gecko/dom/base/nsIScriptRuntime.h

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2012-05-21 04:12:37 -07:00
/* 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 nsIScriptRuntime_h__
#define nsIScriptRuntime_h__
#include "nsIScriptContext.h"
#define NS_ISCRIPTRUNTIME_IID \
{ 0xb146580f, 0x55f7, 0x4d97, \
{ 0x8a, 0xbb, 0x4a, 0x50, 0xb0, 0xa8, 0x04, 0x97 } }
/**
* A singleton language environment for an application. Responsible for
* initializing and cleaning up the global language environment, and a factory
* for language contexts
*/
class nsIScriptRuntime : public nsISupports
{
public:
NS_DECLARE_STATIC_IID_ACCESSOR(NS_ISCRIPTRUNTIME_IID)
/* Parses a "version string" for the language into a bit-mask used by
* the language implementation. If the specified version is not supported
* an error should be returned. If the specified version is blank, a default
* version should be assumed
*/
virtual nsresult ParseVersion(const nsString &aVersionStr, PRUint32 *verFlags) = 0;
/* Factory for a new context for this language */
virtual already_AddRefed<nsIScriptContext> CreateContext() = 0;
/* Memory managment for script objects returned from various
* nsIScriptContext methods. These are identical to those in
* nsIScriptContext, but are useful when a script context is not known.
*/
virtual nsresult DropScriptObject(void *object) = 0;
virtual nsresult HoldScriptObject(void *object) = 0;
};
NS_DEFINE_STATIC_IID_ACCESSOR(nsIScriptRuntime, NS_ISCRIPTRUNTIME_IID)
/* helper functions */
nsresult NS_GetJSRuntime(nsIScriptRuntime** aLanguage);
nsresult NS_GetScriptRuntime(const nsAString &aLanguageName,
nsIScriptRuntime **aRuntime);
nsresult NS_GetScriptRuntimeByID(PRUint32 aLanguageID,
nsIScriptRuntime **aRuntime);
#endif // nsIScriptRuntime_h__