How to check whether editor is active while popup in eclipse? - eclipse

Question

I am working on a project in which I need to show a popup menu for files having particular extensions only and from popup of editor window and project explorer.
Following is the plugin.xml file that I have made:
<menuContribution
locationURI="popup:org.eclipse.ui.popup.any">
<command
commandId="abc.contextMenu"
label="Open"
mnemonic="P"
style="push">
<visibleWhen
checkEnabled="false">
<or>
<with
variable="selection">
<iterate
ifEmpty="false">
<reference
definitionId="com.varun.ease.ui.sign.definition.testType">
</reference>
</iterate>
</with>
<with
variable="activeEditorInput">
<and>
<test
property="org.eclipse.ui.IWorkbenchPart"
value="true">
</test>
<reference
definitionId="com.varun.ease.ui.sign.definition.testType">
</reference>
</and>
</with>
</or>
</visibleWhen>
</command>
</menuContribution>
<extension
point="org.eclipse.core.expressions.definitions">
<definition
id="com.varun.ease.ui.sign.definition.testType">
<adapt
type="org.eclipse.core.resources.IFile">
<or>
<test
property="org.eclipse.core.resources.name"
value="*.py">
</test>
<test
property="org.eclipse.core.resources.name"
value="*.js">
</test>
</or>
</adapt>
</definition>
I want to show command either only when editor is active i.e. it is having focus in window or during selection of project from project explorer.
What should I do to check whether editor is active part i.e. whether it is having focus in window?
Currently I am using <test/> with org.eclipse.ui.IWorkbenchPart property but command is not at all visible in popup of editor window.
Running without that property, command is even shown when appropriate file is open in editor though not active and popup is opened from project explorer not from appropriate file.
Thanks for the help
EDIT
Updated code after successfully running command for editor as directed by #greg-449. But now, command is not visible when trying to restrict to particular file types.
<visibleWhen
checkEnabled="false">
<or>
<with
variable="selection">
<iterate
ifEmpty="false">
<reference
definitionId="com.varun.ease.ui.sign.definition.testType">
</reference>
</iterate>
</with>
<with
variable="activePart">
<and>
<reference
definitionId="com.varun.ease.ui.sign.definition.testType">
</reference>
<instanceof
value="org.eclipse.ui.IEditorPart">
</instanceof>
</and>
</with>
</or>
</visibleWhen>

Answer 1

Use activePart and test for an instance of the editor class.
So:
<with
variable="activePart">
<instanceof
value="org.eclipse.ui.IEditorPart">
</instanceof>
</with>
Tests for any editor.
You can also use activePartId to test against an editor id.
If you want to test the editor input as well you will need to use an <and>:
<and>
<with
variable="activePart">
<instanceof
value="org.eclipse.ui.IEditorPart">
</instanceof>
</with>
<with
variable="activeEditorInput">
<reference
definitionId="com.varun.ease.ui.sign.definition.testType">
</reference>
</with>
</and>

Answer 2

Check whether editor is active or not using rcp eclipse
public class Stud_editor_open extends AbstractHandler{
#Override
public Object execute(ExecutionEvent event) throws ExecutionException {
IWorkbenchWindow window = HandlerUtil.getActiveWorkbenchWindow(event);
IWorkbenchPage page = window.getActivePage();
IEditorReference[] editors = page.getEditorReferences();
// How many editor open..
// System.out.println("Length : "+editors.length);
if(editors.length==0){
System.out.println("Editor is not an active");
}else{
System.out.println("Editor is an active");
System.out.println("Editor Name is :: "+page.getActiveEditor().getTitle());
}
}
List out open editor
Multiple Editor open at time not dublicate or reopen new editor
for (int i=0; i<editors.length; i++) {
//page.activate(editors[i].getEditor(true));
System.out.println("Editor Name :"+editors[i].getTitle().toString());
return null;
}