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gecko-dev
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gecko-dev/layout/build/nsContentDLF.cpp

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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 http://mozilla.org/MPL/2.0/. */
#include "nsContentDLF.h"
#include "mozilla/Encoding.h"
#include "nsCOMPtr.h"
#include "nsDocShell.h"
#include "nsGenericHTMLElement.h"
#include "nsGkAtoms.h"
#include "nsIComponentManager.h"
#include "nsIComponentRegistrar.h"
#include "nsIContentViewer.h"
#include "nsICategoryManager.h"
#include "nsIDocumentLoaderFactory.h"
#include "mozilla/dom/Document.h"
#include "nsIURL.h"
#include "nsNodeInfoManager.h"
#include "nsIScriptSecurityManager.h"
#include "nsString.h"
#include "nsContentCID.h"
#include "nsNetUtil.h"
#include "nsCRT.h"
#include "nsIViewSourceChannel.h"
#include "nsContentUtils.h"
#include "imgLoader.h"
#include "nsCharsetSource.h"
#include "nsMimeTypes.h"
#include "DecoderTraits.h"
#ifdef MOZ_XUL
# include "XULDocument.h"
#endif
// plugins
#include "nsIPluginHost.h"
#include "nsPluginHost.h"
// Factory code for creating variations on html documents
#undef NOISY_REGISTRY
using mozilla::dom::Document;
already_AddRefed<nsIContentViewer> NS_NewContentViewer();
static const char* const gHTMLTypes[] = {TEXT_HTML, VIEWSOURCE_CONTENT_TYPE,
APPLICATION_XHTML_XML,
APPLICATION_WAPXHTML_XML, 0};
static const char* const gXMLTypes[] = {TEXT_XML,
APPLICATION_XML,
APPLICATION_MATHML_XML,
APPLICATION_RDF_XML,
TEXT_RDF,
0};
static const char* const gSVGTypes[] = {IMAGE_SVG_XML, 0};
static const char* const gXULTypes[] = {TEXT_XUL, APPLICATION_CACHED_XUL, 0};
static bool IsTypeInList(const nsACString& aType, const char* const aList[]) {
int32_t typeIndex;
for (typeIndex = 0; aList[typeIndex]; ++typeIndex) {
if (aType.Equals(aList[typeIndex])) {
return true;
}
}
return false;
}
nsresult NS_NewContentDocumentLoaderFactory(
nsIDocumentLoaderFactory** aResult) {
MOZ_ASSERT(aResult, "null OUT ptr");
if (!aResult) {
return NS_ERROR_NULL_POINTER;
}
RefPtr<nsContentDLF> it = new nsContentDLF();
it.forget(aResult);
return NS_OK;
}
nsContentDLF::nsContentDLF() {}
nsContentDLF::~nsContentDLF() {}
NS_IMPL_ISUPPORTS(nsContentDLF, nsIDocumentLoaderFactory)
static bool MayUseXULXBL(nsIChannel* aChannel) {
nsIScriptSecurityManager* securityManager =
nsContentUtils::GetSecurityManager();
if (!securityManager) {
return false;
}
nsCOMPtr<nsIPrincipal> principal;
securityManager->GetChannelResultPrincipal(aChannel,
getter_AddRefs(principal));
NS_ENSURE_TRUE(principal, false);
return nsContentUtils::AllowXULXBLForPrincipal(principal);
}
NS_IMETHODIMP
nsContentDLF::CreateInstance(const char* aCommand, nsIChannel* aChannel,
nsILoadGroup* aLoadGroup,
const nsACString& aContentType,
nsIDocShell* aContainer, nsISupports* aExtraInfo,
nsIStreamListener** aDocListener,
nsIContentViewer** aDocViewer) {
// Make a copy of aContentType, because we're possibly going to change it.
nsAutoCString contentType(aContentType);
// Are we viewing source?
nsCOMPtr<nsIViewSourceChannel> viewSourceChannel =
do_QueryInterface(aChannel);
if (viewSourceChannel) {
aCommand = "view-source";
// The parser freaks out when it sees the content-type that a
// view-source channel normally returns. Get the actual content
// type of the data. If it's known, use it; otherwise use
// text/plain.
nsAutoCString type;
mozilla::Unused << viewSourceChannel->GetOriginalContentType(type);
bool knownType = (!type.EqualsLiteral(VIEWSOURCE_CONTENT_TYPE) &&
IsTypeInList(type, gHTMLTypes)) ||
nsContentUtils::IsPlainTextType(type) ||
IsTypeInList(type, gXMLTypes) ||
IsTypeInList(type, gSVGTypes) ||
IsTypeInList(type, gXMLTypes);
if (knownType) {
viewSourceChannel->SetContentType(type);
} else if (IsImageContentType(type.get())) {
// If it's an image, we want to display it the same way we normally would.
// Also note the lifetime of "type" allows us to safely use "get()" here.
contentType = type;
} else {
viewSourceChannel->SetContentType(NS_LITERAL_CSTRING(TEXT_PLAIN));
}
} else if (aContentType.EqualsLiteral(VIEWSOURCE_CONTENT_TYPE)) {
aChannel->SetContentType(NS_LITERAL_CSTRING(TEXT_PLAIN));
contentType = TEXT_PLAIN;
}
// Try html or plaintext; both use the same document CID
if (IsTypeInList(contentType, gHTMLTypes) ||
nsContentUtils::IsPlainTextType(contentType)) {
return CreateDocument(aCommand, aChannel, aLoadGroup, aContainer,
[]() -> already_AddRefed<Document> {
RefPtr<Document> doc;
nsresult rv =
NS_NewHTMLDocument(getter_AddRefs(doc));
NS_ENSURE_SUCCESS(rv, nullptr);
return doc.forget();
},
aDocListener, aDocViewer);
}
// Try XML
if (IsTypeInList(contentType, gXMLTypes)) {
return CreateDocument(aCommand, aChannel, aLoadGroup, aContainer,
[]() -> already_AddRefed<Document> {
RefPtr<Document> doc;
nsresult rv =
NS_NewXMLDocument(getter_AddRefs(doc));
NS_ENSURE_SUCCESS(rv, nullptr);
return doc.forget();
},
aDocListener, aDocViewer);
}
// Try SVG
if (IsTypeInList(contentType, gSVGTypes)) {
return CreateDocument(aCommand, aChannel, aLoadGroup, aContainer,
[]() -> already_AddRefed<Document> {
RefPtr<Document> doc;
nsresult rv =
NS_NewSVGDocument(getter_AddRefs(doc));
NS_ENSURE_SUCCESS(rv, nullptr);
return doc.forget();
},
aDocListener, aDocViewer);
}
// Try XUL
if (IsTypeInList(contentType, gXULTypes)) {
if (!MayUseXULXBL(aChannel)) {
return NS_ERROR_REMOTE_XUL;
}
return CreateXULDocument(aCommand, aChannel, aLoadGroup, aContainer,
aExtraInfo, aDocListener, aDocViewer);
}
if (mozilla::DecoderTraits::ShouldHandleMediaType(
contentType.get(),
/* DecoderDoctorDiagnostics* */ nullptr)) {
return CreateDocument(aCommand, aChannel, aLoadGroup, aContainer,
[]() -> already_AddRefed<Document> {
RefPtr<Document> doc;
nsresult rv =
NS_NewVideoDocument(getter_AddRefs(doc));
NS_ENSURE_SUCCESS(rv, nullptr);
return doc.forget();
},
aDocListener, aDocViewer);
}
// Try image types
if (IsImageContentType(contentType.get())) {
return CreateDocument(aCommand, aChannel, aLoadGroup, aContainer,
[]() -> already_AddRefed<Document> {
RefPtr<Document> doc;
nsresult rv =
NS_NewImageDocument(getter_AddRefs(doc));
NS_ENSURE_SUCCESS(rv, nullptr);
return doc.forget();
},
aDocListener, aDocViewer);
}
RefPtr<nsPluginHost> pluginHost = nsPluginHost::GetInst();
// Don't exclude disabled plugins, which will still trigger the "this plugin
// is disabled" placeholder.
if (pluginHost &&
pluginHost->HavePluginForType(contentType, nsPluginHost::eExcludeNone)) {
return CreateDocument(aCommand, aChannel, aLoadGroup, aContainer,
[]() -> already_AddRefed<Document> {
RefPtr<Document> doc;
nsresult rv =
NS_NewPluginDocument(getter_AddRefs(doc));
NS_ENSURE_SUCCESS(rv, nullptr);
return doc.forget();
},
aDocListener, aDocViewer);
}
// If we get here, then we weren't able to create anything. Sorry!
return NS_ERROR_FAILURE;
}
NS_IMETHODIMP
nsContentDLF::CreateInstanceForDocument(nsISupports* aContainer,
Document* aDocument,
const char* aCommand,
nsIContentViewer** aContentViewer) {
MOZ_ASSERT(aDocument);
nsCOMPtr<nsIContentViewer> contentViewer = NS_NewContentViewer();
// Bind the document to the Content Viewer
contentViewer->LoadStart(aDocument);
contentViewer.forget(aContentViewer);
return NS_OK;
}
/* static */ already_AddRefed<Document> nsContentDLF::CreateBlankDocument(
nsILoadGroup* aLoadGroup, nsIPrincipal* aPrincipal,
nsDocShell* aContainer) {
// create a new blank HTML document
RefPtr<Document> blankDoc;
mozilla::Unused << NS_NewHTMLDocument(getter_AddRefs(blankDoc));
if (!blankDoc) {
return nullptr;
}
// initialize
nsCOMPtr<nsIURI> uri;
NS_NewURI(getter_AddRefs(uri), NS_LITERAL_CSTRING("about:blank"));
if (!uri) {
return nullptr;
}
blankDoc->ResetToURI(uri, aLoadGroup, aPrincipal);
blankDoc->SetContainer(aContainer);
// add some simple content structure
nsNodeInfoManager* nim = blankDoc->NodeInfoManager();
RefPtr<mozilla::dom::NodeInfo> htmlNodeInfo;
// generate an html html element
htmlNodeInfo = nim->GetNodeInfo(nsGkAtoms::html, 0, kNameSpaceID_XHTML,
nsINode::ELEMENT_NODE);
nsCOMPtr<nsIContent> htmlElement =
NS_NewHTMLHtmlElement(htmlNodeInfo.forget());
// generate an html head element
htmlNodeInfo = nim->GetNodeInfo(nsGkAtoms::head, 0, kNameSpaceID_XHTML,
nsINode::ELEMENT_NODE);
nsCOMPtr<nsIContent> headElement =
NS_NewHTMLHeadElement(htmlNodeInfo.forget());
// generate an html body elemment
htmlNodeInfo = nim->GetNodeInfo(nsGkAtoms::body, 0, kNameSpaceID_XHTML,
nsINode::ELEMENT_NODE);
nsCOMPtr<nsIContent> bodyElement =
NS_NewHTMLBodyElement(htmlNodeInfo.forget());
// blat in the structure
NS_ASSERTION(blankDoc->GetChildCount() == 0, "Shouldn't have children");
if (!htmlElement || !headElement || !bodyElement ||
NS_FAILED(blankDoc->AppendChildTo(htmlElement, false)) ||
NS_FAILED(htmlElement->AppendChildTo(headElement, false)) ||
// XXXbz Why not notifying here?
NS_FAILED(htmlElement->AppendChildTo(bodyElement, false))) {
return nullptr;
}
// add a nice bow
blankDoc->SetDocumentCharacterSetSource(kCharsetFromDocTypeDefault);
blankDoc->SetDocumentCharacterSet(UTF_8_ENCODING);
return blankDoc.forget();
}
nsresult nsContentDLF::CreateDocument(
const char* aCommand, nsIChannel* aChannel, nsILoadGroup* aLoadGroup,
nsIDocShell* aContainer, nsContentDLF::DocumentCreator aDocumentCreator,
nsIStreamListener** aDocListener, nsIContentViewer** aContentViewer) {
MOZ_ASSERT(aDocumentCreator);
nsresult rv = NS_ERROR_FAILURE;
nsCOMPtr<nsIURI> aURL;
rv = aChannel->GetURI(getter_AddRefs(aURL));
if (NS_FAILED(rv)) return rv;
#ifdef NOISY_CREATE_DOC
if (nullptr != aURL) {
nsAutoString tmp;
aURL->ToString(tmp);
fputs(NS_LossyConvertUTF16toASCII(tmp).get(), stdout);
printf(": creating document\n");
}
#endif
// Create the document
RefPtr<Document> doc = aDocumentCreator();
NS_ENSURE_TRUE(doc, NS_ERROR_FAILURE);
// Create the content viewer XXX: could reuse content viewer here!
nsCOMPtr<nsIContentViewer> contentViewer = NS_NewContentViewer();
doc->SetContainer(static_cast<nsDocShell*>(aContainer));
// Initialize the document to begin loading the data. An
// nsIStreamListener connected to the parser is returned in
// aDocListener.
rv = doc->StartDocumentLoad(aCommand, aChannel, aLoadGroup, aContainer,
aDocListener, true);
NS_ENSURE_SUCCESS(rv, rv);
// Bind the document to the Content Viewer
contentViewer->LoadStart(doc);
contentViewer.forget(aContentViewer);
return NS_OK;
}
nsresult nsContentDLF::CreateXULDocument(
const char* aCommand, nsIChannel* aChannel, nsILoadGroup* aLoadGroup,
nsIDocShell* aContainer, nsISupports* aExtraInfo,
nsIStreamListener** aDocListener, nsIContentViewer** aContentViewer) {
RefPtr<Document> doc;
nsresult rv = NS_NewXULDocument(getter_AddRefs(doc));
if (NS_FAILED(rv)) return rv;
nsCOMPtr<nsIContentViewer> contentViewer = NS_NewContentViewer();
nsCOMPtr<nsIURI> aURL;
rv = aChannel->GetURI(getter_AddRefs(aURL));
if (NS_FAILED(rv)) return rv;
/*
* Initialize the document to begin loading the data...
*
* An nsIStreamListener connected to the parser is returned in
* aDocListener.
*/
doc->SetContainer(static_cast<nsDocShell*>(aContainer));
rv = doc->StartDocumentLoad(aCommand, aChannel, aLoadGroup, aContainer,
aDocListener, true);
if (NS_FAILED(rv)) return rv;
/*
* Bind the document to the Content Viewer...
*/
contentViewer->LoadStart(doc);
contentViewer.forget(aContentViewer);
return NS_OK;
}
bool nsContentDLF::IsImageContentType(const char* aContentType) {
return imgLoader::SupportImageWithMimeType(aContentType);
}
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