XeFM Configuration System

XeFM includes a comprehensive configuration system that allows users to customize behavior, key bindings, and appearance through a Python configuration file.

Configuration File Location

User Config: ~/.xefm/config.py Template File: _config.py (in XeFM installation directory)

• Auto-Creation: If the config file doesn’t exist, XeFM automatically creates one from the template on first launch
• Template-Based: Default configuration is maintained in a separate _config.py template file
• Python Format: Configuration is stored as a Python class for flexibility and validation
• User Directory: User config located in the user’s home directory for per-user customization
• Clean Separation: Template and user config are separate for easier maintenance

Configuration Structure

Config Class Format

class Config:
    """User configuration for XeFM"""
    
    # Display settings
    SHOW_HIDDEN_FILES = False
    DEFAULT_LEFT_PANE_RATIO = 0.5
    DEFAULT_LOG_HEIGHT_RATIO = 0.25
    
    # Sorting settings
    DEFAULT_SORT_MODE = 'name'
    DEFAULT_SORT_REVERSE = False
    
    # ... more settings

Available Configuration Options

Display Settings

Sorting Settings

Color Settings

| Setting | Type | Default | Description | |———|——|———|————-|

Behavior Settings

Directory Settings

Performance Settings

Info Dialog Settings

Key Bindings Configuration

Comprehensive Key Bindings System

XeFM now features a fully configurable key binding system where all keyboard shortcuts can be customized through the configuration file. Each action has a descriptive name and can be assigned multiple keys.

KEY_BINDINGS = {
    # Application Control
    'quit': ['q', 'Q'],                    # Exit XeFM application
    'help': ['?'],                         # Show help dialog with all key bindings
    
    # Display & Navigation
    'toggle_hidden': ['.'],                # Toggle visibility of hidden files (dotfiles)
    'toggle_color_scheme': ['t'],          # Switch between dark and light color schemes
    
    # Search & Filter
    'search': ['f'],                       # Enter incremental search mode (isearch)
    'search_dialog': ['F'],                # Show filename search dialog
    'search_content': ['G'],               # Show content search dialog (grep)
    'filter': [';'],                       # Enter filter mode to show only matching files
    'clear_filter': [':'],                 # Clear current file filter
    
    # Sorting
    'sort_menu': ['s', 'S'],              # Open the sort dialog (key + order)
    'quick_sort_name': ['1'],              # Quick sort by filename
    'quick_sort_ext': ['2'],               # Quick sort by file extension
    'quick_sort_size': ['3'],              # Quick sort by file size
    'quick_sort_date': ['4'],              # Quick sort by modification date
    
    # File Selection
    'select_file': [' '],                  # Toggle selection of current file (Space)
    'select_all_files': ['a'],             # Toggle selection of all files in current pane
    'select_all_items': ['A'],             # Toggle selection of all items (files + dirs)
    
    # Pane Management
    'sync_current_to_other': ['o'],        # Sync current pane directory to other pane
    'sync_other_to_current': ['O'],        # Sync other pane directory to current pane
    'adjust_pane_left': ['['],            # Make left pane smaller (move boundary left)
    'adjust_pane_right': [']'],           # Make left pane larger (move boundary right)
    'adjust_log_up': ['{'],               # Make log pane larger (Shift+[)
    'adjust_log_down': ['}'],             # Make log pane smaller (Shift+])
    'reset_log_height': ['_'],            # Reset log pane height to default (Shift+-)
    
    # File Operations
    'view_text': ['v', 'V'],              # View text file in built-in viewer
    'edit_file': ['e'],                    # Edit selected file with configured text editor
    'create_file': ['E'],                  # Create new file (prompts for filename)
    'copy_files': ['c', 'C'],             # Copy selected files to other pane
    'move_files': ['m', 'M'],             # Move selected files to other pane
    'delete_files': ['k', 'K'],           # Delete selected files/directories
    'rename_file': ['r', 'R'],            # Rename selected file/directory
    
    # Advanced Features
    'file_details': ['i', 'I'],           # Show detailed file information dialog
    'favorites': ['j', 'J'],              # Show favorite directories dialog
    'subshell': ['X'],                     # Enter subshell (command line) mode
    'programs': ['x'],                     # Show external programs menu
    'create_archive': ['p', 'P'],         # Create archive from selected files
    'extract_archive': ['u', 'U'],        # Extract selected archive file
    'compare_selection': ['w', 'W'],      # Show file and directory comparison options
    
    # Interface Options
    'view_options': ['z'],                 # Show view options menu
    'settings_menu': ['Z'],                # Show settings and configuration menu
}

Key Binding Features

• Multiple Keys: Each action can have multiple key bindings
• Case Sensitive: Separate bindings for uppercase/lowercase
• Special Keys: Support for space and other special characters
• Descriptive Names: Each action has a clear, descriptive name
• Full Configurability: All keyboard shortcuts can be customized
• Validation: Invalid key bindings are ignored with warnings
• Comprehensive Coverage: Covers all XeFM functionality including pane management

New Pane Adjustment Keys

XeFM now includes dedicated keys for adjusting pane boundaries:

• Horizontal Adjustment: [ and ] keys adjust the boundary between left and right panes
• Vertical Adjustment: { and } keys adjust the log pane height
• Reset Functions: - resets horizontal split to 50/50, _ resets log height to default
• Intuitive Design: Keys visually represent the direction of adjustment

Architecture and Loading Flow

Single Source of Truth

All configuration defaults live in the Config class in xefm/_config.py. There is no second defaults class — the earlier DefaultConfig in xefm/config.py was removed, so there are no longer “two configs” to keep in sync. xefm/_config.py serves two roles:

1. Template — copied verbatim to ~/.xefm/config.py on first run.
2. Default provider — the source used to fill in any fields a user config is missing.

Automatic Field Copying

When XeFM loads configuration it:

1. Loads the user’s ~/.xefm/config.py (if present).
2. Loads the template Config class from xefm/_config.py.
3. Copies any missing public fields from the template into the user config.
4. Returns a complete config with every field present.

This means new options appear automatically in existing user configs, corrupted configs are backfilled with defaults, and users never have to hand-edit their config to pick up newly added settings.

Loading Flow

1. ConfigManager.load_config() called
2. Load template Config class from xefm/_config.py   (_load_template_config)
3. Does ~/.xefm/config.py exist?
   - No  -> create_default_config() copies xefm/_config.py to ~/.xefm/config.py
   - Yes -> import and instantiate the user's Config
            (on error, fall back to an empty config filled from the template)
4. _copy_missing_fields(user_config, template_class) backfills any missing
   public attributes, logging each field added
5. Return the complete config with all fields present

Key Components (xefm/config.py)

• ConfigManager — loads, caches, and provides access to config. Key methods: load_config(), get_config(), reload_config(), create_default_config(), validate_config(), get_key_bindings().
• _load_template_config() — dynamically imports the Config class from xefm/_config.py and returns the class (not an instance) for field inspection; returns None on failure.
• _copy_missing_fields(user_config, template_config_class) — copies public (non-_) attributes present on the template but missing on the user config, logging each addition and the total count.
• KeyBindings — key-binding lookup and parsing (find_action_for_event, get_keys_for_action, format_key_for_display).

validate_config() builds a merged Config from xefm/_config.py internally to check ranges/types — it is a local helper, not a separate defaults class.

Adding a New Option

1. Add the field to the Config class in xefm/_config.py.
2. That’s it — the field is copied into existing user configs on next launch and logged (Added missing config field: <NAME>). There is no second class to update.

Configuration Management

Automatic Loading

1. Startup Check: XeFM checks for ~/.xefm/config.py on launch
2. Auto-Creation: Creates the user config from the xefm/_config.py template if the file doesn’t exist
3. Template-Based: Uses the single xefm/_config.py template as the source of defaults
4. Error Handling: Fills missing fields from the xefm/_config.py template if the config is incomplete or invalid
5. Validation: Validates configuration values and reports errors

Configuration API

from xefm import config

# Get current configuration
config = xefm.config.get_config()

# Reload configuration from file
xefm.config.reload_config()

# Check key bindings
is_bound = xefm.config.is_key_bound_to('q', 'quit')

# Get startup paths
left_path, right_path = xefm.config.get_startup_paths()

Customization Examples

Example 1: Change Default Directories

class Config:
    # Start left pane in projects directory
    STARTUP_LEFT_PATH = "~/projects"
    
    # Start right pane in downloads
    STARTUP_RIGHT_PATH = "~/Downloads"

Example 2: Customize Key Bindings

class Config:
    KEY_BINDINGS = {
        'quit': ['q'],  # Remove 'Q' binding
        'file_details': ['i', 'I', 'd'],  # Add 'd' for details
        'search': ['/', 'f'],  # Add '/' for search
        'sync_current_to_other': ['o', '>'],  # Add '>' for sync
        'sync_other_to_current': ['O', '<'],  # Add '<' for reverse sync
        'adjust_pane_left': ['[', 'h'],  # Add 'h' for left adjustment
        'adjust_pane_right': [']', 'l'],  # Add 'l' for right adjustment
        'toggle_color_scheme': ['t', 'c'],  # Add 'c' for color toggle
        # ... other bindings
    }

Example 3: Adjust Display Settings

class Config:
    # Show hidden files by default
    SHOW_HIDDEN_FILES = True
    
    # Wider left pane (70/30 split)
    DEFAULT_LEFT_PANE_RATIO = 0.7
    
    # Smaller log pane
    DEFAULT_LOG_HEIGHT_RATIO = 0.15
    
    # Disable quit confirmation
    CONFIRM_QUIT = False
    
    # Disable copy and move confirmations for faster workflow
    CONFIRM_COPY = False
    CONFIRM_MOVE = False
    
    # Keep extract confirmation for safety
    CONFIRM_EXTRACT_ARCHIVE = True

Example 4: Performance Tuning

class Config:
    # Keep more log messages
    MAX_LOG_MESSAGES = 5000
    
    # Larger info dialogs
    INFO_DIALOG_WIDTH_RATIO = 0.9
    INFO_DIALOG_HEIGHT_RATIO = 0.9

Example 5: Confirmation Settings

class Config:
    # Safety-first approach - confirm all operations
    CONFIRM_DELETE = True
    CONFIRM_QUIT = True
    CONFIRM_COPY = True
    CONFIRM_MOVE = True
    CONFIRM_EXTRACT_ARCHIVE = True

class Config:
    # Speed-focused approach - minimal confirmations
    CONFIRM_DELETE = True      # Keep for safety
    CONFIRM_QUIT = False       # Quick exit
    CONFIRM_COPY = False       # Fast copying
    CONFIRM_MOVE = False       # Fast moving
    CONFIRM_EXTRACT_ARCHIVE = False  # Quick extraction

Configuration Validation

Automatic Validation

• Range Checks: Ratios must be within valid ranges
• Type Validation: Settings must be correct types
• Value Validation: Enum values are checked
• Error Reporting: Invalid settings are reported with warnings

Validation Rules

• DEFAULT_LEFT_PANE_RATIO: Must be between 0.1 and 0.9
• DEFAULT_LOG_HEIGHT_RATIO: Must be between 0.1 and 0.5
• DEFAULT_SORT_MODE: Must be ‘name’, ‘size’, or ‘date’
• COLOR_SCHEME: Must be ‘default’, ‘dark’, or ‘light’

Error Handling

Configuration Errors

1. File Not Found: Creates the user config from the xefm/_config.py template
2. Syntax Errors: Loads an empty config and fills all fields from the xefm/_config.py template
3. Missing Config Class: Fills all fields from the template
4. Invalid Values: Uses template defaults for invalid settings
5. Permission Errors: Reports warning and falls back to template defaults

Fallback Behavior

• Graceful Degradation: XeFM always starts even with config errors
• Template Defaults: Missing or invalid fields are filled from the xefm/_config.py template
• Error Logging: Configuration errors are logged to the log pane
• User Notification: Clear messages about configuration issues

Template System

Configuration Template

XeFM uses a template-based configuration system for better maintainability:

• Template File: _config.py contains the default configuration template
• Clean Defaults: Template is maintained separately from user configuration
• Easy Updates: Template can be updated without affecting user configs
• Consistent Creation: All new user configs are created from the same template

Template Benefits

1. Maintainability: Default configuration is in a separate, version-controlled file
2. Consistency: All users get the same default configuration structure
3. Documentation: Template includes comprehensive comments and examples
4. Upgrades: Template can be updated independently of user configurations

Template Structure

The _config.py template includes:

• Complete configuration class with all available options
• Detailed comments explaining each setting
• Example values and valid ranges
• Organized sections for different setting categories

Advanced Features

Dynamic Configuration

• Runtime Changes: Some settings can be changed during runtime
• Configuration Reload: Reload config without restarting XeFM
• Validation Feedback: Real-time validation of configuration changes

Future Enhancements

• GUI Configuration Editor: Visual configuration editor
• Multiple Profiles: Support for different configuration profiles
• Plugin System: Configuration for custom plugins
• Theme System: Advanced color theme configuration

Troubleshooting

Common Issues

1. Config File Not Loading:
   • Check file permissions
   • Verify Python syntax
   • Ensure Config class exists
2. Invalid Key Bindings:
   • Check key binding format
   • Ensure keys are single characters
   • Verify action names are correct
3. Path Issues:
   • Use absolute paths or ~ for home directory
   • Ensure directories exist
   • Check path permissions

Configuration File Example

Here’s a complete example configuration file:

#!/usr/bin/env python3
\"\"\"
XeFM User Configuration - Custom Setup
\"\"\"

class Config:
    # Display preferences
    SHOW_HIDDEN_FILES = True
    DEFAULT_LEFT_PANE_RATIO = 0.6
    DEFAULT_LOG_HEIGHT_RATIO = 0.2
    
    # Sorting preferences
    DEFAULT_SORT_MODE = 'date'
    DEFAULT_SORT_REVERSE = True
    
    # Behavior
    CONFIRM_DELETE = True
    CONFIRM_QUIT = False
    CONFIRM_COPY = True
    CONFIRM_MOVE = True
    CONFIRM_EXTRACT_ARCHIVE = False
    
    # Startup directories
    STARTUP_LEFT_PATH = \"~/projects\"
    STARTUP_RIGHT_PATH = \"~/Downloads\"
    
    # Custom key bindings
    KEY_BINDINGS = {
        # Application control
        'quit': ['q'],
        'help': ['?'],
        
        # Navigation and display
        'toggle_hidden': ['.'],
        'toggle_color_scheme': ['t'],
        
        # Search and filter
        'search': ['/', 'f'],  # Add '/' for search
        'search_dialog': ['F'],
        'filter': [';'],
        'clear_filter': [':'],
        
        # File operations
        'file_details': ['i', 'd'],  # Add 'd' for details
        'edit_file': ['e'],
        'view_text': ['v'],
        'copy_files': ['c'],
        'move_files': ['m'],
        'delete_files': ['k'],
        
        # Pane management
        'sync_current_to_other': ['o'],
        'sync_other_to_current': ['O'],
        'adjust_pane_left': ['['],
        'adjust_pane_right': [']'],
        'adjust_log_up': ['{'],
        'adjust_log_down': ['}'],
        'reset_log_height': ['_'],
        
        # Selection
        'select_file': [' '],
        'select_all_files': ['a'],
        'select_all_items': ['A'],
        
        # Sorting
        'sort_menu': ['s'],
        'quick_sort_name': ['1'],
        'quick_sort_size': ['2'],
        'quick_sort_date': ['3'],
    }
    
    # Performance
    MAX_LOG_MESSAGES = 2000
    INFO_DIALOG_WIDTH_RATIO = 0.85

The configuration system provides extensive customization while maintaining simplicity and reliability through automatic defaults and comprehensive error handling.