exa/src/exa.rs
Benjamin Sago fc60838ff3 Extract table from details and grid_details
This commit extracts the common table element from the details and grid_details modules, and makes it its own reusable thing.

- A Table no longer holds the values it’s rendering; it just holds a continually-updated version of the maximum widths for each column. This means that all of the resulting values that turn into Rows — which here are either files, or file eggs — need to be stored *somewhere*, and that somewhere is a secondary vector that gets passed around and modified alongside the Table.
- Likewise, all the mutable methods that were on Table that added a Row now *return* the row that would have been added, hoping that the row does get stored somewhere. (It does, don’t worry.)
- Because rendering with mock users is tested in the user-field-rendering module, we don’t need to bother threading different types of U through the Environment, so now it’s just been specialised to UsersCache.
- Accidentally speed up printing a table by not buffering its entire output first when not necessary.
2017-07-02 01:02:17 +01:00

185 lines
6.4 KiB
Rust
Raw Blame History

This file contains ambiguous Unicode characters

This file contains Unicode characters that might be confused with other characters. If you think that this is intentional, you can safely ignore this warning. Use the Escape button to reveal them.

#![warn(trivial_casts, trivial_numeric_casts)]
#![warn(unused_results)]
extern crate ansi_term;
extern crate datetime;
extern crate getopts;
extern crate glob;
extern crate libc;
extern crate locale;
extern crate natord;
extern crate num_cpus;
extern crate number_prefix;
extern crate scoped_threadpool;
extern crate term_grid;
extern crate unicode_width;
extern crate users;
extern crate zoneinfo_compiled;
#[cfg(feature="git")] extern crate git2;
#[macro_use]
extern crate lazy_static;
use std::ffi::OsStr;
use std::io::{stderr, Write, Result as IOResult};
use std::path::{Component, PathBuf};
use ansi_term::{ANSIStrings, Style};
use fs::{Dir, File};
use options::{Options, View, Mode};
pub use options::Misfire;
use output::{escape, lines, grid, grid_details, details};
mod fs;
mod info;
mod options;
mod output;
mod term;
/// The main program wrapper.
pub struct Exa<'w, W: Write + 'w> {
/// List of command-line options, having been successfully parsed.
pub options: Options,
/// The output handle that we write to. When running the program normally,
/// this will be `std::io::Stdout`, but it can accept any struct thats
/// `Write` so we can write into, say, a vector for testing.
pub writer: &'w mut W,
/// List of the free command-line arguments that should correspond to file
/// names (anything that isnt an option).
pub args: Vec<String>,
}
impl<'w, W: Write + 'w> Exa<'w, W> {
pub fn new<C>(args: C, writer: &'w mut W) -> Result<Exa<'w, W>, Misfire>
where C: IntoIterator, C::Item: AsRef<OsStr> {
Options::getopts(args).map(move |(options, args)| {
Exa { options, writer, args }
})
}
pub fn run(&mut self) -> IOResult<i32> {
let mut files = Vec::new();
let mut dirs = Vec::new();
let mut exit_status = 0;
// List the current directory by default, like ls.
if self.args.is_empty() {
self.args.push(".".to_owned());
}
for file_name in &self.args {
match File::new(PathBuf::from(file_name), None, None) {
Err(e) => {
exit_status = 2;
writeln!(stderr(), "{}: {}", file_name, e)?;
},
Ok(f) => {
if f.is_directory() && !self.options.dir_action.treat_dirs_as_files() {
match f.to_dir(self.options.should_scan_for_git()) {
Ok(d) => dirs.push(d),
Err(e) => writeln!(stderr(), "{}: {}", file_name, e)?,
}
}
else {
files.push(f);
}
},
}
}
// We want to print a directorys name before we list it, *except* in
// the case where its the only directory, *except* if there are any
// files to print as well. (Its a double negative)
let no_files = files.is_empty();
let is_only_dir = dirs.len() == 1 && no_files;
self.options.filter.filter_argument_files(&mut files);
self.print_files(None, files)?;
self.print_dirs(dirs, no_files, is_only_dir, exit_status)
}
fn print_dirs(&mut self, dir_files: Vec<Dir>, mut first: bool, is_only_dir: bool, exit_status: i32) -> IOResult<i32> {
for dir in dir_files {
// Put a gap between directories, or between the list of files and
// the first directory.
if first {
first = false;
}
else {
write!(self.writer, "\n")?;
}
if !is_only_dir {
let mut bits = Vec::new();
escape(dir.path.display().to_string(), &mut bits, Style::default(), Style::default());
writeln!(self.writer, "{}:", ANSIStrings(&bits))?;
}
let mut children = Vec::new();
for file in dir.files(self.options.filter.dot_filter) {
match file {
Ok(file) => children.push(file),
Err((path, e)) => writeln!(stderr(), "[{}: {}]", path.display(), e)?,
}
};
self.options.filter.filter_child_files(&mut children);
self.options.filter.sort_files(&mut children);
if let Some(recurse_opts) = self.options.dir_action.recurse_options() {
let depth = dir.path.components().filter(|&c| c != Component::CurDir).count() + 1;
if !recurse_opts.tree && !recurse_opts.is_too_deep(depth) {
let mut child_dirs = Vec::new();
for child_dir in children.iter().filter(|f| f.is_directory()) {
match child_dir.to_dir(false) {
Ok(d) => child_dirs.push(d),
Err(e) => writeln!(stderr(), "{}: {}", child_dir.path.display(), e)?,
}
}
self.print_files(Some(&dir), children)?;
match self.print_dirs(child_dirs, false, false, exit_status) {
Ok(_) => (),
Err(e) => return Err(e),
}
continue;
}
}
self.print_files(Some(&dir), children)?;
}
Ok(exit_status)
}
/// Prints the list of files using whichever view is selected.
/// For various annoying logistical reasons, each one handles
/// printing differently...
fn print_files(&mut self, dir: Option<&Dir>, files: Vec<File>) -> IOResult<()> {
if !files.is_empty() {
let View { ref mode, ref colours, classify } = self.options.view;
match *mode {
Mode::Lines => lines::Render { files, colours, classify }.render(self.writer),
Mode::Grid(ref opts) => grid::Render { files, colours, classify, opts }.render(self.writer),
Mode::Details(ref opts) => details::Render { dir, files, colours, classify, opts, filter: &self.options.filter, recurse: self.options.dir_action.recurse_options() }.render(self.writer),
Mode::GridDetails(ref grid, ref details) => grid_details::Render { dir, files, colours, classify, grid, details, filter: &self.options.filter }.render(self.writer),
}
}
else {
Ok(())
}
}
}