How to get literal forward slashes in org-mode? - org-mode

In text, can I make org-mode ignore forward slashes somehow? Phonetics uses /s/ to denote a certain level of analysis.

I assume that you do not want the text to appear emphasized in the buffer, nor in the output. This is a slightly more complex answer which will achieve that result:
There is a variable defined by Org-mode called org-emphasis-alist which defines the different emphasis modes, what their plain-text syntaxes are, and how they are exported to HTML. You can achieve the result you want by changing the value of this variable before Org-mode has been loaded. That last part is critical so note it well—Org-mode reads the value of org-emphasis-alist when it is loaded and uses that value to generate a regular expression for highlighting ("font-lock") purposes.
Here are two routes to that:
Add the following lines to your .emacs file above the lines that load Org-mode:
(setq org-emphasis-alist
`(("*" bold "<b>" "</b>")
;; ("/" italic "<i>" "</i>")
("_" underline "<span style=\"text-decoration:underline;\">" "</span>")
("=" org-code "<code>" "</code>" verbatim)
("~" org-verbatim "<code>" "</code>" verbatim)
("+" ,(if (featurep 'xemacs) 'org-table '(:strike-through t))
"<del>" "</del>")))
(Notice the commented out line.)
Make the change through Emacs' customization facility:
M-x customize RET
In the search box enter Org Emphasis and click Search.
Click the down arrow next to Org Emphasis Alist to reveal its value.
Find and click the second DEL button—corresponding to the italic list item.
Click the Save for future sessions button at the top of the buffer.

You can use
#+OPTIONS: *:nil
to turn off text-emphasis (bold,italics,underline). This will however only work on export itself, the emphasis will still be visible.
See the manual for other export options.

If you like the standard emphasis functionality of the forward slashes in org-mode, you could also just define a new environment. I put something like the following in the preamble whenever I do phonetics/phonology typesetting:
\newcommand\uRep[1]{$/$\textipa{#1}$/$}

Related

Mark-up for bold and italic in emacs org-mode

In emacs org-mode, we can use mark-ups to set Emphasis and monospace.
e.g.
*bold*
/italic/
How can we make a word both bold and italic?
It seems neither */.../* nor /*...*/ works.
In fact, both of these do work.
/*test*/
exports to HTML as
<i><b>test</b></i>
*/test/* works similarly. LaTeX / PDF export also works as you expect.
Org itself doesn't fontify both the bold and italic, but the semantics are fine.
Expanding on #Chris answer covering semantics being there, if you're interested in visible fontification effect inside your org notes, you have three approaches:
Highlight parts of your text
Nesting works nicely as long as you don't need to start / end two tags at once.
Use multiple tags with escape symbols
The closest you can get is
The code is:
*\ /\ _\ ~fontification can be nested~\_\/\*
So you need \​​ ​ (backslash and space) to escape following opening tags and \ (backslash) to escape following closing tags.
The need for space is annoying, and in it looks like this when exported to html:
So yes, you can have multiple mark-ups at once, but you have to choose between seeing the effect in emacs or having it nicely formated on export.
Modify how markup looks in emacs
Alternatively you could change how mark-up looks in emacs without modyfing exporting format, i.e. to make bold look red you'd need this:
(add-to-list 'org-emphasis-alist
'("*" (:foreground "red")
))
as covered in this great question and answer.

LaTeX math mode ($...$) font color in org mode

I have just started using org-mode and it looks awesome. The only issue that I have so far is that when I write a text in mathmode ($...$) it appears in the standard-text font color.
So, I would like to make org-mode to identify the mathmode text and be able to present it in some other color. Note that I don't need to change the color of the actual equation, just the source text in org-mode.
Here is an example of how the text is currently presented
A paper by Rohnert, titled "Moving a disc between polygons" introduces
a structure using which one can generate a solution (path) for
a given query in $O(\log n) + k$ time.
and how I would like it to look
A paper by Rohnert, titled "Moving a disc between polygons" introduces
a structure using which one can generate a solution (path) for
a given query in $O(\log n) + k$ time.
(Note that I would prefer to display in some given color, e.g. red, and not bold face.)
In Emacs version 24.4 and later, this is controlled via the variable org-highlight-latex-and-related:
Non-nil means highlight LaTeX related syntax in the buffer. When non
nil, the value should be a list containing any of the following
symbols:
`latex' Highlight LaTeX snippets and environments.
`script' Highlight subscript and superscript.
`entities' Highlight entities.
So something like
(eval-after-load 'org
'(setf org-highlight-latex-and-related '(latex)))
in your init should help. Such code is formatted according to the face org-latex-and-related.
In earlier versions, the variable org-highlight-latex-fragments-and-specials, which is a simpler nil / non-nil variable:
(eval-after-load 'org
'(setf org-highlight-latex-fragments-and-specials t))
In this case, the face org-latex-and-export-specials is used.

Disable certain org mode markup

I want to be able to disable strikethrough happening when I type + in an org-mode document. Specifically it is for entries in a table. Is there an easy way of doing this for a specific org-mode document since I only want to disable it for one document in particular. If not a way to toggle this would be nice.
I know I can have a literal + symbol with \plus but I would like to be able to see it in the document rather than reading the \plus.
To disable strikethrough in a specific file, add the following to your file:
-*- org-emphasis-alist: (("*" bold) ("/" italic) ("_" underline) ("=" org-verbatim verbatim) ("~" org-code verbatim) ("+" (:strike-through nil))); -*-
The down-side is that it will complain that the file may contain values that are not safe (see here). You can also use the longer version at the bottom of your file, as mentioned here.
To do it for all your org files is a simpler, and will not ask questions:
(setq org-emphasis-alist (quote (("*" bold "<b>" "</b>")
("/" italic "<i>" "</i>")
("_" underline "<span style=\"text-decoration:underline;\">" "</span>")
("=" org-code "<code>" "</code>" verbatim)
("~" org-verbatim "<code>" "</code>" verbatim))))
Sources: Bernt Hansen's org-mode notes(a must-read) and the org manual
I was able to do it by using local variables in the file
# Local Variables:
# org-emphasis-alist: (everything but strike through)
# End:
You can set org-emphasis-alist for just one file:
-*- org-emphasis-alist: nil -*-
+not struckout+
Of course, this removes all emphasis (bold, italic, etc.). I cannot figure out how to remove just strikeout in just one file (specifically, I can't figure out how to delete an element of the alist locally).
You might be able to achieve this by defining an overlay (+) for the literal plus (\plus). There is a library called "Auto Overlays" that
allows you to define overlays that are created (and updated and destroyed) automatically when text in a buffer matches a regular expression
(quoted from the home page of the author).
You can download a standalone version of the library from here. If you are on Emacs 24 and have the Marmalade Repo enabled, you can install the predictive package via
M-x package-install RET predictive RET
which apparently includes "Auto Overlays".
The documentation for this library is here.

FlySpell in Org-Mode recognize latex syntax like auctex

Original Response:
I was trying to figure out how in auctex mode latex doesn't seem to highlight any latex functions with flyspell turned on. Is this a custom dictionary file or how is this implemented? Can this be easily incorporated into an org-mode file so it doesn't highlight inserted latex code that will get exported.
Edit:
Simple example taken from top of file and in the text. Basically so latex syntax like ref or label inside {} won't be spell checked (this has been fixed by using (setq ispell-parser tex). Then also setting up a function that specific labels with #+ as the first text on the line won't be checked. I would want the caption checked but not #+LABEL: or #+TYP_TODO: (not shown. Also a way to add TODO keywords to not get checked. I can think of a way to do this is on startup add these to the LOCALWORDS: ispell places at the bottom of the file if not already there but is there an easier or better way to do this.
#+TAGS: NOTE REPORT export noexport MEETING
#+TYP_TODO: TODO Weekly WAITING NEXT | Meeting DONE
#+STARTUP: hidestars content hideblocks
The exponential running mean is shown for various alpha values in Figure \ref{fig:saturation_varying_alphaval_00f6set2}.
#+CAPTION: Plot of varying alpha values for the exponential running mean ($EM$) with $S_{min} = 0.0008 \text{ and } P_m = 0.20$
#+LABEL: fig:saturation_varying_alphaval_00f6set2
#+ATTR_LaTeX: width=0.4\textwidth placement=[h!tb]
flyspell internally uses ispell-mode. To change the way that ispell parses files set the variable ispell-parser to 'tex.
(add-hook 'org-mode-hook (lambda () (setq ispell-parser 'tex)))
Most likely auctex is using flyspell-mode-predicate to define what portions of the buffer shouldn't be spellchecked. (This answer shows how to do something similar for MoinMoinWiki.) org-mode already has such a function, org-mode-flyspell-verify, which apparently doesn't work properly for you... A quick look at the source suggests that org-remove-flyspell-overlays-in should be called for buffer portions containing code samples etc.
Sorry about the handwavy answer; marking this as community wiki to invite improvements.

How to make part of a word bold in org-mode

How can I make org-mode markup work for a part of a word? For example, I'd like it to work for cases like this:
=Class=es
and this:
/Method/s
Based on my tests it seems like org-mode markup syntax works on complete words only.
These days, there is a way to do this (without using quoted HTML tags):
(setcar org-emphasis-regexp-components " \t('\"{[:alpha:]")
(setcar (nthcdr 1 org-emphasis-regexp-components) "[:alpha:]- \t.,:!?;'\")}\\")
(org-set-emph-re 'org-emphasis-regexp-components org-emphasis-regexp-components)
Explanation
The manual says that org-emphasis-regexp-components can be used to
fine tune what characters are allowed before and after the markup characters [...].
It is a list containing five entries. The first entry lists characters that are allowed to immediately precede markup characters, and the second entry lists characters that are allowed to follow markup characters. By default, letters are not included in either one of these entries. So in order to successfully apply formatting to strings immediately preceded or followed by a letter, we have to add [:alpha:] (which matches any letter) to both entries.
This is what the calls to setcar do. The purpose of the third line is to rebuild the regular expression for emphasis based on the modified version of org-emphasis-regexp-components.
I don't think you can do it so that it shows up in the buffer as bold. If you just need it so that it appears bold when you export it to html, you can use:
th#<b>is is ha#</b>lf bold
See Quoting HTML tags
No, you can't do that. I searched for the same solution before and found nothing. A (very) bad hack is to do something like *Class* es (with a whitespace).
Perhaps you can write a short message to the creator, Carsten Dominik (Homepage), and ask him for a solution. He seems to be a nice guy.
A solution that has not been mentioned is to use a unicode zero width space (U+200B) in between the desired bolded and unbolded parts of a word.
To get the desired bolding of the word "Classes":
Type 'Class*es' in the buffer (without quotes).
Move the cursor between the '*' and 'e' characters.
Press C-x 8 RET (to execute the insert-char command).
Type 'zero width space' (without quotes) and press RET.
Move the cursor to the beginning of the word and insert a '*' character.
The word "Classes" should now have the desired appearance.
Note that there is the possibility that this will cause problems when exporting.
src_latex{\textbf{Class}es and \textit{Method}s}
Building up on the previous excellent answer
I had to modify it a bit in order to make it work with spacemacs. Indeed, from the spacamacs org-layer documentation, available here, we can read
Because of autoloading, calling to org functions will trigger the
loading up of the org shipped with emacs which will induce conflicts.
One way to avoid conflict is to wrap your org config code in a
with-eval-after-load block [...]
So, I put the following lines inside my dotspacemacs/user-config ()
(eval-after-load "org"
'(progn
(setcar org-emphasis-regexp-components " \t('\"{[:alpha:]")
(setcar (nthcdr 1 org-emphasis-regexp-components) "[:alpha:]- \t.,:!?;'\")}\\")
(org-set-emph-re 'org-emphasis-regexp-components org-emphasis-regexp-components)
))