зеркало из https://github.com/mozilla/gecko-dev.git
498 строки
16 KiB
C++
498 строки
16 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/. */
|
|
|
|
#include "mozilla/ServoStyleSet.h"
|
|
|
|
#include "mozilla/ServoRestyleManager.h"
|
|
#include "mozilla/dom/ChildIterator.h"
|
|
#include "nsCSSAnonBoxes.h"
|
|
#include "nsCSSPseudoElements.h"
|
|
#include "nsIDocumentInlines.h"
|
|
#include "nsPrintfCString.h"
|
|
#include "nsStyleContext.h"
|
|
#include "nsStyleSet.h"
|
|
|
|
using namespace mozilla;
|
|
using namespace mozilla::dom;
|
|
|
|
ServoStyleSet::ServoStyleSet()
|
|
: mPresContext(nullptr)
|
|
, mRawSet(Servo_StyleSet_Init())
|
|
, mBatching(0)
|
|
{
|
|
}
|
|
|
|
void
|
|
ServoStyleSet::Init(nsPresContext* aPresContext)
|
|
{
|
|
mPresContext = aPresContext;
|
|
}
|
|
|
|
void
|
|
ServoStyleSet::BeginShutdown()
|
|
{
|
|
}
|
|
|
|
void
|
|
ServoStyleSet::Shutdown()
|
|
{
|
|
mRawSet = nullptr;
|
|
}
|
|
|
|
bool
|
|
ServoStyleSet::GetAuthorStyleDisabled() const
|
|
{
|
|
return false;
|
|
}
|
|
|
|
nsresult
|
|
ServoStyleSet::SetAuthorStyleDisabled(bool aStyleDisabled)
|
|
{
|
|
MOZ_CRASH("stylo: not implemented");
|
|
}
|
|
|
|
void
|
|
ServoStyleSet::BeginUpdate()
|
|
{
|
|
++mBatching;
|
|
}
|
|
|
|
nsresult
|
|
ServoStyleSet::EndUpdate()
|
|
{
|
|
MOZ_ASSERT(mBatching > 0);
|
|
if (--mBatching > 0) {
|
|
return NS_OK;
|
|
}
|
|
|
|
// ... do something ...
|
|
return NS_OK;
|
|
}
|
|
|
|
already_AddRefed<nsStyleContext>
|
|
ServoStyleSet::ResolveStyleFor(Element* aElement,
|
|
nsStyleContext* aParentContext)
|
|
{
|
|
return GetContext(aElement, aParentContext, nullptr,
|
|
CSSPseudoElementType::NotPseudo);
|
|
}
|
|
|
|
already_AddRefed<nsStyleContext>
|
|
ServoStyleSet::GetContext(nsIContent* aContent,
|
|
nsStyleContext* aParentContext,
|
|
nsIAtom* aPseudoTag,
|
|
CSSPseudoElementType aPseudoType)
|
|
{
|
|
RefPtr<ServoComputedValues> computedValues =
|
|
Servo_ComputedValues_Get(aContent).Consume();
|
|
MOZ_ASSERT(computedValues);
|
|
return GetContext(computedValues.forget(), aParentContext, aPseudoTag, aPseudoType);
|
|
}
|
|
|
|
already_AddRefed<nsStyleContext>
|
|
ServoStyleSet::GetContext(already_AddRefed<ServoComputedValues> aComputedValues,
|
|
nsStyleContext* aParentContext,
|
|
nsIAtom* aPseudoTag,
|
|
CSSPseudoElementType aPseudoType)
|
|
{
|
|
// XXXbholley: nsStyleSet does visited handling here.
|
|
|
|
// XXXbholley: Figure out the correct thing to pass here. Does this fixup
|
|
// duplicate something that servo already does?
|
|
bool skipFixup = false;
|
|
|
|
return NS_NewStyleContext(aParentContext, mPresContext, aPseudoTag,
|
|
aPseudoType, Move(aComputedValues), skipFixup);
|
|
}
|
|
|
|
already_AddRefed<nsStyleContext>
|
|
ServoStyleSet::ResolveStyleFor(Element* aElement,
|
|
nsStyleContext* aParentContext,
|
|
TreeMatchContext& aTreeMatchContext)
|
|
{
|
|
// aTreeMatchContext is used to speed up selector matching,
|
|
// but if the element already has a ServoComputedValues computed in
|
|
// advance, then we shouldn't need to use it.
|
|
return ResolveStyleFor(aElement, aParentContext);
|
|
}
|
|
|
|
already_AddRefed<nsStyleContext>
|
|
ServoStyleSet::ResolveStyleForText(nsIContent* aTextNode,
|
|
nsStyleContext* aParentContext)
|
|
{
|
|
MOZ_ASSERT(aTextNode && aTextNode->IsNodeOfType(nsINode::eTEXT));
|
|
MOZ_ASSERT(aTextNode->GetParent());
|
|
|
|
nsIContent* parent = aTextNode->GetParent();
|
|
|
|
// If this text node is a child of a generated content node, it'll never have
|
|
// been traversed by Servo, and thus isn't styled.
|
|
//
|
|
// We inherit the style from the parent here, but also taking into account
|
|
// that only the frame of the parent has the correct style, given we take it
|
|
// from the map, and the content hasn't also being traversed from Servo.
|
|
//
|
|
// Otherwise, we rely on the fact that this text node should have been
|
|
// traversed by servo to just grab the computed values as appropriate.
|
|
//
|
|
// TODO: We might want to just do this and skip styling nodes entirely from
|
|
// Servo. This would accidentally fix the issue of having to stash
|
|
// change-hints from children in the parent element just because of inherited
|
|
// style struct changes.
|
|
RefPtr<ServoComputedValues> computedValues;
|
|
if (parent->IsGeneratedContentContainerForBefore() ||
|
|
parent->IsGeneratedContentContainerForAfter()) {
|
|
MOZ_ASSERT(aParentContext);
|
|
ServoComputedValues* parentComputedValues =
|
|
aParentContext->StyleSource().AsServoComputedValues();
|
|
computedValues =
|
|
Servo_ComputedValues_Inherit(parentComputedValues).Consume();
|
|
} else {
|
|
computedValues = Servo_ComputedValues_Get(aTextNode).Consume();
|
|
}
|
|
|
|
return GetContext(computedValues.forget(), aParentContext,
|
|
nsCSSAnonBoxes::mozText, CSSPseudoElementType::AnonBox);
|
|
}
|
|
|
|
already_AddRefed<nsStyleContext>
|
|
ServoStyleSet::ResolveStyleForOtherNonElement(nsStyleContext* aParentContext)
|
|
{
|
|
// The parent context can be null if the non-element share a style context
|
|
// with the root of an anonymous subtree.
|
|
ServoComputedValues* parent =
|
|
aParentContext ? aParentContext->StyleSource().AsServoComputedValues() : nullptr;
|
|
RefPtr<ServoComputedValues> computedValues =
|
|
Servo_ComputedValues_Inherit(parent).Consume();
|
|
MOZ_ASSERT(computedValues);
|
|
|
|
return GetContext(computedValues.forget(), aParentContext,
|
|
nsCSSAnonBoxes::mozOtherNonElement,
|
|
CSSPseudoElementType::AnonBox);
|
|
}
|
|
|
|
already_AddRefed<nsStyleContext>
|
|
ServoStyleSet::ResolvePseudoElementStyle(Element* aParentElement,
|
|
CSSPseudoElementType aType,
|
|
nsStyleContext* aParentContext,
|
|
Element* aPseudoElement)
|
|
{
|
|
if (aPseudoElement) {
|
|
NS_ERROR("stylo: We don't support CSS_PSEUDO_ELEMENT_SUPPORTS_USER_ACTION_STATE yet");
|
|
}
|
|
MOZ_ASSERT(aParentContext);
|
|
MOZ_ASSERT(aType < CSSPseudoElementType::Count);
|
|
nsIAtom* pseudoTag = nsCSSPseudoElements::GetPseudoAtom(aType);
|
|
|
|
RefPtr<ServoComputedValues> computedValues =
|
|
Servo_ComputedValues_GetForPseudoElement(
|
|
aParentContext->StyleSource().AsServoComputedValues(),
|
|
aParentElement, pseudoTag, mRawSet.get(), /* is_probe = */ false).Consume();
|
|
MOZ_ASSERT(computedValues);
|
|
|
|
return GetContext(computedValues.forget(), aParentContext, pseudoTag, aType);
|
|
}
|
|
|
|
// aFlags is an nsStyleSet flags bitfield
|
|
already_AddRefed<nsStyleContext>
|
|
ServoStyleSet::ResolveAnonymousBoxStyle(nsIAtom* aPseudoTag,
|
|
nsStyleContext* aParentContext,
|
|
uint32_t aFlags)
|
|
{
|
|
MOZ_ASSERT(nsCSSAnonBoxes::IsAnonBox(aPseudoTag));
|
|
|
|
MOZ_ASSERT(aFlags == 0 ||
|
|
aFlags == nsStyleSet::eSkipParentDisplayBasedStyleFixup);
|
|
bool skipFixup = aFlags & nsStyleSet::eSkipParentDisplayBasedStyleFixup;
|
|
|
|
ServoComputedValues* parentStyle =
|
|
aParentContext ? aParentContext->StyleSource().AsServoComputedValues()
|
|
: nullptr;
|
|
RefPtr<ServoComputedValues> computedValues =
|
|
Servo_ComputedValues_GetForAnonymousBox(parentStyle, aPseudoTag,
|
|
mRawSet.get()).Consume();
|
|
#ifdef DEBUG
|
|
if (!computedValues) {
|
|
nsString pseudo;
|
|
aPseudoTag->ToString(pseudo);
|
|
NS_ERROR(nsPrintfCString("stylo: could not get anon-box: %s",
|
|
NS_ConvertUTF16toUTF8(pseudo).get()).get());
|
|
MOZ_CRASH();
|
|
}
|
|
#endif
|
|
|
|
return NS_NewStyleContext(aParentContext, mPresContext, aPseudoTag,
|
|
CSSPseudoElementType::AnonBox,
|
|
computedValues.forget(), skipFixup);
|
|
}
|
|
|
|
// manage the set of style sheets in the style set
|
|
nsresult
|
|
ServoStyleSet::AppendStyleSheet(SheetType aType,
|
|
ServoStyleSheet* aSheet)
|
|
{
|
|
MOZ_ASSERT(aSheet);
|
|
MOZ_ASSERT(aSheet->IsApplicable());
|
|
MOZ_ASSERT(nsStyleSet::IsCSSSheetType(aType));
|
|
|
|
mSheets[aType].RemoveElement(aSheet);
|
|
mSheets[aType].AppendElement(aSheet);
|
|
|
|
// Maintain a mirrored list of sheets on the servo side.
|
|
Servo_StyleSet_AppendStyleSheet(mRawSet.get(), aSheet->RawSheet());
|
|
|
|
return NS_OK;
|
|
}
|
|
|
|
nsresult
|
|
ServoStyleSet::PrependStyleSheet(SheetType aType,
|
|
ServoStyleSheet* aSheet)
|
|
{
|
|
MOZ_ASSERT(aSheet);
|
|
MOZ_ASSERT(aSheet->IsApplicable());
|
|
MOZ_ASSERT(nsStyleSet::IsCSSSheetType(aType));
|
|
|
|
mSheets[aType].RemoveElement(aSheet);
|
|
mSheets[aType].InsertElementAt(0, aSheet);
|
|
|
|
// Maintain a mirrored list of sheets on the servo side.
|
|
Servo_StyleSet_PrependStyleSheet(mRawSet.get(), aSheet->RawSheet());
|
|
|
|
return NS_OK;
|
|
}
|
|
|
|
nsresult
|
|
ServoStyleSet::RemoveStyleSheet(SheetType aType,
|
|
ServoStyleSheet* aSheet)
|
|
{
|
|
MOZ_ASSERT(aSheet);
|
|
MOZ_ASSERT(aSheet->IsApplicable());
|
|
MOZ_ASSERT(nsStyleSet::IsCSSSheetType(aType));
|
|
|
|
mSheets[aType].RemoveElement(aSheet);
|
|
|
|
// Maintain a mirrored list of sheets on the servo side.
|
|
Servo_StyleSet_RemoveStyleSheet(mRawSet.get(), aSheet->RawSheet());
|
|
|
|
return NS_OK;
|
|
}
|
|
|
|
nsresult
|
|
ServoStyleSet::ReplaceSheets(SheetType aType,
|
|
const nsTArray<RefPtr<ServoStyleSheet>>& aNewSheets)
|
|
{
|
|
// Gecko uses a two-dimensional array keyed by sheet type, whereas Servo
|
|
// stores a flattened list. This makes ReplaceSheets a pretty clunky thing
|
|
// to express. If the need ever arises, we can easily make this more efficent,
|
|
// probably by aligning the representations better between engines.
|
|
|
|
for (ServoStyleSheet* sheet : mSheets[aType]) {
|
|
Servo_StyleSet_RemoveStyleSheet(mRawSet.get(), sheet->RawSheet());
|
|
}
|
|
|
|
mSheets[aType].Clear();
|
|
mSheets[aType].AppendElements(aNewSheets);
|
|
|
|
for (ServoStyleSheet* sheet : mSheets[aType]) {
|
|
Servo_StyleSet_AppendStyleSheet(mRawSet.get(), sheet->RawSheet());
|
|
}
|
|
|
|
return NS_OK;
|
|
}
|
|
|
|
nsresult
|
|
ServoStyleSet::InsertStyleSheetBefore(SheetType aType,
|
|
ServoStyleSheet* aNewSheet,
|
|
ServoStyleSheet* aReferenceSheet)
|
|
{
|
|
MOZ_ASSERT(aNewSheet);
|
|
MOZ_ASSERT(aReferenceSheet);
|
|
MOZ_ASSERT(aNewSheet->IsApplicable());
|
|
|
|
mSheets[aType].RemoveElement(aNewSheet);
|
|
size_t idx = mSheets[aType].IndexOf(aReferenceSheet);
|
|
if (idx == mSheets[aType].NoIndex) {
|
|
return NS_ERROR_INVALID_ARG;
|
|
}
|
|
|
|
mSheets[aType].InsertElementAt(idx, aNewSheet);
|
|
|
|
// Maintain a mirrored list of sheets on the servo side.
|
|
Servo_StyleSet_InsertStyleSheetBefore(mRawSet.get(), aNewSheet->RawSheet(),
|
|
aReferenceSheet->RawSheet());
|
|
|
|
return NS_OK;
|
|
}
|
|
|
|
int32_t
|
|
ServoStyleSet::SheetCount(SheetType aType) const
|
|
{
|
|
MOZ_ASSERT(nsStyleSet::IsCSSSheetType(aType));
|
|
return mSheets[aType].Length();
|
|
}
|
|
|
|
ServoStyleSheet*
|
|
ServoStyleSet::StyleSheetAt(SheetType aType,
|
|
int32_t aIndex) const
|
|
{
|
|
MOZ_ASSERT(nsStyleSet::IsCSSSheetType(aType));
|
|
return mSheets[aType][aIndex];
|
|
}
|
|
|
|
nsresult
|
|
ServoStyleSet::RemoveDocStyleSheet(ServoStyleSheet* aSheet)
|
|
{
|
|
return RemoveStyleSheet(SheetType::Doc, aSheet);
|
|
}
|
|
|
|
nsresult
|
|
ServoStyleSet::AddDocStyleSheet(ServoStyleSheet* aSheet,
|
|
nsIDocument* aDocument)
|
|
{
|
|
StyleSheetHandle::RefPtr strong(aSheet);
|
|
|
|
mSheets[SheetType::Doc].RemoveElement(aSheet);
|
|
|
|
size_t index =
|
|
aDocument->FindDocStyleSheetInsertionPoint(mSheets[SheetType::Doc], aSheet);
|
|
mSheets[SheetType::Doc].InsertElementAt(index, aSheet);
|
|
|
|
// Maintain a mirrored list of sheets on the servo side.
|
|
ServoStyleSheet* followingSheet =
|
|
mSheets[SheetType::Doc].SafeElementAt(index + 1);
|
|
if (followingSheet) {
|
|
Servo_StyleSet_InsertStyleSheetBefore(mRawSet.get(), aSheet->RawSheet(),
|
|
followingSheet->RawSheet());
|
|
} else {
|
|
Servo_StyleSet_AppendStyleSheet(mRawSet.get(), aSheet->RawSheet());
|
|
}
|
|
|
|
return NS_OK;
|
|
}
|
|
|
|
already_AddRefed<nsStyleContext>
|
|
ServoStyleSet::ProbePseudoElementStyle(Element* aParentElement,
|
|
CSSPseudoElementType aType,
|
|
nsStyleContext* aParentContext)
|
|
{
|
|
MOZ_ASSERT(aParentContext);
|
|
MOZ_ASSERT(aType < CSSPseudoElementType::Count);
|
|
nsIAtom* pseudoTag = nsCSSPseudoElements::GetPseudoAtom(aType);
|
|
|
|
RefPtr<ServoComputedValues> computedValues =
|
|
Servo_ComputedValues_GetForPseudoElement(
|
|
aParentContext->StyleSource().AsServoComputedValues(),
|
|
aParentElement, pseudoTag, mRawSet.get(), /* is_probe = */ true).Consume();
|
|
|
|
if (!computedValues) {
|
|
return nullptr;
|
|
}
|
|
|
|
// For :before and :after pseudo-elements, having display: none or no
|
|
// 'content' property is equivalent to not having the pseudo-element
|
|
// at all.
|
|
if (computedValues &&
|
|
(pseudoTag == nsCSSPseudoElements::before ||
|
|
pseudoTag == nsCSSPseudoElements::after)) {
|
|
const nsStyleDisplay *display = Servo_GetStyleDisplay(computedValues);
|
|
const nsStyleContent *content = Servo_GetStyleContent(computedValues);
|
|
// XXXldb What is contentCount for |content: ""|?
|
|
if (display->mDisplay == StyleDisplay::None_ ||
|
|
content->ContentCount() == 0) {
|
|
return nullptr;
|
|
}
|
|
}
|
|
|
|
return GetContext(computedValues.forget(), aParentContext, pseudoTag, aType);
|
|
}
|
|
|
|
already_AddRefed<nsStyleContext>
|
|
ServoStyleSet::ProbePseudoElementStyle(Element* aParentElement,
|
|
CSSPseudoElementType aType,
|
|
nsStyleContext* aParentContext,
|
|
TreeMatchContext& aTreeMatchContext,
|
|
Element* aPseudoElement)
|
|
{
|
|
if (aPseudoElement) {
|
|
NS_ERROR("stylo: We don't support CSS_PSEUDO_ELEMENT_SUPPORTS_USER_ACTION_STATE yet");
|
|
}
|
|
return ProbePseudoElementStyle(aParentElement, aType, aParentContext);
|
|
}
|
|
|
|
nsRestyleHint
|
|
ServoStyleSet::HasStateDependentStyle(dom::Element* aElement,
|
|
EventStates aStateMask)
|
|
{
|
|
NS_WARNING("stylo: HasStateDependentStyle always returns zero!");
|
|
return nsRestyleHint(0);
|
|
}
|
|
|
|
nsRestyleHint
|
|
ServoStyleSet::HasStateDependentStyle(dom::Element* aElement,
|
|
CSSPseudoElementType aPseudoType,
|
|
dom::Element* aPseudoElement,
|
|
EventStates aStateMask)
|
|
{
|
|
NS_WARNING("stylo: HasStateDependentStyle always returns zero!");
|
|
return nsRestyleHint(0);
|
|
}
|
|
|
|
nsRestyleHint
|
|
ServoStyleSet::ComputeRestyleHint(dom::Element* aElement,
|
|
ServoElementSnapshot* aSnapshot)
|
|
{
|
|
return Servo_ComputeRestyleHint(aElement, aSnapshot, mRawSet.get());
|
|
}
|
|
|
|
static void
|
|
ClearDirtyBits(nsIContent* aContent)
|
|
{
|
|
bool traverseDescendants = aContent->HasDirtyDescendantsForServo();
|
|
aContent->UnsetIsDirtyAndHasDirtyDescendantsForServo();
|
|
if (!traverseDescendants) {
|
|
return;
|
|
}
|
|
|
|
StyleChildrenIterator it(aContent);
|
|
for (nsIContent* n = it.GetNextChild(); n; n = it.GetNextChild()) {
|
|
ClearDirtyBits(n);
|
|
}
|
|
}
|
|
|
|
void
|
|
ServoStyleSet::StyleDocument(bool aLeaveDirtyBits)
|
|
{
|
|
// Grab the root.
|
|
nsIDocument* doc = mPresContext->Document();
|
|
nsIContent* root = doc->GetRootElement();
|
|
MOZ_ASSERT(root);
|
|
|
|
// Restyle the document, clearing the dirty bits if requested.
|
|
Servo_RestyleSubtree(root, mRawSet.get());
|
|
if (!aLeaveDirtyBits) {
|
|
ClearDirtyBits(root);
|
|
doc->UnsetHasDirtyDescendantsForServo();
|
|
}
|
|
}
|
|
|
|
void
|
|
ServoStyleSet::StyleNewSubtree(nsIContent* aContent)
|
|
{
|
|
MOZ_ASSERT(aContent->IsDirtyForServo());
|
|
if (aContent->IsElement() || aContent->IsNodeOfType(nsINode::eTEXT)) {
|
|
Servo_RestyleSubtree(aContent, mRawSet.get());
|
|
}
|
|
ClearDirtyBits(aContent);
|
|
}
|
|
|
|
void
|
|
ServoStyleSet::StyleNewChildren(nsIContent* aParent)
|
|
{
|
|
MOZ_ASSERT(aParent->HasDirtyDescendantsForServo());
|
|
Servo_RestyleSubtree(aParent, mRawSet.get());
|
|
ClearDirtyBits(aParent);
|
|
}
|