dom/events/ScrollAreaEvent.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 "base/basictypes.h"
   8 #include "ipc/IPCMessageUtils.h"
   9 #include "ipc/IPCMessageUtilsSpecializations.h"
  10 #include "mozilla/dom/DOMRect.h"
  11 #include "mozilla/dom/ScrollAreaEvent.h"
  12 #include "mozilla/ContentEvents.h"
  13
  14 namespace mozilla::dom {
  15
  16 ScrollAreaEvent::ScrollAreaEvent(EventTarget* aOwner,
  17                                  nsPresContext* aPresContext,
  18                                  InternalScrollAreaEvent* aEvent)
  19     : UIEvent(aOwner, aPresContext, aEvent), mClientArea(new DOMRect(nullptr)) {
  20   mClientArea->SetLayoutRect(aEvent ? aEvent->mArea : nsRect());
  21 }
  22
  23 NS_IMPL_CYCLE_COLLECTION_INHERITED(ScrollAreaEvent, UIEvent, mClientArea)
  24
  25 NS_IMPL_ADDREF_INHERITED(ScrollAreaEvent, UIEvent)
  26 NS_IMPL_RELEASE_INHERITED(ScrollAreaEvent, UIEvent)
  27
  28 NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(ScrollAreaEvent)
  29 NS_INTERFACE_MAP_END_INHERITING(UIEvent)
  30
  31 void ScrollAreaEvent::InitScrollAreaEvent(const nsAString& aEventType,
  32                                           bool aCanBubble, bool aCancelable,
  33                                           nsGlobalWindowInner* aView,
  34                                           int32_t aDetail, float aX, float aY,
  35                                           float aWidth, float aHeight) {
  36   NS_ENSURE_TRUE_VOID(!mEvent->mFlags.mIsBeingDispatched);
  37
  38   UIEvent::InitUIEvent(aEventType, aCanBubble, aCancelable, aView, aDetail);
  39   mClientArea->SetRect(aX, aY, aWidth, aHeight);
  40 }
  41
  42 void ScrollAreaEvent::Serialize(IPC::MessageWriter* aWriter,
  43                                 bool aSerializeInterfaceType) {
  44   if (aSerializeInterfaceType) {
  45     IPC::WriteParam(aWriter, u"scrollareaevent"_ns);
  46   }
  47
  48   Event::Serialize(aWriter, false);
  49
  50   IPC::WriteParam(aWriter, X());
  51   IPC::WriteParam(aWriter, Y());
  52   IPC::WriteParam(aWriter, Width());
  53   IPC::WriteParam(aWriter, Height());
  54 }
  55
  56 bool ScrollAreaEvent::Deserialize(IPC::MessageReader* aReader) {
  57   NS_ENSURE_TRUE(Event::Deserialize(aReader), false);
  58
  59   float x, y, width, height;
  60   NS_ENSURE_TRUE(IPC::ReadParam(aReader, &x), false);
  61   NS_ENSURE_TRUE(IPC::ReadParam(aReader, &y), false);
  62   NS_ENSURE_TRUE(IPC::ReadParam(aReader, &width), false);
  63   NS_ENSURE_TRUE(IPC::ReadParam(aReader, &height), false);
  64   mClientArea->SetRect(x, y, width, height);
  65
  66   return true;
  67 }
  68
  69 }  // namespace mozilla::dom
  70
  71 using namespace mozilla;
  72 using namespace mozilla::dom;
  73
  74 already_AddRefed<ScrollAreaEvent> NS_NewDOMScrollAreaEvent(
  75     EventTarget* aOwner, nsPresContext* aPresContext,
  76     InternalScrollAreaEvent* aEvent) {
  77   RefPtr<ScrollAreaEvent> ev =
  78       new ScrollAreaEvent(aOwner, aPresContext, aEvent);
  79   return ev.forget();
  80 }