60 lines
1.6 KiB
JavaScript
60 lines
1.6 KiB
JavaScript
"use strict";
|
|
|
|
module.exports = Transformer;
|
|
|
|
var TransformerPass = require("./transformer-pass");
|
|
var isFunction = require("lodash/lang/isFunction");
|
|
var traverse = require("../traverse");
|
|
var isObject = require("lodash/lang/isObject");
|
|
var each = require("lodash/collection/each");
|
|
|
|
/**
|
|
* This is the class responsible for normalising a transformers handlers
|
|
* as well as constructing a `TransformerPass` that is repsonsible for
|
|
* actually running the transformer over the provided `File`.
|
|
*/
|
|
|
|
function Transformer(key, transformer, opts) {
|
|
this.manipulateOptions = transformer.manipulateOptions;
|
|
this.experimental = !!transformer.experimental;
|
|
this.playground = !!transformer.playground;
|
|
this.secondPass = !!transformer.secondPass;
|
|
this.optional = !!transformer.optional;
|
|
this.handlers = this.normalize(transformer);
|
|
this.opts = opts || {};
|
|
this.key = key;
|
|
}
|
|
|
|
Transformer.prototype.normalize = function (transformer) {
|
|
var self = this;
|
|
|
|
if (isFunction(transformer)) {
|
|
transformer = { ast: transformer };
|
|
}
|
|
|
|
traverse.explode(transformer);
|
|
|
|
each(transformer, function (fns, type) {
|
|
// hidden property
|
|
if (type[0] === "_") {
|
|
self[type] = fns;
|
|
return;
|
|
}
|
|
|
|
if (isFunction(fns)) fns = { enter: fns };
|
|
|
|
if (!isObject(fns)) return;
|
|
|
|
if (!fns.enter) fns.enter = function () { };
|
|
if (!fns.exit) fns.exit = function () { };
|
|
|
|
transformer[type] = fns;
|
|
});
|
|
|
|
return transformer;
|
|
};
|
|
|
|
Transformer.prototype.buildPass = function (file) {
|
|
return new TransformerPass(file, this);
|
|
};
|