commit 928084c3219a872bbde0f544ab1a0f0890decc02
parent 6221a5db83d7ea37dfb7399a57ae7c2273980ec5
Author: Georges Dupéron <georges.duperon@gmail.com>
Date: Mon, 15 May 2017 02:59:15 +0200
added/removed/original higlighting
Diffstat:
| A | testtt.hl.rkt | | | 287 | +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
1 file changed, 287 insertions(+), 0 deletions(-)
diff --git a/testtt.hl.rkt b/testtt.hl.rkt
@@ -0,0 +1,286 @@
+#lang hyper-literate #:♦ (dotlambda/unhygienic . racket/base)
+
+♦title{testttt}
+
+♦(require (for-syntax syntax/parse
+ (rename-in racket/base [... …]))
+ scribble/core
+ scribble/html-properties)
+♦(elem
+ #:style (style "dim"
+ (list (css-addition
+ #"
+.el-dim {
+ filter: brightness(150%) contrast(30%) opacity(0.7);
+ background: none; /* rgba(82, 103, 255, 0.36); */
+}
+
+.el-hliteadd{
+ filter: initial;
+ background: rgba(108, 175, 108, 0.36);
+}
+
+.el-hliterm {
+ filter: initial;
+ background: rgba(173, 54, 54, 0.36);
+}
+
+.el-undim {
+ filter: initial;
+ background: none;
+}")
+
+ (js-addition
+ #"
+(function(f) {
+ // A 'simple' onLoad function
+ if (window.document.readyState == 'complete') {
+ f();
+ } else if (window.document.addEventListener) {
+ window.document.addEventListener('DOMContentLoaded', f, false);
+ } else if (window.attachEvent) {
+ window.attachEvent('onreadystatechange', function() {
+ if (window.document.readyState == 'complete') {
+ f();
+ }
+ });
+ } else {
+ var oldLoad = window.onload;
+ if (typeof(oldLoad) == 'function') {
+ window.onload = function() {
+ try {
+ oldLoad();
+ } finally {
+ f();
+ }
+ };
+ } else {
+ window.onload = f;
+ }
+ }
+})(function() {
+ var process = function (startmode, start){
+ if (!(start.classList.contains(startmode))) {
+ return; // early return, we have already handled this element.
+ }
+
+ while (!(start.classList.contains('SCodeFlow'))){
+ start = start.parentNode;
+ if (start == document) {
+ return; // abort for this node
+ }
+ }
+ var loopfn = function(mode, e) {
+ var chs = e.childNodes;
+ var copychs = [];
+ // Copy the array-ish in cas replacing elements causes JS to update it.
+ for (var chi = 0; chi < chs.length; chi++) {
+ copychs[chi] = chs.item(chi);
+ }
+ for (var chi = 0; chi < copychs.length; chi++) {
+ var ch = copychs[chi];
+ if (ch.nodeType == Node.ELEMENT_NODE && ch.classList !== undefined) {
+ if (ch.classList.contains('dim')) {
+ ch.classList.remove('dim');
+ mode = 'dim';
+ continue;
+ } else if (ch.classList.contains('hliteadd')) {
+ ch.classList.remove('hliteadd');
+ mode = 'hliteadd';
+ continue;
+ } else if (ch.classList.contains('hliterm')) {
+ ch.classList.remove('hliterm');
+ mode = 'hliterm';
+ continue;
+ } else if (ch.classList.contains('undim')) {
+ ch.classList.remove('undim');
+ mode = 'undim';
+ continue;
+ } else {
+ mode = loopfn(mode, ch);
+ }
+ } else if (ch.nodeType == Node.TEXT_NODE) {
+ // Replace the text node with a span with the correct class.
+ var s = document.createElement('span');
+ s.classList.add('el-' + mode);
+ e.replaceChild(s, ch);
+ s.appendChild(ch);
+ }
+ }
+ return mode;
+ }
+ loopfn('undim', start);
+ };
+
+ var outerloop = function(mode){
+ var listish = document.getElementsByClassName(mode);
+ var copylist = [];
+ for (var starti = 0; starti < listish.length; starti++) {
+ // We must copy the list because it is automatically updated
+ // when mutating the DOM.
+ copylist[starti] = listish.item(starti);
+ }
+ for (var starti = 0; starti < copylist.length; starti++) {
+ process(mode, copylist[starti]);
+ }
+ }
+
+ outerloop('dim');
+ outerloop('hliteadd');
+ outerloop('hliterm');
+ outerloop('undim');
+});
+"))))
+
+
+♦(begin-for-syntax
+ (define (dim-elt loc)
+ (datum->syntax #'here (syntax->datum #'#,(elem #:style "dim")) loc))
+ (define (undim-elt loc)
+ (datum->syntax #'here (syntax->datum #'#,(elem #:style "undim")) loc))
+ (define (hliteadd-elt loc)
+ (datum->syntax #'here (syntax->datum #'#,(elem #:style "hliteadd")) loc))
+ (define (hliterm-elt loc)
+ (datum->syntax #'here (syntax->datum #'#,(elem #:style "hliterm")) loc))
+
+ ;; Old implementation. Does not get the srclocs right for the escaped parts.
+ #;(define-syntax-class pat
+ #:attributes (xpat xres)
+ (pattern {~literal /}
+ #:with xpat #'{~seq}
+ #:with xres #'#,(dim-elt))
+ (pattern {~literal =}
+ #:with xpat #'{~seq}
+ #:with xres #'#,(undim-elt))
+ (pattern {~literal …}
+ #:with xpat #'(… …)
+ #:with xres #'xpat)
+ (pattern x:id
+ #:with (xpat) (generate-temporaries #'(x))
+ #:with _ (begin (displayln (list #'x #'xpat)) 0)
+ #:with xres #'xpat)
+ (pattern (p:pat …)
+ #:with (whole) (generate-temporaries #'(whole))
+ #:with xpat #'{~and whole (p.xpat …)}
+ #:with xres #'#,(quasisyntax/loc #'whole (p.xres …)))))
+
+♦(define-syntax (hlite stx)
+ (define (stx-or-first b)
+ (if (syntax? b)
+ b
+ (car b)))
+ (syntax-case stx ()
+ [(self name guide1 . body)
+ (and (identifier? #'self)
+ (identifier? #'name))
+ (let ()
+ (define disp
+ (let loop ([guide #'(_ _ _ . guide1)]
+ [body (datum->syntax
+ stx
+ `(,(datum->syntax #'here 'chunk #'self)
+ #:display-only
+ ,#'name
+ . ,(syntax-e #'body))
+ stx)])
+ (cond
+ [(and (identifier? guide)
+ (free-identifier=? guide (quote-syntax …)))
+ (raise-syntax-error 'hlite
+ "ellipses are not supported (yet)"
+ guide)]
+ [(and (identifier? guide) (free-identifier=? guide #'/))
+ (dim-elt (stx-or-first body))]
+ [(and (identifier? guide) (free-identifier=? guide #'=))
+ (undim-elt (stx-or-first body))]
+ [(and (identifier? guide) (free-identifier=? guide #'-))
+ (hliterm-elt (stx-or-first body))]
+ [(and (identifier? guide) (free-identifier=? guide #'+))
+ (hliteadd-elt (stx-or-first body))]
+ [(identifier? guide)
+ body]
+ [(syntax? guide)
+ ;; TODO: probably not the best course of action (we're
+ ;; loosing some of the stx-list vs stx-pair information
+ ;; here).
+ (loop (syntax-e guide) body)]
+ ;; TODO: check that this never lets "body" be something else
+ ;; than a syntax object or a list starting with a syntax
+ ;; object.
+ [(and (pair? guide)
+ (identifier? (car guide))
+ (or (free-identifier=? (car guide) #'/)
+ (free-identifier=? (car guide) #'=)
+ (free-identifier=? (car guide) #'-)
+ (free-identifier=? (car guide) #'+)))
+ (cons (loop (car guide) body)
+ (loop (cdr guide) body))]
+ [(syntax? body)
+ (datum->syntax body
+ (loop guide (syntax-e body))
+ body
+ body)]
+ [(pair? guide)
+ (unless (pair? body)
+ (raise-syntax-error
+ 'hlite
+ (format
+ "expected a pair, as indicated by the pattern ~a"
+ (syntax->datum (datum->syntax #f guide)))
+ body
+ #f))
+ (cons (loop (car guide) (car body))
+ (loop (cdr guide) (cdr body)))]
+ [else
+ body])))
+ #`(begin
+ (chunk #:save-as dummy name . body)
+ #,disp))])
+
+ ;; Old implementation. Does not get the srclocs right for the escaped parts.
+ #;(syntax-parser
+ [(self name :pat . body)
+ (displayln this-syntax)
+ (local-require racket/pretty)
+ (define result
+ #`(begin
+ #,#'(define-syntax do-it
+ (syntax-parser
+ [(self2 . xpat)
+ #:with chk (syntax/loc #'self2 chunk)
+ (displayln (quasisyntax/loc this-syntax
+ (chk name . xres)))
+ #,(quasisyntax/loc this-syntax
+ (chk name . xres))]))
+ #,(quasisyntax/loc this-syntax
+ (#,(syntax/loc #'self do-it) . body))))
+ (pretty-print (syntax->datum result))
+ result]))
+
+We define the function foo as follows:
+
+♦chunk[<foo>
+ (define (foo v)
+ (+ 1 v))]
+
+However, due to implementation details, we need to add ♦racket[π] to this
+value:
+
+♦hlite[|<foo'>| {/ (def args (_ _ + _ / _))}
+ (define (foo v)
+ (+ 1 π v))]
+
+In order to optimise the sum of ♦racket[1] and ♦racket[π], we extract the
+computation to a global helper constant:
+
+♦hlite[|<foo''>| {+ _ _ / (def args (_ - _ _ + _ / _))}
+ (define π 3.1414592653589793)
+ (define one-pus-π (+ 1 π))
+ (define (foo v)
+ (+ 1 π one-pus-π v))]
+
+The whole program is therefore:
+
+♦chunk[<*>
+ |<foo''>|
+ (foo 42)]
+\ No newline at end of file
