2d_print support

Author: mmatera

mathics/builtin/box/layout.py

@@ -146,6 +146,7 @@ class GridBox(BoxExpression):
     # >> MathMLForm[TableForm[{{a,b},{c,d}}]]
     #  = ...
     """
+
     options = {"ColumnAlignments": "Center"}
     summary_text = "low-level representation of an arbitrary 2D layout"
 
@@ -211,6 +212,33 @@ def eval_display(boxexpr, evaluation):
         return boxexpr.elements[0]
 
 
+class PaneBox(BoxExpression):
+    """
+    <url>
+    :WMA link:
+    https://reference.wolfram.com/language/ref/InterpretationBox.html</url>
+
+    <dl>
+      <dt>'PaneBox[expr]'
+      <dd> is a low-level box construct, used in OutputForm.
+    </dl>
+
+    """
+
+    attributes = A_HOLD_ALL_COMPLETE | A_PROTECTED | A_READ_PROTECTED
+    summary_text = "box associated to panel"
+
+    def apply_display(boxexpr, evaluation, expression):
+        """ToExpression[boxexpr_PaneBox, form_]"""
+        return Expression(expression.head, boxexpr.elements[0], form).evaluate(
+            evaluation
+        )
+
+    def apply_display(boxexpr, evaluation):
+        """DisplayForm[boxexpr_PaneBox]"""
+        return boxexpr.elements[0]
+
+
 class RowBox(BoxExpression):
     """
     <url>

mathics/builtin/forms/output.py

@@ -16,7 +16,13 @@
 from math import ceil
 from typing import Optional
 
-from mathics.builtin.box.layout import GridBox, RowBox, to_boxes
+from mathics.builtin.box.layout import (
+    GridBox,
+    InterpretationBox,
+    PaneBox,
+    RowBox,
+    to_boxes,
+)
 from mathics.builtin.forms.base import FormBaseClass
 from mathics.builtin.makeboxes import MakeBoxes, NumberForm_to_String
 from mathics.builtin.tensors import get_dimensions
@@ -29,6 +35,7 @@
     StringFromPython,
 )
 from mathics.core.builtin import Builtin
+from mathics.core.convert.prettyprint import expression_to_2d_text
 from mathics.core.evaluation import Evaluation
 from mathics.core.expression import BoxError, Expression
 from mathics.core.list import ListExpression
@@ -561,8 +568,18 @@ class OutputForm(FormBaseClass):
      = -Graphics-
     """
 
+    formats = {"OutputForm[s_String]": "s"}
     summary_text = "plain-text output format"
 
+    def eval_makeboxes(self, expr, form, evaluation):
+        """MakeBoxes[OutputForm[expr_], form_]"""
+        print(" eval Makeboxes outputform")
+        text2d = expression_to_2d_text(expr, evaluation, form).text
+        elem1 = PaneBox(String(text2d))
+        elem2 = Expression(SymbolOutputForm, expr)
+        result = InterpretationBox(elem1, elem2)
+        return result
+
 
 class PythonForm(FormBaseClass):
     """