/usr/include/thunderbird-11.0.1/nsDOMScriptObjectHolder.h is in thunderbird-dev 11.0.1+build1-0ubuntu2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 | /* -*- 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
* Netscape Communications Corporation.
* Portions created by the Initial Developer are Copyright (C) 2005
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
* Mark Hammond <mhammond@skippinet.com.au>
*
* 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 nsDOMScriptObjectHolder_h__
#define nsDOMScriptObjectHolder_h__
#include "nsIScriptContext.h"
#include "nsIDOMScriptObjectFactory.h"
#include "jspubtd.h"
// A thin class used to help with script object memory management. No virtual
// functions and a fully inline implementation should keep the cost down.
// [Note that a fully inline implementation is necessary for use by other
// languages, which do not link against the layout component module]
template<class T>
class NS_STACK_CLASS nsScriptObjectHolder {
public:
// A constructor that will cause a reference to |ctx| to be stored in
// the object. Only use for short-lived object holders.
nsScriptObjectHolder<T>(nsIScriptContext *ctx, T* aObject = nsnull) :
mObject(aObject), mContext(ctx) {
NS_ASSERTION(ctx, "Must provide a valid context");
}
// copy constructor
nsScriptObjectHolder<T>(const nsScriptObjectHolder<T>& other) :
mObject(other.mObject),
mContext(other.mContext)
{
// New hold the script object and new reference on the script context.
if (mObject)
mContext->HoldScriptObject(mObject);
}
~nsScriptObjectHolder<T>() {
if (mObject)
mContext->DropScriptObject(mObject);
}
// misc operators
nsScriptObjectHolder<T> &operator=(const nsScriptObjectHolder<T> &other) {
set(other);
return *this;
}
bool operator!() const {
return !mObject;
}
operator bool() const {
return !!mObject;
}
T* get() const {
return mObject;
}
// Drop the script object - but *not* the nsIScriptContext.
nsresult drop() {
nsresult rv = NS_OK;
if (mObject) {
rv = mContext->DropScriptObject(mObject);
mObject = nsnull;
}
return rv;
}
nsresult set(T* object) {
NS_ASSERTION(getScriptTypeID() != nsIProgrammingLanguage::UNKNOWN,
"Must know the language!");
nsresult rv = drop();
if (NS_FAILED(rv))
return rv;
if (object) {
rv = mContext->HoldScriptObject(object);
// don't store the pointer if we failed to lock it.
if (NS_SUCCEEDED(rv)) {
mObject = object;
}
}
return rv;
}
nsresult set(const nsScriptObjectHolder<T> &other) {
NS_ASSERTION(getScriptTypeID() == other.getScriptTypeID(),
"Must have identical languages!");
nsresult rv = drop();
if (NS_FAILED(rv))
return rv;
return set(other.mObject);
}
// Get the language ID.
PRUint32 getScriptTypeID() const {
return mContext->GetScriptTypeID();
}
protected:
T* mObject;
nsCOMPtr<nsIScriptContext> mContext;
};
#endif // nsDOMScriptObjectHolder_h__
|