considered as visible to trigger the display engine.
* lisp/xwidget.el (xwidget-display): Force the display engine to create a
xwidget_view of the given xwidget.
Note: It is not longer necessary to delete xwidget with killed buffer
here because it is done automatically when a buffer is killed.
(Fdelete_xwidget_view): New function to delete the given
xwidget-view.
* lisp/xwidget.el (xwidget-delete-zombies): Re-implementation.
* src/xwidget.c (Fxwidget_delete_zombies): Re-implemented in Lisp. Note: It is not longer necessary to delete xwidget with killed buffer here because it is done automatically when a buffer is killed. (Fdelete_xwidget_view): New function to delete the given xwidget-view. * lisp/xwidget.el (xwidget-delete-zombies): New implementation.
kill xwidget when the buffer is killed without confirmation.
(Fset_xwidget_query_on_exit_flag): New function to set the `query-on-exit'
flag.
(Fxwidget_query_on_exit_flag): New function to retrieve the value of the
`query-on-exit' flag.
(Fmake_xwidget): Set the `query-on-exit' flag to t by default.
* src/xwidget.h (xwidget): Add new field `kill_without_query'.
* lisp/xwidget.el (xwidget-kill-buffer-query-function): Ask for
confirmation before killing the buffer if a xwidget is present only if its
`query-on-exit' flag is enabled.
* lisp/xwidget.el (xwidget-kill-buffer-query-function): New function to
query a user before killing a buffer with xwidgets in it.
This function is stored in `kill-buffer-query-functions' and called from
`kill-buffer'.
* src/buffer.c (Fkill_buffer): Call `kill_buffer_xwidgets'.
* src/xwidget.c (kill_buffer_xwidgets): Delete xwidgets attached to the
specified buffer.
* src/xwidget.h (kill_buffer_xwidgets): Add definition.
The docstring now lists the types accepted.
The GCPROtection has also been removed because it wasn't necessary (no
call to Feval/eval_sub either directly or indirectly).
(syms_of_xwidget): Add a comment to remind us to update the docstring of
`Fmake_xwidget' if new types are added.
