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 1.25 2004-12-28 20:29:05 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 (typep (first direct-slotds) 'direct-property-slot-definition)
  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     (when (and (not (slot-boundp slotd 'getter)) (slot-readable-p slotd))
 101       (setf
 102        (slot-value slotd 'getter)
 103        (let ((reader nil))
 104          #'(lambda (object)
 105              (unless reader
 106                (setq reader (reader-function type))) ;(type-from-number type-number))))
 107              (let ((gvalue (gvalue-new type-number)))
 108                (%object-get-property object pname gvalue)
 109                (unwind-protect
 110                  (funcall reader  gvalue +gvalue-value-offset+)
 111                  (gvalue-free gvalue t)))))))
 112
 113     (when (and (not (slot-boundp slotd 'setter)) (slot-writable-p slotd))
 114       (setf
 115        (slot-value slotd 'setter)
 116        (let ((writer nil))
 117          #'(lambda (value object)
 118              (unless writer
 119                (setq writer (writer-function type))) ;(type-from-number type-number))))
 120              (let ((gvalue (gvalue-new type-number)))
 121                (funcall writer value gvalue +gvalue-value-offset+)
 122                (%object-set-property object pname gvalue)
 123                (gvalue-free gvalue t)
 124                value))))))
 125
 126   (call-next-method))
 127
 128
 129 ;;;; Super class for all classes in the GObject type hierarchy
 130
 131 (eval-when (:compile-toplevel :load-toplevel :execute)
 132   (defclass gobject (ginstance)
 133     ()
 134     (:metaclass gobject-class)
 135     (:alien-name "GObject")))
 136
 137
 138 (defun initial-add (object function initargs key pkey)
 139   (loop
 140    as (initarg value . rest) = initargs then rest
 141    do (cond
 142        ((eq initarg key) (funcall function object value))
 143        ((eq initarg pkey) (mapc #'(lambda (value)
 144                                     (funcall function object value))
 145                                 value)))
 146        while rest))
 147
 148 (defun initial-apply-add (object function initargs key pkey)
 149   (initial-add object #'(lambda (object value)
 150                           (apply function object (mklist value)))
 151                initargs key pkey))
 152
 153
 154 (defmethod initialize-instance ((object gobject) &rest initargs)
 155   (unless (slot-boundp object 'location)
 156     ;; Extract initargs which we should pass directly to the GObeject
 157     ;; constructor
 158     (let* ((slotds (class-slots (class-of object)))
 159            (args (when initargs
 160                    (loop
 161                     as (key value . rest) = initargs then rest
 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                     while rest))))
 175       (if args
 176           (let* ((string-size (size-of 'string))
 177                  (string-writer (writer-function 'string))
 178                  (string-destroy (destroy-function 'string))
 179                  (params (allocate-memory
 180                           (* (length args) (+ string-size +gvalue-size+)))))
 181             (loop
 182              for (pname type value) in args
 183              as tmp = params then (sap+ tmp (+ string-size +gvalue-size+))
 184              do (funcall string-writer pname tmp)
 185              (gvalue-init (sap+ tmp string-size) type value))
 186             (unwind-protect
 187                 (setf
 188                  (slot-value object 'location)
 189                  (%gobject-newv (type-number-of object) (length args) params))
 190               (loop
 191                repeat (length args)
 192                as tmp = params then (sap+ tmp (+ string-size +gvalue-size+))
 193                do (funcall string-destroy tmp)
 194                (gvalue-unset (sap+ tmp string-size)))
 195               (deallocate-memory params)))
 196         (setf
 197          (slot-value object 'location)
 198          (%gobject-new (type-number-of object))))))
 199
 200   (apply #'call-next-method object initargs))
 201
 202
 203 (defmethod instance-finalizer ((instance gobject))
 204   (let ((location (proxy-location instance)))
 205     #'(lambda ()
 206         (remove-cached-instance location)
 207         (%object-unref location))))
 208
 209
 210 (defbinding (%gobject-new "g_object_new") () pointer
 211   (type type-number)
 212   (nil null))
 213
 214 (defbinding (%gobject-newv "g_object_newv") () pointer
 215   (type type-number)
 216   (n-parameters unsigned-int)
 217   (params pointer))
 218
 219
 220
 221 ;;;; Property stuff
 222
 223 (defbinding %object-set-property () nil
 224   (object gobject)
 225   (name string)
 226   (value gvalue))
 227
 228 (defbinding %object-get-property () nil
 229   (object gobject)
 230   (name string)
 231   (value gvalue))
 232
 233 (defbinding %object-notify () nil
 234   (object gobject)
 235   (name string))
 236
 237 (defbinding object-freeze-notify () nil
 238   (object gobject))
 239
 240 (defbinding object-thaw-notify () nil
 241   (object gobject))
 242
 243 (defbinding %object-set-qdata-full () nil
 244   (object gobject)
 245   (id quark)
 246   (data unsigned-long)
 247   (destroy-marshal pointer))
 248
 249
 250 ;;;; User data
 251
 252 (defun (setf object-data) (data object key &key (test #'eq))
 253   (%object-set-qdata-full
 254    object (quark-from-object key :test test)
 255    (register-user-data data) (callback %destroy-user-data))
 256   data)
 257
 258 (defbinding %object-get-qdata () unsigned-long
 259   (object gobject)
 260   (id quark))
 261
 262 (defun object-data (object key &key (test #'eq))
 263   (find-user-data
 264    (%object-get-qdata object (quark-from-object key :test test))))
 265
 266
 267 ;;;;
 268
 269 (defbinding %object-class-list-properties () pointer
 270   (class pointer)
 271   (n-properties unsigned-int :out))
 272
 273
 274 (defun %map-params (params length type inherited-p)
 275   (if inherited-p
 276       (map-c-vector 'list #'identity params 'param length)
 277     (let ((properties ()))
 278       (map-c-vector 'list
 279        #'(lambda (param)
 280            (when (eql (param-owner-type param) type)
 281              (push param properties)))
 282        params 'param length)
 283       (nreverse properties))))
 284
 285 (defun query-object-class-properties (type &optional inherited-p)
 286   (let* ((type-number (find-type-number type))
 287          (class (type-class-ref type-number)))
 288     (unwind-protect
 289          (multiple-value-bind (array length)
 290              (%object-class-list-properties class)
 291            (unwind-protect
 292                 (%map-params array length type-number inherited-p)
 293              (deallocate-memory array)))
 294 ;      (type-class-unref type-number)
 295       )))
 296
 297
 298 (defun default-slot-name (name)
 299   (intern (substitute #\- #\_ (string-upcase (string-upcase name)))))
 300
 301 (defun default-slot-accessor (class-name slot-name type)
 302   (intern
 303    (format
 304     nil "~A-~A~A" class-name slot-name
 305     (if (eq type 'boolean) "-P" ""))))
 306
 307
 308 (defun slot-definition-from-property (class property &optional args)
 309   (with-slots (name flags value-type documentation) property
 310     (let* ((slot-name (default-slot-name name))
 311            (slot-type (or (getf args :type) (type-from-number value-type) value-type))
 312            (accessor (default-slot-accessor class slot-name slot-type)))
 313
 314       `(,slot-name
 315         :allocation :property :pname ,name
 316
 317         ,@(cond
 318            ((find :unbound args) (list :unbound (getf args :unbound))))
 319
 320         ;; accessors
 321         ,@(cond
 322            ((and
 323              (member :writable flags) (member :readable flags)
 324              (not (member :construct-only flags)))
 325             (list :accessor accessor))
 326            ((and (member :writable flags) (not (member :construct-only flags)))
 327             (list :writer `(setf ,accessor)))
 328            ((member :readable flags)
 329             (list :reader accessor)))
 330
 331         ;; readable/writable/construct
 332         ,@(when (or (not (member :writable flags))
 333                     (member :construct-only flags))
 334             '(:writable nil))
 335         ,@(when (not (member :readable flags))
 336             '(:readable nil))
 337         ,@(when (or (member :construct flags)
 338                     (member :construct-only flags))
 339             '(:construct t))
 340
 341         ;; initargs
 342         ,@(when (or (member :construct flags)
 343                     (member :construct-only flags)
 344                     (member :writable flags))
 345             (list :initarg (intern (string slot-name) "KEYWORD")))
 346
 347         :type ,slot-type
 348         :documentation ,documentation))))
 349
 350
 351 (defun slot-definitions (class properties slots)
 352   (loop
 353    for property in properties
 354    as slot = (or
 355               (find (param-name property) slots
 356                :key #'(lambda (slot) (getf (rest slot) :pname))
 357                :test #'string=)
 358               (find (param-name property) slots
 359                :key #'first :test #'string-equal))
 360    do (cond
 361        ((not slot)
 362         (push (slot-definition-from-property class property) slots))
 363        ((getf (rest slot) :merge)
 364         (setf
 365          (rest slot)
 366          (rest (slot-definition-from-property class property (rest slot)))))))
 367   (delete-if #'(lambda (slot) (getf (rest slot) :ignore)) slots))
 368
 369
 370 (defun expand-gobject-type (type &optional options (metaclass 'gobject-class))
 371   (let ((supers (cons (supertype type) (implements type)))
 372         (class  (type-from-number type))
 373         (slots (getf options :slots)))
 374     `(defclass ,class ,supers
 375       ,(slot-definitions class (query-object-class-properties type) slots)
 376       (:metaclass ,metaclass)
 377       (:alien-name ,(find-type-name type)))))
 378
 379
 380 (register-derivable-type 'gobject "GObject" 'expand-gobject-type)
 381
 382
 383 ;;; Pseudo type for gobject instances which have their reference count
 384 ;;; increased by the returning function
 385
 386 (defmethod alien-type ((type (eql 'referenced)) &rest args)
 387   (declare (ignore type args))
 388   (alien-type 'gobject))
 389
 390 (defmethod from-alien-form (form (type (eql 'referenced)) &rest args)
 391   (declare (ignore type))
 392   (destructuring-bind (type) args
 393     (if (subtypep type 'gobject)
 394         (let ((instance (make-symbol "INSTANCE")))
 395           `(let ((,instance ,(from-alien-form form type)))
 396              (when ,instance
 397                (%object-unref (proxy-location ,instance)))
 398              ,instance))
 399       (error "~A is not a subclass of GOBJECT" type))))
 400
 401 (export 'referenced)