code.delx.au - gnu-emacs-elpa/blob - packages/nameless/README.org

   1 #+OPTIONS: toc:nil num:nil
   2
   3 * Nameless --- /less is more/
   4 *Hide package namespaces in your emacs-lisp code.*
   5
   6 Simply put, turn on this minor mode, and the namespace prefix of the
   7 package you’re editing will be hidden by a ~:~. Here’s a comparison.
   8 The image to the *left* is what you normally see. The image to
   9 the *right* has ~nameless-mode~ turned on.\\
  10  [[file:example-nameless.png]]
  11
  12 ** Usage
  13
  14 To use this package add the following configuration to your Emacs init file.
  15
  16 #+BEGIN_SRC emacs-lisp
  17 (add-hook 'emacs-lisp-mode-hook #'nameless-mode-from-hook)
  18 #+END_SRC
  19
  20 You can configure a string to use instead of ~:~ by setting the
  21 ~nameless-prefix~, and the name of the face used is ~nameless-face~.
  22 You can even just hide the prefix completely by setting this variable
  23 to an empty string.
  24
  25 While the mode is active, the =C-c C--= key inserts the
  26 package namespace if appropriate.
  27
  28 * Configuration
  29
  30 ** Quickly typing the namespace
  31 ~nameless-mode~ binds the =C-c C--= key to
  32 ~nameless-insert-name~, which immediately inserts the current name for
  33 you, or even expands aliases to the names they point to.
  34
  35 Let’s say you’re in a file called ~foo-bar.el~.
  36 #+BEGIN_SRC text
  37    C-c C-- → foo-bar-
  38 fl C-c C-- → font-lock-
  39 #+END_SRC
  40
  41 There’s also a command called ~nameless-insert-name-or-self-insert~.
  42 You can bind this to the =_= key and make it even faster to
  43 insert the name.
  44 ** Configuring the namespace name
  45 Nameless guesses the package name with the ~lm-get-package-name~
  46 function, but sometimes this might not match the name you want to use.
  47
  48 In these situations, simply set ~nameless-current-name~ as file-local variable.
  49 To do that, invoke the following command:
  50 #+BEGIN_SRC text
  51 M-x add-file-local-variable RET nameless-current-name RET "package-name"
  52 #+END_SRC
  53 You can also set the same name for all lisp files in a project by
  54 setting dir-local variables with ~M-x add-file-local-variable~.
  55
  56 ** Requiring other packages as aliases
  57 Nameless can also be used to “import” other packages as aliases. For
  58 instance, in the default behaviour, functions in the ~font-lock~
  59 package (e.g., ~font-lock-add-keywords~) will be displayed with the
  60 ~fl:~ prefix (e.g., ~fl:add-keywords~).
  61
  62 You can configure your own aliases globally with ~nameless-global-aliases~.
  63 #+BEGIN_SRC emacs-lisp
  64 (setq nameless-global-aliases '(("fl" . "font-lock")
  65                                 ("s" . "seq")
  66                                 ("me" . "macroexp")
  67                                 ("c" . "cider")
  68                                 ("q" . "queue")))
  69 #+END_SRC
  70
  71 You can also configure aliases per-file by setting ~nameless-aliases~
  72 as a file-local variable.
  73 #+BEGIN_SRC emacs-lisp
  74 ;; Local Variables:
  75 ;; nameless-aliases: (("c" . "cider"))
  76 ;; End:
  77 #+END_SRC
  78 Note that there’s no ~quote~ before ~((c~!\\
  79 You can also configure it for a whole project, by setting it as a dir-local variable.
  80
  81 ** Private symbols
  82
  83 Private symbols in elisp are written with an extra dash after the
  84 prefix (e.g., ~foobar--indent-impl~). With Nameless, these are usually
  85 displayed as ~:-indent-impl~, but you can also make them be displayed
  86 as ~::indent-impl~ by setting
  87
  88 #+BEGIN_SRC emacs-lisp
  89 (setq nameless-private-prefix t)
  90 #+END_SRC
  91
  92 ** Indentation and paragraph filling
  93 Hiding parts of symbols could affect the way Emacs indents your code
  94 and fills your paragraphs. Nameless lets you decide whether you want
  95 that to happen or not.
  96
  97 The default behavior is that code is indented according to what you
  98 see (i.e., according to short symbols), but text inside strings is
  99 *not*. So text inside strings will be filled in the same way as if you
 100 didn’t have ~nameless-mode~. Here’s how a docstring might be filled
 101 with ~nameless-mode~ enabled:
 102 #+BEGIN_SRC text
 103 If point is immediately after an alias configured in the name you
 104 had in `:aliases' or `:global-aliases', replace
 105 it with the full name for that alias.
 106 #+END_SRC
 107 Altough it may look strange that the second line is so short, that’s
 108 the correct way. When view on a ~*Help*~ buffer, that docstring will
 109 look like this:
 110 #+BEGIN_SRC text
 111 If point is immediately after an alias configured in the name you
 112 had in `nameless-aliases' or `nameless-global-aliases', replace
 113 it with the full name for that alias.
 114 #+END_SRC
 115
 116 To change this behavior, configure the variable
 117 ~nameless-affect-indentation-and-filling~.