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/*
* Copyright (C) 2010 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.
*/
#ifndef HTMLParserIdioms_h
#define HTMLParserIdioms_h
#include "core/CoreExport.h"
#include "core/dom/QualifiedName.h"
#include "platform/Decimal.h"
#include "wtf/Forward.h"
#include "wtf/text/WTFString.h"
namespace WTF {
class TextEncoding;
}
namespace blink {
// Strip leading and trailing whitespace as defined by the HTML specification.
String stripLeadingAndTrailingHTMLSpaces(const String&);
// An implementation of the HTML specification's algorithm to convert a number to a string for number and range types.
String serializeForNumberType(const Decimal&);
String serializeForNumberType(double);
// Convert the specified string to a decimal/double. If the conversion fails, the return value is fallback value or NaN if not specified.
// Leading or trailing illegal characters cause failure, as does passing an empty string.
// The double* parameter may be 0 to check if the string can be parsed without getting the result.
Decimal parseToDecimalForNumberType(const String&, const Decimal& fallbackValue = Decimal::nan());
double parseToDoubleForNumberType(const String&, double fallbackValue = std::numeric_limits<double>::quiet_NaN());
// http://www.whatwg.org/specs/web-apps/current-work/#rules-for-parsing-integers
bool parseHTMLInteger(const String&, int&);
// http://www.whatwg.org/specs/web-apps/current-work/#rules-for-parsing-non-negative-integers
CORE_EXPORT bool parseHTMLNonNegativeInteger(const String&, unsigned&);
// https://html.spec.whatwg.org/multipage/infrastructure.html#rules-for-parsing-a-list-of-floating-point-numbers
CORE_EXPORT Vector<double> parseHTMLListOfFloatingPointNumbers(const String&);
typedef Vector<std::pair<String, String>> HTMLAttributeList;
// The returned encoding might not be valid.
WTF::TextEncoding encodingFromMetaAttributes(const HTMLAttributeList&);
// Space characters as defined by the HTML specification.
template<typename CharType>
inline bool isHTMLSpace(CharType character)
{
// Histogram from Apple's page load test combined with some ad hoc browsing some other test suites.
//
// 82%: 216330 non-space characters, all > U+0020
// 11%: 30017 plain space characters, U+0020
// 5%: 12099 newline characters, U+000A
// 2%: 5346 tab characters, U+0009
//
// No other characters seen. No U+000C or U+000D, and no other control characters.
// Accordingly, we check for non-spaces first, then space, then newline, then tab, then the other characters.
return character <= ' ' && (character == ' ' || character == '\n' || character == '\t' || character == '\r' || character == '\f');
}
template<typename CharType>
inline bool isComma(CharType character)
{
return character == ',';
}
template<typename CharType>
inline bool isHTMLSpaceOrComma(CharType character)
{
return isComma(character) || isHTMLSpace(character);
}
inline bool isHTMLLineBreak(UChar character)
{
return character <= '\r' && (character == '\n' || character == '\r');
}
template<typename CharType>
inline bool isNotHTMLSpace(CharType character)
{
return !isHTMLSpace<CharType>(character);
}
bool threadSafeMatch(const QualifiedName&, const QualifiedName&);
bool threadSafeMatch(const String&, const QualifiedName&);
enum CharacterWidth {
Likely8Bit,
Force8Bit,
Force16Bit
};
String attemptStaticStringCreation(const LChar*, size_t);
String attemptStaticStringCreation(const UChar*, size_t, CharacterWidth);
template<size_t inlineCapacity>
inline static String attemptStaticStringCreation(const Vector<UChar, inlineCapacity>& vector, CharacterWidth width)
{
return attemptStaticStringCreation(vector.data(), vector.size(), width);
}
inline static String attemptStaticStringCreation(const String str)
{
if (!str.is8Bit())
return attemptStaticStringCreation(str.characters16(), str.length(), Force16Bit);
return attemptStaticStringCreation(str.characters8(), str.length());
}
} // namespace blink
#endif