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132 lines
4.3 KiB
C++
132 lines
4.3 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* ***** BEGIN LICENSE BLOCK *****
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* Version: MPL 1.1/GPL 2.0/LGPL 2.1
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*
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* The contents of this file are subject to the Mozilla Public License Version
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* 1.1 (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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* http://www.mozilla.org/MPL/
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*
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* Software distributed under the License is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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* for the specific language governing rights and limitations under the
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* License.
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*
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* The Original Code is mozilla.org code.
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*
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* The Initial Developer of the Original Code is
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* Netscape Communications Corporation.
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* Portions created by the Initial Developer are Copyright (C) 1998
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* the Initial Developer. All Rights Reserved.
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*
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* Contributor(s):
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*
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* Alternatively, the contents of this file may be used under the terms of
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* either of the GNU General Public License Version 2 or later (the "GPL"),
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* or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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* in which case the provisions of the GPL or the LGPL are applicable instead
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* of those above. If you wish to allow use of your version of this file only
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* under the terms of either the GPL or the LGPL, and not to allow others to
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* use your version of this file under the terms of the MPL, indicate your
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* decision by deleting the provisions above and replace them with the notice
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* and other provisions required by the GPL or the LGPL. If you do not delete
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* the provisions above, a recipient may use your version of this file under
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* the terms of any one of the MPL, the GPL or the LGPL.
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*
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* ***** END LICENSE BLOCK ***** */
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#ifndef nsJSUtils_h__
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#define nsJSUtils_h__
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/**
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* This is not a generated file. It contains common utility functions
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* invoked from the JavaScript code generated from IDL interfaces.
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* The goal of the utility functions is to cut down on the size of
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* the generated code itself.
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*/
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#include "nsISupports.h"
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#include "jsapi.h"
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#include "nsString.h"
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class nsIDOMEventListener;
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class nsIScriptContext;
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class nsIScriptGlobalObject;
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class nsIPrincipal;
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class nsJSUtils
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{
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public:
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static JSBool GetCallingLocation(JSContext* aContext, const char* *aFilename,
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PRUint32* aLineno);
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static nsIScriptGlobalObject *GetStaticScriptGlobal(JSContext* aContext,
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JSObject* aObj);
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static nsIScriptContext *GetStaticScriptContext(JSContext* aContext,
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JSObject* aObj);
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static nsIScriptGlobalObject *GetDynamicScriptGlobal(JSContext *aContext);
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static nsIScriptContext *GetDynamicScriptContext(JSContext *aContext);
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/**
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* Retrieve the inner window ID based on the given JSContext.
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*
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* @param JSContext aContext
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* The JSContext from which you want to find the inner window ID.
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*
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* @returns PRUint64 the inner window ID.
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*/
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static PRUint64 GetCurrentlyRunningCodeInnerWindowID(JSContext *aContext);
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};
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class nsDependentJSString : public nsDependentString
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{
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public:
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/**
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* In the case of string ids, getting the string's chars is infallible, so
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* the dependent string can be constructed directly.
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*/
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explicit nsDependentJSString(jsid id)
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: nsDependentString(JS_GetInternedStringChars(JSID_TO_STRING(id)),
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JS_GetStringLength(JSID_TO_STRING(id)))
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{
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}
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/**
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* For all other strings, the nsDependentJSString object should be default
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* constructed, which leaves it empty (this->IsEmpty()), and initialized with
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* one of the fallible init() methods below.
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*/
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nsDependentJSString()
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{
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}
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JSBool init(JSContext* aContext, JSString* str)
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{
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size_t length;
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const jschar* chars = JS_GetStringCharsZAndLength(aContext, str, &length);
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if (!chars)
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return JS_FALSE;
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NS_ASSERTION(IsEmpty(), "init() on initialized string");
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nsDependentString* base = this;
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new(base) nsDependentString(chars, length);
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return JS_TRUE;
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}
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JSBool init(JSContext* aContext, const jsval &v)
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{
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return init(aContext, JSVAL_TO_STRING(v));
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}
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~nsDependentJSString()
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{
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}
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};
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#endif /* nsJSUtils_h__ */
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