Function processTypescriptSource

gulpfile.js:1092–1141

* Process the given typescript source. * * For details, see the inlined comments. * * @param {string} definitionsPath The path of the defintions file * @param {string} source The source * @returns The new source

(definitionsPath, source)

 * @returns The new source
 */
function processTypescriptSource(definitionsPath, source) {
  // All of our enum assignments that alias to WebGLConstants, such as PixelDatatype.js
  // end up as enum strings instead of actually mapping values to WebGLConstants.
  // We fix this with a simple regex replace later on, but it means the
  // WebGLConstants constants enum needs to be defined in the file before it can
  // be used.  This block of code reads in the TS file, finds the WebGLConstants
  // declaration, and then writes the file back out (in memory to source) with
  // WebGLConstants being the first module.
  const node = typeScript.createSourceFile(
    definitionsPath,
    source,
    typeScript.ScriptTarget.Latest,
  );
  let firstNode;
  node.forEachChild((child) => {
    if (
      typeScript.SyntaxKind[child.kind] === "EnumDeclaration" &&
      child.name.escapedText === "WebGLConstants"
    ) {
      firstNode = child;
    }
  });

  const printer = typeScript.createPrinter({
    removeComments: false,
    newLine: typeScript.NewLineKind.LineFeed,
  });

  let newSource = "";
  newSource += printer.printNode(
    typeScript.EmitHint.Unspecified,
    firstNode,
    node,
  );
  newSource += "\n\n";
  node.forEachChild((child) => {
    if (
      typeScript.SyntaxKind[child.kind] !== "EnumDeclaration" ||
      child.name.escapedText !== "WebGLConstants"
    ) {
      newSource += printer.printNode(
        typeScript.EmitHint.Unspecified,
        child,
        node,
      );
      newSource += "\n\n";
    }
  });
  return newSource;
}

function processEngineSource(definitionsPath, source) {
  let newSource = processTypescriptSource(definitionsPath, source);