RangeBoundaryBase shouldn't compute mRef when it's initialized with offset.
E.g., some users of the template class may initialize it with a container and
offset in it but it may not refer mRef or may refer after modifying offset.
On the other hand, RangeBoundaryBase::InvalidateOffset() is a special method.
It assumes that mRef is always initialized when it's called but can be
invalidate mOffset until retrieved actually. This is necessary for
nsRange::mStart and nsRange::mEnd since the offset may be changed when
some nodes are inserted before the referring node.
So, now, InvalidateOffset() should be a protected method and make nsRange a
friend class of RangeBoundaryBase. Then, when nsRange sets mStart and/or mEnd,
nsRange itself should guarantee that their mRefs are initialized.
MozReview-Commit-ID: Alr4YkDXIND
--HG--
extra : rebase_source : 7e6828374db7989ae91b9e485571ec553f7435af
A lot of methods in editor returns a child offset with an out param when it
returns its container and offset in the container. This is ugly hack for
performance of nsINode::IndexOf(). However, there are a lot of regression
since the relation between offset and child node can be broken really easily.
So, we should make EditorDOMPoint as a subclass of RangeBoundary and manage
a set of container, reference child and its offset in it (e.g.,
SetNextSibling() added by this patch).
Note that RangeBoundary's performance is not good for temporary use if we set
a point with offset, it immediately retrieves mRef. The following patch will
improve this performance.
MozReview-Commit-ID: 7mcJ1P1OjVr
--HG--
rename : editor/libeditor/EditorUtils.h => editor/libeditor/EditorDOMPoint.h
extra : rebase_source : 785094fcfc592d9e5b48cbc36ed225dbb8bb4111
This is necessary, as we now use RangeBoundary objects as intermediate types to
pass (parent,offset) pairs into constructors for nsRange. We are allowed to try
to construct invalid nsRange objects, but unfortunately doing so would fire an
assertion if we don't allow constructing invalid RangeBoundary objects.
It's possible to check if the RangeBoundary object is valid by calling
`IsSetAndValid`, which should be done for error checking when you don't trust
the source of the RangeBoundary object anyway.
MozReview-Commit-ID: 3Pf80ndRZLW
