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

   1 ;; Common Lisp bindings for GTK+ v2.x
   2 ;; Copyright 2000-2005 Espen S. Johnsen <espen@users.sf.net>
   3 ;;
   4 ;; Permission is hereby granted, free of charge, to any person obtaining
   5 ;; a copy of this software and associated documentation files (the
   6 ;; "Software"), to deal in the Software without restriction, including
   7 ;; without limitation the rights to use, copy, modify, merge, publish,
   8 ;; distribute, sublicense, and/or sell copies of the Software, and to
   9 ;; permit persons to whom the Software is furnished to do so, subject to
  10 ;; the following conditions:
  11 ;;
  12 ;; The above copyright notice and this permission notice shall be
  13 ;; included in all copies or substantial portions of the Software.
  14 ;;
  15 ;; THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  16 ;; EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  17 ;; MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
  18 ;; IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
  19 ;; CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
  20 ;; TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
  21 ;; SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  22
  23 ;; $Id: gobject.lisp,v 1.42 2006-02-04 12:15:32 espen Exp $
  24
  25 (in-package "GLIB")
  26
  27
  28 ;;;; Metaclass used for subclasses of gobject
  29
  30 (eval-when (:compile-toplevel :load-toplevel :execute)
  31   (defclass gobject-class (ginstance-class)
  32     ((instance-slots-p :initform nil
  33       :documentation "Non NIL if the class has slots with instance allocation")))
  34
  35   (defmethod validate-superclass ((class gobject-class) (super standard-class))
  36 ;  (subtypep (class-name super) 'gobject)
  37     t))
  38
  39 (defclass direct-property-slot-definition (direct-virtual-slot-definition)
  40   ((pname :reader slot-definition-pname :initarg :pname)
  41    (readable :initform t :reader slot-readable-p :initarg :readable)
  42    (writable :initform t :reader slot-writable-p :initarg :writable)
  43    (construct :initform nil :initarg :construct)))
  44
  45 (defclass effective-property-slot-definition (effective-virtual-slot-definition)
  46   ((pname :reader slot-definition-pname :initarg :pname)
  47    (readable :reader slot-readable-p :initarg :readable)
  48    (writable :reader slot-writable-p :initarg :writable)
  49    (construct :initarg :construct)))
  50
  51 (defclass direct-user-data-slot-definition (direct-virtual-slot-definition)
  52   ())
  53
  54 (defclass effective-user-data-slot-definition (effective-virtual-slot-definition)
  55   ())
  56
  57
  58 (defbinding %object-ref () pointer
  59   (location pointer))
  60
  61 (defbinding %object-unref () nil
  62   (location pointer))
  63
  64 #+glib2.8
  65 (progn
  66   (defcallback toggle-ref-callback (nil (data pointer) (location pointer) (last-ref-p boolean))
  67     #+debug-ref-counting
  68     (if last-ref-p
  69         (format t "Object at 0x~8,'0X has no foreign references~%" (sap-int location))
  70       (format t "Foreign reference added to object at 0x~8,'0X~%" (sap-int location)))
  71     (if last-ref-p
  72         (cache-instance (find-cached-instance location) t)
  73       (cache-instance (find-cached-instance location) nil)))
  74
  75   (defbinding %object-add-toggle-ref () pointer
  76     (location pointer)
  77     ((callback toggle-ref-callback) pointer)
  78     (nil null))
  79
  80   (defbinding %object-remove-toggle-ref () pointer
  81     (location pointer)
  82     ((callback toggle-ref-callback) pointer)
  83     (nil null)))
  84
  85 (defmethod reference-foreign ((class gobject-class) location)
  86   (declare (ignore class))
  87   (%object-ref location))
  88
  89 (defmethod unreference-foreign ((class gobject-class) location)
  90   (declare (ignore class))
  91   (%object-unref location))
  92
  93 #+debug-ref-counting
  94 (progn
  95   (defcallback weak-ref-callback (nil (data pointer) (location pointer))
  96     (format t "Object at 0x~8,'0X being finalized~%" (sap-int location)))
  97
  98   (defbinding %object-weak-ref () pointer
  99     (location pointer)
 100     ((callback weak-ref-callback) pointer)
 101     (nil null)))
 102
 103
 104 ; (defbinding object-class-install-param () nil
 105 ;   (class pointer)
 106 ;   (id unsigned-int)
 107 ;   (parameter parameter))
 108
 109 ; (defbinding object-class-find-param-spec () parameter
 110 ;   (class pointer)
 111 ;   (name string))
 112
 113 (defun signal-name-to-string (name)
 114   (substitute #\_ #\- (string-downcase (string name))))
 115
 116
 117 (defmethod direct-slot-definition-class ((class gobject-class) &rest initargs)
 118   (case (getf initargs :allocation)
 119     (:property (find-class 'direct-property-slot-definition))
 120     (:user-data (find-class 'direct-user-data-slot-definition))
 121     (t (call-next-method))))
 122
 123 (defmethod effective-slot-definition-class ((class gobject-class) &rest initargs)
 124   (case (getf initargs :allocation)
 125     (:property (find-class 'effective-property-slot-definition))
 126     (:user-data (find-class 'effective-user-data-slot-definition))
 127     (t (call-next-method))))
 128
 129 (defmethod compute-effective-slot-definition-initargs ((class gobject-class) direct-slotds)
 130   (if (typep (first direct-slotds) 'direct-property-slot-definition)
 131       (nconc
 132        (list :pname (signal-name-to-string
 133                      (most-specific-slot-value direct-slotds 'pname))
 134              :readable (most-specific-slot-value direct-slotds 'readable)
 135              :writable (most-specific-slot-value direct-slotds 'writable)
 136              :construct (most-specific-slot-value direct-slotds 'construct))
 137        (call-next-method))
 138     (call-next-method)))
 139
 140
 141 (defmethod initialize-internal-slot-functions ((slotd effective-property-slot-definition))
 142   (let ((type (slot-definition-type slotd))
 143         (pname (slot-definition-pname slotd)))
 144     (when (and (not (slot-boundp slotd 'getter)) (slot-readable-p slotd))
 145       (setf
 146        (slot-value slotd 'getter)
 147        (let ((reader nil))
 148          #'(lambda (object)
 149              (unless reader
 150                (setq reader (reader-function type)))
 151              (let ((gvalue (gvalue-new type)))
 152                (%object-get-property object pname gvalue)
 153                (unwind-protect
 154                  (funcall reader  gvalue +gvalue-value-offset+)
 155                  (gvalue-free gvalue t)))))))
 156
 157     (when (and (not (slot-boundp slotd 'setter)) (slot-writable-p slotd))
 158       (setf
 159        (slot-value slotd 'setter)
 160        (let ((writer nil))
 161          #'(lambda (value object)
 162              (unless writer
 163                (setq writer (writer-function type)))
 164              (let ((gvalue (gvalue-new type)))
 165                (funcall writer value gvalue +gvalue-value-offset+)
 166                (%object-set-property object pname gvalue)
 167                (gvalue-free gvalue t)
 168                value))))))
 169
 170   (call-next-method))
 171
 172 (defmethod initialize-internal-slot-functions ((slotd effective-user-data-slot-definition))
 173   (let ((slot-name (slot-definition-name slotd)))
 174     (unless (slot-boundp slotd 'getter)
 175       (setf
 176        (slot-value slotd 'getter)
 177        #'(lambda (object)
 178            (prog1 (user-data object slot-name)))))
 179     (unless (slot-boundp slotd 'setter)
 180       (setf
 181        (slot-value slotd 'setter)
 182        #'(lambda (value object)
 183            (setf (user-data object slot-name) value))))
 184     (unless (slot-boundp slotd 'boundp)
 185       (setf
 186        (slot-value slotd 'boundp)
 187        #'(lambda (object)
 188            (user-data-p object slot-name)))))
 189   (call-next-method))
 190
 191 (defmethod shared-initialize :after ((class gobject-class) names &rest initargs)
 192   (declare (ignore initargs))
 193   (when (some #'(lambda (slotd)
 194                   (and
 195                    (eq (slot-definition-allocation slotd) :instance)
 196                    (not (typep slotd 'effective-special-slot-definition))))
 197               (class-slots class))
 198     (setf (slot-value class 'instance-slots-p) t)))
 199
 200
 201
 202 ;;;; Super class for all classes in the GObject type hierarchy
 203
 204 (eval-when (:compile-toplevel :load-toplevel :execute)
 205   (defclass gobject (ginstance)
 206     ()
 207     (:metaclass gobject-class)
 208     (:gtype "GObject")))
 209
 210
 211 (defun initial-add (object function initargs key pkey)
 212   (loop
 213    as (initarg value . rest) = initargs then rest
 214    do (cond
 215        ((eq initarg key) (funcall function object value))
 216        ((eq initarg pkey) (mapc #'(lambda (value)
 217                                     (funcall function object value))
 218                                 value)))
 219        while rest))
 220
 221 (defun initial-apply-add (object function initargs key pkey)
 222   (initial-add object #'(lambda (object value)
 223                           (apply function object (mklist value)))
 224                initargs key pkey))
 225
 226
 227 (defmethod initialize-instance :around ((object gobject) &rest initargs)
 228   (declare (ignore initargs))
 229   (call-next-method)
 230   #+debug-ref-counting(%object-weak-ref (foreign-location object))
 231   #+glib2.8
 232   (when (slot-value (class-of object) 'instance-slots-p)
 233     (with-slots (location) object
 234       (%object-add-toggle-ref location)
 235       (%object-unref location))))
 236
 237
 238 (defmethod initialize-instance ((object gobject) &rest initargs)
 239   (unless (slot-boundp object 'location)
 240     ;; Extract initargs which we should pass directly to the GObject
 241     ;; constructor
 242     (let* ((slotds (class-slots (class-of object)))
 243            (args (when initargs
 244                    (loop
 245                     as (key value . rest) = initargs then rest
 246                     as slotd = (find-if
 247                                 #'(lambda (slotd)
 248                                     (member key (slot-definition-initargs slotd)))
 249                                 slotds)
 250                     when (and (typep slotd 'effective-property-slot-definition)
 251                               (slot-value slotd 'construct))
 252                     collect (progn
 253                               (remf initargs key)
 254                               (list
 255                                (slot-definition-pname slotd)
 256                                (slot-definition-type slotd)
 257                                value))
 258                     while rest))))
 259       (if args
 260           (let* ((string-size (size-of 'string))
 261                  (string-writer (writer-function 'string))
 262                  (string-destroy (destroy-function 'string))
 263                  (params (allocate-memory
 264                           (* (length args) (+ string-size +gvalue-size+)))))
 265             (loop
 266              for (pname type value) in args
 267              as tmp = params then (sap+ tmp (+ string-size +gvalue-size+))
 268              do (funcall string-writer pname tmp)
 269              (gvalue-init (sap+ tmp string-size) type value))
 270             (unwind-protect
 271                 (setf
 272                  (slot-value object 'location)
 273                  (%gobject-newv (type-number-of object) (length args) params))
 274               (loop
 275                repeat (length args)
 276                as tmp = params then (sap+ tmp (+ string-size +gvalue-size+))
 277                do (funcall string-destroy tmp)
 278                (gvalue-unset (sap+ tmp string-size)))
 279               (deallocate-memory params)))
 280         (setf
 281          (slot-value object 'location)
 282          (%gobject-new (type-number-of object))))))
 283
 284   (apply #'call-next-method object initargs))
 285
 286
 287 (defmethod instance-finalizer ((instance gobject))
 288   (let ((location (foreign-location instance)))
 289     #+glib2.8
 290     (if (slot-value (class-of instance) 'instance-slots-p)
 291         #'(lambda ()
 292             #+debug-ref-counting
 293             (format t "Finalizing proxy for 0x~8,'0X~%" (sap-int location))
 294             (remove-cached-instance location)
 295             (%object-remove-toggle-ref location))
 296       #'(lambda ()
 297           #+debug-ref-counting
 298           (format t "Finalizing proxy for 0x~8,'0X~%" (sap-int location))
 299           (remove-cached-instance location)
 300           (%object-unref location)))
 301     #-glib2.8
 302     #'(lambda ()
 303         (remove-cached-instance location)
 304           (%object-unref location))))
 305
 306
 307 (defbinding (%gobject-new "g_object_new") () pointer
 308   (type type-number)
 309   (nil null))
 310
 311 (defbinding (%gobject-newv "g_object_newv") () pointer
 312   (type type-number)
 313   (n-parameters unsigned-int)
 314   (params pointer))
 315
 316
 317
 318 ;;;; Property stuff
 319
 320 (defbinding %object-set-property () nil
 321   (object gobject)
 322   (name string)
 323   (value gvalue))
 324
 325 (defbinding %object-get-property () nil
 326   (object gobject)
 327   (name string)
 328   (value gvalue))
 329
 330 (defbinding %object-notify () nil
 331   (object gobject)
 332   (name string))
 333
 334 (defbinding object-freeze-notify () nil
 335   (object gobject))
 336
 337 (defbinding object-thaw-notify () nil
 338   (object gobject))
 339
 340
 341 ;;;; User data
 342
 343 (defbinding %object-set-qdata-full () nil
 344   (object gobject)
 345   (id quark)
 346   (data unsigned-long)
 347   (destroy-marshal pointer))
 348
 349 (defcallback user-data-destroy-func (nil (id unsigned-int))
 350   (destroy-user-data id))
 351
 352 (export 'user-data-destroy-func)
 353
 354 (defun (setf user-data) (data object key)
 355   (%object-set-qdata-full object (quark-intern key)
 356    (register-user-data data) (callback user-data-destroy-func))
 357   data)
 358
 359 ;; deprecated
 360 (defun (setf object-data) (data object key &key (test #'eq))
 361   (assert (eq test #'eq))
 362   (setf (user-data object key) data))
 363
 364 (defbinding %object-get-qdata () unsigned-long
 365   (object gobject)
 366   (id quark))
 367
 368 (defun user-data (object key)
 369   (find-user-data (%object-get-qdata object (quark-intern key))))
 370
 371 ;; deprecated
 372 (defun object-data (object key &key (test #'eq))
 373   (assert (eq test #'eq))
 374   (user-data object key))
 375
 376 (defun user-data-p (object key)
 377   (user-data-exists-p (%object-get-qdata object (quark-intern key))))
 378
 379 (defbinding %object-steal-qdata () unsigned-long
 380   (object gobject)
 381   (id quark))
 382
 383 (defun unset-user-data (object key)
 384   (destroy-user-data (%object-steal-qdata object (quark-intern key))))
 385
 386
 387 ;;;;
 388
 389 (defbinding %object-class-list-properties () pointer
 390   (class pointer)
 391   (n-properties unsigned-int :out))
 392
 393
 394 (defun %map-params (params length type inherited-p)
 395   (if inherited-p
 396       (map-c-vector 'list #'identity params 'param length)
 397     (let ((properties ()))
 398       (map-c-vector 'list
 399        #'(lambda (param)
 400            (when (eql (param-owner-type param) type)
 401              (push param properties)))
 402        params 'param length)
 403       (nreverse properties))))
 404
 405 (defun query-object-class-properties (type &optional inherited-p)
 406   (let* ((type-number (find-type-number type t))
 407          (class (type-class-ref type-number)))
 408     (unwind-protect
 409          (multiple-value-bind (array length)
 410              (%object-class-list-properties class)
 411            (unless (null-pointer-p array)
 412              (unwind-protect
 413                  (%map-params array length type-number inherited-p)
 414                (deallocate-memory array))))
 415 ;      (type-class-unref type-number)
 416       )))
 417
 418
 419 (defun default-slot-name (name)
 420   (intern (substitute #\- #\_ (string-upcase (string-upcase name)))))
 421
 422 (defun default-slot-accessor (class-name slot-name type)
 423   (intern
 424    (format
 425     nil "~A-~A~A" class-name slot-name
 426     (if (eq type 'boolean) "-P" ""))))
 427
 428
 429 (defun slot-definition-from-property (class property &optional slot-name args)
 430   (with-slots (name flags value-type documentation) property
 431     (let* ((slot-name (or slot-name (default-slot-name name)))
 432            (slot-type (or (getf args :type) (type-from-number value-type) 'pointer))
 433            (accessor (default-slot-accessor class slot-name slot-type)))
 434
 435       `(,slot-name
 436         :allocation :property :pname ,name
 437
 438         ,@(when (find :unbound args) (list :unbound (getf args :unbound)))
 439         ,@(when (find :getter args) (list :getter (getf args :getter)))
 440         ,@(when (find :setter args) (list :setter (getf args :setter)))
 441
 442         ;; accessors
 443         ,@(cond
 444            ((and
 445              (member :writable flags) (member :readable flags)
 446              (not (member :construct-only flags)))
 447             (list :accessor accessor))
 448            ((and (member :writable flags) (not (member :construct-only flags)))
 449             (list :writer `(setf ,accessor)))
 450            ((member :readable flags)
 451             (list :reader accessor)))
 452
 453         ;; readable/writable/construct
 454         ,@(when (or (not (member :writable flags))
 455                     (member :construct-only flags))
 456             '(:writable nil))
 457         ,@(when (not (member :readable flags))
 458             '(:readable nil))
 459         ,@(when (or (member :construct flags)
 460                     (member :construct-only flags))
 461             '(:construct t))
 462
 463         ;; initargs
 464         ,@(if (find :initarg args)
 465               (let ((initarg (getf args :initarg)))
 466                 (etypecase initarg
 467                   (null ())
 468                   (symbol `(:initarg ,initarg))))
 469             (when (or (member :construct flags)
 470                       (member :construct-only flags)
 471                       (member :writable flags))
 472               (list :initarg (intern (string slot-name) "KEYWORD"))))
 473
 474         :type ,slot-type
 475         :documentation ,documentation))))
 476
 477
 478 (defun slot-definitions (class properties slots)
 479   (loop
 480    for property in properties
 481    as slot = (or
 482               (find (param-name property) slots
 483                :key #'(lambda (slot) (getf (rest slot) :pname))
 484                :test #'string=)
 485               (find (param-name property) slots
 486                :key #'first :test #'string-equal))
 487    do (cond
 488        ((not slot)
 489         (push (slot-definition-from-property class property) slots))
 490        ((getf (rest slot) :merge)
 491         (setf
 492          (rest slot)
 493          (rest (slot-definition-from-property class property (first slot) (rest slot)))))))
 494   (delete-if #'(lambda (slot) (getf (rest slot) :ignore)) slots))
 495
 496
 497 (defun expand-gobject-type (type forward-p options &optional (metaclass 'gobject-class))
 498   (let ((supers (cons (supertype type) (implements type)))
 499         (class  (type-from-number type))
 500         (slots (getf options :slots)))
 501     `(defclass ,class ,supers
 502          ,(unless forward-p
 503             (slot-definitions class (query-object-class-properties type) slots))
 504          (:metaclass ,metaclass)
 505          (:gtype ,(register-type-as type)))))
 506
 507 (defun gobject-dependencies (type)
 508   (delete-duplicates
 509    (cons
 510     (supertype type)
 511     (append
 512      (type-interfaces type)
 513      (mapcar #'param-value-type (query-object-class-properties type))))))
 514
 515
 516 (register-derivable-type 'gobject "GObject" 'expand-gobject-type 'gobject-dependencies)
 517
 518
 519 ;;; Pseudo type for gobject instances which have their reference count
 520 ;;; increased by the returning function
 521
 522 (defmethod alien-type ((type (eql 'referenced)) &rest args)
 523   (declare (ignore type args))
 524   (alien-type 'gobject))
 525
 526 (defmethod from-alien-form (form (type (eql 'referenced)) &rest args)
 527   (declare (ignore type))
 528   (destructuring-bind (type) args
 529     (if (subtypep type 'gobject)
 530         (let ((instance (make-symbol "INSTANCE")))
 531           `(let ((,instance ,(from-alien-form form type)))
 532              (when ,instance
 533                (%object-unref (foreign-location ,instance)))
 534              ,instance))
 535       (error "~A is not a subclass of GOBJECT" type))))
 536
 537 (export 'referenced)