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;;; geiser-debug.el -- displaying debug information and evaluation results
;; Copyright (C) 2009, 2010 Jose Antonio Ortega Ruiz
;; This program is free software; you can redistribute it and/or
;; modify it under the terms of the Modified BSD License. You should
;; have received a copy of the license along with this program. If
;; not, see <http://www.xfree86.org/3.3.6/COPYRIGHT2.html#5>.
;; Start date: Mon Feb 23, 2009 22:34
(require 'geiser-edit)
(require 'geiser-autodoc)
(require 'geiser-impl)
(require 'geiser-eval)
(require 'geiser-menu)
(require 'geiser-popup)
(require 'geiser-base)
;;; Customization:
(defgroup geiser-debug nil
"Debugging and error display options."
:group 'geiser)
(geiser-custom--defcustom geiser-debug-always-display-sexp-after-p nil
"Whether to always display the sexp whose evaluation caused an
error after the error message in the debug pop-up. If nil,
expressions shorter than `geiser-debug-long-sexp-lines` lines are
show before the error message."
:group 'geiser-debug
:type 'boolean)
(geiser-custom--defcustom geiser-debug-long-sexp-lines 6
"Length of an expression in order to be relegated to the bottom
of the debug pop-up (after the error message). If
`geiser-debug-always-display-sexp-after-p` is t, this variable
has no effect."
:group 'geiser-debug
:type 'int)
;;; Debug buffer mode:
(defvar geiser-debug-mode-map
(let ((map (make-sparse-keymap)))
(suppress-keymap map)
(set-keymap-parent map button-buffer-map)
map))
(defun geiser-debug-mode ()
"A major mode for displaying Scheme compilation and evaluation results.
\\{geiser-debug-mode-map}"
(interactive)
(kill-all-local-variables)
(buffer-disable-undo)
(use-local-map geiser-debug-mode-map)
(set-syntax-table scheme-mode-syntax-table)
(setq mode-name "Geiser DBG")
(setq major-mode 'geiser-debug-mode)
(setq next-error-function 'geiser-edit--open-next)
(setq buffer-read-only t))
(defun geiser-debug--button-p (nextp)
(let ((m (funcall (if nextp 'next-button 'previous-button) (point))))
(and m (funcall (if nextp '< '>) (point) (marker-position m)))))
(geiser-menu--defmenu debug geiser-debug-mode-map
("Next error" "n" forward-button :enable (geiser-debug--button-p t))
("Previous error" "p" backward-button :enable (geiser-debug--button-p t))
--
("Quit" nil View-quit))
;;; Buffer for displaying evaluation results:
(geiser-popup--define debug "*Geiser dbg*" geiser-debug-mode)
;;; Displaying retorts
(geiser-impl--define-caller geiser-debug--display-error
display-error (module key message)
"This method takes 3 parameters (a module name, the error key,
and the accompanying error message) and should display
(in the current buffer) a formatted version of the error. If the
error was successfully displayed, the call should evaluate to a
non-null value.")
(geiser-impl--define-caller geiser-debug--enter-debugger
enter-debugger ()
"This method is called upon entering the debugger, in the REPL
buffer.")
(defun geiser-debug--display-after (what)
(or geiser-debug-always-display-sexp-after-p
(>= (with-temp-buffer
(insert what)
(count-lines (point-min) (point-max)))
geiser-debug-long-sexp-lines)))
(defun geiser-debug--display-retort (what ret &optional res)
(let* ((err (geiser-eval--retort-error ret))
(key (geiser-eval--error-key err))
(output (geiser-eval--retort-output ret))
(impl geiser-impl--implementation)
(module (geiser-eval--get-module))
(jump nil)
(dir default-directory)
(buffer (current-buffer))
(debug (eq key 'geiser-debugger))
(after (geiser-debug--display-after what)))
(when debug
(switch-to-geiser nil nil buffer)
(geiser-debug--enter-debugger impl))
(geiser-debug--with-buffer
(erase-buffer)
(when dir (setq default-directory dir))
(unless after
(insert what)
(newline 2))
(when (and res (not err))
(insert res)
(newline 2))
(setq jump (geiser-debug--display-error impl module key output))
(when after (insert "\nExpression evaluated was:\n\n" what))
(goto-char (point-min)))
(when jump (geiser-debug--pop-to-buffer))))
(defsubst geiser-debug--wrap-region (str)
(format "(begin %s)" str))
(defun geiser-debug--unwrap (str)
(if (string-match "(begin[ \t\n\v\r]+\\(.+\\)*)" str)
(match-string 1 str)
str))
(defun geiser-debug--send-region (compile start end and-go wrap)
(let* ((str (buffer-substring-no-properties start end))
(wrapped (if wrap (geiser-debug--wrap-region str) str))
(code `(,(if compile :comp :eval) (:scm ,wrapped)))
(ret (geiser-eval--send/wait code))
(res (geiser-eval--retort-result-str ret))
(err (geiser-eval--retort-error ret)))
(geiser-autodoc--clean-cache)
(when and-go (funcall and-go))
(when (not err) (message "%s" res))
(geiser-debug--display-retort (geiser-syntax--scheme-str str) ret res)))
(defun geiser-debug--expand-region (start end all wrap)
(let* ((str (buffer-substring-no-properties start end))
(wrapped (if wrap (geiser-debug--wrap-region str) str))
(code `(:eval (:ge macroexpand (quote (:scm ,wrapped))
,(if all :t :f))))
(ret (geiser-eval--send/wait code))
(err (geiser-eval--retort-error ret))
(result (geiser-eval--retort-result ret)))
(if err
(geiser-debug--display-retort str ret)
(geiser-debug--with-buffer
(erase-buffer)
(insert (format "%s" (if wrap (geiser-debug--unwrap result) result)))
(goto-char (point-min)))
(geiser-debug--pop-to-buffer))))
(provide 'geiser-debug)
;;; geiser-debug.el ends here
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