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