/// <summary>
/// Creates an eval expression given template replacement info
/// </summary>
/// <param name="replacementKeyToken">The replacement key token which in this case is the evaluation expression</param>
/// <param name="parameters">Optional parameters for foreground and background colors. The values should be valid ConsoleColor values.</param>
/// <param name="body">Should be empty. Eval expressions don't support bodies.</param>
/// <returns></returns>
public IDocumentExpression CreateExpression(DocumentToken replacementKeyToken, List <DocumentToken> parameters, List <DocumentToken> body)
{
if (body.Count > 0)
{
throw new DocumentRenderException("eval tags can't have a body", replacementKeyToken);
}
TokenReader <DocumentToken> reader = new TokenReader <DocumentToken>(parameters);
DocumentToken fgToken, bgToken;
var ret = new EvalExpression(replacementKeyToken);
if (reader.TryAdvance(out fgToken, skipWhitespace: true) == false)
{
return(ret);
}
else
{
ret.ForegroundColorToken = fgToken;
}
if (reader.TryAdvance(out bgToken, skipWhitespace: true) == false)
{
return(ret);
}
else
{
ret.BackgroundColorToken = bgToken;
}
return(ret);
}
/// <summary>
/// Removes a local variable. This will throw if there is no variable with the given name
/// </summary>
/// <param name="variableToken">The token containing the identifier of the variable to remove</param>
public void Remove(DocumentToken variableToken)
{
if (localVariables.Remove(variableToken.Value) == false)
{
throw new ArgumentException("There is no variable to remove called '" + variableToken.Value + "' at " + variableToken.Position);
}
}
/// <summary>
/// Creates a new table expression given a collection evaluation expression and a list of column tokens
/// </summary>
/// <param name="evalToken">A token containing an expression that should evaluate to an IEnumerable</param>
/// <param name="columns">A list of tokens containing the names of columns to display in the table</param>
public TableExpression(DocumentToken evalToken, List <DocumentToken> columns)
{
this.EvalToken = evalToken;
this.Columns = columns;
this.ShowDefaultValuesForArguments = true;
this.ShowPossibleValuesForArguments = true;
}
/// <summary>
/// Creates a variable expression given replacement info
/// </summary>
/// <param name="replacementKeyToken">The replacement key token that should have a value of 'var'</param>
/// <param name="parameters">There should be 2 parameters. The name of the variable and the initial value.</param>
/// <param name="body">There should be no body</param>
/// <returns>A variable expression</returns>
public IDocumentExpression CreateExpression(DocumentToken replacementKeyToken, List <DocumentToken> parameters, List <DocumentToken> body)
{
if (body.Count > 0)
{
throw new DocumentRenderException("var tags can't have a body", body.First());
}
TokenReader <DocumentToken> reader = new TokenReader <DocumentToken>(parameters);
DocumentToken variableName;
if (reader.TryAdvance(out variableName, skipWhitespace: true) == false)
{
throw new DocumentRenderException("Expected variable name after var tag", replacementKeyToken);
}
DocumentToken variableValue;
if (reader.TryAdvance(out variableValue, skipWhitespace: true) == false)
{
throw new DocumentRenderException("Expected variable value expression", variableName);
}
return(new VarExpression(variableName, variableValue));
}
private static void AssignTokenTypes(DocumentToken token, List <DocumentToken> tokens)
{
DocumentTokenType?previousNonWhitespaceTokenType = null;
var myIndex = tokens.IndexOf(token);
for (var i = myIndex - 1; i >= 0; i--)
{
var current = tokens[i];
if (string.IsNullOrWhiteSpace(current.Value) == false)
{
previousNonWhitespaceTokenType = current.TokenType;
break;
}
}
DocumentTokenType constantValueType;
if (TryParseDocumentTokenType(token.Value, out constantValueType))
{
token.TokenType = constantValueType;
}
else if (previousNonWhitespaceTokenType.HasValue && (previousNonWhitespaceTokenType.Value == DocumentTokenType.BeginReplacementSegment || previousNonWhitespaceTokenType.Value == DocumentTokenType.BeginTerminateReplacementSegment))
{
token.TokenType = DocumentTokenType.ReplacementKey;
}
else if (previousNonWhitespaceTokenType.HasValue && (previousNonWhitespaceTokenType.Value == DocumentTokenType.ReplacementKey || previousNonWhitespaceTokenType.Value == DocumentTokenType.ReplacementParameter))
{
token.TokenType = DocumentTokenType.ReplacementParameter;
}
else
{
token.TokenType = DocumentTokenType.PlainText;
}
}
/// <summary>
/// Creates a template expression given a replacement token and parameters.
/// </summary>
/// <param name="replacementKeyToken">The token whose value should be 'template'</param>
/// <param name="parameters">There should be 2 parameters. One representing the name of the template to render and one representing the data to bind to the template.</param>
/// <param name="body">Should be empty. Template expressions do not support a body.</param>
/// <returns>a template expression</returns>
public IDocumentExpression CreateExpression(DocumentToken replacementKeyToken, List <DocumentToken> parameters, List <DocumentToken> body)
{
if (body.Count > 0)
{
throw new DocumentRenderException("template tags can't have a body", replacementKeyToken);
}
TokenReader <DocumentToken> reader = new TokenReader <DocumentToken>(parameters);
DocumentToken idToken;
if (reader.TryAdvance(out idToken, skipWhitespace: true) == false)
{
throw new DocumentRenderException("missing template Id", replacementKeyToken);
}
DocumentToken evalToken;
if (reader.TryAdvance(out evalToken, skipWhitespace: true) == false)
{
throw new DocumentRenderException("missing eval token", idToken);
}
var ret = new TemplateExpression(idToken, evalToken);
return(ret);
}
private static bool IsReplacementToken(DocumentToken token)
{
return(token.TokenType == DocumentTokenType.BeginReplacementSegment ||
token.TokenType == DocumentTokenType.BeginTerminateReplacementSegment ||
token.TokenType == DocumentTokenType.EndReplacementSegment ||
token.TokenType == DocumentTokenType.QuickTerminateReplacementSegment ||
token.TokenType == DocumentTokenType.ReplacementKey ||
token.TokenType == DocumentTokenType.ReplacementParameter);
}
internal DocumentTemplateInfo GetTemplate(DocumentToken nameToken)
{
DocumentTemplateInfo ret;
if (namedTemplates.TryGetValue(nameToken.Value, out ret) == false)
{
throw new DocumentRenderException("There is no templated named '" + nameToken.Value + "'", nameToken);
}
return ret;
}
/// <summary>
/// Creates a new table expression given a collection evaluation expression and a list of column tokens
/// </summary>
/// <param name="evalToken">A token containing an expression that should evaluate to an IEnumerable</param>
/// <param name="columns">A list of tokens containing the names of columns to display in the table</param>
/// <param name="context">Context that is used to determine the indentation of the table within the document</param>
public TableExpression(DocumentToken evalToken, List <DocumentToken> columns, DocumentExpressionContext context)
{
this.EvalToken = evalToken;
this.Columns = columns;
this.ShowDefaultValuesForArguments = true;
this.ShowPossibleValuesForArguments = true;
this.indent = context.OpenToken.Column - 1;
}
/// <summary>
/// Creates a new table expression given a collection evaluation expression and a list of column tokens
/// </summary>
/// <param name="evalToken">A token containing an expression that should evaluate to an IEnumerable</param>
/// <param name="columns">A list of tokens containing the names of columns to display in the table</param>
/// <param name="context">Context that is used to determine the indentation of the table within the document</param>
public TableExpression(DocumentToken evalToken, List<DocumentToken> columns, DocumentExpressionContext context)
{
this.EvalToken = evalToken;
this.Columns = columns;
this.ShowDefaultValuesForArguments = true;
this.ShowPossibleValuesForArguments = true;
this.indent = context.OpenToken.Column - 1;
}
private void ParseReplacement(TokenReader <DocumentToken> reader, List <IDocumentExpression> ret)
{
var openToken = AdvanceAndExpectConstantType(reader, DocumentTokenType.BeginReplacementSegment);
var replacementKeyToken = AdvanceAndExpect(reader, DocumentTokenType.ReplacementKey, "replacement key", skipWhitespace: true);
List <DocumentToken> parameters = new List <DocumentToken>();
List <DocumentToken> body = new List <DocumentToken>();
while (reader.CanAdvance(skipWhitespace: true) && reader.Peek(skipWhitespace: true).TokenType == DocumentTokenType.ReplacementParameter)
{
var paramToken = reader.Advance(skipWhitespace: true);
parameters.Add(paramToken);
}
DocumentToken closeReplacementToken;
if (reader.TryAdvance(out closeReplacementToken, skipWhitespace: true) == false)
{
throw Unexpected(string.Format("'{0}' or '{1}'", DocumentToken.GetTokenTypeValue(DocumentTokenType.EndReplacementSegment), DocumentToken.GetTokenTypeValue(DocumentTokenType.QuickTerminateReplacementSegment)));
}
if (closeReplacementToken.TokenType == DocumentTokenType.EndReplacementSegment)
{
body.AddRange(ReadReplacementBody(reader, replacementKeyToken));
}
else if (closeReplacementToken.TokenType == DocumentTokenType.QuickTerminateReplacementSegment)
{
// do nothing, there is no body when the quick termination replacement segment is used
}
else
{
throw Unexpected(string.Format("'{0}' or '{1}'", DocumentToken.GetTokenTypeValue(DocumentTokenType.EndReplacementSegment), DocumentToken.GetTokenTypeValue(DocumentTokenType.QuickTerminateReplacementSegment)), closeReplacementToken);
}
IDocumentExpressionProvider provider;
if (this.expressionProviders.TryGetValue(replacementKeyToken.Value, out provider) == false)
{
provider = new EvalExpressionProvider();
}
var context = new DocumentExpressionContext
{
OpenToken = openToken,
CloseToken = closeReplacementToken,
Parameters = parameters.AsReadOnly(),
Body = body.AsReadOnly(),
ReplacementKeyToken = replacementKeyToken,
};
var expression = provider.CreateExpression(context);
ret.Add(expression);
}
/// <summary>
/// Adds a new local variable. This will throw if there's already a variable defined with the given identifier
/// </summary>
/// <param name="variableToken">The token containing the identifier of the variable name</param>
/// <param name="value">The initial value of the local variable</param>
public void Add(DocumentToken variableToken, object value)
{
if (localVariables.ContainsKey(variableToken.Value))
{
throw new ArgumentException("There is already a variable called '" + variableToken.Value + "' at " + variableToken.Position);
}
else
{
localVariables.Add(variableToken.Value, value);
}
}
private DocumentRenderException Unexpected(string expected, DocumentToken actual = null)
{
if (actual != null)
{
return(new DocumentRenderException(string.Format("Expected '{0}', got '{1}'", expected, actual.Value), actual));
}
else
{
var format = "Expected '{0}'";
var msg = string.Format(format, expected);
return(new DocumentRenderException(msg, DocumentRenderException.NoTokenReason.EndOfString));
}
}
/// <summary>
/// Creates a table expression from the given document info.
/// </summary>
/// <param name="replacementKeyToken">The token that should contain a value of 'table'</param>
/// <param name="parameters">Replacement parameters that should be column names and optional properties</param>
/// <param name="body">Should be empty. Table expressions don't support bodies</param>
/// <returns>The created document expression</returns>
public IDocumentExpression CreateExpression(DocumentToken replacementKeyToken, List <DocumentToken> parameters, List <DocumentToken> body)
{
if (body.Count > 0)
{
throw new DocumentRenderException("table tags can't have a body", replacementKeyToken);
}
TokenReader <DocumentToken> reader = new TokenReader <DocumentToken>(parameters);
DocumentToken variableExpressionToken;
if (reader.TryAdvance(out variableExpressionToken, skipWhitespace: true) == false)
{
throw new DocumentRenderException("missing collection expression after table tag", replacementKeyToken);
}
List <DocumentToken> columns = new List <DocumentToken>();
bool showDefaults = true;
bool showPossibilities = true;
while (reader.CanAdvance(skipWhitespace: true))
{
var nextToken = reader.Advance(skipWhitespace: true);
if (nextToken.Value == "-HideDefaults")
{
showDefaults = false;
}
else if (nextToken.Value == "-HideEnumValues")
{
showPossibilities = false;
}
else
{
columns.Add(nextToken);
}
}
if (columns.Count == 0)
{
throw new DocumentRenderException("table elements need to have at least one column parameter", replacementKeyToken);
}
return(new TableExpression(variableExpressionToken, columns)
{
ShowDefaultValuesForArguments = showDefaults, ShowPossibleValuesForArguments = showPossibilities
});
}
private DocumentToken AdvanceAndExpectConstantType(TokenReader <DocumentToken> reader, DocumentTokenType expectedType)
{
DocumentToken read;
if (reader.TryAdvance(out read, skipWhitespace: true) == false)
{
throw Unexpected(DocumentToken.GetTokenTypeValue(expectedType));
}
if (read.TokenType != expectedType)
{
throw Unexpected(DocumentToken.GetTokenTypeValue(expectedType), read);
}
return(read);
}
private static List <DocumentToken> RemoveLinesThatOnlyContainReplacements(List <DocumentToken> tokens)
{
var currentLine = 1;
int numContentTokensOnCurrentLine = 0;
int numReplacementTokensOnCurrentLine = 0;
List <DocumentToken> filtered = new List <DocumentToken>();
DocumentToken lastToken = null;
foreach (var token in tokens)
{
lastToken = token;
if (token.Line != currentLine)
{
currentLine = token.Line;
FilterOutNewlinesIfNeeded(numContentTokensOnCurrentLine, numReplacementTokensOnCurrentLine, filtered);
numReplacementTokensOnCurrentLine = 0;
numContentTokensOnCurrentLine = 0;
}
if (string.IsNullOrWhiteSpace(token.Value))
{
// do nothing
}
else if (IsReplacementToken(token))
{
numReplacementTokensOnCurrentLine++;
}
else
{
numContentTokensOnCurrentLine++;
}
filtered.Add(token);
}
if (lastToken != null)
{
currentLine = lastToken.Line;
FilterOutNewlinesIfNeeded(numContentTokensOnCurrentLine, numReplacementTokensOnCurrentLine, filtered);
numReplacementTokensOnCurrentLine = 0;
numContentTokensOnCurrentLine = 0;
}
return(filtered);
}
/// <summary>
/// Creates either an if or an ifnot expression, based on its configuration, using the given document info.
/// </summary>
/// <param name="replacementKeyToken">The replacement key token whose value is either 'if' or 'ifnot'</param>
/// <param name="parameters">There should be no parameters to an if or ifnot expression</param>
/// <param name="body">The body which will be conditionally rendered.</param>
/// <returns>The expression, either an if or an ifnot expression</returns>
public IDocumentExpression CreateExpression(DocumentToken replacementKeyToken, List <DocumentToken> parameters, List <DocumentToken> body)
{
TokenReader <DocumentToken> reader = new TokenReader <DocumentToken>(parameters);
DocumentToken ifExpressionToken;
if (reader.TryAdvance(out ifExpressionToken, skipWhitespace: true) == false)
{
throw new DocumentRenderException("missing if expression", replacementKeyToken);
}
if (reader.CanAdvance(skipWhitespace: true))
{
throw new DocumentRenderException("unexpected parameters after if expression", reader.Advance(skipWhitespace: true));
}
return(not ? new IfNotExpression(ifExpressionToken, body) : new IfExpression(ifExpressionToken, body));
}
/// <summary>
/// Takes in document replacement info and converts it into a document expression that represents an each loop.
/// </summary>
/// <param name="replacementKeyToken">The token that is expected to have a value of 'each'</param>
/// <param name="parameters">The parameters which should follow the format ITERATION_VARIABLE_NAME in COLLECTION_EXPRESSION</param>
/// <param name="body">The body of the each loop</param>
/// <returns>The parsed each expression</returns>
public IDocumentExpression CreateExpression(DocumentToken replacementKeyToken, List <DocumentToken> parameters, List <DocumentToken> body)
{
if (body.Count == 0)
{
throw new DocumentRenderException("Each tag has no body", replacementKeyToken);
}
TokenReader <DocumentToken> reader = new TokenReader <DocumentToken>(parameters);
DocumentToken variableName;
if (reader.TryAdvance(out variableName, skipWhitespace: true) == false)
{
throw new DocumentRenderException("missing variable name in each tag", replacementKeyToken);
}
DocumentToken inToken;
if (reader.TryAdvance(out inToken, skipWhitespace: true) == false)
{
throw new DocumentRenderException("Expected 'in' after iteration variable", variableName);
}
if (inToken.Value != "in")
{
throw new DocumentRenderException("Expected 'in', got '" + inToken.Value + "'", inToken);
}
DocumentToken collectionExpressionToken;
if (reader.TryAdvance(out collectionExpressionToken, skipWhitespace: true) == false)
{
throw new DocumentRenderException("Expected collection expression after 'in' ", inToken);
}
DocumentToken unexpected;
if (reader.TryAdvance(out unexpected, skipWhitespace: true))
{
throw new DocumentRenderException("Unexpected parameter '" + unexpected.Value + "' after collection", unexpected);
}
return(new EachExpression(variableName, collectionExpressionToken, body));
}
private DocumentRenderException Unexpected(DocumentToken t)
{
return(new DocumentRenderException(string.Format("Unexpected token '{0}'", t.Value), t));
}
/// <summary>
/// Adds a new local variable. This will throw if there's already a variable defined with the given identifier
/// </summary>
/// <param name="variableToken">The token containing the identifier of the variable name</param>
/// <param name="value">The initial value of the local variable</param>
public void Add(DocumentToken variableToken, object value)
{
if(localVariables.ContainsKey(variableToken.Value))
{
throw new ArgumentException("There is already a variable called '" + variableToken.Value + "' at " + variableToken.Position);
}
else
{
localVariables.Add(variableToken.Value, value);
}
}
private List<DocumentToken> ReadReplacementBody(TokenReader<DocumentToken> reader, DocumentToken replacementKeyToken)
{
List<DocumentToken> replacementContents = new List<DocumentToken>();
int numOpenReplacements = 1;
while (reader.CanAdvance())
{
if (reader.Peek().TokenType == DocumentTokenType.BeginReplacementSegment)
{
numOpenReplacements++;
}
else if (reader.Peek().TokenType == DocumentTokenType.QuickTerminateReplacementSegment)
{
numOpenReplacements--;
if(numOpenReplacements == 0)
{
throw Unexpected(reader.Peek());
}
}
else if (reader.Peek().TokenType == DocumentTokenType.BeginTerminateReplacementSegment)
{
numOpenReplacements--;
if(numOpenReplacements == 0)
{
AdvanceAndExpectConstantType(reader, DocumentTokenType.BeginTerminateReplacementSegment);
AdvanceAndExpect(reader, DocumentTokenType.ReplacementKey, replacementKeyToken.Value, skipWhitespace: true);
AdvanceAndExpectConstantType(reader, DocumentTokenType.EndReplacementSegment);
break;
}
}
replacementContents.Add(reader.Advance());
}
if(numOpenReplacements != 0)
{
throw Unexpected("end of '" + replacementKeyToken.Value + "' replacement");
}
return replacementContents;
}
/// <summary>
/// Creates a new ifnot expression given a conditional token and a body
/// </summary>
/// <param name="ifExpressionToken">The token containing the conditional expression</param>
/// <param name="body">The body of the document to render only if the condition evaluates to false</param>
public IfNotExpression(DocumentToken ifExpressionToken, IEnumerable <DocumentToken> body) : base(ifExpressionToken, body)
{
}
/// <summary>
/// Creates a new each expression given an iteration variable name, a collection expression, and a body.
/// </summary>
/// <param name="iterationVariable">The name to assign to ther variable representing the current element in the template</param>
/// <param name="collectionExpression">The expression used to determine the collection to enumerate</param>
/// <param name="body">The body of the each loop</param>
public EachExpression(DocumentToken iterationVariable, DocumentToken collectionExpression, List <DocumentToken> body)
{
this.IterationVariableNameToken = iterationVariable;
this.CollectionVariableExpressionToken = collectionExpression;
this.Body = body;
}
private DocumentRenderException Unexpected(DocumentToken t)
{
return new DocumentRenderException(string.Format("Unexpected token '{0}'", t.Value), t);
}
private static bool IsReplacementToken(DocumentToken token)
{
return token.TokenType == DocumentTokenType.BeginReplacementSegment ||
token.TokenType == DocumentTokenType.BeginTerminateReplacementSegment ||
token.TokenType == DocumentTokenType.EndReplacementSegment ||
token.TokenType == DocumentTokenType.QuickTerminateReplacementSegment ||
token.TokenType == DocumentTokenType.ReplacementKey ||
token.TokenType == DocumentTokenType.ReplacementParameter;
}
/// <summary>
/// Creates a new if expression given a conditional token and a body
/// </summary>
/// <param name="ifExpressionToken">The token containing the conditional expression</param>
/// <param name="body">The body of the document to render only if the condition evaluates to true</param>
public IfExpression(DocumentToken ifExpressionToken, List <DocumentToken> body)
{
this.IfExpressionToken = ifExpressionToken;
this.Body = body;
}
/// <summary>
/// Creates an exception given a message and the offending token
/// </summary>
/// <param name="msg">The exception message</param>
/// <param name="offendingToken">The offending token</param>
public DocumentRenderException(string msg, DocumentToken offendingToken) : base(msg + ": " + offendingToken.Position)
{
}
/// <summary>
/// Creates an eval expression given a token that represents the expression to evaluate
/// </summary>
/// <param name="evalToken">The token containing the expression to evaluate</param>
public EvalExpression(DocumentToken evalToken)
{
this.EvalToken = evalToken;
}
/// <summary>
/// Creates a new clear variable expression given a variable name
/// </summary>
/// <param name="name">A token containing the name of the variable whose scope is ending</param>
public ClearVarExpression(DocumentToken name)
{
this.NameToken = name;
}
/// <summary>
/// Creates a new each expression given an iteration variable name, a collection expression, and a body.
/// </summary>
/// <param name="iterationVariable">The name to assign to ther variable representing the current element in the template</param>
/// <param name="collectionExpression">The expression used to determine the collection to enumerate</param>
/// <param name="body">The body of the each loop</param>
public EachExpression(DocumentToken iterationVariable, DocumentToken collectionExpression, IEnumerable<DocumentToken> body)
{
this.IterationVariableNameToken = iterationVariable;
this.CollectionVariableExpressionToken = collectionExpression;
this.Body = body;
}
/// <summary>
/// Dynamically renders the given template.
/// </summary>
/// <param name="dynamicTemplate">The template to render</param>
/// <param name="nestedToken">The token in the original document that resulted in dynamic rendering</param>
/// <returns>The rendered content</returns>
public ConsoleString RenderDynamicContent(string dynamicTemplate, DocumentToken nestedToken)
{
return(this.DocumentRenderer.Render(dynamicTemplate, this, "dynamic evaluation sourced from '" + nestedToken.Position + "'"));
}
/// <summary>
/// Removes a local variable. This will throw if there is no variable with the given name
/// </summary>
/// <param name="variableToken">The token containing the identifier of the variable to remove</param>
public void Remove(DocumentToken variableToken)
{
if (localVariables.Remove(variableToken.Value) == false)
{
throw new ArgumentException("There is no variable to remove called '" + variableToken.Value + "' at " + variableToken.Position);
}
}
/// <summary>
/// Creates a new template expression given an id token and a data evaluation token.
/// </summary>
/// <param name="idToken">A token containing the id of the template to render</param>
/// <param name="evalToken">A token containing an expression to be evaluated. The result of the evaluation will be
/// used as the root data object to be bound to the named template.</param>
public TemplateExpression(DocumentToken idToken, DocumentToken evalToken)
{
this.IdToken = idToken;
this.EvalToken = evalToken;
}
/// <summary>
/// Creates an exception given a message and the offending token
/// </summary>
/// <param name="msg">The exception message</param>
/// <param name="offendingToken">The offending token</param>
public DocumentRenderException(string msg, DocumentToken offendingToken)
: base(msg + ": " + offendingToken.Position)
{
}
/// <summary>
/// Creates a plain text document expression given a single plain text token
/// </summary>
/// <param name="singleToken">A single plain text token to render without any special handling</param>
public PlainTextDocumentExpression(DocumentToken singleToken) : this(new List <DocumentToken> {
singleToken
})
{
}
/// <summary>
/// Creates a new ifnot expression given a conditional token and a body
/// </summary>
/// <param name="ifExpressionToken">The token containing the conditional expression</param>
/// <param name="body">The body of the document to render only if the condition evaluates to false</param>
public IfNotExpression(DocumentToken ifExpressionToken, List <DocumentToken> body) : base(ifExpressionToken, body)
{
}
/// <summary>
/// Creates a new ifnot expression given a conditional token and a body
/// </summary>
/// <param name="ifExpressionToken">The token containing the conditional expression</param>
/// <param name="body">The body of the document to render only if the condition evaluates to false</param>
public IfNotExpression(DocumentToken ifExpressionToken, IEnumerable<DocumentToken> body)
: base(ifExpressionToken, body)
{
}
internal DocumentTemplateInfo GetTemplate(DocumentToken nameToken)
{
DocumentTemplateInfo ret;
if (namedTemplates.TryGetValue(nameToken.Value, out ret) == false)
{
throw new DocumentRenderException("There is no templated named '" + nameToken.Value + "'", nameToken);
}
return ret;
}
private DocumentRenderException Unexpected(string expected, DocumentToken actual = null)
{
if (actual != null)
{
return new DocumentRenderException(string.Format("Expected '{0}', got '{1}'", expected, actual.Value), actual);
}
else
{
var format = "Expected '{0}'";
var msg = string.Format(format, expected);
return new DocumentRenderException(msg, DocumentRenderException.NoTokenReason.EndOfString);
}
}
/// <summary>
/// Creates a new if expression given a conditional token and a body
/// </summary>
/// <param name="ifExpressionToken">The token containing the conditional expression</param>
/// <param name="body">The body of the document to render only if the condition evaluates to true</param>
public IfExpression(DocumentToken ifExpressionToken, IEnumerable <DocumentToken> body)
{
this.IfExpressionToken = ifExpressionToken;
this.Body = body;
}
private List <DocumentToken> ReadReplacementBody(TokenReader <DocumentToken> reader, DocumentToken replacementKeyToken)
{
List <DocumentToken> replacementContents = new List <DocumentToken>();
int numOpenReplacements = 1;
while (reader.CanAdvance())
{
if (reader.Peek().TokenType == DocumentTokenType.BeginReplacementSegment)
{
numOpenReplacements++;
}
else if (reader.Peek().TokenType == DocumentTokenType.QuickTerminateReplacementSegment)
{
numOpenReplacements--;
if (numOpenReplacements == 0)
{
throw Unexpected(reader.Peek());
}
}
else if (reader.Peek().TokenType == DocumentTokenType.BeginTerminateReplacementSegment)
{
numOpenReplacements--;
if (numOpenReplacements == 0)
{
AdvanceAndExpectConstantType(reader, DocumentTokenType.BeginTerminateReplacementSegment);
AdvanceAndExpect(reader, DocumentTokenType.ReplacementKey, replacementKeyToken.Value, skipWhitespace: true);
AdvanceAndExpectConstantType(reader, DocumentTokenType.EndReplacementSegment);
break;
}
}
replacementContents.Add(reader.Advance());
}
if (numOpenReplacements != 0)
{
throw Unexpected("end of '" + replacementKeyToken.Value + "' replacement");
}
return(replacementContents);
}
/// <summary>
/// Creates an eval expression given a token that represents the expression to evaluate
/// </summary>
/// <param name="evalToken">The token containing the expression to evaluate</param>
public EvalExpression(DocumentToken evalToken)
{
this.EvalToken = evalToken;
}
/// <summary>
/// Creates a new if expression given a conditional token and a body
/// </summary>
/// <param name="ifExpressionToken">The token containing the conditional expression</param>
/// <param name="body">The body of the document to render only if the condition evaluates to true</param>
public IfExpression(DocumentToken ifExpressionToken, IEnumerable<DocumentToken> body)
{
this.IfExpressionToken = ifExpressionToken;
this.Body = body;
}
/// <summary>
/// Dynamically renders the given template.
/// </summary>
/// <param name="dynamicTemplate">The template to render</param>
/// <param name="nestedToken">The token in the original document that resulted in dynamic rendering</param>
/// <returns>The rendered content</returns>
public ConsoleString RenderDynamicContent(string dynamicTemplate, DocumentToken nestedToken)
{
return this.DocumentRenderer.Render(dynamicTemplate, this, "dynamic evaluation sourced from '" + nestedToken.Position + "'");
}
internal ConsoleString Render(string template, DocumentRendererContext context, string sourceFileLocation = null)
{
List <DocumentToken> tokens = DocumentToken.Tokenize(template, sourceFileLocation);
return(Render(tokens, context));
}
/// <summary>
/// Creates a new variable expression given a name and value expression
/// </summary>
/// <param name="name">A token containing the name of the local variable to initialize</param>
/// <param name="value">A token containing an expression that should resolve to the initial value of the variable</param>
public VarExpression(DocumentToken name, DocumentToken value)
{
this.NameToken = name;
this.ValueToken = value;
}
/// <summary>
/// Creates a new template expression given an id token and a data evaluation token.
/// </summary>
/// <param name="idToken">A token containing the id of the template to render</param>
/// <param name="evalToken">A token containing an expression to be evaluated. The result of the evaluation will be
/// used as the root data object to be bound to the named template.</param>
public TemplateExpression(DocumentToken idToken, DocumentToken evalToken)
{
this.IdToken = idToken;
this.EvalToken = evalToken;
}
