start work on guide section on data; add support for styled paragraphs; fix interactions and state

svn: r6328

original commit: 5cd9016cc182447307ba4eafc7bde513647cb637

collects/scribble/decode.ss

@@ -115,7 +115,7 @@
                                       (part-start-tag s)
                                       (part-start-title s)
                                       (add1 part-depth))]
-                      [part (decode-part l tag title part-depth)])
+                      [part (decode-flow* l tag style title part-depth)])
                   (make-styled-part (part-tag part)
                                     (part-title-content part)
                                     (part-collected-info part)

collects/scribble/eval.ss

@@ -121,9 +121,20 @@
         (parameterize ([current-output-port o])
           (with-handlers ([exn? (lambda (e)
                                   (exn-message e))])
-            (cons (do-plain-eval s #t)
+            (cons (let ([v (do-plain-eval s #t)])
+                    (copy-value v))
                   (get-output-string o)))))]))
 
+  ;; Since we evaluate everything in an interaction before we typeset,
+  ;;  copy each value to avoid side-effects.
+  (define (copy-value v)
+    (cond
+     [(string? v) (string-copy v)]
+     [(bytes? v) (bytes-copy v)]
+     [(pair? v) (cons (copy-value (car v))
+                      (copy-value (cdr v)))]
+     [else v]))
+
   (define (strip-comments s)
     (cond
      [(and (pair? s)

collects/scribble/html-render.ss

@@ -127,7 +127,10 @@
         (render-flow* p part ht #t))
 
       (define/override (render-paragraph p part ht)
-        `((p ,@(super render-paragraph p part ht))))
+        `((p ,@(if (styled-paragraph? p)
+                   `(((class ,(styled-paragraph-style p))))
+                   null)
+             ,@(super render-paragraph p part ht))))
 
       (define/override (render-element e part ht)
         (cond

collects/scribble/scribble.css

@@ -9,6 +9,22 @@
                margin-right: auto;
                }
 
+               .refpara { 
+                display: block;
+                position: relative;
+                left: 37em;
+                top: -1em;
+                height: 0em;
+               }
+
+               .refcontent { 
+                background-color: beige;
+                display: block;
+                position: relative;
+                width: 10em;
+                font-size: 85%;
+               }
+
                h1,h2,h3,h4,h5,h6 {
                margin-top: .5em;
                }

collects/scribble/struct.ss

@@ -60,6 +60,7 @@
    [(unnumbered-part part) ()]
    [flow ([paragraphs (listof flow-element?)])]
    [paragraph ([content list?])]
+   [(styled-paragraph paragraph) ([style any/c])]
    [table ([style any/c]
            [flowss (listof (listof flow?))])]
    [delayed-flow-element ([render (any/c part? any/c . -> . flow-element?)])]