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Code Issues Projects Releases Packages Wiki Activity Actions 2

fix(image): avoid nested math environments (#2345)

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## Description

Inline LaTeX equation preview renders equations twice, partly on top of
each other, if you use nested math environments. Minimal reproducer:

```latex
\documentclass{article}
\begin{document}
\begin{equation}
  \begin{aligned}
    x_+ &= \frac{-b + \sqrt{b^2 - 4ac}}{2a} \, , \\
    x_- &= \frac{-b - \sqrt{b^2 - 4ac}}{2a} \, .
  \end{aligned}
\end{equation}
\end{document}
```

While, adding a test case for this to `test.tex` I also corrected a
package name such that it compiles without error.

## Screenshots

**Before**
<img width="248" height="203" alt="Screenshot 2025-10-24 at 16 22 05"
src="https://github.com/user-attachments/assets/ab55ef8c-1f04-49e5-b731-95b638ac9db7"
/>

**After**
<img width="248" height="203" alt="Screenshot 2025-10-24 at 16 23 33"
src="https://github.com/user-attachments/assets/4d3d53f6-7122-452f-b891-5a712f79fe40"
/>
This commit is contained in:
Daniel Wennberg 2025-10-29 06:47:52 -07:00 • committed by GitHub
parent 2a1a001d3a
commit 66e3dc4619
No known key found for this signature in database
GPG key ID: B5690EEEBB952194
4 changed files with 9 additions and 16 deletions
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2
queries/latex/images.scm
View file

@ -9,7 +9,7 @@
((math_environment
(#set! image.ext "math.tex"))
@image.content @image
(#not-has-ancestor? @image "displayed_equation"))
(#not-has-ancestor? @image "displayed_equation" "math_environment"))
(graphics_include
(_ (path) @image.src)

2
tests/image/test.aux
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@ -1,6 +1,6 @@
\relax
\@writefile{toc}{\contentsline {section}{\numberline {1}Image Tests}{1}{}\protected@file@percent }
\@writefile{lof}{\contentsline {figure}{\numberline {1}{\ignorespaces Test image centered in a figure environment.}}{1}{}\protected@file@percent }
\newlabel{fig:test_image}{{1}{1}{}{}{}}
\newlabel{fig:test_image}{{1}{1}{}{figure.1}{}}
\@writefile{toc}{\contentsline {section}{\numberline {2}Some beautiful mathematical equations}{2}{}\protected@file@percent }
\gdef \@abspage@last{4}

BIN
tests/image/test.pdf
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21
tests/image/test.tex
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@ -1,5 +1,5 @@
\documentclass{article}
\usepackage{graphics, amsmath, amssymb, multirow}
\usepackage{graphicx, amsmath, amssymb, multirow}
\usepackage{geometry}
\geometry{
a4paper,
@ -78,19 +78,12 @@ Fourier transform:
Maxwell's equations:
\begin{equation}
\nabla \times \textbf{E}=\frac{\rho}{\epsilon_0}
\end{equation}
\begin{equation}
\nabla \cdot \textbf{H}=0
\end{equation}
\begin{equation}
\nabla \times \textbf{E}=-\frac 1c\frac{\partial \textbf{H}}{\partial t}
\end{equation}
\begin{equation}
\nabla \times \textbf{H}=\frac 1c\frac{\partial \textbf{E}}{\partial t}
\begin{aligned}
\nabla \times \textbf{E}&=\frac{\rho}{\epsilon_0} \\
\nabla \cdot \textbf{H}&=0 \\
\nabla \times \textbf{E}&=-\frac 1c\frac{\partial \textbf{H}}{\partial t} \\
\nabla \times \textbf{H}&=\frac 1c\frac{\partial \textbf{E}}{\partial t}
\end{aligned}
\end{equation}
Schroedinger equation: