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a11yGeneric.h
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a11yGeneric.h
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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* ***** BEGIN LICENSE BLOCK *****
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
* http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* The Original Code is mozilla.org code.
*
* The Initial Developer of the Original Code is
* Mozilla Foundation.
* Portions created by the Initial Developer are Copyright (C) 2010
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
* Alexander Surkov <surkov.alexander@gmail.com> (original author)
*
* Alternatively, the contents of this file may be used under the terms of
* either of the GNU General Public License Version 2 or later (the "GPL"),
* or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the MPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the MPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK ***** */
#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_OK_DEFUNCT_OBJECT \
NS_ERROR_GENERATE_SUCCESS(NS_ERROR_MODULE_GENERAL, 0x22)
#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