private static void SetWidthFromArgumentsIfPresent(Type2BuildCharContext context, decimal nomimalWidthX, int expectedArgumentLength)
{
if (context.Stack.Length > expectedArgumentLength)
{
context.Width = nomimalWidthX + context.Stack.PopBottom();
}
}
private static Type2Glyph Run(CommandSequence sequence)
{
var context = new Type2BuildCharContext();
var hasRunStackClearingCommand = false;
foreach (var command in sequence.Commands)
{
command.Match(x => context.Stack.Push(x),
x =>
{
if (!hasRunStackClearingCommand)
{
/*
* The first stack-clearing operator, which must be one of hstem, hstemhm, vstem, vstemhm, cntrmask, hintmask, hmoveto, vmoveto,
* rmoveto, or endchar, takes an additional argument — the width (as described earlier), which may be expressed as zero or one numeric argument.
*/
hasRunStackClearingCommand = true;
switch (x.Name)
{
case "hstem":
case "hstemhm":
case "vstemhm":
case "vstem":
{
var oddArgCount = context.Stack.Length % 2 != 0;
if (oddArgCount)
{
context.Width = context.Stack.PopBottom();
}
break;
}
case "hmoveto":
case "vmoveto":
SetWidthFromArgumentsIfPresent(context, 1);
break;
case "rmoveto":
SetWidthFromArgumentsIfPresent(context, 2);
break;
case "cntrmask":
case "hintmask":
case "endchar:":
SetWidthFromArgumentsIfPresent(context, 0);
break;
default:
hasRunStackClearingCommand = false;
break;
}
}
x.Run(context);
});
}
return(new Type2Glyph(context.Path, context.Width));
}
public void Run([NotNull] Type2BuildCharContext context)
{
if (context == null)
{
throw new ArgumentNullException(nameof(context));
}
runCommand(context);
}
private static Type2Glyph Run(CommandSequence sequence, double defaultWidthX, double nominalWidthX)
{
var context = new Type2BuildCharContext();
var hasRunStackClearingCommand = false;
for (var i = -1; i < sequence.Values.Count; i++)
{
if (i >= 0)
{
var value = sequence.Values[i];
context.Stack.Push(value);
}
foreach (var commandIdentifier in sequence.GetCommandsAt(i + 1))
{
var command = Type2CharStringParser.GetCommand(commandIdentifier);
var isOnlyCommand = sequence.Values.Count + sequence.CommandIdentifiers.Count == 1;
if (!hasRunStackClearingCommand)
{
/*
* The first stack-clearing operator, which must be one of hstem, hstemhm, vstem, vstemhm, cntrmask, hintmask, hmoveto, vmoveto,
* rmoveto, or endchar, takes an additional argument — the width (as described earlier), which may be expressed as zero or one numeric argument.
*/
hasRunStackClearingCommand = true;
switch (command.Name)
{
case "hstem":
case "hstemhm":
case "vstemhm":
case "vstem":
{
var oddArgCount = context.Stack.Length % 2 != 0;
if (oddArgCount)
{
context.Width = nominalWidthX + context.Stack.PopBottom();
}
break;
}
case "hmoveto":
case "vmoveto":
SetWidthFromArgumentsIfPresent(context, nominalWidthX, 1);
break;
case "rmoveto":
SetWidthFromArgumentsIfPresent(context, nominalWidthX, 2);
break;
case "cntrmask":
case "hintmask":
SetWidthFromArgumentsIfPresent(context, nominalWidthX, 0);
break;
case "endchar":
if (isOnlyCommand)
{
context.Width = defaultWidthX;
}
else
{
SetWidthFromArgumentsIfPresent(context, nominalWidthX, 0);
}
break;
default:
hasRunStackClearingCommand = false;
break;
}
}
command.Run(context);
}
}
return(new Type2Glyph(context.Path, context.Width));
}