Line data    Source code

       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/DOMRect.h"
       8             : 
       9             : #include "nsPresContext.h"
      10             : #include "mozilla/dom/DOMRectListBinding.h"
      11             : #include "mozilla/dom/DOMRectBinding.h"
      12             : 
      13             : using namespace mozilla;
      14             : using namespace mozilla::dom;
      15             : 
      16           6 : NS_IMPL_CYCLE_COLLECTION_WRAPPERCACHE(DOMRectReadOnly, mParent)
      17          16 : NS_IMPL_CYCLE_COLLECTING_ADDREF(DOMRectReadOnly)
      18           8 : NS_IMPL_CYCLE_COLLECTING_RELEASE(DOMRectReadOnly)
      19          31 : NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(DOMRectReadOnly)
      20           7 :   NS_WRAPPERCACHE_INTERFACE_MAP_ENTRY
      21           0 :   NS_INTERFACE_MAP_ENTRY(nsISupports)
      22           0 : NS_INTERFACE_MAP_END
      23             : 
      24             : JSObject*
      25           0 : DOMRectReadOnly::WrapObject(JSContext* aCx, JS::Handle<JSObject*> aGivenProto)
      26             : {
      27           0 :   MOZ_ASSERT(mParent);
      28           0 :   return DOMRectReadOnlyBinding::Wrap(aCx, this, aGivenProto);
      29             : }
      30             : 
      31             : // -----------------------------------------------------------------------------
      32             : 
      33          55 : NS_IMPL_ISUPPORTS_INHERITED(DOMRect, DOMRectReadOnly, nsIDOMClientRect)
      34             : 
      35             : #define FORWARD_GETTER(_name)                                                   \
      36             :   NS_IMETHODIMP                                                                 \
      37             :   DOMRect::Get ## _name(float* aResult)                                         \
      38             :   {                                                                             \
      39             :     *aResult = float(_name());                                                  \
      40             :     return NS_OK;                                                               \
      41             :   }
      42             : 
      43           0 : FORWARD_GETTER(Left)
      44           0 : FORWARD_GETTER(Top)
      45           0 : FORWARD_GETTER(Right)
      46           0 : FORWARD_GETTER(Bottom)
      47           0 : FORWARD_GETTER(Width)
      48           0 : FORWARD_GETTER(Height)
      49             : 
      50             : JSObject*
      51           7 : DOMRect::WrapObject(JSContext* aCx, JS::Handle<JSObject*> aGivenProto)
      52             : {
      53           7 :   MOZ_ASSERT(mParent);
      54           7 :   return DOMRectBinding::Wrap(aCx, this, aGivenProto);
      55             : }
      56             : 
      57             : already_AddRefed<DOMRect>
      58           0 : DOMRect::Constructor(const GlobalObject& aGlobal, ErrorResult& aRV)
      59             : {
      60             :   RefPtr<DOMRect> obj =
      61           0 :     new DOMRect(aGlobal.GetAsSupports(), 0.0, 0.0, 0.0, 0.0);
      62           0 :   return obj.forget();
      63             : }
      64             : 
      65             : already_AddRefed<DOMRect>
      66           0 : DOMRect::Constructor(const GlobalObject& aGlobal, double aX, double aY,
      67             :                      double aWidth, double aHeight, ErrorResult& aRV)
      68             : {
      69             :   RefPtr<DOMRect> obj =
      70           0 :     new DOMRect(aGlobal.GetAsSupports(), aX, aY, aWidth, aHeight);
      71           0 :   return obj.forget();
      72             : }
      73             : 
      74             : // -----------------------------------------------------------------------------
      75             : 
      76           3 : NS_IMPL_CYCLE_COLLECTION_WRAPPERCACHE(DOMRectList, mParent, mArray)
      77             : 
      78          10 : NS_INTERFACE_TABLE_HEAD(DOMRectList)
      79          10 :   NS_WRAPPERCACHE_INTERFACE_TABLE_ENTRY
      80           9 :   NS_INTERFACE_TABLE(DOMRectList, nsIDOMClientRectList)
      81           9 :   NS_INTERFACE_TABLE_TO_MAP_SEGUE_CYCLE_COLLECTION(DOMRectList)
      82           0 : NS_INTERFACE_MAP_END
      83             : 
      84           2 : NS_IMPL_CYCLE_COLLECTING_ADDREF(DOMRectList)
      85           1 : NS_IMPL_CYCLE_COLLECTING_RELEASE(DOMRectList)
      86             : 
      87             : 
      88             : NS_IMETHODIMP
      89           0 : DOMRectList::GetLength(uint32_t* aLength)
      90             : {
      91           0 :   *aLength = Length();
      92           0 :   return NS_OK;
      93             : }
      94             : 
      95             : NS_IMETHODIMP
      96           0 : DOMRectList::Item(uint32_t aIndex, nsIDOMClientRect** aReturn)
      97             : {
      98           0 :   NS_IF_ADDREF(*aReturn = Item(aIndex));
      99           0 :   return NS_OK;
     100             : }
     101             : 
     102             : JSObject*
     103           1 : DOMRectList::WrapObject(JSContext *cx, JS::Handle<JSObject*> aGivenProto)
     104             : {
     105           1 :   return mozilla::dom::DOMRectListBinding::Wrap(cx, this, aGivenProto);
     106             : }
     107             : 
     108             : static double
     109          32 : RoundFloat(double aValue)
     110             : {
     111          32 :   return floor(aValue + 0.5);
     112             : }
     113             : 
     114             : void
     115           8 : DOMRect::SetLayoutRect(const nsRect& aLayoutRect)
     116             : {
     117           8 :   double scale = 65536.0;
     118             :   // Round to the nearest 1/scale units. We choose scale so it can be represented
     119             :   // exactly by machine floating point.
     120           8 :   double scaleInv = 1/scale;
     121           8 :   double t2pScaled = scale/nsPresContext::AppUnitsPerCSSPixel();
     122           8 :   double x = RoundFloat(aLayoutRect.x*t2pScaled)*scaleInv;
     123           8 :   double y = RoundFloat(aLayoutRect.y*t2pScaled)*scaleInv;
     124           8 :   SetRect(x, y, RoundFloat(aLayoutRect.XMost()*t2pScaled)*scaleInv - x,
     125          16 :           RoundFloat(aLayoutRect.YMost()*t2pScaled)*scaleInv - y);
     126           8 : }