bug#9663: 23.2; feature wish: put priority on vcursor overlay

[Hendrik Tews <hendrik@askra.de>]

Hi,

the vcursor is invisible in the locked regions of Proof General,
because the overlay of the locked region has priority 100 and the
vcursor overlay has no priority set. 

Below I attach a patch that adds a defcustom
vcursor-overlay-priority to the vcursor package, which fixes this
problem. (I hereby assign copyright in this patch to the emacs
project/FSF.)

Bye,

Hendrik Tews


*** vcursor-23.2.el     2011-10-03 21:33:10.000000000 +0200
--- vcursor.el  2011-10-03 21:29:59.000000000 +0200
*************** scrolling set this.  It is used by the `
*** 508,513 ****
--- 508,521 ----
    :type 'boolean
    :group 'vcursor)
  
+ (defcustom vcursor-overlay-priority 500
+   "Priority of the overlay that symbolizes the vcursor.
+ Increase this value if the vcursor becomes invisible when moving
+ into other specifically colored regions of text."
+   :type 'integer
+   :group 'vcursor
+   :version "23.4")
+ 
  (defvar vcursor-temp-goal-column nil
    "Keeps track of temporary goal columns for the virtual cursor.")
  
*************** another window.  With LEAVE-W, use the c
*** 657,663 ****
        (or window-system
          (display-color-p)
          (overlay-put vcursor-overlay 'before-string vcursor-string))
!       (overlay-put vcursor-overlay 'face 'vcursor))
      (or leave-w (vcursor-find-window nil t))
      ;; vcursor-window now contains the right buffer
      (or (pos-visible-in-window-p pt vcursor-window)
--- 665,672 ----
        (or window-system
          (display-color-p)
          (overlay-put vcursor-overlay 'before-string vcursor-string))
!       (overlay-put vcursor-overlay 'face 'vcursor)
!       (overlay-put vcursor-overlay 'priority vcursor-overlay-priority))
      (or leave-w (vcursor-find-window nil t))
      ;; vcursor-window now contains the right buffer
      (or (pos-visible-in-window-p pt vcursor-window)