| /* |
| * 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 "third_party/blink/renderer/core/html/forms/radio_input_type.h" |
| |
| #include "third_party/blink/renderer/core/dom/document.h" |
| #include "third_party/blink/renderer/core/dom/element_traversal.h" |
| #include "third_party/blink/renderer/core/events/keyboard_event.h" |
| #include "third_party/blink/renderer/core/events/mouse_event.h" |
| #include "third_party/blink/renderer/core/html/forms/html_form_element.h" |
| #include "third_party/blink/renderer/core/html/forms/html_input_element.h" |
| #include "third_party/blink/renderer/core/html_names.h" |
| #include "third_party/blink/renderer/core/input_type_names.h" |
| #include "third_party/blink/renderer/core/page/spatial_navigation.h" |
| #include "third_party/blink/renderer/platform/text/platform_locale.h" |
| |
| namespace blink { |
| |
| namespace { |
| |
| HTMLInputElement* NextInputElement(const HTMLInputElement& element, |
| const HTMLFormElement* stay_within, |
| bool forward) { |
| return forward ? Traversal<HTMLInputElement>::Next(element, stay_within) |
| : Traversal<HTMLInputElement>::Previous(element, stay_within); |
| } |
| |
| } // namespace |
| |
| using namespace HTMLNames; |
| |
| InputType* RadioInputType::Create(HTMLInputElement& element) { |
| return new RadioInputType(element); |
| } |
| |
| const AtomicString& RadioInputType::FormControlType() const { |
| return InputTypeNames::radio; |
| } |
| |
| bool RadioInputType::ValueMissing(const String&) const { |
| return GetElement().IsInRequiredRadioButtonGroup() && |
| !GetElement().CheckedRadioButtonForGroup(); |
| } |
| |
| String RadioInputType::ValueMissingText() const { |
| return GetLocale().QueryString( |
| WebLocalizedString::kValidationValueMissingForRadio); |
| } |
| |
| void RadioInputType::HandleClickEvent(MouseEvent* event) { |
| event->SetDefaultHandled(); |
| } |
| |
| HTMLInputElement* RadioInputType::FindNextFocusableRadioButtonInGroup( |
| HTMLInputElement* current_element, |
| bool forward) { |
| for (HTMLInputElement* input_element = |
| NextRadioButtonInGroup(current_element, forward); |
| input_element; |
| input_element = NextRadioButtonInGroup(input_element, forward)) { |
| if (input_element->IsFocusable()) |
| return input_element; |
| } |
| return nullptr; |
| } |
| |
| void RadioInputType::HandleKeydownEvent(KeyboardEvent* event) { |
| // TODO(tkent): We should return more earlier. |
| if (!GetElement().GetLayoutObject()) |
| return; |
| BaseCheckableInputType::HandleKeydownEvent(event); |
| if (event->DefaultHandled()) |
| return; |
| const String& key = event->key(); |
| if (key != "ArrowUp" && key != "ArrowDown" && key != "ArrowLeft" && |
| key != "ArrowRight") |
| return; |
| |
| if (event->ctrlKey() || event->metaKey() || event->altKey()) |
| 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 = GetElement().GetDocument(); |
| if (IsSpatialNavigationEnabled(document.GetFrame())) |
| return; |
| bool forward = ComputedTextDirection() == TextDirection::kRtl |
| ? (key == "ArrowDown" || key == "ArrowLeft") |
| : (key == "ArrowDown" || key == "ArrowRight"); |
| |
| // Force layout for isFocusable() in findNextFocusableRadioButtonInGroup(). |
| document.UpdateStyleAndLayoutIgnorePendingStylesheets(); |
| |
| // We can only stay within the form's children if the form hasn't been demoted |
| // to a leaf because of malformed HTML. |
| HTMLInputElement* input_element = |
| FindNextFocusableRadioButtonInGroup(&GetElement(), forward); |
| if (!input_element) { |
| // Traverse in reverse direction till last or first radio button |
| forward = !(forward); |
| HTMLInputElement* next_input_element = |
| FindNextFocusableRadioButtonInGroup(&GetElement(), forward); |
| while (next_input_element) { |
| input_element = next_input_element; |
| next_input_element = |
| FindNextFocusableRadioButtonInGroup(next_input_element, forward); |
| } |
| } |
| if (input_element) { |
| document.SetFocusedElement(input_element, |
| FocusParams(SelectionBehaviorOnFocus::kRestore, |
| kWebFocusTypeNone, nullptr)); |
| input_element->DispatchSimulatedClick(event, kSendNoEvents); |
| event->SetDefaultHandled(); |
| return; |
| } |
| } |
| |
| void RadioInputType::HandleKeyupEvent(KeyboardEvent* event) { |
| const String& key = event->key(); |
| if (key != " ") |
| 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 (GetElement().checked()) |
| return; |
| DispatchSimulatedClickIfActive(event); |
| } |
| |
| bool RadioInputType::IsKeyboardFocusable() const { |
| if (!InputType::IsKeyboardFocusable()) |
| return false; |
| |
| // When using Spatial Navigation, every radio button should be focusable. |
| if (IsSpatialNavigationEnabled(GetElement().GetDocument().GetFrame())) |
| return true; |
| |
| // Never allow keyboard tabbing to leave you in the same radio group. Always |
| // skip any other elements in the group. |
| Element* current_focused_element = |
| GetElement().GetDocument().FocusedElement(); |
| if (auto* focused_input = ToHTMLInputElementOrNull(current_focused_element)) { |
| if (focused_input->type() == InputTypeNames::radio && |
| focused_input->Form() == GetElement().Form() && |
| focused_input->GetName() == GetElement().GetName()) |
| return false; |
| } |
| |
| // Allow keyboard focus if we're checked or if nothing in the group is |
| // checked. |
| return GetElement().checked() || !GetElement().CheckedRadioButtonForGroup(); |
| } |
| |
| 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 GetElement().checked(); |
| } |
| |
| 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. |
| |
| ClickHandlingState* state = new ClickHandlingState; |
| |
| state->checked = GetElement().checked(); |
| state->checked_radio_button = GetElement().CheckedRadioButtonForGroup(); |
| GetElement().setChecked(true, kDispatchChangeEvent); |
| is_in_click_handler_ = true; |
| return state; |
| } |
| |
| 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* checked_radio_button = state.checked_radio_button.Get(); |
| if (!checked_radio_button) |
| GetElement().setChecked(false); |
| else if (checked_radio_button->type() == InputTypeNames::radio && |
| checked_radio_button->Form() == GetElement().Form() && |
| checked_radio_button->GetName() == GetElement().GetName()) |
| checked_radio_button->setChecked(true); |
| } else if (state.checked != GetElement().checked()) { |
| GetElement().DispatchInputAndChangeEventIfNeeded(); |
| } |
| is_in_click_handler_ = false; |
| // The work we did in willDispatchClick was default handling. |
| event->SetDefaultHandled(); |
| } |
| |
| bool RadioInputType::ShouldAppearIndeterminate() const { |
| return !GetElement().CheckedRadioButtonForGroup(); |
| } |
| |
| HTMLInputElement* RadioInputType::NextRadioButtonInGroup( |
| HTMLInputElement* current, |
| bool forward) { |
| // TODO(tkent): Staying within form() is incorrect. This code ignore input |
| // elements associated by |form| content attribute. |
| // TODO(tkent): Comparing name() with == is incorrect. It should be |
| // case-insensitive. |
| for (HTMLInputElement* input_element = |
| NextInputElement(*current, current->Form(), forward); |
| input_element; input_element = NextInputElement( |
| *input_element, current->Form(), forward)) { |
| if (current->Form() == input_element->Form() && |
| input_element->type() == InputTypeNames::radio && |
| input_element->GetName() == current->GetName()) |
| return input_element; |
| } |
| return nullptr; |
| } |
| |
| } // namespace blink |