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fune/docshell/base/nsWebShell.cpp

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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim:set ts=2 sw=2 sts=2 cin et: */
/* ***** BEGIN LICENSE BLOCK *****
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Mozilla 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/MPL/
*
* 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):
* Travis Bogard <travis@netscape.com>
* Dan Rosen <dr@netscape.com>
*
* Alternatively, the contents of this file may be used under the terms of
* either of 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 MPL, 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 MPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK ***** */
#include "nsDocShell.h"
#include "nsWebShell.h"
#include "nsIWebBrowserChrome2.h"
#include "nsIInterfaceRequestor.h"
#include "nsIInterfaceRequestorUtils.h"
#include "nsIWebProgress.h"
#include "nsIContentViewer.h"
#include "nsIDocumentViewer.h"
#include "nsIMarkupDocumentViewer.h"
#include "nsIClipboardCommands.h"
#include "nsILinkHandler.h"
#include "nsIStreamListener.h"
#include "nsIPrompt.h"
#include "nsNetUtil.h"
#include "nsIRefreshURI.h"
#include "nsIDOMEvent.h"
#include "nsPresContext.h"
#include "nsIComponentManager.h"
#include "nsCRT.h"
#include "nsVoidArray.h"
#include "nsString.h"
#include "nsReadableUtils.h"
#include "prprf.h"
#include "nsIPluginHost.h"
#include "nsplugin.h"
#include "nsIPluginManager.h"
#include "nsCDefaultURIFixup.h"
#include "nsIContent.h"
#include "prlog.h"
#include "nsCOMPtr.h"
#include "nsIPresShell.h"
#include "nsIWebShellServices.h"
#include "nsIGlobalHistory.h"
#include "prmem.h"
#include "prthread.h"
#include "nsXPIDLString.h"
#include "nsDOMError.h"
#include "nsIDOMRange.h"
#include "nsIURIContentListener.h"
#include "nsIDOMDocument.h"
#include "nsIDOMHTMLAnchorElement.h"
#include "nsIBaseWindow.h"
#include "nsIDocShell.h"
#include "nsIDocShellTreeItem.h"
#include "nsIDocShellTreeNode.h"
#include "nsIDocShellTreeOwner.h"
#include "nsCURILoader.h"
#include "nsIDOMWindowInternal.h"
#include "nsEscape.h"
#include "nsIPlatformCharset.h"
#include "nsICharsetConverterManager.h"
#include "nsISocketTransportService.h"
#include "nsTextFormatter.h"
#include "nsPIDOMWindow.h"
#include "nsPICommandUpdater.h"
#include "nsIController.h"
#include "nsIFocusController.h"
#include "nsGUIEvent.h"
#include "nsISHistoryInternal.h"
#include "nsIHttpChannel.h"
#include "nsIHttpChannelInternal.h"
#include "nsIUploadChannel.h"
#include "nsISeekableStream.h"
#include "nsStreamUtils.h"
#include "nsThreadUtils.h"
#include "nsILocaleService.h"
#include "nsIStringBundle.h"
#include "nsICachingChannel.h"
#include "nsIDocument.h"
#include "nsITextToSubURI.h"
#include "nsIExternalProtocolService.h"
#include "nsCExternalHandlerService.h"
#include "nsIIDNService.h"
#include "nsIPrefBranch.h"
#include "nsIPrefService.h"
#include "nsITimer.h"
#include "nsIScriptSecurityManager.h"
#include "nsContentPolicyUtils.h"
#ifdef NS_DEBUG
/**
* Note: the log module is created during initialization which
* means that you cannot perform logging before then.
*/
static PRLogModuleInfo* gLogModule = PR_NewLogModule("webshell");
#endif
#define WEB_TRACE_CALLS 0x1
#define WEB_TRACE_HISTORY 0x2
#define WEB_LOG_TEST(_lm,_bit) (PRIntn((_lm)->level) & (_bit))
#ifdef NS_DEBUG
#define WEB_TRACE(_bit,_args) \
PR_BEGIN_MACRO \
if (WEB_LOG_TEST(gLogModule,_bit)) { \
PR_LogPrint _args; \
} \
PR_END_MACRO
#else
#define WEB_TRACE(_bit,_args)
#endif
//-----------------------------------------------------------------------------
#define PREF_PINGS_ENABLED "browser.send_pings"
#define PREF_PINGS_MAX_PER_LINK "browser.send_pings.max_per_link"
#define PREF_PINGS_REQUIRE_SAME_HOST "browser.send_pings.require_same_host"
// Check prefs to see if pings are enabled and if so what restrictions might
// be applied.
//
// @param maxPerLink
// This parameter returns the number of pings that are allowed per link click
//
// @param requireSameHost
// This parameter returns PR_TRUE if pings are restricted to the same host as
// the document in which the click occurs. If the same host restriction is
// imposed, then we still allow for pings to cross over to different
// protocols and ports for flexibility and because it is not possible to send
// a ping via FTP.
//
// @returns
// PR_TRUE if pings are enabled and PR_FALSE otherwise.
//
static PRBool
PingsEnabled(PRInt32 *maxPerLink, PRBool *requireSameHost)
{
PRBool allow = PR_FALSE;
*maxPerLink = 1;
*requireSameHost = PR_TRUE;
nsCOMPtr<nsIPrefBranch> prefs =
do_GetService(NS_PREFSERVICE_CONTRACTID);
if (prefs) {
PRBool val;
if (NS_SUCCEEDED(prefs->GetBoolPref(PREF_PINGS_ENABLED, &val)))
allow = val;
if (allow) {
prefs->GetIntPref(PREF_PINGS_MAX_PER_LINK, maxPerLink);
prefs->GetBoolPref(PREF_PINGS_REQUIRE_SAME_HOST, requireSameHost);
}
}
return allow;
}
static PRBool
CheckPingURI(nsIURI* uri, nsIContent* content)
{
if (!uri)
return PR_FALSE;
// Check with nsIScriptSecurityManager
nsCOMPtr<nsIScriptSecurityManager> ssmgr =
do_GetService(NS_SCRIPTSECURITYMANAGER_CONTRACTID);
NS_ENSURE_TRUE(ssmgr, PR_FALSE);
nsresult rv =
ssmgr->CheckLoadURIWithPrincipal(content->NodePrincipal(), uri,
nsIScriptSecurityManager::STANDARD);
if (NS_FAILED(rv)) {
return PR_FALSE;
}
// Ignore non-HTTP(S)
PRBool match;
if ((NS_FAILED(uri->SchemeIs("http", &match)) || !match) &&
(NS_FAILED(uri->SchemeIs("https", &match)) || !match)) {
return PR_FALSE;
}
// Check with contentpolicy
PRInt16 shouldLoad = nsIContentPolicy::ACCEPT;
nsIURI* docURI = nsnull;
nsIDocument* doc = content->GetOwnerDoc();
if (doc) {
docURI = doc->GetDocumentURI();
}
rv = NS_CheckContentLoadPolicy(nsIContentPolicy::TYPE_PING,
uri,
docURI,
content,
EmptyCString(), // mime hint
nsnull, //extra
&shouldLoad);
return NS_SUCCEEDED(rv) && NS_CP_ACCEPTED(shouldLoad);
}
typedef void (* ForEachPingCallback)(void *closure, nsIContent *content,
nsIURI *uri, nsIIOService *ios);
static void
ForEachPing(nsIContent *content, ForEachPingCallback callback, void *closure)
{
// NOTE: Using nsIDOMNSHTMLAnchorElement2::GetPing isn't really worth it here
// since we'd still need to parse the resulting string. Instead, we
// just parse the raw attribute. It might be nice if the content node
// implemented an interface that exposed an enumeration of nsIURIs.
// Make sure we are dealing with either an <A> or <AREA> element in the HTML
// or XHTML namespace.
if (!content->IsNodeOfType(nsINode::eHTML))
return;
nsIAtom *nameAtom = content->Tag();
if (!nameAtom->EqualsUTF8(NS_LITERAL_CSTRING("a")) &&
!nameAtom->EqualsUTF8(NS_LITERAL_CSTRING("area")))
return;
nsCOMPtr<nsIAtom> pingAtom = do_GetAtom("ping");
if (!pingAtom)
return;
nsAutoString value;
content->GetAttr(kNameSpaceID_None, pingAtom, value);
if (value.IsEmpty())
return;
nsCOMPtr<nsIIOService> ios = do_GetIOService();
if (!ios)
return;
nsIDocument *doc = content->GetOwnerDoc();
if (!doc)
return;
// value contains relative URIs split on spaces (U+0020)
const PRUnichar *start = value.BeginReading();
const PRUnichar *end = value.EndReading();
const PRUnichar *iter = start;
for (;;) {
if (iter < end && *iter != ' ') {
++iter;
} else { // iter is pointing at either end or a space
while (*start == ' ' && start < iter)
++start;
if (iter != start) {
nsCOMPtr<nsIURI> uri, baseURI = content->GetBaseURI();
ios->NewURI(NS_ConvertUTF16toUTF8(Substring(start, iter)),
doc->GetDocumentCharacterSet().get(),
baseURI, getter_AddRefs(uri));
if (CheckPingURI(uri, content)) {
callback(closure, content, uri, ios);
}
}
start = iter = iter + 1;
if (iter >= end)
break;
}
}
}
//----------------------------------------------------------------------
// We wait this many milliseconds before killing the ping channel...
#define PING_TIMEOUT 10000
static void
OnPingTimeout(nsITimer *timer, void *closure)
{
nsILoadGroup *loadGroup = static_cast<nsILoadGroup *>(closure);
loadGroup->Cancel(NS_ERROR_ABORT);
loadGroup->Release();
}
// Check to see if two URIs have the same host or not
static PRBool
IsSameHost(nsIURI *uri1, nsIURI *uri2)
{
nsCAutoString host1, host2;
uri1->GetAsciiHost(host1);
uri2->GetAsciiHost(host2);
return host1.Equals(host2);
}
class nsPingListener : public nsIStreamListener
, public nsIInterfaceRequestor
, public nsIChannelEventSink
{
public:
NS_DECL_ISUPPORTS
NS_DECL_NSIREQUESTOBSERVER
NS_DECL_NSISTREAMLISTENER
NS_DECL_NSIINTERFACEREQUESTOR
NS_DECL_NSICHANNELEVENTSINK
nsPingListener(PRBool requireSameHost, nsIContent* content)
: mRequireSameHost(requireSameHost),
mContent(content)
{}
private:
PRBool mRequireSameHost;
nsCOMPtr<nsIContent> mContent;
};
NS_IMPL_ISUPPORTS4(nsPingListener, nsIStreamListener, nsIRequestObserver,
nsIInterfaceRequestor, nsIChannelEventSink)
NS_IMETHODIMP
nsPingListener::OnStartRequest(nsIRequest *request, nsISupports *context)
{
return NS_OK;
}
NS_IMETHODIMP
nsPingListener::OnDataAvailable(nsIRequest *request, nsISupports *context,
nsIInputStream *stream, PRUint32 offset,
PRUint32 count)
{
PRUint32 result;
return stream->ReadSegments(NS_DiscardSegment, nsnull, count, &result);
}
NS_IMETHODIMP
nsPingListener::OnStopRequest(nsIRequest *request, nsISupports *context,
nsresult status)
{
return NS_OK;
}
NS_IMETHODIMP
nsPingListener::GetInterface(const nsIID &iid, void **result)
{
if (iid.Equals(NS_GET_IID(nsIChannelEventSink))) {
NS_ADDREF_THIS();
*result = (nsIChannelEventSink *) this;
return NS_OK;
}
return NS_ERROR_NO_INTERFACE;
}
NS_IMETHODIMP
nsPingListener::OnChannelRedirect(nsIChannel *oldChan, nsIChannel *newChan,
PRUint32 flags)
{
nsCOMPtr<nsIURI> newURI;
newChan->GetURI(getter_AddRefs(newURI));
if (!CheckPingURI(newURI, mContent))
return NS_ERROR_ABORT;
if (!mRequireSameHost)
return NS_OK;
nsCOMPtr<nsIURI> oldURI;
oldChan->GetURI(getter_AddRefs(oldURI));
NS_ENSURE_STATE(oldURI && newURI);
if (!IsSameHost(oldURI, newURI))
return NS_ERROR_ABORT;
return NS_OK;
}
struct SendPingInfo {
PRInt32 numPings;
PRInt32 maxPings;
PRBool requireSameHost;
nsIURI *referrer;
};
static void
SendPing(void *closure, nsIContent *content, nsIURI *uri, nsIIOService *ios)
{
SendPingInfo *info = static_cast<SendPingInfo *>(closure);
if (info->numPings >= info->maxPings)
return;
if (info->requireSameHost) {
// Make sure the referrer and the given uri share the same origin. We
// only require the same hostname. The scheme and port may differ.
if (!IsSameHost(uri, info->referrer))
return;
}
nsIDocument *doc = content->GetOwnerDoc();
if (!doc)
return;
nsCOMPtr<nsIChannel> chan;
ios->NewChannelFromURI(uri, getter_AddRefs(chan));
if (!chan)
return;
// Don't bother caching the result of this URI load.
chan->SetLoadFlags(nsIRequest::INHIBIT_CACHING);
nsCOMPtr<nsIHttpChannel> httpChan = do_QueryInterface(chan);
if (!httpChan)
return;
// This is needed in order for 3rd-party cookie blocking to work.
nsCOMPtr<nsIHttpChannelInternal> httpInternal = do_QueryInterface(httpChan);
if (httpInternal)
httpInternal->SetDocumentURI(doc->GetDocumentURI());
if (info->referrer)
httpChan->SetReferrer(info->referrer);
httpChan->SetRequestMethod(NS_LITERAL_CSTRING("POST"));
// Remove extraneous request headers (to reduce request size)
httpChan->SetRequestHeader(NS_LITERAL_CSTRING("accept"),
EmptyCString(), PR_FALSE);
httpChan->SetRequestHeader(NS_LITERAL_CSTRING("accept-language"),
EmptyCString(), PR_FALSE);
httpChan->SetRequestHeader(NS_LITERAL_CSTRING("accept-charset"),
EmptyCString(), PR_FALSE);
httpChan->SetRequestHeader(NS_LITERAL_CSTRING("accept-encoding"),
EmptyCString(), PR_FALSE);
nsCOMPtr<nsIUploadChannel> uploadChan = do_QueryInterface(httpChan);
if (!uploadChan)
return;
// To avoid sending an unnecessary Content-Type header, we encode the
// closing portion of the headers in the POST body.
NS_NAMED_LITERAL_CSTRING(uploadData, "Content-Length: 0\r\n\r\n");
nsCOMPtr<nsIInputStream> uploadStream;
NS_NewPostDataStream(getter_AddRefs(uploadStream), PR_FALSE,
uploadData, 0);
if (!uploadStream)
return;
uploadChan->SetUploadStream(uploadStream, EmptyCString(), -1);
// The channel needs to have a loadgroup associated with it, so that we can
// cancel the channel and any redirected channels it may create.
nsCOMPtr<nsILoadGroup> loadGroup =
do_CreateInstance(NS_LOADGROUP_CONTRACTID);
if (!loadGroup)
return;
chan->SetLoadGroup(loadGroup);
// Construct a listener that merely discards any response. If successful at
// opening the channel, then it is not necessary to hold a reference to the
// channel. The networking subsystem will take care of that for us.
nsCOMPtr<nsIStreamListener> listener =
new nsPingListener(info->requireSameHost, content);
if (!listener)
return;
// Observe redirects as well:
nsCOMPtr<nsIInterfaceRequestor> callbacks = do_QueryInterface(listener);
NS_ASSERTION(callbacks, "oops");
loadGroup->SetNotificationCallbacks(callbacks);
chan->AsyncOpen(listener, nsnull);
// Even if AsyncOpen failed, we still count this as a successful ping. It's
// possible that AsyncOpen may have failed after triggering some background
// process that may have written something to the network.
info->numPings++;
// Prevent ping requests from stalling and never being garbage collected...
nsCOMPtr<nsITimer> timer =
do_CreateInstance(NS_TIMER_CONTRACTID);
if (timer) {
nsresult rv = timer->InitWithFuncCallback(OnPingTimeout, loadGroup,
PING_TIMEOUT,
nsITimer::TYPE_ONE_SHOT);
if (NS_SUCCEEDED(rv)) {
// When the timer expires, the callback function will release this
// reference to the loadgroup.
static_cast<nsILoadGroup *>(loadGroup.get())->AddRef();
loadGroup = 0;
}
}
// If we failed to setup the timer, then we should just cancel the channel
// because we won't be able to ensure that it goes away in a timely manner.
if (loadGroup)
chan->Cancel(NS_ERROR_ABORT);
}
// Spec: http://whatwg.org/specs/web-apps/current-work/#ping
static void
DispatchPings(nsIContent *content, nsIURI *referrer)
{
SendPingInfo info;
if (!PingsEnabled(&info.maxPings, &info.requireSameHost))
return;
if (info.maxPings == 0)
return;
info.numPings = 0;
info.referrer = referrer;
ForEachPing(content, SendPing, &info);
}
//----------------------------------------------------------------------
// Note: operator new zeros our memory
nsWebShell::nsWebShell() : nsDocShell()
{
#ifdef DEBUG
// We're counting the number of |nsWebShells| to help find leaks
++gNumberOfWebShells;
#endif
#ifdef DEBUG
printf("++WEBSHELL %p == %ld\n", (void*) this, gNumberOfWebShells);
#endif
InitFrameData();
mItemType = typeContent;
mCharsetReloadState = eCharsetReloadInit;
}
nsWebShell::~nsWebShell()
{
Destroy();
++mRefCnt; // following releases can cause this destructor to be called
// recursively if the refcount is allowed to remain 0
mContentViewer=nsnull;
mDeviceContext=nsnull;
InitFrameData();
#ifdef DEBUG
// We're counting the number of |nsWebShells| to help find leaks
--gNumberOfWebShells;
#endif
#ifdef DEBUG
printf("--WEBSHELL %p == %ld\n", (void*) this, gNumberOfWebShells);
#endif
}
void nsWebShell::InitFrameData()
{
SetMarginWidth(-1);
SetMarginHeight(-1);
}
nsresult
nsWebShell::EnsureCommandHandler()
{
if (!mCommandManager)
{
mCommandManager = do_CreateInstance("@mozilla.org/embedcomp/command-manager;1");
if (!mCommandManager) return NS_ERROR_OUT_OF_MEMORY;
nsCOMPtr<nsPICommandUpdater> commandUpdater = do_QueryInterface(mCommandManager);
if (!commandUpdater) return NS_ERROR_FAILURE;
nsCOMPtr<nsIDOMWindow> domWindow = do_GetInterface(static_cast<nsIInterfaceRequestor *>(this));
#ifdef DEBUG
nsresult rv =
#endif
commandUpdater->Init(domWindow);
NS_ASSERTION(NS_SUCCEEDED(rv), "Initting command manager failed");
}
return mCommandManager ? NS_OK : NS_ERROR_FAILURE;
}
NS_IMPL_ADDREF_INHERITED(nsWebShell, nsDocShell)
NS_IMPL_RELEASE_INHERITED(nsWebShell, nsDocShell)
NS_INTERFACE_MAP_BEGIN(nsWebShell)
NS_INTERFACE_MAP_ENTRY(nsIWebShellServices)
NS_INTERFACE_MAP_ENTRY(nsILinkHandler)
NS_INTERFACE_MAP_ENTRY(nsIClipboardCommands)
NS_INTERFACE_MAP_END_INHERITING(nsDocShell)
NS_IMETHODIMP
nsWebShell::GetInterface(const nsIID &aIID, void** aInstancePtr)
{
NS_PRECONDITION(aInstancePtr, "null out param");
*aInstancePtr = nsnull;
if(aIID.Equals(NS_GET_IID(nsICommandManager)))
{
NS_ENSURE_SUCCESS(EnsureCommandHandler(), NS_ERROR_FAILURE);
*aInstancePtr = mCommandManager;
NS_ADDREF((nsISupports*) *aInstancePtr);
return NS_OK;
}
return nsDocShell::GetInterface(aIID, aInstancePtr);
}
nsEventStatus PR_CALLBACK
nsWebShell::HandleEvent(nsGUIEvent *aEvent)
{
return nsEventStatus_eIgnore;
}
//----------------------------------------------------------------------
// Web Shell Services API
//This functions is only called when a new charset is detected in loading a document.
//Its name should be changed to "CharsetReloadDocument"
NS_IMETHODIMP
nsWebShell::ReloadDocument(const char* aCharset,
PRInt32 aSource)
{
// XXX hack. kee the aCharset and aSource wait to pick it up
nsCOMPtr<nsIContentViewer> cv;
NS_ENSURE_SUCCESS(GetContentViewer(getter_AddRefs(cv)), NS_ERROR_FAILURE);
if (cv)
{
nsCOMPtr<nsIMarkupDocumentViewer> muDV = do_QueryInterface(cv);
if (muDV)
{
PRInt32 hint;
muDV->GetHintCharacterSetSource(&hint);
if( aSource > hint )
{
muDV->SetHintCharacterSet(nsDependentCString(aCharset));
muDV->SetHintCharacterSetSource(aSource);
if(eCharsetReloadRequested != mCharsetReloadState)
{
mCharsetReloadState = eCharsetReloadRequested;
return Reload(LOAD_FLAGS_CHARSET_CHANGE);
}
}
}
}
//return failer if this request is not accepted due to mCharsetReloadState
return NS_ERROR_WEBSHELL_REQUEST_REJECTED;
}
NS_IMETHODIMP
nsWebShell::StopDocumentLoad(void)
{
if(eCharsetReloadRequested != mCharsetReloadState)
{
Stop(nsIWebNavigation::STOP_ALL);
return NS_OK;
}
//return failer if this request is not accepted due to mCharsetReloadState
return NS_ERROR_WEBSHELL_REQUEST_REJECTED;
}
NS_IMETHODIMP
nsWebShell::SetRendering(PRBool aRender)
{
if(eCharsetReloadRequested != mCharsetReloadState)
{
if (mContentViewer) {
mContentViewer->SetEnableRendering(aRender);
return NS_OK;
}
}
//return failer if this request is not accepted due to mCharsetReloadState
return NS_ERROR_WEBSHELL_REQUEST_REJECTED;
}
//----------------------------------------------------------------------
// WebShell link handling
class OnLinkClickEvent : public nsRunnable {
public:
OnLinkClickEvent(nsWebShell* aHandler, nsIContent* aContent,
nsIURI* aURI,
const PRUnichar* aTargetSpec,
nsIInputStream* aPostDataStream = 0,
nsIInputStream* aHeadersDataStream = 0);
NS_IMETHOD Run() {
nsCOMPtr<nsPIDOMWindow> window(do_QueryInterface(mHandler->mScriptGlobal));
nsAutoPopupStatePusher popupStatePusher(window, mPopupState);
mHandler->OnLinkClickSync(mContent, mURI,
mTargetSpec.get(), mPostDataStream,
mHeadersDataStream,
nsnull, nsnull);
return NS_OK;
}
private:
nsRefPtr<nsWebShell> mHandler;
nsCOMPtr<nsIURI> mURI;
nsString mTargetSpec;
nsCOMPtr<nsIInputStream> mPostDataStream;
nsCOMPtr<nsIInputStream> mHeadersDataStream;
nsCOMPtr<nsIContent> mContent;
PopupControlState mPopupState;
};
OnLinkClickEvent::OnLinkClickEvent(nsWebShell* aHandler,
nsIContent *aContent,
nsIURI* aURI,
const PRUnichar* aTargetSpec,
nsIInputStream* aPostDataStream,
nsIInputStream* aHeadersDataStream)
: mHandler(aHandler)
, mURI(aURI)
, mTargetSpec(aTargetSpec)
, mPostDataStream(aPostDataStream)
, mHeadersDataStream(aHeadersDataStream)
, mContent(aContent)
{
nsCOMPtr<nsPIDOMWindow> window(do_QueryInterface(mHandler->mScriptGlobal));
mPopupState = window->GetPopupControlState();
}
//----------------------------------------
NS_IMETHODIMP
nsWebShell::OnLinkClick(nsIContent* aContent,
nsIURI* aURI,
const PRUnichar* aTargetSpec,
nsIInputStream* aPostDataStream,
nsIInputStream* aHeadersDataStream)
{
NS_ASSERTION(NS_IsMainThread(), "wrong thread");
if (mFiredUnloadEvent) {
return NS_OK;
}
if (aContent->IsEditable()) {
return NS_OK;
}
nsCOMPtr<nsIRunnable> ev =
new OnLinkClickEvent(this, aContent, aURI, aTargetSpec,
aPostDataStream, aHeadersDataStream);
return NS_DispatchToCurrentThread(ev);
}
NS_IMETHODIMP
nsWebShell::OnLinkClickSync(nsIContent *aContent,
nsIURI* aURI,
const PRUnichar* aTargetSpec,
nsIInputStream* aPostDataStream,
nsIInputStream* aHeadersDataStream,
nsIDocShell** aDocShell,
nsIRequest** aRequest)
{
// Initialize the DocShell / Request
if (aDocShell) {
*aDocShell = nsnull;
}
if (aRequest) {
*aRequest = nsnull;
}
if (mFiredUnloadEvent) {
return NS_OK;
}
if (aContent->IsEditable()) {
return NS_OK;
}
{
// defer to an external protocol handler if necessary...
nsCOMPtr<nsIExternalProtocolService> extProtService = do_GetService(NS_EXTERNALPROTOCOLSERVICE_CONTRACTID);
if (extProtService) {
nsCAutoString scheme;
aURI->GetScheme(scheme);
if (!scheme.IsEmpty()) {
// if the URL scheme does not correspond to an exposed protocol, then we
// need to hand this link click over to the external protocol handler.
PRBool isExposed;
nsresult rv = extProtService->IsExposedProtocol(scheme.get(), &isExposed);
if (NS_SUCCEEDED(rv) && !isExposed) {
return extProtService->LoadUrl(aURI);
}
}
}
}
nsCOMPtr<nsIDOMNode> node(do_QueryInterface(aContent));
NS_ENSURE_TRUE(node, NS_ERROR_UNEXPECTED);
PRBool inherit;
nsresult rv = URIInheritsSecurityContext(aURI, &inherit);
if (NS_FAILED(rv) || inherit) {
nsCOMPtr<nsIDocument> sourceDoc = aContent->GetDocument();
if (!sourceDoc) {
// The source is in a 'zombie' document, or not part of a
// document any more. Don't let it perform loads in this docshell.
// XXXbz why only for the inherit case?
return NS_OK;
}
nsCOMPtr<nsIPresShell> presShell;
GetPresShell(getter_AddRefs(presShell));
NS_ENSURE_TRUE(presShell, NS_ERROR_FAILURE);
if (presShell->GetDocument() != sourceDoc) {
// The source is not in the current document, don't let it load anything
// that would inherit the principals of the current document.
return NS_OK;
}
}
// Get the owner document of the link that was clicked, this will be
// the document that the link is in, or the last document that the
// link was in. From that document, we'll get the URI to use as the
// referer, since the current URI in this webshell/docshell may be a
// new document that we're in the process of loading.
nsCOMPtr<nsIDOMDocument> refererOwnerDoc;
node->GetOwnerDocument(getter_AddRefs(refererOwnerDoc));
nsCOMPtr<nsIDocument> refererDoc(do_QueryInterface(refererOwnerDoc));
NS_ENSURE_TRUE(refererDoc, NS_ERROR_UNEXPECTED);
nsCOMPtr<nsIURI> referer = refererDoc->GetDocumentURI();
// referer could be null here in some odd cases, but that's ok,
// we'll just load the link w/o sending a referer in those cases.
nsAutoString target(aTargetSpec);
// If this is an anchor element, grab its type property to use as a hint
nsAutoString typeHint;
nsCOMPtr<nsIDOMHTMLAnchorElement> anchor(do_QueryInterface(aContent));
if (anchor) {
anchor->GetType(typeHint);
}
rv = InternalLoad(aURI, // New URI
referer, // Referer URI
nsnull, // No onwer
INTERNAL_LOAD_FLAGS_INHERIT_OWNER, // Inherit owner from document
target.get(), // Window target
NS_LossyConvertUTF16toASCII(typeHint).get(),
aPostDataStream, // Post data stream
aHeadersDataStream, // Headers stream
LOAD_LINK, // Load type
nsnull, // No SHEntry
PR_TRUE, // first party site
aDocShell, // DocShell out-param
aRequest); // Request out-param
if (NS_SUCCEEDED(rv)) {
DispatchPings(aContent, referer);
}
return rv;
}
NS_IMETHODIMP
nsWebShell::OnOverLink(nsIContent* aContent,
nsIURI* aURI,
const PRUnichar* aTargetSpec)
{
if (aContent->IsEditable()) {
return NS_OK;
}
nsCOMPtr<nsIWebBrowserChrome2> browserChrome2 = do_GetInterface(mTreeOwner);
nsresult rv = NS_ERROR_FAILURE;
nsCOMPtr<nsIWebBrowserChrome> browserChrome;
if (!browserChrome2) {
browserChrome = do_GetInterface(mTreeOwner);
if (!browserChrome)
return rv;
}
nsCOMPtr<nsITextToSubURI> textToSubURI =
do_GetService(NS_ITEXTTOSUBURI_CONTRACTID, &rv);
if (NS_FAILED(rv))
return rv;
// use url origin charset to unescape the URL
nsCAutoString charset;
rv = aURI->GetOriginCharset(charset);
NS_ENSURE_SUCCESS(rv, rv);
nsCAutoString spec;
rv = aURI->GetSpec(spec);
NS_ENSURE_SUCCESS(rv, rv);
nsAutoString uStr;
rv = textToSubURI->UnEscapeURIForUI(charset, spec, uStr);
NS_ENSURE_SUCCESS(rv, rv);
if (browserChrome2) {
nsCOMPtr<nsIDOMElement> element = do_QueryInterface(aContent);
rv = browserChrome2->SetStatusWithContext(nsIWebBrowserChrome::STATUS_LINK,
uStr, element);
} else {
rv = browserChrome->SetStatus(nsIWebBrowserChrome::STATUS_LINK, uStr.get());
}
return rv;
}
NS_IMETHODIMP
nsWebShell::OnLeaveLink()
{
nsCOMPtr<nsIWebBrowserChrome> browserChrome(do_GetInterface(mTreeOwner));
nsresult rv = NS_ERROR_FAILURE;
if (browserChrome) {
rv = browserChrome->SetStatus(nsIWebBrowserChrome::STATUS_LINK,
EmptyString().get());
}
return rv;
}
NS_IMETHODIMP
nsWebShell::GetLinkState(nsIURI* aLinkURI, nsLinkState& aState)
{
if (!aLinkURI) {
// No uri means not a link
aState = eLinkState_NotLink;
return NS_OK;
}
aState = eLinkState_Unvisited;
// no history, leave state unchanged
if (!mGlobalHistory)
return NS_OK;
PRBool isVisited;
NS_ENSURE_SUCCESS(mGlobalHistory->IsVisited(aLinkURI, &isVisited),
NS_ERROR_FAILURE);
if (isVisited)
aState = eLinkState_Visited;
return NS_OK;
}
//----------------------------------------------------------------------
nsresult nsWebShell::EndPageLoad(nsIWebProgress *aProgress,
nsIChannel* channel,
nsresult aStatus)
{
nsresult rv = NS_OK;
if(!channel)
return NS_ERROR_NULL_POINTER;
nsCOMPtr<nsIURI> url;
rv = channel->GetURI(getter_AddRefs(url));
if (NS_FAILED(rv)) return rv;
// clean up reload state for meta charset
if(eCharsetReloadRequested == mCharsetReloadState)
mCharsetReloadState = eCharsetReloadStopOrigional;
else
mCharsetReloadState = eCharsetReloadInit;
// Save a pointer to the currently-loading history entry.
// nsDocShell::EndPageLoad will clear mLSHE, but we may need this history
// entry further down in this method.
nsCOMPtr<nsISHEntry> loadingSHE = mLSHE;
//
// one of many safeguards that prevent death and destruction if
// someone is so very very rude as to bring this window down
// during this load handler.
//
nsCOMPtr<nsIDocShell> kungFuDeathGrip(this);
nsDocShell::EndPageLoad(aProgress, channel, aStatus);
// Test if this is the top frame or a subframe
PRBool isTopFrame = PR_TRUE;
nsCOMPtr<nsIDocShellTreeItem> targetParentTreeItem;
rv = GetSameTypeParent(getter_AddRefs(targetParentTreeItem));
if (NS_SUCCEEDED(rv) && targetParentTreeItem)
{
isTopFrame = PR_FALSE;
}
//
// If the page load failed, then deal with the error condition...
// Errors are handled as follows:
// 1. Check to see if it's a file not found error or bad content
// encoding error.
// 2. Send the URI to a keyword server (if enabled)
// 3. If the error was DNS failure, then add www and .com to the URI
// (if appropriate).
// 4. Throw an error dialog box...
//
if (url && NS_FAILED(aStatus))
{
if (aStatus == NS_ERROR_FILE_NOT_FOUND ||
aStatus == NS_ERROR_INVALID_CONTENT_ENCODING)
{
DisplayLoadError(aStatus, url, nsnull, channel);
return NS_OK;
}
if (sURIFixup)
{
//
// Try and make an alternative URI from the old one
//
nsCOMPtr<nsIURI> newURI;
nsCAutoString oldSpec;
url->GetSpec(oldSpec);
//
// First try keyword fixup
//
if (aStatus == NS_ERROR_UNKNOWN_HOST && mAllowKeywordFixup)
{
PRBool keywordsEnabled = PR_FALSE;
if (mPrefs && NS_FAILED(mPrefs->GetBoolPref("keyword.enabled", &keywordsEnabled)))
keywordsEnabled = PR_FALSE;
nsCAutoString host;
url->GetHost(host);
nsCAutoString scheme;
url->GetScheme(scheme);
PRInt32 dotLoc = host.FindChar('.');
// we should only perform a keyword search under the following conditions:
// (0) Pref keyword.enabled is true
// (1) the url scheme is http (or https)
// (2) the url does not have a protocol scheme
// If we don't enforce such a policy, then we end up doing keyword searchs on urls
// we don't intend like imap, file, mailbox, etc. This could lead to a security
// problem where we send data to the keyword server that we shouldn't be.
// Someone needs to clean up keywords in general so we can determine on a per url basis
// if we want keywords enabled...this is just a bandaid...
if (keywordsEnabled && !scheme.IsEmpty() &&
(scheme.Find("http") != 0)) {
keywordsEnabled = PR_FALSE;
}
if(keywordsEnabled && (kNotFound == dotLoc)) {
// only send non-qualified hosts to the keyword server
//
// If this string was passed through nsStandardURL by chance, then it
// may have been converted from UTF-8 to ACE, which would result in a
// completely bogus keyword query. Here we try to recover the
// original Unicode value, but this is not 100% correct since the
// value may have been normalized per the IDN normalization rules.
//
// Since we don't have access to the exact original string that was
// entered by the user, this will just have to do.
//
PRBool isACE;
nsCAutoString utf8Host;
nsCOMPtr<nsIIDNService> idnSrv =
do_GetService(NS_IDNSERVICE_CONTRACTID);
if (idnSrv &&
NS_SUCCEEDED(idnSrv->IsACE(host, &isACE)) && isACE &&
NS_SUCCEEDED(idnSrv->ConvertACEtoUTF8(host, utf8Host)))
sURIFixup->KeywordToURI(utf8Host, getter_AddRefs(newURI));
else
sURIFixup->KeywordToURI(host, getter_AddRefs(newURI));
} // end keywordsEnabled
}
//
// Now try change the address, e.g. turn http://foo into http://www.foo.com
//
if (aStatus == NS_ERROR_UNKNOWN_HOST ||
aStatus == NS_ERROR_NET_RESET)
{
PRBool doCreateAlternate = PR_TRUE;
// Skip fixup for anything except a normal document load operation on
// the topframe.
if (mLoadType != LOAD_NORMAL || !isTopFrame)
{
doCreateAlternate = PR_FALSE;
}
else
{
// Test if keyword lookup produced a new URI or not
if (newURI)
{
PRBool sameURI = PR_FALSE;
url->Equals(newURI, &sameURI);
if (!sameURI)
{
// Keyword lookup made a new URI so no need to try an
// alternate one.
doCreateAlternate = PR_FALSE;
}
}
}
if (doCreateAlternate)
{
newURI = nsnull;
sURIFixup->CreateFixupURI(oldSpec,
nsIURIFixup::FIXUP_FLAGS_MAKE_ALTERNATE_URI, getter_AddRefs(newURI));
}
}
//
// Did we make a new URI that is different to the old one? If so load it.
//
if (newURI)
{
// Make sure the new URI is different from the old one, otherwise
// there's little point trying to load it again.
PRBool sameURI = PR_FALSE;
url->Equals(newURI, &sameURI);
if (!sameURI)
{
nsCAutoString newSpec;
newURI->GetSpec(newSpec);
NS_ConvertUTF8toUTF16 newSpecW(newSpec);
// This seems evil, since it is modifying the original URL
rv = url->SetSpec(newSpec);
if (NS_FAILED(rv)) return rv;
return LoadURI(newSpecW.get(), // URI string
LOAD_FLAGS_NONE, // Load flags
nsnull, // Referring URI
nsnull, // Post data stream
nsnull); // Headers stream
}
}
}
//
// Well, fixup didn't work :-(
// It is time to throw an error dialog box, and be done with it...
//
// Errors to be shown only on top-level frames
if ((aStatus == NS_ERROR_UNKNOWN_HOST ||
aStatus == NS_ERROR_CONNECTION_REFUSED ||
aStatus == NS_ERROR_UNKNOWN_PROXY_HOST ||
aStatus == NS_ERROR_PROXY_CONNECTION_REFUSED) &&
(isTopFrame || mUseErrorPages)) {
DisplayLoadError(aStatus, url, nsnull, channel);
}
// Errors to be shown for any frame
else if (aStatus == NS_ERROR_NET_TIMEOUT ||
aStatus == NS_ERROR_REDIRECT_LOOP ||
aStatus == NS_ERROR_UNKNOWN_SOCKET_TYPE ||
aStatus == NS_ERROR_NET_INTERRUPT ||
aStatus == NS_ERROR_NET_RESET ||
NS_ERROR_GET_MODULE(aStatus) == NS_ERROR_MODULE_SECURITY) {
DisplayLoadError(aStatus, url, nsnull, channel);
}
else if (aStatus == NS_ERROR_DOCUMENT_NOT_CACHED) {
/* A document that was requested to be fetched *only* from
* the cache is not in cache. May be this is one of those
* postdata results. Throw a dialog to the user,
* saying that the page has expired from cache and ask if
* they wish to refetch the page from the net. Do this only
* if the request is a form post.
*/
nsCOMPtr<nsIHttpChannel> httpChannel(do_QueryInterface(channel));
nsCAutoString method;
if (httpChannel)
httpChannel->GetRequestMethod(method);
if (method.Equals("POST") && !NS_IsOffline()) {
PRBool repost;
rv = ConfirmRepost(&repost);
if (NS_FAILED(rv)) return rv;
// If the user pressed cancel in the dialog, return. Don't try to load
// the page without the post data.
if (!repost)
return NS_OK;
// The user wants to repost the data to the server.
// If the page was loaded due to a back/forward/go
// operation, update the session history index.
// This is similar to the updating done in
// nsDocShell::OnNewURI() for regular pages
nsCOMPtr<nsISHistory> rootSH=mSessionHistory;
if (!mSessionHistory) {
nsCOMPtr<nsIDocShellTreeItem> root;
//Get the root docshell
GetSameTypeRootTreeItem(getter_AddRefs(root));
if (root) {
// QI root to nsIWebNavigation
nsCOMPtr<nsIWebNavigation> rootAsWebnav(do_QueryInterface(root));
if (rootAsWebnav) {
// Get the handle to SH from the root docshell
rootAsWebnav->GetSessionHistory(getter_AddRefs(rootSH));
}
}
} // mSessionHistory
if (rootSH && (mLoadType & LOAD_CMD_HISTORY)) {
nsCOMPtr<nsISHistoryInternal> shInternal(do_QueryInterface(rootSH));
if (shInternal) {
rootSH->GetIndex(&mPreviousTransIndex);
shInternal->UpdateIndex();
rootSH->GetIndex(&mLoadedTransIndex);
#ifdef DEBUG_PAGE_CACHE
printf("Previous index: %d, Loaded index: %d\n\n",
mPreviousTransIndex, mLoadedTransIndex);
#endif
}
}
// Make it look like we really did honestly finish loading the
// history page we were loading, since the "reload" load we're
// about to kick off will reload our current history entry. This
// is a bit of a hack, and if the force-load fails I think we'll
// end up being confused about what page we're on... but we would
// anyway, since we've updated the session history index above.
SetHistoryEntry(&mOSHE, loadingSHE);
// The user does want to repost the data to the server.
// Initiate a new load again.
// Get the postdata if any from the channel.
nsCOMPtr<nsIInputStream> inputStream;
nsCOMPtr<nsIURI> referrer;
if (channel) {
nsCOMPtr<nsIHttpChannel> httpChannel(do_QueryInterface(channel));
if(httpChannel) {
httpChannel->GetReferrer(getter_AddRefs(referrer));
nsCOMPtr<nsIUploadChannel> uploadChannel(do_QueryInterface(channel));
if (uploadChannel) {
uploadChannel->GetUploadStream(getter_AddRefs(inputStream));
}
}
}
nsCOMPtr<nsISeekableStream> postDataSeekable(do_QueryInterface(inputStream));
if (postDataSeekable)
{
postDataSeekable->Seek(nsISeekableStream::NS_SEEK_SET, 0);
}
InternalLoad(url, // URI
referrer, // Referring URI
nsnull, // Owner
INTERNAL_LOAD_FLAGS_INHERIT_OWNER, // Inherit owner
nsnull, // No window target
nsnull, // No type hint
inputStream, // Post data stream
nsnull, // No headers stream
LOAD_RELOAD_BYPASS_PROXY_AND_CACHE,// Load type
nsnull, // No SHEntry
PR_TRUE, // first party site
nsnull, // No nsIDocShell
nsnull); // No nsIRequest
}
else {
DisplayLoadError(aStatus, url, nsnull, channel);
}
}
} // if we have a host
return NS_OK;
}
//
// Routines for selection and clipboard
//
#ifdef XP_MAC
#pragma mark -
#endif
nsresult
nsWebShell::GetControllerForCommand ( const char * inCommand, nsIController** outController )
{
NS_ENSURE_ARG_POINTER(outController);
*outController = nsnull;
nsresult rv = NS_ERROR_FAILURE;
nsCOMPtr<nsPIDOMWindow> window ( do_QueryInterface(mScriptGlobal) );
if ( window ) {
nsIFocusController *focusController = window->GetRootFocusController();
if ( focusController )
rv = focusController->GetControllerForCommand ( inCommand, outController );
} // if window
return rv;
} // GetControllerForCommand
nsresult
nsWebShell::IsCommandEnabled ( const char * inCommand, PRBool* outEnabled )
{
NS_ENSURE_ARG_POINTER(outEnabled);
*outEnabled = PR_FALSE;
nsresult rv = NS_ERROR_FAILURE;
nsCOMPtr<nsIController> controller;
rv = GetControllerForCommand ( inCommand, getter_AddRefs(controller) );
if ( controller )
rv = controller->IsCommandEnabled(inCommand, outEnabled);
return rv;
}
nsresult
nsWebShell::DoCommand ( const char * inCommand )
{
nsresult rv = NS_ERROR_FAILURE;
nsCOMPtr<nsIController> controller;
rv = GetControllerForCommand ( inCommand, getter_AddRefs(controller) );
if ( controller )
rv = controller->DoCommand(inCommand);
return rv;
}
NS_IMETHODIMP
nsWebShell::CanCutSelection(PRBool* aResult)
{
return IsCommandEnabled ( "cmd_cut", aResult );
}
NS_IMETHODIMP
nsWebShell::CanCopySelection(PRBool* aResult)
{
return IsCommandEnabled ( "cmd_copy", aResult );
}
NS_IMETHODIMP
nsWebShell::CanCopyLinkLocation(PRBool* aResult)
{
return IsCommandEnabled ( "cmd_copyLink", aResult );
}
NS_IMETHODIMP
nsWebShell::CanCopyImageLocation(PRBool* aResult)
{
return IsCommandEnabled ( "cmd_copyImageLocation",
aResult );
}
NS_IMETHODIMP
nsWebShell::CanCopyImageContents(PRBool* aResult)
{
return IsCommandEnabled ( "cmd_copyImageContents",
aResult );
}
NS_IMETHODIMP
nsWebShell::CanPaste(PRBool* aResult)
{
return IsCommandEnabled ( "cmd_paste", aResult );
}
NS_IMETHODIMP
nsWebShell::CutSelection(void)
{
return DoCommand ( "cmd_cut" );
}
NS_IMETHODIMP
nsWebShell::CopySelection(void)
{
return DoCommand ( "cmd_copy" );
}
NS_IMETHODIMP
nsWebShell::CopyLinkLocation(void)
{
return DoCommand ( "cmd_copyLink" );
}
NS_IMETHODIMP
nsWebShell::CopyImageLocation(void)
{
return DoCommand ( "cmd_copyImageLocation" );
}
NS_IMETHODIMP
nsWebShell::CopyImageContents(void)
{
return DoCommand ( "cmd_copyImageContents" );
}
NS_IMETHODIMP
nsWebShell::Paste(void)
{
return DoCommand ( "cmd_paste" );
}
NS_IMETHODIMP
nsWebShell::SelectAll(void)
{
return DoCommand ( "cmd_selectAll" );
}
//
// SelectNone
//
// Collapses the current selection, insertion point ends up at beginning
// of previous selection.
//
NS_IMETHODIMP
nsWebShell::SelectNone(void)
{
return DoCommand ( "cmd_selectNone" );
}
#ifdef XP_MAC
#pragma mark -
#endif
//*****************************************************************************
// nsWebShell::nsIBaseWindow
//*****************************************************************************
NS_IMETHODIMP nsWebShell::Create()
{
if (mPrefs) {
// We've already been created
return NS_OK;
}
WEB_TRACE(WEB_TRACE_CALLS,
("nsWebShell::Init: this=%p", this));
return nsDocShell::Create();
}
#ifdef DEBUG
unsigned long nsWebShell::gNumberOfWebShells = 0;
#endif
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