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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 "core/fxcrt/css/cfx_cssstylesheet.h"
#include <utility>
#include "core/fxcrt/css/cfx_cssdeclaration.h"
#include "core/fxcrt/css/cfx_csspropertytable.h"
#include "core/fxcrt/css/cfx_cssstylerule.h"
#include "core/fxcrt/fx_codepage.h"
#include "third_party/base/ptr_util.h"
#include "third_party/base/stl_util.h"
CFX_CSSStyleSheet::CFX_CSSStyleSheet() {}
CFX_CSSStyleSheet::~CFX_CSSStyleSheet() {
Reset();
}
void CFX_CSSStyleSheet::Reset() {
m_RuleArray.clear();
m_StringCache.clear();
}
int32_t CFX_CSSStyleSheet::CountRules() const {
return pdfium::CollectionSize<int32_t>(m_RuleArray);
}
CFX_CSSStyleRule* CFX_CSSStyleSheet::GetRule(int32_t index) const {
return m_RuleArray[index].get();
}
bool CFX_CSSStyleSheet::LoadBuffer(const wchar_t* pBuffer, int32_t iBufSize) {
ASSERT(pBuffer);
ASSERT(iBufSize > 0);
auto pSyntax = pdfium::MakeUnique<CFX_CSSSyntaxParser>(pBuffer, iBufSize);
Reset();
CFX_CSSSyntaxStatus eStatus;
do {
switch (eStatus = pSyntax->DoSyntaxParse()) {
case CFX_CSSSyntaxStatus::StyleRule:
eStatus = LoadStyleRule(pSyntax.get(), &m_RuleArray);
break;
default:
break;
}
} while (eStatus >= CFX_CSSSyntaxStatus::None);
m_StringCache.clear();
return eStatus != CFX_CSSSyntaxStatus::Error;
}
CFX_CSSSyntaxStatus CFX_CSSStyleSheet::LoadStyleRule(
CFX_CSSSyntaxParser* pSyntax,
std::vector<std::unique_ptr<CFX_CSSStyleRule>>* ruleArray) {
std::vector<std::unique_ptr<CFX_CSSSelector>> selectors;
CFX_CSSStyleRule* pStyleRule = nullptr;
int32_t iValueLen = 0;
const CFX_CSSPropertyTable::Entry* entry = nullptr;
WideString wsName;
while (1) {
switch (pSyntax->DoSyntaxParse()) {
case CFX_CSSSyntaxStatus::Selector: {
WideStringView strValue = pSyntax->GetCurrentString();
auto pSelector = CFX_CSSSelector::FromString(strValue);
if (pSelector)
selectors.push_back(std::move(pSelector));
break;
}
case CFX_CSSSyntaxStatus::PropertyName: {
WideStringView strValue = pSyntax->GetCurrentString();
entry = CFX_CSSPropertyTable::GetByName(strValue);
if (!entry)
wsName = WideString(strValue);
break;
}
case CFX_CSSSyntaxStatus::PropertyValue: {
if (entry || iValueLen > 0) {
WideStringView strValue = pSyntax->GetCurrentString();
auto* decl = pStyleRule->GetDeclaration();
if (!strValue.IsEmpty()) {
if (entry) {
decl->AddProperty(entry, strValue);
} else {
decl->AddProperty(wsName, WideString(strValue));
}
}
}
break;
}
case CFX_CSSSyntaxStatus::DeclOpen: {
if (!pStyleRule && !selectors.empty()) {
auto rule = pdfium::MakeUnique<CFX_CSSStyleRule>();
pStyleRule = rule.get();
pStyleRule->SetSelector(&selectors);
ruleArray->push_back(std::move(rule));
} else {
SkipRuleSet(pSyntax);
return CFX_CSSSyntaxStatus::None;
}
break;
}
case CFX_CSSSyntaxStatus::DeclClose: {
if (pStyleRule && pStyleRule->GetDeclaration()->empty()) {
ruleArray->pop_back();
pStyleRule = nullptr;
}
return CFX_CSSSyntaxStatus::None;
}
case CFX_CSSSyntaxStatus::EOS:
return CFX_CSSSyntaxStatus::EOS;
case CFX_CSSSyntaxStatus::Error:
default:
return CFX_CSSSyntaxStatus::Error;
}
}
}
void CFX_CSSStyleSheet::SkipRuleSet(CFX_CSSSyntaxParser* pSyntax) {
while (1) {
switch (pSyntax->DoSyntaxParse()) {
case CFX_CSSSyntaxStatus::Selector:
case CFX_CSSSyntaxStatus::DeclOpen:
case CFX_CSSSyntaxStatus::PropertyName:
case CFX_CSSSyntaxStatus::PropertyValue:
break;
case CFX_CSSSyntaxStatus::DeclClose:
case CFX_CSSSyntaxStatus::EOS:
case CFX_CSSSyntaxStatus::Error:
default:
return;
}
}
}
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