| 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: genums.lisp,v 1.5 2004/12/19 18:18:05 espen Exp $ |
| 19 | |
| 20 | (in-package "GLIB") |
| 21 | |
| 22 | |
| 23 | (defun %map-enum (args op) |
| 24 | (let ((current-value 0)) |
| 25 | (mapcar |
| 26 | #'(lambda (mapping) |
| 27 | (destructuring-bind (symbol &optional (value current-value)) |
| 28 | (mklist mapping) |
| 29 | (setf current-value (1+ value)) |
| 30 | (case op |
| 31 | (:enum-int (list symbol value)) |
| 32 | (:flags-int (list symbol value)) |
| 33 | (:int-enum (list value symbol)) |
| 34 | (:int-flags (list value symbol)) |
| 35 | (:symbols symbol)))) |
| 36 | args))) |
| 37 | |
| 38 | (defun %query-enum-or-flags-values (query-function class type) |
| 39 | (multiple-value-bind (sap length) |
| 40 | (funcall query-function (type-class-ref type)) |
| 41 | (let ((values nil) |
| 42 | (size (proxy-instance-size (find-class class))) |
| 43 | (proxy (make-instance class :location sap))) |
| 44 | (dotimes (i length) |
| 45 | (with-slots (location nickname value) proxy |
| 46 | (setf location sap) |
| 47 | (setq sap (sap+ sap size)) |
| 48 | (push |
| 49 | (list |
| 50 | (intern (substitute #\- #\_ (string-upcase nickname)) "KEYWORD") |
| 51 | value) |
| 52 | values))) |
| 53 | values))) |
| 54 | |
| 55 | |
| 56 | ;;;; Generic enum type |
| 57 | |
| 58 | (deftype enum (&rest args) |
| 59 | `(member ,@(%map-enum args :symbols))) |
| 60 | |
| 61 | (defmethod alien-type ((type (eql 'enum)) &rest args) |
| 62 | (declare (ignore type args)) |
| 63 | (alien-type 'signed)) |
| 64 | |
| 65 | (defmethod size-of ((type (eql 'enum)) &rest args) |
| 66 | (declare (ignore type args)) |
| 67 | (size-of 'signed)) |
| 68 | |
| 69 | (defmethod to-alien-form (form (type (eql 'enum)) &rest args) |
| 70 | (declare (ignore type)) |
| 71 | `(ecase ,form |
| 72 | ,@(%map-enum args :enum-int))) |
| 73 | |
| 74 | (defmethod from-alien-form (form (type (eql 'enum)) &rest args) |
| 75 | (declare (ignore type)) |
| 76 | `(ecase ,form |
| 77 | ,@(%map-enum args :int-enum))) |
| 78 | |
| 79 | (defmethod to-alien-function ((type (eql 'enum)) &rest args) |
| 80 | (let ((mappings (%map-enum args :enum-int))) |
| 81 | #'(lambda (enum) |
| 82 | (or |
| 83 | (second (assoc enum mappings)) |
| 84 | (error "~S is not of type ~S" enum (cons type args)))))) |
| 85 | |
| 86 | (defmethod from-alien-function ((type (eql 'enum)) &rest args) |
| 87 | (declare (ignore type)) |
| 88 | (let ((mappings (%map-enum args :int-enum))) |
| 89 | #'(lambda (int) |
| 90 | (second (assoc int mappings))))) |
| 91 | |
| 92 | (defmethod writer-function ((type (eql 'enum)) &rest args) |
| 93 | (declare (ignore type)) |
| 94 | (let ((writer (writer-function 'signed)) |
| 95 | (function (apply #'to-alien-function 'enum args))) |
| 96 | #'(lambda (enum location &optional (offset 0)) |
| 97 | (funcall writer (funcall function enum) location offset)))) |
| 98 | |
| 99 | (defmethod reader-function ((type (eql 'enum)) &rest args) |
| 100 | (declare (ignore type)) |
| 101 | (let ((reader (reader-function 'signed)) |
| 102 | (function (apply #'from-alien-function 'enum args))) |
| 103 | #'(lambda (location &optional (offset 0)) |
| 104 | (funcall function (funcall reader location offset))))) |
| 105 | |
| 106 | |
| 107 | |
| 108 | (defclass %enum-value (struct) |
| 109 | ((value :allocation :alien :type int) |
| 110 | (name :allocation :alien :type string) |
| 111 | (nickname :allocation :alien :type string)) |
| 112 | (:metaclass static-struct-class)) |
| 113 | |
| 114 | (defbinding %enum-class-values () pointer |
| 115 | (class pointer) |
| 116 | (n-values unsigned-int :out)) |
| 117 | |
| 118 | (defun query-enum-values (type) |
| 119 | (%query-enum-or-flags-values #'%enum-class-values '%enum-value type)) |
| 120 | |
| 121 | (defun enum-int (enum type) |
| 122 | (funcall (to-alien-function type) enum)) |
| 123 | |
| 124 | (defun int-enum (int type) |
| 125 | (funcall (from-alien-function type) int)) |
| 126 | |
| 127 | (defun enum-mapping (type) |
| 128 | (rest (type-expand-to 'enum type))) |
| 129 | |
| 130 | ;;;; Generic flags type |
| 131 | |
| 132 | (deftype flags (&rest args) |
| 133 | `(or null (cons (member ,@(%map-enum args :symbols)) list))) |
| 134 | |
| 135 | (defmethod alien-type ((type (eql 'flags)) &rest args) |
| 136 | (declare (ignore type args)) |
| 137 | (alien-type 'unsigned)) |
| 138 | |
| 139 | (defmethod size-of ((type (eql 'flags)) &rest args) |
| 140 | (declare (ignore type args)) |
| 141 | (size-of 'unsigned)) |
| 142 | |
| 143 | (defmethod to-alien-form (flags (type (eql 'flags)) &rest args) |
| 144 | `(loop |
| 145 | with value = 0 |
| 146 | with flags = ,flags |
| 147 | for flag in (mklist flags) |
| 148 | do (let ((flagval |
| 149 | (or |
| 150 | (second (assoc flag ',(%map-enum args :flags-int))) |
| 151 | (error "~S is not of type ~S" flags '(,type ,@args))))) |
| 152 | (setq value (logior value flagval))) |
| 153 | finally (return value))) |
| 154 | |
| 155 | (defmethod from-alien-form (int (type (eql 'flags)) &rest args) |
| 156 | (declare (ignore type)) |
| 157 | `(loop |
| 158 | for mapping in ',(%map-enum args :int-flags) |
| 159 | unless (zerop (logand int (first mapping))) |
| 160 | collect (second mapping))) |
| 161 | |
| 162 | (defmethod to-alien-function ((type (eql 'flags)) &rest args) |
| 163 | (let ((mappings (%map-enum args :flags-int))) |
| 164 | #'(lambda (flags) |
| 165 | (loop |
| 166 | with value = 0 |
| 167 | for flag in (mklist flags) |
| 168 | do (let ((flagval (or |
| 169 | (second (assoc flag mappings)) |
| 170 | (error "~S is not of type ~S" flags (cons type args))))) |
| 171 | (setq value (logior value flagval))) |
| 172 | finally (return value))))) |
| 173 | |
| 174 | (defmethod from-alien-function ((type (eql 'flags)) &rest args) |
| 175 | (declare (ignore type)) |
| 176 | (let ((mappings (%map-enum args :int-flags))) |
| 177 | #'(lambda (int) |
| 178 | (loop |
| 179 | for mapping in mappings |
| 180 | unless (zerop (logand int (first mapping))) |
| 181 | collect (second mapping))))) |
| 182 | |
| 183 | (defmethod writer-function ((type (eql 'flags)) &rest args) |
| 184 | (declare (ignore type)) |
| 185 | (let ((writer (writer-function 'unsigned)) |
| 186 | (function (apply #'to-alien-function 'flags args))) |
| 187 | #'(lambda (flags location &optional (offset 0)) |
| 188 | (funcall writer (funcall function flags) location offset)))) |
| 189 | |
| 190 | (defmethod reader-function ((type (eql 'flags)) &rest args) |
| 191 | (declare (ignore type)) |
| 192 | (let ((reader (reader-function 'unsigned)) |
| 193 | (function (apply #'from-alien-function 'flags args))) |
| 194 | #'(lambda (location &optional (offset 0)) |
| 195 | (funcall function (funcall reader location offset))))) |
| 196 | |
| 197 | |
| 198 | |
| 199 | (defclass %flags-value (struct) |
| 200 | ((value :allocation :alien :type unsigned-int) |
| 201 | (name :allocation :alien :type string) |
| 202 | (nickname :allocation :alien :type string)) |
| 203 | (:metaclass static-struct-class)) |
| 204 | |
| 205 | (defbinding %flags-class-values () pointer |
| 206 | (class pointer) |
| 207 | (n-values unsigned-int :out)) |
| 208 | |
| 209 | (defun query-flags-values (type) |
| 210 | (%query-enum-or-flags-values #'%flags-class-values '%flags-value type)) |
| 211 | |
| 212 | |
| 213 | |
| 214 | ;;;; |
| 215 | |
| 216 | (defun expand-enum-type (type-number &optional options) |
| 217 | (let* ((super (supertype type-number)) |
| 218 | (type (type-from-number type-number)) |
| 219 | (mappings (getf options :mappings)) |
| 220 | (expanded-mappings |
| 221 | (append |
| 222 | (delete-if |
| 223 | #'(lambda (mapping) |
| 224 | (or |
| 225 | (assoc (first mapping) mappings) |
| 226 | (rassoc (cdr mapping) mappings :test #'equal))) |
| 227 | (if (eq super 'enum) |
| 228 | (query-enum-values type-number) |
| 229 | (query-flags-values type-number))) |
| 230 | (remove-if |
| 231 | #'(lambda (mapping) (eq (second mapping) nil)) mappings)))) |
| 232 | `(progn |
| 233 | (register-type ',type ,(find-type-name type-number)) |
| 234 | (deftype ,type () '(,super ,@expanded-mappings))))) |
| 235 | |
| 236 | |
| 237 | (register-derivable-type 'enum "GEnum" 'expand-enum-type) |
| 238 | (register-derivable-type 'flags "GFlags" 'expand-enum-type) |
| 239 | |