# NonGNU ELPA - cdlatex

## cdlatex

Description
Fast input methods for LaTeX environments and math
Latest
cdlatex-4.14.tar, 2022-Aug-23, 110 KiB
Maintainer
Carsten Dominik <carsten.dominik@gmail.com>
Website
https://elpa.nongnu.org/nongnu/cdlatex.html
Browse repository
CGit or Gitweb

To install this package, run in Emacs:

M-x package-install RET cdlatex RET

## Full description

Commentary:

CDLaTeX is a minor mode supporting fast insertion of environment
templates and math stuff in LaTeX.

To turn CDLaTeX Minor Mode on and off in a particular buffer, use
M-x cdlatex-mode'.

To turn on CDLaTeX Minor Mode for all LaTeX files, add one of the
following lines to your .emacs file:

(add-hook 'LaTeX-mode-hook #'turn-on-cdlatex)   ; with AUCTeX LaTeX mode
(add-hook 'latex-mode-hook #'turn-on-cdlatex)   ; with Emacs latex mode

For key bindings, see further down in this documentation.

CDLaTeX requires texmathp.el (which is distributed with AUCTeX) to
auto-insert $...$ when needed, so we recommend you install AUCTeX to get
this functionality.

--------------------------------------------------------------------------

OVERVIEW
========

CDLaTeX is a minor mode supporting mainly mathematical and scientific
text development with LaTeX.  CDLaTeX is really about speed.  AUCTeX
(the major mode I recommend for editing LaTeX files) does have a hook
based system for inserting environments and macros - but while this is
useful and general, it is sometimes slow to use.  CDLaTeX tries to be
quick, with very few and easy to remember keys, and intelligent
on-the-fly help.

1. ABBREVIATIONS.
-------------
CDLaTeX has an abbrev-like mechanism to insert full LaTeX
environments and other templates into the buffer.  Abbreviation
expansion is triggered with the TAB key only, not with SPC or RET.
For example, typing "ite<TAB>" inserts an itemize environment.  A
full list of defined abbreviations is available with the command
C-c ?' (cdlatex-command-help').

1a. ENVIRONMENT TEMPLATES
---------------------
Typing C-c {' (cdlatex-environment') uses the minibuffer to
complete the name of a LaTeX environment and inserts a template
for this environment into the buffer.  These environment
templates also contain labels created with RefTeX.  In a
template, text needs to be filled in at various places, which we
call "points of interest".  You can use the TAB key to jump to
the next point of interest in the template.  If there is an
active region, the region will be wrapped into the environment,
ignoring the template content.

For many frequently used LaTeX environments, abbreviations are
available.  Most of the time, the abbreviation consists of the
first three letters of the environment name: equ<TAB>' expands
into
$$\label{eq:1}$$

Similarly, ali<TAB>' inserts an AMS-LaTeX align environment
template etc.  For a full list of environment abbreviations, use
C-c ?'.

Use the command C-c -' (cdlatex-item') to insert a generalized
new "item" in any "list"-like environment.  For example, in an
itemize environment, this inserts "\item", in an enumerate
environment it inserts "\item\label{item:25}" and in an eqnarray
environment, it inserts "\label{eq:25} \n & &".  When
appropriate, newlines are inserted, and the previous item is also
closed with "\\".  cdlatex-item' can also be invoked with the
abbreviation "it<TAB>".

1b. MATH TEMPLATES
--------------
Abbreviations are also used to insert simple math templates
into the buffer.  The cursor will be positioned properly.  For
example, typing fr<TAB>' will insert "\frac{}{}" with the
cursor in the first pair of parenthesis.  Typing lr(<TAB>'
will insert a "\left( \right)" pair and position the cursor in
between, etc.  Again, the TAB key can be used to jump to the
points in the template where additional text has to be
inserted.  For example in the \frac{}{}' template, it will
move you from the first argument to the second and then out of
the second.  For a list of available templates, type C-c ?'.
As a special case, the left-right parenthesis combinations can
also be applied after writing the content by selecting the
content and typing '( or '[ or '{ or '< or '| .

2. MATHEMATICAL SYMBOLS
--------------------
This feature is similar to the functionality in the Math minor mode
of AUCTeX, and to the input methods of the X-Symbol package.  It is
introduced by the backquote character.  Backquote followed by any
character inserts a LaTeX math macro into the buffer.  If
necessary, a pair of "$" is inserted to switch to math mode. For example, typing "a" inserts "$\alpha$". Since LaTeX defines many more mathematical symbols than the alphabet has letters, different sets of math macros are provided. We call the different sets "levels". On each level, another LaTeX macro is assigned to a given letter. To select the different levels, simply press the backquote character several times before pressing the letter. For example, typing "d" inserts "\delta" (level 1), and typing "d" inserts "\partial" (level 2). Similarly, "e" inserts "\epsilon" and "e" inserts "\vareppsilon". On each level, on-thy-fly help will pop up automatically if you hesitate to press the next key. The help screen is a window which lists all math macros available on the current level. Initially, when you type slowly, this window will pop up each time you press backquote. However, after you have learned the different keys, you will type more quickly and the help window is not shown. Try it out: First press "" (backquote), wait for the help window and then press "a" to get "\alpha". Then press "" and "b" as a quick sequence to get "\beta", without the help window. The LaTeX macros available through this mechanism are fully configurable - see the variable cdlatex-math-symbol-alist'. 3. ACCENTS AND FONTS ----------------- Putting accents on mathematical characters and/or changing the font of a character uses key combinations with the quote character "'" as a prefix. The accent or font change is applied to the character or LaTeX macro *before* point. For example Keys Result -------------------------------------------------------------------- a'~ ERROR % in text mode$a'~                            \tilde{a}             % in math mode
a':                             \ddot{a}
ab'b                            \textbf{ab}           % in text mode
$ab'b a\mathbf{b} % in math mode \alpha'. \dot{\alpha} r_{dust}'r r_\mathrm{dust} % in math mode <SPC> 'e \emph{} this is important M-2 'b this \textbf{is important} As you can see: - using math accents like ~ outside math mode will throw an error. - the font change used automatically adapts to math mode. - if the item before point is a LaTeX macro, the change applies to the whole macro. - in text mode, the change applies to the entire word before point, while in math mode only the last character is modified. - if the character before point is white space, a dollar or an opening parenthesis, this command just opens an empty template and positions the cursor inside. - when a numeric prefix argument is supplied, the command acts on whole words before the cursor. - Furthermore, if there is an active region, the change will apply to the content of that region. In order to insert a normal quote, you can press the quote character twice. Also, if the key character is not associated with an accent or font, the quote will be inserted. For example, "'t" and "'s" insert just that, so that normal text typing will not be disturbed. Just like during the insertion of math macros (see above under (4.)), automatic on-the-fly help will pop up when you pause after hitting the quote character, but will be suppressed when you continue quickly. The available accents and also the prefix key can be can be configured - see documentation of the variables cdlatex-math-modify-alist' and cdlatex-math-modify-prefix'. 4. PAIR INSERTION of (), [], {}, and$$------------------------------------ Dollars and parens can be inserted as pairs. When you type the opening delimiter, the closing delimiter will be inserted as well, and the cursor positioned between them. You can configure which delimiter are inserted pairwise by configuring the variable cdlatex-paired-parens'. Also, the keys _' and ^' will insert "_{}" and "^{}", respectively, and, if necessary, also a pair of dollar signs to switch to math mode. You can use TAB to exit paired parenthesis. As a special case, when you use TAB to exit a pair of braces that belong to a subscript or superscript, CDLaTeX removes the braces if the sub/superscript consists of a single character. For example typing "$10^3<TAB>" inserts "$10^3$", but typing "$10^34<TAB>" inserts "$10^{34}$". If you press _' or ^' twice, the template inserted will be _{\mathrm{}}' or ^{\mathrm }', respectively, to insert a roman sub/super-script. Style guides require that all sub- and superscripts that are descriptive (so not a mathematical or physical quantity themselves) need to be roman. So$x_i$is i is an index, but$x_{\rm max}$to indicate the maximum value. You can disable this behavior through the variable cdlatex-make-sub-superscript-roman-if-pressed-twice'. 5. THE OVERLOADED TAB KEY ---------------------- You may have noticed that we use the TAB key for many different purposes in this package. While this may seem confusing, I have gotten used to this very much. Hopefully this will work for you as well: "when in doubt, press TAB". Here is a summary of what happens when you press the TAB key: The function first tries to expand any abbreviation before point. If there is none, it cleans up short subscripts and superscripts at point. I.e., is the cursor is just before the closing brace in "a^{2}", it changes it to "a^2", since this is more readable. If you want to keep the braces also for simple superscripts and subscripts, set the variable cdlatex-simplify-sub-super-scripts' to nil. After that, the TAB function jumps to the next point of interest in a LaTeX text where one would reasonably expect that more input can be put in. This does *not* use special markers in the template, but a heuristic method which works quite well. For the detailed rules which govern this feature, check the documentation of the function cdlatex-tab'. ----------------------------------------------------------------------------- CONFIGURATION EXAMPLES ====================== Check out the documentation of the variables in the configuration section. The variables must be set before cdlatex-mode is turned on, or, at the latext, in cdlatex-mode-hook', in order to be effective. When changing the variables, toggle the mode off and on to make sure that everything is up to date. Here is how you might configure CDLaTeX to provide environment templates (including automatic labels) for two theorem-like environments. (setq cdlatex-env-alist '(("axiom" "\\begin{axiom}\nAUTOLABEL\n?\n\\end{axiom}\n" nil) ("theorem" "\\begin{theorem}\nAUTOLABEL\n?\n\\end{theorem}\n" nil))) The "AUTOLABEL" indicates the place where an automatic label should be inserted, using RefTeX. The question mark defines the position of the cursor after the template has been inserted into the buffer. You could also define your own keyword commands "axm" and "thr" to make the template insertion quicker (e.g. axm<TAB>' and thm<TAB>'): (setq cdlatex-command-alist '(("axm" "Insert axiom env" "" cdlatex-environment ("axiom") t nil) ("thr" "Insert theorem env" "" cdlatex-environment ("theorem") t nil))) Here is how to add new math symbols to CDLaTeX's list: In order to put all rightarrow commands onto >, >, >, and > (i.e. several backquotes followed by >) and all leftarrow commands onto '<, <, <, and <, you could do this in .emacs: (setq cdlatex-math-symbol-alist '((?< ("\\leftarrow" "\\Leftarrow" "\\longleftarrow" "\\Longleftarrow")) (?> ("\\rightarrow" "\\Rightarrow" "\\longrightarrow" "\\Longrightarrow")) )) To change the prefix key for math accents and font switching, you could do something like (setq cdlatex-math-modify-prefix [f7]) ----------------------------------------------------------------------------- KEY BINDINGS Here is the default set of keybindings from CDLaTeX. A menu is also installed.$         cdlatex-dollar
(         cdlatex-pbb
{         cdlatex-pbb
[         cdlatex-pbb
|         cdlatex-pbb
<         cdlatex-pbb
^         cdlatex-sub-superscript
_         cdlatex-sub-superscript

TAB       cdlatex-tab
C-c ?     cdlatex-command-help
C-c {     cdlatex-environment
C-c -     cdlatex-item
         cdlatex-math-symbol
'         cdlatex-math-modify

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## Old versions

 cdlatex-4.13.tar.lz 2022-Aug-19 21.3 KiB cdlatex-4.12.tar.lz 2022-Jul-11 20.5 KiB