How to customize HTML title for a specific BrowserView

Plone Support Add-on Development
1

I've created a BrowserView called "foo" registered for "*". So, wherever the user appends /@@foo to the URL, it will view it.

My template has all the code filling the slots in the main template macros. The only thing I couldn't figure out is how to customize the HTML title tag (the one in the head element).

Looks like there is no slot for it, and the only docs I found tell about overriding the plone.htmlhead.title viewlet.

Isn't there a simpler solution? If not, how do I override the default viewlet for only my BrowserView (or only the template it uses)?

3

Maybe he means the HTML title tag, not the document title in the body.
In that case: there's no viewlet for that.

You can do it with Diazo in the same way Plone 5 display the "hero" banner in the front-page when you create a new site: you can copy the title content from another section of the page (a new viewlet?), then drop it. Or call a view on the context that returns the new title.

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4

@keul That's exactly what I am trying to do.

I could put a method in my view to return the value, but how do I insert the value in the HTML? Do I necessarily need to use Diazo?

(I am trying to avoid to use Diazo because creating a theme and a transformation XML seems like overkill to me, just for the sake of altering a bit of content in a HTML tag).

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5

I partially agree: using Diazo for such tasks seems a little hacky to me but it's not about performance: XSL tranformations are fast.
I think this is the quicker way; you can override the main_template probably... but isn't this ugly too?

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6

And what about registering a viewlet override for a specific template or view? Is it possible?

If so, I could customize plone.htmlhead.title for my foo view, right?

7

Upss... sorry. Wrong answer... title tag is not in the main_template.

You need simply to override the plone.htmlhead.title!
And yes, you can do it only for your view:

<browser:viewlet
            name="plone.htmlhead.title"
            manager="plone.app.layout.viewlets.interfaces.IHtmlHead"
            class="plone.app.layout.viewlets.common.TitleViewlet"
            view="your.package.IViewInterface"
            permission="zope2.View"
            />
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8

If you plan to use more than a Plone site in your Zope instance, don't forget to add a layer as well. Check the docs for more info:

http://docs.plone.org/develop/plone/views/layers.html

9

My "foo" BrowserView was going to be used in only one or two cases, and rarely, so I didn't feel like going all away to define a theme for my add-on.

The final solution was to create a subclass of ViewletBase in the same module of my BrowserView class, to create a method in the BrowserView to provide the values for the title tag, and a snippet for the registration of the plone.htmlhead.title override.

Thank you all for your help.

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