michael@0: /* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
michael@0: /* This Source Code Form is subject to the terms of the Mozilla Public
michael@0:  * License, v. 2.0. If a copy of the MPL was not distributed with this
michael@0:  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
michael@0: 
michael@0: /* interface for managing user and user-agent style sheets */
michael@0: 
michael@0: #include "nsISupports.idl"
michael@0: 
michael@0: interface nsIURI;
michael@0: 
michael@0: /*
michael@0:  * nsIStyleSheetService allows extensions or embeddors to add to the
michael@0:  * built-in list of user or agent style sheets.
michael@0:  */
michael@0: 
michael@0: [scriptable, uuid(1f42a6a2-ab0a-45d4-8a96-396f58ea6c6d)]
michael@0: interface nsIStyleSheetService : nsISupports
michael@0: {
michael@0:   const unsigned long AGENT_SHEET = 0;
michael@0:   const unsigned long USER_SHEET = 1;
michael@0:   const unsigned long AUTHOR_SHEET = 2;
michael@0: 
michael@0:   /**
michael@0:    * Synchronously loads a style sheet from |sheetURI| and adds it to the list
michael@0:    * of user or agent style sheets.
michael@0:    *
michael@0:    * A user sheet loaded via this API will come before userContent.css and
michael@0:    * userChrome.css in the cascade (so the rules in it will have lower
michael@0:    * precedence than rules in those sheets).
michael@0:    *
michael@0:    * An agent sheet loaded via this API will come after ua.css in the cascade
michael@0:    * (so the rules in it will have higher precedence than rules in ua.css).
michael@0:    *
michael@0:    * The relative ordering of two user or two agent sheets loaded via
michael@0:    * this API is undefined.
michael@0:    *
michael@0:    * Sheets added via this API take effect on all documents, including
michael@0:    * already-loaded ones, immediately.
michael@0:    */
michael@0:   void loadAndRegisterSheet(in nsIURI sheetURI, in unsigned long type);
michael@0: 
michael@0:   /**
michael@0:    * Returns true if a style sheet at |sheetURI| has previously been
michael@0:    * added to the list of style sheets specified by |type|.
michael@0:    */
michael@0:   boolean sheetRegistered(in nsIURI sheetURI, in unsigned long type);
michael@0: 
michael@0:   /**
michael@0:    * Remove the style sheet at |sheetURI| from the list of style sheets
michael@0:    * specified by |type|.  The removal takes effect immediately, even for
michael@0:    * already-loaded documents.
michael@0:    */
michael@0:   void unregisterSheet(in nsIURI sheetURI, in unsigned long type);
michael@0: };