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941e172724
This allows (and requires) the original-tags to be passed along with
the current-tags to be passed to notmuch-tag-format-tags. This allows
the tag formatting to show added and deleted tags.By default a removed
tag is displayed with strike-through in red (if strike-through is not
available, eg on a terminal, inverse video is used instead) and an
added tag is displayed underlined in green.
If the caller does not wish to use the new feature it can pass
current-tags for both arguments and, at this point, we do exactly that
in the three callers of this function.
Note, we cannot tidily allow original-tags to be optional because we would
need to distinguish nil meaning "we are not specifying original-tags"
from nil meaning there were no original-tags (an empty list).
We use this in subsequent patches to make it clear when a message was
unread when you first loaded a show buffer (previously the unread tag
could be removed before a user realised that it had been unread).
The code adds into the existing tag formatting code. The user can
specify exactly how a tag should be displayed normally, when deleted,
or when added.
Since the formatting code matches regexps a user can match all deleted
tags with a ".*" in notmuch-tag-deleted-formats. For example setting
notmuch-tag-deleted-formats to '((".*" nil)) tells notmuch not to show
deleted tags at all.
All the variables are customizable; however, more complicated cases
like changing the face depending on the type of display will require
custom lisp.
Currently this overrides notmuch-tag-deleted-formats for the tests
setting it to '((".*" nil)) so that they get removed from the display
and, thus, all tests still pass.
422 lines
16 KiB
EmacsLisp
422 lines
16 KiB
EmacsLisp
;; notmuch-tag.el --- tag messages within emacs
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;;
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;; Copyright © Damien Cassou
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;; Copyright © Carl Worth
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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: Carl Worth <cworth@cworth.org>
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;; Damien Cassou <damien.cassou@gmail.com>
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;;
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;;; Code:
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;;
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(require 'cl)
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(require 'crm)
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(require 'notmuch-lib)
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(define-widget 'notmuch-tag-format-type 'lazy
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"Customize widget for notmuch-tag-format and friends"
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:type '(alist :key-type (regexp :tag "Tag")
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:extra-offset -3
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:value-type
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(radio :format "%v"
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(const :tag "Hidden" nil)
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(set :tag "Modified"
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(string :tag "Display as")
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(list :tag "Face" :extra-offset -4
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(const :format "" :inline t
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(notmuch-apply-face tag))
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(list :format "%v"
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(const :format "" quote)
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custom-face-edit))
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(list :format "%v" :extra-offset -4
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(const :format "" :inline t
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(notmuch-tag-format-image-data tag))
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(choice :tag "Image"
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(const :tag "Star"
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(notmuch-tag-star-icon))
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(const :tag "Empty star"
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(notmuch-tag-star-empty-icon))
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(const :tag "Tag"
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(notmuch-tag-tag-icon))
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(string :tag "Custom")))
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(sexp :tag "Custom")))))
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(defcustom notmuch-tag-formats
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'(("unread" (propertize tag 'face '(:foreground "red")))
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("flagged" (propertize tag 'face '(:foreground "blue"))
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(notmuch-tag-format-image-data tag (notmuch-tag-star-icon))))
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"Custom formats for individual tags.
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This is an association list that maps from tag name regexps to
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lists of formatting expressions. The first entry whose car
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regexp-matches a tag will be used to format that tag. The regexp
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is implicitly anchored, so to match a literal tag name, just use
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that tag name (if it contains special regexp characters like
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\".\" or \"*\", these have to be escaped). The cdr of the
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matching entry gives a list of Elisp expressions that modify the
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tag. If the list is empty, the tag will simply be hidden.
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Otherwise, each expression will be evaluated in order: for the
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first expression, the variable `tag' will be bound to the tag
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name; for each later expression, the variable `tag' will be bound
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to the result of the previous expression. In this way, each
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expression can build on the formatting performed by the previous
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expression. The result of the last expression will displayed in
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place of the tag.
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For example, to replace a tag with another string, simply use
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that string as a formatting expression. To change the foreground
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of a tag to red, use the expression
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(propertize tag 'face '(:foreground \"red\"))
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See also `notmuch-tag-format-image', which can help replace tags
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with images."
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:group 'notmuch-search
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:group 'notmuch-show
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:group 'notmuch-faces
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:type 'notmuch-tag-format-type)
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(defcustom notmuch-tag-deleted-formats
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'(("unread" (notmuch-apply-face bare-tag
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(if (display-supports-face-attributes-p '(:strike-through "red"))
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'(:strike-through "red")
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'(:inverse-video t))))
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(".*" (notmuch-apply-face tag
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(if (display-supports-face-attributes-p '(:strike-through "red"))
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'(:strike-through "red")
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'(:inverse-video t)))))
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"Custom formats for tags when deleted.
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For deleted tags the formats in `notmuch-tag-formats` are applied
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first and then these formats are applied on top; that is `tag'
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passed to the function is the tag with all these previous
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formattings applied. The formatted can access the original
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unformatted tag as `bare-tag'.
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By default this shows deleted tags with strike-through in red,
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unless strike-through is not available (e.g., emacs is running in
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a terminal) in which case it uses inverse video. To hide deleted
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tags completely set this to
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'((\".*\" nil))
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See `notmuch-tag-formats' for full documentation."
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:group 'notmuch-show
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:group 'notmuch-faces
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:type 'notmuch-tag-format-type)
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(defcustom notmuch-tag-added-formats
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'((".*" (notmuch-apply-face tag '(:underline "green"))))
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"Custom formats for tags when added.
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For added tags the formats in `notmuch-tag-formats` are applied
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first and then these formats are applied on top.
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To disable special formatting of added tags, set this variable to
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nil.
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See `notmuch-tag-formats' for full documentation."
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:group 'notmuch-show
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:group 'notmuch-faces
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:type 'notmuch-tag-format-type)
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(defun notmuch-tag-format-image-data (tag data)
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"Replace TAG with image DATA, if available.
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This function returns a propertized string that will display image
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DATA in place of TAG.This is designed for use in
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`notmuch-tag-formats'.
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DATA is the content of an SVG picture (e.g., as returned by
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`notmuch-tag-star-icon')."
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(propertize tag 'display
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`(image :type svg
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:data ,data
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:ascent center
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:mask heuristic)))
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(defun notmuch-tag-star-icon ()
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"Return SVG data representing a star icon.
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This can be used with `notmuch-tag-format-image-data'."
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"<?xml version=\"1.0\" encoding=\"UTF-8\" standalone=\"no\"?>
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<svg version=\"1.1\" width=\"16\" height=\"16\">
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<g transform=\"translate(-242.81601,-315.59635)\">
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<path
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d=\"m 290.25762,334.31206 -17.64143,-11.77975 -19.70508,7.85447 5.75171,-20.41814 -13.55925,-16.31348 21.19618,-0.83936 11.325,-17.93675 7.34825,19.89939 20.55849,5.22795 -16.65471,13.13786 z\"
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transform=\"matrix(0.2484147,-0.02623394,0.02623394,0.2484147,174.63605,255.37691)\"
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style=\"fill:#ffff00;fill-rule:evenodd;stroke:#000000;stroke-width:1px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1\" />
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</g>
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</svg>")
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(defun notmuch-tag-star-empty-icon ()
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"Return SVG data representing an empty star icon.
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This can be used with `notmuch-tag-format-image-data'."
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"<?xml version=\"1.0\" encoding=\"UTF-8\" standalone=\"no\"?>
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<svg version=\"1.1\" width=\"16\" height=\"16\">
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<g transform=\"translate(-242.81601,-315.59635)\">
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<path
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d=\"m 290.25762,334.31206 -17.64143,-11.77975 -19.70508,7.85447 5.75171,-20.41814 -13.55925,-16.31348 21.19618,-0.83936 11.325,-17.93675 7.34825,19.89939 20.55849,5.22795 -16.65471,13.13786 z\"
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transform=\"matrix(0.2484147,-0.02623394,0.02623394,0.2484147,174.63605,255.37691)\"
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style=\"fill:#d6d6d1;fill-opacity:1;fill-rule:evenodd;stroke:#000000;stroke-width:1px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1\" />
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</g>
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</svg>")
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(defun notmuch-tag-tag-icon ()
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"Return SVG data representing a tag icon.
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This can be used with `notmuch-tag-format-image-data'."
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"<?xml version=\"1.0\" encoding=\"UTF-8\" standalone=\"no\"?>
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<svg version=\"1.1\" width=\"16\" height=\"16\">
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<g transform=\"translate(0,-1036.3622)\">
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<path
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d=\"m 0.44642857,1040.9336 12.50000043,0 2.700893,3.6161 -2.700893,3.616 -12.50000043,0 z\"
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style=\"fill:#ffff00;fill-opacity:1;fill-rule:evenodd;stroke:#000000;stroke-width:0.25;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-opacity:1\" />
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</g>
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</svg>")
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(defvar notmuch-tag--format-cache (make-hash-table :test 'equal)
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"Cache of tag format lookup. Internal to `notmuch-tag-format-tag'.")
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(defun notmuch-tag-clear-cache ()
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"Clear the internal cache of tag formats."
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(clrhash notmuch-tag--format-cache))
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(defun notmuch-tag--get-formats (tag format-alist)
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"Find the first item whose car regexp-matches TAG."
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(save-match-data
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;; Don't use assoc-default since there's no way to distinguish a
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;; missing key from a present key with a null cdr.
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(assoc* tag format-alist
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:test (lambda (tag key)
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(and (eq (string-match key tag) 0)
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(= (match-end 0) (length tag)))))))
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(defun notmuch-tag--do-format (tag formatted-tag formats)
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"Apply a tag-formats entry to TAG."
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(cond ((null formats) ;; - Tag not in `formats',
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formatted-tag) ;; the format is the tag itself.
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((null (cdr formats)) ;; - Tag was deliberately hidden,
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nil) ;; no format must be returned
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(t
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;; Tag was found and has formats, we must apply all the
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;; formats. TAG may be null so treat that as a special case.
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(let ((bare-tag tag)
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(tag (copy-sequence (or formatted-tag ""))))
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(dolist (format (cdr formats))
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(setq tag (eval format)))
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(if (and (null formatted-tag) (equal tag ""))
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nil
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tag)))))
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(defun notmuch-tag-format-tag (tags orig-tags tag)
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"Format TAG according to `notmuch-tag-formats'.
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TAGS and ORIG-TAGS are lists of the current tags and the original
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tags; tags which have been deleted (i.e., are in ORIG-TAGS but
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are not in TAGS) are shown using formats from
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`notmuch-tag-deleted-formats'; tags which have been added (i.e.,
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are in TAGS but are not in ORIG-TAGS) are shown using formats
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from `notmuch-tag-added-formats' and tags which have not been
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changed (the normal case) are shown using formats from
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`notmuch-tag-formats'"
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(let* ((tag-state (cond ((not (member tag tags)) 'deleted)
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((not (member tag orig-tags)) 'added)))
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(formatted-tag (gethash (cons tag tag-state) notmuch-tag--format-cache 'missing)))
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(when (eq formatted-tag 'missing)
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(let ((base (notmuch-tag--get-formats tag notmuch-tag-formats))
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(over (case tag-state
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(deleted (notmuch-tag--get-formats
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tag notmuch-tag-deleted-formats))
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(added (notmuch-tag--get-formats
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tag notmuch-tag-added-formats))
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(otherwise nil))))
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(setq formatted-tag (notmuch-tag--do-format tag tag base))
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(setq formatted-tag (notmuch-tag--do-format tag formatted-tag over))
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(puthash (cons tag tag-state) formatted-tag notmuch-tag--format-cache)))
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formatted-tag))
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(defun notmuch-tag-format-tags (tags orig-tags &optional face)
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"Return a string representing formatted TAGS."
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(let ((face (or face 'notmuch-tag-face))
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(all-tags (sort (delete-dups (append tags orig-tags nil)) #'string<)))
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(notmuch-apply-face
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(mapconcat #'identity
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;; nil indicated that the tag was deliberately hidden
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(delq nil (mapcar
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(apply-partially #'notmuch-tag-format-tag tags orig-tags)
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all-tags))
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" ")
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face
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t)))
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(defcustom notmuch-before-tag-hook nil
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"Hooks that are run before tags of a message are modified.
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'tags' will contain the tags that are about to be added or removed as
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a list of strings of the form \"+TAG\" or \"-TAG\".
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'query' will be a string containing the search query that determines
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the messages that are about to be tagged"
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:type 'hook
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:options '(notmuch-hl-line-mode)
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:group 'notmuch-hooks)
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(defcustom notmuch-after-tag-hook nil
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"Hooks that are run after tags of a message are modified.
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'tags' will contain the tags that were added or removed as
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a list of strings of the form \"+TAG\" or \"-TAG\".
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'query' will be a string containing the search query that determines
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the messages that were tagged"
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:type 'hook
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:options '(notmuch-hl-line-mode)
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:group 'notmuch-hooks)
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(defvar notmuch-select-tag-history nil
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"Variable to store minibuffer history for
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`notmuch-select-tag-with-completion' function.")
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(defvar notmuch-read-tag-changes-history nil
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"Variable to store minibuffer history for
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`notmuch-read-tag-changes' function.")
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(defun notmuch-tag-completions (&rest search-terms)
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"Return a list of tags for messages matching SEARCH-TERMS.
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Returns all tags if no search terms are given."
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(if (null search-terms)
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(setq search-terms (list "*")))
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(split-string
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(with-output-to-string
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(with-current-buffer standard-output
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(apply 'call-process notmuch-command nil t
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nil "search" "--output=tags" "--exclude=false" search-terms)))
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"\n+" t))
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(defun notmuch-select-tag-with-completion (prompt &rest search-terms)
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(let ((tag-list (apply #'notmuch-tag-completions search-terms)))
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(completing-read prompt tag-list nil nil nil 'notmuch-select-tag-history)))
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(defun notmuch-read-tag-changes (current-tags &optional prompt initial-input)
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"Prompt for tag changes in the minibuffer.
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CURRENT-TAGS is a list of tags that are present on the message or
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messages to be changed. These are offered as tag removal
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completions. CURRENT-TAGS may contain duplicates. PROMPT, if
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non-nil, is the query string to present in the minibuffer. It
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defaults to \"Tags\". INITIAL-INPUT, if non-nil, will be the
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initial input in the minibuffer."
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(let* ((all-tag-list (notmuch-tag-completions))
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(add-tag-list (mapcar (apply-partially 'concat "+") all-tag-list))
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(remove-tag-list (mapcar (apply-partially 'concat "-") current-tags))
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(tag-list (append add-tag-list remove-tag-list))
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(prompt (concat (or prompt "Tags") " (+add -drop): "))
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(crm-separator " ")
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;; By default, space is bound to "complete word" function.
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;; Re-bind it to insert a space instead. Note that <tab>
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;; still does the completion.
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(crm-local-completion-map
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(let ((map (make-sparse-keymap)))
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(set-keymap-parent map crm-local-completion-map)
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(define-key map " " 'self-insert-command)
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map)))
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(delete "" (completing-read-multiple
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prompt
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;; Append the separator to each completion so when the
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;; user completes a tag they can immediately begin
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;; entering another. `completing-read-multiple'
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;; ultimately splits the input on crm-separator, so we
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;; don't need to strip this back off (we just need to
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;; delete "empty" entries caused by trailing spaces).
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(mapcar (lambda (tag-op) (concat tag-op crm-separator)) tag-list)
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nil nil initial-input
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'notmuch-read-tag-changes-history))))
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(defun notmuch-update-tags (tags tag-changes)
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"Return a copy of TAGS with additions and removals from TAG-CHANGES.
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TAG-CHANGES must be a list of tags names, each prefixed with
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either a \"+\" to indicate the tag should be added to TAGS if not
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present or a \"-\" to indicate that the tag should be removed
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from TAGS if present."
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(let ((result-tags (copy-sequence tags)))
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(dolist (tag-change tag-changes)
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(let ((op (string-to-char tag-change))
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(tag (unless (string= tag-change "") (substring tag-change 1))))
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(case op
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(?+ (unless (member tag result-tags)
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(push tag result-tags)))
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(?- (setq result-tags (delete tag result-tags)))
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(otherwise
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(error "Changed tag must be of the form `+this_tag' or `-that_tag'")))))
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(sort result-tags 'string<)))
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(defconst notmuch-tag-argument-limit 1000
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"Use batch tagging if the tagging query is longer than this.
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This limits the length of arguments passed to the notmuch CLI to
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avoid system argument length limits and performance problems.")
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(defun notmuch-tag (query tag-changes)
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"Add/remove tags in TAG-CHANGES to messages matching QUERY.
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QUERY should be a string containing the search-terms.
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TAG-CHANGES is a list of strings of the form \"+tag\" or
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\"-tag\" to add or remove tags, respectively.
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Note: Other code should always use this function alter tags of
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messages instead of running (notmuch-call-notmuch-process \"tag\" ..)
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directly, so that hooks specified in notmuch-before-tag-hook and
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notmuch-after-tag-hook will be run."
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;; Perform some validation
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(mapc (lambda (tag-change)
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(unless (string-match-p "^[-+]\\S-+$" tag-change)
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(error "Tag must be of the form `+this_tag' or `-that_tag'")))
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tag-changes)
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(unless (null tag-changes)
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(run-hooks 'notmuch-before-tag-hook)
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(if (<= (length query) notmuch-tag-argument-limit)
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(apply 'notmuch-call-notmuch-process "tag"
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(append tag-changes (list "--" query)))
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;; Use batch tag mode to avoid argument length limitations
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(let ((batch-op (concat (mapconcat #'notmuch-hex-encode tag-changes " ")
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" -- " query)))
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(notmuch-call-notmuch-process :stdin-string batch-op "tag" "--batch")))
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(run-hooks 'notmuch-after-tag-hook)))
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(defun notmuch-tag-change-list (tags &optional reverse)
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"Convert TAGS into a list of tag changes.
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Add a \"+\" prefix to any tag in TAGS list that doesn't already
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begin with a \"+\" or a \"-\". If REVERSE is non-nil, replace all
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\"+\" prefixes with \"-\" and vice versa in the result."
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(mapcar (lambda (str)
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(let ((s (if (string-match "^[+-]" str) str (concat "+" str))))
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(if reverse
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(concat (if (= (string-to-char s) ?-) "+" "-")
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(substring s 1))
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s)))
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tags))
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;;
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(provide 'notmuch-tag)
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;; Local Variables:
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;; byte-compile-warnings: (not cl-functions)
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;; End:
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