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/*
* Copyright (C) 2005, 2011 Apple Inc. All rights reserved.
* Copyright (C) 2010 Google Inc. All rights reserved.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public License
* along with this library; see the file COPYING.LIB. If not, write to
* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301, USA.
*
*/
#include "config.h"
#include "RadioInputType.h"
#include "Frame.h"
#include "HTMLInputElement.h"
#include "HTMLNames.h"
#include "KeyboardEvent.h"
#include "LocalizedStrings.h"
#include "MouseEvent.h"
#include "Settings.h"
#include "SpatialNavigation.h"
#include <wtf/PassOwnPtr.h>
namespace WebCore {
using namespace HTMLNames;
PassOwnPtr<InputType> RadioInputType::create(HTMLInputElement* element)
{
return adoptPtr(new RadioInputType(element));
}
const AtomicString& RadioInputType::formControlType() const
{
return InputTypeNames::radio();
}
bool RadioInputType::valueMissing(const String&) const
{
return !element()->checkedRadioButtons().checkedButtonForGroup(element()->name());
}
String RadioInputType::valueMissingText() const
{
return validationMessageValueMissingForRadioText();
}
void RadioInputType::handleClickEvent(MouseEvent* event)
{
event->setDefaultHandled();
}
void RadioInputType::handleKeydownEvent(KeyboardEvent* event)
{
BaseCheckableInputType::handleKeydownEvent(event);
if (event->defaultHandled())
return;
const String& key = event->keyIdentifier();
if (key != "Up" && key != "Down" && key != "Left" && key != "Right")
return;
// Left and up mean "previous radio button".
// Right and down mean "next radio button".
// Tested in WinIE, and even for RTL, left still means previous radio button (and so moves
// to the right). Seems strange, but we'll match it.
// However, when using Spatial Navigation, we need to be able to navigate without changing the selection.
Document* document = element()->document();
if (isSpatialNavigationEnabled(document->frame()))
return;
bool forward = (key == "Down" || key == "Right");
// We can only stay within the form's children if the form hasn't been demoted to a leaf because
// of malformed HTML.
Node* node = element();
while ((node = (forward ? node->traverseNextNode() : node->traversePreviousNode()))) {
// Once we encounter a form element, we know we're through.
if (node->hasTagName(formTag))
break;
// Look for more radio buttons.
if (!node->hasTagName(inputTag))
continue;
HTMLInputElement* inputElement = static_cast<HTMLInputElement*>(node);
if (inputElement->form() != element()->form())
break;
if (inputElement->isRadioButton() && inputElement->name() == element()->name() && inputElement->isFocusable()) {
inputElement->setChecked(true);
document->setFocusedNode(inputElement);
inputElement->dispatchSimulatedClick(event, false, false);
event->setDefaultHandled();
return;
}
}
}
void RadioInputType::handleKeyupEvent(KeyboardEvent* event)
{
const String& key = event->keyIdentifier();
if (key != "U+0020")
return;
// If an unselected radio is tabbed into (because the entire group has nothing
// checked, or because of some explicit .focus() call), then allow space to check it.
if (element()->checked())
return;
dispatchSimulatedClickIfActive(event);
}
bool RadioInputType::isKeyboardFocusable() const
{
// When using Spatial Navigation, every radio button should be focusable.
if (isSpatialNavigationEnabled(element()->document()->frame()))
return true;
// Never allow keyboard tabbing to leave you in the same radio group. Always
// skip any other elements in the group.
Node* currentFocusedNode = element()->document()->focusedNode();
if (currentFocusedNode && currentFocusedNode->hasTagName(inputTag)) {
HTMLInputElement* focusedInput = static_cast<HTMLInputElement*>(currentFocusedNode);
if (focusedInput->isRadioButton() && focusedInput->form() == element()->form() && focusedInput->name() == element()->name())
return false;
}
// Allow keyboard focus if we're checked or if nothing in the group is checked.
return element()->checked() || !element()->checkedRadioButtons().checkedButtonForGroup(element()->name());
}
void RadioInputType::attach()
{
InputType::attach();
element()->updateCheckedRadioButtons();
}
bool RadioInputType::shouldSendChangeEventAfterCheckedChanged()
{
// Don't send a change event for a radio button that's getting unchecked.
// This was done to match the behavior of other browsers.
return element()->checked();
}
PassOwnPtr<ClickHandlingState> RadioInputType::willDispatchClick()
{
// An event handler can use preventDefault or "return false" to reverse the selection we do here.
// The ClickHandlingState object contains what we need to undo what we did here in didDispatchClick.
// We want radio groups to end up in sane states, i.e., to have something checked.
// Therefore if nothing is currently selected, we won't allow the upcoming action to be "undone", since
// we want some object in the radio group to actually get selected.
OwnPtr<ClickHandlingState> state = adoptPtr(new ClickHandlingState);
state->checked = element()->checked();
state->indeterminate = element()->indeterminate();
state->checkedRadioButton = element()->checkedRadioButtons().checkedButtonForGroup(element()->name());
if (element()->indeterminate())
element()->setIndeterminate(false);
element()->setChecked(true, true);
return state.release();
}
void RadioInputType::didDispatchClick(Event* event, const ClickHandlingState& state)
{
if (event->defaultPrevented() || event->defaultHandled()) {
// Restore the original selected radio button if possible.
// Make sure it is still a radio button and only do the restoration if it still belongs to our group.
HTMLInputElement* checkedRadioButton = state.checkedRadioButton.get();
if (checkedRadioButton
&& checkedRadioButton->isRadioButton()
&& checkedRadioButton->form() == element()->form()
&& checkedRadioButton->name() == element()->name()) {
checkedRadioButton->setChecked(true);
}
element()->setIndeterminate(state.indeterminate);
}
// The work we did in willDispatchClick was default handling.
event->setDefaultHandled();
}
bool RadioInputType::isRadioButton() const
{
return true;
}
} // namespace WebCore
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