gecko-dev/extensions/xforms/nsXFormsUploadElement.cpp

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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
* IBM Corporation.
* Portions created by the Initial Developer are Copyright (C) 2004
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
* Darin Fisher <darin@meer.net>
*
* 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 "nsIDOMEventTarget.h"
#include "nsIDOM3Node.h"
#include "nsIDOMElement.h"
#include "nsMemory.h"
#include "nsCOMPtr.h"
#include "nsString.h"
#include "nsIXTFXMLVisualWrapper.h"
#include "nsIDOMDocument.h"
#include "nsXFormsControlStub.h"
#include "nsISchema.h"
#include "nsIDOMHTMLInputElement.h"
#include "nsXFormsAtoms.h"
#include "nsAutoPtr.h"
#include "nsIDOMXPathResult.h"
#include "nsIDOMFocusListener.h"
#include "nsXFormsUtils.h"
#include "nsIModelElementPrivate.h"
#include "nsIContent.h"
#include "nsIDOMXPathExpression.h"
#include "nsNetUtil.h"
static void
ReleaseObject(void *aObject,
nsIAtom *aPropertyName,
void *aPropertyValue,
void *aData)
{
NS_STATIC_CAST(nsISupports *, aPropertyValue)->Release();
}
/**
* Implementation of the \<upload\> element.
*/
class nsXFormsUploadElement : public nsIDOMFocusListener,
public nsXFormsControlStub
{
public:
NS_DECL_ISUPPORTS_INHERITED
// nsIXTFXMLVisual overrides
NS_IMETHOD OnCreated(nsIXTFXMLVisualWrapper *aWrapper);
// nsIXTFVisual overrides
NS_IMETHOD GetVisualContent(nsIDOMElement **aElement);
NS_IMETHOD GetInsertionPoint(nsIDOMElement **aPoint);
// nsIXTFElement overrides
NS_IMETHOD OnDestroyed();
NS_IMETHOD AttributeSet(nsIAtom *aName, const nsAString &aValue);
NS_IMETHOD AttributeRemoved(nsIAtom *aName);
// nsIXFormsControl
NS_IMETHOD Refresh();
NS_IMETHOD TryFocus(PRBool* aOK);
// nsIDOMEventListener
NS_IMETHOD HandleEvent(nsIDOMEvent *aEvent);
// nsIDOMFocusListener
NS_IMETHOD Focus(nsIDOMEvent *aEvent);
NS_IMETHOD Blur(nsIDOMEvent *aEvent);
private:
nsCOMPtr<nsIDOMElement> mLabel;
nsCOMPtr<nsIDOMHTMLInputElement> mInput;
};
NS_IMPL_ISUPPORTS_INHERITED2(nsXFormsUploadElement,
nsXFormsControlStub,
nsIDOMFocusListener,
nsIDOMEventListener)
// nsIXTFXMLVisual
NS_IMETHODIMP
nsXFormsUploadElement::OnCreated(nsIXTFXMLVisualWrapper *aWrapper)
{
nsresult rv = nsXFormsControlStub::OnCreated(aWrapper);
NS_ENSURE_SUCCESS(rv, rv);
// Our anonymous content structure will look like this:
//
// <label> (mLabel)
// <span/> (insertion point)
// <input/> (mInput)
// </label>
nsCOMPtr<nsIDOMDocument> domDoc;
mElement->GetOwnerDocument(getter_AddRefs(domDoc));
domDoc->CreateElementNS(NS_LITERAL_STRING(NS_NAMESPACE_XHTML),
NS_LITERAL_STRING("label"),
getter_AddRefs(mLabel));
NS_ENSURE_STATE(mLabel);
nsCOMPtr<nsIDOMElement> element;
nsCOMPtr<nsIDOMNode> childReturn;
domDoc->CreateElementNS(NS_LITERAL_STRING(NS_NAMESPACE_XHTML),
NS_LITERAL_STRING("span"),
getter_AddRefs(element));
NS_ENSURE_STATE(element);
mLabel->AppendChild(element, getter_AddRefs(childReturn));
domDoc->CreateElementNS(NS_LITERAL_STRING(NS_NAMESPACE_XHTML),
NS_LITERAL_STRING("input"),
getter_AddRefs(element));
mInput = do_QueryInterface(element);
NS_ENSURE_STATE(mInput);
mInput->SetType(NS_LITERAL_STRING("file"));
mLabel->AppendChild(mInput, getter_AddRefs(childReturn));
// We can't use xtf handleDefault here because editor stops blur events from
// bubbling, and we can't use a system event group handler because blur
// events don't go to the system event group (bug 263240). So, just install
// a bubbling listener in the normal event group. This works out because
// content can't get at the anonymous content to install an event handler,
// and the event doesn't bubble up.
nsCOMPtr<nsIDOMEventTarget> targ = do_QueryInterface(mInput);
NS_ASSERTION(targ, "input must be an event target!");
targ->AddEventListener(NS_LITERAL_STRING("blur"), this, PR_FALSE);
return NS_OK;
}
NS_IMETHODIMP
nsXFormsUploadElement::AttributeSet(nsIAtom *aName, const nsAString &aValue)
{
if (aName == nsXFormsAtoms::accesskey) {
// accesskey
mInput->SetAttribute(NS_LITERAL_STRING("accesskey"), aValue);
}
return NS_OK;
}
NS_IMETHODIMP
nsXFormsUploadElement::AttributeRemoved(nsIAtom *aName)
{
if (aName == nsXFormsAtoms::accesskey) {
// accesskey
mInput->RemoveAttribute(NS_LITERAL_STRING("accesskey"));
}
return NS_OK;
}
// nsIXTFVisual
NS_IMETHODIMP
nsXFormsUploadElement::GetVisualContent(nsIDOMElement **aElement)
{
NS_ADDREF(*aElement = mLabel);
return NS_OK;
}
NS_IMETHODIMP
nsXFormsUploadElement::GetInsertionPoint(nsIDOMElement **aPoint)
{
nsCOMPtr<nsIDOMNode> childNode;
mLabel->GetFirstChild(getter_AddRefs(childNode));
return CallQueryInterface(childNode, aPoint);
}
// nsIXTFElement
NS_IMETHODIMP
nsXFormsUploadElement::OnDestroyed()
{
nsCOMPtr<nsIDOMEventTarget> targ = do_QueryInterface(mInput);
if (NS_LIKELY(targ != nsnull)) {
targ->RemoveEventListener(NS_LITERAL_STRING("blur"), this, PR_FALSE);
}
return nsXFormsControlStub::OnDestroyed();
}
// nsIDOMEventListener
NS_IMETHODIMP
nsXFormsUploadElement::HandleEvent(nsIDOMEvent *aEvent)
{
return NS_OK;
}
NS_IMETHODIMP
nsXFormsUploadElement::Focus(nsIDOMEvent *aEvent)
{
return NS_OK;
}
NS_IMETHODIMP
nsXFormsUploadElement::Blur(nsIDOMEvent *aEvent)
{
if (!mInput || !mBoundNode || !mModel ||
!nsXFormsUtils::EventHandlingAllowed(aEvent, mElement))
return NS_OK;
nsAutoString value;
mInput->GetValue(value);
// store the file as a property on the selected content node. the submission
// code will read this value.
nsCOMPtr<nsIContent> content = do_QueryInterface(mBoundNode);
NS_ENSURE_STATE(content);
nsILocalFile *file = nsnull;
nsCAutoString spec;
// We need to special case an empty value. If the input field is blank,
// then I assume that the intention is that all bound nodes will become
// (or stay) empty and that there shouldn't be any file kept in the property.
if (!value.IsEmpty()) {
NS_NewLocalFile(value, PR_FALSE, &file);
NS_ENSURE_STATE(file);
NS_GetURLSpecFromFile(file, spec);
content->SetProperty(nsXFormsAtoms::uploadFileProperty, file,
ReleaseObject);
} else {
content->DeleteProperty(nsXFormsAtoms::uploadFileProperty);
}
// update the instance data node. this value is never used by the submission
// code. instead, it exists so that the instance data will appear to be in-
// sync with what is actually submitted.
PRBool changed;
nsresult rv = mModel->SetNodeValue(mBoundNode, NS_ConvertUTF8toUTF16(spec),
&changed);
NS_ENSURE_SUCCESS(rv, rv);
if (changed) {
nsCOMPtr<nsIDOMNode> model = do_QueryInterface(mModel);
if (model) {
rv = nsXFormsUtils::DispatchEvent(model, eEvent_Recalculate);
NS_ENSURE_SUCCESS(rv, rv);
rv = nsXFormsUtils::DispatchEvent(model, eEvent_Revalidate);
NS_ENSURE_SUCCESS(rv, rv);
rv = nsXFormsUtils::DispatchEvent(model, eEvent_Refresh);
NS_ENSURE_SUCCESS(rv, rv);
}
}
return NS_OK;
}
// nsIXFormsControl
NS_IMETHODIMP
nsXFormsUploadElement::Refresh()
{
if (!mInput || !mBoundNode)
return NS_OK;
nsCOMPtr<nsIContent> content = do_QueryInterface(mBoundNode);
NS_ENSURE_STATE(content);
nsILocalFile *file =
NS_STATIC_CAST(nsILocalFile *,
content->GetProperty(nsXFormsAtoms::uploadFileProperty));
// get the text value for the control
nsAutoString value;
if (file)
file->GetPath(value);
mInput->SetValue(value);
mInput->SetReadOnly(GetReadOnlyState());
return NS_OK;
}
NS_IMETHODIMP
nsXFormsUploadElement::TryFocus(PRBool* aOK)
{
*aOK = GetRelevantState() && nsXFormsUtils::FocusControl(mInput);
return NS_OK;
}
NS_HIDDEN_(nsresult)
NS_NewXFormsUploadElement(nsIXTFElement **aResult)
{
*aResult = new nsXFormsUploadElement();
if (!*aResult)
return NS_ERROR_OUT_OF_MEMORY;
NS_ADDREF(*aResult);
return NS_OK;
}