(run-scheme): Break up into new functions to facilitate starting
processes in other buffers.
(xscheme-start, xscheme-read-command-line): New functions.
(start-scheme, select-scheme)
(default-xscheme-runlight)
(global-set-scheme-interaction-buffer)
(local-set-scheme-interaction-buffer)
(local-clear-scheme-interaction-buffer)
(exit-scheme-interaction-mode)
(verify-xscheme-buffer): New functions.
(xscheme-process-name, xscheme-buffer-name)
(xscheme-runlight): New internal vars.
(default-xscheme-runlight): New const.
(xscheme-start-process): Add args for the process/buffer names.
(reset-scheme): Pass process/buffer names.
(scheme-interaction-mode): Initialize new local vars.
(reset-scheme, xscheme-send-string-2, xscheme-process-running-p)
(xscheme-select-process-buffer, xscheme-process-buffer)
(xscheme-send-region, xscheme-send-char, xscheme-send-interrupt)
(xscheme-goto-output-point, xscheme-write-message-1): Use new
var xscheme-process-name.
(xscheme-start-process): Initialize xscheme-process-name and
xscheme-buffer-name in the process buffer. Pass buffer name to
xscheme-modeline-initialize.
(xscheme-modeline-initialize): Add argument to specify buffer name
for mode-line vars.
(xscheme-process-sentinel): Make sure sentinel is run in the
process buffer so it sees its local vars.
(xscheme-process-filter-initialize, xscheme-set-runlight): More
elaborate logic to handle multiple-buffer mode lines.
(xscheme-enter-input-wait): Re-enable control-G handler upon
entering input wait.
(scheme-interaction-mode): Add arg to preserve local vars.
(xscheme-enter-interaction-mode)
(xscheme-enter-debugger-mode): Preserve local vars.
(xscheme-start-process): Clobber local vars.
(scheme-interaction-mode-commands): Allow end user to add commands
to scheme-interaction-mode keymap.
(scheme-interaction-mode-commands-alist): New variable.
(xscheme-send-string): Don't use insert-before-markers.
Implement a per-buffer kill ring:
(xscheme-insert-expression)
(xscheme-rotate-yank-pointer, xscheme-yank)
(xscheme-yank-pop, xscheme-yank-push): New functions.
(xscheme-expressions-ring)
(xscheme-expressions-ring-yank-pointer)
(xscheme-expressions-ring-max): New variables.
(xscheme-send-string-1): Call xscheme-insert-expression to save
expression in ring.
(xscheme-yank-previous-send): Now an alias for xscheme-yank.
(xscheme-previous-send): Deleted variable.
(xscheme-send-string-2, xscheme-send-char, xscheme-send-proceed,
xscheme-send-control-g-interrupt): Use process-send-string rather
than send-string.
(xscheme-send-region): Insert a newline after an expression that
is submitted in the interaction buffer, for consistency with
recent changes to Edwin.
(xscheme-delete-output): New function mimics comint-delete-output.
(xscheme-last-input-end): New internal variable.
(xscheme-process-filter-output): Update xscheme-last-input-end.
(xscheme-send-control-g-interrupt): Make sure that
xscheme-control-g-disabled-p is looked up in the right buffer.
(xscheme-enable-control-g): Clear C-g message if visible.
(xscheme-control-g-message-string): New internal var.
(xscheme-send-control-g-interrupt): Use new var.
(xscheme-send-control-g-interrupt, xscheme-send-interrupt): Delay
after sending interrupt in order to work around race condition.
(xscheme-send-control-g-interrupt, xscheme-send-interrupt)
(xscheme-send-char): Use xscheme-send-char rather than send-string
to send single char.
(xscheme-process-filter, xscheme-process-filter-alist): Add
support for evaluating expressions outside of the call-excursion.
(xscheme-process-filter:string-action-noexcursion): New func.
(xscheme-write-value): Change output string to match that used by Edwin.
(xscheme-coerce-prompt): Don't write a space after a command
prompt. The PROMPT-FOR-COMMAND- procedures will take care of this
for us.
(reset-scheme): Delete process after killing it.
