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|
;;;;; -*-coding: iso-8859-1;-*-
;;;;;
;;;;; Copyright (C) 1991-2002 Lysator Academic Computer Association.
;;;;;
;;;;; This file is part of the LysKOM Emacs LISP client.
;;;;;
;;;;; LysKOM is free software; you can redistribute it and/or modify it
;;;;; under the terms of the GNU General Public License as published by
;;;;; the Free Software Foundation; either version 2, or (at your option)
;;;;; any later version.
;;;;;
;;;;; LysKOM is distributed in the hope that it will be useful, but WITHOUT
;;;;; ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
;;;;; FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
;;;;; for more details.
;;;;;
;;;;; You should have received a copy of the GNU General Public License
;;;;; along with LysKOM; see the file COPYING. If not, write to
;;;;; Lysator, c/o ISY, Linkoping University, S-581 83 Linkoping, SWEDEN,
;;;;; or the Free Software Foundation, Inc., 675 Mass Ave, Cambridge,
;;;;; MA 02139, USA.
;;;;;
;;;;; Please mail bug reports to bug-lyskom@lysator.liu.se.
;;;;;
;;;; ================================================================
;;;; ================================================================
;;;;
;;;; File: macros.el
;;;;
;;;; This file contains the macros which must be loaded before lyskom can
;;;; be compiled.
;;;;
;;;
;;; Require parts of the widget package. We do this to avoid generating
;;; errors later on. This sucks.
;;;
(require 'custom)
(require 'widget)
;;; ======================================================================
;;; lyskom-traverse - traverse a sequence.
;;;
(defmacro lyskom-traverse (atom sequence &rest body)
"Bind ATOM to each element in SEQUENCE and execute BODY.
Value returned is always nil."
(let ((seq-sym (make-symbol "sequence"))
(len-sym (make-symbol "len"))
(idx-sym (make-symbol "index")))
`(catch 'lyskom-traverse
(let* ((,seq-sym ,sequence)
(,idx-sym 0)
(,len-sym (or (listp ,seq-sym)
(length ,seq-sym)))
(,atom nil))
(if (listp ,seq-sym)
(while ,seq-sym
(setq ,atom (car ,seq-sym))
,@body
(setq ,seq-sym (cdr ,seq-sym)))
(while (< ,idx-sym ,len-sym)
(setq ,atom (aref ,seq-sym ,idx-sym))
,@body
(setq ,idx-sym (1+ ,idx-sym))))))))
(defmacro lyskom-traverse-membership (var &rest forms)
"Traverse the membership list.
Variable VAR is bound to each membership, in turn, and FORMS are evaluated."
(let ((el-sym (make-symbol "el")))
`(catch 'lyskom-traverse
(let ((,el-sym (membership-list->head
(lyskom-with-lyskom-buffer (lyskom-mship-cache-data))))
(,var nil))
(while ,el-sym
(setq ,var (mship-list-node->data ,el-sym))
,@forms
(setq ,el-sym (mship-list-node->next ,el-sym)))))))
(defmacro lyskom-traverse-aux (atom sequence &rest body)
"Bind ATOM to each element in SEQUENCE and execute BODY.
Value returned is always nil."
(let ((seq-sym (make-symbol "aux-items")))
`(catch 'lyskom-traverse
(let ((,seq-sym ,sequence)
(,atom nil))
(while ,seq-sym
(setq ,atom (car ,seq-sym))
(if (not (aux-item-flags->deleted
(aux-item->flags ,atom)))
(progn ,@body))
(setq ,seq-sym (cdr ,seq-sym)))))))
(defmacro lyskom-traverse-break (&optional result)
"Break a current lyskom-traverse"
`(throw 'lyskom-traverse ,result))
(put 'lyskom-traverse-aux 'edebug-form-spec '(sexp form body))
(put 'lyskom-traverse-aux 'lisp-indent-hook 2)
(put 'lyskom-traverse-membership 'edebug-form-spec '(sexp body))
(put 'lyskom-traverse-membership 'lisp-indent-hook 1)
(put 'lyskom-traverse 'lisp-indent-hook 2)
(put 'lyskom-traverse 'edebug-form-spec '(sexp form body))
;;; ======================================================================
;;; lyskom-save-excursion Does not save point and mark.
;;;
(defmacro lyskom-save-excursion (&rest forms)
"Save-excursion without saving point and mark."
(list 'let (list '(__buffer__ (current-buffer)))
(list 'unwind-protect
(cons 'progn
forms)
'(set-buffer __buffer__))))
(put 'lyskom-save-excursion 'edebug-form-spec t)
(put 'lyskom-save-excursion 'lisp-indent-hook 0)
(defmacro lyskom-with-lyskom-buffer (&rest forms)
"Evaluate FORMS in the current LysKOM buffer."
`(save-current-buffer
(set-buffer lyskom-buffer)
,@forms))
(put 'lyskom-with-lyskom-buffer 'edebug-form-spec t)
(put 'lyskom-with-lyskom-buffer 'lisp-indent-hook 0)
;;; ======================================================================
;;; Some useful macros to make the code more readable.
;;;
(defmacro char-in-string (char string)
"Return t if the character CHAR is member of STRING. Otherwise return nil."
(list 'null
(list 'not
(list 'string-match
(list 'regexp-quote
(list 'char-to-string char))
string))))
(defmacro ++ (var)
"Increment the variable VAR and return the value."
(list 'setq var (list '1+ var)))
(defmacro -- (var)
"Decrement the variable VAR and return the value."
(list 'setq var (list '1- var)))
(eval-and-compile
(if (fboundp 'when)
nil
(defmacro when (expr &rest body)
"Execute BODY if EXPR evaluates to non-nil"
(list 'if expr (cons 'progn body)))
(put 'when lisp-indent-function 1)
(put 'when 'edebug-form-spec t)))
(eval-and-compile
(if (fboundp 'unless)
nil
(defmacro unless (expr &rest body)
"Execute BODY if EXPR evaluates to non-nil"
(append (list 'if expr nil) body))
(put 'unless lisp-indent-function 1)
(put 'unless 'edebug-form-spec t)))
;;; ======================================================================
;;; Multiple blocking read from server
;;;
(defmacro blocking-do-multiple (bind-list &rest body)
"Bind variables according to BIND-LIST and then eval BODY.
The value of the last form in BODY is returned.
Each element in BIND-LIST is a list (SYMBOL FORM) which binds SYMBOL to
the result of the server call FORM, which is the same as used in blocking-do.
All the forms in BIND-LIST are evaluated before any symbols are bound."
(let ((index 0))
`(let ((lyskom-multiple-bind-sym
(lyskom-blocking-do-multiple
(list ,@(mapcar (lambda (x)
`(list ',(car (car (cdr x)))
,@(cdr (car (cdr x)))))
bind-list)))))
(let (,@(mapcar (lambda (bpat)
(prog1
`(,(car bpat) (elt lyskom-multiple-bind-sym
,index))
(setq index (1+ index))))
bind-list))
,@body))))
(put 'blocking-do-multiple 'edebug-form-spec '(sexp body))
(put 'blocking-do-multiple 'lisp-indent-function 1)
;;; ======================================================================
;;; Some commands generat async messages we don't really want
;;;
(defmacro lyskom-ignoring-async (async &rest body)
`(let ((lyskom-ignoring-async-list
(cons (list ,@async) lyskom-ignoring-async-list)))
,@body))
(put 'lyskom-ignoring-async 'edebug-form-spec
'(sexp body))
(put 'lyskom-ignoring-async 'lisp-indent-function 1)
;;; ======================================================================
;;; These macros do magic things to the compiler to avoid gratuitous
;;; compiler warnings.
;;;
(eval-and-compile (defvar lyskom-expected-unresolved-functions nil))
(eval-and-compile (defvar lyskom-expected-unresolved-functions-temp nil))
(defmacro lyskom-external-function (fn)
`(eval-when-compile
(setq lyskom-expected-unresolved-functions
(cons ',fn lyskom-expected-unresolved-functions))))
(defmacro lyskom-with-external-functions (fns &rest body)
"Ignore warnings about unresolved functions FNS when compiling BODY."
`(progn (eval-when-compile
(and (boundp 'byte-compile-unresolved-functions)
(setq lyskom-expected-unresolved-functions-temp
(cons (delq nil
(mapcar (lambda (fn)
(if (assq fn byte-compile-unresolved-functions)
nil
fn))
',fns))
lyskom-expected-unresolved-functions-temp))))
,@body
(eval-when-compile
(when (boundp 'byte-compile-unresolved-functions)
(mapc (lambda (fn) (and fn (setq byte-compile-unresolved-functions
(delq (assq fn byte-compile-unresolved-functions)
byte-compile-unresolved-functions))))
(car lyskom-expected-unresolved-functions-temp)))
(setq lyskom-expected-unresolved-functions-temp
(cdr lyskom-expected-unresolved-functions-temp)))))
(defmacro lyskom-end-of-compilation ()
`(progn
(eval-when-compile
(progn
(if (and (boundp 'byte-compile-unresolved-functions)
(consp (car-safe byte-compile-unresolved-functions))
(symbolp (car-safe (car-safe
byte-compile-unresolved-functions))))
(progn
(mapc (lambda (x)
(setq byte-compile-unresolved-functions
(delq
(assq x
byte-compile-unresolved-functions)
byte-compile-unresolved-functions)))
lyskom-expected-unresolved-functions)
))
(if lyskom-compatibility-definitions
(message "Compatibility definitions: %s"
(mapconcat (function (lambda (sym)
(symbol-name sym)))
lyskom-compatibility-definitions
", ")))))))
;;; ============================================================
;;; Keymap handling
;;;
(defmacro lyskom-use-local-map (keymap)
"Use keymap KEYMAP as local map in this buffer. KEYMAP is made local in
the current buffer, and its value is copied from the LysKOM buffer."
` (progn (make-local-variable (quote ,keymap))
(setq ,keymap (lyskom-default-value (quote ,keymap)))
(use-local-map ,keymap)))
(defmacro lyskom-try-define-key (map seq fn)
`(condition-case nil
(define-key ,map ,seq ,fn)
(error nil)))
;;; ============================================================
;;; Widget gunk
;;;
(defmacro lyskom-widget-wrapper (fn file)
`(eval-and-compile
(if (not (fboundp ',fn))
(autoload ',fn ,file))))
(lyskom-widget-wrapper define-widget "widget")
(lyskom-widget-wrapper widget-at "wid-edit")
(lyskom-widget-wrapper widget-value "wid-edit")
(lyskom-widget-wrapper widget-button-click "wid-edit")
(lyskom-widget-wrapper widget-setup "wid-edit")
(lyskom-widget-wrapper widget-value-set "wid-edit")
(lyskom-widget-wrapper widget-insert "wid-edit")
(lyskom-widget-wrapper widget-create "wid-edit")
(lyskom-widget-wrapper widget-get "wid-edit")
(lyskom-widget-wrapper widget-put "wid-edit")
;;; ============================================================
;;; Signal gunk
;;;
(defmacro lyskom-ignore-errors (&rest forms)
` (condition-case nil
(progn ,@forms)
(error nil)))
(put 'ignore-errors 'edebug-form-spec
'(sexp form body))
(defun lyskom-assert-error (&rest args)
(save-excursion
(save-match-data
(if (not (and (boundp 'lyskom-buffer)
(bufferp lyskom-buffer)))
(let ((debug-on-error t))
(apply 'error args))
(set-buffer lyskom-buffer)
(lyskom-save-backtrace)
(apply 'message args)
(lyskom-insert-before-prompt (concat (apply 'format args) "\n"))
(lyskom-insert-before-prompt (format "%s\n" (car (car lyskom-backtrace-list))))
(lyskom-insert-before-prompt (format "%s\n" (elt (car lyskom-backtrace-list) 1)))))))
(eval-and-compile
(if lyskom-debug-compile
(defun lyskom-assert (check &rest args)
(or check (if args (apply 'lyskom-assert-error args)
(lyskom-assert-error "Assertion failed"))))
(defun lyskom-assert (check &rest args) nil)))
(eval-and-compile
(if lyskom-debug-compile
(defmacro lyskom-debug-forms (&rest forms)
`(progn ,@forms))
(defmacro lyskom-debug-forms (&rest forms))))
;;; ============================================================
;;; Local variables
;;;
(defmacro lyskom-setq-default (name value)
` (lyskom-set-default (quote ,name)
,value))
(defmacro lyskom-ref-no ()
`(prog1 lyskom-ref-no
(setq lyskom-ref-no (1+ lyskom-ref-no))
(when (< lyskom-ref-no 0) (setq lyskom-ref-no 1))))
(defsubst lyskom-mime-content-type (ct) (car ct))
(defsubst lyskom-mime-content-type-get (ct param) (cdr (assq param (cdr ct))))
(eval-and-compile (provide 'lyskom-macros))
;;; Local Variables:
;;; eval: (put 'lyskom-traverse 'lisp-indent-hook 2)
;;; eval: (put 'lyskom-save-excursion 'lisp-indent-hook 0)
;;; eval: (put 'lyskom-ignore-errors 'lisp-indent-hook 2)
;;; eval: (put 'lyskom-with-external-functions 'lisp-indent-hook 1)
;;; end:
|
