gecko-dev/layout/base/nsIStyleSheetService.idl

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 * Version: MPL 1.1/GPL 2.0/LGPL 2.1
 *
 * The contents of this file are subject to the Mozilla Public License Version
 * 1.1 (the "License"); you may not use this file except in compliance with
 * the License. You may obtain a copy of the License at
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 * for the specific language governing rights and limitations under the
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 * The Original Code is Mozilla.
 *
 * The Initial Developer of the Original Code is
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 * Portions created by the Initial Developer are Copyright (C) 2005
 * the Initial Developer. All Rights Reserved.
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 * Contributor(s):
 *  Brian Ryner <bryner@brianryner.com>
 *
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/* interface for managing user and user-agent style sheets */

#include "nsISupports.idl"

interface nsIURI;

/*
 * nsIStyleSheetService allows extensions or embeddors to add to the
 * built-in list of user or agent style sheets.
 */

[scriptable, uuid(1f42a6a2-ab0a-45d4-8a96-396f58ea6c6d)]
interface nsIStyleSheetService : nsISupports
{
  const unsigned long AGENT_SHEET = 0;
  const unsigned long USER_SHEET = 1;

  /**
   * 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);

  /**
   * 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);
};