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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#ifndef _a11yGeneric_H_
#define _a11yGeneric_H_
#include "nsThreadUtils.h"
// What we want is: NS_INTERFACE_MAP_ENTRY(self) for static IID accessors,
// but some of our classes have an ambiguous base class of nsISupports which
// prevents this from working (the default macro converts it to nsISupports,
// then addrefs it, then returns it). Therefore, we expand the macro here and
// change it so that it works. Yuck.
#define NS_INTERFACE_MAP_STATIC_AMBIGUOUS(_class) \
if (aIID.Equals(NS_GET_IID(_class))) { \
NS_ADDREF(this); \
*aInstancePtr = this; \
return NS_OK; \
} else
#define NS_ENSURE_A11Y_SUCCESS(res, ret) \
PR_BEGIN_MACRO \
nsresult __rv = res; /* Don't evaluate |res| more than once */ \
if (NS_FAILED(__rv)) { \
NS_ENSURE_SUCCESS_BODY(res, ret) \
return ret; \
} \
if (__rv == NS_OK_DEFUNCT_OBJECT) \
return ret; \
PR_END_MACRO
////////////////////////////////////////////////////////////////////////////////
// nsRunnable helpers
////////////////////////////////////////////////////////////////////////////////
/**
* Use NS_DECL_RUNNABLEMETHOD_ macros to declare a runnable class for the given
* method of the given class. There are three macros:
* NS_DECL_RUNNABLEMETHOD(Class, Method)
* NS_DECL_RUNNABLEMETHOD_ARG1(Class, Method, Arg1Type)
* NS_DECL_RUNNABLEMETHOD_ARG2(Class, Method, Arg1Type, Arg2Type)
* Note Arg1Type and Arg2Type must be types which keeps the objects alive.
*
* Use NS_DISPATCH_RUNNABLEMETHOD_ macros to create an instance of declared
* runnable class and dispatch it to main thread. Availabe macros are:
* NS_DISPATCH_RUNNABLEMETHOD(Method, Object)
* NS_DISPATCH_RUNNABLEMETHOD_ARG1(Method, Object, Arg1)
* NS_DISPATCH_RUNNABLEMETHOD_ARG2(Method, Object, Arg1, Arg2)
*/
#define NS_DECL_RUNNABLEMETHOD_HELPER(ClassType, Method) \
void Revoke() \
{ \
NS_IF_RELEASE(mObj); \
} \
\
protected: \
virtual ~nsRunnableMethod_##Method() \
{ \
NS_IF_RELEASE(mObj); \
} \
\
private: \
ClassType *mObj; \
#define NS_DECL_RUNNABLEMETHOD(ClassType, Method) \
class nsRunnableMethod_##Method : public nsRunnable \
{ \
public: \
nsRunnableMethod_##Method(ClassType *aObj) : mObj(aObj) \
{ \
NS_IF_ADDREF(mObj); \
} \
\
NS_IMETHODIMP Run() \
{ \
if (!mObj) \
return NS_OK; \
(mObj-> Method)(); \
return NS_OK; \
} \
\
NS_DECL_RUNNABLEMETHOD_HELPER(ClassType, Method) \
\
};
#define NS_DECL_RUNNABLEMETHOD_ARG1(ClassType, Method, Arg1Type) \
class nsRunnableMethod_##Method : public nsRunnable \
{ \
public: \
nsRunnableMethod_##Method(ClassType *aObj, Arg1Type aArg1) : \
mObj(aObj), mArg1(aArg1) \
{ \
NS_IF_ADDREF(mObj); \
} \
\
NS_IMETHODIMP Run() \
{ \
if (!mObj) \
return NS_OK; \
(mObj-> Method)(mArg1); \
return NS_OK; \
} \
\
NS_DECL_RUNNABLEMETHOD_HELPER(ClassType, Method) \
Arg1Type mArg1; \
};
#define NS_DECL_RUNNABLEMETHOD_ARG2(ClassType, Method, Arg1Type, Arg2Type) \
class nsRunnableMethod_##Method : public nsRunnable \
{ \
public: \
\
nsRunnableMethod_##Method(ClassType *aObj, \
Arg1Type aArg1, Arg2Type aArg2) : \
mObj(aObj), mArg1(aArg1), mArg2(aArg2) \
{ \
NS_IF_ADDREF(mObj); \
} \
\
NS_IMETHODIMP Run() \
{ \
if (!mObj) \
return NS_OK; \
(mObj-> Method)(mArg1, mArg2); \
return NS_OK; \
} \
\
NS_DECL_RUNNABLEMETHOD_HELPER(ClassType, Method) \
Arg1Type mArg1; \
Arg2Type mArg2; \
};
#define NS_DISPATCH_RUNNABLEMETHOD(Method, Obj) \
{ \
nsCOMPtr<nsIRunnable> runnable = \
new nsRunnableMethod_##Method(Obj); \
if (runnable) \
NS_DispatchToMainThread(runnable); \
}
#define NS_DISPATCH_RUNNABLEMETHOD_ARG1(Method, Obj, Arg1) \
{ \
nsCOMPtr<nsIRunnable> runnable = \
new nsRunnableMethod_##Method(Obj, Arg1); \
if (runnable) \
NS_DispatchToMainThread(runnable); \
}
#define NS_DISPATCH_RUNNABLEMETHOD_ARG2(Method, Obj, Arg1, Arg2) \
{ \
nsCOMPtr<nsIRunnable> runnable = \
new nsRunnableMethod_##Method(Obj, Arg1, Arg2); \
if (runnable) \
NS_DispatchToMainThread(runnable); \
}
#endif