--- /dev/null
+;; notmuch-jump.el --- User-friendly shortcut keys
+;;
+;; Copyright © Austin Clements
+;;
+;; This file is part of Notmuch.
+;;
+;; Notmuch is free software: you can redistribute it and/or modify it
+;; under the terms of the GNU General Public License as published by
+;; the Free Software Foundation, either version 3 of the License, or
+;; (at your option) any later version.
+;;
+;; Notmuch is distributed in the hope that it will be useful, but
+;; WITHOUT ANY WARRANTY; without even the implied warranty of
+;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+;; General Public License for more details.
+;;
+;; You should have received a copy of the GNU General Public License
+;; along with Notmuch. If not, see <http://www.gnu.org/licenses/>.
+;;
+;; Authors: Austin Clements <aclements@csail.mit.edu>
+;; David Edmondson <dme@dme.org>
+
+(eval-when-compile (require 'cl))
+
+(require 'notmuch-lib)
+(require 'notmuch-hello)
+
+;;;###autoload
+(defun notmuch-jump-search ()
+ "Jump to a saved search by shortcut key.
+
+This prompts for and performs a saved search using the shortcut
+keys configured in the :key property of `notmuch-saved-searches'.
+Typically these shortcuts are a single key long, so this is a
+fast way to jump to a saved search from anywhere in Notmuch."
+ (interactive)
+
+ ;; Build the action map
+ (let (action-map)
+ (dolist (saved-search notmuch-saved-searches)
+ (let* ((saved-search (notmuch-hello-saved-search-to-plist saved-search))
+ (key (plist-get saved-search :key)))
+ (when key
+ (let ((name (plist-get saved-search :name))
+ (query (plist-get saved-search :query))
+ (oldest-first
+ (case (plist-get saved-search :sort-order)
+ (newest-first nil)
+ (oldest-first t)
+ (otherwise (default-value notmuch-search-oldest-first)))))
+ (push (list key name
+ `(lambda () (notmuch-search ',query ',oldest-first)))
+ action-map)))))
+ (setq action-map (nreverse action-map))
+
+ (if action-map
+ (notmuch-jump action-map "Search: ")
+ (error "To use notmuch-jump, please customize shortcut keys in notmuch-saved-searches."))))
+
+(defvar notmuch-jump--action nil)
+
+(defun notmuch-jump (action-map prompt)
+ "Interactively prompt for one of the keys in ACTION-MAP.
+
+Displays a summary of all bindings in ACTION-MAP in the
+minibuffer, reads a key from the minibuffer, and performs the
+corresponding action. The prompt can be canceled with C-g or
+RET. PROMPT must be a string to use for the prompt. PROMPT
+should include a space at the end.
+
+ACTION-MAP must be a list of triples of the form
+ (KEY LABEL ACTION)
+where KEY is a key binding, LABEL is a string label to display in
+the buffer, and ACTION is a nullary function to call. LABEL may
+be null, in which case the action will still be bound, but will
+not appear in the pop-up buffer.
+"
+
+ (let* ((items (notmuch-jump--format-actions action-map))
+ ;; Format the table of bindings and the full prompt
+ (table
+ (with-temp-buffer
+ (notmuch-jump--insert-items (window-body-width) items)
+ (buffer-string)))
+ (full-prompt
+ (concat table "\n\n"
+ (propertize prompt 'face 'minibuffer-prompt)))
+ ;; By default, the minibuffer applies the minibuffer face to
+ ;; the entire prompt. However, we want to clearly
+ ;; distinguish bindings (which we put in the prompt face
+ ;; ourselves) from their labels, so disable the minibuffer's
+ ;; own re-face-ing.
+ (minibuffer-prompt-properties
+ (notmuch-plist-delete
+ (copy-sequence minibuffer-prompt-properties)
+ 'face))
+ ;; Build the keymap with our bindings
+ (minibuffer-map (notmuch-jump--make-keymap action-map))
+ ;; The bindings save the the action in notmuch-jump--action
+ (notmuch-jump--action nil))
+ ;; Read the action
+ (read-from-minibuffer full-prompt nil minibuffer-map)
+
+ ;; If we got an action, do it
+ (when notmuch-jump--action
+ (funcall notmuch-jump--action))))
+
+(defun notmuch-jump--format-actions (action-map)
+ "Format the actions in ACTION-MAP.
+
+Returns a list of strings, one for each item with a label in
+ACTION-MAP. These strings can be inserted into a tabular
+buffer."
+
+ ;; Compute the maximum key description width
+ (let ((key-width 1))
+ (dolist (entry action-map)
+ (setq key-width
+ (max key-width
+ (string-width (format-kbd-macro (first entry))))))
+ ;; Format each action
+ (mapcar (lambda (entry)
+ (let ((key (format-kbd-macro (first entry)))
+ (desc (second entry)))
+ (concat
+ (propertize key 'face 'minibuffer-prompt)
+ (make-string (- key-width (length key)) ? )
+ " " desc)))
+ action-map)))
+
+(defun notmuch-jump--insert-items (width items)
+ "Make a table of ITEMS up to WIDTH wide in the current buffer."
+ (let* ((nitems (length items))
+ (col-width (+ 3 (apply #'max (mapcar #'string-width items))))
+ (ncols (if (> (* col-width nitems) width)
+ (max 1 (/ width col-width))
+ ;; Items fit on one line. Space them out
+ (setq col-width (/ width nitems))
+ (length items))))
+ (while items
+ (dotimes (col ncols)
+ (when items
+ (let ((item (pop items)))
+ (insert item)
+ (when (and items (< col (- ncols 1)))
+ (insert (make-string (- col-width (string-width item)) ? ))))))
+ (when items
+ (insert "\n")))))
+
+(defvar notmuch-jump-minibuffer-map
+ (let ((map (make-sparse-keymap)))
+ (set-keymap-parent map minibuffer-local-map)
+ ;; Make this like a special-mode keymap, with no self-insert-command
+ (suppress-keymap map)
+ map)
+ "Base keymap for notmuch-jump's minibuffer keymap.")
+
+(defun notmuch-jump--make-keymap (action-map)
+ "Translate ACTION-MAP into a minibuffer keymap."
+ (let ((map (make-sparse-keymap)))
+ (set-keymap-parent map notmuch-jump-minibuffer-map)
+ (dolist (action action-map)
+ (define-key map (first action)
+ `(lambda () (interactive)
+ (setq notmuch-jump--action ',(third action))
+ (exit-minibuffer))))
+ map))
+
+(unless (fboundp 'window-body-width)
+ ;; Compatibility for Emacs pre-24
+ (defun window-body-width (&optional window)
+ (let ((edges (window-inside-edges window)))
+ (- (caddr edges) (car edges)))))
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