/*********
** Private methods
*********/
/// <summary>Force a context update.</summary>
/// <param name="context">Provides access to contextual tokens.</param>
/// <param name="forceUpdate">Update even if the state hasn't changed.</param>
/// <returns>Returns whether the context changed.</returns>
private bool UpdateContext(IContext context, bool forceUpdate)
{
if (!forceUpdate && (!this.IsMutable || this.State.InvalidTokens.Any() || this.State.UnavailableModTokens.Any()))
{
return(false);
}
// reset
string wasValue = this.Value;
bool wasReady = this.State.IsReady;
this.State.Reset();
// update value
InvariantHashSet unavailableTokens = new InvariantHashSet();
InvariantHashSet errors = new InvariantHashSet();
{
StringBuilder str = new StringBuilder();
foreach (TokenStringPart part in this.Parts)
{
str.Append(this.TryGetTokenText(context, part, unavailableTokens, errors, out string text) ? text : part.LexToken.ToString());
}
this.Value = !unavailableTokens.Any() && !errors.Any()
? str.ToString().Trim()
: null;
}
// reapply
if (this.Value == null)
{
if (!unavailableTokens.Any() && !errors.Any())
{
throw new InvalidOperationException($"Could not apply tokens to string '{this.Raw}', but no invalid tokens or errors were reported."); // sanity check, should never happen
}
this.State.AddUnreadyTokens(unavailableTokens.ToArray());
this.State.AddErrors(errors.ToArray());
}
return
(this.Value != wasValue ||
this.State.IsReady != wasReady);
}