Struct Config 

pub struct Config {

    pub cols: usize,
    pub rows: usize,
    pub font_size: f32,
    pub font_family: String,
    pub font_family_bold: Option<String>,
    pub font_family_italic: Option<String>,
    pub font_family_bold_italic: Option<String>,
    pub font_ranges: Vec<FontRange>,
    pub line_spacing: f32,
    pub char_spacing: f32,
    pub enable_text_shaping: bool,
    pub enable_ligatures: bool,
    pub enable_kerning: bool,
    pub window_title: String,
    pub allow_title_change: bool,
    pub max_fps: u32,
    pub vsync_mode: VsyncMode,
    pub window_padding: f32,
    pub window_opacity: f32,
    pub window_always_on_top: bool,
    pub window_decorations: bool,
    pub window_width: u32,
    pub window_height: u32,
    pub background_image: Option<String>,
    pub background_image_enabled: bool,
    pub background_image_mode: BackgroundImageMode,
    pub background_image_opacity: f32,
    pub custom_shader: Option<String>,
    pub custom_shader_enabled: bool,
    pub custom_shader_animation: bool,
    pub custom_shader_animation_speed: f32,
    pub custom_shader_text_opacity: f32,
    pub custom_shader_full_content: bool,
    pub auto_copy_selection: bool,
    pub copy_trailing_newline: bool,
    pub middle_click_paste: bool,
    pub mouse_scroll_speed: f32,
    pub mouse_double_click_threshold: u64,
    pub mouse_triple_click_threshold: u64,
    pub scrollback_lines: usize,
    pub cursor_blink: bool,
    pub cursor_blink_interval: u64,
    pub cursor_style: CursorStyle,
    pub scrollbar_autohide_delay: u64,
    pub theme: String,
    pub screenshot_format: String,
    pub exit_on_shell_exit: bool,
    pub custom_shell: Option<String>,
    pub shell_args: Option<Vec<String>>,
    pub working_directory: Option<String>,
    pub shell_env: Option<HashMap<String, String>>,
    pub scrollbar_position: String,
    pub scrollbar_width: f32,
    pub scrollbar_thumb_color: [f32; 4],
    pub scrollbar_track_color: [f32; 4],
    pub clipboard_max_sync_events: usize,
    pub clipboard_max_event_bytes: usize,
    pub notification_bell_desktop: bool,
    pub notification_bell_sound: u8,
    pub notification_bell_visual: bool,
    pub notification_activity_enabled: bool,
    pub notification_activity_threshold: u64,
    pub notification_silence_enabled: bool,
    pub notification_silence_threshold: u64,
    pub notification_max_buffer: usize,
}

Configuration for the terminal emulator Aligned with par-tui-term naming conventions for consistency

Fields

cols: usize

Number of columns in the terminal

rows: usize

Number of rows in the terminal

font_size: f32

Font size in points

font_family: String

Font family name (regular/normal weight)

font_family_bold: Option<String>

Bold font family name (optional, defaults to font_family)

font_family_italic: Option<String>

Italic font family name (optional, defaults to font_family)

font_family_bold_italic: Option<String>

Bold italic font family name (optional, defaults to font_family)

font_ranges: Vec<FontRange>

Custom font mappings for specific Unicode ranges Format: Vec of (start_codepoint, end_codepoint, font_family_name) Example: [(0x4E00, 0x9FFF, “Noto Sans CJK SC”)] for CJK Unified Ideographs

line_spacing: f32

Line height multiplier (1.0 = tight, 1.2 = default, 1.5 = spacious)

char_spacing: f32

Character width multiplier (0.5 = narrow, 0.6 = default, 0.7 = wide)

enable_text_shaping: bool

Enable text shaping for ligatures and complex scripts When enabled, uses HarfBuzz for proper ligature, emoji, and complex script rendering

enable_ligatures: bool

Enable ligatures (requires enable_text_shaping)

enable_kerning: bool

Enable kerning adjustments (requires enable_text_shaping)

window_title: String

Window title

allow_title_change: bool

Allow applications to change the window title via OSC escape sequences When false, the window title will always be the configured window_title

max_fps: u32

Maximum frames per second (FPS) target Controls how frequently the terminal requests screen redraws. Note: On macOS, actual FPS may be lower (~22-25) due to system-level VSync throttling in wgpu/Metal, regardless of this setting. Default: 60

vsync_mode: VsyncMode

VSync mode - controls GPU frame synchronization

• immediate: No VSync, render as fast as possible (lowest latency, highest power)
• mailbox: Cap at monitor refresh rate with triple buffering (balanced)
• fifo: Strict VSync with double buffering (lowest power, slight input lag)

Default: immediate (for maximum performance)

window_padding: f32

Window padding in pixels

window_opacity: f32

Window opacity/transparency (0.0 = fully transparent, 1.0 = fully opaque)

window_always_on_top: bool

Keep window always on top of other windows

window_decorations: bool

Show window decorations (title bar, borders)

window_width: u32

Initial window width in pixels

window_height: u32

Initial window height in pixels

background_image: Option<String>

Background image path (optional, supports ~ for home directory)

background_image_enabled: bool

Enable or disable background image rendering (even if a path is set)

background_image_mode: BackgroundImageMode

Background image display mode

• fit: Scale to fit window while maintaining aspect ratio (default)
• fill: Scale to fill window while maintaining aspect ratio (may crop)
• stretch: Stretch to fill window (ignores aspect ratio)
• tile: Repeat image in a tiled pattern
• center: Center image at original size

background_image_opacity: f32

Background image opacity (0.0 = fully transparent, 1.0 = fully opaque)

custom_shader: Option<String>

Custom shader file path (GLSL format, relative to shaders folder or absolute) Shaders are loaded from ~/.config/par-term/shaders/ by default Supports Ghostty/Shadertoy-style GLSL shaders with iTime, iResolution, iChannel0

custom_shader_enabled: bool

Enable or disable the custom shader (even if a path is set)

custom_shader_animation: bool

Enable animation in custom shader (updates iTime uniform each frame) When disabled, iTime is fixed at 0.0 for static effects

custom_shader_animation_speed: f32

Animation speed multiplier for custom shader (1.0 = normal speed)

custom_shader_text_opacity: f32

Text opacity when using custom shader (0.0 = transparent, 1.0 = fully opaque) This allows text to remain readable while the shader effect shows through the background

custom_shader_full_content: bool

When enabled, the shader receives the full rendered terminal content (text + background) and can manipulate/distort it. When disabled (default), the shader only provides a background and text is composited on top cleanly.

auto_copy_selection: bool

Automatically copy selected text to clipboard

copy_trailing_newline: bool

Include trailing newline when copying lines Note: Inverted logic from old strip_trailing_newline_on_copy

middle_click_paste: bool

Paste on middle mouse button click

mouse_scroll_speed: f32

Mouse wheel scroll speed multiplier

mouse_double_click_threshold: u64

Double-click timing threshold in milliseconds

mouse_triple_click_threshold: u64

Triple-click timing threshold in milliseconds (typically same as double-click)

scrollback_lines: usize

Maximum number of lines to keep in scrollback buffer

cursor_blink: bool

Enable cursor blinking

cursor_blink_interval: u64

Cursor blink interval in milliseconds

cursor_style: CursorStyle

Cursor style (block, beam, underline)

scrollbar_autohide_delay: u64

Auto-hide scrollbar after inactivity (milliseconds, 0 = never hide)

theme: String

Color theme name to use for terminal colors

screenshot_format: String

File format for screenshots (png, jpeg, svg, html)

exit_on_shell_exit: bool

Exit when shell exits

custom_shell: Option<String>

Custom shell command (defaults to system shell if not specified)

shell_args: Option<Vec<String>>

Arguments to pass to the shell

working_directory: Option<String>

Working directory for the shell (defaults to current directory)

shell_env: Option<HashMap<String, String>>

Environment variables to set for the shell

scrollbar_position: String

Scrollbar position (left or right)

scrollbar_width: f32

Scrollbar width in pixels

scrollbar_thumb_color: [f32; 4]

Scrollbar thumb color (RGBA: [r, g, b, a] where each is 0.0-1.0)

scrollbar_track_color: [f32; 4]

Scrollbar track color (RGBA: [r, g, b, a] where each is 0.0-1.0)

clipboard_max_sync_events: usize

Maximum clipboard sync events retained for diagnostics

clipboard_max_event_bytes: usize

Maximum bytes stored per clipboard sync event

notification_bell_desktop: bool

Forward BEL events to desktop notification centers

notification_bell_sound: u8

Volume (0-100) for backend bell sound alerts (0 disables)

notification_bell_visual: bool

Enable backend visual bell overlay

notification_activity_enabled: bool

Enable notifications when activity resumes after inactivity

notification_activity_threshold: u64

Seconds of inactivity required before an activity alert fires

notification_silence_enabled: bool

Enable notifications after prolonged silence

notification_silence_threshold: u64

Seconds of silence before a silence alert fires

notification_max_buffer: usize

Maximum number of OSC 9/777 notification entries retained by backend

Implementations

impl Config

pub fn new() -> Self

Create a new configuration with default values

pub fn load() -> Result<Self>

Load configuration from file or create default

pub fn save(&self) -> Result<()>

Save configuration to file

pub fn config_path() -> PathBuf

Get the configuration file path (using XDG convention)

pub fn shaders_dir() -> PathBuf

Get the shaders directory path (using XDG convention)

pub fn shader_path(shader_name: &str) -> PathBuf

Get the full path to a shader file If the shader path is absolute, returns it as-is Otherwise, resolves it relative to the shaders directory

pub fn with_dimensions(self, cols: usize, rows: usize) -> Self

Set window dimensions

pub fn with_font_size(self, size: f32) -> Self

Set font size

pub fn with_font_family(self, family: impl Into<String>) -> Self

Set font family

pub fn with_title(self, title: impl Into<String>) -> Self

Set the window title

pub fn with_scrollback(self, size: usize) -> Self

Set the scrollback buffer size

pub fn load_theme(&self) -> Theme

Load theme configuration

Trait Implementations

impl Clone for Config

fn clone(&self) -> Config

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for Config

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Default for Config

fn default() -> Self

Returns the “default value” for a type.

impl<'de> Deserialize<'de> for Config

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Serialize for Config

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.