dom/events/ScrollAreaEvent.cpp

   1 /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
   2 /* This Source Code Form is subject to the terms of the Mozilla Public
   3  * License, v. 2.0. If a copy of the MPL was not distributed with this
   4  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
   5
   6 #include "base/basictypes.h"
   7 #include "ipc/IPCMessageUtils.h"
   8 #include "mozilla/dom/DOMRect.h"
   9 #include "mozilla/dom/ScrollAreaEvent.h"
  10 #include "mozilla/ContentEvents.h"
  11
  12 namespace mozilla {
  13 namespace dom {
  14
  15 ScrollAreaEvent::ScrollAreaEvent(EventTarget* aOwner,
  16                                  nsPresContext* aPresContext,
  17                                  InternalScrollAreaEvent* aEvent)
  18   : UIEvent(aOwner, aPresContext, aEvent)
  19   , mClientArea(nullptr)
  20 {
  21   mClientArea.SetLayoutRect(aEvent ? aEvent->mArea : nsRect());
  22 }
  23
  24 NS_IMPL_ADDREF_INHERITED(ScrollAreaEvent, UIEvent)
  25 NS_IMPL_RELEASE_INHERITED(ScrollAreaEvent, UIEvent)
  26
  27 NS_INTERFACE_MAP_BEGIN(ScrollAreaEvent)
  28   NS_INTERFACE_MAP_ENTRY(nsIDOMScrollAreaEvent)
  29 NS_INTERFACE_MAP_END_INHERITING(UIEvent)
  30
  31
  32 #define FORWARD_GETTER(_name)                                                  \
  33   NS_IMETHODIMP                                                                \
  34   ScrollAreaEvent::Get ## _name(float* aResult)                                \
  35   {                                                                            \
  36     *aResult = _name();                                                        \
  37     return NS_OK;                                                              \
  38   }
  39
  40 FORWARD_GETTER(X)
  41 FORWARD_GETTER(Y)
  42 FORWARD_GETTER(Width)
  43 FORWARD_GETTER(Height)
  44
  45 NS_IMETHODIMP
  46 ScrollAreaEvent::InitScrollAreaEvent(const nsAString& aEventType,
  47                                      bool aCanBubble,
  48                                      bool aCancelable,
  49                                      nsIDOMWindow* aView,
  50                                      int32_t aDetail,
  51                                      float aX,
  52                                      float aY,
  53                                      float aWidth,
  54                                      float aHeight)
  55 {
  56   nsresult rv =
  57     UIEvent::InitUIEvent(aEventType, aCanBubble, aCancelable, aView, aDetail);
  58   NS_ENSURE_SUCCESS(rv, rv);
  59
  60   mClientArea.SetRect(aX, aY, aWidth, aHeight);
  61
  62   return NS_OK;
  63 }
  64
  65 NS_IMETHODIMP_(void)
  66 ScrollAreaEvent::Serialize(IPC::Message* aMsg,
  67                            bool aSerializeInterfaceType)
  68 {
  69   if (aSerializeInterfaceType) {
  70     IPC::WriteParam(aMsg, NS_LITERAL_STRING("scrollareaevent"));
  71   }
  72
  73   Event::Serialize(aMsg, false);
  74
  75   IPC::WriteParam(aMsg, X());
  76   IPC::WriteParam(aMsg, Y());
  77   IPC::WriteParam(aMsg, Width());
  78   IPC::WriteParam(aMsg, Height());
  79 }
  80
  81 NS_IMETHODIMP_(bool)
  82 ScrollAreaEvent::Deserialize(const IPC::Message* aMsg, void** aIter)
  83 {
  84   NS_ENSURE_TRUE(Event::Deserialize(aMsg, aIter), false);
  85
  86   float x, y, width, height;
  87   NS_ENSURE_TRUE(IPC::ReadParam(aMsg, aIter, &x), false);
  88   NS_ENSURE_TRUE(IPC::ReadParam(aMsg, aIter, &y), false);
  89   NS_ENSURE_TRUE(IPC::ReadParam(aMsg, aIter, &width), false);
  90   NS_ENSURE_TRUE(IPC::ReadParam(aMsg, aIter, &height), false);
  91   mClientArea.SetRect(x, y, width, height);
  92
  93   return true;
  94 }
  95
  96 } // namespace dom
  97 } // namespace mozilla
  98
  99 using namespace mozilla;
 100 using namespace mozilla::dom;
 101
 102 nsresult
 103 NS_NewDOMScrollAreaEvent(nsIDOMEvent** aInstancePtrResult,
 104                          EventTarget* aOwner,
 105                          nsPresContext* aPresContext,
 106                          InternalScrollAreaEvent* aEvent)
 107 {
 108   ScrollAreaEvent* ev = new ScrollAreaEvent(aOwner, aPresContext, aEvent);
 109   return CallQueryInterface(ev, aInstancePtrResult);
 110 }