456378 - provide an xpcom api to add user(agent) stylesheets to documents

Status: UNCONFIRMED

(Core :: DOM: Navigation, enhancement)

Description

[timeless]

we're trying to apply a stylesheet to a window

setup:
a given url may be loaded into multiple windows, and we may only wish to apply a style sheet to a single window.
(excludes @moz-document)

requirement:
the document's dom should not be mutated in order to apply the style sheet (excludes <link>/<style>)

conceptually this is something like a public AddCatalogStyleSheet/AddStyleSheet, but it needs to be public.

we're an embedder and do not want to use gecko internals. the method needs to be on a publicly reachable object. i.e. embedders use nsIWebBrowser to reach nsIDOMDocument and the API should be reachable from there so that both a gecko embedder and an extension could use this feature.

Comment 1

[David Baron :dbaron: (⌚️UTC-5, no longer working on Mozilla)]

I'm not sure if this belongs on something reachable from the document or on
http://mxr.mozilla.org/mozilla-central/source/layout/base/nsIStyleSheetService.idl

Comment 2

[Oleg Romashin (:romaxa)]

>/base/nsIStyleSheetService.idl

This API will apply style for all documents. we need only one window