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table.rs
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table.rs
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use lscolors::{LsColors, Style};
use nu_color_config::color_from_hex;
use nu_color_config::{StyleComputer, TextStyle};
use nu_engine::{env::get_config, env_to_string, CallExt};
use nu_protocol::{
ast::Call,
engine::{Command, EngineState, Stack},
Category, Config, DataSource, Example, FooterMode, IntoPipelineData, ListStream, PipelineData,
PipelineMetadata, RawStream, ShellError, Signature, Span, SyntaxShape, Type, Value,
};
use nu_table::{
BuildConfig, Cell, CollapsedTable, ExpandedTable, JustTable, NuTable, StringResult,
TableConfig, TableOutput, TableTheme,
};
use nu_utils::get_ls_colors;
use std::sync::Arc;
use std::time::Instant;
use std::{path::PathBuf, sync::atomic::AtomicBool};
use terminal_size::{Height, Width};
use url::Url;
const STREAM_PAGE_SIZE: usize = 1000;
fn get_width_param(width_param: Option<i64>) -> usize {
if let Some(col) = width_param {
col as usize
} else if let Some((Width(w), Height(_))) = terminal_size::terminal_size() {
w as usize
} else {
80
}
}
#[derive(Clone)]
pub struct Table;
//NOTE: this is not a real implementation :D. It's just a simple one to test with until we port the real one.
impl Command for Table {
fn name(&self) -> &str {
"table"
}
fn usage(&self) -> &str {
"Render the table."
}
fn extra_usage(&self) -> &str {
"If the table contains a column called 'index', this column is used as the table index instead of the usual continuous index."
}
fn search_terms(&self) -> Vec<&str> {
vec!["display", "render"]
}
fn signature(&self) -> Signature {
Signature::build("table")
.input_output_types(vec![(Type::Any, Type::Any)])
// TODO: make this more precise: what turns into string and what into raw stream
.named(
"start-number",
SyntaxShape::Int,
"row number to start viewing from",
Some('n'),
)
.switch("list", "list available table modes/themes", Some('l'))
.named(
"width",
SyntaxShape::Int,
"number of terminal columns wide (not output columns)",
Some('w'),
)
.switch(
"expand",
"expand the table structure in a light mode",
Some('e'),
)
.named(
"expand-deep",
SyntaxShape::Int,
"an expand limit of recursion which will take place",
Some('d'),
)
.switch("flatten", "Flatten simple arrays", None)
.named(
"flatten-separator",
SyntaxShape::String,
"sets a separator when 'flatten' used",
None,
)
.switch(
"collapse",
"expand the table structure in collapse mode.\nBe aware collapse mode currently doesn't support width control",
Some('c'),
)
.category(Category::Viewers)
}
fn run(
&self,
engine_state: &EngineState,
stack: &mut Stack,
call: &Call,
input: PipelineData,
) -> Result<PipelineData, ShellError> {
let start_num: Option<i64> = call.get_flag(engine_state, stack, "start-number")?;
let row_offset = start_num.unwrap_or_default() as usize;
let list: bool = call.has_flag("list");
let width_param: Option<i64> = call.get_flag(engine_state, stack, "width")?;
let expand: bool = call.has_flag("expand");
let expand_limit: Option<usize> = call.get_flag(engine_state, stack, "expand-deep")?;
let collapse: bool = call.has_flag("collapse");
let flatten: bool = call.has_flag("flatten");
let flatten_separator: Option<String> =
call.get_flag(engine_state, stack, "flatten-separator")?;
let table_view = match (expand, collapse) {
(false, false) => TableView::General,
(_, true) => TableView::Collapsed,
(true, _) => TableView::Expanded {
limit: expand_limit,
flatten,
flatten_separator,
},
};
// if list argument is present we just need to return a list of supported table themes
if list {
let val = Value::List {
vals: supported_table_modes(),
span: Span::test_data(),
};
return Ok(val.into_pipeline_data());
}
// reset vt processing, aka ansi because illbehaved externals can break it
#[cfg(windows)]
{
let _ = nu_utils::enable_vt_processing();
}
handle_table_command(
engine_state,
stack,
call,
input,
row_offset,
table_view,
width_param,
)
}
fn examples(&self) -> Vec<Example> {
let span = Span::test_data();
vec![
Example {
description: "List the files in current directory, with indexes starting from 1.",
example: r#"ls | table -n 1"#,
result: None,
},
Example {
description: "Render data in table view",
example: r#"[[a b]; [1 2] [3 4]] | table"#,
result: Some(Value::List {
vals: vec![
Value::Record {
cols: vec!["a".to_string(), "b".to_string()],
vals: vec![Value::test_int(1), Value::test_int(2)],
span,
},
Value::Record {
cols: vec!["a".to_string(), "b".to_string()],
vals: vec![Value::test_int(3), Value::test_int(4)],
span,
},
],
span,
}),
},
Example {
description: "Render data in table view (expanded)",
example: r#"[[a b]; [1 2] [2 [4 4]]] | table --expand"#,
result: Some(Value::List {
vals: vec![
Value::Record {
cols: vec!["a".to_string(), "b".to_string()],
vals: vec![Value::test_int(1), Value::test_int(2)],
span,
},
Value::Record {
cols: vec!["a".to_string(), "b".to_string()],
vals: vec![Value::test_int(3), Value::test_int(4)],
span,
},
],
span,
}),
},
Example {
description: "Render data in table view (collapsed)",
example: r#"[[a b]; [1 2] [2 [4 4]]] | table --collapse"#,
result: Some(Value::List {
vals: vec![
Value::Record {
cols: vec!["a".to_string(), "b".to_string()],
vals: vec![Value::test_int(1), Value::test_int(2)],
span,
},
Value::Record {
cols: vec!["a".to_string(), "b".to_string()],
vals: vec![Value::test_int(3), Value::test_int(4)],
span,
},
],
span,
}),
},
]
}
}
fn handle_table_command(
engine_state: &EngineState,
stack: &mut Stack,
call: &Call,
input: PipelineData,
row_offset: usize,
table_view: TableView,
term_width: Option<i64>,
) -> Result<PipelineData, ShellError> {
let ctrlc = engine_state.ctrlc.clone();
let config = get_config(engine_state, stack);
match input {
PipelineData::ExternalStream { .. } => Ok(input),
PipelineData::Value(Value::Binary { val, .. }, ..) => Ok(PipelineData::ExternalStream {
stdout: Some(RawStream::new(
Box::new(if call.redirect_stdout {
vec![Ok(val)].into_iter()
} else {
vec![Ok(format!("{}\n", nu_pretty_hex::pretty_hex(&val))
.as_bytes()
.to_vec())]
.into_iter()
}),
ctrlc,
call.head,
None,
)),
stderr: None,
exit_code: None,
span: call.head,
metadata: None,
trim_end_newline: false,
}),
// None of these two receive a StyleComputer because handle_row_stream() can produce it by itself using engine_state and stack.
PipelineData::Value(Value::List { vals, .. }, metadata) => handle_row_stream(
engine_state,
stack,
ListStream::from_stream(vals.into_iter(), ctrlc.clone()),
call,
row_offset,
ctrlc,
metadata,
),
PipelineData::ListStream(stream, metadata) => handle_row_stream(
engine_state,
stack,
stream,
call,
row_offset,
ctrlc,
metadata,
),
PipelineData::Value(Value::Record { cols, vals, span }, ..) => {
let term_width = get_width_param(term_width);
handle_record(
cols,
vals,
span,
engine_state,
stack,
call,
table_view,
term_width,
ctrlc,
&config,
)
}
PipelineData::Value(Value::LazyRecord { val, .. }, ..) => {
let collected = val.collect()?.into_pipeline_data();
handle_table_command(
engine_state,
stack,
call,
collected,
row_offset,
table_view,
term_width,
)
}
PipelineData::Value(Value::Error { error }, ..) => {
// Propagate this error outward, so that it goes to stderr
// instead of stdout.
Err(*error)
}
PipelineData::Value(Value::CustomValue { val, span }, ..) => {
let base_pipeline = val.to_base_value(span)?.into_pipeline_data();
Table.run(engine_state, stack, call, base_pipeline)
}
PipelineData::Value(Value::Range { val, .. }, metadata) => handle_row_stream(
engine_state,
stack,
ListStream::from_stream(val.into_range_iter(ctrlc.clone())?, ctrlc.clone()),
call,
row_offset,
ctrlc,
metadata,
),
x => Ok(x),
}
}
fn supported_table_modes() -> Vec<Value> {
vec![
Value::test_string("basic"),
Value::test_string("compact"),
Value::test_string("compact_double"),
Value::test_string("default"),
Value::test_string("heavy"),
Value::test_string("light"),
Value::test_string("none"),
Value::test_string("reinforced"),
Value::test_string("rounded"),
Value::test_string("thin"),
Value::test_string("with_love"),
]
}
#[allow(clippy::too_many_arguments)]
fn handle_record(
cols: Vec<String>,
vals: Vec<Value>,
span: Span,
engine_state: &EngineState,
stack: &mut Stack,
call: &Call,
table_view: TableView,
term_width: usize,
ctrlc: Option<Arc<AtomicBool>>,
config: &Config,
) -> Result<PipelineData, ShellError> {
// Create a StyleComputer to compute styles for each value in the table.
let style_computer = &StyleComputer::from_config(engine_state, stack);
let ctrlc1 = ctrlc.clone();
let result = if cols.is_empty() {
create_empty_placeholder("record", term_width, engine_state, stack)
} else {
let opts = BuildConfig::new(ctrlc, config, style_computer, span, term_width);
let result = build_table_kv(cols, vals, table_view, opts)?;
match result {
Some(output) => maybe_strip_color(output, config),
None => report_unsuccessful_output(ctrlc1, term_width),
}
};
let val = Value::String {
val: result,
span: call.head,
};
Ok(val.into_pipeline_data())
}
fn report_unsuccessful_output(ctrlc1: Option<Arc<AtomicBool>>, term_width: usize) -> String {
if nu_utils::ctrl_c::was_pressed(&ctrlc1) {
"".into()
} else {
// assume this failed because the table was too wide
// TODO: more robust error classification
format!("Couldn't fit table into {term_width} columns!")
}
}
fn build_table_kv(
cols: Vec<String>,
vals: Vec<Value>,
table_view: TableView,
opts: BuildConfig<'_>,
) -> StringResult {
match table_view {
TableView::General => JustTable::kv_table(&cols, &vals, opts),
TableView::Expanded {
limit,
flatten,
flatten_separator,
} => {
let sep = flatten_separator.unwrap_or_else(|| String::from(' '));
ExpandedTable::new(limit, flatten, sep).build_map(&cols, &vals, opts)
}
TableView::Collapsed => {
let span = opts.span();
let value = Value::Record { cols, vals, span };
CollapsedTable::build(value, opts)
}
}
}
fn build_table_batch(
vals: Vec<Value>,
table_view: TableView,
row_offset: usize,
opts: BuildConfig<'_>,
) -> StringResult {
match table_view {
TableView::General => JustTable::table(&vals, row_offset, opts),
TableView::Expanded {
limit,
flatten,
flatten_separator,
} => {
let sep = flatten_separator.unwrap_or_else(|| String::from(' '));
ExpandedTable::new(limit, flatten, sep).build_list(&vals, opts)
}
TableView::Collapsed => {
let span = opts.span();
let value = Value::List { vals, span };
CollapsedTable::build(value, opts)
}
}
}
fn handle_row_stream(
engine_state: &EngineState,
stack: &mut Stack,
stream: ListStream,
call: &Call,
row_offset: usize,
ctrlc: Option<Arc<AtomicBool>>,
metadata: Option<Box<PipelineMetadata>>,
) -> Result<PipelineData, ShellError> {
let stream = match metadata.as_deref() {
// First, `ls` sources:
Some(PipelineMetadata {
data_source: DataSource::Ls,
}) => {
let config = get_config(engine_state, stack);
let ctrlc = ctrlc.clone();
let ls_colors_env_str = match stack.get_env_var(engine_state, "LS_COLORS") {
Some(v) => Some(env_to_string("LS_COLORS", &v, engine_state, stack)?),
None => None,
};
let ls_colors = get_ls_colors(ls_colors_env_str);
ListStream::from_stream(
stream.map(move |mut x| match &mut x {
Value::Record { cols, vals, .. } => {
let mut idx = 0;
while idx < cols.len() {
// Only the name column gets special colors, for now
if cols[idx] == "name" {
if let Some(Value::String { val, span }) = vals.get(idx) {
let val = render_path_name(val, &config, &ls_colors, *span);
if let Some(val) = val {
vals[idx] = val;
}
}
}
idx += 1;
}
x
}
_ => x,
}),
ctrlc,
)
}
// Next, `to html -l` sources:
Some(PipelineMetadata {
data_source: DataSource::HtmlThemes,
}) => {
let ctrlc = ctrlc.clone();
ListStream::from_stream(
stream.map(move |mut x| match &mut x {
Value::Record { cols, vals, .. } => {
let mut idx = 0;
// Every column in the HTML theme table except 'name' is colored
while idx < cols.len() {
if cols[idx] != "name" {
// Simple routine to grab the hex code, convert to a style,
// then place it in a new Value::String.
if let Some(Value::String { val, span }) = vals.get(idx) {
let s = match color_from_hex(val) {
Ok(c) => match c {
// .normal() just sets the text foreground color.
Some(c) => c.normal(),
None => nu_ansi_term::Style::default(),
},
Err(_) => nu_ansi_term::Style::default(),
};
vals[idx] = Value::String {
// Apply the style (ANSI codes) to the string
val: s.paint(val).to_string(),
span: *span,
};
}
}
idx += 1;
}
x
}
_ => x,
}),
ctrlc,
)
}
_ => stream,
};
let head = call.head;
let width_param: Option<i64> = call.get_flag(engine_state, stack, "width")?;
let collapse: bool = call.has_flag("collapse");
let expand: bool = call.has_flag("expand");
let limit: Option<usize> = call.get_flag(engine_state, stack, "expand-deep")?;
let flatten: bool = call.has_flag("flatten");
let flatten_separator: Option<String> =
call.get_flag(engine_state, stack, "flatten-separator")?;
let table_view = match (expand, collapse) {
(_, true) => TableView::Collapsed,
(true, _) => TableView::Expanded {
flatten,
flatten_separator,
limit,
},
_ => TableView::General,
};
Ok(PipelineData::ExternalStream {
stdout: Some(RawStream::new(
Box::new(PagingTableCreator::new(
head,
stream,
// These are passed in as a way to have PagingTable create StyleComputers
// for the values it outputs. Because engine_state is passed in, config doesn't need to.
engine_state.clone(),
stack.clone(),
ctrlc.clone(),
row_offset,
width_param,
table_view,
)),
ctrlc,
head,
None,
)),
stderr: None,
exit_code: None,
span: head,
metadata: None,
trim_end_newline: false,
})
}
fn make_clickable_link(
full_path: String,
link_name: Option<&str>,
show_clickable_links: bool,
) -> String {
// uri's based on this https://gist.github.com/egmontkob/eb114294efbcd5adb1944c9f3cb5feda
if show_clickable_links {
format!(
"\x1b]8;;{}\x1b\\{}\x1b]8;;\x1b\\",
match Url::from_file_path(full_path.clone()) {
Ok(url) => url.to_string(),
Err(_) => full_path.clone(),
},
link_name.unwrap_or(full_path.as_str())
)
} else {
match link_name {
Some(link_name) => link_name.to_string(),
None => full_path,
}
}
}
struct PagingTableCreator {
head: Span,
stream: ListStream,
engine_state: EngineState,
stack: Stack,
ctrlc: Option<Arc<AtomicBool>>,
row_offset: usize,
width_param: Option<i64>,
view: TableView,
elements_displayed: usize,
reached_end: bool,
}
impl PagingTableCreator {
#[allow(clippy::too_many_arguments)]
fn new(
head: Span,
stream: ListStream,
engine_state: EngineState,
stack: Stack,
ctrlc: Option<Arc<AtomicBool>>,
row_offset: usize,
width_param: Option<i64>,
view: TableView,
) -> Self {
PagingTableCreator {
head,
stream,
engine_state,
stack,
ctrlc,
row_offset,
width_param,
view,
elements_displayed: 0,
reached_end: false,
}
}
fn build_extended(
&mut self,
batch: Vec<Value>,
limit: Option<usize>,
flatten: bool,
flatten_separator: Option<String>,
) -> StringResult {
if batch.is_empty() {
return Ok(None);
}
let config = get_config(&self.engine_state, &self.stack);
let style_computer = StyleComputer::from_config(&self.engine_state, &self.stack);
let term_width = get_width_param(self.width_param);
let ctrlc = self.ctrlc.clone();
let span = self.head;
let opts = BuildConfig::new(ctrlc, &config, &style_computer, span, term_width);
let view = TableView::Expanded {
limit,
flatten,
flatten_separator,
};
build_table_batch(batch, view, 0, opts)
}
fn build_collapsed(&mut self, batch: Vec<Value>) -> StringResult {
if batch.is_empty() {
return Ok(None);
}
let config = get_config(&self.engine_state, &self.stack);
let style_computer = StyleComputer::from_config(&self.engine_state, &self.stack);
let term_width = get_width_param(self.width_param);
let ctrlc = self.ctrlc.clone();
let span = self.head;
let opts = BuildConfig::new(ctrlc, &config, &style_computer, span, term_width);
build_table_batch(batch, TableView::Collapsed, 0, opts)
}
fn build_general(&mut self, batch: Vec<Value>) -> StringResult {
let term_width = get_width_param(self.width_param);
let config = get_config(&self.engine_state, &self.stack);
let style_computer = StyleComputer::from_config(&self.engine_state, &self.stack);
let ctrlc = self.ctrlc.clone();
let span = self.head;
let row_offset = self.row_offset;
let opts = BuildConfig::new(ctrlc, &config, &style_computer, span, term_width);
build_table_batch(batch, TableView::General, row_offset, opts)
}
}
impl Iterator for PagingTableCreator {
type Item = Result<Vec<u8>, ShellError>;
fn next(&mut self) -> Option<Self::Item> {
let mut batch = vec![];
let start_time = Instant::now();
let mut idx = 0;
let mut reached_end = true;
// Pull from stream until time runs out or we have enough items
for item in self.stream.by_ref() {
batch.push(item);
idx += 1;
// If we've been buffering over a second, go ahead and send out what we have so far
if (Instant::now() - start_time).as_secs() >= 1 {
reached_end = false;
break;
}
if idx == STREAM_PAGE_SIZE {
reached_end = false;
break;
}
if nu_utils::ctrl_c::was_pressed(&self.ctrlc) {
break;
}
}
// Count how much elements were displayed and if end of stream was reached
self.elements_displayed += idx;
self.reached_end = self.reached_end || reached_end;
if batch.is_empty() {
// If this iterator has not displayed a single entry and reached its end (no more elements
// or interrupted by ctrl+c) display as "empty list"
return if self.elements_displayed == 0 && self.reached_end {
// Increase elements_displayed by one so on next iteration next branch of this
// if else triggers and terminates stream
self.elements_displayed = 1;
let term_width = get_width_param(self.width_param);
let result =
create_empty_placeholder("list", term_width, &self.engine_state, &self.stack);
Some(Ok(result.into_bytes()))
} else {
None
};
}
let table = match &self.view {
TableView::General => self.build_general(batch),
TableView::Collapsed => self.build_collapsed(batch),
TableView::Expanded {
limit,
flatten,
flatten_separator,
} => self.build_extended(batch, *limit, *flatten, flatten_separator.clone()),
};
self.row_offset += idx;
match table {
Ok(Some(table)) => {
let table = maybe_strip_color(table, &get_config(&self.engine_state, &self.stack));
let mut bytes = table.as_bytes().to_vec();
bytes.push(b'\n'); // nu-table tables don't come with a newline on the end
Some(Ok(bytes))
}
Ok(None) => {
let msg = if nu_utils::ctrl_c::was_pressed(&self.ctrlc) {
"".into()
} else {
// assume this failed because the table was too wide
// TODO: more robust error classification
let term_width = get_width_param(self.width_param);
format!("Couldn't fit table into {term_width} columns!")
};
Some(Ok(msg.as_bytes().to_vec()))
}
Err(err) => Some(Err(err)),
}
}
}
fn load_theme_from_config(config: &Config) -> TableTheme {
match config.table_mode.as_str() {
"basic" => TableTheme::basic(),
"thin" => TableTheme::thin(),
"light" => TableTheme::light(),
"compact" => TableTheme::compact(),
"with_love" => TableTheme::with_love(),
"compact_double" => TableTheme::compact_double(),
"rounded" => TableTheme::rounded(),
"reinforced" => TableTheme::reinforced(),
"heavy" => TableTheme::heavy(),
"none" => TableTheme::none(),
_ => TableTheme::rounded(),
}
}
fn render_path_name(
path: &str,
config: &Config,
ls_colors: &LsColors,
span: Span,
) -> Option<Value> {
if !config.use_ls_colors {
return None;
}
let stripped_path = nu_utils::strip_ansi_unlikely(path);
let (style, has_metadata) = match std::fs::symlink_metadata(stripped_path.as_ref()) {
Ok(metadata) => (
ls_colors.style_for_path_with_metadata(stripped_path.as_ref(), Some(&metadata)),
true,
),
Err(_) => (ls_colors.style_for_path(stripped_path.as_ref()), false),
};
// clickable links don't work in remote SSH sessions
let in_ssh_session = std::env::var("SSH_CLIENT").is_ok();
let show_clickable_links = config.show_clickable_links_in_ls && !in_ssh_session && has_metadata;
let ansi_style = style.map(Style::to_nu_ansi_term_style).unwrap_or_default();
let full_path = PathBuf::from(stripped_path.as_ref())
.canonicalize()
.unwrap_or_else(|_| PathBuf::from(stripped_path.as_ref()));
let full_path_link = make_clickable_link(
full_path.display().to_string(),
Some(path),
show_clickable_links,
);
let val = ansi_style.paint(full_path_link).to_string();
Some(Value::String { val, span })
}
#[derive(Debug)]
enum TableView {
General,
Collapsed,
Expanded {
limit: Option<usize>,
flatten: bool,
flatten_separator: Option<String>,
},
}
#[allow(clippy::manual_filter)]
fn maybe_strip_color(output: String, config: &Config) -> String {
// the atty is for when people do ls from vim, there should be no coloring there
if !config.use_ansi_coloring || !atty::is(atty::Stream::Stdout) {
// Draw the table without ansi colors
nu_utils::strip_ansi_string_likely(output)
} else {
// Draw the table with ansi colors
output
}
}
fn create_table_config(config: &Config, comp: &StyleComputer, out: &TableOutput) -> TableConfig {
let theme = load_theme_from_config(config);
let footer = with_footer(config, out.with_header, out.table.count_rows());
let line_style = lookup_separator_color(comp);
let trim = config.trim_strategy.clone();
TableConfig::new()
.theme(theme)
.with_footer(footer)
.with_header(out.with_header)
.with_index(out.with_index)
.line_style(line_style)
.trim(trim)
}
fn lookup_separator_color(style_computer: &StyleComputer) -> nu_ansi_term::Style {
style_computer.compute("separator", &Value::nothing(Span::unknown()))
}
fn with_footer(config: &Config, with_header: bool, count_records: usize) -> bool {
with_header && need_footer(config, count_records as u64)
}
fn need_footer(config: &Config, count_records: u64) -> bool {
matches!(config.footer_mode, FooterMode::RowCount(limit) if count_records > limit)
|| matches!(config.footer_mode, FooterMode::Always)
}
fn create_empty_placeholder(
value_type_name: &str,
termwidth: usize,
engine_state: &EngineState,
stack: &Stack,
) -> String {
let config = get_config(engine_state, stack);
if !config.table_show_empty {
return String::new();
}
let cell = Cell::new(format!("empty {}", value_type_name));
let data = vec![vec![cell]];
let mut table = NuTable::from(data);
table.set_cell_style((0, 0), TextStyle::default().dimmed());
let out = TableOutput::new(table, false, false);
let style_computer = &StyleComputer::from_config(engine_state, stack);
let config = create_table_config(&config, style_computer, &out);
out.table
.draw(config, termwidth)
.expect("Could not create empty table placeholder")
}