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package bjc.utils.ioutils.format.directives;
import java.io.*;
import bjc.esodata.*;
import bjc.utils.ioutils.format.*;
/**
* Implementation of the A directive.
*
* This is the directive that does general printing of things, and serves the
* same general purpose as the '%s' directive for printf etc.
*
* @author Ben Culkin
*/
public class AestheticDirective implements Directive {
@Override
public Edict compile(CompileContext compCTX) {
CLParameters params = compCTX.decr.parameters;
CLModifiers mods = compCTX.decr.modifiers;
// Parameter values
CLValue mincol = CLValue.nil();
CLValue colinc = CLValue.nil();
CLValue minpad = CLValue.nil();
CLValue padchar = CLValue.nil();
// We take 0, 1 or 4 parameters
switch (params.length()) {
case 0:
// Zero parameters, use all defaults
break;
case 1:
params.mapIndices("mincol");
mincol = params.resolveKey("mincol");
break;
case 4:
params.mapIndices("mincol", "colinc", "minpad", "padchar");
mincol = params.resolveKey("mincol");
colinc = params.resolveKey("colinc");
minpad = params.resolveKey("minpad");
padchar = params.resolveKey("padchar");
break;
default:
throw new IllegalArgumentException(
"Must provide either zero, one or four arguments to A directive");
}
return new AestheticEdict(mods.atMod, padchar, mincol, colinc, minpad);
}
}
class AestheticEdict implements Edict {
private boolean padBefore;
private CLValue padcharPar;
private CLValue mincolPar;
private CLValue colincPar;
private CLValue minpadPar;
public AestheticEdict(boolean padBefore, CLValue padPar, CLValue minPar,
CLValue colPar, CLValue mpadPar) {
this.padBefore = padBefore;
this.padcharPar = padPar;
this.mincolPar = minPar;
this.colincPar = colPar;
this.minpadPar = mpadPar;
}
@Override
public void format(FormatContext formCTX) throws IOException {
Tape<Object> itemTape = formCTX.items;
// Check that we have an item
CLFormatter.checkItem(itemTape.item(), 'A');
String itemString = itemTape.item().toString();
StringBuilder work = new StringBuilder();
char padchar = padcharPar.asChar(itemTape,
"padding character", "A", ' ');
int mincol = mincolPar.asInt(itemTape,
"minimum column count", "A", 0);
int colinc = colincPar.asInt(itemTape,
"padding increment", "A", 1);
int minpad = minpadPar.asInt(itemTape,
"minumum amount of padding", "A", 0);
work.append(itemString);
String padding = createPadding(work, padchar, mincol, colinc, minpad);
if (padBefore) work.insert(0, padding);
else work.append(padding);
formCTX.writer.write(work.toString());
itemTape.right();
}
private static String createPadding(
StringBuilder work,
char padchar,
int mincol,
int colinc,
int minpad)
{
StringBuilder padding = new StringBuilder();
for (int i = 0; i < minpad; i++) padding.append(padchar);
for (int i = work.length(); i < mincol; i++) {
for (int k = 0; k < colinc; k++) {
padding.append(padchar);
}
}
return padding.toString();
}
}
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