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56 lines
1.6 KiB
C
56 lines
1.6 KiB
C
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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
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*
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#ifndef DirectionalityUtils_h___
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#define DirectionalityUtils_h___
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class nsIContent;
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class nsIDocument;
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class nsINode;
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namespace mozilla {
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namespace dom {
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class Element;
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} // namespace dom
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} // namespace mozilla
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namespace mozilla {
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namespace directionality {
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enum Directionality {
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eDir_NotSet = 0,
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eDir_RTL = 1,
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eDir_LTR = 2
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};
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/**
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* Set the directionality of an element according to the algorithm defined at
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* http://www.whatwg.org/specs/web-apps/current-work/multipage/elements.html#the-directionality,
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* not including elements with auto direction.
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*
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* @return the directionality that the element was set to
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*/
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Directionality RecomputeDirectionality(mozilla::dom::Element* aElement,
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bool aNotify = true);
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/**
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* Set the directionality of any descendants of a node that do not themselves
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* have a dir attribute.
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* For performance reasons we walk down the descendant tree in the rare case
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* of setting the dir attribute, rather than walking up the ancestor tree in
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* the much more common case of getting the element's directionality.
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*/
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void SetDirectionalityOnDescendants(mozilla::dom::Element* aElement,
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Directionality aDir,
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bool aNotify = true);
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} // end namespace directionality
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} // end namespace mozilla
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#endif /* DirectionalityUtils_h___ */
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