| // Copyright 2017 The PDFium Authors |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| // Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com |
| |
| #ifndef CORE_FXCRT_CSS_CFX_CSSVALUELISTPARSER_H_ |
| #define CORE_FXCRT_CSS_CFX_CSSVALUELISTPARSER_H_ |
| |
| #include <stdint.h> |
| |
| #include <optional> |
| |
| #include "core/fxcrt/css/cfx_cssvalue.h" |
| #include "core/fxcrt/widestring.h" |
| |
| class CFX_CSSValueListParser { |
| public: |
| struct Result { |
| CFX_CSSValue::PrimitiveType type = CFX_CSSValue::PrimitiveType::kUnknown; |
| WideStringView string_view; |
| }; |
| |
| CFX_CSSValueListParser(WideStringView list, wchar_t separator); |
| ~CFX_CSSValueListParser(); |
| |
| std::optional<Result> NextValue(); |
| void UseCommaSeparator() { m_Separator = ','; } |
| |
| private: |
| bool CharsRemain() const { return !m_Cur.IsEmpty(); } |
| |
| // Safe to call even when input exhausted, stays unchanged. |
| void Advance() { m_Cur = m_Cur.Substr(1); } |
| |
| // Safe to call even when input exhausted, returns NUL. |
| wchar_t CurrentChar() const { return static_cast<wchar_t>(m_Cur.Front()); } |
| |
| size_t SkipToChar(wchar_t wch); |
| size_t SkipToCharMatchingParens(wchar_t wch); |
| |
| WideStringView m_Cur; |
| wchar_t m_Separator; |
| }; |
| |
| #endif // CORE_FXCRT_CSS_CFX_CSSVALUELISTPARSER_H_ |