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/*
* Copyright (C) 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 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.
*/
#include "third_party/blink/renderer/platform/text/text_run.h"
#include "third_party/blink/renderer/platform/text/character.h"
#include "third_party/blink/renderer/platform/wtf/text/string_buffer.h"
namespace blink {
String TextRun::NormalizedUTF16() const {
const UChar* source;
String string_for8_bit_run;
if (Is8Bit()) {
string_for8_bit_run = String::Make16BitFrom8BitSource(Span8());
source = string_for8_bit_run.Span16().data();
} else {
source = Span16().data();
}
wtf_size_t len = length();
StringBuffer<UChar> buffer(len);
unsigned result_length = 0;
bool error = false;
unsigned position = 0;
while (position < len) {
UChar32 character;
UNSAFE_TODO(U16_NEXT(source, position, len, character));
// Don't normalize tabs as they are not treated as spaces for word-end.
if (NormalizeSpace() &&
Character::IsNormalizedCanvasSpaceCharacter(character)) {
character = kSpaceCharacter;
} else if (Character::TreatAsSpace(character) &&
character != kNoBreakSpaceCharacter) {
character = kSpaceCharacter;
} else if (Character::TreatAsZeroWidthSpaceInComplexScriptLegacy(
character)) {
// Repalce only ZWS-like characters in BMP because we'd like to avoid
// changing the string length.
DCHECK_LT(character, 0x10000);
character = kZeroWidthSpaceCharacter;
}
UNSAFE_TODO(
U16_APPEND(buffer.Characters(), result_length, len, character, error));
DCHECK(!error);
}
DCHECK(result_length <= len);
return String::Adopt(buffer);
}
unsigned TextRun::IndexOfSubRun(const TextRun& sub_run) const {
if (Is8Bit() == sub_run.Is8Bit() && sub_run.text_.Bytes() >= text_.Bytes()) {
size_t start_index = Is8Bit() ? sub_run.Span8().data() - Span8().data()
: sub_run.Span16().data() - Span16().data();
if (start_index + sub_run.length() <= length())
return static_cast<unsigned>(start_index);
}
return std::numeric_limits<unsigned>::max();
}
} // namespace blink
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