HTMLEditRules::WillInsertBreak() started to use HTMLEditRules::MakeBasicBlock()
to wrap existing inline elements with default paragraph separator if inline
elements are children of editing host. However,
HTMLEditRules::ApplyBlockStyle() called by HTMLEditRules::MakeBasicBlock() sets
mNewNode to last new block node. So, if it wraps inline elements after caret
position, mNewNode becomes after expected caret position and
HTMLEditRules::AfterEditInner() will move caret into it.
This patch make HTMLEditRules::WillInsertBreak() reset mNewNode with
caret position after calling HTMLEditRules::MakeBasicBlock().
Additionally, this patch fixes a bug of HTMLEditor::IsVisibleBRElement().
That is, it uses only editable nodes to check if given <br> element is
visible. However, editable state is not related to this check. If <br>
element is followed by non-editable inline node (except invisible data
nodes), it always visible. This bug caused getting wrong nodes with
HTMLEditRules::GetNodesFromSelection() which is used by
HTMLEditRules::MakeBasicBlock(). Therefore, this patch also adds lots of
EditorBase::Get(Next|Previous)ElementOrText*() and
HTMLEditor::Get(Next|Previous)HTMLElementOrText*() to ignore only invisible
data nodes.
Note that even with this fix, the range of nodes computed by
HTMLEditRules::GetNodesFromSelection() is still odd if only non-editable
elements follow a <br> node which is first <br> element after the caret
position. However, what is expected by the execCommand spec is unclear.
So, automated test added by this patch checks current inconsistent behavior
for now.
MozReview-Commit-ID: 2m52StwoEEH
--HG--
extra : rebase_source : 6b9b2338e35c4d2e89a405fd8e1ffc7b0873ca1e
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