gecko-dev/dom/base/nsPluginArray.cpp

438 lines
10 KiB
C++

/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* 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/. */
#include "nsPluginArray.h"
#include "nsMimeTypeArray.h"
#include "Navigator.h"
#include "nsIScriptGlobalObject.h"
#include "nsIDOMNavigator.h"
#include "nsIDOMMimeType.h"
#include "nsIPluginHost.h"
#include "nsIDocShell.h"
#include "nsIWebNavigation.h"
#include "nsDOMClassInfoID.h"
#include "nsError.h"
#include "nsPluginHost.h"
#include "nsIContentViewer.h"
#include "nsIDocument.h"
#include "nsIObserverService.h"
#include "nsIWeakReference.h"
#include "mozilla/Services.h"
using namespace mozilla;
using namespace mozilla::dom;
nsPluginArray::nsPluginArray(Navigator* navigator,
nsIDocShell *aDocShell)
: mNavigator(navigator),
mPluginHost(do_GetService(MOZ_PLUGIN_HOST_CONTRACTID)),
mPluginCount(0),
mPluginArray(nullptr),
mDocShell(do_GetWeakReference(aDocShell))
{
}
void
nsPluginArray::Init()
{
nsCOMPtr<nsIObserverService> obsService =
mozilla::services::GetObserverService();
if (obsService) {
obsService->AddObserver(this, "plugin-info-updated", true);
}
}
nsPluginArray::~nsPluginArray()
{
if (mPluginArray != nullptr) {
for (uint32_t i = 0; i < mPluginCount; i++) {
NS_IF_RELEASE(mPluginArray[i]);
}
delete[] mPluginArray;
}
}
DOMCI_DATA(PluginArray, nsPluginArray)
// QueryInterface implementation for nsPluginArray
NS_INTERFACE_MAP_BEGIN(nsPluginArray)
NS_INTERFACE_MAP_ENTRY_AMBIGUOUS(nsISupports, nsIDOMPluginArray)
NS_INTERFACE_MAP_ENTRY(nsIDOMPluginArray)
NS_INTERFACE_MAP_ENTRY(nsIObserver)
NS_INTERFACE_MAP_ENTRY(nsISupportsWeakReference)
NS_DOM_INTERFACE_MAP_ENTRY_CLASSINFO(PluginArray)
NS_INTERFACE_MAP_END
NS_IMPL_ADDREF(nsPluginArray)
NS_IMPL_RELEASE(nsPluginArray)
NS_IMETHODIMP
nsPluginArray::GetLength(uint32_t* aLength)
{
nsPluginHost *pluginHost = static_cast<nsPluginHost*>(mPluginHost.get());
if (AllowPlugins() && pluginHost)
return pluginHost->GetPluginCount(aLength);
*aLength = 0;
return NS_OK;
}
bool
nsPluginArray::AllowPlugins()
{
nsCOMPtr<nsIDocShell> docShell = do_QueryReferent(mDocShell);
if (!docShell) {
return false;
}
return docShell->PluginsAllowedInCurrentDoc();
}
nsIDOMPlugin*
nsPluginArray::GetItemAt(uint32_t aIndex, nsresult* aResult)
{
*aResult = NS_OK;
if (!AllowPlugins())
return nullptr;
if (mPluginArray == nullptr) {
*aResult = GetPlugins();
if (*aResult != NS_OK)
return nullptr;
}
return aIndex < mPluginCount ? mPluginArray[aIndex] : nullptr;
}
NS_IMETHODIMP
nsPluginArray::Item(uint32_t aIndex, nsIDOMPlugin** aReturn)
{
nsresult rv;
NS_IF_ADDREF(*aReturn = GetItemAt(aIndex, &rv));
return rv;
}
nsIDOMPlugin*
nsPluginArray::GetNamedItem(const nsAString& aName, nsresult* aResult)
{
*aResult = NS_OK;
if (!AllowPlugins())
return nullptr;
if (mPluginArray == nullptr) {
*aResult = GetPlugins();
if (*aResult != NS_OK)
return nullptr;
}
for (uint32_t i = 0; i < mPluginCount; i++) {
nsAutoString pluginName;
nsIDOMPlugin* plugin = mPluginArray[i];
if (plugin->GetName(pluginName) == NS_OK && pluginName.Equals(aName)) {
return plugin;
}
}
return nullptr;
}
NS_IMETHODIMP
nsPluginArray::NamedItem(const nsAString& aName, nsIDOMPlugin** aReturn)
{
NS_PRECONDITION(nullptr != aReturn, "null arg");
nsresult rv;
NS_IF_ADDREF(*aReturn = GetNamedItem(aName, &rv));
return rv;
}
nsresult
nsPluginArray::GetPluginHost(nsIPluginHost** aPluginHost)
{
NS_ENSURE_ARG_POINTER(aPluginHost);
nsresult rv = NS_OK;
if (!mPluginHost) {
mPluginHost = do_GetService(MOZ_PLUGIN_HOST_CONTRACTID, &rv);
if (NS_FAILED(rv)) {
return rv;
}
}
*aPluginHost = mPluginHost;
NS_IF_ADDREF(*aPluginHost);
return rv;
}
void
nsPluginArray::Invalidate()
{
mDocShell = nullptr;
mNavigator = nullptr;
nsCOMPtr<nsIObserverService> obsService =
mozilla::services::GetObserverService();
if (obsService) {
obsService->RemoveObserver(this, "plugin-info-updated");
}
}
NS_IMETHODIMP
nsPluginArray::Refresh(bool aReloadDocuments)
{
nsresult res = NS_OK;
if (!AllowPlugins())
return NS_SUCCESS_LOSS_OF_INSIGNIFICANT_DATA;
if (!mPluginHost) {
mPluginHost = do_GetService(MOZ_PLUGIN_HOST_CONTRACTID, &res);
}
if(NS_FAILED(res)) {
return res;
}
// NS_ERROR_PLUGINS_PLUGINSNOTCHANGED on reloading plugins indicates
// that plugins did not change and was not reloaded
bool pluginsNotChanged = false;
uint32_t currentPluginCount = 0;
if(mPluginHost) {
res = GetLength(&currentPluginCount);
NS_ENSURE_SUCCESS(res, res);
nsresult reloadResult = mPluginHost->ReloadPlugins(aReloadDocuments);
// currentPluginCount is as reported by nsPluginHost. mPluginCount is
// essentially a cache of this value, and may be out of date.
pluginsNotChanged = (reloadResult == NS_ERROR_PLUGINS_PLUGINSNOTCHANGED &&
currentPluginCount == mPluginCount);
}
// no need to reload the page if plugins have not been changed
// in fact, if we do reload we can hit recursive load problem, see bug 93351
if(pluginsNotChanged)
return res;
nsCOMPtr<nsIWebNavigation> webNav = do_QueryReferent(mDocShell);
if (mPluginArray != nullptr) {
for (uint32_t i = 0; i < mPluginCount; i++)
NS_IF_RELEASE(mPluginArray[i]);
delete[] mPluginArray;
}
mPluginCount = 0;
mPluginArray = nullptr;
if (mNavigator)
mNavigator->RefreshMIMEArray();
if (aReloadDocuments && webNav)
webNav->Reload(nsIWebNavigation::LOAD_FLAGS_NONE);
return res;
}
nsresult
nsPluginArray::GetPlugins()
{
nsresult rv = GetLength(&mPluginCount);
if (NS_SUCCEEDED(rv)) {
mPluginArray = new nsIDOMPlugin*[mPluginCount];
if (!mPluginArray)
return NS_ERROR_OUT_OF_MEMORY;
if (!mPluginCount)
return NS_OK;
nsPluginHost *pluginHost = static_cast<nsPluginHost*>(mPluginHost.get());
rv = pluginHost->GetPlugins(mPluginCount, mPluginArray);
if (NS_SUCCEEDED(rv)) {
// need to wrap each of these with a nsPluginElement, which
// is scriptable.
for (uint32_t i = 0; i < mPluginCount; i++) {
nsIDOMPlugin* wrapper = new nsPluginElement(mPluginArray[i]);
NS_IF_ADDREF(wrapper);
mPluginArray[i] = wrapper;
}
} else {
/* XXX this code is all broken. If GetPlugins fails, there's no contract
* explaining what should happen. Instead of deleting elements in an
* array of random pointers, we mark the array as 0 length.
*/
mPluginCount = 0;
}
}
return rv;
}
NS_IMETHODIMP
nsPluginArray::Observe(nsISupports *aSubject, const char *aTopic,
const PRUnichar *aData) {
if (!nsCRT::strcmp(aTopic, "plugin-info-updated")) {
Refresh(false);
}
return NS_OK;
}
nsPluginElement::nsPluginElement(nsIDOMPlugin* plugin)
{
mPlugin = plugin; // don't AddRef, see nsPluginArray::Item.
mMimeTypeCount = 0;
mMimeTypeArray = nullptr;
}
nsPluginElement::~nsPluginElement()
{
NS_IF_RELEASE(mPlugin);
if (mMimeTypeArray != nullptr) {
for (uint32_t i = 0; i < mMimeTypeCount; i++) {
nsMimeType* mt = static_cast<nsMimeType*>(mMimeTypeArray[i]);
if (mt) {
mt->DetachPlugin();
NS_RELEASE(mt);
}
}
delete[] mMimeTypeArray;
}
}
DOMCI_DATA(Plugin, nsPluginElement)
// QueryInterface implementation for nsPluginElement
NS_INTERFACE_MAP_BEGIN(nsPluginElement)
NS_INTERFACE_MAP_ENTRY(nsISupports)
NS_INTERFACE_MAP_ENTRY(nsIDOMPlugin)
NS_DOM_INTERFACE_MAP_ENTRY_CLASSINFO(Plugin)
NS_INTERFACE_MAP_END
NS_IMPL_ADDREF(nsPluginElement)
NS_IMPL_RELEASE(nsPluginElement)
NS_IMETHODIMP
nsPluginElement::GetDescription(nsAString& aDescription)
{
return mPlugin->GetDescription(aDescription);
}
NS_IMETHODIMP
nsPluginElement::GetFilename(nsAString& aFilename)
{
return mPlugin->GetFilename(aFilename);
}
NS_IMETHODIMP
nsPluginElement::GetVersion(nsAString& aVersion)
{
return mPlugin->GetVersion(aVersion);
}
NS_IMETHODIMP
nsPluginElement::GetName(nsAString& aName)
{
return mPlugin->GetName(aName);
}
NS_IMETHODIMP
nsPluginElement::GetLength(uint32_t* aLength)
{
return mPlugin->GetLength(aLength);
}
nsIDOMMimeType*
nsPluginElement::GetItemAt(uint32_t aIndex, nsresult *aResult)
{
if (mMimeTypeArray == nullptr) {
*aResult = GetMimeTypes();
if (*aResult != NS_OK)
return nullptr;
}
if (aIndex >= mMimeTypeCount) {
*aResult = NS_ERROR_FAILURE;
return nullptr;
}
*aResult = NS_OK;
return mMimeTypeArray[aIndex];
}
NS_IMETHODIMP
nsPluginElement::Item(uint32_t aIndex, nsIDOMMimeType** aReturn)
{
nsresult rv;
NS_IF_ADDREF(*aReturn = GetItemAt(aIndex, &rv));
return rv;
}
nsIDOMMimeType*
nsPluginElement::GetNamedItem(const nsAString& aName, nsresult *aResult)
{
if (mMimeTypeArray == nullptr) {
*aResult = GetMimeTypes();
if (*aResult != NS_OK)
return nullptr;
}
*aResult = NS_OK;
for (uint32_t i = 0; i < mMimeTypeCount; i++) {
nsAutoString type;
nsIDOMMimeType* mimeType = mMimeTypeArray[i];
if (mimeType->GetType(type) == NS_OK && type.Equals(aName)) {
return mimeType;
}
}
return nullptr;
}
NS_IMETHODIMP
nsPluginElement::NamedItem(const nsAString& aName, nsIDOMMimeType** aReturn)
{
nsresult rv;
NS_IF_ADDREF(*aReturn = GetNamedItem(aName, &rv));
return rv;
}
nsresult
nsPluginElement::GetMimeTypes()
{
nsresult rv = mPlugin->GetLength(&mMimeTypeCount);
if (rv == NS_OK) {
mMimeTypeArray = new nsIDOMMimeType*[mMimeTypeCount];
if (mMimeTypeArray == nullptr)
return NS_ERROR_OUT_OF_MEMORY;
for (uint32_t i = 0; i < mMimeTypeCount; i++) {
nsCOMPtr<nsIDOMMimeType> mimeType;
rv = mPlugin->Item(i, getter_AddRefs(mimeType));
if (rv != NS_OK)
break;
mimeType = new nsMimeType(this, mimeType);
NS_IF_ADDREF(mMimeTypeArray[i] = mimeType);
}
}
return rv;
}