Hi Paul and Uwe,
>>>>> Paul Nelson <[email protected]> writes:
> As for the "always-align t" case, there are still some natural "broken"
> examples, as you know:
> #+begin_src latex
> \begin{equation*}
> g = \begin{pmatrix}
> a & b \\
> c & d \\
> \end{pmatrix},
> \quad
> h = \begin{pmatrix}
> x & y \\
> z & w \\
> \end{pmatrix}.
> \end{equation*}
> #+end_src
> #+begin_src latex
> The matrix $\begin{pmatrix}
> a & b \\
> c & d
> \end{pmatrix}$ has determinant
> \begin{equation*}
> a d - b c.
> \end{equation*}
> The matrix $\begin{pmatrix}
> a & b \\
> c & d
> \end{pmatrix}$ has determinant
> \begin{equation*}
> a d - b c.
> \end{equation*}
> The matrix $\begin{pmatrix}
> a & b \\
> c & d
> \end{pmatrix}$ has determinant
> \begin{equation*}
> a d - b c.
> \end{equation*}
> #+end_src
I've been gradually inclined to the attached approach. Namely, align "&"
as well as \end{foo} relative to beg-col, not beg-pos. In this way, the
above examples turn into
----------------------------------------------------------------------
\begin{equation*}
g = \begin{pmatrix}
a & b \\
c & d \\
\end{pmatrix},
\quad
h = \begin{pmatrix}
x & y \\
z & w \\
\end{pmatrix}.
\end{equation*}
----------------------------------------------------------------------
and
----------------------------------------------------------------------
The matrix $\begin{pmatrix}
a & b \\
c & d
\end{pmatrix}$ has determinant
\begin{equation*}
a d - b c.
\end{equation*}
The matrix $\begin{pmatrix}
a & b \\
c & d
\end{pmatrix}$ has determinant
\begin{equation*}
a d - b c.
\end{equation*}
The matrix $\begin{pmatrix}
a & b \\
c & d
\end{pmatrix}$ has determinant
\begin{equation*}
a d - b c.
\end{equation*}
----------------------------------------------------------------------
This patch indents as
\begin{equation}
n u m=\left[\begin{array}{ll}
2 & 25
\end{array}\right]
\end{equation}
, not the form Paul proposed
\begin{equation}
n u m=\left[\begin{array}{ll}
2 & 25
\end{array}\right]
\end{equation}
. Maybe Uwe doesn't like the former indentation, but it is more similar
to the behavior of other (non-tabular type) environments.
> With a bit more massaging, it should be possible to avoid these. I had in
> mind modifying LaTeX-indent-level-count (or the block surrounding where it
> is called) in \end{TABULAR} cases, adjusting by the difference between the
> matching \begin and its beginning of line.
A similar idea crossed my brain, too. The best position to modify would be
`LaTeX-indent-calculate-last'.
It would make the indent algorithm more complex, so I began to search
for more simple solution.
Regards,
Ikumi Keita
#StandWithUkraine #StopWarInUkraine
>From 5c87b9e72ceddf3459abe8f59e2c6b61316d71d8 Mon Sep 17 00:00:00 2001
From: Ikumi Keita <[email protected]>
Date: Fri, 8 Sep 2023 17:13:07 +0900
Subject: [PATCH] temporal commit
---
latex.el | 10 ++++++++--
1 file changed, 8 insertions(+), 2 deletions(-)
diff --git a/latex.el b/latex.el
index d855b5c5..9a5b753e 100644
--- a/latex.el
+++ b/latex.el
@@ -8884,6 +8884,12 @@ function would return non-nil and `(match-string 1)' would return
(LaTeX-find-matching-begin)
(cons (point) (current-column))))
+(defun LaTeX-env-beginning-pos-indent ()
+ "Return a cons: (POINT . INDENT) for current environment's beginning."
+ (save-excursion
+ (LaTeX-backward-up-environment)
+ (cons (point) (LaTeX-current-indentation))))
+
(defun LaTeX-hanging-ampersand-position (&optional pos col)
"Return indent column for a hanging ampersand (that is, ^\\s-*&).
When you know the position and column of the beginning of the
@@ -8893,7 +8899,7 @@ COL for efficiency."
(beg-pos . beg-col)
(if pos
(cons pos col)
- (LaTeX-env-beginning-pos-col))
+ (LaTeX-env-beginning-pos-indent))
(let ((cur-pos (point)))
(save-excursion
(if (and (search-backward "\\\\" beg-pos t)
@@ -8924,7 +8930,7 @@ COL for efficiency."
"Return indent column for the current tabular-like line."
(cl-destructuring-bind
(beg-pos . beg-col)
- (LaTeX-env-beginning-pos-col)
+ (LaTeX-env-beginning-pos-indent)
(let ((tabular-like-end-regex
(format "\\\\end{%s}"
(regexp-opt
--
2.41.0
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