DependenciesBlock.js
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/*
MIT License http://www.opensource.org/licenses/mit-license.php
Author Tobias Koppers @sokra
*/
"use strict";
const DependenciesBlockVariable = require("./DependenciesBlockVariable");
/** @typedef {import("./ChunkGroup")} ChunkGroup */
/** @typedef {import("./Dependency")} Dependency */
/** @typedef {import("./AsyncDependenciesBlock")} AsyncDependenciesBlock */
/** @typedef {import("./DependenciesBlockVariable")} DependenciesBlockVariable */
/** @typedef {(d: Dependency) => boolean} DependencyFilterFunction */
/** @typedef {import("./util/createHash").Hash} Hash */
class DependenciesBlock {
constructor() {
/** @type {Dependency[]} */
this.dependencies = [];
/** @type {AsyncDependenciesBlock[]} */
this.blocks = [];
/** @type {DependenciesBlockVariable[]} */
this.variables = [];
}
/**
* Adds a DependencyBlock to DependencyBlock relationship.
* This is used for when a Module has a AsyncDependencyBlock tie (for code-splitting)
*
* @param {AsyncDependenciesBlock} block block being added
* @returns {void}
*/
addBlock(block) {
this.blocks.push(block);
block.parent = this;
}
/**
* @param {string} name name of dependency
* @param {string} expression expression string for variable
* @param {Dependency[]} dependencies dependency instances tied to variable
* @returns {void}
*/
addVariable(name, expression, dependencies) {
for (let v of this.variables) {
if (v.name === name && v.expression === expression) {
return;
}
}
this.variables.push(
new DependenciesBlockVariable(name, expression, dependencies)
);
}
/**
* @param {Dependency} dependency dependency being tied to block.
* This is an "edge" pointing to another "node" on module graph.
* @returns {void}
*/
addDependency(dependency) {
this.dependencies.push(dependency);
}
/**
* @param {Dependency} dependency dependency being removed
* @returns {void}
*/
removeDependency(dependency) {
const idx = this.dependencies.indexOf(dependency);
if (idx >= 0) {
this.dependencies.splice(idx, 1);
}
}
/**
* @param {Hash} hash the hash used to track dependencies
* @returns {void}
*/
updateHash(hash) {
for (const dep of this.dependencies) dep.updateHash(hash);
for (const block of this.blocks) block.updateHash(hash);
for (const variable of this.variables) variable.updateHash(hash);
}
disconnect() {
for (const dep of this.dependencies) dep.disconnect();
for (const block of this.blocks) block.disconnect();
for (const variable of this.variables) variable.disconnect();
}
unseal() {
for (const block of this.blocks) block.unseal();
}
/**
* @param {DependencyFilterFunction} filter filter function for dependencies, gets passed all dependency ties from current instance
* @returns {boolean} returns boolean for filter
*/
hasDependencies(filter) {
if (filter) {
for (const dep of this.dependencies) {
if (filter(dep)) return true;
}
} else {
if (this.dependencies.length > 0) {
return true;
}
}
for (const block of this.blocks) {
if (block.hasDependencies(filter)) return true;
}
for (const variable of this.variables) {
if (variable.hasDependencies(filter)) return true;
}
return false;
}
sortItems() {
for (const block of this.blocks) block.sortItems();
}
}
module.exports = DependenciesBlock;