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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 THIRD_PARTY_BLINK_RENDERER_CORE_HTML_PARSER_HTML_PARSER_IDIOMS_H_
#define THIRD_PARTY_BLINK_RENDERER_CORE_HTML_PARSER_HTML_PARSER_IDIOMS_H_
#include "third_party/blink/renderer/core/core_export.h"
#include "third_party/blink/renderer/core/dom/qualified_name.h"
#include "third_party/blink/renderer/platform/decimal.h"
#include "third_party/blink/renderer/platform/wtf/forward.h"
#include "third_party/blink/renderer/platform/wtf/text/wtf_string.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& fallback_value = Decimal::Nan());
CORE_EXPORT double ParseToDoubleForNumberType(
const String&,
double fallback_value = std::numeric_limits<double>::quiet_NaN());
// http://www.whatwg.org/specs/web-apps/current-work/#rules-for-parsing-integers
CORE_EXPORT 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/common-dom-interfaces.html#clamped-to-the-range
// without default value processing.
bool ParseHTMLClampedNonNegativeInteger(const String&,
unsigned min,
unsigned max,
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 { kLikely8Bit, kForce8Bit, kForce16Bit };
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(),
kForce16Bit);
return AttemptStaticStringCreation(str.Characters8(), str.length());
}
} // namespace blink
#endif // THIRD_PARTY_BLINK_RENDERER_CORE_HTML_PARSER_HTML_PARSER_IDIOMS_H_
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