Sync from development - prepare for v0.3.0

jackify/backend/handlers/menu_handler_input.py

@@ -0,0 +1,98 @@
+"""
+Menu handler input and readline tab completion.
+Exports: READLINE_* constants, basic_input_prompt, input_prompt, simple_path_completer, _shell_path_completer, _simple_path_completer.
+"""
+
+import logging
+import os
+import glob
+
+from .ui_colors import COLOR_PROMPT, COLOR_RESET
+
+READLINE_AVAILABLE = False
+READLINE_HAS_PROMPT = False
+READLINE_HAS_DISPLAY_HOOK = False
+
+try:
+    import readline
+    READLINE_AVAILABLE = True
+    logging.debug("Readline imported for tab completion")
+    if hasattr(readline, 'set_prompt'):
+        READLINE_HAS_PROMPT = True
+        logging.debug("Readline has set_prompt capability")
+    else:
+        logging.debug("Readline does not have set_prompt capability, will use fallback")
+    try:
+        readline.parse_and_bind('tab: complete')
+        logging.debug("Readline tab completion successfully configured")
+    except Exception as e:
+        logging.warning(f"Error configuring readline tab completion: {e}. Tab completion may be limited.")
+    if hasattr(readline, 'set_completion_display_matches_hook'):
+        READLINE_HAS_DISPLAY_HOOK = True
+        logging.debug("Readline has completion display hook capability")
+
+        def custom_display_completions(substitution, matches, longest_match_length):
+            print()
+            try:
+                import shutil
+                term_width = shutil.get_terminal_size().columns
+            except (ImportError, AttributeError):
+                term_width = 80
+            items_per_line = max(1, term_width // (longest_match_length + 2))
+            for i, match in enumerate(matches):
+                print(f"{match:<{longest_match_length + 2}}", end='' if (i + 1) % items_per_line else '\n')
+            if len(matches) % items_per_line != 0:
+                print()
+            current_input = readline.get_line_buffer()
+            print(f"{COLOR_PROMPT}> {COLOR_RESET}{current_input}", end='', flush=True)
+
+        try:
+            readline.set_completion_display_matches_hook(custom_display_completions)
+            logging.debug("Custom completion display hook successfully set")
+        except Exception as e:
+            logging.warning(f"Error setting completion display hook: {e}. Using default display behavior.")
+            READLINE_HAS_DISPLAY_HOOK = False
+    else:
+        logging.debug("Readline doesn't have completion display hook capability, using default")
+except ImportError:
+    logging.warning("readline not available. Tab completion for paths will be disabled.")
+except Exception as e:
+    logging.warning(f"Error initializing readline: {e}. Tab completion for paths will be disabled.")
+
+
+def basic_input_prompt(message, **kwargs):
+    return input(message)
+
+
+input_prompt = basic_input_prompt
+
+
+def _shell_path_completer(text, state):
+    """Shell-like pathname completer for readline. Expands ~, handles absolute/relative paths."""
+    expanded = os.path.expanduser(os.path.expandvars(text))
+    if os.path.isdir(expanded):
+        pattern = os.path.join(expanded, '*')
+    else:
+        pattern = expanded + '*'
+    matches = glob.glob(pattern)
+    matches = [m + ('/' if os.path.isdir(m) else '') for m in matches]
+    if not text:
+        matches = glob.glob('*')
+        matches = [m + ('/' if os.path.isdir(m) else '') for m in matches]
+    try:
+        return matches[state]
+    except IndexError:
+        return None
+
+
+def _simple_path_completer(text, state):
+    """Simple pathname completer for readline. Prefix matching on path components."""
+    matches = glob.glob(text + '*')
+    matches = [f + ('/' if os.path.isdir(f) else '') for f in matches]
+    try:
+        return matches[state]
+    except IndexError:
+        return None
+
+
+simple_path_completer = _simple_path_completer