glance-selector/lib/parser.js

Glance selector library

/*
 * Generated by PEG.js 0.10.0.
 *
 * http://pegjs.org/
 */

"use strict";

function peg$subclass(child, parent) {
  function ctor() {
    this.constructor = child;
  }
  ctor.prototype = parent.prototype;
  child.prototype = new ctor();
}

function peg$SyntaxError(message, expected, found, location) {
  this.message = message;
  this.expected = expected;
  this.found = found;
  this.location = location;
  this.name = "SyntaxError";

  if (typeof Error.captureStackTrace === "function") {
    Error.captureStackTrace(this, peg$SyntaxError);
  }
}

peg$subclass(peg$SyntaxError, Error);

peg$SyntaxError.buildMessage = function (expected, found) {
  var DESCRIBE_EXPECTATION_FNS = {
    literal: function literal(expectation) {
      return "\"" + literalEscape(expectation.text) + "\"";
    },

    "class": function _class(expectation) {
      var escapedParts = "",
          i;

      for (i = 0; i < expectation.parts.length; i++) {
        escapedParts += expectation.parts[i] instanceof Array ? classEscape(expectation.parts[i][0]) + "-" + classEscape(expectation.parts[i][1]) : classEscape(expectation.parts[i]);
      }

      return "[" + (expectation.inverted ? "^" : "") + escapedParts + "]";
    },

    any: function any(expectation) {
      return "any character";
    },

    end: function end(expectation) {
      return "end of input";
    },

    other: function other(expectation) {
      return expectation.description;
    }
  };

  function hex(ch) {
    return ch.charCodeAt(0).toString(16).toUpperCase();
  }

  function literalEscape(s) {
    return s.replace(/\\/g, '\\\\').replace(/"/g, '\\"').replace(/\0/g, '\\0').replace(/\t/g, '\\t').replace(/\n/g, '\\n').replace(/\r/g, '\\r').replace(/[\x00-\x0F]/g, function (ch) {
      return '\\x0' + hex(ch);
    }).replace(/[\x10-\x1F\x7F-\x9F]/g, function (ch) {
      return '\\x' + hex(ch);
    });
  }

  function classEscape(s) {
    return s.replace(/\\/g, '\\\\').replace(/\]/g, '\\]').replace(/\^/g, '\\^').replace(/-/g, '\\-').replace(/\0/g, '\\0').replace(/\t/g, '\\t').replace(/\n/g, '\\n').replace(/\r/g, '\\r').replace(/[\x00-\x0F]/g, function (ch) {
      return '\\x0' + hex(ch);
    }).replace(/[\x10-\x1F\x7F-\x9F]/g, function (ch) {
      return '\\x' + hex(ch);
    });
  }

  function describeExpectation(expectation) {
    return DESCRIBE_EXPECTATION_FNS[expectation.type](expectation);
  }

  function describeExpected(expected) {
    var descriptions = new Array(expected.length),
        i,
        j;

    for (i = 0; i < expected.length; i++) {
      descriptions[i] = describeExpectation(expected[i]);
    }

    descriptions.sort();

    if (descriptions.length > 0) {
      for (i = 1, j = 1; i < descriptions.length; i++) {
        if (descriptions[i - 1] !== descriptions[i]) {
          descriptions[j] = descriptions[i];
          j++;
        }
      }
      descriptions.length = j;
    }

    switch (descriptions.length) {
      case 1:
        return descriptions[0];

      case 2:
        return descriptions[0] + " or " + descriptions[1];

      default:
        return descriptions.slice(0, -1).join(", ") + ", or " + descriptions[descriptions.length - 1];
    }
  }

  function describeFound(found) {
    return found ? "\"" + literalEscape(found) + "\"" : "end of input";
  }

  return "Expected " + describeExpected(expected) + " but " + describeFound(found) + " found.";
};

function peg$parse(input, options) {
  options = options !== void 0 ? options : {};

  var peg$FAILED = {},
      peg$startRuleFunctions = { Start: peg$parseStart },
      peg$startRuleFunction = peg$parseStart,
      peg$c0 = function peg$c0(references) {
    return references;
  },
      peg$c1 = ">",
      peg$c2 = peg$literalExpectation(">", false),
      peg$c3 = "^",
      peg$c4 = peg$literalExpectation("^", false),
      peg$c5 = "#",
      peg$c6 = peg$literalExpectation("#", false),
      peg$c7 = ",",
      peg$c8 = peg$literalExpectation(",", false),
      peg$c9 = ":",
      peg$c10 = peg$literalExpectation(":", false),
      peg$c11 = "\\",
      peg$c12 = peg$literalExpectation("\\", false),
      peg$c13 = function peg$c13(c) {
    return c;
  },
      peg$c14 = function peg$c14(target) {
    scopeIndex++;
    scope += text();
    target.type = "scope";
    return target;
  },
      peg$c15 = function peg$c15(target) {
    scopeIndex++;
    scope += text();
    target.type = "intersect";
    return target;
  },
      peg$c16 = function peg$c16(target) {
    scopeIndex++;
    scope += text();
    target.type = "target";
    return target;
  },
      peg$c17 = function peg$c17(label) {
    return label;
  },
      peg$c18 = function peg$c18(label, properties, transforms) {
    return {
      label: label.join('').trim(),
      properties: properties || [],
      transforms: transforms || [],
      scope: scope.slice(0, -1).trim(),
      scopeIndex: scopeIndex,
      path: (scope + text()).trim()
    };
  },
      peg$c19 = peg$anyExpectation(),
      peg$c20 = function peg$c20(c) {
    return c;
  },
      peg$c21 = function peg$c21(properties) {
    return properties;
  },
      peg$c22 = function peg$c22(name) {
    return tryParseInt(name.join("").trim());
  },
      peg$c23 = function peg$c23(transforms) {
    return transforms;
  },
      peg$c24 = function peg$c24(name) {
    return name.join("").trim();
  },
      peg$c25 = /^[ \t\r\n]/,
      peg$c26 = peg$classExpectation([" ", "\t", "\r", "\n"], false, false),
      peg$currPos = 0,
      peg$savedPos = 0,
      peg$posDetailsCache = [{ line: 1, column: 1 }],
      peg$maxFailPos = 0,
      peg$maxFailExpected = [],
      peg$silentFails = 0,
      peg$result;

  if ("startRule" in options) {
    if (!(options.startRule in peg$startRuleFunctions)) {
      throw new Error("Can't start parsing from rule \"" + options.startRule + "\".");
    }

    peg$startRuleFunction = peg$startRuleFunctions[options.startRule];
  }

  function text() {
    return input.substring(peg$savedPos, peg$currPos);
  }

  function location() {
    return peg$computeLocation(peg$savedPos, peg$currPos);
  }

  function expected(description, location) {
    location = location !== void 0 ? location : peg$computeLocation(peg$savedPos, peg$currPos);

    throw peg$buildStructuredError([peg$otherExpectation(description)], input.substring(peg$savedPos, peg$currPos), location);
  }

  function error(message, location) {
    location = location !== void 0 ? location : peg$computeLocation(peg$savedPos, peg$currPos);

    throw peg$buildSimpleError(message, location);
  }

  function peg$literalExpectation(text, ignoreCase) {
    return { type: "literal", text: text, ignoreCase: ignoreCase };
  }

  function peg$classExpectation(parts, inverted, ignoreCase) {
    return { type: "class", parts: parts, inverted: inverted, ignoreCase: ignoreCase };
  }

  function peg$anyExpectation() {
    return { type: "any" };
  }

  function peg$endExpectation() {
    return { type: "end" };
  }

  function peg$otherExpectation(description) {
    return { type: "other", description: description };
  }

  function peg$computePosDetails(pos) {
    var details = peg$posDetailsCache[pos],
        p;

    if (details) {
      return details;
    } else {
      p = pos - 1;
      while (!peg$posDetailsCache[p]) {
        p--;
      }

      details = peg$posDetailsCache[p];
      details = {
        line: details.line,
        column: details.column
      };

      while (p < pos) {
        if (input.charCodeAt(p) === 10) {
          details.line++;
          details.column = 1;
        } else {
          details.column++;
        }

        p++;
      }

      peg$posDetailsCache[pos] = details;
      return details;
    }
  }

  function peg$computeLocation(startPos, endPos) {
    var startPosDetails = peg$computePosDetails(startPos),
        endPosDetails = peg$computePosDetails(endPos);

    return {
      start: {
        offset: startPos,
        line: startPosDetails.line,
        column: startPosDetails.column
      },
      end: {
        offset: endPos,
        line: endPosDetails.line,
        column: endPosDetails.column
      }
    };
  }

  function peg$fail(expected) {
    if (peg$currPos < peg$maxFailPos) {
      return;
    }

    if (peg$currPos > peg$maxFailPos) {
      peg$maxFailPos = peg$currPos;
      peg$maxFailExpected = [];
    }

    peg$maxFailExpected.push(expected);
  }

  function peg$buildSimpleError(message, location) {
    return new peg$SyntaxError(message, null, null, location);
  }

  function peg$buildStructuredError(expected, found, location) {
    return new peg$SyntaxError(peg$SyntaxError.buildMessage(expected, found), expected, found, location);
  }

  function peg$parseStart() {
    var s0, s1, s2;

    s0 = peg$currPos;
    s1 = [];
    s2 = peg$parseReference();
    while (s2 !== peg$FAILED) {
      s1.push(s2);
      s2 = peg$parseReference();
    }
    if (s1 !== peg$FAILED) {
      peg$savedPos = s0;
      s1 = peg$c0(s1);
    }
    s0 = s1;

    return s0;
  }

  function peg$parseScopeChar() {
    var s0;

    if (input.charCodeAt(peg$currPos) === 62) {
      s0 = peg$c1;
      peg$currPos++;
    } else {
      s0 = peg$FAILED;
      if (peg$silentFails === 0) {
        peg$fail(peg$c2);
      }
    }

    return s0;
  }

  function peg$parseIntersectChar() {
    var s0;

    if (input.charCodeAt(peg$currPos) === 94) {
      s0 = peg$c3;
      peg$currPos++;
    } else {
      s0 = peg$FAILED;
      if (peg$silentFails === 0) {
        peg$fail(peg$c4);
      }
    }

    return s0;
  }

  function peg$parsePropertyChar() {
    var s0;

    if (input.charCodeAt(peg$currPos) === 35) {
      s0 = peg$c5;
      peg$currPos++;
    } else {
      s0 = peg$FAILED;
      if (peg$silentFails === 0) {
        peg$fail(peg$c6);
      }
    }

    return s0;
  }

  function peg$parseSeparatorChar() {
    var s0;

    if (input.charCodeAt(peg$currPos) === 44) {
      s0 = peg$c7;
      peg$currPos++;
    } else {
      s0 = peg$FAILED;
      if (peg$silentFails === 0) {
        peg$fail(peg$c8);
      }
    }

    return s0;
  }

  function peg$parseTransformChar() {
    var s0;

    if (input.charCodeAt(peg$currPos) === 58) {
      s0 = peg$c9;
      peg$currPos++;
    } else {
      s0 = peg$FAILED;
      if (peg$silentFails === 0) {
        peg$fail(peg$c10);
      }
    }

    return s0;
  }

  function peg$parseEscapeChar() {
    var s0;

    if (input.charCodeAt(peg$currPos) === 92) {
      s0 = peg$c11;
      peg$currPos++;
    } else {
      s0 = peg$FAILED;
      if (peg$silentFails === 0) {
        peg$fail(peg$c12);
      }
    }

    return s0;
  }

  function peg$parseEscapableChars() {
    var s0;

    s0 = peg$parseEscapeChar();
    if (s0 === peg$FAILED) {
      s0 = peg$parseScopeChar();
      if (s0 === peg$FAILED) {
        s0 = peg$parseTransformChar();
        if (s0 === peg$FAILED) {
          s0 = peg$parsePropertyChar();
          if (s0 === peg$FAILED) {
            s0 = peg$parseIntersectChar();
          }
        }
      }
    }

    return s0;
  }

  function peg$parseEscapedSequence() {
    var s0, s1, s2;

    s0 = peg$currPos;
    s1 = peg$parseEscapeChar();
    if (s1 !== peg$FAILED) {
      s2 = peg$parseEscapableChars();
      if (s2 !== peg$FAILED) {
        peg$savedPos = s0;
        s1 = peg$c13(s2);
        s0 = s1;
      } else {
        peg$currPos = s0;
        s0 = peg$FAILED;
      }
    } else {
      peg$currPos = s0;
      s0 = peg$FAILED;
    }

    return s0;
  }

  function peg$parseReference() {
    var s0, s1, s2;

    s0 = peg$currPos;
    s1 = peg$parseTarget();
    if (s1 !== peg$FAILED) {
      s2 = peg$parseScopeChar();
      if (s2 !== peg$FAILED) {
        peg$savedPos = s0;
        s1 = peg$c14(s1);
        s0 = s1;
      } else {
        peg$currPos = s0;
        s0 = peg$FAILED;
      }
    } else {
      peg$currPos = s0;
      s0 = peg$FAILED;
    }
    if (s0 === peg$FAILED) {
      s0 = peg$currPos;
      s1 = peg$parseTarget();
      if (s1 !== peg$FAILED) {
        s2 = peg$parseIntersectChar();
        if (s2 !== peg$FAILED) {
          peg$savedPos = s0;
          s1 = peg$c15(s1);
          s0 = s1;
        } else {
          peg$currPos = s0;
          s0 = peg$FAILED;
        }
      } else {
        peg$currPos = s0;
        s0 = peg$FAILED;
      }
      if (s0 === peg$FAILED) {
        s0 = peg$currPos;
        s1 = peg$parseTarget();
        if (s1 !== peg$FAILED) {
          peg$savedPos = s0;
          s1 = peg$c16(s1);
        }
        s0 = s1;
      }
    }

    return s0;
  }

  function peg$parseTarget() {
    var s0, s1;

    s0 = peg$currPos;
    s1 = peg$parseLabel();
    if (s1 !== peg$FAILED) {
      peg$savedPos = s0;
      s1 = peg$c17(s1);
    }
    s0 = s1;

    return s0;
  }

  function peg$parseLabel() {
    var s0, s1, s2, s3, s4;

    s0 = peg$currPos;
    s1 = [];
    s2 = peg$parseLabelCharacter();
    if (s2 !== peg$FAILED) {
      while (s2 !== peg$FAILED) {
        s1.push(s2);
        s2 = peg$parseLabelCharacter();
      }
    } else {
      s1 = peg$FAILED;
    }
    if (s1 !== peg$FAILED) {
      s2 = peg$parseProperties();
      if (s2 === peg$FAILED) {
        s2 = null;
      }
      if (s2 !== peg$FAILED) {
        s3 = peg$parseTransforms();
        if (s3 === peg$FAILED) {
          s3 = null;
        }
        if (s3 !== peg$FAILED) {
          s4 = peg$parseWhitespace();
          if (s4 === peg$FAILED) {
            s4 = null;
          }
          if (s4 !== peg$FAILED) {
            peg$savedPos = s0;
            s1 = peg$c18(s1, s2, s3);
            s0 = s1;
          } else {
            peg$currPos = s0;
            s0 = peg$FAILED;
          }
        } else {
          peg$currPos = s0;
          s0 = peg$FAILED;
        }
      } else {
        peg$currPos = s0;
        s0 = peg$FAILED;
      }
    } else {
      peg$currPos = s0;
      s0 = peg$FAILED;
    }

    return s0;
  }

  function peg$parseLabelCharacter() {
    var s0, s1, s2;

    s0 = peg$currPos;
    s1 = peg$currPos;
    peg$silentFails++;
    s2 = peg$parseEscapableChars();
    peg$silentFails--;
    if (s2 === peg$FAILED) {
      s1 = void 0;
    } else {
      peg$currPos = s1;
      s1 = peg$FAILED;
    }
    if (s1 !== peg$FAILED) {
      if (input.length > peg$currPos) {
        s2 = input.charAt(peg$currPos);
        peg$currPos++;
      } else {
        s2 = peg$FAILED;
        if (peg$silentFails === 0) {
          peg$fail(peg$c19);
        }
      }
      if (s2 !== peg$FAILED) {
        peg$savedPos = s0;
        s1 = peg$c20(s2);
        s0 = s1;
      } else {
        peg$currPos = s0;
        s0 = peg$FAILED;
      }
    } else {
      peg$currPos = s0;
      s0 = peg$FAILED;
    }
    if (s0 === peg$FAILED) {
      s0 = peg$parseEscapedSequence();
    }

    return s0;
  }

  function peg$parseProperties() {
    var s0, s1, s2, s3;

    s0 = peg$currPos;
    s1 = peg$parsePropertyChar();
    if (s1 !== peg$FAILED) {
      s2 = [];
      s3 = peg$parseProperty();
      while (s3 !== peg$FAILED) {
        s2.push(s3);
        s3 = peg$parseProperty();
      }
      if (s2 !== peg$FAILED) {
        peg$savedPos = s0;
        s1 = peg$c21(s2);
        s0 = s1;
      } else {
        peg$currPos = s0;
        s0 = peg$FAILED;
      }
    } else {
      peg$currPos = s0;
      s0 = peg$FAILED;
    }

    return s0;
  }

  function peg$parseProperty() {
    var s0, s1, s2;

    s0 = peg$currPos;
    s1 = [];
    s2 = peg$parseCharacter();
    if (s2 !== peg$FAILED) {
      while (s2 !== peg$FAILED) {
        s1.push(s2);
        s2 = peg$parseCharacter();
      }
    } else {
      s1 = peg$FAILED;
    }
    if (s1 !== peg$FAILED) {
      s2 = peg$parseSeparatorChar();
      if (s2 === peg$FAILED) {
        s2 = null;
      }
      if (s2 !== peg$FAILED) {
        peg$savedPos = s0;
        s1 = peg$c22(s1);
        s0 = s1;
      } else {
        peg$currPos = s0;
        s0 = peg$FAILED;
      }
    } else {
      peg$currPos = s0;
      s0 = peg$FAILED;
    }

    return s0;
  }

  function peg$parseTransforms() {
    var s0, s1, s2, s3;

    s0 = peg$currPos;
    s1 = peg$parseTransformChar();
    if (s1 !== peg$FAILED) {
      s2 = [];
      s3 = peg$parseTransform();
      while (s3 !== peg$FAILED) {
        s2.push(s3);
        s3 = peg$parseTransform();
      }
      if (s2 !== peg$FAILED) {
        peg$savedPos = s0;
        s1 = peg$c23(s2);
        s0 = s1;
      } else {
        peg$currPos = s0;
        s0 = peg$FAILED;
      }
    } else {
      peg$currPos = s0;
      s0 = peg$FAILED;
    }

    return s0;
  }

  function peg$parseTransform() {
    var s0, s1, s2;

    s0 = peg$currPos;
    s1 = [];
    s2 = peg$parseCharacter();
    if (s2 !== peg$FAILED) {
      while (s2 !== peg$FAILED) {
        s1.push(s2);
        s2 = peg$parseCharacter();
      }
    } else {
      s1 = peg$FAILED;
    }
    if (s1 !== peg$FAILED) {
      s2 = peg$parseSeparatorChar();
      if (s2 === peg$FAILED) {
        s2 = null;
      }
      if (s2 !== peg$FAILED) {
        peg$savedPos = s0;
        s1 = peg$c24(s1);
        s0 = s1;
      } else {
        peg$currPos = s0;
        s0 = peg$FAILED;
      }
    } else {
      peg$currPos = s0;
      s0 = peg$FAILED;
    }

    return s0;
  }

  function peg$parseCharacter() {
    var s0, s1, s2;

    s0 = peg$currPos;
    s1 = peg$currPos;
    peg$silentFails++;
    s2 = peg$parseEscapableChars();
    if (s2 === peg$FAILED) {
      s2 = peg$parseSeparatorChar();
    }
    peg$silentFails--;
    if (s2 === peg$FAILED) {
      s1 = void 0;
    } else {
      peg$currPos = s1;
      s1 = peg$FAILED;
    }
    if (s1 !== peg$FAILED) {
      if (input.length > peg$currPos) {
        s2 = input.charAt(peg$currPos);
        peg$currPos++;
      } else {
        s2 = peg$FAILED;
        if (peg$silentFails === 0) {
          peg$fail(peg$c19);
        }
      }
      if (s2 !== peg$FAILED) {
        peg$savedPos = s0;
        s1 = peg$c20(s2);
        s0 = s1;
      } else {
        peg$currPos = s0;
        s0 = peg$FAILED;
      }
    } else {
      peg$currPos = s0;
      s0 = peg$FAILED;
    }

    return s0;
  }

  function peg$parseWhitespace() {
    var s0, s1;

    s0 = [];
    if (peg$c25.test(input.charAt(peg$currPos))) {
      s1 = input.charAt(peg$currPos);
      peg$currPos++;
    } else {
      s1 = peg$FAILED;
      if (peg$silentFails === 0) {
        peg$fail(peg$c26);
      }
    }
    if (s1 !== peg$FAILED) {
      while (s1 !== peg$FAILED) {
        s0.push(s1);
        if (peg$c25.test(input.charAt(peg$currPos))) {
          s1 = input.charAt(peg$currPos);
          peg$currPos++;
        } else {
          s1 = peg$FAILED;
          if (peg$silentFails === 0) {
            peg$fail(peg$c26);
          }
        }
      }
    } else {
      s0 = peg$FAILED;
    }

    return s0;
  }

  var scope = "";
  var scopeIndex = 0;

  function tryParseInt(str) {
    if (!isNaN(str)) {
      return parseInt(str);
    }
    return str;
  }

  peg$result = peg$startRuleFunction();

  if (peg$result !== peg$FAILED && peg$currPos === input.length) {
    return peg$result;
  } else {
    if (peg$result !== peg$FAILED && peg$currPos < input.length) {
      peg$fail(peg$endExpectation());
    }

    throw peg$buildStructuredError(peg$maxFailExpected, peg$maxFailPos < input.length ? input.charAt(peg$maxFailPos) : null, peg$maxFailPos < input.length ? peg$computeLocation(peg$maxFailPos, peg$maxFailPos + 1) : peg$computeLocation(peg$maxFailPos, peg$maxFailPos));
  }
}

module.exports = {
  SyntaxError: peg$SyntaxError,
  parse: peg$parse
};