Move rectangle drawing code to CXFA_Rectangle

This CL moves code related to drawing rectangles to the CXFA_Rectangle
class. This also turns CXFA_Border into a CXFA_Rectangle to share the
drawing code.

Change-Id: I91e2e73b33ecbcda477cf953cf7609310a01fcd4
Reviewed-on: https://pdfium-review.googlesource.com/23110
Reviewed-by: Ryan Harrison <rharrison@chromium.org>
Commit-Queue: Ryan Harrison <rharrison@chromium.org>
Commit-Queue: dsinclair <dsinclair@chromium.org>

1 files changed, 9 insertions, 415 deletions

diff --git a/xfa/fxfa/parser/cxfa_box.cpp b/xfa/fxfa/parser/cxfa_box.cpp
index a62ce01146..01e51b313b 100644
--- a/xfa/fxfa/parser/cxfa_box.cpp
+++ b/xfa/fxfa/parser/cxfa_box.cpp
@@ -15,6 +15,7 @@
 #include "xfa/fxfa/parser/cxfa_margin.h"
 #include "xfa/fxfa/parser/cxfa_measurement.h"
 #include "xfa/fxfa/parser/cxfa_node.h"
+#include "xfa/fxfa/parser/cxfa_rectangle.h"
 #include "xfa/fxgraphics/cxfa_gepath.h"
 #include "xfa/fxgraphics/cxfa_gepattern.h"
 #include "xfa/fxgraphics/cxfa_geshading.h"
@@ -76,176 +77,6 @@ void XFA_BOX_GetPath_Arc(CXFA_Box* box,
                   -sweepAngle.value_or(360) * FX_PI / 180.0f);
 }
 
-void XFA_BOX_GetPath(const std::vector<CXFA_Stroke*>& strokes,
-                     CFX_RectF rtWidget,
-                     CXFA_GEPath& path,
-                     int32_t nIndex,
-                     bool bStart,
-                     bool bCorner) {
-  ASSERT(nIndex >= 0 && nIndex < 8);
-
-  int32_t n = (nIndex & 1) ? nIndex - 1 : nIndex;
-  auto* corner1 = static_cast<CXFA_Corner*>(strokes[n]);
-  auto* corner2 = static_cast<CXFA_Corner*>(strokes[(n + 2) % 8]);
-  float fRadius1 = bCorner ? corner1->GetRadius() : 0.0f;
-  float fRadius2 = bCorner ? corner2->GetRadius() : 0.0f;
-  bool bInverted = corner1->IsInverted();
-  float offsetY = 0.0f;
-  float offsetX = 0.0f;
-  bool bRound = corner1->GetJoinType() == XFA_AttributeEnum::Round;
-  float halfAfter = 0.0f;
-  float halfBefore = 0.0f;
-
-  CXFA_Stroke* stroke = strokes[nIndex];
-  if (stroke->IsCorner()) {
-    CXFA_Stroke* strokeBefore = strokes[(nIndex + 1 * 8 - 1) % 8];
-    CXFA_Stroke* strokeAfter = strokes[nIndex + 1];
-    if (stroke->IsInverted()) {
-      if (!stroke->SameStyles(strokeBefore, 0))
-        halfBefore = strokeBefore->GetThickness() / 2;
-      if (!stroke->SameStyles(strokeAfter, 0))
-        halfAfter = strokeAfter->GetThickness() / 2;
-    }
-  } else {
-    CXFA_Stroke* strokeBefore = strokes[(nIndex + 8 - 2) % 8];
-    CXFA_Stroke* strokeAfter = strokes[(nIndex + 2) % 8];
-    if (!bRound && !bInverted) {
-      halfBefore = strokeBefore->GetThickness() / 2;
-      halfAfter = strokeAfter->GetThickness() / 2;
-    }
-  }
-
-  float offsetEX = 0.0f;
-  float offsetEY = 0.0f;
-  float sx = 0.0f;
-  float sy = 0.0f;
-  float vx = 1.0f;
-  float vy = 1.0f;
-  float nx = 1.0f;
-  float ny = 1.0f;
-  CFX_PointF cpStart;
-  CFX_PointF cp1;
-  CFX_PointF cp2;
-  if (bRound) {
-    sy = FX_PI / 2;
-  }
-  switch (nIndex) {
-    case 0:
-    case 1:
-      cp1 = rtWidget.TopLeft();
-      cp2 = rtWidget.TopRight();
-      if (nIndex == 0) {
-        cpStart.x = cp1.x - halfBefore;
-        cpStart.y = cp1.y + fRadius1, offsetY = -halfAfter;
-      } else {
-        cpStart.x = cp1.x + fRadius1 - halfBefore, cpStart.y = cp1.y,
-        offsetEX = halfAfter;
-      }
-      vx = 1, vy = 1;
-      nx = -1, ny = 0;
-      if (bRound) {
-        sx = bInverted ? FX_PI / 2 : FX_PI;
-      } else {
-        sx = 1, sy = 0;
-      }
-      break;
-    case 2:
-    case 3:
-      cp1 = rtWidget.TopRight();
-      cp2 = rtWidget.BottomRight();
-      if (nIndex == 2) {
-        cpStart.x = cp1.x - fRadius1, cpStart.y = cp1.y - halfBefore,
-        offsetX = halfAfter;
-      } else {
-        cpStart.x = cp1.x, cpStart.y = cp1.y + fRadius1 - halfBefore,
-        offsetEY = halfAfter;
-      }
-      vx = -1, vy = 1;
-      nx = 0, ny = -1;
-      if (bRound) {
-        sx = bInverted ? FX_PI : FX_PI * 3 / 2;
-      } else {
-        sx = 0, sy = 1;
-      }
-      break;
-    case 4:
-    case 5:
-      cp1 = rtWidget.BottomRight();
-      cp2 = rtWidget.BottomLeft();
-      if (nIndex == 4) {
-        cpStart.x = cp1.x + halfBefore, cpStart.y = cp1.y - fRadius1,
-        offsetY = halfAfter;
-      } else {
-        cpStart.x = cp1.x - fRadius1 + halfBefore, cpStart.y = cp1.y,
-        offsetEX = -halfAfter;
-      }
-      vx = -1, vy = -1;
-      nx = 1, ny = 0;
-      if (bRound) {
-        sx = bInverted ? FX_PI * 3 / 2 : 0;
-      } else {
-        sx = -1, sy = 0;
-      }
-      break;
-    case 6:
-    case 7:
-      cp1 = rtWidget.BottomLeft();
-      cp2 = rtWidget.TopLeft();
-      if (nIndex == 6) {
-        cpStart.x = cp1.x + fRadius1, cpStart.y = cp1.y + halfBefore,
-        offsetX = -halfAfter;
-      } else {
-        cpStart.x = cp1.x, cpStart.y = cp1.y - fRadius1 + halfBefore,
-        offsetEY = -halfAfter;
-      }
-      vx = 1;
-      vy = -1;
-      nx = 0;
-      ny = 1;
-      if (bRound) {
-        sx = bInverted ? 0 : FX_PI / 2;
-      } else {
-        sx = 0;
-        sy = -1;
-      }
-      break;
-  }
-  if (bStart) {
-    path.MoveTo(cpStart);
-  }
-  if (nIndex & 1) {
-    path.LineTo(CFX_PointF(cp2.x + fRadius2 * nx + offsetEX,
-                           cp2.y + fRadius2 * ny + offsetEY));
-    return;
-  }
-  if (bRound) {
-    if (fRadius1 < 0)
-      sx -= FX_PI;
-    if (bInverted)
-      sy *= -1;
-
-    CFX_RectF rtRadius(cp1.x + offsetX * 2, cp1.y + offsetY * 2,
-                       fRadius1 * 2 * vx - offsetX * 2,
-                       fRadius1 * 2 * vy - offsetY * 2);
-    rtRadius.Normalize();
-    if (bInverted)
-      rtRadius.Offset(-fRadius1 * vx, -fRadius1 * vy);
-
-    path.ArcTo(rtRadius.TopLeft(), rtRadius.Size(), sx, sy);
-  } else {
-    CFX_PointF cp;
-    if (bInverted) {
-      cp.x = cp1.x + fRadius1 * vx;
-      cp.y = cp1.y + fRadius1 * vy;
-    } else {
-      cp = cp1;
-    }
-    path.LineTo(cp);
-    path.LineTo(CFX_PointF(cp1.x + fRadius1 * sx + offsetX,
-                           cp1.y + fRadius1 * sy + offsetY));
-  }
-}
-
 void XFA_BOX_GetFillPath(CXFA_Box* box,
                          const std::vector<CXFA_Stroke*>& strokes,
                          CFX_RectF rtWidget,
@@ -483,250 +314,6 @@ void XFA_BOX_StrokeArc(CXFA_Box* box,
   pGS->RestoreGraphState();
 }
 
-void XFA_Draw3DRect(CXFA_Graphics* pGraphic,
-                    const CFX_RectF& rt,
-                    float fLineWidth,
-                    const CFX_Matrix& matrix,
-                    FX_ARGB argbTopLeft,
-                    FX_ARGB argbBottomRight) {
-  float fBottom = rt.bottom();
-  float fRight = rt.right();
-  CXFA_GEPath pathLT;
-  pathLT.MoveTo(CFX_PointF(rt.left, fBottom));
-  pathLT.LineTo(CFX_PointF(rt.left, rt.top));
-  pathLT.LineTo(CFX_PointF(fRight, rt.top));
-  pathLT.LineTo(CFX_PointF(fRight - fLineWidth, rt.top + fLineWidth));
-  pathLT.LineTo(CFX_PointF(rt.left + fLineWidth, rt.top + fLineWidth));
-  pathLT.LineTo(CFX_PointF(rt.left + fLineWidth, fBottom - fLineWidth));
-  pathLT.LineTo(CFX_PointF(rt.left, fBottom));
-  pGraphic->SetFillColor(CXFA_GEColor(argbTopLeft));
-  pGraphic->FillPath(&pathLT, FXFILL_WINDING, &matrix);
-
-  CXFA_GEPath pathRB;
-  pathRB.MoveTo(CFX_PointF(fRight, rt.top));
-  pathRB.LineTo(CFX_PointF(fRight, fBottom));
-  pathRB.LineTo(CFX_PointF(rt.left, fBottom));
-  pathRB.LineTo(CFX_PointF(rt.left + fLineWidth, fBottom - fLineWidth));
-  pathRB.LineTo(CFX_PointF(fRight - fLineWidth, fBottom - fLineWidth));
-  pathRB.LineTo(CFX_PointF(fRight - fLineWidth, rt.top + fLineWidth));
-  pathRB.LineTo(CFX_PointF(fRight, rt.top));
-  pGraphic->SetFillColor(CXFA_GEColor(argbBottomRight));
-  pGraphic->FillPath(&pathRB, FXFILL_WINDING, &matrix);
-}
-
-void XFA_BOX_Stroke_3DRect_Lowered(CXFA_Graphics* pGS,
-                                   CFX_RectF rt,
-                                   float fThickness,
-                                   const CFX_Matrix& matrix) {
-  float fHalfWidth = fThickness / 2.0f;
-  CFX_RectF rtInner(rt);
-  rtInner.Deflate(fHalfWidth, fHalfWidth);
-
-  CXFA_GEPath path;
-  path.AddRectangle(rt.left, rt.top, rt.width, rt.height);
-  path.AddRectangle(rtInner.left, rtInner.top, rtInner.width, rtInner.height);
-  pGS->SetFillColor(CXFA_GEColor(0xFF000000));
-  pGS->FillPath(&path, FXFILL_ALTERNATE, &matrix);
-  XFA_Draw3DRect(pGS, rtInner, fHalfWidth, matrix, 0xFF808080, 0xFFC0C0C0);
-}
-
-void XFA_BOX_Stroke_3DRect_Raised(CXFA_Graphics* pGS,
-                                  CFX_RectF rt,
-                                  float fThickness,
-                                  const CFX_Matrix& matrix) {
-  float fHalfWidth = fThickness / 2.0f;
-  CFX_RectF rtInner(rt);
-  rtInner.Deflate(fHalfWidth, fHalfWidth);
-
-  CXFA_GEPath path;
-  path.AddRectangle(rt.left, rt.top, rt.width, rt.height);
-  path.AddRectangle(rtInner.left, rtInner.top, rtInner.width, rtInner.height);
-  pGS->SetFillColor(CXFA_GEColor(0xFF000000));
-  pGS->FillPath(&path, FXFILL_ALTERNATE, &matrix);
-  XFA_Draw3DRect(pGS, rtInner, fHalfWidth, matrix, 0xFFFFFFFF, 0xFF808080);
-}
-
-void XFA_BOX_Stroke_3DRect_Etched(CXFA_Graphics* pGS,
-                                  CFX_RectF rt,
-                                  float fThickness,
-                                  const CFX_Matrix& matrix) {
-  float fHalfWidth = fThickness / 2.0f;
-  XFA_Draw3DRect(pGS, rt, fThickness, matrix, 0xFF808080, 0xFFFFFFFF);
-  CFX_RectF rtInner(rt);
-  rtInner.Deflate(fHalfWidth, fHalfWidth);
-  XFA_Draw3DRect(pGS, rtInner, fHalfWidth, matrix, 0xFFFFFFFF, 0xFF808080);
-}
-
-void XFA_BOX_Stroke_3DRect_Embossed(CXFA_Graphics* pGS,
-                                    CFX_RectF rt,
-                                    float fThickness,
-                                    const CFX_Matrix& matrix) {
-  float fHalfWidth = fThickness / 2.0f;
-  XFA_Draw3DRect(pGS, rt, fThickness, matrix, 0xFF808080, 0xFF000000);
-  CFX_RectF rtInner(rt);
-  rtInner.Deflate(fHalfWidth, fHalfWidth);
-  XFA_Draw3DRect(pGS, rtInner, fHalfWidth, matrix, 0xFF000000, 0xFF808080);
-}
-
-void XFA_BOX_Stroke_Rect(CXFA_Box* box,
-                         const std::vector<CXFA_Stroke*>& strokes,
-                         CXFA_Graphics* pGS,
-                         CFX_RectF rtWidget,
-                         const CFX_Matrix& matrix) {
-  bool bVisible;
-  float fThickness;
-  XFA_AttributeEnum i3DType;
-  std::tie(i3DType, bVisible, fThickness) = box->Get3DStyle();
-  if (i3DType != XFA_AttributeEnum::Unknown) {
-    if (!bVisible || fThickness < 0.001f) {
-      return;
-    }
-    switch (i3DType) {
-      case XFA_AttributeEnum::Lowered:
-        XFA_BOX_Stroke_3DRect_Lowered(pGS, rtWidget, fThickness, matrix);
-        break;
-      case XFA_AttributeEnum::Raised:
-        XFA_BOX_Stroke_3DRect_Raised(pGS, rtWidget, fThickness, matrix);
-        break;
-      case XFA_AttributeEnum::Etched:
-        XFA_BOX_Stroke_3DRect_Etched(pGS, rtWidget, fThickness, matrix);
-        break;
-      case XFA_AttributeEnum::Embossed:
-        XFA_BOX_Stroke_3DRect_Embossed(pGS, rtWidget, fThickness, matrix);
-        break;
-      default:
-        NOTREACHED();
-        break;
-    }
-    return;
-  }
-  bool bClose = false;
-  bool bSameStyles = true;
-  CXFA_Stroke* stroke1 = strokes[0];
-  for (int32_t i = 1; i < 8; i++) {
-    CXFA_Stroke* stroke2 = strokes[i];
-    if (!stroke1->SameStyles(stroke2, 0)) {
-      bSameStyles = false;
-      break;
-    }
-    stroke1 = stroke2;
-  }
-  if (bSameStyles) {
-    stroke1 = strokes[0];
-    bClose = true;
-    for (int32_t i = 2; i < 8; i += 2) {
-      CXFA_Stroke* stroke2 = strokes[i];
-      if (!stroke1->SameStyles(stroke2, XFA_STROKE_SAMESTYLE_NoPresence |
-                                            XFA_STROKE_SAMESTYLE_Corner)) {
-        bSameStyles = false;
-        break;
-      }
-      stroke1 = stroke2;
-    }
-    if (bSameStyles) {
-      stroke1 = strokes[0];
-      if (stroke1->IsInverted())
-        bSameStyles = false;
-      if (stroke1->GetJoinType() != XFA_AttributeEnum::Square)
-        bSameStyles = false;
-    }
-  }
-  bool bStart = true;
-  CXFA_GEPath path;
-  for (int32_t i = 0; i < 8; i++) {
-    CXFA_Stroke* stroke = strokes[i];
-    if ((i % 1) == 0 && stroke->GetRadius() < 0) {
-      bool bEmpty = path.IsEmpty();
-      if (!bEmpty) {
-        if (stroke)
-          stroke->Stroke(&path, pGS, matrix);
-        path.Clear();
-      }
-      bStart = true;
-      continue;
-    }
-    XFA_BOX_GetPath(strokes, rtWidget, path, i, bStart, !bSameStyles);
-
-    bStart = !stroke->SameStyles(strokes[(i + 1) % 8], 0);
-    if (bStart) {
-      if (stroke)
-        stroke->Stroke(&path, pGS, matrix);
-      path.Clear();
-    }
-  }
-  bool bEmpty = path.IsEmpty();
-  if (!bEmpty) {
-    if (bClose) {
-      path.Close();
-    }
-    if (strokes[7])
-      strokes[7]->Stroke(&path, pGS, matrix);
-  }
-}
-
-void XFA_BOX_Stroke(CXFA_Box* box,
-                    const std::vector<CXFA_Stroke*>& strokes,
-                    CXFA_Graphics* pGS,
-                    CFX_RectF rtWidget,
-                    const CFX_Matrix& matrix,
-                    bool forceRound) {
-  if (box->IsArc() || forceRound) {
-    XFA_BOX_StrokeArc(box, pGS, rtWidget, matrix, forceRound);
-    return;
-  }
-
-  bool bVisible = false;
-  for (int32_t j = 0; j < 4; j++) {
-    if (strokes[j * 2 + 1]->IsVisible()) {
-      bVisible = true;
-      break;
-    }
-  }
-  if (!bVisible)
-    return;
-
-  for (int32_t i = 1; i < 8; i += 2) {
-    float fThickness = std::fmax(0.0, strokes[i]->GetThickness());
-    float fHalf = fThickness / 2;
-    XFA_AttributeEnum iHand = box->GetHand();
-    switch (i) {
-      case 1:
-        if (iHand == XFA_AttributeEnum::Left) {
-          rtWidget.top -= fHalf;
-          rtWidget.height += fHalf;
-        } else if (iHand == XFA_AttributeEnum::Right) {
-          rtWidget.top += fHalf;
-          rtWidget.height -= fHalf;
-        }
-        break;
-      case 3:
-        if (iHand == XFA_AttributeEnum::Left) {
-          rtWidget.width += fHalf;
-        } else if (iHand == XFA_AttributeEnum::Right) {
-          rtWidget.width -= fHalf;
-        }
-        break;
-      case 5:
-        if (iHand == XFA_AttributeEnum::Left) {
-          rtWidget.height += fHalf;
-        } else if (iHand == XFA_AttributeEnum::Right) {
-          rtWidget.height -= fHalf;
-        }
-        break;
-      case 7:
-        if (iHand == XFA_AttributeEnum::Left) {
-          rtWidget.left -= fHalf;
-          rtWidget.width += fHalf;
-        } else if (iHand == XFA_AttributeEnum::Right) {
-          rtWidget.left += fHalf;
-          rtWidget.width -= fHalf;
-        }
-        break;
-    }
-  }
-  XFA_BOX_Stroke_Rect(box, strokes, pGS, rtWidget, matrix);
-}
-
 }  // namespace
 
 CXFA_Box::CXFA_Box(CXFA_Document* pDoc,
@@ -877,7 +464,14 @@ void CXFA_Box::Draw(CXFA_Graphics* pGS,
     strokes = GetStrokes();
 
   DrawFill(strokes, pGS, rtWidget, matrix, forceRound);
-  XFA_BOX_Stroke(this, strokes, pGS, rtWidget, matrix, forceRound);
+  XFA_Element type = GetElementType();
+  if (type == XFA_Element::Arc || forceRound) {
+    XFA_BOX_StrokeArc(this, pGS, rtWidget, matrix, forceRound);
+  } else if (type == XFA_Element::Rectangle || type == XFA_Element::Border) {
+    static_cast<CXFA_Rectangle*>(this)->Draw(strokes, pGS, rtWidget, matrix);
+  } else {
+    NOTREACHED();
+  }
 }
 
 void CXFA_Box::DrawFill(const std::vector<CXFA_Stroke*>& strokes,