nsIHTMLEditor::Indent() is used for handling Tab key in HandleKeyPressEvent()
and used for implementing indent/outdent commands. Unfortunately, it takes
string argument to switch between indent or outdent. So, it does not make
sense to use this in C++ code.
This patch creates IndentAsAction() and OutdentAsAction() as public methods
and the implementation is moved to IndentOrOutdentAsSubAction() which takes
EditSubAction to switch between indent and outdent.
Note that HandleKeyPressEvent() uses the new public methods. However, this
is not problem for the future changes since HandleKeyPressEvent() is an
exception which may call other public methods.
Differential Revision: https://phabricator.services.mozilla.com/D3202
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extra : moz-landing-system : lando
557a9e3c62