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// Copyright 2017 PDFium Authors. All rights reserved.
// 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
#include "xfa/fde/css/cfde_cssvaluelistparser.h"
CFDE_CSSValueListParser::CFDE_CSSValueListParser(const FX_WCHAR* psz,
int32_t iLen,
FX_WCHAR separator)
: m_Separator(separator), m_pCur(psz), m_pEnd(psz + iLen) {
ASSERT(psz && iLen > 0);
}
bool CFDE_CSSValueListParser::NextValue(FDE_CSSPrimitiveType& eType,
const FX_WCHAR*& pStart,
int32_t& iLength) {
while (m_pCur < m_pEnd && (*m_pCur <= ' ' || *m_pCur == m_Separator)) {
++m_pCur;
}
if (m_pCur >= m_pEnd) {
return false;
}
eType = FDE_CSSPrimitiveType::Unknown;
pStart = m_pCur;
iLength = 0;
FX_WCHAR wch = *m_pCur;
if (wch == '#') {
iLength = SkipTo(' ');
if (iLength == 4 || iLength == 7) {
eType = FDE_CSSPrimitiveType::RGB;
}
} else if ((wch >= '0' && wch <= '9') || wch == '.' || wch == '-' ||
wch == '+') {
while (m_pCur < m_pEnd && (*m_pCur > ' ' && *m_pCur != m_Separator)) {
++m_pCur;
}
iLength = m_pCur - pStart;
if (iLength > 0) {
eType = FDE_CSSPrimitiveType::Number;
}
} else if (wch == '\"' || wch == '\'') {
pStart++;
iLength = SkipTo(wch) - 1;
m_pCur++;
eType = FDE_CSSPrimitiveType::String;
} else if (m_pEnd - m_pCur > 5 && m_pCur[3] == '(') {
if (FXSYS_wcsnicmp(L"url", m_pCur, 3) == 0) {
wch = m_pCur[4];
if (wch == '\"' || wch == '\'') {
pStart += 5;
iLength = SkipTo(wch) - 6;
m_pCur += 2;
} else {
pStart += 4;
iLength = SkipTo(')') - 4;
m_pCur++;
}
eType = FDE_CSSPrimitiveType::String;
} else if (FXSYS_wcsnicmp(L"rgb", m_pCur, 3) == 0) {
iLength = SkipTo(')') + 1;
m_pCur++;
eType = FDE_CSSPrimitiveType::RGB;
}
} else {
iLength = SkipTo(m_Separator, true, true);
eType = FDE_CSSPrimitiveType::String;
}
return m_pCur <= m_pEnd && iLength > 0;
}
int32_t CFDE_CSSValueListParser::SkipTo(FX_WCHAR wch,
bool bWSSeparator,
bool bBrContinue) {
const FX_WCHAR* pStart = m_pCur;
if (!bBrContinue) {
if (bWSSeparator) {
while ((++m_pCur < m_pEnd) && (*m_pCur != wch) && (*m_pCur > ' ')) {
continue;
}
} else {
while (++m_pCur < m_pEnd && *m_pCur != wch) {
continue;
}
}
} else {
int32_t iBracketCount = 0;
if (bWSSeparator) {
while ((m_pCur < m_pEnd) && (*m_pCur != wch) && (*m_pCur > ' ')) {
if (*m_pCur == '(') {
iBracketCount++;
} else if (*m_pCur == ')') {
iBracketCount--;
}
m_pCur++;
}
} else {
while (m_pCur < m_pEnd && *m_pCur != wch) {
if (*m_pCur == '(') {
iBracketCount++;
} else if (*m_pCur == ')') {
iBracketCount--;
}
m_pCur++;
}
}
while (iBracketCount > 0 && m_pCur < m_pEnd) {
if (*m_pCur == ')') {
iBracketCount--;
}
m_pCur++;
}
}
return m_pCur - pStart;
}
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