Created attachment 176772 [details]
A small extension for tests

I confirm for LO windows :
Version: 7.2.4.1 (x64) / LibreOffice Community
Build ID: 27d75539669ac387bb498e35313b970b7fe9c4f9
CPU threads: 8; OS: Windows 10.0 Build 19041; UI render: Skia/Vulkan; VCL: win
Locale: fr-FR (fr_FR); UI: fr-FR
Calc: CL

Hello,
Follow View -> User Interface 
Choose Tabbed and Apply to all.
And then follow Extension.
The epub icons must be visible only with Writer.
Or they are visible with all other components Calc, Draw, etc.
That is the problem.

The code in Addon_new.xcu is :
<node oor:name="m1" oor:op="replace">
                        <prop oor:name="Context" oor:type="xs:string">
                            <value>com.sun.star.text.TextDocument</value>
                        </prop>
                        <prop oor:name="URL" oor:type="xs:string">
                            <value>macro:///writer2epub.A_main.writer2epubMain</value>
                        </prop>
                        <prop oor:name="ImageIdentifier" oor:type="xs:string">
                            <value>%origin%/icons/logo</value>
                        </prop>
                        <prop oor:name="Title" oor:type="xs:string">
                            <value>writer2epub</value>
                        </prop>
                        <prop oor:name="Target" oor:type="xs:string">
                            <value>_self</value>
                        </prop>
                    </node>
The Context is only "com.sun.star.text.TextDocument", so icons must visible ONLY with Writer.

I don't know if this setting you have here should apply just for writer or not, but I confirm that this extension is seen also in Calc, Draw, etc

We have to wait for someone with more experience in extensions.

Version: 7.2.4.1 / LibreOffice Community
Build ID: 27d75539669ac387bb498e35313b970b7fe9c4f9
CPU threads: 4; OS: Linux 5.11; UI render: default; VCL: gtk3
Locale: ro-RO (ro_RO.UTF-8); UI: en-US
Calc: threaded

Do you know how to use this extension in default view in LibreOffice?

Hello,

The belowed extension comes as example from this "official" page : https://wiki.documentfoundation.org/Development/NotebookBar/Extensions

If you want to use Epub with Standard Interface (not Tabbed) you have to dowload it here : https://extensions.libreoffice.org/en/extensions/show/writer2epub

Unfortunatly, that will not fix the bug.

Have a nice day.

In OSS you may fix yourself, find or pay someone fix it - or just wait as long as it takes, days or decades. 

Here, http://writer2epub.it/download/ shows that extension is for LO 4, not updated. So this is a problem for extension developer. 

Not sure why you would use that, LO has Export as ePUB. 
Please see and if it's missing something, search existing bugs and report.

I don't use it, but I see some others: 
https://extensions.libreoffice.org/?q=epub

Hello,
The bug in not in writer2pub but in LibreOffice.
I get the same problem with an other extension, that a build myself ...

I do'nt understand you answer.

It's a real bug. 

Did you test the provided extension ?

Did you see, in Addon_new.xcu, the lines : 
<prop oor:name="Context" oor:type="xs:string">
     <value>com.sun.star.text.TextDocument</value>
</prop> ?

Did you see the notebookbar icons are visible in Writer (that's right) BUT in Calc and in all other modules (that's wrong) ?

Thanks for your answer.

The issue is not one relating to the epub extension per se, but rather why the Addon.xcu properties, which should limit display of an extensions icons to a particular module, e.g. Writer, are being ignored by the Notebookbar.

For those that don't know him, Didier is the developer of the Dmath extension, and is not a complete newb when it comes to developing extensions.

The question should be :

Why are the props being set in the XCU ignored by the Notebookbar? 

As the behaviour was confirmed in comment 5, setting as new.

@Didier: do all Writer-specific extensions suffer from this problem?

If not, then there must be something different in their respective Addon.xcu files, so that they are only displayed in Notebookbar in the correct module.

Is this linked to bug 103170 in any way?

I will try to look into this

Hello Everybody,

The joined extension is a reduced version of Dmaths 6.2 available for LO >= 7.1

There is 2 icons.

Choose View -> User Interface -> Standard Toolbar for all.

The red icon is visible in Calc, the yellow in Writer. That's right.

Choose View -> User Interface -> Tabbed for all.

In the extension menu, both icons are visible. That's wrong. Here is the problem.
For me it's a bug.

In Addons.xcu, org.openoffice.Office.addon.DMathsAddinNoteBookBar, I wrote :
<prop oor:name="Context" oor:type="xs:string">
<value>com.sun.star.sheet.SpreadsheetDocument</value>
</prop>
So the red icon should be visible only with Calc not in Writer

In Addons.xcu, org.openoffice.Office.addon.DMathsNoteBookBar, I wrote :
<prop oor:name="Context" oor:type="xs:string">
<value>com.sun.star.text.TextDocument</value>
</prop>
So the yellow icon should be visible only with Writer not in Calc

Thanks for all.

Created attachment 177935 [details]
Another extension for test

Hello,
Nobody to fix this bug ?
Best regards.

Hello,
Is there anyone to fix this bug ?
Thanks.
Didier.