taexportpython: generate the exported file and fill it with some setup code

  - taexportpython will eventually transform all the action stacks into python
    code and wrap them in separate functions

1 files changed, 115 insertions, 0 deletions

diff --git a/TurtleArt/taexportpython.py b/TurtleArt/taexportpython.py
new file mode 100644
index 0000000..ac04512
--- /dev/null
+++ b/TurtleArt/taexportpython.py
@@ -0,0 +1,115 @@
+#Copyright (c) 2013 Marion Zepf
+
+#Permission is hereby granted, free of charge, to any person obtaining a copy
+#of this software and associated documentation files (the "Software"), to deal
+#in the Software without restriction, including without limitation the rights
+#to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+#copies of the Software, and to permit persons to whom the Software is
+#furnished to do so, subject to the following conditions:
+
+#The above copyright notice and this permission notice shall be included in
+#all copies or substantial portions of the Software.
+
+#THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+#IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+#FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+#AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+#LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+#OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+#THE SOFTWARE.
+
+""" Python export tool """
+
+import re
+from os import linesep
+
+
+
+_SETUP_CODE_START = """\
+#!/usr/bin/env python
+
+from window_setup import *
+
+
+tw = get_tw()
+
+BOX = {}
+ACTION = {}
+
+
+
+"""
+_SETUP_CODE_END = """\
+
+
+
+if __name__ == '__main__':
+    start()
+    gtk.main()
+
+
+"""
+_ACTION_STACK_START = """\
+def %s():
+    turtle = tw.turtles.get_active_turtle()
+    canvas = tw.canvas
+    logo = tw.lc
+
+"""
+_ACTION_STACK_END = """\
+ACTION["%s"] = %s
+"""
+# character that is illegal in a Python identifier
+PAT_IDENTIFIER_ILLEGAL_CHAR = re.compile("[^A-Za-z0-9_]")
+
+
+
+def action_stack_to_python(blklist, name="start"):
+    """ Turn a stack of blocks into python code
+    name -- the name of the action stack (defaults to "start") """
+    # TODO loop over blklist and get the AST for every block
+    # TODO serialize the ASTs into python code
+    generated_code = "pass"
+
+    # wrap the setup code around everything
+    name_id = _make_identifier(name)
+    generated_code = _indent(generated_code, 1)
+    if generated_code.endswith(linesep):
+        newline = ""
+    else:
+        newline = linesep
+    snippets = [_SETUP_CODE_START,
+        _ACTION_STACK_START % (name_id),
+        generated_code,
+        newline,
+        _ACTION_STACK_END % (name, name_id),
+        _SETUP_CODE_END]
+    return "".join(snippets)
+
+def _make_identifier(name):
+    """ Turn name into a Python identifier name by replacing illegal
+    characters """
+    replaced = re.sub(PAT_IDENTIFIER_ILLEGAL_CHAR, "_", name)
+    # TODO find better strategy to avoid number at beginning
+    if re.match("[0-9]", replaced):
+        replaced = "_" + replaced
+    return replaced
+
+def _indent(code, num_levels=1):
+    """ Indent each line of code with num_levels * 4 spaces
+    code -- some python code as a (multi-line) string """
+    indentation = " " * (4 * num_levels)
+    line_list = code.split(linesep)
+    new_line_list = []
+    for line in line_list:
+        new_line_list.append(indentation + line)
+    return linesep.join(new_line_list)
+
+
+
+if __name__ == "__main__":
+    f = open("/bigrepos/sugar-labs/ta-python-export-dev/exported.py", "w")
+    f.write(action_stack_to_python([]))
+    f.close()
+
+