I would like to use perltidy but I cannot quite wrap my head around how continuation indentation works when it comes to certain statements.

Formatting the lines

if ($foofoofoofoofoo && $barbarbarbarbar && $bazbazbazbazbaz && $quuxq
+uuxquuxquuxquux) {
    foo();
}

[download]
with perltidy using the default options of -l=80 -i=4 -ci=2, I would expect the program to output 
if ( $foofoofoofoofoo
  && $barbarbarbarbar
  && $bazbazbazbazbaz
  && $quuxquuxquuxquuxquux )
{
    foo();
}

[download]
However, the actual result is 
if (   $foofoofoofoofoo
    && $barbarbarbarbar
    && $bazbazbazbazbaz
    && $quuxquuxquuxquuxquux )
{
    foo();
}

[download]
That is, perltidy is breaking up the first line and indenting it with four spaces (actually, the number of spaces specified by the -i option) instead of two spaces. I have searched the ChangeLog of perltidy (which is otherwise very helpful in explaining changed behavior of the program) for an explanation but I haven't found other than that something seems to have changed between 2001 06 17 and 2001 10 16 which have the following, respectively: 
if ($bigwasteofspace1 && $bigwasteofspace2
  || $bigwasteofspace3 && $bigwasteofspace4)
{
    bigwastoftime();
}

if ( $opt_d
    || $opt_m
    || $opt_p
    || $opt_t
    || $opt_x
    || ( -e $archive && $opt_r ) )
{
    ( $pAr, $pNames ) = readAr($archive);
}

[download]

My first thought was that perltidy is aligning the expression with the opening paren, but that does not seem to be the case, as replacing if with while yields

while ($foofoofoofoofoo
    && $barbarbarbarbar
    && $bazbazbazbazbaz
    && $quuxquuxquuxquuxquux )
{
    foo();
}

[download]

It may be noted that perltidy does not insert a space after the opening paren despite the the manual's claim that spaces within containers are always symmetric. In fact, while -pt=2 will remove the space before the closing paren, not even -pt=0 will insert a space after the opening paren.

Why is perltidy using indent-columns instead of continuation-indentation and why is the tightness not symmetric in these particular cases? What is it that I fail to understand? Is continuation-indentation used only for certain long lines and not for others?

In reply to Why is perltidy using indent-columns instead of continuation-indentation when breaking up a long if-line? by torgny

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