work.suroh.tk/node_modules/tapable/lib/Hook.js

177 lines
4.5 KiB
JavaScript

/*
MIT License http://www.opensource.org/licenses/mit-license.php
Author Tobias Koppers @sokra
*/
"use strict";
class Hook {
constructor(args) {
if (!Array.isArray(args)) args = [];
this._args = args;
this.taps = [];
this.interceptors = [];
this.call = this._call;
this.promise = this._promise;
this.callAsync = this._callAsync;
this._x = undefined;
}
compile(options) {
throw new Error("Abstract: should be overriden");
}
_createCall(type) {
return this.compile({
taps: this.taps,
interceptors: this.interceptors,
args: this._args,
type: type
});
}
tap(options, fn) {
if (typeof options === "string") options = { name: options };
if (typeof options !== "object" || options === null)
throw new Error(
"Invalid arguments to tap(options: Object, fn: function)"
);
options = Object.assign({ type: "sync", fn: fn }, options);
if (typeof options.name !== "string" || options.name === "")
throw new Error("Missing name for tap");
options = this._runRegisterInterceptors(options);
this._insert(options);
}
tapAsync(options, fn) {
if (typeof options === "string") options = { name: options };
if (typeof options !== "object" || options === null)
throw new Error(
"Invalid arguments to tapAsync(options: Object, fn: function)"
);
options = Object.assign({ type: "async", fn: fn }, options);
if (typeof options.name !== "string" || options.name === "")
throw new Error("Missing name for tapAsync");
options = this._runRegisterInterceptors(options);
this._insert(options);
}
tapPromise(options, fn) {
if (typeof options === "string") options = { name: options };
if (typeof options !== "object" || options === null)
throw new Error(
"Invalid arguments to tapPromise(options: Object, fn: function)"
);
options = Object.assign({ type: "promise", fn: fn }, options);
if (typeof options.name !== "string" || options.name === "")
throw new Error("Missing name for tapPromise");
options = this._runRegisterInterceptors(options);
this._insert(options);
}
_runRegisterInterceptors(options) {
for (const interceptor of this.interceptors) {
if (interceptor.register) {
const newOptions = interceptor.register(options);
if (newOptions !== undefined) options = newOptions;
}
}
return options;
}
withOptions(options) {
const mergeOptions = opt =>
Object.assign({}, options, typeof opt === "string" ? { name: opt } : opt);
// Prevent creating endless prototype chains
options = Object.assign({}, options, this._withOptions);
const base = this._withOptionsBase || this;
const newHook = Object.create(base);
(newHook.tapAsync = (opt, fn) => base.tapAsync(mergeOptions(opt), fn)),
(newHook.tap = (opt, fn) => base.tap(mergeOptions(opt), fn));
newHook.tapPromise = (opt, fn) => base.tapPromise(mergeOptions(opt), fn);
newHook._withOptions = options;
newHook._withOptionsBase = base;
return newHook;
}
isUsed() {
return this.taps.length > 0 || this.interceptors.length > 0;
}
intercept(interceptor) {
this._resetCompilation();
this.interceptors.push(Object.assign({}, interceptor));
if (interceptor.register) {
for (let i = 0; i < this.taps.length; i++)
this.taps[i] = interceptor.register(this.taps[i]);
}
}
_resetCompilation() {
this.call = this._call;
this.callAsync = this._callAsync;
this.promise = this._promise;
}
_insert(item) {
this._resetCompilation();
let before;
if (typeof item.before === "string") before = new Set([item.before]);
else if (Array.isArray(item.before)) {
before = new Set(item.before);
}
let stage = 0;
if (typeof item.stage === "number") stage = item.stage;
let i = this.taps.length;
while (i > 0) {
i--;
const x = this.taps[i];
this.taps[i + 1] = x;
const xStage = x.stage || 0;
if (before) {
if (before.has(x.name)) {
before.delete(x.name);
continue;
}
if (before.size > 0) {
continue;
}
}
if (xStage > stage) {
continue;
}
i++;
break;
}
this.taps[i] = item;
}
}
function createCompileDelegate(name, type) {
return function lazyCompileHook(...args) {
this[name] = this._createCall(type);
return this[name](...args);
};
}
Object.defineProperties(Hook.prototype, {
_call: {
value: createCompileDelegate("call", "sync"),
configurable: true,
writable: true
},
_promise: {
value: createCompileDelegate("promise", "promise"),
configurable: true,
writable: true
},
_callAsync: {
value: createCompileDelegate("callAsync", "async"),
configurable: true,
writable: true
}
});
module.exports = Hook;