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/*
* Copyright (C) 2007, 2008, 2011 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 COMPUTER, INC. ``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 COMPUTER, INC. OR
* 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.
*/
#include "third_party/blink/renderer/platform/fonts/unicode_range_set.h"
#include <unicode/utf16.h>
#include "third_party/blink/renderer/platform/wtf/text/wtf_string.h"
namespace blink {
UnicodeRangeSet::UnicodeRangeSet(HeapVector<UnicodeRange>&& ranges)
: ranges_(std::move(ranges)) {
if (ranges_.empty())
return;
std::sort(ranges_.begin(), ranges_.end());
// Unify overlapping ranges.
UChar32 from = ranges_[0].From();
UChar32 to = ranges_[0].To();
wtf_size_t target_index = 0;
for (wtf_size_t i = 1; i < ranges_.size(); i++) {
if (to + 1 >= ranges_[i].From()) {
to = std::max(to, ranges_[i].To());
} else {
ranges_[target_index++] = UnicodeRange(from, to);
from = ranges_[i].From();
to = ranges_[i].To();
}
}
ranges_[target_index++] = UnicodeRange(from, to);
ranges_.Shrink(target_index);
}
bool UnicodeRangeSet::Contains(UChar32 c) const {
if (IsEntireRange())
return true;
HeapVector<UnicodeRange>::const_iterator it =
std::lower_bound(ranges_.begin(), ranges_.end(), c);
return it != ranges_.end() && it->Contains(c);
}
bool UnicodeRangeSet::IntersectsWith(const String& text) const {
if (text.empty())
return false;
if (IsEntireRange())
return true;
if (text.Is8Bit() && ranges_[0].From() >= 0x100)
return false;
unsigned index = 0;
while (index < text.length()) {
UChar32 c = text.CharacterStartingAt(index);
index += U16_LENGTH(c);
if (Contains(c))
return true;
}
return false;
}
bool UnicodeRangeSet::operator==(const UnicodeRangeSet& other) const {
if (ranges_.size() == 0 && other.size() == 0)
return true;
if (ranges_.size() != other.size()) {
return false;
}
bool equal = true;
for (wtf_size_t i = 0; i < ranges_.size(); ++i) {
equal = equal && ranges_[i] == other.ranges_[i];
}
return equal;
}
}
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