cwebp/lib/utils.js

node.js wrapper for cwebp and dwebp binaries from WebP image processing utility

// Generated by CoffeeScript 1.12.7
var slice = [].slice;

exports.mixin = function(cls, proto) {
  var method, name;
  for (name in proto) {
    method = proto[name];
    cls.prototype[name] = method;
  }
};

exports.compile = function(methods) {
  var fn, name, params, proto;
  proto = {};
  fn = function(name, params) {
    var alias, aliases, description, exclude, i, key, len, method, ref, results, type;
    key = params.key, type = params.type, description = params.description, exclude = params.exclude, aliases = params.aliases;
    key || (key = name);
    method = type === 'boolean' ? function(val) {
      var i, k, len, ref;
      if (val || arguments.length === 0) {
        if (exclude) {
          ref = [].concat(exclude);
          for (i = 0, len = ref.length; i < len; i++) {
            k = ref[i];
            delete this._args[methods[k].key || k];
          }
        }
        this._args[key] = [];
      } else {
        delete this._args[key];
      }
      return this;
    } : (!Array.isArray(type) ? type = [type || 'string'] : void 0, function() {
      var args, i, len, nval, t, val, vals;
      args = 1 <= arguments.length ? slice.call(arguments, 0) : [];
      if (args.length < type.length) {
        throw new Error('Not enough arguments');
      }
      vals = [];
      for (i = 0, len = type.length; i < len; i++) {
        t = type[i];
        val = args.shift();
        if ((t === 'number') && (Number.isFinite(nval = Number(val)))) {
          val = nval;
        }
        if (typeof val !== t) {
          throw new Error("Expected " + t + ", got " + (typeof val));
        }
        vals.push(val);
      }
      this._args[key] = vals;
      return this;
    });
    method.description = description;
    ref = [].concat(name, aliases || []);
    results = [];
    for (i = 0, len = ref.length; i < len; i++) {
      alias = ref[i];
      results.push(proto[alias] = method);
    }
    return results;
  };
  for (name in methods) {
    params = methods[name];
    fn(name, params);
  }
  return proto;
};