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// Copyright 2014 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_cssstylesheet.h"
#include <utility>
#include "third_party/base/ptr_util.h"
#include "third_party/base/stl_util.h"
#include "xfa/fde/css/cfde_cssdeclaration.h"
#include "xfa/fde/css/cfde_cssstylerule.h"
#include "xfa/fde/css/fde_cssdatatable.h"
#include "xfa/fgas/crt/fgas_codepage.h"
CFDE_CSSStyleSheet::CFDE_CSSStyleSheet() : m_wRefCount(1) {}
CFDE_CSSStyleSheet::~CFDE_CSSStyleSheet() {
Reset();
}
void CFDE_CSSStyleSheet::Reset() {
m_RuleArray.clear();
m_StringCache.clear();
}
uint32_t CFDE_CSSStyleSheet::Retain() {
return ++m_wRefCount;
}
uint32_t CFDE_CSSStyleSheet::Release() {
uint32_t dwRefCount = --m_wRefCount;
if (dwRefCount == 0)
delete this;
return dwRefCount;
}
int32_t CFDE_CSSStyleSheet::CountRules() const {
return pdfium::CollectionSize<int32_t>(m_RuleArray);
}
CFDE_CSSStyleRule* CFDE_CSSStyleSheet::GetRule(int32_t index) {
return m_RuleArray[index].get();
}
bool CFDE_CSSStyleSheet::LoadBuffer(const FX_WCHAR* pBuffer, int32_t iBufSize) {
ASSERT(pBuffer && iBufSize > 0);
auto pSyntax = pdfium::MakeUnique<CFDE_CSSSyntaxParser>();
if (!pSyntax->Init(pBuffer, iBufSize))
return false;
Reset();
FDE_CSSSyntaxStatus eStatus;
do {
switch (eStatus = pSyntax->DoSyntaxParse()) {
case FDE_CSSSyntaxStatus::StyleRule:
eStatus = LoadStyleRule(pSyntax.get(), &m_RuleArray);
break;
default:
break;
}
} while (eStatus >= FDE_CSSSyntaxStatus::None);
m_StringCache.clear();
return eStatus != FDE_CSSSyntaxStatus::Error;
}
FDE_CSSSyntaxStatus CFDE_CSSStyleSheet::LoadStyleRule(
CFDE_CSSSyntaxParser* pSyntax,
std::vector<std::unique_ptr<CFDE_CSSStyleRule>>* ruleArray) {
std::vector<std::unique_ptr<CFDE_CSSSelector>> selectors;
CFDE_CSSStyleRule* pStyleRule = nullptr;
const FX_WCHAR* pszValue = nullptr;
int32_t iValueLen = 0;
FDE_CSSPropertyArgs propertyArgs;
propertyArgs.pStringCache = &m_StringCache;
propertyArgs.pProperty = nullptr;
CFX_WideString wsName;
while (1) {
switch (pSyntax->DoSyntaxParse()) {
case FDE_CSSSyntaxStatus::Selector: {
pszValue = pSyntax->GetCurrentString(iValueLen);
auto pSelector = CFDE_CSSSelector::FromString(pszValue, iValueLen);
if (pSelector)
selectors.push_back(std::move(pSelector));
break;
}
case FDE_CSSSyntaxStatus::PropertyName:
pszValue = pSyntax->GetCurrentString(iValueLen);
propertyArgs.pProperty =
FDE_GetCSSPropertyByName(CFX_WideStringC(pszValue, iValueLen));
if (!propertyArgs.pProperty)
wsName = CFX_WideStringC(pszValue, iValueLen);
break;
case FDE_CSSSyntaxStatus::PropertyValue:
if (propertyArgs.pProperty) {
pszValue = pSyntax->GetCurrentString(iValueLen);
if (iValueLen > 0) {
pStyleRule->GetDeclaration()->AddProperty(&propertyArgs, pszValue,
iValueLen);
}
} else if (iValueLen > 0) {
pszValue = pSyntax->GetCurrentString(iValueLen);
if (iValueLen > 0) {
pStyleRule->GetDeclaration()->AddProperty(
&propertyArgs, wsName.c_str(), wsName.GetLength(), pszValue,
iValueLen);
}
}
break;
case FDE_CSSSyntaxStatus::DeclOpen:
if (!pStyleRule && !selectors.empty()) {
auto rule = pdfium::MakeUnique<CFDE_CSSStyleRule>();
pStyleRule = rule.get();
pStyleRule->SetSelector(&selectors);
ruleArray->push_back(std::move(rule));
} else {
SkipRuleSet(pSyntax);
return FDE_CSSSyntaxStatus::None;
}
break;
case FDE_CSSSyntaxStatus::DeclClose:
if (pStyleRule && pStyleRule->GetDeclaration()->empty()) {
ruleArray->pop_back();
pStyleRule = nullptr;
}
return FDE_CSSSyntaxStatus::None;
case FDE_CSSSyntaxStatus::EOS:
return FDE_CSSSyntaxStatus::EOS;
case FDE_CSSSyntaxStatus::Error:
default:
return FDE_CSSSyntaxStatus::Error;
}
}
}
void CFDE_CSSStyleSheet::SkipRuleSet(CFDE_CSSSyntaxParser* pSyntax) {
while (1) {
switch (pSyntax->DoSyntaxParse()) {
case FDE_CSSSyntaxStatus::Selector:
case FDE_CSSSyntaxStatus::DeclOpen:
case FDE_CSSSyntaxStatus::PropertyName:
case FDE_CSSSyntaxStatus::PropertyValue:
break;
case FDE_CSSSyntaxStatus::DeclClose:
case FDE_CSSSyntaxStatus::EOS:
case FDE_CSSSyntaxStatus::Error:
default:
return;
}
}
}
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