mirror of
https://github.com/mozilla/gecko-dev.git
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340 lines
8.8 KiB
C++
340 lines
8.8 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*-
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* vim: sw=2 ts=2 et :
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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 Plugin App.
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*
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* The Initial Developer of the Original Code is
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* The Mozilla Foundation
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* Portions created by the Initial Developer are Copyright (C) 2009
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* the Initial Developer. All Rights Reserved.
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*
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* Contributor(s):
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* Ben Turner <bent.mozilla@gmail.com>
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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 the GNU General Public License Version 2 or later (the "GPL"), or
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* 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 dom_plugins_PluginScriptableObjectUtils_h
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#define dom_plugins_PluginScriptableObjectUtils_h
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#include "PluginModuleParent.h"
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#include "PluginModuleChild.h"
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#include "PluginInstanceParent.h"
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#include "PluginInstanceChild.h"
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#include "PluginScriptableObjectParent.h"
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#include "PluginScriptableObjectChild.h"
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#include "npapi.h"
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#include "npfunctions.h"
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#include "npruntime.h"
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#include "nsDebug.h"
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namespace mozilla {
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namespace plugins {
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inline PluginInstanceParent*
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GetInstance(NPObject* aObject)
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{
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NS_ASSERTION(aObject->_class == PluginScriptableObjectParent::GetClass(),
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"Bad class!");
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ParentNPObject* object = reinterpret_cast<ParentNPObject*>(aObject);
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if (object->invalidated) {
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NS_WARNING("Calling method on an invalidated object!");
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return nsnull;
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}
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if (!object->parent) {
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return nsnull;
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}
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return object->parent->GetInstance();
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}
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inline NPObject*
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NPObjectFromVariant(const Variant& aRemoteVariant)
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{
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switch (aRemoteVariant.type()) {
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case Variant::TPPluginScriptableObjectParent: {
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PluginScriptableObjectParent* actor =
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const_cast<PluginScriptableObjectParent*>(
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reinterpret_cast<const PluginScriptableObjectParent*>(
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aRemoteVariant.get_PPluginScriptableObjectParent()));
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return actor->GetObject(true);
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}
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case Variant::TPPluginScriptableObjectChild: {
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PluginScriptableObjectChild* actor =
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const_cast<PluginScriptableObjectChild*>(
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reinterpret_cast<const PluginScriptableObjectChild*>(
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aRemoteVariant.get_PPluginScriptableObjectChild()));
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return actor->GetObject(true);
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}
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default:
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NS_NOTREACHED("Shouldn't get here!");
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return nsnull;
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}
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}
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inline NPObject*
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NPObjectFromVariant(const NPVariant& aVariant)
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{
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NS_ASSERTION(NPVARIANT_IS_OBJECT(aVariant), "Wrong variant type!");
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return NPVARIANT_TO_OBJECT(aVariant);
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}
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inline const NPNetscapeFuncs*
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GetNetscapeFuncs(PluginInstanceParent* aInstance)
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{
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PluginModuleParent* module = aInstance->Module();
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if (!module) {
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NS_WARNING("Null module?!");
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return nsnull;
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}
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return module->GetNetscapeFuncs();
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}
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inline const NPNetscapeFuncs*
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GetNetscapeFuncs(NPObject* aObject)
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{
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NS_ASSERTION(aObject->_class == PluginScriptableObjectParent::GetClass(),
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"Bad class!");
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PluginInstanceParent* instance = GetInstance(aObject);
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if (!instance) {
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return nsnull;
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}
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return GetNetscapeFuncs(instance);
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}
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inline void
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ReleaseRemoteVariant(Variant& aVariant)
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{
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switch (aVariant.type()) {
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case Variant::TPPluginScriptableObjectParent: {
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PluginScriptableObjectParent* actor =
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const_cast<PluginScriptableObjectParent*>(
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reinterpret_cast<const PluginScriptableObjectParent*>(
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aVariant.get_PPluginScriptableObjectParent()));
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actor->Unprotect();
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break;
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}
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case Variant::TPPluginScriptableObjectChild: {
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NS_ASSERTION(PluginModuleChild::current(),
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"Should only be running in the child!");
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PluginScriptableObjectChild* actor =
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const_cast<PluginScriptableObjectChild*>(
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reinterpret_cast<const PluginScriptableObjectChild*>(
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aVariant.get_PPluginScriptableObjectChild()));
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actor->Unprotect();
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break;
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}
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default:
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break; // Intentional fall-through for other variant types.
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}
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aVariant = mozilla::void_t();
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}
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bool
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ConvertToVariant(const Variant& aRemoteVariant,
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NPVariant& aVariant,
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PluginInstanceParent* aInstance = nsnull);
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template <class InstanceType>
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bool
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ConvertToRemoteVariant(const NPVariant& aVariant,
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Variant& aRemoteVariant,
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InstanceType* aInstance,
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bool aProtectActors = false);
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class ProtectedVariant
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{
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public:
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ProtectedVariant(const NPVariant& aVariant,
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PluginInstanceParent* aInstance)
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{
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mOk = ConvertToRemoteVariant(aVariant, mVariant, aInstance, true);
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}
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ProtectedVariant(const NPVariant& aVariant,
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PluginInstanceChild* aInstance)
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{
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mOk = ConvertToRemoteVariant(aVariant, mVariant, aInstance, true);
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}
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~ProtectedVariant() {
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ReleaseRemoteVariant(mVariant);
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}
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PRBool IsOk() {
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return mOk;
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}
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operator const Variant&() {
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return mVariant;
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}
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private:
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Variant mVariant;
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bool mOk;
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};
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class ProtectedVariantArray
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{
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public:
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ProtectedVariantArray(const NPVariant* aArgs,
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PRUint32 aCount,
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PluginInstanceParent* aInstance)
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: mUsingShadowArray(false)
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{
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for (PRUint32 index = 0; index < aCount; index++) {
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Variant* remoteVariant = mArray.AppendElement();
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if (!(remoteVariant &&
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ConvertToRemoteVariant(aArgs[index], *remoteVariant, aInstance,
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true))) {
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mOk = false;
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return;
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}
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}
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mOk = true;
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}
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ProtectedVariantArray(const NPVariant* aArgs,
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PRUint32 aCount,
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PluginInstanceChild* aInstance)
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: mUsingShadowArray(false)
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{
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for (PRUint32 index = 0; index < aCount; index++) {
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Variant* remoteVariant = mArray.AppendElement();
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if (!(remoteVariant &&
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ConvertToRemoteVariant(aArgs[index], *remoteVariant, aInstance,
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true))) {
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mOk = false;
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return;
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}
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}
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mOk = true;
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}
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~ProtectedVariantArray()
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{
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InfallibleTArray<Variant>& vars = EnsureAndGetShadowArray();
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PRUint32 count = vars.Length();
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for (PRUint32 index = 0; index < count; index++) {
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ReleaseRemoteVariant(vars[index]);
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}
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}
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operator const InfallibleTArray<Variant>&()
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{
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return EnsureAndGetShadowArray();
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}
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bool IsOk()
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{
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return mOk;
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}
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private:
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InfallibleTArray<Variant>&
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EnsureAndGetShadowArray()
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{
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if (!mUsingShadowArray) {
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mShadowArray.SwapElements(mArray);
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mUsingShadowArray = true;
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}
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return mShadowArray;
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}
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// We convert the variants fallibly, but pass them to Call*()
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// methods as an infallible array
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nsTArray<Variant> mArray;
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InfallibleTArray<Variant> mShadowArray;
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bool mOk;
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bool mUsingShadowArray;
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};
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template<class ActorType>
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struct ProtectedActorTraits
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{
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static bool Nullable();
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};
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template<class ActorType, class Traits=ProtectedActorTraits<ActorType> >
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class ProtectedActor
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{
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public:
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ProtectedActor(ActorType* aActor) : mActor(aActor)
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{
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if (!Traits::Nullable()) {
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NS_ASSERTION(mActor, "This should never be null!");
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}
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}
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~ProtectedActor()
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{
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if (Traits::Nullable() && !mActor)
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return;
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mActor->Unprotect();
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}
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ActorType* operator->()
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{
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return mActor;
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}
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operator bool()
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{
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return !!mActor;
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}
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private:
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ActorType* mActor;
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};
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template<>
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struct ProtectedActorTraits<PluginScriptableObjectParent>
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{
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static bool Nullable() { return true; }
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};
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template<>
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struct ProtectedActorTraits<PluginScriptableObjectChild>
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{
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static bool Nullable() { return false; }
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};
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} /* namespace plugins */
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} /* namespace mozilla */
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#include "PluginScriptableObjectUtils-inl.h"
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#endif /* dom_plugins_PluginScriptableObjectUtils_h */
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