FormData-impl.js
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"use strict";
const idlUtils = require("../generated/utils");
const { closest } = require("../helpers/traversal");
const { isDisabled, isSubmittable, isButton, normalizeToCRLF } = require("../helpers/form-controls");
const Blob = require("../generated/Blob.js");
const File = require("../generated/File.js");
const conversions = require("webidl-conversions");
exports.implementation = class FormDataImpl {
constructor(globalObject, args) {
this._globalObject = globalObject;
this._entries = [];
if (args[0] !== undefined) {
this._entries = constructTheEntryList(args[0]);
}
}
append(name, value, filename) {
const entry = createAnEntry(name, value, filename);
this._entries.push(entry);
}
delete(name) {
this._entries = this._entries.filter(entry => entry.name !== name);
}
get(name) {
const foundEntry = this._entries.find(entry => entry.name === name);
return foundEntry !== undefined ? idlUtils.tryWrapperForImpl(foundEntry.value) : null;
}
getAll(name) {
return this._entries.filter(entry => entry.name === name).map(entry => idlUtils.tryWrapperForImpl(entry.value));
}
has(name) {
return this._entries.findIndex(entry => entry.name === name) !== -1;
}
set(name, value, filename) {
const entry = createAnEntry(name, value, filename);
const foundIndex = this._entries.findIndex(e => e.name === name);
if (foundIndex !== -1) {
this._entries[foundIndex] = entry;
this._entries = this._entries.filter((e, i) => e.name !== name || i === foundIndex);
} else {
this._entries.push(entry);
}
}
* [Symbol.iterator]() {
for (const entry of this._entries) {
yield [entry.name, idlUtils.tryWrapperForImpl(entry.value)];
}
}
};
function createAnEntry(name, value, filename) {
const entry = { name };
// https://github.com/whatwg/xhr/issues/75
if (Blob.isImpl(value) && !File.isImpl(value)) {
const oldValue = value;
value = File.createImpl(value._globalObject, [
[],
"blob",
{ type: oldValue.type }
]);
// "representing the same bytes"
value._buffer = oldValue._buffer;
}
if (File.isImpl(value) && filename !== undefined) {
const oldValue = value;
value = File.createImpl(value._globalObject, [
[],
filename,
// spec makes no mention of `lastModified`; assume it is inherited
// (Chrome's behavior)
{ type: oldValue.type, lastModified: oldValue.lastModified }
]);
// "representing the same bytes"
value._buffer = oldValue._buffer;
}
entry.value = value;
return entry;
}
function constructTheEntryList(form, submitter) {
// https://html.spec.whatwg.org/multipage/form-control-infrastructure.html#constructing-the-form-data-set
// TODO: handle encoding
// TODO: handling "constructing entry list"
const controls = form.elements.filter(isSubmittable); // submittable is a subset of listed
const entryList = [];
for (const field of controls) {
if (closest(field, "datalist") !== null) {
continue;
}
if (isDisabled(field)) {
continue;
}
if (isButton(field) && field !== submitter) {
continue;
}
if (field.type === "checkbox" && field._checkedness === false) {
continue;
}
if (field.type === "radio" && field._checkedness === false) {
continue;
}
if (field.localName === "object") { // in jsdom, no objects are "using a plugin"
continue;
}
// TODO: Handle <input type="image">
// TODO: handle form-associated custom elements.
const name = field.getAttributeNS(null, "name");
if (name === null || name === "") {
continue;
}
if (field.localName === "select") {
for (const option of field.options) {
if (option._selectedness === true && !isDisabled(field)) {
appendAnEntry(entryList, name, option._getValue());
}
}
} else if (field.localName === "input" && (field.type === "checkbox" || field.type === "radio")) {
const value = field.hasAttributeNS(null, "value") ? field.getAttributeNS(null, "value") : "on";
appendAnEntry(entryList, name, value);
} else if (field.type === "file") {
if (field.files.length === 0) {
const value = File.createImpl(form._globalObject, [[], "", { type: "application/octet-stream" }]);
appendAnEntry(entryList, name, value);
} else {
for (let i = 0; i < field.files.length; ++i) {
appendAnEntry(entryList, name, field.files.item(i));
}
}
} /* skip plugins. TODO: _charset_ */ else if (field.localName === "textarea") {
appendAnEntry(entryList, name, field._getValue(), true);
} else {
appendAnEntry(entryList, name, field._getValue());
}
const dirname = field.getAttributeNS(null, "dirname");
if (dirname !== null && dirname !== "") {
const dir = "ltr"; // jsdom does not (yet?) implement actual directionality
appendAnEntry(entryList, dirname, dir);
}
}
// TODO: formdata event
return entryList;
}
function appendAnEntry(entryList, name, value, preventLineBreakNormalization = false) {
name = conversions.USVString(normalizeToCRLF(name));
if (!File.isImpl(value)) {
if (!preventLineBreakNormalization) {
value = normalizeToCRLF(value);
}
value = conversions.USVString(value);
}
const entry = createAnEntry(name, value);
entryList.push(entry);
}