mirror of https://github.com/djcb/mu.git
mu4e-modeline: only cache global items, improve layout
So buffer-local items get flushed out automatically when we leave the buffers where the local items were specified. Honor mu4e-modeline-max-width
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@ -42,12 +42,6 @@
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:type 'boolean
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:group 'mu4e)
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(defcustom mu4e-modeline-max-width 42
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"Determines the maximum length of the modeline string.
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If the string exceeds this limit, it will be truncated to fit."
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:type 'integer
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:group 'mu4e)
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(defcustom mu4e-completing-read-function 'ido-completing-read
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"Function to be used to receive user-input during completion.
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Suggested possible values are:
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@ -100,18 +94,7 @@ marked as read-only, or non-nil otherwise."
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;;; Modeline
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(defun mu4e-quote-for-modeline (str)
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"Quote STR to be used literally in the modeline.
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The string will be shortened to fit if its length exceeds
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`mu4e-modeline-max-width'."
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(replace-regexp-in-string
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"%" "%%"
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(truncate-string-to-width str mu4e-modeline-max-width 0 nil t)))
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;;; Messages, warnings and errors
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(defun mu4e-format (frm &rest args)
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"Create [mu4e]-prefixed string based on format FRM and ARGS."
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@ -29,6 +29,17 @@
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(require 'cl-lib)
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(defcustom mu4e-modeline-max-width 42
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"Determines the maximum length of the local modeline string.
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If the string exceeds this limit, it will be truncated to fit.
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Note: this only affects the local modeline items (such as the context,
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the search properties and the last query), not the global items
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(such as the favorite bookmark results)."
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:type 'integer
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:group 'mu4e-modeline)
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(defvar-local mu4e--modeline-buffer-items nil
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"List of buffer-local items for the mu4e modeline.
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Each element is function that evaluates to a string.")
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@ -45,23 +56,42 @@ the buffer-local one."
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(if global
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'mu4e--modeline-global-items
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'mu4e--modeline-buffer-items)
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func))
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func 'append))
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(defun mu4e--modeline-quote-and-truncate (str)
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"Quote STR to be used literally in the modeline.
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The string is truncaed to fit if its length exceeds
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`mu4e-modeline-max-width'."
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(replace-regexp-in-string
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"%" "%%"
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(truncate-string-to-width str mu4e-modeline-max-width 0 nil t)))
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(defvar mu4e--modeline-item nil
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"Mu4e item for the global-mode-line.")
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(defvar mu4e--modeline-string-cached nil
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"Cached version of the modeline string.")
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(defvar mu4e--modeline-global-string-cached nil
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"Cached version of the _global_ modeline string.
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Note that we don't cache the local parts, so that the modeline
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gets updated when we leave the buffer from which the local parts
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originate.")
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(defun mu4e--modeline-string ()
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"Get the current mu4e modeline string."
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(or mu4e--modeline-string-cached
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(setq mu4e--modeline-string-cached
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(let* ((collect
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(lambda (lst)
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(mapconcat
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(lambda (func) (or (funcall func) ""))
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(append mu4e--modeline-buffer-items
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mu4e--modeline-global-items)
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" "))))
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(lambda (func) (or (funcall func) "")) lst " ")))
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(global-string ;; global string is _cached_ as it may be expensive.
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(or mu4e--modeline-global-string-cached
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(setq mu4e--modeline-global-string-cached
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(funcall collect mu4e--modeline-global-items)))))
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(concat
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;; (local) buffer items are _not_ cached, so they'll get update
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;; automatically when leaving the buffer.
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(mu4e--modeline-quote-and-truncate
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(funcall collect mu4e--modeline-buffer-items))
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" "
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global-string)))
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(define-minor-mode mu4e-modeline-mode
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"Minor mode for showing mu4e information on the modeline."
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@ -85,7 +115,7 @@ the buffer-local one."
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(defun mu4e--modeline-update ()
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"Recalculate and force-update the modeline."
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(when mu4e-modeline-mode
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(setq mu4e--modeline-string-cached nil)
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(setq mu4e--modeline-global-string-cached nil)
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(force-mode-line-update)))
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(provide 'mu4e-modeline)
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