HTMLFormElement-impl.js
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"use strict";
const DOMException = require("domexception/webidl2js-wrapper");
const { serializeURL } = require("whatwg-url");
const HTMLElementImpl = require("./HTMLElement-impl").implementation;
const { domSymbolTree } = require("../helpers/internal-constants");
const { fireAnEvent } = require("../helpers/events");
const { formOwner, isListed, isSubmittable, isSubmitButton } = require("../helpers/form-controls");
const HTMLCollection = require("../generated/HTMLCollection");
const notImplemented = require("../../browser/not-implemented");
const { parseURLToResultingURLRecord } = require("../helpers/document-base-url");
const encTypes = new Set([
"application/x-www-form-urlencoded",
"multipart/form-data",
"text/plain"
]);
const methods = new Set([
"get",
"post",
"dialog"
]);
const constraintValidationPositiveResult = Symbol("positive");
const constraintValidationNegativeResult = Symbol("negative");
class HTMLFormElementImpl extends HTMLElementImpl {
_descendantAdded(parent, child) {
const form = this;
for (const el of domSymbolTree.treeIterator(child)) {
if (typeof el._changedFormOwner === "function") {
el._changedFormOwner(form);
}
}
super._descendantAdded.apply(this, arguments);
}
_descendantRemoved(parent, child) {
for (const el of domSymbolTree.treeIterator(child)) {
if (typeof el._changedFormOwner === "function") {
el._changedFormOwner(null);
}
}
super._descendantRemoved.apply(this, arguments);
}
_getElementNodes() {
return domSymbolTree.treeToArray(this.getRootNode({}), {
filter: node => {
if (!isListed(node) || (node._localName === "input" && node.type === "image")) {
return false;
}
return formOwner(node) === this;
}
});
}
// https://html.spec.whatwg.org/multipage/forms.html#dom-form-elements
get elements() {
// TODO: Return a HTMLFormControlsCollection
return HTMLCollection.createImpl(this._globalObject, [], {
element: this.getRootNode({}),
query: () => this._getElementNodes()
});
}
get length() {
return this.elements.length;
}
_doSubmit() {
if (!this.isConnected) {
return;
}
this.submit();
}
submit() {
if (!fireAnEvent("submit", this, undefined, { bubbles: true, cancelable: true })) {
return;
}
notImplemented("HTMLFormElement.prototype.submit", this._ownerDocument._defaultView);
}
requestSubmit(submitter = undefined) {
if (submitter !== undefined) {
if (!isSubmitButton(submitter)) {
throw new TypeError("The specified element is not a submit button");
}
if (submitter.form !== this) {
throw DOMException.create(this._globalObject, [
"The specified element is not owned by this form element",
"NotFoundError"
]);
}
}
if (!fireAnEvent("submit", this, undefined, { bubbles: true, cancelable: true })) {
return;
}
notImplemented("HTMLFormElement.prototype.requestSubmit", this._ownerDocument._defaultView);
}
_doReset() {
if (!this.isConnected) {
return;
}
this.reset();
}
reset() {
if (!fireAnEvent("reset", this, undefined, { bubbles: true, cancelable: true })) {
return;
}
for (const el of this.elements) {
if (typeof el._formReset === "function") {
el._formReset();
}
}
}
get method() {
let method = this.getAttributeNS(null, "method");
if (method) {
method = method.toLowerCase();
}
if (methods.has(method)) {
return method;
}
return "get";
}
set method(V) {
this.setAttributeNS(null, "method", V);
}
get enctype() {
let type = this.getAttributeNS(null, "enctype");
if (type) {
type = type.toLowerCase();
}
if (encTypes.has(type)) {
return type;
}
return "application/x-www-form-urlencoded";
}
set enctype(V) {
this.setAttributeNS(null, "enctype", V);
}
get action() {
const attributeValue = this.getAttributeNS(null, "action");
if (attributeValue === null || attributeValue === "") {
return this._ownerDocument.URL;
}
const urlRecord = parseURLToResultingURLRecord(attributeValue, this._ownerDocument);
if (urlRecord === null) {
return attributeValue;
}
return serializeURL(urlRecord);
}
set action(V) {
this.setAttributeNS(null, "action", V);
}
// If the checkValidity() method is invoked, the user agent must statically validate the
// constraints of the form element, and return true if the constraint validation returned
// a positive result, and false if it returned a negative result.
checkValidity() {
return this._staticallyValidateConstraints().result === constraintValidationPositiveResult;
}
// https://html.spec.whatwg.org/multipage/form-control-infrastructure.html#interactively-validate-the-constraints
reportValidity() {
return this.checkValidity();
}
// https://html.spec.whatwg.org/multipage/form-control-infrastructure.html#statically-validate-the-constraints
_staticallyValidateConstraints() {
const controls = [];
for (const el of domSymbolTree.treeIterator(this)) {
if (el.form === this && isSubmittable(el)) {
controls.push(el);
}
}
const invalidControls = [];
for (const control of controls) {
if (control._isCandidateForConstraintValidation() && !control._satisfiesConstraints()) {
invalidControls.push(control);
}
}
if (invalidControls.length === 0) {
return { result: constraintValidationPositiveResult };
}
const unhandledInvalidControls = [];
for (const invalidControl of invalidControls) {
const notCancelled = fireAnEvent("invalid", invalidControl, undefined, { cancelable: true });
if (notCancelled) {
unhandledInvalidControls.push(invalidControl);
}
}
return { result: constraintValidationNegativeResult, unhandledInvalidControls };
}
}
module.exports = {
implementation: HTMLFormElementImpl
};