Initial commit: Accessible SSH Terminal

2025-12-22 01:02:44 -06:00
commit 7a967ef759
133 changed files with 6629 additions and 0 deletions
--- a/lib/ui/widgets/ansi_text_parser.dart
+++ b/lib/ui/widgets/ansi_text_parser.dart
@@ -0,0 +1,113 @@
+import 'package:flutter/material.dart';
+
+class AnsiTextParser {
+  // Matches CSI (Control Sequence Introducer) sequences: ESC [ ... FinalByte
+  // And OSC (Operating System Command) sequences: ESC ] ... BEL(\x07) or ST(\x1B\)
+  static final RegExp _ansiRegex = RegExp(r'\x1B\[[0-9;?]*[ -/]*[@-~]|\x1B\].*?(\x07|\x1B\\)');
+
+  static String strip(String text) {
+    // Remove ANSI codes
+    var clean = text.replaceAll(_ansiRegex, '');
+    // Remove control chars (same regex as in parse)
+    clean = clean.replaceAll(RegExp(r'[\x00-\x08\x0B\x0C\x0E-\x1F]'), '');
+    return clean;
+  }
+
+  TextSpan parse(String text) {
+    final List<TextSpan> spans = [];
+    final matches = _ansiRegex.allMatches(text);
+    
+    int currentIndex = 0;
+    TextStyle currentStyle = const TextStyle(color: Colors.white, fontFamily: 'monospace');
+
+    for (final match in matches) {
+      if (match.start > currentIndex) {
+        final plainText = text.substring(currentIndex, match.start);
+        // Clean up common non-printable control chars from the plain text segment
+        // \x07 (Bell), \x08 (Backspace - simple strip, handling logic is complex for stream)
+        final cleanText = plainText.replaceAll(RegExp(r'[\x00-\x08\x0B\x0C\x0E-\x1F]'), '');
+        
+        if (cleanText.isNotEmpty) {
+          spans.add(TextSpan(
+            text: cleanText,
+            style: currentStyle,
+          ));
+        }
+      }
+
+      final String sequence = match.group(0)!;
+      // We only process SGR (Select Graphic Rendition) which ends in 'm'
+      // All other sequences (cursor movement, clear screen, etc.) are stripped.
+      if (sequence.endsWith('m')) {
+         currentStyle = _parseSgrSequence(sequence, currentStyle);
+      }
+
+      currentIndex = match.end;
+    }
+
+    if (currentIndex < text.length) {
+      final plainText = text.substring(currentIndex);
+      final cleanText = plainText.replaceAll(RegExp(r'[\x00-\x08\x0B\x0C\x0E-\x1F]'), '');
+      if (cleanText.isNotEmpty) {
+        spans.add(TextSpan(
+          text: cleanText,
+          style: currentStyle,
+        ));
+      }
+    }
+
+    return TextSpan(children: spans);
+  }
+
+  TextStyle _parseSgrSequence(String sequence, TextStyle currentStyle) {
+    // Remove \x1B[ and m
+    final content = sequence.substring(2, sequence.length - 1);
+    final parts = content.split(';');
+    
+    TextStyle newStyle = currentStyle;
+
+    if (parts.isEmpty || (parts.length == 1 && parts.first.isEmpty)) {
+      // Empty usually means reset 0
+      return const TextStyle(color: Colors.white, fontFamily: 'monospace');
+    }
+
+    for (final part in parts) {
+      final int? value = int.tryParse(part);
+      if (value == null) continue;
+
+      if (value == 0) {
+        newStyle = const TextStyle(color: Colors.white, fontFamily: 'monospace');
+      } else if (value == 1) {
+        newStyle = newStyle.copyWith(fontWeight: FontWeight.bold);
+      } else if (value >= 30 && value <= 37) {
+        newStyle = newStyle.copyWith(color: _getAnsiColor(value));
+      } else if (value >= 90 && value <= 97) {
+        newStyle = newStyle.copyWith(color: _getAnsiColor(value));
+      }
+      // Add background colors or other styles if needed
+    }
+    return newStyle;
+  }
+
+  Color _getAnsiColor(int code) {
+    switch (code) {
+      case 30: return Colors.black;
+      case 31: return Colors.red;
+      case 32: return Colors.green;
+      case 33: return Colors.yellow;
+      case 34: return Colors.blue;
+      case 35: return Colors.purple;
+      case 36: return Colors.cyan;
+      case 37: return Colors.white;
+      case 90: return Colors.grey;
+      case 91: return Colors.redAccent;
+      case 92: return Colors.greenAccent;
+      case 93: return Colors.yellowAccent;
+      case 94: return Colors.blueAccent;
+      case 95: return Colors.purpleAccent;
+      case 96: return Colors.cyanAccent;
+      case 97: return Colors.white;
+      default: return Colors.white;
+    }
+  }
+}