feat: improve RenPy conversion and support MIST runtime

backend/app/converter/rpy_helpers.py

@@ -5,35 +5,31 @@ import re
 import warnings
 from typing import Any
 
-from app.converter.pyexpr import Expr
+from app.converter.pyexpr import Expr, python_ast
 
 Node = dict[str, Any]
 
 POSITION_PROPS = {"xpos", "ypos", "xanchor", "yanchor", "xalign", "yalign", "xcenter",
                   "ycenter", "zoom", "xzoom", "yzoom", "alpha", "rotate", "xoffset", "yoffset",
-                  "align", "pos", "anchor", "xysize", "size", "blur", "matrixcolor", "xycenter"}
+                  "align", "pos", "anchor", "xysize", "size", "blur", "matrixcolor", "xycenter",
+                  "xsize", "ysize", "crop"}
 
 
 _SHOW_KEYWORDS = {"at", "as", "behind", "onlayer", "with", "zorder"}
 _NUMBER_LINE = re.compile(r"^\d+(\.\d*)?$|^\.\d+$")
 _CALL_LINE = re.compile(r"^([A-Za-z_][\w.]*)\s*\(")
 _DISPLAYABLE_CALLS = {"Movie", "Solid", "Transform", "Composite", "LiveComposite", "Fixed",
-                      "ConditionSwitch", "Image", "Text", "im.Scale", "im.FactorScale", "im.Flip",
+                      "ConditionSwitch", "TransitionConditionSwitch", "Image", "Text", "AlphaMask", "im.Scale", "im.FactorScale", "im.Flip",
                       "im.Composite", "im.Crop", "im.Grayscale", "im.Sepia", "Frame", "Flatten"}
 _MEDIA_EXTS = {"png", "jpg", "jpeg", "webp", "gif", "bmp", "avif", "ogg", "mp3", "wav", "opus",
                "flac", "webm", "ogv", "mp4", "mkv", "avi", "m4a"}
 
 
-def _dedent(source: str) -> str:
-    import textwrap
-    return textwrap.dedent(source)
-
-
 def _parse_py(source: str, mode: str = "exec") -> ast.AST:
     # decompiled scripts are full of "\{" in plain strings: don't spam SyntaxWarning
     with warnings.catch_warnings():
         warnings.simplefilter("ignore")
-        return ast.parse(_dedent(source), mode=mode)
+        return python_ast(source, mode=mode)
 
 
 def _dotted_name(e: Expr) -> str: