[FR] Support showing latex fragments in helm search buffer about org-rifle HOT 10 OPEN

I'm guessing that this would be possible, but I don't know anything about it, so I'll have to look into it. I have very little knowledge of LaTeX as well... :)

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To toggle LaTeX fragments preview in Org-mode buffer, there is an option (setq org-startup-with-latex-preview t) or function org-toggle-latex-fragment to toggle latex fragments preview.

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I tried (add-hook 'helm-org-rifle-after-init-hook #'org-toggle-latex-fragment) But it report error:

Debugger entered--Lisp error: (wrong-type-argument stringp nil)
  looking-at(nil)
  org-element-context()
  org-toggle-latex-fragment()
  run-hooks(h-after-init-hook157)
  helm-log-run-hook(h-after-init-hook157)

I remember that this seems because org-toggle-latex-fragment does not support in non-file buffer.

from org-rifle.

Adding it to that hook won't work, because when that hook is run, the Helm buffer is empty.

However, I just pushed the branch https://github.com/alphapapa/helm-org-rifle/tree/latex-preview which calls org-preview-latex-fragment in the fontifying function. I doubt that it will work, but please give it a try and let me know. :)

from org-rifle.

It does not work after tested.

from org-rifle.

Thanks. I can't promise anything, but if you have time, could you send me a small sample Org file with some LaTeX fragments that you would want to show up?

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#+STARTUP: latexpreview

* LaTeX symbol -- \[ \LaTeX \]

#+BEGIN_SRC latex
\LaTeX
#+END_SRC


* Mathematics

** Complex Formulas Examples -- \[ \begin{equation} .. \end{equation} \]

\begin{equation}
\operatorname{dist}_c = \frac{2}{N(N+1)} \sum_{i \leqslant N} \sum_{j \geqslant i} \operatorname{dist}(i,j)
\end{equation}


\begin{equation}
C(i) = \frac{3(K-2)}{4(K-1)} \approx \frac34
\end{equation}


\begin{eqnarray*}
\hat{f}(x) & \propto & \sum_{\nu} \frac{|F(\nu)H(\nu)|^2}{|N(\nu)|^2}  
           \frac{G(\nu)}{H(\nu)} e^{\frac{2 \pi i \nu x}{N}}\\
           & \propto & \sum_{\nu} \frac{|F(\nu)|^2}{|N(\nu)|^2} H(\nu) H^*(\nu) 
           \frac{G(\nu)}{H(\nu)} e^{\frac{2 \pi i \nu x}{N}}\\
           & \propto & \sum_{\nu} H^*(\nu) G(\nu) e^{\frac{2 \pi i \nu x}{N}}
\end{eqnarray*}

** Symbols

- [[file+sys:Data/docs/The%20Comprehensive%20LaTeX%20Symbol%20List.pdf][The Comprehensive LaTeX Symbol List (PDF)]]

*** Operators

- \[ \pm \]
- \[ \mp \]
- \[ \times \]
- \[ \div \]
- \[ \cdot \]
- \[ \ast \]
- \[ \star \]
- \[ \dagger \]
- \[ \ddagger \]
- \[ \land \]
- \[ \wedge \]
- \[ \vee \]
- \[ \amalg \]
- \[ \cap \]
- \[ \cup \]
- \[ \uplus \]
- \[ \sqcap \]
- \[ \sqcup \]
- \[ \oplus \]
- \[ \ominus \]
- \[ \otimes \]
- \[ \circ \]
- \[ \bullet \]
- \[ \diamond \]
- \[ \lhd \]
- \[ \rhd \]
- \[ \unlhd \]
- \[ \unrhd \]
- \[ \oslash \]
- \[ \odot \]
- \[ \bigcirc \]
- \[ \triangleleft \]
- \[ \triangleright \]
- \[ \Diamond \]
- \[ \bigtriangleup \]
- \[ \bigtriangledown \]
- \[ \Box \]
- \[ \setminus \]
- \[ \wr \]
- \[ x^{\circ} \]

from org-rifle.

@alphapapa Have you tried my org file example?

from org-rifle.

Hi, sorry for the wait. I just did some experimenting, but I don't think it is feasible to do this.

Generating a preview for a fragment is slow, requiring writing multiple files to disk (at least 3, IIUC: one for the temporary org buffer, one for the generated DVI file, and another for the converted PNG file). This would be very slow for showing a number of fragments.

It might be possible to show already-generated fragment previews, but I'd have to 1) learn how Emacs handles displaying images in buffers, 2) figure out how to find images in buffers, 3) find out how to associate them with fragments that are in search results, and then 4) try to display them in a Helm buffer as a candidate. And I'm not sure if 4 is even possible.

If it is possible, it would be many hours of work for a feature that I don't think many people would use (and I wouldn't have any use for it, myself).

I'm sorry to disappoint you. I'd like to add it and make it more useful for you, but it's not feasible for me to do so. I'll leave the feature request open in case someone else wants to try someday. :)

P.S. If you have a few minutes, I'd appreciate help testing #11. :)

from org-rifle.

I see, thanks for your diving in. I might try this someday.

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