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b5d6ad43a2
In bug 1844755, a bunch of the time is spent allocating initial values. There used to be more document-dependent initial values before bug 1834487, but now that's only about default-font and direction. This improves the situation by sharing initial structs that don't depend on the document. Differential Revision: https://phabricator.services.mozilla.com/D184256
133 lines
4.2 KiB
C++
133 lines
4.2 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=8 sts=2 et sw=2 tw=80: */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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/*
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* Inlined methods for ComputedStyle. Will just redirect to
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* GeckoComputedStyle methods when compiled without stylo, but will do
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* virtual dispatch (by checking which kind of container it is)
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* in stylo mode.
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*/
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#ifndef ComputedStyleInlines_h
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#define ComputedStyleInlines_h
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#include "mozilla/ComputedStyle.h"
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#include "MainThreadUtils.h"
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#include "mozilla/Assertions.h"
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#include "mozilla/Unused.h"
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#include "nsStyleStructInlines.h"
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namespace mozilla {
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namespace detail {
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template <typename T, typename Enable = void>
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struct HasTriggerImageLoads : public std::false_type {};
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template <typename T>
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struct HasTriggerImageLoads<T, decltype(std::declval<T&>().TriggerImageLoads(
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std::declval<dom::Document&>(), nullptr))>
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: public std::true_type {};
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template <typename T, const T* (ComputedStyle::*Method)() const>
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void TriggerImageLoads(dom::Document& aDocument, const ComputedStyle* aOldStyle,
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ComputedStyle* aStyle) {
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if constexpr (HasTriggerImageLoads<T>::value) {
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auto* old = aOldStyle ? (aOldStyle->*Method)() : nullptr;
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auto* current = const_cast<T*>((aStyle->*Method)());
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current->TriggerImageLoads(aDocument, old);
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} else {
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Unused << aOldStyle;
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Unused << aStyle;
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}
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}
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} // namespace detail
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void ComputedStyle::StartImageLoads(dom::Document& aDocument,
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const ComputedStyle* aOldStyle) {
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MOZ_ASSERT(NS_IsMainThread());
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#define STYLE_STRUCT(name_) \
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detail::TriggerImageLoads<nsStyle##name_, &ComputedStyle::Style##name_>( \
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aDocument, aOldStyle, this);
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#include "nsStyleStructList.h"
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#undef STYLE_STRUCT
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}
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StylePointerEvents ComputedStyle::PointerEvents() const {
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if (IsRootElementStyle()) {
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// The root frame is not allowed to have pointer-events: none, or else no
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// frames could be hit test against and scrolling the viewport would not
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// work.
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return StylePointerEvents::Auto;
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}
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const auto& ui = *StyleUI();
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if (ui.IsInert()) {
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return StylePointerEvents::None;
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}
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return ui.ComputedPointerEvents();
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}
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StyleUserSelect ComputedStyle::UserSelect() const {
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return StyleUI()->IsInert() ? StyleUserSelect::None
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: StyleUIReset()->ComputedUserSelect();
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}
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bool ComputedStyle::IsFixedPosContainingBlockForNonSVGTextFrames() const {
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// NOTE: Any CSS properties that influence the output of this function
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// should return FIXPOS_CB_NON_SVG for will-change.
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if (IsRootElementStyle()) {
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return false;
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}
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const auto& disp = *StyleDisplay();
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if (disp.mWillChange.bits & mozilla::StyleWillChangeBits::FIXPOS_CB_NON_SVG) {
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return true;
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}
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const auto& effects = *StyleEffects();
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return effects.HasFilters() || effects.HasBackdropFilters();
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}
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bool ComputedStyle::IsFixedPosContainingBlock(
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const nsIFrame* aContextFrame) const {
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// NOTE: Any CSS properties that influence the output of this function
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// should also handle will-change appropriately.
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if (aContextFrame->IsInSVGTextSubtree()) {
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return false;
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}
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if (IsFixedPosContainingBlockForNonSVGTextFrames()) {
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return true;
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}
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const auto& disp = *StyleDisplay();
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if (disp.IsFixedPosContainingBlockForContainLayoutAndPaintSupportingFrames() &&
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aContextFrame->IsFrameOfType(nsIFrame::eSupportsContainLayoutAndPaint)) {
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return true;
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}
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if (disp.IsFixedPosContainingBlockForTransformSupportingFrames() &&
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aContextFrame->IsFrameOfType(nsIFrame::eSupportsCSSTransforms)) {
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return true;
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}
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return false;
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}
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bool ComputedStyle::IsAbsPosContainingBlock(
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const nsIFrame* aContextFrame) const {
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if (IsFixedPosContainingBlock(aContextFrame)) {
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return true;
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}
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// NOTE: Any CSS properties that influence the output of this function
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// should also handle will-change appropriately.
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return StyleDisplay()->IsPositionedStyle() &&
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!aContextFrame->IsInSVGTextSubtree();
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}
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} // namespace mozilla
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#endif // ComputedStyleInlines_h
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