[PATCH] emacs: Add `notmuch-show-line-faces' and apply it.

[Jani Nikula]

On Tue, 27 Dec 2011 17:13:23 +0000, David Edmondson <dme at dme.org> wrote:
> Similar to `notmuch-search-line-faces', `notmuch-show-line-faces'
> allows the header line in `notmuch-show-mode' buffers to be coloured
> according to the tags of the message.

Hi David, I've only given this a quick test drive, but so far it seems
to work as expected. I think this would be a useful feature to have.

The patch failed to apply cleanly without "emacs: Don't attempt to
colour tags in `notmuch-show-mode'." Is there a dependency, or was this
accidental?


BR,
Jani.


> ---
>  emacs/notmuch-lib.el  |   18 ++++++++++++++++++
>  emacs/notmuch-show.el |   32 ++++++++++++++++++++++++++++----
>  emacs/notmuch.el      |   17 ++---------------
>  3 files changed, 48 insertions(+), 19 deletions(-)
> 
> diff --git a/emacs/notmuch-lib.el b/emacs/notmuch-lib.el
> index 0f856bf..1f00fe0 100644
> --- a/emacs/notmuch-lib.el
> +++ b/emacs/notmuch-lib.el
> @@ -96,6 +96,24 @@ the user hasn't set this variable with the old or new value."
>    (interactive)
>    (kill-buffer (current-buffer)))
>  
> +(defun notmuch-color-line (start end line-tag-list spec)
> +  "Colorize a line based on tags."
> +  ;; Create the overlay only if the message has tags which match one
> +  ;; of those specified in `spec'.
> +  (let (overlay)
> +    (mapc (lambda (elem)
> +	    (let ((tag (car elem))
> +		  (attributes (cdr elem)))
> +	      (when (member tag line-tag-list)
> +		(when (not overlay)
> +		  (setq overlay (make-overlay start end))
> +		  (overlay-put overlay 'priority 5))
> +		;; Merge the specified properties with any already
> +		;; applied from an earlier match.
> +		(overlay-put overlay 'face
> +			     (append (overlay-get overlay 'face) attributes)))))
> +	  spec)))
> +
>  ;;
>  
>  (defun notmuch-common-do-stash (text)
> diff --git a/emacs/notmuch-show.el b/emacs/notmuch-show.el
> index 24f0b40..0885bd5 100644
> --- a/emacs/notmuch-show.el
> +++ b/emacs/notmuch-show.el
> @@ -88,6 +88,23 @@ any given message."
>  	     notmuch-wash-elide-blank-lines
>  	     notmuch-wash-excerpt-citations))
>  
> +(defcustom notmuch-show-line-faces nil
> +  "Tag to face mapping for header line highlighting in `notmuch-show-mode'.
> +
> +Here is an example of how to color search results based on tags.
> + (the following text would be placed in your ~/.emacs file):
> +
> + (setq notmuch-search-line-faces '((\"delete\" . (:foreground \"red\"
> +						  :background \"blue\"))
> +                                   (\"unread\" . (:foreground \"green\"))))
> +
> +The attributes defined for matching tags are merged, with later
> +attributes overriding earlier. A message having both \"delete\"
> +and \"unread\" tags with the above settings would have a green
> +foreground and blue background."
> +  :type '(alist :key-type (string) :value-type (custom-face-edit))
> +  :group 'notmuch)
> +
>  ;; Mostly useful for debugging.
>  (defcustom notmuch-show-all-multipart/alternative-parts t
>    "Should all parts of multipart/alternative parts be shown?"
> @@ -269,7 +286,8 @@ unchanged ADDRESS if parsing fails."
>  (defun notmuch-show-insert-headerline (headers date tags depth)
>    "Insert a notmuch style headerline based on HEADERS for a
>  message at DEPTH in the current thread."
> -  (let ((start (point)))
> +  (let ((start (point))
> +	overlay)
>      (insert (notmuch-show-spaces-n (* notmuch-indent-messages-width depth))
>  	    (notmuch-show-clean-address (plist-get headers :From))
>  	    " ("
> @@ -277,7 +295,9 @@ message at DEPTH in the current thread."
>  	    ") ("
>  	    (mapconcat 'identity tags " ")
>  	    ")\n")
> -    (overlay-put (make-overlay start (point)) 'face 'notmuch-message-summary-face)))
> +    (setq overlay (make-overlay start (point)))
> +    (overlay-put overlay 'face 'notmuch-message-summary-face)
> +    (overlay-put overlay 'priority 2)))
>  
>  (defun notmuch-show-insert-header (header header-value)
>    "Insert a single header."
> @@ -712,7 +732,8 @@ current buffer, if possible."
>  	 body-start body-end
>  	 (headers-invis-spec (notmuch-show-make-symbol "header"))
>  	 (message-invis-spec (notmuch-show-make-symbol "message"))
> -	 (bare-subject (notmuch-show-strip-re (plist-get headers :Subject))))
> +	 (bare-subject (notmuch-show-strip-re (plist-get headers :Subject)))
> +	 (tags (plist-get msg :tags)))
>  
>      ;; Set `buffer-invisibility-spec' to `nil' (a list), otherwise
>      ;; removing items from `buffer-invisibility-spec' (which is what
> @@ -737,10 +758,13 @@ current buffer, if possible."
>  					    (plist-get msg :date_relative)
>  					  nil)
>  					(plist-get headers :Date))
> -				    (plist-get msg :tags) depth)
> +				    tags depth)
>  
>      (setq content-start (point-marker))
>  
> +    ;; Colour the header line according to the tags of the message.
> +    (notmuch-color-line message-start content-start tags notmuch-show-line-faces)
> +
>      (plist-put msg :headers-invis-spec headers-invis-spec)
>      (plist-put msg :message-invis-spec message-invis-spec)
>  
> diff --git a/emacs/notmuch.el b/emacs/notmuch.el
> index 4844385..56d35d0 100644
> --- a/emacs/notmuch.el
> +++ b/emacs/notmuch.el
> @@ -641,7 +641,7 @@ This function advances the next thread when finished."
>  		  (forward-line (1- notmuch-search-target-line))))))))
>  
>  (defcustom notmuch-search-line-faces nil
> -  "Tag/face mapping for line highlighting in notmuch-search.
> +  "Tag to face mapping for line highlighting in `notmuch-search-mode'.
>  
>  Here is an example of how to color search results based on tags.
>   (the following text would be placed in your ~/.emacs file):
> @@ -659,20 +659,7 @@ foreground and blue background."
>  
>  (defun notmuch-search-color-line (start end line-tag-list)
>    "Colorize lines in `notmuch-show' based on tags."
> -  ;; Create the overlay only if the message has tags which match one
> -  ;; of those specified in `notmuch-search-line-faces'.
> -  (let (overlay)
> -    (mapc (lambda (elem)
> -	    (let ((tag (car elem))
> -		  (attributes (cdr elem)))
> -	      (when (member tag line-tag-list)
> -		(when (not overlay)
> -		  (setq overlay (make-overlay start end)))
> -		;; Merge the specified properties with any already
> -		;; applied from an earlier match.
> -		(overlay-put overlay 'face
> -			     (append (overlay-get overlay 'face) attributes)))))
> -	  notmuch-search-line-faces)))
> +  (notmuch-color-line start end line-tag-list notmuch-search-line-faces))
>  
>  (defun notmuch-search-author-propertize (authors)
>    "Split `authors' into matching and non-matching authors and
> -- 
> 1.7.7.3
> 
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