/* 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/. */
#ifndef mozilla_dom_HTMLSelectElement_h
#define mozilla_dom_HTMLSelectElement_h
#include "mozilla/Attributes.h"
#include "mozilla/EnumSet.h"
#include "mozilla/dom/BindingDeclarations.h"
#include "mozilla/dom/ConstraintValidation.h"
#include "mozilla/dom/HTMLFormElement.h"
#include "mozilla/dom/HTMLOptionsCollection.h"
#include "nsContentUtils.h"
#include "nsError.h"
#include "nsGenericHTMLElement.h"
#include "nsStubMutationObserver.h"
class nsIDOMHTMLOptionElement;
class nsListControlFrame;
namespace mozilla {
class ErrorResult;
class EventChainPostVisitor;
class EventChainPreVisitor;
class SelectContentData;
class PresState;
namespace dom {
class ContentList;
class FormData;
class HTMLButtonElement;
class HTMLCollection;
class HTMLElementOrLong;
class HTMLOptionElementOrHTMLOptGroupElement;
class HTMLSelectElement;
class HTMLSelectedContentElement;
/**
* Implementation of <select>
*/
class HTMLSelectElement final :
public nsGenericHTMLFormControlElementWithState,
public nsStubMutationObserver,
public ConstraintValidation {
public:
/**
* IsSelected whether to set the option(s) to true or false
*
* ClearAll whether to clear all other options (for example, if you
* are normal-clicking on the current option)
*
* SetDisabled whether it is permissible to set disabled options
* (for JavaScript)
*
* Notify whether to notify frames and such
*
* NoReselect no need to select something after an option is
* deselected (for reset)
*
* InsertingOptions if an option has just been inserted some bailouts can't
* be taken
*/
enum
class OptionFlag : uint8_t {
IsSelected,
ClearAll,
SetDisabled,
Notify,
NoReselect,
InsertingOptions
};
using OptionFlags = EnumSet<OptionFlag>;
using ConstraintValidation::GetValidationMessage;
explicit HTMLSelectElement(already_AddRefed<mozilla::dom::NodeInfo> aNodeInfo,
FromParser aFromParser = NOT_FROM_PARSER);
NS_IMPL_FROMNODE_HTML_WITH_TAG(HTMLSelectElement, select)
// nsISupports
NS_DECL_ISUPPORTS_INHERITED
// For comboboxes, we need to keep the list up to date when options change.
NS_DECL_NSIMUTATIONOBSERVER_ATTRIBUTECHANGED
NS_DECL_NSIMUTATIONOBSERVER_CHARACTERDATACHANGED
NS_DECL_NSIMUTATIONOBSERVER_CONTENTREMOVED
NS_DECL_NSIMUTATIONOBSERVER_CONTENTAPPENDED
NS_DECL_NSIMUTATIONOBSERVER_CONTENTINSERTED
int32_t TabIndexDefault() override;
// Element
bool IsInteractiveHTMLContent()
const override {
return true; }
// WebIdl HTMLSelectElement
void GetAutocomplete(DOMString& aValue);
void SetAutocomplete(
const nsAString& aValue, ErrorResult& aRv) {
SetHTMLAttr(nsGkAtoms::autocomplete, aValue, aRv);
}
void GetAutocompleteInfo(AutocompleteInfo& aInfo);
// Sets the user interacted flag and fires input/change events if needed.
MOZ_CAN_RUN_SCRIPT
void UserFinishedInteracting(
bool aChanged);
bool Disabled()
const {
return GetBoolAttr(nsGkAtoms::disabled); }
void SetDisabled(
bool aVal, ErrorResult& aRv) {
SetHTMLBoolAttr(nsGkAtoms::disabled, aVal, aRv);
}
bool Multiple()
const {
return GetBoolAttr(nsGkAtoms::multiple); }
void SetMultiple(
bool aVal, ErrorResult& aRv) {
SetHTMLBoolAttr(nsGkAtoms::multiple, aVal, aRv);
}
void GetName(DOMString& aValue) { GetHTMLAttr(nsGkAtoms::name, aValue); }
void SetName(
const nsAString& aName, ErrorResult& aRv) {
SetHTMLAttr(nsGkAtoms::name, aName, aRv);
}
bool Required()
const {
return State().HasState(ElementState::REQUIRED); }
void SetRequired(
bool aVal, ErrorResult& aRv) {
SetHTMLBoolAttr(nsGkAtoms::required, aVal, aRv);
}
uint32_t Size()
const {
return GetUnsignedIntAttr(nsGkAtoms::size,
0); }
void SetSize(uint32_t aSize, ErrorResult& aRv) {
SetUnsignedIntAttr(nsGkAtoms::size, aSize,
0, aRv);
}
void GetType(nsAString& aValue);
HTMLOptionsCollection* Options()
const {
return mOptions; }
uint32_t Length()
const {
return mOptions->Length(); }
void SetLength(uint32_t aLength, ErrorResult& aRv);
Element* IndexedGetter(uint32_t aIdx,
bool& aFound)
const {
return mOptions->IndexedGetter(aIdx, aFound);
}
HTMLOptionElement* Item(uint32_t aIdx)
const {
return mOptions->ItemAsOption(aIdx);
}
HTMLOptionElement* NamedItem(
const nsAString& aName)
const {
return static_cast<HTMLOptionElement*>(
mOptions->NamedItem(aName,
/* aDoFlush = */ true));
}
void Add(
const HTMLOptionElementOrHTMLOptGroupElement& aElement,
const Nullable<HTMLElementOrLong>& aBefore, ErrorResult& aRv);
void Remove(int32_t aIndex)
const;
void IndexedSetter(uint32_t aIndex, HTMLOptionElement* aOption,
ErrorResult& aRv) {
mOptions->IndexedSetter(aIndex, aOption, aRv);
}
static bool MatchSelectedOptions(Element* aElement, int32_t, nsAtom*,
void*);
HTMLCollection* SelectedOptions();
int32_t SelectedIndex()
const;
// During removal handling we might need to ignore some options that are
// getting removed.
using IgnoredOptionList = Span<RefPtr<HTMLOptionElement>>;
HTMLOptionElement* GetSelectedOption(IgnoredOptionList = {})
const;
void SetSelectedIndex(int32_t aIdx);
void GetValue(nsAString& aValue)
const;
void SetValue(
const nsAString& aValue);
// Override SetCustomValidity so we update our state properly when it's called
// via bindings.
void SetCustomValidity(
const nsAString& aError);
void ShowPicker(ErrorResult& aRv);
using nsINode::Remove;
// nsINode
JSObject* WrapNode(JSContext*, JS::Handle<JSObject*> aGivenProto) override;
// nsIContent
void GetEventTargetParent(EventChainPreVisitor& aVisitor) override;
MOZ_CAN_RUN_SCRIPT_BOUNDARY
nsresult PostHandleEvent(EventChainPostVisitor& aVisitor) override;
HTMLOptionElement* GetCurrentOption()
const;
bool IsHTMLFocusable(IsFocusableFlags,
bool* aIsFocusable,
int32_t* aTabIndex) override;
// nsGenericHTMLElement
bool IsDisabledForEvents(WidgetEvent* aEvent) override;
// nsGenericHTMLFormElement
void SaveState() override;
bool RestoreState(PresState* aState) override;
// Overriden nsIFormControl methods
MOZ_CAN_RUN_SCRIPT NS_IMETHOD Reset() override;
NS_IMETHOD SubmitNamesValues(FormData* aFormData) override;
void FieldSetDisabledChanged(
bool aNotify) override;
/**
* Checks whether an option is disabled (even if it's part of an optgroup)
*
* @param aIndex the index of the option to check
* @return whether the option is disabled
*/
NS_IMETHOD IsOptionDisabled(int32_t aIndex,
bool* aIsDisabled);
bool IsOptionDisabled(HTMLOptionElement* aOption)
const;
/**
* Sets multiple options (or just sets startIndex if select is single)
* and handles notifications and cleanup and everything under the sun.
* When this method exits, the select will be in a consistent state. i.e.
* if you set the last option to false, it will select an option anyway.
*
* @param aStartIndex the first index to set
* @param aEndIndex the last index to set (set same as first index for one
* option)
* @param aOptionsMask determines whether to set, clear all or disable
* options and whether frames are to be notified of such.
* @return whether any options were actually changed
*/
bool SetOptionsSelectedByIndex(int32_t aStartIndex, int32_t aEndIndex,
OptionFlags aOptionsMask);
/**
* Called when an attribute is about to be changed
*/
nsresult BindToTree(BindContext&, nsINode& aParent) override;
void UnbindFromTree(UnbindContext&) override;
void BeforeSetAttr(int32_t aNameSpaceID, nsAtom* aName,
const nsAttrValue* aValue,
bool aNotify) override;
void AfterSetAttr(int32_t aNameSpaceID, nsAtom* aName,
const nsAttrValue* aValue,
const nsAttrValue* aOldValue,
nsIPrincipal* aSubjectPrincipal,
bool aNotify) override;
void DoneAddingChildren(
bool aHaveNotified) override;
bool IsDoneAddingChildren()
const {
return mIsDoneAddingChildren; }
bool ParseAttribute(int32_t aNamespaceID, nsAtom* aAttribute,
const nsAString& aValue,
nsIPrincipal* aMaybeScriptedPrincipal,
nsAttrValue& aResult) override;
nsMapRuleToAttributesFunc GetAttributeMappingFunction()
const override;
nsChangeHint GetAttributeChangeHint(
const nsAtom* aAttribute,
AttrModType aModType)
const override;
NS_IMETHOD_(
bool) IsAttributeMapped(
const nsAtom* aAttribute)
const override;
nsresult Clone(dom::NodeInfo*, nsINode** aResult)
const override;
NS_DECL_CYCLE_COLLECTION_CLASS_INHERITED(
HTMLSelectElement, nsGenericHTMLFormControlElementWithState)
HTMLOptionsCollection* GetOptions() {
return mOptions; }
// ConstraintValidation
nsresult GetValidationMessage(nsAString& aValidationMessage,
ValidityStateType aType) override;
void UpdateValueMissingValidityState(IgnoredOptionList = {});
void UpdateValidityElementStates(
bool aNotify);
/**
* Insert aElement before the node given by aBefore
*/
void Add(nsGenericHTMLElement& aElement, nsGenericHTMLElement* aBefore,
ErrorResult& aError);
void Add(nsGenericHTMLElement& aElement, int32_t aIndex,
ErrorResult& aError) {
// If item index is out of range, insert to last.
// (since beforeElement becomes null, it is inserted to last)
Element* beforeContent = mOptions->Item(aIndex);
return Add(aElement, nsGenericHTMLElement::FromNodeOrNull(beforeContent),
aError);
}
/** Is this a combobox? */
bool IsCombobox()
const {
return !Multiple() && Size() <=
1; }
bool OpenInParentProcess()
const {
return mIsOpenInParentProcess; }
void SetOpenInParentProcess(
bool aVal) {
mIsOpenInParentProcess = aVal;
SetStates(ElementState::OPEN, aVal);
}
void GetPreviewValue(nsAString& aValue) { aValue = mPreviewValue; }
void SetPreviewValue(
const nsAString& aValue);
void SetAutofillState(
const nsAString& aState) {
SetFormAutofillState(aState);
}
void GetAutofillState(nsAString& aState) { GetFormAutofillState(aState); }
HTMLButtonElement* GetFirstButton()
const;
void SetupShadowTree();
void GetSlotNameFor(
const ShadowRoot&,
const nsIContent&,
nsAString&)
const override;
void OnChildBeforeSlotted(ShadowRoot&, nsIContent&) override;
void OnChildUnslotted(ShadowRoot&, nsIContent&) override;
// Returns the text node that has the selected <option>'s text.
// Note that it might return null for printing.
Text* GetSelectedContentText()
const;
void SelectedContentTextMightHaveChanged(
bool aNotify =
true,
IgnoredOptionList = {});
// https://html.spec.whatwg.org/#selectedness-setting-algorithm
// NOTE: PR https://github.com/whatwg/html/pull/12263 rewrites this algorithm
// aIgnored: options to skip (for pre-removal handling where options are still
// in the list but about to be unbound).
void RunSelectednessSettingAlgorithm(
bool aNotify =
true,
bool aInsertionOrRemovalSteps = false,
IgnoredOptionList aIgnored = {});
// Queues a microtask to update all descendant selectedcontent elements.
// Multiple calls coalesce into a single update.
void ScheduleSelectedContentUpdate();
// Like ScheduleSelectedContentUpdate but uses AddScriptRunner instead of a
// microtask, so it fires in FIFO order with post-connection script runners.
// aForceUpdate: skips IsInComposedDoc and mSelectedContentUpdatePending
// guards. Used by spec algorithms (select.value, select.selectedIndex) that
// must update selectedcontent even on disconnected selects and must not be
// coalesced with deferred mutation-driven updates. Safe from re-entrance
// because JS setters cannot be called during UpdateDescendantSelectedContent.
void ScheduleSelectedContentUpdateScriptRunner(
bool aForceUpdate = false);
// https://html.spec.whatwg.org/#update-a-select's-descendant-selectedcontent-elements
MOZ_CAN_RUN_SCRIPT
void UpdateDescendantSelectedContentElements();
// https://html.spec.whatwg.org/#update-a-selectedcontent
MOZ_CAN_RUN_SCRIPT
void UpdateSelectedContentElement(
HTMLSelectedContentElement* aSelectedContent);
// https://html.spec.whatwg.org/#clone-an-option-into-a-selectedcontent
MOZ_CAN_RUN_SCRIPT
void CloneOptionIntoSelectedContent(
HTMLOptionElement* aOption, HTMLSelectedContentElement* aSelectedContent);
protected:
virtual ~HTMLSelectElement();
// Helper Methods
/**
* Check whether the option specified by the index is selected
* @param aIndex the index
* @return whether the option at the index is selected
*/
bool IsOptionSelectedByIndex(int32_t aIndex)
const;
/**
* Starting with (and including) aStartIndex, find the first selected index
* and set mSelectedIndex to it.
* @param aStartIndex the index to start with
*/
void FindSelectedIndex(int32_t aStartIndex,
bool aNotify);
/**
* Called to trigger notifications of frames and fixing selected index
*
* @param aIndex the index that was selected or deselected
* @param aSelected whether the index was selected or deselected
* @param aChangeOptionState if false, don't do anything to the
* HTMLOptionElement at aIndex. If true, change
* its selected state to aSelected.
* @param aNotify whether to notify the style system and such
*/
void OnOptionSelected(int32_t aIndex,
bool aSelected,
bool aChangeOptionState,
bool aNotify);
/**
* Restore state to a particular state string (representing the options)
* @param aNewSelected the state string to restore to
*/
void RestoreStateTo(
const SelectContentData& aNewSelected);
// nsIConstraintValidation
void UpdateBarredFromConstraintValidation();
bool IsValueMissing(IgnoredOptionList = {})
const;
/**
* Get the index of the first option at, under or following the content in
* the select, or length of options[] if none are found
* @param aOptions the content
* @return the index of the first option
*/
int32_t GetOptionIndexAt(nsIContent* aOptions);
/**
* Get the next option following the content in question (not at or under)
* (this could include siblings of the current content or siblings of the
* parent or children of siblings of the parent).
* @param aOptions the content
* @return the index of the next option after the content
*/
int32_t GetOptionIndexAfter(nsIContent* aOptions);
/**
* Get the first option index at or under the content in question.
* @param aOptions the content
* @return the index of the first option at or under the content
*/
int32_t GetFirstOptionIndex(nsIContent* aOptions);
/**
* Get the first option index under the content in question, within the
* range specified.
* @param aOptions the content
* @param aStartIndex the first child to look at
* @param aEndIndex the child *after* the last child to look at
* @return the index of the first option at or under the content
*/
int32_t GetFirstChildOptionIndex(nsIContent* aOptions, int32_t aStartIndex,
int32_t aEndIndex);
/** Get the frame as an nsListControlFrame (MAY RETURN nullptr) */
nsListControlFrame* GetListBoxFrame();
/**
* Helper method for dispatching ContentReset notifications to list box
* frames.
*/
void DispatchContentReset();
void SetSelectedIndexInternal(int32_t aIndex,
bool aNotify);
void OnSelectionChanged();
/**
* Marks the selectedOptions list as dirty, so that it'll populate itself
* again.
*/
void UpdateSelectedOptions();
void SetUserInteracted(
bool) final;
MOZ_CAN_RUN_SCRIPT nsresult HandleKeyDown(EventChainPostVisitor&);
MOZ_CAN_RUN_SCRIPT nsresult HandleKeyPress(EventChainPostVisitor&);
MOZ_CAN_RUN_SCRIPT nsresult HandleMouseDown(EventChainPostVisitor&);
MOZ_CAN_RUN_SCRIPT nsresult HandleMouseUp(EventChainPostVisitor&);
MOZ_CAN_RUN_SCRIPT nsresult HandleMouseMove(EventChainPostVisitor&);
void AdjustIndexForDisabledOpt(int32_t aStartIndex, int32_t& aNewIndex,
int32_t aNumOptions, int32_t aDoAdjustInc,
int32_t aDoAdjustIncNext);
bool IsOptionInteractivelySelectable(uint32_t aIndex)
const;
int32_t GetEndSelectionIndex()
const;
int32_t ItemsPerPage()
const;
MOZ_CAN_RUN_SCRIPT
void PostHandleKeyEvent(int32_t aNewIndex, uint32_t aCharCode,
bool aIsShift,
bool aIsControlOrMeta);
HTMLOptionElement* GetNonDisabledOptionFrom(
int32_t aFromIndex, int32_t* aFoundIndex = nullptr)
const;
MOZ_CAN_RUN_SCRIPT
void FireDropDownEvent(
bool aShow,
bool aIsSourceTouchEvent);
void ContentAppendedOrInserted(nsIContent* aFirstNewContent,
bool aIsAppend);
/** The options[] array */
RefPtr<HTMLOptionsCollection> mOptions;
nsContentUtils::AutocompleteAttrState mAutocompleteAttrState;
nsContentUtils::AutocompleteAttrState mAutocompleteInfoState;
/** false if the parser is in the middle of adding children. */
bool mIsDoneAddingChildren :
1;
/** true if our disabled state has changed from the default **/
bool mDisabledChanged :
1 = false;
/** True if DoneAddingChildren will get called but shouldn't restore state. */
bool mInhibitStateRestoration :
1;
/** https://html.spec.whatwg.org/#user-interacted */
bool mUserInteracted :
1 = false;
/** True if the default selected option has been set. */
bool mDefaultSelectionSet :
1 = false;
/** True if we're open in the parent process */
bool mIsOpenInParentProcess :
1 = false;
bool mButtonDown :
1 = false;
bool mControlSelectMode :
1 = false;
/**
* True once a selectedcontent update has been scheduled (as a microtask or a
* script runner) but has not run yet. Used to coalesce multiple mutations
* into a single update.
*/
bool mSelectedContentUpdatePending :
1 = false;
/**
* True while we are cloning the selected option into our descendant
* selectedcontent elements. Used to ignore the mutation observer
* notifications caused by that cloning, which would otherwise schedule a
* redundant update.
*/
bool mIsUpdatingSelectedContent :
1 = false;
/**
* The temporary restore state in case we try to restore before parser is
* done adding options
*/
UniquePtr<SelectContentData> mRestoreState;
/**
* The live list of selected options.
*/
RefPtr<ContentList> mSelectedOptions;
/**
* The current displayed preview text.
*/
nsString mPreviewValue;
private:
static void MapAttributesIntoRule(MappedDeclarationsBuilder&);
};
}
// namespace dom
}
// namespace mozilla
#endif // mozilla_dom_HTMLSelectElement_h