dom/base/DOMQuad.cpp

   1 /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
   2 /* vim: set ts=8 sts=2 et sw=2 tw=80: */
   3 /* This Source Code Form is subject to the terms of the Mozilla Public
   4  * License, v. 2.0. If a copy of the MPL was not distributed with this
   5  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
   6
   7 #include "mozilla/dom/DOMQuad.h"
   8
   9 #include "mozilla/dom/DOMQuadBinding.h"
  10 #include "mozilla/dom/DOMPoint.h"
  11 #include "mozilla/dom/DOMRect.h"
  12 #include <algorithm>
  13
  14 using namespace mozilla;
  15 using namespace mozilla::dom;
  16 using namespace mozilla::gfx;
  17
  18 NS_IMPL_CYCLE_COLLECTION_WRAPPERCACHE(DOMQuad, mParent, mBounds, mPoints[0],
  19                                       mPoints[1], mPoints[2], mPoints[3])
  20
  21 NS_IMPL_CYCLE_COLLECTION_ROOT_NATIVE(DOMQuad, AddRef)
  22 NS_IMPL_CYCLE_COLLECTION_UNROOT_NATIVE(DOMQuad, Release)
  23
  24 DOMQuad::DOMQuad(nsISupports* aParent, CSSPoint aPoints[4]) : mParent(aParent) {
  25   for (uint32_t i = 0; i < 4; ++i) {
  26     mPoints[i] = new DOMPoint(aParent, aPoints[i].x, aPoints[i].y);
  27   }
  28 }
  29
  30 DOMQuad::DOMQuad(nsISupports* aParent) : mParent(aParent) {}
  31
  32 DOMQuad::~DOMQuad() {}
  33
  34 JSObject* DOMQuad::WrapObject(JSContext* aCx,
  35                               JS::Handle<JSObject*> aGivenProto) {
  36   return DOMQuad_Binding::Wrap(aCx, this, aGivenProto);
  37 }
  38
  39 already_AddRefed<DOMQuad> DOMQuad::Constructor(const GlobalObject& aGlobal,
  40                                                const DOMPointInit& aP1,
  41                                                const DOMPointInit& aP2,
  42                                                const DOMPointInit& aP3,
  43                                                const DOMPointInit& aP4,
  44                                                ErrorResult& aRV) {
  45   RefPtr<DOMQuad> obj = new DOMQuad(aGlobal.GetAsSupports());
  46   obj->mPoints[0] = DOMPoint::FromPoint(aGlobal, aP1);
  47   obj->mPoints[1] = DOMPoint::FromPoint(aGlobal, aP2);
  48   obj->mPoints[2] = DOMPoint::FromPoint(aGlobal, aP3);
  49   obj->mPoints[3] = DOMPoint::FromPoint(aGlobal, aP4);
  50   return obj.forget();
  51 }
  52
  53 already_AddRefed<DOMQuad> DOMQuad::Constructor(const GlobalObject& aGlobal,
  54                                                const DOMRectReadOnly& aRect,
  55                                                ErrorResult& aRV) {
  56   CSSPoint points[4];
  57   Float x = aRect.X(), y = aRect.Y(), w = aRect.Width(), h = aRect.Height();
  58   points[0] = CSSPoint(x, y);
  59   points[1] = CSSPoint(x + w, y);
  60   points[2] = CSSPoint(x + w, y + h);
  61   points[3] = CSSPoint(x, y + h);
  62   RefPtr<DOMQuad> obj = new DOMQuad(aGlobal.GetAsSupports(), points);
  63   return obj.forget();
  64 }
  65
  66 void DOMQuad::GetHorizontalMinMax(double* aX1, double* aX2) const {
  67   double x1, x2;
  68   x1 = x2 = Point(0)->X();
  69   for (uint32_t i = 1; i < 4; ++i) {
  70     double x = Point(i)->X();
  71     x1 = std::min(x1, x);
  72     x2 = std::max(x2, x);
  73   }
  74   *aX1 = x1;
  75   *aX2 = x2;
  76 }
  77
  78 void DOMQuad::GetVerticalMinMax(double* aY1, double* aY2) const {
  79   double y1, y2;
  80   y1 = y2 = Point(0)->Y();
  81   for (uint32_t i = 1; i < 4; ++i) {
  82     double y = Point(i)->Y();
  83     y1 = std::min(y1, y);
  84     y2 = std::max(y2, y);
  85   }
  86   *aY1 = y1;
  87   *aY2 = y2;
  88 }
  89
  90 DOMRectReadOnly* DOMQuad::Bounds() {
  91   if (!mBounds) {
  92     mBounds = GetBounds();
  93   }
  94   return mBounds;
  95 }
  96
  97 already_AddRefed<DOMRectReadOnly> DOMQuad::GetBounds() const {
  98   double x1, x2;
  99   double y1, y2;
 100
 101   GetHorizontalMinMax(&x1, &x2);
 102   GetVerticalMinMax(&y1, &y2);
 103
 104   RefPtr<DOMRectReadOnly> rval =
 105       new DOMRectReadOnly(GetParentObject(), x1, y1, x2 - x1, y2 - y1);
 106   return rval.forget();
 107 }
 108
 109 void DOMQuad::ToJSON(DOMQuadJSON& aInit) {
 110   aInit.mP1.Construct(RefPtr<DOMPoint>(P1()).forget());
 111   aInit.mP2.Construct(RefPtr<DOMPoint>(P2()).forget());
 112   aInit.mP3.Construct(RefPtr<DOMPoint>(P3()).forget());
 113   aInit.mP4.Construct(RefPtr<DOMPoint>(P4()).forget());
 114 }