Fixes #3

buffer.rkt

@@ -8,7 +8,7 @@
 (define-generics buffer
   (buffer-resize! buffer rows cols)
   (buffer-start! buffer rows cols)
-  (buffer-commit! buffer))
+  (buffer-commit! buffer #:cursor? [cursor?]))
 
 (define symbol->style
   `#hasheq([normal . ,A:style-normal]
@@ -91,9 +91,9 @@
              (set! cur-c (add1 cur-c)))
 
            #t]))))
-   (define (buffer-commit! buf)
+   (define (buffer-commit! buf #:cursor? [cursor? #t])
      (terminal-buffer-define buf)
-     (display (A:show-cursor) op)
+     (when cursor? (display (A:show-cursor) op))
      (flush-output op))])
 
 (struct output-cell (s f b ch) #:mutable #:transparent)
@@ -154,7 +154,7 @@
      (buffer-resize! buf draw-rows draw-cols)
      (clear-cells! cells)
      (values draw-rows draw-cols (draw-cell! cells)))
-   (define (buffer-commit! buf)
+   (define (buffer-commit! buf #:cursor? [cursor? #t])
      (output-buffer-define buf)
      (for/fold ([last-s 'normal] [last-f #f] [last-b #f])
                ([row (in-vector (cells-vec cells))])
@@ -218,7 +218,7 @@
                (set! last-row r)
                (set! last-col c)
                (dc s f b r c ch))))
-   (define (buffer-commit! buf)
+   (define (buffer-commit! buf #:cursor? [cursor? #t])
      (cached-buffer-define buf)
      (define inner-buf (if clear-next? term-yclear term-nclear))
      (set! clear-next? #f)
@@ -235,7 +235,7 @@
            (match-define (output-cell s f b new-ch) new-cell)
            (draw! s f b r c (or new-ch #\space)))))
      (draw! 'normal #f #f last-row last-col #f)
-     (super-buffer-commit! inner-buf)
+     (super-buffer-commit! inner-buf #:cursor? cursor?)
      (swap! new-cells cur-cells))])
 
 (define-syntax-rule (swap! x y)
@@ -262,7 +262,7 @@
                    exact-nonnegative-integer? exact-nonnegative-integer? (or/c char? #f)
                    boolean?)))]
   [buffer-commit!
-   (-> buffer? void?)]
+   (->* (buffer?) (#:cursor? boolean?) void?)]
   [make-terminal-buffer
    (->* (exact-nonnegative-integer? exact-nonnegative-integer?)
         (#:clear? boolean? #:output output-port?)

draw.rkt

@@ -34,6 +34,11 @@
 ;; ! : okay? (row col char -> void) row col -> bool
 (struct raart (w h !))
 
+(struct meta-raart raart (m))
+(define (without-cursor x)
+  (match-define (raart w h !) x)
+  (meta-raart w h ! '(without-cursor)))
+
 (define (draw buf x)
   (match-define (raart w h !) x)
   (define-values
@@ -49,7 +54,9 @@
                          c r
                          (+ c w) (+ r h)))
   (! on-screen? draw-with-params 0 0)
-  (buffer-commit! buf))
+  (define without-cursor?
+    (memq 'without-cursor (if (meta-raart? x) (meta-raart-m x) '())))
+  (buffer-commit! #:cursor? (not without-cursor) buf))
 
 (define (raart* w h !)
   (raart w h
@@ -417,5 +424,7 @@
                 raart? raart?)]
   [place-cursor-after
    (-> raart? exact-nonnegative-integer? exact-nonnegative-integer?
-       raart?)])
+       raart?)]
+  [without-cursor
+   (-> raart? raart?)])
  place-at*)

t/hack.rkt

@@ -53,18 +53,19 @@
        ["q" #f]))
    (define (word-output w)
      (hack-define w)
-     (crop 0 cols 0 rows
-           (vappend
-            #:halign 'left
-            (text (~a "Hello Jack! Enjoy the hacking! Press q to quit."))
-            (place-at*
-             (for/fold ([c (blank world-cols world-rows)])
-                       ([o (in-list objs)])
-               (obj-define o)
-               (place-at c oy ox (fg 'blue (char oc))))
-             [py px (fg 'red (char #\@))])
-            (text (~a "Jack the Paren Hunter"))
-            (happend (text (~a "Steps: " steps " Score: " score))))))
+     (without-cursor
+      (crop 0 cols 0 rows
+            (vappend
+             #:halign 'left
+             (text (~a "Hello Jack! Enjoy the hacking! Press q to quit."))
+             (place-at*
+              (for/fold ([c (blank world-cols world-rows)])
+                        ([o (in-list objs)])
+                (obj-define o)
+                (place-at c oy ox (fg 'blue (char oc))))
+              [py px (fg 'red (char #\@))])
+             (text (~a "Jack the Paren Hunter"))
+             (happend (text (~a "Steps: " steps " Score: " score)))))))
    (define (word-return w)
      (hack-define w)
      (~a "You got " score " parens in " steps " steps!"))])