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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 #include "xfa/fxfa/parser/cxfa_radial.h"
      8 
      9 #include <utility>
     10 
     11 #include "fxjs/xfa/cjx_radial.h"
     12 #include "third_party/base/ptr_util.h"
     13 #include "xfa/fxfa/parser/cxfa_color.h"
     14 #include "xfa/fxgraphics/cxfa_geshading.h"
     15 
     16 namespace {
     17 
     18 const CXFA_Node::PropertyData kPropertyData[] = {{XFA_Element::Color, 1, 0},
     19                                                  {XFA_Element::Extras, 1, 0},
     20                                                  {XFA_Element::Unknown, 0, 0}};
     21 const CXFA_Node::AttributeData kAttributeData[] = {
     22     {XFA_Attribute::Id, XFA_AttributeType::CData, nullptr},
     23     {XFA_Attribute::Use, XFA_AttributeType::CData, nullptr},
     24     {XFA_Attribute::Type, XFA_AttributeType::Enum,
     25      (void*)XFA_AttributeEnum::ToEdge},
     26     {XFA_Attribute::Usehref, XFA_AttributeType::CData, nullptr},
     27     {XFA_Attribute::Unknown, XFA_AttributeType::Integer, nullptr}};
     28 
     29 constexpr wchar_t kName[] = L"radial";
     30 
     31 }  // namespace
     32 
     33 CXFA_Radial::CXFA_Radial(CXFA_Document* doc, XFA_PacketType packet)
     34     : CXFA_Node(doc,
     35                 packet,
     36                 (XFA_XDPPACKET_Template | XFA_XDPPACKET_Form),
     37                 XFA_ObjectType::Node,
     38                 XFA_Element::Radial,
     39                 kPropertyData,
     40                 kAttributeData,
     41                 kName,
     42                 pdfium::MakeUnique<CJX_Radial>(this)) {}
     43 
     44 CXFA_Radial::~CXFA_Radial() {}
     45 
     46 bool CXFA_Radial::IsToEdge() {
     47   return JSObject()
     48              ->TryEnum(XFA_Attribute::Type, true)
     49              .value_or(XFA_AttributeEnum::ToEdge) == XFA_AttributeEnum::ToEdge;
     50 }
     51 
     52 CXFA_Color* CXFA_Radial::GetColorIfExists() {
     53   return GetChild<CXFA_Color>(0, XFA_Element::Color, false);
     54 }
     55 
     56 void CXFA_Radial::Draw(CXFA_Graphics* pGS,
     57                        CXFA_GEPath* fillPath,
     58                        FX_ARGB crStart,
     59                        const CFX_RectF& rtFill,
     60                        const CFX_Matrix& matrix) {
     61   CXFA_Color* pColor = GetColorIfExists();
     62   FX_ARGB crEnd = pColor ? pColor->GetValue() : CXFA_Color::kBlackColor;
     63   if (!IsToEdge())
     64     std::swap(crStart, crEnd);
     65 
     66   float endRadius = sqrt(rtFill.Width() * rtFill.Width() +
     67                          rtFill.Height() * rtFill.Height()) /
     68                     2;
     69   CXFA_GEShading shading(rtFill.Center(), rtFill.Center(), 0, endRadius, true,
     70                          true, crStart, crEnd);
     71 
     72   pGS->SaveGraphState();
     73   pGS->SetFillColor(CXFA_GEColor(&shading));
     74   pGS->FillPath(fillPath, FXFILL_WINDING, &matrix);
     75   pGS->RestoreGraphState();
     76 }
     77