video-10-emacs-5-modes.org

Research Tools Video 10 - emacs part 5 - modes

Introduction

• http://jeremy.zawodny.com/emacs/emacs-3.html
• Things like ERC for IRC chat are major modes. Only one major mode can be active at a time.
• Minor modes modify major modes.

Major modes

http://www.gnu.org/s/libtool/manual/emacs/Major-Modes.html#Major-Modes

• Fundamental
• Text Mode -> M-x text-mode
• org-mode -> M-x org-mode
• C/C++/Python
• HTML/XML
• etc

Minor mode

http://www.gnu.org/s/libtool/manual/emacs/Minor-Modes.html

• Flyspell
• auto-fill-mode
  • C-x f set fill column
  • M-o M-s - center
  • M-x fill-region
  • M-q <– fill paragraph
• yasnippets - add the ability to paste in repeating chunks of code
• overwrite mode

Help

• C-h m - display mode summary

Specifying modes

Extension

mode definition

Like this: -*- mode: Lisp; -*- on the 1st or 2nd line

By the magic definition on the first line

#!/usr/bin/env python