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gecko-dev/dom/html/HTMLSelectElement.cpp

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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#include "mozilla/dom/HTMLSelectElement.h"
#include "mozAutoDocUpdate.h"
#include "mozilla/Attributes.h"
#include "mozilla/BasicEvents.h"
#include "mozilla/EventDispatcher.h"
#include "mozilla/EventStates.h"
#include "mozilla/dom/Element.h"
#include "mozilla/dom/HTMLFormSubmission.h"
#include "mozilla/dom/HTMLOptGroupElement.h"
#include "mozilla/dom/HTMLOptionElement.h"
#include "mozilla/dom/HTMLSelectElementBinding.h"
#include "mozilla/dom/UnionTypes.h"
#include "mozilla/MappedDeclarations.h"
#include "nsContentCreatorFunctions.h"
#include "nsContentList.h"
#include "nsError.h"
#include "nsGkAtoms.h"
#include "nsComboboxControlFrame.h"
#include "mozilla/dom/Document.h"
#include "nsIFormControlFrame.h"
#include "nsIForm.h"
#include "nsIFormProcessor.h"
#include "nsIFrame.h"
#include "nsListControlFrame.h"
#include "nsISelectControlFrame.h"
#include "nsLayoutUtils.h"
#include "nsMappedAttributes.h"
#include "mozilla/PresState.h"
#include "nsServiceManagerUtils.h"
#include "nsStyleConsts.h"
#include "nsTextNode.h"
NS_IMPL_NS_NEW_HTML_ELEMENT_CHECK_PARSER(Select)
namespace mozilla {
namespace dom {
//----------------------------------------------------------------------
//
// SafeOptionListMutation
//
SafeOptionListMutation::SafeOptionListMutation(nsIContent* aSelect,
nsIContent* aParent,
nsIContent* aKid,
uint32_t aIndex, bool aNotify)
: mSelect(HTMLSelectElement::FromNodeOrNull(aSelect)),
mTopLevelMutation(false),
mNeedsRebuild(false),
mNotify(aNotify),
mInitialSelectedIndex(-1) {
if (mSelect) {
mInitialSelectedIndex = mSelect->SelectedIndex();
mTopLevelMutation = !mSelect->mMutating;
if (mTopLevelMutation) {
mSelect->mMutating = true;
} else {
// This is very unfortunate, but to handle mutation events properly,
// option list must be up-to-date before inserting or removing options.
// Fortunately this is called only if mutation event listener
// adds or removes options.
mSelect->RebuildOptionsArray(mNotify);
}
nsresult rv;
if (aKid) {
rv = mSelect->WillAddOptions(aKid, aParent, aIndex, mNotify);
} else {
rv = mSelect->WillRemoveOptions(aParent, aIndex, mNotify);
}
mNeedsRebuild = NS_FAILED(rv);
}
}
SafeOptionListMutation::~SafeOptionListMutation() {
if (mSelect) {
if (mNeedsRebuild || (mTopLevelMutation && mGuard.Mutated(1))) {
mSelect->RebuildOptionsArray(true);
}
if (mTopLevelMutation) {
mSelect->mMutating = false;
}
if (mSelect->SelectedIndex() != mInitialSelectedIndex) {
// We must have triggered the SelectSomething() codepath, which can cause
// our validity to change. Unfortunately, our attempt to update validity
// in that case may not have worked correctly, because we actually call it
// before we have inserted the new <option>s into the DOM! Go ahead and
// update validity here as needed, because by now we know our <option>s
// are where they should be.
mSelect->UpdateValueMissingValidityState();
mSelect->UpdateState(mNotify);
}
#ifdef DEBUG
mSelect->VerifyOptionsArray();
#endif
}
}
//----------------------------------------------------------------------
//
// HTMLSelectElement
//
// construction, destruction
HTMLSelectElement::HTMLSelectElement(
already_AddRefed<mozilla::dom::NodeInfo>&& aNodeInfo,
FromParser aFromParser)
: nsGenericHTMLFormElementWithState(std::move(aNodeInfo), NS_FORM_SELECT),
mOptions(new HTMLOptionsCollection(this)),
mAutocompleteAttrState(nsContentUtils::eAutocompleteAttrState_Unknown),
mAutocompleteInfoState(nsContentUtils::eAutocompleteAttrState_Unknown),
mIsDoneAddingChildren(!aFromParser),
mDisabledChanged(false),
mMutating(false),
mInhibitStateRestoration(!!(aFromParser & FROM_PARSER_FRAGMENT)),
mSelectionHasChanged(false),
mDefaultSelectionSet(false),
mCanShowInvalidUI(true),
mCanShowValidUI(true),
mNonOptionChildren(0),
mOptGroupCount(0),
mSelectedIndex(-1) {
SetHasWeirdParserInsertionMode();
// DoneAddingChildren() will be called later if it's from the parser,
// otherwise it is
// Set up our default state: enabled, optional, and valid.
AddStatesSilently(NS_EVENT_STATE_ENABLED | NS_EVENT_STATE_OPTIONAL |
NS_EVENT_STATE_VALID);
}
// ISupports
NS_IMPL_CYCLE_COLLECTION_CLASS(HTMLSelectElement)
NS_IMPL_CYCLE_COLLECTION_TRAVERSE_BEGIN_INHERITED(
HTMLSelectElement, nsGenericHTMLFormElementWithState)
NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mValidity)
NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mOptions)
NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mSelectedOptions)
NS_IMPL_CYCLE_COLLECTION_TRAVERSE_END
NS_IMPL_CYCLE_COLLECTION_UNLINK_BEGIN_INHERITED(
HTMLSelectElement, nsGenericHTMLFormElementWithState)
NS_IMPL_CYCLE_COLLECTION_UNLINK(mValidity)
NS_IMPL_CYCLE_COLLECTION_UNLINK(mSelectedOptions)
NS_IMPL_CYCLE_COLLECTION_UNLINK_END
NS_IMPL_ISUPPORTS_CYCLE_COLLECTION_INHERITED(HTMLSelectElement,
nsGenericHTMLFormElementWithState,
nsIConstraintValidation)
// nsIDOMHTMLSelectElement
NS_IMPL_ELEMENT_CLONE(HTMLSelectElement)
void HTMLSelectElement::SetCustomValidity(const nsAString& aError) {
nsIConstraintValidation::SetCustomValidity(aError);
UpdateState(true);
}
void HTMLSelectElement::GetAutocomplete(DOMString& aValue) {
const nsAttrValue* attributeVal = GetParsedAttr(nsGkAtoms::autocomplete);
mAutocompleteAttrState = nsContentUtils::SerializeAutocompleteAttribute(
attributeVal, aValue, mAutocompleteAttrState);
}
void HTMLSelectElement::GetAutocompleteInfo(AutocompleteInfo& aInfo) {
const nsAttrValue* attributeVal = GetParsedAttr(nsGkAtoms::autocomplete);
mAutocompleteInfoState = nsContentUtils::SerializeAutocompleteAttribute(
attributeVal, aInfo, mAutocompleteInfoState, true);
}
nsresult HTMLSelectElement::InsertChildBefore(nsIContent* aKid,
nsIContent* aBeforeThis,
bool aNotify) {
int32_t index = aBeforeThis ? ComputeIndexOf(aBeforeThis) : GetChildCount();
SafeOptionListMutation safeMutation(this, this, aKid, index, aNotify);
nsresult rv = nsGenericHTMLFormElementWithState::InsertChildBefore(
aKid, aBeforeThis, aNotify);
if (NS_FAILED(rv)) {
safeMutation.MutationFailed();
}
return rv;
}
void HTMLSelectElement::RemoveChildNode(nsIContent* aKid, bool aNotify) {
SafeOptionListMutation safeMutation(this, this, nullptr, ComputeIndexOf(aKid),
aNotify);
nsGenericHTMLFormElementWithState::RemoveChildNode(aKid, aNotify);
}
void HTMLSelectElement::InsertOptionsIntoList(nsIContent* aOptions,
int32_t aListIndex,
int32_t aDepth, bool aNotify) {
MOZ_ASSERT(aDepth == 0 || aDepth == 1);
int32_t insertIndex = aListIndex;
HTMLOptionElement* optElement = HTMLOptionElement::FromNode(aOptions);
if (optElement) {
mOptions->InsertOptionAt(optElement, insertIndex);
insertIndex++;
} else if (aDepth == 0) {
// If it's at the top level, then we just found out there are non-options
// at the top level, which will throw off the insert count
mNonOptionChildren++;
// Deal with optgroups
if (aOptions->IsHTMLElement(nsGkAtoms::optgroup)) {
mOptGroupCount++;
for (nsIContent* child = aOptions->GetFirstChild(); child;
child = child->GetNextSibling()) {
optElement = HTMLOptionElement::FromNode(child);
if (optElement) {
mOptions->InsertOptionAt(optElement, insertIndex);
insertIndex++;
}
}
}
} // else ignore even if optgroup; we want to ignore nested optgroups.
// Deal with the selected list
if (insertIndex - aListIndex) {
// Fix the currently selected index
if (aListIndex <= mSelectedIndex) {
mSelectedIndex += (insertIndex - aListIndex);
SetSelectionChanged(true, aNotify);
}
// Get the frame stuff for notification. No need to flush here
// since if there's no frame for the select yet the select will
// get into the right state once it's created.
nsISelectControlFrame* selectFrame = nullptr;
AutoWeakFrame weakSelectFrame;
bool didGetFrame = false;
// Actually select the options if the added options warrant it
for (int32_t i = aListIndex; i < insertIndex; i++) {
// Notify the frame that the option is added
if (!didGetFrame || (selectFrame && !weakSelectFrame.IsAlive())) {
selectFrame = GetSelectFrame();
weakSelectFrame = do_QueryFrame(selectFrame);
didGetFrame = true;
}
if (selectFrame) {
selectFrame->AddOption(i);
}
RefPtr<HTMLOptionElement> option = Item(i);
if (option && option->Selected()) {
// Clear all other options
if (!HasAttr(kNameSpaceID_None, nsGkAtoms::multiple)) {
uint32_t mask = IS_SELECTED | CLEAR_ALL | SET_DISABLED | NOTIFY;
SetOptionsSelectedByIndex(i, i, mask);
}
// This is sort of a hack ... we need to notify that the option was
// set and change selectedIndex even though we didn't really change
// its value.
OnOptionSelected(selectFrame, i, true, false, false);
}
}
CheckSelectSomething(aNotify);
}
}
nsresult HTMLSelectElement::RemoveOptionsFromList(nsIContent* aOptions,
int32_t aListIndex,
int32_t aDepth,
bool aNotify) {
MOZ_ASSERT(aDepth == 0 || aDepth == 1);
int32_t numRemoved = 0;
HTMLOptionElement* optElement = HTMLOptionElement::FromNode(aOptions);
if (optElement) {
if (mOptions->ItemAsOption(aListIndex) != optElement) {
NS_ERROR("wrong option at index");
return NS_ERROR_UNEXPECTED;
}
mOptions->RemoveOptionAt(aListIndex);
numRemoved++;
} else if (aDepth == 0) {
// Yay, one less artifact at the top level.
mNonOptionChildren--;
// Recurse down deeper for options
if (mOptGroupCount && aOptions->IsHTMLElement(nsGkAtoms::optgroup)) {
mOptGroupCount--;
for (nsIContent* child = aOptions->GetFirstChild(); child;
child = child->GetNextSibling()) {
optElement = HTMLOptionElement::FromNode(child);
if (optElement) {
if (mOptions->ItemAsOption(aListIndex) != optElement) {
NS_ERROR("wrong option at index");
return NS_ERROR_UNEXPECTED;
}
mOptions->RemoveOptionAt(aListIndex);
numRemoved++;
}
}
}
} // else don't check for an optgroup; we want to ignore nested optgroups
if (numRemoved) {
// Tell the widget we removed the options
nsISelectControlFrame* selectFrame = GetSelectFrame();
if (selectFrame) {
nsAutoScriptBlocker scriptBlocker;
for (int32_t i = aListIndex; i < aListIndex + numRemoved; ++i) {
selectFrame->RemoveOption(i);
}
}
// Fix the selected index
if (aListIndex <= mSelectedIndex) {
if (mSelectedIndex < (aListIndex + numRemoved)) {
// aListIndex <= mSelectedIndex < aListIndex+numRemoved
// Find a new selected index if it was one of the ones removed.
FindSelectedIndex(aListIndex, aNotify);
} else {
// Shift the selected index if something in front of it was removed
// aListIndex+numRemoved <= mSelectedIndex
mSelectedIndex -= numRemoved;
SetSelectionChanged(true, aNotify);
}
}
// Select something in case we removed the selected option on a
// single select
if (!CheckSelectSomething(aNotify) && mSelectedIndex == -1) {
// Update the validity state in case of we've just removed the last
// option.
UpdateValueMissingValidityState();
UpdateState(aNotify);
}
}
return NS_OK;
}
// XXXldb Doing the processing before the content nodes have been added
// to the document (as the name of this function seems to require, and
// as the callers do), is highly unusual. Passing around unparented
// content to other parts of the app can make those things think the
// options are the root content node.
NS_IMETHODIMP
HTMLSelectElement::WillAddOptions(nsIContent* aOptions, nsIContent* aParent,
int32_t aContentIndex, bool aNotify) {
if (this != aParent && this != aParent->GetParent()) {
return NS_OK;
}
int32_t level = aParent == this ? 0 : 1;
// Get the index where the options will be inserted
int32_t ind = -1;
if (!mNonOptionChildren) {
// If there are no artifacts, aContentIndex == ind
ind = aContentIndex;
} else {
// If there are artifacts, we have to get the index of the option the
// hard way
int32_t children = aParent->GetChildCount();
if (aContentIndex >= children) {
// If the content insert is after the end of the parent, then we want to
// get the next index *after* the parent and insert there.
ind = GetOptionIndexAfter(aParent);
} else {
// If the content insert is somewhere in the middle of the container, then
// we want to get the option currently at the index and insert in front of
// that.
nsIContent* currentKid = aParent->GetChildAt_Deprecated(aContentIndex);
NS_ASSERTION(currentKid, "Child not found!");
if (currentKid) {
ind = GetOptionIndexAt(currentKid);
} else {
ind = -1;
}
}
}
InsertOptionsIntoList(aOptions, ind, level, aNotify);
return NS_OK;
}
NS_IMETHODIMP
HTMLSelectElement::WillRemoveOptions(nsIContent* aParent, int32_t aContentIndex,
bool aNotify) {
if (this != aParent && this != aParent->GetParent()) {
return NS_OK;
}
int32_t level = this == aParent ? 0 : 1;
// Get the index where the options will be removed
nsIContent* currentKid = aParent->GetChildAt_Deprecated(aContentIndex);
if (currentKid) {
int32_t ind;
if (!mNonOptionChildren) {
// If there are no artifacts, aContentIndex == ind
ind = aContentIndex;
} else {
// If there are artifacts, we have to get the index of the option the
// hard way
ind = GetFirstOptionIndex(currentKid);
}
if (ind != -1) {
nsresult rv = RemoveOptionsFromList(currentKid, ind, level, aNotify);
NS_ENSURE_SUCCESS(rv, rv);
}
}
return NS_OK;
}
int32_t HTMLSelectElement::GetOptionIndexAt(nsIContent* aOptions) {
// Search this node and below.
// If not found, find the first one *after* this node.
int32_t retval = GetFirstOptionIndex(aOptions);
if (retval == -1) {
retval = GetOptionIndexAfter(aOptions);
}
return retval;
}
int32_t HTMLSelectElement::GetOptionIndexAfter(nsIContent* aOptions) {
// - If this is the select, the next option is the last.
// - If not, search all the options after aOptions and up to the last option
// in the parent.
// - If it's not there, search for the first option after the parent.
if (aOptions == this) {
return Length();
}
int32_t retval = -1;
nsCOMPtr<nsIContent> parent = aOptions->GetParent();
if (parent) {
int32_t index = parent->ComputeIndexOf(aOptions);
int32_t count = parent->GetChildCount();
retval = GetFirstChildOptionIndex(parent, index + 1, count);
if (retval == -1) {
retval = GetOptionIndexAfter(parent);
}
}
return retval;
}
int32_t HTMLSelectElement::GetFirstOptionIndex(nsIContent* aOptions) {
int32_t listIndex = -1;
HTMLOptionElement* optElement = HTMLOptionElement::FromNode(aOptions);
if (optElement) {
mOptions->GetOptionIndex(optElement, 0, true, &listIndex);
return listIndex;
}
listIndex = GetFirstChildOptionIndex(aOptions, 0, aOptions->GetChildCount());
return listIndex;
}
int32_t HTMLSelectElement::GetFirstChildOptionIndex(nsIContent* aOptions,
int32_t aStartIndex,
int32_t aEndIndex) {
int32_t retval = -1;
for (int32_t i = aStartIndex; i < aEndIndex; ++i) {
retval = GetFirstOptionIndex(aOptions->GetChildAt_Deprecated(i));
if (retval != -1) {
break;
}
}
return retval;
}
nsISelectControlFrame* HTMLSelectElement::GetSelectFrame() {
nsIFormControlFrame* form_control_frame = GetFormControlFrame(false);
nsISelectControlFrame* select_frame = nullptr;
if (form_control_frame) {
select_frame = do_QueryFrame(form_control_frame);
}
return select_frame;
}
void HTMLSelectElement::Add(
const HTMLOptionElementOrHTMLOptGroupElement& aElement,
const Nullable<HTMLElementOrLong>& aBefore, ErrorResult& aRv) {
nsGenericHTMLElement& element =
aElement.IsHTMLOptionElement() ? static_cast<nsGenericHTMLElement&>(
aElement.GetAsHTMLOptionElement())
: static_cast<nsGenericHTMLElement&>(
aElement.GetAsHTMLOptGroupElement());
if (aBefore.IsNull()) {
Add(element, static_cast<nsGenericHTMLElement*>(nullptr), aRv);
} else if (aBefore.Value().IsHTMLElement()) {
Add(element, &aBefore.Value().GetAsHTMLElement(), aRv);
} else {
Add(element, aBefore.Value().GetAsLong(), aRv);
}
}
void HTMLSelectElement::Add(nsGenericHTMLElement& aElement,
nsGenericHTMLElement* aBefore,
ErrorResult& aError) {
if (!aBefore) {
Element::AppendChild(aElement, aError);
return;
}
// Just in case we're not the parent, get the parent of the reference
// element
nsCOMPtr<nsINode> parent = aBefore->Element::GetParentNode();
if (!parent || !nsContentUtils::ContentIsDescendantOf(parent, this)) {
// NOT_FOUND_ERR: Raised if before is not a descendant of the SELECT
// element.
aError.Throw(NS_ERROR_DOM_NOT_FOUND_ERR);
return;
}
// If the before parameter is not null, we are equivalent to the
// insertBefore method on the parent of before.
nsCOMPtr<nsINode> refNode = aBefore;
parent->InsertBefore(aElement, refNode, aError);
}
void HTMLSelectElement::Remove(int32_t aIndex) {
if (aIndex < 0) {
return;
}
nsCOMPtr<nsINode> option = Item(static_cast<uint32_t>(aIndex));
if (!option) {
return;
}
option->Remove();
}
void HTMLSelectElement::GetType(nsAString& aType) {
if (HasAttr(kNameSpaceID_None, nsGkAtoms::multiple)) {
aType.AssignLiteral("select-multiple");
} else {
aType.AssignLiteral("select-one");
}
}
#define MAX_DYNAMIC_SELECT_LENGTH 10000
void HTMLSelectElement::SetLength(uint32_t aLength, ErrorResult& aRv) {
uint32_t curlen = Length();
if (curlen > aLength) { // Remove extra options
for (uint32_t i = curlen; i > aLength; --i) {
Remove(i - 1);
}
} else if (aLength > curlen) {
if (aLength > MAX_DYNAMIC_SELECT_LENGTH) {
aRv.Throw(NS_ERROR_DOM_NOT_SUPPORTED_ERR);
return;
}
RefPtr<mozilla::dom::NodeInfo> nodeInfo;
nsContentUtils::QNameChanged(mNodeInfo, nsGkAtoms::option,
getter_AddRefs(nodeInfo));
nsCOMPtr<nsINode> node = NS_NewHTMLOptionElement(nodeInfo.forget());
for (uint32_t i = curlen; i < aLength; i++) {
nsINode::AppendChild(*node, aRv);
if (aRv.Failed()) {
return;
}
if (i + 1 < aLength) {
node = node->CloneNode(true, aRv);
if (aRv.Failed()) {
return;
}
MOZ_ASSERT(node);
}
}
}
}
/* static */
bool HTMLSelectElement::MatchSelectedOptions(Element* aElement,
int32_t /* unused */,
nsAtom* /* unused */,
void* /* unused*/) {
HTMLOptionElement* option = HTMLOptionElement::FromNode(aElement);
return option && option->Selected();
}
nsIHTMLCollection* HTMLSelectElement::SelectedOptions() {
if (!mSelectedOptions) {
mSelectedOptions = new nsContentList(this, MatchSelectedOptions, nullptr,
nullptr, /* deep */ true);
}
return mSelectedOptions;
}
void HTMLSelectElement::SetSelectedIndexInternal(int32_t aIndex, bool aNotify) {
int32_t oldSelectedIndex = mSelectedIndex;
uint32_t mask = IS_SELECTED | CLEAR_ALL | SET_DISABLED;
if (aNotify) {
mask |= NOTIFY;
}
SetOptionsSelectedByIndex(aIndex, aIndex, mask);
nsISelectControlFrame* selectFrame = GetSelectFrame();
if (selectFrame) {
selectFrame->OnSetSelectedIndex(oldSelectedIndex, mSelectedIndex);
}
SetSelectionChanged(true, aNotify);
}
bool HTMLSelectElement::IsOptionSelectedByIndex(int32_t aIndex) {
HTMLOptionElement* option = Item(static_cast<uint32_t>(aIndex));
return option && option->Selected();
}
void HTMLSelectElement::OnOptionSelected(nsISelectControlFrame* aSelectFrame,
int32_t aIndex, bool aSelected,
bool aChangeOptionState,
bool aNotify) {
// Set the selected index
if (aSelected && (aIndex < mSelectedIndex || mSelectedIndex < 0)) {
mSelectedIndex = aIndex;
SetSelectionChanged(true, aNotify);
} else if (!aSelected && aIndex == mSelectedIndex) {
FindSelectedIndex(aIndex + 1, aNotify);
}
if (aChangeOptionState) {
// Tell the option to get its bad self selected
RefPtr<HTMLOptionElement> option = Item(static_cast<uint32_t>(aIndex));
if (option) {
option->SetSelectedInternal(aSelected, aNotify);
}
}
// Let the frame know too
if (aSelectFrame) {
aSelectFrame->OnOptionSelected(aIndex, aSelected);
}
UpdateSelectedOptions();
UpdateValueMissingValidityState();
UpdateState(aNotify);
}
void HTMLSelectElement::FindSelectedIndex(int32_t aStartIndex, bool aNotify) {
mSelectedIndex = -1;
SetSelectionChanged(true, aNotify);
uint32_t len = Length();
for (int32_t i = aStartIndex; i < int32_t(len); i++) {
if (IsOptionSelectedByIndex(i)) {
mSelectedIndex = i;
SetSelectionChanged(true, aNotify);
break;
}
}
}
// XXX Consider splitting this into two functions for ease of reading:
// SelectOptionsByIndex(startIndex, endIndex, clearAll, checkDisabled)
// startIndex, endIndex - the range of options to turn on
// (-1, -1) will clear all indices no matter what.
// clearAll - will clear all other options unless checkDisabled is on
// and all the options attempted to be set are disabled
// (note that if it is not multiple, and an option is selected,
// everything else will be cleared regardless).
// checkDisabled - if this is TRUE, and an option is disabled, it will not be
// changed regardless of whether it is selected or not.
// Generally the UI passes TRUE and JS passes FALSE.
// (setDisabled currently is the opposite)
// DeselectOptionsByIndex(startIndex, endIndex, checkDisabled)
// startIndex, endIndex - the range of options to turn on
// (-1, -1) will clear all indices no matter what.
// checkDisabled - if this is TRUE, and an option is disabled, it will not be
// changed regardless of whether it is selected or not.
// Generally the UI passes TRUE and JS passes FALSE.
// (setDisabled currently is the opposite)
//
// XXXbz the above comment is pretty confusing. Maybe we should actually
// document the args to this function too, in addition to documenting what
// things might end up looking like? In particular, pay attention to the
// setDisabled vs checkDisabled business.
bool HTMLSelectElement::SetOptionsSelectedByIndex(int32_t aStartIndex,
int32_t aEndIndex,
uint32_t aOptionsMask) {
#if 0
printf("SetOption(%d-%d, %c, ClearAll=%c)\n", aStartIndex, aEndIndex,
(aOptionsMask & IS_SELECTED ? 'Y' : 'N'),
(aOptionsMask & CLEAR_ALL ? 'Y' : 'N'));
#endif
// Don't bother if the select is disabled
if (!(aOptionsMask & SET_DISABLED) && IsDisabled()) {
return false;
}
// Don't bother if there are no options
uint32_t numItems = Length();
if (numItems == 0) {
return false;
}
// First, find out whether multiple items can be selected
bool isMultiple = Multiple();
// These variables tell us whether any options were selected
// or deselected.
bool optionsSelected = false;
bool optionsDeselected = false;
nsISelectControlFrame* selectFrame = nullptr;
bool didGetFrame = false;
AutoWeakFrame weakSelectFrame;
if (aOptionsMask & IS_SELECTED) {
// Setting selectedIndex to an out-of-bounds index means -1. (HTML5)
if (aStartIndex < 0 || AssertedCast<uint32_t>(aStartIndex) >= numItems ||
aEndIndex < 0 || AssertedCast<uint32_t>(aEndIndex) >= numItems) {
aStartIndex = -1;
aEndIndex = -1;
}
// Only select the first value if it's not multiple
if (!isMultiple) {
aEndIndex = aStartIndex;
}
// This variable tells whether or not all of the options we attempted to
// select are disabled. If ClearAll is passed in as true, and we do not
// select anything because the options are disabled, we will not clear the
// other options. (This is to make the UI work the way one might expect.)
bool allDisabled = !(aOptionsMask & SET_DISABLED);
//
// Save a little time when clearing other options
//
int32_t previousSelectedIndex = mSelectedIndex;
//
// Select the requested indices
//
// If index is -1, everything will be deselected (bug 28143)
if (aStartIndex != -1) {
MOZ_ASSERT(aStartIndex >= 0);
MOZ_ASSERT(aEndIndex >= 0);
// Loop through the options and select them (if they are not disabled and
// if they are not already selected).
for (uint32_t optIndex = AssertedCast<uint32_t>(aStartIndex);
optIndex <= AssertedCast<uint32_t>(aEndIndex); optIndex++) {
RefPtr<HTMLOptionElement> option = Item(optIndex);
// Ignore disabled options.
if (!(aOptionsMask & SET_DISABLED)) {
if (option && IsOptionDisabled(option)) {
continue;
}
allDisabled = false;
}
// If the index is already selected, ignore it.
if (option && !option->Selected()) {
// To notify the frame if anything gets changed. No need
// to flush here, if there's no frame yet we don't need to
// force it to be created just to notify it about a change
// in the select.
selectFrame = GetSelectFrame();
weakSelectFrame = do_QueryFrame(selectFrame);
didGetFrame = true;
OnOptionSelected(selectFrame, optIndex, true, true,
aOptionsMask & NOTIFY);
optionsSelected = true;
}
}
}
// Next remove all other options if single select or all is clear
// If index is -1, everything will be deselected (bug 28143)
if (((!isMultiple && optionsSelected) ||
((aOptionsMask & CLEAR_ALL) && !allDisabled) || aStartIndex == -1) &&
previousSelectedIndex != -1) {
for (uint32_t optIndex = AssertedCast<uint32_t>(previousSelectedIndex);
optIndex < numItems; optIndex++) {
if (static_cast<int32_t>(optIndex) < aStartIndex ||
static_cast<int32_t>(optIndex) > aEndIndex) {
HTMLOptionElement* option = Item(optIndex);
// If the index is already selected, ignore it.
if (option && option->Selected()) {
if (!didGetFrame || (selectFrame && !weakSelectFrame.IsAlive())) {
// To notify the frame if anything gets changed, don't
// flush, if the frame doesn't exist we don't need to
// create it just to tell it about this change.
selectFrame = GetSelectFrame();
weakSelectFrame = do_QueryFrame(selectFrame);
didGetFrame = true;
}
OnOptionSelected(selectFrame, optIndex, false, true,
aOptionsMask & NOTIFY);
optionsDeselected = true;
// Only need to deselect one option if not multiple
if (!isMultiple) {
break;
}
}
}
}
}
} else {
// If we're deselecting, loop through all selected items and deselect
// any that are in the specified range.
for (int32_t optIndex = aStartIndex; optIndex <= aEndIndex; optIndex++) {
HTMLOptionElement* option = Item(optIndex);
if (!(aOptionsMask & SET_DISABLED) && IsOptionDisabled(option)) {
continue;
}
// If the index is already selected, ignore it.
if (option && option->Selected()) {
if (!didGetFrame || (selectFrame && !weakSelectFrame.IsAlive())) {
// To notify the frame if anything gets changed, don't
// flush, if the frame doesn't exist we don't need to
// create it just to tell it about this change.
selectFrame = GetSelectFrame();
weakSelectFrame = do_QueryFrame(selectFrame);
didGetFrame = true;
}
OnOptionSelected(selectFrame, optIndex, false, true,
aOptionsMask & NOTIFY);
optionsDeselected = true;
}
}
}
// Make sure something is selected unless we were set to -1 (none)
if (optionsDeselected && aStartIndex != -1 && !(aOptionsMask & NO_RESELECT)) {
optionsSelected =
CheckSelectSomething(aOptionsMask & NOTIFY) || optionsSelected;
}
// Let the caller know whether anything was changed
return optionsSelected || optionsDeselected;
}
NS_IMETHODIMP
HTMLSelectElement::IsOptionDisabled(int32_t aIndex, bool* aIsDisabled) {
*aIsDisabled = false;
RefPtr<HTMLOptionElement> option = Item(aIndex);
NS_ENSURE_TRUE(option, NS_ERROR_FAILURE);
*aIsDisabled = IsOptionDisabled(option);
return NS_OK;
}
bool HTMLSelectElement::IsOptionDisabled(HTMLOptionElement* aOption) const {
MOZ_ASSERT(aOption);
if (aOption->Disabled()) {
return true;
}
// Check for disabled optgroups
// If there are no artifacts, there are no optgroups
if (mNonOptionChildren) {
for (nsCOMPtr<Element> node =
static_cast<nsINode*>(aOption)->GetParentElement();
node; node = node->GetParentElement()) {
// If we reached the select element, we're done
if (node->IsHTMLElement(nsGkAtoms::select)) {
return false;
}
RefPtr<HTMLOptGroupElement> optGroupElement =
HTMLOptGroupElement::FromNode(node);
if (!optGroupElement) {
// If you put something else between you and the optgroup, you're a
// moron and you deserve not to have optgroup disabling work.
return false;
}
if (optGroupElement->Disabled()) {
return true;
}
}
}
return false;
}
void HTMLSelectElement::GetValue(DOMString& aValue) {
int32_t selectedIndex = SelectedIndex();
if (selectedIndex < 0) {
return;
}
RefPtr<HTMLOptionElement> option = Item(static_cast<uint32_t>(selectedIndex));
if (!option) {
return;
}
option->GetValue(aValue);
}
void HTMLSelectElement::SetValue(const nsAString& aValue) {
uint32_t length = Length();
for (uint32_t i = 0; i < length; i++) {
RefPtr<HTMLOptionElement> option = Item(i);
if (!option) {
continue;
}
nsAutoString optionVal;
option->GetValue(optionVal);
if (optionVal.Equals(aValue)) {
SetSelectedIndexInternal(int32_t(i), true);
return;
}
}
// No matching option was found.
SetSelectedIndexInternal(-1, true);
}
int32_t HTMLSelectElement::TabIndexDefault() { return 0; }
bool HTMLSelectElement::IsHTMLFocusable(bool aWithMouse, bool* aIsFocusable,
int32_t* aTabIndex) {
if (nsGenericHTMLFormElementWithState::IsHTMLFocusable(
aWithMouse, aIsFocusable, aTabIndex)) {
return true;
}
*aIsFocusable = !IsDisabled();
return false;
}
bool HTMLSelectElement::CheckSelectSomething(bool aNotify) {
if (mIsDoneAddingChildren) {
if (mSelectedIndex < 0 && IsCombobox()) {
return SelectSomething(aNotify);
}
}
return false;
}
bool HTMLSelectElement::SelectSomething(bool aNotify) {
// If we're not done building the select, don't play with this yet.
if (!mIsDoneAddingChildren) {
return false;
}
uint32_t count = Length();
for (uint32_t i = 0; i < count; i++) {
bool disabled;
nsresult rv = IsOptionDisabled(i, &disabled);
if (NS_FAILED(rv) || !disabled) {
SetSelectedIndexInternal(i, aNotify);
UpdateValueMissingValidityState();
UpdateState(aNotify);
return true;
}
}
return false;
}
nsresult HTMLSelectElement::BindToTree(Document* aDocument, nsIContent* aParent,
nsIContent* aBindingParent) {
nsresult rv = nsGenericHTMLFormElementWithState::BindToTree(
aDocument, aParent, aBindingParent);
NS_ENSURE_SUCCESS(rv, rv);
// If there is a disabled fieldset in the parent chain, the element is now
// barred from constraint validation.
// XXXbz is this still needed now that fieldset changes always call
// FieldSetDisabledChanged?
UpdateBarredFromConstraintValidation();
// And now make sure our state is up to date
UpdateState(false);
return rv;
}
void HTMLSelectElement::UnbindFromTree(bool aDeep, bool aNullParent) {
nsGenericHTMLFormElementWithState::UnbindFromTree(aDeep, aNullParent);
// We might be no longer disabled because our parent chain changed.
// XXXbz is this still needed now that fieldset changes always call
// FieldSetDisabledChanged?
UpdateBarredFromConstraintValidation();
// And now make sure our state is up to date
UpdateState(false);
}
nsresult HTMLSelectElement::BeforeSetAttr(int32_t aNameSpaceID, nsAtom* aName,
const nsAttrValueOrString* aValue,
bool aNotify) {
if (aNameSpaceID == kNameSpaceID_None) {
if (aName == nsGkAtoms::disabled) {
if (aNotify) {
mDisabledChanged = true;
}
} else if (aName == nsGkAtoms::multiple) {
if (!aValue && aNotify && mSelectedIndex >= 0) {
// We're changing from being a multi-select to a single-select.
// Make sure we only have one option selected before we do that.
// Note that this needs to come before we really unset the attr,
// since SetOptionsSelectedByIndex does some bail-out type
// optimization for cases when the select is not multiple that
// would lead to only a single option getting deselected.
SetSelectedIndexInternal(mSelectedIndex, aNotify);
}
}
}
return nsGenericHTMLFormElementWithState::BeforeSetAttr(aNameSpaceID, aName,
aValue, aNotify);
}
nsresult HTMLSelectElement::AfterSetAttr(int32_t aNameSpaceID, nsAtom* aName,
const nsAttrValue* aValue,
const nsAttrValue* aOldValue,
nsIPrincipal* aSubjectPrincipal,
bool aNotify) {
if (aNameSpaceID == kNameSpaceID_None) {
if (aName == nsGkAtoms::disabled) {
// This *has* to be called *before* validity state check because
// UpdateBarredFromConstraintValidation and
// UpdateValueMissingValidityState depend on our disabled state.
UpdateDisabledState(aNotify);
UpdateValueMissingValidityState();
UpdateBarredFromConstraintValidation();
} else if (aName == nsGkAtoms::required) {
// This *has* to be called *before* UpdateValueMissingValidityState
// because UpdateValueMissingValidityState depends on our required
// state.
UpdateRequiredState(!!aValue, aNotify);
UpdateValueMissingValidityState();
} else if (aName == nsGkAtoms::autocomplete) {
// Clear the cached @autocomplete attribute and autocompleteInfo state.
mAutocompleteAttrState = nsContentUtils::eAutocompleteAttrState_Unknown;
mAutocompleteInfoState = nsContentUtils::eAutocompleteAttrState_Unknown;
} else if (aName == nsGkAtoms::multiple) {
if (!aValue && aNotify) {
// We might have become a combobox; make sure _something_ gets
// selected in that case
CheckSelectSomething(aNotify);
}
}
}
return nsGenericHTMLFormElementWithState::AfterSetAttr(
aNameSpaceID, aName, aValue, aOldValue, aSubjectPrincipal, aNotify);
}
void HTMLSelectElement::DoneAddingChildren(bool aHaveNotified) {
mIsDoneAddingChildren = true;
nsISelectControlFrame* selectFrame = GetSelectFrame();
// If we foolishly tried to restore before we were done adding
// content, restore the rest of the options proper-like
if (mRestoreState) {
RestoreStateTo(*mRestoreState);
mRestoreState = nullptr;
}
// Notify the frame
if (selectFrame) {
selectFrame->DoneAddingChildren(true);
}
if (!mInhibitStateRestoration) {
nsresult rv = GenerateStateKey();
if (NS_SUCCEEDED(rv)) {
RestoreFormControlState();
}
}
// Now that we're done, select something (if it's a single select something
// must be selected)
if (!CheckSelectSomething(false)) {
// If an option has @selected set, it will be selected during parsing but
// with an empty value. We have to make sure the select element updates it's
// validity state to take this into account.
UpdateValueMissingValidityState();
// And now make sure we update our content state too
UpdateState(aHaveNotified);
}
mDefaultSelectionSet = true;
}
bool HTMLSelectElement::ParseAttribute(int32_t aNamespaceID, nsAtom* aAttribute,
const nsAString& aValue,
nsIPrincipal* aMaybeScriptedPrincipal,
nsAttrValue& aResult) {
if (kNameSpaceID_None == aNamespaceID) {
if (aAttribute == nsGkAtoms::size) {
return aResult.ParsePositiveIntValue(aValue);
} else if (aAttribute == nsGkAtoms::autocomplete) {
aResult.ParseAtomArray(aValue);
return true;
}
}
return nsGenericHTMLElement::ParseAttribute(aNamespaceID, aAttribute, aValue,
aMaybeScriptedPrincipal, aResult);
}
void HTMLSelectElement::MapAttributesIntoRule(
const nsMappedAttributes* aAttributes, MappedDeclarations& aDecls) {
nsGenericHTMLFormElementWithState::MapImageAlignAttributeInto(aAttributes,
aDecls);
nsGenericHTMLFormElementWithState::MapCommonAttributesInto(aAttributes,
aDecls);
}
nsChangeHint HTMLSelectElement::GetAttributeChangeHint(const nsAtom* aAttribute,
int32_t aModType) const {
nsChangeHint retval =
nsGenericHTMLFormElementWithState::GetAttributeChangeHint(aAttribute,
aModType);
if (aAttribute == nsGkAtoms::multiple || aAttribute == nsGkAtoms::size) {
retval |= nsChangeHint_ReconstructFrame;
}
return retval;
}
NS_IMETHODIMP_(bool)
HTMLSelectElement::IsAttributeMapped(const nsAtom* aAttribute) const {
static const MappedAttributeEntry* const map[] = {sCommonAttributeMap,
sImageAlignAttributeMap};
return FindAttributeDependence(aAttribute, map);
}
nsMapRuleToAttributesFunc HTMLSelectElement::GetAttributeMappingFunction()
const {
return &MapAttributesIntoRule;
}
bool HTMLSelectElement::IsDisabledForEvents(WidgetEvent* aEvent) {
nsIFormControlFrame* formControlFrame = GetFormControlFrame(false);
nsIFrame* formFrame = nullptr;
if (formControlFrame) {
formFrame = do_QueryFrame(formControlFrame);
}
return IsElementDisabledForEvents(aEvent, formFrame);
}
void HTMLSelectElement::GetEventTargetParent(EventChainPreVisitor& aVisitor) {
aVisitor.mCanHandle = false;
if (IsDisabledForEvents(aVisitor.mEvent)) {
return;
}
nsGenericHTMLFormElementWithState::GetEventTargetParent(aVisitor);
}
nsresult HTMLSelectElement::PostHandleEvent(EventChainPostVisitor& aVisitor) {
if (aVisitor.mEvent->mMessage == eFocus) {
// If the invalid UI is shown, we should show it while focused and
// update the invalid/valid UI.
mCanShowInvalidUI = !IsValid() && ShouldShowValidityUI();
// If neither invalid UI nor valid UI is shown, we shouldn't show the valid
// UI while focused.
mCanShowValidUI = ShouldShowValidityUI();
// We don't have to update NS_EVENT_STATE_MOZ_UI_INVALID nor
// NS_EVENT_STATE_MOZ_UI_VALID given that the states should not change.
} else if (aVisitor.mEvent->mMessage == eBlur) {
mCanShowInvalidUI = true;
mCanShowValidUI = true;
UpdateState(true);
}
return nsGenericHTMLFormElementWithState::PostHandleEvent(aVisitor);
}
EventStates HTMLSelectElement::IntrinsicState() const {
EventStates state = nsGenericHTMLFormElementWithState::IntrinsicState();
if (IsCandidateForConstraintValidation()) {
if (IsValid()) {
state |= NS_EVENT_STATE_VALID;
} else {
state |= NS_EVENT_STATE_INVALID;
if ((!mForm ||
!mForm->HasAttr(kNameSpaceID_None, nsGkAtoms::novalidate)) &&
(GetValidityState(VALIDITY_STATE_CUSTOM_ERROR) ||
(mCanShowInvalidUI && ShouldShowValidityUI()))) {
state |= NS_EVENT_STATE_MOZ_UI_INVALID;
}
}
// :-moz-ui-valid applies if all the following are true:
// 1. The element is not focused, or had either :-moz-ui-valid or
// :-moz-ui-invalid applying before it was focused ;
// 2. The element is either valid or isn't allowed to have
// :-moz-ui-invalid applying ;
// 3. The element has no form owner or its form owner doesn't have the
// novalidate attribute set ;
// 4. The element has already been modified or the user tried to submit the
// form owner while invalid.
if ((!mForm || !mForm->HasAttr(kNameSpaceID_None, nsGkAtoms::novalidate)) &&
(mCanShowValidUI && ShouldShowValidityUI() &&
(IsValid() || (state.HasState(NS_EVENT_STATE_MOZ_UI_INVALID) &&
!mCanShowInvalidUI)))) {
state |= NS_EVENT_STATE_MOZ_UI_VALID;
}
}
return state;
}
// nsIFormControl
NS_IMETHODIMP
HTMLSelectElement::SaveState() {
PresState* presState = GetPrimaryPresState();
if (!presState) {
return NS_OK;
}
SelectContentData state;
uint32_t len = Length();
for (uint32_t optIndex = 0; optIndex < len; optIndex++) {
HTMLOptionElement* option = Item(optIndex);
if (option && option->Selected()) {
nsAutoString value;
option->GetValue(value);
if (value.IsEmpty()) {
state.indices().AppendElement(optIndex);
} else {
state.values().AppendElement(std::move(value));
}
}
}
presState->contentData() = std::move(state);
if (mDisabledChanged) {
// We do not want to save the real disabled state but the disabled
// attribute.
presState->disabled() = HasAttr(kNameSpaceID_None, nsGkAtoms::disabled);
presState->disabledSet() = true;
}
return NS_OK;
}
bool HTMLSelectElement::RestoreState(PresState* aState) {
// Get the presentation state object to retrieve our stuff out of.
const PresContentData& state = aState->contentData();
if (state.type() == PresContentData::TSelectContentData) {
RestoreStateTo(state.get_SelectContentData());
// Don't flush, if the frame doesn't exist yet it doesn't care if
// we're reset or not.
DispatchContentReset();
}
if (aState->disabledSet() && !aState->disabled()) {
SetDisabled(false, IgnoreErrors());
}
return false;
}
void HTMLSelectElement::RestoreStateTo(const SelectContentData& aNewSelected) {
if (!mIsDoneAddingChildren) {
// Make a copy of the state for us to restore from in the future.
mRestoreState = MakeUnique<SelectContentData>(aNewSelected);
return;
}
uint32_t len = Length();
uint32_t mask = IS_SELECTED | CLEAR_ALL | SET_DISABLED | NOTIFY;
// First clear all
SetOptionsSelectedByIndex(-1, -1, mask);
// Select by index.
for (uint32_t idx : aNewSelected.indices()) {
if (idx < len) {
SetOptionsSelectedByIndex(idx, idx, IS_SELECTED | SET_DISABLED | NOTIFY);
}
}
// Select by value.
for (uint32_t i = 0; i < len; ++i) {
HTMLOptionElement* option = Item(i);
if (option) {
nsAutoString value;
option->GetValue(value);
if (aNewSelected.values().Contains(value)) {
SetOptionsSelectedByIndex(i, i, IS_SELECTED | SET_DISABLED | NOTIFY);
}
}
}
}
NS_IMETHODIMP
HTMLSelectElement::Reset() {
uint32_t numSelected = 0;
//
// Cycle through the options array and reset the options
//
uint32_t numOptions = Length();
for (uint32_t i = 0; i < numOptions; i++) {
RefPtr<HTMLOptionElement> option = Item(i);
if (option) {
//
// Reset the option to its default value
//
uint32_t mask = SET_DISABLED | NOTIFY | NO_RESELECT;
if (option->DefaultSelected()) {
mask |= IS_SELECTED;
numSelected++;
}
SetOptionsSelectedByIndex(i, i, mask);
option->SetSelectedChanged(false);
}
}
//
// If nothing was selected and it's not multiple, select something
//
if (numSelected == 0 && IsCombobox()) {
SelectSomething(true);
}
SetSelectionChanged(false, true);
//
// Let the frame know we were reset
//
// Don't flush, if there's no frame yet it won't care about us being
// reset even if we forced it to be created now.
//
DispatchContentReset();
return NS_OK;
}
static NS_DEFINE_CID(kFormProcessorCID, NS_FORMPROCESSOR_CID);
NS_IMETHODIMP
HTMLSelectElement::SubmitNamesValues(HTMLFormSubmission* aFormSubmission) {
// Disabled elements don't submit
if (IsDisabled()) {
return NS_OK;
}
//
// Get the name (if no name, no submit)
//
nsAutoString name;
GetAttr(kNameSpaceID_None, nsGkAtoms::name, name);
if (name.IsEmpty()) {
return NS_OK;
}
//
// Submit
//
uint32_t len = Length();
nsAutoString mozType;
nsCOMPtr<nsIFormProcessor> keyGenProcessor;
if (GetAttr(kNameSpaceID_None, nsGkAtoms::moztype, mozType) &&
mozType.EqualsLiteral("-mozilla-keygen")) {
keyGenProcessor = do_GetService(kFormProcessorCID);
}
for (uint32_t optIndex = 0; optIndex < len; optIndex++) {
HTMLOptionElement* option = Item(optIndex);
// Don't send disabled options
if (!option || IsOptionDisabled(option)) {
continue;
}
if (!option->Selected()) {
continue;
}
nsString value;
option->GetValue(value);
if (keyGenProcessor) {
nsString tmp(value);
if (NS_SUCCEEDED(keyGenProcessor->ProcessValue(this, name, tmp))) {
value = tmp;
}
}
aFormSubmission->AddNameValuePair(name, value);
}
return NS_OK;
}
void HTMLSelectElement::DispatchContentReset() {
nsIFormControlFrame* formControlFrame = GetFormControlFrame(false);
if (formControlFrame) {
// Only dispatch content reset notification if this is a list control
// frame or combo box control frame.
if (IsCombobox()) {
nsComboboxControlFrame* comboFrame = do_QueryFrame(formControlFrame);
if (comboFrame) {
comboFrame->OnContentReset();
}
} else {
nsListControlFrame* listFrame = do_QueryFrame(formControlFrame);
if (listFrame) {
listFrame->OnContentReset();
}
}
}
}
static void AddOptions(nsIContent* aRoot, HTMLOptionsCollection* aArray) {
for (nsIContent* child = aRoot->GetFirstChild(); child;
child = child->GetNextSibling()) {
HTMLOptionElement* opt = HTMLOptionElement::FromNode(child);
if (opt) {
aArray->AppendOption(opt);
} else if (child->IsHTMLElement(nsGkAtoms::optgroup)) {
for (nsIContent* grandchild = child->GetFirstChild(); grandchild;
grandchild = grandchild->GetNextSibling()) {
opt = HTMLOptionElement::FromNode(grandchild);
if (opt) {
aArray->AppendOption(opt);
}
}
}
}
}
void HTMLSelectElement::RebuildOptionsArray(bool aNotify) {
mOptions->Clear();
AddOptions(this, mOptions);
FindSelectedIndex(0, aNotify);
}
bool HTMLSelectElement::IsValueMissing() const {
if (!Required()) {
return false;
}
uint32_t length = Length();
for (uint32_t i = 0; i < length; ++i) {
RefPtr<HTMLOptionElement> option = Item(i);
// Check for a placeholder label option, don't count it as a valid value.
if (i == 0 && !Multiple() && Size() <= 1 && option->GetParent() == this) {
nsAutoString value;
option->GetValue(value);
if (value.IsEmpty()) {
continue;
}
}
if (!option->Selected()) {
continue;
}
if (IsOptionDisabled(option)) {
continue;
}
return false;
}
return true;
}
void HTMLSelectElement::UpdateValueMissingValidityState() {
SetValidityState(VALIDITY_STATE_VALUE_MISSING, IsValueMissing());
}
nsresult HTMLSelectElement::GetValidationMessage(nsAString& aValidationMessage,
ValidityStateType aType) {
switch (aType) {
case VALIDITY_STATE_VALUE_MISSING: {
nsAutoString message;
nsresult rv = nsContentUtils::GetLocalizedString(
nsContentUtils::eDOM_PROPERTIES, "FormValidationSelectMissing",
message);
aValidationMessage = message;
return rv;
}
default: {
return nsIConstraintValidation::GetValidationMessage(aValidationMessage,
aType);
}
}
}
#ifdef DEBUG
void HTMLSelectElement::VerifyOptionsArray() {
int32_t index = 0;
for (nsIContent* child = nsINode::GetFirstChild(); child;
child = child->GetNextSibling()) {
HTMLOptionElement* opt = HTMLOptionElement::FromNode(child);
if (opt) {
NS_ASSERTION(opt == mOptions->ItemAsOption(index++),
"Options collection broken");
} else if (child->IsHTMLElement(nsGkAtoms::optgroup)) {
for (nsIContent* grandchild = child->GetFirstChild(); grandchild;
grandchild = grandchild->GetNextSibling()) {
opt = HTMLOptionElement::FromNode(grandchild);
if (opt) {
NS_ASSERTION(opt == mOptions->ItemAsOption(index++),
"Options collection broken");
}
}
}
}
}
#endif
void HTMLSelectElement::UpdateBarredFromConstraintValidation() {
SetBarredFromConstraintValidation(IsDisabled());
}
void HTMLSelectElement::FieldSetDisabledChanged(bool aNotify) {
// This *has* to be called before UpdateBarredFromConstraintValidation and
// UpdateValueMissingValidityState because these two functions depend on our
// disabled state.
nsGenericHTMLFormElementWithState::FieldSetDisabledChanged(aNotify);
UpdateValueMissingValidityState();
UpdateBarredFromConstraintValidation();
UpdateState(aNotify);
}
void HTMLSelectElement::SetSelectionChanged(bool aValue, bool aNotify) {
if (!mDefaultSelectionSet) {
return;
}
UpdateSelectedOptions();
bool previousSelectionChangedValue = mSelectionHasChanged;
mSelectionHasChanged = aValue;
if (mSelectionHasChanged != previousSelectionChangedValue) {
UpdateState(aNotify);
}
}
void HTMLSelectElement::UpdateSelectedOptions() {
if (mSelectedOptions) {
mSelectedOptions->SetDirty();
}
}
bool HTMLSelectElement::OpenInParentProcess() {
nsIFormControlFrame* formControlFrame = GetFormControlFrame(false);
nsComboboxControlFrame* comboFrame = do_QueryFrame(formControlFrame);
if (comboFrame) {
return comboFrame->IsOpenInParentProcess();
}
return false;
}
void HTMLSelectElement::SetOpenInParentProcess(bool aVal) {
nsIFormControlFrame* formControlFrame = GetFormControlFrame(false);
nsComboboxControlFrame* comboFrame = do_QueryFrame(formControlFrame);
if (comboFrame) {
comboFrame->SetOpenInParentProcess(aVal);
}
}
void HTMLSelectElement::SetPreviewValue(const nsAString& aValue) {
mPreviewValue = aValue;
nsContentUtils::RemoveNewlines(mPreviewValue);
nsIFormControlFrame* formControlFrame = GetFormControlFrame(false);
nsComboboxControlFrame* comboFrame = do_QueryFrame(formControlFrame);
if (comboFrame) {
comboFrame->RedisplaySelectedText();
}
}
JSObject* HTMLSelectElement::WrapNode(JSContext* aCx,
JS::Handle<JSObject*> aGivenProto) {
return HTMLSelectElement_Binding::Wrap(aCx, this, aGivenProto);
}
} // namespace dom
} // namespace mozilla
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