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90 lines
3.2 KiB
C++
90 lines
3.2 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=2 sw=2 et tw=80: */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#ifndef nsIScriptGlobalObject_h__
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#define nsIScriptGlobalObject_h__
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#include "nsISupports.h"
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#include "nsIGlobalObject.h"
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#include "js/TypeDecls.h"
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#include "mozilla/EventForwards.h"
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class nsIScriptContext;
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class nsIScriptGlobalObject;
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// A helper function for nsIScriptGlobalObject implementations to use
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// when handling a script error. Generally called by the global when a context
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// notifies it of an error via nsIScriptGlobalObject::HandleScriptError.
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// Returns true if HandleDOMEvent was actually called, in which case
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// aStatus will be filled in with the status.
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bool
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NS_HandleScriptError(nsIScriptGlobalObject *aScriptGlobal,
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mozilla::InternalScriptErrorEvent *aErrorEvent,
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nsEventStatus *aStatus);
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#define NS_ISCRIPTGLOBALOBJECT_IID \
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{ 0x30c64680, 0x909a, 0x4435, \
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{ 0x90, 0x3b, 0x29, 0x3e, 0xb5, 0x5d, 0xc7, 0xa0 } }
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/**
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* The global object which keeps a script context for each supported script
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* language. This often used to store per-window global state.
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* This is a heavyweight interface implemented only by DOM globals, and
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* it might go away some time in the future.
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*/
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class nsIScriptGlobalObject : public nsIGlobalObject
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{
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public:
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NS_DECLARE_STATIC_IID_ACCESSOR(NS_ISCRIPTGLOBALOBJECT_IID)
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/**
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* Ensure that the script global object is initialized for working with the
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* specified script language ID. This will set up the nsIScriptContext
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* and 'script global' for that language, allowing these to be fetched
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* and manipulated.
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* @return NS_OK if successful; error conditions include that the language
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* has not been registered, as well as 'normal' errors, such as
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* out-of-memory
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*/
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virtual nsresult EnsureScriptEnvironment() = 0;
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/**
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* Get a script context (WITHOUT added reference) for the specified language.
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*/
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virtual nsIScriptContext *GetScriptContext() = 0;
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nsIScriptContext* GetContext() {
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return GetScriptContext();
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}
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/**
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* Called when the global script for a language is finalized, typically as
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* part of its GC process. By the time this call is made, the
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* nsIScriptContext for the language has probably already been removed.
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* After this call, the passed object is dead - which should generally be the
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* same object the global is using for a global for that language.
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*/
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virtual void OnFinalize(JSObject* aObject) = 0;
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/**
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* Handle a script error. Generally called by a script context.
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*/
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virtual nsresult HandleScriptError(
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mozilla::InternalScriptErrorEvent *aErrorEvent,
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nsEventStatus *aEventStatus) {
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NS_ENSURE_STATE(NS_HandleScriptError(this, aErrorEvent, aEventStatus));
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return NS_OK;
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}
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virtual bool IsBlackForCC(bool aTracingNeeded = true) { return false; }
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};
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NS_DEFINE_STATIC_IID_ACCESSOR(nsIScriptGlobalObject,
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NS_ISCRIPTGLOBALOBJECT_IID)
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#endif
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