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      1 // Copyright 2017 PDFium Authors. All rights reserved.
      2 // Use of this source code is governed by a BSD-style license that can be
      3 // found in the LICENSE file.
      4 
      5 // Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
      6 
      7 #ifndef CORE_FXCRT_CSS_CFX_CSSSTYLESELECTOR_H_
      8 #define CORE_FXCRT_CSS_CFX_CSSSTYLESELECTOR_H_
      9 
     10 #include <memory>
     11 #include <vector>
     12 
     13 #include "core/fxcrt/css/cfx_css.h"
     14 #include "core/fxcrt/css/cfx_cssrulecollection.h"
     15 #include "core/fxcrt/fx_system.h"
     16 
     17 class CFX_CSSComputedStyle;
     18 class CFX_CSSCustomProperty;
     19 class CFX_CSSDeclaration;
     20 class CFX_CSSPropertyHolder;
     21 class CFX_CSSSelector;
     22 class CFX_CSSStyleSheet;
     23 class CFX_CSSValue;
     24 class CFX_CSSValueList;
     25 
     26 class CFX_CSSStyleSelector {
     27  public:
     28   CFX_CSSStyleSelector();
     29   ~CFX_CSSStyleSelector();
     30 
     31   void SetDefFontSize(float fFontSize);
     32   void SetUAStyleSheet(std::unique_ptr<CFX_CSSStyleSheet> pSheet);
     33   void UpdateStyleIndex();
     34 
     35   RetainPtr<CFX_CSSComputedStyle> CreateComputedStyle(
     36       CFX_CSSComputedStyle* pParentStyle);
     37 
     38   // Note, the dest style has to be an out param because the CXFA_TextParser
     39   // adds non-inherited data from the parent style. Attempting to copy
     40   // internally will fail as you'll lose the non-inherited data.
     41   void ComputeStyle(const std::vector<const CFX_CSSDeclaration*>& declArray,
     42                     const WideString& styleString,
     43                     const WideString& alignString,
     44                     CFX_CSSComputedStyle* pDestStyle);
     45 
     46   std::vector<const CFX_CSSDeclaration*> MatchDeclarations(
     47       const WideString& tagname);
     48 
     49  private:
     50   bool MatchSelector(const WideString& tagname, CFX_CSSSelector* pSel);
     51 
     52   void AppendInlineStyle(CFX_CSSDeclaration* pDecl, const WideString& style);
     53   void ApplyDeclarations(
     54       const std::vector<const CFX_CSSDeclaration*>& declArray,
     55       const CFX_CSSDeclaration* extraDecl,
     56       CFX_CSSComputedStyle* pDestStyle);
     57   void ApplyProperty(CFX_CSSProperty eProperty,
     58                      const RetainPtr<CFX_CSSValue>& pValue,
     59                      CFX_CSSComputedStyle* pComputedStyle);
     60   void ExtractValues(const CFX_CSSDeclaration* decl,
     61                      std::vector<const CFX_CSSPropertyHolder*>* importants,
     62                      std::vector<const CFX_CSSPropertyHolder*>* normals,
     63                      std::vector<const CFX_CSSCustomProperty*>* custom);
     64 
     65   bool SetLengthWithPercent(CFX_CSSLength& width,
     66                             CFX_CSSPrimitiveType eType,
     67                             const RetainPtr<CFX_CSSValue>& pValue,
     68                             float fFontSize);
     69   float ToFontSize(CFX_CSSPropertyValue eValue, float fCurFontSize);
     70   CFX_CSSDisplay ToDisplay(CFX_CSSPropertyValue eValue);
     71   CFX_CSSTextAlign ToTextAlign(CFX_CSSPropertyValue eValue);
     72   uint16_t ToFontWeight(CFX_CSSPropertyValue eValue);
     73   CFX_CSSFontStyle ToFontStyle(CFX_CSSPropertyValue eValue);
     74   CFX_CSSVerticalAlign ToVerticalAlign(CFX_CSSPropertyValue eValue);
     75   uint32_t ToTextDecoration(const RetainPtr<CFX_CSSValueList>& pList);
     76   CFX_CSSFontVariant ToFontVariant(CFX_CSSPropertyValue eValue);
     77 
     78   float m_fDefFontSize;
     79   std::unique_ptr<CFX_CSSStyleSheet> m_UAStyles;
     80   CFX_CSSRuleCollection m_UARules;
     81 };
     82 
     83 #endif  // CORE_FXCRT_CSS_CFX_CSSSTYLESELECTOR_H_
     84