asset-rack/compiled/modules/less.js

Static Web Framework for Nodejs

// Generated by CoffeeScript 1.6.3
(function() {
  var Asset, ensureLessError, fs, less, pathutil, urlRegex, urlRegexGlobal, _ref,
    __hasProp = {}.hasOwnProperty,
    __extends = function(child, parent) { for (var key in parent) { if (__hasProp.call(parent, key)) child[key] = parent[key]; } function ctor() { this.constructor = child; } ctor.prototype = parent.prototype; child.prototype = new ctor(); child.__super__ = parent.prototype; return child; };

  less = require('less');

  fs = require('fs');

  pathutil = require('path');

  Asset = require('../.').Asset;

  urlRegex = /url\s*\(\s*(['"])((?:(?!\1).)+)\1\s*\)/;

  urlRegexGlobal = /url\s*\(\s*(['"])((?:(?!\1).)+)\1\s*\)/g;

  exports.LessAsset = (function(_super) {
    __extends(LessAsset, _super);

    function LessAsset() {
      _ref = LessAsset.__super__.constructor.apply(this, arguments);
      return _ref;
    }

    LessAsset.prototype.mimetype = 'text/css';

    LessAsset.prototype.create = function(options) {
      var error, fileContents, parser,
        _this = this;
      if (options.filename) {
        this.filename = pathutil.resolve(options.filename);
        fileContents = fs.readFileSync(this.filename, 'utf8');
      } else {
        if (fileContents == null) {
          fileContents = options.contents;
        }
      }
      this.paths = options.paths;
      if (this.paths == null) {
        this.paths = [];
      }
      this.paths.push(pathutil.dirname(options.filename));
      this.toWatch = pathutil.dirname(this.filename);
      this.compress = options.compress;
      if (this.compress == null) {
        this.compress = false;
      }
      try {
        parser = new less.Parser({
          filename: this.filename,
          paths: this.paths
        });
        return parser.parse(fileContents, function(error, tree) {
          var match, quote, raw, result, results, specificUrl, url, _i, _len;
          if (error != null) {
            return _this.emit('error', ensureLessError(error));
          }
          raw = tree.toCSS({
            compress: _this.compress
          });
          if (_this.rack != null) {
            results = raw.match(urlRegexGlobal);
            if (results) {
              for (_i = 0, _len = results.length; _i < _len; _i++) {
                result = results[_i];
                match = urlRegex.exec(result);
                quote = match[1];
                url = match[2];
                specificUrl = _this.rack.url(url);
                if (specificUrl != null) {
                  raw = raw.replace(result, "url(" + quote + specificUrl + quote + ")");
                }
              }
            }
          }
          return _this.emit('created', {
            contents: raw
          });
        });
      } catch (_error) {
        error = _error;
        error = ensureLessError(error);
        return this.emit('error', error);
      }
    };

    return LessAsset;

  })(Asset);

  ensureLessError = function(error) {
    var extract, line, msg, _i, _len, _ref1;
    if (!(error instanceof Error)) {
      if (!error.filename) {
        error.filename = "[provided asset content]";
      }
      msg = "Less error: " + error.message + "\n\tfilename: " + error.filename + "\n\tline " + error.line + " column " + error.column;
      line = error.line;
      msg += "\n\t...";
      if (error.extract != null) {
        _ref1 = error.extract;
        for (_i = 0, _len = _ref1.length; _i < _len; _i++) {
          extract = _ref1[_i];
          if (extract) {
            msg += "\n\t " + (line++) + ": " + extract;
          }
        }
      }
      msg += "\n\t...";
      error = new Error(msg);
    }
    return error;
  };

}).call(this);