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fix(code): inherit container background and adjust line number color

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Using a custom `formatter_style` (such as a light theme) was previously overridden by the hardcoded dark `#222` default `fill_color`. This change dynamically extracts the native `background_color` attribute from the specified Pygments style to ensure the container matches the theme.

Additionally, updated the line number color logic: it now respects the color defined by the active Pygments style, falling back to `GRAY` if unspecified, preventing invisible white text on light backgrounds.

Fixes #4811
This commit is contained in:
Helbronner 2026-06-17 16:09:57 +08:00
commit f9079e3619
1 changed files with 18 additions and 3 deletions
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21
manim/mobject/text/code_mobject.py
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@ -14,7 +14,7 @@ from bs4 import BeautifulSoup, Tag
from pygments import highlight
from pygments.formatters.html import HtmlFormatter
from pygments.lexers import get_lexer_by_name, guess_lexer, guess_lexer_for_filename
from pygments.styles import get_all_styles
from pygments.styles import get_all_styles, get_style_by_name
from manim.constants import *
from manim.mobject.geometry.arc import Dot
@ -22,7 +22,7 @@ from manim.mobject.geometry.shape_matchers import SurroundingRectangle
from manim.mobject.opengl.opengl_compatibility import ConvertToOpenGL
from manim.mobject.types.vectorized_mobject import VGroup, VMobject
from manim.typing import StrPath
from manim.utils.color import WHITE, ManimColor
from manim.utils.color import BLACK, GRAY, WHITE, ManimColor
class Code(VMobject, metaclass=ConvertToOpenGL):
@ -107,7 +107,7 @@ class Code(VMobject, metaclass=ConvertToOpenGL):
_styles_list_cache: list[str] | None = None
default_background_config: dict[str, Any] = {
"buff": 0.3,
"fill_color": ManimColor("#222"),
"fill_color": None,
"stroke_color": WHITE,
"corner_radius": 0.2,
"stroke_width": 1,
@ -203,6 +203,7 @@ class Code(VMobject, metaclass=ConvertToOpenGL):
paragraph_config = {}
base_paragraph_config = self.default_paragraph_config.copy()
base_paragraph_config.update(paragraph_config)
base_paragraph_config.update({"color": BLACK})
from manim.mobject.text.text_mobject import Paragraph
@ -214,8 +215,16 @@ class Code(VMobject, metaclass=ConvertToOpenGL):
for start, end, color in color_range:
line[start:end].set_color(color)
selected_style = get_style_by_name(formatter_style)
if add_line_numbers:
base_paragraph_config.update({"alignment": "right"})
line_number_color: str = selected_style.line_number_color
if line_number_color == "inherit":
base_paragraph_config.update({"color": GRAY})
else:
base_paragraph_config.update({"color": line_number_color})
self.line_numbers = Paragraph(
*[
str(i)
@ -239,6 +248,12 @@ class Code(VMobject, metaclass=ConvertToOpenGL):
background_config_base = self.default_background_config.copy()
background_config_base.update(background_config)
if background_config_base["fill_color"] is None:
background_color: str = selected_style.background_color
background_config_base.update({"fill_color": background_color})
else:
background_config_base.update({"fill_color": ManimColor("#222")})
if background == "rectangle":
self.background = SurroundingRectangle(
self,