Emacs
From Wsms
Note: This page should be titled emacs (all lowercase). It is Emacs due to technical limitations of Mediawiki.
emacs is a text editor.
Contents |
common usage
Start emacs in a console, instead of a new X window:
[ggeller@ws05 ~]$ emacs -nw
Tips
To run within a console window, rather than opening a new X window use the -nw option:
[ggeller@arthur Desktop]$ emacs -nw notes
Advanced command:
Esc-M query-replace-regex
The regex's in emacs are sort of like the ones in perl.
So, ^./ would match ./ at the beginning of a line, like you usually get with a find command.
major modes
To use a particular major mode, just type its name, like CPerl, in the emacs command area.
To specify a major mode, make the first line of your file something like this:
-*- mode: outline -*-
.emacs
Specify your own options in the file ~/.emacs. This is George's .emacs file as of November 2007:
;; .emacs
;;; uncomment this line to disable loading of "default.el" at startup
;; (setq inhibit-default-init t)
;; turn on font-lock mode
(when (fboundp 'global-font-lock-mode)
(global-font-lock-mode t))
;; enable visual feedback on selections
;(setq transient-mark-mode t)
;; default to better frame titles
(setq frame-title-format
(concat "%b - emacs@" (system-name)))
;; default to unified diffs
(setq diff-switches "-u")
;; always end a file with a newline
;(setq require-final-newline 'query)
;; GGG
(setq-default scroll-step 1)
(setq auto-mode-alist (cons '("\\.pl\\'" . cperl-mode) auto-mode-alist))
(setq auto-mode-alist (cons '("\\.pm\\'" . cperl-mode) auto-mode-alist))
;; GGG 20070526 from http://perso.tls.cena.fr/boubaker/distrib/mode-compile.el
(setq load-path (append load-path (list "~ggeller/.emacs.d/lisp")))
(autoload 'mode-compile "mode-compile" "Command to compile current buffer file based on the major mode" t)
(global-set-key "\C-cc" 'mode-compile)
(autoload 'mode-compile-kill "mode-compile" "Command to kill a compilation launched by `mode-compile'" t)
(global-set-key "\C-ck" 'mode-compile-kill)
;; GGG 20070611 from http://en.wikipedia.org/wiki/Wikipedia:Wikipedia-mode.el
(autoload 'wikipedia-mode "wikipedia-mode.el" "Major mode for editing documents in Wikipedia markup." t)
(add-to-list 'auto-mode-alist '("\\.wiki\\'" . wikipedia-mode))
(add-to-list 'auto-mode-alist '("en\\.wikipedia\\.org" . wikipedia-mode))
(add-to-list 'auto-mode-alist '("mozex.\\.*" . wikipedia-mode))
(autoload 'longlines-mode "longlines.el" "Minor mode for editing long lines." t)
;; GGG 20070618 Kill the startup message.
(setq inhibit-startup-message t)
;; GGG 20071024
(autoload 'html-helper-mode "html-helper-mode" "Yay HTML" t)
(setq auto-mode-alist (cons '("\\.html$" . html-helper-mode) auto-mode-alist))
(setq html-helper-do-write-file-hooks t)
(setq html-helper-do-write-file-hooks t)
(setq html-helper-build-new-buffer t)
(setq html-helper-address-string
"<a href=\"http://sdlinuxguy.com\">George Geller <george_geller@speakeasy.\
net></a>")
;; GGG 20071111
(autoload 'python-mode "python-mode" "Python Mode." t)
(add-to-list 'auto-mode-alist '("\\.py\\'" . python-mode))
(add-to-list 'interpreter-mode-alist '("python" . python-mode))
;; Org-mode settings 20071210
(add-to-list 'auto-mode-alist '("\\.org$" . org-mode))
(global-set-key "\C-cl" 'org-store-link)
(global-set-key "\C-ca" 'org-agenda)
(global-font-lock-mode 1)
;; 20071215
(add-to-list 'auto-mode-alist '("\\.php$" . php-mode))
Set the font size
M-x set-face-font RET default RET tab
Then you get a list of possible completions.
Use Ctrl-x, Ctrl-o to navigate to the pane with the choices.
Position the cursor on your new choice and hit enter:
See http://xemacs.org/Documentation/21.5/html/xemacs-faq_5.html#SEC159 for how to set the font at startup.
ispell and recursive edit
You can spell check your document with M-x ispell. During the ispell you can escape to do editing with C-r. Use ESC C-c C-c to return to your ispell session.
using run in the CPerl mode
When use use the CPerl mode, you get a menu that looks like this.
Note that the Run item under Perl is greyed out:
If you look at http://www.emacswiki.org/cgi-bin/wiki/CPerlMode it says:
To be able to use the grayed out commands (run etc…) you must install ModeCompile.
I went to http://www.emacswiki.org/cgi-bin/wiki/ModeCompile, where it says to get mode-compile.el from http://www.tls.cena.fr/~boubaker/Emacs/. I downloaded http://perso.tls.cena.fr/~boubaker/distrib/mode-compile.el and put it in ~/.emacs.d/lisp Then I added the following to .emacs:
(setq load-path (append load-path (list "~ggeller/.emacs.d/lisp"))) (autoload 'mode-compile "mode-compile" "Command to compile current buffer file \based on the major mode" t) (global-set-key "\C-cc" 'mode-compile) (autoload 'mode-compile-kill "mode-compile" "Command to kill a compilation laun\ched by `mode-compile'" t) (global-set-key "\C-ck" 'mode-compile-kill)
The next step was to visit mode-compile.el in emacs and byte compile it with ESC x bite-compile-file RETURN.
Then I quit emacs, a relaunched it with a perl script.
On executing C-c c I got to see:
save a shell session
Use Alt-x shell to start the shell session. When you want to save it use C-x C-w and specify a filename. See: http://www.debian.org/doc/manuals/reference/ch-tips.en.html
disable welcome screen
Starting with emacs-22 the default behavior is to show a welcome message when starting emacs:
The welcome screen is OK for beginners.
When you get tired of it, disable it with this in your .emacs file:
(setq inhibit-startup-message t)
modes
wikipedia mode
See http://en.wikipedia.org/wiki/Wikipedia:Wikipedia-mode.el The setup is pretty complicated. You download the mozex firefox addon from http://mozex.mozdev.org/ The lines I added to ~/.emacs were:
;; GGG 20070611 from http://en.wikipedia.org/wiki/Wikipedia:Wikipedia-mode.el
(autoload 'wikipedia-mode "wikipedia-mode.el" "Major mode for editing documents in Wikipedia markup." t)
(add-to-list 'auto-mode-alist '("\\.wiki\\'" . wikipedia-mode))
(add-to-list 'auto-mode-alist '("en\\.wikipedia\\.org" . wikipedia-mode))
(add-to-list 'auto-mode-alist '("mozex.\\.*" . wikipedia-mode))
(autoload 'longlines-mode "longlines.el" "Minor mode for editing long lines." t)
I also saved wikipedia-mode.el and longlines.el to ~/.emacs.d/lisp, installed the development version of mozex from mozex.mozdev.org, and configured it from Tools->Add-ons like this:
After all this, here is the payoff.
Edit a wiki page in Firefox.
Type Ctrl-9 in the text area, and Emacs magically pops open:
Unfortunately mozex does work correctly if you are connected using nx. emacs opens, but it doesn't find your tmp file. Instead you get an error of: "Wrong type argument: stringp, nil".
html-helper-mode mode
See http://www.santafe.edu/~nelson/tools/
Download http://www.santafe.edu/~nelson/tools/html-helper-mode.el
ggeller@harrison:~/Desktop/tmp$ mv html-helper-mode.el /home/ggeller/.emacs.d/lisp/
Add to ~/.emacs
(autoload 'html-helper-mode "html-helper-mode" "Yay HTML" t)
(setq auto-mode-alist (cons '("\\.html$" . html-helper-mode) auto-mode-alist))
python mode
Get the emacs python download from http://sourceforge.net/projects/python-mode/ Put the python-mode.el in ~/.emacs.d/lisp/ and make the changes shown above to .emacs.
org-mode
The December 2007 issue of Linux Journal has a good article about it. It is not obvious how to make tables work as advertised. One trick is to use := in the cell's formula.
Here is an example of a table with a valid formula:
| Column 1 | Column 2 | Column 3 | Numbers | |------------+------------+------------+---------| | Cell one | Cell two | Cell three | 121 | | Cell four | Cell five | Cell six | 200 | | Cell seven | Cell eight | Cell nine | 3002 | |------------+------------+------------+---------| | | | | 3323 | #+TBLFM: @5$4=vsum(@2..@4)
To get that, you have to type :=vsum(@2..@4) into the cell getting the sum.
There is a nice article on how to use emacs org mode for David Allen's Getting Things Done method: members.optusnet.com.au/~charles57/GTD/orgmode.html
see also
The #xemacs and #emacs channels on IRC at Freenode.net
Writing "Learning PHP 5" by David Sklar http://www.onlamp.com/lpt/a/5400
PHP Code Generation with Elisp by Zachary Kessin http://www.onlamp.com/pub/a/php/2005/11/23/php_elisp.html
Emacs/Howto_edit_po_files
Emacs/Outline_mode
zile a light-weight editor with emacs key bindings
e3em a light-weight editor with emacs key bindings included in puppy linux.
http://www.linuxjournal.com/article/6242 - Getting Started with Emacs by Charles Curley
http://edward.oconnor.cx/elisp/ from "Ted" at barcampsd 2007
gconf-editor Set the gtk_key_theme to Emacs so that applications like Firefox use emacs key bindings
