From: Ralph Ronnquist <ralph.ronnquist@gmail.com>
Date: Mon, 8 May 2023 01:05:14 +0000 (+1000)
Subject: initial
X-Git-Url: https://git.rrq.au/?a=commitdiff_plain;h=HEAD;p=rrq%2Fnewlisp%2Fhumancss.git

initial
---

208e98c90b0007a00a028b7e8f1fb71b89eafce5
diff --git a/.gitweb b/.gitweb
new file mode 100644
index 0000000..232c527
--- /dev/null
+++ b/.gitweb
@@ -0,0 +1,2 @@
+description = Stream filter that reads css and writes it out stylished.
+category = newlisp
diff --git a/humancss.lsp b/humancss.lsp
new file mode 100755
index 0000000..f013481
--- /dev/null
+++ b/humancss.lsp
@@ -0,0 +1,86 @@
+#!/usr/local/bin/newlisp
+#
+# Stream filter that reads css and writes it out stylished. run with
+#
+# newlisp humancss.lsp < bad.css > good.css
+#
+# Not actually pretty-printing, but merely adding indentation and newlines.
+
+;(signal 2 (fn (x) (exit 0)))
+
+(setf IN '())
+
+;; Load the CSS file as an array of single-character strings
+(while (setf LINE (read-line)) (extend IN (explode LINE) '("\n")))
+(setf IN (array (length IN) IN)) ; This should speed of indexed access
+(setf LAST (- (length IN) 1))
+
+;; Coalsce comments and strings into units
+(define (coalesce START END) ; exclusive
+  (when (< END (length IN))
+    (setf (IN START) (join (array-list (START (- END START) IN))))
+    (while (< (inc START) END) (setf (IN START) ""))))
+
+(define (coalesce-block-comment i)
+  (let ((STAR nil) (END nil))
+    (for (j (+ 2 i) LAST 1 END)
+      (if STAR (if (= "/" (IN j)) (setf END j) (setf STAR nil))
+        (= "*" (IN j)) (setf STAR true)))
+    (when END (coalesce i (+ 1 END)))))
+
+(define (coalesce-line-comment i)
+  (let ((END (find "\n" IN nil i)))
+    (when END (coalesce i (+ 1 END)))))
+    
+(define (index-of-any OPTS START)
+  (if (> START LAST) nil
+    (if (find OPTS (START IN) (fn (X Y) (member Y X))) (+ START $it))))
+
+(define (coalesce-string i) ; (IN i) is the string character
+  (let ((END nil))
+    (for (j (+ 1 i) LAST 1 END)
+      (if (= "\\" (IN j)) (coalesce j (+ 2 j))
+        (= (IN i) (IN j)) (setf END (+ 1 j))))
+    (when END (coalesce i END))))
+
+; Coalesce comments, meta-quotes and strings
+(let ((SLASH nil))
+  (for (i 0 LAST)
+    (if (= "\\" (IN i)) (begin (coalesce i (+ 2 i)) (setf SLASH nil))
+      SLASH (begin (case (IN i)
+                     ("*" (coalesce-block-comment (- i 1)))
+                     ("/" (coalesce-line-comment (- i 1)))
+                     (true nil))
+                   (setf SLASH nil))
+      (= "/" (IN i)) (setf SLASH true)
+      (= "\"" (IN i)) (coalesce-string i)
+      (= "'" (IN i)) (coalesce-string i)
+      )))
+
+(define (indent TXT n)
+  (join (clean empty? (parse TXT "\n")) (string "\n" (dup "  " n))))
+
+; Coalesce blocks recursively, adding a newline to it
+(define (coalesce-block i (DEPTH 0))
+  ;(write-line 2 (string "block level " DEPTH " from " i))
+  (let ((j 0) (END nil))
+    (for (j (+ 1 i) LAST 1 END)
+      (case (IN j)
+        ("{" (coalesce-block j (+ 1 DEPTH)))
+        ("}" (setf END j))
+        (true nil)))
+    (when END
+      (setf (IN i) " {\n")
+      (coalesce i END)
+      (setf (IN i) (indent (IN i) DEPTH))
+      (extend (IN i) (if (ends-with (IN i) "\n") "}\n" "\n}\n"))
+      (setf (IN END) "")
+      )))
+
+(for (i 0 LAST) (when (= ";" (IN i)) (setf (IN i) ";\n")))
+
+(for (i 0 LAST) (when (= "{" (IN i)) (coalesce-block i 1)))
+
+(write 1 (join (array-list IN)))
+
+(exit 0)