@dprint/formatter/esm/mod.js

Wasm formatter for dprint plugins.

import * as v3 from "./v3.js";
import * as v4 from "./v4.js";
/**
 * Creates a formatter from the specified streaming source.
 * @remarks This is the most efficient way to create a formatter.
 * @param response - The streaming source to create the formatter from.
 */
export async function createStreaming(responsePromise) {
    const response = await responsePromise;
    if (response.status !== 200) {
        throw new Error(`Unexpected status code: ${response.status}\n${await response.text()}`);
    }
    if (typeof WebAssembly.instantiateStreaming === "function"
        && response.headers.get("content-type") === "application/wasm") {
        // deno-lint-ignore no-explicit-any
        const module = await WebAssembly.compileStreaming(response);
        return createFromWasmModule(module);
    }
    else {
        // fallback for node.js or when the content type isn't application/wasm
        return response.arrayBuffer()
            .then((buffer) => createFromBuffer(buffer));
    }
}
/**
 * Creates a formatter from the specified wasm module bytes.
 * @param wasmModuleBuffer - The buffer of the wasm module.
 */
export function createFromBuffer(wasmModuleBuffer) {
    const wasmModule = new WebAssembly.Module(wasmModuleBuffer);
    return createFromWasmModule(wasmModule);
}
export function createFromWasmModule(wasmModule) {
    const version = getModuleVersionOrThrow(wasmModule);
    if (version === 3) {
        const host = v3.createHost();
        const wasmInstance = new WebAssembly.Instance(wasmModule, host.createImportObject());
        return v3.createFromInstance(wasmInstance, host);
    }
    else {
        const _assert4 = version;
        const host = v4.createHost();
        const wasmInstance = new WebAssembly.Instance(wasmModule, host.createImportObject());
        return v4.createFromInstance(wasmInstance, host);
    }
}
function getModuleVersionOrThrow(module) {
    const version = getModuleVersion(module);
    if (version == null) {
        throw new Error("Couldn't determine dprint plugin version. Maybe the js-formatter version is too old?");
    }
    else if (version === 3 || version === 4) {
        return version;
    }
    else if (version > 4) {
        throw new Error(`Unsupported new dprint plugin version '${version}'. Maybe the js-formatter version is too old?`);
    }
    else {
        throw new Error(`Unsupported old dprint plugin version '${version}'. Please upgrade the plugin.`);
    }
}
function getModuleVersion(module) {
    function getVersionFromExport(name) {
        if (name === "get_plugin_schema_version") {
            return 3;
        }
        const prefix = "dprint_plugin_version_";
        if (name.startsWith(prefix)) {
            const value = parseInt(name.substring(prefix.length), 10);
            if (!isNaN(value)) {
                return value;
            }
        }
        return undefined;
    }
    const exports = WebAssembly.Module.exports(module);
    for (const e of exports) {
        const maybeVersion = getVersionFromExport(e.name);
        if (maybeVersion != null) {
            return maybeVersion;
        }
    }
    return undefined;
}