mirror of
https://git.notmuchmail.org/git/notmuch
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f2f6da9af0
This command was previously written under the fragile assumption that the search bar was always the third widget. That's no longer true with the saved searches now appearing before the search bar, so we save the position of the search bar and go directly to it now.
376 lines
13 KiB
EmacsLisp
376 lines
13 KiB
EmacsLisp
;; notmuch-hello.el --- welcome to notmuch, a frontend
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;;
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;; Copyright © David Edmondson
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;;
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;; This file is part of Notmuch.
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;;
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;; Notmuch is free software: you can redistribute it and/or modify it
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;; under the terms of the GNU General Public License as published by
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;; the Free Software Foundation, either version 3 of the License, or
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;; (at your option) any later version.
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;;
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;; Notmuch is distributed in the hope that it will be useful, but
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;; WITHOUT ANY WARRANTY; without even the implied warranty of
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;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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;; General Public License for more details.
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;;
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;; You should have received a copy of the GNU General Public License
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;; along with Notmuch. If not, see <http://www.gnu.org/licenses/>.
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;;
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;; Authors: David Edmondson <dme@dme.org>
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(require 'widget)
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(require 'wid-edit) ; For `widget-forward'.
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(require 'cl)
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(require 'notmuch-lib)
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(require 'notmuch-mua)
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(declare-function notmuch-search "notmuch" (query &optional oldest-first target-thread target-line continuation))
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(declare-function notmuch-folder-count "notmuch" (search))
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(defvar notmuch-hello-search-bar-marker nil
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"The position of the search bar within the notmuch-hello buffer.")
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(defcustom notmuch-hello-recent-searches-max 10
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"The number of recent searches to store and display."
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:type 'integer
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:group 'notmuch)
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(defcustom notmuch-hello-show-empty-saved-searches nil
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"Should saved searches with no messages be listed?"
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:type 'boolean
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:group 'notmuch)
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(defcustom notmuch-hello-indent 4
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"How much to indent non-headers."
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:type 'integer
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:group 'notmuch)
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(defcustom notmuch-hello-saved-searches notmuch-folders
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"A list of saved searches to display."
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:type '(alist :key-type string :value-type string)
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:group 'notmuch)
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(defcustom notmuch-hello-show-logo t
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"Should the notmuch logo be shown?"
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:type 'boolean
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:group 'notmuch)
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(defface notmuch-hello-logo-background
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'((((class color)
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(background dark))
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(:background "#5f5f5f"))
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(((class color)
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(background light))
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(:background "white")))
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"Background colour for the notmuch logo."
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:group 'notmuch)
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(defvar notmuch-hello-url "http://notmuchmail.org"
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"The `notmuch' web site.")
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(defvar notmuch-hello-recent-searches nil)
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(defun notmuch-hello-remember-search (search)
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(if (not (member search notmuch-hello-recent-searches))
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(push search notmuch-hello-recent-searches))
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(if (> (length notmuch-hello-recent-searches)
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notmuch-hello-recent-searches-max)
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(setq notmuch-hello-recent-searches (butlast notmuch-hello-recent-searches))))
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(defun notmuch-hello-trim (search)
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"Trim whitespace."
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(if (string-match "^[[:space:]]*\\(.*[^[:space:]]\\)[[:space:]]*$" search)
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(match-string 1 search)
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search))
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(defun notmuch-hello-search (search)
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(let ((search (notmuch-hello-trim search)))
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(notmuch-hello-remember-search search)
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(notmuch-search search notmuch-search-oldest-first nil nil #'notmuch-hello-search-continuation)))
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(defun notmuch-hello-add-saved-search (widget)
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(interactive)
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(let ((search (widget-value
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(symbol-value
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(widget-get widget :notmuch-saved-search-widget))))
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(name (completing-read "Name for saved search: "
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notmuch-hello-saved-searches)))
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;; If an existing saved search with this name exists, remove it.
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(setq notmuch-hello-saved-searches
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(loop for elem in notmuch-hello-saved-searches
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if (not (equal name
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(car elem)))
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collect elem))
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;; Add the new one.
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(customize-save-variable 'notmuch-hello-saved-searches
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(push (cons name search)
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notmuch-hello-saved-searches))
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(message "Saved '%s' as '%s'." search name)
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(notmuch-hello-update)))
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(defun notmuch-hello-longest-label (tag-alist)
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(or (loop for elem in tag-alist
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maximize (length (car elem)))
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0))
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(defun notmuch-hello-roundup (dividend divisor)
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"Return the rounded up value of dividing `dividend' by `divisor'."
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(+ (/ dividend divisor)
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(if (> (% dividend divisor) 0) 1 0)))
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(defun notmuch-hello-reflect (list width)
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"Reflect a `width' wide matrix represented by `list' along the
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diagonal."
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;; Not very lispy...
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(let* ((len (length list))
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(nrows (notmuch-hello-roundup len width)))
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(loop for row from 0 to (- nrows 1)
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append (loop for col from 0 to (- width 1)
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;; How could we calculate the offset just once
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;; per inner-loop?
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if (< (+ (* nrows col) row) len)
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collect (nth (+ (* nrows col) row) list)
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else
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;; Don't forget to insert an empty slot in the
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;; output matrix if there is no corresponding
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;; value in the input matrix.
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collect nil))))
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(defun notmuch-hello-widget-search (widget &rest ignore)
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(notmuch-search (widget-get widget
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:notmuch-search-terms)
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notmuch-search-oldest-first
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nil nil #'notmuch-hello-search-continuation))
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(defun notmuch-hello-insert-tags (tag-alist widest target)
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(let* ((tags-per-line (max 1
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(/ (- (window-width) notmuch-hello-indent)
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;; Count is 7 wide, 1 for the space
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;; after the name.
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(+ 7 1 widest))))
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(count 0)
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(reordered-list (notmuch-hello-reflect tag-alist tags-per-line))
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;; Hack the display of the buttons used.
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(widget-push-button-prefix "")
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(widget-push-button-suffix "")
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(found-target-pos nil))
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;; dme: It feels as though there should be a better way to
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;; implement this loop than using an incrementing counter.
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(loop for elem in reordered-list
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do (progn
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;; (not elem) indicates an empty slot in the matrix.
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(when elem
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(widget-insert (format "%6s " (notmuch-folder-count (cdr elem))))
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(if (string= (car elem) target)
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(progn
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(setq found-target-pos (point-marker))))
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(widget-create 'push-button
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:notify #'notmuch-hello-widget-search
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:notmuch-search-terms (cdr elem)
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(car elem))
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(insert (make-string (- widest (length (car elem))) ? )))
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(setq count (1+ count))
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(if (eq (% count tags-per-line) 0)
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(widget-insert "\n"))))
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;; If the last line was not full (and hence did not include a
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;; carriage return), insert one now.
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(if (not (eq (% count tags-per-line) 0))
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(widget-insert "\n"))
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found-target-pos))
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(defun notmuch-hello-goto-search ()
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"Put point inside the `search' widget."
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(interactive)
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(goto-char notmuch-hello-search-bar-marker))
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(defimage notmuch-hello-logo ((:type png :file "notmuch-logo.png")))
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(defun notmuch-hello-search-continuation()
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(notmuch-hello-update t))
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(defun notmuch-hello-update (&optional no-display)
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;; Lazy - rebuild everything.
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(interactive)
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(let ((target (if (widget-at)
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(widget-value (widget-at))
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(progn
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(widget-forward 1)
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(widget-value (widget-at))))))
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(notmuch-hello no-display target)))
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(defun notmuch-hello (&optional no-display target)
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(interactive)
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(if no-display
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(set-buffer "*notmuch-hello*")
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(switch-to-buffer "*notmuch-hello*"))
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(kill-all-local-variables)
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(let ((inhibit-read-only t))
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(erase-buffer))
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(let ((all (overlay-lists)))
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;; Delete all the overlays.
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(mapc 'delete-overlay (car all))
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(mapc 'delete-overlay (cdr all)))
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(when notmuch-hello-show-logo
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(let ((image notmuch-hello-logo))
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;; The notmuch logo uses transparency. That can display poorly
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;; when inserting the image into an emacs buffer (black logo on
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;; a black background), so force the background colour of the
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;; image. We use a face to represent the colour so that
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;; `defface' can be used to declare the different possible
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;; colours, which depend on whether the frame has a light or
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;; dark background.
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(setq image (cons 'image
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(append (cdr image)
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(list :background (face-background 'notmuch-hello-logo-background)))))
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(insert-image image))
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(widget-insert " "))
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(widget-insert "Welcome to ")
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;; Hack the display of the links used.
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(let ((widget-link-prefix "")
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(widget-link-suffix ""))
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(widget-create 'link
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:notify (lambda (&rest ignore)
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(browse-url notmuch-hello-url))
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:help-echo "Visit the notmuch website."
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"notmuch")
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(widget-insert ". ")
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(widget-insert "You have ")
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(widget-create 'link
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:notify (lambda (&rest ignore)
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(notmuch-hello-update))
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:help-echo "Refresh"
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(car (process-lines notmuch-command "count")))
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(widget-insert " messages (that's not much mail).\n\n"))
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(let ((found-target-pos nil)
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(final-target-pos nil))
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(let* ((saved-alist
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;; Filter out empty saved seaches if required.
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(if notmuch-hello-show-empty-saved-searches
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notmuch-hello-saved-searches
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(loop for elem in notmuch-hello-saved-searches
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if (> (string-to-number (notmuch-folder-count (cdr elem))) 0)
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collect elem)))
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(saved-widest (notmuch-hello-longest-label saved-alist))
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(alltags-alist (mapcar '(lambda (tag) (cons tag (concat "tag:" tag)))
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(process-lines notmuch-command "search-tags")))
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(alltags-widest (notmuch-hello-longest-label alltags-alist))
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(widest (max saved-widest alltags-widest)))
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(when saved-alist
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(widget-insert "Saved searches: ")
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(widget-create 'push-button
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:notify (lambda (&rest ignore)
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(customize-variable 'notmuch-hello-saved-searches))
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"edit")
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(widget-insert "\n\n")
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(let ((start (point)))
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(setq found-target-pos (notmuch-hello-insert-tags saved-alist widest target))
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(if (not final-target-pos)
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(setq final-target-pos found-target-pos))
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(indent-rigidly start (point) notmuch-hello-indent)))
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(let ((start (point)))
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(widget-insert "\nSearch: ")
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(setq notmuch-hello-search-bar-marker (point-marker))
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(widget-create 'editable-field
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;; Leave some space at the start and end of the
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;; search boxes.
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:size (max 8 (- (window-width) (* 2 notmuch-hello-indent)
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(length "Search: ")))
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:action (lambda (widget &rest ignore)
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(notmuch-hello-search (widget-value widget))))
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(widget-insert "\n")
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(indent-rigidly start (point) notmuch-hello-indent))
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(when notmuch-hello-recent-searches
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(widget-insert "\nRecent searches: ")
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(widget-create 'push-button
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:notify (lambda (&rest ignore)
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(setq notmuch-hello-recent-searches nil)
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(notmuch-hello-update))
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"clear")
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(widget-insert "\n\n")
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(let ((start (point))
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(nth 0))
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(mapc '(lambda (search)
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(let ((widget-symbol (intern (format "notmuch-hello-search-%d" nth))))
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(set widget-symbol
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(widget-create 'editable-field
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;; Don't let the search boxes be
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;; less than 8 characters wide.
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:size (max 8
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(- (window-width)
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;; Leave some space
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;; at the start and
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;; end of the
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;; boxes.
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(* 2 notmuch-hello-indent)
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;; 1 for the space
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;; before the
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;; `[save]' button. 6
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;; for the `[save]'
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;; button.
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1 6))
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:action (lambda (widget &rest ignore)
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(notmuch-hello-search (widget-value widget)))
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search))
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(widget-insert " ")
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(widget-create 'push-button
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:notify (lambda (widget &rest ignore)
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(notmuch-hello-add-saved-search widget))
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:notmuch-saved-search-widget widget-symbol
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"save"))
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(widget-insert "\n")
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(setq nth (1+ nth)))
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notmuch-hello-recent-searches)
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(indent-rigidly start (point) notmuch-hello-indent)))
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(when alltags-alist
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(widget-insert "\nAll tags:\n\n")
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(let ((start (point)))
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(setq found-target-pos (notmuch-hello-insert-tags alltags-alist widest target))
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(if (not final-target-pos)
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(setq final-target-pos found-target-pos))
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(indent-rigidly start (point) notmuch-hello-indent))))
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(let ((start (point)))
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(widget-insert "\n\n")
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(widget-insert "Type a search query and hit RET to view matching threads.\n")
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(when notmuch-hello-recent-searches
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(widget-insert "Hit RET to re-submit a previous search. Edit it first if you like.\n")
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(widget-insert "Save recent searches with the `save' button.\n"))
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(when notmuch-hello-saved-searches
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(widget-insert "Edit saved searches with the `edit' button.\n"))
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(widget-insert "Hit RET or click on a saved search or tag name to view matching threads.\n")
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(widget-insert "`=' refreshes this screen. `s' jumps to the search box. `q' to quit.\n")
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(let ((fill-column (- (window-width) notmuch-hello-indent)))
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(center-region start (point))))
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(use-local-map widget-keymap)
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(local-set-key "=" 'notmuch-hello-update)
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(local-set-key "m" 'notmuch-mua-mail)
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(local-set-key "q" '(lambda () (interactive) (kill-buffer (current-buffer))))
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(local-set-key "s" 'notmuch-hello-goto-search)
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(local-set-key "v" '(lambda () (interactive)
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(message "notmuch version %s" (notmuch-version))))
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(widget-setup)
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(if final-target-pos
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(goto-char final-target-pos)
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(progn
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(goto-char (point-min))
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(widget-forward 1)))))
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;;
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(provide 'notmuch-hello)
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