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pjs/content/build/nsContentDLF.cpp

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/* -*- Mode: c++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* ***** BEGIN LICENSE BLOCK *****
* Version: NPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Netscape Public License
* Version 1.1 (the "License"); you may not use this file except in
* compliance with the License. You may obtain a copy of the License at
* http://www.mozilla.org/NPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* The Original Code is Mozilla Communicator client code.
*
* The Initial Developer of the Original Code is
* Netscape Communications Corporation.
* Portions created by the Initial Developer are Copyright (C) 1998
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
*
*
* Alternatively, the contents of this file may be used under the terms of
* either the GNU General Public License Version 2 or later (the "GPL"), or
* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the NPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the NPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK ***** */
#include "nsCOMPtr.h"
#include "nsContentDLF.h"
#include "nsGenericHTMLElement.h"
#include "nsHTMLAtoms.h"
#include "nsIComponentManager.h"
#include "nsIComponentRegistrar.h"
#include "nsICategoryManager.h"
#include "nsIDocumentLoader.h"
#include "nsIDocumentLoaderFactory.h"
#include "nsIDocument.h"
#include "nsIDocumentViewer.h"
#include "nsIHTMLContent.h"
#include "nsIURL.h"
#include "nsICSSStyleSheet.h"
#include "nsNodeInfo.h"
#include "nsNodeInfoManager.h"
#include "nsString.h"
#include "nsContentCID.h"
#include "prprf.h"
#include "nsNetUtil.h"
#include "nsICSSLoader.h"
#include "nsRDFCID.h"
#include "nsIRDFResource.h"
#include "nsIXULContentSink.h"
#include "nsIDocStreamLoaderFactory.h"
#include "nsString.h"
// URL for the "user agent" style sheet
#define UA_CSS_URL "resource:/res/ua.css"
// Factory code for creating variations on html documents
#undef NOISY_REGISTRY
static NS_DEFINE_IID(kHTMLDocumentCID, NS_HTMLDOCUMENT_CID);
static NS_DEFINE_IID(kXMLDocumentCID, NS_XMLDOCUMENT_CID);
#ifdef MOZ_SVG
static NS_DEFINE_IID(kSVGDocumentCID, NS_SVGDOCUMENT_CID);
#endif
static NS_DEFINE_IID(kImageDocumentCID, NS_IMAGEDOCUMENT_CID);
static NS_DEFINE_IID(kXULDocumentCID, NS_XULDOCUMENT_CID);
extern nsresult NS_NewDocumentViewer(nsIDocumentViewer** aResult);
static const char* const gHTMLTypes[] = {
"text/html",
"text/plain",
"text/css",
"text/javascript",
"application/x-javascript",
"text/html; x-view-type=view-source",
"text/plain; x-view-type=view-source",
"text/css; x-view-type=view-source",
"text/javascript; x-view-type=view-source",
"application/x-javascript; x-view-type=view-source",
0
};
static const char* const gXMLTypes[] = {
"text/xml",
"application/xml",
"application/xhtml+xml",
"text/xml; x-view-type=view-source",
"application/xml; x-view-type=view-source",
"application/xhtml+xml; x-view-type=view-source",
0
};
#ifdef MOZ_SVG
static char* gSVGTypes[] = {
"image/svg+xml",
"image/svg+xml; x-view-type=view-source",
0
};
#endif
static const char* const gRDFTypes[] = {
"text/rdf",
"application/vnd.mozilla.xul+xml",
"mozilla.application/cached-xul",
"application/vnd.mozilla.xul+xml; x-view-type=view-source",
"mozilla.application/cached-xul; x-view-type=view-source",
0
};
static const char* const gImageTypes[] = {
"image/gif",
"image/jpeg",
"image/jpg",
"image/pjpeg",
"image/png",
"image/x-png",
"image/x-art",
"image/x-jg",
"image/bmp",
"image/x-icon",
"video/x-mng",
"image/x-jng",
0
};
nsICSSStyleSheet* nsContentDLF::gUAStyleSheet;
nsresult
NS_NewContentDocumentLoaderFactory(nsIDocumentLoaderFactory** aResult)
{
NS_PRECONDITION(aResult, "null OUT ptr");
if (!aResult) {
return NS_ERROR_NULL_POINTER;
}
nsContentDLF* it = new nsContentDLF();
if (!it) {
return NS_ERROR_OUT_OF_MEMORY;
}
return it->QueryInterface(NS_GET_IID(nsIDocumentLoaderFactory), (void**)aResult);
}
nsContentDLF::nsContentDLF()
{
NS_INIT_REFCNT();
}
nsContentDLF::~nsContentDLF()
{
}
NS_IMPL_ISUPPORTS2(nsContentDLF,
nsIDocumentLoaderFactory,
nsIDocStreamLoaderFactory);
NS_IMETHODIMP
nsContentDLF::CreateInstance(const char* aCommand,
nsIChannel* aChannel,
nsILoadGroup* aLoadGroup,
const char* aContentType,
nsISupports* aContainer,
nsISupports* aExtraInfo,
nsIStreamListener** aDocListener,
nsIContentViewer** aDocViewer)
{
EnsureUAStyleSheet();
// Check aContentType to see if it's a view-source type
//
// If it's a "view-source:", aContentType will be of the form
//
// <orig_type>; x-view-type=view-source
//
// where <orig_type> can be text/html, text/xml etc.
//
nsCAutoString strContentType(aContentType);
PRInt32 idx = strContentType.Find("; x-view-type=view-source", PR_TRUE, 0, -1);
if(idx != -1)
{ // Found "; x-view-type=view-source" param in content type.
// Set aCommand to view-source
aCommand = "view-source";
// Null terminate at the ";" in "text/html; x-view-type=view-source"
// The idea is to end up with the original content type i.e. without
// the x-view-type param was added to it.
strContentType.SetCharAt('\0', idx);
aContentType = strContentType.get(); //This will point to the "original" mime type
}
if(0==PL_strcmp(aCommand,"view-source")) {
NS_ENSURE_ARG(aChannel);
// It's a view-source. Reset channel's content type to the original
// type so as not to choke the parser when it asks the channel
// for the content type during the parse phase
aChannel->SetContentType(nsDependentCString(aContentType));
aContentType=gHTMLTypes[0];
}
// Try html
int typeIndex=0;
while(gHTMLTypes[typeIndex]) {
if (0== PL_strcmp(gHTMLTypes[typeIndex++], aContentType)) {
return CreateDocument(aCommand,
aChannel, aLoadGroup,
aContainer, kHTMLDocumentCID,
aDocListener, aDocViewer);
}
}
// Try XML
typeIndex = 0;
while(gXMLTypes[typeIndex]) {
if (0== PL_strcmp(gXMLTypes[typeIndex++], aContentType)) {
return CreateDocument(aCommand,
aChannel, aLoadGroup,
aContainer, kXMLDocumentCID,
aDocListener, aDocViewer);
}
}
#ifdef MOZ_SVG
// Try SVG
typeIndex = 0;
while(gSVGTypes[typeIndex]) {
if (!PL_strcmp(gSVGTypes[typeIndex++], aContentType)) {
return CreateDocument(aCommand,
aChannel, aLoadGroup,
aContainer, kSVGDocumentCID,
aDocListener, aDocViewer);
}
}
#endif
// Try RDF
typeIndex = 0;
while (gRDFTypes[typeIndex]) {
if (0 == PL_strcmp(gRDFTypes[typeIndex++], aContentType)) {
return CreateRDFDocument(aCommand,
aChannel, aLoadGroup,
aContentType, aContainer,
aExtraInfo, aDocListener, aDocViewer);
}
}
// Try image types
nsCOMPtr<nsIComponentRegistrar> reg;
NS_GetComponentRegistrar(getter_AddRefs(reg));
PRBool isReg = PR_FALSE;
nsCAutoString decoderId(NS_LITERAL_CSTRING("@mozilla.org/image/decoder;2?type=") + nsDependentCString(aContentType));
reg->IsContractIDRegistered(decoderId.get(), &isReg);
if (isReg) {
return CreateDocument(aCommand,
aChannel, aLoadGroup,
aContainer, kImageDocumentCID,
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,
nsIDocument* aDocument,
const char *aCommand,
nsIContentViewer** aDocViewerResult)
{
nsresult rv = NS_ERROR_FAILURE;
EnsureUAStyleSheet();
do {
nsCOMPtr<nsIDocumentViewer> docv;
rv = NS_NewDocumentViewer(getter_AddRefs(docv));
if (NS_FAILED(rv))
break;
docv->SetUAStyleSheet(NS_STATIC_CAST(nsIStyleSheet*, gUAStyleSheet));
// Bind the document to the Content Viewer
nsIContentViewer* cv = NS_STATIC_CAST(nsIContentViewer*, docv.get());
rv = cv->LoadStart(aDocument);
NS_ADDREF(*aDocViewerResult = cv);
} while (PR_FALSE);
return rv;
}
NS_IMETHODIMP
nsContentDLF::CreateBlankDocument(nsILoadGroup *aLoadGroup, nsIDocument **aDocument)
{
*aDocument = nsnull;
nsresult rv = NS_ERROR_FAILURE;
// create a new blank HTML document
nsCOMPtr<nsIDocument> blankDoc(do_CreateInstance(kHTMLDocumentCID));
if (blankDoc) {
// initialize
nsCOMPtr<nsIURI> uri;
NS_NewURI(getter_AddRefs(uri), NS_LITERAL_CSTRING("about:blank"));
if (uri)
rv = blankDoc->ResetToURI(uri, aLoadGroup);
}
// add some simple content structure
if (NS_SUCCEEDED(rv)) {
rv = NS_ERROR_FAILURE;
nsCOMPtr<nsINodeInfoManager> nim;
blankDoc->GetNodeInfoManager(*getter_AddRefs(nim));
if (nim) {
nsCOMPtr<nsINodeInfo> htmlNodeInfo;
// generate an html html element
nsCOMPtr<nsIHTMLContent> htmlElement;
nim->GetNodeInfo(nsHTMLAtoms::html, 0, kNameSpaceID_None,
*getter_AddRefs(htmlNodeInfo));
NS_NewHTMLHtmlElement(getter_AddRefs(htmlElement), htmlNodeInfo);
// generate an html head element
nsCOMPtr<nsIHTMLContent> headElement;
nim->GetNodeInfo(nsHTMLAtoms::head, 0, kNameSpaceID_None,
*getter_AddRefs(htmlNodeInfo));
NS_NewHTMLHeadElement(getter_AddRefs(headElement), htmlNodeInfo);
// generate an html body element
nsCOMPtr<nsIHTMLContent> bodyElement;
nim->GetNodeInfo(nsHTMLAtoms::body, 0, kNameSpaceID_None,
*getter_AddRefs(htmlNodeInfo));
NS_NewHTMLBodyElement(getter_AddRefs(bodyElement), htmlNodeInfo);
// blat in the structure
if (htmlElement && headElement && bodyElement) {
htmlElement->SetDocument(blankDoc, PR_FALSE, PR_TRUE);
blankDoc->SetRootContent(htmlElement);
htmlElement->AppendChildTo(headElement, PR_FALSE, PR_FALSE);
PRInt32 id;
blankDoc->GetAndIncrementContentID(&id);
bodyElement->SetContentID(id);
htmlElement->AppendChildTo(bodyElement, PR_FALSE, PR_FALSE);
rv = NS_OK;
}
}
}
// add a nice bow
if (NS_SUCCEEDED(rv)) {
*aDocument = blankDoc;
NS_ADDREF(*aDocument);
}
return rv;
}
nsresult
nsContentDLF::CreateDocument(const char* aCommand,
nsIChannel* aChannel,
nsILoadGroup* aLoadGroup,
nsISupports* aContainer,
const nsCID& aDocumentCID,
nsIStreamListener** aDocListener,
nsIContentViewer** aDocViewer)
{
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 (nsnull != aURL) {
nsAutoString tmp;
aURL->ToString(tmp);
fputs(NS_LossyConvertUCS2toASCII(tmp).get(), stdout);
printf(": creating document\n");
}
#endif
nsCOMPtr<nsIDocument> doc;
nsCOMPtr<nsIDocumentViewer> docv;
do {
// Create the document
rv = nsComponentManager::CreateInstance(aDocumentCID, nsnull,
NS_GET_IID(nsIDocument),
getter_AddRefs(doc));
if (NS_FAILED(rv))
break;
// Create the document viewer XXX: could reuse document viewer here!
rv = NS_NewDocumentViewer(getter_AddRefs(docv));
if (NS_FAILED(rv))
break;
docv->SetUAStyleSheet(gUAStyleSheet);
// 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, PR_TRUE);
if (NS_FAILED(rv))
break;
// Bind the document to the Content Viewer
rv = docv->LoadStart(doc);
*aDocViewer = docv;
NS_IF_ADDREF(*aDocViewer);
} while (PR_FALSE);
return rv;
}
NS_IMETHODIMP
nsContentDLF::CreateInstance(nsIInputStream& aInputStream,
const char* aContentType,
const char* aCommand,
nsISupports* aContainer,
nsISupports* aExtraInfo,
nsIContentViewer** aDocViewer)
{
nsresult status = NS_ERROR_FAILURE;
EnsureUAStyleSheet();
// Try RDF
int typeIndex = 0;
while (gRDFTypes[typeIndex]) {
if (0 == PL_strcmp(gRDFTypes[typeIndex++], aContentType)) {
return CreateXULDocumentFromStream(aInputStream,
aCommand,
aContainer,
aExtraInfo,
aDocViewer);
}
}
return status;
}
// ...common work for |CreateRDFDocument| and |CreateXULDocumentFromStream|
nsresult
nsContentDLF::CreateRDFDocument(nsISupports* aExtraInfo,
nsCOMPtr<nsIDocument>* doc,
nsCOMPtr<nsIDocumentViewer>* docv)
{
nsresult rv = NS_ERROR_FAILURE;
// Create the XUL document
rv = nsComponentManager::CreateInstance(kXULDocumentCID, nsnull,
NS_GET_IID(nsIDocument),
getter_AddRefs(*doc));
if (NS_FAILED(rv)) return rv;
// Create the image content viewer...
rv = NS_NewDocumentViewer(getter_AddRefs(*docv));
if (NS_FAILED(rv)) return rv;
// Load the UA style sheet if we haven't already done that
(*docv)->SetUAStyleSheet(gUAStyleSheet);
return NS_OK;
}
// ...note, this RDF document _may_ be XUL :-)
nsresult
nsContentDLF::CreateRDFDocument(const char* aCommand,
nsIChannel* aChannel,
nsILoadGroup* aLoadGroup,
const char* aContentType,
nsISupports* aContainer,
nsISupports* aExtraInfo,
nsIStreamListener** aDocListener,
nsIContentViewer** aDocViewer)
{
nsCOMPtr<nsIDocument> doc;
nsCOMPtr<nsIDocumentViewer> docv;
nsresult rv = CreateRDFDocument(aExtraInfo, address_of(doc), address_of(docv));
if (NS_FAILED(rv)) {
return rv;
}
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.
*/
rv = doc->StartDocumentLoad(aCommand, aChannel, aLoadGroup, aContainer, aDocListener, PR_TRUE);
if (NS_SUCCEEDED(rv)) {
/*
* Bind the document to the Content Viewer...
*/
rv = docv->LoadStart(doc);
*aDocViewer = docv;
NS_IF_ADDREF(*aDocViewer);
}
return rv;
}
nsresult
nsContentDLF::CreateXULDocumentFromStream(nsIInputStream& aXULStream,
const char* aCommand,
nsISupports* aContainer,
nsISupports* aExtraInfo,
nsIContentViewer** aDocViewer)
{
nsresult status = NS_OK;
#if 0 // XXX dead code; remove
do
{
nsCOMPtr<nsIDocument> doc;
nsCOMPtr<nsIDocumentViewer> docv;
if ( NS_FAILED(status = CreateRDFDocument(aExtraInfo, address_of(doc), address_of(docv))) )
break;
if ( NS_FAILED(status = docv->LoadStart(doc)) )
break;
*aDocViewer = docv;
NS_IF_ADDREF(*aDocViewer);
nsCOMPtr<nsIStreamLoadableDocument> loader = do_QueryInterface(doc, &status);
if ( NS_FAILED(status) )
break;
status = loader->LoadFromStream(aXULStream, aContainer, aCommand);
}
while (0);
#endif
return status;
}
static NS_DEFINE_IID(kDocumentFactoryImplCID, NS_CONTENT_DOCUMENT_LOADER_FACTORY_CID);
static nsresult
RegisterTypes(nsIComponentManager* aCompMgr,
nsICategoryManager* aCatMgr,
const char* aCommand,
nsIFile* aPath,
const char *aLocation,
const char *aType,
const char* const* aTypes)
{
nsresult rv = NS_OK;
while (*aTypes) {
char contractid[500];
const char* contentType = *aTypes++;
PR_snprintf(contractid, sizeof(contractid),
NS_DOCUMENT_LOADER_FACTORY_CONTRACTID_PREFIX "%s;1?type=%s",
aCommand, contentType);
#ifdef NOISY_REGISTRY
printf("Register %s => %s\n", contractid, aPath);
#endif
nsCOMPtr<nsIComponentRegistrar> registrar = do_QueryInterface(aCompMgr, &rv);
if (NS_FAILED(rv))
return rv;
rv = registrar->RegisterFactoryLocation(kDocumentFactoryImplCID,
"Layout",
contractid,
aPath,
aLocation,
aType);
if (NS_FAILED(rv)) break;
// add the MIME types layotu can handle to the handlers category.
// this allows users of layout's viewers (the docshell for example)
// to query the types of viewers layout can create.
nsXPIDLCString previous;
rv = aCatMgr->AddCategoryEntry("Gecko-Content-Viewers", contentType,
contractid,
PR_TRUE, PR_TRUE, getter_Copies(previous));
if (NS_FAILED(rv)) break;
}
return rv;
}
NS_IMETHODIMP
nsContentDLF::RegisterDocumentFactories(nsIComponentManager* aCompMgr,
nsIFile* aPath,
const char *aLocation,
const char *aType,
const nsModuleComponentInfo* aInfo)
{
nsresult rv;
nsCOMPtr<nsICategoryManager> catmgr(do_GetService(NS_CATEGORYMANAGER_CONTRACTID, &rv));
if (NS_FAILED(rv)) return rv;
do {
rv = RegisterTypes(aCompMgr, catmgr, "view", aPath, aLocation, aType, gHTMLTypes);
if (NS_FAILED(rv))
break;
rv = RegisterTypes(aCompMgr, catmgr, "view-source", aPath, aLocation, aType, gHTMLTypes);
if (NS_FAILED(rv))
break;
rv = RegisterTypes(aCompMgr, catmgr, "view", aPath, aLocation, aType, gXMLTypes);
if (NS_FAILED(rv))
break;
rv = RegisterTypes(aCompMgr, catmgr, "view-source", aPath, aLocation, aType, gXMLTypes);
if (NS_FAILED(rv))
break;
#ifdef MOZ_SVG
rv = RegisterTypes(aCompMgr, catmgr, "view", aPath, aLocation, aType, gSVGTypes);
if (NS_FAILED(rv))
break;
rv = RegisterTypes(aCompMgr, catmgr, "view-source", aPath, aLocation, aType, gSVGTypes);
if (NS_FAILED(rv))
break;
#endif
rv = RegisterTypes(aCompMgr, catmgr, "view", aPath, aLocation, aType, gImageTypes);
if (NS_FAILED(rv))
break;
rv = RegisterTypes(aCompMgr, catmgr, "view", aPath, aLocation, aType, gRDFTypes);
if (NS_FAILED(rv))
break;
rv = RegisterTypes(aCompMgr, catmgr, "view-source", aPath, aLocation, aType, gRDFTypes);
if (NS_FAILED(rv))
break;
} while (PR_FALSE);
return rv;
}
NS_IMETHODIMP
nsContentDLF::UnregisterDocumentFactories(nsIComponentManager* aCompMgr,
nsIFile* aPath,
const char* aRegistryLocation,
const nsModuleComponentInfo* aInfo)
{
// XXXwaterson seems like this leaves the registry pretty dirty.
nsresult rv;
nsCOMPtr<nsIComponentRegistrar> registrar = do_QueryInterface(aCompMgr, &rv);
if (NS_FAILED(rv))
return rv;
return registrar->UnregisterFactoryLocation(kDocumentFactoryImplCID, aPath);
}
/* static */ nsresult
nsContentDLF::EnsureUAStyleSheet()
{
if (gUAStyleSheet)
return NS_OK;
// Load the UA style sheet
nsCOMPtr<nsIURI> uri;
nsresult rv = NS_NewURI(getter_AddRefs(uri), NS_LITERAL_CSTRING(UA_CSS_URL));
if (NS_FAILED(rv)) {
#ifdef DEBUG
printf("*** open of %s failed: error=%x\n", UA_CSS_URL, rv);
#endif
return rv;
}
nsCOMPtr<nsICSSLoader> cssLoader;
NS_NewCSSLoader(getter_AddRefs(cssLoader));
if (!cssLoader)
return NS_ERROR_OUT_OF_MEMORY;
PRBool complete;
rv = cssLoader->LoadAgentSheet(uri, gUAStyleSheet, complete, nsnull);
#ifdef DEBUG
if (NS_FAILED(rv))
printf("*** open of %s failed: error=%x\n", UA_CSS_URL, rv);
#endif
return rv;
}
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