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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 <memory>
#include "xfa/fde/css/fde_csscache.h"
#include "xfa/fde/css/fde_cssdeclaration.h"
#include "xfa/fde/css/fde_cssstyleselector.h"
#include "xfa/fde/css/fde_cssstylesheet.h"
#include "xfa/fde/css/fde_csssyntax.h"
#include "xfa/fxfa/app/xfa_textlayout.h"
#define FDE_CSSUNIVERSALHASH ('*')
void CFDE_CSSRuleCollection::Clear() {
m_IDRules.RemoveAll();
m_TagRules.RemoveAll();
m_ClassRules.RemoveAll();
m_pUniversalRules = nullptr;
m_pStaticStore = nullptr;
m_iSelectors = 0;
}
CFDE_CSSRuleCollection::CFDE_CSSRuleCollection()
: m_pStaticStore(nullptr),
m_pUniversalRules(nullptr),
m_pPersudoRules(nullptr),
m_iSelectors(0) {}
CFDE_CSSRuleCollection::~CFDE_CSSRuleCollection() {
Clear();
}
void CFDE_CSSRuleCollection::AddRulesFrom(const CFDE_CSSStyleSheetArray& sheets,
uint32_t dwMediaList,
CFGAS_FontMgr* pFontMgr) {
int32_t iSheets = sheets.GetSize();
for (int32_t i = 0; i < iSheets; ++i) {
IFDE_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(IFDE_CSSStyleSheet* pStyleSheet,
IFDE_CSSRule* pRule,
uint32_t dwMediaList,
CFGAS_FontMgr* pFontMgr) {
switch (pRule->GetType()) {
case FDE_CSSRULETYPE_Style: {
IFDE_CSSStyleRule* pStyleRule = static_cast<IFDE_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_Persudo) {
FDE_CSSRuleData* pData = NewRuleData(pSelector, pDeclaration);
AddRuleTo(m_pPersudoRules, 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: {
IFDE_CSSMediaRule* pMediaRule = static_cast<IFDE_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(CFX_MapPtrToPtr& map,
uint32_t dwKey,
CFDE_CSSSelector* pSel,
CFDE_CSSDeclaration* pDecl) {
void* pKey = (void*)(uintptr_t)dwKey;
FDE_CSSRuleData* pData = NewRuleData(pSel, pDecl);
FDE_CSSRuleData* pList = nullptr;
if (!map.Lookup(pKey, (void*&)pList)) {
map.SetAt(pKey, pData);
} else if (AddRuleTo(pList, pData)) {
map.SetAt(pKey, 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 FXTARGET_NewWith(m_pStaticStore)
FDE_CSSRuleData(pSel, pDecl, ++m_iSelectors);
}
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