Masayuki Nakano
54d5d4f4a4
This add `TreeKind::FlatForSelection` which should ignore the UA shadow trees which are created in `<details>`, `<video>`, SVG `<use>`, etc because their children are not selectable or slotted and reordered by the shadow tree so that `Selection` and `AbstractRange` need to work with their children in the non-flattened tree. This patch does not change the behavior. It'll be done by a following patch. Differential Revision: https://phabricator.services.mozilla.com/D281304
103 lines
3.6 KiB
C++
103 lines
3.6 KiB
C++
/* 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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#ifndef mozilla_dom_CrossShadowBoundaryRange_h
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#define mozilla_dom_CrossShadowBoundaryRange_h
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#include "mozilla/RangeBoundary.h"
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#include "mozilla/RangeUtils.h"
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#include "mozilla/dom/AbstractRange.h"
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#include "mozilla/dom/StaticRange.h"
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#include "nsTArray.h"
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namespace mozilla {
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class ErrorResult;
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namespace dom {
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/**
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* CrossShadowBoundaryRange inherits StaticRange but the boundaries may cross
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* the shadow DOM boundaries. This won't exposed to the web.
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*/
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class CrossShadowBoundaryRange final : public StaticRange,
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public nsStubMutationObserver {
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public:
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NS_DECL_ISUPPORTS_INHERITED
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NS_IMETHODIMP_(void) DeleteCycleCollectable(void) override;
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NS_DECL_CYCLE_COLLECTION_SCRIPT_HOLDER_CLASS_INHERITED(
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CrossShadowBoundaryRange, StaticRange)
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CrossShadowBoundaryRange() = delete;
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explicit CrossShadowBoundaryRange(const StaticRange& aOther) = delete;
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template <typename SPT, typename SRT, typename EPT, typename ERT>
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static already_AddRefed<CrossShadowBoundaryRange> Create(
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const RangeBoundaryBase<SPT, SRT>& aStartBoundary,
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const RangeBoundaryBase<EPT, ERT>& aEndBoundary, nsRange* aOwner);
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void NotifyNodeBecomesShadowHost(nsINode* aNode) {
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if (aNode == mStart.GetContainer()) {
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mStart.NotifyParentBecomesShadowHost();
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}
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if (aNode == mEnd.GetContainer()) {
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mEnd.NotifyParentBecomesShadowHost();
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}
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}
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nsINode* GetCommonAncestor() const { return mCommonAncestor; }
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// Recomputes mCommonAncestor from the current mStart/mEnd and moves the
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// mutation-observer registration to it if it changed. Called from
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// StaticRange::DoSetRange after the boundaries are updated, so it runs for
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// every boundary change rather than only on initial creation.
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void UpdateCommonAncestor();
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// CrossShadowBoundaryRange should have a very limited usage.
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nsresult SetStartAndEnd(nsINode* aStartContainer, uint32_t aStartOffset,
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nsINode* aEndContainer, uint32_t aEndOffset) = delete;
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template <typename SPT, typename SRT, typename EPT, typename ERT>
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nsresult SetStartAndEnd(const RangeBoundaryBase<SPT, SRT>& aStartBoundary,
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const RangeBoundaryBase<EPT, ERT>& aEndBoundary) {
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return StaticRange::SetStartAndEnd(aStartBoundary, aEndBoundary);
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}
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NS_DECL_NSIMUTATIONOBSERVER_CHARACTERDATACHANGED
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NS_DECL_NSIMUTATIONOBSERVER_CONTENTREMOVED
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NS_DECL_NSIMUTATIONOBSERVER_PARENTCHAINCHANGED
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private:
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explicit CrossShadowBoundaryRange(nsINode* aNode, nsRange* aOwner)
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: StaticRange(aNode, StaticRange::MutationObserved::Yes,
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TreeKind::FlatForSelection),
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mOwner(aOwner) {}
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virtual ~CrossShadowBoundaryRange() = default;
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void ResetToReuse();
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// This is either NULL if this CrossShadowBoundaryRange has been
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// reset by Release() or the closest common shadow-including ancestor
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// of mStart and mEnd.
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nsCOMPtr<nsINode> mCommonAncestor;
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static nsTArray<RefPtr<CrossShadowBoundaryRange>>* sCachedRanges;
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friend class AbstractRange;
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// nsRange owns CrossShadowBoundaryRange; it always outlives
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// CrossShadowBoundaryRange, so it's safe to use raw pointer here.
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nsRange* mOwner;
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};
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inline CrossShadowBoundaryRange* StaticRange::AsCrossShadowBoundaryRange() {
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MOZ_ASSERT(IsCrossShadowBoundaryRange());
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return static_cast<CrossShadowBoundaryRange*>(this);
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}
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} // namespace dom
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} // namespace mozilla
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#endif // #ifndef mozilla_dom_CrossShadowBoundaryRange_h
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