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/* 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/. */
"use strict";
/**
* Build: <objdir>/dist/@types/lib.gecko.xpcom.d.ts,
*
* from: <objdir>/config/makefiles/xpidl/*.d.json type definition files,
* generated by a previous build step.
*/
const fs = require("fs");
const URL = "https://searchfox.org/mozilla-central/source/";
const HEADER = `/**
* NOTE: Do not modify this file by hand.
* Content was generated from source XPCOM .idl files.
*/
`;
// Emit a typescript interface, along with any related enums.
function ts_interface(iface) {
let lines = [];
let base = iface.base;
iface.class = iface.id;
// Make QueryInterface optional, enable plain objects to pass as nsISupports.
let partial = iface.id === "nsISupports" ? "?" : "";
let enums = iface.enums.map(e => `typeof ${iface.id}.${e.id}`).join(" & ");
if (enums) {
base += `, Enums<${enums}>`;
iface.class += `, ${enums}`;
// Close the global scope, avoid polluting it with the namespace value.
lines.push("} // global\n");
lines.push(`declare namespace ${iface.id} {\n`);
for (let e of iface.enums) {
lines.push(`enum ${e.id} {`);
for (let v of e.variants) {
lines.push(` ${v.name} = ${v.value},`);
}
lines.push("}\n");
}
lines.push("}\n");
lines.push("declare global {\n");
}
// Handle [function] interfaces.
if (iface.callable) {
lines.push(`type ${iface.id} = Callable<{`);
} else {
lines.push(`interface ${iface.id} ${base ? `extends ${base} ` : ""}{`);
}
for (let c of iface.consts) {
lines.push(` readonly ${c.name}: ${c.value};`);
}
if (iface.consts.length && iface.members.length) {
// For style points.
lines.push("");
}
for (let m of iface.members) {
if (!m.args) {
lines.push(` ${m.readonly ? "readonly " : ""}${m.name}: ${m.type};`);
} else {
let args = [];
for (let arg of m.args) {
// If this is the generic parameter, adjust its type.
let type = arg.name === m.iid_is ? "T" : arg.type;
args.push(`${arg.name}${arg.optional ? "?" : ""}: ${type}`);
}
let type = `(${args.join(", ")}): ${m.type}`;
// Adjust signature if this is a generic method.
let signature = m.iid_is ? `<T extends nsIID>${type}<T>` : type;
lines.push(` ${m.name}${partial}${signature};`);
}
}
lines.push(iface.callable ? "}>\n" : "}\n");
return lines;
}
// Link all generated .d.json files into a self-contained ts typelib.
function ts_link(dir, files) {
let lines = [HEADER, "declare global {\n"];
let typedefs = {};
let iids = [];
for (let djson of files) {
let modules = JSON.parse(fs.readFileSync(`${dir}/${djson}`, "utf8"));
for (let mod of modules) {
lines.push(`// ${URL}${mod.path}\n`);
Object.assign(typedefs, Object.fromEntries(mod.typedefs ?? []));
for (let iface of mod.interfaces ?? []) {
if (iface.id !== "nsIXPCComponents_Interfaces") {
lines = lines.concat(ts_interface(iface));
iids.push(` ${iface.id}: nsJSIID<${iface.class}>;`);
}
}
}
}
lines.push("interface nsIXPCComponents_Interfaces {");
lines = lines.concat(iids);
lines.push("}\n");
lines.push("} // global\n");
lines.push("// Typedefs from xpidl.");
for (let [id, type] of Object.entries(typedefs).sort()) {
lines.push(`type ${id} = ${type};`);
}
lines.push("");
// Include xpcom builtins.
lines.push(fs.readFileSync(`${__dirname}/fixtures/intrinsics.d.ts`, "utf8"));
return lines;
}
// For testing.
module.exports = { ts_link };
function main(lib_dts, djson_dir, ...djson_files) {
let dts = ts_link(djson_dir, djson_files).join("\n");
console.log(`[INFO] ${lib_dts} (${dts.length.toLocaleString()} bytes)`);
fs.writeFileSync(lib_dts, dts);
}
if (require.main === module) {
main(...process.argv.slice(2));
}
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