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How to enable minor mode in major mode hook?
This makes it easy to enable the minor mode in a major mode hook, for example. If doc is nil, the macro supplies a default documentation string explaining the above. By default, it also defines a variable named mode, which is set to t or nil by enabling or disabling the mode.
Is there a macro to toggle the minor mode?
This macro defines a new minor mode whose name is mode (a symbol). It defines a command named mode to toggle the minor mode, with doc as its documentation string. The toggle command takes one optional (prefix) argument.
Are there any minor modes in music theory?
There are four minor modes (those with minor 3rds), and we have already seen one of them, Aeolian. Since we are familiar with Aeolian—we know the scale by its other name, natural minor —we will use it as a point of reference.
What makes a mode different from a major scale?
Each mode has characteristic notes—particular notes that clearly set each apart from the regular major, or Ionian, scale. For example, notice that the 4th degree of the Lydian scale is a half step higher than its counterpart in the Ionian or major scale, and the 7th degree of the Mixolydian scale is a half step lower.
How to enable or disable minor mode in Lisp?
A positive prefix argument enables the mode, any other prefix argument disables it. From Lisp, an argument of toggle toggles the mode, whereas an omitted or nil argument enables the mode. This makes it easy to enable the minor mode in a major mode hook, for example.
How to define a minor mode in GNU?
It defines a command named mode to toggle the minor mode, with doc as its documentation string. The toggle command takes one optional (prefix) argument. If called interactively with no argument it toggles the mode on or off. A positive prefix argument enables the mode, any other prefix argument disables it.
When to use minor mode in JavaScript?
The hook function add-hook will create this variable lazily when needed and the function run-hooks will ignore hook variables that don’t yet exist, so it doesn’t get tripped up by this situation. So despite its strange initial absence, the new minor mode will use this hook as soon as functions are added to it. This mode doesn’t do anything yet.
What does define minor mode do in Lisp?
The rest of define-minor-mode is a body for arbitrary Lisp, like a defun. It’s run every time the mode is toggled off or on, so it’s like a built-in hook function. Use it to do any sort of special setup or teardown, such hooking or unhooking Emacs’ hooks.
What to display in Mode line when mode is enabled?
The string lighter says what to display in the mode line when the mode is enabled; if it is nil, the mode is not displayed in the mode line. The optional argument keymap specifies the keymap for the minor mode.