diff options
Diffstat (limited to 'lisp/emacs-lisp/chart.el')
| -rw-r--r-- | lisp/emacs-lisp/chart.el | 64 |
1 files changed, 36 insertions, 28 deletions
diff --git a/lisp/emacs-lisp/chart.el b/lisp/emacs-lisp/chart.el index 40c17b916f9..5afc6d3bde3 100644 --- a/lisp/emacs-lisp/chart.el +++ b/lisp/emacs-lisp/chart.el @@ -89,33 +89,39 @@ Useful if new Emacs is used on B&W display.") (declare-function x-display-color-cells "xfns.c" (&optional terminal)) -(defvar chart-face-list - (if (display-color-p) - (let ((cl chart-face-color-list) - (pl chart-face-pixmap-list) - (faces ()) - nf) - (while cl - (setq nf (make-face - (intern (concat "chart-" (car cl) "-" (car pl))))) - (set-face-background nf (if (condition-case nil - (> (x-display-color-cells) 4) - (error t)) - (car cl) - "white")) - (set-face-foreground nf "black") - (if (and chart-face-use-pixmaps pl) - (condition-case nil - (set-face-background-pixmap nf (car pl)) - (error (message "Cannot set background pixmap %s" (car pl))))) - (push nf faces) - (setq cl (cdr cl) - pl (cdr pl))) - faces)) +(defvar chart-face-list #'chart--face-list "Faces used to colorize charts. +This should either be a list of faces, or a function that returns +a list of faces. + List is limited currently, which is ok since you really can't display too much in text characters anyways.") +(defun chart--face-list () + (and + (display-color-p) + (let ((cl chart-face-color-list) + (pl chart-face-pixmap-list) + (faces ()) + nf) + (while cl + (setq nf (make-face + (intern (concat "chart-" (car cl) "-" (car pl))))) + (set-face-background nf (if (condition-case nil + (> (x-display-color-cells) 4) + (error t)) + (car cl) + "white")) + (set-face-foreground nf "black") + (if (and chart-face-use-pixmaps pl) + (condition-case nil + (set-face-background-pixmap nf (car pl)) + (error (message "Cannot set background pixmap %s" (car pl))))) + (push nf faces) + (setq cl (cdr cl) + pl (cdr pl))) + faces))) + (define-derived-mode chart-mode special-mode "Chart" "Define a mode in Emacs for displaying a chart." (buffer-disable-undo) @@ -374,7 +380,10 @@ of the drawing." (let* ((data (oref c sequences)) (dir (oref c direction)) (odir (if (eq dir 'vertical) 'horizontal 'vertical)) - ) + (faces + (if (functionp chart-face-list) + (funcall chart-face-list) + chart-face-list))) (while data (if (stringp (car (oref (car data) data))) ;; skip string lists... @@ -390,10 +399,9 @@ of the drawing." (zp (if (eq dir 'vertical) (chart-translate-ypos c 0) (chart-translate-xpos c 0))) - (fc (if chart-face-list - (nth (% i (length chart-face-list)) chart-face-list) - 'default)) - ) + (fc (if faces + (nth (% i (length faces)) faces) + 'default))) (if (< dp zp) (progn (chart-draw-line dir (car rng) dp zp) |