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#include "nsISupports.idl"


[scriptable, uuid(4805e682-49b9-11d3-9ce4-ed60bd6cb5bc)]


interface nsIEditorStyleSheets : nsISupports
{
  /** load and apply the style sheet, specified by aURL, to
    * the editor's document. This can involve asynchronous
    * network I/O
    * @param aURL         The style sheet to be loaded and applied.
    * @param aStyleSheet  Optional: if not null, return the style sheet created from aURL
    */
  void ApplyStyleSheet([const]in wstring, out nsICSSStyleSheet **aStyleSheet);

  /** load and apply an Override style sheet, specified by aURL, to
    * the editor's document. 
    * IMPORTANT: This is assumed to be synchronous:
    *            URL is a local file with no @import used
    * This action is not undoable.
    * It is not intended for use by "user", only editor developers
    *   to change display behavior for editing (like showing special cursors)
    *   that will not be affected by loading other "document" style sheets
    *   loaded using ApplyStyleSheet.
    *
    * @param aURL         The style sheet to be loaded and applied.
    * @param aStyleSheet  Optional: if not null, return the style sheet created from aURL
    */
  NS_IMETHOD ApplyOverrideStyleSheet(const nsString& aURL, nsICSSStyleSheet **aStyleSheet)=0;

  /** Add the given Style Sheet to the editor's document
    * This is always synchronous
    * @param aSheet  The style sheet to be  applied.
    */
  NS_IMETHOD AddStyleSheet(nsICSSStyleSheet* aSheet)=0;

  /** Remove the given Style Sheet from the editor's document
    * This is always synchronous
    * @param aSheet  The style sheet to be removed
    */
  NS_IMETHOD RemoveStyleSheet(nsICSSStyleSheet* aSheet)=0;

  /** Remove the given Override Style Sheet from the editor's document
    * This is always synchronous
    * @param aSheet  The style sheet to be removed.
    */
  NS_IMETHOD RemoveOverrideStyleSheet(nsICSSStyleSheet* aSheet)=0;

};