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-rw-r--r--dom/html/HTMLOptionElement.cpp348
1 files changed, 348 insertions, 0 deletions
diff --git a/dom/html/HTMLOptionElement.cpp b/dom/html/HTMLOptionElement.cpp
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+++ b/dom/html/HTMLOptionElement.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/HTMLOptionElement.h"
+
+#include "HTMLOptGroupElement.h"
+#include "mozilla/dom/HTMLOptionElementBinding.h"
+#include "mozilla/dom/HTMLSelectElement.h"
+#include "nsGkAtoms.h"
+#include "nsStyleConsts.h"
+#include "nsIFormControl.h"
+#include "nsISelectControlFrame.h"
+
+// Notify/query select frame for selected state
+#include "nsIFormControlFrame.h"
+#include "mozilla/dom/Document.h"
+#include "nsNodeInfoManager.h"
+#include "nsCOMPtr.h"
+#include "nsContentCreatorFunctions.h"
+#include "mozAutoDocUpdate.h"
+#include "nsTextNode.h"
+
+/**
+ * Implementation of <option>
+ */
+
+NS_IMPL_NS_NEW_HTML_ELEMENT(Option)
+
+namespace mozilla::dom {
+
+HTMLOptionElement::HTMLOptionElement(
+ already_AddRefed<mozilla::dom::NodeInfo>&& aNodeInfo)
+ : nsGenericHTMLElement(std::move(aNodeInfo)) {
+ // We start off enabled
+ AddStatesSilently(ElementState::ENABLED);
+}
+
+HTMLOptionElement::~HTMLOptionElement() = default;
+
+NS_IMPL_ELEMENT_CLONE(HTMLOptionElement)
+
+mozilla::dom::HTMLFormElement* HTMLOptionElement::GetForm() {
+ HTMLSelectElement* selectControl = GetSelect();
+ return selectControl ? selectControl->GetForm() : nullptr;
+}
+
+void HTMLOptionElement::SetSelectedInternal(bool aValue, bool aNotify) {
+ mSelectedChanged = true;
+ SetStates(ElementState::CHECKED, aValue, aNotify);
+}
+
+void HTMLOptionElement::OptGroupDisabledChanged(bool aNotify) {
+ UpdateDisabledState(aNotify);
+}
+
+void HTMLOptionElement::UpdateDisabledState(bool aNotify) {
+ bool isDisabled = HasAttr(nsGkAtoms::disabled);
+
+ if (!isDisabled) {
+ nsIContent* parent = GetParent();
+ if (auto optGroupElement = HTMLOptGroupElement::FromNodeOrNull(parent)) {
+ isDisabled = optGroupElement->IsDisabled();
+ }
+ }
+
+ ElementState disabledStates;
+ if (isDisabled) {
+ disabledStates |= ElementState::DISABLED;
+ } else {
+ disabledStates |= ElementState::ENABLED;
+ }
+
+ ElementState oldDisabledStates = State() & ElementState::DISABLED_STATES;
+ ElementState changedStates = disabledStates ^ oldDisabledStates;
+
+ if (!changedStates.IsEmpty()) {
+ ToggleStates(changedStates, aNotify);
+ }
+}
+
+void 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();
+ HTMLSelectElement::OptionFlags mask{
+ HTMLSelectElement::OptionFlag::SetDisabled,
+ HTMLSelectElement::OptionFlag::Notify};
+ if (aValue) {
+ mask += HTMLSelectElement::OptionFlag::IsSelected;
+ }
+
+ // This should end up calling SetSelectedInternal
+ selectInt->SetOptionsSelectedByIndex(index, index, mask);
+ } else {
+ SetSelectedInternal(aValue, true);
+ }
+}
+
+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;
+}
+
+nsChangeHint HTMLOptionElement::GetAttributeChangeHint(const nsAtom* aAttribute,
+ int32_t aModType) const {
+ nsChangeHint retval =
+ nsGenericHTMLElement::GetAttributeChangeHint(aAttribute, aModType);
+
+ if (aAttribute == nsGkAtoms::label) {
+ retval |= nsChangeHint_ReconstructFrame;
+ } else if (aAttribute == nsGkAtoms::text) {
+ retval |= NS_STYLE_HINT_REFLOW;
+ }
+ return retval;
+}
+
+void HTMLOptionElement::BeforeSetAttr(int32_t aNamespaceID, nsAtom* aName,
+ const nsAttrValue* aValue, bool aNotify) {
+ nsGenericHTMLElement::BeforeSetAttr(aNamespaceID, aName, aValue, aNotify);
+
+ if (aNamespaceID != kNameSpaceID_None || aName != nsGkAtoms::selected ||
+ mSelectedChanged) {
+ return;
+ }
+
+ // 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) {
+ // If option is a child of select, SetOptionsSelectedByIndex will set the
+ // selected state if needed.
+ SetStates(ElementState::CHECKED, !!aValue, aNotify);
+ return;
+ }
+
+ NS_ASSERTION(!mSelectedChanged, "Shouldn't be here");
+
+ bool inSetDefaultSelected = mIsInSetDefaultSelected;
+ mIsInSetDefaultSelected = true;
+
+ int32_t index = Index();
+ HTMLSelectElement::OptionFlags mask =
+ HTMLSelectElement::OptionFlag::SetDisabled;
+ if (aValue) {
+ mask += HTMLSelectElement::OptionFlag::IsSelected;
+ }
+
+ if (aNotify) {
+ mask += HTMLSelectElement::OptionFlag::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;
+ // the selected state might have been changed by SetOptionsSelectedByIndex,
+ // possibly more than once; make sure our mSelectedChanged state is set back
+ // correctly.
+ mSelectedChanged = false;
+}
+
+void HTMLOptionElement::AfterSetAttr(int32_t aNameSpaceID, nsAtom* aName,
+ const nsAttrValue* aValue,
+ const nsAttrValue* aOldValue,
+ nsIPrincipal* aSubjectPrincipal,
+ bool aNotify) {
+ if (aNameSpaceID == kNameSpaceID_None) {
+ if (aName == nsGkAtoms::disabled) {
+ UpdateDisabledState(aNotify);
+ }
+
+ if (aName == nsGkAtoms::value && Selected()) {
+ // Since this option is selected, changing value may have changed missing
+ // validity state of the select element
+ if (HTMLSelectElement* select = GetSelect()) {
+ select->UpdateValueMissingValidityState();
+ }
+ }
+
+ if (aName == nsGkAtoms::selected) {
+ SetStates(ElementState::DEFAULT, !!aValue, aNotify);
+ }
+ }
+
+ return nsGenericHTMLElement::AfterSetAttr(
+ aNameSpaceID, aName, aValue, aOldValue, aSubjectPrincipal, aNotify);
+}
+
+void HTMLOptionElement::GetText(nsAString& aText) {
+ nsAutoString text;
+
+ nsIContent* child = nsINode::GetFirstChild();
+ while (child) {
+ if (Text* textChild = child->GetAsText()) {
+ textChild->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;
+}
+
+void HTMLOptionElement::SetText(const nsAString& aText, ErrorResult& aRv) {
+ aRv = nsContentUtils::SetNodeTextContent(this, aText, false);
+}
+
+nsresult HTMLOptionElement::BindToTree(BindContext& aContext,
+ nsINode& aParent) {
+ nsresult rv = nsGenericHTMLElement::BindToTree(aContext, aParent);
+ NS_ENSURE_SUCCESS(rv, rv);
+
+ // Our new parent might change :disabled/:enabled state.
+ UpdateDisabledState(false);
+
+ return NS_OK;
+}
+
+void HTMLOptionElement::UnbindFromTree(bool aNullParent) {
+ nsGenericHTMLElement::UnbindFromTree(aNullParent);
+
+ // Our previous parent could have been involved in :disabled/:enabled state.
+ UpdateDisabledState(false);
+}
+
+// Get the select content element that contains this option
+HTMLSelectElement* HTMLOptionElement::GetSelect() {
+ nsIContent* parent = GetParent();
+ if (!parent) {
+ return nullptr;
+ }
+
+ HTMLSelectElement* select = HTMLSelectElement::FromNode(parent);
+ if (select) {
+ return select;
+ }
+
+ if (!parent->IsHTMLElement(nsGkAtoms::optgroup)) {
+ return nullptr;
+ }
+
+ return HTMLSelectElement::FromNodeOrNull(parent->GetParent());
+}
+
+already_AddRefed<HTMLOptionElement> HTMLOptionElement::Option(
+ const GlobalObject& aGlobal, const nsAString& aText,
+ const Optional<nsAString>& aValue, bool aDefaultSelected, bool aSelected,
+ ErrorResult& aError) {
+ nsCOMPtr<nsPIDOMWindowInner> win = do_QueryInterface(aGlobal.GetAsSupports());
+ Document* doc;
+ if (!win || !(doc = win->GetExtantDoc())) {
+ aError.Throw(NS_ERROR_FAILURE);
+ return nullptr;
+ }
+
+ RefPtr<mozilla::dom::NodeInfo> nodeInfo = doc->NodeInfoManager()->GetNodeInfo(
+ nsGkAtoms::option, nullptr, kNameSpaceID_XHTML, ELEMENT_NODE);
+
+ auto* nim = nodeInfo->NodeInfoManager();
+ RefPtr<HTMLOptionElement> option =
+ new (nim) HTMLOptionElement(nodeInfo.forget());
+
+ if (!aText.IsEmpty()) {
+ // Create a new text node and append it to the option
+ RefPtr<nsTextNode> textContent = new (option->NodeInfo()->NodeInfoManager())
+ nsTextNode(option->NodeInfo()->NodeInfoManager());
+
+ textContent->SetText(aText, false);
+
+ option->AppendChildTo(textContent, false, aError);
+ 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) {
+ // We're calling SetAttr directly because we want to pass
+ // aNotify == false.
+ aError =
+ option->SetAttr(kNameSpaceID_None, nsGkAtoms::selected, u""_ns, false);
+ if (aError.Failed()) {
+ return nullptr;
+ }
+ }
+
+ option->SetSelected(aSelected);
+ option->SetSelectedChanged(false);
+
+ 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 HTMLOptionElement_Binding::Wrap(aCx, this, aGivenProto);
+}
+
+} // namespace mozilla::dom