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;;; (c) copyright 2001,2002 by Tim Moore (moore@bricoworks.com)
;;; This library is free software; you can redistribute it and/or
;;; modify it under the terms of the GNU Library General Public
;;; License as published by the Free Software Foundation; either
;;; version 2 of the License, or (at your option) any later version.
;;;
;;; This library 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
;;; Library General Public License for more details.
;;;
;;; You should have received a copy of the GNU Library General Public
;;; License along with this library; if not, write to the
;;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
;;; Boston, MA 02111-1307 USA.
;;; Definitions for the standard presentation types and generic functions
(in-package :clim-internals)
;;; The presentation type for T is the built-in type T. The correspondence is
;;; established by hand in presentations.lisp.
;(define-presentation-type t ())
;;; auto-activate is described in the Franz user guide; it controls whether an
;;; accepting an expression returns immediately after typing the closing
;;; delimiter -- a la Genera et Mac Lisp -- or if an activation gesture is
;;; required.
;;; preserve-whitespace controls whether the accept method uses read or
;;; read-preserving-whitespace. This is used in our redefinitions of read and
;;; read-preserving-whitespace that accept forms.
(define-presentation-type expression ()
:options (auto-activate (preserve-whitespace t) (subform-read nil))
:inherit-from t)
(define-presentation-type form ()
:options (auto-activate (preserve-whitespace t) (subform-read nil))
:inherit-from `((expression) :auto-activate ,auto-activate
:preserve-whitespace ,preserve-whitespace
:subform-read ,subform-read ))
;;; Actual definitions of presentation methods and types. They've
;;; been separated from the macro and presentation class definitions and
;;; helper functions in order to avoid putting all of presentations.lisp
;;; inside a (eval-when (compile) ...).
(define-presentation-generic-function %presentation-typep presentation-typep
(type-key parameters object type))
(define-default-presentation-method presentation-typep (object type)
(declare (ignore object type))
nil)
(defun presentation-typep (object type)
(with-presentation-type-decoded (name parameters)
type
(when (null parameters)
(let ((clos-class (find-class name nil))) ; Don't error out.
(when (and clos-class (typep clos-class 'standard-class))
(return-from presentation-typep (typep object name)))))
(funcall-presentation-generic-function presentation-typep object type)))
;;; Not defined as a generic function, but what the hell.
(defgeneric presentation-type-of (object))
(defmethod presentation-type-of (object)
(declare (ignore object))
'expression)
(defun get-ptype-from-class-of (object)
(let* ((name (class-name (class-of object)))
(ptype-entry (gethash name *presentation-type-table*)))
(unless ptype-entry
(return-from get-ptype-from-class-of nil))
;; Does the type have required parameters? If so, we can't use it...
(let ((parameter-ll (parameters-lambda-list ptype-entry)))
(values name
(if (eq (car parameter-ll) '&whole)
(cddr parameter-ll)
parameter-ll)))))
(defmethod presentation-type-of ((object standard-object))
(multiple-value-bind (name lambda-list)
(get-ptype-from-class-of object)
(cond ((and name
(or (null lambda-list)
(member (first lambda-list) lambda-list-keywords)))
name)
(name
'standard-object)
(t (let* ((class (class-of object))
(class-name (class-name class)))
(or class-name class))))))
(defmethod presentation-type-of ((object structure-object))
(multiple-value-bind (name lambda-list)
(get-ptype-from-class-of object)
(if (and name
(or (null lambda-list)
(member lambda-list lambda-list-keywords)))
name
(call-next-method))))
(define-presentation-generic-function
%map-over-presentation-type-supertypes
map-over-presentation-type-supertypes
(type-key function type))
;;; Define the method for presentation and clos types
(define-default-presentation-method map-over-presentation-type-supertypes
(function type)
(let ((type-name (presentation-type-name type)))
(map-over-ptype-superclasses
#'(lambda (super)
(let ((super-name (type-name super)))
(funcall function
super-name
(funcall (expansion-function super)
(translate-specifier-for-type type-name
super-name
type)))))
type-name)))
(defun map-over-presentation-type-supertypes (function type)
(funcall-presentation-generic-function map-over-presentation-type-supertypes
function
type))
(define-presentation-generic-function
%presentation-subtypep
presentation-subtypep
(type-key type putative-supertype))
;;; The semantics of the presentation method presentation-subtypep are truly
;;; weird; method combination is in effect disabled. So, the methods have to
;;; be eql methods.
(defmacro define-subtypep-method (&rest args)
(let ((gf (gethash 'presentation-subtypep *presentation-gf-table*)))
(multiple-value-bind (qualifiers lambda-list decls body)
(parse-method-body args)
(let ((type-arg (nth (1- (type-arg-position gf)) lambda-list)))
(unless (consp type-arg)
(error "Type argument in presentation method must be specialized"))
(unless (eq (car type-arg) 'type)
(error "Type argument mismatch with presentation generic function
definition"))
(destructuring-bind (type-var type-name) type-arg
(let ((method-ll `((,(type-key-arg gf)
(eql (prototype-or-error ',type-name)))
,@(copy-list lambda-list))))
(setf (nth (type-arg-position gf) method-ll) type-var)
`(defmethod %presentation-subtypep ,@qualifiers ,method-ll
(declare (ignorable ,(type-key-arg gf))
,@(cdr decls))
(block presentation-subtypep
,@body))))))))
;;; PRESENTATION-SUBTYPEP suffers from some of the same problems as
;;; CL:SUBTYPEP, most (but sadly not all) of which were solved in
;;; H. Baker "A Decision Procedure for SUBTYPEP"; additionally, it
;;; suffers from the behaviour being underspecified, as CLIM
;;; documentation did not have the years of polish that CLtS did.
;;;
;;; So you might wonder why, instead of copying or using directly some
;;; decent Public Domain subtype code (such as that found in SBCL,
;;; implementing CL:SUBTYPEP), there's this slightly wonky
;;; implementation here. Well, some of the answer lies in the fact
;;; that the subtype relationships answered by this predicate are not
;;; in fact analogous to CL's type system. The major use of
;;; PRESENTATION-SUBTYPEP seems to be for determining whether a
;;; presentation is applicable as input to a translator (including the
;;; default translator, transforming an object to itself); actually,
;;; the first step is taken by STUPID-SUBTYPEP, but that I believe is
;;; simply intended to be a short-circuiting conservative version of
;;; PRESENTATION-SUBTYPEP.
;;;
;;; Most presentation types in CLIM are hierarchically arranged by
;;; single-inheritance, and SUBTYPEP relations on the hierarchy are
;;; easy to determine: simply walk up the hierarchy until you find the
;;; putative supertype (in which case the answer is T, T unless the
;;; type's parameters are wrong) or you find the universal supertype
;;; (in which case the answer is NIL, T. There are numerous wrinkles,
;;; however...
;;;
;;; (1) the NIL presentation type is the universal subtype, breaking
;;; the single-inheritance of the hierarchy. This isn't too bad,
;;; because it can be special-cased.
;;;
;;; (2) union types can be constructed, destroying the
;;; single-inheritance hierarchy (when used as a subtype).
;;;
;;; (3) union types can give rise to ambiguity. For example, is the
;;; NUMBER presentation type subtypep (OR REAL COMPLEX)? What
;;; about (INTEGER 3 6) subtypep (OR (INTEGER 3 4) (INTEGER 5 6))?
;;; Is (OR A B) subtypep (OR B A)? The answer to this last
;;; question is not obvious, as the two types have different
;;; ACCEPT behaviour if A and B have any Lisp objects in common,
;;; even if the presentation types are hierarchically unrelated...
;;;
;;; (4) intersection types can be constructed, destroying the
;;; single-inheritance hierarchy (when used as a supertype). This
;;; is partially mitigated by the explicit documentation that the
;;; first type in the AND type's parameters is privileged and
;;; treated specially by ACCEPT.
;;;
;;; Given these difficulties, I'm aiming for roughly expected
;;; behaviour from STUPID- and PRESENTATION-SUBTYPEP, rather than
;;; something which has a comprehensive understanding of presentation
;;; types and the Lisp object universe (as this would be unachievable
;;; anyway: the user can write arbitrary PRESENTATION-TYPEP
;;; functions); PRESENTATION-SUBTYPEP should not be thought of as a
;;; predicate over sets of Lisp objects, but simply a formal predicate
;;; over a graph of names. This gives rise to the implementation
;;; below for OR and AND types, and the hierarchical walk for all
;;; other types. CSR, 2007-01-10
(defun presentation-subtypep (type maybe-supertype)
;; special shortcuts: the universal subtype is privileged (and
;; doesn't in fact fit into a hierarchical lattice); the universal
;; supertype is easy to identify.
(when (or (eql type nil) (eql maybe-supertype t))
(return-from presentation-subtypep (values t t)))
(when (eql type maybe-supertype)
(return-from presentation-subtypep (values t t)))
(with-presentation-type-decoded (super-name super-parameters)
maybe-supertype
(with-presentation-type-decoded (type-name type-parameters)
type
(cond
;; DO NOT BE TEMPTED TO REARRANGE THESE CLAUSES
((eq type-name 'or)
(dolist (or-type type-parameters
(return-from presentation-subtypep (values t t)))
(multiple-value-bind (yesp surep)
(presentation-subtypep or-type maybe-supertype)
(unless yesp
(return-from presentation-subtypep (values yesp surep))))))
((eq super-name 'and)
(let ((result t))
(dolist (and-type super-parameters
(return-from presentation-subtypep (values result result)))
(cond
((and (consp and-type) (eq (car and-type) 'satisfies))
(setq result nil))
((and (consp and-type) (eq (car and-type) 'not))
(multiple-value-bind (yp sp)
(presentation-subtypep type (cadr and-type))
(if yp
(return-from presentation-subtypep (values nil t))
(setq result nil))))
(t (multiple-value-bind (yp sp)
(presentation-subtypep type and-type)
(unless yp
(if sp
(return-from presentation-subtypep (values nil t))
(setq result nil)))))))))
((eq super-name 'or)
(assert (not (eq type-name 'or)))
;; FIXME: this would be the right method were it not for the
;; fact that there can be unions 'in disguise' in the
;; subtype; examples:
;; (PRESENTATION-SUBTYPEP 'NUMBER '(OR REAL COMPLEX))
;; (PRESENTATION-SUBTYPEP '(INTEGER 3 6)
;; '(OR (INTEGER 2 5) (INTEGER 4 7)))
;; Sorry about that.
(let ((surep t))
(dolist (or-type super-parameters
(return-from presentation-subtypep (values nil surep)))
(multiple-value-bind (yp sp)
(presentation-subtypep type or-type)
(cond
(yp (return-from presentation-subtypep (values t t)))
((not sp) (setq surep nil)))))))
((eq type-name 'and)
(assert (not (eq super-name 'and)))
(multiple-value-bind (yp sp)
(presentation-subtypep (car type-parameters) maybe-supertype)
(return-from presentation-subtypep (values yp yp))))))
(map-over-presentation-type-supertypes
#'(lambda (name massaged)
(when (eq name super-name)
(return-from presentation-subtypep
(funcall-presentation-generic-function presentation-subtypep
massaged
maybe-supertype))))
type))
(values nil t))
(define-default-presentation-method presentation-subtypep
(type maybe-supertype)
(with-presentation-type-decoded (name params)
type
(declare (ignore name))
(with-presentation-type-decoded (super-name super-params)
maybe-supertype
(declare (ignore super-name))
(if (equal params super-params)
(values t t)
(values nil nil)))))
(define-presentation-generic-function
%presentation-type-specifier-p
presentation-type-specifier-p
(type-class type))
(define-default-presentation-method presentation-type-specifier-p (type)
t)
(defun presentation-type-specifier-p (object)
"Return true if `object' is a valid presentation type specifier,
otherwise return false."
;; Apparently, this funtion has to handle arbitrary objects.
(let ((name (presentation-type-name object)))
(when (and (typep name '(or symbol class))
(get-ptype-metaclass name))
(funcall-presentation-generic-function presentation-type-specifier-p object))))
(defun default-describe-presentation-type (description stream plural-count)
(if (symbolp description)
(setq description (make-default-description (symbol-name description))))
(cond ((eql 1 plural-count)
(format stream "~:[a~;an~] ~A"
(find (char description 0) "aeiouAEIOU")
description))
((numberp plural-count)
(format stream "~D ~A~P" plural-count description plural-count))
(plural-count
(format stream "~As" description))
(t (write-string description stream))))
(define-presentation-generic-function %describe-presentation-type
describe-presentation-type
(type-key parameters options type stream plural-count ))
;;; Support for the default method on describe-presentation-type: if a CLOS
;;; class has been defined as a presentation type, get description out of the
;;; presentation type.
(defmethod description ((class standard-class))
(let* ((name (class-name class))
(ptype-entry (gethash name *presentation-type-table*)))
(if ptype-entry
(description ptype-entry)
(make-default-description name))))
(define-default-presentation-method describe-presentation-type
(type stream plural-count)
(with-presentation-type-decoded (name parameters options)
type
(declare (ignore name parameters))
(let ((description (or (getf options :description)
(description (class-of type-key)))))
(default-describe-presentation-type description
stream
plural-count))))
(defun describe-presentation-type (type
&optional
(stream *standard-output*)
(plural-count 1))
(flet ((describe-it (stream)
(funcall-presentation-generic-function describe-presentation-type
type
stream
plural-count)))
(if stream
(describe-it stream)
(with-output-to-string (s)
(describe-it s)))))
(define-presentation-generic-function %presentation-default-processor
presentation-default-processor
(type-key parameters default type &key default-type))
(define-default-presentation-method presentation-default-processor
(default type &key (default-type nil default-type-p))
(values default (if default-type-p
default-type
type)))
;;; XXX The spec calls out that the presentation generic function has keyword
;;; arguments acceptably and for-context-type, but the examples I've seen don't
;;; mention them at all in the methods defined for present. So, leave them out
;;; of the generic function lambda list...
(define-presentation-generic-function %present present
(type-key parameters options object type stream view
&key &allow-other-keys))
(defun present (object &optional (type (presentation-type-of object))
&key
(stream *standard-output*)
(view (stream-default-view stream))
modifier
acceptably
(for-context-type type)
single-box
(allow-sensitive-inferiors t)
(sensitive t)
(record-type 'standard-presentation))
(let* ((real-type (expand-presentation-type-abbreviation type))
(context-type (if (eq for-context-type type)
real-type
(expand-presentation-type-abbreviation
for-context-type))))
(stream-present stream object real-type
:view view :modifier modifier :acceptably acceptably
:for-context-type context-type :single-box single-box
:allow-sensitive-inferiors allow-sensitive-inferiors
:sensitive sensitive
:record-type record-type)))
(defgeneric stream-present (stream object type
&key view modifier acceptably for-context-type
single-box allow-sensitive-inferiors sensitive
record-type))
(defmethod stream-present ((stream output-recording-stream) object type
&key
(view (stream-default-view stream))
modifier
acceptably
(for-context-type type)
single-box
(allow-sensitive-inferiors t)
(sensitive t)
(record-type 'standard-presentation))
;; *allow-sensitive-inferiors* controls whether or not
;; with-output-as-presentation will emit a presentation
(let ((*allow-sensitive-inferiors* (and *allow-sensitive-inferiors*
sensitive)))
(with-output-as-presentation (stream object type
:view view
:modifier modifier
:single-box single-box
:allow-sensitive-inferiors
allow-sensitive-inferiors
:record-type record-type)
(funcall-presentation-generic-function
present object type stream view
:acceptably acceptably :for-context-type for-context-type))))
;;; Should work well enough on non-CLIM streams...
(defmethod stream-present (stream object type
&key
(view +textual-view+)
modifier
acceptably
(for-context-type type)
single-box
(allow-sensitive-inferiors t)
(sensitive t)
(record-type 'standard-presentation))
(declare (ignore modifier single-box allow-sensitive-inferiors sensitive
record-type))
(funcall-presentation-generic-function
present object type stream view
:acceptably acceptably :for-context-type for-context-type)
nil)
(defun present-to-string (object &optional (type (presentation-type-of object))
&key (view +textual-view+)
acceptably
(for-context-type type)
(string nil stringp)
(index 0 indexp))
(let* ((real-type (expand-presentation-type-abbreviation type))
(context-type (if (eq for-context-type type)
real-type
(expand-presentation-type-abbreviation
for-context-type))))
(when (and stringp indexp)
(setf (fill-pointer string) index))
(flet ((do-present (s)
(stream-present s object real-type
:view view :acceptably acceptably
:for-context-type context-type)))
(declare (dynamic-extent #'do-present))
(let ((result (if stringp
(with-output-to-string (stream string)
(do-present stream))
(with-output-to-string (stream)
(do-present stream)))))
(if stringp
(values string (fill-pointer string))
result)))))
;;; I believe this obsolete... --moore
(defmethod presentation-replace-input
((stream input-editing-stream) object type view
&key (buffer-start nil buffer-start-supplied-p)
(rescan nil rescan-supplied-p)
query-identifier
(for-context-type type))
(declare (ignore query-identifier))
(let ((result (present-to-string object type
:view view :acceptably nil
:for-context-type for-context-type)))
(apply #'replace-input stream result `(,@(and buffer-start-supplied-p
`(:buffer-start
,buffer-start))
,@(and rescan-supplied-p
`(:rescan ,rescan))))))
;;; Presentation histories.
;;; This allocates a hash table even if the frame doesn't support
;;; histories! I'm over it already. -- moore
(defclass presentation-history-mixin ()
((presentation-history :accessor frame-presentation-history
:initform (make-hash-table :test #'eq)))
(:documentation "Mixin class for frames that implements presentation
type histories"))
(define-presentation-generic-function %presentation-type-history
presentation-type-history
(type-key parameters type))
;;; This function should exist for convenience even if not mentioned in the
;;; spec.
(defun presentation-type-history (type)
(funcall-presentation-generic-function presentation-type-history type))
(defclass presentation-history ()
((stack :accessor presentation-history-array
:initform (make-array 1 :fill-pointer 0
:adjustable t)
:documentation "The history, with the newest objects at
the end of the array. Should contain conses with the car being
the object and the cdr being the type.")
(pointer :accessor presentation-history-pointer
:initform nil
:documentation "The index of the \"current\" object,
used when navigating the history. If NIL, means that no
navigation has yet been performed."))
(:documentation "Class for objects that contain the history for
a specific type."))
(define-default-presentation-method presentation-type-history (type)
(if (and *application-frame*
(frame-maintain-presentation-histories *application-frame*))
(with-presentation-type-decoded (name)
type
(let* ((ptype (get-ptype-metaclass name))
(history (history ptype)))
(case history
((t)
(let* ((history-table (frame-presentation-history
*application-frame*))
(history-object (gethash name history-table)))
(unless history-object
(setf history-object
(make-instance 'presentation-history)
(gethash name history-table)
history-object))
history-object))
(nil
nil)
(otherwise
(funcall-presentation-generic-function presentation-type-history
type)))))))
;;; Not in the spec, but I think this is necessary (or at any rate, the easiest
;;; way) to control whether or not to use histories in a given context.
(define-presentation-generic-function %presentation-type-history-for-stream
presentation-type-history-for-stream
(type-key parameters type stream)
(:documentation "Returns a type history or nil for a presentation TYPE and
STREAM. This is used by McCLIM to decide whether or not to use histories in a
given situation. A primary method specialized on just the type should
call-next-method to get the \"real\" answer based on the stream type."))
(define-default-presentation-method presentation-type-history-for-stream
(type stream)
(declare (ignore stream))
nil)
;;; method for clim-stream-pane in panes.lisp
(define-presentation-method presentation-type-history-for-stream
((type t) (stream input-editing-stream))
;; What is the purpose of this? Makes stuff harder to do, so
;; commented out...
;;(if (not (stream-rescanning-p stream))
;; (funcall-presentation-generic-function presentation-type-history type)
;; nil)
(funcall-presentation-generic-function presentation-type-history type))
(defun presentation-history-insert (history object ptype)
"Unconditionally insert `object' as an input of presentation
type `type' at the top of the presentation history `history', as
the most recently added object."
(vector-push-extend (cons object ptype)
(presentation-history-array history)))
(defun presentation-history-top (history ptype)
"Find the topmost (most recently added object) of `history'
that is of the presentation type `ptype' or a subtype. Two values
will be returned, the object and the presentation type of the
object. If no applicable object can be found, these values will
both be NIL."
(loop
with array = (presentation-history-array history)
for index from (1- (fill-pointer array)) downto 0
for (object . object-ptype) = (aref array index)
do
(when (presentation-subtypep object-ptype ptype)
(return (aref array index)))
finally (return (values nil nil))))
(defun presentation-history-reset-pointer (history)
"Set the pointer to point at the object most recently added
object."
(setf (presentation-history-pointer history) nil))
(defun presentation-history-next (history ptype)
"Go to the next input (forward in time) in `history' that is a
presentation-subtype of `ptype', respective to the pointer in
`history'. Returns two values: the found object and its
presentation type, both of which will be NIL if no applicable
object can be found."
(with-accessors ((pointer presentation-history-pointer)
(array presentation-history-array)) history
;; If no navigation has been performed, we have no object to go
;; forwards to.
(if (or (null pointer) (>= (1+ pointer) (length array)))
(values nil nil)
(progn
(incf pointer)
(destructuring-bind (object . object-ptype)
(aref array pointer)
(if object-ptype
(if (presentation-subtypep object-ptype ptype)
(values object object-ptype)
(presentation-history-next history ptype))
(values nil nil)))))))
(defun presentation-history-previous (history ptype)
"Go to the previous input (backward in time) in `history' that
is a presentation-subtype of `ptype', respective to the pointer
in `history'. Returns two values: the found object and its
presentation type, both of which will be NIL if no applicable
object can be found."
(with-accessors ((pointer presentation-history-pointer)
(array presentation-history-array)) history
(if (and (numberp pointer) (zerop pointer))
(values nil nil)
(progn
(cond ((and (numberp pointer) (plusp pointer))
(decf pointer))
((plusp (length array))
(setf pointer (1- (fill-pointer array)))))
(if (and (numberp pointer) (array-in-bounds-p array pointer))
(destructuring-bind (object . object-ptype)
(aref array pointer)
(if object-ptype
(if (presentation-subtypep object-ptype ptype)
(values object object-ptype)
(progn (presentation-history-previous history ptype)))
(values nil nil)))
(values nil nil))))))
(defmacro with-object-on-history ((history object ptype) &body body)
"Evaluate `body' with `object' as `ptype' as the head (most
recently added object) on `history', and remove it again after
`body' has run. If `body' as `ptype' is already the head, the
history will be unchanged."
(with-gensyms (added)
`(let ((,added (presentation-history-add ,history ,object ,ptype)))
(unwind-protect (progn ,@body)
(when ,added
(decf (fill-pointer (presentation-history-array ,history))))))))
(defun presentation-history-add (history object ptype)
"Add OBJECT and PTYPE to the HISTORY unless they are already at the head of
HISTORY"
(multiple-value-bind (top-object top-ptype)
(presentation-history-top history ptype)
(unless (and top-ptype (eql object top-object) (equal ptype top-ptype))
(presentation-history-insert history object ptype))))
(define-presentation-generic-function %accept accept
(type-key parameters options type stream view &key))
(defvar *recursive-accept-p* nil)
(defvar *recursive-accept-1-p* nil)
(defvar *active-history-type* nil)
;;; The spec says "default-type most be a presentation type specifier", but the
;;; examples we have imply that default-type is optional, so we'll be liberal
;;; in what we accept.
(defun accept (type &rest rest-args &key
(stream *standard-input*)
(view nil viewp)
(default nil defaultp)
(default-type nil default-type-p)
provide-default insert-default replace-input
(history nil historyp) ; true default supplied below
active-p ; Don't think this will be used
prompt prompt-mode display-default
query-identifier
activation-gestures additional-activation-gestures
delimiter-gestures additional-delimiter-gestures)
(declare (ignore insert-default replace-input active-p prompt prompt-mode
display-default query-identifier
activation-gestures additional-activation-gestures
delimiter-gestures additional-delimiter-gestures))
(handler-bind ((abort-gesture (lambda (condition)
(signal condition) ;; to give outer handlers a chance to say "I know how to handle this"
(abort condition))))
(let* ((real-type (expand-presentation-type-abbreviation type))
(real-default-type (cond (default-type-p
(expand-presentation-type-abbreviation
default-type))
((or defaultp provide-default)
real-type)
(t nil)))
(real-history-type (cond ((null historyp) real-type)
((null history) nil)
(t (expand-presentation-type-abbreviation
history))))
(*recursive-accept-p* *recursive-accept-1-p*)
(*recursive-accept-1-p* t))
(with-keywords-removed (rest-args (:stream))
(when (or default-type-p defaultp)
(setf rest-args
(list* :default-type real-default-type rest-args)))
(when historyp
(setf rest-args (list* :history real-history-type rest-args)))
(cond ((and viewp (symbolp view))
(setf rest-args
(list* :view (funcall #'make-instance view) rest-args)))
((consp view)
(setf rest-args
(list* :view (apply #'make-instance view) rest-args))))
;; Presentation type history interaction. According to the spec,
;; if provide-default is true, we take the default from the
;; presentation history. In addition, we'll implement the Genera
;; behavior of temporarily putting the default on the history
;; stack so the user can conveniently suck it in.
(labels ((get-history ()
(when real-history-type
(funcall-presentation-generic-function
presentation-type-history-for-stream
real-history-type stream)))
(do-accept (args)
(apply #'stream-accept stream real-type args)))
(let* ((default-from-history (and (not defaultp) provide-default))
(history (get-history))
(results
(multiple-value-list
(if history
(unwind-protect
(let ((*active-history-type* real-history-type))
(cond (defaultp
(with-object-on-history
(history default real-default-type)
(do-accept rest-args)))
(default-from-history
(multiple-value-bind
(history-default history-type)
(presentation-history-top history
real-default-type)
(do-accept (if history-type
(list* :default history-default
:default-type history-type
rest-args)
rest-args))))
(t (do-accept rest-args))))
(unless *recursive-accept-p*
(presentation-history-reset-pointer (get-history))))
(do-accept rest-args))))
(results-history (get-history)))
(when results-history
(presentation-history-add results-history
(car results)
real-type))
(values-list results)))))))
(defmethod stream-accept ((stream standard-extended-input-stream) type
&rest args
&key (view (stream-default-view stream))
&allow-other-keys)
(apply #'prompt-for-accept stream type view args)
(apply #'accept-1 stream type args))
(defmethod stream-accept ((stream #.*string-input-stream-class*) type
&key (view (stream-default-view stream))
(default nil defaultp)
(default-type nil default-type-p)
(activation-gestures nil activationsp)
(additional-activation-gestures
nil additional-activations-p)
(delimiter-gestures nil delimitersp)
(additional-delimiter-gestures
nil additional-delimiters-p)
&allow-other-keys)
(with-activation-gestures ((if additional-activations-p
additional-activation-gestures
activation-gestures)
:override activationsp)
(with-delimiter-gestures ((if additional-delimiters-p
additional-delimiter-gestures
delimiter-gestures)
:override delimitersp)
(multiple-value-bind (object object-type)
(apply-presentation-generic-function
accept
type stream view
`(,@(and defaultp `(:default ,default))
,@(and default-type-p `(:default-type ,default-type))))
(values object (or object-type type))))))
(defun accept-1 (stream type &key
(view (stream-default-view stream))
(default nil defaultp)
(default-type nil default-type-p)
provide-default
insert-default
(replace-input t)
history
active-p
prompt
prompt-mode
display-default
query-identifier
(activation-gestures nil activationsp)
(additional-activation-gestures nil additional-activations-p)
(delimiter-gestures nil delimitersp)
(additional-delimiter-gestures nil additional-delimiters-p))
(declare (ignore provide-default history active-p
prompt prompt-mode
display-default query-identifier))
(when (and defaultp (not default-type-p))
(error ":default specified without :default-type"))
(when (and activationsp additional-activations-p)
(error "only one of :activation-gestures or ~
:additional-activation-gestures may be passed to accept."))
(unless (or activationsp additional-activations-p *activation-gestures*)
(setq activation-gestures *standard-activation-gestures*))
(let ((sensitizer-object nil)
(sensitizer-type nil))
(with-input-editing
(stream
:input-sensitizer #'(lambda (stream cont)
(with-output-as-presentation
(stream sensitizer-object sensitizer-type)
(declare (ignore stream))
(funcall cont))))
(with-input-position (stream) ; support for calls to replace-input
(when (and insert-default
(not (stream-rescanning-p stream)))
;; Insert the default value to the input stream. It should
;; become fully keyboard-editable. We do not want to insert
;; the default if we're rescanning, only during initial
;; setup.
(presentation-replace-input stream default default-type view))
(setf (values sensitizer-object sensitizer-type)
(with-input-context (type)
(object object-type event options)
(with-activation-gestures ((if additional-activations-p
additional-activation-gestures
activation-gestures)
:override activationsp)
(with-delimiter-gestures ((if additional-delimiters-p
additional-delimiter-gestures
delimiter-gestures)
:override delimitersp)
(let ((accept-results nil))
(handle-empty-input (stream)
(setq accept-results
(multiple-value-list
(if defaultp
(funcall-presentation-generic-function
accept type stream view
:default default
:default-type default-type)
(funcall-presentation-generic-function
accept type stream view))))
;; User entered activation or delimiter
;; gesture without any input.
(if defaultp
(progn
(presentation-replace-input
stream default default-type view :rescan nil))
(simple-parse-error
"Empty input for type ~S with no supplied default"
type))
(setq accept-results (list default default-type)))
;; Eat trailing activation gesture
;; XXX what about pointer gestures?
;; XXX and delimiter gestures?
(unless *recursive-accept-p*
(let ((ag (read-char-no-hang stream nil stream t)))
(unless (or (null ag) (eq ag stream))
(unless (activation-gesture-p ag)
(unread-char ag stream)))))
(values (car accept-results) (if (cdr accept-results)
(cadr accept-results)
type)))))
;; A presentation was clicked on, or something
(t
(when (and replace-input
(getf options :echo t)
(not (stream-rescanning-p stream)))
(presentation-replace-input stream object object-type view
:rescan nil))
(values object object-type))))
;; Just to make it clear that we're returning values
(values sensitizer-object sensitizer-type)))))
(defmethod prompt-for-accept ((stream t)
type view
&rest accept-args
&key &allow-other-keys)
(declare (ignore view))
(apply #'prompt-for-accept-1 stream type accept-args))
(defun prompt-for-accept-1 (stream type
&key
(default nil defaultp)
(default-type type)
(insert-default nil)
(prompt t)
(prompt-mode :normal)
(display-default prompt)
&allow-other-keys)
(flet ((display-using-mode (stream prompt default)
(ecase prompt-mode
(:normal
(if *recursive-accept-p*
(input-editor-format stream "(~A~@[[~A]~]) " prompt default)
(input-editor-format stream "~A~@[[~A]~]: " prompt default)))
(:raw
(input-editor-format stream "~A" prompt)))))
(let ((prompt-string (if (eq prompt t)
(format nil "~:[Enter ~;~]~A"
*recursive-accept-p*
(describe-presentation-type type nil nil))
prompt))
;; Don't display the default in the prompt if it is to be
;; inserted into the input stream.
(default-string (and defaultp
(not insert-default)
display-default
(present-to-string default default-type))))
(cond ((null prompt)
nil)
(t
(display-using-mode stream prompt-string default-string))))))
(defmethod prompt-for-accept ((stream #.*string-input-stream-class*)
type view
&rest other-args
&key &allow-other-keys)
(declare (ignore type view other-args))
nil)
;;; For ACCEPT-FROM-STRING, use this barebones input-editing-stream.
(defclass string-input-editing-stream (input-editing-stream fundamental-character-input-stream)
((input-buffer :accessor stream-input-buffer)
(insertion-pointer :accessor stream-insertion-pointer
:initform 0
:documentation "This is not used for anything at any point.")
(scan-pointer :accessor stream-scan-pointer
:initform 0
:documentation "This is not used for anything at any point."))
(:documentation "An implementation of the input-editing stream
protocol retrieving gestures from a provided string."))
(defmethod initialize-instance :after ((stream string-input-editing-stream)
&key (string (error "A string must be provided"))
(start 0) (end (length string))
&allow-other-keys)
(setf (stream-input-buffer stream)
(replace (make-array (- end start) :fill-pointer (- end start))
string :start2 start :end2 end)))
(defmethod stream-element-type ((stream string-input-editing-stream))
'character)
(defmethod close ((stream string-input-editing-stream) &key abort)
(declare (ignore abort)))
(defmethod stream-peek-char ((stream string-input-editing-stream))
(or (stream-read-gesture stream :peek-p t)
:eof))
(defmethod stream-read-char-no-hang ((stream string-input-editing-stream))
(if (> (stream-scan-pointer stream) (length (stream-input-buffer stream)))
:eof
(stream-read-gesture stream)))
(defmethod stream-read-char ((stream string-input-editing-stream))
(stream-read-gesture stream))
(defmethod stream-listen ((stream string-input-editing-stream))
(< (stream-scan-pointer stream) (length (stream-input-buffer stream))))
(defmethod stream-unread-char ((stream string-input-editing-stream) char)
(stream-unread-gesture stream char))
(defmethod invoke-with-input-editor-typeout ((stream string-input-editing-stream) continuation
&key erase)
(declare (ignore erase)))
(defmethod input-editor-format ((stream string-input-editing-stream) format-string
&rest args)
(declare (ignore args)))
(defmethod stream-rescanning-p ((stream string-input-editing-stream))
t)
(defmethod reset-scan-pointer ((stream string-input-editing-stream)
&optional scan-pointer)
(declare (ignore scan-pointer)))
(defmethod immediate-rescan ((stream string-input-editing-stream)))
(defmethod queue-rescan ((stream string-input-editing-stream)))
(defmethod rescan-if-necessary ((stream string-input-editing-stream)
&optional inhibit-activation)
(declare (ignore inhibit-activation)))
(defmethod erase-input-buffer ((stream string-input-editing-stream)
&optional start-position)
(declare (ignore start-position)))
(defmethod redraw-input-buffer ((stream string-input-editing-stream)
&optional start-position)
(declare (ignore start-position)))
(defmethod stream-process-gesture ((stream string-input-editing-stream) gesture type)
(when (characterp gesture)
(values gesture type)))
(defmethod stream-read-gesture ((stream string-input-editing-stream)
&key peek-p &allow-other-keys)
(unless (> (stream-scan-pointer stream) (length (stream-input-buffer stream)))
(prog1 (if (= (stream-scan-pointer stream) (length (stream-input-buffer stream)))
(second (first (gethash (first *activation-gestures*)
climi::*gesture-names*))) ; XXX - will always be non-NIL?
(aref (stream-input-buffer stream) (stream-scan-pointer stream)))
(unless peek-p
(incf (stream-scan-pointer stream))))))
(defmethod stream-unread-gesture ((stream string-input-editing-stream) gesture)
(decf (stream-scan-pointer stream)))
(defmethod stream-accept ((stream string-input-editing-stream) type &rest args)
(apply #'accept-1 stream type args))
;;; XXX This needs work! It needs to do everything that accept does for
;;; expanding ptypes and setting up recursive call procesusing
(defun accept-from-string (type string
&rest args
&key view
(default nil defaultp)
(default-type nil default-type-p)
(activation-gestures nil activationsp)
(additional-activation-gestures
nil
additional-activations-p)
(delimiter-gestures nil delimitersp)
(additional-delimiter-gestures
nil
additional-delimiters-p)
(start 0)
(end (length string)))
(declare (ignore view))
;; XXX work in progress here.
(with-activation-gestures ((if additional-activations-p
additional-activation-gestures
activation-gestures)
:override activationsp)
(with-delimiter-gestures ((if additional-delimiters-p
additional-delimiter-gestures
delimiter-gestures)
:override delimitersp)))
(when (zerop (- end start))
(if defaultp
(return-from accept-from-string (values default
(if default-type-p
default-type
type)
0))
(simple-parse-error "Empty string")))
(let ((stream (make-instance 'string-input-editing-stream
:string string :start start :end end)))
(multiple-value-bind (val ptype)
(with-keywords-removed (args (:start :end))
(apply #'stream-accept stream type :history nil :view +textual-view+ args))
(values val ptype (+ (stream-scan-pointer stream) start)))))
(define-presentation-generic-function %presentation-refined-position-test
presentation-refined-position-test
(type-key parameters options type record x y))
(define-default-presentation-method presentation-refined-position-test
(type record x y)
(declare (ignore type))
;;; output-record-hit-detection-rectangle* has already been called
(let ((single-box (presentation-single-box record)))
(if (or (eq single-box t) (eq single-box :position))
t
(labels ((tester (record)
(typecase record
(displayed-output-record
(return-from presentation-refined-position-test t))
(compound-output-record
(map-over-output-records-containing-position
#'tester record x y))
(t nil))))
(tester record)
nil))))
(defun presentation-contains-position (record x y)
(let ((single-box (presentation-single-box record)))
(multiple-value-bind (min-x min-y max-x max-y)
(output-record-hit-detection-rectangle* record)
(if (and (<= min-x x max-x) (<= min-y y max-y))
(if (or (null single-box) (eq single-box :highlighting))
(funcall-presentation-generic-function
presentation-refined-position-test
(presentation-type record) record x y)
t)
nil))))
(define-presentation-generic-function %highlight-presentation
highlight-presentation
(type-key parameters options type record stream state))
;;; Internal function to highlight just one presentation
(defun highlight-presentation-1 (presentation stream state)
(with-output-recording-options (stream :record nil)
(funcall-presentation-generic-function highlight-presentation
(presentation-type presentation)
presentation
stream
state)))
(defgeneric highlight-output-record-tree (record stream state))
(defmethod highlight-output-record-tree (record stream state)
(declare (ignore record stream state))
(values))
(defmethod highlight-output-record-tree ((record compound-output-record) stream state)
(map-over-output-records
(lambda (record)
(highlight-output-record-tree record stream state))
record))
(defmethod highlight-output-record-tree ((record displayed-output-record) stream state)
(highlight-output-record record stream state))
(define-default-presentation-method highlight-presentation
(type record stream state)
(declare (ignore type))
(if (or (eq (presentation-single-box record) t)
(eq (presentation-single-box record) :highlighting))
(highlight-output-record record stream state)
(highlight-output-record-tree record stream state)))
(define-default-presentation-method present
(object type stream (view textual-view) &key acceptably for-context-type)
(declare (ignore for-context-type type))
(if acceptably
(let ((*print-readably* t))
(prin1 object stream))
(princ object stream)))
(defun accept-using-read (stream ptype &key ((:read-eval *read-eval*) nil))
(let* ((token (read-token stream)))
(let ((result (handler-case (read-from-string token)
(error (c)
(declare (ignore c))
(simple-parse-error "Error parsing ~S for presentation type ~S"
token
ptype)))))
(if (presentation-typep result ptype)
(values result ptype)
(input-not-of-required-type result ptype)))))
(defun accept-using-completion (type stream func
&rest complete-with-input-key-args)
"A wrapper around complete-with-input that returns the presentation type with
the completed object."
(multiple-value-bind (object success input)
(apply #'complete-input stream func complete-with-input-key-args)
(if success
(values object type)
(simple-parse-error "Error parsing ~S for presentation type ~S"
input
type))))
;;; When no accept method has been defined for a type, allow some kind of
;;; input. The accept can be satisfied with pointer input, of course, and this
;;; allows the clever user a way to input the type at the keyboard, using #. or
;;; some other printed representation.
;;;
;;; XXX Once we "go live" we probably want to disable this, probably with a
;;; beep and warning that input must be clicked on.
(define-default-presentation-method accept
(type stream (view textual-view) &key default default-type)
(declare (ignore default default-type))
(accept-using-read stream type :read-eval t))
;;; The presentation types
(define-presentation-method presentation-typep (object (type t))
(declare (ignore object))
t)
(define-presentation-method present (object (type t)
stream
(view textual-view)
&key acceptably for-context-type)
(declare (ignore for-context-type))
(let ((*print-readably* acceptably))
(if acceptably
(prin1 object stream)
(princ object stream))))
(define-presentation-type nil ())
(define-presentation-method presentation-typep (object (type nil))
(declare (ignore object))
nil)
(define-presentation-type null ()
:inherit-from t)
(define-presentation-method presentation-typep (object (type null))
(eq object nil))
(define-presentation-method present (object (type null)
stream
(view textual-view)
&key acceptably for-context-type)
(declare (ignore object acceptably for-context-type))
(write-string "None" stream))
(define-presentation-method accept ((type null) stream (view textual-view)
&key)
(values (completing-from-suggestions (stream)
(suggest "None" nil)
(suggest "" nil))))
(define-presentation-type boolean ()
:inherit-from t)
(define-presentation-method presentation-typep (object (type boolean))
(or (eq object t) (eq object nil)))
(define-presentation-method present (object (type boolean) stream
(view textual-view)
&key acceptably for-context-type)
(declare (ignore acceptably for-context-type))
(if object
(write-string "Yes" stream)
(write-string "No" stream)))
(define-presentation-method accept ((type boolean) stream (view textual-view)
&key)
(accept-using-completion 'boolean
stream
#'(lambda (input-string mode)
(complete-from-possibilities
input-string
'(("yes" t) ("no" nil))
nil
:action mode))))
(define-presentation-type symbol ()
:inherit-from 't)
(define-presentation-method presentation-typep (object (type symbol))
(symbolp object))
(define-presentation-method present (object (type symbol) stream
(view textual-view)
&key acceptably for-context-type)
(declare (ignore for-context-type))
(if acceptably
(prin1 object stream)
(princ object stream)))
(define-presentation-method accept ((type symbol) stream (view textual-view)
&key)
(accept-using-read stream type))
(define-presentation-type keyword () :inherit-from 'symbol)
(define-presentation-method presentation-typep (object (type keyword))
(keywordp object))
(define-presentation-method present (object (type keyword) stream
(view textual-view)
&key acceptably for-context-type)
(declare (ignore acceptably for-context-type))
(prin1 object stream))
(defmethod presentation-type-of ((object symbol))
(if (eq (symbol-package object) (find-package :keyword))
'keyword
'symbol))
(define-presentation-type blank-area ()
:inherit-from t)
(define-presentation-method highlight-presentation ((type blank-area)
record
stream
state)
(declare (ignore record stream state))
nil)
;;; Do other slots of this have to be bound in order for this to be useful?
;;; Guess we'll see.
(defparameter *null-presentation* (make-instance 'standard-presentation
:object nil
:type 'blank-area
:view +textual-view+))
(define-presentation-type number ()
:inherit-from 't)
(define-presentation-method presentation-typep (object (type number))
(numberp object))
(defmethod presentation-type-of ((object number))
'number)
(define-presentation-type complex (&optional (type 'real))
:inherit-from 'number)
(define-presentation-method presentation-typep (object (type complex))
(and (complexp object)
(typep (realpart object) type)
(typep (imagpart object) type)))
(define-presentation-method presentation-subtypep ((type complex)
maybe-supertype)
(with-presentation-type-parameters (complex type)
(let ((component-type type)) ;i.e., the parameter named "type"
(with-presentation-type-parameters (complex maybe-supertype)
(let ((super-component-type type))
(presentation-subtypep component-type super-component-type))))))
(defmethod presentation-type-of ((object complex))
'complex)
(define-presentation-method present (object (type complex) stream
(view textual-view)
&key acceptably for-context-type)
(declare (ignore acceptably for-context-type))
(present (realpart object) (presentation-type-of (realpart object))
:stream stream :view view :sensitive nil)
(write-char #\Space stream)
(present (imagpart object) (presentation-type-of (imagpart object))
:stream stream :view view :sensitive nil))
(define-presentation-type real (&optional low high) :options ((base 10) radix)
:inherit-from 'number)
(define-presentation-method presentation-typep (object (type real))
(and (realp object)
(or (eq low '*)
(<= low object))
(or (eq high '*)
(<= object high))))
(defmethod presentation-type-of ((object real))
'real)
(define-presentation-method present (object (type real) stream
(view textual-view)
&key acceptably for-context-type)
(declare (ignore acceptably for-context-type))
(let ((*print-base* base)
(*print-radix* radix))
(princ object stream)))
(define-presentation-method accept ((type real) stream (view textual-view)
&key)
(let ((*read-base* base))
(accept-using-read stream type)))
;;; Define a method that will do the comparision for all real types. It's
;;; already determined that that the numeric class of type is a subtype of
;;;supertype.
(defun number-subtypep (low high super-low super-high)
(if (eq low '*)
(unless (eq super-low '*)
(return-from number-subtypep nil))
(unless (or (eq super-low '*) (>= low super-low))
(return-from number-subtypep nil)))
(if (eq high '*)
(unless (eq super-high '*)
(return-from number-subtypep nil))
(unless (or (eq super-high '*) (<= high super-high))
(return-from number-subtypep nil)))
t)
(define-presentation-type rational (&optional low high)
:options ((base 10) radix)
:inherit-from `((real ,low ,high) :base ,base :radix ,radix))
(define-presentation-method presentation-typep (object (type rational))
(and (rationalp object)
(or (eq low '*)
(<= low object))
(or (eq high '*)
(<= object high))))
(defmethod presentation-type-of ((object rational))
'rational)
(define-presentation-method present (object (type rational) stream
(view textual-view)
&key acceptably for-context-type)
(declare (ignore acceptably for-context-type))
(let ((*print-base* base)
(*print-radix* radix))
(princ object stream)))
(define-presentation-type integer (&optional low high)
:options ((base 10) radix)
:inherit-from `((rational ,low ,high) :base ,base :radix ,radix))
(define-presentation-method presentation-typep (object (type integer))
(and (integerp object)
(or (eq low '*)
(<= low object))
(or (eq high '*)
(<= object high))))
(defmethod presentation-type-of ((object integer))
'integer)
(define-presentation-method present (object (type integer) stream
(view textual-view)
&key acceptably for-context-type)
(declare (ignore acceptably for-context-type))
(let ((*print-base* base)
(*print-radix* radix))
(princ object stream)))
(define-presentation-type ratio (&optional low high)
:options ((base 10) radix)
:inherit-from `((rational ,low ,high) :base ,base :radix ,radix))
(define-presentation-method presentation-typep (object (type ratio))
(and (not (integerp object))
(rationalp object)
(or (eq low '*)
(<= low object))
(or (eq high '*)
(<= object high))))
(defmethod presentation-type-of ((object ratio))
'ratio)
(define-presentation-method present (object (type ratio) stream
(view textual-view)
&key acceptably for-context-type)
(declare (ignore acceptably for-context-type))
(let ((*print-base* base)
(*print-radix* radix))
(princ object stream)))
(define-presentation-type float (&optional low high)
:options ((base 10) radix)
:inherit-from `((real ,low ,high) :base ,base :radix ,radix))
(define-presentation-method presentation-typep (object (type float))
(and (floatp object)
(or (eq low '*)
(<= low object))
(or (eq high '*)
(<= object high))))
(defmethod presentation-type-of ((object float))
'float)
(define-presentation-method present (object (type float) stream
(view textual-view)
&key acceptably for-context-type)
(declare (ignore acceptably for-context-type))
(let ((*print-base* base)
(*print-radix* radix))
(princ object stream)))
(macrolet ((frob (num-type)
`(define-presentation-method presentation-subtypep ((type
,num-type)
maybe-supertype)
(with-presentation-type-parameters (,num-type maybe-supertype)
(let ((super-low low)
(super-high high))
(with-presentation-type-parameters (,num-type type)
(values (number-subtypep low high super-low super-high)
t)))))))
(frob real)
(frob rational)
(frob ratio)
(frob float))
(define-presentation-type character ()
:inherit-from 't)
(define-presentation-method presentation-typep (object (type character))
(characterp object))
(defmethod presentation-type-of ((object character))
'character)
(define-presentation-method present (object (type character) stream
(view textual-view)
&key acceptably for-context-type)
(declare (ignore acceptably for-context-type))
(princ object stream))
(define-presentation-type string (&optional length)
:inherit-from 't)
(define-presentation-method presentation-typep (object (type string))
(and (stringp object)
(or (eq length '*) (eql (length object) length))))
(define-presentation-method presentation-subtypep ((type string)
maybe-supertype)
(with-presentation-type-parameters (string maybe-supertype)
(let ((super-length length))
(with-presentation-type-parameters (string type)
(values (or (eq super-length '*)
(eql length super-length))
t)))))
;;; `(string ,length) would be more specific, but is not "likely to be useful
;;; to the programmer."
(defmethod presentation-type-of ((object string))
'string)
(define-presentation-method present (object (type string) stream
(view textual-view)
&key acceptably for-context-type)
(declare (ignore for-context-type))
(if acceptably
(prin1 object stream)
(princ object stream)))
(define-presentation-method accept ((type string) stream (view textual-view)
&key (default nil defaultp)
(default-type type))
(let ((result (read-token stream)))
(cond ((numberp length)
(if (eql length (length result))
(values result type)
(input-not-of-required-type result type)))
((and (zerop (length result)) defaultp)
(values default default-type))
(t (values result type)))))
(define-presentation-type pathname ()
:options ((default-version :newest) default-type (merge-default t))
:inherit-from 't)
(define-presentation-method presentation-typep (object (type pathname))
(pathnamep object))
(define-presentation-method present ((object pathname) (type pathname)
stream (view textual-view) &key)
;; XXX: We can only visually represent the pathname if it has a name
;; - making it wild is a compromise. If the pathname is completely
;; blank, we leave it as-is, though.
;; The above comment was meant to indicate that if the pathname had
;; neither a name NOR a directory, then it couldn't be visually
;; represented. Some discussion has ensued on the possbility of
;; emitting something like "A pathname of type <foo>"
;; [2007/01/08:rpg]
(let ((pathname (if (equal object #.(make-pathname))
object
(merge-pathnames object (make-pathname :name :wild)))))
(princ object stream))
)
(define-presentation-method present ((object string) (type pathname)
stream (view textual-view)
&rest args &key)
(apply-presentation-generic-function
present (pathname object) type stream view args))
(defmethod presentation-type-of ((object pathname))
'pathname)
(defun filename-completer (so-far mode)
(let* ((directory-prefix
(if (and (plusp (length so-far)) (eql (aref so-far 0) #\/))
""
(namestring #+sbcl *default-pathname-defaults*
#+cmu (ext:default-directory)
#-(or sbcl cmu) *default-pathname-defaults*)))
(full-so-far (concatenate 'string directory-prefix so-far))
(pathnames
(loop with length = (length full-so-far)
and wildcard = (format nil "~A*.*"
(loop for start = 0 ; Replace * -> \*
for occurence = (position #\* so-far :start start)
until (= start (length so-far))
until (null occurence)
do (replace so-far "\\*" :start1 occurence)
(setf start (+ occurence 2))
finally (return so-far)))
for path in
#+(or sbcl cmu lispworks) (directory wildcard)
#+openmcl (directory wildcard :directories t)
#+allegro (directory wildcard :directories-are-files nil)
#+cormanlisp (nconc (directory wildcard)
(cl::directory-subdirs dirname))
#-(or sbcl cmu lispworks openmcl allegro cormanlisp)
(directory wildcard)
when (let ((mismatch (mismatch (namestring path) full-so-far)))
(or (null mismatch) (= mismatch length)))
collect path))
(strings (mapcar #'namestring pathnames))
(first-string (car strings))
(length-common-prefix nil)
(completed-string nil)
(full-completed-string nil)
(input-is-directory-p (when (plusp (length so-far))
(char= (aref so-far (1- (length so-far))) #\/))))
(unless (null pathnames)
(setf length-common-prefix
(loop with length = (length first-string)
for string in (cdr strings)
do (setf length (min length (or (mismatch string first-string) length)))
finally (return length))))
(unless (null pathnames)
(setf completed-string
(subseq first-string (length directory-prefix)
(if (null (cdr pathnames)) nil length-common-prefix)))
(setf full-completed-string
(concatenate 'string directory-prefix completed-string)))
(case mode
((:complete-limited :complete-maximal)
(cond ((null pathnames)
(values so-far nil nil 0 nil))
((null (cdr pathnames))
(values completed-string (plusp (length so-far)) (car pathnames) 1 nil))
(input-is-directory-p
(values completed-string t (parse-namestring so-far) (length pathnames) nil))
(t
(values completed-string nil nil (length pathnames) nil))))
(:complete
;; This is reached when input is activated, if we did
;; completion, that would mean that an input of "foo" would
;; be expanded to "foobar" if "foobar" exists, even if the
;; user actually *wants* the "foo" pathname (to create the
;; file, for example).
(values so-far t so-far 1 nil))
(:possibilities
(values nil nil nil (length pathnames)
(loop with length = (length directory-prefix)
for name in pathnames
collect (list (subseq (namestring name) length nil)
name)))))))
(define-presentation-method accept ((type pathname) stream (view textual-view)
&key (default *default-pathname-defaults* defaultp)
((:default-type accept-default-type) type))
(multiple-value-bind (pathname success string)
(complete-input stream
#'filename-completer
:allow-any-input t)
(cond ((and pathname success)
(values (if merge-default
(progn
(unless (or (pathname-type pathname)
(null default-type))
(setf pathname (make-pathname :defaults pathname
:type default-type)))
(merge-pathnames pathname default default-version))
pathname)
type))
((and (zerop (length string))
defaultp)
(values default accept-default-type))
(t (values string 'string)))))
(defmethod presentation-replace-input :around
((stream input-editing-stream)
(object pathname) (type (eql 'pathname))
view &rest args &key &allow-other-keys)
;; This is fully valid and compliant, but it still smells slightly
;; like a hack.
(let ((name (pathname-name object))
(directory (when (pathname-directory object)
(directory-namestring object)))
(type (pathname-type object))
(string "")
(old-insp (stream-insertion-pointer stream)))
(setf string (or directory string))
(setf string (concatenate 'string string
(cond ((and name type)
(file-namestring object))
(name name)
(type (subseq
(namestring
(make-pathname
:name " "
:type type))
1)))))
(apply #'replace-input stream string args)
(when directory
(setf (stream-insertion-pointer stream)
(+ old-insp (if directory (length directory) 0)))
;; If we moved the insertion pointer, this might be a good idea.
(redraw-input-buffer stream old-insp))))
(defgeneric default-completion-name-key (item))
(defmethod default-completion-name-key ((item string))
item)
(defmethod default-completion-name-key ((item null))
"NIL")
(defmethod default-completion-name-key ((item cons))
(string (car item)))
(defmethod default-completion-name-key ((item symbol))
(string-capitalize (symbol-name item)))
(defmethod default-completion-name-key (item)
(princ-to-string item))
(eval-when (:compile-toplevel :load-toplevel :execute)
(defconstant +completion-options+
'((name-key 'default-completion-name-key)
documentation-key
(partial-completers '(#\Space)))))
(define-presentation-type completion (sequence
&key (test 'eql) (value-key 'identity))
:options #.+completion-options+
:inherit-from t)
(define-presentation-method presentation-typep (object (type completion))
(map nil #'(lambda (obj)
(when (funcall test object (funcall value-key obj))
(return-from presentation-typep t)))
sequence)
nil)
;;; Useful for subtype comparisons for several of the "member" style types
(defun sequence-subset-p (seq1 test1 value-key1 seq2 test2 value-key2)
(let ((test-fun (if (eq test1 test2)
test1
;; The object has to pass both type's equality test
#'(lambda (obj1 obj2)
(and (funcall test1 obj1 obj2)
(funcall test2 obj1 obj2))))))
(map nil #'(lambda (type-obj)
(unless (find (funcall value-key1 type-obj)
seq2
:test test-fun :key value-key2)
(return-from sequence-subset-p nil)))
seq1)
t))
(define-presentation-method presentation-subtypep ((type completion)
maybe-supertype)
(with-presentation-type-parameters (completion maybe-supertype)
(let ((super-sequence sequence)
(super-test test)
(super-value-key value-key))
(with-presentation-type-parameters (completion type)
(values (sequence-subset-p sequence test value-key
super-sequence super-test super-value-key)
t)))))
(define-presentation-method present (object (type completion) stream
(view textual-view)
&key acceptably for-context-type)
(declare (ignore acceptably for-context-type))
(let ((obj-pos (position object sequence :test test :key value-key)))
(if obj-pos
(write-string (funcall name-key (elt sequence obj-pos)) stream)
;; Should define a condition type here.
(error "~S is not of presentation type ~S" object type))))
(define-presentation-method accept ((type completion)
stream
(view textual-view)
&key)
(accept-using-completion (make-presentation-type-specifier
`(completion ,@parameters)
options)
stream
#'(lambda (input-string mode)
(complete-from-possibilities
input-string
sequence
partial-completers
:action mode
:name-key name-key
:value-key value-key))
:partial-completers partial-completers))
(define-presentation-type-abbreviation member (&rest elements)
(make-presentation-type-specifier `(completion ,elements)
:name-key name-key
:documentation-key documentation-key
:partial-completers partial-completers)
:options #.+completion-options+)
(define-presentation-type-abbreviation member-sequence (sequence
&key (test 'eql testp))
(make-presentation-type-specifier
`(completion ,sequence ,@(and testp `(:test ,test)))
:name-key name-key
:documentation-key documentation-key
:partial-completers partial-completers)
:options #.+completion-options+)
(defun member-alist-value-key (element)
(cond ((atom element)
element)
((atom (cdr element))
(cdr element))
((null (cddr element))
(cadr element))
(t (getf (cdr element) :value))))
(defun member-alist-doc-key (element)
(if (and (consp element) (consp (cdr element)) (consp (cddr element)))
(getf (cdr element) :documentation)))
(define-presentation-type-abbreviation member-alist (alist
&key (test 'eql testp))
(make-presentation-type-specifier
`(completion ,alist ,@(and testp `(:test ,test))
:value-key member-alist-value-key)
:name-key name-key
:documentation-key documentation-key
:partial-completers partial-completers)
:options ((name-key 'default-completion-name-key)
(documentation-key 'member-alist-doc-key)
(partial-completers '(#\Space))))
(define-presentation-type subset-completion (sequence
&key (test 'eql)
(value-key 'identity))
:options ((name-key 'default-completion-name-key)
documentation-key
(partial-completers '(#\Space))
(separator #\,)
(echo-space t))
:inherit-from t)
(define-presentation-method presentation-typep (object
(type subset-completion))
(map nil #'(lambda (obj)
(unless (find obj sequence :test test :key value-key)
(return-from presentation-typep nil)))
object)
t)
(define-presentation-method presentation-subtypep ((type subset-completion)
maybe-supertype)
(with-presentation-type-parameters (subset-completion maybe-supertype)
(let ((super-sequence sequence)
(super-test test)
(super-value-key value-key))
(with-presentation-type-parameters (subset-completion type)
(values (sequence-subset-p sequence test value-key
super-sequence super-test super-value-key)
t)))))
(define-presentation-method present ((object list) (type subset-completion)
stream
(view textual-view)
&key acceptably for-context-type)
(declare (ignore for-context-type))
(loop for tail on object
for (obj) = tail
do (progn
(present obj (presentation-type-of object)
:stream stream :view view
:acceptably acceptably
:sensitive nil)
(when (cdr tail)
(if acceptably
(princ separator stream)
(terpri stream))))))
(define-presentation-method present ((object vector) (type subset-completion)
stream
(view textual-view)
&key acceptably for-context-type)
(declare (ignore for-context-type))
(loop for i from 0 below (length object)
for obj = (aref object i)
do (progn
(present obj (presentation-type-of object)
:stream stream :view view
:acceptably acceptably
:sensitive nil)
(when (< i (1- (length object)))
(if acceptably
(princ separator stream)
(terpri stream))))))
;;; XXX is it a typo in the spec that subset, subset-sequence and subset-alist
;;; have the same options as completion, and not subset-completion?
(define-presentation-type-abbreviation subset (&rest elements)
(make-presentation-type-specifier `(subset-completion ,elements)
:name-key name-key
:documentation-key documentation-key
:partial-completers partial-completers)
:options #.+completion-options+)
(define-presentation-type-abbreviation subset-sequence (sequence
&key (test 'eql testp))
(make-presentation-type-specifier
`(subset-completion ,sequence ,@(and testp `(:test ,test)))
:name-key name-key
:documentation-key documentation-key
:partial-completers partial-completers)
:options #.+completion-options+)
(define-presentation-type-abbreviation subset-alist (alist
&key (test 'eql testp))
(make-presentation-type-specifier
`(subset-completion ,@(and testp `(:test ,test))
:value-key member-alist-value-key)
:name-key name-key
:documentation-key documentation-key
:partial-completers partial-completers)
:options ((name-key 'default-completion-name-key)
(documentation-key 'member-alist-doc-key)
(partial-completers '(#\Space))))
(define-presentation-type sequence (type)
:options ((separator #\,) (echo-space t))
:inherit-from 't
:parameters-are-types t)
(define-presentation-method presentation-type-specifier-p ((type sequence))
(and (listp type)
(consp (rest type))
(presentation-type-specifier-p (second type))))
(define-presentation-method presentation-typep (object (type sequence))
;; XXX TYPE here is the sequence element type, not the whole type specifier
(unless (or (listp object) (vectorp object))
(return-from presentation-typep nil))
(let ((real-type (expand-presentation-type-abbreviation type)))
(map nil #'(lambda (obj)
(unless (presentation-typep obj real-type)
(return-from presentation-typep nil)))
object)
t))
(define-presentation-method presentation-subtypep ((type sequence)
maybe-supertype)
(with-presentation-type-parameters (sequence type)
;; now TYPE is bound to the parameter TYPE
(let ((real-type (expand-presentation-type-abbreviation type)))
(with-presentation-type-parameters (sequence maybe-supertype)
(let ((real-super-type (expand-presentation-type-abbreviation type)))
(presentation-subtypep real-type real-super-type))))))
(defmethod presentation-type-of ((object cons))
'(sequence t))
;;; Do something interesting with the array-element-type
(defmethod presentation-type-of ((object vector))
'(sequence t))
(define-presentation-method present ((object list) (type sequence)
stream
(view textual-view)
&key acceptably for-context-type)
(declare (ignore for-context-type))
(loop for tail on object
for (obj) = tail
do (progn
(present obj type ; i.e., the type parameter
:stream stream :view view
:acceptably acceptably
:sensitive nil)
(when (cdr tail)
(write-char separator stream)))))
(define-presentation-method present ((object vector) (type sequence)
stream
(view textual-view)
&key acceptably for-context-type)
(declare (ignore for-context-type))
(loop for i from 0 below (length object)
for obj = (aref object i)
do (progn
(present obj type ; i.e., the type parameter
:stream stream :view view
:acceptably acceptably
:sensitive nil)
(when (< i (1- (length object)))
(write-char separator stream)))))
(define-presentation-method accept ((type sequence)
stream
(view textual-view)
&key)
(loop
with separators = (list separator)
for element = (accept type ; i.e., the type parameter
:stream stream
:view view
:prompt nil
:additional-delimiter-gestures separators)
collect element
do (progn
(when (not (eql (peek-char nil stream nil nil) separator))
(loop-finish))
(read-char stream)
(when echo-space
;; Make the space a noise string
(input-editor-format stream " ")))))
(define-presentation-type sequence-enumerated (&rest types)
:options ((separator #\,) (echo-space t))
:inherit-from 't
:parameters-are-types t)
(define-presentation-method presentation-typep (object
(type sequence-enumerated))
(unless (or (listp object) (vectorp object))
(return-from presentation-typep nil))
(map nil #'(lambda (obj type)
(let ((real-type (expand-presentation-type-abbreviation type)))
(unless (presentation-typep obj real-type)
(return-from presentation-typep nil))))
object
types)
t)
(define-presentation-method presentation-subtypep ((type sequence-enumerated)
maybe-supertype)
(with-presentation-type-parameters (sequence-enumerated maybe-supertype)
(let ((supertypes types))
(with-presentation-type-parameters (sequence-enumerated type)
(unless (eql (length supertypes) (length types))
(return-from presentation-subtypep (values nil t)))
(map nil
#'(lambda (element-type element-supertype)
(let ((real-type (expand-presentation-type-abbreviation
element-type))
(real-supertype (expand-presentation-type-abbreviation
element-supertype)))
(multiple-value-bind (subtypep determined)
(presentation-subtypep real-type real-supertype)
(cond ((not determined)
(return-from presentation-subtypep
(values nil nil)))
((not subtypep)
(return-from presentation-subtypep
(values nil t)))))))
types
supertypes)
(values t t)))))
(define-presentation-method present ((object list) (type sequence-enumerated)
stream
(view textual-view)
&key acceptably for-context-type)
(declare (ignore for-context-type))
(loop for tail on object
for (obj) = tail
for obj-type in types
do (progn
(present obj obj-type
:stream stream :view view
:acceptably acceptably
:sensitive nil)
(when (cdr tail)
(if acceptably
(princ separator stream)
(terpri stream))))))
(define-presentation-method present ((object vector) (type sequence-enumerated)
stream
(view textual-view)
&key acceptably for-context-type)
(declare (ignore for-context-type))
(loop for i from 0 below (length object)
for obj = (aref object i)
for obj-type in types
do (progn
(present obj obj-type
:stream stream :view view
:acceptably acceptably
:sensitive nil)
(when (< i (1- (length object)))
(if acceptably
(princ separator stream)
(terpri stream))))))
(define-presentation-method accept ((type sequence-enumerated)
stream
(view textual-view)
&key)
(loop
with element = nil and element-type = nil
and separators = (list separator)
for type-tail on types
for (this-type) = type-tail
do (setf (values element element-type)
(accept this-type
:stream stream
:view view
:prompt t
:display-default nil
:additional-delimiter-gestures separators))
collect element into sequence-val
do (progn
(when (not (eql (peek-char nil stream nil nil) separator))
(loop-finish))
(read-char stream)
(when echo-space
;; Make the space a noise string
(input-editor-format stream " ")))
finally (if (cdr type-tail)
(simple-parse-error "Input ~S too short for ~S."
sequence-val
types)
(return sequence-val))))
(define-presentation-type or (&rest types)
:inherit-from t
:parameters-are-types t)
(define-presentation-method presentation-typep (object (type or))
(loop for type in types
for real-type = (expand-presentation-type-abbreviation type)
do (when (presentation-typep object real-type)
(return-from presentation-typep t)))
nil)
(define-presentation-method present (object (type or)
stream
(view textual-view)
&key acceptably for-context-type)
(loop for or-type in types
for expanded-type = (expand-presentation-type-abbreviation or-type)
do (when (presentation-typep object expanded-type)
(present object expanded-type
:stream stream :view view
:acceptably acceptably
:for-context-type for-context-type)
(loop-finish))))
(define-presentation-method accept ((type or)
(stream input-editing-stream)
(view textual-view)
&key)
(let ((scan-begin (stream-scan-pointer stream)))
(loop for or-type in types
do (handler-case (return (accept or-type
:stream stream
:view view
:prompt nil))
(parse-error () (setf (stream-scan-pointer stream) scan-begin)))
finally (simple-parse-error "Input type is not one of ~S" types))))
;;; What does and inherit from? Maybe we'll punt on that for the moment.
;;; Unless it inherits from its arguments...
(define-presentation-type and (&rest types)
:parameters-are-types t)
(define-presentation-method presentation-typep (object (type and))
(loop for type in types
for real-type = (expand-presentation-type-abbreviation type)
do (with-presentation-type-decoded (name parameters)
real-type
(cond ((eq name 'satisfies)
(unless (funcall (car parameters) object)
(return-from presentation-typep nil)))
((eq name 'not)
(unless (not (presentation-typep object (car parameters)))
(return-from presentation-typep nil)))
(t (unless (presentation-typep object real-type)
(return-from presentation-typep nil))))))
t)
(define-presentation-method present (object (type and)
stream
(view textual-view)
&key acceptably for-context-type)
(present object (expand-presentation-type-abbreviation (car types))
:stream stream :view view
:acceptably acceptably
:for-context-type for-context-type))
(define-presentation-method accept
((type and) (stream input-editing-stream) (view textual-view) &rest args &key)
(let ((subtype (first types)))
(multiple-value-bind (obj ptype)
(apply-presentation-generic-function accept subtype stream view args)
(unless (presentation-typep obj type)
(simple-parse-error "Input object ~S is not of type ~S" obj type))
obj)))
(define-presentation-type-abbreviation token-or-type (tokens type)
`(or (member-alist ,tokens) ,type))
(define-presentation-type-abbreviation null-or-type (type)
`(or null ,type))
(define-presentation-type-abbreviation type-or-string (type)
`(or ,type string))
(define-presentation-method presentation-typep (object (type expression))
(declare (ignore object))
t)
(define-presentation-method present (object (type expression)
stream
(view textual-view)
&key acceptably for-context-type)
(declare (ignore for-context-type))
(let ((*print-readably* acceptably))
(prin1 object stream)))
(define-presentation-generic-function %accept-present-default
accept-present-default
(type-key parameters options type
stream view default default-supplied-p present-p query-identifier))
;;; All the expression and form reading stuff is in builtin-commands.lisp
;;; drag-n-drop fun
(defclass drag-n-drop-translator (presentation-translator)
((destination-ptype :reader destination-ptype :initarg :destination-ptype)
(feedback :reader feedback :initarg :feedback)
(highlighting :reader highlighting :initarg :highlighting)
(destination-translator :reader destination-translator
:initarg :destination-translator)))
(defvar *dragged-presentation* nil
"Bound to the presentation dragged in a drag-and-drop context")
(defvar *dragged-object* nil
"Bound to the object dragged in a drag-and-drop context")
()
;;; According to the Franz User's guide, the destination object is
;;; available in the tester, documentation, and translator function
;;; as destination-object. Therefore OBJECT is the dragged object. In
;;; our scheme the tester function, translator function etc. is
;;; really called on the destination object. So, we do a little
;;; shuffling of arguments here. We don't do that for the destination
;;; translator because we can call that ourselves in frame-drag-and-drop.
;;;
;;; Also, in Classic CLIM the destination presentation is passed as a
;;; destination-presentation keyword argument; hence the presentation argument
;;; is the dragged presentation.
(defmethod initialize-instance :after ((obj drag-n-drop-translator)
&key documentation
pointer-documentation
destination-translator)
;; This is starting to smell...
(flet ((make-adapter (func)
(lambda (object &rest args &key presentation &allow-other-keys)
(if *dragged-presentation*
(apply func
*dragged-object*
:presentation *dragged-presentation*
:destination-object object
:destination-presentation presentation
args)
(apply func object args)))))
(setf (slot-value obj 'documentation) (make-adapter documentation))
(when pointer-documentation
(setf (slot-value obj 'pointer-documentation)
(make-adapter pointer-documentation)))))
(defmacro define-drag-and-drop-translator
(name (from-type to-type destination-type command-table
&rest args &key
(gesture :select)
(tester 'default-translator-tester)
documentation
(pointer-documentation nil pointer-doc-p)
(menu t)
(priority 0)
(feedback 'frame-drag-and-drop-feedback)
(highlighting 'frame-drag-and-drop-highlighting))
arglist
&body body)
(declare (ignore tester gesture documentation pointer-documentation
menu priority))
(let* ((real-dest-type (expand-presentation-type-abbreviation
destination-type))
(name-string (command-name-from-symbol name))
(drag-string (format nil "Drag to ~A" name-string))
(pointer-doc (if pointer-doc-p
nil
`(:pointer-documentation
((object destination-object stream)
(declare (ignore object))
(write-string (if destination-object
,name-string
,drag-string)
stream))))))
(with-keywords-removed (args (:feedback :highlighting))
`(progn
(define-presentation-translator ,name
(,from-type ,to-type ,command-table
:tester-definitive t
,@args
,@pointer-doc
:feedback #',feedback :highlighting #',highlighting
:destination-ptype ',real-dest-type
:destination-translator #',(make-translator-fun arglist body)
:translator-class drag-n-drop-translator)
(presentation context-type frame event window x y)
(frame-drag-and-drop ',name ',command-table
presentation context-type
frame event window x y))))))
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