public static Func <ScriptScopeContext, object, object> GetMemberExpression(Type targetType, ReadOnlyMemory <char> expression)
{
if (targetType == null)
{
throw new ArgumentNullException(nameof(targetType));
}
if (expression.IsNullOrWhiteSpace())
{
throw new ArgumentNullException(nameof(expression));
}
var key = targetType.FullName + ':' + expression;
if (BinderCache.TryGetValue(key, out var fn))
{
return(fn);
}
BinderCache[key] = fn = Compile(targetType, expression);
return(fn);
}
public Action <ScriptScopeContext, object, object> GetAssignExpression(Type targetType, ReadOnlyMemory <char> expression)
{
if (targetType == null)
{
throw new ArgumentNullException(nameof(targetType));
}
if (expression.IsNullOrWhiteSpace())
{
throw new ArgumentNullException(nameof(expression));
}
var key = targetType.FullName + ':' + expression;
if (AssignExpressionCache.TryGetValue(key, out var fn))
{
return(fn);
}
AssignExpressionCache[key] = fn = SharpPageUtils.CompileAssign(targetType, expression);
return(fn);
}
public static List <PageFragment> ParseTemplatePage(ReadOnlyMemory <char> text)
{
var to = new List <PageFragment>();
if (text.IsNullOrWhiteSpace())
{
return(to);
}
int pos;
var lastPos = 0;
while ((pos = text.IndexOf("{{", lastPos)) != -1)
{
var block = text.Slice(lastPos, pos - lastPos);
if (!block.IsNullOrEmpty())
{
to.Add(new PageStringFragment(block));
}
var varStartPos = pos + 2;
var firstChar = text.Span[varStartPos];
if (firstChar == '*') //comment
{
lastPos = text.IndexOf("*}}", varStartPos) + 3;
}
else if (firstChar == '#') //block statement
{
var literal = text.Slice(varStartPos + 1);
literal = literal.ParseVarName(out var blockNameSpan);
var blockName = blockNameSpan.ToString();
var endExprPos = literal.IndexOf("}}");
if (endExprPos == -1)
{
throw new SyntaxErrorException($"Unterminated '{blockName}' block expression, near '{literal.DebugLiteral()}'");
}
var blockExpr = literal.Slice(0, endExprPos).Trim();
literal = literal.Advance(endExprPos + 2);
if (!ScriptConfig.DontEvaluateBlocksNamed.Contains(blockName))
{
literal = literal.ParseStatementBody(blockNameSpan, out var body);
var elseStatements = new List <PageElseBlock>();
while (literal.StartsWith("{{else"))
{
literal = literal.ParseElseStatement(blockName, out var elseStatement);
elseStatements.Add(elseStatement);
}
literal = literal.Advance(2 + 1 + blockName.Length + 2);
//remove new line after partial block end tag
literal = literal.TrimFirstNewLine();
var length = text.Length - pos - literal.Length;
var originalText = text.Slice(pos, length);
lastPos = pos + length;
var statement = new PageBlockFragment(originalText, blockName, blockExpr, body, elseStatements);
to.Add(statement);
}
else
{
var endBlock = "{{/" + blockName + "}}";
var endBlockPos = literal.IndexOf(endBlock);
if (endBlockPos == -1)
{
throw new SyntaxErrorException($"Unterminated end block '{endBlock}'");
}
var endBlockBody = literal.Slice(0, endBlockPos);
literal = literal.Advance(endBlockPos + endBlock.Length).TrimFirstNewLine();
var body = new List <PageFragment> {
new PageStringFragment(endBlockBody)
};
var length = text.Length - pos - literal.Length;
var originalText = text.Slice(pos, length);
lastPos = pos + length;
var statement = new PageBlockFragment(originalText, blockName, blockExpr, body);
to.Add(statement);
}
}
else
{
var literal = text.Slice(varStartPos).Span;
literal = literal.ParseJsExpression(out var expr, filterExpression: true);
var filters = new List <JsCallExpression>();
if (!literal.StartsWith("}}"))
{
literal = literal.AdvancePastWhitespace();
if (literal.FirstCharEquals(FilterSep))
{
literal = literal.Advance(1);
while (true)
{
literal = literal.ParseJsCallExpression(out var filter, filterExpression: true);
filters.Add(filter);
literal = literal.AdvancePastWhitespace();
if (literal.IsNullOrEmpty())
{
throw new SyntaxErrorException("Unterminated filter expression");
}
if (literal.StartsWith("}}"))
{
literal = literal.Advance(2);
break;
}
if (!literal.FirstCharEquals(FilterSep))
{
throw new SyntaxErrorException(
$"Expected filter separator '|' but was {literal.DebugFirstChar()}");
}
literal = literal.Advance(1);
}
}
else
{
if (!literal.IsNullOrEmpty())
{
literal = literal.Advance(1);
}
}
}
else
{
literal = literal.Advance(2);
}
var length = text.Length - pos - literal.Length;
var originalText = text.Slice(pos, length);
lastPos = pos + length;
var varFragment = new PageVariableFragment(originalText, expr, filters);
to.Add(varFragment);
var newLineLen = literal.StartsWith("\n")
? 1
: literal.StartsWith("\r\n")
? 2
: 0;
if (newLineLen > 0)
{
var lastExpr = varFragment.FilterExpressions?.LastOrDefault();
var filterName = lastExpr?.Name ??
varFragment?.InitialExpression?.Name ?? varFragment.Binding;
if (filterName != null && ScriptConfig.RemoveNewLineAfterFiltersNamed.Contains(filterName))
{
lastPos += newLineLen;
}
}
}
}
if (lastPos != text.Length)
{
var lastBlock = lastPos == 0 ? text : text.Slice(lastPos);
to.Add(new PageStringFragment(lastBlock));
}
return(to);
}
public static List <PageFragment> ParseTemplate(this ScriptContext context, ReadOnlyMemory <char> text)
{
var to = new List <PageFragment>();
if (text.IsNullOrWhiteSpace())
{
return(to);
}
int pos;
var lastPos = 0;
int nextPos()
{
var c1 = text.IndexOf("{{", lastPos);
var c2 = text.IndexOf("{|", lastPos);
if (c2 == -1)
{
return(c1);
}
return(c1 == -1 ? c2 : c1 < c2 ? c1 : c2);
}
while ((pos = nextPos()) != -1)
{
var block = text.Slice(lastPos, pos - lastPos);
if (!block.IsNullOrEmpty())
{
to.Add(new PageStringFragment(block));
}
var varStartPos = pos + 2;
if (varStartPos >= text.Span.Length)
{
throw new SyntaxErrorException($"Unterminated '{{{{' expression, near '{text.Slice(lastPos).DebugLiteral()}'");
}
if (text.Span.SafeCharEquals(varStartPos - 1, '|')) // lang expression syntax {|lang ... |} https://flow.org/en/docs/types/objects/#toc-exact-object-types
{
var literal = text.Slice(varStartPos);
ScriptLanguage lang = null;
if (literal.SafeGetChar(0).IsValidVarNameChar())
{
literal = literal.ParseVarName(out var langSpan);
lang = context.GetScriptLanguage(langSpan.ToString());
if (lang != null)
{
var endPos = literal.IndexOf("|}");
if (endPos == -1)
{
throw new SyntaxErrorException($"Unterminated '|}}' expression, near '{text.Slice(varStartPos).DebugLiteral()}'");
}
var exprStr = literal.Slice(0, endPos);
var langExprFragment = lang.Parse(context, exprStr);
to.AddRange(langExprFragment);
}
}
if (lang == null)
{
var nextLastPos = text.IndexOf("|}", varStartPos) + 2;
block = text.Slice(pos, nextLastPos - pos);
if (!block.IsNullOrEmpty())
{
to.Add(new PageStringFragment(block));
}
}
lastPos = text.IndexOf("|}", varStartPos) + 2;
continue;
}
var firstChar = text.Span[varStartPos];
if (firstChar == '*') //comment
{
lastPos = text.IndexOf("*}}", varStartPos) + 3;
if (text.Span.SafeCharEquals(lastPos, '\r'))
{
lastPos++;
}
if (text.Span.SafeCharEquals(lastPos, '\n'))
{
lastPos++;
}
}
else if (firstChar == '#') //block statement
{
var literal = text.Slice(varStartPos + 1);
literal = literal.ParseTemplateScriptBlock(context, out var blockFragment);
var length = text.Length - pos - literal.Length;
blockFragment.OriginalText = text.Slice(pos, length);
lastPos = pos + length;
to.Add(blockFragment);
}
else
{
var literal = text.Slice(varStartPos).Span;
literal = literal.ParseJsExpression(out var expr, filterExpression: true);
var filters = new List <JsCallExpression>();
if (!literal.StartsWith("}}"))
{
literal = literal.AdvancePastWhitespace();
if (literal.FirstCharEquals(FilterSep))
{
literal = literal.AdvancePastPipeOperator();
while (true)
{
literal = literal.ParseJsCallExpression(out var filter, filterExpression: true);
filters.Add(filter);
literal = literal.AdvancePastWhitespace();
if (literal.IsNullOrEmpty())
{
throw new SyntaxErrorException("Unterminated filter expression");
}
if (literal.StartsWith("}}"))
{
literal = literal.Advance(2);
break;
}
if (!literal.FirstCharEquals(FilterSep))
{
throw new SyntaxErrorException(
$"Expected pipeline operator '|>' but was {literal.DebugFirstChar()}");
}
literal = literal.AdvancePastPipeOperator();
}
}
else if (!literal.AdvancePastWhitespace().IsNullOrEmpty())
{
throw new SyntaxErrorException($"Unexpected syntax '{literal.ToString()}', Expected pipeline operator '|>'");
}
}
else
{
literal = literal.Advance(2);
}
var length = text.Length - pos - literal.Length;
var originalText = text.Slice(pos, length);
lastPos = pos + length;
var varFragment = new PageVariableFragment(originalText, expr, filters);
to.Add(varFragment);
var newLineLen = literal.StartsWith("\n")
? 1
: literal.StartsWith("\r\n")
? 2
: 0;
if (newLineLen > 0)
{
var lastExpr = varFragment.FilterExpressions?.LastOrDefault();
var filterName = lastExpr?.Name ??
varFragment?.InitialExpression?.Name ?? varFragment.Binding;
if ((filterName != null && context.RemoveNewLineAfterFiltersNamed.Contains(filterName)) ||
expr is JsVariableDeclaration)
{
lastPos += newLineLen;
}
}
}
}
if (lastPos != text.Length)
{
var lastBlock = lastPos == 0 ? text : text.Slice(lastPos);
to.Add(new PageStringFragment(lastBlock));
}
return(to);
}
public static List <PageFragment> ParseTemplate(this ScriptContext context, ReadOnlyMemory <char> text)
{
var to = new List <PageFragment>();
if (text.IsNullOrWhiteSpace())
{
return(to);
}
int pos;
var lastPos = 0;
while ((pos = text.IndexOf("{{", lastPos)) != -1)
{
var block = text.Slice(lastPos, pos - lastPos);
if (!block.IsNullOrEmpty())
{
to.Add(new PageStringFragment(block));
}
var varStartPos = pos + 2;
if (varStartPos >= text.Span.Length)
{
throw new SyntaxErrorException($"Unterminated '{{{{' expression, near '{text.Slice(lastPos).DebugLiteral()}'");
}
var firstChar = text.Span[varStartPos];
if (firstChar == '*') //comment
{
lastPos = text.IndexOf("*}}", varStartPos) + 3;
if (text.Span.SafeCharEquals(lastPos, '\r'))
{
lastPos++;
}
if (text.Span.SafeCharEquals(lastPos, '\n'))
{
lastPos++;
}
}
else if (firstChar == '#') //block statement
{
var literal = text.Slice(varStartPos + 1);
literal = literal.ParseTemplateScriptBlock(context, out var blockFragment);
var length = text.Length - pos - literal.Length;
blockFragment.OriginalText = text.Slice(pos, length);
lastPos = pos + length;
to.Add(blockFragment);
}
else
{
var literal = text.Slice(varStartPos).Span;
literal = literal.ParseJsExpression(out var expr, filterExpression: true);
var filters = new List <JsCallExpression>();
if (!literal.StartsWith("}}"))
{
literal = literal.AdvancePastWhitespace();
if (literal.FirstCharEquals(FilterSep))
{
literal = literal.Advance(1);
while (true)
{
literal = literal.ParseJsCallExpression(out var filter, filterExpression: true);
filters.Add(filter);
literal = literal.AdvancePastWhitespace();
if (literal.IsNullOrEmpty())
{
throw new SyntaxErrorException("Unterminated filter expression");
}
if (literal.StartsWith("}}"))
{
literal = literal.Advance(2);
break;
}
if (!literal.FirstCharEquals(FilterSep))
{
throw new SyntaxErrorException(
$"Expected filter separator '|' but was {literal.DebugFirstChar()}");
}
literal = literal.Advance(1);
}
}
else
{
if (!literal.IsNullOrEmpty())
{
literal = literal.Advance(1);
}
}
}
else
{
literal = literal.Advance(2);
}
var length = text.Length - pos - literal.Length;
var originalText = text.Slice(pos, length);
lastPos = pos + length;
var varFragment = new PageVariableFragment(originalText, expr, filters);
to.Add(varFragment);
var newLineLen = literal.StartsWith("\n")
? 1
: literal.StartsWith("\r\n")
? 2
: 0;
if (newLineLen > 0)
{
var lastExpr = varFragment.FilterExpressions?.LastOrDefault();
var filterName = lastExpr?.Name ??
varFragment?.InitialExpression?.Name ?? varFragment.Binding;
if (filterName != null && context.RemoveNewLineAfterFiltersNamed.Contains(filterName))
{
lastPos += newLineLen;
}
}
}
}
if (lastPos != text.Length)
{
var lastBlock = lastPos == 0 ? text : text.Slice(lastPos);
to.Add(new PageStringFragment(lastBlock));
}
return(to);
}
