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/*
* Copyright (C) 2003, 2009, 2016 Apple Inc. All rights reserved.
*
* Portions are Copyright (C) 1998 Netscape Communications Corporation.
*
* Other contributors:
* Robert O'Callahan <roc+@cs.cmu.edu>
* David Baron <dbaron@fas.harvard.edu>
* Christian Biesinger <cbiesinger@web.de>
* Randall Jesup <rjesup@wgate.com>
* Roland Mainz <roland.mainz@informatik.med.uni-giessen.de>
* Josh Soref <timeless@mac.com>
* Boris Zbarsky <bzbarsky@mit.edu>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*
* Alternatively, the contents of this file may be used under the terms
* of either the Mozilla Public License Version 1.1, found at
* http://www.mozilla.org/MPL/ (the "MPL") or the GNU General Public
* License Version 2.0, found at http://www.fsf.org/copyleft/gpl.html
* (the "GPL"), in which case the provisions of the MPL or the GPL are
* applicable instead of those above. If you wish to allow use of your
* version of this file only under the terms of one of those two
* licenses (the MPL or the GPL) and not to allow others to use your
* version of this file under the LGPL, indicate your decision by
* deletingthe provisions above and replace them with the notice and
* other provisions required by the MPL or the GPL, as the case may be.
* If you do not delete the provisions above, a recipient may use your
* version of this file under any of the LGPL, the MPL or the GPL.
*/
#pragma once
namespace WTF {
class TextStream;
}
namespace WebCore {
struct ScrollAlignment {
enum class Behavior {
NoScroll,
AlignCenter,
AlignTop,
AlignBottom,
AlignLeft,
AlignRight,
AlignToClosestEdge
};
Behavior getVisibleBehavior() const { return m_rectVisible; }
Behavior getPartialBehavior() const { return m_rectPartial; }
Behavior getHiddenBehavior() const { return m_rectHidden; }
void disableLegacyHorizontalVisibilityThreshold() { m_enableLegacyHorizontalVisibilityThreshold = false; }
bool legacyHorizontalVisibilityThresholdEnabled() const { return m_enableLegacyHorizontalVisibilityThreshold; }
static const ScrollAlignment alignCenterIfNotVisible;
static const ScrollAlignment alignToEdgeIfNotVisible;
WEBCORE_EXPORT static const ScrollAlignment alignCenterIfNeeded;
WEBCORE_EXPORT static const ScrollAlignment alignToEdgeIfNeeded;
WEBCORE_EXPORT static const ScrollAlignment alignCenterAlways;
static const ScrollAlignment alignTopAlways;
static const ScrollAlignment alignRightAlways;
static const ScrollAlignment alignLeftAlways;
static const ScrollAlignment alignBottomAlways;
Behavior m_rectVisible;
Behavior m_rectHidden;
Behavior m_rectPartial;
bool m_enableLegacyHorizontalVisibilityThreshold { true };
};
WEBCORE_EXPORT WTF::TextStream& operator<<(WTF::TextStream&, ScrollAlignment::Behavior);
WEBCORE_EXPORT WTF::TextStream& operator<<(WTF::TextStream&, const ScrollAlignment&);
}; // namespace WebCore
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