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Diffstat (limited to 'Source/WebCore/html/RadioInputType.cpp')
-rw-r--r-- | Source/WebCore/html/RadioInputType.cpp | 196 |
1 files changed, 196 insertions, 0 deletions
diff --git a/Source/WebCore/html/RadioInputType.cpp b/Source/WebCore/html/RadioInputType.cpp new file mode 100644 index 0000000..0c13161 --- /dev/null +++ b/Source/WebCore/html/RadioInputType.cpp @@ -0,0 +1,196 @@ +/* + * 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 |