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116 lines
5.7 KiB
116 lines
5.7 KiB
;;; fancy-banner.el -*- lexical-binding: t; -*-
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;;; Commentary:
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;;
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;; See https://github.com/tecosaur/emacs-config/blob/master/config.org
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;;
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;;; Code:
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;;;
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(setq +doom-dashboard--width 120)
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(defvar fancy-splash-image-template
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(expand-file-name "misc/splash-images/blackhole-lines-template.svg" doom-private-dir)
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"Default template svg used for the splash image, with substitutions from ")
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(defvar fancy-splash-image-nil
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(expand-file-name "misc/splash-images/transparent-pixel.png" doom-private-dir)
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"An image to use at minimum size, usually a transparent pixel")
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(defvar fancy-splash-sizes
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`((:height 400 :min-height 50 :padding (0 . 2))
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(:height 350 :min-height 42 :padding (1 . 4))
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(:height 300 :min-height 35 :padding (1 . 3))
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(:height 250 :min-height 30 :padding (1 . 2))
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(:height 0 :min-height 0 :padding (0 . 0) :file ,fancy-splash-image-nil))
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"list of plists with the following properties
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:height the height of the image
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:min-height minimum `frame-height' for image
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:padding `+doom-dashboard-banner-padding' to apply
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:template non-default template file
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:file file to use instead of template")
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(setq fancy-splash-sizes
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`((:height 400 :min-height 40 :padding (0 . 4) :template ,(expand-file-name "misc/splash-images/blackhole-lines-0.svg" doom-private-dir))
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(:height 350 :min-height 32 :padding (1 . 4) :template ,(expand-file-name "misc/splash-images/blackhole-lines-0.svg" doom-private-dir))
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(:height 300 :min-height 28 :padding (1 . 4) :template ,(expand-file-name "misc/splash-images/blackhole-lines-1.svg" doom-private-dir))
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(:height 250 :min-height 26 :padding (1 . 3) :template ,(expand-file-name "misc/splash-images/blackhole-lines-2.svg" doom-private-dir))
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(:height 200 :min-height 24 :padding (1 . 3) :template ,(expand-file-name "misc/splash-images/blackhole-lines-3.svg" doom-private-dir))
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(:height 150 :min-height 22 :padding (1 . 2) :template ,(expand-file-name "misc/splash-images/blackhole-lines-4.svg" doom-private-dir))
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(:height 100 :min-height 20 :padding (1 . 2) :template ,(expand-file-name "misc/splash-images/blackhole-lines-5.svg" doom-private-dir))
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(:height 100 :min-height 14 :padding (1 . 2) :template ,(expand-file-name "misc/splash-images/emacs-e-template.svg" doom-private-dir))
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(:height 0 :min-height 0 :padding (0 . 0) :file ,fancy-splash-image-nil)))
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(defvar fancy-splash-template-colours
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'(("$colour1" . keywords) ("$colour2" . type) ("$colour3" . base5) ("$colour4" . base8))
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"list of colour-replacement alists of the form (\"$placeholder\" . 'theme-colour) which applied the template")
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(unless (file-exists-p (expand-file-name "theme-splashes" doom-cache-dir))
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(make-directory (expand-file-name "theme-splashes" doom-cache-dir) t))
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(defun fancy-splash-filename (theme-name height)
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(expand-file-name (concat (file-name-as-directory "theme-splashes")
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theme-name
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"-" (number-to-string height) ".svg")
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doom-cache-dir))
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(defun fancy-splash-clear-cache ()
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"Delete all cached fancy splash images"
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(interactive)
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(delete-directory (expand-file-name "theme-splashes" doom-cache-dir) t)
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(message "Cache cleared!"))
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(defun fancy-splash-generate-image (template height)
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"Read TEMPLATE and create an image if HEIGHT with colour substitutions as
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described by `fancy-splash-template-colours' for the current theme"
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(with-temp-buffer
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(insert-file-contents template)
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(re-search-forward "$height" nil t)
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(replace-match (number-to-string height) nil nil)
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(dolist (substitution fancy-splash-template-colours)
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(goto-char (point-min))
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(while (re-search-forward (car substitution) nil t)
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(replace-match (doom-color (cdr substitution)) nil nil)))
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(write-region nil nil
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(fancy-splash-filename (symbol-name doom-theme) height) nil nil)))
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(defun fancy-splash-generate-images ()
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"Perform `fancy-splash-generate-image' in bulk"
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(dolist (size fancy-splash-sizes)
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(unless (plist-get size :file)
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(fancy-splash-generate-image (or (plist-get size :file)
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(plist-get size :template)
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fancy-splash-image-template)
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(plist-get size :height)))))
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(defun ensure-theme-splash-images-exist (&optional height)
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(unless (file-exists-p (fancy-splash-filename
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(symbol-name doom-theme)
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(or height
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(plist-get (car fancy-splash-sizes) :height))))
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(fancy-splash-generate-images)))
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(defun get-appropriate-splash ()
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(let ((height (frame-height)))
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(cl-some (lambda (size) (when (>= height (plist-get size :min-height)) size))
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fancy-splash-sizes)))
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(setq fancy-splash-last-size nil)
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(setq fancy-splash-last-theme nil)
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(defun set-appropriate-splash (&rest _)
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(let ((appropriate-image (get-appropriate-splash)))
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(unless (and (equal appropriate-image fancy-splash-last-size)
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(equal doom-theme fancy-splash-last-theme)))
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(unless (plist-get appropriate-image :file)
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(ensure-theme-splash-images-exist (plist-get appropriate-image :height)))
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(setq fancy-splash-image
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(or (plist-get appropriate-image :file)
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(fancy-splash-filename (symbol-name doom-theme) (plist-get appropriate-image :height))))
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(setq +doom-dashboard-banner-padding (plist-get appropriate-image :padding))
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(setq fancy-splash-last-size appropriate-image)
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(setq fancy-splash-last-theme doom-theme)
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(+doom-dashboard-reload)))
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(add-hook 'window-size-change-functions #'set-appropriate-splash)
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(add-hook 'doom-load-theme-hook #'set-appropriate-splash)
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(provide 'fancy-banner)
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;; fancy-banner.el ends here
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