Masayuki Nakano 15fcb38af8 Bug 1548389 - part 10: Make TextEditor::SetUnmaskRangeInternal() expand the range if specified offset is middle of a surrogate pair r=m_kato
Unmasking is an optional style of showing password.  Therefore, if callers of
`nsIEditor::Unmask()` specify middle of surrogate pair(s), it may mean that
they want to expand the unmask range from shorter range which does not include
the high and/or low surrogate.  Therefore, one of the surrogates is in unmasked
range, we unmask the surrogate pair.  However, we handle this in a lot of
places, i..e., we have duplicated code.  This can get rid of these duplicates
with making `nsIEditor::Unmask()` expand the range automatically.

Differential Revision: https://phabricator.services.mozilla.com/D38432

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extra : moz-landing-system : lando
2019-07-22 03:56:33 +00:00
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