mdw@git.distorted.org.uk Git - clg/blob - glib/gobject.lisp

   1 ;; Common Lisp bindings for GTK+ v2.0
   2 ;; Copyright (C) 2000-2001 Espen S. Johnsen <esj@stud.cs.uit.no>
   3 ;;
   4 ;; This library is free software; you can redistribute it and/or
   5 ;; modify it under the terms of the GNU Lesser General Public
   6 ;; License as published by the Free Software Foundation; either
   7 ;; version 2 of the License, or (at your option) any later version.
   8 ;;
   9 ;; This library is distributed in the hope that it will be useful,
  10 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
  11 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12 ;; Lesser General Public License for more details.
  13 ;;
  14 ;; You should have received a copy of the GNU Lesser General Public
  15 ;; License along with this library; if not, write to the Free Software
  16 ;; Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  17
  18 ;; $Id: gobject.lisp,v 1.18 2004-11-07 01:23:38 espen Exp $
  19
  20 (in-package "GLIB")
  21
  22
  23 (eval-when (:compile-toplevel :load-toplevel :execute)
  24   (defclass gobject (ginstance)
  25     ()
  26     (:metaclass ginstance-class)
  27     (:alien-name "GObject")))
  28
  29 (defmethod print-object ((instance gobject) stream)
  30   (print-unreadable-object (instance stream :type t :identity nil)
  31     (if (slot-boundp instance 'location)
  32         (format stream "at 0x~X" (sap-int (proxy-location instance)))
  33       (write-string "(destroyed)" stream))))
  34
  35
  36 (defmethod initialize-instance ((object gobject) &rest initargs)
  37   ;; Extract initargs which we should pass directly to the GObeject
  38   ;; constructor
  39   (let* ((slotds (class-slots (class-of object)))
  40          (args (loop
  41                 as tmp = initargs then (cddr tmp) while tmp
  42                 as key = (first tmp)
  43                 as value = (second tmp)
  44                 as slotd = (find-if
  45                             #'(lambda (slotd)
  46                                 (member key (slot-definition-initargs slotd)))
  47                             slotds)
  48                 when (and (typep slotd 'effective-property-slot-definition)
  49                           (slot-value slotd 'construct))
  50                 collect (progn
  51                           (remf initargs key)
  52                           (list
  53                            (slot-definition-pname slotd)
  54                            (slot-definition-type slotd)
  55                            value)))))
  56     (if args
  57         (let* ((string-size (size-of 'string))
  58                (string-writer (writer-function 'string))
  59                (string-destroy (destroy-function 'string))
  60                (params (allocate-memory
  61                         (* (length args) (+ string-size +gvalue-size+)))))
  62           (loop
  63            for (pname type value) in args
  64            as tmp = params then (sap+ tmp (+ string-size +gvalue-size+))
  65            do (funcall string-writer pname tmp)
  66            (gvalue-init (sap+ tmp string-size) type value))
  67           (unwind-protect
  68                (setf
  69                 (slot-value object 'location)
  70                 (%gobject-newv (type-number-of object) (length args) params))
  71             (loop
  72              repeat (length args)
  73              as tmp = params then (sap+ tmp (+ string-size +gvalue-size+))
  74              do (funcall string-destroy tmp)
  75              (gvalue-unset (sap+ tmp string-size)))
  76             (deallocate-memory params)))
  77         (setf
  78          (slot-value object 'location)
  79          (%gobject-new (type-number-of object)))))
  80
  81   (%object-weak-ref object)
  82   (apply #'call-next-method object initargs))
  83
  84
  85 (defmethod initialize-instance :around ((object gobject) &rest initargs)
  86   (declare (ignore initargs))
  87   (call-next-method)
  88   (%object-weak-ref object))
  89
  90
  91 (defcallback weak-notify (nil (data int) (location pointer))
  92   (let ((object (find-cached-instance location)))
  93     (when object
  94 ;;       (warn "~A being finalized by the GObject system while still in existence in lisp" object)
  95       (slot-makunbound object 'location)
  96       (remove-cached-instance location))))
  97
  98 (defbinding %object-weak-ref (object) nil
  99   (object gobject)
 100   ((callback weak-notify) pointer)
 101   (0 unsigned-int))
 102
 103 (defbinding (%gobject-new "g_object_new") () pointer
 104   (type type-number)
 105   (nil null))
 106
 107 (defbinding (%gobject-newv "g_object_newv") () pointer
 108   (type type-number)
 109   (n-parameters unsigned-int)
 110   (params pointer))
 111
 112
 113
 114 ;;;; Property stuff
 115
 116 (defbinding %object-set-property () nil
 117   (object gobject)
 118   (name string)
 119   (value gvalue))
 120
 121 (defbinding %object-get-property () nil
 122   (object gobject)
 123   (name string)
 124   (value gvalue))
 125
 126 (defbinding %object-notify () nil
 127   (object gobject)
 128   (name string))
 129
 130 (defbinding object-freeze-notify () nil
 131   (object gobject))
 132
 133 (defbinding object-thaw-notify () nil
 134   (object gobject))
 135
 136 (defbinding %object-set-qdata-full () nil
 137   (object gobject)
 138   (id quark)
 139   (data unsigned-long)
 140   (destroy-marshal pointer))
 141
 142
 143 ;;;; User data
 144
 145 (defun (setf object-data) (data object key &key (test #'eq))
 146   (%object-set-qdata-full
 147    object (quark-from-object key :test test)
 148    (register-user-data data) (callback %destroy-user-data))
 149   data)
 150
 151 (defbinding %object-get-qdata () unsigned-long
 152   (object gobject)
 153   (id quark))
 154
 155 (defun object-data (object key &key (test #'eq))
 156   (find-user-data
 157    (%object-get-qdata object (quark-from-object key :test test))))
 158
 159
 160
 161 ;;;; Metaclass used for subclasses of gobject
 162
 163 ;(eval-when (:compile-toplevel :load-toplevel :execute)
 164   (defclass gobject-class (ginstance-class)
 165     ())
 166
 167   (defclass direct-property-slot-definition (direct-virtual-slot-definition)
 168     ((pname :reader slot-definition-pname :initarg :pname)
 169      (readable :initform t :reader slot-readable-p :initarg :readable)
 170      (writable :initform t :reader slot-writable-p :initarg :writable)
 171      (construct :initform nil :initarg :construct)))
 172
 173   (defclass effective-property-slot-definition (effective-virtual-slot-definition)
 174     ((pname :reader slot-definition-pname :initarg :pname)
 175      (readable :reader slot-readable-p :initarg :readable)
 176      (writable :reader slot-writable-p :initarg :writable)
 177      (construct :initarg :construct)));)
 178
 179 (defbinding %object-ref () pointer
 180   (location pointer))
 181
 182 (defbinding %object-unref () nil
 183   (location pointer))
 184
 185 (defmethod reference-foreign ((class gobject-class) location)
 186   (declare (ignore class))
 187   (%object-ref location))
 188
 189 (defmethod unreference-foreign ((class gobject-class) location)
 190   (declare (ignore class))
 191   (%object-unref location))
 192
 193
 194 ; (defbinding object-class-install-param () nil
 195 ;   (class pointer)
 196 ;   (id unsigned-int)
 197 ;   (parameter parameter))
 198
 199 ; (defbinding object-class-find-param-spec () parameter
 200 ;   (class pointer)
 201 ;   (name string))
 202
 203 (defun signal-name-to-string (name)
 204   (substitute #\_ #\- (string-downcase (string name))))
 205
 206
 207 (defmethod direct-slot-definition-class ((class gobject-class) &rest initargs)
 208   (case (getf initargs :allocation)
 209     (:property (find-class 'direct-property-slot-definition))
 210     (t (call-next-method))))
 211
 212 (defmethod effective-slot-definition-class ((class gobject-class) &rest initargs)
 213   (case (getf initargs :allocation)
 214     (:property (find-class 'effective-property-slot-definition))
 215     (t (call-next-method))))
 216
 217 (defmethod compute-effective-slot-definition-initargs ((class gobject-class) direct-slotds)
 218   (if (eq (most-specific-slot-value direct-slotds 'allocation) :property)
 219       (nconc
 220        (list :pname (signal-name-to-string
 221                      (most-specific-slot-value direct-slotds 'pname))
 222              :readable (most-specific-slot-value direct-slotds 'readable)
 223              :writable (most-specific-slot-value direct-slotds 'writable)
 224              :construct (most-specific-slot-value direct-slotds 'construct))
 225        (call-next-method))
 226     (call-next-method)))
 227
 228
 229 (defmethod initialize-internal-slot-functions ((slotd effective-property-slot-definition))
 230   (let* ((type (slot-definition-type slotd))
 231          (pname (slot-definition-pname slotd))
 232          (type-number (find-type-number type)))
 233     (unless (slot-boundp slotd 'reader-function)
 234       (setf
 235        (slot-value slotd 'reader-function)
 236        (if (slot-readable-p slotd)
 237            (let () ;(reader (reader-function (type-from-number type-number))))
 238              #'(lambda (object)
 239                  (let ((gvalue (gvalue-new type-number)))
 240                    (%object-get-property object pname gvalue)
 241                    (unwind-protect
 242                         (funcall #|reader|# (reader-function (type-from-number type-number))  gvalue +gvalue-value-offset+)
 243                      (gvalue-free gvalue t)))))
 244            #'(lambda (value object)
 245                (error "Slot is not readable: ~A" (slot-definition-name slotd))))))
 246
 247     (unless (slot-boundp slotd 'writer-function)
 248       (setf
 249        (slot-value slotd 'writer-function)
 250        (if (slot-writable-p slotd)
 251            (let ();; (writer (writer-function (type-from-number type-number)))
 252 ;;               (destroy (destroy-function (type-from-number type-number))))
 253              #'(lambda (value object)
 254                  (let ((gvalue (gvalue-new type-number)))
 255                    (funcall #|writer|# (writer-function (type-from-number type-number)) value gvalue +gvalue-value-offset+)
 256                    (%object-set-property object pname gvalue)
 257 ;                  (funcall #|destroy|#(destroy-function (type-from-number type-number)) gvalue +gvalue-value-offset+)
 258                    (gvalue-free gvalue t)
 259                    value)))
 260            #'(lambda (value object)
 261                (error "Slot is not writable: ~A" (slot-definition-name slotd))))))
 262
 263     (unless (slot-boundp slotd 'boundp-function)
 264       (setf
 265        (slot-value slotd 'boundp-function)
 266        #'(lambda (object)
 267            (declare (ignore object))
 268            t))))
 269   (call-next-method))
 270
 271
 272 (defmethod validate-superclass ((class gobject-class)
 273                                 (super pcl::standard-class))
 274 ;  (subtypep (class-name super) 'gobject)
 275   t)
 276
 277
 278
 279 ;;;;
 280
 281 (defbinding %object-class-list-properties () pointer
 282   (class pointer)
 283   (n-properties unsigned-int :out))
 284
 285
 286 (defun %map-params (params length type inherited-p)
 287   (if inherited-p
 288       (map-c-vector 'list #'identity params 'param length)
 289     (let ((properties ()))
 290       (map-c-vector 'list
 291        #'(lambda (param)
 292            (when (eql (param-owner-type param) type)
 293              (push param properties)))
 294        params 'param length)
 295       (nreverse properties))))
 296
 297 (defun query-object-class-properties (type &optional inherited-p)
 298   (let* ((type-number (find-type-number type))
 299          (class (type-class-ref type-number)))
 300     (unwind-protect
 301          (multiple-value-bind (array length)
 302              (%object-class-list-properties class)
 303            (unwind-protect
 304                 (%map-params array length type-number inherited-p)
 305              (deallocate-memory array)))
 306 ;      (type-class-unref type-number)
 307       )))
 308
 309
 310 (defun default-slot-name (name)
 311   (intern (substitute #\- #\_ (string-upcase (string-upcase name)))))
 312
 313 (defun default-slot-accessor (class-name slot-name type)
 314   (intern
 315    (format
 316     nil "~A-~A~A" class-name slot-name
 317     (if (eq type 'boolean) "-P" ""))))
 318
 319
 320 (defun slot-definition-from-property (class property)
 321   (with-slots (name flags value-type documentation) property
 322     (let* ((slot-name (default-slot-name name))
 323            (slot-type (or (type-from-number value-type) value-type))
 324            (accessor (default-slot-accessor class slot-name slot-type)))
 325
 326       `(,slot-name
 327         :allocation :property :pname ,name
 328
 329         ;; accessors
 330         ,@(cond
 331            ((and
 332              (member :writable flags) (member :readable flags)
 333              (not (member :construct-only flags)))
 334             (list :accessor accessor))
 335            ((and (member :writable flags) (not (member :construct-only flags)))
 336             (list :writer `(setf ,accessor)))
 337            ((member :readable flags)
 338             (list :reader accessor)))
 339
 340         ;; readable/writable/construct
 341         ,@(when (or (not (member :writable flags))
 342                     (member :construct-only flags))
 343             '(:writable nil))
 344         ,@(when (not (member :readable flags))
 345             '(:readable nil))
 346         ,@(when (or (member :construct flags)
 347                     (member :construct-only flags))
 348             '(:construct t))
 349
 350         ;; initargs
 351         ,@(when (or (member :construct flags)
 352                     (member :construct-only flags)
 353                     (member :writable flags))
 354             (list :initarg (intern (string slot-name) "KEYWORD")))
 355
 356         :type ,slot-type
 357         :documentation ,documentation))))
 358
 359
 360 (defun slot-definitions (class properties slots)
 361   (loop
 362    with manual-slots = slots
 363    for property in properties
 364    unless (find-if
 365            #'(lambda (slot)
 366                (destructuring-bind (name &rest args) slot
 367                  (or
 368                   (equal (param-name property) (getf args :pname))
 369                   (eq (default-slot-name (param-name property)) name))))
 370            manual-slots)
 371    do (push (slot-definition-from-property class property) slots))
 372   (delete-if #'(lambda (slot) (getf (rest slot) :ignore)) slots))
 373
 374
 375 (defun expand-gobject-type (type &optional options (metaclass 'gobject-class))
 376   (let ((supers (cons (supertype type) (implements type)))
 377         (class  (type-from-number type))
 378         (slots (getf options :slots)))
 379     `(defclass ,class ,supers
 380       ,(slot-definitions class (query-object-class-properties type) slots)
 381       (:metaclass ,metaclass)
 382       (:alien-name ,(find-type-name type)))))
 383
 384
 385 (register-derivable-type 'gobject "GObject" 'expand-gobject-type)