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(ns fira-code.calt
(:require
[clojure.string :as str]
[fira-code.coll :as coll]
[fira-code.glyphs :as glyphs]
[fira-code.time :as time]
[flatland.ordered.map :refer [ordered-map]]))
;; No ligature should follow those sequences
(def ignore-prefixes
[["parenleft" "question" "colon"]
;; #578 #624 Regexp lookahead/lookbehind
["parenleft" "question" "equal"]
["parenleft" "question" "less" "equal"]
["parenleft" "question" "exclam"]
["parenleft" "question" "less" "exclam"]
;; #850 PHP <?=
["less" "question" "equal"]
])
(defn gen-ignore-prefixes [liga]
(str/join
(for [prefix ignore-prefixes
;; try to match last N glyphs in `prefix` with N first in `liga`
N (range (count liga) 0 -1)
:when (= (take-last N prefix) (take N liga))]
(str " ignore sub"
" " (str/join " " (drop-last N prefix))
" " (first liga) "'"
" " (str/join " " (drop 1 liga))
";\n"))))
(def priorities
{;; <|>
["less" "bar" "greater"] 0
;; |||> ||> |> <| <|| <|||
["bar" "bar" "bar" "greater"] 1
["bar" "bar" "greater"] 1
["bar" "greater"] 1
["less" "bar" "bar" "bar"] 1
["less" "bar" "bar"] 1
["less" "bar"] 1
;; #346 We need << <<< >> >>> || ||| substituted before -- --- == ===
;; so that `ignore [less greater bar] hyphen hyphen` would not trigger
["less" "less"] 2
["less" "less" "less"] 2
["greater" "greater"] 2
["greater" "greater" "greater"] 2
["bar" "bar"] 2
["bar" "bar" "bar"] 2})
(def ignores
(coll/multimap-by str
["slash" "asterisk"]
(str
" ignore sub slash' asterisk slash;\n"
" ignore sub asterisk slash' asterisk;\n")
["asterisk" "slash"]
(str
" ignore sub slash asterisk' slash;\n"
" ignore sub asterisk' slash asterisk;\n")
["asterisk" "asterisk"]
(str
" ignore sub slash asterisk' asterisk;\n"
" ignore sub asterisk' asterisk slash;\n")
["asterisk" "asterisk" "asterisk"]
(str
" ignore sub slash asterisk' asterisk asterisk;\n"
" ignore sub asterisk' asterisk asterisk slash;\n")
;; #1061
["colon" "colon"]
(str " ignore sub colon' colon [less greater];\n"
" ignore sub [less greater] colon' colon;\n")
["colon" "colon" "colon"]
(str " ignore sub colon' colon colon [less greater];\n"
" ignore sub [less greater] colon' colon colon;\n")
;; #621 <||>
["less" "bar" "bar"]
" ignore sub less' bar bar greater;\n"
["bar" "bar" "greater"]
" ignore sub less bar' bar greater;\n"
;; #593 {|}
["braceleft" "bar"]
" ignore sub braceleft' bar braceright;\n"
["bar" "braceright"]
" ignore sub braceleft bar' braceright;\n"
;; #593 [|]
["bracketleft" "bar"]
" ignore sub bracketleft' bar bracketright;\n"
["bar" "bracketright"]
" ignore sub bracketleft bar' bracketright;\n"
;; #410 <*>> <+>> <$>>
["greater" "greater"]
" ignore sub [asterisk plus dollar] greater' greater;\n"
;; #410 <*>>> <+>>> <$>>>
["greater" "greater" "greater"]
" ignore sub [asterisk plus dollar] greater' greater greater;\n"
;; #410 <<*> <<+> <<$>
["less" "less"]
" ignore sub less' less [asterisk plus dollar];\n"
;; #410 <<<*> <<<+> <<<$>
["less" "less" "less"]
" ignore sub less' less less [asterisk plus dollar];\n"
;; #948 [==[ ]==]
;; #968 [== ==]
["equal" "equal"]
(str " ignore sub bracketleft equal' equal;\n"
" ignore sub equal' equal bracketright;\n")
;; #948 [===[ ]===]
;; #968 [=== ===]
["equal" "equal" "equal"]
(str " ignore sub bracketleft equal' equal equal;\n"
" ignore sub equal' equal equal bracketright;\n")
;; #346 =:=
["colon" "equal"]
" ignore sub equal colon' equal;\n"
;; #346 =!=
["exclam" "equal"]
" ignore sub equal exclam' equal;\n"
;; #346 =!==
["exclam" "equal" "equal"]
" ignore sub equal exclam' equal equal;\n"
;; #346 =<= <=< <=> <=| <=: <=! <=/
["less" "equal"]
(str " ignore sub equal less' equal;\n"
" ignore sub less' equal [less greater bar colon exclam slash];\n")
;; #548 >=<
;; #346 =>= >=> >=< >=| >=: >=! >=/
["greater" "equal"]
(str " ignore sub equal greater' equal;\n"
" ignore sub greater' equal [less greater bar colon exclam slash];\n")
;; #346 >>->> >>=>>
;; #974 keep >>=
["greater" "greater"]
(str " ignore sub [hyphen equal] greater' greater;\n"
" ignore sub greater' greater hyphen;\n"
" ignore sub greater' greater equal [equal less greater bar colon exclam slash];\n")
;; #346 <<-<< <<=<<
;; #974 keep <<=
["less" "less"]
(str " ignore sub [hyphen equal] less' less;\n"
" ignore sub less' less hyphen;\n"
" ignore sub less' less equal [equal less greater bar colon exclam slash];\n")
;; #346 ||-|| ||=||
;; #974 keep ||=
["bar" "bar"]
(str " ignore sub [hyphen equal] bar' bar;\n"
" ignore sub bar' bar hyphen;\n"
" ignore sub bar' bar equal [equal less greater bar colon exclam slash];\n")
;; #816 //=
["slash" "slash"]
(str " ignore sub equal slash' slash;\n"
" ignore sub slash' slash equal;\n")
;; #346 <--> >--< |--|
["hyphen" "hyphen"]
(str " ignore sub [less greater bar] hyphen' hyphen;\n"
" ignore sub hyphen' hyphen [less greater bar];\n")
;; #346 <==> >==< |==| /==/ =:== =!== ==:= ==!=
["equal" "equal"]
(str " ignore sub equal [colon exclam] equal' equal;\n"
" ignore sub [less greater bar slash] equal' equal;\n"
" ignore sub equal' equal [less greater bar slash] ;\n"
" ignore sub equal' equal [colon exclam] equal;\n")
;; #346 <===> >===< |===| /===/ =:=== =!=== ===:= ===!=
["equal" "equal" "equal"]
(str " ignore sub equal [colon exclam] equal' equal equal;\n"
" ignore sub [less greater bar slash] equal' equal equal;\n"
" ignore sub equal' equal equal [less greater bar slash];\n"
" ignore sub equal' equal equal [colon exclam] equal;\n")
))
;; DO NOT generate ignores at all
(def skip-ignores? #{
;; #410 <<*>> <<+>> <<$>>
["less" "asterisk" "greater"]
["less" "plus" "greater"]
["less" "dollar" "greater"]
})
;; DO NOT generate ligature
(def manual? #{
;; /\ \/
["slash" "backslash"]
["backslash" "slash"]
})
(defn liga->rule
"[f f i] => { [LIG LIG i] f_f_i.liga
[LIG f i] LIG
[ f f i] LIG }"
[liga]
(case (count liga)
2 (let [[a b] liga]
(str/replace
(str
"lookup 1_2 {\n"
(when-not (skip-ignores? liga)
(str " ignore sub 1 1' 2;\n"
" ignore sub 1' 2 2;\n"))
(gen-ignore-prefixes liga)
(get ignores liga)
" sub 1.spacer 2' by 1_2.liga;\n"
" sub 1' 2 by 1.spacer;\n"
; "sub 1 2 by 1_2.liga;"
"} 1_2;")
#"\d" {"1" a "2" b}))
3 (let [[a b c] liga]
(str/replace
(str
"lookup 1_2_3 {\n"
(when-not (skip-ignores? liga)
(str " ignore sub 1 1' 2 3;\n"
" ignore sub 1' 2 3 3;\n"))
(gen-ignore-prefixes liga)
(get ignores liga)
" sub 1.spacer 2.spacer 3' by 1_2_3.liga;\n"
" sub 1.spacer 2' 3 by 2.spacer;\n"
" sub 1' 2 3 by 1.spacer;\n"
; "sub 1 2 3 by 1_2_3.liga;"
"} 1_2_3;")
#"\d" {"1" a "2" b "3" c}))
4 (let [[a b c d] liga]
(str/replace
(str
"lookup 1_2_3_4 {\n"
(when-not (skip-ignores? liga)
(str " ignore sub 1 1' 2 3 4;\n"
" ignore sub 1' 2 3 4 4;\n"))
(gen-ignore-prefixes liga)
(get ignores liga)
" sub 1.spacer 2.spacer 3.spacer 4' by 1_2_3_4.liga;\n"
" sub 1.spacer 2.spacer 3' 4 by 3.spacer;\n"
" sub 1.spacer 2' 3 4 by 2.spacer;\n"
" sub 1' 2 3 4 by 1.spacer;\n"
; "sub 1 2 3 4 by 1_2_3_4.liga;"
"} 1_2_3_4;")
#"\d" {"1" a "2" b "3" c "4" d}))
5 (let [[a b c d e] liga]
(str/replace
(str
"lookup 1_2_3_4_5 {\n"
(when-not (skip-ignores? liga)
(str " ignore sub 1 1' 2 3 4 5;\n"
" ignore sub 1' 2 3 4 4 5;\n"))
(gen-ignore-prefixes liga)
(get ignores liga)
" sub 1.spacer 2.spacer 3.spacer 4.spacer 5' by 1_2_3_4_5.liga;\n"
" sub 1.spacer 2.spacer 3.spacer 4' 5 by 4.spacer;\n"
" sub 1.spacer 2.spacer 3' 4 5 by 3.spacer;\n"
" sub 1.spacer 2' 3 4 5 by 2.spacer;\n"
" sub 1' 2 3 4 5 by 1.spacer;\n"
; "sub 1 2 3 4 5 by 1_2_3_4_5.liga;"
"} 1_2_3_4_5;")
#"\d" {"1" a "2" b "3" c "4" d "5" e}))
))
(defn compare-ligas [l1 l2]
(let [p1 (priorities l1 Long/MAX_VALUE)
p2 (priorities l2 Long/MAX_VALUE)
pc (compare p1 p2)
c1 (count l1)
c2 (count l2)
cc (compare c1 c2)]
(cond
(not= 0 pc) pc ;; lower priority first
(not= 0 cc) (- cc) ;; longer first
:else (compare l1 l2)))) ;; alphabetical
(defn replace-calt [font ligas]
(let [ligas' (->> ligas
(remove manual?)
(sort compare-ligas))
calt (->> ligas'
(map liga->rule)
(str/join "\n\n"))
glyphs (map #(str (str/join "_" %) ".liga") ligas')
counts (coll/group-by-to count count ligas')]
(when-some [unused (not-empty (reduce dissoc ignores ligas'))]
(println " WARN Unused ignores" (str/join " " (keys unused))))
(when-some [unused (not-empty (reduce disj skip-ignores? ligas'))]
(println " WARN Unused skip-ignores?" (str/join " " unused)))
(when-some [unused (not-empty (reduce disj manual? ligas))]
(println " WARN Unused manual?" (str/join " " unused)))
(println " generated calt:"
; (str/join " " glyphs)
(str
#_"(" (get counts 2) " pairs, "
(get counts 3) " triples, "
(get counts 4) " quadruples, "
(count ligas') " total" #_")"))
(glyphs/update-code font :features "calt" (constantly calt))))
|
