forked from mirrors/gecko-dev
d2ed260822
Summary: Really sorry for the size of the patch. It's mostly automatic s/nsIDocument/Document/ but I had to fix up in a bunch of places manually to add the right namespacing and such. Overall it's not a very interesting patch I think. nsDocument.cpp turns into Document.cpp, nsIDocument.h into Document.h and nsIDocumentInlines.h into DocumentInlines.h. I also changed a bunch of nsCOMPtr usage to RefPtr, but not all of it. While fixing up some of the bits I also removed some unneeded OwnerDoc() null checks and such, but I didn't do anything riskier than that.
511 lines
20 KiB
C++
511 lines
20 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=8 sts=2 et sw=2 tw=80: */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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/*
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* Implementation of the DOM Range object.
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*/
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#ifndef nsRange_h___
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#define nsRange_h___
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#include "nsCOMPtr.h"
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#include "nsINode.h"
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#include "mozilla/dom/Document.h"
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#include "nsLayoutUtils.h"
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#include "prmon.h"
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#include "nsStubMutationObserver.h"
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#include "nsWrapperCache.h"
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#include "mozilla/Attributes.h"
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#include "mozilla/GuardObjects.h"
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#include "mozilla/LinkedList.h"
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#include "mozilla/RangeBoundary.h"
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namespace mozilla {
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class ErrorResult;
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namespace dom {
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struct ClientRectsAndTexts;
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class DocGroup;
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class DocumentFragment;
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class DOMRect;
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class DOMRectList;
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class InspectorFontFace;
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class Selection;
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} // namespace dom
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} // namespace mozilla
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class nsRange final : public nsStubMutationObserver,
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public nsWrapperCache,
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// For linking together selection-associated ranges.
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public mozilla::LinkedListElement<nsRange> {
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typedef mozilla::ErrorResult ErrorResult;
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typedef mozilla::dom::DocGroup DocGroup;
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typedef mozilla::dom::DOMRect DOMRect;
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typedef mozilla::dom::DOMRectList DOMRectList;
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typedef mozilla::RangeBoundary RangeBoundary;
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typedef mozilla::RawRangeBoundary RawRangeBoundary;
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virtual ~nsRange();
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public:
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explicit nsRange(nsINode* aNode);
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static nsresult CreateRange(nsINode* aStartContainer, uint32_t aStartOffset,
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nsINode* aEndContainer, uint32_t aEndOffset,
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nsRange** aRange);
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static nsresult CreateRange(const RawRangeBoundary& aStart,
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const RawRangeBoundary& aEnd, nsRange** aRange);
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NS_DECL_CYCLE_COLLECTING_ISUPPORTS
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NS_DECL_CYCLE_COLLECTION_SCRIPT_HOLDER_CLASS(nsRange)
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nsrefcnt GetRefCount() const { return mRefCnt; }
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nsINode* GetRoot() const { return mRoot; }
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const RangeBoundary& StartRef() const { return mStart; }
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nsINode* GetStartContainer() const { return mStart.Container(); }
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const RangeBoundary& EndRef() const { return mEnd; }
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nsINode* GetEndContainer() const { return mEnd.Container(); }
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uint32_t StartOffset() const {
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return static_cast<uint32_t>(mStart.Offset());
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}
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uint32_t EndOffset() const { return static_cast<uint32_t>(mEnd.Offset()); }
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nsIContent* GetChildAtStartOffset() const {
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return mStart.GetChildAtOffset();
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}
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nsIContent* GetChildAtEndOffset() const { return mEnd.GetChildAtOffset(); }
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bool IsPositioned() const { return mIsPositioned; }
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/**
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* Return true iff this range is part of a Selection object
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* and isn't detached.
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*/
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bool IsInSelection() const { return !!mSelection; }
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/**
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* Called when the range is added/removed from a Selection.
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*/
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void SetSelection(mozilla::dom::Selection* aSelection);
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/**
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* Returns pointer to a Selection if the range is associated with a Selection.
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*/
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mozilla::dom::Selection* GetSelection() const { return mSelection; }
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/**
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* Return true if this range was generated.
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* @see SetIsGenerated
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*/
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bool IsGenerated() const { return mIsGenerated; }
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/**
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* Mark this range as being generated or not.
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* Currently it is used for marking ranges that are created when splitting up
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* a range to exclude a -moz-user-select:none region.
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* @see Selection::AddItem
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* @see ExcludeNonSelectableNodes
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*/
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void SetIsGenerated(bool aIsGenerated) { mIsGenerated = aIsGenerated; }
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nsINode* GetCommonAncestor() const;
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void Reset();
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/**
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* ResetTemporarily() is called when Selection starts to cache the instance
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* to reuse later. This method clears mStart, mEnd and mIsPositioned but
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* does not clear mRoot for reducing the cost to register this as a mutation
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* observer again.
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*/
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void ResetTemporarily() {
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DoSetRange(RawRangeBoundary(), RawRangeBoundary(), mRoot);
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}
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/**
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* SetStart() and SetEnd() sets start point or end point separately.
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* However, this is expensive especially when it's a range of Selection.
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* When you set both start and end of a range, you should use
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* SetStartAndEnd() instead.
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*/
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nsresult SetStart(nsINode* aContainer, uint32_t aOffset) {
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ErrorResult error;
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SetStart(RawRangeBoundary(aContainer, aOffset), error);
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return error.StealNSResult();
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}
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nsresult SetEnd(nsINode* aContainer, uint32_t aOffset) {
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ErrorResult error;
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SetEnd(RawRangeBoundary(aContainer, aOffset), error);
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return error.StealNSResult();
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}
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already_AddRefed<nsRange> CloneRange() const;
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/**
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* SetStartAndEnd() works similar to call both SetStart() and SetEnd().
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* Different from calls them separately, this does nothing if either
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* the start point or the end point is invalid point.
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* If the specified start point is after the end point, the range will be
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* collapsed at the end point. Similarly, if they are in different root,
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* the range will be collapsed at the end point.
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*/
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nsresult SetStartAndEnd(nsINode* aStartContainer, uint32_t aStartOffset,
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nsINode* aEndContainer, uint32_t aEndOffset) {
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return SetStartAndEnd(RawRangeBoundary(aStartContainer, aStartOffset),
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RawRangeBoundary(aEndContainer, aEndOffset));
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}
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nsresult SetStartAndEnd(const RawRangeBoundary& aStart,
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const RawRangeBoundary& aEnd);
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/**
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* Adds all nodes between |aStartContent| and |aEndContent| to the range.
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* The start offset will be set before |aStartContent|,
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* while the end offset will be set immediately after |aEndContent|.
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*
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* Caller must guarantee both nodes are non null and
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* children of |aContainer| and that |aEndContent| is after |aStartContent|.
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*/
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void SelectNodesInContainer(nsINode* aContainer, nsIContent* aStartContent,
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nsIContent* aEndContent);
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/**
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* CollapseTo() works similar to call both SetStart() and SetEnd() with
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* same node and offset. This just calls SetStartAndParent() to set
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* collapsed range at aContainer and aOffset.
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*/
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nsresult CollapseTo(nsINode* aContainer, uint32_t aOffset) {
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return CollapseTo(RawRangeBoundary(aContainer, aOffset));
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}
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nsresult CollapseTo(const RawRangeBoundary& aPoint) {
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return SetStartAndEnd(aPoint, aPoint);
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}
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/**
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* Retrieves node and offset for setting start or end of a range to
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* before or after aNode.
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*/
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static nsINode* GetContainerAndOffsetAfter(nsINode* aNode,
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uint32_t* aOffset) {
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MOZ_ASSERT(aNode);
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MOZ_ASSERT(aOffset);
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*aOffset = 0;
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nsINode* parentNode = aNode->GetParentNode();
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if (!parentNode) {
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return nullptr;
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}
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int32_t indexInParent = parentNode->ComputeIndexOf(aNode);
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if (NS_WARN_IF(indexInParent < 0)) {
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return nullptr;
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}
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*aOffset = static_cast<uint32_t>(indexInParent) + 1;
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return parentNode;
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}
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static nsINode* GetContainerAndOffsetBefore(nsINode* aNode,
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uint32_t* aOffset) {
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MOZ_ASSERT(aNode);
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MOZ_ASSERT(aOffset);
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*aOffset = 0;
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nsINode* parentNode = aNode->GetParentNode();
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if (!parentNode) {
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return nullptr;
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}
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int32_t indexInParent = parentNode->ComputeIndexOf(aNode);
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if (NS_WARN_IF(indexInParent < 0)) {
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return nullptr;
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}
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*aOffset = static_cast<uint32_t>(indexInParent);
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return parentNode;
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}
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// aMaxRanges is the maximum number of text ranges to record for each face
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// (pass 0 to just get the list of faces, without recording exact ranges
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// where each face was used).
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nsresult GetUsedFontFaces(
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nsTArray<nsAutoPtr<mozilla::dom::InspectorFontFace>>& aResult,
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uint32_t aMaxRanges, bool aSkipCollapsedWhitespace);
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// nsIMutationObserver methods
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NS_DECL_NSIMUTATIONOBSERVER_CHARACTERDATACHANGED
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NS_DECL_NSIMUTATIONOBSERVER_CONTENTINSERTED
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NS_DECL_NSIMUTATIONOBSERVER_CONTENTREMOVED
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NS_DECL_NSIMUTATIONOBSERVER_PARENTCHAINCHANGED
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NS_DECL_NSIMUTATIONOBSERVER_CONTENTAPPENDED
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// WebIDL
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static already_AddRefed<nsRange> Constructor(
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const mozilla::dom::GlobalObject& global, mozilla::ErrorResult& aRv);
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bool Collapsed() const {
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return mIsPositioned && mStart.Container() == mEnd.Container() &&
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mStart.Offset() == mEnd.Offset();
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}
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already_AddRefed<mozilla::dom::DocumentFragment> CreateContextualFragment(
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const nsAString& aString, ErrorResult& aError);
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already_AddRefed<mozilla::dom::DocumentFragment> CloneContents(
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ErrorResult& aErr);
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int16_t CompareBoundaryPoints(uint16_t aHow, nsRange& aOther,
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ErrorResult& aErr);
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int16_t ComparePoint(nsINode& aContainer, uint32_t aOffset,
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ErrorResult& aErr) {
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return ComparePoint(RawRangeBoundary(&aContainer, aOffset), aErr);
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}
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int16_t ComparePoint(const RawRangeBoundary& aPoint, ErrorResult& aErr);
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void DeleteContents(ErrorResult& aRv);
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already_AddRefed<mozilla::dom::DocumentFragment> ExtractContents(
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ErrorResult& aErr);
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nsINode* GetCommonAncestorContainer(ErrorResult& aRv) const;
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nsINode* GetStartContainer(ErrorResult& aRv) const;
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uint32_t GetStartOffset(ErrorResult& aRv) const;
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nsINode* GetEndContainer(ErrorResult& aRv) const;
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uint32_t GetEndOffset(ErrorResult& aRv) const;
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void InsertNode(nsINode& aNode, ErrorResult& aErr);
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bool IntersectsNode(nsINode& aNode, ErrorResult& aRv);
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bool IsPointInRange(nsINode& aContainer, uint32_t aOffset,
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ErrorResult& aErr) {
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return IsPointInRange(RawRangeBoundary(&aContainer, aOffset), aErr);
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}
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bool IsPointInRange(const RawRangeBoundary& aPoint, ErrorResult& aErr);
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void ToString(nsAString& aReturn, ErrorResult& aErr);
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void Detach();
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// *JS() methods are mapped to Range.*() of DOM.
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// They may move focus only when the range represents normal selection.
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// These methods shouldn't be used from internal.
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void CollapseJS(bool aToStart);
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void SelectNodeJS(nsINode& aNode, ErrorResult& aErr);
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void SelectNodeContentsJS(nsINode& aNode, ErrorResult& aErr);
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void SetEndJS(nsINode& aNode, uint32_t aOffset, ErrorResult& aErr);
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void SetEndAfterJS(nsINode& aNode, ErrorResult& aErr);
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void SetEndBeforeJS(nsINode& aNode, ErrorResult& aErr);
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void SetStartJS(nsINode& aNode, uint32_t aOffset, ErrorResult& aErr);
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void SetStartAfterJS(nsINode& aNode, ErrorResult& aErr);
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void SetStartBeforeJS(nsINode& aNode, ErrorResult& aErr);
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void SurroundContents(nsINode& aNode, ErrorResult& aErr);
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already_AddRefed<DOMRect> GetBoundingClientRect(bool aClampToEdge = true,
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bool aFlushLayout = true);
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already_AddRefed<DOMRectList> GetClientRects(bool aClampToEdge = true,
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bool aFlushLayout = true);
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void GetClientRectsAndTexts(mozilla::dom::ClientRectsAndTexts& aResult,
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ErrorResult& aErr);
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// Following methods should be used for internal use instead of *JS().
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void SelectNode(nsINode& aNode, ErrorResult& aErr);
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void SelectNodeContents(nsINode& aNode, ErrorResult& aErr);
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void SetEnd(nsINode& aNode, uint32_t aOffset, ErrorResult& aErr);
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void SetEnd(const RawRangeBoundary& aPoint, ErrorResult& aErr);
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void SetEndAfter(nsINode& aNode, ErrorResult& aErr);
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void SetEndBefore(nsINode& aNode, ErrorResult& aErr);
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void SetStart(nsINode& aNode, uint32_t aOffset, ErrorResult& aErr);
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void SetStart(const RawRangeBoundary& aPoint, ErrorResult& aErr);
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void SetStartAfter(nsINode& aNode, ErrorResult& aErr);
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void SetStartBefore(nsINode& aNode, ErrorResult& aErr);
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void Collapse(bool aToStart);
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static void GetInnerTextNoFlush(mozilla::dom::DOMString& aValue,
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mozilla::ErrorResult& aError,
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nsIContent* aContainer);
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nsINode* GetParentObject() const { return mOwner; }
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JSObject* WrapObject(JSContext* cx, JS::Handle<JSObject*> aGivenProto) final;
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DocGroup* GetDocGroup() const;
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private:
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// no copy's or assigns
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nsRange(const nsRange&);
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nsRange& operator=(const nsRange&);
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/**
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* Cut or delete the range's contents.
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*
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* @param aFragment DocumentFragment containing the nodes.
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* May be null to indicate the caller doesn't want a
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* fragment.
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*/
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nsresult CutContents(mozilla::dom::DocumentFragment** frag);
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static nsresult CloneParentsBetween(nsINode* aAncestor, nsINode* aNode,
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nsINode** aClosestAncestor,
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nsINode** aFarthestAncestor);
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/**
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* Returns whether a node is safe to be accessed by the current caller.
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*/
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bool CanAccess(const nsINode&) const;
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public:
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/**
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* Compute the root node of aNode for initializing range classes.
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* When aNode is in an anonymous subtree, this returns the shadow root or
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* binding parent. Otherwise, the root node of the document or document
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* fragment. If this returns nullptr, that means aNode can be neither the
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* start container nor end container of any range.
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*/
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static nsINode* ComputeRootNode(nsINode* aNode);
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/**
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* Return true if aStartContainer/aStartOffset and aEndContainer/aEndOffset
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* are valid start and end points for a range. Otherwise, return false.
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*/
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static bool IsValidPoints(nsINode* aStartContainer, uint32_t aStartOffset,
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nsINode* aEndContainer, uint32_t aEndOffset);
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/******************************************************************************
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* Utility routine to detect if a content node starts before a range and/or
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* ends after a range. If neither it is contained inside the range.
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*
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* XXX - callers responsibility to ensure node in same doc as range!
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*
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*****************************************************************************/
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static nsresult CompareNodeToRange(nsINode* aNode, nsRange* aRange,
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bool* outNodeBefore, bool* outNodeAfter);
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/**
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* Return true if any part of (aNode, aStartOffset) .. (aNode, aEndOffset)
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* overlaps any nsRange in aNode's GetNextRangeCommonAncestor ranges (i.e.
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* where aNode is a descendant of a range's common ancestor node).
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* If a nsRange starts in (aNode, aEndOffset) or if it ends in
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* (aNode, aStartOffset) then it is non-overlapping and the result is false
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* for that nsRange. Collapsed ranges always counts as non-overlapping.
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*/
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static bool IsNodeSelected(nsINode* aNode, uint32_t aStartOffset,
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uint32_t aEndOffset);
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/**
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* This helper function gets rects and correlated text for the given range.
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* @param aTextList optional where nullptr = don't retrieve text
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*/
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static void CollectClientRectsAndText(
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nsLayoutUtils::RectCallback* aCollector,
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mozilla::dom::Sequence<nsString>* aTextList, nsRange* aRange,
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nsINode* aStartContainer, uint32_t aStartOffset, nsINode* aEndContainer,
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uint32_t aEndOffset, bool aClampToEdge, bool aFlushLayout);
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/**
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* Scan this range for -moz-user-select:none nodes and split it up into
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* multiple ranges to exclude those nodes. The resulting ranges are put
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* in aOutRanges. If no -moz-user-select:none node is found in the range
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* then |this| is unmodified and is the only range in aOutRanges.
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* Otherwise, |this| will be modified so that it ends before the first
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* -moz-user-select:none node and additional ranges may also be created.
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* If all nodes in the range are -moz-user-select:none then aOutRanges
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* will be empty.
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* @param aOutRanges the resulting set of ranges
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*/
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void ExcludeNonSelectableNodes(nsTArray<RefPtr<nsRange>>* aOutRanges);
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/**
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* Notify the selection listeners after a range has been modified.
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*/
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MOZ_CAN_RUN_SCRIPT void NotifySelectionListenersAfterRangeSet();
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typedef nsTHashtable<nsPtrHashKey<nsRange>> RangeHashTable;
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protected:
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void RegisterCommonAncestor(nsINode* aNode);
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void UnregisterCommonAncestor(nsINode* aNode, bool aIsUnlinking);
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nsINode* IsValidBoundary(nsINode* aNode) const {
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return ComputeRootNode(aNode);
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}
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/**
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* XXX nsRange should accept 0 - UINT32_MAX as offset. However, users of
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* nsRange treat offset as int32_t. Additionally, some other internal
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* APIs like nsINode::ComputeIndexOf() use int32_t. Therefore,
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* nsRange should accept only 0 - INT32_MAX as valid offset for now.
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*/
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static bool IsValidOffset(uint32_t aOffset) { return aOffset <= INT32_MAX; }
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static bool IsValidOffset(nsINode* aNode, uint32_t aOffset);
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// CharacterDataChanged set aNotInsertedYet to true to disable an assertion
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// and suppress re-registering a range common ancestor node since
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// the new text node of a splitText hasn't been inserted yet.
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// CharacterDataChanged does the re-registering when needed.
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MOZ_CAN_RUN_SCRIPT_BOUNDARY
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void DoSetRange(const RawRangeBoundary& lowerBound,
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const RawRangeBoundary& upperBound, nsINode* aRoot,
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bool aNotInsertedYet = false);
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/**
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* For a range for which IsInSelection() is true, return the common ancestor
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* for the range, which we had to compute when the common ancestor changed or
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* IsInSelection became true, so we could register with it. That is, it's a
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* faster version of GetCommonAncestor that only works for ranges in a
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* Selection. The method will assert and the behavior is undefined if called
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* on a range where IsInSelection() is false.
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*/
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nsINode* GetRegisteredCommonAncestor();
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// Helper to IsNodeSelected.
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static bool IsNodeInSortedRanges(nsINode* aNode, uint32_t aStartOffset,
|
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uint32_t aEndOffset,
|
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const nsTArray<const nsRange*>& aRanges,
|
|
size_t aRangeStart, size_t aRangeEnd);
|
|
|
|
// Assume that this is guaranteed that this is held by the caller when
|
|
// this is used. (Note that we cannot use AutoRestore for mCalledByJS
|
|
// due to a bit field.)
|
|
class MOZ_RAII AutoCalledByJSRestore final {
|
|
private:
|
|
nsRange& mRange;
|
|
bool mOldValue;
|
|
MOZ_DECL_USE_GUARD_OBJECT_NOTIFIER
|
|
|
|
public:
|
|
explicit AutoCalledByJSRestore(
|
|
nsRange& aRange MOZ_GUARD_OBJECT_NOTIFIER_PARAM)
|
|
: mRange(aRange), mOldValue(aRange.mCalledByJS) {
|
|
MOZ_GUARD_OBJECT_NOTIFIER_INIT;
|
|
}
|
|
~AutoCalledByJSRestore() { mRange.mCalledByJS = mOldValue; }
|
|
bool SavedValue() const { return mOldValue; }
|
|
};
|
|
|
|
struct MOZ_STACK_CLASS AutoInvalidateSelection {
|
|
explicit AutoInvalidateSelection(nsRange* aRange) : mRange(aRange) {
|
|
if (!mRange->IsInSelection() || sIsNested) {
|
|
return;
|
|
}
|
|
sIsNested = true;
|
|
mCommonAncestor = mRange->GetRegisteredCommonAncestor();
|
|
}
|
|
~AutoInvalidateSelection();
|
|
nsRange* mRange;
|
|
RefPtr<nsINode> mCommonAncestor;
|
|
static bool sIsNested;
|
|
};
|
|
|
|
RefPtr<mozilla::dom::Document> mOwner;
|
|
nsCOMPtr<nsINode> mRoot;
|
|
// mRegisteredCommonAncestor is only non-null when the range
|
|
// IsInSelection(). It's kept alive via mStartContainer/mEndContainer,
|
|
// because we update it any time those could become disconnected from it.
|
|
nsINode* MOZ_NON_OWNING_REF mRegisteredCommonAncestor;
|
|
mozilla::WeakPtr<mozilla::dom::Selection> mSelection;
|
|
|
|
// These raw pointers are used to remember a child that is about
|
|
// to be inserted between a CharacterData call and a subsequent
|
|
// ContentInserted or ContentAppended call. It is safe to store
|
|
// these refs because the caller is guaranteed to trigger both
|
|
// notifications while holding a strong reference to the new child.
|
|
nsIContent* MOZ_NON_OWNING_REF mNextStartRef;
|
|
nsIContent* MOZ_NON_OWNING_REF mNextEndRef;
|
|
|
|
RangeBoundary mStart;
|
|
RangeBoundary mEnd;
|
|
|
|
bool mIsPositioned : 1;
|
|
bool mIsGenerated : 1;
|
|
bool mCalledByJS : 1;
|
|
};
|
|
|
|
#endif /* nsRange_h___ */
|