gecko-dev/dom/base/nsIDocumentInlines.h
Emilio Cobos Álvarez b5ab9820ca Bug 1403712: Make some assertions not assert for conditions that may happen mid-unbind. r=bholley
MozReview-Commit-ID: DNSphdMismy
Signed-off-by: Emilio Cobos Álvarez <emilio@crisal.io>
2017-09-28 22:24:08 +02:00

97 lines
3.5 KiB
C++

/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#ifndef nsIDocumentInlines_h
#define nsIDocumentInlines_h
#include "nsContentUtils.h"
#include "nsIDocument.h"
#include "mozilla/dom/HTMLBodyElement.h"
#include "nsStyleSheetService.h"
inline mozilla::dom::HTMLBodyElement*
nsIDocument::GetBodyElement()
{
return static_cast<mozilla::dom::HTMLBodyElement*>(GetHtmlChildElement(nsGkAtoms::body));
}
template<typename T>
size_t
nsIDocument::FindDocStyleSheetInsertionPoint(
const nsTArray<T>& aDocSheets,
mozilla::StyleSheet* aSheet)
{
nsStyleSheetService* sheetService = nsStyleSheetService::GetInstance();
// lowest index first
int32_t newDocIndex = GetIndexOfStyleSheet(aSheet);
int32_t count = aDocSheets.Length();
int32_t index;
for (index = 0; index < count; index++) {
mozilla::StyleSheet* sheet = static_cast<mozilla::StyleSheet*>(
aDocSheets[index]);
int32_t sheetDocIndex = GetIndexOfStyleSheet(sheet);
if (sheetDocIndex > newDocIndex)
break;
// If the sheet is not owned by the document it can be an author
// sheet registered at nsStyleSheetService or an additional author
// sheet on the document, which means the new
// doc sheet should end up before it.
if (sheetDocIndex < 0) {
if (sheetService) {
auto& authorSheets =
*sheetService->AuthorStyleSheets(GetStyleBackendType());
if (authorSheets.IndexOf(sheet) != authorSheets.NoIndex) {
break;
}
}
if (sheet == GetFirstAdditionalAuthorSheet()) {
break;
}
}
}
return size_t(index);
}
inline void
nsIDocument::SetServoRestyleRoot(nsINode* aRoot, uint32_t aDirtyBits)
{
MOZ_ASSERT(aRoot);
MOZ_ASSERT(aDirtyBits);
MOZ_ASSERT((aDirtyBits & ~Element::kAllServoDescendantBits) == 0);
MOZ_ASSERT((aDirtyBits & mServoRestyleRootDirtyBits) == mServoRestyleRootDirtyBits);
// NOTE(emilio): The !aRoot->IsElement() check allows us to handle cases where
// we change the restyle root during unbinding of a subtree where the root is
// not unbound yet (and thus hasn't cleared the restyle root yet).
//
// In that case the tree can be in a somewhat inconsistent state (with the
// document no longer being the subtree root of the current root, but the root
// not having being unbound first).
//
// In that case, given there's no common ancestor, aRoot should be the
// document, and we allow that, provided that the previous root will
// eventually be unbound and the dirty bits will be cleared.
//
// If we want to enforce calling into this method with the tree in a
// consistent state, we'd need to move all the state changes that happen on
// content unbinding for parents, like fieldset validity stuff and ancestor
// direction changes off script runners or, alternatively, nulling out the
// document and parent node _after_ nulling out the children's, and then
// remove that line.
MOZ_ASSERT(!mServoRestyleRoot ||
mServoRestyleRoot == aRoot ||
!aRoot->IsElement() ||
nsContentUtils::ContentIsFlattenedTreeDescendantOfForStyle(mServoRestyleRoot, aRoot));
MOZ_ASSERT(aRoot == aRoot->OwnerDocAsNode() || aRoot->IsElement());
mServoRestyleRoot = aRoot;
mServoRestyleRootDirtyBits = aDirtyBits;
}
#endif // nsIDocumentInlines_h