public override void Walk(AstVisitor visitor)
{
if (visitor.Walk(this))
{
m_condition.Walk(visitor);
if (TrueBlock != null)
{
TrueBlock.Walk(visitor);
}
if (FalseBlock != null)
{
FalseBlock.Walk(visitor);
}
}
visitor.PostWalk(this);
}
internal override bool EncloseBlock(EncloseBlockType type)
{
// if there's an else block, recurse down that branch
if (FalseBlock != null)
{
return(FalseBlock.EncloseBlock(type));
}
else if (type == EncloseBlockType.IfWithoutElse)
{
// there is no else branch -- we might have to enclose the outer block
return(true);
}
else if (TrueBlock != null)
{
return(TrueBlock.EncloseBlock(type));
}
return(false);
}
internal override bool EncloseBlock(EncloseBlockType type)
{
// if there's an else block, recurse down that branch.
// if we aren't forcing braces and the block contains nothing, then we don't
// really have a false block.
if (FalseBlock != null && (FalseBlock.ForceBraces || FalseBlock.Count > 0))
{
return(FalseBlock.EncloseBlock(type));
}
else if (type == EncloseBlockType.IfWithoutElse)
{
// there is no else branch -- we might have to enclose the outer block
return(true);
}
else if (TrueBlock != null)
{
return(TrueBlock.EncloseBlock(type));
}
return(false);
}
public override string ToCode(ToCodeFormat format)
{
StringBuilder sb = new StringBuilder();
sb.Append("if(");
sb.Append(Condition.ToCode());
sb.Append(')');
// if we're in Safari-quirks mode, we will need to wrap the if block
// in curly braces if it only includes a function declaration. Safari
// throws parsing errors in those situations
ToCodeFormat elseFormat = ToCodeFormat.Normal;
if (FalseBlock != null && FalseBlock.Count == 1)
{
if (Parser.Settings.MacSafariQuirks &&
FalseBlock[0] is FunctionObject)
{
elseFormat = ToCodeFormat.AlwaysBraces;
}
else if (FalseBlock[0] is IfNode)
{
elseFormat = ToCodeFormat.ElseIf;
}
}
// get the else block -- we need to know if there is anything in order
// to fully determine if the true-branch needs curly-braces
string elseBlock = (
FalseBlock == null
? string.Empty
: FalseBlock.ToCode(elseFormat));
// we'll need to force the true block to be enclosed in curly braces if
// there is an else block and the true block contains a single statement
// that ends in an if that doesn't have an else block
ToCodeFormat trueFormat = (FalseBlock != null &&
TrueBlock != null &&
TrueBlock.EncloseBlock(EncloseBlockType.IfWithoutElse)
? ToCodeFormat.AlwaysBraces
: ToCodeFormat.Normal);
if (elseBlock.Length > 0 &&
TrueBlock != null &&
TrueBlock.EncloseBlock(EncloseBlockType.SingleDoWhile))
{
trueFormat = ToCodeFormat.AlwaysBraces;
}
// if we're in Safari-quirks mode, we will need to wrap the if block
// in curly braces if it only includes a function declaration. Safari
// throws parsing errors in those situations
if (Parser.Settings.MacSafariQuirks &&
TrueBlock != null &&
TrueBlock.Count == 1 &&
TrueBlock[0] is FunctionObject)
{
trueFormat = ToCodeFormat.AlwaysBraces;
}
// add the true block
string trueBlock = (
TrueBlock == null
? string.Empty
: TrueBlock.ToCode(trueFormat));
sb.Append(trueBlock);
if (elseBlock.Length > 0)
{
if (trueFormat != ToCodeFormat.AlwaysBraces &&
!trueBlock.EndsWith(";", StringComparison.Ordinal) &&
(TrueBlock == null || TrueBlock.RequiresSeparator))
{
sb.Append(';');
}
// if we are in pretty-print mode, drop the else onto a new line
Parser.Settings.NewLine(sb);
sb.Append("else");
// if the first character could be interpreted as a continuation
// of the "else" statement, then we need to add a space
if (JSScanner.StartsWithIdentifierPart(elseBlock))
{
sb.Append(' ');
}
sb.Append(elseBlock);
}
return(sb.ToString());
}
/// <summary>
/// Parse all conditions in template
/// </summary>
private void ParseConditions()
{
int idxPrevious = 0;
int idxCurrent = 0;
this._ParsedBlock = "";
while ((idxCurrent = this._strTemplateBlock.IndexOf(this.ConditionTagIfBegin, idxCurrent)) != -1)
{
string VarName;
string TrueBlock, FalseBlock;
string ElseStatment, EndIfStatment;
int idxIfBegin, idxIfEnd, idxElseBegin, idxEndIfBegin;
bool boolValue;
idxIfBegin = idxCurrent;
idxCurrent += this.ConditionTagIfBegin.Length;
// Searching for EndIf Index
idxIfEnd = this._strTemplateBlock.IndexOf(this.ConditionTagIfEnd, idxCurrent);
if (idxIfEnd == -1)
{
throw new Exception("Could not find ConditionTagIfEnd");
}
// Getting Value Name
VarName = this._strTemplateBlock.Substring(idxCurrent, (idxIfEnd - idxCurrent));
idxCurrent = idxIfEnd + this.ConditionTagIfEnd.Length;
// Compare ElseIf and EndIf Indexes
ElseStatment = this.ConditionTagElseBegin + VarName + this.ConditionTagElseEnd;
EndIfStatment = this.ConditionTagEndIfBegin + VarName + this.ConditionTagEndIfEnd;
idxElseBegin = this._strTemplateBlock.IndexOf(ElseStatment, idxCurrent);
idxEndIfBegin = this._strTemplateBlock.IndexOf(EndIfStatment, idxCurrent);
if (idxElseBegin > idxEndIfBegin)
{
throw new Exception("Condition Else Tag placed after Condition Tag EndIf for '" + VarName + "'");
}
// Getting True and False Condition Blocks
if (idxElseBegin != -1)
{
TrueBlock = this._strTemplateBlock.Substring(idxCurrent, (idxElseBegin - idxCurrent));
FalseBlock = this._strTemplateBlock.Substring((idxElseBegin + ElseStatment.Length), (idxEndIfBegin - idxElseBegin - ElseStatment.Length));
}
else
{
TrueBlock = this._strTemplateBlock.Substring(idxCurrent, (idxEndIfBegin - idxCurrent));
FalseBlock = "";
}
// Parse Condition
try
{
boolValue = Convert.ToBoolean(this._hstValues[VarName]);
}
catch
{
boolValue = false;
}
string BeforeBlock = this._strTemplateBlock.Substring(idxPrevious, (idxIfBegin - idxPrevious));
if (this._hstValues.ContainsKey(VarName) && boolValue)
{
this._ParsedBlock += BeforeBlock + TrueBlock.Trim();
}
else
{
this._ParsedBlock += BeforeBlock + FalseBlock.Trim();
}
idxCurrent = idxEndIfBegin + EndIfStatment.Length;
idxPrevious = idxCurrent;
}
this._ParsedBlock += this._strTemplateBlock.Substring(idxPrevious);
}
