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enscript.clj
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enscript.clj
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; Copyright 2024 Vivid Inc. and/or its affiliates.
;
; Licensed under the Apache License, Version 2.0 (the "License")
; you may not use this file except in compliance with the License.
; You may obtain a copy of the License at
;
; https://www.apache.org/licenses/LICENSE-2.0
;
; Unless required by applicable law or agreed to in writing, software
; distributed under the License is distributed on an "AS IS" BASIS,
; WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
; See the License for the specific language governing permissions and
; limitations under the License.
(ns ^:internal-api vivid.art.enscript
(:require
[clojure.string]))
(defn prelude [ns-sym]
[(str "(ns " ns-sym ")")
; Provide (render) to the template evaluation environment
"(require '[vivid.art :refer [render]])"
; Generally sorted alphabetically
"(def ^java.lang.StringBuilder __vivid__art__sb (new java.lang.StringBuilder))"
"(defmacro block [& body] `(let [sb# (new java.lang.StringBuilder)] (binding [emit #(.append sb# %)] ~@body (.toString sb#))))"
(str "(defn ^:dynamic emit ([]) ([& more] (doseq [m more] (.append " ns-sym "/__vivid__art__sb m)) nil))")
"(defn yield [k] (let [rc vivid.art/*render-context*] (get-in rc [:bindings k] \"\")))"])
(defn coda [ns-sym]
[(str "(.toString " ns-sym "/__vivid__art__sb)")])
(defn def-bindings
[bindings]
(vec (for [[k v] bindings]
(let [quote-value? (get (meta v) :quote-value?)]
(format "(def %s %s%s)"
; Non-symbols may lead to an invalid (def)
(pr-str (symbol k))
(if quote-value? "'" "")
(pr-str v))))))
(defn enscript
[forms bindings]
(let [ns-sym (get @(ns-resolve (find-ns 'vivid.art) '*render-context*) :ns)]
(as-> [(prelude ns-sym)
(def-bindings bindings)
forms
(coda ns-sym)] s
(remove empty? s)
(interleave s (repeat ""))
(flatten s)
(clojure.string/join "\n" s))))