On 28/02/17 02:12, Ben Coman wrote:
On Tue, Feb 28, 2017 at 11:28 AM, Offray Vladimir Luna Cárdenas
<offray.l...@mutabit.com <mailto:offray.l...@mutabit.com>> wrote:
Hi,
I would like to store the object resulting from executing a
playground. This would imply two steps:
- Knowing that the playground content was executed (via the play
button or its shortcuts Ctrl + Shift + g or Ctrl + g).
- Getting the results of that execution. For example if the result
at the end is a string or a dictionary, I would like to get that
string or dictionary.
Any pointers on how to make that will be welcomed.
Cheers,
Offray
Ps: I still get lost when I search by myself trying to answer
questions like the ones above. I imagine that in some way is
related with evaluationAction and presentations, by looking for
the source code of "do it and go", but still I can't get a
functional code snippet to start prototyping.
In playground, if you evaluate "self halt. 42" at top of the debug
stack you'll see method...
Undefined>>DoIt
self halt.
^ 42
where stepping
OVER returns 42 into "value" variable in OpalCompiler>>evaluate
OVER returns 42 into "result" variable in
RubSmalltalkEditor>>evaluate:andDo:
at the end of which stepping
INTO "^aBlock value: result" takes you to
RubSmalltalkEditor>>highlightEvaluateAndDo:, where
INTO "[:result | aBlock value: result]" takes you to
GLMPharoScriptPResentation(GLMRubricSmalltalkCodePresentation)>>executionSelectionActions
Wow that was pretty insightful! Thanks Ben. I still don't know when to
use Over or Into, but that idea of inserting a halt in a playground to
inspect behavior from them is really powerful.
where changing "aPresentation highlightEvaluateAndDo: [ :result | ] ];
to "aPresentation highlightEvaluateAndDo: [
:result | self inform: 'Result ' , result printString] ]; "
and opening a new Playground, then evaluating "42" informs us that
42 is the result.
Yes, that captures and informs the result of the playground. Something
similar happens when I change GLMPharoScriptPresentation>>goAction with:
action: [ :t :entity |
t highlightEvaluateAndDo: [ :result | t selection:
result. self inform: 'Result ' , result printString ] ];
So, I'm able now to capture the result of a code execution in a
playground (a partial selection or the full code)
Stepping further along, in
GLMMorphicPharoScriptRenderer(GLMMorphicPharoCodePresentation)>>highlightEvaluateAndDo::
the value returned from...
self
evaluate: self highlightedTextAsStream
andDo: [:result | aBlock value: result. ].
is not 42 but aGLMPharoScriptPresentation. it might help to change
that to...
andDo: [:result | aBlock value: result. result ].
but anyway that return value is thrown away in
GLMMorphicPharoScriptRenderer(GLMMorphicPharoCodePresentation)>>actOnHighlightAndEvaluate:
So subclassing GLMRubricSmalltalkCodePresentation and overriding
#executionSelectionActions
is perhaps your best bet. Or some GLM expert provides a nice way for
a user to set this customAssignmentBlock...
aPresentation highlightEvaluateAndDo: [ :result |
customAssignmentBlock value: result ].
in #executionSelectionActions.
Yes, I would expect a more "user friendly" way to do it. Something
related with playground announcements to know when the play button has
been executed and how the resulting object of this particular action is
showed in the resulting pane. Is there a possibility like this?
Cheers,
Offray
