jscanner

commit fa7fd9f91375dfd2e9d3e7fb0eee99181e7ea475
parent 8094a2ec94cdce0ac7ddf2f9e24db08815b5412d
Author: Matthias Jaros <jaros@mailbox.org>
Date:   Mon,  6 Apr 2026 20:07:54 +0200

Make bar adjust to terminal width

Diffstat:
M
src/main/java/com/it_jaros/network_scanner/ProgressBar.java
 | 
33
++++++++++++++++++++++++++++-----

1 file changed, 28 insertions(+), 5 deletions(-)
diff --git a/src/main/java/com/it_jaros/network_scanner/ProgressBar.java b/src/main/java/com/it_jaros/network_scanner/ProgressBar.java
@@ -1,5 +1,7 @@
 package com.it_jaros.network_scanner;
 
+import java.io.BufferedReader;
+import java.io.InputStreamReader;
 import java.util.ArrayList;
 import java.util.Comparator;
 import java.util.Iterator;
@@ -13,9 +15,26 @@ public class ProgressBar {
 
     private final ScheduledExecutorService ui = Executors.newSingleThreadScheduledExecutor();
     private final ReentrantLock lock = new ReentrantLock();
+    private final int columnWidth = ProgressBar.getColumnWidth();
 
     private List<Progress> hosts;
 
+    private static int getColumnWidth() {
+        try {
+            Process process = new ProcessBuilder("sh", "-c", "stty size < /dev/tty | cut -d' ' -f2").start();
+
+            try (BufferedReader reader = new BufferedReader(
+                    new InputStreamReader(process.getInputStream()))) {
+                String line = reader.readLine();
+                if (line != null && !line.isBlank()) {
+                    return Integer.parseInt(line.trim());
+                }
+            }
+        } catch (Exception ignored) {}
+
+        return 80;
+    }
+
     public void start() {
         this.hosts = new ArrayList<>();
         System.out.print("Scanning targets...\n\n");
@@ -65,14 +84,18 @@ public class ProgressBar {
     }
 
     public String createBar(String label, int open, int filtered, int done, int total) {
-        int width = 30;
+        int terminalWidth = columnWidth;
+        int bracketWidth = terminalWidth / 3;
         double pct = total == 0 ? 1.0 : (done / (double) total);
-        int filled = (int) (pct * width);
-
-        String brackets = "[" + "#".repeat(filled) + "-".repeat(width - filled) + "]";
         int percent = (int) (pct * 100);
 
-        return String.format("%-40s open: %s filtered: %s %s %3d%% (%d/%d)", label, open, filtered, brackets, percent, done, total);
+        String statsLeft = String.format("open:%d filtered:%d (%d/%d)", open, filtered, done, total);
+        String statsRight = String.format("%3d%%", percent);
+        int filled = (int) (pct * bracketWidth);
+        String brackets = "[" + "#".repeat(filled) + "-".repeat(bracketWidth - filled) + "]";
+
+        int spacesBetween = terminalWidth - bracketWidth - (label + statsLeft + statsRight).length() - 5;
+        return String.format("%s:%s%s %s %s", label, " ".repeat(spacesBetween),statsLeft, brackets, statsRight);
     }
 
     public void stop() {