dom/events/NotifyPaintEvent.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 "mozilla/dom/DOMRect.h"
  10 #include "mozilla/dom/NotifyPaintEvent.h"
  11 #include "mozilla/dom/PaintRequest.h"
  12 #include "mozilla/GfxMessageUtils.h"
  13 #include "nsContentUtils.h"
  14
  15 namespace mozilla::dom {
  16
  17 NotifyPaintEvent::NotifyPaintEvent(
  18     EventTarget* aOwner, nsPresContext* aPresContext, WidgetEvent* aEvent,
  19     EventMessage aEventMessage, nsTArray<nsRect>* aInvalidateRequests,
  20     uint64_t aTransactionId, DOMHighResTimeStamp aTimeStamp)
  21     : Event(aOwner, aPresContext, aEvent) {
  22   if (mEvent) {
  23     mEvent->mMessage = aEventMessage;
  24   }
  25   if (aInvalidateRequests) {
  26     mInvalidateRequests.SwapElements(*aInvalidateRequests);
  27   }
  28
  29   mTransactionId = aTransactionId;
  30   mTimeStamp = aTimeStamp;
  31 }
  32
  33 nsRegion NotifyPaintEvent::GetRegion(SystemCallerGuarantee) {
  34   nsRegion r;
  35   for (uint32_t i = 0; i < mInvalidateRequests.Length(); ++i) {
  36     r.Or(r, mInvalidateRequests[i]);
  37     r.SimplifyOutward(10);
  38   }
  39   return r;
  40 }
  41
  42 already_AddRefed<DOMRect> NotifyPaintEvent::BoundingClientRect(
  43     SystemCallerGuarantee aGuarantee) {
  44   RefPtr<DOMRect> rect = new DOMRect(ToSupports(this));
  45
  46   if (mPresContext) {
  47     rect->SetLayoutRect(GetRegion(aGuarantee).GetBounds());
  48   }
  49
  50   return rect.forget();
  51 }
  52
  53 already_AddRefed<DOMRectList> NotifyPaintEvent::ClientRects(
  54     SystemCallerGuarantee aGuarantee) {
  55   nsISupports* parent = ToSupports(this);
  56   RefPtr<DOMRectList> rectList = new DOMRectList(parent);
  57
  58   nsRegion r = GetRegion(aGuarantee);
  59   for (auto iter = r.RectIter(); !iter.Done(); iter.Next()) {
  60     RefPtr<DOMRect> rect = new DOMRect(parent);
  61     rect->SetLayoutRect(iter.Get());
  62     rectList->Append(rect);
  63   }
  64
  65   return rectList.forget();
  66 }
  67
  68 already_AddRefed<PaintRequestList> NotifyPaintEvent::PaintRequests(
  69     SystemCallerGuarantee) {
  70   Event* parent = this;
  71   RefPtr<PaintRequestList> requests = new PaintRequestList(parent);
  72
  73   for (uint32_t i = 0; i < mInvalidateRequests.Length(); ++i) {
  74     RefPtr<PaintRequest> r = new PaintRequest(parent);
  75     r->SetRequest(mInvalidateRequests[i]);
  76     requests->Append(r);
  77   }
  78
  79   return requests.forget();
  80 }
  81
  82 void NotifyPaintEvent::Serialize(IPC::MessageWriter* aWriter,
  83                                  bool aSerializeInterfaceType) {
  84   if (aSerializeInterfaceType) {
  85     IPC::WriteParam(aWriter, u"notifypaintevent"_ns);
  86   }
  87
  88   Event::Serialize(aWriter, false);
  89
  90   uint32_t length = mInvalidateRequests.Length();
  91   IPC::WriteParam(aWriter, length);
  92   for (uint32_t i = 0; i < length; ++i) {
  93     IPC::WriteParam(aWriter, mInvalidateRequests[i]);
  94   }
  95 }
  96
  97 bool NotifyPaintEvent::Deserialize(IPC::MessageReader* aReader) {
  98   NS_ENSURE_TRUE(Event::Deserialize(aReader), false);
  99
 100   uint32_t length = 0;
 101   NS_ENSURE_TRUE(IPC::ReadParam(aReader, &length), false);
 102   mInvalidateRequests.SetCapacity(length);
 103   for (uint32_t i = 0; i < length; ++i) {
 104     nsRect req;
 105     NS_ENSURE_TRUE(IPC::ReadParam(aReader, &req), false);
 106     mInvalidateRequests.AppendElement(req);
 107   }
 108
 109   return true;
 110 }
 111
 112 uint64_t NotifyPaintEvent::TransactionId(SystemCallerGuarantee) {
 113   return mTransactionId;
 114 }
 115
 116 DOMHighResTimeStamp NotifyPaintEvent::PaintTimeStamp(SystemCallerGuarantee) {
 117   return mTimeStamp;
 118 }
 119
 120 }  // namespace mozilla::dom
 121
 122 using namespace mozilla;
 123 using namespace mozilla::dom;
 124
 125 already_AddRefed<NotifyPaintEvent> NS_NewDOMNotifyPaintEvent(
 126     EventTarget* aOwner, nsPresContext* aPresContext, WidgetEvent* aEvent,
 127     EventMessage aEventMessage, nsTArray<nsRect>* aInvalidateRequests,
 128     uint64_t aTransactionId, DOMHighResTimeStamp aTimeStamp) {
 129   RefPtr<NotifyPaintEvent> it =
 130       new NotifyPaintEvent(aOwner, aPresContext, aEvent, aEventMessage,
 131                            aInvalidateRequests, aTransactionId, aTimeStamp);
 132   return it.forget();
 133 }