[positive work] Automatic Indentation

[sagetrac-ahupfer]

The patch provides automatic indentation for python after colons and same level identation.
It works up to four levels of identation.

CC: @jasongrout

Component: notebook

Issue created by migration from https://trac.sagemath.org/ticket/4440

[sagetrac-mabshoff]

comment:2

There is already an attempt to do this at #1684.

Cheers,

Michael

[boothby]

comment:3

The restriction to 4 indentation levels is decidedly strange, given that the patch itself has a 6-deep indentation. This can be written more elegantly:

var indenting, id, tab;
indenting = RegExp("\n( *)","g");
while(indenting.test(text[0])) {
  id   = indexing.lastIndex;
  tab  = RegExp.lastMatch.substring(1);
}
if( id == second_last_break && second_last_break != -1) {
    get_cell(id).value = text[0] + tab + text[1]; 
    set_cursor_position(cell, position + tab.length);
}

The above code hasn't been tested, but should be a good start.

[sagetrac-ahupfer]

Attachment: identation.patch.gz

[sagetrac-ahupfer]

comment:4

Improved identation support with unlimited ident. Tested with Firefox, Safari, Chrome.
Works not, but doesn't break Internet Explorer and Opera.