зеркало из https://github.com/mozilla/gecko-dev.git
1450 строки
52 KiB
C++
1450 строки
52 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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#ifndef mozilla_EditorDOMPoint_h
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#define mozilla_EditorDOMPoint_h
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#include "mozilla/Assertions.h"
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#include "mozilla/Attributes.h"
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#include "mozilla/EditorForwards.h"
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#include "mozilla/Maybe.h"
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#include "mozilla/RangeBoundary.h"
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#include "mozilla/ToString.h"
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#include "mozilla/dom/AbstractRange.h"
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#include "mozilla/dom/Element.h"
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#include "mozilla/dom/Selection.h" // for Selection::InterlinePosition
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#include "mozilla/dom/Text.h"
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#include "nsAtom.h"
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#include "nsCOMPtr.h"
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#include "nsContentUtils.h"
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#include "nsCRT.h"
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#include "nsGkAtoms.h"
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#include "nsIContent.h"
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#include "nsINode.h"
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#include "nsStyledElement.h"
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#include <type_traits>
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namespace mozilla {
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/**
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* EditorDOMPoint and EditorRawDOMPoint are simple classes which refers
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* a point in the DOM tree at creating the instance or initializing the
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* instance with calling Set().
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*
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* EditorDOMPoint refers container node (and child node if it's already set)
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* with nsCOMPtr. EditorRawDOMPoint refers them with raw pointer.
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* So, EditorRawDOMPoint is useful when you access the nodes only before
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* changing DOM tree since increasing refcount may appear in micro benchmark
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* if it's in a hot path. On the other hand, if you need to refer them even
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* after changing DOM tree, you must use EditorDOMPoint.
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*
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* When initializing an instance only with child node or offset, the instance
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* starts to refer the child node or offset in the container. In this case,
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* the other information hasn't been initialized due to performance reason.
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* When you retrieve the other information with calling Offset() or
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* GetChild(), the other information is computed with the current DOM tree.
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* Therefore, e.g., in the following case, the other information may be
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* different:
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*
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* EditorDOMPoint pointA(container1, childNode1);
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* EditorDOMPoint pointB(container1, childNode1);
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* Unused << pointA.Offset(); // The offset is computed now.
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* container1->RemoveChild(childNode1->GetPreviousSibling());
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* Unused << pointB.Offset(); // Now, pointB.Offset() equals pointA.Offset() - 1
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*
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* similarly:
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*
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* EditorDOMPoint pointA(container1, 5);
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* EditorDOMPoint pointB(container1, 5);
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* Unused << pointA.GetChild(); // The child is computed now.
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* container1->RemoveChild(childNode1->GetFirstChild());
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* Unused << pointB.GetChild(); // Now, pointB.GetChild() equals
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* // pointA.GetChild()->GetPreviousSibling().
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*
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* So, when you initialize an instance only with one information, you need to
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* be careful when you access the other information after changing the DOM tree.
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* When you need to lock the child node or offset and recompute the other
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* information with new DOM tree, you can use
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* AutoEditorDOMPointOffsetInvalidator and AutoEditorDOMPointChildInvalidator.
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*/
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// FYI: Don't make the following instantiating macros end with `;` because
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// using them without `;`, VSCode may be confused and cause wrong red-
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// wavy underlines in the following code of the macro.
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#define NS_INSTANTIATE_EDITOR_DOM_POINT_METHOD(aResultType, aMethodName, ...) \
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template aResultType EditorDOMPoint::aMethodName(__VA_ARGS__); \
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template aResultType EditorRawDOMPoint::aMethodName(__VA_ARGS__); \
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template aResultType EditorDOMPointInText::aMethodName(__VA_ARGS__); \
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template aResultType EditorRawDOMPointInText::aMethodName(__VA_ARGS__)
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#define NS_INSTANTIATE_EDITOR_DOM_POINT_CONST_METHOD(aResultType, aMethodName, \
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...) \
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template aResultType EditorDOMPoint::aMethodName(__VA_ARGS__) const; \
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template aResultType EditorRawDOMPoint::aMethodName(__VA_ARGS__) const; \
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template aResultType EditorDOMPointInText::aMethodName(__VA_ARGS__) const; \
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template aResultType EditorRawDOMPointInText::aMethodName(__VA_ARGS__) const
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#define NS_INSTANTIATE_METHOD_RETURNING_ANY_EDITOR_DOM_POINT(aMethodName, ...) \
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template EditorDOMPoint aMethodName(__VA_ARGS__); \
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template EditorRawDOMPoint aMethodName(__VA_ARGS__); \
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template EditorDOMPointInText aMethodName(__VA_ARGS__); \
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template EditorRawDOMPointInText aMethodName(__VA_ARGS__)
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#define NS_INSTANTIATE_CONST_METHOD_RETURNING_ANY_EDITOR_DOM_POINT( \
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aMethodName, ...) \
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template EditorDOMPoint aMethodName(__VA_ARGS__) const; \
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template EditorRawDOMPoint aMethodName(__VA_ARGS__) const; \
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template EditorDOMPointInText aMethodName(__VA_ARGS__) const; \
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template EditorRawDOMPointInText aMethodName(__VA_ARGS__) const
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template <typename ParentType, typename ChildType>
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class EditorDOMPointBase final {
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typedef EditorDOMPointBase<ParentType, ChildType> SelfType;
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public:
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using InterlinePosition = dom::Selection::InterlinePosition;
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EditorDOMPointBase() = default;
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template <typename ContainerType>
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EditorDOMPointBase(
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const ContainerType* aContainer, uint32_t aOffset,
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InterlinePosition aInterlinePosition = InterlinePosition::Undefined)
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: mParent(const_cast<ContainerType*>(aContainer)),
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mChild(nullptr),
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mOffset(Some(aOffset)),
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mInterlinePosition(aInterlinePosition) {
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NS_WARNING_ASSERTION(
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!mParent || mOffset.value() <= mParent->Length(),
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"The offset is larger than the length of aContainer or negative");
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if (!mParent) {
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mOffset.reset();
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}
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}
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template <typename ContainerType, template <typename> typename StrongPtr>
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EditorDOMPointBase(
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const StrongPtr<ContainerType>& aContainer, uint32_t aOffset,
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InterlinePosition aInterlinePosition = InterlinePosition::Undefined)
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: EditorDOMPointBase(aContainer.get(), aOffset, aInterlinePosition) {}
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template <typename ContainerType, template <typename> typename StrongPtr>
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EditorDOMPointBase(
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const StrongPtr<const ContainerType>& aContainer, uint32_t aOffset,
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InterlinePosition aInterlinePosition = InterlinePosition::Undefined)
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: EditorDOMPointBase(aContainer.get(), aOffset, aInterlinePosition) {}
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/**
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* Different from RangeBoundary, aPointedNode should be a child node
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* which you want to refer.
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*/
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explicit EditorDOMPointBase(
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const nsINode* aPointedNode,
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InterlinePosition aInterlinePosition = InterlinePosition::Undefined)
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: mParent(aPointedNode && aPointedNode->IsContent()
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? aPointedNode->GetParentNode()
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: nullptr),
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mChild(aPointedNode && aPointedNode->IsContent()
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? const_cast<nsIContent*>(aPointedNode->AsContent())
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: nullptr),
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mInterlinePosition(aInterlinePosition) {
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mIsChildInitialized = aPointedNode && mChild;
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NS_WARNING_ASSERTION(IsSet(),
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"The child is nullptr or doesn't have its parent");
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NS_WARNING_ASSERTION(mChild && mChild->GetParentNode() == mParent,
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"Initializing RangeBoundary with invalid value");
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}
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EditorDOMPointBase(
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nsINode* aContainer, nsIContent* aPointedNode, uint32_t aOffset,
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InterlinePosition aInterlinePosition = InterlinePosition::Undefined)
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: mParent(aContainer),
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mChild(aPointedNode),
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mOffset(mozilla::Some(aOffset)),
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mInterlinePosition(aInterlinePosition),
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mIsChildInitialized(true) {
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MOZ_DIAGNOSTIC_ASSERT(
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aContainer, "This constructor shouldn't be used when pointing nowhere");
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MOZ_ASSERT(mOffset.value() <= mParent->Length());
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MOZ_ASSERT(mChild || mParent->Length() == mOffset.value() ||
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!mParent->IsContainerNode());
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MOZ_ASSERT(!mChild || mParent == mChild->GetParentNode());
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MOZ_ASSERT(mParent->GetChildAt_Deprecated(mOffset.value()) == mChild);
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}
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template <typename PT, typename CT>
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explicit EditorDOMPointBase(const RangeBoundaryBase<PT, CT>& aOther)
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: mParent(aOther.mParent),
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mChild(aOther.mRef ? aOther.mRef->GetNextSibling()
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: (aOther.mParent ? aOther.mParent->GetFirstChild()
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: nullptr)),
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mOffset(aOther.mOffset),
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mIsChildInitialized(aOther.mRef || (aOther.mOffset.isSome() &&
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!aOther.mOffset.value())) {}
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void SetInterlinePosition(InterlinePosition aInterlinePosition) {
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MOZ_ASSERT(IsSet());
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mInterlinePosition = aInterlinePosition;
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}
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InterlinePosition GetInterlinePosition() const {
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return IsSet() ? mInterlinePosition : InterlinePosition::Undefined;
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}
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/**
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* GetContainer() returns the container node at the point.
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* GetContainerAs*() returns the container node as specific type.
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*/
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nsINode* GetContainer() const { return mParent; }
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nsIContent* GetContainerAsContent() const {
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return nsIContent::FromNodeOrNull(mParent);
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}
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MOZ_NEVER_INLINE_DEBUG nsIContent* ContainerAsContent() const {
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MOZ_ASSERT(mParent);
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MOZ_ASSERT(mParent->IsContent());
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return mParent->AsContent();
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}
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dom::Element* GetContainerAsElement() const {
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return dom::Element::FromNodeOrNull(mParent);
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}
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MOZ_NEVER_INLINE_DEBUG dom::Element* ContainerAsElement() const {
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MOZ_ASSERT(mParent);
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MOZ_ASSERT(mParent->IsElement());
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return mParent->AsElement();
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}
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nsStyledElement* GetContainerAsStyledElement() const {
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return nsStyledElement::FromNodeOrNull(mParent);
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}
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dom::Text* GetContainerAsText() const {
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return dom::Text::FromNodeOrNull(mParent);
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}
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MOZ_NEVER_INLINE_DEBUG dom::Text* ContainerAsText() const {
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MOZ_ASSERT(mParent);
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MOZ_ASSERT(IsInTextNode());
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return mParent->AsText();
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}
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/**
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* GetContainerParent() returns parent of the container node at the point.
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*/
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nsINode* GetContainerParent() const {
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return mParent ? mParent->GetParent() : nullptr;
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}
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nsIContent* GetContainerParentAsContent() const {
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return nsIContent::FromNodeOrNull(GetContainerParent());
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}
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dom::Element* GetContainerParentAsElement() const {
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return dom::Element::FromNodeOrNull(GetContainerParent());
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}
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dom::Element* GetContainerOrContainerParentElement() const {
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if (MOZ_UNLIKELY(!mParent)) {
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return nullptr;
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}
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return mParent->IsElement() ? ContainerAsElement()
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: GetContainerParentAsElement();
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}
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/**
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* CanContainerHaveChildren() returns true if the container node can have
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* child nodes. Otherwise, e.g., when the container is a text node, returns
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* false.
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*/
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bool CanContainerHaveChildren() const {
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return mParent && mParent->IsContainerNode();
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}
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/**
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* IsContainerEmpty() returns true if it has no children or its text is empty.
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*/
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bool IsContainerEmpty() const { return mParent && !mParent->Length(); }
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/**
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* IsInContentNode() returns true if the container is a subclass of
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* nsIContent.
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*/
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bool IsInContentNode() const { return mParent && mParent->IsContent(); }
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/**
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* IsInDataNode() returns true if the container node is a data node including
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* text node.
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*/
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bool IsInDataNode() const { return mParent && mParent->IsCharacterData(); }
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/**
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* IsInTextNode() returns true if the container node is a text node.
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*/
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bool IsInTextNode() const { return mParent && mParent->IsText(); }
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/**
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* IsInNativeAnonymousSubtree() returns true if the container is in
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* native anonymous subtree.
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*/
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bool IsInNativeAnonymousSubtree() const {
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return mParent && mParent->IsInNativeAnonymousSubtree();
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}
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/**
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* IsContainerHTMLElement() returns true if the container node is an HTML
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* element node and its node name is aTag.
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*/
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bool IsContainerHTMLElement(nsAtom* aTag) const {
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return mParent && mParent->IsHTMLElement(aTag);
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}
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/**
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* IsContainerAnyOfHTMLElements() returns true if the container node is an
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* HTML element node and its node name is one of the arguments.
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*/
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template <typename First, typename... Args>
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bool IsContainerAnyOfHTMLElements(First aFirst, Args... aArgs) const {
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return mParent && mParent->IsAnyOfHTMLElements(aFirst, aArgs...);
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}
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/**
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* GetChild() returns a child node which is pointed by the instance.
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* If mChild hasn't been initialized yet, this computes the child node
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* from mParent and mOffset with *current* DOM tree.
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*/
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nsIContent* GetChild() const {
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if (!mParent || !mParent->IsContainerNode()) {
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return nullptr;
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}
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if (mIsChildInitialized) {
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return mChild;
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}
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// Fix child node now.
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const_cast<SelfType*>(this)->EnsureChild();
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return mChild;
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}
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/**
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* GetCurrentChildAtOffset() returns current child at mOffset.
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* I.e., mOffset needs to be fixed before calling this.
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*/
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nsIContent* GetCurrentChildAtOffset() const {
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MOZ_ASSERT(mOffset.isSome());
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if (mOffset.isNothing()) {
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return GetChild();
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}
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return mParent ? mParent->GetChildAt_Deprecated(*mOffset) : nullptr;
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}
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/**
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* GetChildOrContainerIfDataNode() returns the child content node,
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* or container content node if the container is a data node.
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*/
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nsIContent* GetChildOrContainerIfDataNode() const {
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if (IsInDataNode()) {
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return ContainerAsContent();
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}
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return GetChild();
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}
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/**
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* GetNextSiblingOfChild() returns next sibling of the child node.
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* If this refers after the last child or the container cannot have children,
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* this returns nullptr with warning.
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* If mChild hasn't been initialized yet, this computes the child node
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* from mParent and mOffset with *current* DOM tree.
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*/
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nsIContent* GetNextSiblingOfChild() const {
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if (NS_WARN_IF(!mParent) || NS_WARN_IF(!mParent->IsContainerNode())) {
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return nullptr;
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}
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if (mIsChildInitialized) {
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return mChild ? mChild->GetNextSibling() : nullptr;
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}
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MOZ_ASSERT(mOffset.isSome());
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if (NS_WARN_IF(mOffset.value() > mParent->Length())) {
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// If this has been set only offset and now the offset is invalid,
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// let's just return nullptr.
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return nullptr;
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}
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// Fix child node now.
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const_cast<SelfType*>(this)->EnsureChild();
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return mChild ? mChild->GetNextSibling() : nullptr;
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}
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/**
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* GetPreviousSiblingOfChild() returns previous sibling of a child
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* at offset. If this refers the first child or the container cannot have
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* children, this returns nullptr with warning.
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* If mChild hasn't been initialized yet, this computes the child node
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* from mParent and mOffset with *current* DOM tree.
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*/
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nsIContent* GetPreviousSiblingOfChild() const {
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if (NS_WARN_IF(!mParent) || NS_WARN_IF(!mParent->IsContainerNode())) {
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return nullptr;
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}
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if (mIsChildInitialized) {
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return mChild ? mChild->GetPreviousSibling() : mParent->GetLastChild();
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}
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MOZ_ASSERT(mOffset.isSome());
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if (NS_WARN_IF(mOffset.value() > mParent->Length())) {
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// If this has been set only offset and now the offset is invalid,
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// let's just return nullptr.
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return nullptr;
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}
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// Fix child node now.
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const_cast<SelfType*>(this)->EnsureChild();
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return mChild ? mChild->GetPreviousSibling() : mParent->GetLastChild();
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}
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/**
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* Simple accessors of the character in dom::Text so that when you call
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* these methods, you need to guarantee that the container is a dom::Text.
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*/
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MOZ_NEVER_INLINE_DEBUG char16_t Char() const {
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MOZ_ASSERT(IsSetAndValid());
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MOZ_ASSERT(!IsEndOfContainer());
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return ContainerAsText()->TextFragment().CharAt(mOffset.value());
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}
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MOZ_NEVER_INLINE_DEBUG bool IsCharASCIISpace() const {
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return nsCRT::IsAsciiSpace(Char());
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}
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MOZ_NEVER_INLINE_DEBUG bool IsCharNBSP() const { return Char() == 0x00A0; }
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MOZ_NEVER_INLINE_DEBUG bool IsCharASCIISpaceOrNBSP() const {
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char16_t ch = Char();
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return nsCRT::IsAsciiSpace(ch) || ch == 0x00A0;
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}
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MOZ_NEVER_INLINE_DEBUG bool IsCharNewLine() const { return Char() == '\n'; }
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MOZ_NEVER_INLINE_DEBUG bool IsCharPreformattedNewLine() const;
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MOZ_NEVER_INLINE_DEBUG bool
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IsCharPreformattedNewLineCollapsedWithWhiteSpaces() const;
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/**
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* IsCharCollapsibleASCIISpace(), IsCharCollapsibleNBSP() and
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* IsCharCollapsibleASCIISpaceOrNBSP() checks whether the white-space is
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* preformatted or collapsible with the style of the container text node
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* without flushing pending notifications.
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*/
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bool IsCharCollapsibleASCIISpace() const;
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bool IsCharCollapsibleNBSP() const;
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bool IsCharCollapsibleASCIISpaceOrNBSP() const;
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MOZ_NEVER_INLINE_DEBUG bool IsCharHighSurrogateFollowedByLowSurrogate()
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const {
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MOZ_ASSERT(IsSetAndValid());
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MOZ_ASSERT(!IsEndOfContainer());
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return ContainerAsText()
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->TextFragment()
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.IsHighSurrogateFollowedByLowSurrogateAt(mOffset.value());
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}
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MOZ_NEVER_INLINE_DEBUG bool IsCharLowSurrogateFollowingHighSurrogate() const {
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MOZ_ASSERT(IsSetAndValid());
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MOZ_ASSERT(!IsEndOfContainer());
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return ContainerAsText()
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->TextFragment()
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.IsLowSurrogateFollowingHighSurrogateAt(mOffset.value());
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}
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MOZ_NEVER_INLINE_DEBUG char16_t PreviousChar() const {
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MOZ_ASSERT(IsSetAndValid());
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MOZ_ASSERT(!IsStartOfContainer());
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return ContainerAsText()->TextFragment().CharAt(mOffset.value() - 1);
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}
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MOZ_NEVER_INLINE_DEBUG bool IsPreviousCharASCIISpace() const {
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return nsCRT::IsAsciiSpace(PreviousChar());
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}
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MOZ_NEVER_INLINE_DEBUG bool IsPreviousCharNBSP() const {
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return PreviousChar() == 0x00A0;
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}
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MOZ_NEVER_INLINE_DEBUG bool IsPreviousCharASCIISpaceOrNBSP() const {
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char16_t ch = PreviousChar();
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return nsCRT::IsAsciiSpace(ch) || ch == 0x00A0;
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}
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MOZ_NEVER_INLINE_DEBUG bool IsPreviousCharNewLine() const {
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return PreviousChar() == '\n';
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}
|
|
MOZ_NEVER_INLINE_DEBUG bool IsPreviousCharPreformattedNewLine() const;
|
|
MOZ_NEVER_INLINE_DEBUG bool
|
|
IsPreviousCharPreformattedNewLineCollapsedWithWhiteSpaces() const;
|
|
/**
|
|
* IsPreviousCharCollapsibleASCIISpace(), IsPreviousCharCollapsibleNBSP() and
|
|
* IsPreviousCharCollapsibleASCIISpaceOrNBSP() checks whether the white-space
|
|
* is preformatted or collapsible with the style of the container text node
|
|
* without flushing pending notifications.
|
|
*/
|
|
bool IsPreviousCharCollapsibleASCIISpace() const;
|
|
bool IsPreviousCharCollapsibleNBSP() const;
|
|
bool IsPreviousCharCollapsibleASCIISpaceOrNBSP() const;
|
|
|
|
MOZ_NEVER_INLINE_DEBUG char16_t NextChar() const {
|
|
MOZ_ASSERT(IsSetAndValid());
|
|
MOZ_ASSERT(!IsAtLastContent() && !IsEndOfContainer());
|
|
return ContainerAsText()->TextFragment().CharAt(mOffset.value() + 1);
|
|
}
|
|
MOZ_NEVER_INLINE_DEBUG bool IsNextCharASCIISpace() const {
|
|
return nsCRT::IsAsciiSpace(NextChar());
|
|
}
|
|
MOZ_NEVER_INLINE_DEBUG bool IsNextCharNBSP() const {
|
|
return NextChar() == 0x00A0;
|
|
}
|
|
MOZ_NEVER_INLINE_DEBUG bool IsNextCharASCIISpaceOrNBSP() const {
|
|
char16_t ch = NextChar();
|
|
return nsCRT::IsAsciiSpace(ch) || ch == 0x00A0;
|
|
}
|
|
MOZ_NEVER_INLINE_DEBUG bool IsNextCharNewLine() const {
|
|
return NextChar() == '\n';
|
|
}
|
|
MOZ_NEVER_INLINE_DEBUG bool IsNextCharPreformattedNewLine() const;
|
|
MOZ_NEVER_INLINE_DEBUG bool
|
|
IsNextCharPreformattedNewLineCollapsedWithWhiteSpaces() const;
|
|
/**
|
|
* IsNextCharCollapsibleASCIISpace(), IsNextCharCollapsibleNBSP() and
|
|
* IsNextCharCollapsibleASCIISpaceOrNBSP() checks whether the white-space is
|
|
* preformatted or collapsible with the style of the container text node
|
|
* without flushing pending notifications.
|
|
*/
|
|
bool IsNextCharCollapsibleASCIISpace() const;
|
|
bool IsNextCharCollapsibleNBSP() const;
|
|
bool IsNextCharCollapsibleASCIISpaceOrNBSP() const;
|
|
|
|
uint32_t Offset() const {
|
|
if (mOffset.isSome()) {
|
|
MOZ_ASSERT(mOffset.isSome());
|
|
return mOffset.value();
|
|
}
|
|
if (MOZ_UNLIKELY(!mParent)) {
|
|
MOZ_ASSERT(!mChild);
|
|
return 0u;
|
|
}
|
|
MOZ_ASSERT(mParent->IsContainerNode(),
|
|
"If the container cannot have children, mOffset.isSome() should "
|
|
"be true");
|
|
if (!mChild) {
|
|
// We're referring after the last child. Fix offset now.
|
|
const_cast<SelfType*>(this)->mOffset = mozilla::Some(mParent->Length());
|
|
return mOffset.value();
|
|
}
|
|
MOZ_ASSERT(mChild->GetParentNode() == mParent);
|
|
// Fix offset now.
|
|
if (mChild == mParent->GetFirstChild()) {
|
|
const_cast<SelfType*>(this)->mOffset = mozilla::Some(0u);
|
|
return 0u;
|
|
}
|
|
const_cast<SelfType*>(this)->mOffset = mParent->ComputeIndexOf(mChild);
|
|
MOZ_DIAGNOSTIC_ASSERT(mOffset.isSome());
|
|
return mOffset.valueOr(0u); // Avoid crash in Release/Beta
|
|
}
|
|
|
|
/**
|
|
* Set() sets a point to aOffset or aChild.
|
|
* If it's set with aOffset, mChild is invalidated. If it's set with aChild,
|
|
* mOffset may be invalidated.
|
|
*/
|
|
template <typename ContainerType>
|
|
void Set(ContainerType* aContainer, uint32_t aOffset) {
|
|
mParent = aContainer;
|
|
mChild = nullptr;
|
|
mOffset = mozilla::Some(aOffset);
|
|
mIsChildInitialized = false;
|
|
mInterlinePosition = InterlinePosition::Undefined;
|
|
NS_ASSERTION(!mParent || mOffset.value() <= mParent->Length(),
|
|
"The offset is out of bounds");
|
|
}
|
|
template <typename ContainerType, template <typename> typename StrongPtr>
|
|
void Set(const StrongPtr<ContainerType>& aContainer, uint32_t aOffset) {
|
|
Set(aContainer.get(), aOffset);
|
|
}
|
|
void Set(const nsINode* aChild) {
|
|
MOZ_ASSERT(aChild);
|
|
if (NS_WARN_IF(!aChild->IsContent())) {
|
|
Clear();
|
|
return;
|
|
}
|
|
mParent = aChild->GetParentNode();
|
|
mChild = const_cast<nsIContent*>(aChild->AsContent());
|
|
mOffset.reset();
|
|
mIsChildInitialized = true;
|
|
mInterlinePosition = InterlinePosition::Undefined;
|
|
}
|
|
|
|
/**
|
|
* SetToEndOf() sets this to the end of aContainer. Then, mChild is always
|
|
* nullptr but marked as initialized and mOffset is always set.
|
|
*/
|
|
template <typename ContainerType>
|
|
MOZ_NEVER_INLINE_DEBUG void SetToEndOf(const ContainerType* aContainer) {
|
|
MOZ_ASSERT(aContainer);
|
|
mParent = const_cast<ContainerType*>(aContainer);
|
|
mChild = nullptr;
|
|
mOffset = mozilla::Some(mParent->Length());
|
|
mIsChildInitialized = true;
|
|
mInterlinePosition = InterlinePosition::Undefined;
|
|
}
|
|
template <typename ContainerType, template <typename> typename StrongPtr>
|
|
MOZ_NEVER_INLINE_DEBUG void SetToEndOf(
|
|
const StrongPtr<ContainerType>& aContainer) {
|
|
SetToEndOf(aContainer.get());
|
|
}
|
|
template <typename ContainerType>
|
|
MOZ_NEVER_INLINE_DEBUG static SelfType AtEndOf(
|
|
const ContainerType& aContainer,
|
|
InterlinePosition aInterlinePosition = InterlinePosition::Undefined) {
|
|
SelfType point;
|
|
point.SetToEndOf(&aContainer);
|
|
point.mInterlinePosition = aInterlinePosition;
|
|
return point;
|
|
}
|
|
template <typename ContainerType, template <typename> typename StrongPtr>
|
|
MOZ_NEVER_INLINE_DEBUG static SelfType AtEndOf(
|
|
const StrongPtr<ContainerType>& aContainer,
|
|
InterlinePosition aInterlinePosition = InterlinePosition::Undefined) {
|
|
MOZ_ASSERT(aContainer.get());
|
|
return AtEndOf(*aContainer.get(), aInterlinePosition);
|
|
}
|
|
|
|
/**
|
|
* SetAfter() sets mChild to next sibling of aChild.
|
|
*/
|
|
void SetAfter(const nsINode* aChild) {
|
|
MOZ_ASSERT(aChild);
|
|
nsIContent* nextSibling = aChild->GetNextSibling();
|
|
if (nextSibling) {
|
|
Set(nextSibling);
|
|
return;
|
|
}
|
|
nsINode* parentNode = aChild->GetParentNode();
|
|
if (NS_WARN_IF(!parentNode)) {
|
|
Clear();
|
|
return;
|
|
}
|
|
SetToEndOf(parentNode);
|
|
}
|
|
template <typename ContainerType>
|
|
static SelfType After(
|
|
const ContainerType& aContainer,
|
|
InterlinePosition aInterlinePosition = InterlinePosition::Undefined) {
|
|
SelfType point;
|
|
point.SetAfter(&aContainer);
|
|
point.mInterlinePosition = aInterlinePosition;
|
|
return point;
|
|
}
|
|
template <typename ContainerType, template <typename> typename StrongPtr>
|
|
MOZ_NEVER_INLINE_DEBUG static SelfType After(
|
|
const StrongPtr<ContainerType>& aContainer,
|
|
InterlinePosition aInterlinePosition = InterlinePosition::Undefined) {
|
|
MOZ_ASSERT(aContainer.get());
|
|
return After(*aContainer.get(), aInterlinePosition);
|
|
}
|
|
template <typename PT, typename CT>
|
|
MOZ_NEVER_INLINE_DEBUG static SelfType After(
|
|
const EditorDOMPointBase<PT, CT>& aPoint,
|
|
InterlinePosition aInterlinePosition = InterlinePosition::Undefined) {
|
|
MOZ_ASSERT(aPoint.IsSet());
|
|
if (aPoint.mChild) {
|
|
return After(*aPoint.mChild, aInterlinePosition);
|
|
}
|
|
if (NS_WARN_IF(aPoint.IsEndOfContainer())) {
|
|
return SelfType();
|
|
}
|
|
auto point = aPoint.NextPoint().template To<SelfType>();
|
|
point.mInterlinePosition = aInterlinePosition;
|
|
return point;
|
|
}
|
|
|
|
/**
|
|
* ParentPoint() returns a point whose child is the container.
|
|
*/
|
|
template <typename EditorDOMPointType = SelfType>
|
|
EditorDOMPointType ParentPoint() const {
|
|
MOZ_ASSERT(mParent);
|
|
if (MOZ_UNLIKELY(!mParent) || !mParent->IsContent()) {
|
|
return EditorDOMPointType();
|
|
}
|
|
return EditorDOMPointType(ContainerAsContent());
|
|
}
|
|
|
|
/**
|
|
* NextPoint() and PreviousPoint() returns next/previous DOM point in
|
|
* the container.
|
|
*/
|
|
template <typename EditorDOMPointType = SelfType>
|
|
EditorDOMPointType NextPoint() const {
|
|
NS_ASSERTION(!IsEndOfContainer(), "Should not be at end of the container");
|
|
auto result = this->template To<EditorDOMPointType>();
|
|
result.AdvanceOffset();
|
|
return result;
|
|
}
|
|
template <typename EditorDOMPointType = SelfType>
|
|
EditorDOMPointType PreviousPoint() const {
|
|
NS_ASSERTION(!IsStartOfContainer(),
|
|
"Should not be at start of the container");
|
|
EditorDOMPointType result = this->template To<EditorDOMPointType>();
|
|
result.RewindOffset();
|
|
return result;
|
|
}
|
|
|
|
/**
|
|
* Clear() makes the instance not point anywhere.
|
|
*/
|
|
void Clear() {
|
|
mParent = nullptr;
|
|
mChild = nullptr;
|
|
mOffset.reset();
|
|
mIsChildInitialized = false;
|
|
mInterlinePosition = InterlinePosition::Undefined;
|
|
}
|
|
|
|
/**
|
|
* AdvanceOffset() tries to refer next sibling of mChild and/of next offset.
|
|
* If the container can have children and there is no next sibling or the
|
|
* offset reached the length of the container, this outputs warning and does
|
|
* nothing. So, callers need to check if there is next sibling which you
|
|
* need to refer.
|
|
*
|
|
* @return true if there is a next DOM point to refer.
|
|
*/
|
|
bool AdvanceOffset() {
|
|
if (NS_WARN_IF(!mParent)) {
|
|
return false;
|
|
}
|
|
// If only mOffset is available, just compute the offset.
|
|
if ((mOffset.isSome() && !mIsChildInitialized) ||
|
|
!mParent->IsContainerNode()) {
|
|
MOZ_ASSERT(mOffset.isSome());
|
|
MOZ_ASSERT(!mChild);
|
|
if (NS_WARN_IF(mOffset.value() >= mParent->Length())) {
|
|
// We're already referring the start of the container.
|
|
return false;
|
|
}
|
|
mOffset = mozilla::Some(mOffset.value() + 1);
|
|
mInterlinePosition = InterlinePosition::Undefined;
|
|
return true;
|
|
}
|
|
|
|
MOZ_ASSERT(mIsChildInitialized);
|
|
MOZ_ASSERT(!mOffset.isSome() || mOffset.isSome());
|
|
if (NS_WARN_IF(!mParent->HasChildren()) || NS_WARN_IF(!mChild) ||
|
|
NS_WARN_IF(mOffset.isSome() && mOffset.value() >= mParent->Length())) {
|
|
// We're already referring the end of the container (or outside).
|
|
return false;
|
|
}
|
|
|
|
if (mOffset.isSome()) {
|
|
MOZ_ASSERT(mOffset.isSome());
|
|
mOffset = mozilla::Some(mOffset.value() + 1);
|
|
}
|
|
mChild = mChild->GetNextSibling();
|
|
mInterlinePosition = InterlinePosition::Undefined;
|
|
return true;
|
|
}
|
|
|
|
/**
|
|
* RewindOffset() tries to refer previous sibling of mChild and/or previous
|
|
* offset. If the container can have children and there is no next previous
|
|
* or the offset is 0, this outputs warning and does nothing. So, callers
|
|
* need to check if there is previous sibling which you need to refer.
|
|
*
|
|
* @return true if there is a previous DOM point to refer.
|
|
*/
|
|
bool RewindOffset() {
|
|
if (NS_WARN_IF(!mParent)) {
|
|
return false;
|
|
}
|
|
// If only mOffset is available, just compute the offset.
|
|
if ((mOffset.isSome() && !mIsChildInitialized) ||
|
|
!mParent->IsContainerNode()) {
|
|
MOZ_ASSERT(mOffset.isSome());
|
|
MOZ_ASSERT(!mChild);
|
|
if (NS_WARN_IF(!mOffset.value()) ||
|
|
NS_WARN_IF(mOffset.value() > mParent->Length())) {
|
|
// We're already referring the start of the container or
|
|
// the offset is invalid since perhaps, the offset was set before
|
|
// the last DOM tree change.
|
|
NS_ASSERTION(false, "Failed to rewind offset");
|
|
return false;
|
|
}
|
|
mOffset = mozilla::Some(mOffset.value() - 1);
|
|
mInterlinePosition = InterlinePosition::Undefined;
|
|
return true;
|
|
}
|
|
|
|
MOZ_ASSERT(mIsChildInitialized);
|
|
MOZ_ASSERT(!mOffset.isSome() || mOffset.isSome());
|
|
if (NS_WARN_IF(!mParent->HasChildren()) ||
|
|
NS_WARN_IF(mChild && !mChild->GetPreviousSibling()) ||
|
|
NS_WARN_IF(mOffset.isSome() && !mOffset.value())) {
|
|
// We're already referring the start of the container (or the child has
|
|
// been moved from the container?).
|
|
return false;
|
|
}
|
|
|
|
nsIContent* previousSibling =
|
|
mChild ? mChild->GetPreviousSibling() : mParent->GetLastChild();
|
|
if (NS_WARN_IF(!previousSibling)) {
|
|
// We're already referring the first child of the container.
|
|
return false;
|
|
}
|
|
|
|
if (mOffset.isSome()) {
|
|
mOffset = mozilla::Some(mOffset.value() - 1);
|
|
}
|
|
mChild = previousSibling;
|
|
mInterlinePosition = InterlinePosition::Undefined;
|
|
return true;
|
|
}
|
|
|
|
/**
|
|
* GetNonAnonymousSubtreePoint() returns a DOM point which is NOT in
|
|
* native-anonymous subtree. If the instance isn't in native-anonymous
|
|
* subtree, this returns same point. Otherwise, climbs up until finding
|
|
* non-native-anonymous parent and returns the point of it. I.e.,
|
|
* container is parent of the found non-anonymous-native node.
|
|
*/
|
|
template <typename EditorDOMPointType>
|
|
EditorDOMPointType GetNonAnonymousSubtreePoint() const {
|
|
if (NS_WARN_IF(!IsSet())) {
|
|
return EditorDOMPointType();
|
|
}
|
|
if (!IsInNativeAnonymousSubtree()) {
|
|
return this->template To<EditorDOMPointType>();
|
|
}
|
|
nsINode* parent;
|
|
for (parent = mParent->GetParentNode();
|
|
parent && parent->IsInNativeAnonymousSubtree();
|
|
parent = parent->GetParentNode()) {
|
|
}
|
|
if (!parent) {
|
|
return EditorDOMPointType();
|
|
}
|
|
return EditorDOMPointType(parent);
|
|
}
|
|
|
|
bool IsSet() const {
|
|
return mParent && (mIsChildInitialized || mOffset.isSome());
|
|
}
|
|
|
|
bool IsSetAndValid() const {
|
|
if (!IsSet()) {
|
|
return false;
|
|
}
|
|
|
|
if (mChild &&
|
|
(mChild->GetParentNode() != mParent || mChild->IsBeingRemoved())) {
|
|
return false;
|
|
}
|
|
if (mOffset.isSome() && mOffset.value() > mParent->Length()) {
|
|
return false;
|
|
}
|
|
return true;
|
|
}
|
|
|
|
bool HasChildMovedFromContainer() const {
|
|
return mChild && mChild->GetParentNode() != mParent;
|
|
}
|
|
|
|
bool IsStartOfContainer() const {
|
|
// If we're referring the first point in the container:
|
|
// If mParent is not a container like a text node, mOffset is 0.
|
|
// If mChild is initialized and it's first child of mParent.
|
|
// If mChild isn't initialized and the offset is 0.
|
|
if (NS_WARN_IF(!mParent)) {
|
|
return false;
|
|
}
|
|
if (!mParent->IsContainerNode()) {
|
|
return !mOffset.value();
|
|
}
|
|
if (mIsChildInitialized) {
|
|
if (mParent->GetFirstChild() == mChild) {
|
|
NS_WARNING_ASSERTION(!mOffset.isSome() || !mOffset.value(),
|
|
"If mOffset was initialized, it should be 0");
|
|
return true;
|
|
}
|
|
NS_WARNING_ASSERTION(!mOffset.isSome() || mParent->GetChildAt_Deprecated(
|
|
mOffset.value()) == mChild,
|
|
"mOffset and mChild are mismatched");
|
|
return false;
|
|
}
|
|
MOZ_ASSERT(mOffset.isSome());
|
|
return !mOffset.value();
|
|
}
|
|
|
|
bool IsEndOfContainer() const {
|
|
// If we're referring after the last point of the container:
|
|
// If mParent is not a container like text node, mOffset is same as the
|
|
// length of the container.
|
|
// If mChild is initialized and it's nullptr.
|
|
// If mChild isn't initialized and mOffset is same as the length of the
|
|
// container.
|
|
if (NS_WARN_IF(!mParent)) {
|
|
return false;
|
|
}
|
|
if (!mParent->IsContainerNode()) {
|
|
return mOffset.value() == mParent->Length();
|
|
}
|
|
if (mIsChildInitialized) {
|
|
if (!mChild) {
|
|
NS_WARNING_ASSERTION(
|
|
!mOffset.isSome() || mOffset.value() == mParent->Length(),
|
|
"If mOffset was initialized, it should be length of the container");
|
|
return true;
|
|
}
|
|
NS_WARNING_ASSERTION(!mOffset.isSome() || mParent->GetChildAt_Deprecated(
|
|
mOffset.value()) == mChild,
|
|
"mOffset and mChild are mismatched");
|
|
return false;
|
|
}
|
|
MOZ_ASSERT(mOffset.isSome());
|
|
return mOffset.value() == mParent->Length();
|
|
}
|
|
|
|
/**
|
|
* IsAtLastContent() returns true when it refers last child of the container
|
|
* or last character offset of text node.
|
|
*/
|
|
bool IsAtLastContent() const {
|
|
if (NS_WARN_IF(!mParent)) {
|
|
return false;
|
|
}
|
|
if (mParent->IsContainerNode() && mOffset.isSome()) {
|
|
return mOffset.value() == mParent->Length() - 1;
|
|
}
|
|
if (mIsChildInitialized) {
|
|
if (mChild && mChild == mParent->GetLastChild()) {
|
|
NS_WARNING_ASSERTION(
|
|
!mOffset.isSome() || mOffset.value() == mParent->Length() - 1,
|
|
"If mOffset was initialized, it should be length - 1 of the "
|
|
"container");
|
|
return true;
|
|
}
|
|
NS_WARNING_ASSERTION(!mOffset.isSome() || mParent->GetChildAt_Deprecated(
|
|
mOffset.value()) == mChild,
|
|
"mOffset and mChild are mismatched");
|
|
return false;
|
|
}
|
|
MOZ_ASSERT(mOffset.isSome());
|
|
return mOffset.value() == mParent->Length() - 1;
|
|
}
|
|
|
|
bool IsBRElementAtEndOfContainer() const {
|
|
if (NS_WARN_IF(!mParent)) {
|
|
return false;
|
|
}
|
|
if (!mParent->IsContainerNode()) {
|
|
return false;
|
|
}
|
|
const_cast<SelfType*>(this)->EnsureChild();
|
|
if (!mChild || mChild->GetNextSibling()) {
|
|
return false;
|
|
}
|
|
return mChild->IsHTMLElement(nsGkAtoms::br);
|
|
}
|
|
|
|
template <typename A, typename B>
|
|
EditorDOMPointBase& operator=(const RangeBoundaryBase<A, B>& aOther) {
|
|
mParent = aOther.mParent;
|
|
mChild = aOther.mRef ? aOther.mRef->GetNextSibling()
|
|
: (aOther.mParent && aOther.mParent->IsContainerNode()
|
|
? aOther.mParent->GetFirstChild()
|
|
: nullptr);
|
|
mOffset = aOther.mOffset;
|
|
mIsChildInitialized =
|
|
aOther.mRef || (aOther.mParent && !aOther.mParent->IsContainerNode()) ||
|
|
(aOther.mOffset.isSome() && !aOther.mOffset.value());
|
|
mInterlinePosition = InterlinePosition::Undefined;
|
|
return *this;
|
|
}
|
|
|
|
template <typename EditorDOMPointType>
|
|
constexpr EditorDOMPointType To() const {
|
|
// XXX Cannot specialize this method due to implicit instantiatation caused
|
|
// by the inline CC functions below.
|
|
if (std::is_same<SelfType, EditorDOMPointType>::value) {
|
|
return reinterpret_cast<const EditorDOMPointType&>(*this);
|
|
}
|
|
EditorDOMPointType result;
|
|
result.mParent = mParent;
|
|
result.mChild = mChild;
|
|
result.mOffset = mOffset;
|
|
result.mIsChildInitialized = mIsChildInitialized;
|
|
result.mInterlinePosition = mInterlinePosition;
|
|
return result;
|
|
}
|
|
|
|
/**
|
|
* Don't compare mInterlinePosition. If it's required to check, perhaps,
|
|
* another compare operator like `===` should be created.
|
|
*/
|
|
template <typename A, typename B>
|
|
bool operator==(const EditorDOMPointBase<A, B>& aOther) const {
|
|
if (mParent != aOther.mParent) {
|
|
return false;
|
|
}
|
|
|
|
if (mOffset.isSome() && aOther.mOffset.isSome()) {
|
|
// If both mOffset are set, we need to compare both mRef too because
|
|
// the relation of mRef and mOffset have already broken by DOM tree
|
|
// changes.
|
|
if (mOffset != aOther.mOffset) {
|
|
return false;
|
|
}
|
|
if (mChild == aOther.mChild) {
|
|
return true;
|
|
}
|
|
if (NS_WARN_IF(mIsChildInitialized && aOther.mIsChildInitialized)) {
|
|
// In this case, relation between mChild and mOffset of one of or both
|
|
// of them doesn't match with current DOM tree since the DOM tree might
|
|
// have been changed after computing mChild or mOffset.
|
|
return false;
|
|
}
|
|
// If one of mChild hasn't been computed yet, we should compare them only
|
|
// with mOffset. Perhaps, we shouldn't copy mChild from non-nullptr one
|
|
// to the other since if we copy it here, it may be unexpected behavior
|
|
// for some callers.
|
|
return true;
|
|
}
|
|
|
|
MOZ_ASSERT(mIsChildInitialized || aOther.mIsChildInitialized);
|
|
|
|
if (mOffset.isSome() && !mIsChildInitialized && !aOther.mOffset.isSome() &&
|
|
aOther.mIsChildInitialized) {
|
|
// If this has only mOffset and the other has only mChild, this needs to
|
|
// compute mChild now.
|
|
const_cast<SelfType*>(this)->EnsureChild();
|
|
return mChild == aOther.mChild;
|
|
}
|
|
|
|
if (!mOffset.isSome() && mIsChildInitialized && aOther.mOffset.isSome() &&
|
|
!aOther.mIsChildInitialized) {
|
|
// If this has only mChild and the other has only mOffset, the other needs
|
|
// to compute mChild now.
|
|
const_cast<EditorDOMPointBase<A, B>&>(aOther).EnsureChild();
|
|
return mChild == aOther.mChild;
|
|
}
|
|
|
|
// If mOffset of one of them hasn't been computed from mChild yet, we should
|
|
// compare only with mChild. Perhaps, we shouldn't copy mOffset from being
|
|
// some one to not being some one since if we copy it here, it may be
|
|
// unexpected behavior for some callers.
|
|
return mChild == aOther.mChild;
|
|
}
|
|
|
|
template <typename A, typename B>
|
|
bool operator==(const RangeBoundaryBase<A, B>& aOther) const {
|
|
// TODO: Optimize this with directly comparing with RangeBoundaryBase
|
|
// members.
|
|
return *this == SelfType(aOther);
|
|
}
|
|
|
|
template <typename A, typename B>
|
|
bool operator!=(const EditorDOMPointBase<A, B>& aOther) const {
|
|
return !(*this == aOther);
|
|
}
|
|
|
|
template <typename A, typename B>
|
|
bool operator!=(const RangeBoundaryBase<A, B>& aOther) const {
|
|
return !(*this == aOther);
|
|
}
|
|
|
|
/**
|
|
* This operator should be used if API of other modules take RawRangeBoundary,
|
|
* e.g., methods of Selection and nsRange.
|
|
*/
|
|
operator const RawRangeBoundary() const { return ToRawRangeBoundary(); }
|
|
const RawRangeBoundary ToRawRangeBoundary() const {
|
|
if (!IsSet() || NS_WARN_IF(!mIsChildInitialized && !mOffset.isSome())) {
|
|
return RawRangeBoundary();
|
|
}
|
|
if (!mParent->IsContainerNode()) {
|
|
MOZ_ASSERT(mOffset.value() <= mParent->Length());
|
|
// If the container is a data node like a text node, we need to create
|
|
// RangeBoundaryBase instance only with mOffset because mChild is always
|
|
// nullptr.
|
|
return RawRangeBoundary(mParent, mOffset.value());
|
|
}
|
|
if (mIsChildInitialized && mOffset.isSome()) {
|
|
// If we've already set both child and offset, we should create
|
|
// RangeBoundary with offset after validation.
|
|
#ifdef DEBUG
|
|
if (mChild) {
|
|
MOZ_ASSERT(mParent == mChild->GetParentNode());
|
|
MOZ_ASSERT(mParent->GetChildAt_Deprecated(mOffset.value()) == mChild);
|
|
} else {
|
|
MOZ_ASSERT(mParent->Length() == mOffset.value());
|
|
}
|
|
#endif // #ifdef DEBUG
|
|
return RawRangeBoundary(mParent, mOffset.value());
|
|
}
|
|
// Otherwise, we should create RangeBoundaryBase only with available
|
|
// information.
|
|
if (mOffset.isSome()) {
|
|
return RawRangeBoundary(mParent, mOffset.value());
|
|
}
|
|
if (mChild) {
|
|
return RawRangeBoundary(mParent, mChild->GetPreviousSibling());
|
|
}
|
|
return RawRangeBoundary(mParent, mParent->GetLastChild());
|
|
}
|
|
|
|
EditorDOMPointInText GetAsInText() const {
|
|
return IsInTextNode() ? EditorDOMPointInText(ContainerAsText(), Offset(),
|
|
mInterlinePosition)
|
|
: EditorDOMPointInText();
|
|
}
|
|
MOZ_NEVER_INLINE_DEBUG EditorDOMPointInText AsInText() const {
|
|
MOZ_ASSERT(IsInTextNode());
|
|
return EditorDOMPointInText(ContainerAsText(), Offset(),
|
|
mInterlinePosition);
|
|
}
|
|
|
|
template <typename A, typename B>
|
|
bool IsBefore(const EditorDOMPointBase<A, B>& aOther) const {
|
|
if (!IsSetAndValid() || !aOther.IsSetAndValid()) {
|
|
return false;
|
|
}
|
|
Maybe<int32_t> comp = nsContentUtils::ComparePoints(
|
|
ToRawRangeBoundary(), aOther.ToRawRangeBoundary());
|
|
return comp.isSome() && comp.value() == -1;
|
|
}
|
|
|
|
template <typename A, typename B>
|
|
bool EqualsOrIsBefore(const EditorDOMPointBase<A, B>& aOther) const {
|
|
if (!IsSetAndValid() || !aOther.IsSetAndValid()) {
|
|
return false;
|
|
}
|
|
Maybe<int32_t> comp = nsContentUtils::ComparePoints(
|
|
ToRawRangeBoundary(), aOther.ToRawRangeBoundary());
|
|
return comp.isSome() && comp.value() <= 0;
|
|
}
|
|
|
|
friend std::ostream& operator<<(std::ostream& aStream,
|
|
const SelfType& aDOMPoint) {
|
|
aStream << "{ mParent=" << aDOMPoint.mParent.get();
|
|
if (aDOMPoint.mParent) {
|
|
aStream << " (" << *aDOMPoint.mParent
|
|
<< ", Length()=" << aDOMPoint.mParent->Length() << ")";
|
|
}
|
|
aStream << ", mChild=" << aDOMPoint.mChild.get();
|
|
if (aDOMPoint.mChild) {
|
|
aStream << " (" << *aDOMPoint.mChild << ")";
|
|
}
|
|
aStream << ", mOffset=" << aDOMPoint.mOffset << ", mIsChildInitialized="
|
|
<< (aDOMPoint.mIsChildInitialized ? "true" : "false")
|
|
<< ", mInterlinePosition=" << aDOMPoint.mInterlinePosition << " }";
|
|
return aStream;
|
|
}
|
|
|
|
private:
|
|
void EnsureChild() {
|
|
if (mIsChildInitialized) {
|
|
return;
|
|
}
|
|
if (!mParent) {
|
|
MOZ_ASSERT(!mOffset.isSome());
|
|
return;
|
|
}
|
|
MOZ_ASSERT(mOffset.isSome());
|
|
MOZ_ASSERT(mOffset.value() <= mParent->Length());
|
|
mIsChildInitialized = true;
|
|
if (!mParent->IsContainerNode()) {
|
|
return;
|
|
}
|
|
mChild = mParent->GetChildAt_Deprecated(mOffset.value());
|
|
MOZ_ASSERT(mChild || mOffset.value() == mParent->Length());
|
|
}
|
|
|
|
ParentType mParent = nullptr;
|
|
ChildType mChild = nullptr;
|
|
|
|
Maybe<uint32_t> mOffset;
|
|
InterlinePosition mInterlinePosition = InterlinePosition::Undefined;
|
|
bool mIsChildInitialized = false;
|
|
|
|
template <typename PT, typename CT>
|
|
friend class EditorDOMPointBase;
|
|
|
|
friend void ImplCycleCollectionTraverse(nsCycleCollectionTraversalCallback&,
|
|
EditorDOMPoint&, const char*,
|
|
uint32_t);
|
|
friend void ImplCycleCollectionUnlink(EditorDOMPoint&);
|
|
};
|
|
|
|
inline void ImplCycleCollectionUnlink(EditorDOMPoint& aField) {
|
|
ImplCycleCollectionUnlink(aField.mParent);
|
|
ImplCycleCollectionUnlink(aField.mChild);
|
|
}
|
|
|
|
inline void ImplCycleCollectionTraverse(
|
|
nsCycleCollectionTraversalCallback& aCallback, EditorDOMPoint& aField,
|
|
const char* aName, uint32_t aFlags) {
|
|
ImplCycleCollectionTraverse(aCallback, aField.mParent, "mParent", 0);
|
|
ImplCycleCollectionTraverse(aCallback, aField.mChild, "mChild", 0);
|
|
}
|
|
|
|
/**
|
|
* EditorDOMRangeBase class stores a pair of same EditorDOMPointBase type.
|
|
* The instance must be created with valid DOM points and start must be
|
|
* before or same as end.
|
|
*/
|
|
template <typename EditorDOMPointType>
|
|
class EditorDOMRangeBase final {
|
|
public:
|
|
using PointType = EditorDOMPointType;
|
|
|
|
EditorDOMRangeBase() = default;
|
|
template <typename PT, typename CT>
|
|
explicit EditorDOMRangeBase(const EditorDOMPointBase<PT, CT>& aStart)
|
|
: mStart(aStart), mEnd(aStart) {
|
|
MOZ_ASSERT(!mStart.IsSet() || mStart.IsSetAndValid());
|
|
}
|
|
template <typename StartPointType, typename EndPointType>
|
|
explicit EditorDOMRangeBase(const StartPointType& aStart,
|
|
const EndPointType& aEnd)
|
|
: mStart(aStart.template To<PointType>()),
|
|
mEnd(aEnd.template To<PointType>()) {
|
|
MOZ_ASSERT_IF(mStart.IsSet(), mStart.IsSetAndValid());
|
|
MOZ_ASSERT_IF(mEnd.IsSet(), mEnd.IsSetAndValid());
|
|
MOZ_ASSERT_IF(mStart.IsSet() && mEnd.IsSet(),
|
|
mStart.EqualsOrIsBefore(mEnd));
|
|
}
|
|
explicit EditorDOMRangeBase(const dom::AbstractRange& aRange)
|
|
: mStart(aRange.StartRef()), mEnd(aRange.EndRef()) {
|
|
MOZ_ASSERT_IF(mStart.IsSet(), mStart.IsSetAndValid());
|
|
MOZ_ASSERT_IF(mEnd.IsSet(), mEnd.IsSetAndValid());
|
|
MOZ_ASSERT_IF(mStart.IsSet() && mEnd.IsSet(),
|
|
mStart.EqualsOrIsBefore(mEnd));
|
|
}
|
|
|
|
template <typename MaybeOtherPointType>
|
|
MOZ_NEVER_INLINE_DEBUG void SetStart(const MaybeOtherPointType& aStart) {
|
|
mStart = aStart.template To<PointType>();
|
|
}
|
|
template <typename MaybeOtherPointType>
|
|
MOZ_NEVER_INLINE_DEBUG void SetEnd(const MaybeOtherPointType& aEnd) {
|
|
mEnd = aEnd.template To<PointType>();
|
|
}
|
|
template <typename StartPointType, typename EndPointType>
|
|
MOZ_NEVER_INLINE_DEBUG void SetStartAndEnd(const StartPointType& aStart,
|
|
const EndPointType& aEnd) {
|
|
MOZ_ASSERT_IF(aStart.IsSet() && aEnd.IsSet(),
|
|
aStart.EqualsOrIsBefore(aEnd));
|
|
mStart = aStart.template To<PointType>();
|
|
mEnd = aEnd.template To<PointType>();
|
|
}
|
|
void Clear() {
|
|
mStart.Clear();
|
|
mEnd.Clear();
|
|
}
|
|
|
|
const PointType& StartRef() const { return mStart; }
|
|
const PointType& EndRef() const { return mEnd; }
|
|
|
|
bool Collapsed() const {
|
|
MOZ_ASSERT(IsPositioned());
|
|
return mStart == mEnd;
|
|
}
|
|
bool IsPositioned() const { return mStart.IsSet() && mEnd.IsSet(); }
|
|
bool IsPositionedAndValid() const {
|
|
return mStart.IsSetAndValid() && mEnd.IsSetAndValid() &&
|
|
mStart.EqualsOrIsBefore(mEnd);
|
|
}
|
|
template <typename OtherPointType>
|
|
MOZ_NEVER_INLINE_DEBUG bool Contains(const OtherPointType& aPoint) const {
|
|
MOZ_ASSERT(aPoint.IsSetAndValid());
|
|
return IsPositioned() && aPoint.IsSet() &&
|
|
mStart.EqualsOrIsBefore(aPoint) && aPoint.IsBefore(mEnd);
|
|
}
|
|
bool InSameContainer() const {
|
|
MOZ_ASSERT(IsPositioned());
|
|
return IsPositioned() && mStart.GetContainer() == mEnd.GetContainer();
|
|
}
|
|
bool IsInContentNodes() const {
|
|
MOZ_ASSERT(IsPositioned());
|
|
return IsPositioned() && mStart.IsInContentNode() && mEnd.IsInContentNode();
|
|
}
|
|
bool IsInTextNodes() const {
|
|
MOZ_ASSERT(IsPositioned());
|
|
return IsPositioned() && mStart.IsInTextNode() && mEnd.IsInTextNode();
|
|
}
|
|
template <typename OtherRangeType>
|
|
bool operator==(const OtherRangeType& aOther) const {
|
|
return (!IsPositioned() && !aOther.IsPositioned()) ||
|
|
(mStart == aOther.mStart && mEnd == aOther.mEnd);
|
|
}
|
|
template <typename OtherRangeType>
|
|
bool operator!=(const OtherRangeType& aOther) const {
|
|
return !(*this == aOther);
|
|
}
|
|
|
|
EditorDOMRangeInTexts GetAsInTexts() const {
|
|
return IsInTextNodes()
|
|
? EditorDOMRangeInTexts(mStart.AsInText(), mEnd.AsInText())
|
|
: EditorDOMRangeInTexts();
|
|
}
|
|
MOZ_NEVER_INLINE_DEBUG EditorDOMRangeInTexts AsInTexts() const {
|
|
MOZ_ASSERT(IsInTextNodes());
|
|
return EditorDOMRangeInTexts(mStart.AsInText(), mEnd.AsInText());
|
|
}
|
|
|
|
bool EnsureNotInNativeAnonymousSubtree() {
|
|
if (mStart.IsInNativeAnonymousSubtree()) {
|
|
nsIContent* parent = nullptr;
|
|
for (parent = mStart.ContainerAsContent()
|
|
->GetClosestNativeAnonymousSubtreeRootParent();
|
|
parent && parent->IsInNativeAnonymousSubtree();
|
|
parent = parent->GetClosestNativeAnonymousSubtreeRootParent()) {
|
|
}
|
|
if (MOZ_UNLIKELY(!parent)) {
|
|
return false;
|
|
}
|
|
mStart.Set(parent);
|
|
}
|
|
if (mEnd.IsInNativeAnonymousSubtree()) {
|
|
nsIContent* parent = nullptr;
|
|
for (parent = mEnd.ContainerAsContent()
|
|
->GetClosestNativeAnonymousSubtreeRootParent();
|
|
parent && parent->IsInNativeAnonymousSubtree();
|
|
parent = parent->GetClosestNativeAnonymousSubtreeRootParent()) {
|
|
}
|
|
if (MOZ_UNLIKELY(!parent)) {
|
|
return false;
|
|
}
|
|
mEnd.SetAfter(parent);
|
|
}
|
|
return true;
|
|
}
|
|
|
|
private:
|
|
EditorDOMPointType mStart;
|
|
EditorDOMPointType mEnd;
|
|
|
|
friend void ImplCycleCollectionTraverse(nsCycleCollectionTraversalCallback&,
|
|
EditorDOMRange&, const char*,
|
|
uint32_t);
|
|
friend void ImplCycleCollectionUnlink(EditorDOMRange&);
|
|
};
|
|
|
|
inline void ImplCycleCollectionUnlink(EditorDOMRange& aField) {
|
|
ImplCycleCollectionUnlink(aField.mStart);
|
|
ImplCycleCollectionUnlink(aField.mEnd);
|
|
}
|
|
|
|
inline void ImplCycleCollectionTraverse(
|
|
nsCycleCollectionTraversalCallback& aCallback, EditorDOMRange& aField,
|
|
const char* aName, uint32_t aFlags) {
|
|
ImplCycleCollectionTraverse(aCallback, aField.mStart, "mStart", 0);
|
|
ImplCycleCollectionTraverse(aCallback, aField.mEnd, "mEnd", 0);
|
|
}
|
|
|
|
/**
|
|
* AutoEditorDOMPointOffsetInvalidator is useful if DOM tree will be changed
|
|
* when EditorDOMPoint instance is available and keeps referring same child
|
|
* node.
|
|
*
|
|
* This class automatically guarantees that given EditorDOMPoint instance
|
|
* stores the child node and invalidates its offset when the instance is
|
|
* destroyed. Additionally, users of this class can invalidate the offset
|
|
* manually when they need.
|
|
*/
|
|
class MOZ_STACK_CLASS AutoEditorDOMPointOffsetInvalidator final {
|
|
public:
|
|
explicit AutoEditorDOMPointOffsetInvalidator(EditorDOMPoint& aPoint)
|
|
: mPoint(aPoint), mCanceled(false) {
|
|
MOZ_ASSERT(aPoint.IsSetAndValid());
|
|
MOZ_ASSERT(mPoint.CanContainerHaveChildren());
|
|
mChild = mPoint.GetChild();
|
|
}
|
|
|
|
~AutoEditorDOMPointOffsetInvalidator() {
|
|
if (!mCanceled) {
|
|
InvalidateOffset();
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Manually, invalidate offset of the given point.
|
|
*/
|
|
void InvalidateOffset() {
|
|
if (mChild) {
|
|
mPoint.Set(mChild);
|
|
} else {
|
|
// If the point referred after the last child, let's keep referring
|
|
// after current last node of the old container.
|
|
mPoint.SetToEndOf(mPoint.GetContainer());
|
|
}
|
|
}
|
|
|
|
/**
|
|
* After calling Cancel(), mPoint won't be modified by the destructor.
|
|
*/
|
|
void Cancel() { mCanceled = true; }
|
|
|
|
private:
|
|
EditorDOMPoint& mPoint;
|
|
// Needs to store child node by ourselves because EditorDOMPoint stores
|
|
// child node with mRef which is previous sibling of current child node.
|
|
// Therefore, we cannot keep referring it if it's first child.
|
|
nsCOMPtr<nsIContent> mChild;
|
|
|
|
bool mCanceled;
|
|
|
|
AutoEditorDOMPointOffsetInvalidator() = delete;
|
|
AutoEditorDOMPointOffsetInvalidator(
|
|
const AutoEditorDOMPointOffsetInvalidator& aOther) = delete;
|
|
const AutoEditorDOMPointOffsetInvalidator& operator=(
|
|
const AutoEditorDOMPointOffsetInvalidator& aOther) = delete;
|
|
};
|
|
|
|
/**
|
|
* AutoEditorDOMPointChildInvalidator is useful if DOM tree will be changed
|
|
* when EditorDOMPoint instance is available and keeps referring same container
|
|
* and offset in it.
|
|
*
|
|
* This class automatically guarantees that given EditorDOMPoint instance
|
|
* stores offset and invalidates its child node when the instance is destroyed.
|
|
* Additionally, users of this class can invalidate the child manually when
|
|
* they need.
|
|
*/
|
|
class MOZ_STACK_CLASS AutoEditorDOMPointChildInvalidator final {
|
|
public:
|
|
explicit AutoEditorDOMPointChildInvalidator(EditorDOMPoint& aPoint)
|
|
: mPoint(aPoint), mCanceled(false) {
|
|
MOZ_ASSERT(aPoint.IsSetAndValid());
|
|
Unused << mPoint.Offset();
|
|
}
|
|
|
|
~AutoEditorDOMPointChildInvalidator() {
|
|
if (!mCanceled) {
|
|
InvalidateChild();
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Manually, invalidate child of the given point.
|
|
*/
|
|
void InvalidateChild() { mPoint.Set(mPoint.GetContainer(), mPoint.Offset()); }
|
|
|
|
/**
|
|
* After calling Cancel(), mPoint won't be modified by the destructor.
|
|
*/
|
|
void Cancel() { mCanceled = true; }
|
|
|
|
private:
|
|
EditorDOMPoint& mPoint;
|
|
|
|
bool mCanceled;
|
|
|
|
AutoEditorDOMPointChildInvalidator() = delete;
|
|
AutoEditorDOMPointChildInvalidator(
|
|
const AutoEditorDOMPointChildInvalidator& aOther) = delete;
|
|
const AutoEditorDOMPointChildInvalidator& operator=(
|
|
const AutoEditorDOMPointChildInvalidator& aOther) = delete;
|
|
};
|
|
|
|
} // namespace mozilla
|
|
|
|
#endif // #ifndef mozilla_EditorDOMPoint_h
|