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/*
* Copyright (C) 2021 Apple Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS BE LIABLE FOR ANY
* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
* ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#pragma once
#include <optional>
namespace WebCore {
struct TextBoxSelectableRange {
const unsigned start;
const unsigned length;
const unsigned additionalLengthAtEnd { 0 };
const bool isLineBreak { false };
// FIXME: Consider holding onto the truncation position instead. See webkit.org/b/164999
const std::optional<unsigned> truncation { };
unsigned clamp(unsigned offset) const
{
auto clampedOffset = std::clamp(offset, start, start + length) - start;
// FIXME: For some reason we allow the caret move to (invisible) fully truncated text. The zero test is to keep that behavior.
if (truncation && *truncation)
return std::min<unsigned>(clampedOffset, *truncation);
if (clampedOffset == length)
clampedOffset += additionalLengthAtEnd;
return clampedOffset;
}
std::pair<unsigned, unsigned> clamp(unsigned startOffset, unsigned endOffset) const
{
return { clamp(startOffset), clamp(endOffset) };
}
bool intersects(unsigned startOffset, unsigned endOffset) const
{
return clamp(startOffset) < clamp(endOffset);
}
};
}
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