adds blank entry for waveform viewer

plugins/com.minres.scviewer.database.fst/src/com/minres/scviewer/database/fst/FstLibrary.java

@@ -1,7 +1,6 @@
 package com.minres.scviewer.database.fst;
 
 import com.sun.jna.Native;
-import com.sun.jna.Platform;
 import com.sun.jna.Pointer;
 import com.sun.jna.Structure;
 import com.sun.jna.Structure.FieldOrder;

plugins/com.minres.scviewer.database.ftr/src/com/minres/scviewer/database/ftr/FtrDbLoader.java

@@ -33,7 +33,6 @@ import com.minres.scviewer.database.AssociationType;
 import com.minres.scviewer.database.DataType;
 import com.minres.scviewer.database.EventKind;
 import com.minres.scviewer.database.IWaveform;
-import com.minres.scviewer.database.IWaveformDb;
 import com.minres.scviewer.database.IWaveformDbLoader;
 import com.minres.scviewer.database.InputFormatException;
 import com.minres.scviewer.database.RelationType;

plugins/com.minres.scviewer.database.text/src/com/minres/scviewer/database/text/TextDbLoader.java

@@ -46,7 +46,6 @@ import com.minres.scviewer.database.AssociationType;
 import com.minres.scviewer.database.DataType;
 import com.minres.scviewer.database.EventKind;
 import com.minres.scviewer.database.IWaveform;
-import com.minres.scviewer.database.IWaveformDb;
 import com.minres.scviewer.database.IWaveformDbLoader;
 import com.minres.scviewer.database.InputFormatException;
 import com.minres.scviewer.database.RelationType;

plugins/com.minres.scviewer.database.vcd/src/com/minres/scviewer/database/vcd/VCDDbLoader.java

@@ -28,7 +28,6 @@ import com.minres.scviewer.database.BitVector;
 import com.minres.scviewer.database.DoubleVal;
 import com.minres.scviewer.database.IEventList;
 import com.minres.scviewer.database.IWaveform;
-import com.minres.scviewer.database.IWaveformDb;
 import com.minres.scviewer.database.IWaveformDbLoader;
 import com.minres.scviewer.database.InputFormatException;
 import com.minres.scviewer.database.RelationType;

plugins/com.minres.scviewer.database/src/com/minres/scviewer/database/BlankWaveform.java

@@ -0,0 +1,104 @@
+package com.minres.scviewer.database;
+
+import java.beans.PropertyChangeListener;
+import java.util.ArrayList;
+import java.util.List;
+
+public class BlankWaveform implements IWaveform {
+
+	@Override
+	public void addPropertyChangeListener(PropertyChangeListener l) {
+	}
+
+	@Override
+	public void removePropertyChangeListener(PropertyChangeListener l) {
+	}
+
+	@Override
+	public String getFullName() {
+		return "";
+	}
+
+	@Override
+	public String getName() {
+		return "";
+	}
+
+	@Override
+	public void setName(String name) {
+	}
+
+	@Override
+	public void setParent(IHierNode parent) {
+	}
+
+	@Override
+	public IHierNode getParent() {
+		return null;
+	}
+
+	@Override
+	public List<IHierNode> getChildNodes() {
+		return new ArrayList<>();
+	}
+
+	@Override
+	public void addChild(IHierNode child) {
+	}
+
+	@Override
+	public IDerivedWaveform deriveWaveform() {
+		return null;
+	}
+
+	@Override
+	public int compareTo(IHierNode o) {
+		return 1;
+	}
+
+	@Override
+	public long getId() {
+		return 0;
+	}
+
+	@Override
+	public boolean isSame(IWaveform other) {
+		return false;
+	}
+
+	@Override
+	public IEventList getEvents() {
+		return new EventList();
+	}
+
+	@Override
+	public IEvent[] getEventsAtTime(long time) {
+		return new IEvent[0];
+	}
+
+	@Override
+	public IEvent[] getEventsBeforeTime(long time) {
+		return new IEvent[0];
+	}
+
+	@Override
+	public WaveformType getType() {
+		return WaveformType.BLANK;
+	}
+
+	@Override
+	public String getKind() {
+		return "BLANK";
+	}
+
+	@Override
+	public int getRowCount() {
+		return 1;
+	}
+
+	@Override
+	public int getWidth() {
+		return 0;
+	}
+
+}

plugins/com.minres.scviewer.database/src/com/minres/scviewer/database/WaveformType.java

@@ -20,5 +20,7 @@ public enum WaveformType {
 	/** The transaction. */
 	TRANSACTION,
 	/** The filter. */
-	FILTER
+	FILTER,
+	/** The blank line. */
+	BLANK
 }

plugins/com.minres.scviewer.e4.application/Application.e4xmi

@@ -117,6 +117,7 @@
   <handlers xmi:id="_ru2NIEYEEeyPM8G0E2EYww" elementId="com.minres.scviewer.e4.application.handler.help" contributionURI="bundleclass://com.minres.scviewer.e4.application/com.minres.scviewer.e4.application.handlers.HelpHandler" command="_lqjIYEYEEeyPM8G0E2EYww"/>
   <handlers xmi:id="_TwU0IEYoEeyKK_icsY7Xjg" elementId="com.minres.scviewer.e4.application.handler.enabletxdetails" contributionURI="bundleclass://com.minres.scviewer.e4.application/com.minres.scviewer.e4.application.handlers.EnableTxDetails" command="_Fj1gQEYoEeyKK_icsY7Xjg"/>
   <handlers xmi:id="_htyxgHCOEeyub8CfGE1sGA" elementId="com.minres.scviewer.e4.application.handler.helpContent" contributionURI="bundleclass://com.minres.scviewer.e4.application/com.minres.scviewer.e4.application.handlers.HelpContentsHandler" command="_RdUMoHCOEeyub8CfGE1sGA"/>
+  <handlers xmi:id="__Ozu4LcxEe294PIiYLxpfA" elementId="com.minres.scviewer.e4.application.handler.add_blank" contributionURI="bundleclass://com.minres.scviewer.e4.application/com.minres.scviewer.e4.application.handlers.AddBlankWaveformHandler" command="_vYAOQLcxEe294PIiYLxpfA"/>
   <bindingTables xmi:id="_95PfvnNmEeWBq8z1Dv39LA" bindingContext="_95PfuXNmEeWBq8z1Dv39LA">
     <bindings xmi:id="_95Pfv3NmEeWBq8z1Dv39LA" elementId="com.minres.scviewer.e4.application.keybinding.quit" keySequence="M1+Q" command="_95PfvHNmEeWBq8z1Dv39LA">
       <tags>type:user</tags>
@@ -208,6 +209,9 @@
       <children xsi:type="menu:HandledMenuItem" xmi:id="_NnJA4BlEEeuiP60JNw0iiA" elementId="com.minres.scviewer.e4.application.handledmenuitem.search" label="Search Tx..." iconURI="platform:/plugin/com.minres.scviewer.e4.application/icons/find.png" command="_XDxTYBlEEeuiP60JNw0iiA">
         <visibleWhen xsi:type="ui:ImperativeExpression" xmi:id="_Se1voBlEEeuiP60JNw0iiA" contributionURI="bundleclass://com.minres.scviewer.e4.application/com.minres.scviewer.e4.application.handlers.SearchHandler"/>
       </children>
+      <children xsi:type="menu:HandledMenuItem" xmi:id="_NFfK0LcyEe294PIiYLxpfA" elementId="com.minres.scviewer.e4.application.handledmenuitem.add_blank" label="Add blank" command="_vYAOQLcxEe294PIiYLxpfA">
+        <parameters xmi:id="_or7iYLcyEe294PIiYLxpfA" elementId="com.minres.scviewer.e4.application.parameter.15" name="com.minres.scviewer.e4.application.commandparameter.add_blank" value="before"/>
+      </children>
     </menus>
     <toolbar xmi:id="_ReeeAE-DEeyuGJbYVZjX8w" elementId="com.minres.scviewer.e4.application.toolbar.3">
       <children xsi:type="menu:HandledToolItem" xmi:id="_GKi7IHcjEeWwZ-9vrAR2UQ" elementId="com.minres.scviewer.e4.application.handledtoolitem.previousevent" label="Previous Event" iconURI="platform:/plugin/com.minres.scviewer.e4.application/icons/previous-green.png" tooltip="Navigate to previous event in stream/waveform" command="_79rx4HabEeWwZ-9vrAR2UQ">
@@ -278,6 +282,9 @@
     <parameters xmi:id="_6KsZcHr9EeWVM_sKoXvptg" elementId="com.minres.scviewer.e4.application.command.addwaveform.where" name="where" optional="false"/>
     <parameters xmi:id="_7T1TcHwIEeWv0Y5uF2QN5w" elementId="com.minres.scviewer.e4.application.command.addwaveform.all" name="all" typeId="" optional="false"/>
   </commands>
+  <commands xmi:id="_vYAOQLcxEe294PIiYLxpfA" elementId="com.minres.scviewer.e4.application.command.add_blank" commandName="Add Blank Waveform">
+    <parameters xmi:id="_g_HnsLcyEe294PIiYLxpfA" elementId="com.minres.scviewer.e4.application.commandparameter.add_blank" name="where"/>
+  </commands>
   <commands xmi:id="_AxH6sIl_EeWxJ_wPkM6yGQ" elementId="org.eclipse.ui.window.preferences" commandName="Preferences"/>
   <commands xmi:id="_KlGlsIoNEeWxJ_wPkM6yGQ" elementId="com.minres.scviewer.e4.application.command.set_them" commandName="Set Theme Command">
     <parameters xmi:id="_O8Z9IIoNEeWxJ_wPkM6yGQ" elementId="com.minres.scviewer.e4.application.command.theme.parameter.id" name="themeId" optional="false"/>

plugins/com.minres.scviewer.e4.application/src/com/minres/scviewer/e4/application/handlers/AddBlankWaveformHandler.java

@@ -0,0 +1,51 @@
+/*******************************************************************************
+ * Copyright (c) 2023 MINRES Technologies GmbH 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:
+ *     MINRES Technologies GmbH - initial API and implementation
+ *******************************************************************************/
+
+package com.minres.scviewer.e4.application.handlers;
+
+import javax.inject.Named;
+
+import org.eclipse.e4.core.di.annotations.CanExecute;
+import org.eclipse.e4.core.di.annotations.Execute;
+import org.eclipse.e4.ui.workbench.modeling.EPartService;
+import org.eclipse.e4.ui.workbench.modeling.ESelectionService;
+import org.eclipse.jface.viewers.IStructuredSelection;
+
+import com.minres.scviewer.database.BlankWaveform;
+import com.minres.scviewer.database.IWaveform;
+import com.minres.scviewer.database.tx.ITx;
+import com.minres.scviewer.database.ui.TrackEntry;
+import com.minres.scviewer.e4.application.parts.WaveformViewer;
+
+public class AddBlankWaveformHandler {
+
+	public static final String PARAM_WHERE_ID="com.minres.scviewer.e4.application.commandparameter.add_blank"; //$NON-NLS-1$
+	
+	@CanExecute
+	public Boolean canExecute(ESelectionService selectionService){
+		Object sel = selectionService.getSelection();
+		if( sel instanceof IStructuredSelection) {
+			Object o= ((IStructuredSelection)sel).getFirstElement();
+			return o instanceof IWaveform || o instanceof ITx | o instanceof TrackEntry;
+		}
+		return false;
+	}
+	
+	@Execute
+	public void execute(@Named(PARAM_WHERE_ID) String where, EPartService partService) {
+		Object obj = partService.getActivePart().getObject();
+		if(obj instanceof WaveformViewer){
+			((WaveformViewer)obj).addStreamsToList(
+					new IWaveform[]{new BlankWaveform()}, "before".equalsIgnoreCase(where)); //$NON-NLS-1$
+		}
+	}
+
+}