v0.14.0: sync org files with mouse selection and framebuffer inspection

org/framebuffer.org

@@ -306,6 +306,32 @@ Returns the number of changed cells."
     count))
 #+END_SRC
 
+** Frame inspection (for mouse selection / link clicking)
+
+#+BEGIN_SRC lisp :tangle ../src/rendering/framebuffer.lisp
+;;; --- Frame inspection ---------------------------------------------------
+
+(defun fb-cell-link-url (fb x y)
+  "Return the link URL at (X Y) in framebuffer FB, or nil."
+  (when (and (arrayp fb) (>= y 0) (< y (array-dimension fb 0))
+             (>= x 0) (< x (array-dimension fb 1)))
+    (let ((c (aref fb y x)))
+      (cell-link-url c))))
+
+(defun extract-text (fb x1 y1 x2 y2)
+  "Extract visible text from the rectangle between (X1,Y1) and (X2,Y2)."
+  (let ((x-min (min x1 x2)) (x-max (max x1 x2))
+        (y-min (min y1 y2)) (y-max (max y1 y2))
+        (h (if (arrayp fb) (array-dimension fb 0) 0))
+        (w (if (arrayp fb) (array-dimension fb 1) 0)))
+    (with-output-to-string (s)
+      (loop for y from y-min to (min y-max (1- h))
+            do (loop for x from x-min to (min x-max (1- w))
+                     do (let ((c (aref fb y x)))
+                          (princ (cell-char c) s)))
+               (when (< y y-max) (princ #\Newline s))))))
+#+END_SRC
+
 ** Scissor clipping
 
 #+BEGIN_SRC lisp :tangle ../src/rendering/framebuffer.lisp