/usr/share/idl/thunderbird/nsIInlineSpellChecker.idl is in thunderbird-dev 1:52.8.0-1~deb8u1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 | /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* 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/. */
#include "nsISupports.idl"
#include "domstubs.idl"
interface nsISelection;
interface nsIEditor;
interface nsIEditorSpellCheck;
[scriptable, uuid(b7b7a77c-40c4-4196-b0b7-b0338243b3fe)]
interface nsIInlineSpellChecker : nsISupports
{
  readonly attribute nsIEditorSpellCheck spellChecker;
  void init(in nsIEditor aEditor);
  void cleanup(in boolean aDestroyingFrames);
  attribute boolean enableRealTimeSpell;
  void spellCheckAfterEditorChange(in long aAction,
                                   in nsISelection aSelection,
                                   in nsIDOMNode aPreviousSelectedNode,
                                   in long aPreviousSelectedOffset,
                                   in nsIDOMNode aStartNode,
                                   in long aStartOffset,
                                   in nsIDOMNode aEndNode,
                                   in long aEndOffset);
  void spellCheckRange(in nsIDOMRange aSelection);
  nsIDOMRange getMisspelledWord(in nsIDOMNode aNode, in long aOffset);
  void replaceWord(in nsIDOMNode aNode, in long aOffset, in AString aNewword);
  void addWordToDictionary(in AString aWord);
  void removeWordFromDictionary(in AString aWord);
  void ignoreWord(in AString aWord);
  void ignoreWords([array, size_is(aCount)] in wstring aWordsToIgnore, in unsigned long aCount);
  void updateCurrentDictionary();
  readonly attribute boolean spellCheckPending;
};
%{C++
#define MOZ_INLINESPELLCHECKER_CONTRACTID "@mozilla.org/spellchecker-inline;1"
%}
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