public override void VisitObjectExpression(JsObjectExpression node)
{
if (!node.Items.Any())
{
output.Append("{}");
}
else
{
output.AppendLine("{");
output.CurrentIndentLevel++;
for (var i = 0; i < node.Items.Count; i++)
{
var item = node.Items[i];
item.Accept(this);
if (i < node.Items.Count - 1)
{
output.Append(",");
}
output.AppendLine();
}
output.CurrentIndentLevel--;
output.Append("}");
}
}
public virtual void Visit(JsObjectExpression node)
{
DefaultVisit(node);
foreach (var item in node.Items)
{
item.Accept(this);
}
}
public void JsFormatter_ObjectExpression()
{
var expr = new JsObjectExpression(
new JsObjectProperty("a", new JsObjectExpression(new JsObjectProperty("c", new JsLiteral(2)))),
new JsObjectProperty("baa", new JsLiteral(null)));
Assert.AreEqual("{a:{c:2},baa:null}", expr.FormatScript());
Assert.AreEqual("{\n\ta: {c: 2},\n\tbaa: null\n}", expr.FormatScript(niceMode: true));
}
public virtual JsNode Visit(JsObjectExpression node)
{
return(DefaultVisit(node, x =>
{
for (var i = 0; i < x.Items.Count; i++)
{
x.Items[i] = (JsObjectItem)x.Items[i].Accept(this);
}
return x;
}));
}
private static string GenerateHandlerOptions(DotvvmBindableObject handler, Dictionary <string, object> options)
{
JsExpression optionsExpr = new JsObjectExpression(
options.Where(o => o.Value != null).Select(o => new JsObjectProperty(o.Key, TransformOptionValueToExpression(handler, o.Value)))
);
if (options.Any(o => o.Value is IValueBinding))
{
optionsExpr = new JsFunctionExpression(
new[] { new JsIdentifier("c"), new JsIdentifier("d") },
new JsBlockStatement(new JsReturnStatement(optionsExpr))
);
}
optionsExpr.FixParenthesis();
var script = new JsFormattingVisitor().ApplyAction(optionsExpr.AcceptVisitor).GetParameterlessResult();
return(script);
}
public static StringSegment ParseJsToken(this StringSegment literal, out JsToken token, bool filterExpression)
{
literal = literal.AdvancePastWhitespace();
if (literal.IsNullOrEmpty())
{
token = null;
return(literal);
}
var c = literal.GetChar(0);
if (c == '(')
{
literal = literal.Advance(1);
literal = literal.ParseJsExpression(out var bracketsExpr);
literal = literal.AdvancePastWhitespace();
c = literal.GetChar(0);
if (c == ')')
{
literal = literal.Advance(1);
token = bracketsExpr;
return(literal);
}
throw new SyntaxErrorException($"Expected ')' but instead found '{c}': {literal.SubstringWithElipsis(0, 50)}");
}
token = null;
c = (char)0;
if (literal.IsNullOrEmpty())
{
return(TypeConstants.EmptyStringSegment);
}
var i = 0;
literal = literal.AdvancePastWhitespace();
var firstChar = literal.GetChar(0);
if (firstChar == '\'' || firstChar == '"' || firstChar == '`' || firstChar == '′')
{
i = 1;
var hasEscapeChar = false;
while (i < literal.Length && ((c = literal.GetChar(i)) != firstChar || literal.GetChar(i - 1) == '\\'))
{
i++;
if (!hasEscapeChar)
{
hasEscapeChar = c == '\\';
}
}
if (i >= literal.Length || literal.GetChar(i) != firstChar)
{
throw new SyntaxErrorException($"Unterminated string literal: {literal}");
}
var str = literal.Substring(1, i - 1);
token = new JsLiteral(str);
if (hasEscapeChar)
{
var sb = StringBuilderCache.Allocate();
for (var j = 0; j < str.Length; j++)
{
// strip the back-slash used to escape quote char in strings
var ch = str[j];
if (ch != '\\' || (j + 1 >= str.Length || str[j + 1] != firstChar))
{
sb.Append(ch);
}
}
token = new JsLiteral(StringBuilderCache.ReturnAndFree(sb));
}
return(literal.Advance(i + 1));
}
if (firstChar >= '0' && firstChar <= '9')
{
i = 1;
var hasExponent = false;
var hasDecimal = false;
while (i < literal.Length && IsNumericChar(c = literal.GetChar(i)) ||
(hasExponent = (c == 'e' || c == 'E')))
{
if (c == '.')
{
hasDecimal = true;
}
i++;
if (hasExponent)
{
i += 2; // [e+1]0
while (i < literal.Length && IsNumericChar(literal.GetChar(i)))
{
i++;
}
break;
}
}
var numLiteral = literal.Subsegment(0, i);
//don't convert into ternary to avoid Type coercion
if (hasDecimal || hasExponent)
{
token = new JsLiteral(numLiteral.TryParseDouble(out double d) ? d : default(double));
}
else
{
token = new JsLiteral(numLiteral.ParseSignedInteger());
}
return(literal.Advance(i));
}
if (firstChar == '{')
{
var props = new List <JsProperty>();
literal = literal.Advance(1);
while (!literal.IsNullOrEmpty())
{
literal = literal.AdvancePastWhitespace();
if (literal.GetChar(0) == '}')
{
literal = literal.Advance(1);
break;
}
literal = literal.ParseJsToken(out var mapKeyToken);
if (!(mapKeyToken is JsLiteral) && !(mapKeyToken is JsIdentifier))
{
throw new SyntaxErrorException($"'{mapKeyToken}' is not a valid Object key, expected literal or identifier.");
}
JsToken mapValueToken;
bool shorthand = false;
literal = literal.AdvancePastWhitespace();
if (literal.Length > 0 && literal.GetChar(0) == ':')
{
literal = literal.Advance(1);
literal = literal.ParseJsExpression(out mapValueToken);
}
else
{
shorthand = true;
if (literal.Length == 0 || (c = literal.GetChar(0)) != ',' && c != '}')
{
throw new SyntaxErrorException($"Unterminated object literal near: {literal.SubstringWithElipsis(0, 50)}");
}
mapValueToken = mapKeyToken;
}
props.Add(new JsProperty(mapKeyToken, mapValueToken, shorthand));
literal = literal.AdvancePastWhitespace();
if (literal.IsNullOrEmpty())
{
break;
}
if (literal.GetChar(0) == '}')
{
literal = literal.Advance(1);
break;
}
literal = literal.AdvancePastChar(',');
literal = literal.AdvancePastWhitespace();
}
token = new JsObjectExpression(props);
return(literal);
}
if (firstChar == '[')
{
literal = literal.ParseArguments(out var elements, termination: ']');
token = new JsArrayExpression(elements);
return(literal);
}
if (firstChar.IsOperatorChar())
{
if (literal.StartsWith(">="))
{
token = JsGreaterThanEqual.Operator;
return(literal.Advance(2));
}
if (literal.StartsWith("<="))
{
token = JsLessThanEqual.Operator;
return(literal.Advance(2));
}
if (literal.StartsWith("!=="))
{
token = JsStrictNotEquals.Operator;
return(literal.Advance(3));
}
if (literal.StartsWith("!="))
{
token = JsNotEquals.Operator;
return(literal.Advance(2));
}
if (literal.StartsWith("==="))
{
token = JsStrictEquals.Operator;
return(literal.Advance(3));
}
if (literal.StartsWith("=="))
{
token = JsEquals.Operator;
return(literal.Advance(2));
}
if (literal.StartsWith("||"))
{
token = JsOr.Operator;
return(literal.Advance(2));
}
if (literal.StartsWith("&&"))
{
token = JsAnd.Operator;
return(literal.Advance(2));
}
if (literal.StartsWith("<<"))
{
token = JsBitwiseLeftShift.Operator;
return(literal.Advance(2));
}
if (literal.StartsWith(">>"))
{
token = JsBitwiseRightShift.Operator;
return(literal.Advance(2));
}
switch (firstChar)
{
case '>':
token = JsGreaterThan.Operator;
return(literal.Advance(1));
case '<':
token = JsLessThan.Operator;
return(literal.Advance(1));
case '=':
token = JsAssignment.Operator;
return(literal.Advance(1));
case '!':
token = JsNot.Operator;
return(literal.Advance(1));
case '+':
token = JsAddition.Operator;
return(literal.Advance(1));
case '-':
token = JsSubtraction.Operator;
return(literal.Advance(1));
case '*':
token = JsMultiplication.Operator;
return(literal.Advance(1));
case '/':
token = JsDivision.Operator;
return(literal.Advance(1));
case '&':
token = JsBitwiseAnd.Operator;
return(literal.Advance(1));
case '|':
token = JsBitwiseOr.Operator;
return(literal.Advance(1));
case '^':
token = JsBitwiseXOr.Operator;
return(literal.Advance(1));
case '%':
token = JsMod.Operator;
return(literal.Advance(1));
default:
throw new SyntaxErrorException($"Invalid Operator found near: '{literal.SubstringWithElipsis(0, 50)}'");
}
}
// identifier
var preIdentifierLiteral = literal;
literal = literal.ParseIdentifier(out var node);
literal = literal.AdvancePastWhitespace();
if (!literal.IsNullOrEmpty())
{
c = literal.GetChar(i);
if (c == '.' || c == '[')
{
while (true)
{
literal = literal.Advance(1);
if (c == '.')
{
literal = literal.AdvancePastWhitespace();
literal = literal.ParseIdentifier(out var property);
node = new JsMemberExpression(node, property, computed: false);
}
else if (c == '[')
{
literal = literal.AdvancePastWhitespace();
literal = literal.ParseJsExpression(out var property);
node = new JsMemberExpression(node, property, computed: true);
literal = literal.AdvancePastWhitespace();
if (literal.IsNullOrEmpty() || literal.GetChar(0) != ']')
{
throw new SyntaxErrorException($"Expected ']' but was '{literal.GetChar(0)}'");
}
literal = literal.Advance(1);
}
literal = literal.AdvancePastWhitespace();
if (literal.IsNullOrWhiteSpace())
{
break;
}
c = literal.GetChar(0);
if (c == '(')
{
throw new SyntaxErrorException("Call expression found on member expression. Only filters can be invoked.");
}
if (!(c == '.' || c == '['))
{
break;
}
}
}
else if (c == '(' || (filterExpression && c == ':'))
{
literal = preIdentifierLiteral.ParseJsCallExpression(out var callExpr, filterExpression: filterExpression);
token = callExpr;
return(literal);
}
}
token = node;
return(literal);
}
public virtual void VisitObjectExpression(JsObjectExpression node)
{
}
public void Visit(JsObjectExpression node)
{
BeforeVisit(node);
DefaultVisit(node, VisitObjectExpression);
AfterVisit(node);
}
