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import java.io.*;
import java.util.*;
/**
* @author Mattias Andrée, <a href="mailto:maandree@kth.se">maandree@kth.se</a>
*/
public class Adjbacklight
{
public static void main(final String... args) throws IOException
{
String dir = "/sys/class/backlight/intel_backlight/";
int width = Integer.parseInt(args[1]);
int max = 0, min = 0, cur = 0;
{ InputStream is = null;
try
{ is = new FileInputStream(dir + "brightness");
Scanner sc = new Scanner(is);
cur = Integer.parseInt(sc.nextLine());
}
finally
{ if (is != null)
is.close();
}
}
{ InputStream is = null;
try
{ is = new FileInputStream(dir + "max_brightness");
Scanner sc = new Scanner(is);
max = Integer.parseInt(sc.nextLine());
}
finally
{ if (is != null)
is.close();
}
}
if (max <= min)
System.exit(127);
int step = (max - min) / 100;
int init = cur;
System.out.print("\n\n\n\n\n\n");
print(min, max, init, cur, width);
for (int d; (d = System.in.read()) != -1;)
switch (d)
{
case 'q':
case '\n':
case 4:
System.out.println();
return;
case 'A':
case 'C': cur += step << 1;
case 'B':
case 'D': cur -= step;
if (cur < min) cur = min;
if (cur > max) cur = max;
{ OutputStream os = null;
try
{ os = new FileOutputStream(dir + "brightness");
os.write((cur + "\n").getBytes("UTF-8"));
os.flush();
print(min, max, init, cur, width);
}
finally
{ if (os != null)
os.close();
}
}
break;
}
}
private static void print(int min, int max, int init, int cur, int width)
{
String line = "──────────────────────────────────";
while (line.length() < width - 2)
line += line;
line = line.substring(0, width - 2);
String space = " ";
while (space.length() < width - 2)
space += space;
space = space.substring(0, width - 2);
int mid = (int)((cur - min) * (width - 2.) / (max - min) + 0.5);
System.out.print("\033[1000D\033[6A");
System.out.println("\033[2K┌" + line + "┐");
System.out.println("\033[2K│\033[47m" + space.substring(0, mid) + "\033[49m" + space.substring(mid) + "│");
System.out.println("\033[2K└" + line + "┘");
System.out.println("\033[2KMaximum brightness: " + max);
System.out.println("\033[2KInitial brightness: " + init);
System.out.println("\033[2KCurrent brightness: " + cur);
}
}
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