Masayuki Nakano 448571fd81 Bug 1533293 - part 2: Rewrite EditorBase::SelectEntireDocument() and its overrides r=m_kato
`EditorBase::SelectEntierDocument()` uses `Selection::Extend()` but it's too
slow.  It should use `Selection::SetStartAndEndInLimiter()` instead.

Additionally, `TextEditor::SelectEntierDocument()` shrink the result of
`EditorBase::SelectEntierDocument()` with `Selection::Extend()` if there is
a `moz-<br>` element.  So, `TextEditor::SelectEntinerDocument()` should set
its expected selection with a call for saving the runtime cost.

Then, we don't need to make `EditorBase::SelectEntierDocument()` as non-pure
virtual method.  So, this patch makes each its callers call
`Selection->SelectAllChildren()` directly.

Differential Revision: https://phabricator.services.mozilla.com/D23461

--HG--
extra : moz-landing-system : lando
2019-03-18 01:51:53 +00:00

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