/**
* Inserts token location (beginLine, beginColumn, endLine, endColumn) information into the
* NodeToken. Takes into account line-wrap. Does not update curLine and curColumn.
*/
private void placeToken(NodeToken n, int line, int column) {
int length = n.tokenImage.length();
//
// Find beginning of token. Only line-wrap for single-line tokens
//
if (!lineWrap || n.tokenImage.indexOf('\n') != -1 || column + length <= wrapWidth)
n.beginColumn = column;
else {
++line;
column = curIndent + indentAmt + 1;
n.beginColumn = column;
}
n.beginLine = line;
//
// Find end of token; don't count \n if it's the last character
//
for (int i = 0; i < length; ++i) {
if (n.tokenImage.charAt(i) == '\n' && i < length - 1) {
++line;
column = 1;
} else ++column;
}
n.endLine = line;
n.endColumn = column;
}
/**
* Executes the commands waiting in the command queue, then inserts the proper location
* information into the current NodeToken.
*
* <p>If there are any special tokens preceding this token, they will be given the current
* location information. The token will follow on the next line, at the proper indentation level.
* If this is not the behavior you want from special tokens, feel free to modify this method.
*/
public void visit(NodeToken n) {
for (Enumeration<FormatCommand> e = cmdQueue.elements(); e.hasMoreElements(); ) {
FormatCommand cmd = e.nextElement();
switch (cmd.getCommand()) {
case FormatCommand.FORCE:
curLine += cmd.getNumCommands();
curColumn = curIndent + 1;
break;
case FormatCommand.INDENT:
curIndent += indentAmt * cmd.getNumCommands();
break;
case FormatCommand.OUTDENT:
if (curIndent >= indentAmt) curIndent -= indentAmt * cmd.getNumCommands();
break;
case FormatCommand.SPACE:
curColumn += cmd.getNumCommands();
break;
default:
throw new TreeFormatterException("Invalid value in command queue.");
}
}
cmdQueue.removeAllElements();
//
// Handle all special tokens preceding this NodeToken
//
if (n.numSpecials() > 0)
for (Enumeration<NodeToken> e = n.specialTokens.elements(); e.hasMoreElements(); ) {
NodeToken special = e.nextElement();
//
// -Place the token.
// -Move cursor to next line after the special token.
// -Don't update curColumn--want to keep current indent level.
//
placeToken(special, curLine, curColumn);
curLine = special.endLine + 1;
}
placeToken(n, curLine, curColumn);
curLine = n.endLine;
curColumn = n.endColumn;
}