1 | /*
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2 | MIT License http://www.opensource.org/licenses/mit-license.php
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3 | Author Tobias Koppers @sokra
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4 | */
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5 | ;
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6 |
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7 | const { RawSource, ReplaceSource } = require("webpack-sources");
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8 |
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9 | /** @typedef {import("./Dependency")} Dependency */
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10 | /** @typedef {import("./Dependency").DependencyTemplate} DependencyTemplate */
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11 | /** @typedef {import("./RuntimeTemplate")} RuntimeTemplate */
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12 | /** @typedef {import("./util/createHash").Hash} Hash */
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13 | /** @typedef {(d: Dependency) => boolean} DependencyFilterFunction */
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14 | /** @typedef {Map<Function, DependencyTemplate>} DependencyTemplates */
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15 |
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16 | class DependenciesBlockVariable {
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17 | /**
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18 | * Creates an instance of DependenciesBlockVariable.
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19 | * @param {string} name name of DependenciesBlockVariable
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20 | * @param {string} expression expression string
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21 | * @param {Dependency[]=} dependencies dependencies tied to this varaiable
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22 | */
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23 | constructor(name, expression, dependencies) {
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24 | this.name = name;
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25 | this.expression = expression;
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26 | this.dependencies = dependencies || [];
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27 | }
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28 |
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29 | /**
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30 | * @param {Hash} hash hash for instance to update
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31 | * @returns {void}
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32 | */
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33 | updateHash(hash) {
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34 | hash.update(this.name);
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35 | hash.update(this.expression);
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36 | for (const d of this.dependencies) {
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37 | d.updateHash(hash);
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38 | }
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39 | }
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40 |
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41 | /**
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42 | * @param {DependencyTemplates} dependencyTemplates Dependency constructors and templates Map.
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43 | * @param {RuntimeTemplate} runtimeTemplate runtimeTemplate to generate expression souce
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44 | * @returns {ReplaceSource} returns constructed source for expression via templates
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45 | */
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46 | expressionSource(dependencyTemplates, runtimeTemplate) {
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47 | const source = new ReplaceSource(new RawSource(this.expression));
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48 | for (const dep of this.dependencies) {
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49 | const template = dependencyTemplates.get(dep.constructor);
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50 | if (!template) {
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51 | throw new Error(`No template for dependency: ${dep.constructor.name}`);
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52 | }
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53 | template.apply(dep, source, runtimeTemplate, dependencyTemplates);
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54 | }
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55 | return source;
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56 | }
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57 |
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58 | disconnect() {
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59 | for (const d of this.dependencies) {
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60 | d.disconnect();
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61 | }
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62 | }
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63 |
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64 | hasDependencies(filter) {
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65 | if (filter) {
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66 | return this.dependencies.some(filter);
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67 | }
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68 | return this.dependencies.length > 0;
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69 | }
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70 | }
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71 |
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72 | module.exports = DependenciesBlockVariable;
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