diff options
Diffstat (limited to 'core/fxcrt/css/cfx_cssdeclaration.cpp')
| -rw-r--r-- | core/fxcrt/css/cfx_cssdeclaration.cpp | 634 |
1 files changed, 634 insertions, 0 deletions
diff --git a/core/fxcrt/css/cfx_cssdeclaration.cpp b/core/fxcrt/css/cfx_cssdeclaration.cpp new file mode 100644 index 0000000000..b65429edb7 --- /dev/null +++ b/core/fxcrt/css/cfx_cssdeclaration.cpp @@ -0,0 +1,634 @@ +// 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_cssdeclaration.h" + +#include "core/fxcrt/css/cfx_csscolorvalue.h" +#include "core/fxcrt/css/cfx_csscustomproperty.h" +#include "core/fxcrt/css/cfx_cssenumvalue.h" +#include "core/fxcrt/css/cfx_cssnumbervalue.h" +#include "core/fxcrt/css/cfx_csspropertyholder.h" +#include "core/fxcrt/css/cfx_cssstringvalue.h" +#include "core/fxcrt/css/cfx_cssvaluelist.h" +#include "core/fxcrt/css/cfx_cssvaluelistparser.h" +#include "core/fxcrt/fx_extension.h" +#include "third_party/base/logging.h" +#include "third_party/base/ptr_util.h" + +namespace { + +uint8_t Hex2Dec(uint8_t hexHigh, uint8_t hexLow) { + return (FXSYS_HexCharToInt(hexHigh) << 4) + FXSYS_HexCharToInt(hexLow); +} + +bool ParseCSSNumber(const wchar_t* pszValue, + int32_t iValueLen, + float& fValue, + CFX_CSSNumberType& eUnit) { + ASSERT(pszValue && iValueLen > 0); + int32_t iUsedLen = 0; + fValue = FXSYS_wcstof(pszValue, iValueLen, &iUsedLen); + if (iUsedLen <= 0) + return false; + + iValueLen -= iUsedLen; + pszValue += iUsedLen; + eUnit = CFX_CSSNumberType::Number; + if (iValueLen >= 1 && *pszValue == '%') { + eUnit = CFX_CSSNumberType::Percent; + } else if (iValueLen == 2) { + const CFX_CSSLengthUnitTable* pUnit = + CFX_GetCSSLengthUnitByName(CFX_WideStringC(pszValue, 2)); + if (pUnit) + eUnit = pUnit->wValue; + } + return true; +} + +} // namespace + +// static +bool CFX_CSSDeclaration::ParseCSSString(const wchar_t* pszValue, + int32_t iValueLen, + int32_t* iOffset, + int32_t* iLength) { + ASSERT(pszValue && iValueLen > 0); + *iOffset = 0; + *iLength = iValueLen; + if (iValueLen >= 2) { + wchar_t first = pszValue[0], last = pszValue[iValueLen - 1]; + if ((first == '\"' && last == '\"') || (first == '\'' && last == '\'')) { + *iOffset = 1; + *iLength -= 2; + } + } + return iValueLen > 0; +} + +// static. +bool CFX_CSSDeclaration::ParseCSSColor(const wchar_t* pszValue, + int32_t iValueLen, + FX_ARGB* dwColor) { + ASSERT(pszValue && iValueLen > 0); + ASSERT(dwColor); + + if (*pszValue == '#') { + switch (iValueLen) { + case 4: { + uint8_t red = Hex2Dec((uint8_t)pszValue[1], (uint8_t)pszValue[1]); + uint8_t green = Hex2Dec((uint8_t)pszValue[2], (uint8_t)pszValue[2]); + uint8_t blue = Hex2Dec((uint8_t)pszValue[3], (uint8_t)pszValue[3]); + *dwColor = ArgbEncode(255, red, green, blue); + return true; + } + case 7: { + uint8_t red = Hex2Dec((uint8_t)pszValue[1], (uint8_t)pszValue[2]); + uint8_t green = Hex2Dec((uint8_t)pszValue[3], (uint8_t)pszValue[4]); + uint8_t blue = Hex2Dec((uint8_t)pszValue[5], (uint8_t)pszValue[6]); + *dwColor = ArgbEncode(255, red, green, blue); + return true; + } + default: + return false; + } + } + + if (iValueLen >= 10) { + if (pszValue[iValueLen - 1] != ')' || FXSYS_wcsnicmp(L"rgb(", pszValue, 4)) + return false; + + uint8_t rgb[3] = {0}; + float fValue; + CFX_CSSPrimitiveType eType; + CFX_CSSValueListParser list(pszValue + 4, iValueLen - 5, ','); + for (int32_t i = 0; i < 3; ++i) { + if (!list.NextValue(eType, pszValue, iValueLen)) + return false; + if (eType != CFX_CSSPrimitiveType::Number) + return false; + CFX_CSSNumberType eNumType; + if (!ParseCSSNumber(pszValue, iValueLen, fValue, eNumType)) + return false; + + rgb[i] = eNumType == CFX_CSSNumberType::Percent + ? FXSYS_round(fValue * 2.55f) + : FXSYS_round(fValue); + } + *dwColor = ArgbEncode(255, rgb[0], rgb[1], rgb[2]); + return true; + } + + const CFX_CSSCOLORTABLE* pColor = + CFX_GetCSSColorByName(CFX_WideStringC(pszValue, iValueLen)); + if (!pColor) + return false; + + *dwColor = pColor->dwValue; + return true; +} + +CFX_CSSDeclaration::CFX_CSSDeclaration() {} + +CFX_CSSDeclaration::~CFX_CSSDeclaration() {} + +CFX_RetainPtr<CFX_CSSValue> CFX_CSSDeclaration::GetProperty( + CFX_CSSProperty eProperty, + bool* bImportant) const { + for (const auto& p : properties_) { + if (p->eProperty == eProperty) { + *bImportant = p->bImportant; + return p->pValue; + } + } + return nullptr; +} + +void CFX_CSSDeclaration::AddPropertyHolder(CFX_CSSProperty eProperty, + CFX_RetainPtr<CFX_CSSValue> pValue, + bool bImportant) { + auto pHolder = pdfium::MakeUnique<CFX_CSSPropertyHolder>(); + pHolder->bImportant = bImportant; + pHolder->eProperty = eProperty; + pHolder->pValue = pValue; + properties_.push_back(std::move(pHolder)); +} + +void CFX_CSSDeclaration::AddProperty(const CFX_CSSPropertyTable* pTable, + const CFX_WideStringC& value) { + ASSERT(!value.IsEmpty()); + + const wchar_t* pszValue = value.unterminated_c_str(); + int32_t iValueLen = value.GetLength(); + bool bImportant = false; + if (iValueLen >= 10 && pszValue[iValueLen - 10] == '!' && + FXSYS_wcsnicmp(L"important", pszValue + iValueLen - 9, 9) == 0) { + if ((iValueLen -= 10) == 0) + return; + + bImportant = true; + } + const uint32_t dwType = pTable->dwType; + switch (dwType & 0x0F) { + case CFX_CSSVALUETYPE_Primitive: { + static const uint32_t g_ValueGuessOrder[] = { + CFX_CSSVALUETYPE_MaybeNumber, CFX_CSSVALUETYPE_MaybeEnum, + CFX_CSSVALUETYPE_MaybeColor, CFX_CSSVALUETYPE_MaybeString, + }; + static const int32_t g_ValueGuessCount = + sizeof(g_ValueGuessOrder) / sizeof(uint32_t); + for (int32_t i = 0; i < g_ValueGuessCount; ++i) { + const uint32_t dwMatch = dwType & g_ValueGuessOrder[i]; + if (dwMatch == 0) { + continue; + } + CFX_RetainPtr<CFX_CSSValue> pCSSValue; + switch (dwMatch) { + case CFX_CSSVALUETYPE_MaybeNumber: + pCSSValue = ParseNumber(pszValue, iValueLen); + break; + case CFX_CSSVALUETYPE_MaybeEnum: + pCSSValue = ParseEnum(pszValue, iValueLen); + break; + case CFX_CSSVALUETYPE_MaybeColor: + pCSSValue = ParseColor(pszValue, iValueLen); + break; + case CFX_CSSVALUETYPE_MaybeString: + pCSSValue = ParseString(pszValue, iValueLen); + break; + default: + break; + } + if (pCSSValue) { + AddPropertyHolder(pTable->eName, pCSSValue, bImportant); + return; + } + if (CFX_IsOnlyValue(dwType, g_ValueGuessOrder[i])) + return; + } + break; + } + case CFX_CSSVALUETYPE_Shorthand: { + CFX_RetainPtr<CFX_CSSValue> pWidth; + switch (pTable->eName) { + case CFX_CSSProperty::Font: + ParseFontProperty(pszValue, iValueLen, bImportant); + return; + case CFX_CSSProperty::Border: + if (ParseBorderProperty(pszValue, iValueLen, pWidth)) { + AddPropertyHolder(CFX_CSSProperty::BorderLeftWidth, pWidth, + bImportant); + AddPropertyHolder(CFX_CSSProperty::BorderTopWidth, pWidth, + bImportant); + AddPropertyHolder(CFX_CSSProperty::BorderRightWidth, pWidth, + bImportant); + AddPropertyHolder(CFX_CSSProperty::BorderBottomWidth, pWidth, + bImportant); + return; + } + break; + case CFX_CSSProperty::BorderLeft: + if (ParseBorderProperty(pszValue, iValueLen, pWidth)) { + AddPropertyHolder(CFX_CSSProperty::BorderLeftWidth, pWidth, + bImportant); + return; + } + break; + case CFX_CSSProperty::BorderTop: + if (ParseBorderProperty(pszValue, iValueLen, pWidth)) { + AddPropertyHolder(CFX_CSSProperty::BorderTopWidth, pWidth, + bImportant); + return; + } + break; + case CFX_CSSProperty::BorderRight: + if (ParseBorderProperty(pszValue, iValueLen, pWidth)) { + AddPropertyHolder(CFX_CSSProperty::BorderRightWidth, pWidth, + bImportant); + return; + } + break; + case CFX_CSSProperty::BorderBottom: + if (ParseBorderProperty(pszValue, iValueLen, pWidth)) { + AddPropertyHolder(CFX_CSSProperty::BorderBottomWidth, pWidth, + bImportant); + return; + } + break; + default: + break; + } + } break; + case CFX_CSSVALUETYPE_List: + ParseValueListProperty(pTable, pszValue, iValueLen, bImportant); + return; + default: + NOTREACHED(); + break; + } +} + +void CFX_CSSDeclaration::AddProperty(const CFX_WideString& prop, + const CFX_WideString& value) { + custom_properties_.push_back( + pdfium::MakeUnique<CFX_CSSCustomProperty>(prop, value)); +} + +CFX_RetainPtr<CFX_CSSValue> CFX_CSSDeclaration::ParseNumber( + const wchar_t* pszValue, + int32_t iValueLen) { + float fValue; + CFX_CSSNumberType eUnit; + if (!ParseCSSNumber(pszValue, iValueLen, fValue, eUnit)) + return nullptr; + return pdfium::MakeRetain<CFX_CSSNumberValue>(eUnit, fValue); +} + +CFX_RetainPtr<CFX_CSSValue> CFX_CSSDeclaration::ParseEnum( + const wchar_t* pszValue, + int32_t iValueLen) { + const CFX_CSSPropertyValueTable* pValue = + CFX_GetCSSPropertyValueByName(CFX_WideStringC(pszValue, iValueLen)); + return pValue ? pdfium::MakeRetain<CFX_CSSEnumValue>(pValue->eName) : nullptr; +} + +CFX_RetainPtr<CFX_CSSValue> CFX_CSSDeclaration::ParseColor( + const wchar_t* pszValue, + int32_t iValueLen) { + FX_ARGB dwColor; + if (!ParseCSSColor(pszValue, iValueLen, &dwColor)) + return nullptr; + return pdfium::MakeRetain<CFX_CSSColorValue>(dwColor); +} + +CFX_RetainPtr<CFX_CSSValue> CFX_CSSDeclaration::ParseString( + const wchar_t* pszValue, + int32_t iValueLen) { + int32_t iOffset; + if (!ParseCSSString(pszValue, iValueLen, &iOffset, &iValueLen)) + return nullptr; + + if (iValueLen <= 0) + return nullptr; + + return pdfium::MakeRetain<CFX_CSSStringValue>( + CFX_WideString(pszValue + iOffset, iValueLen)); +} + +void CFX_CSSDeclaration::ParseValueListProperty( + const CFX_CSSPropertyTable* pTable, + const wchar_t* pszValue, + int32_t iValueLen, + bool bImportant) { + wchar_t separator = + (pTable->eName == CFX_CSSProperty::FontFamily) ? ',' : ' '; + CFX_CSSValueListParser parser(pszValue, iValueLen, separator); + + const uint32_t dwType = pTable->dwType; + CFX_CSSPrimitiveType eType; + std::vector<CFX_RetainPtr<CFX_CSSValue>> list; + while (parser.NextValue(eType, pszValue, iValueLen)) { + switch (eType) { + case CFX_CSSPrimitiveType::Number: + if (dwType & CFX_CSSVALUETYPE_MaybeNumber) { + float fValue; + CFX_CSSNumberType eNumType; + if (ParseCSSNumber(pszValue, iValueLen, fValue, eNumType)) + list.push_back( + pdfium::MakeRetain<CFX_CSSNumberValue>(eNumType, fValue)); + } + break; + case CFX_CSSPrimitiveType::String: + if (dwType & CFX_CSSVALUETYPE_MaybeColor) { + FX_ARGB dwColor; + if (ParseCSSColor(pszValue, iValueLen, &dwColor)) { + list.push_back(pdfium::MakeRetain<CFX_CSSColorValue>(dwColor)); + continue; + } + } + if (dwType & CFX_CSSVALUETYPE_MaybeEnum) { + const CFX_CSSPropertyValueTable* pValue = + CFX_GetCSSPropertyValueByName( + CFX_WideStringC(pszValue, iValueLen)); + if (pValue) { + list.push_back(pdfium::MakeRetain<CFX_CSSEnumValue>(pValue->eName)); + continue; + } + } + if (dwType & CFX_CSSVALUETYPE_MaybeString) { + list.push_back(pdfium::MakeRetain<CFX_CSSStringValue>( + CFX_WideString(pszValue, iValueLen))); + } + break; + case CFX_CSSPrimitiveType::RGB: + if (dwType & CFX_CSSVALUETYPE_MaybeColor) { + FX_ARGB dwColor; + if (ParseCSSColor(pszValue, iValueLen, &dwColor)) { + list.push_back(pdfium::MakeRetain<CFX_CSSColorValue>(dwColor)); + } + } + break; + default: + break; + } + } + if (list.empty()) + return; + + switch (pTable->eName) { + case CFX_CSSProperty::BorderWidth: + Add4ValuesProperty(list, bImportant, CFX_CSSProperty::BorderLeftWidth, + CFX_CSSProperty::BorderTopWidth, + CFX_CSSProperty::BorderRightWidth, + CFX_CSSProperty::BorderBottomWidth); + return; + case CFX_CSSProperty::Margin: + Add4ValuesProperty(list, bImportant, CFX_CSSProperty::MarginLeft, + CFX_CSSProperty::MarginTop, + CFX_CSSProperty::MarginRight, + CFX_CSSProperty::MarginBottom); + return; + case CFX_CSSProperty::Padding: + Add4ValuesProperty(list, bImportant, CFX_CSSProperty::PaddingLeft, + CFX_CSSProperty::PaddingTop, + CFX_CSSProperty::PaddingRight, + CFX_CSSProperty::PaddingBottom); + return; + default: { + auto pList = pdfium::MakeRetain<CFX_CSSValueList>(list); + AddPropertyHolder(pTable->eName, pList, bImportant); + return; + } + } +} + +void CFX_CSSDeclaration::Add4ValuesProperty( + const std::vector<CFX_RetainPtr<CFX_CSSValue>>& list, + bool bImportant, + CFX_CSSProperty eLeft, + CFX_CSSProperty eTop, + CFX_CSSProperty eRight, + CFX_CSSProperty eBottom) { + switch (list.size()) { + case 1: + AddPropertyHolder(eLeft, list[0], bImportant); + AddPropertyHolder(eTop, list[0], bImportant); + AddPropertyHolder(eRight, list[0], bImportant); + AddPropertyHolder(eBottom, list[0], bImportant); + return; + case 2: + AddPropertyHolder(eLeft, list[1], bImportant); + AddPropertyHolder(eTop, list[0], bImportant); + AddPropertyHolder(eRight, list[1], bImportant); + AddPropertyHolder(eBottom, list[0], bImportant); + return; + case 3: + AddPropertyHolder(eLeft, list[1], bImportant); + AddPropertyHolder(eTop, list[0], bImportant); + AddPropertyHolder(eRight, list[1], bImportant); + AddPropertyHolder(eBottom, list[2], bImportant); + return; + case 4: + AddPropertyHolder(eLeft, list[3], bImportant); + AddPropertyHolder(eTop, list[0], bImportant); + AddPropertyHolder(eRight, list[1], bImportant); + AddPropertyHolder(eBottom, list[2], bImportant); + return; + default: + break; + } +} + +bool CFX_CSSDeclaration::ParseBorderProperty( + const wchar_t* pszValue, + int32_t iValueLen, + CFX_RetainPtr<CFX_CSSValue>& pWidth) const { + pWidth.Reset(nullptr); + + CFX_CSSValueListParser parser(pszValue, iValueLen, ' '); + CFX_CSSPrimitiveType eType; + while (parser.NextValue(eType, pszValue, iValueLen)) { + switch (eType) { + case CFX_CSSPrimitiveType::Number: { + if (pWidth) + continue; + + float fValue; + CFX_CSSNumberType eNumType; + if (ParseCSSNumber(pszValue, iValueLen, fValue, eNumType)) + pWidth = pdfium::MakeRetain<CFX_CSSNumberValue>(eNumType, fValue); + break; + } + case CFX_CSSPrimitiveType::String: { + const CFX_CSSCOLORTABLE* pColorItem = + CFX_GetCSSColorByName(CFX_WideStringC(pszValue, iValueLen)); + if (pColorItem) + continue; + + const CFX_CSSPropertyValueTable* pValue = + CFX_GetCSSPropertyValueByName(CFX_WideStringC(pszValue, iValueLen)); + if (!pValue) + continue; + + switch (pValue->eName) { + case CFX_CSSPropertyValue::Thin: + case CFX_CSSPropertyValue::Thick: + case CFX_CSSPropertyValue::Medium: + if (!pWidth) + pWidth = pdfium::MakeRetain<CFX_CSSEnumValue>(pValue->eName); + break; + default: + break; + } + break; + } + default: + break; + } + } + if (!pWidth) + pWidth = + pdfium::MakeRetain<CFX_CSSNumberValue>(CFX_CSSNumberType::Number, 0.0f); + + return true; +} + +void CFX_CSSDeclaration::ParseFontProperty(const wchar_t* pszValue, + int32_t iValueLen, + bool bImportant) { + CFX_CSSValueListParser parser(pszValue, iValueLen, '/'); + CFX_RetainPtr<CFX_CSSValue> pStyle; + CFX_RetainPtr<CFX_CSSValue> pVariant; + CFX_RetainPtr<CFX_CSSValue> pWeight; + CFX_RetainPtr<CFX_CSSValue> pFontSize; + CFX_RetainPtr<CFX_CSSValue> pLineHeight; + std::vector<CFX_RetainPtr<CFX_CSSValue>> familyList; + CFX_CSSPrimitiveType eType; + while (parser.NextValue(eType, pszValue, iValueLen)) { + switch (eType) { + case CFX_CSSPrimitiveType::String: { + const CFX_CSSPropertyValueTable* pValue = + CFX_GetCSSPropertyValueByName(CFX_WideStringC(pszValue, iValueLen)); + if (pValue) { + switch (pValue->eName) { + case CFX_CSSPropertyValue::XxSmall: + case CFX_CSSPropertyValue::XSmall: + case CFX_CSSPropertyValue::Small: + case CFX_CSSPropertyValue::Medium: + case CFX_CSSPropertyValue::Large: + case CFX_CSSPropertyValue::XLarge: + case CFX_CSSPropertyValue::XxLarge: + case CFX_CSSPropertyValue::Smaller: + case CFX_CSSPropertyValue::Larger: + if (!pFontSize) + pFontSize = pdfium::MakeRetain<CFX_CSSEnumValue>(pValue->eName); + continue; + case CFX_CSSPropertyValue::Bold: + case CFX_CSSPropertyValue::Bolder: + case CFX_CSSPropertyValue::Lighter: + if (!pWeight) + pWeight = pdfium::MakeRetain<CFX_CSSEnumValue>(pValue->eName); + continue; + case CFX_CSSPropertyValue::Italic: + case CFX_CSSPropertyValue::Oblique: + if (!pStyle) + pStyle = pdfium::MakeRetain<CFX_CSSEnumValue>(pValue->eName); + continue; + case CFX_CSSPropertyValue::SmallCaps: + if (!pVariant) + pVariant = pdfium::MakeRetain<CFX_CSSEnumValue>(pValue->eName); + continue; + case CFX_CSSPropertyValue::Normal: + if (!pStyle) + pStyle = pdfium::MakeRetain<CFX_CSSEnumValue>(pValue->eName); + else if (!pVariant) + pVariant = pdfium::MakeRetain<CFX_CSSEnumValue>(pValue->eName); + else if (!pWeight) + pWeight = pdfium::MakeRetain<CFX_CSSEnumValue>(pValue->eName); + else if (!pFontSize) + pFontSize = pdfium::MakeRetain<CFX_CSSEnumValue>(pValue->eName); + else if (!pLineHeight) + pLineHeight = + pdfium::MakeRetain<CFX_CSSEnumValue>(pValue->eName); + continue; + default: + break; + } + } + if (pFontSize) { + familyList.push_back(pdfium::MakeRetain<CFX_CSSStringValue>( + CFX_WideString(pszValue, iValueLen))); + } + parser.m_Separator = ','; + break; + } + case CFX_CSSPrimitiveType::Number: { + float fValue; + CFX_CSSNumberType eNumType; + if (!ParseCSSNumber(pszValue, iValueLen, fValue, eNumType)) + break; + if (eType == CFX_CSSPrimitiveType::Number) { + switch ((int32_t)fValue) { + case 100: + case 200: + case 300: + case 400: + case 500: + case 600: + case 700: + case 800: + case 900: + if (!pWeight) + pWeight = pdfium::MakeRetain<CFX_CSSNumberValue>( + CFX_CSSNumberType::Number, fValue); + continue; + } + } + if (!pFontSize) + pFontSize = pdfium::MakeRetain<CFX_CSSNumberValue>(eNumType, fValue); + else if (!pLineHeight) + pLineHeight = + pdfium::MakeRetain<CFX_CSSNumberValue>(eNumType, fValue); + break; + } + default: + break; + } + } + + if (!pStyle) { + pStyle = pdfium::MakeRetain<CFX_CSSEnumValue>(CFX_CSSPropertyValue::Normal); + } + if (!pVariant) { + pVariant = + pdfium::MakeRetain<CFX_CSSEnumValue>(CFX_CSSPropertyValue::Normal); + } + if (!pWeight) { + pWeight = + pdfium::MakeRetain<CFX_CSSEnumValue>(CFX_CSSPropertyValue::Normal); + } + if (!pFontSize) { + pFontSize = + pdfium::MakeRetain<CFX_CSSEnumValue>(CFX_CSSPropertyValue::Medium); + } + if (!pLineHeight) { + pLineHeight = + pdfium::MakeRetain<CFX_CSSEnumValue>(CFX_CSSPropertyValue::Normal); + } + + AddPropertyHolder(CFX_CSSProperty::FontStyle, pStyle, bImportant); + AddPropertyHolder(CFX_CSSProperty::FontVariant, pVariant, bImportant); + AddPropertyHolder(CFX_CSSProperty::FontWeight, pWeight, bImportant); + AddPropertyHolder(CFX_CSSProperty::FontSize, pFontSize, bImportant); + AddPropertyHolder(CFX_CSSProperty::LineHeight, pLineHeight, bImportant); + if (!familyList.empty()) { + auto pList = pdfium::MakeRetain<CFX_CSSValueList>(familyList); + AddPropertyHolder(CFX_CSSProperty::FontFamily, pList, bImportant); + } +} + +size_t CFX_CSSDeclaration::PropertyCountForTesting() const { + return properties_.size(); +} |