Suppose I want to code something like this
case mode in lisp-mode) do-something ;; shell-mode) do-other ;; latex-mode) do-different ;; esac
What would be the best way to do this in lisp? Especially, how to find out, which mode is in use?
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major-mode variable to find out major mode:
Symbol for current buffer’s major mode.
cond function to do something depending on mode:
Try each clause until one succeeds.
Each clause looks like (CONDITION BODY...). CONDITION is evaluated and, if the value is non-nil, this clause succeeds: then the expressions in BODY are evaluated and the last one’s value is the value of the cond-form. If a clause has one element, as in (CONDITION), then the cond-form returns CONDITION’s value, if that is non-nil. If no clause succeeds, cond returns nil.
(cond ((eq major-mode 'lisp-interaction-mode) (message "lisp interaction mode")) ((eq major-mode 'text-mode) (message "text mode")))
(derived-mode-p &rest MODES)
Non-nil if the current major mode is derived from one of MODES.