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 1.20 2004-11-09 10:10:59 espen Exp $
  19
  20 (in-package "GLIB")
  21
  22
  23 ;;;; Metaclass used for subclasses of gobject
  24
  25 (eval-when (:compile-toplevel :load-toplevel :execute)
  26   (defclass gobject-class (ginstance-class)
  27     ())
  28
  29   (defmethod validate-superclass ((class gobject-class)
  30                                 (super pcl::standard-class))
  31 ;  (subtypep (class-name super) 'gobject)
  32     t))
  33
  34 (defclass direct-property-slot-definition (direct-virtual-slot-definition)
  35   ((pname :reader slot-definition-pname :initarg :pname)
  36    (readable :initform t :reader slot-readable-p :initarg :readable)
  37    (writable :initform t :reader slot-writable-p :initarg :writable)
  38    (construct :initform nil :initarg :construct)))
  39
  40 (defclass effective-property-slot-definition (effective-virtual-slot-definition)
  41   ((pname :reader slot-definition-pname :initarg :pname)
  42    (readable :reader slot-readable-p :initarg :readable)
  43    (writable :reader slot-writable-p :initarg :writable)
  44    (construct :initarg :construct)));)
  45
  46 (defbinding %object-ref () pointer
  47   (location pointer))
  48
  49 (defbinding %object-unref () nil
  50   (location pointer))
  51
  52 (defmethod reference-foreign ((class gobject-class) location)
  53   (declare (ignore class))
  54   (%object-ref location))
  55
  56 (defmethod unreference-foreign ((class gobject-class) location)
  57   (declare (ignore class))
  58   (%object-unref location))
  59
  60
  61 ; (defbinding object-class-install-param () nil
  62 ;   (class pointer)
  63 ;   (id unsigned-int)
  64 ;   (parameter parameter))
  65
  66 ; (defbinding object-class-find-param-spec () parameter
  67 ;   (class pointer)
  68 ;   (name string))
  69
  70 (defun signal-name-to-string (name)
  71   (substitute #\_ #\- (string-downcase (string name))))
  72
  73
  74 (defmethod direct-slot-definition-class ((class gobject-class) &rest initargs)
  75   (case (getf initargs :allocation)
  76     (:property (find-class 'direct-property-slot-definition))
  77     (t (call-next-method))))
  78
  79 (defmethod effective-slot-definition-class ((class gobject-class) &rest initargs)
  80   (case (getf initargs :allocation)
  81     (:property (find-class 'effective-property-slot-definition))
  82     (t (call-next-method))))
  83
  84 (defmethod compute-effective-slot-definition-initargs ((class gobject-class) direct-slotds)
  85   (if (eq (most-specific-slot-value direct-slotds 'allocation) :property)
  86       (nconc
  87        (list :pname (signal-name-to-string
  88                      (most-specific-slot-value direct-slotds 'pname))
  89              :readable (most-specific-slot-value direct-slotds 'readable)
  90              :writable (most-specific-slot-value direct-slotds 'writable)
  91              :construct (most-specific-slot-value direct-slotds 'construct))
  92        (call-next-method))
  93     (call-next-method)))
  94
  95
  96 (defmethod initialize-internal-slot-functions ((slotd effective-property-slot-definition))
  97   (let* ((type (slot-definition-type slotd))
  98          (pname (slot-definition-pname slotd))
  99          (type-number (find-type-number type)))
 100     (unless (slot-boundp slotd 'reader-function)
 101       (setf
 102        (slot-value slotd 'reader-function)
 103        (if (slot-readable-p slotd)
 104            (let () ;(reader (reader-function (type-from-number type-number))))
 105              #'(lambda (object)
 106                  (let ((gvalue (gvalue-new type-number)))
 107                    (%object-get-property object pname gvalue)
 108                    (unwind-protect
 109                         (funcall #|reader|# (reader-function (type-from-number type-number))  gvalue +gvalue-value-offset+)
 110                      (gvalue-free gvalue t)))))
 111            #'(lambda (value object)
 112                (error "Slot is not readable: ~A" (slot-definition-name slotd))))))
 113
 114     (unless (slot-boundp slotd 'writer-function)
 115       (setf
 116        (slot-value slotd 'writer-function)
 117        (if (slot-writable-p slotd)
 118            (let ();; (writer (writer-function (type-from-number type-number)))
 119 ;;               (destroy (destroy-function (type-from-number type-number))))
 120              #'(lambda (value object)
 121                  (let ((gvalue (gvalue-new type-number)))
 122                    (funcall #|writer|# (writer-function (type-from-number type-number)) value gvalue +gvalue-value-offset+)
 123                    (%object-set-property object pname gvalue)
 124 ;                  (funcall #|destroy|#(destroy-function (type-from-number type-number)) gvalue +gvalue-value-offset+)
 125                    (gvalue-free gvalue t)
 126                    value)))
 127            #'(lambda (value object)
 128                (error "Slot is not writable: ~A" (slot-definition-name slotd))))))
 129
 130     (unless (slot-boundp slotd 'boundp-function)
 131       (setf
 132        (slot-value slotd 'boundp-function)
 133        #'(lambda (object)
 134            (declare (ignore object))
 135            t))))
 136   (call-next-method))
 137
 138
 139 ;;;; Super class for all classes in the GObject type hierarchy
 140
 141 (eval-when (:compile-toplevel :load-toplevel :execute)
 142   (defclass gobject (ginstance)
 143     ()
 144     (:metaclass gobject-class)
 145     (:alien-name "GObject")))
 146
 147 (defmethod print-object ((instance gobject) stream)
 148   (print-unreadable-object (instance stream :type t :identity nil)
 149     (if (slot-boundp instance 'location)
 150         (format stream "at 0x~X" (sap-int (proxy-location instance)))
 151       (write-string "(destroyed)" stream))))
 152
 153
 154 (defmethod initialize-instance ((object gobject) &rest initargs)
 155   ;; Extract initargs which we should pass directly to the GObeject
 156   ;; constructor
 157   (let* ((slotds (class-slots (class-of object)))
 158          (args (loop
 159                 as tmp = initargs then (cddr tmp) while tmp
 160                 as key = (first tmp)
 161                 as value = (second tmp)
 162                 as slotd = (find-if
 163                             #'(lambda (slotd)
 164                                 (member key (slot-definition-initargs slotd)))
 165                             slotds)
 166                 when (and (typep slotd 'effective-property-slot-definition)
 167                           (slot-value slotd 'construct))
 168                 collect (progn
 169                           (remf initargs key)
 170                           (list
 171                            (slot-definition-pname slotd)
 172                            (slot-definition-type slotd)
 173                            value)))))
 174     (if args
 175         (let* ((string-size (size-of 'string))
 176                (string-writer (writer-function 'string))
 177                (string-destroy (destroy-function 'string))
 178                (params (allocate-memory
 179                         (* (length args) (+ string-size +gvalue-size+)))))
 180           (loop
 181            for (pname type value) in args
 182            as tmp = params then (sap+ tmp (+ string-size +gvalue-size+))
 183            do (funcall string-writer pname tmp)
 184            (gvalue-init (sap+ tmp string-size) type value))
 185           (unwind-protect
 186                (setf
 187                 (slot-value object 'location)
 188                 (%gobject-newv (type-number-of object) (length args) params))
 189             (loop
 190              repeat (length args)
 191              as tmp = params then (sap+ tmp (+ string-size +gvalue-size+))
 192              do (funcall string-destroy tmp)
 193              (gvalue-unset (sap+ tmp string-size)))
 194             (deallocate-memory params)))
 195         (setf
 196          (slot-value object 'location)
 197          (%gobject-new (type-number-of object)))))
 198
 199   (%object-weak-ref object)
 200   (apply #'call-next-method object initargs))
 201
 202
 203 (defmethod initialize-instance :around ((object gobject) &rest initargs)
 204   (declare (ignore initargs))
 205   (call-next-method)
 206   (%object-weak-ref object))
 207
 208 (defmethod instance-finalizer ((instance gobject))
 209   (let ((location (proxy-location instance)))
 210     #'(lambda ()
 211         (remove-cached-instance location)
 212         (%weak-object-unref location)
 213         (%object-unref location))))
 214
 215
 216 (defcallback weak-notify (nil (data int) (location pointer))
 217   (let ((object (find-cached-instance location)))
 218     (when object
 219 ;;       (warn "~A being finalized by the GObject system while still in existence in lisp" object)
 220       (slot-makunbound object 'location)
 221       (remove-cached-instance location))))
 222
 223 (defbinding %object-weak-ref (object) nil
 224   (object gobject)
 225   ((callback weak-notify) pointer)
 226   (0 unsigned-int))
 227
 228 (defbinding %object-weak-unref () nil
 229   (location pointer)
 230   ((callback weak-notify) pointer)
 231   (0 unsigned-int))
 232
 233
 234 (defbinding (%gobject-new "g_object_new") () pointer
 235   (type type-number)
 236   (nil null))
 237
 238 (defbinding (%gobject-newv "g_object_newv") () pointer
 239   (type type-number)
 240   (n-parameters unsigned-int)
 241   (params pointer))
 242
 243
 244
 245 ;;;; Property stuff
 246
 247 (defbinding %object-set-property () nil
 248   (object gobject)
 249   (name string)
 250   (value gvalue))
 251
 252 (defbinding %object-get-property () nil
 253   (object gobject)
 254   (name string)
 255   (value gvalue))
 256
 257 (defbinding %object-notify () nil
 258   (object gobject)
 259   (name string))
 260
 261 (defbinding object-freeze-notify () nil
 262   (object gobject))
 263
 264 (defbinding object-thaw-notify () nil
 265   (object gobject))
 266
 267 (defbinding %object-set-qdata-full () nil
 268   (object gobject)
 269   (id quark)
 270   (data unsigned-long)
 271   (destroy-marshal pointer))
 272
 273
 274 ;;;; User data
 275
 276 (defun (setf object-data) (data object key &key (test #'eq))
 277   (%object-set-qdata-full
 278    object (quark-from-object key :test test)
 279    (register-user-data data) (callback %destroy-user-data))
 280   data)
 281
 282 (defbinding %object-get-qdata () unsigned-long
 283   (object gobject)
 284   (id quark))
 285
 286 (defun object-data (object key &key (test #'eq))
 287   (find-user-data
 288    (%object-get-qdata object (quark-from-object key :test test))))
 289
 290
 291 ;;;;
 292
 293 (defbinding %object-class-list-properties () pointer
 294   (class pointer)
 295   (n-properties unsigned-int :out))
 296
 297
 298 (defun %map-params (params length type inherited-p)
 299   (if inherited-p
 300       (map-c-vector 'list #'identity params 'param length)
 301     (let ((properties ()))
 302       (map-c-vector 'list
 303        #'(lambda (param)
 304            (when (eql (param-owner-type param) type)
 305              (push param properties)))
 306        params 'param length)
 307       (nreverse properties))))
 308
 309 (defun query-object-class-properties (type &optional inherited-p)
 310   (let* ((type-number (find-type-number type))
 311          (class (type-class-ref type-number)))
 312     (unwind-protect
 313          (multiple-value-bind (array length)
 314              (%object-class-list-properties class)
 315            (unwind-protect
 316                 (%map-params array length type-number inherited-p)
 317              (deallocate-memory array)))
 318 ;      (type-class-unref type-number)
 319       )))
 320
 321
 322 (defun default-slot-name (name)
 323   (intern (substitute #\- #\_ (string-upcase (string-upcase name)))))
 324
 325 (defun default-slot-accessor (class-name slot-name type)
 326   (intern
 327    (format
 328     nil "~A-~A~A" class-name slot-name
 329     (if (eq type 'boolean) "-P" ""))))
 330
 331
 332 (defun slot-definition-from-property (class property)
 333   (with-slots (name flags value-type documentation) property
 334     (let* ((slot-name (default-slot-name name))
 335            (slot-type (or (type-from-number value-type) value-type))
 336            (accessor (default-slot-accessor class slot-name slot-type)))
 337
 338       `(,slot-name
 339         :allocation :property :pname ,name
 340
 341         ;; accessors
 342         ,@(cond
 343            ((and
 344              (member :writable flags) (member :readable flags)
 345              (not (member :construct-only flags)))
 346             (list :accessor accessor))
 347            ((and (member :writable flags) (not (member :construct-only flags)))
 348             (list :writer `(setf ,accessor)))
 349            ((member :readable flags)
 350             (list :reader accessor)))
 351
 352         ;; readable/writable/construct
 353         ,@(when (or (not (member :writable flags))
 354                     (member :construct-only flags))
 355             '(:writable nil))
 356         ,@(when (not (member :readable flags))
 357             '(:readable nil))
 358         ,@(when (or (member :construct flags)
 359                     (member :construct-only flags))
 360             '(:construct t))
 361
 362         ;; initargs
 363         ,@(when (or (member :construct flags)
 364                     (member :construct-only flags)
 365                     (member :writable flags))
 366             (list :initarg (intern (string slot-name) "KEYWORD")))
 367
 368         :type ,slot-type
 369         :documentation ,documentation))))
 370
 371
 372 (defun slot-definitions (class properties slots)
 373   (loop
 374    with manual-slots = slots
 375    for property in properties
 376    unless (find-if
 377            #'(lambda (slot)
 378                (destructuring-bind (name &rest args) slot
 379                  (or
 380                   (equal (param-name property) (getf args :pname))
 381                   (eq (default-slot-name (param-name property)) name))))
 382            manual-slots)
 383    do (push (slot-definition-from-property class property) slots))
 384   (delete-if #'(lambda (slot) (getf (rest slot) :ignore)) slots))
 385
 386
 387 (defun expand-gobject-type (type &optional options (metaclass 'gobject-class))
 388   (let ((supers (cons (supertype type) (implements type)))
 389         (class  (type-from-number type))
 390         (slots (getf options :slots)))
 391     `(defclass ,class ,supers
 392       ,(slot-definitions class (query-object-class-properties type) slots)
 393       (:metaclass ,metaclass)
 394       (:alien-name ,(find-type-name type)))))
 395
 396
 397 (register-derivable-type 'gobject "GObject" 'expand-gobject-type)