[racket-dev] printing images in REPL

Did you forget what I explained at PLT day? You don't seem to be
asking questions in terms of those things, so I'm not sure whether
what I say is getting thru at all.

Robby

On Sat, Aug 28, 2010 at 8:47 PM, Shriram Krishnamurthi <sk at cs.brown.edu> wrote:
> ... which was my original question.  But thanks.
>
> On Sat, Aug 28, 2010 at 9:36 PM, Robby Findler
> <robby at eecs.northwestern.edu> wrote:
>> I guess you don't have the print handler set up right.
>>
>> On Sat, Aug 28, 2010 at 8:23 PM, Shriram Krishnamurthi <sk at cs.brown.edu> wrote:
>>> The value I was returning is whatever kind of object is returned when
>>> you embed an image in the Definitions window.  That is, this was a
>>> pasted, atomic image, not one created by a computation.  I guess
>>> they're not treated the same, but I'm surprised that ASL processing
>>> the Definitions window didn't do the right conversion...
>>>
>>> On Thu, Aug 26, 2010 at 8:25 PM, Robby Findler
>>> <robby at eecs.northwestern.edu> wrote:
>>>> At the moment there is a barn-door sized security hole in DrRacket,
>>>> whereby it will take any snip% instance from the user's program and
>>>> just display it in the repl. You can exploit this for Good by making
>>>> the current-print of your language turn some values into snips (like
>>>> images and things). 2htdp/image already does this, so that should just
>>>> work if you return those. Its hard to tell what value Shriram's
>>>> program was returning tho. But if it is a bitmap% object, he just has
>>>> to do
>>>>
>>>>  (make-object image-snip% ...the-bitmap-goes-here...)
>>>>
>>>> We will close this hole at some point, when we have a reasonable way
>>>> to allow people to add new kinds of values without the security
>>>> breach.
>>>>
>>>> Robby
>>>>
>>>> On Thu, Aug 26, 2010 at 6:17 PM, Jay McCarthy <jay.mccarthy at gmail.com> wrote:
>>>>> From what I can tell, it comes from ensuring that DrRacket shares the
>>>>> htdp/image (or whatever) namespace with the running program so the
>>>>> structs are the same and DrRacket's default renderer is detecting it.
>>>>> I'm not sure how to replicate it though. (I tried for a bit so I could
>>>>> make #lang frtime work.)
>>>>>
>>>>> Jay
>>>>>
>>>>> On Thu, Aug 26, 2010 at 11:55 AM, Shriram Krishnamurthi <sk at cs.brown.edu> wrote:
>>>>>> What is the #lang magic that makes
>>>>>>
>>>>>>> (get-image-from-web "http://racket-lang.org/logo.png")
>>>>>> (instantiate (class ...) ...)
>>>>>>
>>>>>> show the image rather than just its constructor?
>>>>>>
>>>>>> Shriram
>>>>>> _________________________________________________
>>>>>>  For list-related administrative tasks:
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>>>>>>
>>>>>
>>>>>
>>>>>
>>>>> --
>>>>> Jay McCarthy <jay at cs.byu.edu>
>>>>> Assistant Professor / Brigham Young University
>>>>> http://teammccarthy.org/jay
>>>>>
>>>>> "The glory of God is Intelligence" - D&C 93
>>>>> _________________________________________________
>>>>>  For list-related administrative tasks:
>>>>>  http://lists.racket-lang.org/listinfo/dev
>>>>
>>>
>> _________________________________________________
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>