XPages favicon with oneui theme - xpages

Question

I want to set a favicon in XPages. I am using Domino 8.5.3 with the latest 8.5.x version of the extlib. As application theme oneuiv2.1 is used.
I tried setting the pageIcon attribute in the XPage without success. Adding a link attribute to the header using
<xp:this.resources>
<xp:headTag tagName="link" rendered="true" loaded="true">
<xp:this.attributes>
<xp:parameter name="rel" value="icon"></xp:parameter>
<xp:parameter name="href" value="favIcon.png">
</xp:parameter>
<xp:parameter name="type" value="image/png">
</xp:parameter>
</xp:this.attributes>
</xp:headTag>
</xp:this.resources>
did not change the favicon. I found in various blogs, that I have to add a control to the application theme, for example:
<control>
<property>
<name>pageIcon</name>
<value>favicon.ico</value>
</property>
</control>
However I use the provided oneUi theme and do not want to create a custom theme. Is there a way to either set the favicon directly or modify the theme without creating a complete new one?

Answer 1

I think you are missing the control name in your theme rule.
Here is the syntax of the theme rule that works for me. (Taken from Tim Tripcony's HowYaBean demo application referenced on NotesIn9 and downloadable from here). I use it a ton. It takes the icon from the NotesDatabase (remember the one from the old Notes workspace that has not yet been pried out of my cold dead fingers). It also works with image or file resources.
<control override="false">
<name>ViewRoot</name>
<property>
<name>pageIcon</name>
<value>/$icon</value>
</property>
<property>
<name>pageTitle</name>
<value>#{database.title}</value>
</property>
</control>

Answer 2

This works for me - icon shows in tab bar and shortcut created from application URL.
Image resource (PNG image) with name img_ApplicationIcon16. The name is generic for every application, but each NSF contains different image.
Every XPage has property pageIcon="/img_ApplicationIcon16"
It renders as <link rel="SHORTCUT ICON" href="/path/database.nsf/img_ApplicationIcon16">
In my case, I did not want to use theme, too.

Answer 3

Import the favicon.ico file as file resource instead of image resource
Add the following code to the selected theme:
<control>
<name>ViewRoot</name>
<property>
<name>pageIcon</name>
<value>/favicon.ico</value>
</property>
</control>
Set up the application to use the theme containing the reference for the favicon.
Create a new xpage for testing, or delete the browser cache.
This works for me properly. In the browser window you should see the folloving source:
<link rel="SHORTCUT ICON" href="/db.nsf/favicon.ico">
(db.nsf is your database.)
If still not work check the xpage: "All properties-styling-disableTheme" should not be enabled.