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// Copyright 2016 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/fde_cssstyleselector.h"
#include <algorithm>
#include <map>
#include <memory>
#include "xfa/fde/css/fde_csscache.h"
#include "xfa/fde/css/fde_cssdeclaration.h"
#include "xfa/fde/css/fde_cssstylesheet.h"
#include "xfa/fde/css/fde_csssyntax.h"
#define FDE_CSSUNIVERSALHASH ('*')
void CFDE_CSSRuleCollection::Clear() {
m_IDRules.clear();
m_TagRules.clear();
m_ClassRules.clear();
m_pUniversalRules = nullptr;
m_iSelectors = 0;
}
CFDE_CSSRuleCollection::CFDE_CSSRuleCollection()
: m_pUniversalRules(nullptr), m_pPseudoRules(nullptr), m_iSelectors(0) {}
CFDE_CSSRuleCollection::~CFDE_CSSRuleCollection() {
Clear();
}
void CFDE_CSSRuleCollection::AddRulesFrom(
const CFX_ArrayTemplate<CFDE_CSSStyleSheet*>& sheets,
uint32_t dwMediaList,
CFGAS_FontMgr* pFontMgr) {
int32_t iSheets = sheets.GetSize();
for (int32_t i = 0; i < iSheets; ++i) {
CFDE_CSSStyleSheet* pSheet = sheets.GetAt(i);
if (uint32_t dwMatchMedia = pSheet->GetMediaList() & dwMediaList) {
int32_t iRules = pSheet->CountRules();
for (int32_t j = 0; j < iRules; j++) {
AddRulesFrom(pSheet, pSheet->GetRule(j), dwMatchMedia, pFontMgr);
}
}
}
}
void CFDE_CSSRuleCollection::AddRulesFrom(CFDE_CSSStyleSheet* pStyleSheet,
CFDE_CSSRule* pRule,
uint32_t dwMediaList,
CFGAS_FontMgr* pFontMgr) {
switch (pRule->GetType()) {
case FDE_CSSRuleType::Style: {
CFDE_CSSStyleRule* pStyleRule = static_cast<CFDE_CSSStyleRule*>(pRule);
CFDE_CSSDeclaration* pDeclaration = pStyleRule->GetDeclaration();
int32_t iSelectors = pStyleRule->CountSelectorLists();
for (int32_t i = 0; i < iSelectors; ++i) {
CFDE_CSSSelector* pSelector = pStyleRule->GetSelectorList(i);
if (pSelector->GetType() == FDE_CSSSelectorType::Pseudo) {
FDE_CSSRuleData* pData = NewRuleData(pSelector, pDeclaration);
AddRuleTo(&m_pPseudoRules, pData);
continue;
}
if (pSelector->GetNameHash() != FDE_CSSUNIVERSALHASH) {
AddRuleTo(&m_TagRules, pSelector->GetNameHash(), pSelector,
pDeclaration);
continue;
}
CFDE_CSSSelector* pNext = pSelector->GetNextSelector();
if (!pNext) {
FDE_CSSRuleData* pData = NewRuleData(pSelector, pDeclaration);
AddRuleTo(&m_pUniversalRules, pData);
continue;
}
switch (pNext->GetType()) {
case FDE_CSSSelectorType::ID:
AddRuleTo(&m_IDRules, pNext->GetNameHash(), pSelector,
pDeclaration);
break;
case FDE_CSSSelectorType::Class:
AddRuleTo(&m_ClassRules, pNext->GetNameHash(), pSelector,
pDeclaration);
break;
case FDE_CSSSelectorType::Descendant:
case FDE_CSSSelectorType::Element:
AddRuleTo(&m_pUniversalRules, NewRuleData(pSelector, pDeclaration));
break;
default:
ASSERT(false);
break;
}
}
} break;
case FDE_CSSRuleType::Media: {
CFDE_CSSMediaRule* pMediaRule = static_cast<CFDE_CSSMediaRule*>(pRule);
if (pMediaRule->GetMediaList() & dwMediaList) {
int32_t iRules = pMediaRule->CountRules();
for (int32_t i = 0; i < iRules; ++i) {
AddRulesFrom(pStyleSheet, pMediaRule->GetRule(i), dwMediaList,
pFontMgr);
}
}
} break;
default:
break;
}
}
void CFDE_CSSRuleCollection::AddRuleTo(
std::map<uint32_t, FDE_CSSRuleData*>* pMap,
uint32_t dwKey,
CFDE_CSSSelector* pSel,
CFDE_CSSDeclaration* pDecl) {
FDE_CSSRuleData* pData = NewRuleData(pSel, pDecl);
FDE_CSSRuleData* pList = (*pMap)[dwKey];
if (!pList) {
(*pMap)[dwKey] = pData;
} else if (AddRuleTo(&pList, pData)) {
(*pMap)[dwKey] = pList;
}
}
bool CFDE_CSSRuleCollection::AddRuleTo(FDE_CSSRuleData** pList,
FDE_CSSRuleData* pData) {
if (*pList) {
pData->pNext = (*pList)->pNext;
(*pList)->pNext = pData;
return false;
}
*pList = pData;
return true;
}
FDE_CSSRuleData* CFDE_CSSRuleCollection::NewRuleData(
CFDE_CSSSelector* pSel,
CFDE_CSSDeclaration* pDecl) {
return new FDE_CSSRuleData(pSel, pDecl, ++m_iSelectors);
}
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