Bug 528992 - [CSS] There should be a way to remove a style

- Add a new remove style command

Change-Id: I10086c959aee83239bd5198499a060663b6ae269
Signed-off-by: Quentin Le Menez <quentin.lemenez@cea.fr>
(cherry picked from commit 4da7dfa2a6d3d35a1e4f52289b669c710d300ebd)

1 files changed, 74 insertions, 0 deletions

diff --git a/plugins/infra/gmfdiag/css/org.eclipse.papyrus.infra.gmfdiag.css.properties/src/org/eclipse/papyrus/infra/gmfdiag/css/properties/databinding/RemoveCssClassStyleCommand.java b/plugins/infra/gmfdiag/css/org.eclipse.papyrus.infra.gmfdiag.css.properties/src/org/eclipse/papyrus/infra/gmfdiag/css/properties/databinding/RemoveCssClassStyleCommand.java
new file mode 100755
index 00000000000..11ea8743fb9
--- /dev/null
+++ b/plugins/infra/gmfdiag/css/org.eclipse.papyrus.infra.gmfdiag.css.properties/src/org/eclipse/papyrus/infra/gmfdiag/css/properties/databinding/RemoveCssClassStyleCommand.java
@@ -0,0 +1,74 @@
+/*****************************************************************************
+ * Copyright (c) 2017 CEA LIST 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
+ * http://www.eclipse.org/legal/epl-v10.html
+ *
+ * Contributors:
+ *   CEA LIST - Initial API and implementation
+ *   
+ *****************************************************************************/
+
+package org.eclipse.papyrus.infra.gmfdiag.css.properties.databinding;
+
+import java.util.Collection;
+import java.util.Collections;
+
+import org.eclipse.emf.common.command.Command;
+import org.eclipse.emf.transaction.RecordingCommand;
+import org.eclipse.emf.transaction.TransactionalEditingDomain;
+import org.eclipse.gmf.runtime.notation.NotationPackage;
+import org.eclipse.gmf.runtime.notation.StringListValueStyle;
+import org.eclipse.gmf.runtime.notation.View;
+import org.eclipse.papyrus.infra.gmfdiag.css.notation.CSSStyles;
+
+/**
+ * @author Quentin Le Menez
+ *
+ */
+public class RemoveCssClassStyleCommand extends RecordingCommand implements Command {
+
+	private Collection<View> views;
+
+	private String style;
+
+	/**
+	 * Constructor.
+	 *
+	 * @param namedStyle
+	 * @param newValue
+	 */
+	public RemoveCssClassStyleCommand(TransactionalEditingDomain domain, View view, String newValue) {
+		this(domain, Collections.singleton(view), newValue);
+	}
+
+	public RemoveCssClassStyleCommand(TransactionalEditingDomain domain, Collection<View> views, String style) {
+		super(domain);
+		this.views = views;
+		this.style = style;
+	}
+
+
+	/**
+	 * Remove the style to the existing list or do nothing if there are no styles applied
+	 * 
+	 * @see org.eclipse.emf.transaction.RecordingCommand#doExecute()
+	 *
+	 */
+	@Override
+	protected void doExecute() {
+		for (View view : views) {
+			StringListValueStyle namedStyle = (StringListValueStyle) view.getNamedStyle(NotationPackage.eINSTANCE.getStringListValueStyle(), CSSStyles.CSS_GMF_CLASS_KEY);
+			if (namedStyle == null) {
+				// there is no style applied to this view
+				return;
+			}
+			if (style != null && namedStyle.getStringListValue().contains(style)) {
+				namedStyle.getStringListValue().remove(style);
+			}
+		}
+	}
+
+}