/// <summary>
/// Adds suggestions for a given node.
/// </summary>
/// <param name="node">Node for which suggestions are needed.</param>
/// <param name="hasSpecificSuggestions">Flag to indicate if inner most function has any specific suggestions.</param>
/// <param name="currentNode">Current node in the traversal.</param>
public static bool AddTopLevelSuggestionsForGivenNode(IntellisenseData.IntellisenseData intellisenseData, TexlNode node, TexlNode currentNode)
{
Contracts.AssertValue(intellisenseData);
Contracts.AssertValue(node);
Contracts.AssertValue(currentNode);
CallNode callNode = GetNearestCallNode(currentNode);
if (callNode == null)
{
return(false);
}
if (callNode.Args.Count == 0)
{
AddTopLevelSuggestionsForCursorType(intellisenseData, callNode, 0);
return(TryAddSpecificSuggestionsForGivenArgPosition(intellisenseData, callNode, 0));
}
for (int i = 0; i < callNode.Args.Count; i++)
{
if (node.InTree(callNode.Args.Children[i]))
{
AddTopLevelSuggestionsForCursorType(intellisenseData, callNode, i);
if (Object.ReferenceEquals(node, currentNode) && TryAddSpecificSuggestionsForGivenArgPosition(intellisenseData, callNode, i))
{
return(true);
}
}
}
if (callNode.Parent != null)
{
return(AddTopLevelSuggestionsForGivenNode(intellisenseData, node, callNode.Parent));
}
return(false);
}
private bool IsArgTypeInconsequential(TexlNode arg)
{
Contracts.AssertValue(arg);
Contracts.Assert(arg.Parent is ListNode);
Contracts.Assert(arg.Parent.Parent is CallNode);
Contracts.Assert(arg.Parent.Parent.AsCall().Head.Name == Name);
CallNode call = arg.Parent.Parent.AsCall().VerifyValue();
// Pattern: OnSelect = If(cond, argT, argF)
// Pattern: OnSelect = If(cond, arg1, cond, arg2, ..., argK, argF)
// Pattern: OnSelect = If(cond, arg1, If(cond, argT, argF))
// Pattern: OnSelect = If(cond, arg1, If(cond, arg2, cond, arg3, ...))
// Pattern: OnSelect = If(cond, arg1, cond, If(cond, arg2, cond, arg3, ...), ...)
// ...etc.
CallNode ancestor = call;
while (ancestor.Head.Name == Name)
{
if (ancestor.Parent == null && ancestor.Args.Children.Length > 0)
{
for (int i = 0; i < ancestor.Args.Children.Length; i += 2)
{
// If the given node is part of a condition arg of an outer If invocation,
// then it's NOT inconsequential. Note that the very last arg to an If
// is not a condition -- it's the "else" branch, hence the test below.
if (i != ancestor.Args.Children.Length - 1 && arg.InTree(ancestor.Args.Children[i]))
{
return(false);
}
}
return(true);
}
// Deal with the possibility that the ancestor may be contributing to a chain.
// This also lets us cover the following patterns:
// Pattern: OnSelect = X; If(cond, arg1, arg2); Y; Z
// Pattern: OnSelect = X; If(cond, arg1;arg11;...;arg1k, arg2;arg21;...;arg2k); Y; Z
// ...etc.
VariadicOpNode chainNode;
if ((chainNode = ancestor.Parent.AsVariadicOp()) != null && chainNode.Op == VariadicOp.Chain)
{
// Top-level chain in a behavior rule.
if (chainNode.Parent == null)
{
return(true);
}
// A chain nested within a larger non-call structure.
if (!(chainNode.Parent is ListNode) || !(chainNode.Parent.Parent is CallNode))
{
return(false);
}
// Only the last chain segment is consequential.
int numSegments = chainNode.Children.Length;
if (numSegments > 0 && !arg.InTree(chainNode.Children[numSegments - 1]))
{
return(true);
}
// The node is in the last segment of a chain nested within a larger invocation.
ancestor = chainNode.Parent.Parent.AsCall();
continue;
}
// Walk up the parent chain to the outer invocation.
if (!(ancestor.Parent is ListNode) || !(ancestor.Parent.Parent is CallNode))
{
return(false);
}
ancestor = ancestor.Parent.Parent.AsCall();
}
// Exhausted all supported patterns.
return(false);
}
// In behavior properties, the arg type is irrelevant if nothing actually depends
// on the output type of IfError (see If.cs, Switch.cs)
private bool IsArgTypeInconsequential(TexlNode arg)
{
Contracts.AssertValue(arg);
Contracts.Assert(arg.Parent is ListNode);
Contracts.Assert(arg.Parent.Parent is CallNode);
Contracts.Assert(arg.Parent.Parent.AsCall().Head.Name == Name);
CallNode call = arg.Parent.Parent.AsCall().VerifyValue();
// Pattern: OnSelect = IfError(arg1, arg2, ... argK)
// Pattern: OnSelect = IfError(arg1, IfError(arg1, arg2,...), ... argK)
// ...etc.
CallNode ancestor = call;
while (ancestor.Head.Name == Name)
{
if (ancestor.Parent == null && ancestor.Args.Children.Length > 0)
{
return(true);
}
// Deal with the possibility that the ancestor may be contributing to a chain.
// This also lets us cover the following patterns:
// Pattern: OnSelect = X; IfError(arg1, arg2); Y; Z
// Pattern: OnSelect = X; IfError(arg1;arg11;...;arg1k, arg2;arg21;...;arg2k); Y; Z
// ...etc.
VariadicOpNode chainNode;
if ((chainNode = ancestor.Parent.AsVariadicOp()) != null && chainNode.Op == VariadicOp.Chain)
{
// Top-level chain in a behavior rule.
if (chainNode.Parent == null)
{
return(true);
}
// A chain nested within a larger non-call structure.
if (!(chainNode.Parent is ListNode) || !(chainNode.Parent.Parent is CallNode))
{
return(false);
}
// Only the last chain segment is consequential.
int numSegments = chainNode.Children.Length;
if (numSegments > 0 && !arg.InTree(chainNode.Children[numSegments - 1]))
{
return(true);
}
// The node is in the last segment of a chain nested within a larger invocation.
ancestor = chainNode.Parent.Parent.AsCall();
continue;
}
// Walk up the parent chain to the outer invocation.
if (!(ancestor.Parent is ListNode) || !(ancestor.Parent.Parent is CallNode))
{
return(false);
}
ancestor = ancestor.Parent.Parent.AsCall();
}
// Exhausted all supported patterns.
return(false);
}