9996e4a1f8
# Description Continuing from #12568, this PR further reduces the size of `Expr` from 64 to 40 bytes. It also reduces `Expression` from 128 to 96 bytes and `Type` from 32 to 24 bytes. This was accomplished by: - for `Expr` with multiple fields (e.g., `Expr::Thing(A, B, C)`), merging the fields into new AST struct types and then boxing this struct (e.g. `Expr::Thing(Box<ABC>)`). - replacing `Vec<T>` with `Box<[T]>` in multiple places. `Expr`s and `Expression`s should rarely be mutated, if at all, so this optimization makes sense. By reducing the size of these types, I didn't notice a large performance improvement (at least compared to #12568). But this PR does reduce the memory usage of nushell. My config is somewhat light so I only noticed a difference of 1.4MiB (38.9MiB vs 37.5MiB). --------- Co-authored-by: Stefan Holderbach <sholderbach@users.noreply.github.com>
114 lines
3.3 KiB
Rust
114 lines
3.3 KiB
Rust
use nu_engine::command_prelude::*;
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use reedline::{
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get_reedline_edit_commands, get_reedline_keybinding_modifiers, get_reedline_keycodes,
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get_reedline_prompt_edit_modes, get_reedline_reedline_events,
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};
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#[derive(Clone)]
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pub struct KeybindingsList;
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impl Command for KeybindingsList {
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fn name(&self) -> &str {
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"keybindings list"
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}
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fn signature(&self) -> Signature {
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Signature::build(self.name())
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.input_output_types(vec![(Type::Nothing, Type::table())])
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.switch("modifiers", "list of modifiers", Some('m'))
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.switch("keycodes", "list of keycodes", Some('k'))
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.switch("modes", "list of edit modes", Some('o'))
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.switch("events", "list of reedline event", Some('e'))
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.switch("edits", "list of edit commands", Some('d'))
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.category(Category::Platform)
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}
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fn usage(&self) -> &str {
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"List available options that can be used to create keybindings."
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}
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fn examples(&self) -> Vec<Example> {
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vec![
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Example {
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description: "Get list of key modifiers",
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example: "keybindings list --modifiers",
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result: None,
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},
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Example {
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description: "Get list of reedline events and edit commands",
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example: "keybindings list -e -d",
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result: None,
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},
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Example {
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description: "Get list with all the available options",
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example: "keybindings list",
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result: None,
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},
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]
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}
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fn run(
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&self,
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_engine_state: &EngineState,
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_stack: &mut Stack,
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call: &Call,
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_input: PipelineData,
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) -> Result<PipelineData, ShellError> {
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let records = if call.named_len() == 0 {
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let all_options = ["modifiers", "keycodes", "edits", "modes", "events"];
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all_options
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.iter()
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.flat_map(|argument| get_records(argument, call.head))
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.collect()
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} else {
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call.named_iter()
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.flat_map(|(argument, _, _)| get_records(argument.item.as_str(), call.head))
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.collect()
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};
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Ok(Value::list(records, call.head).into_pipeline_data())
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}
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}
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fn get_records(entry_type: &str, span: Span) -> Vec<Value> {
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let values = match entry_type {
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"modifiers" => get_reedline_keybinding_modifiers().sorted(),
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"keycodes" => get_reedline_keycodes().sorted(),
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"edits" => get_reedline_edit_commands().sorted(),
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"modes" => get_reedline_prompt_edit_modes().sorted(),
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"events" => get_reedline_reedline_events().sorted(),
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_ => Vec::new(),
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};
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values
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.iter()
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.map(|edit| edit.split('\n'))
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.flat_map(|edit| edit.map(|edit| convert_to_record(edit, entry_type, span)))
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.collect()
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}
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fn convert_to_record(edit: &str, entry_type: &str, span: Span) -> Value {
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Value::record(
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record! {
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"type" => Value::string(entry_type, span),
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"name" => Value::string(edit, span),
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},
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span,
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)
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}
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// Helper to sort a vec and return a vec
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trait SortedImpl {
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fn sorted(self) -> Self;
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}
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impl<E> SortedImpl for Vec<E>
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where
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E: std::cmp::Ord,
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{
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fn sorted(mut self) -> Self {
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self.sort();
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self
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}
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}
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