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Dir : ~/var/www/invoice/node_modules/pug-strip-comments/

View File Name : index.js

'use strict';

var error = require('pug-error');

module.exports = stripComments;

function unexpectedToken (type, occasion, filename, line) {
  var msg = '`' + type + '` encountered when ' + occasion;
  throw error('UNEXPECTED_TOKEN', msg, { filename: filename, line: line });
}

function stripComments (input, options) {
  options = options || {};

  // Default: strip unbuffered comments and leave buffered ones alone
  var stripUnbuffered = options.stripUnbuffered !== false;
  var stripBuffered   = options.stripBuffered   === true;
  var filename        = options.filename;

  var out = [];
  // If we have encountered a comment token and are not sure if we have gotten
  // out of the comment or not
  var inComment = false;
  // If we are sure that we are in a block comment and all tokens except
  // `end-pipeless-text` should be ignored
  var inPipelessText = false;

  return input.filter(function (tok) {
    switch (tok.type) {
      case 'comment':
        if (inComment) {
          unexpectedToken(
            'comment', 'already in a comment', filename, tok.line
          );
        } else {
          inComment = tok.buffer ? stripBuffered : stripUnbuffered;
          return !inComment;
        }
      case 'start-pipeless-text':
        if (!inComment) return true;
        if (inPipelessText) {
          unexpectedToken(
            'start-pipeless-text', 'already in pipeless text mode',
            filename, tok.line
          );
        }
        inPipelessText = true;
        return false;
      case 'end-pipeless-text':
        if (!inComment) return true;
        if (!inPipelessText) {
          unexpectedToken(
            'end-pipeless-text', 'not in pipeless text mode',
            filename, tok.line
          );
        }
        inPipelessText = false;
        inComment = false;
        return false;
      // There might be a `text` right after `comment` but before
      // `start-pipeless-text`. Treat it accordingly.
      case 'text':
        return !inComment;
      default:
        if (inPipelessText) return false;
        inComment = false;
        return true;
    }
  });
}