/* This Source Code Form is subject to the terms of the Mozilla Public
* License , v . 2 . 0 . If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
/* interface for managing user and user-agent style sheets */
#include "nsISupports.idl"
interface nsIPreloadedStyleSheet;
interface nsIURI;
/*
* nsIStyleSheetService allows extensions or embeddors to add to the
* built - in list of user or agent style sheets .
*/
[scriptable, uuid(
4 de68896-e8eb-
41 de-
8237 -a797b570ac4a)]
interface nsIStyleSheetService : nsISupports
{
const unsigned long AGENT_SHEET =
0 ;
const unsigned long USER_SHEET =
1 ;
const unsigned long AUTHOR_SHEET =
2 ;
/**
* Synchronously loads a style sheet from | sheetURI | and adds it to the list
* of user or agent style sheets .
*
* A user sheet loaded via this API will come before userContent . css and
* userChrome . css in the cascade ( so the rules in it will have lower
* precedence than rules in those sheets ) .
*
* An agent sheet loaded via this API will come after ua . css in the cascade
* ( so the rules in it will have higher precedence than rules in ua . css ) .
*
* The relative ordering of two user or two agent sheets loaded via
* this API is undefined .
*
* Sheets added via this API take effect on all documents , including
* already - loaded ones , immediately .
*/
void loadAndRegisterSheet(in nsIURI sheetURI, in
unsigned long type);
/**
* Returns true if a style sheet at | sheetURI | has previously been
* added to the list of style sheets specified by | type | .
*/
boolean sheetRegistered(in nsIURI sheetURI, in
unsigned long type);
/**
* Synchronously loads a style sheet from | sheetURI | and returns the
* new style sheet object . Can be used with nsIDOMWindowUtils . addSheet .
*/
nsIPreloadedStyleSheet preloadSheet(in nsIURI sheetURI,
in
unsigned long type);
/**
* Asynchronously loads a style sheet from | sheetURI | and returns a Promise
* which resolves to the new style sheet object , which can be used with
* nsIDOMWindowUtils . addSheet , when it has completed loading .
*/
[implicit_jscontext]
jsval preloadSheetAsync(in nsIURI sheetURI, in
unsigned long type);
/**
* Remove the style sheet at | sheetURI | from the list of style sheets
* specified by | type | . The removal takes effect immediately , even for
* already - loaded documents .
*/
void unregisterSheet(in nsIURI sheetURI, in
unsigned long type);
};
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(vorverarbeitet am 2026-08-25)
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