Added gtype and tests

[cl-gtk2.git] / glib / gobject.type-designator.lisp

diff --git a/glib/gobject.type-designator.lisp b/glib/gobject.type-designator.lisp
index 7cf8bf7..d31af2e 100644 (file)
--- a/glib/gobject.type-designator.lisp
+++ b/glib/gobject.type-designator.lisp
@@ -2,16 +2,104 @@
 
 (defctype g-type gsize)
 
+(defstruct gtype name %id)
+
+(defvar *name-to-gtype* (make-hash-table :test 'equal))
+(defvar *id-to-gtype* (make-hash-table))
+(defvar *gtype-lock* (bt:make-lock "gtype lock"))
+
+(defun invalidate-gtypes ()
+  (bt:with-lock-held (*gtype-lock*)
+    (clrhash *id-to-gtype*)
+    (iter (for (name gtype) in-hashtable *name-to-gtype*)
+          (setf (gtype-%id gtype) nil))))
+
+(at-finalize () (invalidate-gtypes))
+
+(defcfun (%g-type-from-name "g_type_from_name") g-type
+  (name :string))
+
+(defcfun (%g-type-name "g_type_name") (:string :free-from-foreign nil)
+  (type g-type))
+
+(defun gtype-from-name (name)
+  (when (null name) (return-from gtype-from-name nil))
+  (bt:with-lock-held (*gtype-lock*)
+    (let ((type (gethash name *name-to-gtype*)))
+      (when type
+        (when (null (gtype-%id type))
+          (let ((n (%g-type-from-name name)))
+            (if (zerop n)
+                (warn "GType ~A is not known to GObject" name)
+                (progn
+                  (setf (gtype-%id type) n
+                        (gethash n *id-to-gtype*) type)))))
+        (return-from gtype-from-name type)))
+    (let ((n (%g-type-from-name name)))
+      (when (zerop n)
+        (warn "GType ~A is not known to GObject" name)
+        (setf n nil))
+      (let ((type (make-gtype :name (copy-seq name) :%id n)))
+        (setf (gethash n *id-to-gtype*) type
+              (gethash name *name-to-gtype*) type)
+        (return-from gtype-from-name type)))))
+
+(defun gtype-from-id (id)
+  (when (zerop id) (return-from gtype-from-id nil))
+  (bt:with-lock-held (*gtype-lock*)
+    (let ((type (gethash id *id-to-gtype*)))
+      (when type
+        (return-from gtype-from-id type)))
+    (let ((name (%g-type-name id)))
+      (unless name
+        (error "GType with ~A is not known to GObject" id))
+      (let ((type (gethash name *name-to-gtype*)))
+        (when type
+          (setf (gtype-%id type) id
+                (gethash id *id-to-gtype*) type)
+          (return-from gtype-from-id type))
+        (let ((type (make-gtype :name name :%id id)))
+          (setf (gethash id *id-to-gtype*) type
+                (gethash name *name-to-gtype*) type)
+          (return-from gtype-from-id type))))))
+
+(defun gtype-id (gtype)
+  (when (null gtype) (return-from gtype-id 0))
+  (when (gtype-%id gtype) (return-from gtype-id (gtype-%id gtype)))
+  (bt:with-lock-held (*gtype-lock*)
+    (let ((n (%g-type-from-name (gtype-name gtype))))
+      (when (zerop n)
+        (warn "GType ~A is not known to GObject" (gtype-name gtype))
+        (return-from gtype-id 0))
+      (setf (gtype-%id gtype) n
+            (gethash n *id-to-gtype*) gtype)
+      n)))
+
+(defun gtype (thing)
+  (etypecase thing
+    (null nil)
+    (gtype thing)
+    (string (gtype-from-name thing))
+    (integer (gtype-from-id thing))))
+
 (define-foreign-type g-type-designator ()
-  ()
+  ((mangled-p :initarg :mangled-p
+              :reader g-type-designator-mangled-p
+              :initform nil
+              :documentation "Whether the type designator is mangled with G_SIGNAL_TYPE_STATIC_SCOPE flag"))
   (:documentation "Values of this CFFI foreign type identify the GType. GType is designated by a its name (a string) or a numeric identifier. Functions accept GType designators as a string or integer and return them as a string. Functions @fun{g-type-name} and @fun{g-type-from-name} are used to convert between name and numeric identifier.
 
 Numeric identifier of GType may be different between different program runs. But string identifier of GType does not change.")
   (:actual-type g-type)
   (:simple-parser g-type-designator))
 
+(defun unmangle-g-type (g-type)
+  (logxor g-type (ldb (byte 1 0) g-type)));;subtract the G_SIGNAL_TYPE_STATIC_SCOPE
+
 (defmethod translate-from-foreign (value (type g-type-designator))
-  (g-type-name value))
+  (g-type-name (if (g-type-designator-mangled-p type)
+                   (unmangle-g-type value)
+                   value)))
 
 (defmethod translate-to-foreign (value (type g-type-designator))
   (etypecase value
@@ -19,6 +107,18 @@ Numeric identifier of GType may be different between different program runs. But
     (integer value)
     (null 0)))
 
+(defun g-type-numeric (g-type-designator)
+  (etypecase g-type-designator
+    (string (g-type-from-name g-type-designator))
+    (integer g-type-designator)
+    (null 0)))
+
+(defun g-type-string (g-type-designator)
+  (etypecase g-type-designator
+    (string (g-type-name g-type-designator))
+    (integer (g-type-name g-type-designator))
+    (null nil)))
+
 (defcfun (g-type-name "g_type_name") :string
   "Returns the name of a GType.@see{g-type-from-name}
 
@@ -45,4 +145,12 @@ Example:
 }
 @arg[name]{a string - name of GType}
 @return{an integer}"
-  (name :string))
\ No newline at end of file
+  (name :string))
+
+(defun g-type= (type-1 type-2)
+  (= (g-type-numeric type-1)
+     (g-type-numeric type-2)))
+
+(defun g-type/= (type-1 type-2)
+  (/= (g-type-numeric type-1)
+      (g-type-numeric type-2)))