blob: 3ea01c073cf7f13395e2e8231281fcebcbb7639a [file] [log] [blame]
/*
* Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
* Copyright (C) 1999 Lars Knoll (knoll@kde.org)
* (C) 1999 Antti Koivisto (koivisto@kde.org)
* (C) 2001 Dirk Mueller (mueller@kde.org)
* Copyright (C) 2004, 2005, 2006, 2007, 2009, 2010, 2011 Apple Inc. All rights reserved.
* (C) 2006 Alexey Proskuryakov (ap@nypop.com)
* Copyright (C) 2010 Google Inc. All rights reserved.
* Copyright (C) 2009 Torch Mobile Inc. All rights reserved. (http://www.torchmobile.com/)
*
* 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 "HTMLSelectElement.h"
#include "AXObjectCache.h"
#include "DOMFormData.h"
#include "ElementTraversal.h"
#include "EventHandler.h"
#include "EventNames.h"
#include "FormController.h"
#include "Frame.h"
#include "GenericCachedHTMLCollection.h"
#include "HTMLFormElement.h"
#include "HTMLHRElement.h"
#include "HTMLNames.h"
#include "HTMLOptGroupElement.h"
#include "HTMLOptionElement.h"
#include "HTMLOptionsCollection.h"
#include "HTMLParserIdioms.h"
#include "KeyboardEvent.h"
#include "LocalizedStrings.h"
#include "MouseEvent.h"
#include "NodeRareData.h"
#include "Page.h"
#include "PlatformMouseEvent.h"
#include "RenderListBox.h"
#include "RenderMenuList.h"
#include "RenderTheme.h"
#include "Settings.h"
#include "SpatialNavigation.h"
#include <wtf/IsoMallocInlines.h>
#include <wtf/text/StringConcatenateNumbers.h>
namespace WebCore {
WTF_MAKE_ISO_ALLOCATED_IMPL(HTMLSelectElement);
using namespace WTF::Unicode;
using namespace HTMLNames;
// Upper limit agreed upon with representatives of Opera and Mozilla.
static const unsigned maxSelectItems = 10000;
HTMLSelectElement::HTMLSelectElement(const QualifiedName& tagName, Document& document, HTMLFormElement* form)
: HTMLFormControlElementWithState(tagName, document, form)
, m_typeAhead(this)
, m_size(0)
, m_lastOnChangeIndex(-1)
, m_activeSelectionAnchorIndex(-1)
, m_activeSelectionEndIndex(-1)
, m_isProcessingUserDrivenChange(false)
, m_multiple(false)
, m_activeSelectionState(false)
, m_allowsNonContiguousSelection(false)
, m_shouldRecalcListItems(false)
{
ASSERT(hasTagName(selectTag));
}
Ref<HTMLSelectElement> HTMLSelectElement::create(const QualifiedName& tagName, Document& document, HTMLFormElement* form)
{
ASSERT(tagName.matches(selectTag));
return adoptRef(*new HTMLSelectElement(tagName, document, form));
}
void HTMLSelectElement::didRecalcStyle(Style::Change styleChange)
{
// Even though the options didn't necessarily change, we will call setOptionsChangedOnRenderer for its side effect
// of recomputing the width of the element. We need to do that if the style change included a change in zoom level.
setOptionsChangedOnRenderer();
HTMLFormControlElement::didRecalcStyle(styleChange);
}
const AtomicString& HTMLSelectElement::formControlType() const
{
static NeverDestroyed<const AtomicString> selectMultiple("select-multiple", AtomicString::ConstructFromLiteral);
static NeverDestroyed<const AtomicString> selectOne("select-one", AtomicString::ConstructFromLiteral);
return m_multiple ? selectMultiple : selectOne;
}
void HTMLSelectElement::deselectItems(HTMLOptionElement* excludeElement)
{
deselectItemsWithoutValidation(excludeElement);
updateValidity();
}
void HTMLSelectElement::optionSelectedByUser(int optionIndex, bool fireOnChangeNow, bool allowMultipleSelection)
{
// User interaction such as mousedown events can cause list box select elements to send change events.
// This produces that same behavior for changes triggered by other code running on behalf of the user.
if (!usesMenuList()) {
updateSelectedState(optionToListIndex(optionIndex), allowMultipleSelection, false);
updateValidity();
if (auto* renderer = this->renderer())
renderer->updateFromElement();
if (fireOnChangeNow)
listBoxOnChange();
return;
}
// Bail out if this index is already the selected one, to avoid running unnecessary JavaScript that can mess up
// autofill when there is no actual change (see https://bugs.webkit.org/show_bug.cgi?id=35256 and <rdar://7467917>).
// The selectOption function does not behave this way, possibly because other callers need a change event even
// in cases where the selected option is not change.
if (optionIndex == selectedIndex())
return;
selectOption(optionIndex, DeselectOtherOptions | (fireOnChangeNow ? DispatchChangeEvent : 0) | UserDriven);
}
bool HTMLSelectElement::hasPlaceholderLabelOption() const
{
// The select element has no placeholder label option if it has an attribute "multiple" specified or a display size of non-1.
//
// The condition "size() > 1" is not compliant with the HTML5 spec as of Dec 3, 2010. "size() != 1" is correct.
// Using "size() > 1" here because size() may be 0 in WebKit.
// See the discussion at https://bugs.webkit.org/show_bug.cgi?id=43887
//
// "0 size()" happens when an attribute "size" is absent or an invalid size attribute is specified.
// In this case, the display size should be assumed as the default.
// The default display size is 1 for non-multiple select elements, and 4 for multiple select elements.
//
// Finally, if size() == 0 and non-multiple, the display size can be assumed as 1.
if (multiple() || size() > 1)
return false;
int listIndex = optionToListIndex(0);
ASSERT(listIndex >= 0);
if (listIndex < 0)
return false;
HTMLOptionElement& option = downcast<HTMLOptionElement>(*listItems()[listIndex]);
return !listIndex && option.value().isEmpty();
}
String HTMLSelectElement::validationMessage() const
{
if (!willValidate())
return String();
if (customError())
return customValidationMessage();
return valueMissing() ? validationMessageValueMissingForSelectText() : String();
}
bool HTMLSelectElement::valueMissing() const
{
if (!willValidate())
return false;
if (!isRequired())
return false;
int firstSelectionIndex = selectedIndex();
// If a non-placeholer label option is selected (firstSelectionIndex > 0), it's not value-missing.
return firstSelectionIndex < 0 || (!firstSelectionIndex && hasPlaceholderLabelOption());
}
void HTMLSelectElement::listBoxSelectItem(int listIndex, bool allowMultiplySelections, bool shift, bool fireOnChangeNow)
{
if (!multiple())
optionSelectedByUser(listToOptionIndex(listIndex), fireOnChangeNow, false);
else {
updateSelectedState(listIndex, allowMultiplySelections, shift);
updateValidity();
if (fireOnChangeNow)
listBoxOnChange();
}
}
bool HTMLSelectElement::usesMenuList() const
{
#if !PLATFORM(IOS_FAMILY)
if (RenderTheme::singleton().delegatesMenuListRendering())
return true;
return !m_multiple && m_size <= 1;
#else
return !m_multiple;
#endif
}
int HTMLSelectElement::activeSelectionStartListIndex() const
{
if (m_activeSelectionAnchorIndex >= 0)
return m_activeSelectionAnchorIndex;
return optionToListIndex(selectedIndex());
}
int HTMLSelectElement::activeSelectionEndListIndex() const
{
if (m_activeSelectionEndIndex >= 0)
return m_activeSelectionEndIndex;
return lastSelectedListIndex();
}
ExceptionOr<void> HTMLSelectElement::add(const OptionOrOptGroupElement& element, const Optional<HTMLElementOrInt>& before)
{
RefPtr<HTMLElement> beforeElement;
if (before) {
beforeElement = WTF::switchOn(before.value(),
[](const RefPtr<HTMLElement>& element) -> HTMLElement* { return element.get(); },
[this](int index) -> HTMLElement* { return item(index); }
);
}
HTMLElement& toInsert = WTF::switchOn(element,
[](const auto& htmlElement) -> HTMLElement& { return *htmlElement; }
);
return insertBefore(toInsert, beforeElement.get());
}
void HTMLSelectElement::remove(int optionIndex)
{
int listIndex = optionToListIndex(optionIndex);
if (listIndex < 0)
return;
listItems()[listIndex]->remove();
}
String HTMLSelectElement::value() const
{
for (auto* item : listItems()) {
if (is<HTMLOptionElement>(*item)) {
HTMLOptionElement& option = downcast<HTMLOptionElement>(*item);
if (option.selected())
return option.value();
}
}
return emptyString();
}
void HTMLSelectElement::setValue(const String& value)
{
// Find the option with value() matching the given parameter and make it the current selection.
unsigned optionIndex = 0;
for (auto* item : listItems()) {
if (is<HTMLOptionElement>(*item)) {
if (downcast<HTMLOptionElement>(*item).value() == value) {
setSelectedIndex(optionIndex);
return;
}
++optionIndex;
}
}
setSelectedIndex(-1);
}
bool HTMLSelectElement::isPresentationAttribute(const QualifiedName& name) const
{
if (name == alignAttr) {
// Don't map 'align' attribute. This matches what Firefox, Opera and IE do.
// See http://bugs.webkit.org/show_bug.cgi?id=12072
return false;
}
return HTMLFormControlElementWithState::isPresentationAttribute(name);
}
void HTMLSelectElement::parseAttribute(const QualifiedName& name, const AtomicString& value)
{
if (name == sizeAttr) {
unsigned oldSize = m_size;
unsigned size = limitToOnlyHTMLNonNegative(value);
// Ensure that we've determined selectedness of the items at least once prior to changing the size.
if (oldSize != size)
updateListItemSelectedStates();
m_size = size;
updateValidity();
if (m_size != oldSize) {
invalidateStyleAndRenderersForSubtree();
setRecalcListItems();
updateValidity();
}
} else if (name == multipleAttr)
parseMultipleAttribute(value);
else
HTMLFormControlElementWithState::parseAttribute(name, value);
}
bool HTMLSelectElement::isKeyboardFocusable(KeyboardEvent* event) const
{
if (renderer())
return isFocusable();
return HTMLFormControlElementWithState::isKeyboardFocusable(event);
}
bool HTMLSelectElement::isMouseFocusable() const
{
if (renderer())
return isFocusable();
return HTMLFormControlElementWithState::isMouseFocusable();
}
bool HTMLSelectElement::canSelectAll() const
{
return !usesMenuList();
}
RenderPtr<RenderElement> HTMLSelectElement::createElementRenderer(RenderStyle&& style, const RenderTreePosition&)
{
#if !PLATFORM(IOS_FAMILY)
if (usesMenuList())
return createRenderer<RenderMenuList>(*this, WTFMove(style));
return createRenderer<RenderListBox>(*this, WTFMove(style));
#else
return createRenderer<RenderMenuList>(*this, WTFMove(style));
#endif
}
bool HTMLSelectElement::childShouldCreateRenderer(const Node& child) const
{
if (!HTMLFormControlElementWithState::childShouldCreateRenderer(child))
return false;
#if !PLATFORM(IOS_FAMILY)
if (!usesMenuList())
return is<HTMLOptionElement>(child) || is<HTMLOptGroupElement>(child) || validationMessageShadowTreeContains(child);
#endif
return validationMessageShadowTreeContains(child);
}
Ref<HTMLCollection> HTMLSelectElement::selectedOptions()
{
return ensureRareData().ensureNodeLists().addCachedCollection<GenericCachedHTMLCollection<CollectionTypeTraits<SelectedOptions>::traversalType>>(*this, SelectedOptions);
}
Ref<HTMLOptionsCollection> HTMLSelectElement::options()
{
return ensureRareData().ensureNodeLists().addCachedCollection<HTMLOptionsCollection>(*this, SelectOptions);
}
void HTMLSelectElement::updateListItemSelectedStates()
{
if (m_shouldRecalcListItems)
recalcListItems();
}
void HTMLSelectElement::childrenChanged(const ChildChange& change)
{
setRecalcListItems();
updateValidity();
m_lastOnChangeSelection.clear();
HTMLFormControlElementWithState::childrenChanged(change);
}
void HTMLSelectElement::optionElementChildrenChanged()
{
setRecalcListItems();
updateValidity();
if (auto* cache = document().existingAXObjectCache())
cache->childrenChanged(this);
}
void HTMLSelectElement::accessKeyAction(bool sendMouseEvents)
{
focus();
dispatchSimulatedClick(0, sendMouseEvents ? SendMouseUpDownEvents : SendNoEvents);
}
void HTMLSelectElement::setMultiple(bool multiple)
{
bool oldMultiple = this->multiple();
int oldSelectedIndex = selectedIndex();
setAttributeWithoutSynchronization(multipleAttr, multiple ? emptyAtom() : nullAtom());
// Restore selectedIndex after changing the multiple flag to preserve
// selection as single-line and multi-line has different defaults.
if (oldMultiple != this->multiple())
setSelectedIndex(oldSelectedIndex);
}
void HTMLSelectElement::setSize(unsigned size)
{
setUnsignedIntegralAttribute(sizeAttr, limitToOnlyHTMLNonNegative(size));
}
HTMLOptionElement* HTMLSelectElement::namedItem(const AtomicString& name)
{
return options()->namedItem(name);
}
HTMLOptionElement* HTMLSelectElement::item(unsigned index)
{
return options()->item(index);
}
ExceptionOr<void> HTMLSelectElement::setItem(unsigned index, HTMLOptionElement* option)
{
if (!option) {
remove(index);
return { };
}
if (index > maxSelectItems - 1)
index = maxSelectItems - 1;
int diff = index - length();
RefPtr<HTMLOptionElement> before;
// Out of array bounds? First insert empty dummies.
if (diff > 0) {
auto result = setLength(index);
if (result.hasException())
return result;
// Replace an existing entry?
} else if (diff < 0) {
before = item(index + 1);
remove(index);
}
// Finally add the new element.
auto result = add(option, HTMLElementOrInt { before.get() });
if (result.hasException())
return result;
if (diff >= 0 && option->selected())
optionSelectionStateChanged(*option, true);
return { };
}
ExceptionOr<void> HTMLSelectElement::setLength(unsigned newLength)
{
if (newLength > length() && newLength > maxSelectItems) {
document().addConsoleMessage(MessageSource::Other, MessageLevel::Warning, makeString("Blocked attempt to expand the option list to ", newLength, " items. The maximum number of items allowed is ", maxSelectItems, '.'));
return { };
}
int diff = length() - newLength;
if (diff < 0) { // Add dummy elements.
do {
auto result = add(HTMLOptionElement::create(document()).ptr(), WTF::nullopt);
if (result.hasException())
return result;
} while (++diff);
} else {
auto& items = listItems();
// Removing children fires mutation events, which might mutate the DOM further, so we first copy out a list
// of elements that we intend to remove then attempt to remove them one at a time.
Vector<Ref<HTMLOptionElement>> itemsToRemove;
size_t optionIndex = 0;
for (auto& item : items) {
if (is<HTMLOptionElement>(*item) && optionIndex++ >= newLength) {
ASSERT(item->parentNode());
itemsToRemove.append(downcast<HTMLOptionElement>(*item));
}
}
// FIXME: Clients can detect what order we remove the options in; is it good to remove them in ascending order?
// FIXME: This ignores exceptions. A previous version passed through the exception only for the last item removed.
// What exception behavior do we want?
for (auto& item : itemsToRemove)
item->remove();
}
return { };
}
bool HTMLSelectElement::isRequiredFormControl() const
{
return isRequired();
}
bool HTMLSelectElement::willRespondToMouseClickEvents()
{
#if PLATFORM(IOS_FAMILY)
return !isDisabledFormControl();
#else
return HTMLFormControlElementWithState::willRespondToMouseClickEvents();
#endif
}
// Returns the 1st valid item |skip| items from |listIndex| in direction |direction| if there is one.
// Otherwise, it returns the valid item closest to that boundary which is past |listIndex| if there is one.
// Otherwise, it returns |listIndex|.
// Valid means that it is enabled and an option element.
int HTMLSelectElement::nextValidIndex(int listIndex, SkipDirection direction, int skip) const
{
ASSERT(direction == -1 || direction == 1);
auto& listItems = this->listItems();
int lastGoodIndex = listIndex;
int size = listItems.size();
for (listIndex += direction; listIndex >= 0 && listIndex < size; listIndex += direction) {
--skip;
if (!listItems[listIndex]->isDisabledFormControl() && is<HTMLOptionElement>(*listItems[listIndex])) {
lastGoodIndex = listIndex;
if (skip <= 0)
break;
}
}
return lastGoodIndex;
}
int HTMLSelectElement::nextSelectableListIndex(int startIndex) const
{
return nextValidIndex(startIndex, SkipForwards, 1);
}
int HTMLSelectElement::previousSelectableListIndex(int startIndex) const
{
if (startIndex == -1)
startIndex = listItems().size();
return nextValidIndex(startIndex, SkipBackwards, 1);
}
int HTMLSelectElement::firstSelectableListIndex() const
{
auto& items = listItems();
int index = nextValidIndex(items.size(), SkipBackwards, INT_MAX);
if (static_cast<size_t>(index) == items.size())
return -1;
return index;
}
int HTMLSelectElement::lastSelectableListIndex() const
{
return nextValidIndex(-1, SkipForwards, INT_MAX);
}
// Returns the index of the next valid item one page away from |startIndex| in direction |direction|.
int HTMLSelectElement::nextSelectableListIndexPageAway(int startIndex, SkipDirection direction) const
{
auto& items = listItems();
// Can't use m_size because renderer forces a minimum size.
int pageSize = 0;
auto* renderer = this->renderer();
if (is<RenderListBox>(*renderer))
pageSize = downcast<RenderListBox>(*renderer).size() - 1; // -1 so we still show context.
// One page away, but not outside valid bounds.
// If there is a valid option item one page away, the index is chosen.
// If there is no exact one page away valid option, returns startIndex or the most far index.
int edgeIndex = direction == SkipForwards ? 0 : items.size() - 1;
int skipAmount = pageSize + (direction == SkipForwards ? startIndex : edgeIndex - startIndex);
return nextValidIndex(edgeIndex, direction, skipAmount);
}
void HTMLSelectElement::selectAll()
{
ASSERT(!usesMenuList());
if (!renderer() || !m_multiple)
return;
// Save the selection so it can be compared to the new selectAll selection
// when dispatching change events.
saveLastSelection();
m_activeSelectionState = true;
setActiveSelectionAnchorIndex(nextSelectableListIndex(-1));
setActiveSelectionEndIndex(previousSelectableListIndex(-1));
if (m_activeSelectionAnchorIndex < 0)
return;
updateListBoxSelection(false);
listBoxOnChange();
updateValidity();
}
void HTMLSelectElement::saveLastSelection()
{
if (usesMenuList()) {
m_lastOnChangeIndex = selectedIndex();
return;
}
m_lastOnChangeSelection.clear();
for (auto& element : listItems())
m_lastOnChangeSelection.append(is<HTMLOptionElement>(*element) && downcast<HTMLOptionElement>(*element).selected());
}
void HTMLSelectElement::setActiveSelectionAnchorIndex(int index)
{
m_activeSelectionAnchorIndex = index;
// Cache the selection state so we can restore the old selection as the new
// selection pivots around this anchor index.
m_cachedStateForActiveSelection.clear();
for (auto& element : listItems())
m_cachedStateForActiveSelection.append(is<HTMLOptionElement>(*element) && downcast<HTMLOptionElement>(*element).selected());
}
void HTMLSelectElement::setActiveSelectionEndIndex(int index)
{
m_activeSelectionEndIndex = index;
}
void HTMLSelectElement::updateListBoxSelection(bool deselectOtherOptions)
{
ASSERT(renderer());
#if !PLATFORM(IOS_FAMILY)
ASSERT(renderer()->isListBox() || m_multiple);
#else
ASSERT(renderer()->isMenuList() || m_multiple);
#endif
ASSERT(!listItems().size() || m_activeSelectionAnchorIndex >= 0);
unsigned start = std::min(m_activeSelectionAnchorIndex, m_activeSelectionEndIndex);
unsigned end = std::max(m_activeSelectionAnchorIndex, m_activeSelectionEndIndex);
auto& items = listItems();
for (unsigned i = 0; i < items.size(); ++i) {
auto& element = *items[i];
if (!is<HTMLOptionElement>(element) || downcast<HTMLOptionElement>(element).isDisabledFormControl())
continue;
if (i >= start && i <= end)
downcast<HTMLOptionElement>(element).setSelectedState(m_activeSelectionState);
else if (deselectOtherOptions || i >= m_cachedStateForActiveSelection.size())
downcast<HTMLOptionElement>(element).setSelectedState(false);
else
downcast<HTMLOptionElement>(element).setSelectedState(m_cachedStateForActiveSelection[i]);
}
scrollToSelection();
updateValidity();
}
void HTMLSelectElement::listBoxOnChange()
{
ASSERT(!usesMenuList() || m_multiple);
auto& items = listItems();
// If the cached selection list is empty, or the size has changed, then fire
// dispatchFormControlChangeEvent, and return early.
if (m_lastOnChangeSelection.isEmpty() || m_lastOnChangeSelection.size() != items.size()) {
dispatchFormControlChangeEvent();
return;
}
// Update m_lastOnChangeSelection and fire dispatchFormControlChangeEvent.
bool fireOnChange = false;
for (unsigned i = 0; i < items.size(); ++i) {
auto& element = *items[i];
bool selected = is<HTMLOptionElement>(element) && downcast<HTMLOptionElement>(element).selected();
if (selected != m_lastOnChangeSelection[i])
fireOnChange = true;
m_lastOnChangeSelection[i] = selected;
}
if (fireOnChange) {
dispatchInputEvent();
dispatchFormControlChangeEvent();
}
}
void HTMLSelectElement::dispatchChangeEventForMenuList()
{
ASSERT(usesMenuList());
int selected = selectedIndex();
if (m_lastOnChangeIndex != selected && m_isProcessingUserDrivenChange) {
m_lastOnChangeIndex = selected;
m_isProcessingUserDrivenChange = false;
dispatchInputEvent();
dispatchFormControlChangeEvent();
}
}
void HTMLSelectElement::scrollToSelection()
{
#if !PLATFORM(IOS_FAMILY)
if (usesMenuList())
return;
auto* renderer = this->renderer();
if (!is<RenderListBox>(renderer))
return;
downcast<RenderListBox>(*renderer).selectionChanged();
#else
if (auto* renderer = this->renderer())
renderer->repaint();
#endif
}
void HTMLSelectElement::setOptionsChangedOnRenderer()
{
if (auto* renderer = this->renderer()) {
#if !PLATFORM(IOS_FAMILY)
if (is<RenderMenuList>(*renderer))
downcast<RenderMenuList>(*renderer).setOptionsChanged(true);
else
downcast<RenderListBox>(*renderer).setOptionsChanged(true);
#else
downcast<RenderMenuList>(*renderer).setOptionsChanged(true);
#endif
}
}
const Vector<HTMLElement*>& HTMLSelectElement::listItems() const
{
if (m_shouldRecalcListItems)
recalcListItems();
else {
#if !ASSERT_DISABLED
Vector<HTMLElement*> items = m_listItems;
recalcListItems(false);
ASSERT(items == m_listItems);
#endif
}
return m_listItems;
}
void HTMLSelectElement::invalidateSelectedItems()
{
if (HTMLCollection* collection = cachedHTMLCollection(SelectedOptions))
collection->invalidateCache();
}
void HTMLSelectElement::setRecalcListItems()
{
m_shouldRecalcListItems = true;
// Manual selection anchor is reset when manipulating the select programmatically.
m_activeSelectionAnchorIndex = -1;
setOptionsChangedOnRenderer();
invalidateStyleForSubtree();
if (!isConnected()) {
if (HTMLCollection* collection = cachedHTMLCollection(SelectOptions))
collection->invalidateCache();
}
if (!isConnected())
invalidateSelectedItems();
if (auto* cache = document().existingAXObjectCache())
cache->childrenChanged(this);
}
void HTMLSelectElement::recalcListItems(bool updateSelectedStates) const
{
m_listItems.clear();
m_shouldRecalcListItems = false;
RefPtr<HTMLOptionElement> foundSelected;
RefPtr<HTMLOptionElement> firstOption;
for (RefPtr<Element> currentElement = ElementTraversal::firstWithin(*this); currentElement; ) {
if (!is<HTMLElement>(*currentElement)) {
currentElement = ElementTraversal::nextSkippingChildren(*currentElement, this);
continue;
}
HTMLElement& current = downcast<HTMLElement>(*currentElement);
// Only consider optgroup elements that are direct children of the select element.
if (is<HTMLOptGroupElement>(current) && current.parentNode() == this) {
m_listItems.append(&current);
if (RefPtr<Element> nextElement = ElementTraversal::firstWithin(current)) {
currentElement = nextElement;
continue;
}
}
if (is<HTMLOptionElement>(current)) {
m_listItems.append(&current);
if (updateSelectedStates && !m_multiple) {
HTMLOptionElement& option = downcast<HTMLOptionElement>(current);
if (!firstOption)
firstOption = &option;
if (option.selected()) {
if (foundSelected)
foundSelected->setSelectedState(false);
foundSelected = &option;
} else if (m_size <= 1 && !foundSelected && !option.isDisabledFormControl()) {
foundSelected = &option;
foundSelected->setSelectedState(true);
}
}
}
if (current.hasTagName(hrTag))
m_listItems.append(&current);
// In conforming HTML code, only <optgroup> and <option> will be found
// within a <select>. We call NodeTraversal::nextSkippingChildren so that we only step
// into those tags that we choose to. For web-compat, we should cope
// with the case where odd tags like a <div> have been added but we
// handle this because such tags have already been removed from the
// <select>'s subtree at this point.
currentElement = ElementTraversal::nextSkippingChildren(*currentElement, this);
}
if (!foundSelected && m_size <= 1 && firstOption && !firstOption->selected())
firstOption->setSelectedState(true);
}
int HTMLSelectElement::selectedIndex() const
{
unsigned index = 0;
// Return the number of the first option selected.
for (auto& element : listItems()) {
if (is<HTMLOptionElement>(*element)) {
if (downcast<HTMLOptionElement>(*element).selected())
return index;
++index;
}
}
return -1;
}
void HTMLSelectElement::setSelectedIndex(int index)
{
selectOption(index, DeselectOtherOptions);
}
void HTMLSelectElement::optionSelectionStateChanged(HTMLOptionElement& option, bool optionIsSelected)
{
ASSERT(option.ownerSelectElement() == this);
if (optionIsSelected)
selectOption(option.index());
else if (!usesMenuList())
selectOption(-1);
else
selectOption(nextSelectableListIndex(-1));
}
void HTMLSelectElement::selectOption(int optionIndex, SelectOptionFlags flags)
{
bool shouldDeselect = !m_multiple || (flags & DeselectOtherOptions);
auto& items = listItems();
int listIndex = optionToListIndex(optionIndex);
RefPtr<HTMLElement> element;
if (listIndex >= 0)
element = items[listIndex];
if (shouldDeselect)
deselectItemsWithoutValidation(element.get());
if (is<HTMLOptionElement>(element)) {
if (m_activeSelectionAnchorIndex < 0 || shouldDeselect)
setActiveSelectionAnchorIndex(listIndex);
if (m_activeSelectionEndIndex < 0 || shouldDeselect)
setActiveSelectionEndIndex(listIndex);
downcast<HTMLOptionElement>(*element).setSelectedState(true);
}
updateValidity();
// For the menu list case, this is what makes the selected element appear.
if (auto* renderer = this->renderer())
renderer->updateFromElement();
scrollToSelection();
if (usesMenuList()) {
m_isProcessingUserDrivenChange = flags & UserDriven;
if (flags & DispatchChangeEvent)
dispatchChangeEventForMenuList();
if (auto* renderer = this->renderer()) {
if (is<RenderMenuList>(*renderer))
downcast<RenderMenuList>(*renderer).didSetSelectedIndex(listIndex);
else
downcast<RenderListBox>(*renderer).selectionChanged();
}
}
}
int HTMLSelectElement::optionToListIndex(int optionIndex) const
{
auto& items = listItems();
int listSize = static_cast<int>(items.size());
if (optionIndex < 0 || optionIndex >= listSize)
return -1;
int optionIndex2 = -1;
for (int listIndex = 0; listIndex < listSize; ++listIndex) {
if (is<HTMLOptionElement>(*items[listIndex])) {
++optionIndex2;
if (optionIndex2 == optionIndex)
return listIndex;
}
}
return -1;
}
int HTMLSelectElement::listToOptionIndex(int listIndex) const
{
auto& items = listItems();
if (listIndex < 0 || listIndex >= static_cast<int>(items.size()) || !is<HTMLOptionElement>(*items[listIndex]))
return -1;
// Actual index of option not counting OPTGROUP entries that may be in list.
int optionIndex = 0;
for (int i = 0; i < listIndex; ++i) {
if (is<HTMLOptionElement>(*items[i]))
++optionIndex;
}
return optionIndex;
}
void HTMLSelectElement::dispatchFocusEvent(RefPtr<Element>&& oldFocusedElement, FocusDirection direction)
{
// Save the selection so it can be compared to the new selection when
// dispatching change events during blur event dispatch.
if (usesMenuList())
saveLastSelection();
HTMLFormControlElementWithState::dispatchFocusEvent(WTFMove(oldFocusedElement), direction);
}
void HTMLSelectElement::dispatchBlurEvent(RefPtr<Element>&& newFocusedElement)
{
// We only need to fire change events here for menu lists, because we fire
// change events for list boxes whenever the selection change is actually made.
// This matches other browsers' behavior.
if (usesMenuList())
dispatchChangeEventForMenuList();
HTMLFormControlElementWithState::dispatchBlurEvent(WTFMove(newFocusedElement));
}
void HTMLSelectElement::deselectItemsWithoutValidation(HTMLElement* excludeElement)
{
for (auto& element : listItems()) {
if (element != excludeElement && is<HTMLOptionElement>(*element))
downcast<HTMLOptionElement>(*element).setSelectedState(false);
}
}
FormControlState HTMLSelectElement::saveFormControlState() const
{
FormControlState state;
auto& items = listItems();
state.reserveInitialCapacity(items.size());
for (auto& element : items) {
if (!is<HTMLOptionElement>(*element))
continue;
auto& option = downcast<HTMLOptionElement>(*element);
if (!option.selected())
continue;
state.uncheckedAppend(option.value());
if (!multiple())
break;
}
return state;
}
size_t HTMLSelectElement::searchOptionsForValue(const String& value, size_t listIndexStart, size_t listIndexEnd) const
{
auto& items = listItems();
size_t loopEndIndex = std::min(items.size(), listIndexEnd);
for (size_t i = listIndexStart; i < loopEndIndex; ++i) {
if (!is<HTMLOptionElement>(*items[i]))
continue;
if (downcast<HTMLOptionElement>(*items[i]).value() == value)
return i;
}
return notFound;
}
void HTMLSelectElement::restoreFormControlState(const FormControlState& state)
{
recalcListItems();
auto& items = listItems();
size_t itemsSize = items.size();
if (!itemsSize)
return;
for (auto& element : items) {
if (!is<HTMLOptionElement>(*element))
continue;
downcast<HTMLOptionElement>(*element).setSelectedState(false);
}
if (!multiple()) {
size_t foundIndex = searchOptionsForValue(state[0], 0, itemsSize);
if (foundIndex != notFound)
downcast<HTMLOptionElement>(*items[foundIndex]).setSelectedState(true);
} else {
size_t startIndex = 0;
for (auto& value : state) {
size_t foundIndex = searchOptionsForValue(value, startIndex, itemsSize);
if (foundIndex == notFound)
foundIndex = searchOptionsForValue(value, 0, startIndex);
if (foundIndex == notFound)
continue;
downcast<HTMLOptionElement>(*items[foundIndex]).setSelectedState(true);
startIndex = foundIndex + 1;
}
}
setOptionsChangedOnRenderer();
updateValidity();
}
void HTMLSelectElement::parseMultipleAttribute(const AtomicString& value)
{
bool oldUsesMenuList = usesMenuList();
m_multiple = !value.isNull();
updateValidity();
if (oldUsesMenuList != usesMenuList())
invalidateStyleAndRenderersForSubtree();
}
bool HTMLSelectElement::appendFormData(DOMFormData& formData, bool)
{
const AtomicString& name = this->name();
if (name.isEmpty())
return false;
bool successful = false;
for (auto& element : listItems()) {
if (is<HTMLOptionElement>(*element) && downcast<HTMLOptionElement>(*element).selected() && !downcast<HTMLOptionElement>(*element).isDisabledFormControl()) {
formData.append(name, downcast<HTMLOptionElement>(*element).value());
successful = true;
}
}
// It's possible that this is a menulist with multiple options and nothing
// will be submitted (!successful). We won't send a unselected non-disabled
// option as fallback. This behavior matches to other browsers.
return successful;
}
void HTMLSelectElement::reset()
{
RefPtr<HTMLOptionElement> firstOption;
RefPtr<HTMLOptionElement> selectedOption;
for (auto& element : listItems()) {
if (!is<HTMLOptionElement>(*element))
continue;
HTMLOptionElement& option = downcast<HTMLOptionElement>(*element);
if (option.hasAttributeWithoutSynchronization(selectedAttr)) {
if (selectedOption && !m_multiple)
selectedOption->setSelectedState(false);
option.setSelectedState(true);
selectedOption = &option;
} else
option.setSelectedState(false);
if (!firstOption)
firstOption = &option;
}
if (!selectedOption && firstOption && !m_multiple && m_size <= 1)
firstOption->setSelectedState(true);
setOptionsChangedOnRenderer();
invalidateStyleForSubtree();
updateValidity();
}
#if !PLATFORM(WIN)
bool HTMLSelectElement::platformHandleKeydownEvent(KeyboardEvent* event)
{
if (!RenderTheme::singleton().popsMenuByArrowKeys())
return false;
if (!isSpatialNavigationEnabled(document().frame())) {
if (event->keyIdentifier() == "Down" || event->keyIdentifier() == "Up") {
focus();
// Calling focus() may cause us to lose our renderer. Return true so
// that our caller doesn't process the event further, but don't set
// the event as handled.
auto* renderer = this->renderer();
if (!is<RenderMenuList>(renderer))
return true;
// Save the selection so it can be compared to the new selection
// when dispatching change events during selectOption, which
// gets called from RenderMenuList::valueChanged, which gets called
// after the user makes a selection from the menu.
saveLastSelection();
downcast<RenderMenuList>(*renderer).showPopup();
event->setDefaultHandled();
}
return true;
}
return false;
}
#endif
void HTMLSelectElement::menuListDefaultEventHandler(Event& event)
{
ASSERT(renderer());
ASSERT(renderer()->isMenuList());
if (event.type() == eventNames().keydownEvent) {
if (!is<KeyboardEvent>(event))
return;
KeyboardEvent& keyboardEvent = downcast<KeyboardEvent>(event);
if (platformHandleKeydownEvent(&keyboardEvent))
return;
// When using spatial navigation, we want to be able to navigate away
// from the select element when the user hits any of the arrow keys,
// instead of changing the selection.
if (isSpatialNavigationEnabled(document().frame())) {
if (!m_activeSelectionState)
return;
}
const String& keyIdentifier = keyboardEvent.keyIdentifier();
bool handled = true;
auto& listItems = this->listItems();
int listIndex = optionToListIndex(selectedIndex());
// When using caret browsing, we want to be able to move the focus
// out of the select element when user hits a left or right arrow key.
if (document().settings().caretBrowsingEnabled()) {
if (keyIdentifier == "Left" || keyIdentifier == "Right")
return;
}
if (keyIdentifier == "Down" || keyIdentifier == "Right")
listIndex = nextValidIndex(listIndex, SkipForwards, 1);
else if (keyIdentifier == "Up" || keyIdentifier == "Left")
listIndex = nextValidIndex(listIndex, SkipBackwards, 1);
else if (keyIdentifier == "PageDown")
listIndex = nextValidIndex(listIndex, SkipForwards, 3);
else if (keyIdentifier == "PageUp")
listIndex = nextValidIndex(listIndex, SkipBackwards, 3);
else if (keyIdentifier == "Home")
listIndex = nextValidIndex(-1, SkipForwards, 1);
else if (keyIdentifier == "End")
listIndex = nextValidIndex(listItems.size(), SkipBackwards, 1);
else
handled = false;
if (handled && static_cast<size_t>(listIndex) < listItems.size())
selectOption(listToOptionIndex(listIndex), DeselectOtherOptions | DispatchChangeEvent | UserDriven);
if (handled)
keyboardEvent.setDefaultHandled();
}
// Use key press event here since sending simulated mouse events
// on key down blocks the proper sending of the key press event.
if (event.type() == eventNames().keypressEvent) {
if (!is<KeyboardEvent>(event))
return;
KeyboardEvent& keyboardEvent = downcast<KeyboardEvent>(event);
int keyCode = keyboardEvent.keyCode();
bool handled = false;
if (keyCode == ' ' && isSpatialNavigationEnabled(document().frame())) {
// Use space to toggle arrow key handling for selection change or spatial navigation.
m_activeSelectionState = !m_activeSelectionState;
keyboardEvent.setDefaultHandled();
return;
}
if (RenderTheme::singleton().popsMenuBySpaceOrReturn()) {
if (keyCode == ' ' || keyCode == '\r') {
focus();
// Calling focus() may remove the renderer or change the renderer type.
auto* renderer = this->renderer();
if (!is<RenderMenuList>(renderer))
return;
// Save the selection so it can be compared to the new selection
// when dispatching change events during selectOption, which
// gets called from RenderMenuList::valueChanged, which gets called
// after the user makes a selection from the menu.
saveLastSelection();
downcast<RenderMenuList>(*renderer).showPopup();
handled = true;
}
} else if (RenderTheme::singleton().popsMenuByArrowKeys()) {
if (keyCode == ' ') {
focus();
// Calling focus() may remove the renderer or change the renderer type.
auto* renderer = this->renderer();
if (!is<RenderMenuList>(renderer))
return;
// Save the selection so it can be compared to the new selection
// when dispatching change events during selectOption, which
// gets called from RenderMenuList::valueChanged, which gets called
// after the user makes a selection from the menu.
saveLastSelection();
downcast<RenderMenuList>(*renderer).showPopup();
handled = true;
} else if (keyCode == '\r') {
if (form())
form()->submitImplicitly(keyboardEvent, false);
dispatchChangeEventForMenuList();
handled = true;
}
}
if (handled)
keyboardEvent.setDefaultHandled();
}
if (event.type() == eventNames().mousedownEvent && is<MouseEvent>(event) && downcast<MouseEvent>(event).button() == LeftButton) {
focus();
#if !PLATFORM(IOS_FAMILY)
auto* renderer = this->renderer();
if (is<RenderMenuList>(renderer)) {
auto& menuList = downcast<RenderMenuList>(*renderer);
ASSERT(!menuList.popupIsVisible());
// Save the selection so it can be compared to the new
// selection when we call onChange during selectOption,
// which gets called from RenderMenuList::valueChanged,
// which gets called after the user makes a selection from
// the menu.
saveLastSelection();
menuList.showPopup();
}
#endif
event.setDefaultHandled();
}
#if !PLATFORM(IOS_FAMILY)
if (event.type() == eventNames().blurEvent && !focused()) {
auto& menuList = downcast<RenderMenuList>(*renderer());
if (menuList.popupIsVisible())
menuList.hidePopup();
}
#endif
}
void HTMLSelectElement::updateSelectedState(int listIndex, bool multi, bool shift)
{
auto& items = listItems();
int listSize = static_cast<int>(items.size());
if (listIndex < 0 || listIndex >= listSize)
return;
// Save the selection so it can be compared to the new selection when
// dispatching change events during mouseup, or after autoscroll finishes.
saveLastSelection();
m_activeSelectionState = true;
bool shiftSelect = m_multiple && shift;
bool multiSelect = m_multiple && multi && !shift;
auto& clickedElement = *items[listIndex];
if (is<HTMLOptionElement>(clickedElement)) {
// Keep track of whether an active selection (like during drag
// selection), should select or deselect.
if (downcast<HTMLOptionElement>(clickedElement).selected() && multiSelect)
m_activeSelectionState = false;
if (!m_activeSelectionState)
downcast<HTMLOptionElement>(clickedElement).setSelectedState(false);
}
// If we're not in any special multiple selection mode, then deselect all
// other items, excluding the clicked option. If no option was clicked, then
// this will deselect all items in the list.
if (!shiftSelect && !multiSelect)
deselectItemsWithoutValidation(&clickedElement);
// If the anchor hasn't been set, and we're doing a single selection or a
// shift selection, then initialize the anchor to the first selected index.
if (m_activeSelectionAnchorIndex < 0 && !multiSelect)
setActiveSelectionAnchorIndex(selectedIndex());
// Set the selection state of the clicked option.
if (is<HTMLOptionElement>(clickedElement) && !downcast<HTMLOptionElement>(clickedElement).isDisabledFormControl())
downcast<HTMLOptionElement>(clickedElement).setSelectedState(true);
// If there was no selectedIndex() for the previous initialization, or If
// we're doing a single selection, or a multiple selection (using cmd or
// ctrl), then initialize the anchor index to the listIndex that just got
// clicked.
if (m_activeSelectionAnchorIndex < 0 || !shiftSelect)
setActiveSelectionAnchorIndex(listIndex);
setActiveSelectionEndIndex(listIndex);
updateListBoxSelection(!multiSelect);
}
void HTMLSelectElement::listBoxDefaultEventHandler(Event& event)
{
auto& listItems = this->listItems();
if (event.type() == eventNames().mousedownEvent && is<MouseEvent>(event) && downcast<MouseEvent>(event).button() == LeftButton) {
focus();
// Calling focus() may remove or change our renderer, in which case we don't want to handle the event further.
auto* renderer = this->renderer();
if (!is<RenderListBox>(renderer))
return;
auto& renderListBox = downcast<RenderListBox>(*renderer);
// Convert to coords relative to the list box if needed.
MouseEvent& mouseEvent = downcast<MouseEvent>(event);
IntPoint localOffset = roundedIntPoint(renderListBox.absoluteToLocal(mouseEvent.absoluteLocation(), UseTransforms));
int listIndex = renderListBox.listIndexAtOffset(toIntSize(localOffset));
if (listIndex >= 0) {
if (!isDisabledFormControl()) {
#if PLATFORM(COCOA)
updateSelectedState(listIndex, mouseEvent.metaKey(), mouseEvent.shiftKey());
#else
updateSelectedState(listIndex, mouseEvent.ctrlKey(), mouseEvent.shiftKey());
#endif
}
if (RefPtr<Frame> frame = document().frame())
frame->eventHandler().setMouseDownMayStartAutoscroll();
mouseEvent.setDefaultHandled();
}
} else if (event.type() == eventNames().mousemoveEvent && is<MouseEvent>(event) && !downcast<RenderListBox>(*renderer()).canBeScrolledAndHasScrollableArea()) {
MouseEvent& mouseEvent = downcast<MouseEvent>(event);
if (mouseEvent.button() != LeftButton || !mouseEvent.buttonDown())
return;
auto& renderListBox = downcast<RenderListBox>(*renderer());
IntPoint localOffset = roundedIntPoint(renderListBox.absoluteToLocal(mouseEvent.absoluteLocation(), UseTransforms));
int listIndex = renderListBox.listIndexAtOffset(toIntSize(localOffset));
if (listIndex >= 0) {
if (!isDisabledFormControl()) {
if (m_multiple) {
// Only extend selection if there is something selected.
if (m_activeSelectionAnchorIndex < 0)
return;
setActiveSelectionEndIndex(listIndex);
updateListBoxSelection(false);
} else {
setActiveSelectionAnchorIndex(listIndex);
setActiveSelectionEndIndex(listIndex);
updateListBoxSelection(true);
}
}
mouseEvent.setDefaultHandled();
}
} else if (event.type() == eventNames().mouseupEvent && is<MouseEvent>(event) && downcast<MouseEvent>(event).button() == LeftButton && document().frame()->eventHandler().autoscrollRenderer() != renderer()) {
// This click or drag event was not over any of the options.
if (m_lastOnChangeSelection.isEmpty())
return;
// This makes sure we fire dispatchFormControlChangeEvent for a single
// click. For drag selection, onChange will fire when the autoscroll
// timer stops.
listBoxOnChange();
} else if (event.type() == eventNames().keydownEvent) {
if (!is<KeyboardEvent>(event))
return;
KeyboardEvent& keyboardEvent = downcast<KeyboardEvent>(event);
const String& keyIdentifier = keyboardEvent.keyIdentifier();
bool handled = false;
int endIndex = 0;
if (m_activeSelectionEndIndex < 0) {
// Initialize the end index
if (keyIdentifier == "Down" || keyIdentifier == "PageDown") {
int startIndex = lastSelectedListIndex();
handled = true;
if (keyIdentifier == "Down")
endIndex = nextSelectableListIndex(startIndex);
else
endIndex = nextSelectableListIndexPageAway(startIndex, SkipForwards);
} else if (keyIdentifier == "Up" || keyIdentifier == "PageUp") {
int startIndex = optionToListIndex(selectedIndex());
handled = true;
if (keyIdentifier == "Up")
endIndex = previousSelectableListIndex(startIndex);
else
endIndex = nextSelectableListIndexPageAway(startIndex, SkipBackwards);
}
} else {
// Set the end index based on the current end index.
if (keyIdentifier == "Down") {
endIndex = nextSelectableListIndex(m_activeSelectionEndIndex);
handled = true;
} else if (keyIdentifier == "Up") {
endIndex = previousSelectableListIndex(m_activeSelectionEndIndex);
handled = true;
} else if (keyIdentifier == "PageDown") {
endIndex = nextSelectableListIndexPageAway(m_activeSelectionEndIndex, SkipForwards);
handled = true;
} else if (keyIdentifier == "PageUp") {
endIndex = nextSelectableListIndexPageAway(m_activeSelectionEndIndex, SkipBackwards);
handled = true;
}
}
if (keyIdentifier == "Home") {
endIndex = firstSelectableListIndex();
handled = true;
} else if (keyIdentifier == "End") {
endIndex = lastSelectableListIndex();
handled = true;
}
if (isSpatialNavigationEnabled(document().frame()))
// Check if the selection moves to the boundary.
if (keyIdentifier == "Left" || keyIdentifier == "Right" || ((keyIdentifier == "Down" || keyIdentifier == "Up") && endIndex == m_activeSelectionEndIndex))
return;
if (endIndex >= 0 && handled) {
// Save the selection so it can be compared to the new selection
// when dispatching change events immediately after making the new
// selection.
saveLastSelection();
ASSERT_UNUSED(listItems, !listItems.size() || static_cast<size_t>(endIndex) < listItems.size());
setActiveSelectionEndIndex(endIndex);
#if PLATFORM(COCOA)
m_allowsNonContiguousSelection = m_multiple && isSpatialNavigationEnabled(document().frame());
#else
m_allowsNonContiguousSelection = m_multiple && (isSpatialNavigationEnabled(document().frame()) || keyboardEvent.ctrlKey());
#endif
bool selectNewItem = keyboardEvent.shiftKey() || !m_allowsNonContiguousSelection;
if (selectNewItem)
m_activeSelectionState = true;
// If the anchor is unitialized, or if we're going to deselect all
// other options, then set the anchor index equal to the end index.
bool deselectOthers = !m_multiple || (!keyboardEvent.shiftKey() && selectNewItem);
if (m_activeSelectionAnchorIndex < 0 || deselectOthers) {
if (deselectOthers)
deselectItemsWithoutValidation();
setActiveSelectionAnchorIndex(m_activeSelectionEndIndex);
}
downcast<RenderListBox>(*renderer()).scrollToRevealElementAtListIndex(endIndex);
if (selectNewItem) {
updateListBoxSelection(deselectOthers);
listBoxOnChange();
} else
scrollToSelection();
keyboardEvent.setDefaultHandled();
}
} else if (event.type() == eventNames().keypressEvent) {
if (!is<KeyboardEvent>(event))
return;
KeyboardEvent& keyboardEvent = downcast<KeyboardEvent>(event);
int keyCode = keyboardEvent.keyCode();
if (keyCode == '\r') {
if (form())
form()->submitImplicitly(keyboardEvent, false);
keyboardEvent.setDefaultHandled();
} else if (m_multiple && keyCode == ' ' && m_allowsNonContiguousSelection) {
// Use space to toggle selection change.
m_activeSelectionState = !m_activeSelectionState;
ASSERT(m_activeSelectionEndIndex >= 0);
ASSERT(m_activeSelectionEndIndex < static_cast<int>(listItems.size()));
ASSERT(is<HTMLOptionElement>(*listItems[m_activeSelectionEndIndex]));
updateSelectedState(m_activeSelectionEndIndex, true /*multi*/, false /*shift*/);
listBoxOnChange();
keyboardEvent.setDefaultHandled();
}
}
}
void HTMLSelectElement::defaultEventHandler(Event& event)
{
auto* renderer = this->renderer();
if (!renderer)
return;
#if !PLATFORM(IOS_FAMILY)
if (isDisabledFormControl()) {
HTMLFormControlElementWithState::defaultEventHandler(event);
return;
}
if (renderer->isMenuList())
menuListDefaultEventHandler(event);
else
listBoxDefaultEventHandler(event);
#else
menuListDefaultEventHandler(event);
#endif
if (event.defaultHandled())
return;
if (event.type() == eventNames().keypressEvent && is<KeyboardEvent>(event)) {
KeyboardEvent& keyboardEvent = downcast<KeyboardEvent>(event);
if (!keyboardEvent.ctrlKey() && !keyboardEvent.altKey() && !keyboardEvent.metaKey() && u_isprint(keyboardEvent.charCode())) {
typeAheadFind(keyboardEvent);
event.setDefaultHandled();
return;
}
}
HTMLFormControlElementWithState::defaultEventHandler(event);
}
int HTMLSelectElement::lastSelectedListIndex() const
{
auto& items = listItems();
for (size_t i = items.size(); i;) {
auto& element = *items[--i];
if (is<HTMLOptionElement>(element) && downcast<HTMLOptionElement>(element).selected())
return i;
}
return -1;
}
int HTMLSelectElement::indexOfSelectedOption() const
{
return optionToListIndex(selectedIndex());
}
int HTMLSelectElement::optionCount() const
{
return listItems().size();
}
String HTMLSelectElement::optionAtIndex(int index) const
{
auto& element = *listItems()[index];
if (!is<HTMLOptionElement>(element) || downcast<HTMLOptionElement>(element).isDisabledFormControl())
return String();
return downcast<HTMLOptionElement>(element).textIndentedToRespectGroupLabel();
}
void HTMLSelectElement::typeAheadFind(KeyboardEvent& event)
{
int index = m_typeAhead.handleEvent(&event, TypeAhead::MatchPrefix | TypeAhead::CycleFirstChar);
if (index < 0)
return;
selectOption(listToOptionIndex(index), DeselectOtherOptions | DispatchChangeEvent | UserDriven);
if (!usesMenuList())
listBoxOnChange();
}
Node::InsertedIntoAncestorResult HTMLSelectElement::insertedIntoAncestor(InsertionType insertionType, ContainerNode& parentOfInsertedTree)
{
// When the element is created during document parsing, it won't have any
// items yet - but for innerHTML and related methods, this method is called
// after the whole subtree is constructed.
recalcListItems();
return HTMLFormControlElementWithState::insertedIntoAncestor(insertionType, parentOfInsertedTree);
}
void HTMLSelectElement::accessKeySetSelectedIndex(int index)
{
// First bring into focus the list box.
if (!focused())
accessKeyAction(false);
// If this index is already selected, unselect. otherwise update the selected index.
auto& items = listItems();
int listIndex = optionToListIndex(index);
if (listIndex >= 0) {
auto& element = *items[listIndex];
if (is<HTMLOptionElement>(element)) {
if (downcast<HTMLOptionElement>(element).selected())
downcast<HTMLOptionElement>(element).setSelectedState(false);
else
selectOption(index, DispatchChangeEvent | UserDriven);
}
}
if (usesMenuList())
dispatchChangeEventForMenuList();
else
listBoxOnChange();
scrollToSelection();
}
unsigned HTMLSelectElement::length() const
{
unsigned options = 0;
auto& items = listItems();
for (unsigned i = 0; i < items.size(); ++i) {
if (is<HTMLOptionElement>(*items[i]))
++options;
}
return options;
}
} // namespace