node_modules/postcss/lib/parser.js - master - eb/Surf

node_modules/postcss/lib/parser.js
611 строк55 KB
EvgeniyBudaev
Initial commit
17 фев 2020, 09:02
17 фев 2020, 09:02bb6f06f
"use strict";

exports.__esModule = true;
exports.default = void 0;

var _declaration = _interopRequireDefault(require("./declaration"));

var _tokenize = _interopRequireDefault(require("./tokenize"));

var _comment = _interopRequireDefault(require("./comment"));

var _atRule = _interopRequireDefault(require("./at-rule"));

var _root = _interopRequireDefault(require("./root"));

var _rule = _interopRequireDefault(require("./rule"));

function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }

var Parser =
/*#__PURE__*/
function () {
  function Parser(input) {
    this.input = input;
    this.root = new _root.default();
    this.current = this.root;
    this.spaces = '';
    this.semicolon = false;
    this.createTokenizer();
    this.root.source = {
      input: input,
      start: {
        line: 1,
        column: 1
      }
    };
  }

  var _proto = Parser.prototype;

  _proto.createTokenizer = function createTokenizer() {
    this.tokenizer = (0, _tokenize.default)(this.input);
  };

  _proto.parse = function parse() {
    var token;

    while (!this.tokenizer.endOfFile()) {
      token = this.tokenizer.nextToken();

      switch (token[0]) {
        case 'space':
          this.spaces += token[1];
          break;

        case ';':
          this.freeSemicolon(token);
          break;

        case '}':
          this.end(token);
          break;

        case 'comment':
          this.comment(token);
          break;

        case 'at-word':
          this.atrule(token);
          break;

        case '{':
          this.emptyRule(token);
          break;

        default:
          this.other(token);
          break;
      }
    }

    this.endFile();
  };

  _proto.comment = function comment(token) {
    var node = new _comment.default();
    this.init(node, token[2], token[3]);
    node.source.end = {
      line: token[4],
      column: token[5]
    };
    var text = token[1].slice(2, -2);

    if (/^\s*$/.test(text)) {
      node.text = '';
      node.raws.left = text;
      node.raws.right = '';
    } else {
      var match = text.match(/^(\s*)([^]*[^\s])(\s*)$/);
      node.text = match[2];
      node.raws.left = match[1];
      node.raws.right = match[3];
    }
  };

  _proto.emptyRule = function emptyRule(token) {
    var node = new _rule.default();
    this.init(node, token[2], token[3]);
    node.selector = '';
    node.raws.between = '';
    this.current = node;
  };

  _proto.other = function other(start) {
    var end = false;
    var type = null;
    var colon = false;
    var bracket = null;
    var brackets = [];
    var tokens = [];
    var token = start;

    while (token) {
      type = token[0];
      tokens.push(token);

      if (type === '(' || type === '[') {
        if (!bracket) bracket = token;
        brackets.push(type === '(' ? ')' : ']');
      } else if (brackets.length === 0) {
        if (type === ';') {
          if (colon) {
            this.decl(tokens);
            return;
          } else {
            break;
          }
        } else if (type === '{') {
          this.rule(tokens);
          return;
        } else if (type === '}') {
          this.tokenizer.back(tokens.pop());
          end = true;
          break;
        } else if (type === ':') {
          colon = true;
        }
      } else if (type === brackets[brackets.length - 1]) {
        brackets.pop();
        if (brackets.length === 0) bracket = null;
      }

      token = this.tokenizer.nextToken();
    }

    if (this.tokenizer.endOfFile()) end = true;
    if (brackets.length > 0) this.unclosedBracket(bracket);

    if (end && colon) {
      while (tokens.length) {
        token = tokens[tokens.length - 1][0];
        if (token !== 'space' && token !== 'comment') break;
        this.tokenizer.back(tokens.pop());
      }

      this.decl(tokens);
    } else {
      this.unknownWord(tokens);
    }
  };

  _proto.rule = function rule(tokens) {
    tokens.pop();
    var node = new _rule.default();
    this.init(node, tokens[0][2], tokens[0][3]);
    node.raws.between = this.spacesAndCommentsFromEnd(tokens);
    this.raw(node, 'selector', tokens);
    this.current = node;
  };

  _proto.decl = function decl(tokens) {
    var node = new _declaration.default();
    this.init(node);
    var last = tokens[tokens.length - 1];

    if (last[0] === ';') {
      this.semicolon = true;
      tokens.pop();
    }

    if (last[4]) {
      node.source.end = {
        line: last[4],
        column: last[5]
      };
    } else {
      node.source.end = {
        line: last[2],
        column: last[3]
      };
    }

    while (tokens[0][0] !== 'word') {
      if (tokens.length === 1) this.unknownWord(tokens);
      node.raws.before += tokens.shift()[1];
    }

    node.source.start = {
      line: tokens[0][2],
      column: tokens[0][3]
    };
    node.prop = '';

    while (tokens.length) {
      var type = tokens[0][0];

      if (type === ':' || type === 'space' || type === 'comment') {
        break;
      }

      node.prop += tokens.shift()[1];
    }

    node.raws.between = '';
    var token;

    while (tokens.length) {
      token = tokens.shift();

      if (token[0] === ':') {
        node.raws.between += token[1];
        break;
      } else {
        if (token[0] === 'word' && /\w/.test(token[1])) {
          this.unknownWord([token]);
        }

        node.raws.between += token[1];
      }
    }

    if (node.prop[0] === '_' || node.prop[0] === '*') {
      node.raws.before += node.prop[0];
      node.prop = node.prop.slice(1);
    }

    node.raws.between += this.spacesAndCommentsFromStart(tokens);
    this.precheckMissedSemicolon(tokens);

    for (var i = tokens.length - 1; i > 0; i--) {
      token = tokens[i];

      if (token[1].toLowerCase() === '!important') {
        node.important = true;
        var string = this.stringFrom(tokens, i);
        string = this.spacesFromEnd(tokens) + string;
        if (string !== ' !important') node.raws.important = string;
        break;
      } else if (token[1].toLowerCase() === 'important') {
        var cache = tokens.slice(0);
        var str = '';

        for (var j = i; j > 0; j--) {
          var _type = cache[j][0];

          if (str.trim().indexOf('!') === 0 && _type !== 'space') {
            break;
          }

          str = cache.pop()[1] + str;
        }

        if (str.trim().indexOf('!') === 0) {
          node.important = true;
          node.raws.important = str;
          tokens = cache;
        }
      }

      if (token[0] !== 'space' && token[0] !== 'comment') {
        break;
      }
    }

    this.raw(node, 'value', tokens);
    if (node.value.indexOf(':') !== -1) this.checkMissedSemicolon(tokens);
  };

  _proto.atrule = function atrule(token) {
    var node = new _atRule.default();
    node.name = token[1].slice(1);

    if (node.name === '') {
      this.unnamedAtrule(node, token);
    }

    this.init(node, token[2], token[3]);
    var prev;
    var shift;
    var last = false;
    var open = false;
    var params = [];

    while (!this.tokenizer.endOfFile()) {
      token = this.tokenizer.nextToken();

      if (token[0] === ';') {
        node.source.end = {
          line: token[2],
          column: token[3]
        };
        this.semicolon = true;
        break;
      } else if (token[0] === '{') {
        open = true;
        break;
      } else if (token[0] === '}') {
        if (params.length > 0) {
          shift = params.length - 1;
          prev = params[shift];

          while (prev && prev[0] === 'space') {
            prev = params[--shift];
          }

          if (prev) {
            node.source.end = {
              line: prev[4],
              column: prev[5]
            };
          }
        }

        this.end(token);
        break;
      } else {
        params.push(token);
      }

      if (this.tokenizer.endOfFile()) {
        last = true;
        break;
      }
    }

    node.raws.between = this.spacesAndCommentsFromEnd(params);

    if (params.length) {
      node.raws.afterName = this.spacesAndCommentsFromStart(params);
      this.raw(node, 'params', params);

      if (last) {
        token = params[params.length - 1];
        node.source.end = {
          line: token[4],
          column: token[5]
        };
        this.spaces = node.raws.between;
        node.raws.between = '';
      }
    } else {
      node.raws.afterName = '';
      node.params = '';
    }

    if (open) {
      node.nodes = [];
      this.current = node;
    }
  };

  _proto.end = function end(token) {
    if (this.current.nodes && this.current.nodes.length) {
      this.current.raws.semicolon = this.semicolon;
    }

    this.semicolon = false;
    this.current.raws.after = (this.current.raws.after || '') + this.spaces;
    this.spaces = '';

    if (this.current.parent) {
      this.current.source.end = {
        line: token[2],
        column: token[3]
      };
      this.current = this.current.parent;
    } else {
      this.unexpectedClose(token);
    }
  };

  _proto.endFile = function endFile() {
    if (this.current.parent) this.unclosedBlock();

    if (this.current.nodes && this.current.nodes.length) {
      this.current.raws.semicolon = this.semicolon;
    }

    this.current.raws.after = (this.current.raws.after || '') + this.spaces;
  };

  _proto.freeSemicolon = function freeSemicolon(token) {
    this.spaces += token[1];

    if (this.current.nodes) {
      var prev = this.current.nodes[this.current.nodes.length - 1];

      if (prev && prev.type === 'rule' && !prev.raws.ownSemicolon) {
        prev.raws.ownSemicolon = this.spaces;
        this.spaces = '';
      }
    }
  } // Helpers
  ;

  _proto.init = function init(node, line, column) {
    this.current.push(node);
    node.source = {
      start: {
        line: line,
        column: column
      },
      input: this.input
    };
    node.raws.before = this.spaces;
    this.spaces = '';
    if (node.type !== 'comment') this.semicolon = false;
  };

  _proto.raw = function raw(node, prop, tokens) {
    var token, type;
    var length = tokens.length;
    var value = '';
    var clean = true;
    var next, prev;
    var pattern = /^([.|#])?([\w])+/i;

    for (var i = 0; i < length; i += 1) {
      token = tokens[i];
      type = token[0];

      if (type === 'comment' && node.type === 'rule') {
        prev = tokens[i - 1];
        next = tokens[i + 1];

        if (prev[0] !== 'space' && next[0] !== 'space' && pattern.test(prev[1]) && pattern.test(next[1])) {
          value += token[1];
        } else {
          clean = false;
        }

        continue;
      }

      if (type === 'comment' || type === 'space' && i === length - 1) {
        clean = false;
      } else {
        value += token[1];
      }
    }

    if (!clean) {
      var raw = tokens.reduce(function (all, i) {
        return all + i[1];
      }, '');
      node.raws[prop] = {
        value: value,
        raw: raw
      };
    }

    node[prop] = value;
  };

  _proto.spacesAndCommentsFromEnd = function spacesAndCommentsFromEnd(tokens) {
    var lastTokenType;
    var spaces = '';

    while (tokens.length) {
      lastTokenType = tokens[tokens.length - 1][0];
      if (lastTokenType !== 'space' && lastTokenType !== 'comment') break;
      spaces = tokens.pop()[1] + spaces;
    }

    return spaces;
  };

  _proto.spacesAndCommentsFromStart = function spacesAndCommentsFromStart(tokens) {
    var next;
    var spaces = '';

    while (tokens.length) {
      next = tokens[0][0];
      if (next !== 'space' && next !== 'comment') break;
      spaces += tokens.shift()[1];
    }

    return spaces;
  };

  _proto.spacesFromEnd = function spacesFromEnd(tokens) {
    var lastTokenType;
    var spaces = '';

    while (tokens.length) {
      lastTokenType = tokens[tokens.length - 1][0];
      if (lastTokenType !== 'space') break;
      spaces = tokens.pop()[1] + spaces;
    }

    return spaces;
  };

  _proto.stringFrom = function stringFrom(tokens, from) {
    var result = '';

    for (var i = from; i < tokens.length; i++) {
      result += tokens[i][1];
    }

    tokens.splice(from, tokens.length - from);
    return result;
  };

  _proto.colon = function colon(tokens) {
    var brackets = 0;
    var token, type, prev;

    for (var i = 0; i < tokens.length; i++) {
      token = tokens[i];
      type = token[0];

      if (type === '(') {
        brackets += 1;
      }

      if (type === ')') {
        brackets -= 1;
      }

      if (brackets === 0 && type === ':') {
        if (!prev) {
          this.doubleColon(token);
        } else if (prev[0] === 'word' && prev[1] === 'progid') {
          continue;
        } else {
          return i;
        }
      }

      prev = token;
    }

    return false;
  } // Errors
  ;

  _proto.unclosedBracket = function unclosedBracket(bracket) {
    throw this.input.error('Unclosed bracket', bracket[2], bracket[3]);
  };

  _proto.unknownWord = function unknownWord(tokens) {
    throw this.input.error('Unknown word', tokens[0][2], tokens[0][3]);
  };

  _proto.unexpectedClose = function unexpectedClose(token) {
    throw this.input.error('Unexpected }', token[2], token[3]);
  };

  _proto.unclosedBlock = function unclosedBlock() {
    var pos = this.current.source.start;
    throw this.input.error('Unclosed block', pos.line, pos.column);
  };

  _proto.doubleColon = function doubleColon(token) {
    throw this.input.error('Double colon', token[2], token[3]);
  };

  _proto.unnamedAtrule = function unnamedAtrule(node, token) {
    throw this.input.error('At-rule without name', token[2], token[3]);
  };

  _proto.precheckMissedSemicolon = function precheckMissedSemicolon()
  /* tokens */
  {// Hook for Safe Parser
  };

  _proto.checkMissedSemicolon = function checkMissedSemicolon(tokens) {
    var colon = this.colon(tokens);
    if (colon === false) return;
    var founded = 0;
    var token;

    for (var j = colon - 1; j >= 0; j--) {
      token = tokens[j];

      if (token[0] !== 'space') {
        founded += 1;
        if (founded === 2) break;
      }
    }

    throw this.input.error('Missed semicolon', token[2], token[3]);
  };

  return Parser;
}();

exports.default = Parser;
module.exports = exports.default;
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