first commit

build/node_modules/css-tree/lib/lexer/error.js

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+'use strict';
+
+var createCustomError = require('../utils/createCustomError');
+var translateGrammar = require('./grammar/translate');
+
+function getLocation(node, point) {
+    var loc = node && node.loc && node.loc[point];
+
+    return loc
+        ? { offset: loc.offset,
+            line: loc.line,
+            column: loc.column }
+        : null;
+}
+
+var SyntaxReferenceError = function(type, referenceName) {
+    var error = createCustomError('SyntaxReferenceError', type + ' `' + referenceName + '`');
+
+    error.reference = referenceName;
+
+    return error;
+};
+
+var MatchError = function(message, lexer, syntax, value, badNode) {
+    var error = createCustomError('SyntaxMatchError', message);
+    var errorOffset = -1;
+    var start = getLocation(badNode, 'start');
+    var end = getLocation(badNode, 'end');
+    var css = lexer.syntax.translateMarkup(value, function(node, buffer) {
+        if (node === badNode) {
+            errorOffset = buffer.length;
+        }
+    });
+
+    if (errorOffset === -1) {
+        errorOffset = css.length;
+    }
+
+    error.rawMessage = message;
+    error.syntax = syntax ? translateGrammar(syntax) : '<generic>';
+    error.css = css;
+    error.mismatchOffset = errorOffset;
+    error.loc = {
+        source: badNode && badNode.loc && badNode.loc.source || '<unknown>',
+        start: start,
+        end: end
+    };
+    error.line = start ? start.line : undefined;
+    error.column = start ? start.column : undefined;
+    error.offset = start ? start.offset : undefined;
+    error.message = message + '\n' +
+        '  syntax: ' + error.syntax + '\n' +
+        '   value: ' + (error.css || '<empty string>') + '\n' +
+        '  --------' + new Array(error.mismatchOffset + 1).join('-') + '^';
+
+    return error;
+};
+
+module.exports = {
+    SyntaxReferenceError: SyntaxReferenceError,
+    MatchError: MatchError
+};