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fix(code): inherit container background and adjust line number color #4816

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fix(code): inherit container background and adjust line number color #4816

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f9079e3
fix(code): inherit container background and adjust line number color
Helbronner Jun 17, 2026
dd6c87b
fix(code): respect user-defined fill_color for container background
Helbronner Jun 17, 2026
dd788fc
Merge branch 'main' into fix-code-background-color
Helbronner Jun 22, 2026
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19 changes: 16 additions & 3 deletions manim/mobject/text/code_mobject.py
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Original file line number Diff line number Diff line change
Expand Up @@ -14,15 +14,15 @@
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
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


class Code(VMobject, metaclass=ConvertToOpenGL):
Expand Down Expand Up @@ -107,7 +107,7 @@ def construct(self):
_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,
Expand Down Expand Up @@ -203,6 +203,7 @@ def __init__(
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

Expand All @@ -214,8 +215,16 @@ def __init__(
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)
Expand All @@ -239,6 +248,10 @@ def __init__(
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})

if background == "rectangle":
self.background = SurroundingRectangle(
self,
Expand Down
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