Clean up special_tex contents, make each class use MTexText instead of TexText

manimlib/mobject/svg/special_tex.py

@@ -1,61 +1,48 @@
 from __future__ import annotations
 
-from manimlib.constants import WHITE, GREY_C
+from manimlib.constants import MED_SMALL_BUFF, WHITE, GREY_C
 from manimlib.constants import DOWN, LEFT, RIGHT, UP
 from manimlib.constants import FRAME_WIDTH
 from manimlib.constants import MED_LARGE_BUFF, SMALL_BUFF
 from manimlib.mobject.geometry import Line
-from manimlib.mobject.svg.tex_mobject import Tex, TexText
-from manimlib.mobject.svg.mtex_mobject import MTex, MTexText
+from manimlib.mobject.types.vectorized_mobject import VGroup
+from manimlib.mobject.svg.mtex_mobject import MTexText
 
 
 from typing import TYPE_CHECKING
 
 if TYPE_CHECKING:
-    from manimlib.typing import ManimColor
+    from manimlib.typing import ManimColor, Vect3
 
 
 
-class BulletedList(TexText):
+class BulletedList(VGroup):
     def __init__(
         self,
         *items: str,
         buff: float = MED_LARGE_BUFF,
-        dot_scale_factor: float = 2.0,
-        alignment: str = "",
+        aligned_edge: Vect3 = LEFT,
         **kwargs
     ):  
-        super().__init__(
-            *(s + R"\\" for s in items),
-            alignment=alignment,
-            **kwargs
-        )
-        for part in self:
-            dot = Tex(R"\cdot").scale(dot_scale_factor)
-            dot.next_to(part[0], LEFT, SMALL_BUFF)
-            part.add_to_back(dot)
-        self.arrange(
-            DOWN,
-            aligned_edge=LEFT,
-            buff=buff
-        )
+        labelled_content = [R"\item " + item for item in items]
+        tex_string = "\n".join([
+            R"\begin{itemize}",
+            *labelled_content,
+            R"\end{itemize}"
+        ])
+        tex_text = MTexText(tex_string, isolate=labelled_content, **kwargs)
+        lines = (tex_text.select_part(part) for part in labelled_content)
 
-    def fade_all_but(self, index_or_string: int | str, opacity: float = 0.5) -> None:
-        arg = index_or_string
-        if isinstance(arg, str):
-            part = self.get_part_by_tex(arg)
-        elif isinstance(arg, int):
-            part = self.submobjects[arg]
-        else:
-            raise Exception("Expected int or string, got {0}".format(arg))
-        for other_part in self.submobjects:
-            if other_part is part:
-                other_part.set_fill(opacity=1)
-            else:
-                other_part.set_fill(opacity=opacity)
+        super().__init__(*lines)
+
+        self.arrange(DOWN, buff=buff, aligned_edge=aligned_edge)
+
+    def fade_all_but(self, index: int, opacity: float = 0.25) -> None:
+        for i, part in enumerate(self.submobjects):
+            part.set_fill(opacity=(1.0 if i == index else opacity))
 
 
-class TexTextFromPresetString(TexText):
+class TexTextFromPresetString(MTexText):
     tex: str = ""
     default_color: ManimColor = WHITE
 
@@ -67,11 +54,11 @@ class TexTextFromPresetString(TexText):
         )
 
 
-class Title(TexText):
+class Title(MTexText):
     def __init__(
         self,
         *text_parts: str,
-        scale_factor: float = 1.0,
+        font_size: int = 72,
         include_underline: bool = True,
         underline_width: float = FRAME_WIDTH - 2,
         # This will override underline_width
@@ -80,9 +67,8 @@ class Title(TexText):
         underline_style: dict = dict(stroke_width=2, stroke_color=GREY_C),
         **kwargs
     ):
-        super().__init__(*text_parts, **kwargs)
-        self.scale(scale_factor)
-        self.to_edge(UP)
+        super().__init__(*text_parts, font_size=font_size, **kwargs)
+        self.to_edge(UP, buff=MED_SMALL_BUFF)
         if include_underline:
             underline = Line(LEFT, RIGHT, **underline_style)
             underline.next_to(self, DOWN, buff=underline_buff)