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gecko-dev/extensions/xforms/nsXFormsInputElement.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):
* Brian Ryner <bryner@brianryner.com>
*
* 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 "nsIXFormsControl.h"
#include "nsXFormsControlStub.h"
#include "nsISchema.h"
#include "nsIDOMHTMLInputElement.h"
#include "nsIDOMHTMLTextAreaElement.h"
#include "nsAutoPtr.h"
#include "nsIDOMXPathResult.h"
#include "nsIDOMFocusListener.h"
#include "nsXFormsUtils.h"
#include "nsIModelElementPrivate.h"
#include "nsIContent.h"
#include "nsIDOMXPathExpression.h"
#include "nsXFormsAtoms.h"
/**
* Implementation of the \<input\>, \<secret\>, and \<textarea\> elements.
*/
class nsXFormsInputElement : 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);
NS_IMETHOD HandleDefault(nsIDOMEvent *aEvent, PRBool *aHandled);
// 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);
enum ControlType {
eType_Input,
eType_Secret,
eType_TextArea
};
// nsXFormsInputElement
nsXFormsInputElement(ControlType aType)
: mType(aType), mIncremental(PR_FALSE)
{}
private:
// Updates the instance data node bound to this form control.
nsresult UpdateInstanceData();
nsCOMPtr<nsIDOMElement> mLabel;
nsCOMPtr<nsIDOMElement> mControl;
ControlType mType;
PRBool mIncremental;
};
NS_IMPL_ISUPPORTS_INHERITED2(nsXFormsInputElement,
nsXFormsControlStub,
nsIDOMFocusListener,
nsIDOMEventListener)
// nsIXTFXMLVisual
NS_IMETHODIMP
nsXFormsInputElement::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/> or <textarea/> (mControl)
// </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),
mType == eType_TextArea
? NS_LITERAL_STRING("textarea")
: NS_LITERAL_STRING("input"),
getter_AddRefs(mControl));
NS_ENSURE_STATE(mControl);
if (mType == eType_Secret) {
nsCOMPtr<nsIDOMHTMLInputElement> input = do_QueryInterface(mControl);
NS_ENSURE_STATE(input);
input->SetType(NS_LITERAL_STRING("password"));
}
mLabel->AppendChild(mControl, 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(mControl);
NS_ASSERTION(targ, "input must be an event target!");
targ->AddEventListener(NS_LITERAL_STRING("blur"), this, PR_FALSE);
return NS_OK;
}
// nsIXTFVisual
NS_IMETHODIMP
nsXFormsInputElement::GetVisualContent(nsIDOMElement **aElement)
{
NS_ADDREF(*aElement = mLabel);
return NS_OK;
}
NS_IMETHODIMP
nsXFormsInputElement::GetInsertionPoint(nsIDOMElement **aPoint)
{
nsCOMPtr<nsIDOMNode> childNode;
mLabel->GetFirstChild(getter_AddRefs(childNode));
return CallQueryInterface(childNode, aPoint);
}
// nsIXTFElement
NS_IMETHODIMP
nsXFormsInputElement::OnDestroyed()
{
nsCOMPtr<nsIDOMEventTarget> targ = do_QueryInterface(mControl);
if (NS_LIKELY(targ != nsnull)) {
targ->RemoveEventListener(NS_LITERAL_STRING("blur"), this, PR_FALSE);
}
nsXFormsControlStub::OnDestroyed();
return NS_OK;
}
NS_IMETHODIMP
nsXFormsInputElement::AttributeSet(nsIAtom *aName, const nsAString &aValue)
{
nsXFormsControlStub::AttributeSet(aName, aValue);
if (aName == nsXFormsAtoms::incremental)
mIncremental = aValue.EqualsLiteral("true");
return NS_OK;
}
NS_IMETHODIMP
nsXFormsInputElement::AttributeRemoved(nsIAtom *aName)
{
nsXFormsControlStub::AttributeRemoved(aName);
if (aName == nsXFormsAtoms::incremental) {
/* if we remove the incremental attribute, then we need to go back to the
* default value. True if it is a checkbox, false otherwise.
*
* XXX - Once we get more input types, the default value for incremental
* should probably be abstracted out somewhere.
*/
nsCOMPtr<nsIDOMHTMLInputElement> input = do_QueryInterface(mControl);
NS_ENSURE_STATE(input);
nsAutoString type;
input->GetType(type);
if (mType == eType_Input && type.EqualsLiteral("checkbox")) {
mIncremental = PR_TRUE;
} else {
mIncremental = PR_FALSE;
}
}
return NS_OK;
}
NS_IMETHODIMP
nsXFormsInputElement::HandleDefault(nsIDOMEvent *aEvent,
PRBool *aHandled)
{
nsresult rv;
rv = nsXFormsControlStub::HandleDefault(aEvent, aHandled);
NS_ENSURE_SUCCESS(rv, rv);
if (*aHandled || !mIncremental) {
return NS_OK;
}
nsAutoString type;
aEvent->GetType(type);
// Seems like too big of a hassle for too little gain to also check if we are
// a checkbox in addition to checking for the click. Plus, other input types
// like a date picker for input controls bound to a xsi:date type might
// need click updates, too.
if (type.EqualsLiteral("keyup") || type.EqualsLiteral("click"))
UpdateInstanceData();
return NS_OK;
}
// nsIDOMEventListener
NS_IMETHODIMP
nsXFormsInputElement::HandleEvent(nsIDOMEvent *aEvent)
{
return NS_OK;
}
NS_IMETHODIMP
nsXFormsInputElement::Focus(nsIDOMEvent *aEvent)
{
return NS_OK;
}
NS_IMETHODIMP
nsXFormsInputElement::Blur(nsIDOMEvent *aEvent)
{
return UpdateInstanceData();
}
nsresult
nsXFormsInputElement::UpdateInstanceData()
{
if (!mControl || !mBoundNode || !mModel)
return NS_OK;
nsAutoString value;
if (mType == eType_TextArea) {
nsCOMPtr<nsIDOMHTMLTextAreaElement> textArea = do_QueryInterface(mControl);
NS_ENSURE_STATE(textArea);
textArea->GetValue(value);
} else {
nsCOMPtr<nsIDOMHTMLInputElement> input = do_QueryInterface(mControl);
NS_ENSURE_STATE(input);
nsAutoString type;
input->GetType(type);
if (mType == eType_Input && type.EqualsLiteral("checkbox")) {
PRBool checked;
input->GetChecked(&checked);
// XXX we've got a problem here. Since UpdateInstanceData can be called
// due to a blur event, as it stands now we could be changing the instance
// data values even if the user didn't click on the checkbox, but instead
// was just tabbing through the form.
if(checked) {
value.Append(NS_LITERAL_STRING("true"));
} else {
value.Append(NS_LITERAL_STRING("false"));
}
} else {
input->GetValue(value);
}
}
PRBool changed;
nsresult rv = mModel->SetNodeValue(mBoundNode, value, &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
nsXFormsInputElement::Refresh()
{
if (!mControl || !mModel || !mHasParent)
return NS_OK;
nsAutoString text;
PRBool readonly = GetReadOnlyState();
if (mBoundNode) {
nsXFormsUtils::GetNodeValue(mBoundNode, text);
}
if (mType == eType_TextArea) {
nsCOMPtr<nsIDOMHTMLTextAreaElement> textArea = do_QueryInterface(mControl);
NS_ENSURE_STATE(textArea);
textArea->SetValue(text);
textArea->SetReadOnly(readonly);
} else {
nsCOMPtr<nsIDOMHTMLInputElement> input = do_QueryInterface(mControl);
NS_ENSURE_STATE(input);
if (mType == eType_Input) {
nsCOMPtr<nsISchemaType> type;
mModel->GetTypeForControl(this, getter_AddRefs(type));
nsCOMPtr<nsISchemaBuiltinType> biType = do_QueryInterface(type);
PRUint16 typeValue = nsISchemaBuiltinType::BUILTIN_TYPE_STRING;
if (biType)
biType->GetBuiltinType(&typeValue);
if (typeValue == nsISchemaBuiltinType::BUILTIN_TYPE_BOOLEAN) {
input->SetAttribute(NS_LITERAL_STRING("type"),
NS_LITERAL_STRING("checkbox"));
input->SetChecked(text.EqualsLiteral("true") ||
text.EqualsLiteral("1"));
// other xforms processors default to incremental update in this case,
// so we should, too.
mIncremental = PR_TRUE;
} else {
input->RemoveAttribute(NS_LITERAL_STRING("type"));
input->SetValue(text);
}
} else {
input->SetValue(text);
}
input->SetReadOnly(readonly);
}
return NS_OK;
}
NS_IMETHODIMP
nsXFormsInputElement::TryFocus(PRBool* aOK)
{
*aOK = GetRelevantState() && nsXFormsUtils::FocusControl(mControl);
return NS_OK;
}
NS_HIDDEN_(nsresult)
NS_NewXFormsInputElement(nsIXTFElement **aResult)
{
*aResult = new nsXFormsInputElement(nsXFormsInputElement::eType_Input);
if (!*aResult)
return NS_ERROR_OUT_OF_MEMORY;
NS_ADDREF(*aResult);
return NS_OK;
}
NS_HIDDEN_(nsresult)
NS_NewXFormsSecretElement(nsIXTFElement **aResult)
{
*aResult = new nsXFormsInputElement(nsXFormsInputElement::eType_Secret);
if (!*aResult)
return NS_ERROR_OUT_OF_MEMORY;
NS_ADDREF(*aResult);
return NS_OK;
}
NS_HIDDEN_(nsresult)
NS_NewXFormsTextAreaElement(nsIXTFElement **aResult)
{
*aResult = new nsXFormsInputElement(nsXFormsInputElement::eType_TextArea);
if (!*aResult)
return NS_ERROR_OUT_OF_MEMORY;
NS_ADDREF(*aResult);
return NS_OK;
}
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