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#ifndef __INDENT_PRINTER_H
#define __INDENT_PRINTER_H
class IndentPrinter {
public:
IndentPrinter(FILE* stream, int indentSize=2)
: mStream(stream)
, mIndentSize(indentSize)
, mIndent(0)
, mNeedsIndent(true) {
}
void indent(int amount = 1) {
mIndent += amount;
if (mIndent < 0) {
mIndent = 0;
}
}
void print(const char* fmt, ...) {
doIndent();
va_list args;
va_start(args, fmt);
vfprintf(mStream, fmt, args);
va_end(args);
}
void println(const char* fmt, ...) {
doIndent();
va_list args;
va_start(args, fmt);
vfprintf(mStream, fmt, args);
va_end(args);
fputs("\n", mStream);
mNeedsIndent = true;
}
void println() {
doIndent();
fputs("\n", mStream);
mNeedsIndent = true;
}
private:
void doIndent() {
if (mNeedsIndent) {
int numSpaces = mIndent * mIndentSize;
while (numSpaces > 0) {
fputs(" ", mStream);
numSpaces--;
}
mNeedsIndent = false;
}
}
FILE* mStream;
const int mIndentSize;
int mIndent;
bool mNeedsIndent;
};
#endif // __INDENT_PRINTER_H
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