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gecko-dev/extensions/xforms/nsXFormsMessageElement.cpp
Olli.Pettay%helsinki.fi 953736e2f6 Bug 348689, fixes to xf:message, p=surkov, r=me+doron
2006-08-30 15:41:29 +00:00

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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* ***** 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 XForms support.
*
* The Initial Developer of the Original Code is
* Olli Pettay.
* Portions created by the Initial Developer are Copyright (C) 2004
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
* Olli Pettay <Olli.Pettay@helsinki.fi> (original author)
*
* 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 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 "nsXFormsAtoms.h"
#include "nsXFormsStubElement.h"
#include "nsXFormsDelegateStub.h"
#include "nsXFormsActionElement.h"
#include "nsIXFormsActionModuleElement.h"
#include "nsIDOMText.h"
#include "nsIDOM3Node.h"
#include "nsIDOMElement.h"
#include "nsIDOMNodeList.h"
#include "nsIDOMDocument.h"
#include "nsIDOMNSDocument.h"
#include "nsIDOMDocumentView.h"
#include "nsIDOMAbstractView.h"
#include "nsIDOMHTMLDocument.h"
#include "nsIDOMWindowInternal.h"
#include "nsIDOMDOMImplementation.h"
#include "nsIDOMEvent.h"
#include "nsIDOMMouseEvent.h"
#include "nsIDOMEventTarget.h"
#include "nsIDOMEventListener.h"
#include "nsIDOMViewCSS.h"
#include "nsIDOMCSSValue.h"
#include "nsIDOMCSSPrimitiveValue.h"
#include "nsIDOMCSSStyleDeclaration.h"
#include "nsITimer.h"
#include "nsIDocument.h"
#include "nsIBoxObject.h"
#include "nsIServiceManager.h"
#include "prmem.h"
#include "plbase64.h"
#include "nsAutoPtr.h"
#include "nsIStringBundle.h"
#include "nsIDOMSerializer.h"
#include "nsIServiceManager.h"
#include "nsIDelegateInternal.h"
#include "nsISupportsArray.h"
#include "nsISupportsPrimitives.h"
#include "nsNetUtil.h"
#include "nsIDOMDocumentEvent.h"
#include "nsIChannelEventSink.h"
#include "nsIXFormsEphemeralMessageUI.h"
#define MESSAGE_WINDOW_PROPERTIES \
"location=false,scrollbars=yes,centerscreen"
#define MESSAGE_WINDOW_URL \
"chrome://xforms/content/xforms-message.xul"
// Defining a simple dialog for modeless and modal messages.
#define SHOW_EPHEMERAL_TIMEOUT 750
#define HIDE_EPHEMERAL_TIMEOUT 5000
#define EPHEMERAL_POSITION_RESET_TIMEOUT 100
class nsXFormsEventListener;
/**
* Implementation of the XForms \<message\> element.
*
* @see http://www.w3.org/TR/xforms/slice10.html#action-info
*/
class nsXFormsMessageElement : public nsXFormsDelegateStub,
public nsIDOMEventListener,
public nsIXFormsActionModuleElement,
public nsIStreamListener,
public nsIInterfaceRequestor,
public nsIChannelEventSink
{
public:
NS_DECL_ISUPPORTS_INHERITED
// nsIXFormsDelegate
NS_IMETHOD GetValue(nsAString& aValue);
// nsIXTFElement overrides
NS_IMETHOD OnCreated(nsIXTFBindableElementWrapper *aWrapper);
NS_IMETHOD WillChangeDocument(nsIDOMDocument *aNewDocument);
NS_IMETHOD OnDestroyed();
NS_IMETHOD ParentChanged(nsIDOMElement *aNewParent);
NS_IMETHOD WillChangeParent(nsIDOMElement *aNewParent);
NS_IMETHOD AttributeSet(nsIAtom *aName, const nsAString &aSrc);
NS_IMETHOD AttributeRemoved(nsIAtom *aName);
NS_IMETHOD DoneAddingChildren();
NS_DECL_NSICHANNELEVENTSINK
NS_DECL_NSIREQUESTOBSERVER
NS_DECL_NSISTREAMLISTENER
NS_DECL_NSIINTERFACEREQUESTOR
NS_DECL_NSIDOMEVENTLISTENER
NS_DECL_NSIXFORMSACTIONMODULEELEMENT
// Start the timer, which is used to set the message visible
void StartEphemeral();
// Set the message visible and start timer to hide it later.
void ShowEphemeral();
// Hide the ephemeral message.
void HideEphemeral();
// Reset the position of the ephemeral message.
void ResetEphemeralPosition()
{
mPosX = mPosY = -1;
}
enum MessageType {
eType_Normal,
eType_Hint,
eType_Help,
eType_Alert
};
enum StopType {
eStopType_None,
eStopType_Security,
eStopType_LinkError
};
nsXFormsMessageElement(MessageType aType) :
mType(aType), mPosX(-1), mPosY(-1), mDocument(nsnull),
mStopType(eStopType_None), mSrcAttrText(""),
mDoneAddingChildren(PR_FALSE) {}
private:
nsresult HandleEphemeralMessage(nsIDOMDocument* aDoc, nsIDOMEvent* aEvent);
nsresult HandleModalAndModelessMessage(nsIDOMDocument* aDoc, nsAString& aLevel);
void CloneNode(nsIDOMNode* aSrc, nsIDOMNode** aTarget);
PRBool HandleInlineAlert(nsIDOMEvent* aEvent);
nsresult ConstructMessageWindowURL(const nsAString& aData,
PRBool aIsLink,
/*out*/ nsAString& aURL);
/**
* Begin the process of testing to see if this message element could get held
* up later by linking to an external resource. Run this when the element is
* set up and it will try to access any external resource that this message
* may later try to access. If we can't get to it by the time the message
* is triggered, then throw a xforms-link-error.
*/
nsresult TestExternalFile();
/**
* Either add or subtract from the number of messages with external resources
* currently loading in this document. aAdd == PR_TRUE will add to the total
* otherwise we will subtract from the total (as long as it isn't already 0).
*/
void AddRemoveExternalResource(PRBool aAdd);
/**
* Determine if the message is Ephemeral.
*/
PRBool IsEphemeral();
MessageType mType;
// The position of the ephemeral message
PRInt32 mPosX;
PRInt32 mPosY;
nsCOMPtr<nsITimer> mEphemeralTimer;
nsIDOMDocument* mDocument;
nsCOMPtr<nsIChannel> mChannel;
StopType mStopType;
nsCString mSrcAttrText;
PRBool mDoneAddingChildren;
};
NS_IMPL_ADDREF_INHERITED(nsXFormsMessageElement, nsXFormsDelegateStub)
NS_IMPL_RELEASE_INHERITED(nsXFormsMessageElement, nsXFormsDelegateStub)
NS_INTERFACE_MAP_BEGIN(nsXFormsMessageElement)
NS_INTERFACE_MAP_ENTRY(nsIChannelEventSink)
NS_INTERFACE_MAP_ENTRY(nsIInterfaceRequestor)
NS_INTERFACE_MAP_ENTRY(nsIStreamListener)
NS_INTERFACE_MAP_ENTRY(nsIXFormsActionModuleElement)
NS_INTERFACE_MAP_ENTRY(nsIDOMEventListener)
NS_INTERFACE_MAP_END_INHERITING(nsXFormsDelegateStub)
// nsIXTFElement
NS_IMETHODIMP
nsXFormsMessageElement::OnCreated(nsIXTFBindableElementWrapper *aWrapper)
{
nsresult rv = nsXFormsDelegateStub::OnCreated(aWrapper);
NS_ENSURE_SUCCESS(rv, rv);
aWrapper->SetNotificationMask(kStandardNotificationMask |
nsIXTFElement::NOTIFY_WILL_CHANGE_PARENT |
nsIXTFElement::NOTIFY_DONE_ADDING_CHILDREN);
return NS_OK;
}
NS_IMETHODIMP
nsXFormsMessageElement::WillChangeDocument(nsIDOMDocument *aNewDocument)
{
if (mDocument) {
if (mEphemeralTimer) {
mEphemeralTimer->Cancel();
mEphemeralTimer = nsnull;
}
nsCOMPtr<nsIDocument> doc(do_QueryInterface(mDocument));
if (doc) {
nsXFormsMessageElement *msg =
NS_STATIC_CAST(nsXFormsMessageElement*,
doc->GetProperty(nsXFormsAtoms::messageProperty));
if (msg == this)
doc->UnsetProperty(nsXFormsAtoms::messageProperty);
}
// If we are currently trying to load an external message, cancel the
// request.
if (mChannel) {
mChannel->Cancel(NS_BINDING_ABORTED);
}
}
mDocument = aNewDocument;
return nsXFormsDelegateStub::WillChangeDocument(aNewDocument);
}
NS_IMETHODIMP
nsXFormsMessageElement::OnDestroyed()
{
mChannel = nsnull;
mDocument = nsnull;
return nsXFormsDelegateStub::OnDestroyed();
}
NS_IMETHODIMP
nsXFormsMessageElement::HandleEvent(nsIDOMEvent* aEvent)
{
return nsXFormsUtils::EventHandlingAllowed(aEvent, mElement) ?
HandleAction(aEvent, nsnull) : NS_OK;
}
void
nsXFormsMessageElement::CloneNode(nsIDOMNode* aSrc, nsIDOMNode** aTarget)
{
nsAutoString ns;
nsAutoString localName;
aSrc->GetNamespaceURI(ns);
aSrc->GetLocalName(localName);
// Clone the visual content of the <output>.
// According to the XForms Schema it is enough
// to support <output> here.
if (ns.EqualsLiteral(NS_NAMESPACE_XFORMS) &&
localName.EqualsLiteral("output")) {
nsCOMPtr<nsIDelegateInternal> outEl(do_QueryInterface(aSrc));
if (outEl) {
nsCOMPtr<nsIDOMDocument> doc;
aSrc->GetOwnerDocument(getter_AddRefs(doc));
if (doc) {
nsCOMPtr<nsIDOMText> text;
nsAutoString value;
outEl->GetValue(value);
doc->CreateTextNode(value, getter_AddRefs(text));
NS_IF_ADDREF(*aTarget = text);
}
}
return;
}
// Clone other elements
aSrc->CloneNode(PR_FALSE, aTarget);
if (!*aTarget)
return;
// Add the new children
nsCOMPtr<nsIDOMNode> tmp;
nsCOMPtr<nsIDOMNodeList> childNodes;
aSrc->GetChildNodes(getter_AddRefs(childNodes));
PRUint32 count = 0;
if (childNodes)
childNodes->GetLength(&count);
for (PRUint32 i = 0; i < count; ++i) {
nsCOMPtr<nsIDOMNode> child;
childNodes->Item(i, getter_AddRefs(child));
if (child) {
nsCOMPtr<nsIDOMNode> clone;
CloneNode(child, getter_AddRefs(clone));
if (clone)
(*aTarget)->AppendChild(clone, getter_AddRefs(tmp));
}
}
}
NS_IMETHODIMP
nsXFormsMessageElement::WillChangeParent(nsIDOMElement *aNewParent)
{
if (mType == eType_Normal)
return nsXFormsDelegateStub::WillChangeParent(aNewParent);
nsCOMPtr<nsIDOMNode> parent;
mElement->GetParentNode(getter_AddRefs(parent));
if (!parent)
return nsXFormsDelegateStub::WillChangeParent(aNewParent);
nsCOMPtr<nsIDOMEventTarget> targ(do_QueryInterface(parent));
NS_ENSURE_STATE(targ);
if (mType == eType_Hint) {
targ->RemoveEventListener(NS_LITERAL_STRING("xforms-hint"), this, PR_FALSE);
targ->RemoveEventListener(NS_LITERAL_STRING("xforms-moz-hint-off"),
this, PR_FALSE);
} else if (mType == eType_Help) {
targ->RemoveEventListener(NS_LITERAL_STRING("xforms-help"), this, PR_FALSE);
} else if (mType == eType_Alert) {
targ->RemoveEventListener(NS_LITERAL_STRING("xforms-invalid"), this, PR_TRUE);
targ->RemoveEventListener(NS_LITERAL_STRING("xforms-out-of-range"), this, PR_TRUE);
targ->RemoveEventListener(NS_LITERAL_STRING("xforms-binding-exception"),this, PR_TRUE);
}
return nsXFormsDelegateStub::WillChangeParent(aNewParent);
}
NS_IMETHODIMP
nsXFormsMessageElement::ParentChanged(nsIDOMElement *aNewParent)
{
if (mType == eType_Normal || !aNewParent)
return nsXFormsDelegateStub::ParentChanged(aNewParent);
nsCOMPtr<nsIDOMEventTarget> targ(do_QueryInterface(aNewParent));
NS_ENSURE_STATE(targ);
if (mType == eType_Hint) {
targ->AddEventListener(NS_LITERAL_STRING("xforms-hint"), this, PR_FALSE);
targ->AddEventListener(NS_LITERAL_STRING("xforms-moz-hint-off"),
this, PR_FALSE);
} else if (mType == eType_Help) {
targ->AddEventListener(NS_LITERAL_STRING("xforms-help"), this, PR_FALSE);
} else if (mType == eType_Alert) {
// Adding listeners for error events, which have a form control as a target.
targ->AddEventListener(NS_LITERAL_STRING("xforms-invalid"), this, PR_TRUE);
targ->AddEventListener(NS_LITERAL_STRING("xforms-out-of-range"), this, PR_TRUE);
targ->AddEventListener(NS_LITERAL_STRING("xforms-binding-exception"), this, PR_TRUE);
}
return nsXFormsDelegateStub::ParentChanged(aNewParent);
}
NS_IMETHODIMP
nsXFormsMessageElement::AttributeSet(nsIAtom *aName, const nsAString &aValue)
{
if (mDoneAddingChildren) {
if (aName == nsXFormsAtoms::src) {
// If we are currently trying to load an external message, cancel the
// request.
if (mChannel) {
mChannel->Cancel(NS_BINDING_ABORTED);
}
mStopType = eStopType_None;
// The src attribute has changed so retest the external file.
TestExternalFile();
}
}
return nsXFormsDelegateStub::AttributeSet(aName, aValue);
}
NS_IMETHODIMP
nsXFormsMessageElement::AttributeRemoved(nsIAtom *aName)
{
if (mDoneAddingChildren) {
if (aName == nsXFormsAtoms::src) {
// If we are currently trying to test an external resource, cancel the
// request.
if (mChannel) {
mChannel->Cancel(NS_BINDING_ABORTED);
}
mSrcAttrText.Truncate();
mStopType = eStopType_None;
}
}
return nsXFormsDelegateStub::AttributeRemoved(aName);
}
NS_IMETHODIMP
nsXFormsMessageElement::DoneAddingChildren()
{
mDoneAddingChildren = PR_TRUE;
TestExternalFile();
return NS_OK;
}
NS_IMETHODIMP
nsXFormsMessageElement::HandleAction(nsIDOMEvent* aEvent,
nsIXFormsActionElement *aParentAction)
{
if (!mElement)
return NS_OK;
// If TestExternalFile fails, then there is an external link that we need
// to use that we can't reach right now. If it won't load, then might as
// well stop here. We don't want to be popping up empty windows
// or windows that will just end up showing 404 messages.
// We also stop if we were not allowed to access the given resource.
if (mStopType == eStopType_LinkError ||
mStopType == eStopType_Security) {
// we couldn't successfully link to our external resource. Better throw
// the xforms-link-error event
nsCOMPtr<nsIModelElementPrivate> modelPriv =
nsXFormsUtils::GetModel(mElement);
nsCOMPtr<nsIDOMNode> model = do_QueryInterface(modelPriv);
nsXFormsUtils::DispatchEvent(model, eEvent_LinkError);
return NS_OK;
}
// If there is still a channel, then someone must have changed the value of
// the src attribute since the document finished loading and we haven't yet
// determined whether the new link is valid or not. For now we'll assume
// that the value is good rather than returning a link error. Also
// canceling the channel since it is too late now.
if (mChannel) {
mChannel->Cancel(NS_BINDING_ABORTED);
}
if (mType != eType_Normal) {
nsCOMPtr<nsIDOMEventTarget> target;
if (mType == eType_Alert) {
// Alert should fire only if target is the parent element.
aEvent->GetTarget(getter_AddRefs(target));
} else {
// If <help> or <hint> is inside <action>, we don't want to fire them,
// unless xforms-help/xforms-hint is dispatched to the <action>.
aEvent->GetCurrentTarget(getter_AddRefs(target));
}
nsCOMPtr<nsIDOMNode> targetNode(do_QueryInterface(target));
nsCOMPtr<nsIDOMNode> parent;
mElement->GetParentNode(getter_AddRefs(parent));
if (!parent || targetNode != parent)
return NS_OK;
}
nsAutoString level;
switch (mType) {
case eType_Normal:
mElement->GetAttribute(NS_LITERAL_STRING("level"), level);
break;
case eType_Hint:
level.AssignLiteral("ephemeral");
// Using the innermost <hint>.
aEvent->StopPropagation();
break;
case eType_Help:
level.AssignLiteral("modeless");
// <help> is equivalent to a
// <message level="modeless" ev:event="xforms-help" ev:propagate="stop>.
aEvent->StopPropagation();
aEvent->PreventDefault();
break;
case eType_Alert:
if (HandleInlineAlert(aEvent))
return NS_OK;
level.AssignLiteral("modal");
break;
}
if (level.IsEmpty())
return NS_OK;
nsCOMPtr<nsIDOMDocument> doc;
mElement->GetOwnerDocument(getter_AddRefs(doc));
return level.EqualsLiteral("ephemeral")
? HandleEphemeralMessage(doc, aEvent)
: HandleModalAndModelessMessage(doc, level);
}
PRBool
nsXFormsMessageElement::HandleInlineAlert(nsIDOMEvent* aEvent)
{
nsCOMPtr<nsIDOMDocument> doc;
nsCOMPtr<nsIDOMWindowInternal> internal;
mElement->GetOwnerDocument(getter_AddRefs(doc));
nsXFormsUtils::GetWindowFromDocument(doc, getter_AddRefs(internal));
if (!internal) {
return PR_FALSE;
}
nsCOMPtr<nsIDOMViewCSS> cssView(do_QueryInterface(internal));
if (!cssView)
return PR_FALSE;
nsAutoString tmp;
nsCOMPtr<nsIDOMCSSStyleDeclaration> styles;
cssView->GetComputedStyle(mElement, tmp, getter_AddRefs(styles));
nsCOMPtr<nsIDOMCSSValue> display;
styles->GetPropertyCSSValue(NS_LITERAL_STRING("display"),
getter_AddRefs(display));
if (display) {
nsCOMPtr<nsIDOMCSSPrimitiveValue> displayValue(do_QueryInterface(display));
if (displayValue) {
nsAutoString type;
displayValue->GetStringValue(type);
return !type.EqualsLiteral("none");
}
}
return PR_FALSE;
}
nsresult
nsXFormsMessageElement::HandleEphemeralMessage(nsIDOMDocument* aDoc,
nsIDOMEvent* aEvent)
{
if (!aEvent)
return NS_OK;
nsAutoString eventType;
aEvent->GetType(eventType);
if (mType == eType_Hint) {
// If this is a <hint> element, try to make it work more like a tooltip:
// - if we get an xforms-moz-hint-off event, hide the element.
// - if the <hint> is active and we get a new xforms-hint, then do nothing.
nsCOMPtr<nsIDocument> doc(do_QueryInterface(aDoc));
if (!doc)
return NS_OK;
nsXFormsMessageElement *msg =
NS_STATIC_CAST(nsXFormsMessageElement*,
doc->GetProperty(nsXFormsAtoms::messageProperty));
if (msg == this) {
if (eventType.EqualsLiteral("xforms-moz-hint-off")) {
if (mEphemeralTimer) {
mEphemeralTimer->Cancel();
mEphemeralTimer = nsnull;
}
doc->UnsetProperty(nsXFormsAtoms::messageProperty);
nsCOMPtr<nsIXFormsEphemeralMessageUI> ui(do_QueryInterface(mElement));
if (ui) {
ui->Hide();
}
ResetEphemeralPosition();
}
return NS_OK;
}
}
/// @bug How to handle the following:
/// <message level="ephemeral" src="http://mozilla.org"/>
nsCOMPtr<nsIDOMEventTarget> target;
aEvent->GetTarget(getter_AddRefs(target));
nsCOMPtr<nsIDOMElement> targetEl(do_QueryInterface(target));
if (targetEl) {
nsCOMPtr<nsIDOMNSDocument> nsDoc(do_QueryInterface(aDoc));
if (nsDoc) {
PRInt32 oldX = mPosX;
PRInt32 oldY = mPosY;
nsCOMPtr<nsIBoxObject> box;
nsDoc->GetBoxObjectFor(targetEl, getter_AddRefs(box));
if (box) {
box->GetX(&mPosX);
box->GetY(&mPosY);
PRInt32 height;
box->GetHeight(&height);
mPosX += 10;
mPosY = mPosY + height;
// Move the ephemeral message a bit upwards if the
// box object of the event target is large enough.
// This makes it more clear to which element the
// message is related to.
if (height > 20)
mPosY -= height > 30 ? 10 : 10 - (30 - height);
}
// A special case for hints to make them work more like
// normal tooltips.
if (eventType.EqualsLiteral("xforms-hint") &&
mPosX == oldX && mPosY == oldY) {
return NS_OK;
}
StartEphemeral();
}
}
return NS_OK;
}
nsresult
nsXFormsMessageElement::HandleModalAndModelessMessage(nsIDOMDocument* aDoc,
nsAString& aLevel)
{
nsCOMPtr<nsIDOMWindowInternal> internal;
nsXFormsUtils::GetWindowFromDocument(aDoc, getter_AddRefs(internal));
if (!internal) {
return NS_OK;
}
nsAutoString messageURL;
// Order of precedence is single-node binding, linking attribute then
// inline text.
nsAutoString instanceData;
PRBool hasBinding = nsXFormsUtils::GetSingleNodeBindingValue(mElement,
instanceData);
nsAutoString options;
options.AssignLiteral(MESSAGE_WINDOW_PROPERTIES);
nsAutoString src;
if (!hasBinding) {
mElement->GetAttribute(NS_LITERAL_STRING("src"), src);
}
nsresult rv;
if (!hasBinding && !src.IsEmpty()) {
// Creating a normal window for messages with src attribute.
options.AppendLiteral(",chrome=no,resizable");
// Create a new URI so that we properly convert relative urls to absolute.
nsCOMPtr<nsIDocument> doc(do_QueryInterface(aDoc));
NS_ENSURE_STATE(doc);
nsCOMPtr<nsIURI> uri;
NS_NewURI(getter_AddRefs(uri), src, doc->GetDocumentCharacterSet().get(),
doc->GetDocumentURI());
NS_ENSURE_STATE(uri);
nsCAutoString uriSpec;
uri->GetSpec(uriSpec);
messageURL = NS_ConvertUTF8toUTF16(uriSpec);
} else {
// Cloning the content of the xf:message and creating a
// dialog for it.
options.AppendLiteral(",dialog,chrome,dependent");
nsCOMPtr<nsIDOMDocument> ddoc;
nsCOMPtr<nsIDOMDOMImplementation> domImpl;
rv = aDoc->GetImplementation(getter_AddRefs(domImpl));
NS_ENSURE_SUCCESS(rv, rv);
rv = domImpl->CreateDocument(EmptyString(), EmptyString(), nsnull,
getter_AddRefs(ddoc));
NS_ENSURE_SUCCESS(rv, rv);
if (!ddoc)
return NS_OK;
nsCOMPtr<nsIDOMNode> tmp;
nsCOMPtr<nsIDOMElement> htmlEl;
rv = ddoc->CreateElementNS(NS_LITERAL_STRING(NS_NAMESPACE_XHTML),
NS_LITERAL_STRING("html"),
getter_AddRefs(htmlEl));
NS_ENSURE_SUCCESS(rv, rv);
htmlEl->SetAttribute(NS_LITERAL_STRING("style"),
NS_LITERAL_STRING("background-color: -moz-Dialog;"));
ddoc->AppendChild(htmlEl, getter_AddRefs(tmp));
nsCOMPtr<nsIDOMElement> bodyEl;
rv = ddoc->CreateElementNS(NS_LITERAL_STRING(NS_NAMESPACE_XHTML),
NS_LITERAL_STRING("body"),
getter_AddRefs(bodyEl));
NS_ENSURE_SUCCESS(rv, rv);
htmlEl->AppendChild(bodyEl, getter_AddRefs(tmp));
// If we have a binding, it is enough to show a simple message
if (hasBinding) {
nsCOMPtr<nsIDOM3Node> body3(do_QueryInterface(bodyEl));
if (body3)
body3->SetTextContent(instanceData);
} else {
// Otherwise copying content from the original document to
// the modeless/modal message document.
nsCOMPtr<nsIDOMNode> tmp;
nsCOMPtr<nsIDOMNodeList> childNodes;
mElement->GetChildNodes(getter_AddRefs(childNodes));
PRUint32 count = 0;
if (childNodes)
childNodes->GetLength(&count);
for (PRUint32 i = 0; i < count; ++i) {
nsCOMPtr<nsIDOMNode> child;
childNodes->Item(i, getter_AddRefs(child));
if (child) {
nsCOMPtr<nsIDOMNode> clone;
CloneNode(child, getter_AddRefs(clone));
if (clone)
bodyEl->AppendChild(clone, getter_AddRefs(tmp));
}
}
}
nsCOMPtr<nsIDOMSerializer> serializer =
do_CreateInstance(NS_XMLSERIALIZER_CONTRACTID, &rv);
NS_ENSURE_SUCCESS(rv, rv);
nsAutoString docString;
rv = serializer->SerializeToString(ddoc, docString);
NS_ENSURE_SUCCESS(rv, rv);
char* b64 =
PL_Base64Encode(NS_ConvertUTF16toUTF8(docString).get(), 0, nsnull);
if (!b64) {
return NS_ERROR_FAILURE;
}
nsCAutoString b64String;
b64String.AppendLiteral("data:application/vnd.mozilla.xul+xml;base64,");
b64String.Append(b64);
PR_Free(b64);
CopyUTF8toUTF16(b64String, messageURL);
}
if (aLevel.EqualsLiteral("modal"))
options.AppendLiteral(",modal");
nsCOMPtr<nsISupportsString> arg(
do_CreateInstance("@mozilla.org/supports-string;1", &rv));
if (!arg)
return rv;
arg->SetData(messageURL);
nsCOMPtr<nsISupportsArray> args(
do_CreateInstance("@mozilla.org/supports-array;1", &rv));
if (!args)
return rv;
args->AppendElement(arg);
nsCOMPtr<nsIDOMWindow> messageWindow;
// The 2nd argument is the window name, and if a window with the name exists,
// it gets reused. Using "_blank" makes sure we get a new window each time.
internal->OpenDialog(NS_LITERAL_STRING(MESSAGE_WINDOW_URL),
NS_LITERAL_STRING("_blank"), options, args,
getter_AddRefs(messageWindow));
return NS_OK;
}
void
sEphemeralCallbackShow(nsITimer *aTimer, void *aListener)
{
nsXFormsMessageElement* self =
NS_STATIC_CAST(nsXFormsMessageElement*, aListener);
if (self)
self->ShowEphemeral();
}
void
sEphemeralCallbackHide(nsITimer *aTimer, void *aListener)
{
nsXFormsMessageElement* self =
NS_STATIC_CAST(nsXFormsMessageElement*, aListener);
if (self)
self->HideEphemeral();
}
void
sEphemeralCallbackResetPosition(nsITimer *aTimer, void *aListener)
{
nsXFormsMessageElement* self =
NS_STATIC_CAST(nsXFormsMessageElement*, aListener);
if (self)
self->ResetEphemeralPosition();
}
void
nsXFormsMessageElement::StartEphemeral()
{
HideEphemeral();
if (!mElement)
return;
nsCOMPtr<nsIDOMDocument> domdoc;
mElement->GetOwnerDocument(getter_AddRefs(domdoc));
nsCOMPtr<nsIDocument> doc(do_QueryInterface(domdoc));
if (!doc)
return;
doc->SetProperty(nsXFormsAtoms::messageProperty, this);
mEphemeralTimer = do_CreateInstance(NS_TIMER_CONTRACTID);
if (mEphemeralTimer)
mEphemeralTimer->InitWithFuncCallback(sEphemeralCallbackShow, this,
SHOW_EPHEMERAL_TIMEOUT,
nsITimer::TYPE_ONE_SHOT);
}
void
nsXFormsMessageElement::ShowEphemeral()
{
if (mEphemeralTimer) {
mEphemeralTimer->Cancel();
mEphemeralTimer = nsnull;
}
if (!mElement)
return;
nsCOMPtr<nsIXFormsEphemeralMessageUI> ui(do_QueryInterface(mElement));
if (ui) {
ui->Show(mPosX, mPosY);
}
mEphemeralTimer = do_CreateInstance(NS_TIMER_CONTRACTID);
if (mEphemeralTimer)
mEphemeralTimer->InitWithFuncCallback(sEphemeralCallbackHide, this,
HIDE_EPHEMERAL_TIMEOUT,
nsITimer::TYPE_ONE_SHOT);
}
void
nsXFormsMessageElement::HideEphemeral()
{
if (mEphemeralTimer) {
mEphemeralTimer->Cancel();
mEphemeralTimer = nsnull;
}
if (!mElement)
return;
nsCOMPtr<nsIDOMDocument> domdoc;
mElement->GetOwnerDocument(getter_AddRefs(domdoc));
nsCOMPtr<nsIDocument> doc(do_QueryInterface(domdoc));
if (!doc)
return;
nsXFormsMessageElement *msg =
NS_STATIC_CAST(nsXFormsMessageElement*,
doc->GetProperty(nsXFormsAtoms::messageProperty));
if (msg && msg != this) {
msg->HideEphemeral();
return;
}
doc->UnsetProperty(nsXFormsAtoms::messageProperty);
nsCOMPtr<nsIXFormsEphemeralMessageUI> ui(do_QueryInterface(mElement));
if (ui) {
ui->Hide();
}
mEphemeralTimer = do_CreateInstance(NS_TIMER_CONTRACTID);
if (mEphemeralTimer)
mEphemeralTimer->InitWithFuncCallback(sEphemeralCallbackResetPosition,
this,
EPHEMERAL_POSITION_RESET_TIMEOUT,
nsITimer::TYPE_ONE_SHOT);
}
nsresult
nsXFormsMessageElement::TestExternalFile()
{
// Let's see if checking for any external resources is even necessary. Single
// node binding trumps linking attributes in order of precendence. If we
// find single node binding in evidence, then return NS_OK to show that
// this message element has access to the info that it needs.
nsAutoString snb;
mElement->GetAttribute(NS_LITERAL_STRING("bind"), snb);
if (!snb.IsEmpty()) {
return NS_OK;
}
mElement->GetAttribute(NS_LITERAL_STRING("ref"), snb);
if (!snb.IsEmpty()) {
return NS_OK;
}
// if no linking attribute, no need to go on
nsAutoString src;
mElement->GetAttribute(NS_LITERAL_STRING("src"), src);
if (src.IsEmpty()) {
return NS_OK;
}
nsCOMPtr<nsIDOMDocument> domDoc;
mElement->GetOwnerDocument(getter_AddRefs(domDoc));
nsCOMPtr<nsIDocument> doc(do_QueryInterface(domDoc));
NS_ENSURE_STATE(doc);
nsCOMPtr<nsIURI> uri;
NS_NewURI(getter_AddRefs(uri), src, doc->GetDocumentCharacterSet().get(),
doc->GetDocumentURI());
NS_ENSURE_STATE(uri);
if (!nsXFormsUtils::CheckConnectionAllowed(mElement, uri)) {
nsAutoString tagName;
mElement->GetLocalName(tagName);
const PRUnichar *strings[] = { tagName.get() };
nsXFormsUtils::ReportError(NS_LITERAL_STRING("externalLinkLoadOrigin"),
strings, 1, mElement, mElement);
// Keep the the dialog from popping up. Won't be able to reach the
// resource anyhow.
mStopType = eStopType_Security;
return NS_ERROR_FAILURE;
}
nsCOMPtr<nsILoadGroup> loadGroup = doc->GetDocumentLoadGroup();
NS_WARN_IF_FALSE(loadGroup, "No load group!");
// Using the same load group as the main document and creating
// the channel with LOAD_NORMAL flag delays the dispatching of
// the 'load' event until message data document has been loaded.
nsresult rv = NS_NewChannel(getter_AddRefs(mChannel), uri, nsnull, loadGroup,
this, nsIRequest::LOAD_NORMAL);
NS_ENSURE_TRUE(mChannel, rv);
// See if it's an http channel. We'll look at the http status code more
// closely and only request the "HEAD" to keep the response small.
// Especially since we are requesting this for every message in the document
// and in most cases we pass off the URL to another browser service to
// get and display the message so no good to try to look at the contents
// anyway.
nsCOMPtr<nsIHttpChannel> httpChannel = do_QueryInterface(mChannel);
if (httpChannel) {
if (!IsEphemeral()) {
PRBool isReallyHTTP = PR_FALSE;
uri->SchemeIs("http", &isReallyHTTP);
if (!isReallyHTTP) {
uri->SchemeIs("https", &isReallyHTTP);
}
if (isReallyHTTP) {
httpChannel->SetRequestMethod(NS_LITERAL_CSTRING("HEAD"));
}
}
}
rv = mChannel->AsyncOpen(this, nsnull);
if (NS_FAILED(rv)) {
mChannel = nsnull;
// URI doesn't exist; report error.
// set up the error strings
nsAutoString tagName;
mElement->GetLocalName(tagName);
const PRUnichar *strings[] = { src.get(), tagName.get() };
nsXFormsUtils::ReportError(NS_LITERAL_STRING("externalLink1Error"),
strings, 2, mElement, mElement);
mStopType = eStopType_LinkError;
return NS_ERROR_FAILURE;
}
// channel should be running along smoothly, increment the count
AddRemoveExternalResource(PR_TRUE);
return NS_OK;
}
NS_IMETHODIMP
nsXFormsMessageElement::GetValue(nsAString& aValue)
{
// The order of precedence for determining the text of the message
// is: single node binding, linking, inline text (8.3.5). We cache
// the value of the external message (via mSrcAttrText) for hints
// and ephemeral messages.
nsXFormsDelegateStub::GetValue(aValue);
if (aValue.IsVoid()) {
if (!mSrcAttrText.IsEmpty()) {
// handle linking ('src') attribute
aValue = NS_ConvertUTF8toUTF16(mSrcAttrText);
}
else {
// Return inline value
nsCOMPtr<nsIDOM3Node> node = do_QueryInterface(mElement);
if (node) {
node->GetTextContent(aValue);
}
}
}
return NS_OK;
}
// nsIInterfaceRequestor
NS_IMETHODIMP
nsXFormsMessageElement::GetInterface(const nsIID &aIID, void **aResult)
{
*aResult = nsnull;
return QueryInterface(aIID, aResult);
}
// nsIChannelEventSink
NS_IMETHODIMP
nsXFormsMessageElement::OnChannelRedirect(nsIChannel *OldChannel,
nsIChannel *aNewChannel,
PRUint32 aFlags)
{
NS_PRECONDITION(aNewChannel, "Redirect without a channel?");
nsCOMPtr<nsIURI> newURI;
nsresult rv = aNewChannel->GetURI(getter_AddRefs(newURI));
NS_ENSURE_SUCCESS(rv, rv);
if (!nsXFormsUtils::CheckConnectionAllowed(mElement, newURI)) {
nsAutoString tagName;
mElement->GetLocalName(tagName);
const PRUnichar *strings[] = { tagName.get() };
nsXFormsUtils::ReportError(NS_LITERAL_STRING("externalLinkLoadOrigin"),
strings, 1, mElement, mElement);
mStopType = eStopType_Security;
return NS_ERROR_ABORT;
}
return NS_OK;
}
// nsIStreamListener
NS_IMETHODIMP
nsXFormsMessageElement::OnStartRequest(nsIRequest *aRequest,
nsISupports *aContext)
{
// Make sure to null out mChannel before we return. Keep in mind that
// if this is the last message channel to be loaded for the xforms
// document then when AddRemoveExternalResource is called, it may result
// in xforms-ready firing. Should there be a message acting as a handler
// for xforms-ready, it will start the logic to display itself
// (HandleAction()). So we can't call AddRemoveExternalResource to remove
// this channel from the count until we've set the mStopType to be the
// proper value. Entering this function, mStopType will be eStopType_None,
// so if we need mStopType to be any other value (like in an error
// condition), please make sure it is set before AddRemoveExternalResource
// is called.
NS_ASSERTION(aRequest == mChannel, "unexpected request");
NS_ASSERTION(mChannel, "no channel");
if (!mElement) {
AddRemoveExternalResource(PR_FALSE);
mChannel = nsnull;
return NS_BINDING_ABORTED;
}
nsresult status;
nsresult rv = mChannel->GetStatus(&status);
// DNS errors and other obvious problems will return failure status
if (NS_FAILED(rv) || NS_FAILED(status)) {
// NS_BINDING_ABORTED means that we have been cancelled by a later
// AttributeSet() call (which will also reset mStopType), so don't
// treat it like an error.
if (status != NS_BINDING_ABORTED) {
nsAutoString src, tagName;
mElement->GetLocalName(tagName);
mElement->GetAttribute(NS_LITERAL_STRING("src"), src);
const PRUnichar *strings[] = { tagName.get(), src.get() };
nsXFormsUtils::ReportError(NS_LITERAL_STRING("externalLink2Error"),
strings, 2, mElement, mElement);
mStopType = eStopType_LinkError;
}
AddRemoveExternalResource(PR_FALSE);
mChannel = nsnull;
return NS_BINDING_ABORTED;
}
// If status is zero, it might still be an error if it's http:
// http has data even when there's an error like a 404.
nsCOMPtr<nsIHttpChannel> httpChannel = do_QueryInterface(mChannel);
if (httpChannel) {
// If responseStatus is 2xx, it is valid.
// 3xx (various flavors of redirection) COULD be successful. Can't really
// follow those to conclusion so we'll assume they were successful.
// If responseStatus is 4xx or 5xx, it is an error.
PRUint32 responseStatus;
rv = httpChannel->GetResponseStatus(&responseStatus);
if (NS_FAILED(rv) || (responseStatus >= 400)) {
nsAutoString src, tagName;
mElement->GetLocalName(tagName);
mElement->GetAttribute(NS_LITERAL_STRING("src"), src);
const PRUnichar *strings[] = { tagName.get(), src.get() };
nsXFormsUtils::ReportError(NS_LITERAL_STRING("externalLink2Error"),
strings, 2, mElement, mElement);
mStopType = eStopType_LinkError;
}
}
// If the type is Hint or Ephemeral we want to return ns_ok so that callbacks
// continue and we can read the contents of the src attribute during
// OnDataAvailable. For all others, we return ns_binding_aborted because we
// don't care to actually read the data at this point. The external content
// for these other elements will be retrieved by the services that actually
// display the popups.
if (IsEphemeral() && mStopType == eStopType_None)
return NS_OK;
AddRemoveExternalResource(PR_FALSE);
mChannel = nsnull;
return NS_BINDING_ABORTED;
}
NS_IMETHODIMP
nsXFormsMessageElement::OnDataAvailable(nsIRequest *aRequest,
nsISupports *aContext,
nsIInputStream *aInputStream,
PRUint32 aOffset,
PRUint32 aCount)
{
if (!mElement) {
AddRemoveExternalResource(PR_FALSE);
mChannel = nsnull;
return NS_BINDING_ABORTED;
}
if (!IsEphemeral())
return NS_BINDING_ABORTED;
nsresult rv;
PRUint32 size, bytesRead;
char buffer[256];
while (aCount) {
size = PR_MIN(aCount, sizeof(buffer));
rv = aInputStream->Read(buffer, size, &bytesRead);
NS_ENSURE_SUCCESS(rv, rv);
mSrcAttrText.Append(buffer, bytesRead);
aCount -= bytesRead;
}
return NS_OK;
}
NS_IMETHODIMP
nsXFormsMessageElement::OnStopRequest(nsIRequest *aRequest,
nsISupports *aContext,
nsresult aStatusCode)
{
if (IsEphemeral()) {
nsCOMPtr<nsIXFormsUIWidget> widget = do_QueryInterface(mElement);
if (widget)
widget->Refresh();
AddRemoveExternalResource(PR_FALSE);
mChannel = nsnull;
}
return NS_OK;
}
void
nsXFormsMessageElement::AddRemoveExternalResource(PRBool aAdd)
{
// if this message doesn't have a channel established already or it has
// already returned, then no sense bumping the counter.
if (!mChannel) {
return;
}
nsCOMPtr<nsIDOMDocument> domDoc;
mElement->GetOwnerDocument(getter_AddRefs(domDoc));
if (!domDoc) {
return;
}
nsCOMPtr<nsIDocument> doc = do_QueryInterface(domDoc);
PRUint32 loadingMessages = NS_PTR_TO_UINT32(
doc->GetProperty(nsXFormsAtoms::externalMessagesProperty));
if (aAdd) {
loadingMessages++;
} else {
if (loadingMessages) {
loadingMessages--;
}
}
doc->SetProperty(nsXFormsAtoms::externalMessagesProperty,
NS_REINTERPRET_CAST(void *, loadingMessages), nsnull);
if (!loadingMessages) {
// no outstanding loads left, let the model in the document know in case
// the models are waiting to send out the xforms-ready event
nsCOMPtr<nsIModelElementPrivate> modelPriv =
nsXFormsUtils::GetModel(mElement);
if (modelPriv) {
// if there are no more messages loading then it is probably the case
// that my mChannel is going to get nulled out as soon as this function
// returns. If the model is waiting for this notification, then it may
// kick off the message right away and we should probably ensure that
// mChannel is gone before HandleAction is called. So...if the channel
// isn't pending, let's null it out right here.
PRBool isPending = PR_TRUE;
mChannel->IsPending(&isPending);
if (!isPending) {
mChannel = nsnull;
}
modelPriv->MessageLoadFinished();
}
}
}
PRBool nsXFormsMessageElement::IsEphemeral()
{
if (mType == eType_Hint)
return PR_TRUE;
nsAutoString level;
mElement->GetAttribute(NS_LITERAL_STRING("level"), level);
return level.Equals(NS_LITERAL_STRING("ephemeral"));
}
NS_HIDDEN_(nsresult)
NS_NewXFormsMessageElement(nsIXTFElement **aResult)
{
*aResult = new nsXFormsMessageElement(nsXFormsMessageElement::eType_Normal);
if (!*aResult)
return NS_ERROR_OUT_OF_MEMORY;
NS_ADDREF(*aResult);
return NS_OK;
}
NS_HIDDEN_(nsresult)
NS_NewXFormsHintElement(nsIXTFElement **aResult)
{
*aResult = new nsXFormsMessageElement(nsXFormsMessageElement::eType_Hint);
if (!*aResult)
return NS_ERROR_OUT_OF_MEMORY;
NS_ADDREF(*aResult);
return NS_OK;
}
NS_HIDDEN_(nsresult)
NS_NewXFormsHelpElement(nsIXTFElement **aResult)
{
*aResult = new nsXFormsMessageElement(nsXFormsMessageElement::eType_Help);
if (!*aResult)
return NS_ERROR_OUT_OF_MEMORY;
NS_ADDREF(*aResult);
return NS_OK;
}
NS_HIDDEN_(nsresult)
NS_NewXFormsAlertElement(nsIXTFElement **aResult)
{
*aResult = new nsXFormsMessageElement(nsXFormsMessageElement::eType_Alert);
if (!*aResult)
return NS_ERROR_OUT_OF_MEMORY;
NS_ADDREF(*aResult);
return NS_OK;
}
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