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//! Customize line editor use std::default::Default; /// User preferences #[derive(Clone, Copy, Debug, PartialEq, Eq)] pub struct Config { /// Maximum number of entries in History. max_history_size: usize, // history_max_entries history_duplicates: HistoryDuplicates, history_ignore_space: bool, completion_type: CompletionType, /// When listing completion alternatives, only display /// one screen of possibilities at a time. completion_prompt_limit: usize, /// Duration (milliseconds) Rustyline will wait for a character when /// reading an ambiguous key sequence. keyseq_timeout: i32, /// Emacs or Vi mode edit_mode: EditMode, /// If true, each nonblank line returned by `readline` will be /// automatically added to the history. auto_add_history: bool, /// Beep or Flash or nothing bell_style: BellStyle, /// if colors should be enabled. color_mode: ColorMode, /// Whether to use stdout or stderr output_stream: OutputStreamType, /// Horizontal space taken by a tab. tab_stop: usize, /// Indentation size for indent/dedent commands indent_size: usize, /// Check if cursor position is at leftmost before displaying prompt check_cursor_position: bool, } impl Config { /// Returns a `Config` builder. pub fn builder() -> Builder { Builder::new() } /// Tell the maximum length (i.e. number of entries) for the history. pub fn max_history_size(&self) -> usize { self.max_history_size } pub(crate) fn set_max_history_size(&mut self, max_size: usize) { self.max_history_size = max_size; } /// Tell if lines which match the previous history entry are saved or not /// in the history list. /// /// By default, they are ignored. pub fn history_duplicates(&self) -> HistoryDuplicates { self.history_duplicates } pub(crate) fn set_history_ignore_dups(&mut self, yes: bool) { self.history_duplicates = if yes { HistoryDuplicates::IgnoreConsecutive } else { HistoryDuplicates::AlwaysAdd }; } /// Tell if lines which begin with a space character are saved or not in /// the history list. /// /// By default, they are saved. pub fn history_ignore_space(&self) -> bool { self.history_ignore_space } pub(crate) fn set_history_ignore_space(&mut self, yes: bool) { self.history_ignore_space = yes; } /// Completion behaviour. /// /// By default, `CompletionType::Circular`. pub fn completion_type(&self) -> CompletionType { self.completion_type } /// When listing completion alternatives, only display /// one screen of possibilities at a time (used for `CompletionType::List` /// mode). pub fn completion_prompt_limit(&self) -> usize { self.completion_prompt_limit } /// Duration (milliseconds) Rustyline will wait for a character when /// reading an ambiguous key sequence (used for `EditMode::Vi` mode on unix /// platform). /// /// By default, no timeout (-1) or 500ms if `EditMode::Vi` is activated. pub fn keyseq_timeout(&self) -> i32 { self.keyseq_timeout } /// Emacs or Vi mode pub fn edit_mode(&self) -> EditMode { self.edit_mode } /// Tell if lines are automatically added to the history. /// /// By default, they are not. pub fn auto_add_history(&self) -> bool { self.auto_add_history } /// Bell style: beep, flash or nothing. pub fn bell_style(&self) -> BellStyle { self.bell_style } /// Tell if colors should be enabled. /// /// By default, they are except if stdout is not a TTY. pub fn color_mode(&self) -> ColorMode { self.color_mode } pub(crate) fn set_color_mode(&mut self, color_mode: ColorMode) { self.color_mode = color_mode; } /// Tell which output stream should be used: stdout or stderr. /// /// By default, stdout is used. pub fn output_stream(&self) -> OutputStreamType { self.output_stream } pub(crate) fn set_output_stream(&mut self, stream: OutputStreamType) { self.output_stream = stream; } /// Horizontal space taken by a tab. /// /// By default, 8. pub fn tab_stop(&self) -> usize { self.tab_stop } pub(crate) fn set_tab_stop(&mut self, tab_stop: usize) { self.tab_stop = tab_stop; } /// Check if cursor position is at leftmost before displaying prompt. /// /// By default, we don't check. pub fn check_cursor_position(&self) -> bool { self.check_cursor_position } /// Indentation size used by indentation commands /// /// By default, 2. pub fn indent_size(&self) -> usize { self.indent_size } pub(crate) fn set_indent_size(&mut self, indent_size: usize) { self.indent_size = indent_size; } } impl Default for Config { fn default() -> Self { Self { max_history_size: 100, history_duplicates: HistoryDuplicates::IgnoreConsecutive, history_ignore_space: false, completion_type: CompletionType::Circular, // TODO Validate completion_prompt_limit: 100, keyseq_timeout: -1, edit_mode: EditMode::Emacs, auto_add_history: false, bell_style: BellStyle::default(), color_mode: ColorMode::Enabled, output_stream: OutputStreamType::Stdout, tab_stop: 8, indent_size: 2, check_cursor_position: false, } } } /// Beep or flash or nothing #[derive(Clone, Copy, Debug, PartialEq, Eq)] pub enum BellStyle { /// Beep Audible, /// Silent None, /// Flash screen (not supported) Visible, } /// `Audible` by default on unix (overriden by current Terminal settings). /// `None` on windows. impl Default for BellStyle { #[cfg(any(windows, target_arch = "wasm32"))] fn default() -> Self { BellStyle::None } #[cfg(unix)] fn default() -> Self { BellStyle::Audible } } /// History filter #[derive(Clone, Copy, Debug, PartialEq, Eq)] pub enum HistoryDuplicates { /// No filter AlwaysAdd, /// a line will not be added to the history if it matches the previous entry IgnoreConsecutive, } /// Tab completion style #[derive(Clone, Copy, Debug, PartialEq, Eq)] #[non_exhaustive] pub enum CompletionType { /// Complete the next full match (like in Vim by default) Circular, /// Complete till longest match. /// When more than one match, list all matches /// (like in Bash/Readline). List, /// Complete the match using fuzzy search and selection /// (like fzf and plugins) /// Currently only available for unix platforms as dependency on /// skim->tuikit Compile with `--features=fuzzy` to enable #[cfg(all(unix, feature = "with-fuzzy"))] Fuzzy, } /// Style of editing / Standard keymaps #[derive(Clone, Copy, Debug, PartialEq, Eq)] #[non_exhaustive] pub enum EditMode { /// Emacs keymap Emacs, /// Vi keymap Vi, } /// Colorization mode #[derive(Clone, Copy, Debug, PartialEq, Eq)] #[non_exhaustive] pub enum ColorMode { /// Activate highlighting if platform/terminal is supported. Enabled, /// Activate highlighting even if platform is not supported (windows < 10). Forced, /// Deactivate highlighting even if platform/terminal is supported. Disabled, } /// Should the editor use stdout or stderr // TODO console term::TermTarget #[derive(Clone, Copy, Debug, PartialEq, Eq)] #[non_exhaustive] pub enum OutputStreamType { /// Use stderr Stderr, /// Use stdout Stdout, } /// Configuration builder #[derive(Clone, Debug, Default)] pub struct Builder { p: Config, } impl Builder { /// Returns a `Config` builder. pub fn new() -> Self { Self { p: Config::default(), } } /// Set the maximum length for the history. pub fn max_history_size(mut self, max_size: usize) -> Self { self.set_max_history_size(max_size); self } /// Tell if lines which match the previous history entry are saved or not /// in the history list. /// /// By default, they are ignored. pub fn history_ignore_dups(mut self, yes: bool) -> Self { self.set_history_ignore_dups(yes); self } /// Tell if lines which begin with a space character are saved or not in /// the history list. /// /// By default, they are saved. pub fn history_ignore_space(mut self, yes: bool) -> Self { self.set_history_ignore_space(yes); self } /// Set `completion_type`. pub fn completion_type(mut self, completion_type: CompletionType) -> Self { self.set_completion_type(completion_type); self } /// The number of possible completions that determines when the user is /// asked whether the list of possibilities should be displayed. pub fn completion_prompt_limit(mut self, completion_prompt_limit: usize) -> Self { self.set_completion_prompt_limit(completion_prompt_limit); self } /// Timeout for ambiguous key sequences in milliseconds. /// Currently, it is used only to distinguish a single ESC from an ESC /// sequence. /// After seeing an ESC key, wait at most `keyseq_timeout_ms` for another /// byte. pub fn keyseq_timeout(mut self, keyseq_timeout_ms: i32) -> Self { self.set_keyseq_timeout(keyseq_timeout_ms); self } /// Choose between Emacs or Vi mode. pub fn edit_mode(mut self, edit_mode: EditMode) -> Self { self.set_edit_mode(edit_mode); self } /// Tell if lines are automatically added to the history. /// /// By default, they are not. pub fn auto_add_history(mut self, yes: bool) -> Self { self.set_auto_add_history(yes); self } /// Set bell style: beep, flash or nothing. pub fn bell_style(mut self, bell_style: BellStyle) -> Self { self.set_bell_style(bell_style); self } /// Forces colorization on or off. /// /// By default, colorization is on except if stdout is not a TTY. pub fn color_mode(mut self, color_mode: ColorMode) -> Self { self.set_color_mode(color_mode); self } /// Whether to use stdout or stderr. /// /// Be default, use stdout pub fn output_stream(mut self, stream: OutputStreamType) -> Self { self.set_output_stream(stream); self } /// Horizontal space taken by a tab. /// /// By default, `8` pub fn tab_stop(mut self, tab_stop: usize) -> Self { self.set_tab_stop(tab_stop); self } /// Check if cursor position is at leftmost before displaying prompt. /// /// By default, we don't check. pub fn check_cursor_position(mut self, yes: bool) -> Self { self.set_check_cursor_position(yes); self } /// Indentation size /// /// By default, `2` pub fn indent_size(mut self, indent_size: usize) -> Self { self.set_indent_size(indent_size); self } /// Builds a `Config` with the settings specified so far. pub fn build(self) -> Config { self.p } } impl Configurer for Builder { fn config_mut(&mut self) -> &mut Config { &mut self.p } } /// Trait for component that holds a `Config`. pub trait Configurer { /// `Config` accessor. fn config_mut(&mut self) -> &mut Config; /// Set the maximum length for the history. fn set_max_history_size(&mut self, max_size: usize) { self.config_mut().set_max_history_size(max_size); } /// Tell if lines which match the previous history entry are saved or not /// in the history list. /// /// By default, they are ignored. fn set_history_ignore_dups(&mut self, yes: bool) { self.config_mut().set_history_ignore_dups(yes); } /// Tell if lines which begin with a space character are saved or not in /// the history list. /// /// By default, they are saved. fn set_history_ignore_space(&mut self, yes: bool) { self.config_mut().set_history_ignore_space(yes); } /// Set `completion_type`. fn set_completion_type(&mut self, completion_type: CompletionType) { self.config_mut().completion_type = completion_type; } /// The number of possible completions that determines when the user is /// asked whether the list of possibilities should be displayed. fn set_completion_prompt_limit(&mut self, completion_prompt_limit: usize) { self.config_mut().completion_prompt_limit = completion_prompt_limit; } /// Timeout for ambiguous key sequences in milliseconds. fn set_keyseq_timeout(&mut self, keyseq_timeout_ms: i32) { self.config_mut().keyseq_timeout = keyseq_timeout_ms; } /// Choose between Emacs or Vi mode. fn set_edit_mode(&mut self, edit_mode: EditMode) { self.config_mut().edit_mode = edit_mode; match edit_mode { EditMode::Emacs => self.set_keyseq_timeout(-1), // no timeout EditMode::Vi => self.set_keyseq_timeout(500), } } /// Tell if lines are automatically added to the history. /// /// By default, they are not. fn set_auto_add_history(&mut self, yes: bool) { self.config_mut().auto_add_history = yes; } /// Set bell style: beep, flash or nothing. fn set_bell_style(&mut self, bell_style: BellStyle) { self.config_mut().bell_style = bell_style; } /// Forces colorization on or off. /// /// By default, colorization is on except if stdout is not a TTY. fn set_color_mode(&mut self, color_mode: ColorMode) { self.config_mut().set_color_mode(color_mode); } /// Whether to use stdout or stderr /// /// By default, use stdout fn set_output_stream(&mut self, stream: OutputStreamType) { self.config_mut().set_output_stream(stream); } /// Horizontal space taken by a tab. /// /// By default, `8` fn set_tab_stop(&mut self, tab_stop: usize) { self.config_mut().set_tab_stop(tab_stop); } /// Check if cursor position is at leftmost before displaying prompt. /// /// By default, we don't check. fn set_check_cursor_position(&mut self, yes: bool) { self.config_mut().check_cursor_position = yes; } /// Indentation size for indent/dedent commands /// /// By default, `2` fn set_indent_size(&mut self, size: usize) { self.config_mut().set_indent_size(size); } }