diff options
Diffstat (limited to 'module/output')
-rw-r--r-- | module/output/color.scm | 22 | ||||
-rw-r--r-- | module/output/vdir.scm | 55 |
2 files changed, 22 insertions, 55 deletions
diff --git a/module/output/color.scm b/module/output/color.scm new file mode 100644 index 00000000..123d0ba2 --- /dev/null +++ b/module/output/color.scm @@ -0,0 +1,22 @@ +(define-module (output color) + ) + +;; Returns a color with good contrast to the given background color. +;; https://stackoverflow.com/questions/1855884/determine-font-color-based-on-background-color/1855903#1855903 +(define-public (calculate-fg-color c) + (catch #t + (lambda () + (define (str->num c n) (string->number (substring/shared c n (+ n 2)) 16)) + ;; (format (current-error-port) "COLOR = ~s~%" c) + (let ((r (str->num c 1)) + (g (str->num c 3)) + (b (str->num c 5))) + (if (< 1/2 (/ (+ (* 0.299 r) + (* 0.587 g) + (* 0.114 b)) + #xFF)) + "#000000" "#FFFFFF"))) + (lambda args + (format (current-error-port) "Error calculating foreground color?~%~s~%" args) + "#FF0000" + ))) diff --git a/module/output/vdir.scm b/module/output/vdir.scm deleted file mode 100644 index 2541f0f9..00000000 --- a/module/output/vdir.scm +++ /dev/null @@ -1,55 +0,0 @@ -;;; Commentary: -;;; Module for writing components to the vdir storage format. -;;; Currently also has some cases for "big" icalendar files, -;;; but those are currently unsupported. - -;;; TODO generalize save-event and remove-event into a general interface, -;;; which different database backends can implement. Actually, do that for all -;;; loading and writing. - -;;; Code: - -(define-module (output vdir) - :use-module (util) - :use-module (vcomponent ical output) - :use-module (vcomponent) - :use-module ((util io) :select (with-atomic-output-to-file)) - ) - - -(define / file-name-separator-string) - -(define-public (save-event event) - (define calendar (parent event)) - (case (prop calendar '-X-HNH-SOURCETYPE) - [(file) - (error "Importing into direct calendar files not supported")] - - [(vdir) - (let* ((uid (or (prop event 'UID) (uuidgen)))) - (set! (prop event 'UID) uid - ;; TODO use existing filename if present? - (prop event '-X-HNH-FILENAME) (string-append - (prop calendar '-X-HNH-DIRECTORY) - / uid ".ics")) - (with-atomic-output-to-file (prop event '-X-HNH-FILENAME) - (lambda () (print-components-with-fake-parent (list event)))) - uid)] - - [else - (error "Source of calendar unknown, aborting.") - ])) - - -(define-public (remove-event event) - (define calendar (parent event)) - (case (prop calendar '-X-HNH-SOURCETYPE) - [(file) - (error "Removing events from large files unsupported")] - - [(vdir) - (delete-file (prop event '-X-HNH-FILENAME))] - - [else - (error "Source of calendar unknown, aborting.") - ])) |