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Copy patheventbinding.cs
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132 lines (97 loc) · 4.5 KB
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// ==========================================================================
// This software is subject to the provisions of the Zope Public License,
// Version 2.0 (ZPL). A copy of the ZPL should accompany this distribution.
// THIS SOFTWARE IS PROVIDED "AS IS" AND ANY AND ALL EXPRESS OR IMPLIED
// WARRANTIES ARE DISCLAIMED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
// WARRANTIES OF TITLE, MERCHANTABILITY, AGAINST INFRINGEMENT, AND FITNESS
// FOR A PARTICULAR PURPOSE.
// ==========================================================================
using System;
namespace Python.Runtime {
//========================================================================
// Implements a Python event binding type, similar to a method binding.
//========================================================================
internal class EventBinding : ExtensionType {
EventObject e;
IntPtr target;
public EventBinding(EventObject e, IntPtr target) : base() {
Runtime.Incref(target);
this.target = target;
this.e = e;
}
//====================================================================
// EventBinding += operator implementation.
//====================================================================
public static IntPtr nb_inplace_add(IntPtr ob, IntPtr arg) {
EventBinding self = (EventBinding)GetManagedObject(ob);
if (Runtime.PyCallable_Check(arg) < 1) {
Exceptions.SetError(Exceptions.TypeError,
"event handlers must be callable"
);
return IntPtr.Zero;
}
if(!self.e.AddEventHandler(self.target, arg)) {
return IntPtr.Zero;
}
Runtime.Incref(self.pyHandle);
return self.pyHandle;
}
//====================================================================
// EventBinding -= operator implementation.
//====================================================================
public static IntPtr nb_inplace_subtract(IntPtr ob, IntPtr arg) {
EventBinding self = (EventBinding)GetManagedObject(ob);
if (Runtime.PyCallable_Check(arg) < 1) {
Exceptions.SetError(Exceptions.TypeError,
"invalid event handler"
);
return IntPtr.Zero;
}
if (!self.e.RemoveEventHandler(self.target, arg)) {
return IntPtr.Zero;
}
Runtime.Incref(self.pyHandle);
return self.pyHandle;
}
//====================================================================
// EventBinding __hash__ implementation.
//====================================================================
public static IntPtr tp_hash(IntPtr ob) {
EventBinding self = (EventBinding)GetManagedObject(ob);
long x = 0;
long y = 0;
if (self.target != IntPtr.Zero) {
x = Runtime.PyObject_Hash(self.target).ToInt64();
if (x == -1) {
return new IntPtr(-1);
}
}
y = Runtime.PyObject_Hash(self.e.pyHandle).ToInt64();
if (y == -1) {
return new IntPtr(-1);
}
x ^= y;
if (x == -1) {
x = -1;
}
return new IntPtr(x);
}
//====================================================================
// EventBinding __repr__ implementation.
//====================================================================
public static IntPtr tp_repr(IntPtr ob) {
EventBinding self = (EventBinding)GetManagedObject(ob);
string type = (self.target == IntPtr.Zero) ? "unbound" : "bound";
string s = String.Format("<{0} event '{1}'>", type, self.e.name);
return Runtime.PyString_FromString(s);
}
//====================================================================
// EventBinding dealloc implementation.
//====================================================================
public static new void tp_dealloc(IntPtr ob) {
EventBinding self = (EventBinding)GetManagedObject(ob);
Runtime.Decref(self.target);
ExtensionType.FinalizeObject(self);
}
}
}