|
|
#lang debug racket/base
|
|
|
(require racket/runtime-path
|
|
|
racket/string
|
|
|
racket/path
|
|
|
racket/match)
|
|
|
(provide (all-defined-out))
|
|
|
|
|
|
(define-runtime-path quadwriter-fonts-dir "fonts")
|
|
|
(define-runtime-path default-font-face "fonts/source-serif/SourceSerifPro-Regular.otf")
|
|
|
(define default-font-family "source-serif")
|
|
|
(define default-font-size 12)
|
|
|
(define default-line-height 16)
|
|
|
|
|
|
(define font-paths (make-hash))
|
|
|
|
|
|
(define (setup-font-path-table! base-path)
|
|
|
;; populate `font-paths` table with font paths
|
|
|
;; search "fonts" subdirectory in project for other subdirectories
|
|
|
;; which are presumed to contain fonts.
|
|
|
;; and link them to their family names & styles.
|
|
|
;; this allows a flexible mapping from internal to external names, like @font-face
|
|
|
;; note that all the semantics are derived from the file system
|
|
|
;; not any metadata fields within the font.
|
|
|
;; this is faster and easier, because you can just muck with the directory and filenames
|
|
|
;; to change the font mapping.
|
|
|
;; though it also creates the potential for mischief,
|
|
|
;; if a font is named something that doesn't reflect its visual reality.
|
|
|
;; but we are not the font police.
|
|
|
(hash-clear! font-paths)
|
|
|
(define-values (dir path _) (split-path base-path))
|
|
|
(define doc-fonts-dir (build-path dir "fonts"))
|
|
|
;; run doc-fonts-dir first because earlier fonts take precedence
|
|
|
(for* ([fonts-dir (in-list (list quadwriter-fonts-dir doc-fonts-dir ))]
|
|
|
#:when (directory-exists? fonts-dir)
|
|
|
[font-family-subdir (in-directory fonts-dir)]
|
|
|
#:when (directory-exists? font-family-subdir)
|
|
|
[font-path (in-directory font-family-subdir)]
|
|
|
#:when (member (path-get-extension font-path) '(#".otf" #".ttf")))
|
|
|
(match-define (list font-path-string family-name)
|
|
|
(map (λ (x) (path->string (find-relative-path fonts-dir x))) (list font-path font-family-subdir)))
|
|
|
(define key
|
|
|
(cons family-name
|
|
|
(match (string-downcase font-path-string)
|
|
|
[(and (regexp "bold") (regexp "it(alic)?")) 'bi]
|
|
|
[(regexp "bold") 'b]
|
|
|
[(regexp "it(alic)?") 'i]
|
|
|
[_ 'r])))
|
|
|
;; only set value if there's not one there already.
|
|
|
;; this means that we only use the first eligible font we find.
|
|
|
(hash-ref! font-paths key font-path)))
|
|
|
|
|
|
(define (font-attrs->path font-family bold italic)
|
|
|
;; find the font-path corresponding to a certain family name and style.
|
|
|
(define key (cons font-family
|
|
|
(cond
|
|
|
[(and bold italic) 'bi]
|
|
|
[bold 'b]
|
|
|
[italic 'i]
|
|
|
[else 'r])))
|
|
|
(define regular-key (cons font-family 'r))
|
|
|
(cond
|
|
|
[(hash-ref font-paths key #false)]
|
|
|
;; if there isn't one, try the regular style.
|
|
|
[(hash-ref font-paths regular-key #false)]
|
|
|
;; If there isn't one, use the default.
|
|
|
[else default-font-face]))
|
|
|
|
|
|
(define (resolve-font-path attrs)
|
|
|
(define this-font-family (hash-ref! attrs 'font-family default-font-family))
|
|
|
(unless (complete-path? this-font-family)
|
|
|
(define this-bold (hash-ref! attrs 'font-bold #false))
|
|
|
(define this-italic (hash-ref! attrs 'font-italic #false))
|
|
|
(hash-set! attrs 'font-path (font-attrs->path this-font-family this-bold this-italic))))
|
|
|
|
|
|
(define (parse-percentage pstr)
|
|
|
(/ (string->number (string-trim pstr "%")) 100.0))
|
|
|
|
|
|
(define (resolve-font-size attrs)
|
|
|
(define this-font-size (hash-ref! attrs 'font-size default-font-size))
|
|
|
(define this-font-size-adjust (parse-percentage (hash-ref! attrs 'font-size-adjust "100%")))
|
|
|
;; we bake the adjustment into the font size...
|
|
|
(hash-set! attrs 'font-size (* this-font-size this-font-size-adjust))
|
|
|
;; and then set the adjustment back to 100% (since it's now accounted for)
|
|
|
(hash-set! attrs 'font-size-adjust "100%"))
|