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|
use {
super::CropWriter,
crate::{
errors::ProgramError,
permissions,
skin::StyleMap,
tree::{Tree, TreeLine},
},
std::{
io::Write,
os::unix::fs::MetadataExt,
},
umask::*,
};
/// an object which writes file permissions (mode, owner, group)
pub struct PermWriter<'s> {
pub skin: &'s StyleMap,
max_user_len: usize,
max_group_len: usize,
}
impl<'s> PermWriter<'s> {
pub fn new(
skin: &'s StyleMap,
max_user_len: usize,
max_group_len: usize,
) -> Self {
Self { skin, max_user_len, max_group_len }
}
pub fn for_tree(
skin: &'s StyleMap,
tree: &Tree,
) -> Self {
let (max_user_len, max_group_len) = user_group_max_lengths(tree);
Self::new(skin, max_user_len, max_group_len)
}
fn write_mode<'w, W: Write>(
&self,
cw: &mut CropWriter<'w, W>,
mode: Mode,
selected: bool,
) -> Result<(), termimad::Error> {
cond_bg!(n_style, self, selected, self.skin.perm__);
cond_bg!(r_style, self, selected, self.skin.perm_r);
cond_bg!(w_style, self, selected, self.skin.perm_w);
cond_bg!(x_style, self, selected, self.skin.perm_x);
if mode.has(USER_READ) {
cw.queue_char(r_style, 'r')?;
} else {
cw.queue_char(n_style, '_')?;
}
if mode.has(USER_WRITE) {
cw.queue_char(w_style, 'w')?;
} else {
cw.queue_char(n_style, '_')?;
}
if mode.has(USER_EXEC) {
cw.queue_char(x_style, 'x')?;
} else {
cw.queue_char(n_style, '_')?;
}
if mode.has(GROUP_READ) {
cw.queue_char(r_style, 'r')?;
} else {
cw.queue_char(n_style, '_')?;
}
if mode.has(GROUP_WRITE) {
cw.queue_char(w_style, 'w')?;
} else {
cw.queue_char(n_style, '_')?;
}
if mode.has(GROUP_EXEC) {
cw.queue_char(x_style, 'x')?;
} else {
cw.queue_char(n_style, '_')?;
}
if mode.has(OTHERS_READ) {
cw.queue_char(r_style, 'r')?;
} else {
cw.queue_char(n_style, '_')?;
}
if mode.has(OTHERS_WRITE) {
cw.queue_char(w_style, 'w')?;
} else {
cw.queue_char(n_style, '_')?;
}
if mode.has(OTHERS_EXEC) {
cw.queue_char(x_style, 'x')?;
} else {
cw.queue_char(n_style, '_')?;
}
Ok(())
}
#[cfg(not(any(target_family = "windows", target_os = "android")))]
pub fn write_permissions<'w, W: Write>(
&self,
cw: &mut CropWriter<'w, W>,
line: &TreeLine,
selected: bool,
) -> Result<usize, ProgramError> {
Ok(if line.is_selectable() {
self.write_mode(cw, line.mode(), selected)?;
let owner = permissions::user_name(line.metadata.uid());
cond_bg!(owner_style, self, selected, self.skin.owner);
cw.queue_g_string(
&owner_style,
format!(" {:w$}", &owner, w = self.max_user_len),
)?;
let group = permissions::group_name(line.metadata.gid());
cond_bg!(group_style, self, selected, self.skin.group);
cw.queue_g_string(
&group_style,
format!(" {:w$}", &group, w = self.max_group_len),
)?;
1
} else {
9 + 1 + self.max_user_len + 1 + self.max_group_len + 1
})
}
}
fn user_group_max_lengths(tree: &Tree) -> (usize, usize) {
let mut max_user_len = 0;
let mut max_group_len = 0;
if tree.options.show_permissions {
for i in 1..tree.lines.len() {
let line = &tree.lines[i];
let user = permissions::user_name(line.metadata.uid());
max_user_len = max_user_len.max(user.len());
let group = permissions::group_name(line.metadata.gid());
max_group_len = max_group_len.max(group.len());
}
}
(max_user_len, max_group_len)
}
|
