[QScintilla] setAutoIndentStyle doesn't work

[Matic Kukovec]

> On 14 May 2017, at 11:24 pm, Matic Kukovec <kukovecmatic at hotmail.com> wrote:
> >
> >
> > > On 14 May 2017, at 11:26 am, kristof.mulier at telenet.be wrote:
> > > >
> > > > Dear QScintilla users,
> > > >
> > > > Automatic indentation is a very nice feature offered by QScintilla. When inserting a new line, automatic indentation pushes the cursor to the same indentation level as the previous one. You have two options to switch on this feature: (1) call the function setAutoIndent(True) on the QsciScintilla editor or (2) call the function setAutoIndentStyle(..) on the lexer.
> > > >
> > > > The first option works. The second doesn't. For full details on the problem, please take a look at the following StackOverflow question:
> > > >
> > > > http://stackoverflow.com/questions/43962669/setautoindentstyle-on-the-qscintilla-lexer-doesnt-work
> > > >
> > > > Do you know the answer?
> > >
> > > You have to implement the various block method (blockStart(), blockEnd() etc).
> > >
> > > Phil
> >
> > Hey Phil,
> >
> > Tried implementing blockStart() and blockEnd(), but it throws a TypeError if using for example:
> > def blockStart(self):
> >         return "{"
> >
> > def blockEnd(self):
> >         return "}"
> > With a bit of trial&error I found that the methods need to return a tuple of (bytes, int). Why?
>
> http://pyqt.sourceforge.net/Docs/QScintilla2/classQsciLexer.html#a7c99eb2877dc6a9762815bc0471f0c36
>
> Phil

Hey Phil,

I'm assuming it means that it returns a tuple(bytesstring_of_block_start_chars, pointer_to_style), because lexers that implement the blockStart method (like QsciLexerPython) return (None, some_large_number). But why do they always return the byte_string as None?

Anyway, I edited the blockStart() and blockEnd() methods of my custom lexer to:
def blockStart(self):
    return b'{', 0

def blockStart(self):
    return b'}', 0
and set the qscintilla editors setAutoIndent(True) and my custom lexers setAutoIndentStyle(QsciScintilla.AiOpening | QsciScintilla.AiOpening). Now the next line after inserting a '{' doesn't indent (like in the QsciLexerCPP, for example), but it does unindent when inserting a '}'?
Example:
if (test)
{
|<- doesn't indent
Then I manually indent:
if (test)
{
    |<- manual indent with the tab key
     test line added;
Inserting the '}' character unindents automatically:
if (test)
{

     test line added;
} <- automatically unindented from the previous line's indentation level
I really have no idea if I'm doing something wrong or if I'm misunderstanding something, could you please help?

P.S.:
I'm also helping Kristof, so that is why we are both posting separately on the same topic.

Matic

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