Automatically identify the class name based on the specified line number. (#2280)

* identify the scene name based on the line number

* resolving a minor bug in string_mobject

* removing bug of string validation

* Update manimlib/default_config.yml

Co-authored-by: Splines <37160523+Splines@users.noreply.github.com>

* Update manimlib/extract_scene.py

Co-authored-by: Splines <37160523+Splines@users.noreply.github.com>

* update search scene names

---------

Co-authored-by: Splines <37160523+Splines@users.noreply.github.com>

manimlib/default_config.yml

@@ -5,13 +5,13 @@
 # you are running manim. For 3blue1brown, for instance, mind is
 # here: https://github.com/3b1b/videos/blob/master/custom_config.yml
 
-# Alternatively, you can create it whereever you like, and on running
+# Alternatively, you can create it wherever you like, and on running
 # manim, pass in `--config_file /path/to/custom/config/file.yml`
 
 directories:
   # Set this to true if you want the path to video files
   # to match the directory structure of the path to the
-  # sourcecode generating that video
+  # source code generating that video
   mirror_module_path: False
   # Manim may write to and read from the file system, e.g.
   # to render videos and to look for svg/png assets. This
@@ -44,7 +44,7 @@ window:
   # If not full screen, the default to give it half the screen width
   full_screen: False
   # Other optional specifications that override the above include:
-  # position: (500, 500)  # Specific position, in pixel coordiantes, for upper right corner
+  # position: (500, 500)  # Specific position, in pixel coordinates, for upper right corner
   # size: (1920, 1080)  # Specific size, in pixels
 camera:
   resolution: (1920, 1080)

manimlib/extract_scene.py

@@ -12,6 +12,7 @@ from manimlib.scene.interactive_scene import InteractiveScene
 from manimlib.scene.scene import Scene
 
 from typing import TYPE_CHECKING
+
 if TYPE_CHECKING:
     Module = importlib.util.types.ModuleType
     from typing import Optional
@@ -142,7 +143,7 @@ def get_indent(code_lines: list[str], line_number: int) -> str:
     return n_spaces * " "
 
 
-def insert_embed_line_to_module(module: Module, line_number: int):
+def insert_embed_line_to_module(module: Module, run_config: Dict) -> None:
     """
     This is hacky, but convenient. When user includes the argument "-e", it will try
     to recreate a file that inserts the line `self.embed()` into the end of the scene's
@@ -150,27 +151,42 @@ def insert_embed_line_to_module(module: Module, line_number: int):
     the last line in the sourcefile which includes that string.
     """
     lines = inspect.getsource(module).splitlines()
+    line_number = run_config.embed_line
 
     # Add the relevant embed line to the code
     indent = get_indent(lines, line_number)
     lines.insert(line_number, indent + "self.embed()")
     new_code = "\n".join(lines)
 
+    # When the user executes the `-e <line_number>` command
+    # without specifying scene_names, the nearest class name above
+    # `<line_number>` will be automatically used as 'scene_names'.
+
+    if not run_config.scene_names:
+        classes = list(filter(lambda line: line.startswith("class"), lines[:line_number]))
+        if classes:
+            from re import search
+
+            scene_name = search(r"(\w+)\(", classes[-1])
+            run_config.update(scene_names=[scene_name.group(1)])
+        else:
+            log.error(f"No 'class' found above {line_number}!")
+
     # Execute the code, which presumably redefines the user's
     # scene to include this embed line, within the relevant module.
     code_object = compile(new_code, module.__name__, 'exec')
     exec(code_object, module.__dict__)
 
 
-def get_module(file_name: Optional[str], embed_line: Optional[int], is_reload: bool = False) -> Module:
+def get_module(run_config: Dict) -> Module:
-    module = ModuleLoader.get_module(file_name, is_reload)
+    module = ModuleLoader.get_module(run_config.file_name, run_config.is_reload)
-    if embed_line:
+    if run_config.embed_line:
-        insert_embed_line_to_module(module, embed_line)
+        insert_embed_line_to_module(module, run_config)
     return module
 
 
 def main(scene_config: Dict, run_config: Dict):
-    module = get_module(run_config.file_name, run_config.embed_line, run_config.is_reload)
+    module = get_module(run_config)
     all_scene_classes = get_scene_classes(module)
     scenes = get_scenes_to_render(all_scene_classes, scene_config, run_config)
     if len(scenes) == 0:

manimlib/mobject/probability.py

@@ -43,6 +43,7 @@ class SampleSpace(Rectangle):
             fill_opacity=fill_opacity,
             stroke_width=stroke_width,
             stroke_color=stroke_color,
+            **kwargs
         )
         self.default_label_scale_val = default_label_scale_val
 

manimlib/mobject/svg/string_mobject.py

@@ -122,8 +122,8 @@ class StringMobject(SVGMobject, ABC):
         # of submobject which are and use those for labels
         unlabelled_submobs = submobs
         labelled_content = self.get_content(is_labelled=True)
-        labelled_file = self.get_file_path_by_content(labelled_content)
+        labelled_file = self.get_svg_string_by_content(labelled_content)
-        labelled_submobs = super().mobjects_from_file(labelled_file)
+        labelled_submobs = super().mobjects_from_svg_string(labelled_file)
         self.labelled_submobs = labelled_submobs
         self.unlabelled_submobs = unlabelled_submobs
 

manimlib/mobject/svg/text_mobject.py

@@ -176,9 +176,6 @@ class MarkupText(StringMobject):
         self.disable_ligatures = disable_ligatures
         self.isolate = isolate
 
-        if not isinstance(self, Text):
-            self.validate_markup_string(text)
-
         super().__init__(text, height=height, **kwargs)
 
         if self.t2g: