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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* 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 */
#include "nsWebNavigationInfo.h"
#include "mozilla/dom/BrowsingContext.h"
#include "nsIWebNavigation.h"
#include "nsServiceManagerUtils.h"
#include "nsIDocumentLoaderFactory.h"
#include "nsIPluginHost.h"
#include "nsIDocShell.h"
#include "nsContentUtils.h"
#include "imgLoader.h"
#include "nsPluginHost.h"
NS_IMPL_ISUPPORTS(nsWebNavigationInfo, nsIWebNavigationInfo)
nsWebNavigationInfo::IsTypeSupported(const nsACString& aType,
nsIWebNavigation* aWebNav,
uint32_t* aIsTypeSupported) {
MOZ_ASSERT(aIsTypeSupported, "null out param?");
*aIsTypeSupported = IsTypeSupported(aType, aWebNav);
return NS_OK;
uint32_t nsWebNavigationInfo::IsTypeSupported(const nsACString& aType,
nsIWebNavigation* aWebNav) {
// Note to self: aWebNav could be an nsWebBrowser or an nsDocShell here (or
// an nsSHistory, but not much we can do with that). So if we start using
// it here, we need to be careful to get to the docshell correctly.
nsCOMPtr<nsIDocShell> docShell(do_QueryInterface(aWebNav));
auto* browsingContext = docShell ? docShell->GetBrowsingContext() : nullptr;
bool pluginsAllowed =
browsingContext ? browsingContext->GetAllowPlugins() : true;
return IsTypeSupported(aType, pluginsAllowed);
uint32_t nsWebNavigationInfo::IsTypeSupported(const nsACString& aType,
bool aPluginsAllowed) {
// We want to claim that the type for PDF documents is unsupported,
// so that the internal PDF viewer's stream converted will get used.
if (aType.LowerCaseEqualsLiteral("application/pdf") &&
nsContentUtils::IsPDFJSEnabled()) {
return nsIWebNavigationInfo::UNSUPPORTED;
const nsCString& flatType = PromiseFlatCString(aType);
uint32_t result = IsTypeSupportedInternal(flatType);
if (result != nsIWebNavigationInfo::UNSUPPORTED) {
return result;
// As of FF 52, we only support flash and test plugins, so if the mime types
// don't match for that, exit before we start loading plugins.
if (!nsPluginHost::CanUsePluginForMIMEType(aType)) {
return nsIWebNavigationInfo::UNSUPPORTED;
// If this request is for a docShell that isn't going to allow plugins,
// there's no need to try and find a plugin to handle it.
if (!aPluginsAllowed) {
return nsIWebNavigationInfo::UNSUPPORTED;
// Try reloading plugins in case they've changed.
nsCOMPtr<nsIPluginHost> pluginHost =
if (pluginHost) {
// false will ensure that currently running plugins will not
// be shut down
nsresult rv = pluginHost->ReloadPlugins();
if (NS_SUCCEEDED(rv)) {
// OK, we reloaded plugins and there were new ones
// been returned). Try checking whether we can handle the
// content now.
return IsTypeSupportedInternal(flatType);
return nsIWebNavigationInfo::UNSUPPORTED;
uint32_t nsWebNavigationInfo::IsTypeSupportedInternal(const nsCString& aType) {
nsContentUtils::ContentViewerType vtype = nsContentUtils::TYPE_UNSUPPORTED;
nsCOMPtr<nsIDocumentLoaderFactory> docLoaderFactory =
nsContentUtils::FindInternalContentViewer(aType, &vtype);
switch (vtype) {
case nsContentUtils::TYPE_UNSUPPORTED:
return nsIWebNavigationInfo::UNSUPPORTED;
case nsContentUtils::TYPE_PLUGIN:
return nsIWebNavigationInfo::PLUGIN;
case nsContentUtils::TYPE_UNKNOWN:
return nsIWebNavigationInfo::OTHER;
case nsContentUtils::TYPE_CONTENT:
// XXXbz we only need this because images register for the same
// contractid as documents, so we can't tell them apart based on
// contractid.
if (imgLoader::SupportImageWithMimeType(aType.get())) {
return nsIWebNavigationInfo::IMAGE;
} else {
return nsIWebNavigationInfo::OTHER;
return nsIWebNavigationInfo::UNSUPPORTED;