mirror of
https://github.com/mozilla/gecko-dev.git
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644bf34f8b
Backed out changeset 033299f27339 (bug 1453011) Backed out changeset 4464997475c1 (bug 1453011) Backed out changeset cae243fb2a3c (bug 1453011) Backed out changeset adf56a83131b (bug 1453011) Backed out changeset 80abe3305b24 (bug 1452981) Backed out changeset 02178545f255 (bug 1452981) Backed out changeset 719f7596c208 (bug 1146316) Backed out changeset 1316c78daeb6 (bug 1146316)
602 lines
21 KiB
C++
602 lines
21 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 nsIDOMRange object.
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*/
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#ifndef nsRange_h___
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#define nsRange_h___
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#include "nsIDOMRange.h"
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#include "nsCOMPtr.h"
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#include "nsINode.h"
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#include "nsIDocument.h"
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#include "nsIDOMNode.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 nsIDOMRange,
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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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{
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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(nsIDOMNode* aStartContainer,
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uint32_t aStartOffset,
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nsIDOMNode* aEndContainer,
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uint32_t aEndOffset,
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nsRange** aRange);
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static nsresult CreateRange(nsIDOMNode* aStartContainer,
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uint32_t aStartOffset,
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nsIDOMNode* aEndContainer,
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uint32_t aEndOffset,
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nsIDOMRange** aRange);
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static nsresult CreateRange(nsINode* aStartContainer,
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uint32_t aStartOffset,
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nsINode* aEndContainer,
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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,
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nsRange** aRange);
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NS_DECL_CYCLE_COLLECTING_ISUPPORTS
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NS_DECL_CYCLE_COLLECTION_SCRIPT_HOLDER_CLASS_AMBIGUOUS(nsRange, nsIDOMRange)
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nsrefcnt GetRefCount() const
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{
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return mRefCnt;
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}
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// nsIDOMRange interface
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NS_DECL_NSIDOMRANGE
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nsINode* GetRoot() const
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{
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return mRoot;
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}
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const RangeBoundary& StartRef() const
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{
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return mStart;
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}
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nsINode* GetStartContainer() const
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{
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return mStart.Container();
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}
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const RangeBoundary& EndRef() const
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{
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return mEnd;
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}
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nsINode* GetEndContainer() const
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{
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return mEnd.Container();
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}
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uint32_t StartOffset() const
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{
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return static_cast<uint32_t>(mStart.Offset());
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}
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uint32_t EndOffset() const
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{
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return static_cast<uint32_t>(mEnd.Offset());
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}
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nsIContent* GetChildAtStartOffset() const
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{
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return mStart.GetChildAtOffset();
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}
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nsIContent* GetChildAtEndOffset() const
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{
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return mEnd.GetChildAtOffset();
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}
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bool IsPositioned() const
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{
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return mIsPositioned;
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}
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void SetMaySpanAnonymousSubtrees(bool aMaySpanAnonymousSubtrees)
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{
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mMaySpanAnonymousSubtrees = aMaySpanAnonymousSubtrees;
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}
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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
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{
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return !!mSelection;
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}
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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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* Return true if this range was generated.
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* @see SetIsGenerated
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*/
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bool IsGenerated() const
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{
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return mIsGenerated;
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}
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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)
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{
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mIsGenerated = aIsGenerated;
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}
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nsINode* GetCommonAncestor() const;
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void Reset();
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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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{
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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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{
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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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{
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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
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SelectNodesInContainer(nsINode* aContainer,
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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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{
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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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{
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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, uint32_t* aOffset)
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{
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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, uint32_t* aOffset)
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{
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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);
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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>
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Constructor(const mozilla::dom::GlobalObject& global,
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mozilla::ErrorResult& aRv);
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bool Collapsed() const
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{
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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>
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CreateContextualFragment(const nsAString& aString, ErrorResult& aError);
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already_AddRefed<mozilla::dom::DocumentFragment>
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CloneContents(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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{
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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>
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ExtractContents(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, ErrorResult& aErr)
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{
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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(
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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 fragment.
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*/
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nsresult CutContents(mozilla::dom::DocumentFragment** frag);
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static nsresult CloneParentsBetween(nsINode* aAncestor,
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nsINode* aNode,
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nsINode** aClosestAncestor,
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nsINode** aFarthestAncestor);
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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 ComputeRootNode(aNode, false);
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}
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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,
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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(nsLayoutUtils::RectCallback* aCollector,
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mozilla::dom::Sequence<nsString>* aTextList,
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nsRange* aRange,
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nsINode* aStartContainer,
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uint32_t aStartOffset,
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nsINode* aEndContainer,
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uint32_t aEndOffset,
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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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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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{
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return ComputeRootNode(aNode, mMaySpanAnonymousSubtrees);
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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
|
|
* APIs like nsINode::ComputeIndexOf() use int32_t. Therefore,
|
|
* nsRange should accept only 0 - INT32_MAX as valid offset for now.
|
|
*/
|
|
static bool IsValidOffset(uint32_t aOffset)
|
|
{
|
|
return aOffset <= INT32_MAX;
|
|
}
|
|
static bool IsValidOffset(nsINode* aNode, uint32_t aOffset);
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|
|
|
static nsINode* ComputeRootNode(nsINode* aNode,
|
|
bool aMaySpanAnonymousSubtrees);
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|
|
|
// CharacterDataChanged set aNotInsertedYet to true to disable an assertion
|
|
// and suppress re-registering a range common ancestor node since
|
|
// the new text node of a splitText hasn't been inserted yet.
|
|
// CharacterDataChanged does the re-registering when needed.
|
|
void DoSetRange(const RawRangeBoundary& lowerBound,
|
|
const RawRangeBoundary& upperBound,
|
|
nsINode* aRoot, bool aNotInsertedYet = false);
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|
|
|
/**
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|
* For a range for which IsInSelection() is true, return the common ancestor
|
|
* for the range, which we had to compute when the common ancestor changed or
|
|
* IsInSelection became true, so we could register with it. That is, it's a
|
|
* faster version of GetCommonAncestor that only works for ranges in a
|
|
* Selection. The method will assert and the behavior is undefined if called
|
|
* on a range where IsInSelection() is false.
|
|
*/
|
|
nsINode* GetRegisteredCommonAncestor();
|
|
|
|
// Helper to IsNodeSelected.
|
|
static bool IsNodeInSortedRanges(nsINode* aNode,
|
|
uint32_t aStartOffset,
|
|
uint32_t aEndOffset,
|
|
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;
|
|
};
|
|
|
|
nsCOMPtr<nsIDocument> 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;
|
|
RefPtr<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 mMaySpanAnonymousSubtrees : 1;
|
|
bool mIsGenerated : 1;
|
|
bool mCalledByJS : 1;
|
|
};
|
|
|
|
inline nsISupports*
|
|
ToCanonicalSupports(nsRange* aRange)
|
|
{
|
|
return static_cast<nsIDOMRange*>(aRange);
|
|
}
|
|
|
|
inline nsISupports*
|
|
ToSupports(nsRange* aRange)
|
|
{
|
|
return static_cast<nsIDOMRange*>(aRange);
|
|
}
|
|
|
|
#endif /* nsRange_h___ */
|