Creating small evaluation prompt

1 files changed, 48 insertions, 0 deletions

diff --git a/scripts/prompt.scm b/scripts/prompt.scm
new file mode 100644
index 0000000..738cd42
--- /dev/null
+++ b/scripts/prompt.scm
@@ -0,0 +1,48 @@
+(define prompt-active #f)
+(define prompt-box (make-rect 0 0 800 20))
+(define prompt-text "")
+
+(define (prompt-update)
+  (let ((key-pressed (rl-get-key-pressed)))
+    
+    
+    (if (eq? key-pressed 161)
+	(set! prompt-active (not prompt-active))
+	)
+    
+    (if prompt-active
+	(begin
+	  (let ((key (rl-get-char-pressed)))
+	    (cond ((and (>= key 32) (<= key 125))
+		   (set! prompt-text
+			 (string-append prompt-text (string (integer->char key)))))
+		  ))
+	  
+	  (if (rl-is-key-down KEY_ENTER)
+	      (begin
+		(eval-string prompt-text)
+		(set! prompt-text "")
+		))
+	  
+	  (if (eq? key-pressed KEY_BACKSPACE)
+	      (let ((n (string-length prompt-text)))
+		(cond ((>= n 1)
+		       (set! prompt-text (substring prompt-text 0 (- n 1))))
+		      )))
+	  
+	  ))
+    )
+  )
+
+(define (prompt-draw)
+  (if prompt-active
+      (begin
+	(rl-draw-rectangle
+	 (rect-x prompt-box)
+	 (rect-y prompt-box)
+	 (rect-width prompt-box)
+	 (rect-height prompt-box)
+	 (make-color 190 100 255))
+	(rl-draw-text prompt-text 0 0 20 (make-color 0 0 0))
+	))
+  )