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------------------------------------------------------------------------------
-- G P S --
-- --
-- Copyright (C) 2013-2018, AdaCore --
-- --
-- This is free software; you can redistribute it and/or modify it under --
-- terms of the GNU General Public License as published by the Free Soft- --
-- ware Foundation; either version 3, or (at your option) any later ver- --
-- sion. This software is distributed in the hope that it will be useful, --
-- but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHAN- --
-- TABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public --
-- License for more details. You should have received a copy of the GNU --
-- General Public License distributed with this software; see file --
-- COPYING3. If not, go to http://www.gnu.org/licenses for a complete copy --
-- of the license. --
------------------------------------------------------------------------------
package body GPS.Scripts is
type Ownership_Mode is (Ada_Owns_Python, Python_Owns_Ada);
------------
-- Create --
------------
function Create
(Kernel : GPS.Core_Kernels.Core_Kernel)
return Kernel_Scripts_Repository is
begin
return (Scripts_Repository_Record with Kernel => Kernel);
end Create;
----------------
-- Get_Kernel --
----------------
function Get_Kernel
(Data : GNATCOLL.Scripts.Callback_Data'Class)
return GPS.Core_Kernels.Core_Kernel is
begin
return Kernel_Scripts_Repository (Get_Repository (Data).all).Kernel;
end Get_Kernel;
----------------
-- Get_Kernel --
----------------
function Get_Kernel
(Script : access GNATCOLL.Scripts.Scripting_Language_Record'Class)
return GPS.Core_Kernels.Core_Kernel is
begin
return Kernel_Scripts_Repository (Get_Repository (Script).all).Kernel;
end Get_Kernel;
----------
-- Free --
----------
procedure Free (Self : in out Script_Proxy) is
C : Inst_Cursor := First (Self.Instances);
begin
-- Severe the connection between instances and Ada object
while Has_Element (C) loop
Unset_Data
(Element (Self.Instances, C),
Script_Proxy'Class (Self).Class_Name);
Next (Self.Instances, C);
end loop;
-- Unref all instances (and possibly destroy them). Also
-- release memory on the Ada side.
Free (Self.Instances);
end Free;
--------------------
-- Script_Proxies --
--------------------
package body Script_Proxies is
type Element_Properties_Record is new Instance_Property_Record with
record
Element : Element_Type;
Ownership : Ownership_Mode;
end record;
overriding procedure Destroy (Prop : in out Element_Properties_Record);
-------------
-- Destroy --
-------------
overriding procedure Destroy
(Prop : in out Element_Properties_Record) is
begin
if Prop.Ownership = Python_Owns_Ada then
Free (Prop.Element);
end if;
end Destroy;
----------------------------
-- Get_Or_Create_Instance --
----------------------------
function Get_Or_Create_Instance
(Self : in out Proxy'Class;
Obj : Element_Type;
Script : not null access Scripting_Language_Record'Class;
Class_To_Create : String := "")
return Class_Instance
is
C : Class_Instance := Get (Self.Instances, Script);
begin
if C = No_Class_Instance then
-- This assumes the class has already been declared with its
-- proper base classes.
C := New_Instance
(Script, New_Class (Script.Get_Repository,
(if Class_To_Create = "" then Self.Class_Name
else Class_To_Create)));
Store_In_Instance (Self, C, Obj);
end if;
return C;
end Get_Or_Create_Instance;
-----------------------
-- Store_In_Instance --
-----------------------
procedure Store_In_Instance
(Self : in out Proxy'Class;
Inst : Class_Instance;
Obj : Element_Type) is
begin
Set_Data
(Inst, Self.Class_Name,
Element_Properties_Record'
(Element => Obj,
Ownership => Ada_Owns_Python));
Set (Self.Instances, Inst);
end Store_In_Instance;
-----------------
-- Has_Element --
-----------------
function Has_Element (Inst : Class_Instance) return Boolean is
P : Proxy; -- Only to retrieve class name
Data : constant Instance_Property := Get_Data (Inst, P.Class_Name);
begin
return Data /= null;
end Has_Element;
-------------------
-- From_Instance --
-------------------
function From_Instance (Inst : Class_Instance) return Element_Type is
P : Proxy; -- Only to retrieve class name
Data : constant Instance_Property := Get_Data (Inst, P.Class_Name);
begin
if Data = null then
raise No_Data_Set_For_Instance with
"No Ada object associated with python " & P.Class_Name
& " instance";
end if;
return Element_Properties_Record (Data.all).Element;
end From_Instance;
------------------------
-- Transfer_Ownership --
------------------------
function Transfer_Ownership
(Self : in out Proxy'Class) return Instances_Status
is
Found : Boolean := False;
C : Inst_Cursor := First (Self.Instances);
Detached : Element_Type;
begin
while Has_Element (C) loop
if not Found then
Detached := Detach
(From_Instance (Element (Self.Instances, C)));
Found := True;
end if;
Set_Data
(Element (Self.Instances, C),
Self.Class_Name,
Element_Properties_Record'
(Element => Detached,
Ownership => Python_Owns_Ada));
Next (Self.Instances, C);
end loop;
Free (Self.Instances);
if Found then
return Has_Instances;
else
return Has_No_Instances;
end if;
end Transfer_Ownership;
end Script_Proxies;
end GPS.Scripts;
|
