse.sirius.ui.debug/plugin.xml
index 09d166884c..37050973a6 100644
--- a/plugins/org.eclipse.sirius.ui.debug/plugin.xml
+++ b/plugins/org.eclipse.sirius.ui.debug/plugin.xml
@@ -36,11 +36,20 @@
        </propertySections>
    </extension>
    <extension
+         point="org.eclipse.gmf.runtime.diagram.ui.editpolicyProviders">
+      <editpolicyProvider
+            class="org.eclipse.sirius.ui.debug.statusline.StatusLineEditPolicyProvider">
+         <Priority
+               name="Lowest">
+         </Priority>
+      </editpolicyProvider>
+   </extension>
+   <extension
          point="org.eclipse.ui.menus">
          <menuContribution
             locationURI="toolbar:org.eclipse.ui.trim.status">
          <toolbar
-               id="fr.obeo.dsl.viewpoint.diagram.debug.statusline.mouseLocationContribution">
+               id="org.eclipse.sirius.ui.debug.statusline.mouseLocationContribution">
             <control
                   class="org.eclipse.sirius.ui.debug.statusline.MouseLocationContribution"
                   id="contributions.mouseLocationContrib">
diff --git a/plugins/org.eclipse.sirius.ui.debug/src/org/eclipse/sirius/ui/debug/statusline/StatusLineEditPolicyProvider.java b/plugins/org.eclipse.sirius.ui.debug/src/org/eclipse/sirius/ui/debug/statusline/StatusLineEditPolicyProvider.java
new file mode 100644
index 0000000000..b905dea94e
--- /dev/null
+++ b/plugins/org.eclipse.sirius.ui.debug/src/org/eclipse/sirius/ui/debug/statusline/StatusLineEditPolicyProvider.java
@@ -0,0 +1,105 @@
+/*******************************************************************************
+ * Copyright (c) 2007, 2015 THALES GLOBAL SERVICES.
+ * 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
+ * http://www.eclipse.org/legal/epl-v10.html
+ *
+ * Contributors:
+ *    Obeo - initial API and implementation
+ *******************************************************************************/
+package org.eclipse.sirius.ui.debug.statusline;
+
+import java.util.ArrayList;
+import java.util.List;
+
+import org.eclipse.gef.EditPart;
+import org.eclipse.gef.EditPartViewer;
+import org.eclipse.gef.RootEditPart;
+import org.eclipse.gmf.runtime.common.core.service.IOperation;
+import org.eclipse.gmf.runtime.common.core.service.IProviderChangeListener;
+import org.eclipse.gmf.runtime.diagram.ui.editparts.DiagramEditPart;
+import org.eclipse.gmf.runtime.diagram.ui.services.editpolicy.CreateEditPoliciesOperation;
+import org.eclipse.gmf.runtime.diagram.ui.services.editpolicy.IEditPolicyProvider;
+import org.eclipse.swt.events.DisposeEvent;
+import org.eclipse.swt.events.DisposeListener;
+import org.eclipse.swt.widgets.Control;
+
+/**
+ * Provides Edit Policy on Diagram to display mouse location.
+ * 
+ * @author ymortier
+ */
+public class StatusLineEditPolicyProvider implements IEditPolicyProvider {
+
+    /** the property change support. */
+    private final List<IProviderChangeListener> listeners;
+
+    /**
+     * Create a new {@link StatusLineEditPolicyProvider}.
+     */
+    public StatusLineEditPolicyProvider() {
+        this.listeners = new ArrayList<IProviderChangeListener>();
+    }
+
+    /**
+     * {@inheritDoc}
+     * 
+     * @see org.eclipse.gmf.runtime.diagram.ui.services.editpolicy.IEditPolicyProvider#createEditPolicies(org.eclipse.gef.EditPart)
+     */
+    public void createEditPolicies(final EditPart editPart) {
+        if (editPart instanceof DiagramEditPart) {
+            final DiagramEditPart diagramEditPart = (DiagramEditPart) editPart;
+            final RootEditPart root = diagramEditPart.getRoot();
+            final EditPartViewer viewer = root.getViewer();
+
+            if (viewer != null) {
+                final MouseListeners mouseListeners = new MouseListeners(viewer);
+
+                viewer.getControl().addDisposeListener(new DisposeListener() {
+
+                    public void widgetDisposed(final DisposeEvent e) {
+                        e.widget.removeDisposeListener(this);
+                        if (e.widget instanceof Control) {
+                            ((Control) e.widget).removeMouseMoveListener(mouseListeners);
+                            ((Control) e.widget).removeMouseTrackListener(mouseListeners);
+                        }
+                    }
+                });
+                viewer.getControl().addMouseMoveListener(mouseListeners);
+                viewer.getControl().addMouseTrackListener(mouseListeners);
+            }
+        }
+    }
+
+    /**
+     * {@inheritDoc}
+     * 
+     * @see org.eclipse.gmf.runtime.common.core.service.IProvider#addProviderChangeListener(org.eclipse.gmf.runtime.common.core.service.IProviderChangeListener)
+     */
+    public void addProviderChangeListener(final IProviderChangeListener listener) {
+        this.listeners.add(listener);
+    }
+
+    /**
+     * {@inheritDoc}
+     * 
+     * @see org.eclipse.gmf.runtime.common.core.service.IProvider#provides(org.eclipse.gmf.runtime.common.core.service.IOperation)
+     */
+    public boolean provides(final IOperation operation) {
+        boolean result = false;
+        if (operation instanceof CreateEditPoliciesOperation) {
+            result = true;
+        }
+        return result;
+    }
+
+    /**
+     * {@inheritDoc}
+     * 
+     * @see org.eclipse.gmf.runtime.common.core.service.IProvider#removeProviderChangeListener(org.eclipse.gmf.runtime.common.core.service.IProviderChangeListener)
+     */
+    public void removeProviderChangeListener(final IProviderChangeListener listener) {
+        this.listeners.remove(listener);
+    }
+}