How should we handle a forward slash "/" in new file and rename dialogs?

[Mark]

On Fri, Nov 2, 2012 at 10:08 PM, Mark <markg85 at gmail.com> wrote:
> On Tue, Oct 30, 2012 at 10:39 PM, Frank Reininghaus
> <frank78ac at googlemail.com> wrote:
>>
>> Hi Mark and Emmanuel,
>>
>> thanks for your investigations!
>>
>> 2012/10/30 Mark:
>> > Hi,
>> >
>> > I'm doing a bit of dolphin bug triaging and encountered a few bugs
>> > already that have something to do with a "/" in a filename. See [1]
>> > and [2]. I can see a few possible solutions here.
>> >
>> > 1. "/" is forbidden.
>> > --------------------------------------
>> > Since "/" is a directory seperator it might just be unwise to even
>> > consider using it in a filename. Also, if dolphin supports this it's
>> > by far a certainty that others support it as well.
>> >
>> > 2. Replace "/" by "⁄".
>> > --------------------------------------
>> > It looks like a slash but is a divider sign. This might be a workable
>> > solution but will change the user input (a "/") to the divider symbol.
>>
>> it seems that this currently happens when renaming with the rename
>> dialog, even though I can't see why this could make sense. Before we
>> discuss this further, could someone investigate where in the code the
>> replacement happens and why it's done?
>>
>> Best regards,
>> Frank
>
>
> I've done a few hours (!!) of digging just to find where the / is
> replaced by a ⁄ and couldn't find it within the dolphin sources.
> Actually, the new file stuff all seems to be going through
> DolphinNewFileMenu which goos back to a KNewFileMenu which can be
> found here: http://api.kde.org/4.9-api/kdelibs-apidocs/kfile/html/knewfilemenu_8cpp_source.html
> From there on i'm losing it's path since i'm trying to follow the
> KInputDialog, but that class in only included in that file, not
> actually used.
>
> Adding David to the CC since he might know more here? (he is in the
> author list of that file). David, what i'm trying to figure out is why
> a "/" is replaced by a "⁄" (notice the subtle difference) when it's
> used inside a filename. A "\" doesn't get replaced and just works as
> expected.

GOTCHA!
http://api.kde.org/4.9-api/kdelibs-apidocs/kio/html/global_8cpp_source.html
line 149 is the one that translates "/" to "⁄".

Now the question is: Why?