| /* |
| * Copyright (C) 2003 Lars Knoll (knoll@kde.org) |
| * Copyright (C) 2005 Allan Sandfeld Jensen (kde@carewolf.com) |
| * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012 Apple Inc. |
| * All rights reserved. |
| * Copyright (C) 2007 Nicholas Shanks <webkit@nickshanks.com> |
| * Copyright (C) 2008 Eric Seidel <eric@webkit.org> |
| * Copyright (C) 2009 Torch Mobile Inc. All rights reserved. |
| * (http://www.torchmobile.com/) |
| * Copyright (C) 2012 Adobe Systems Incorporated. All rights reserved. |
| * Copyright (C) 2012 Intel Corporation. All rights reserved. |
| * |
| * This library is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU Library General Public |
| * License as published by the Free Software Foundation; either |
| * version 2 of the License, or (at your option) any later version. |
| * |
| * This library is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| * Library General Public License for more details. |
| * |
| * You should have received a copy of the GNU Library General Public License |
| * along with this library; see the file COPYING.LIB. If not, write to |
| * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, |
| * Boston, MA 02110-1301, USA. |
| */ |
| |
| #include "core/css/CSSMarkup.h" |
| |
| #include "core/css/parser/CSSParserIdioms.h" |
| #include "platform/wtf/HexNumber.h" |
| #include "platform/wtf/text/StringBuffer.h" |
| #include "platform/wtf/text/StringBuilder.h" |
| |
| namespace blink { |
| |
| template <typename CharacterType> |
| static inline bool IsCSSTokenizerIdentifier(const CharacterType* characters, |
| unsigned length) { |
| const CharacterType* end = characters + length; |
| |
| // -? |
| if (characters != end && characters[0] == '-') |
| ++characters; |
| |
| // {nmstart} |
| if (characters == end || !IsNameStartCodePoint(characters[0])) |
| return false; |
| ++characters; |
| |
| // {nmchar}* |
| for (; characters != end; ++characters) { |
| if (!IsNameCodePoint(characters[0])) |
| return false; |
| } |
| |
| return true; |
| } |
| |
| // "ident" from the CSS tokenizer, minus backslash-escape sequences |
| static bool IsCSSTokenizerIdentifier(const String& string) { |
| unsigned length = string.length(); |
| |
| if (!length) |
| return false; |
| |
| if (string.Is8Bit()) |
| return IsCSSTokenizerIdentifier(string.Characters8(), length); |
| return IsCSSTokenizerIdentifier(string.Characters16(), length); |
| } |
| |
| static void SerializeCharacter(UChar32 c, StringBuilder& append_to) { |
| append_to.Append('\\'); |
| append_to.Append(c); |
| } |
| |
| static void SerializeCharacterAsCodePoint(UChar32 c, StringBuilder& append_to) { |
| append_to.Append('\\'); |
| HexNumber::AppendUnsignedAsHex(c, append_to, HexNumber::kLowercase); |
| append_to.Append(' '); |
| } |
| |
| void SerializeIdentifier(const String& identifier, |
| StringBuilder& append_to, |
| bool skip_start_checks) { |
| bool is_first = !skip_start_checks; |
| bool is_second = false; |
| bool is_first_char_hyphen = false; |
| unsigned index = 0; |
| while (index < identifier.length()) { |
| UChar32 c = identifier.CharacterStartingAt(index); |
| if (c == 0) { |
| // Check for lone surrogate which characterStartingAt does not return. |
| c = identifier[index]; |
| } |
| |
| index += U16_LENGTH(c); |
| |
| if (c == 0) |
| append_to.Append(0xfffd); |
| else if (c <= 0x1f || c == 0x7f || |
| (0x30 <= c && c <= 0x39 && |
| (is_first || (is_second && is_first_char_hyphen)))) |
| SerializeCharacterAsCodePoint(c, append_to); |
| else if (c == 0x2d && is_first && index == identifier.length()) |
| SerializeCharacter(c, append_to); |
| else if (0x80 <= c || c == 0x2d || c == 0x5f || (0x30 <= c && c <= 0x39) || |
| (0x41 <= c && c <= 0x5a) || (0x61 <= c && c <= 0x7a)) |
| append_to.Append(c); |
| else |
| SerializeCharacter(c, append_to); |
| |
| if (is_first) { |
| is_first = false; |
| is_second = true; |
| is_first_char_hyphen = (c == 0x2d); |
| } else if (is_second) { |
| is_second = false; |
| } |
| } |
| } |
| |
| void SerializeString(const String& string, StringBuilder& append_to) { |
| append_to.Append('\"'); |
| |
| unsigned index = 0; |
| while (index < string.length()) { |
| UChar32 c = string.CharacterStartingAt(index); |
| index += U16_LENGTH(c); |
| |
| if (c <= 0x1f || c == 0x7f) |
| SerializeCharacterAsCodePoint(c, append_to); |
| else if (c == 0x22 || c == 0x5c) |
| SerializeCharacter(c, append_to); |
| else |
| append_to.Append(c); |
| } |
| |
| append_to.Append('\"'); |
| } |
| |
| String SerializeString(const String& string) { |
| StringBuilder builder; |
| SerializeString(string, builder); |
| return builder.ToString(); |
| } |
| |
| String SerializeURI(const String& string) { |
| return "url(" + SerializeString(string) + ")"; |
| } |
| |
| String SerializeFontFamily(const String& string) { |
| return IsCSSTokenizerIdentifier(string) ? string : SerializeString(string); |
| } |
| |
| } // namespace blink |