290 lines
8.4 KiB
C++
290 lines
8.4 KiB
C++
/*
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* Copyright (C) 2007-2018 Apple Inc. All rights reserved.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public License
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* along with this library; see the file COPYING.LIB. If not, write to
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* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
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* Boston, MA 02110-1301, USA.
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*
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*/
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#include "config.h"
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#include "RadioButtonGroups.h"
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#include "HTMLInputElement.h"
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#include "Range.h"
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#include <wtf/WeakHashSet.h>
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#include <wtf/WeakPtr.h>
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namespace WebCore {
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class RadioButtonGroup {
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WTF_MAKE_FAST_ALLOCATED;
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public:
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bool isEmpty() const { return m_members.computesEmpty(); }
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bool isRequired() const { return m_requiredCount; }
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RefPtr<HTMLInputElement> checkedButton() const { return m_checkedButton.get(); }
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void add(HTMLInputElement&);
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void updateCheckedState(HTMLInputElement&);
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void requiredStateChanged(HTMLInputElement&);
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void remove(HTMLInputElement&);
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bool contains(HTMLInputElement&) const;
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Vector<Ref<HTMLInputElement>> members() const;
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private:
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void setNeedsStyleRecalcForAllButtons();
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void updateValidityForAllButtons();
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bool isValid() const;
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void setCheckedButton(HTMLInputElement*);
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WeakHashSet<HTMLInputElement> m_members;
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WeakPtr<HTMLInputElement> m_checkedButton;
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size_t m_requiredCount { 0 };
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};
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inline bool RadioButtonGroup::isValid() const
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{
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return !isRequired() || m_checkedButton;
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}
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Vector<Ref<HTMLInputElement>> RadioButtonGroup::members() const
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{
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Vector<Ref<HTMLInputElement>> sortedMembers;
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for (auto& member : m_members)
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sortedMembers.append(member);
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std::sort(sortedMembers.begin(), sortedMembers.end(), [](auto& a, auto& b) {
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return is_lt(treeOrder<ComposedTree>(a, b));
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});
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return sortedMembers;
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}
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void RadioButtonGroup::setCheckedButton(HTMLInputElement* button)
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{
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RefPtr<HTMLInputElement> oldCheckedButton = m_checkedButton.get();
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if (oldCheckedButton == button)
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return;
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bool hadCheckedButton = m_checkedButton.get();
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bool willHaveCheckedButton = button;
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if (hadCheckedButton != willHaveCheckedButton)
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setNeedsStyleRecalcForAllButtons();
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m_checkedButton = makeWeakPtr(button);
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if (oldCheckedButton)
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oldCheckedButton->setChecked(false);
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}
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void RadioButtonGroup::add(HTMLInputElement& button)
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{
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ASSERT(button.isRadioButton());
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if (!m_members.add(&button).isNewEntry)
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return;
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bool groupWasValid = isValid();
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if (button.isRequired())
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++m_requiredCount;
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if (button.checked())
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setCheckedButton(&button);
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bool groupIsValid = isValid();
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if (groupWasValid != groupIsValid)
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updateValidityForAllButtons();
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else if (!groupIsValid) {
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// A radio button not in a group is always valid. We need to make it
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// invalid only if the group is invalid.
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button.updateValidity();
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}
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}
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void RadioButtonGroup::updateCheckedState(HTMLInputElement& button)
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{
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ASSERT(button.isRadioButton());
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ASSERT(m_members.contains(button));
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bool wasValid = isValid();
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if (button.checked())
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setCheckedButton(&button);
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else {
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if (m_checkedButton == &button)
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setCheckedButton(nullptr);
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}
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if (wasValid != isValid())
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updateValidityForAllButtons();
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}
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void RadioButtonGroup::requiredStateChanged(HTMLInputElement& button)
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{
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ASSERT(button.isRadioButton());
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ASSERT(m_members.contains(button));
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bool wasValid = isValid();
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if (button.isRequired())
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++m_requiredCount;
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else {
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ASSERT(m_requiredCount);
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--m_requiredCount;
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}
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if (wasValid != isValid())
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updateValidityForAllButtons();
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}
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void RadioButtonGroup::remove(HTMLInputElement& button)
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{
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ASSERT(button.isRadioButton());
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if (!m_members.contains(button))
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return;
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bool wasValid = isValid();
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m_members.remove(button);
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if (button.isRequired()) {
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ASSERT(m_requiredCount);
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--m_requiredCount;
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}
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if (m_checkedButton) {
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button.invalidateStyleForSubtree();
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if (m_checkedButton == &button) {
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m_checkedButton = nullptr;
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setNeedsStyleRecalcForAllButtons();
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}
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}
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if (m_members.computesEmpty()) {
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ASSERT(!m_requiredCount);
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ASSERT(!m_checkedButton);
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} else if (wasValid != isValid())
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updateValidityForAllButtons();
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if (!wasValid) {
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// A radio button not in a group is always valid. We need to make it
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// valid only if the group was invalid.
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button.updateValidity();
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}
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}
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void RadioButtonGroup::setNeedsStyleRecalcForAllButtons()
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{
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for (auto& button : m_members) {
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ASSERT(button.isRadioButton());
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button.invalidateStyleForSubtree();
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}
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}
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void RadioButtonGroup::updateValidityForAllButtons()
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{
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for (auto& button : m_members) {
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ASSERT(button.isRadioButton());
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button.updateValidity();
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}
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}
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bool RadioButtonGroup::contains(HTMLInputElement& button) const
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{
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return m_members.contains(button);
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}
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// ----------------------------------------------------------------
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// Explicitly define default constructor and destructor here outside the header
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// so we can compile the header without including the definition of RadioButtonGroup.
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RadioButtonGroups::RadioButtonGroups() = default;
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RadioButtonGroups::~RadioButtonGroups() = default;
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void RadioButtonGroups::addButton(HTMLInputElement& element)
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{
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ASSERT(element.isRadioButton());
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if (element.name().isEmpty())
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return;
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auto& group = m_nameToGroupMap.add(element.name().impl(), nullptr).iterator->value;
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if (!group)
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group = makeUnique<RadioButtonGroup>();
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group->add(element);
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}
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Vector<Ref<HTMLInputElement>> RadioButtonGroups::groupMembers(const HTMLInputElement& element) const
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{
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ASSERT(element.isRadioButton());
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if (!element.isRadioButton())
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return { };
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auto* name = element.name().impl();
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if (!name)
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return { };
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auto* group = m_nameToGroupMap.get(name);
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if (!group)
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return { };
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return group->members();
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}
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void RadioButtonGroups::updateCheckedState(HTMLInputElement& element)
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{
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ASSERT(element.isRadioButton());
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if (element.name().isEmpty())
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return;
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if (auto* group = m_nameToGroupMap.get(element.name().impl()))
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group->updateCheckedState(element);
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}
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void RadioButtonGroups::requiredStateChanged(HTMLInputElement& element)
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{
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ASSERT(element.isRadioButton());
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if (element.name().isEmpty())
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return;
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auto* group = m_nameToGroupMap.get(element.name().impl());
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if (!group)
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return;
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group->requiredStateChanged(element);
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}
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RefPtr<HTMLInputElement> RadioButtonGroups::checkedButtonForGroup(const AtomString& name) const
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{
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m_nameToGroupMap.checkConsistency();
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RadioButtonGroup* group = m_nameToGroupMap.get(name.impl());
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return group ? group->checkedButton() : nullptr;
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}
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bool RadioButtonGroups::hasCheckedButton(const HTMLInputElement& element) const
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{
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ASSERT(element.isRadioButton());
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const AtomString& name = element.name();
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if (name.isEmpty())
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return element.checked();
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auto* group = m_nameToGroupMap.get(name.impl());
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if (!group)
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return false; // FIXME: Update the radio button group before author script had a chance to run in didFinishInsertingNode().
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return group->checkedButton();
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}
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bool RadioButtonGroups::isInRequiredGroup(HTMLInputElement& element) const
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{
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ASSERT(element.isRadioButton());
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if (element.name().isEmpty())
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return false;
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auto* group = m_nameToGroupMap.get(element.name().impl());
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return group && group->isRequired() && group->contains(element);
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}
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void RadioButtonGroups::removeButton(HTMLInputElement& element)
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{
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ASSERT(element.isRadioButton());
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if (element.name().isEmpty())
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return;
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m_nameToGroupMap.checkConsistency();
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auto it = m_nameToGroupMap.find(element.name().impl());
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if (it == m_nameToGroupMap.end())
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return;
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it->value->remove(element);
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if (it->value->isEmpty())
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m_nameToGroupMap.remove(it);
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}
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} // namespace
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