| // 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/fde_cssstylesheet.h" |
| |
| #include "xfa/fde/css/fde_cssdatatable.h" |
| #include "xfa/fde/css/fde_csssyntax.h" |
| #include "xfa/fgas/crt/fgas_codepage.h" |
| |
| IFDE_CSSStyleSheet* IFDE_CSSStyleSheet::LoadHTMLStandardStyleSheet() { |
| static const FX_WCHAR s_pStyle[] = |
| L"html,address,blockquote,body,dd,div,dl,dt,fieldset,form,frame,frameset," |
| L"h1,h2,h3,h4,h5,h6,noframes,ol,p,ul,center,dir,hr,menu,pre{display:" |
| L"block}" |
| L"li{display:list-item}head{display:none}table{display:table}tr{display:" |
| L"table-row}thead{display:table-header-group}tbody{display:table-row-" |
| L"group}tfoot{display:table-footer-group}" |
| L"col{display:table-column}colgroup{display:table-column-group}td,th{" |
| L"display:table-cell}caption{display:table-caption}th{font-weight:bolder;" |
| L"text-align:center}caption{text-align:center}" |
| L"body{margin:0}h1{font-size:2em;margin:.67em " |
| L"0}h2{font-size:1.5em;margin:.75em 0}h3{font-size:1.17em;margin:.83em " |
| L"0}h4,p,blockquote,ul,fieldset,form,ol,dl,dir,menu{margin:1.12em 0}" |
| L"h5{font-size:.83em;margin:1.5em 0}h6{font-size:.75em;margin:1.67em " |
| L"0}h1,h2,h3,h4,h5,h6,b,strong{font-weight:bolder}blockquote{margin-left:" |
| L"40px;margin-right:40px}i,cite,em,var,address{font-style:italic}" |
| L"pre,tt,code,kbd,samp{font-family:monospace}pre{white-space:pre}button," |
| L"textarea,input,select{display:inline-block}big{font-size:1.17em}small," |
| L"sub,sup{font-size:.83em}sub{vertical-align:sub}" |
| L"sup{vertical-align:super}table{border-spacing:2px}thead,tbody,tfoot{" |
| L"vertical-align:middle}td,th,tr{vertical-align:inherit}s,strike,del{" |
| L"text-decoration:line-through}hr{border:1px inset silver}" |
| L"ol,ul,dir,menu,dd{margin-left:40px}ol{list-style-type:decimal}ol ul,ul " |
| L"ol,ul ul,ol " |
| L"ol{margin-top:0;margin-bottom:0}u,ins{text-decoration:underline}center{" |
| L"text-align:center}" |
| L"ruby{display:ruby}rt{display:ruby-text;font-size:.5em}rb{display:ruby-" |
| L"base}rbc{display:ruby-base-group}rtc{display:ruby-text-group}" |
| L"q:before{content:open-quote}q:after{content:close-quote}" |
| L"rp{display:none}"; |
| return IFDE_CSSStyleSheet::LoadFromBuffer( |
| CFX_WideString(), s_pStyle, FXSYS_wcslen(s_pStyle), FX_CODEPAGE_UTF8); |
| } |
| |
| IFDE_CSSStyleSheet* IFDE_CSSStyleSheet::LoadFromStream( |
| const CFX_WideString& szUrl, |
| IFX_Stream* pStream, |
| uint16_t wCodePage, |
| uint32_t dwMediaList) { |
| CFDE_CSSStyleSheet* pStyleSheet = new CFDE_CSSStyleSheet(dwMediaList); |
| if (!pStyleSheet->LoadFromStream(szUrl, pStream, wCodePage)) { |
| pStyleSheet->Release(); |
| pStyleSheet = NULL; |
| } |
| return pStyleSheet; |
| } |
| IFDE_CSSStyleSheet* IFDE_CSSStyleSheet::LoadFromBuffer( |
| const CFX_WideString& szUrl, |
| const FX_WCHAR* pBuffer, |
| int32_t iBufSize, |
| uint16_t wCodePage, |
| uint32_t dwMediaList) { |
| CFDE_CSSStyleSheet* pStyleSheet = new CFDE_CSSStyleSheet(dwMediaList); |
| if (!pStyleSheet->LoadFromBuffer(szUrl, pBuffer, iBufSize, wCodePage)) { |
| pStyleSheet->Release(); |
| pStyleSheet = NULL; |
| } |
| return pStyleSheet; |
| } |
| CFDE_CSSStyleSheet::CFDE_CSSStyleSheet(uint32_t dwMediaList) |
| : m_wCodePage(FX_CODEPAGE_UTF8), |
| m_wRefCount(1), |
| m_dwMediaList(dwMediaList), |
| m_pAllocator(NULL) { |
| ASSERT(m_dwMediaList > 0); |
| } |
| CFDE_CSSStyleSheet::~CFDE_CSSStyleSheet() { |
| Reset(); |
| } |
| void CFDE_CSSStyleSheet::Reset() { |
| for (int32_t i = m_RuleArray.GetSize() - 1; i >= 0; --i) { |
| IFDE_CSSRule* pRule = m_RuleArray.GetAt(i); |
| switch (pRule->GetType()) { |
| case FDE_CSSRULETYPE_Style: |
| ((CFDE_CSSStyleRule*)pRule)->~CFDE_CSSStyleRule(); |
| break; |
| case FDE_CSSRULETYPE_Media: |
| ((CFDE_CSSMediaRule*)pRule)->~CFDE_CSSMediaRule(); |
| break; |
| case FDE_CSSRULETYPE_FontFace: |
| ((CFDE_CSSFontFaceRule*)pRule)->~CFDE_CSSFontFaceRule(); |
| break; |
| default: |
| ASSERT(FALSE); |
| break; |
| } |
| } |
| m_RuleArray.RemoveAll(); |
| m_Selectors.RemoveAll(); |
| m_StringCache.RemoveAll(); |
| if (m_pAllocator) { |
| m_pAllocator->Release(); |
| m_pAllocator = NULL; |
| } |
| } |
| uint32_t CFDE_CSSStyleSheet::AddRef() { |
| 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 m_RuleArray.GetSize(); |
| } |
| IFDE_CSSRule* CFDE_CSSStyleSheet::GetRule(int32_t index) { |
| return m_RuleArray.GetAt(index); |
| } |
| FX_BOOL CFDE_CSSStyleSheet::LoadFromStream(const CFX_WideString& szUrl, |
| IFX_Stream* pStream, |
| uint16_t wCodePage) { |
| CFDE_CSSSyntaxParser* pSyntax = new CFDE_CSSSyntaxParser; |
| if (pStream->GetCodePage() != wCodePage) { |
| pStream->SetCodePage(wCodePage); |
| } |
| FX_BOOL bRet = pSyntax->Init(pStream, 4096) && LoadFromSyntax(pSyntax); |
| pSyntax->Release(); |
| m_wCodePage = wCodePage; |
| m_szUrl = szUrl; |
| return bRet; |
| } |
| FX_BOOL CFDE_CSSStyleSheet::LoadFromBuffer(const CFX_WideString& szUrl, |
| const FX_WCHAR* pBuffer, |
| int32_t iBufSize, |
| uint16_t wCodePage) { |
| ASSERT(pBuffer && iBufSize > 0); |
| |
| CFDE_CSSSyntaxParser* pSyntax = new CFDE_CSSSyntaxParser; |
| FX_BOOL bRet = pSyntax->Init(pBuffer, iBufSize) && LoadFromSyntax(pSyntax); |
| pSyntax->Release(); |
| m_wCodePage = wCodePage; |
| m_szUrl = szUrl; |
| return bRet; |
| } |
| FX_BOOL CFDE_CSSStyleSheet::LoadFromSyntax(CFDE_CSSSyntaxParser* pSyntax) { |
| Reset(); |
| m_pAllocator = IFX_MemoryAllocator::Create(FX_ALLOCTYPE_Static, 1024, 0); |
| FDE_CSSSYNTAXSTATUS eStatus; |
| do { |
| switch (eStatus = pSyntax->DoSyntaxParse()) { |
| case FDE_CSSSYNTAXSTATUS_StyleRule: |
| eStatus = LoadStyleRule(pSyntax, m_RuleArray); |
| break; |
| case FDE_CSSSYNTAXSTATUS_MediaRule: |
| eStatus = LoadMediaRule(pSyntax); |
| break; |
| case FDE_CSSSYNTAXSTATUS_FontFaceRule: |
| eStatus = LoadFontFaceRule(pSyntax, m_RuleArray); |
| break; |
| case FDE_CSSSYNTAXSTATUS_ImportRule: |
| eStatus = LoadImportRule(pSyntax); |
| break; |
| case FDE_CSSSYNTAXSTATUS_PageRule: |
| eStatus = LoadPageRule(pSyntax); |
| break; |
| default: |
| break; |
| } |
| } while (eStatus >= FDE_CSSSYNTAXSTATUS_None); |
| m_Selectors.RemoveAll(); |
| m_StringCache.RemoveAll(); |
| return eStatus != FDE_CSSSYNTAXSTATUS_Error; |
| } |
| FDE_CSSSYNTAXSTATUS CFDE_CSSStyleSheet::LoadMediaRule( |
| CFDE_CSSSyntaxParser* pSyntax) { |
| uint32_t dwMediaList = 0; |
| CFDE_CSSMediaRule* pMediaRule = NULL; |
| for (;;) { |
| switch (pSyntax->DoSyntaxParse()) { |
| case FDE_CSSSYNTAXSTATUS_MediaType: { |
| int32_t iLen; |
| const FX_WCHAR* psz = pSyntax->GetCurrentString(iLen); |
| FDE_LPCCSSMEDIATYPETABLE pMediaType = |
| FDE_GetCSSMediaTypeByName(CFX_WideStringC(psz, iLen)); |
| if (pMediaType != NULL) { |
| dwMediaList |= pMediaType->wValue; |
| } |
| } break; |
| case FDE_CSSSYNTAXSTATUS_StyleRule: |
| if (pMediaRule == NULL) { |
| SkipRuleSet(pSyntax); |
| } else { |
| FDE_CSSSYNTAXSTATUS eStatus = |
| LoadStyleRule(pSyntax, pMediaRule->GetArray()); |
| if (eStatus < FDE_CSSSYNTAXSTATUS_None) { |
| return eStatus; |
| } |
| } |
| break; |
| case FDE_CSSSYNTAXSTATUS_DeclOpen: |
| if ((dwMediaList & m_dwMediaList) > 0 && pMediaRule == NULL) { |
| pMediaRule = |
| FXTARGET_NewWith(m_pAllocator) CFDE_CSSMediaRule(dwMediaList); |
| m_RuleArray.Add(pMediaRule); |
| } |
| break; |
| case FDE_CSSSYNTAXSTATUS_DeclClose: |
| return FDE_CSSSYNTAXSTATUS_None; |
| FDE_CSSSWITCHDEFAULTS(); |
| } |
| } |
| } |
| FDE_CSSSYNTAXSTATUS CFDE_CSSStyleSheet::LoadStyleRule( |
| CFDE_CSSSyntaxParser* pSyntax, |
| CFDE_CSSRuleArray& ruleArray) { |
| m_Selectors.RemoveAt(0, m_Selectors.GetSize()); |
| CFDE_CSSStyleRule* pStyleRule = NULL; |
| const FX_WCHAR* pszValue = NULL; |
| int32_t iValueLen = 0; |
| FDE_CSSPROPERTYARGS propertyArgs; |
| propertyArgs.pStaticStore = m_pAllocator; |
| propertyArgs.pStringCache = &m_StringCache; |
| propertyArgs.pProperty = NULL; |
| CFX_WideString wsName; |
| for (;;) { |
| switch (pSyntax->DoSyntaxParse()) { |
| case FDE_CSSSYNTAXSTATUS_Selector: { |
| pszValue = pSyntax->GetCurrentString(iValueLen); |
| CFDE_CSSSelector* pSelector = |
| CFDE_CSSSelector::FromString(m_pAllocator, pszValue, iValueLen); |
| if (pSelector != NULL) { |
| m_Selectors.Add(pSelector); |
| } |
| } break; |
| case FDE_CSSSYNTAXSTATUS_PropertyName: |
| pszValue = pSyntax->GetCurrentString(iValueLen); |
| propertyArgs.pProperty = |
| FDE_GetCSSPropertyByName(CFX_WideStringC(pszValue, iValueLen)); |
| if (propertyArgs.pProperty == NULL) { |
| wsName = CFX_WideStringC(pszValue, iValueLen); |
| } |
| break; |
| case FDE_CSSSYNTAXSTATUS_PropertyValue: |
| if (propertyArgs.pProperty != NULL) { |
| pszValue = pSyntax->GetCurrentString(iValueLen); |
| if (iValueLen > 0) { |
| pStyleRule->GetDeclImp().AddProperty(&propertyArgs, pszValue, |
| iValueLen); |
| } |
| } else if (iValueLen > 0) { |
| pszValue = pSyntax->GetCurrentString(iValueLen); |
| if (iValueLen > 0) { |
| pStyleRule->GetDeclImp().AddProperty(&propertyArgs, wsName.c_str(), |
| wsName.GetLength(), pszValue, |
| iValueLen); |
| } |
| } |
| break; |
| case FDE_CSSSYNTAXSTATUS_DeclOpen: |
| if (pStyleRule == NULL && m_Selectors.GetSize() > 0) { |
| pStyleRule = FXTARGET_NewWith(m_pAllocator) CFDE_CSSStyleRule; |
| pStyleRule->SetSelector(m_pAllocator, m_Selectors); |
| ruleArray.Add(pStyleRule); |
| } else { |
| SkipRuleSet(pSyntax); |
| return FDE_CSSSYNTAXSTATUS_None; |
| } |
| break; |
| case FDE_CSSSYNTAXSTATUS_DeclClose: |
| if (pStyleRule != NULL && |
| pStyleRule->GetDeclImp().GetStartPosition() == NULL) { |
| pStyleRule->~CFDE_CSSStyleRule(); |
| ruleArray.RemoveLast(1); |
| } |
| return FDE_CSSSYNTAXSTATUS_None; |
| FDE_CSSSWITCHDEFAULTS(); |
| } |
| } |
| } |
| FDE_CSSSYNTAXSTATUS CFDE_CSSStyleSheet::LoadFontFaceRule( |
| CFDE_CSSSyntaxParser* pSyntax, |
| CFDE_CSSRuleArray& ruleArray) { |
| CFDE_CSSFontFaceRule* pFontFaceRule = NULL; |
| const FX_WCHAR* pszValue = NULL; |
| int32_t iValueLen = 0; |
| FDE_CSSPROPERTYARGS propertyArgs; |
| propertyArgs.pStaticStore = m_pAllocator; |
| propertyArgs.pStringCache = &m_StringCache; |
| propertyArgs.pProperty = NULL; |
| for (;;) { |
| switch (pSyntax->DoSyntaxParse()) { |
| case FDE_CSSSYNTAXSTATUS_PropertyName: |
| pszValue = pSyntax->GetCurrentString(iValueLen); |
| propertyArgs.pProperty = |
| FDE_GetCSSPropertyByName(CFX_WideStringC(pszValue, iValueLen)); |
| break; |
| case FDE_CSSSYNTAXSTATUS_PropertyValue: |
| if (propertyArgs.pProperty != NULL) { |
| pszValue = pSyntax->GetCurrentString(iValueLen); |
| if (iValueLen > 0) { |
| pFontFaceRule->GetDeclImp().AddProperty(&propertyArgs, pszValue, |
| iValueLen); |
| } |
| } |
| break; |
| case FDE_CSSSYNTAXSTATUS_DeclOpen: |
| if (pFontFaceRule == NULL) { |
| pFontFaceRule = FXTARGET_NewWith(m_pAllocator) CFDE_CSSFontFaceRule; |
| ruleArray.Add(pFontFaceRule); |
| } |
| break; |
| case FDE_CSSSYNTAXSTATUS_DeclClose: |
| return FDE_CSSSYNTAXSTATUS_None; |
| FDE_CSSSWITCHDEFAULTS(); |
| } |
| } |
| return FDE_CSSSYNTAXSTATUS_None; |
| } |
| FDE_CSSSYNTAXSTATUS CFDE_CSSStyleSheet::LoadImportRule( |
| CFDE_CSSSyntaxParser* pSyntax) { |
| for (;;) { |
| switch (pSyntax->DoSyntaxParse()) { |
| case FDE_CSSSYNTAXSTATUS_ImportClose: |
| return FDE_CSSSYNTAXSTATUS_None; |
| case FDE_CSSSYNTAXSTATUS_URI: |
| break; |
| FDE_CSSSWITCHDEFAULTS(); |
| } |
| } |
| } |
| FDE_CSSSYNTAXSTATUS CFDE_CSSStyleSheet::LoadPageRule( |
| CFDE_CSSSyntaxParser* pSyntax) { |
| return SkipRuleSet(pSyntax); |
| } |
| FDE_CSSSYNTAXSTATUS CFDE_CSSStyleSheet::SkipRuleSet( |
| CFDE_CSSSyntaxParser* pSyntax) { |
| for (;;) { |
| switch (pSyntax->DoSyntaxParse()) { |
| case FDE_CSSSYNTAXSTATUS_Selector: |
| case FDE_CSSSYNTAXSTATUS_DeclOpen: |
| case FDE_CSSSYNTAXSTATUS_PropertyName: |
| case FDE_CSSSYNTAXSTATUS_PropertyValue: |
| break; |
| case FDE_CSSSYNTAXSTATUS_DeclClose: |
| return FDE_CSSSYNTAXSTATUS_None; |
| FDE_CSSSWITCHDEFAULTS(); |
| } |
| } |
| return FDE_CSSSYNTAXSTATUS_None; |
| } |
| void CFDE_CSSStyleRule::SetSelector(IFX_MemoryAllocator* pStaticStore, |
| const CFDE_CSSSelectorArray& list) { |
| ASSERT(m_ppSelector == NULL); |
| m_iSelectors = list.GetSize(); |
| m_ppSelector = static_cast<CFDE_CSSSelector**>( |
| pStaticStore->Alloc(m_iSelectors * sizeof(CFDE_CSSSelector*))); |
| for (int32_t i = 0; i < m_iSelectors; ++i) { |
| m_ppSelector[i] = list.GetAt(i); |
| } |
| } |
| CFDE_CSSMediaRule::~CFDE_CSSMediaRule() { |
| for (int32_t i = m_RuleArray.GetSize() - 1; i >= 0; --i) { |
| IFDE_CSSRule* pRule = m_RuleArray.GetAt(i); |
| switch (pRule->GetType()) { |
| case FDE_CSSRULETYPE_Style: |
| ((CFDE_CSSStyleRule*)pRule)->~CFDE_CSSStyleRule(); |
| break; |
| default: |
| ASSERT(FALSE); |
| break; |
| } |
| } |
| } |
| inline FX_BOOL FDE_IsCSSChar(FX_WCHAR wch) { |
| return (wch >= 'a' && wch <= 'z') || (wch >= 'A' && wch <= 'Z'); |
| } |
| int32_t FDE_GetCSSPersudoLen(const FX_WCHAR* psz, const FX_WCHAR* pEnd) { |
| ASSERT(*psz == ':'); |
| const FX_WCHAR* pStart = psz; |
| while (psz < pEnd) { |
| FX_WCHAR wch = *psz; |
| if (FDE_IsCSSChar(wch) || wch == ':') { |
| ++psz; |
| } else { |
| break; |
| } |
| } |
| return psz - pStart; |
| } |
| int32_t FDE_GetCSSNameLen(const FX_WCHAR* psz, const FX_WCHAR* pEnd) { |
| const FX_WCHAR* pStart = psz; |
| while (psz < pEnd) { |
| FX_WCHAR wch = *psz; |
| if (FDE_IsCSSChar(wch) || (wch >= '0' && wch <= '9') || wch == '_' || |
| wch == '-') { |
| ++psz; |
| } else { |
| break; |
| } |
| } |
| return psz - pStart; |
| } |
| CFDE_CSSSelector* CFDE_CSSSelector::FromString( |
| IFX_MemoryAllocator* pStaticStore, |
| const FX_WCHAR* psz, |
| int32_t iLen) { |
| ASSERT(pStaticStore != NULL && psz != NULL && iLen > 0); |
| const FX_WCHAR* pStart = psz; |
| const FX_WCHAR* pEnd = psz + iLen; |
| for (; psz < pEnd; ++psz) { |
| switch (*psz) { |
| case '>': |
| case '[': |
| case '+': |
| return NULL; |
| } |
| } |
| CFDE_CSSSelector *pFirst = NULL, *pLast = NULL; |
| CFDE_CSSSelector *pPersudoFirst = NULL, *pPersudoLast = NULL; |
| for (psz = pStart; psz < pEnd;) { |
| FX_WCHAR wch = *psz; |
| if (wch == '.' || wch == '#') { |
| if (psz == pStart || psz[-1] == ' ') { |
| CFDE_CSSSelector* p = FXTARGET_NewWith(pStaticStore) |
| CFDE_CSSSelector(FDE_CSSSELECTORTYPE_Element, L"*", 1, true); |
| if (p == NULL) { |
| return NULL; |
| } |
| if (pFirst != NULL) { |
| pFirst->SetType(FDE_CSSSELECTORTYPE_Descendant); |
| p->SetNext(pFirst); |
| } |
| pFirst = pLast = p; |
| } |
| ASSERT(pLast != NULL); |
| int32_t iNameLen = FDE_GetCSSNameLen(++psz, pEnd); |
| if (iNameLen == 0) { |
| return NULL; |
| } |
| FDE_CSSSELECTORTYPE eType = |
| wch == '.' ? FDE_CSSSELECTORTYPE_Class : FDE_CSSSELECTORTYPE_ID; |
| CFDE_CSSSelector* p = FXTARGET_NewWith(pStaticStore) |
| CFDE_CSSSelector(eType, psz, iNameLen, false); |
| if (p == NULL) { |
| return NULL; |
| } |
| p->SetNext(pLast->GetNextSelector()); |
| pLast->SetNext(p); |
| pLast = p; |
| psz += iNameLen; |
| } else if (FDE_IsCSSChar(wch) || wch == '*') { |
| int32_t iNameLen = wch == '*' ? 1 : FDE_GetCSSNameLen(psz, pEnd); |
| if (iNameLen == 0) { |
| return NULL; |
| } |
| CFDE_CSSSelector* p = FXTARGET_NewWith(pStaticStore) |
| CFDE_CSSSelector(FDE_CSSSELECTORTYPE_Element, psz, iNameLen, true); |
| if (p == NULL) { |
| return NULL; |
| } |
| if (pFirst == NULL) { |
| pFirst = pLast = p; |
| } else { |
| pFirst->SetType(FDE_CSSSELECTORTYPE_Descendant); |
| p->SetNext(pFirst); |
| pFirst = pLast = p; |
| } |
| psz += iNameLen; |
| } else if (wch == ':') { |
| int32_t iNameLen = FDE_GetCSSPersudoLen(psz, pEnd); |
| if (iNameLen == 0) { |
| return NULL; |
| } |
| CFDE_CSSSelector* p = FXTARGET_NewWith(pStaticStore) |
| CFDE_CSSSelector(FDE_CSSSELECTORTYPE_Persudo, psz, iNameLen, true); |
| if (p == NULL) { |
| return NULL; |
| } |
| if (pPersudoFirst == NULL) { |
| pPersudoFirst = pPersudoLast = p; |
| } else { |
| pPersudoLast->SetNext(p); |
| pPersudoLast = p; |
| } |
| psz += iNameLen; |
| } else if (wch == ' ') { |
| psz++; |
| } else { |
| return NULL; |
| } |
| } |
| if (pPersudoFirst == NULL) { |
| return pFirst; |
| } else { |
| pPersudoLast->SetNext(pFirst); |
| return pPersudoFirst; |
| } |
| } |
