зеркало из https://github.com/mozilla/gecko-dev.git
220 строки
10 KiB
C++
220 строки
10 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 nsStyleContext. Will just redirect to
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* GeckoStyleContext 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 nsStyleContextInlines_h
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#define nsStyleContextInlines_h
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#include "nsStyleContext.h"
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#include "mozilla/ServoStyleContext.h"
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#include "mozilla/GeckoStyleContext.h"
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#include "mozilla/ServoUtils.h"
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#include "mozilla/ServoBindings.h"
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MOZ_DEFINE_STYLO_METHODS(nsStyleContext,
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mozilla::GeckoStyleContext,
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mozilla::ServoStyleContext);
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nsRuleNode*
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nsStyleContext::RuleNode()
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{
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MOZ_RELEASE_ASSERT(IsGecko());
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return AsGecko()->RuleNode();
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}
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const ServoComputedData*
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nsStyleContext::ComputedData()
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{
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MOZ_RELEASE_ASSERT(IsServo());
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return AsServo()->ComputedData();
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}
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void
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nsStyleContext::AddRef()
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{
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MOZ_STYLO_FORWARD(AddRef, ())
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}
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void
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nsStyleContext::Release()
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{
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MOZ_STYLO_FORWARD(Release, ())
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}
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#define STYLE_STRUCT(name_, checkdata_cb_) \
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const nsStyle##name_ * \
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nsStyleContext::Style##name_() { \
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return DoGetStyle##name_<true>(); \
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} \
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const nsStyle##name_ * \
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nsStyleContext::ThreadsafeStyle##name_() { \
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if (mozilla::ServoStyleSet::IsInServoTraversal()) { \
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return AsServo()->ComputedData()->GetStyle##name_(); \
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} \
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return Style##name_(); \
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} \
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const nsStyle##name_ * nsStyleContext::PeekStyle##name_() { \
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return DoGetStyle##name_<false>(); \
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}
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#include "nsStyleStructList.h"
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#undef STYLE_STRUCT
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// Helper functions for GetStyle* and PeekStyle*
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#define STYLE_STRUCT_INHERITED(name_, checkdata_cb_) \
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template<bool aComputeData> \
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const nsStyle##name_ * nsStyleContext::DoGetStyle##name_() { \
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if (auto gecko = GetAsGecko()) { \
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const nsStyle##name_ * cachedData = \
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static_cast<nsStyle##name_*>( \
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gecko->mCachedInheritedData \
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.mStyleStructs[eStyleStruct_##name_]); \
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if (cachedData) /* Have it cached already, yay */ \
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return cachedData; \
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if (!aComputeData) { \
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/* We always cache inherited structs on the context when we */\
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/* compute them. */ \
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return nullptr; \
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} \
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/* Have the rulenode deal */ \
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AUTO_CHECK_DEPENDENCY(gecko, eStyleStruct_##name_); \
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const nsStyle##name_ * newData = \
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gecko->RuleNode()-> \
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GetStyle##name_<aComputeData>(gecko, mBits); \
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/* always cache inherited data on the style context; the rule */\
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/* node set the bit in mBits for us if needed. */ \
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gecko->mCachedInheritedData \
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.mStyleStructs[eStyleStruct_##name_] = \
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const_cast<nsStyle##name_ *>(newData); \
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return newData; \
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} \
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auto servo = AsServo(); \
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/** \
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* Also (conservatively) set the owning bit in the parent style \
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* context if we're a text node. \
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* \
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* This causes the parent element's style context to cache any \
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* inherited structs we request for a text node, which means we \
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* don't have to compute change hints for the text node, as \
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* handling the change on the parent element is sufficient. \
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* \
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* Note, however, that we still need to request the style struct \
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* of the text node itself, since we may run some fixups on it, \
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* like for text-combine. \
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* \
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* This model is sound because for the fixed-up values to change, \
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* other properties on the parent need to change too, and we'll \
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* handle those change hints correctly. \
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* \
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* TODO(emilio): Perhaps we should remove those fixups and handle \
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* those in layout instead. Those fixups are kind of expensive \
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* for style sharing, and computed style of text nodes is not \
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* observable. If we do that, we could assert here that the \
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* inherited structs of both are the same. \
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*/ \
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if (mPseudoTag == nsCSSAnonBoxes::mozText && aComputeData) { \
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MOZ_ASSERT(mParent); \
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mParent->AddStyleBit(NS_STYLE_INHERIT_BIT(name_)); \
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} \
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\
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const bool needToCompute = !(mBits & NS_STYLE_INHERIT_BIT(name_));\
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if (!aComputeData && needToCompute) { \
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return nullptr; \
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} \
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\
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const nsStyle##name_* data = \
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servo->ComputedData()->GetStyle##name_(); \
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/* perform any remaining main thread work on the struct */ \
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if (needToCompute) { \
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MOZ_ASSERT(NS_IsMainThread()); \
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MOZ_ASSERT(!mozilla::ServoStyleSet::IsInServoTraversal()); \
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const_cast<nsStyle##name_*>(data)->FinishStyle(PresContext()); \
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/* the ServoStyleContext owns the struct */ \
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AddStyleBit(NS_STYLE_INHERIT_BIT(name_)); \
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} \
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return data; \
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}
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#define STYLE_STRUCT_RESET(name_, checkdata_cb_) \
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template<bool aComputeData> \
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const nsStyle##name_ * nsStyleContext::DoGetStyle##name_() { \
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if (auto gecko = GetAsGecko()) { \
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if (gecko->mCachedResetData) { \
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const nsStyle##name_ * cachedData = \
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static_cast<nsStyle##name_*>( \
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gecko->mCachedResetData->mStyleStructs[eStyleStruct_##name_]); \
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if (cachedData) /* Have it cached already, yay */ \
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return cachedData; \
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} \
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/* Have the rulenode deal */ \
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AUTO_CHECK_DEPENDENCY(gecko, eStyleStruct_##name_); \
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return gecko->RuleNode()->GetStyle##name_<aComputeData>(gecko); \
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} \
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auto servo = AsServo(); \
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const bool needToCompute = !(mBits & NS_STYLE_INHERIT_BIT(name_)); \
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if (!aComputeData && needToCompute) { \
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return nullptr; \
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} \
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const nsStyle##name_* data = \
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servo->ComputedData()->GetStyle##name_(); \
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/* perform any remaining main thread work on the struct */ \
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if (needToCompute) { \
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const_cast<nsStyle##name_*>(data)->FinishStyle(PresContext()); \
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/* the ServoStyleContext owns the struct */ \
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AddStyleBit(NS_STYLE_INHERIT_BIT(name_)); \
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} \
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return data; \
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}
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#include "nsStyleStructList.h"
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#undef STYLE_STRUCT_RESET
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#undef STYLE_STRUCT_INHERITED
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nsPresContext*
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nsStyleContext::PresContext() const
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{
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MOZ_STYLO_FORWARD(PresContext, ())
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}
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nsStyleContext*
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nsStyleContext::GetStyleIfVisited() const
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{
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MOZ_STYLO_FORWARD(GetStyleIfVisited, ())
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}
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mozilla::GeckoStyleContext*
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nsStyleContext::GetParent() const
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{
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MOZ_ASSERT(IsGecko(),
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"This should be used only in Gecko-backed style system!");
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if (mParent) {
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return mParent->AsGecko();
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} else {
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return nullptr;
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}
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}
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bool
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nsStyleContext::IsLinkContext() const
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{
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return GetStyleIfVisited() && GetStyleIfVisited()->GetParent() == GetParent();
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}
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void
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nsStyleContext::StartBackgroundImageLoads()
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{
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// Just get our background struct; that should do the trick
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StyleBackground();
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}
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#endif // nsStyleContextInlines_h
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