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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 "platform/text/TextRun.h"
#include "platform/RuntimeEnabledFeatures.h"
#include "platform/text/Character.h"
namespace blink {
struct ExpectedTextRunSize {
DISALLOW_NEW();
const void* pointer;
int integers[2];
float float1;
float float2;
float float3;
uint32_t bitfields : 10;
TabSize tabSize;
};
static_assert(sizeof(TextRun) == sizeof(ExpectedTextRunSize),
"TextRun should have expected size");
void TextRun::setText(const String& string) {
m_len = string.length();
if (!m_len) {
m_data.characters8 = 0;
m_is8Bit = true;
return;
}
m_is8Bit = string.is8Bit();
if (m_is8Bit)
m_data.characters8 = string.characters8();
else
m_data.characters16 = string.characters16();
}
std::unique_ptr<UChar[]> TextRun::normalizedUTF16(
unsigned* resultLength) const {
const UChar* source;
String stringFor8BitRun;
if (is8Bit()) {
stringFor8BitRun = String::make16BitFrom8BitSource(characters8(), length());
source = stringFor8BitRun.characters16();
} else {
source = characters16();
}
UChar* buffer = new UChar[m_len + 1];
*resultLength = 0;
bool error = false;
unsigned position = 0;
while (position < m_len) {
UChar32 character;
U16_NEXT(source, position, m_len, character);
// Don't normalize tabs as they are not treated as spaces for word-end.
if (normalizeSpace() &&
Character::isNormalizedCanvasSpaceCharacter(character)) {
character = spaceCharacter;
} else if (Character::treatAsSpace(character) &&
character != noBreakSpaceCharacter) {
character = spaceCharacter;
} else if (!RuntimeEnabledFeatures::
renderUnicodeControlCharactersEnabled() &&
Character::legacyTreatAsZeroWidthSpaceInComplexScript(
character)) {
character = zeroWidthSpaceCharacter;
} else if (Character::treatAsZeroWidthSpaceInComplexScript(character)) {
character = zeroWidthSpaceCharacter;
}
U16_APPEND(buffer, *resultLength, m_len, character, error);
DCHECK(!error);
}
DCHECK(*resultLength <= m_len);
return wrapArrayUnique(buffer);
}
} // namespace blink
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