Theme switching

[FrD]

Hi,

I'm trying to figure out how theme switching works.

I've found$:/core/modules/pluginswitcher.js  and where the theme manager is started ($:/core/modules/startup.js).

What I can't find is how the tiddlers related to the "previous" theme are deleted (?) or removed (?) from the store.

I can see that they are "unregistered" and then I loose their trail ...

If somebody could fill the blanks ...

Thanks

Regards

FrD

[Jeremy Ruston]

Hi FrD

On 20 Dec 2018, at 11:33, FrD <soku...@gmail.com> wrote:

Hi,

I'm trying to figure out how theme switching works.

I've found$:/core/modules/pluginswitcher.js  and where the theme manager is started ($:/core/modules/startup.js).

What I can't find is how the tiddlers related to the "previous" theme are deleted (?) or removed (?) from the store.

I can see that they are "unregistered" and then I loose their trail …

You’ve found the right place: there are two instances of the plugin switcher, one for themes and one for languages.

At a high level, each time a plugin is switched in or out (e.g. as the result of the theme or language being changed), the system rebuilds the cache of shadow tiddlers by re-reading the tiddlers from each of the active plugins. So, when we switch from one theme to another the shadow tiddlers from the old theme are not included in the new cache of shadow tiddlers.

Best wishes

Jeremy.

If somebody could fill the blanks ...

Thanks

Regards

FrD

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[FrD]

Hi Jeremy,

Thanks for your quick answer. I see now that the call to unpackPluginTiddlers does the job !

	// Unpack the current theme tiddlers
	$tw.wiki.unpackPluginTiddlers();

My mistake was to believe it was "unpacking" only the new theme tiddlers. But I can see it re-builds the cache of shadow tiddlers from all "active" plugins.

Thanks and regards

FrD