dom/base/DocumentInlines.h

   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 #ifndef mozilla_dom_DocumentInlines_h
   7 #define mozilla_dom_DocumentInlines_h
   8
   9 #include "mozilla/dom/Document.h"
  10
  11 #include "mozilla/PresShell.h"
  12 #include "mozilla/ServoStyleSet.h"
  13 #include "mozilla/dom/HTMLBodyElement.h"
  14 #include "nsContentUtils.h"
  15 #include "nsPresContext.h"
  16 #include "nsStyleSheetService.h"
  17
  18 namespace mozilla::dom {
  19
  20 inline PresShell* Document::GetObservingPresShell() const {
  21   return mPresShell && mPresShell->IsObservingDocument() ? mPresShell : nullptr;
  22 }
  23
  24 inline nsPresContext* Document::GetPresContext() const {
  25   PresShell* presShell = GetPresShell();
  26   return presShell ? presShell->GetPresContext() : nullptr;
  27 }
  28
  29 inline HTMLBodyElement* Document::GetBodyElement() {
  30   return static_cast<HTMLBodyElement*>(GetHtmlChildElement(nsGkAtoms::body));
  31 }
  32
  33 inline void Document::SetServoRestyleRoot(nsINode* aRoot, uint32_t aDirtyBits) {
  34   MOZ_ASSERT(aRoot);
  35
  36   MOZ_ASSERT(!mServoRestyleRoot || mServoRestyleRoot == aRoot ||
  37              nsContentUtils::ContentIsFlattenedTreeDescendantOfForStyle(
  38                  mServoRestyleRoot, aRoot));
  39   MOZ_ASSERT(aRoot == aRoot->OwnerDocAsNode() || aRoot->IsElement());
  40   mServoRestyleRoot = aRoot;
  41   SetServoRestyleRootDirtyBits(aDirtyBits);
  42 }
  43
  44 // Note: we break this out of SetServoRestyleRoot so that callers can add
  45 // bits without doing a no-op assignment to the restyle root, which would
  46 // involve cycle-collected refcount traffic.
  47 inline void Document::SetServoRestyleRootDirtyBits(uint32_t aDirtyBits) {
  48   MOZ_ASSERT(aDirtyBits);
  49   MOZ_ASSERT((aDirtyBits & ~Element::kAllServoDescendantBits) == 0);
  50   MOZ_ASSERT((aDirtyBits & mServoRestyleRootDirtyBits) ==
  51              mServoRestyleRootDirtyBits);
  52   MOZ_ASSERT(mServoRestyleRoot);
  53   mServoRestyleRootDirtyBits = aDirtyBits;
  54 }
  55
  56 inline ServoStyleSet& Document::EnsureStyleSet() const {
  57   MOZ_ASSERT(NS_IsMainThread());
  58   if (!mStyleSet) {
  59     Document* doc = const_cast<Document*>(this);
  60     doc->mStyleSet = MakeUnique<ServoStyleSet>(*doc);
  61   }
  62   return *(mStyleSet.get());
  63 }
  64
  65 }  // namespace mozilla::dom
  66
  67 #endif  // mozilla_dom_DocumentInlines_h