gecko-dev/dom/html/HTMLOptionElement.cpp

459 строки
13 KiB
C++

/* -*- 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/HTMLOptionElement.h"
#include "mozilla/dom/HTMLOptionElementBinding.h"
#include "mozilla/dom/HTMLSelectElement.h"
#include "nsIDOMHTMLOptGroupElement.h"
#include "nsIDOMHTMLFormElement.h"
#include "nsGkAtoms.h"
#include "nsStyleConsts.h"
#include "nsIFormControl.h"
#include "nsIForm.h"
#include "nsIDOMNode.h"
#include "nsIDOMHTMLCollection.h"
#include "nsISelectControlFrame.h"
// Notify/query select frame for selected state
#include "nsIFormControlFrame.h"
#include "nsIDocument.h"
#include "nsIDOMHTMLSelectElement.h"
#include "nsNodeInfoManager.h"
#include "nsCOMPtr.h"
#include "mozilla/EventStates.h"
#include "nsContentCreatorFunctions.h"
#include "mozAutoDocUpdate.h"
#include "nsTextNode.h"
/**
* Implementation of <option>
*/
NS_IMPL_NS_NEW_HTML_ELEMENT(Option)
namespace mozilla {
namespace dom {
HTMLOptionElement::HTMLOptionElement(already_AddRefed<mozilla::dom::NodeInfo>& aNodeInfo)
: nsGenericHTMLElement(aNodeInfo),
mSelectedChanged(false),
mIsSelected(false),
mIsInSetDefaultSelected(false)
{
// We start off enabled
AddStatesSilently(NS_EVENT_STATE_ENABLED);
}
HTMLOptionElement::~HTMLOptionElement()
{
}
NS_IMPL_ISUPPORTS_INHERITED(HTMLOptionElement, nsGenericHTMLElement,
nsIDOMHTMLOptionElement)
NS_IMPL_ELEMENT_CLONE(HTMLOptionElement)
NS_IMETHODIMP
HTMLOptionElement::GetForm(nsIDOMHTMLFormElement** aForm)
{
NS_IF_ADDREF(*aForm = GetForm());
return NS_OK;
}
mozilla::dom::HTMLFormElement*
HTMLOptionElement::GetForm()
{
HTMLSelectElement* selectControl = GetSelect();
return selectControl ? selectControl->GetForm() : nullptr;
}
void
HTMLOptionElement::SetSelectedInternal(bool aValue, bool aNotify)
{
mSelectedChanged = true;
mIsSelected = aValue;
// When mIsInSetDefaultSelected is true, the state change will be handled by
// SetAttr/UnsetAttr.
if (!mIsInSetDefaultSelected) {
UpdateState(aNotify);
}
}
NS_IMETHODIMP
HTMLOptionElement::GetSelected(bool* aValue)
{
NS_ENSURE_ARG_POINTER(aValue);
*aValue = Selected();
return NS_OK;
}
NS_IMETHODIMP
HTMLOptionElement::SetSelected(bool aValue)
{
// Note: The select content obj maintains all the PresState
// so defer to it to get the answer
HTMLSelectElement* selectInt = GetSelect();
if (selectInt) {
int32_t index = Index();
uint32_t mask = HTMLSelectElement::SET_DISABLED | HTMLSelectElement::NOTIFY;
if (aValue) {
mask |= HTMLSelectElement::IS_SELECTED;
}
// This should end up calling SetSelectedInternal
selectInt->SetOptionsSelectedByIndex(index, index, mask);
} else {
SetSelectedInternal(aValue, true);
}
return NS_OK;
}
NS_IMPL_BOOL_ATTR(HTMLOptionElement, DefaultSelected, selected)
// GetText returns a whitespace compressed .textContent value.
NS_IMPL_STRING_ATTR_WITH_FALLBACK(HTMLOptionElement, Label, label, GetText)
NS_IMPL_STRING_ATTR_WITH_FALLBACK(HTMLOptionElement, Value, value, GetText)
NS_IMPL_BOOL_ATTR(HTMLOptionElement, Disabled, disabled)
NS_IMETHODIMP
HTMLOptionElement::GetIndex(int32_t* aIndex)
{
*aIndex = Index();
return NS_OK;
}
int32_t
HTMLOptionElement::Index()
{
static int32_t defaultIndex = 0;
// Only select elements can contain a list of options.
HTMLSelectElement* selectElement = GetSelect();
if (!selectElement) {
return defaultIndex;
}
HTMLOptionsCollection* options = selectElement->GetOptions();
if (!options) {
return defaultIndex;
}
int32_t index = defaultIndex;
MOZ_ALWAYS_SUCCEEDS(options->GetOptionIndex(this, 0, true, &index));
return index;
}
bool
HTMLOptionElement::Selected() const
{
// If we haven't been explictly selected or deselected, use our default value
if (!mSelectedChanged) {
return DefaultSelected();
}
return mIsSelected;
}
bool
HTMLOptionElement::DefaultSelected() const
{
return HasAttr(kNameSpaceID_None, nsGkAtoms::selected);
}
nsChangeHint
HTMLOptionElement::GetAttributeChangeHint(const nsIAtom* aAttribute,
int32_t aModType) const
{
nsChangeHint retval =
nsGenericHTMLElement::GetAttributeChangeHint(aAttribute, aModType);
if (aAttribute == nsGkAtoms::label ||
aAttribute == nsGkAtoms::text) {
retval |= NS_STYLE_HINT_REFLOW;
}
return retval;
}
nsresult
HTMLOptionElement::BeforeSetAttr(int32_t aNamespaceID, nsIAtom* aName,
const nsAttrValueOrString* aValue,
bool aNotify)
{
nsresult rv = nsGenericHTMLElement::BeforeSetAttr(aNamespaceID, aName,
aValue, aNotify);
NS_ENSURE_SUCCESS(rv, rv);
if (aNamespaceID != kNameSpaceID_None || aName != nsGkAtoms::selected ||
mSelectedChanged) {
return NS_OK;
}
bool defaultSelected = aValue;
// First make sure we actually set our mIsSelected state to reflect our new
// defaultSelected state. If that turns out to be wrong,
// SetOptionsSelectedByIndex will fix it up. But otherwise we can end up in a
// situation where mIsSelected is still false, but mSelectedChanged becomes
// true (later in this method, when we compare mIsSelected to
// defaultSelected), and then we start returning false for Selected() even
// though we're actually selected.
mIsSelected = defaultSelected;
// We just changed out selected state (since we look at the "selected"
// attribute when mSelectedChanged is false). Let's tell our select about
// it.
HTMLSelectElement* selectInt = GetSelect();
if (!selectInt) {
return NS_OK;
}
NS_ASSERTION(!mSelectedChanged, "Shouldn't be here");
bool inSetDefaultSelected = mIsInSetDefaultSelected;
mIsInSetDefaultSelected = true;
int32_t index = Index();
uint32_t mask = HTMLSelectElement::SET_DISABLED;
if (defaultSelected) {
mask |= HTMLSelectElement::IS_SELECTED;
}
if (aNotify) {
mask |= HTMLSelectElement::NOTIFY;
}
// This can end up calling SetSelectedInternal if our selected state needs to
// change, which we will allow to take effect so that parts of
// SetOptionsSelectedByIndex that might depend on it working don't get
// confused.
selectInt->SetOptionsSelectedByIndex(index, index, mask);
// Now reset our members; when we finish the attr set we'll end up with the
// rigt selected state.
mIsInSetDefaultSelected = inSetDefaultSelected;
// mIsSelected might have been changed by SetOptionsSelectedByIndex. Possibly
// more than once; make sure our mSelectedChanged state is set correctly.
mSelectedChanged = mIsSelected != defaultSelected;
return NS_OK;
}
nsresult
HTMLOptionElement::AfterSetAttr(int32_t aNameSpaceID, nsIAtom* aName,
const nsAttrValue* aValue, bool aNotify)
{
if (aNameSpaceID == kNameSpaceID_None &&
aName == nsGkAtoms::value && Selected()) {
// Since this option is selected, changing value
// may have changed missing validity state of the
// Select element
HTMLSelectElement* select = GetSelect();
if (select) {
select->UpdateValueMissingValidityState();
}
}
return nsGenericHTMLElement::AfterSetAttr(aNameSpaceID, aName,
aValue, aNotify);
}
NS_IMETHODIMP
HTMLOptionElement::GetText(nsAString& aText)
{
nsAutoString text;
nsIContent* child = nsINode::GetFirstChild();
while (child) {
if (child->NodeType() == nsIDOMNode::TEXT_NODE ||
child->NodeType() == nsIDOMNode::CDATA_SECTION_NODE) {
child->AppendTextTo(text);
}
if (child->IsHTMLElement(nsGkAtoms::script) ||
child->IsSVGElement(nsGkAtoms::script)) {
child = child->GetNextNonChildNode(this);
} else {
child = child->GetNextNode(this);
}
}
// XXX No CompressWhitespace for nsAString. Sad.
text.CompressWhitespace(true, true);
aText = text;
return NS_OK;
}
NS_IMETHODIMP
HTMLOptionElement::SetText(const nsAString& aText)
{
return nsContentUtils::SetNodeTextContent(this, aText, true);
}
nsresult
HTMLOptionElement::BindToTree(nsIDocument* aDocument, nsIContent* aParent,
nsIContent* aBindingParent,
bool aCompileEventHandlers)
{
nsresult rv = nsGenericHTMLElement::BindToTree(aDocument, aParent,
aBindingParent,
aCompileEventHandlers);
NS_ENSURE_SUCCESS(rv, rv);
// Our new parent might change :disabled/:enabled state.
UpdateState(false);
return NS_OK;
}
void
HTMLOptionElement::UnbindFromTree(bool aDeep, bool aNullParent)
{
nsGenericHTMLElement::UnbindFromTree(aDeep, aNullParent);
// Our previous parent could have been involved in :disabled/:enabled state.
UpdateState(false);
}
EventStates
HTMLOptionElement::IntrinsicState() const
{
EventStates state = nsGenericHTMLElement::IntrinsicState();
if (Selected()) {
state |= NS_EVENT_STATE_CHECKED;
}
if (DefaultSelected()) {
state |= NS_EVENT_STATE_DEFAULT;
}
// An <option> is disabled if it has @disabled set or if it's <optgroup> has
// @disabled set.
if (HasAttr(kNameSpaceID_None, nsGkAtoms::disabled)) {
state |= NS_EVENT_STATE_DISABLED;
state &= ~NS_EVENT_STATE_ENABLED;
} else {
nsIContent* parent = GetParent();
if (parent && parent->IsHTMLElement(nsGkAtoms::optgroup) &&
parent->HasAttr(kNameSpaceID_None, nsGkAtoms::disabled)) {
state |= NS_EVENT_STATE_DISABLED;
state &= ~NS_EVENT_STATE_ENABLED;
} else {
state &= ~NS_EVENT_STATE_DISABLED;
state |= NS_EVENT_STATE_ENABLED;
}
}
return state;
}
// Get the select content element that contains this option
HTMLSelectElement*
HTMLOptionElement::GetSelect()
{
nsIContent* parent = GetParent();
if (!parent) {
return nullptr;
}
HTMLSelectElement* select = HTMLSelectElement::FromContent(parent);
if (select) {
return select;
}
if (!parent->IsHTMLElement(nsGkAtoms::optgroup)) {
return nullptr;
}
return HTMLSelectElement::FromContentOrNull(parent->GetParent());
}
already_AddRefed<HTMLOptionElement>
HTMLOptionElement::Option(const GlobalObject& aGlobal,
const Optional<nsAString>& aText,
const Optional<nsAString>& aValue,
const Optional<bool>& aDefaultSelected,
const Optional<bool>& aSelected, ErrorResult& aError)
{
nsCOMPtr<nsPIDOMWindowInner> win = do_QueryInterface(aGlobal.GetAsSupports());
nsIDocument* doc;
if (!win || !(doc = win->GetExtantDoc())) {
aError.Throw(NS_ERROR_FAILURE);
return nullptr;
}
already_AddRefed<mozilla::dom::NodeInfo> nodeInfo =
doc->NodeInfoManager()->GetNodeInfo(nsGkAtoms::option, nullptr,
kNameSpaceID_XHTML,
nsIDOMNode::ELEMENT_NODE);
RefPtr<HTMLOptionElement> option = new HTMLOptionElement(nodeInfo);
if (aText.WasPassed()) {
// Create a new text node and append it to the option
RefPtr<nsTextNode> textContent =
new nsTextNode(option->NodeInfo()->NodeInfoManager());
textContent->SetText(aText.Value(), false);
aError = option->AppendChildTo(textContent, false);
if (aError.Failed()) {
return nullptr;
}
if (aValue.WasPassed()) {
// Set the value attribute for this element. We're calling SetAttr
// directly because we want to pass aNotify == false.
aError = option->SetAttr(kNameSpaceID_None, nsGkAtoms::value,
aValue.Value(), false);
if (aError.Failed()) {
return nullptr;
}
if (aDefaultSelected.WasPassed()) {
if (aDefaultSelected.Value()) {
// We're calling SetAttr directly because we want to pass
// aNotify == false.
aError = option->SetAttr(kNameSpaceID_None, nsGkAtoms::selected,
EmptyString(), false);
if (aError.Failed()) {
return nullptr;
}
}
if (aSelected.WasPassed()) {
option->SetSelected(aSelected.Value(), aError);
if (aError.Failed()) {
return nullptr;
}
}
}
}
}
return option.forget();
}
nsresult
HTMLOptionElement::CopyInnerTo(Element* aDest)
{
nsresult rv = nsGenericHTMLElement::CopyInnerTo(aDest);
NS_ENSURE_SUCCESS(rv, rv);
if (aDest->OwnerDoc()->IsStaticDocument()) {
static_cast<HTMLOptionElement*>(aDest)->SetSelected(Selected());
}
return NS_OK;
}
JSObject*
HTMLOptionElement::WrapNode(JSContext* aCx, JS::Handle<JSObject*> aGivenProto)
{
return HTMLOptionElementBinding::Wrap(aCx, this, aGivenProto);
}
} // namespace dom
} // namespace mozilla