Add possibility to set gstreamer commands in preferences.

If there is a need to add more arguments to gstreamer default commands user has to add them to every new created project in proper wizard window.
It improves user experience by creating a possiblity to set additional gstreamer commands in preferences window as they are common for all project and user doesn't need to repeat them every time during creating new project

Signed-off-by: Emilia Dominiak <emilia.dominiak@intel.com>

Author: edominia

org.sofproject.gst.topo/plugin.xml

@@ -40,4 +40,11 @@
             class="org.sofproject.gst.topo.ops.GstOpsProvider">
       </provider>
    </extension>
+   <extension
+      point="org.eclipse.ui.preferencePages">
+       <page id="org.sofproject.gst.topo.ui.preferences.gstcommandspreferences"
+	    class="org.sofproject.gst.topo.ui.preferences.GstCommandsPreferences"
+            name="GStreamer commands">
+       </page>
+   </extension>
 </plugin>

org.sofproject.gst.topo/src/org/sofproject/gst/topo/ui/preferences/GstCommandsPreferences.java

@@ -0,0 +1,85 @@
+/*
+ * Copyright (c) 2019, Intel Corporation
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *   * Redistributions of source code must retain the above copyright
+ *     notice, this list of conditions and the following disclaimer.
+ *   * Redistributions in binary form must reproduce the above copyright
+ *     notice, this list of conditions and the following disclaimer in the
+ *     documentation and/or other materials provided with the distribution.
+ *   * Neither the name of the Intel Corporation nor the
+ *     names of its contributors may be used to endorse or promote products
+ *     derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+package org.sofproject.gst.topo.ui.preferences;
+
+import org.eclipse.core.runtime.preferences.InstanceScope;
+import org.eclipse.jface.preference.FieldEditorPreferencePage;
+import org.eclipse.jface.preference.IPreferenceStore;
+import org.eclipse.jface.preference.StringFieldEditor;
+import org.eclipse.ui.IWorkbench;
+import org.eclipse.ui.IWorkbenchPreferencePage;
+import org.eclipse.ui.preferences.ScopedPreferenceStore;
+
+public class GstCommandsPreferences extends FieldEditorPreferencePage implements IWorkbenchPreferencePage {
+
+	StringFieldEditor gstInspectfieldEditor;
+	StringFieldEditor gstLaunchfieldEditor;
+
+	public GstCommandsPreferences() {
+		super(GRID);
+		setDescription("Set custom GStreamer commands");
+	}
+
+	@Override
+	public boolean performOk() {
+		if (gstLaunchfieldEditor.getStringValue().equals("")) {
+			setErrorMessage("gst-launch command cannot be empty");
+			return false;
+		}
+
+		if (gstInspectfieldEditor.getStringValue().equals("")) {
+			setErrorMessage("gst-inspect command cannot be empty");
+			return false;
+		}
+		return super.performOk();
+	}
+
+	@Override
+	public void init(IWorkbench workbench) {
+		IPreferenceStore store = new ScopedPreferenceStore(InstanceScope.INSTANCE,
+				"org.sofproject.gst.topo.ui.preferences");
+
+		store.setDefault(GstCommandsPreferencesConst.GST_INSPECT, "gst-inspect-1.0");
+		store.setDefault(GstCommandsPreferencesConst.GST_LAUNCH, "gst-launch-1.0");
+
+		setPreferenceStore(store);
+	}
+
+	@Override
+	protected void createFieldEditors() {
+		gstInspectfieldEditor = new StringFieldEditor(GstCommandsPreferencesConst.GST_INSPECT, "Gst-inspect command: ",
+				getFieldEditorParent());
+		addField(gstInspectfieldEditor);
+
+		gstLaunchfieldEditor = new StringFieldEditor(GstCommandsPreferencesConst.GST_LAUNCH, "Gst-launch command: ",
+				getFieldEditorParent());
+		addField(gstLaunchfieldEditor);
+	}
+}

org.sofproject.gst.topo/src/org/sofproject/gst/topo/ui/preferences/GstCommandsPreferencesConst.java

@@ -0,0 +1,35 @@
+/*
+ * Copyright (c) 2019, Intel Corporation
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *   * Redistributions of source code must retain the above copyright
+ *     notice, this list of conditions and the following disclaimer.
+ *   * Redistributions in binary form must reproduce the above copyright
+ *     notice, this list of conditions and the following disclaimer in the
+ *     documentation and/or other materials provided with the distribution.
+ *   * Neither the name of the Intel Corporation nor the
+ *     names of its contributors may be used to endorse or promote products
+ *     derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+package org.sofproject.gst.topo.ui.preferences;
+
+public class GstCommandsPreferencesConst {
+	public static final String GST_LAUNCH = "gstLaunch";
+	public static final String GST_INSPECT = "gstInspect";
+}

org.sofproject.gst.topo/src/org/sofproject/gst/topo/ui/wizards/GstNodeNewPage.java

@@ -29,6 +29,7 @@
 
 package org.sofproject.gst.topo.ui.wizards;
 
+import org.eclipse.core.runtime.Platform;
 import org.eclipse.jface.dialogs.Dialog;
 import org.eclipse.jface.wizard.WizardPage;
 import org.eclipse.swt.SWT;
@@ -78,7 +79,7 @@ public void createControl(Composite parent) {
         data.grabExcessHorizontalSpace = true;
         gstInspectToolCmd = new Text(inspectGroup, SWT.BORDER);
         gstInspectToolCmd.setLayoutData(data);
-        gstInspectToolCmd.setText(gstNode.getGstInspectToolCmd());
+        gstInspectToolCmd.setText(Platform.getPreferencesService().getString("org.sofproject.gst.topo.ui.preferences", "gstInspect", gstNode.getGstInspectToolCmd(), null));
         gstInspectToolCmd.addListener(SWT.Modify, confModifyListener);
 
 		Composite launchGroup = new Composite(control, SWT.NONE);
@@ -91,7 +92,7 @@ public void createControl(Composite parent) {
 		data.grabExcessHorizontalSpace = true;
 		gstLaunchToolCmd = new Text(launchGroup, SWT.BORDER);
 		gstLaunchToolCmd.setLayoutData(data);
-		gstLaunchToolCmd.setText(gstNode.getGstLaunchToolCmd());
+		gstLaunchToolCmd.setText(Platform.getPreferencesService().getString("org.sofproject.gst.topo.ui.preferences", "gstLaunch", gstNode.getGstLaunchToolCmd(), null));
 		gstLaunchToolCmd.addListener(SWT.Modify, confModifyListener);
 
 		setControl(control);