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webidl2js‑globals.js to handle setup of [Global]s
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,143 @@ | ||
| "use strict"; | ||
| const utils = require("./utils.js"); | ||
|
|
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| class Globals { | ||
| constructor(ctx) { | ||
| this.ctx = ctx; | ||
| this.requires = new utils.RequiresMap(ctx); | ||
|
|
||
| this.str = null; | ||
| this._globalNames = new Set(); | ||
| } | ||
|
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| addGlobalNames(globalNames) { | ||
| if (typeof globalNames === "string") { | ||
| this._globalNames.add(globalNames); | ||
| } else { | ||
| for (const globalName of globalNames) { | ||
| this._globalNames.add(globalName.value); | ||
| } | ||
| } | ||
| } | ||
|
|
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| getConstructsForGlobal(globalName) { | ||
| const { ctx } = this; | ||
|
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| const constructs = []; | ||
|
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| for (const iface of [...ctx.interfaces.values(), ...ctx.callbackInterfaces.values()]) { | ||
| const exposed = utils.getExtAttr(iface.idl.extAttrs, "Exposed"); | ||
|
|
||
| if (!exposed) { | ||
| continue; | ||
| } else { | ||
| const { rhs } = exposed; | ||
| switch (rhs.type) { | ||
| case "identifier": | ||
| if (rhs.value !== globalName) { | ||
| continue; | ||
| } | ||
| break; | ||
| case "identifier-list": | ||
| if (!rhs.value.reduce((r, t) => (t.value === globalName) || r, false)) { | ||
| continue; | ||
| } | ||
| break; | ||
| default: | ||
| if (!ctx.options.suppressErrors) { | ||
| throw new Error( | ||
| `Unsupported ${iface.type} ${iface.name}'s [Exposed] extended attribute value type "${rhs.type}"` | ||
| ); | ||
| } | ||
| continue; | ||
| } | ||
| } | ||
|
|
||
| constructs.push(iface); | ||
| } | ||
|
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| // FIXME: `Element` currently gets incorrectly placed before `Node` and `EventTarget` | ||
| constructs.sort((a, b) => { | ||
| if (a.idl.inheritance === b.name) { | ||
| return 1; | ||
| } | ||
|
|
||
| if (b.idl.inheritance === a.name) { | ||
| return -1; | ||
| } | ||
|
|
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| return 0; | ||
| }); | ||
|
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| return constructs; | ||
| } | ||
|
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| generate() { | ||
| this.generateGlobals(); | ||
| this.generateRequires(); | ||
| } | ||
|
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| generateGlobals() { | ||
| this.str += ` | ||
| /** | ||
| * Initialises the passed object as a new global. | ||
| * | ||
| * The object is expected to contain all the global object properties | ||
| * as specified in the ECMAScript specification. | ||
| * | ||
| * This function has to be added to the exports object | ||
| * to avoid circular dependency issues. | ||
| * | ||
| * @param {object} globalObject | ||
| * @param {string} globalName | ||
| */ | ||
| exports.setupGlobal = (globalObject, globalName) => { | ||
| Object.defineProperty(globalObject, utils.ctorRegistrySymbol, { value: Object.create(null) }); | ||
| switch(globalName) { | ||
| `; | ||
|
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|
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| for (const globalName of this._globalNames) { | ||
| this.generateGlobal(globalName); | ||
| } | ||
|
|
||
| this.str += ` | ||
| default: | ||
| throw new Error(\`Internal error: Unknown global name "\${globalName}"\`); | ||
| } | ||
| }; | ||
| `; | ||
| } | ||
|
|
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| generateGlobal(globalName) { | ||
| this.str += ` | ||
| case "${globalName}": { | ||
| `; | ||
|
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| for (const construct of this.getConstructsForGlobal(globalName)) { | ||
| const imported = this.requires.addRelative(construct.name); | ||
| this.str += `${imported}.install(globalObject);\n`; | ||
| } | ||
|
|
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| this.str += `break; | ||
| } | ||
| `; | ||
| } | ||
|
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| generateRequires() { | ||
| this.str = ` | ||
| ${this.requires.generate()} | ||
| ${this.str} | ||
| `; | ||
| } | ||
|
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| toString() { | ||
| this.str = ""; | ||
| this.generate(); | ||
| return this.str; | ||
| } | ||
| } | ||
|
|
||
| module.exports = Globals; |
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