mirror of
https://gitlab.winehq.org/wine/wine-gecko.git
synced 2024-09-13 09:24:08 -07:00
33de67ec1b
This is the second of two big chunks of code moved into the new RestyleManager class from another sources. Note that the undisplayed map remains in nsFrameManager, although it could perhaps have moved.
2688 lines
110 KiB
C++
2688 lines
110 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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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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* Code responsible for managing style changes: tracking what style
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* changes need to happen, scheduling them, and doing them.
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*/
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#include "RestyleManager.h"
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#include "nsLayoutUtils.h"
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#include "GeckoProfiler.h"
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#include "nsStyleChangeList.h"
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#include "nsRuleProcessorData.h"
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#include "nsStyleUtil.h"
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#include "nsCSSFrameConstructor.h"
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#include "nsSVGEffects.h"
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#include "nsCSSRendering.h"
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#include "nsAnimationManager.h"
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#include "nsTransitionManager.h"
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#include "nsViewManager.h"
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#include "nsRenderingContext.h"
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#include "nsSVGIntegrationUtils.h"
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#include "nsCSSAnonBoxes.h"
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#include "nsContainerFrame.h"
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#include "nsPlaceholderFrame.h"
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#include "nsBlockFrame.h"
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#include "nsViewportFrame.h"
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#include "nsSVGTextFrame2.h"
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#include "nsSVGTextPathFrame.h"
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#include "nsIRootBox.h"
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#include "nsIDOMMutationEvent.h"
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#ifdef ACCESSIBILITY
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#include "nsAccessibilityService.h"
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#endif
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namespace mozilla {
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RestyleManager::RestyleManager(nsPresContext* aPresContext)
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: mPresContext(aPresContext)
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, mRebuildAllStyleData(false)
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, mObservingRefreshDriver(false)
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, mInStyleRefresh(false)
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, mPromoteReflowsToReframeRoot(false)
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, mHoverGeneration(0)
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, mRebuildAllExtraHint(nsChangeHint(0))
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, mAnimationGeneration(0)
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, mPendingRestyles(ELEMENT_HAS_PENDING_RESTYLE |
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ELEMENT_IS_POTENTIAL_RESTYLE_ROOT)
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, mPendingAnimationRestyles(ELEMENT_HAS_PENDING_ANIMATION_RESTYLE |
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ELEMENT_IS_POTENTIAL_ANIMATION_RESTYLE_ROOT)
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{
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mPendingRestyles.Init(this);
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mPendingAnimationRestyles.Init(this);
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}
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void
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RestyleManager::NotifyDestroyingFrame(nsIFrame* aFrame)
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{
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mOverflowChangedTracker.RemoveFrame(aFrame);
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}
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#ifdef DEBUG
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// To ensure that the functions below are only called within
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// |ApplyRenderingChangeToTree|.
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static bool gInApplyRenderingChangeToTree = false;
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#endif
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static void
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DoApplyRenderingChangeToTree(nsIFrame* aFrame,
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nsFrameManager* aFrameManager,
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nsChangeHint aChange);
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/**
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* Sync views on aFrame and all of aFrame's descendants (following placeholders),
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* if aChange has nsChangeHint_SyncFrameView.
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* Calls DoApplyRenderingChangeToTree on all aFrame's out-of-flow descendants
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* (following placeholders), if aChange has nsChangeHint_RepaintFrame.
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* aFrame should be some combination of nsChangeHint_SyncFrameView and
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* nsChangeHint_RepaintFrame and nsChangeHint_UpdateOpacityLayer, nothing else.
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*/
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static void
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SyncViewsAndInvalidateDescendants(nsIFrame* aFrame,
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nsFrameManager* aFrameManager,
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nsChangeHint aChange)
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{
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NS_PRECONDITION(gInApplyRenderingChangeToTree,
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"should only be called within ApplyRenderingChangeToTree");
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NS_ASSERTION(aChange == (aChange & (nsChangeHint_RepaintFrame |
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nsChangeHint_SyncFrameView |
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nsChangeHint_UpdateOpacityLayer)),
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"Invalid change flag");
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nsView* view = aFrame->GetView();
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if (view) {
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if (aChange & nsChangeHint_SyncFrameView) {
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nsContainerFrame::SyncFrameViewProperties(aFrame->PresContext(),
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aFrame, nullptr, view);
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}
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}
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nsIFrame::ChildListIterator lists(aFrame);
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for (; !lists.IsDone(); lists.Next()) {
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nsFrameList::Enumerator childFrames(lists.CurrentList());
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for (; !childFrames.AtEnd(); childFrames.Next()) {
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nsIFrame* child = childFrames.get();
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if (!(child->GetStateBits() & NS_FRAME_OUT_OF_FLOW)) {
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// only do frames that don't have placeholders
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if (nsGkAtoms::placeholderFrame == child->GetType()) {
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// do the out-of-flow frame and its continuations
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nsIFrame* outOfFlowFrame =
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nsPlaceholderFrame::GetRealFrameForPlaceholder(child);
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DoApplyRenderingChangeToTree(outOfFlowFrame, aFrameManager,
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aChange);
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} else if (lists.CurrentID() == nsIFrame::kPopupList) {
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DoApplyRenderingChangeToTree(child, aFrameManager,
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aChange);
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} else { // regular frame
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SyncViewsAndInvalidateDescendants(child, aFrameManager, aChange);
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}
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}
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}
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}
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}
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/**
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* To handle nsChangeHint_ChildrenOnlyTransform we must iterate over the child
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* frames of the SVG frame concerned. This helper function is used to find that
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* SVG frame when we encounter nsChangeHint_ChildrenOnlyTransform to ensure
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* that we iterate over the intended children, since sometimes we end up
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* handling that hint while processing hints for one of the SVG frame's
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* ancestor frames.
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*
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* The reason that we sometimes end up trying to process the hint for an
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* ancestor of the SVG frame that the hint is intended for is due to the way we
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* process restyle events. ApplyRenderingChangeToTree adjusts the frame from
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* the restyled element's principle frame to one of its ancestor frames based
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* on what nsCSSRendering::FindBackground returns, since the background style
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* may have been propagated up to an ancestor frame. Processing hints using an
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* ancestor frame is fine in general, but nsChangeHint_ChildrenOnlyTransform is
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* a special case since it is intended to update the children of a specific
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* frame.
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*/
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static nsIFrame*
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GetFrameForChildrenOnlyTransformHint(nsIFrame *aFrame)
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{
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if (aFrame->GetType() == nsGkAtoms::viewportFrame) {
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// This happens if the root-<svg> is fixed positioned, in which case we
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// can't use aFrame->GetContent() to find the primary frame, since
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// GetContent() returns nullptr for ViewportFrame.
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aFrame = aFrame->GetFirstPrincipalChild();
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}
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// For an nsHTMLScrollFrame, this will get the SVG frame that has the
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// children-only transforms:
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aFrame = aFrame->GetContent()->GetPrimaryFrame();
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if (aFrame->GetType() == nsGkAtoms::svgOuterSVGFrame) {
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aFrame = aFrame->GetFirstPrincipalChild();
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NS_ABORT_IF_FALSE(aFrame->GetType() == nsGkAtoms::svgOuterSVGAnonChildFrame,
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"Where is the nsSVGOuterSVGFrame's anon child??");
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}
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NS_ABORT_IF_FALSE(aFrame->IsFrameOfType(nsIFrame::eSVG |
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nsIFrame::eSVGContainer),
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"Children-only transforms only expected on SVG frames");
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return aFrame;
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}
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static void
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DoApplyRenderingChangeToTree(nsIFrame* aFrame,
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nsFrameManager* aFrameManager,
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nsChangeHint aChange)
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{
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NS_PRECONDITION(gInApplyRenderingChangeToTree,
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"should only be called within ApplyRenderingChangeToTree");
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for ( ; aFrame; aFrame = nsLayoutUtils::GetNextContinuationOrSpecialSibling(aFrame)) {
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// Invalidate and sync views on all descendant frames, following placeholders.
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// We don't need to update transforms in SyncViewsAndInvalidateDescendants, because
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// there can't be any out-of-flows or popups that need to be transformed;
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// all out-of-flow descendants of the transformed element must also be
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// descendants of the transformed frame.
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SyncViewsAndInvalidateDescendants(aFrame, aFrameManager,
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nsChangeHint(aChange & (nsChangeHint_RepaintFrame |
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nsChangeHint_SyncFrameView |
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nsChangeHint_UpdateOpacityLayer)));
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// This must be set to true if the rendering change needs to
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// invalidate content. If it's false, a composite-only paint
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// (empty transaction) will be scheduled.
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bool needInvalidatingPaint = false;
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// if frame has view, will already be invalidated
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if (aChange & nsChangeHint_RepaintFrame) {
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// Note that this whole block will be skipped when painting is suppressed
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// (due to our caller ApplyRendingChangeToTree() discarding the
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// nsChangeHint_RepaintFrame hint). If you add handling for any other
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// hints within this block, be sure that they too should be ignored when
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// painting is suppressed.
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needInvalidatingPaint = true;
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aFrame->InvalidateFrameSubtree();
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if (aChange & nsChangeHint_UpdateEffects &&
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aFrame->IsFrameOfType(nsIFrame::eSVG) &&
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!(aFrame->GetStateBits() & NS_STATE_IS_OUTER_SVG)) {
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// Need to update our overflow rects:
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nsSVGUtils::ScheduleReflowSVG(aFrame);
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}
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}
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if (aChange & nsChangeHint_UpdateTextPath) {
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if (aFrame->GetType() == nsGkAtoms::svgTextPathFrame) {
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// Invalidate and reflow the entire nsSVGTextFrame:
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static_cast<nsSVGTextPathFrame*>(aFrame)->NotifyGlyphMetricsChange();
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} else if (aFrame->IsSVGText()) {
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// Invalidate and reflow the entire nsSVGTextFrame2:
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NS_ASSERTION(aFrame->GetContent()->IsSVG(nsGkAtoms::textPath),
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"expected frame for a <textPath> element");
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nsIFrame* text = nsLayoutUtils::GetClosestFrameOfType(
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aFrame,
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nsGkAtoms::svgTextFrame2);
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NS_ASSERTION(text, "expected to find an ancestor nsSVGTextFrame2");
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static_cast<nsSVGTextFrame2*>(text)->NotifyGlyphMetricsChange();
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} else {
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NS_ABORT_IF_FALSE(false, "unexpected frame got "
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"nsChangeHint_UpdateTextPath");
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}
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}
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if (aChange & nsChangeHint_UpdateOpacityLayer) {
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// FIXME/bug 796697: we can get away with empty transactions for
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// opacity updates in many cases.
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needInvalidatingPaint = true;
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aFrame->MarkLayersActive(nsChangeHint_UpdateOpacityLayer);
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if (nsSVGIntegrationUtils::UsingEffectsForFrame(aFrame)) {
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// SVG effects paints the opacity without using
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// nsDisplayOpacity. We need to invalidate manually.
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aFrame->InvalidateFrameSubtree();
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}
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}
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if ((aChange & nsChangeHint_UpdateTransformLayer) &&
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aFrame->IsTransformed()) {
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aFrame->MarkLayersActive(nsChangeHint_UpdateTransformLayer);
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// If we're not already going to do an invalidating paint, see
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// if we can get away with only updating the transform on a
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// layer for this frame, and not scheduling an invalidating
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// paint.
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if (!needInvalidatingPaint) {
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needInvalidatingPaint |= !aFrame->TryUpdateTransformOnly();
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}
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}
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if (aChange & nsChangeHint_ChildrenOnlyTransform) {
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needInvalidatingPaint = true;
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nsIFrame* childFrame =
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GetFrameForChildrenOnlyTransformHint(aFrame)->GetFirstPrincipalChild();
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for ( ; childFrame; childFrame = childFrame->GetNextSibling()) {
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childFrame->MarkLayersActive(nsChangeHint_UpdateTransformLayer);
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}
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}
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aFrame->SchedulePaint(needInvalidatingPaint ?
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nsIFrame::PAINT_DEFAULT :
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nsIFrame::PAINT_COMPOSITE_ONLY);
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}
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}
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static void
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ApplyRenderingChangeToTree(nsPresContext* aPresContext,
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nsIFrame* aFrame,
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nsChangeHint aChange)
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{
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// We check StyleDisplay()->HasTransform() in addition to checking
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// IsTransformed() since we can get here for some frames that don't support
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// CSS transforms.
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NS_ASSERTION(!(aChange & nsChangeHint_UpdateTransformLayer) ||
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aFrame->IsTransformed() ||
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aFrame->StyleDisplay()->HasTransformStyle(),
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"Unexpected UpdateTransformLayer hint");
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nsIPresShell *shell = aPresContext->PresShell();
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if (shell->IsPaintingSuppressed()) {
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// Don't allow synchronous rendering changes when painting is turned off.
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aChange = NS_SubtractHint(aChange, nsChangeHint_RepaintFrame);
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if (!aChange) {
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return;
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}
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}
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// If the frame's background is propagated to an ancestor, walk up to
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// that ancestor.
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nsStyleContext *bgSC;
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while (!nsCSSRendering::FindBackground(aFrame, &bgSC)) {
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aFrame = aFrame->GetParent();
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NS_ASSERTION(aFrame, "root frame must paint");
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}
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// Trigger rendering updates by damaging this frame and any
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// continuations of this frame.
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// XXX this needs to detect the need for a view due to an opacity change and deal with it...
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#ifdef DEBUG
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gInApplyRenderingChangeToTree = true;
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#endif
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DoApplyRenderingChangeToTree(aFrame, shell->FrameManager(), aChange);
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#ifdef DEBUG
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gInApplyRenderingChangeToTree = false;
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#endif
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}
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nsresult
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RestyleManager::StyleChangeReflow(nsIFrame* aFrame, nsChangeHint aHint)
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{
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// If the frame hasn't even received an initial reflow, then don't
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// send it a style-change reflow!
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if (aFrame->GetStateBits() & NS_FRAME_FIRST_REFLOW)
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return NS_OK;
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nsIPresShell::IntrinsicDirty dirtyType;
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if (aHint & nsChangeHint_ClearDescendantIntrinsics) {
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NS_ASSERTION(aHint & nsChangeHint_ClearAncestorIntrinsics,
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"Please read the comments in nsChangeHint.h");
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dirtyType = nsIPresShell::eStyleChange;
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} else if (aHint & nsChangeHint_ClearAncestorIntrinsics) {
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dirtyType = nsIPresShell::eTreeChange;
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} else {
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dirtyType = nsIPresShell::eResize;
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}
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nsFrameState dirtyBits;
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if (aHint & nsChangeHint_NeedDirtyReflow) {
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dirtyBits = NS_FRAME_IS_DIRTY;
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} else {
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dirtyBits = NS_FRAME_HAS_DIRTY_CHILDREN;
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}
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do {
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mPresContext->PresShell()->FrameNeedsReflow(aFrame, dirtyType, dirtyBits);
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aFrame = nsLayoutUtils::GetNextContinuationOrSpecialSibling(aFrame);
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} while (aFrame);
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return NS_OK;
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}
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NS_DECLARE_FRAME_PROPERTY(ChangeListProperty, nullptr)
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/**
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* Return true if aFrame's subtree has placeholders for out-of-flow content
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* whose 'position' style's bit in aPositionMask is set.
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*/
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static bool
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FrameHasPositionedPlaceholderDescendants(nsIFrame* aFrame, uint32_t aPositionMask)
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{
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const nsIFrame::ChildListIDs skip(nsIFrame::kAbsoluteList |
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nsIFrame::kFixedList);
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for (nsIFrame::ChildListIterator lists(aFrame); !lists.IsDone(); lists.Next()) {
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if (!skip.Contains(lists.CurrentID())) {
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for (nsFrameList::Enumerator childFrames(lists.CurrentList());
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!childFrames.AtEnd(); childFrames.Next()) {
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nsIFrame* f = childFrames.get();
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if (f->GetType() == nsGkAtoms::placeholderFrame) {
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nsIFrame* outOfFlow = nsPlaceholderFrame::GetRealFrameForPlaceholder(f);
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// If SVG text frames could appear here, they could confuse us since
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// they ignore their position style ... but they can't.
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NS_ASSERTION(!outOfFlow->IsSVGText(),
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"SVG text frames can't be out of flow");
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if (aPositionMask & (1 << outOfFlow->StyleDisplay()->mPosition)) {
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return true;
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}
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}
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if (FrameHasPositionedPlaceholderDescendants(f, aPositionMask)) {
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return true;
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}
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}
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}
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}
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return false;
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}
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static bool
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NeedToReframeForAddingOrRemovingTransform(nsIFrame* aFrame)
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{
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MOZ_STATIC_ASSERT(0 <= NS_STYLE_POSITION_ABSOLUTE &&
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NS_STYLE_POSITION_ABSOLUTE < 32, "Style constant out of range");
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MOZ_STATIC_ASSERT(0 <= NS_STYLE_POSITION_FIXED &&
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NS_STYLE_POSITION_FIXED < 32, "Style constant out of range");
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uint32_t positionMask;
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// Don't call aFrame->IsPositioned here, since that returns true if
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// the frame already has a transform, and we want to ignore that here
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if (aFrame->IsAbsolutelyPositioned() ||
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aFrame->IsRelativelyPositioned()) {
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// This frame is a container for abs-pos descendants whether or not it
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// has a transform.
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// So abs-pos descendants are no problem; we only need to reframe if
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// we have fixed-pos descendants.
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positionMask = 1 << NS_STYLE_POSITION_FIXED;
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} else {
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// This frame may not be a container for abs-pos descendants already.
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// So reframe if we have abs-pos or fixed-pos descendants.
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positionMask = (1 << NS_STYLE_POSITION_FIXED) |
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(1 << NS_STYLE_POSITION_ABSOLUTE);
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}
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for (nsIFrame* f = aFrame; f;
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f = nsLayoutUtils::GetNextContinuationOrSpecialSibling(f)) {
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if (FrameHasPositionedPlaceholderDescendants(f, positionMask)) {
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return true;
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}
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}
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return false;
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}
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static nsIFrame*
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FindReflowRootFor(nsIFrame* aFrame)
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{
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for (nsIFrame* f = aFrame; f; f = f->GetParent()) {
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if (f->GetStateBits() & NS_FRAME_REFLOW_ROOT) {
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return f;
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}
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}
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return nullptr;
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}
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nsresult
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RestyleManager::ProcessRestyledFrames(nsStyleChangeList& aChangeList)
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{
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NS_ASSERTION(!nsContentUtils::IsSafeToRunScript(),
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"Someone forgot a script blocker");
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int32_t count = aChangeList.Count();
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if (!count)
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return NS_OK;
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PROFILER_LABEL("CSS", "ProcessRestyledFrames");
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// Make sure to not rebuild quote or counter lists while we're
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// processing restyles
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FrameConstructor()->BeginUpdate();
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FramePropertyTable* propTable = mPresContext->PropertyTable();
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// Mark frames so that we skip frames that die along the way, bug 123049.
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// A frame can be in the list multiple times with different hints. Further
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// optmization is possible if nsStyleChangeList::AppendChange could coalesce
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int32_t index = count;
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while (0 <= --index) {
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const nsStyleChangeData* changeData;
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aChangeList.ChangeAt(index, &changeData);
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if (changeData->mFrame) {
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propTable->Set(changeData->mFrame, ChangeListProperty(),
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NS_INT32_TO_PTR(1));
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}
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}
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index = count;
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while (0 <= --index) {
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nsIFrame* frame;
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nsIContent* content;
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bool didReflowThisFrame = false;
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nsChangeHint hint;
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aChangeList.ChangeAt(index, frame, content, hint);
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NS_ASSERTION(!(hint & nsChangeHint_AllReflowHints) ||
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(hint & nsChangeHint_NeedReflow),
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"Reflow hint bits set without actually asking for a reflow");
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// skip any frame that has been destroyed due to a ripple effect
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if (frame && !propTable->Get(frame, ChangeListProperty())) {
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|
continue;
|
|
}
|
|
|
|
if (frame && frame->GetContent() != content) {
|
|
// XXXbz this is due to image maps messing with the primary frame of
|
|
// <area>s. See bug 135040. Remove this block once that's fixed.
|
|
frame = nullptr;
|
|
if (!(hint & nsChangeHint_ReconstructFrame)) {
|
|
continue;
|
|
}
|
|
}
|
|
|
|
if (mPromoteReflowsToReframeRoot &&
|
|
(hint & (nsChangeHint_ReconstructFrame | nsChangeHint_NeedReflow))) {
|
|
nsIFrame* reflowRoot = FindReflowRootFor(frame);
|
|
if (!reflowRoot) {
|
|
// Reflow root is the viewport. Better reframe the document.
|
|
// We don't do this for elements which are inside a reflow root --- they
|
|
// should be OK.
|
|
nsIContent* root = mPresContext->Document()->GetRootElement();
|
|
if (root) {
|
|
NS_UpdateHint(hint, nsChangeHint_ReconstructFrame);
|
|
content = root;
|
|
}
|
|
}
|
|
}
|
|
|
|
if ((hint & nsChangeHint_AddOrRemoveTransform) && frame &&
|
|
!(hint & nsChangeHint_ReconstructFrame)) {
|
|
if (NeedToReframeForAddingOrRemovingTransform(frame)) {
|
|
NS_UpdateHint(hint, nsChangeHint_ReconstructFrame);
|
|
} else {
|
|
// Normally frame construction would set state bits as needed,
|
|
// but we're not going to reconstruct the frame so we need to set them.
|
|
// It's because we need to set this state on each affected frame
|
|
// that we can't coalesce nsChangeHint_AddOrRemoveTransform hints up
|
|
// to ancestors (i.e. it can't be an inherited change hint).
|
|
if (frame->IsPositioned()) {
|
|
// If a transform has been added, we'll be taking this path,
|
|
// but we may be taking this path even if a transform has been
|
|
// removed. It's OK to add the bit even if it's not needed.
|
|
frame->AddStateBits(NS_FRAME_MAY_BE_TRANSFORMED);
|
|
if (!frame->IsAbsoluteContainer() &&
|
|
(frame->GetStateBits() & NS_FRAME_CAN_HAVE_ABSPOS_CHILDREN)) {
|
|
frame->MarkAsAbsoluteContainingBlock();
|
|
}
|
|
} else {
|
|
// Don't remove NS_FRAME_MAY_BE_TRANSFORMED since it may still by
|
|
// transformed by other means. It's OK to have the bit even if it's
|
|
// not needed.
|
|
if (frame->IsAbsoluteContainer()) {
|
|
frame->MarkAsNotAbsoluteContainingBlock();
|
|
}
|
|
}
|
|
}
|
|
}
|
|
if (hint & nsChangeHint_ReconstructFrame) {
|
|
// If we ever start passing true here, be careful of restyles
|
|
// that involve a reframe and animations. In particular, if the
|
|
// restyle we're processing here is an animation restyle, but
|
|
// the style resolution we will do for the frame construction
|
|
// happens async when we're not in an animation restyle already,
|
|
// problems could arise.
|
|
FrameConstructor()->RecreateFramesForContent(content, false);
|
|
} else {
|
|
NS_ASSERTION(frame, "This shouldn't happen");
|
|
|
|
if ((frame->GetStateBits() & NS_FRAME_SVG_LAYOUT) &&
|
|
(frame->GetStateBits() & NS_FRAME_IS_NONDISPLAY)) {
|
|
// frame does not maintain overflow rects, so avoid calling
|
|
// FinishAndStoreOverflow on it:
|
|
hint = NS_SubtractHint(hint,
|
|
NS_CombineHint(nsChangeHint_UpdateOverflow,
|
|
nsChangeHint_ChildrenOnlyTransform));
|
|
}
|
|
|
|
if (hint & nsChangeHint_UpdateEffects) {
|
|
nsSVGEffects::UpdateEffects(frame);
|
|
}
|
|
if (hint & nsChangeHint_NeedReflow) {
|
|
StyleChangeReflow(frame, hint);
|
|
didReflowThisFrame = true;
|
|
}
|
|
if (hint & (nsChangeHint_RepaintFrame | nsChangeHint_SyncFrameView |
|
|
nsChangeHint_UpdateOpacityLayer | nsChangeHint_UpdateTransformLayer |
|
|
nsChangeHint_ChildrenOnlyTransform)) {
|
|
ApplyRenderingChangeToTree(mPresContext, frame, hint);
|
|
}
|
|
if ((hint & nsChangeHint_RecomputePosition) && !didReflowThisFrame) {
|
|
// It is possible for this to fall back to a reflow
|
|
if (!RecomputePosition(frame)) {
|
|
didReflowThisFrame = true;
|
|
}
|
|
}
|
|
NS_ASSERTION(!(hint & nsChangeHint_ChildrenOnlyTransform) ||
|
|
(hint & nsChangeHint_UpdateOverflow),
|
|
"nsChangeHint_UpdateOverflow should be passed too");
|
|
if ((hint & nsChangeHint_UpdateOverflow) && !didReflowThisFrame) {
|
|
if (hint & nsChangeHint_ChildrenOnlyTransform) {
|
|
// The overflow areas of the child frames need to be updated:
|
|
nsIFrame* hintFrame = GetFrameForChildrenOnlyTransformHint(frame);
|
|
nsIFrame* childFrame = hintFrame->GetFirstPrincipalChild();
|
|
for ( ; childFrame; childFrame = childFrame->GetNextSibling()) {
|
|
NS_ABORT_IF_FALSE(childFrame->IsFrameOfType(nsIFrame::eSVG),
|
|
"Not expecting non-SVG children");
|
|
// If |childFrame| is dirty or has dirty children, we don't bother
|
|
// updating overflows since that will happen when it's reflowed.
|
|
if (!(childFrame->GetStateBits() &
|
|
(NS_FRAME_IS_DIRTY | NS_FRAME_HAS_DIRTY_CHILDREN))) {
|
|
mOverflowChangedTracker.AddFrame(childFrame);
|
|
}
|
|
NS_ASSERTION(!nsLayoutUtils::GetNextContinuationOrSpecialSibling(childFrame),
|
|
"SVG frames should not have continuations or special siblings");
|
|
NS_ASSERTION(childFrame->GetParent() == hintFrame,
|
|
"SVG child frame not expected to have different parent");
|
|
}
|
|
}
|
|
// If |frame| is dirty or has dirty children, we don't bother updating
|
|
// overflows since that will happen when it's reflowed.
|
|
if (!(frame->GetStateBits() &
|
|
(NS_FRAME_IS_DIRTY | NS_FRAME_HAS_DIRTY_CHILDREN))) {
|
|
while (frame) {
|
|
mOverflowChangedTracker.AddFrame(frame);
|
|
|
|
frame =
|
|
nsLayoutUtils::GetNextContinuationOrSpecialSibling(frame);
|
|
}
|
|
}
|
|
}
|
|
if (hint & nsChangeHint_UpdateCursor) {
|
|
mPresContext->PresShell()->SynthesizeMouseMove(false);
|
|
}
|
|
}
|
|
}
|
|
|
|
FrameConstructor()->EndUpdate();
|
|
|
|
// cleanup references and verify the style tree. Note that the latter needs
|
|
// to happen once we've processed the whole list, since until then the tree
|
|
// is not in fact in a consistent state.
|
|
index = count;
|
|
while (0 <= --index) {
|
|
const nsStyleChangeData* changeData;
|
|
aChangeList.ChangeAt(index, &changeData);
|
|
if (changeData->mFrame) {
|
|
propTable->Delete(changeData->mFrame, ChangeListProperty());
|
|
}
|
|
|
|
#ifdef DEBUG
|
|
// reget frame from content since it may have been regenerated...
|
|
if (changeData->mContent) {
|
|
if (!nsAnimationManager::ContentOrAncestorHasAnimation(changeData->mContent) &&
|
|
!nsTransitionManager::ContentOrAncestorHasTransition(changeData->mContent)) {
|
|
nsIFrame* frame = changeData->mContent->GetPrimaryFrame();
|
|
if (frame) {
|
|
DebugVerifyStyleTree(frame);
|
|
}
|
|
}
|
|
} else if (!changeData->mFrame ||
|
|
changeData->mFrame->GetType() != nsGkAtoms::viewportFrame) {
|
|
NS_WARNING("Unable to test style tree integrity -- no content node "
|
|
"(and not a viewport frame)");
|
|
}
|
|
#endif
|
|
}
|
|
|
|
aChangeList.Clear();
|
|
return NS_OK;
|
|
}
|
|
|
|
void
|
|
RestyleManager::RestyleElement(Element* aElement,
|
|
nsIFrame* aPrimaryFrame,
|
|
nsChangeHint aMinHint,
|
|
RestyleTracker& aRestyleTracker,
|
|
bool aRestyleDescendants)
|
|
{
|
|
NS_ASSERTION(aPrimaryFrame == aElement->GetPrimaryFrame(),
|
|
"frame/content mismatch");
|
|
if (aPrimaryFrame && aPrimaryFrame->GetContent() != aElement) {
|
|
// XXXbz this is due to image maps messing with the primary frame pointer
|
|
// of <area>s. See bug 135040. We can remove this block once that's fixed.
|
|
aPrimaryFrame = nullptr;
|
|
}
|
|
NS_ASSERTION(!aPrimaryFrame || aPrimaryFrame->GetContent() == aElement,
|
|
"frame/content mismatch");
|
|
|
|
// If we're restyling the root element and there are 'rem' units in
|
|
// use, handle dynamic changes to the definition of a 'rem' here.
|
|
if (mPresContext->UsesRootEMUnits() && aPrimaryFrame) {
|
|
nsStyleContext *oldContext = aPrimaryFrame->StyleContext();
|
|
if (!oldContext->GetParent()) { // check that we're the root element
|
|
nsRefPtr<nsStyleContext> newContext = mPresContext->StyleSet()->
|
|
ResolveStyleFor(aElement, nullptr /* == oldContext->GetParent() */);
|
|
if (oldContext->StyleFont()->mFont.size !=
|
|
newContext->StyleFont()->mFont.size) {
|
|
// The basis for 'rem' units has changed.
|
|
newContext = nullptr;
|
|
DoRebuildAllStyleData(aRestyleTracker, nsChangeHint(0));
|
|
if (aMinHint == 0) {
|
|
return;
|
|
}
|
|
aPrimaryFrame = aElement->GetPrimaryFrame();
|
|
}
|
|
}
|
|
}
|
|
|
|
if (aMinHint & nsChangeHint_ReconstructFrame) {
|
|
FrameConstructor()->RecreateFramesForContent(aElement, false);
|
|
} else if (aPrimaryFrame) {
|
|
nsStyleChangeList changeList;
|
|
ComputeStyleChangeFor(aPrimaryFrame, &changeList, aMinHint,
|
|
aRestyleTracker, aRestyleDescendants);
|
|
ProcessRestyledFrames(changeList);
|
|
} else {
|
|
// no frames, reconstruct for content
|
|
FrameConstructor()->MaybeRecreateFramesForElement(aElement);
|
|
}
|
|
}
|
|
|
|
// Forwarded nsIDocumentObserver method, to handle restyling (and
|
|
// passing the notification to the frame).
|
|
nsresult
|
|
RestyleManager::ContentStateChanged(nsIContent* aContent,
|
|
nsEventStates aStateMask)
|
|
{
|
|
// XXXbz it would be good if this function only took Elements, but
|
|
// we'd have to make ESM guarantee that usefully.
|
|
if (!aContent->IsElement()) {
|
|
return NS_OK;
|
|
}
|
|
|
|
Element* aElement = aContent->AsElement();
|
|
|
|
nsStyleSet* styleSet = mPresContext->StyleSet();
|
|
NS_ASSERTION(styleSet, "couldn't get style set");
|
|
|
|
nsChangeHint hint = NS_STYLE_HINT_NONE;
|
|
// Any change to a content state that affects which frames we construct
|
|
// must lead to a frame reconstruct here if we already have a frame.
|
|
// Note that we never decide through non-CSS means to not create frames
|
|
// based on content states, so if we already don't have a frame we don't
|
|
// need to force a reframe -- if it's needed, the HasStateDependentStyle
|
|
// call will handle things.
|
|
nsIFrame* primaryFrame = aElement->GetPrimaryFrame();
|
|
if (primaryFrame) {
|
|
// If it's generated content, ignore LOADING/etc state changes on it.
|
|
if (!primaryFrame->IsGeneratedContentFrame() &&
|
|
aStateMask.HasAtLeastOneOfStates(NS_EVENT_STATE_BROKEN |
|
|
NS_EVENT_STATE_USERDISABLED |
|
|
NS_EVENT_STATE_SUPPRESSED |
|
|
NS_EVENT_STATE_LOADING)) {
|
|
hint = nsChangeHint_ReconstructFrame;
|
|
} else {
|
|
uint8_t app = primaryFrame->StyleDisplay()->mAppearance;
|
|
if (app) {
|
|
nsITheme *theme = mPresContext->GetTheme();
|
|
if (theme && theme->ThemeSupportsWidget(mPresContext,
|
|
primaryFrame, app)) {
|
|
bool repaint = false;
|
|
theme->WidgetStateChanged(primaryFrame, app, nullptr, &repaint);
|
|
if (repaint) {
|
|
NS_UpdateHint(hint, nsChangeHint_RepaintFrame);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
primaryFrame->ContentStatesChanged(aStateMask);
|
|
}
|
|
|
|
|
|
nsRestyleHint rshint =
|
|
styleSet->HasStateDependentStyle(mPresContext, aElement, aStateMask);
|
|
|
|
if (aStateMask.HasState(NS_EVENT_STATE_HOVER) && rshint != 0) {
|
|
++mHoverGeneration;
|
|
}
|
|
|
|
if (aStateMask.HasState(NS_EVENT_STATE_VISITED)) {
|
|
// Exposing information to the page about whether the link is
|
|
// visited or not isn't really something we can worry about here.
|
|
// FIXME: We could probably do this a bit better.
|
|
NS_UpdateHint(hint, nsChangeHint_RepaintFrame);
|
|
}
|
|
|
|
PostRestyleEvent(aElement, rshint, hint);
|
|
return NS_OK;
|
|
}
|
|
|
|
// Forwarded nsIMutationObserver method, to handle restyling.
|
|
void
|
|
RestyleManager::AttributeWillChange(Element* aElement,
|
|
int32_t aNameSpaceID,
|
|
nsIAtom* aAttribute,
|
|
int32_t aModType)
|
|
{
|
|
nsRestyleHint rshint =
|
|
mPresContext->StyleSet()->HasAttributeDependentStyle(mPresContext,
|
|
aElement,
|
|
aAttribute,
|
|
aModType,
|
|
false);
|
|
PostRestyleEvent(aElement, rshint, NS_STYLE_HINT_NONE);
|
|
}
|
|
|
|
// Forwarded nsIMutationObserver method, to handle restyling (and
|
|
// passing the notification to the frame).
|
|
void
|
|
RestyleManager::AttributeChanged(Element* aElement,
|
|
int32_t aNameSpaceID,
|
|
nsIAtom* aAttribute,
|
|
int32_t aModType)
|
|
{
|
|
// Hold onto the PresShell to prevent ourselves from being destroyed.
|
|
// XXXbz how, exactly, would this attribute change cause us to be
|
|
// destroyed from inside this function?
|
|
nsCOMPtr<nsIPresShell> shell = mPresContext->GetPresShell();
|
|
|
|
// Get the frame associated with the content which is the highest in the frame tree
|
|
nsIFrame* primaryFrame = aElement->GetPrimaryFrame();
|
|
|
|
#if 0
|
|
NS_FRAME_LOG(NS_FRAME_TRACE_CALLS,
|
|
("RestyleManager::AttributeChanged: content=%p[%s] frame=%p",
|
|
aContent, ContentTag(aElement, 0), frame));
|
|
#endif
|
|
|
|
// the style tag has its own interpretation based on aHint
|
|
nsChangeHint hint = aElement->GetAttributeChangeHint(aAttribute, aModType);
|
|
|
|
bool reframe = (hint & nsChangeHint_ReconstructFrame) != 0;
|
|
|
|
#ifdef MOZ_XUL
|
|
// The following listbox widget trap prevents offscreen listbox widget
|
|
// content from being removed and re-inserted (which is what would
|
|
// happen otherwise).
|
|
if (!primaryFrame && !reframe) {
|
|
int32_t namespaceID;
|
|
nsIAtom* tag = mPresContext->Document()->BindingManager()->
|
|
ResolveTag(aElement, &namespaceID);
|
|
|
|
if (namespaceID == kNameSpaceID_XUL &&
|
|
(tag == nsGkAtoms::listitem ||
|
|
tag == nsGkAtoms::listcell))
|
|
return;
|
|
}
|
|
|
|
if (aAttribute == nsGkAtoms::tooltiptext ||
|
|
aAttribute == nsGkAtoms::tooltip)
|
|
{
|
|
nsIRootBox* rootBox = nsIRootBox::GetRootBox(mPresContext->GetPresShell());
|
|
if (rootBox) {
|
|
if (aModType == nsIDOMMutationEvent::REMOVAL)
|
|
rootBox->RemoveTooltipSupport(aElement);
|
|
if (aModType == nsIDOMMutationEvent::ADDITION)
|
|
rootBox->AddTooltipSupport(aElement);
|
|
}
|
|
}
|
|
|
|
#endif // MOZ_XUL
|
|
|
|
if (primaryFrame) {
|
|
// See if we have appearance information for a theme.
|
|
const nsStyleDisplay* disp = primaryFrame->StyleDisplay();
|
|
if (disp->mAppearance) {
|
|
nsITheme *theme = mPresContext->GetTheme();
|
|
if (theme && theme->ThemeSupportsWidget(mPresContext, primaryFrame, disp->mAppearance)) {
|
|
bool repaint = false;
|
|
theme->WidgetStateChanged(primaryFrame, disp->mAppearance, aAttribute, &repaint);
|
|
if (repaint)
|
|
NS_UpdateHint(hint, nsChangeHint_RepaintFrame);
|
|
}
|
|
}
|
|
|
|
// let the frame deal with it now, so we don't have to deal later
|
|
primaryFrame->AttributeChanged(aNameSpaceID, aAttribute, aModType);
|
|
// XXXwaterson should probably check for special IB siblings
|
|
// here, and propagate the AttributeChanged notification to
|
|
// them, as well. Currently, inline frames don't do anything on
|
|
// this notification, so it's not that big a deal.
|
|
}
|
|
|
|
// See if we can optimize away the style re-resolution -- must be called after
|
|
// the frame's AttributeChanged() in case it does something that affects the style
|
|
nsRestyleHint rshint =
|
|
mPresContext->StyleSet()->HasAttributeDependentStyle(mPresContext,
|
|
aElement,
|
|
aAttribute,
|
|
aModType,
|
|
true);
|
|
|
|
PostRestyleEvent(aElement, rshint, hint);
|
|
}
|
|
|
|
void
|
|
RestyleManager::RestyleForEmptyChange(Element* aContainer)
|
|
{
|
|
// In some cases (:empty + E, :empty ~ E), a change if the content of
|
|
// an element requires restyling its parent's siblings.
|
|
nsRestyleHint hint = eRestyle_Subtree;
|
|
nsIContent* grandparent = aContainer->GetParent();
|
|
if (grandparent &&
|
|
(grandparent->GetFlags() & NODE_HAS_SLOW_SELECTOR_LATER_SIBLINGS)) {
|
|
hint = nsRestyleHint(hint | eRestyle_LaterSiblings);
|
|
}
|
|
PostRestyleEvent(aContainer, hint, NS_STYLE_HINT_NONE);
|
|
}
|
|
|
|
void
|
|
RestyleManager::RestyleForAppend(Element* aContainer,
|
|
nsIContent* aFirstNewContent)
|
|
{
|
|
NS_ASSERTION(aContainer, "must have container for append");
|
|
#ifdef DEBUG
|
|
{
|
|
for (nsIContent* cur = aFirstNewContent; cur; cur = cur->GetNextSibling()) {
|
|
NS_ASSERTION(!cur->IsRootOfAnonymousSubtree(),
|
|
"anonymous nodes should not be in child lists");
|
|
}
|
|
}
|
|
#endif
|
|
uint32_t selectorFlags =
|
|
aContainer->GetFlags() & (NODE_ALL_SELECTOR_FLAGS &
|
|
~NODE_HAS_SLOW_SELECTOR_LATER_SIBLINGS);
|
|
if (selectorFlags == 0)
|
|
return;
|
|
|
|
if (selectorFlags & NODE_HAS_EMPTY_SELECTOR) {
|
|
// see whether we need to restyle the container
|
|
bool wasEmpty = true; // :empty or :-moz-only-whitespace
|
|
for (nsIContent* cur = aContainer->GetFirstChild();
|
|
cur != aFirstNewContent;
|
|
cur = cur->GetNextSibling()) {
|
|
// We don't know whether we're testing :empty or :-moz-only-whitespace,
|
|
// so be conservative and assume :-moz-only-whitespace (i.e., make
|
|
// IsSignificantChild less likely to be true, and thus make us more
|
|
// likely to restyle).
|
|
if (nsStyleUtil::IsSignificantChild(cur, true, false)) {
|
|
wasEmpty = false;
|
|
break;
|
|
}
|
|
}
|
|
if (wasEmpty) {
|
|
RestyleForEmptyChange(aContainer);
|
|
return;
|
|
}
|
|
}
|
|
|
|
if (selectorFlags & NODE_HAS_SLOW_SELECTOR) {
|
|
PostRestyleEvent(aContainer, eRestyle_Subtree, NS_STYLE_HINT_NONE);
|
|
// Restyling the container is the most we can do here, so we're done.
|
|
return;
|
|
}
|
|
|
|
if (selectorFlags & NODE_HAS_EDGE_CHILD_SELECTOR) {
|
|
// restyle the last element child before this node
|
|
for (nsIContent* cur = aFirstNewContent->GetPreviousSibling();
|
|
cur;
|
|
cur = cur->GetPreviousSibling()) {
|
|
if (cur->IsElement()) {
|
|
PostRestyleEvent(cur->AsElement(), eRestyle_Subtree, NS_STYLE_HINT_NONE);
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
// Needed since we can't use PostRestyleEvent on non-elements (with
|
|
// eRestyle_LaterSiblings or nsRestyleHint(eRestyle_Subtree |
|
|
// eRestyle_LaterSiblings) as appropriate).
|
|
static void
|
|
RestyleSiblingsStartingWith(RestyleManager* aRestyleManager,
|
|
nsIContent* aStartingSibling /* may be null */)
|
|
{
|
|
for (nsIContent *sibling = aStartingSibling; sibling;
|
|
sibling = sibling->GetNextSibling()) {
|
|
if (sibling->IsElement()) {
|
|
aRestyleManager->
|
|
PostRestyleEvent(sibling->AsElement(),
|
|
nsRestyleHint(eRestyle_Subtree | eRestyle_LaterSiblings),
|
|
NS_STYLE_HINT_NONE);
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
// Restyling for a ContentInserted or CharacterDataChanged notification.
|
|
// This could be used for ContentRemoved as well if we got the
|
|
// notification before the removal happened (and sometimes
|
|
// CharacterDataChanged is more like a removal than an addition).
|
|
// The comments are written and variables are named in terms of it being
|
|
// a ContentInserted notification.
|
|
void
|
|
RestyleManager::RestyleForInsertOrChange(Element* aContainer,
|
|
nsIContent* aChild)
|
|
{
|
|
NS_ASSERTION(!aChild->IsRootOfAnonymousSubtree(),
|
|
"anonymous nodes should not be in child lists");
|
|
uint32_t selectorFlags =
|
|
aContainer ? (aContainer->GetFlags() & NODE_ALL_SELECTOR_FLAGS) : 0;
|
|
if (selectorFlags == 0)
|
|
return;
|
|
|
|
if (selectorFlags & NODE_HAS_EMPTY_SELECTOR) {
|
|
// see whether we need to restyle the container
|
|
bool wasEmpty = true; // :empty or :-moz-only-whitespace
|
|
for (nsIContent* child = aContainer->GetFirstChild();
|
|
child;
|
|
child = child->GetNextSibling()) {
|
|
if (child == aChild)
|
|
continue;
|
|
// We don't know whether we're testing :empty or :-moz-only-whitespace,
|
|
// so be conservative and assume :-moz-only-whitespace (i.e., make
|
|
// IsSignificantChild less likely to be true, and thus make us more
|
|
// likely to restyle).
|
|
if (nsStyleUtil::IsSignificantChild(child, true, false)) {
|
|
wasEmpty = false;
|
|
break;
|
|
}
|
|
}
|
|
if (wasEmpty) {
|
|
RestyleForEmptyChange(aContainer);
|
|
return;
|
|
}
|
|
}
|
|
|
|
if (selectorFlags & NODE_HAS_SLOW_SELECTOR) {
|
|
PostRestyleEvent(aContainer, eRestyle_Subtree, NS_STYLE_HINT_NONE);
|
|
// Restyling the container is the most we can do here, so we're done.
|
|
return;
|
|
}
|
|
|
|
if (selectorFlags & NODE_HAS_SLOW_SELECTOR_LATER_SIBLINGS) {
|
|
// Restyle all later siblings.
|
|
RestyleSiblingsStartingWith(this, aChild->GetNextSibling());
|
|
}
|
|
|
|
if (selectorFlags & NODE_HAS_EDGE_CHILD_SELECTOR) {
|
|
// restyle the previously-first element child if it is after this node
|
|
bool passedChild = false;
|
|
for (nsIContent* content = aContainer->GetFirstChild();
|
|
content;
|
|
content = content->GetNextSibling()) {
|
|
if (content == aChild) {
|
|
passedChild = true;
|
|
continue;
|
|
}
|
|
if (content->IsElement()) {
|
|
if (passedChild) {
|
|
PostRestyleEvent(content->AsElement(), eRestyle_Subtree,
|
|
NS_STYLE_HINT_NONE);
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
// restyle the previously-last element child if it is before this node
|
|
passedChild = false;
|
|
for (nsIContent* content = aContainer->GetLastChild();
|
|
content;
|
|
content = content->GetPreviousSibling()) {
|
|
if (content == aChild) {
|
|
passedChild = true;
|
|
continue;
|
|
}
|
|
if (content->IsElement()) {
|
|
if (passedChild) {
|
|
PostRestyleEvent(content->AsElement(), eRestyle_Subtree,
|
|
NS_STYLE_HINT_NONE);
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
void
|
|
RestyleManager::RestyleForRemove(Element* aContainer,
|
|
nsIContent* aOldChild,
|
|
nsIContent* aFollowingSibling)
|
|
{
|
|
if (aOldChild->IsRootOfAnonymousSubtree()) {
|
|
// This should be an assert, but this is called incorrectly in
|
|
// nsHTMLEditor::DeleteRefToAnonymousNode and the assertions were clogging
|
|
// up the logs. Make it an assert again when that's fixed.
|
|
NS_WARNING("anonymous nodes should not be in child lists (bug 439258)");
|
|
}
|
|
uint32_t selectorFlags =
|
|
aContainer ? (aContainer->GetFlags() & NODE_ALL_SELECTOR_FLAGS) : 0;
|
|
if (selectorFlags == 0)
|
|
return;
|
|
|
|
if (selectorFlags & NODE_HAS_EMPTY_SELECTOR) {
|
|
// see whether we need to restyle the container
|
|
bool isEmpty = true; // :empty or :-moz-only-whitespace
|
|
for (nsIContent* child = aContainer->GetFirstChild();
|
|
child;
|
|
child = child->GetNextSibling()) {
|
|
// We don't know whether we're testing :empty or :-moz-only-whitespace,
|
|
// so be conservative and assume :-moz-only-whitespace (i.e., make
|
|
// IsSignificantChild less likely to be true, and thus make us more
|
|
// likely to restyle).
|
|
if (nsStyleUtil::IsSignificantChild(child, true, false)) {
|
|
isEmpty = false;
|
|
break;
|
|
}
|
|
}
|
|
if (isEmpty) {
|
|
RestyleForEmptyChange(aContainer);
|
|
return;
|
|
}
|
|
}
|
|
|
|
if (selectorFlags & NODE_HAS_SLOW_SELECTOR) {
|
|
PostRestyleEvent(aContainer, eRestyle_Subtree, NS_STYLE_HINT_NONE);
|
|
// Restyling the container is the most we can do here, so we're done.
|
|
return;
|
|
}
|
|
|
|
if (selectorFlags & NODE_HAS_SLOW_SELECTOR_LATER_SIBLINGS) {
|
|
// Restyle all later siblings.
|
|
RestyleSiblingsStartingWith(this, aFollowingSibling);
|
|
}
|
|
|
|
if (selectorFlags & NODE_HAS_EDGE_CHILD_SELECTOR) {
|
|
// restyle the now-first element child if it was after aOldChild
|
|
bool reachedFollowingSibling = false;
|
|
for (nsIContent* content = aContainer->GetFirstChild();
|
|
content;
|
|
content = content->GetNextSibling()) {
|
|
if (content == aFollowingSibling) {
|
|
reachedFollowingSibling = true;
|
|
// do NOT continue here; we might want to restyle this node
|
|
}
|
|
if (content->IsElement()) {
|
|
if (reachedFollowingSibling) {
|
|
PostRestyleEvent(content->AsElement(), eRestyle_Subtree,
|
|
NS_STYLE_HINT_NONE);
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
// restyle the now-last element child if it was before aOldChild
|
|
reachedFollowingSibling = (aFollowingSibling == nullptr);
|
|
for (nsIContent* content = aContainer->GetLastChild();
|
|
content;
|
|
content = content->GetPreviousSibling()) {
|
|
if (content->IsElement()) {
|
|
if (reachedFollowingSibling) {
|
|
PostRestyleEvent(content->AsElement(), eRestyle_Subtree, NS_STYLE_HINT_NONE);
|
|
}
|
|
break;
|
|
}
|
|
if (content == aFollowingSibling) {
|
|
reachedFollowingSibling = true;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
void
|
|
RestyleManager::RebuildAllStyleData(nsChangeHint aExtraHint)
|
|
{
|
|
NS_ASSERTION(!(aExtraHint & nsChangeHint_ReconstructFrame),
|
|
"Should not reconstruct the root of the frame tree. "
|
|
"Use ReconstructDocElementHierarchy instead.");
|
|
|
|
mRebuildAllStyleData = false;
|
|
NS_UpdateHint(aExtraHint, mRebuildAllExtraHint);
|
|
mRebuildAllExtraHint = nsChangeHint(0);
|
|
|
|
nsIPresShell* presShell = mPresContext->GetPresShell();
|
|
if (!presShell || !presShell->GetRootFrame())
|
|
return;
|
|
|
|
// Make sure that the viewmanager will outlive the presshell
|
|
nsRefPtr<nsViewManager> vm = presShell->GetViewManager();
|
|
|
|
// Processing the style changes could cause a flush that propagates to
|
|
// the parent frame and thus destroys the pres shell.
|
|
nsCOMPtr<nsIPresShell> kungFuDeathGrip(presShell);
|
|
|
|
// We may reconstruct frames below and hence process anything that is in the
|
|
// tree. We don't want to get notified to process those items again after.
|
|
presShell->GetDocument()->FlushPendingNotifications(Flush_ContentAndNotify);
|
|
|
|
nsAutoScriptBlocker scriptBlocker;
|
|
|
|
mPresContext->SetProcessingRestyles(true);
|
|
|
|
DoRebuildAllStyleData(mPendingRestyles, aExtraHint);
|
|
|
|
mPresContext->SetProcessingRestyles(false);
|
|
|
|
// Make sure that we process any pending animation restyles from the
|
|
// above style change. Note that we can *almost* implement the above
|
|
// by just posting a style change -- except we really need to restyle
|
|
// the root frame rather than the root element's primary frame.
|
|
ProcessPendingRestyles();
|
|
}
|
|
|
|
void
|
|
RestyleManager::DoRebuildAllStyleData(RestyleTracker& aRestyleTracker,
|
|
nsChangeHint aExtraHint)
|
|
{
|
|
// Tell the style set to get the old rule tree out of the way
|
|
// so we can recalculate while maintaining rule tree immutability
|
|
nsresult rv = mPresContext->StyleSet()->BeginReconstruct();
|
|
if (NS_FAILED(rv)) {
|
|
return;
|
|
}
|
|
|
|
// Recalculate all of the style contexts for the document
|
|
// Note that we can ignore the return value of ComputeStyleChangeFor
|
|
// because we never need to reframe the root frame
|
|
// XXX This could be made faster by not rerunning rule matching
|
|
// (but note that nsPresShell::SetPreferenceStyleRules currently depends
|
|
// on us re-running rule matching here
|
|
nsStyleChangeList changeList;
|
|
// XXX Does it matter that we're passing aExtraHint to the real root
|
|
// frame and not the root node's primary frame?
|
|
// Note: The restyle tracker we pass in here doesn't matter.
|
|
ComputeStyleChangeFor(mPresContext->PresShell()->GetRootFrame(),
|
|
&changeList, aExtraHint,
|
|
aRestyleTracker, true);
|
|
// Process the required changes
|
|
ProcessRestyledFrames(changeList);
|
|
FlushOverflowChangedTracker();
|
|
|
|
// Tell the style set it's safe to destroy the old rule tree. We
|
|
// must do this after the ProcessRestyledFrames call in case the
|
|
// change list has frame reconstructs in it (since frames to be
|
|
// reconstructed will still have their old style context pointers
|
|
// until they are destroyed).
|
|
mPresContext->StyleSet()->EndReconstruct();
|
|
}
|
|
|
|
void
|
|
RestyleManager::ProcessPendingRestyles()
|
|
{
|
|
NS_PRECONDITION(mPresContext->Document(), "No document? Pshaw!");
|
|
NS_PRECONDITION(!nsContentUtils::IsSafeToRunScript(),
|
|
"Missing a script blocker!");
|
|
|
|
// Process non-animation restyles...
|
|
NS_ABORT_IF_FALSE(!mPresContext->IsProcessingRestyles(),
|
|
"Nesting calls to ProcessPendingRestyles?");
|
|
mPresContext->SetProcessingRestyles(true);
|
|
|
|
// Before we process any restyles, we need to ensure that style
|
|
// resulting from any throttled animations (animations that we're
|
|
// running entirely on the compositor thread) is up-to-date, so that
|
|
// if any style changes we cause trigger transitions, we have the
|
|
// correct old style for starting the transition.
|
|
if (nsLayoutUtils::AreAsyncAnimationsEnabled() &&
|
|
mPendingRestyles.Count() > 0) {
|
|
++mAnimationGeneration;
|
|
mPresContext->TransitionManager()->UpdateAllThrottledStyles();
|
|
}
|
|
|
|
mPendingRestyles.ProcessRestyles();
|
|
|
|
#ifdef DEBUG
|
|
uint32_t oldPendingRestyleCount = mPendingRestyles.Count();
|
|
#endif
|
|
|
|
// ...and then process animation restyles. This needs to happen
|
|
// second because we need to start animations that resulted from the
|
|
// first set of restyles (e.g., CSS transitions with negative
|
|
// transition-delay), and because we need to immediately
|
|
// restyle-with-animation any just-restyled elements that are
|
|
// mid-transition (since processing the non-animation restyle ignores
|
|
// the running transition so it can check for a new change on the same
|
|
// property, and then posts an immediate animation style change).
|
|
mPresContext->SetProcessingAnimationStyleChange(true);
|
|
mPendingAnimationRestyles.ProcessRestyles();
|
|
mPresContext->SetProcessingAnimationStyleChange(false);
|
|
|
|
mPresContext->SetProcessingRestyles(false);
|
|
NS_POSTCONDITION(mPendingRestyles.Count() == oldPendingRestyleCount,
|
|
"We should not have posted new non-animation restyles while "
|
|
"processing animation restyles");
|
|
|
|
if (mRebuildAllStyleData) {
|
|
// We probably wasted a lot of work up above, but this seems safest
|
|
// and it should be rarely used.
|
|
// This might add us as a refresh observer again; that's ok.
|
|
RebuildAllStyleData(nsChangeHint(0));
|
|
}
|
|
}
|
|
|
|
void
|
|
RestyleManager::PostRestyleEventCommon(Element* aElement,
|
|
nsRestyleHint aRestyleHint,
|
|
nsChangeHint aMinChangeHint,
|
|
bool aForAnimation)
|
|
{
|
|
if (MOZ_UNLIKELY(mPresContext->PresShell()->IsDestroying())) {
|
|
return;
|
|
}
|
|
|
|
if (aRestyleHint == 0 && !aMinChangeHint) {
|
|
// Nothing to do here
|
|
return;
|
|
}
|
|
|
|
RestyleTracker& tracker =
|
|
aForAnimation ? mPendingAnimationRestyles : mPendingRestyles;
|
|
tracker.AddPendingRestyle(aElement, aRestyleHint, aMinChangeHint);
|
|
|
|
PostRestyleEventInternal(false);
|
|
}
|
|
|
|
void
|
|
RestyleManager::PostRestyleEventInternal(bool aForLazyConstruction)
|
|
{
|
|
// Make sure we're not in a style refresh; if we are, we still have
|
|
// a call to ProcessPendingRestyles coming and there's no need to
|
|
// add ourselves as a refresh observer until then.
|
|
bool inRefresh = !aForLazyConstruction && mInStyleRefresh;
|
|
nsIPresShell* presShell = mPresContext->PresShell();
|
|
if (!mObservingRefreshDriver && !inRefresh) {
|
|
mObservingRefreshDriver = mPresContext->RefreshDriver()->
|
|
AddStyleFlushObserver(presShell);
|
|
}
|
|
|
|
// Unconditionally flag our document as needing a flush. The other
|
|
// option here would be a dedicated boolean to track whether we need
|
|
// to do so (set here and unset in ProcessPendingRestyles).
|
|
presShell->GetDocument()->SetNeedStyleFlush();
|
|
}
|
|
|
|
void
|
|
RestyleManager::PostRebuildAllStyleDataEvent(nsChangeHint aExtraHint)
|
|
{
|
|
NS_ASSERTION(!(aExtraHint & nsChangeHint_ReconstructFrame),
|
|
"Should not reconstruct the root of the frame tree. "
|
|
"Use ReconstructDocElementHierarchy instead.");
|
|
|
|
mRebuildAllStyleData = true;
|
|
NS_UpdateHint(mRebuildAllExtraHint, aExtraHint);
|
|
|
|
// Get a restyle event posted if necessary
|
|
PostRestyleEventInternal(false);
|
|
}
|
|
|
|
bool
|
|
RestyleManager::RecomputePosition(nsIFrame* aFrame)
|
|
{
|
|
// Don't process position changes on table frames, since we already handle
|
|
// the dynamic position change on the outer table frame, and the reflow-based
|
|
// fallback code path also ignores positions on inner table frames.
|
|
if (aFrame->GetType() == nsGkAtoms::tableFrame) {
|
|
return true;
|
|
}
|
|
|
|
// Don't process position changes on frames which have views or the ones which
|
|
// have a view somewhere in their descendants, because the corresponding view
|
|
// needs to be repositioned properly as well.
|
|
if (aFrame->HasView() ||
|
|
(aFrame->GetStateBits() & NS_FRAME_HAS_CHILD_WITH_VIEW)) {
|
|
StyleChangeReflow(aFrame, nsChangeHint_NeedReflow);
|
|
return false;
|
|
}
|
|
|
|
const nsStyleDisplay* display = aFrame->StyleDisplay();
|
|
// Changes to the offsets of a non-positioned element can safely be ignored.
|
|
if (display->mPosition == NS_STYLE_POSITION_STATIC) {
|
|
return true;
|
|
}
|
|
|
|
aFrame->SchedulePaint();
|
|
|
|
// For relative positioning, we can simply update the frame rect
|
|
if (display->mPosition == NS_STYLE_POSITION_RELATIVE) {
|
|
switch (display->mDisplay) {
|
|
case NS_STYLE_DISPLAY_TABLE_CAPTION:
|
|
case NS_STYLE_DISPLAY_TABLE_CELL:
|
|
case NS_STYLE_DISPLAY_TABLE_ROW:
|
|
case NS_STYLE_DISPLAY_TABLE_ROW_GROUP:
|
|
case NS_STYLE_DISPLAY_TABLE_HEADER_GROUP:
|
|
case NS_STYLE_DISPLAY_TABLE_FOOTER_GROUP:
|
|
case NS_STYLE_DISPLAY_TABLE_COLUMN:
|
|
case NS_STYLE_DISPLAY_TABLE_COLUMN_GROUP:
|
|
// We don't currently support relative positioning of inner
|
|
// table elements. If we apply offsets to things we haven't
|
|
// previously offset, we'll get confused. So bail.
|
|
return true;
|
|
default:
|
|
break;
|
|
}
|
|
|
|
nsIFrame* cb = aFrame->GetContainingBlock();
|
|
const nsSize size = cb->GetSize();
|
|
const nsPoint oldOffsets = aFrame->GetRelativeOffset();
|
|
nsMargin newOffsets;
|
|
|
|
// Move the frame
|
|
nsHTMLReflowState::ComputeRelativeOffsets(
|
|
cb->StyleVisibility()->mDirection,
|
|
aFrame, size.width, size.height, newOffsets);
|
|
NS_ASSERTION(newOffsets.left == -newOffsets.right &&
|
|
newOffsets.top == -newOffsets.bottom,
|
|
"ComputeRelativeOffsets should return valid results");
|
|
aFrame->SetPosition(aFrame->GetPosition() - oldOffsets +
|
|
nsPoint(newOffsets.left, newOffsets.top));
|
|
|
|
return true;
|
|
}
|
|
|
|
// For absolute positioning, the width can potentially change if width is
|
|
// auto and either of left or right are not. The height can also potentially
|
|
// change if height is auto and either of top or bottom are not. In these
|
|
// cases we fall back to a reflow, and in all other cases, we attempt to
|
|
// move the frame here.
|
|
// Note that it is possible for the dimensions to not change in the above
|
|
// cases, so we should be a little smarter here and only fall back to reflow
|
|
// when the dimensions will really change (bug 745485).
|
|
const nsStylePosition* position = aFrame->StylePosition();
|
|
if (position->mWidth.GetUnit() != eStyleUnit_Auto &&
|
|
position->mHeight.GetUnit() != eStyleUnit_Auto) {
|
|
// For the absolute positioning case, set up a fake HTML reflow state for
|
|
// the frame, and then get the offsets from it.
|
|
nsRefPtr<nsRenderingContext> rc = aFrame->PresContext()->GetPresShell()->
|
|
GetReferenceRenderingContext();
|
|
|
|
// Construct a bogus parent reflow state so that there's a usable
|
|
// containing block reflow state.
|
|
nsIFrame* parentFrame = aFrame->GetParent();
|
|
nsSize parentSize = parentFrame->GetSize();
|
|
|
|
nsFrameState savedState = parentFrame->GetStateBits();
|
|
nsHTMLReflowState parentReflowState(aFrame->PresContext(), parentFrame,
|
|
rc, parentSize);
|
|
parentFrame->RemoveStateBits(~nsFrameState(0));
|
|
parentFrame->AddStateBits(savedState);
|
|
|
|
NS_WARN_IF_FALSE(parentSize.width != NS_INTRINSICSIZE &&
|
|
parentSize.height != NS_INTRINSICSIZE,
|
|
"parentSize should be valid");
|
|
parentReflowState.SetComputedWidth(std::max(parentSize.width, 0));
|
|
parentReflowState.SetComputedHeight(std::max(parentSize.height, 0));
|
|
parentReflowState.mComputedMargin.SizeTo(0, 0, 0, 0);
|
|
parentSize.height = NS_AUTOHEIGHT;
|
|
|
|
parentReflowState.mComputedPadding = parentFrame->GetUsedPadding();
|
|
parentReflowState.mComputedBorderPadding =
|
|
parentFrame->GetUsedBorderAndPadding();
|
|
|
|
nsSize availSize(parentSize.width, NS_INTRINSICSIZE);
|
|
|
|
nsSize size = aFrame->GetSize();
|
|
ViewportFrame* viewport = do_QueryFrame(parentFrame);
|
|
nsSize cbSize = viewport ?
|
|
viewport->AdjustReflowStateAsContainingBlock(&parentReflowState).Size()
|
|
: aFrame->GetContainingBlock()->GetSize();
|
|
const nsMargin& parentBorder =
|
|
parentReflowState.mStyleBorder->GetComputedBorder();
|
|
cbSize -= nsSize(parentBorder.LeftRight(), parentBorder.TopBottom());
|
|
nsHTMLReflowState reflowState(aFrame->PresContext(), parentReflowState,
|
|
aFrame, availSize, cbSize.width,
|
|
cbSize.height);
|
|
|
|
// If we're solving for 'left' or 'top', then compute it here, in order to
|
|
// match the reflow code path.
|
|
if (NS_AUTOOFFSET == reflowState.mComputedOffsets.left) {
|
|
reflowState.mComputedOffsets.left = cbSize.width -
|
|
reflowState.mComputedOffsets.right -
|
|
reflowState.mComputedMargin.right -
|
|
size.width -
|
|
reflowState.mComputedMargin.left;
|
|
}
|
|
|
|
if (NS_AUTOOFFSET == reflowState.mComputedOffsets.top) {
|
|
reflowState.mComputedOffsets.top = cbSize.height -
|
|
reflowState.mComputedOffsets.bottom -
|
|
reflowState.mComputedMargin.bottom -
|
|
size.height -
|
|
reflowState.mComputedMargin.top;
|
|
}
|
|
|
|
// Move the frame
|
|
nsPoint pos(parentBorder.left + reflowState.mComputedOffsets.left +
|
|
reflowState.mComputedMargin.left,
|
|
parentBorder.top + reflowState.mComputedOffsets.top +
|
|
reflowState.mComputedMargin.top);
|
|
aFrame->SetPosition(pos);
|
|
|
|
return true;
|
|
}
|
|
|
|
// Fall back to a reflow
|
|
StyleChangeReflow(aFrame, nsChangeHint_NeedReflow);
|
|
return false;
|
|
}
|
|
|
|
#ifdef DEBUG
|
|
static void
|
|
DumpContext(nsIFrame* aFrame, nsStyleContext* aContext)
|
|
{
|
|
if (aFrame) {
|
|
fputs("frame: ", stdout);
|
|
nsAutoString name;
|
|
aFrame->GetFrameName(name);
|
|
fputs(NS_LossyConvertUTF16toASCII(name).get(), stdout);
|
|
fprintf(stdout, " (%p)", static_cast<void*>(aFrame));
|
|
}
|
|
if (aContext) {
|
|
fprintf(stdout, " style: %p ", static_cast<void*>(aContext));
|
|
|
|
nsIAtom* pseudoTag = aContext->GetPseudo();
|
|
if (pseudoTag) {
|
|
nsAutoString buffer;
|
|
pseudoTag->ToString(buffer);
|
|
fputs(NS_LossyConvertUTF16toASCII(buffer).get(), stdout);
|
|
fputs(" ", stdout);
|
|
}
|
|
fputs("{}\n", stdout);
|
|
}
|
|
}
|
|
|
|
static void
|
|
VerifySameTree(nsStyleContext* aContext1, nsStyleContext* aContext2)
|
|
{
|
|
nsStyleContext* top1 = aContext1;
|
|
nsStyleContext* top2 = aContext2;
|
|
nsStyleContext* parent;
|
|
for (;;) {
|
|
parent = top1->GetParent();
|
|
if (!parent)
|
|
break;
|
|
top1 = parent;
|
|
}
|
|
for (;;) {
|
|
parent = top2->GetParent();
|
|
if (!parent)
|
|
break;
|
|
top2 = parent;
|
|
}
|
|
NS_ASSERTION(top1 == top2,
|
|
"Style contexts are not in the same style context tree");
|
|
}
|
|
|
|
static void
|
|
VerifyContextParent(nsPresContext* aPresContext, nsIFrame* aFrame,
|
|
nsStyleContext* aContext, nsStyleContext* aParentContext)
|
|
{
|
|
// get the contexts not provided
|
|
if (!aContext) {
|
|
aContext = aFrame->StyleContext();
|
|
}
|
|
|
|
if (!aParentContext) {
|
|
// Get the correct parent context from the frame
|
|
// - if the frame is a placeholder, we get the out of flow frame's context
|
|
// as the parent context instead of asking the frame
|
|
|
|
// get the parent context from the frame (indirectly)
|
|
nsIFrame* providerFrame = aFrame->GetParentStyleContextFrame();
|
|
if (providerFrame)
|
|
aParentContext = providerFrame->StyleContext();
|
|
// aParentContext could still be null
|
|
}
|
|
|
|
NS_ASSERTION(aContext, "Failure to get required contexts");
|
|
nsStyleContext* actualParentContext = aContext->GetParent();
|
|
|
|
if (aParentContext) {
|
|
if (aParentContext != actualParentContext) {
|
|
DumpContext(aFrame, aContext);
|
|
if (aContext == aParentContext) {
|
|
NS_ERROR("Using parent's style context");
|
|
}
|
|
else {
|
|
NS_ERROR("Wrong parent style context");
|
|
fputs("Wrong parent style context: ", stdout);
|
|
DumpContext(nullptr, actualParentContext);
|
|
fputs("should be using: ", stdout);
|
|
DumpContext(nullptr, aParentContext);
|
|
VerifySameTree(actualParentContext, aParentContext);
|
|
fputs("\n", stdout);
|
|
}
|
|
}
|
|
|
|
}
|
|
else {
|
|
if (actualParentContext) {
|
|
NS_ERROR("Have parent context and shouldn't");
|
|
DumpContext(aFrame, aContext);
|
|
fputs("Has parent context: ", stdout);
|
|
DumpContext(nullptr, actualParentContext);
|
|
fputs("Should be null\n\n", stdout);
|
|
}
|
|
}
|
|
|
|
nsStyleContext* childStyleIfVisited = aContext->GetStyleIfVisited();
|
|
// Either childStyleIfVisited has aContext->GetParent()->GetStyleIfVisited()
|
|
// as the parent or it has a different rulenode from aContext _and_ has
|
|
// aContext->GetParent() as the parent.
|
|
if (childStyleIfVisited &&
|
|
!((childStyleIfVisited->RuleNode() != aContext->RuleNode() &&
|
|
childStyleIfVisited->GetParent() == aContext->GetParent()) ||
|
|
childStyleIfVisited->GetParent() ==
|
|
aContext->GetParent()->GetStyleIfVisited())) {
|
|
NS_ERROR("Visited style has wrong parent");
|
|
DumpContext(aFrame, aContext);
|
|
fputs("\n", stdout);
|
|
}
|
|
}
|
|
|
|
static void
|
|
VerifyStyleTree(nsPresContext* aPresContext, nsIFrame* aFrame,
|
|
nsStyleContext* aParentContext)
|
|
{
|
|
nsStyleContext* context = aFrame->StyleContext();
|
|
VerifyContextParent(aPresContext, aFrame, context, nullptr);
|
|
|
|
nsIFrame::ChildListIterator lists(aFrame);
|
|
for (; !lists.IsDone(); lists.Next()) {
|
|
nsFrameList::Enumerator childFrames(lists.CurrentList());
|
|
for (; !childFrames.AtEnd(); childFrames.Next()) {
|
|
nsIFrame* child = childFrames.get();
|
|
if (!(child->GetStateBits() & NS_FRAME_OUT_OF_FLOW)) {
|
|
// only do frames that are in flow
|
|
if (nsGkAtoms::placeholderFrame == child->GetType()) {
|
|
// placeholder: first recurse and verify the out of flow frame,
|
|
// then verify the placeholder's context
|
|
nsIFrame* outOfFlowFrame =
|
|
nsPlaceholderFrame::GetRealFrameForPlaceholder(child);
|
|
|
|
// recurse to out of flow frame, letting the parent context get resolved
|
|
do {
|
|
VerifyStyleTree(aPresContext, outOfFlowFrame, nullptr);
|
|
} while ((outOfFlowFrame = outOfFlowFrame->GetNextContinuation()));
|
|
|
|
// verify placeholder using the parent frame's context as
|
|
// parent context
|
|
VerifyContextParent(aPresContext, child, nullptr, nullptr);
|
|
}
|
|
else { // regular frame
|
|
VerifyStyleTree(aPresContext, child, nullptr);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
// do additional contexts
|
|
int32_t contextIndex = -1;
|
|
while (1) {
|
|
nsStyleContext* extraContext = aFrame->GetAdditionalStyleContext(++contextIndex);
|
|
if (extraContext) {
|
|
VerifyContextParent(aPresContext, aFrame, extraContext, context);
|
|
}
|
|
else {
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
void
|
|
RestyleManager::DebugVerifyStyleTree(nsIFrame* aFrame)
|
|
{
|
|
if (aFrame) {
|
|
nsStyleContext* context = aFrame->StyleContext();
|
|
nsStyleContext* parentContext = context->GetParent();
|
|
VerifyStyleTree(mPresContext, aFrame, parentContext);
|
|
}
|
|
}
|
|
|
|
#endif // DEBUG
|
|
|
|
// aContent must be the content for the frame in question, which may be
|
|
// :before/:after content
|
|
static void
|
|
TryStartingTransition(nsPresContext *aPresContext, nsIContent *aContent,
|
|
nsStyleContext *aOldStyleContext,
|
|
nsRefPtr<nsStyleContext> *aNewStyleContext /* inout */)
|
|
{
|
|
if (!aContent || !aContent->IsElement()) {
|
|
return;
|
|
}
|
|
|
|
// Notify the transition manager, and if it starts a transition,
|
|
// it will give us back a transition-covering style rule which
|
|
// we'll use to get *another* style context. We want to ignore
|
|
// any already-running transitions, but cover up any that we're
|
|
// currently starting with their start value so we don't start
|
|
// them again for descendants that inherit that value.
|
|
nsCOMPtr<nsIStyleRule> coverRule =
|
|
aPresContext->TransitionManager()->StyleContextChanged(
|
|
aContent->AsElement(), aOldStyleContext, *aNewStyleContext);
|
|
if (coverRule) {
|
|
nsCOMArray<nsIStyleRule> rules;
|
|
rules.AppendObject(coverRule);
|
|
*aNewStyleContext = aPresContext->StyleSet()->
|
|
ResolveStyleByAddingRules(*aNewStyleContext, rules);
|
|
}
|
|
}
|
|
|
|
static inline dom::Element*
|
|
ElementForStyleContext(nsIContent* aParentContent,
|
|
nsIFrame* aFrame,
|
|
nsCSSPseudoElements::Type aPseudoType)
|
|
{
|
|
// We don't expect XUL tree stuff here.
|
|
NS_PRECONDITION(aPseudoType == nsCSSPseudoElements::ePseudo_NotPseudoElement ||
|
|
aPseudoType == nsCSSPseudoElements::ePseudo_AnonBox ||
|
|
aPseudoType < nsCSSPseudoElements::ePseudo_PseudoElementCount,
|
|
"Unexpected pseudo");
|
|
// XXX see the comments about the various element confusion in
|
|
// ReResolveStyleContext.
|
|
if (aPseudoType == nsCSSPseudoElements::ePseudo_NotPseudoElement) {
|
|
return aFrame->GetContent()->AsElement();
|
|
}
|
|
|
|
if (aPseudoType == nsCSSPseudoElements::ePseudo_AnonBox) {
|
|
return nullptr;
|
|
}
|
|
|
|
if (aPseudoType == nsCSSPseudoElements::ePseudo_firstLetter) {
|
|
NS_ASSERTION(aFrame->GetType() == nsGkAtoms::letterFrame,
|
|
"firstLetter pseudoTag without a nsFirstLetterFrame");
|
|
nsBlockFrame* block = nsBlockFrame::GetNearestAncestorBlock(aFrame);
|
|
return block->GetContent()->AsElement();
|
|
}
|
|
|
|
nsIContent* content = aParentContent ? aParentContent : aFrame->GetContent();
|
|
return content->AsElement();
|
|
}
|
|
|
|
static nsIFrame*
|
|
GetPrevContinuationWithPossiblySameStyle(nsIFrame* aFrame)
|
|
{
|
|
// Account for {ib} splits when looking for "prevContinuation". In
|
|
// particular, for the first-continuation of a part of an {ib} split we
|
|
// want to use the special prevsibling of the special prevsibling of
|
|
// aFrame, which should have the same style context as aFrame itself.
|
|
// In particular, if aFrame is the first continuation of an inline part
|
|
// of an {ib} split then its special prevsibling is a block, and the
|
|
// special prevsibling of _that_ is an inline, just like aFrame.
|
|
// Similarly, if aFrame is the first continuation of a block part of an
|
|
// {ib} split (an {ib} wrapper block), then its special prevsibling is
|
|
// an inline and the special prevsibling of that is either another {ib}
|
|
// wrapper block block or null.
|
|
nsIFrame *prevContinuation = aFrame->GetPrevContinuation();
|
|
if (!prevContinuation && (aFrame->GetStateBits() & NS_FRAME_IS_SPECIAL)) {
|
|
// We're the first continuation, so we can just get the frame
|
|
// property directly
|
|
prevContinuation = static_cast<nsIFrame*>(
|
|
aFrame->Properties().Get(nsIFrame::IBSplitSpecialPrevSibling()));
|
|
if (prevContinuation) {
|
|
prevContinuation = static_cast<nsIFrame*>(
|
|
prevContinuation->Properties().Get(nsIFrame::IBSplitSpecialPrevSibling()));
|
|
}
|
|
}
|
|
return prevContinuation;
|
|
}
|
|
|
|
nsresult
|
|
RestyleManager::ReparentStyleContext(nsIFrame* aFrame)
|
|
{
|
|
if (nsGkAtoms::placeholderFrame == aFrame->GetType()) {
|
|
// Also reparent the out-of-flow and all its continuations.
|
|
nsIFrame* outOfFlow =
|
|
nsPlaceholderFrame::GetRealFrameForPlaceholder(aFrame);
|
|
NS_ASSERTION(outOfFlow, "no out-of-flow frame");
|
|
do {
|
|
ReparentStyleContext(outOfFlow);
|
|
} while ((outOfFlow = outOfFlow->GetNextContinuation()));
|
|
}
|
|
|
|
// DO NOT verify the style tree before reparenting. The frame
|
|
// tree has already been changed, so this check would just fail.
|
|
nsStyleContext* oldContext = aFrame->StyleContext();
|
|
// XXXbz can oldContext really ever be null?
|
|
if (oldContext) {
|
|
nsRefPtr<nsStyleContext> newContext;
|
|
nsIFrame* providerFrame = aFrame->GetParentStyleContextFrame();
|
|
bool isChild = providerFrame && providerFrame->GetParent() == aFrame;
|
|
nsStyleContext* newParentContext = nullptr;
|
|
nsIFrame* providerChild = nullptr;
|
|
if (isChild) {
|
|
ReparentStyleContext(providerFrame);
|
|
newParentContext = providerFrame->StyleContext();
|
|
providerChild = providerFrame;
|
|
} else if (providerFrame) {
|
|
newParentContext = providerFrame->StyleContext();
|
|
} else {
|
|
NS_NOTREACHED("Reparenting something that has no usable parent? "
|
|
"Shouldn't happen!");
|
|
}
|
|
// XXX need to do something here to produce the correct style context for
|
|
// an IB split whose first inline part is inside a first-line frame.
|
|
// Currently the first IB anonymous block's style context takes the first
|
|
// part's style context as parent, which is wrong since first-line style
|
|
// should not apply to the anonymous block.
|
|
|
|
#ifdef DEBUG
|
|
{
|
|
// Check that our assumption that continuations of the same
|
|
// pseudo-type and with the same style context parent have the
|
|
// same style context is valid before the reresolution. (We need
|
|
// to check the pseudo-type and style context parent because of
|
|
// :first-letter and :first-line, where we create styled and
|
|
// unstyled letter/line frames distinguished by pseudo-type, and
|
|
// then need to distinguish their descendants based on having
|
|
// different parents.)
|
|
nsIFrame *nextContinuation = aFrame->GetNextContinuation();
|
|
if (nextContinuation) {
|
|
nsStyleContext *nextContinuationContext =
|
|
nextContinuation->StyleContext();
|
|
NS_ASSERTION(oldContext == nextContinuationContext ||
|
|
oldContext->GetPseudo() !=
|
|
nextContinuationContext->GetPseudo() ||
|
|
oldContext->GetParent() !=
|
|
nextContinuationContext->GetParent(),
|
|
"continuations should have the same style context");
|
|
}
|
|
}
|
|
#endif
|
|
|
|
nsIFrame *prevContinuation =
|
|
GetPrevContinuationWithPossiblySameStyle(aFrame);
|
|
nsStyleContext *prevContinuationContext;
|
|
bool copyFromContinuation =
|
|
prevContinuation &&
|
|
(prevContinuationContext = prevContinuation->StyleContext())
|
|
->GetPseudo() == oldContext->GetPseudo() &&
|
|
prevContinuationContext->GetParent() == newParentContext;
|
|
if (copyFromContinuation) {
|
|
// Just use the style context from the frame's previous
|
|
// continuation (see assertion about aFrame->GetNextContinuation()
|
|
// above, which we would have previously hit for aFrame's previous
|
|
// continuation).
|
|
newContext = prevContinuationContext;
|
|
} else {
|
|
nsIFrame* parentFrame = aFrame->GetParent();
|
|
Element* element =
|
|
ElementForStyleContext(parentFrame ? parentFrame->GetContent() : nullptr,
|
|
aFrame,
|
|
oldContext->GetPseudoType());
|
|
newContext = mPresContext->StyleSet()->
|
|
ReparentStyleContext(oldContext, newParentContext, element);
|
|
}
|
|
|
|
if (newContext) {
|
|
if (newContext != oldContext) {
|
|
// We probably don't want to initiate transitions from
|
|
// ReparentStyleContext, since we call it during frame
|
|
// construction rather than in response to dynamic changes.
|
|
// Also see the comment at the start of
|
|
// nsTransitionManager::ConsiderStartingTransition.
|
|
#if 0
|
|
if (!copyFromContinuation) {
|
|
TryStartingTransition(mPresContext, aFrame->GetContent(),
|
|
oldContext, &newContext);
|
|
}
|
|
#endif
|
|
|
|
// Make sure to call CalcStyleDifference so that the new context ends
|
|
// up resolving all the structs the old context resolved.
|
|
DebugOnly<nsChangeHint> styleChange =
|
|
oldContext->CalcStyleDifference(newContext, nsChangeHint(0));
|
|
// The style change is always 0 because we have the same rulenode and
|
|
// CalcStyleDifference optimizes us away. That's OK, though:
|
|
// reparenting should never trigger a frame reconstruct, and whenever
|
|
// it's happening we already plan to reflow and repaint the frames.
|
|
NS_ASSERTION(!(styleChange & nsChangeHint_ReconstructFrame),
|
|
"Our frame tree is likely to be bogus!");
|
|
|
|
aFrame->SetStyleContext(newContext);
|
|
|
|
nsIFrame::ChildListIterator lists(aFrame);
|
|
for (; !lists.IsDone(); lists.Next()) {
|
|
nsFrameList::Enumerator childFrames(lists.CurrentList());
|
|
for (; !childFrames.AtEnd(); childFrames.Next()) {
|
|
nsIFrame* child = childFrames.get();
|
|
// only do frames that are in flow
|
|
if (!(child->GetStateBits() & NS_FRAME_OUT_OF_FLOW) &&
|
|
child != providerChild) {
|
|
#ifdef DEBUG
|
|
if (nsGkAtoms::placeholderFrame == child->GetType()) {
|
|
nsIFrame* outOfFlowFrame =
|
|
nsPlaceholderFrame::GetRealFrameForPlaceholder(child);
|
|
NS_ASSERTION(outOfFlowFrame, "no out-of-flow frame");
|
|
|
|
NS_ASSERTION(outOfFlowFrame != providerChild,
|
|
"Out of flow provider?");
|
|
}
|
|
#endif
|
|
ReparentStyleContext(child);
|
|
}
|
|
}
|
|
}
|
|
|
|
// If this frame is part of an IB split, then the style context of
|
|
// the next part of the split might be a child of our style context.
|
|
// Reparent its style context just in case one of our ancestors
|
|
// (split or not) hasn't done so already). It's not a problem to
|
|
// reparent the same frame twice because the "if (newContext !=
|
|
// oldContext)" check will prevent us from redoing work.
|
|
if ((aFrame->GetStateBits() & NS_FRAME_IS_SPECIAL) &&
|
|
!aFrame->GetPrevContinuation()) {
|
|
nsIFrame* sib = static_cast<nsIFrame*>
|
|
(aFrame->Properties().Get(nsIFrame::IBSplitSpecialSibling()));
|
|
if (sib) {
|
|
ReparentStyleContext(sib);
|
|
}
|
|
}
|
|
|
|
// do additional contexts
|
|
int32_t contextIndex = -1;
|
|
while (1) {
|
|
nsStyleContext* oldExtraContext =
|
|
aFrame->GetAdditionalStyleContext(++contextIndex);
|
|
if (oldExtraContext) {
|
|
nsRefPtr<nsStyleContext> newExtraContext;
|
|
newExtraContext = mPresContext->StyleSet()->
|
|
ReparentStyleContext(oldExtraContext,
|
|
newContext, nullptr);
|
|
if (newExtraContext) {
|
|
if (newExtraContext != oldExtraContext) {
|
|
// Make sure to call CalcStyleDifference so that the new
|
|
// context ends up resolving all the structs the old context
|
|
// resolved.
|
|
styleChange =
|
|
oldExtraContext->CalcStyleDifference(newExtraContext,
|
|
nsChangeHint(0));
|
|
// The style change is always 0 because we have the same
|
|
// rulenode and CalcStyleDifference optimizes us away. That's
|
|
// OK, though: reparenting should never trigger a frame
|
|
// reconstruct, and whenever it's happening we already plan to
|
|
// reflow and repaint the frames.
|
|
NS_ASSERTION(!(styleChange & nsChangeHint_ReconstructFrame),
|
|
"Our frame tree is likely to be bogus!");
|
|
}
|
|
|
|
aFrame->SetAdditionalStyleContext(contextIndex, newExtraContext);
|
|
}
|
|
}
|
|
else {
|
|
break;
|
|
}
|
|
}
|
|
#ifdef DEBUG
|
|
VerifyStyleTree(mPresContext, aFrame, newParentContext);
|
|
#endif
|
|
}
|
|
}
|
|
}
|
|
return NS_OK;
|
|
}
|
|
|
|
static void
|
|
CaptureChange(nsStyleContext* aOldContext, nsStyleContext* aNewContext,
|
|
nsIFrame* aFrame, nsIContent* aContent,
|
|
nsStyleChangeList* aChangeList,
|
|
/*inout*/nsChangeHint &aMinChange,
|
|
/*in*/nsChangeHint aParentHintsNotHandledForDescendants,
|
|
/*out*/nsChangeHint &aHintsNotHandledForDescendants,
|
|
nsChangeHint aChangeToAssume)
|
|
{
|
|
nsChangeHint ourChange = aOldContext->CalcStyleDifference(aNewContext,
|
|
aParentHintsNotHandledForDescendants);
|
|
NS_ASSERTION(!(ourChange & nsChangeHint_AllReflowHints) ||
|
|
(ourChange & nsChangeHint_NeedReflow),
|
|
"Reflow hint bits set without actually asking for a reflow");
|
|
|
|
// nsChangeHint_UpdateEffects is inherited, but it can be set due to changes
|
|
// in inherited properties (fill and stroke). Avoid propagating it into
|
|
// text nodes.
|
|
if ((ourChange & nsChangeHint_UpdateEffects) &&
|
|
aContent && !aContent->IsElement()) {
|
|
ourChange = NS_SubtractHint(ourChange, nsChangeHint_UpdateEffects);
|
|
}
|
|
|
|
NS_UpdateHint(ourChange, aChangeToAssume);
|
|
if (NS_UpdateHint(aMinChange, ourChange)) {
|
|
if (!(ourChange & nsChangeHint_ReconstructFrame) || aContent) {
|
|
aChangeList->AppendChange(aFrame, aContent, ourChange);
|
|
}
|
|
}
|
|
aHintsNotHandledForDescendants = NS_HintsNotHandledForDescendantsIn(ourChange);
|
|
}
|
|
|
|
/**
|
|
* Recompute style for aFrame and accumulate changes into aChangeList
|
|
* given that aMinChange is already accumulated for an ancestor.
|
|
* aParentContent is the content node used to resolve the parent style
|
|
* context. This means that, for pseudo-elements, it is the content
|
|
* that should be used for selector matching (rather than the fake
|
|
* content node attached to the frame).
|
|
*
|
|
* For aParentFrameHintsNotHandledForDescendants, see
|
|
* nsStyleContext::CalcStyleDifference.
|
|
*/
|
|
nsChangeHint
|
|
RestyleManager::ReResolveStyleContext(nsPresContext *aPresContext,
|
|
nsIFrame *aFrame,
|
|
nsIContent *aParentContent,
|
|
nsStyleChangeList *aChangeList,
|
|
nsChangeHint aMinChange,
|
|
nsChangeHint aParentFrameHintsNotHandledForDescendants,
|
|
nsRestyleHint aRestyleHint,
|
|
RestyleTracker& aRestyleTracker,
|
|
DesiredA11yNotifications aDesiredA11yNotifications,
|
|
nsTArray<nsIContent*>& aVisibleKidsOfHiddenElement,
|
|
TreeMatchContext &aTreeMatchContext)
|
|
{
|
|
// We need to generate a new change list entry for every frame whose style
|
|
// comparision returns one of these hints. These hints don't automatically
|
|
// update all their descendant frames.
|
|
aMinChange = NS_SubtractHint(aMinChange, NS_HintsNotHandledForDescendantsIn(aMinChange));
|
|
|
|
// It would be nice if we could make stronger assertions here; they
|
|
// would let us simplify the ?: expressions below setting |content|
|
|
// and |pseudoContent| in sensible ways as well as making what
|
|
// |localContent|, |content|, and |pseudoContent| mean make more
|
|
// sense. However, we can't, because of frame trees like the one in
|
|
// https://bugzilla.mozilla.org/show_bug.cgi?id=472353#c14 . Once we
|
|
// fix bug 242277 we should be able to make this make more sense.
|
|
NS_ASSERTION(aFrame->GetContent() || !aParentContent ||
|
|
!aParentContent->GetParent(),
|
|
"frame must have content (unless at the top of the tree)");
|
|
// XXXldb get new context from prev-in-flow if possible, to avoid
|
|
// duplication. (Or should we just let |GetContext| handle that?)
|
|
// Getting the hint would be nice too, but that's harder.
|
|
|
|
// XXXbryner we may be able to avoid some of the refcounting goop here.
|
|
// We do need a reference to oldContext for the lifetime of this function, and it's possible
|
|
// that the frame has the last reference to it, so AddRef it here.
|
|
|
|
nsChangeHint assumeDifferenceHint = NS_STYLE_HINT_NONE;
|
|
// XXXbz oldContext should just be an nsRefPtr
|
|
nsStyleContext* oldContext = aFrame->StyleContext();
|
|
nsStyleSet* styleSet = aPresContext->StyleSet();
|
|
|
|
// XXXbz the nsIFrame constructor takes an nsStyleContext, so how
|
|
// could oldContext be null?
|
|
if (oldContext) {
|
|
oldContext->AddRef();
|
|
|
|
#ifdef ACCESSIBILITY
|
|
bool wasFrameVisible = nsIPresShell::IsAccessibilityActive() ?
|
|
oldContext->StyleVisibility()->IsVisible() : false;
|
|
#endif
|
|
|
|
nsIAtom* const pseudoTag = oldContext->GetPseudo();
|
|
const nsCSSPseudoElements::Type pseudoType = oldContext->GetPseudoType();
|
|
nsIContent* localContent = aFrame->GetContent();
|
|
// |content| is the node that we used for rule matching of
|
|
// normal elements (not pseudo-elements) and for which we generate
|
|
// framechange hints if we need them.
|
|
// XXXldb Why does it make sense to use aParentContent? (See
|
|
// comment above assertion at start of function.)
|
|
nsIContent* content = localContent ? localContent : aParentContent;
|
|
|
|
if (content && content->IsElement()) {
|
|
content->OwnerDoc()->FlushPendingLinkUpdates();
|
|
RestyleTracker::RestyleData restyleData;
|
|
if (aRestyleTracker.GetRestyleData(content->AsElement(), &restyleData)) {
|
|
if (NS_UpdateHint(aMinChange, restyleData.mChangeHint)) {
|
|
aChangeList->AppendChange(aFrame, content, restyleData.mChangeHint);
|
|
}
|
|
aRestyleHint = nsRestyleHint(aRestyleHint | restyleData.mRestyleHint);
|
|
}
|
|
}
|
|
|
|
nsRestyleHint childRestyleHint = aRestyleHint;
|
|
|
|
if (childRestyleHint == eRestyle_Self) {
|
|
childRestyleHint = nsRestyleHint(0);
|
|
}
|
|
|
|
nsStyleContext* parentContext;
|
|
nsIFrame* resolvedChild = nullptr;
|
|
// Get the frame providing the parent style context. If it is a
|
|
// child, then resolve the provider first.
|
|
nsIFrame* providerFrame = aFrame->GetParentStyleContextFrame();
|
|
bool isChild = providerFrame && providerFrame->GetParent() == aFrame;
|
|
if (!isChild) {
|
|
if (providerFrame)
|
|
parentContext = providerFrame->StyleContext();
|
|
else
|
|
parentContext = nullptr;
|
|
}
|
|
else {
|
|
MOZ_ASSERT(providerFrame->GetContent() == aFrame->GetContent(),
|
|
"Postcondition for GetParentStyleContextFrame() violated. "
|
|
"That means we need to add the current element to the "
|
|
"ancestor filter.");
|
|
|
|
// resolve the provider here (before aFrame below).
|
|
|
|
// assumeDifferenceHint forces the parent's change to be also
|
|
// applied to this frame, no matter what
|
|
// nsStyleContext::CalcStyleDifference says. CalcStyleDifference
|
|
// can't be trusted because it assumes any changes to the parent
|
|
// style context provider will be automatically propagated to
|
|
// the frame(s) with child style contexts.
|
|
|
|
assumeDifferenceHint = ReResolveStyleContext(aPresContext, providerFrame,
|
|
aParentContent, aChangeList,
|
|
aMinChange,
|
|
nsChangeHint_Hints_NotHandledForDescendants,
|
|
aRestyleHint,
|
|
aRestyleTracker,
|
|
aDesiredA11yNotifications,
|
|
aVisibleKidsOfHiddenElement,
|
|
aTreeMatchContext);
|
|
|
|
// The provider's new context becomes the parent context of
|
|
// aFrame's context.
|
|
parentContext = providerFrame->StyleContext();
|
|
// Set |resolvedChild| so we don't bother resolving the
|
|
// provider again.
|
|
resolvedChild = providerFrame;
|
|
}
|
|
|
|
if (providerFrame != aFrame->GetParent()) {
|
|
// We don't actually know what the parent style context's
|
|
// non-inherited hints were, so assume the worst.
|
|
aParentFrameHintsNotHandledForDescendants =
|
|
nsChangeHint_Hints_NotHandledForDescendants;
|
|
}
|
|
|
|
#ifdef DEBUG
|
|
{
|
|
// Check that our assumption that continuations of the same
|
|
// pseudo-type and with the same style context parent have the
|
|
// same style context is valid before the reresolution. (We need
|
|
// to check the pseudo-type and style context parent because of
|
|
// :first-letter and :first-line, where we create styled and
|
|
// unstyled letter/line frames distinguished by pseudo-type, and
|
|
// then need to distinguish their descendants based on having
|
|
// different parents.)
|
|
nsIFrame *nextContinuation = aFrame->GetNextContinuation();
|
|
if (nextContinuation) {
|
|
nsStyleContext *nextContinuationContext =
|
|
nextContinuation->StyleContext();
|
|
NS_ASSERTION(oldContext == nextContinuationContext ||
|
|
oldContext->GetPseudo() !=
|
|
nextContinuationContext->GetPseudo() ||
|
|
oldContext->GetParent() !=
|
|
nextContinuationContext->GetParent(),
|
|
"continuations should have the same style context");
|
|
}
|
|
// And assert the same thing for {ib} splits. See the comments in
|
|
// GetPrevContinuationWithPossiblySameStyle for an explanation of
|
|
// why we step two forward in the special sibling chain.
|
|
if ((aFrame->GetStateBits() & NS_FRAME_IS_SPECIAL) &&
|
|
!aFrame->GetPrevContinuation()) {
|
|
nsIFrame *nextIBSibling = static_cast<nsIFrame*>(
|
|
aFrame->Properties().Get(nsIFrame::IBSplitSpecialSibling()));
|
|
if (nextIBSibling) {
|
|
nextIBSibling = static_cast<nsIFrame*>(
|
|
nextIBSibling->Properties().Get(nsIFrame::IBSplitSpecialSibling()));
|
|
}
|
|
if (nextIBSibling) {
|
|
nsStyleContext *nextIBSiblingContext =
|
|
nextIBSibling->StyleContext();
|
|
NS_ASSERTION(oldContext == nextIBSiblingContext ||
|
|
oldContext->GetPseudo() !=
|
|
nextIBSiblingContext->GetPseudo() ||
|
|
oldContext->GetParent() !=
|
|
nextIBSiblingContext->GetParent(),
|
|
"continuations should have the same style context");
|
|
}
|
|
}
|
|
}
|
|
#endif
|
|
|
|
// do primary context
|
|
nsRefPtr<nsStyleContext> newContext;
|
|
nsChangeHint nonInheritedHints = nsChangeHint(0);
|
|
nsIFrame *prevContinuation =
|
|
GetPrevContinuationWithPossiblySameStyle(aFrame);
|
|
nsStyleContext *prevContinuationContext;
|
|
bool copyFromContinuation =
|
|
prevContinuation &&
|
|
(prevContinuationContext = prevContinuation->StyleContext())
|
|
->GetPseudo() == oldContext->GetPseudo() &&
|
|
prevContinuationContext->GetParent() == parentContext;
|
|
if (copyFromContinuation) {
|
|
// Just use the style context from the frame's previous
|
|
// continuation (see assertion about aFrame->GetNextContinuation()
|
|
// above, which we would have previously hit for aFrame's previous
|
|
// continuation).
|
|
newContext = prevContinuationContext;
|
|
}
|
|
else if (pseudoTag == nsCSSAnonBoxes::mozNonElement) {
|
|
NS_ASSERTION(localContent,
|
|
"non pseudo-element frame without content node");
|
|
newContext = styleSet->ResolveStyleForNonElement(parentContext);
|
|
}
|
|
else if (!aRestyleHint && !prevContinuation) {
|
|
// Unfortunately, if prevContinuation is non-null then we may have
|
|
// already stolen the restyle tracker entry for this element while
|
|
// processing prevContinuation. So we don't know whether aRestyleHint
|
|
// should really be 0 here or whether it should be eRestyle_Self. Be
|
|
// pessimistic and force an actual reresolve in that situation. The good
|
|
// news is that in the common case when prevContinuation is non-null we
|
|
// just used prevContinuationContext anyway and aren't reaching this code
|
|
// to start with.
|
|
newContext =
|
|
styleSet->ReparentStyleContext(oldContext, parentContext,
|
|
ElementForStyleContext(aParentContent,
|
|
aFrame,
|
|
pseudoType));
|
|
} else if (pseudoType == nsCSSPseudoElements::ePseudo_AnonBox) {
|
|
newContext = styleSet->ResolveAnonymousBoxStyle(pseudoTag,
|
|
parentContext);
|
|
}
|
|
else {
|
|
Element* element = ElementForStyleContext(aParentContent,
|
|
aFrame,
|
|
pseudoType);
|
|
if (pseudoTag) {
|
|
if (pseudoTag == nsCSSPseudoElements::before ||
|
|
pseudoTag == nsCSSPseudoElements::after) {
|
|
// XXX what other pseudos do we need to treat like this?
|
|
newContext = styleSet->ProbePseudoElementStyle(element,
|
|
pseudoType,
|
|
parentContext,
|
|
aTreeMatchContext);
|
|
if (!newContext) {
|
|
// This pseudo should no longer exist; gotta reframe
|
|
NS_UpdateHint(aMinChange, nsChangeHint_ReconstructFrame);
|
|
aChangeList->AppendChange(aFrame, element,
|
|
nsChangeHint_ReconstructFrame);
|
|
// We're reframing anyway; just keep the same context
|
|
newContext = oldContext;
|
|
}
|
|
} else {
|
|
// Don't expect XUL tree stuff here, since it needs a comparator and
|
|
// all.
|
|
NS_ASSERTION(pseudoType <
|
|
nsCSSPseudoElements::ePseudo_PseudoElementCount,
|
|
"Unexpected pseudo type");
|
|
newContext = styleSet->ResolvePseudoElementStyle(element,
|
|
pseudoType,
|
|
parentContext);
|
|
}
|
|
}
|
|
else {
|
|
NS_ASSERTION(localContent,
|
|
"non pseudo-element frame without content node");
|
|
// Skip flex-item style fixup for anonymous subtrees:
|
|
TreeMatchContext::AutoFlexItemStyleFixupSkipper
|
|
flexFixupSkipper(aTreeMatchContext,
|
|
element->IsRootOfNativeAnonymousSubtree());
|
|
newContext = styleSet->ResolveStyleFor(element, parentContext,
|
|
aTreeMatchContext);
|
|
}
|
|
}
|
|
|
|
NS_ASSERTION(newContext, "failed to get new style context");
|
|
if (newContext) {
|
|
if (!parentContext) {
|
|
if (oldContext->RuleNode() == newContext->RuleNode() &&
|
|
oldContext->IsLinkContext() == newContext->IsLinkContext() &&
|
|
oldContext->RelevantLinkVisited() ==
|
|
newContext->RelevantLinkVisited()) {
|
|
// We're the root of the style context tree and the new style
|
|
// context returned has the same rule node. This means that
|
|
// we can use FindChildWithRules to keep a lot of the old
|
|
// style contexts around. However, we need to start from the
|
|
// same root.
|
|
newContext = oldContext;
|
|
}
|
|
}
|
|
|
|
if (newContext != oldContext) {
|
|
if (!copyFromContinuation) {
|
|
TryStartingTransition(aPresContext, aFrame->GetContent(),
|
|
oldContext, &newContext);
|
|
}
|
|
|
|
CaptureChange(oldContext, newContext, aFrame, content, aChangeList,
|
|
aMinChange, aParentFrameHintsNotHandledForDescendants,
|
|
nonInheritedHints, assumeDifferenceHint);
|
|
if (!(aMinChange & nsChangeHint_ReconstructFrame)) {
|
|
// if frame gets regenerated, let it keep old context
|
|
aFrame->SetStyleContext(newContext);
|
|
}
|
|
}
|
|
oldContext->Release();
|
|
}
|
|
else {
|
|
NS_ERROR("resolve style context failed");
|
|
newContext = oldContext; // new context failed, recover...
|
|
}
|
|
|
|
// do additional contexts
|
|
// XXXbz might be able to avoid selector matching here in some
|
|
// cases; won't worry about it for now.
|
|
int32_t contextIndex = -1;
|
|
while (1 == 1) {
|
|
nsStyleContext* oldExtraContext = nullptr;
|
|
oldExtraContext = aFrame->GetAdditionalStyleContext(++contextIndex);
|
|
if (oldExtraContext) {
|
|
nsRefPtr<nsStyleContext> newExtraContext;
|
|
nsIAtom* const extraPseudoTag = oldExtraContext->GetPseudo();
|
|
const nsCSSPseudoElements::Type extraPseudoType =
|
|
oldExtraContext->GetPseudoType();
|
|
NS_ASSERTION(extraPseudoTag &&
|
|
extraPseudoTag != nsCSSAnonBoxes::mozNonElement,
|
|
"extra style context is not pseudo element");
|
|
if (extraPseudoType == nsCSSPseudoElements::ePseudo_AnonBox) {
|
|
newExtraContext = styleSet->ResolveAnonymousBoxStyle(extraPseudoTag,
|
|
newContext);
|
|
}
|
|
else {
|
|
// Don't expect XUL tree stuff here, since it needs a comparator and
|
|
// all.
|
|
NS_ASSERTION(extraPseudoType <
|
|
nsCSSPseudoElements::ePseudo_PseudoElementCount,
|
|
"Unexpected type");
|
|
newExtraContext = styleSet->ResolvePseudoElementStyle(content->AsElement(),
|
|
extraPseudoType,
|
|
newContext);
|
|
}
|
|
if (newExtraContext) {
|
|
if (oldExtraContext != newExtraContext) {
|
|
nsChangeHint extraHintsNotHandledForDescendants = nsChangeHint(0);
|
|
CaptureChange(oldExtraContext, newExtraContext, aFrame, content,
|
|
aChangeList, aMinChange,
|
|
aParentFrameHintsNotHandledForDescendants,
|
|
extraHintsNotHandledForDescendants,
|
|
assumeDifferenceHint);
|
|
NS_UpdateHint(nonInheritedHints, extraHintsNotHandledForDescendants);
|
|
if (!(aMinChange & nsChangeHint_ReconstructFrame)) {
|
|
aFrame->SetAdditionalStyleContext(contextIndex, newExtraContext);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
else {
|
|
break;
|
|
}
|
|
}
|
|
|
|
// now look for undisplayed child content and pseudos
|
|
|
|
// When the root element is display:none, we still construct *some*
|
|
// frames that have the root element as their mContent, down to the
|
|
// DocElementContainingBlock.
|
|
bool checkUndisplayed;
|
|
nsIContent* undisplayedParent;
|
|
nsCSSFrameConstructor* frameConstructor = FrameConstructor();
|
|
if (pseudoTag) {
|
|
checkUndisplayed = aFrame == frameConstructor->
|
|
GetDocElementContainingBlock();
|
|
undisplayedParent = nullptr;
|
|
} else {
|
|
checkUndisplayed = !!localContent;
|
|
undisplayedParent = localContent;
|
|
}
|
|
if (checkUndisplayed) {
|
|
UndisplayedNode* undisplayed =
|
|
frameConstructor->GetAllUndisplayedContentIn(undisplayedParent);
|
|
for (TreeMatchContext::AutoAncestorPusher
|
|
pushAncestor(undisplayed, aTreeMatchContext,
|
|
undisplayedParent ? undisplayedParent->AsElement()
|
|
: nullptr);
|
|
undisplayed; undisplayed = undisplayed->mNext) {
|
|
NS_ASSERTION(undisplayedParent ||
|
|
undisplayed->mContent ==
|
|
mPresContext->Document()->GetRootElement(),
|
|
"undisplayed node child of null must be root");
|
|
NS_ASSERTION(!undisplayed->mStyle->GetPseudo(),
|
|
"Shouldn't have random pseudo style contexts in the "
|
|
"undisplayed map");
|
|
|
|
// Get the parent of the undisplayed content and check if it is a XBL
|
|
// children element. Push the children element as an ancestor here because it does
|
|
// not have a frame and would not otherwise be pushed as an ancestor.
|
|
nsIContent* parent = undisplayed->mContent->GetParent();
|
|
bool pushInsertionPoint = parent && parent->IsActiveChildrenElement();
|
|
TreeMatchContext::AutoAncestorPusher
|
|
insertionPointPusher(pushInsertionPoint,
|
|
aTreeMatchContext,
|
|
parent && parent->IsElement() ? parent->AsElement() : nullptr);
|
|
|
|
nsRestyleHint thisChildHint = childRestyleHint;
|
|
RestyleTracker::RestyleData undisplayedRestyleData;
|
|
if (aRestyleTracker.GetRestyleData(undisplayed->mContent->AsElement(),
|
|
&undisplayedRestyleData)) {
|
|
thisChildHint =
|
|
nsRestyleHint(thisChildHint | undisplayedRestyleData.mRestyleHint);
|
|
}
|
|
nsRefPtr<nsStyleContext> undisplayedContext;
|
|
if (thisChildHint) {
|
|
undisplayedContext =
|
|
styleSet->ResolveStyleFor(undisplayed->mContent->AsElement(),
|
|
newContext,
|
|
aTreeMatchContext);
|
|
} else {
|
|
undisplayedContext =
|
|
styleSet->ReparentStyleContext(undisplayed->mStyle, newContext,
|
|
undisplayed->mContent->AsElement());
|
|
}
|
|
if (undisplayedContext) {
|
|
const nsStyleDisplay* display = undisplayedContext->StyleDisplay();
|
|
if (display->mDisplay != NS_STYLE_DISPLAY_NONE) {
|
|
NS_ASSERTION(undisplayed->mContent,
|
|
"Must have undisplayed content");
|
|
aChangeList->AppendChange(nullptr, undisplayed->mContent,
|
|
NS_STYLE_HINT_FRAMECHANGE);
|
|
// The node should be removed from the undisplayed map when
|
|
// we reframe it.
|
|
} else {
|
|
// update the undisplayed node with the new context
|
|
undisplayed->mStyle = undisplayedContext;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
// Check whether we might need to create a new ::before frame.
|
|
// There's no need to do this if we're planning to reframe already
|
|
// or if we're not forcing restyles on kids.
|
|
if (!(aMinChange & nsChangeHint_ReconstructFrame) &&
|
|
childRestyleHint) {
|
|
// Make sure not to do this for pseudo-frames or frames that
|
|
// can't have generated content.
|
|
if (!pseudoTag &&
|
|
((aFrame->GetStateBits() & NS_FRAME_MAY_HAVE_GENERATED_CONTENT) ||
|
|
// Our content insertion frame might have gotten flagged
|
|
(aFrame->GetContentInsertionFrame()->GetStateBits() &
|
|
NS_FRAME_MAY_HAVE_GENERATED_CONTENT))) {
|
|
// Check for a new :before pseudo and an existing :before
|
|
// frame, but only if the frame is the first continuation.
|
|
nsIFrame* prevContinuation = aFrame->GetPrevContinuation();
|
|
if (!prevContinuation) {
|
|
// Checking for a :before frame is cheaper than getting the
|
|
// :before style context.
|
|
if (!nsLayoutUtils::GetBeforeFrame(aFrame) &&
|
|
nsLayoutUtils::HasPseudoStyle(localContent, newContext,
|
|
nsCSSPseudoElements::ePseudo_before,
|
|
aPresContext)) {
|
|
// Have to create the new :before frame
|
|
NS_UpdateHint(aMinChange, nsChangeHint_ReconstructFrame);
|
|
aChangeList->AppendChange(aFrame, content,
|
|
nsChangeHint_ReconstructFrame);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
// Check whether we might need to create a new ::after frame.
|
|
// There's no need to do this if we're planning to reframe already
|
|
// or if we're not forcing restyles on kids.
|
|
if (!(aMinChange & nsChangeHint_ReconstructFrame) &&
|
|
childRestyleHint) {
|
|
// Make sure not to do this for pseudo-frames or frames that
|
|
// can't have generated content.
|
|
if (!pseudoTag &&
|
|
((aFrame->GetStateBits() & NS_FRAME_MAY_HAVE_GENERATED_CONTENT) ||
|
|
// Our content insertion frame might have gotten flagged
|
|
(aFrame->GetContentInsertionFrame()->GetStateBits() &
|
|
NS_FRAME_MAY_HAVE_GENERATED_CONTENT))) {
|
|
// Check for new :after content, but only if the frame is the
|
|
// last continuation.
|
|
nsIFrame* nextContinuation = aFrame->GetNextContinuation();
|
|
|
|
if (!nextContinuation) {
|
|
// Getting the :after frame is more expensive than getting the pseudo
|
|
// context, so get the pseudo context first.
|
|
if (nsLayoutUtils::HasPseudoStyle(localContent, newContext,
|
|
nsCSSPseudoElements::ePseudo_after,
|
|
aPresContext) &&
|
|
!nsLayoutUtils::GetAfterFrame(aFrame)) {
|
|
// have to create the new :after frame
|
|
NS_UpdateHint(aMinChange, nsChangeHint_ReconstructFrame);
|
|
aChangeList->AppendChange(aFrame, content,
|
|
nsChangeHint_ReconstructFrame);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
// There is no need to waste time crawling into a frame's children
|
|
// on a frame change. The act of reconstructing frames will force
|
|
// new style contexts to be resolved on all of this frame's
|
|
// descendants anyway, so we want to avoid wasting time processing
|
|
// style contexts that we're just going to throw away anyway. - dwh
|
|
if (!(aMinChange & nsChangeHint_ReconstructFrame)) {
|
|
|
|
DesiredA11yNotifications kidsDesiredA11yNotification =
|
|
aDesiredA11yNotifications;
|
|
#ifdef ACCESSIBILITY
|
|
A11yNotificationType ourA11yNotification = eDontNotify;
|
|
// Notify a11y for primary frame only if it's a root frame of visibility
|
|
// changes or its parent frame was hidden while it stays visible and
|
|
// it is not inside a {ib} split or is the first frame of {ib} split.
|
|
if (nsIPresShell::IsAccessibilityActive() &&
|
|
!aFrame->GetPrevContinuation() &&
|
|
!nsLayoutUtils::FrameIsNonFirstInIBSplit(aFrame)) {
|
|
if (aDesiredA11yNotifications == eSendAllNotifications) {
|
|
bool isFrameVisible = newContext->StyleVisibility()->IsVisible();
|
|
if (isFrameVisible != wasFrameVisible) {
|
|
if (isFrameVisible) {
|
|
// Notify a11y the element (perhaps with its children) was shown.
|
|
// We don't fall into this case if this element gets or stays shown
|
|
// while its parent becomes hidden.
|
|
kidsDesiredA11yNotification = eSkipNotifications;
|
|
ourA11yNotification = eNotifyShown;
|
|
} else {
|
|
// The element is being hidden; its children may stay visible, or
|
|
// become visible after being hidden previously. If we'll find
|
|
// visible children then we should notify a11y about that as if
|
|
// they were inserted into tree. Notify a11y this element was
|
|
// hidden.
|
|
kidsDesiredA11yNotification = eNotifyIfShown;
|
|
ourA11yNotification = eNotifyHidden;
|
|
}
|
|
}
|
|
} else if (aDesiredA11yNotifications == eNotifyIfShown &&
|
|
newContext->StyleVisibility()->IsVisible()) {
|
|
// Notify a11y that element stayed visible while its parent was
|
|
// hidden.
|
|
aVisibleKidsOfHiddenElement.AppendElement(aFrame->GetContent());
|
|
kidsDesiredA11yNotification = eSkipNotifications;
|
|
}
|
|
}
|
|
#endif
|
|
|
|
// now do children
|
|
nsIFrame::ChildListIterator lists(aFrame);
|
|
for (TreeMatchContext::AutoAncestorPusher
|
|
pushAncestor(!lists.IsDone(),
|
|
aTreeMatchContext,
|
|
content && content->IsElement() ? content->AsElement()
|
|
: nullptr);
|
|
!lists.IsDone(); lists.Next()) {
|
|
nsFrameList::Enumerator childFrames(lists.CurrentList());
|
|
for (; !childFrames.AtEnd(); childFrames.Next()) {
|
|
nsIFrame* child = childFrames.get();
|
|
if (!(child->GetStateBits() & NS_FRAME_OUT_OF_FLOW)) {
|
|
// Get the parent of the child frame's content and check if it is a XBL
|
|
// children element. Push the children element as an ancestor here because it does
|
|
// not have a frame and would not otherwise be pushed as an ancestor.
|
|
|
|
// Check if the frame has a content because |child| may be a nsPageFrame that does
|
|
// not have a content.
|
|
nsIContent* parent = child->GetContent() ? child->GetContent()->GetParent() : nullptr;
|
|
bool pushInsertionPoint = parent && parent->IsActiveChildrenElement();
|
|
TreeMatchContext::AutoAncestorPusher
|
|
insertionPointPusher(pushInsertionPoint, aTreeMatchContext,
|
|
parent && parent->IsElement() ? parent->AsElement() : nullptr);
|
|
|
|
// only do frames that are in flow
|
|
if (nsGkAtoms::placeholderFrame == child->GetType()) { // placeholder
|
|
// get out of flow frame and recur there
|
|
nsIFrame* outOfFlowFrame =
|
|
nsPlaceholderFrame::GetRealFrameForPlaceholder(child);
|
|
NS_ASSERTION(outOfFlowFrame, "no out-of-flow frame");
|
|
NS_ASSERTION(outOfFlowFrame != resolvedChild,
|
|
"out-of-flow frame not a true descendant");
|
|
|
|
// Note that the out-of-flow may not be a geometric descendant of
|
|
// the frame where we started the reresolve. Therefore, even if
|
|
// aMinChange already includes nsChangeHint_AllReflowHints we don't
|
|
// want to pass that on to the out-of-flow reresolve, since that
|
|
// can lead to the out-of-flow not getting reflowed when it should
|
|
// be (eg a reresolve starting at <body> that involves reflowing
|
|
// the <body> would miss reflowing fixed-pos nodes that also need
|
|
// reflow). In the cases when the out-of-flow _is_ a geometric
|
|
// descendant of a frame we already have a reflow hint for,
|
|
// reflow coalescing should keep us from doing the work twice.
|
|
|
|
// |nsFrame::GetParentStyleContextFrame| checks being out
|
|
// of flow so that this works correctly.
|
|
do {
|
|
ReResolveStyleContext(aPresContext, outOfFlowFrame,
|
|
content, aChangeList,
|
|
NS_SubtractHint(aMinChange,
|
|
nsChangeHint_AllReflowHints),
|
|
nonInheritedHints,
|
|
childRestyleHint,
|
|
aRestyleTracker,
|
|
kidsDesiredA11yNotification,
|
|
aVisibleKidsOfHiddenElement,
|
|
aTreeMatchContext);
|
|
} while ((outOfFlowFrame = outOfFlowFrame->GetNextContinuation()));
|
|
|
|
// reresolve placeholder's context under the same parent
|
|
// as the out-of-flow frame
|
|
ReResolveStyleContext(aPresContext, child, content,
|
|
aChangeList, aMinChange,
|
|
nonInheritedHints,
|
|
childRestyleHint,
|
|
aRestyleTracker,
|
|
kidsDesiredA11yNotification,
|
|
aVisibleKidsOfHiddenElement,
|
|
aTreeMatchContext);
|
|
}
|
|
else { // regular child frame
|
|
if (child != resolvedChild) {
|
|
ReResolveStyleContext(aPresContext, child, content,
|
|
aChangeList, aMinChange,
|
|
nonInheritedHints,
|
|
childRestyleHint,
|
|
aRestyleTracker,
|
|
kidsDesiredA11yNotification,
|
|
aVisibleKidsOfHiddenElement,
|
|
aTreeMatchContext);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
// XXX need to do overflow frames???
|
|
|
|
#ifdef ACCESSIBILITY
|
|
// Send notifications about visibility changes.
|
|
if (ourA11yNotification == eNotifyShown) {
|
|
nsAccessibilityService* accService = nsIPresShell::AccService();
|
|
if (accService) {
|
|
nsIPresShell* presShell = aFrame->PresContext()->GetPresShell();
|
|
nsIContent* content = aFrame->GetContent();
|
|
|
|
accService->ContentRangeInserted(presShell, content->GetParent(),
|
|
content,
|
|
content->GetNextSibling());
|
|
}
|
|
} else if (ourA11yNotification == eNotifyHidden) {
|
|
nsAccessibilityService* accService = nsIPresShell::AccService();
|
|
if (accService) {
|
|
nsIPresShell* presShell = aFrame->PresContext()->GetPresShell();
|
|
nsIContent* content = aFrame->GetContent();
|
|
accService->ContentRemoved(presShell, content->GetParent(), content);
|
|
|
|
// Process children staying shown.
|
|
uint32_t visibleContentCount = aVisibleKidsOfHiddenElement.Length();
|
|
for (uint32_t idx = 0; idx < visibleContentCount; idx++) {
|
|
nsIContent* content = aVisibleKidsOfHiddenElement[idx];
|
|
accService->ContentRangeInserted(presShell, content->GetParent(),
|
|
content, content->GetNextSibling());
|
|
}
|
|
aVisibleKidsOfHiddenElement.Clear();
|
|
}
|
|
}
|
|
#endif
|
|
}
|
|
}
|
|
|
|
return aMinChange;
|
|
}
|
|
|
|
void
|
|
RestyleManager::ComputeStyleChangeFor(nsIFrame* aFrame,
|
|
nsStyleChangeList* aChangeList,
|
|
nsChangeHint aMinChange,
|
|
RestyleTracker& aRestyleTracker,
|
|
bool aRestyleDescendants)
|
|
{
|
|
PROFILER_LABEL("CSS", "ComputeStyleChangeFor");
|
|
|
|
nsIContent *content = aFrame->GetContent();
|
|
if (aMinChange) {
|
|
aChangeList->AppendChange(aFrame, content, aMinChange);
|
|
}
|
|
|
|
nsIFrame* frame = aFrame;
|
|
nsIFrame* frame2 = aFrame;
|
|
|
|
NS_ASSERTION(!frame->GetPrevContinuation(), "must start with the first in flow");
|
|
|
|
// We want to start with this frame and walk all its next-in-flows,
|
|
// as well as all its special siblings and their next-in-flows,
|
|
// reresolving style on all the frames we encounter in this walk.
|
|
|
|
FramePropertyTable* propTable = mPresContext->PropertyTable();
|
|
|
|
TreeMatchContext treeMatchContext(true,
|
|
nsRuleWalker::eRelevantLinkUnvisited,
|
|
mPresContext->Document());
|
|
nsIContent *parent = content ? content->GetParent() : nullptr;
|
|
Element *parentElement =
|
|
parent && parent->IsElement() ? parent->AsElement() : nullptr;
|
|
treeMatchContext.InitAncestors(parentElement);
|
|
nsTArray<nsIContent*> visibleKidsOfHiddenElement;
|
|
do {
|
|
// Outer loop over special siblings
|
|
do {
|
|
// Inner loop over next-in-flows of the current frame
|
|
nsChangeHint frameChange =
|
|
ReResolveStyleContext(mPresContext, frame, nullptr,
|
|
aChangeList, aMinChange, nsChangeHint(0),
|
|
aRestyleDescendants ?
|
|
eRestyle_Subtree : eRestyle_Self,
|
|
aRestyleTracker,
|
|
eSendAllNotifications,
|
|
visibleKidsOfHiddenElement,
|
|
treeMatchContext);
|
|
|
|
if (frameChange & nsChangeHint_ReconstructFrame) {
|
|
// If it's going to cause a framechange, then don't bother
|
|
// with the continuations or special siblings since they'll be
|
|
// clobbered by the frame reconstruct anyway.
|
|
NS_ASSERTION(!frame->GetPrevContinuation(),
|
|
"continuing frame had more severe impact than first-in-flow");
|
|
return;
|
|
}
|
|
|
|
frame = frame->GetNextContinuation();
|
|
} while (frame);
|
|
|
|
// Might we have special siblings?
|
|
if (!(frame2->GetStateBits() & NS_FRAME_IS_SPECIAL)) {
|
|
// nothing more to do here
|
|
return;
|
|
}
|
|
|
|
frame2 = static_cast<nsIFrame*>
|
|
(propTable->Get(frame2, nsIFrame::IBSplitSpecialSibling()));
|
|
frame = frame2;
|
|
} while (frame2);
|
|
}
|
|
|
|
} // namespace mozilla
|