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 1.16 2004-11-03 16:18:16 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     (:copy %object-ref)
  29     (:free %object-unref)))
  30
  31
  32 (defmethod initialize-instance ((object gobject) &rest initargs)
  33   (let ((slotds (class-slots (class-of object)))
  34         (names (make-array 0 :adjustable t :fill-pointer t))
  35         (values (make-array 0 :adjustable t :fill-pointer t)))
  36
  37     (loop
  38      as tmp = initargs then (cddr tmp) while tmp
  39      as key = (first tmp)
  40      as value = (second tmp)
  41      as slotd = (find-if
  42                  #'(lambda (slotd)
  43                      (member key (slot-definition-initargs slotd)))
  44                  slotds)
  45      when (and (typep slotd 'effective-property-slot-definition)
  46                (slot-value slotd 'construct))
  47      do (let ((type (find-type-number (slot-definition-type slotd))))
  48           (vector-push-extend (slot-definition-pname slotd) names)
  49           (vector-push-extend (gvalue-new type value) values)
  50           (remf initargs key)))
  51
  52     (setf
  53      (slot-value object 'location)
  54      (if (zerop (length names))
  55          (%gobject-new (type-number-of object))
  56        (%gobject-newvv (type-number-of object) (length names) names values)))
  57
  58 ;    (map 'nil #'gvalue-free values)
  59     )
  60
  61   (%object-weak-ref object)
  62   (apply #'call-next-method object initargs))
  63
  64
  65 (defmethod initialize-proxy ((object gobject) &rest initargs &key weak-ref)
  66   (declare (ignore initargs))
  67   (call-next-method)
  68   (%object-weak-ref object)
  69   (unless weak-ref
  70     (object-ref object)))
  71
  72 (def-callback weak-notify (void (data int) (location system-area-pointer))
  73   (when (instance-cached-p location)
  74     (warn "~A being finalized by the GObject system while still in existence in lisp" (find-cached-instance location))
  75     (remove-cached-instance location)))
  76
  77 (defbinding %object-weak-ref (object) nil
  78   (object gobject)
  79   ((callback weak-notify) pointer)
  80   (0 unsigned-int))
  81
  82
  83 (defbinding (%gobject-new "g_object_new") () pointer
  84   (type type-number)
  85   (nil null))
  86
  87 (defbinding (%gobject-newvv "g_object_newvv") () pointer
  88   (type type-number)
  89   (n-parameters unsigned-int)
  90   (names (vector string))
  91   (values (vector gvalue)))
  92
  93
  94 (defbinding %object-ref (type location) pointer
  95   (location pointer))
  96
  97  (defbinding %object-unref (type location) nil
  98    (location pointer))
  99
 100 (defun object-ref (object)
 101   (%object-ref nil (proxy-location object)))
 102
 103 (defun object-unref (object)
 104   (%object-unref nil (proxy-location object)))
 105
 106
 107
 108 ;;;; Property stuff
 109
 110 (defbinding %object-set-property () nil
 111   (object gobject)
 112   (name string)
 113   (value gvalue))
 114
 115 (defbinding %object-get-property () nil
 116   (object gobject)
 117   (name string)
 118   (value gvalue))
 119
 120 (defbinding %object-notify () nil
 121   (object gobject)
 122   (name string))
 123
 124 (defbinding object-freeze-notify () nil
 125   (object gobject))
 126
 127 (defbinding object-thaw-notify () nil
 128   (object gobject))
 129
 130 (defbinding %object-set-qdata-full () nil
 131   (object gobject)
 132   (id quark)
 133   (data unsigned-long)
 134   (destroy-marshal pointer))
 135
 136
 137 ;;;; User data
 138
 139 (defun (setf object-data) (data object key &key (test #'eq))
 140   (%object-set-qdata-full
 141    object (quark-from-object key :test test)
 142    (register-user-data data) (callback %destroy-user-data))
 143   data)
 144
 145 (defbinding %object-get-qdata () unsigned-long
 146   (object gobject)
 147   (id quark))
 148
 149 (defun object-data (object key &key (test #'eq))
 150   (find-user-data
 151    (%object-get-qdata object (quark-from-object key :test test))))
 152
 153
 154
 155 ;;;; Metaclass used for subclasses of gobject
 156
 157 (eval-when (:compile-toplevel :load-toplevel :execute)
 158   (defclass gobject-class (ginstance-class)
 159     ())
 160
 161   (defclass direct-property-slot-definition (direct-virtual-slot-definition)
 162     ((pname :reader slot-definition-pname :initarg :pname)
 163      (readable :initform t :reader slot-readable-p :initarg :readable)
 164      (writable :initform t :reader slot-writable-p :initarg :writable)
 165      (construct :initform nil :initarg :construct)))
 166
 167   (defclass effective-property-slot-definition (effective-virtual-slot-definition)
 168     ((pname :reader slot-definition-pname :initarg :pname)
 169      (readable :reader slot-readable-p :initarg :readable)
 170      (writable :reader slot-writable-p :initarg :writable)
 171      (construct :initarg :construct))))
 172
 173
 174
 175 ; (defbinding object-class-install-param () nil
 176 ;   (class pointer)
 177 ;   (id unsigned-int)
 178 ;   (parameter parameter))
 179
 180 ; (defbinding object-class-find-param-spec () parameter
 181 ;   (class pointer)
 182 ;   (name string))
 183
 184 (defun signal-name-to-string (name)
 185   (substitute #\_ #\- (string-downcase (string name))))
 186
 187
 188 (defmethod direct-slot-definition-class ((class gobject-class) &rest initargs)
 189   (case (getf initargs :allocation)
 190     (:property (find-class 'direct-property-slot-definition))
 191     (t (call-next-method))))
 192
 193 (defmethod effective-slot-definition-class ((class gobject-class) &rest initargs)
 194   (case (getf initargs :allocation)
 195     (:property (find-class 'effective-property-slot-definition))
 196     (t (call-next-method))))
 197
 198 (defmethod compute-effective-slot-definition-initargs ((class gobject-class) direct-slotds)
 199   (if (eq (most-specific-slot-value direct-slotds 'allocation) :property)
 200       (nconc
 201        (list :pname (signal-name-to-string
 202                      (most-specific-slot-value direct-slotds 'pname))
 203              :readable (most-specific-slot-value direct-slotds 'readable)
 204              :writable (most-specific-slot-value direct-slotds 'writable)
 205              :construct (most-specific-slot-value direct-slotds 'construct))
 206        (call-next-method))
 207     (call-next-method)))
 208
 209
 210 (defmethod initialize-internal-slot-functions ((slotd effective-property-slot-definition))
 211   (let* ((type (slot-definition-type slotd))
 212          (pname (slot-definition-pname slotd))
 213          (type-number (find-type-number type)))
 214     (unless (slot-boundp slotd 'reader-function)
 215       (setf
 216        (slot-value slotd 'reader-function)
 217        (if (slot-readable-p slotd)
 218            #'(lambda (object)
 219                (with-gc-disabled
 220                    (let ((gvalue (gvalue-new type-number)))
 221                      (%object-get-property object pname gvalue)
 222                      (unwind-protect
 223                           (funcall
 224                            (intern-reader-function (type-from-number type-number)) gvalue +gvalue-value-offset+) ; temporary workaround for wrong topological sorting of types
 225                        (gvalue-free gvalue t)))))
 226            #'(lambda (value object)
 227                (error "Slot is not readable: ~A" (slot-definition-name slotd))))))
 228
 229     (unless (slot-boundp slotd 'writer-function)
 230       (setf
 231        (slot-value slotd 'writer-function)
 232        (if (slot-writable-p slotd)
 233            #'(lambda (value object)
 234                (with-gc-disabled
 235                    (let ((gvalue (gvalue-new type-number)))
 236                      (funcall
 237                       (intern-writer-function (type-from-number type-number)) ; temporary
 238                       value gvalue +gvalue-value-offset+)
 239                      (%object-set-property object pname gvalue)
 240                      (funcall
 241                       (intern-destroy-function (type-from-number type-number)) ; temporary
 242                       gvalue +gvalue-value-offset+)
 243                      (gvalue-free gvalue nil)
 244                      value)))
 245            #'(lambda (value object)
 246                (error "Slot is not writable: ~A" (slot-definition-name slotd))))))
 247
 248     (unless (slot-boundp slotd 'boundp-function)
 249       (setf
 250        (slot-value slotd 'boundp-function)
 251        #'(lambda (object)
 252            (declare (ignore object))
 253            t))))
 254   (call-next-method))
 255
 256
 257 (defmethod validate-superclass ((class gobject-class)
 258                                 (super pcl::standard-class))
 259 ;  (subtypep (class-name super) 'gobject)
 260   t)
 261
 262
 263
 264 ;;;;
 265
 266 (defbinding %object-class-list-properties () pointer
 267   (class pointer)
 268   (n-properties unsigned-int :out))
 269
 270
 271 (defun %map-params (params length type inherited-p)
 272   (if inherited-p
 273       (map-c-array 'list #'identity params 'param length)
 274     (let ((properties ()))
 275       (map-c-array 'list
 276        #'(lambda (param)
 277            (when (eql (param-owner-type param) type)
 278              (push param properties)))
 279        params 'param length)
 280       (nreverse properties))))
 281
 282 (defun query-object-class-properties (type &optional inherited-p)
 283   (let* ((type-number (find-type-number type))
 284          (class (type-class-ref type-number)))
 285     (unwind-protect
 286          (multiple-value-bind (array length)
 287              (%object-class-list-properties class)
 288            (unwind-protect
 289                 (%map-params array length type-number inherited-p)
 290              (deallocate-memory array)))
 291 ;      (type-class-unref type-number)
 292       )))
 293
 294
 295 (defun default-slot-name (name)
 296   (intern (substitute #\- #\_ (string-upcase (string-upcase name)))))
 297
 298 (defun default-slot-accessor (class-name slot-name type)
 299   (intern
 300    (format
 301     nil "~A-~A~A" class-name slot-name
 302     (if (eq type 'boolean) "-P" ""))))
 303
 304
 305 (defun slot-definition-from-property (class property)
 306   (with-slots (name flags value-type documentation) property
 307     (let* ((slot-name (default-slot-name name))
 308            (slot-type (or (type-from-number value-type) value-type))
 309            (accessor (default-slot-accessor class slot-name slot-type)))
 310
 311       `(,slot-name
 312         :allocation :property :pname ,name
 313
 314         ;; accessors
 315         ,@(cond
 316            ((and
 317              (member :writable flags) (member :readable flags)
 318              (not (member :construct-only flags)))
 319             (list :accessor accessor))
 320            ((and (member :writable flags) (not (member :construct-only flags)))
 321             (list :writer `(setf ,accessor)))
 322            ((member :readable flags)
 323             (list :reader accessor)))
 324
 325         ;; readable/writable/construct
 326         ,@(when (or (not (member :writable flags))
 327                     (member :construct-only flags))
 328             '(:writable nil))
 329         ,@(when (not (member :readable flags))
 330             '(:readable nil))
 331         ,@(when (or (member :construct flags)
 332                     (member :construct-only flags))
 333             '(:construct t))
 334
 335         ;; initargs
 336         ,@(when (or (member :construct flags)
 337                     (member :construct-only flags)
 338                     (member :writable flags))
 339             (list :initarg (intern (string slot-name) "KEYWORD")))
 340
 341         :type ,slot-type
 342         :documentation ,documentation))))
 343
 344
 345 (defun slot-definitions (class properties slots)
 346   (loop
 347    with manual-slots = slots
 348    for property in properties
 349    unless (find-if
 350            #'(lambda (slot)
 351                (destructuring-bind (name &rest args) slot
 352                  (or
 353                   (equal (param-name property) (getf args :pname))
 354                   (eq (default-slot-name (param-name property)) name))))
 355            manual-slots)
 356    do (push (slot-definition-from-property class property) slots))
 357   (delete-if #'(lambda (slot) (getf (rest slot) :ignore)) slots))
 358
 359
 360 (defun expand-gobject-type (type &optional options (metaclass 'gobject-class))
 361   (let ((supers (cons (supertype type) (implements type)))
 362         (class  (type-from-number type))
 363         (slots (getf options :slots)))
 364     `(defclass ,class ,supers
 365       ,(slot-definitions class (query-object-class-properties type) slots)
 366       (:metaclass ,metaclass)
 367       (:alien-name ,(find-type-name type)))))
 368
 369
 370 (register-derivable-type 'gobject "GObject" 'expand-gobject-type)