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Make DefaultPrompt configurable (#519)
* Add default prompt configuration
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@ -102,7 +102,7 @@ fn main() -> Result<()> {
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// Adding vi as text editor
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line_editor = line_editor.with_buffer_editor("vi".into(), "nu".into());
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let prompt = DefaultPrompt::new();
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let prompt = DefaultPrompt::default();
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loop {
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let sig = line_editor.read_line(&prompt);
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@ -253,8 +253,8 @@ pub use history::{
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mod prompt;
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pub use prompt::{
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DefaultPrompt, Prompt, PromptEditMode, PromptHistorySearch, PromptHistorySearchStatus,
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PromptViMode,
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DefaultPrompt, DefaultPromptSegment, Prompt, PromptEditMode, PromptHistorySearch,
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PromptHistorySearchStatus, PromptViMode,
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};
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mod edit_mode;
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@ -11,23 +11,52 @@ pub static DEFAULT_VI_INSERT_PROMPT_INDICATOR: &str = ": ";
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pub static DEFAULT_VI_NORMAL_PROMPT_INDICATOR: &str = "〉";
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pub static DEFAULT_MULTILINE_INDICATOR: &str = "::: ";
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/// Simple two-line [`Prompt`] displaying the current working directory and the time above the entry line.
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/// Simple [`Prompt`] displaying a configurable left and a right prompt.
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/// For more fine-tuned configuration, implement the [`Prompt`] trait.
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/// For the default configuration, use [`DefaultPrompt::default()`]
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#[derive(Clone)]
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pub struct DefaultPrompt;
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pub struct DefaultPrompt {
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/// What segment should be rendered in the left (main) prompt
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pub left_prompt: DefaultPromptSegment,
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/// What segment should be rendered in the right prompt
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pub right_prompt: DefaultPromptSegment,
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}
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/// A struct to control the appearance of the left or right prompt in a [`DefaultPrompt`]
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#[derive(Clone)]
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pub enum DefaultPromptSegment {
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/// A basic user-defined prompt (i.e. just text)
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Basic(String),
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/// The path of the current working directory
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WorkingDirectory,
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/// The current date and time
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CurrentDateTime,
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/// An empty prompt segment
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Empty,
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}
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/// Given a prompt segment, render it to a Cow<str> that we can use to
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/// easily implement [`Prompt`]'s `render_prompt_left` and `render_prompt_right`
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/// functions.
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fn render_prompt_segment(prompt: &DefaultPromptSegment) -> Cow<str> {
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match &prompt {
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DefaultPromptSegment::Basic(s) => Cow::Borrowed(s),
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DefaultPromptSegment::WorkingDirectory => {
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let prompt = get_working_dir().unwrap_or_else(|_| String::from("no path"));
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Cow::Owned(prompt)
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}
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DefaultPromptSegment::CurrentDateTime => Cow::Owned(get_now()),
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DefaultPromptSegment::Empty => Cow::Borrowed(""),
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}
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}
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impl Prompt for DefaultPrompt {
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fn render_prompt_left(&self) -> Cow<str> {
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{
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let left_prompt = get_working_dir().unwrap_or_else(|_| String::from("no path"));
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Cow::Owned(left_prompt)
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}
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render_prompt_segment(&self.left_prompt)
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}
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fn render_prompt_right(&self) -> Cow<str> {
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{
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Cow::Owned(get_now())
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}
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render_prompt_segment(&self.right_prompt)
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}
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fn render_prompt_indicator(&self, edit_mode: PromptEditMode) -> Cow<str> {
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@ -64,14 +93,25 @@ impl Prompt for DefaultPrompt {
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impl Default for DefaultPrompt {
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fn default() -> Self {
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DefaultPrompt::new()
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DefaultPrompt {
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left_prompt: DefaultPromptSegment::WorkingDirectory,
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right_prompt: DefaultPromptSegment::CurrentDateTime,
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}
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}
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}
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impl DefaultPrompt {
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/// Constructor for the default prompt, which takes the amount of spaces required between the left and right-hand sides of the prompt
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pub fn new() -> DefaultPrompt {
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DefaultPrompt {}
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/// Constructor for the default prompt, which takes a configurable left and right prompt.
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/// For less customization, use [`DefaultPrompt::default`].
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/// For more fine-tuned configuration, implement the [`Prompt`] trait.
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pub fn new(
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left_prompt: DefaultPromptSegment,
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right_prompt: DefaultPromptSegment,
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) -> DefaultPrompt {
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DefaultPrompt {
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left_prompt,
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right_prompt,
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}
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}
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}
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@ -5,4 +5,4 @@ pub use base::{
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Prompt, PromptEditMode, PromptHistorySearch, PromptHistorySearchStatus, PromptViMode,
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};
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pub use default::DefaultPrompt;
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pub use default::{DefaultPrompt, DefaultPromptSegment};
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