use std::borrow::Cow;
use std::fmt::{Display, Formatter, Result};
use std::rc::Rc;
use std::result::Result as StdResult;
use std::ffi::{OsStr, OsString};
use std::mem;
use vec_map::{self, VecMap};
use Arg;
use args::{ArgSettings, Base, Valued, AnyArg, DispOrder};
use INTERNAL_ERROR_MSG;
#[allow(missing_debug_implementations)]
#[doc(hidden)]
#[derive(Clone, Default)]
pub struct PosBuilder<'n, 'e>
where 'n: 'e
{
pub b: Base<'n, 'e>,
pub v: Valued<'n, 'e>,
pub index: u64,
}
impl<'n, 'e> PosBuilder<'n, 'e> {
pub fn new(name: &'n str, idx: u64) -> Self {
PosBuilder {
b: Base::new(name),
index: idx,
..Default::default()
}
}
pub fn from_arg_ref(a: &Arg<'n, 'e>, idx: u64) -> Self {
let mut pb = PosBuilder {
b: Base::from(a),
v: Valued::from(a),
index: idx,
};
if a.v.max_vals.is_some() || a.v.min_vals.is_some() ||
(a.v.num_vals.is_some() && a.v.num_vals.unwrap() > 1) {
pb.b.settings.set(ArgSettings::Multiple);
}
pb
}
pub fn from_arg(mut a: Arg<'n, 'e>, idx: u64) -> Self {
if a.v.max_vals.is_some() || a.v.min_vals.is_some() ||
(a.v.num_vals.is_some() && a.v.num_vals.unwrap() > 1) {
a.b.settings.set(ArgSettings::Multiple);
}
PosBuilder {
b: mem::replace(&mut a.b, Base::default()),
v: mem::replace(&mut a.v, Valued::default()),
index: idx,
}
}
pub fn multiple_str(&self) -> &str {
let mult_vals = self.v
.val_names
.as_ref()
.map_or(true, |ref names| names.len() < 2);
if self.is_set(ArgSettings::Multiple) && mult_vals {
"..."
} else {
""
}
}
pub fn name_no_brackets(&self) -> Cow<str> {
debugln!("PosBuilder::name_no_brackets;");
if let Some(ref names) = self.v.val_names {
debugln!("PosBuilder:name_no_brackets: val_names={:#?}", names);
if names.len() > 1 {
Cow::Owned(names
.values()
.map(|n| format!("<{}>", n))
.collect::<Vec<_>>()
.join(" "))
} else {
Cow::Borrowed(names.values().next().expect(INTERNAL_ERROR_MSG))
}
} else {
debugln!("PosBuilder:name_no_brackets: just name");
Cow::Borrowed(self.b.name)
}
}
}
impl<'n, 'e> Display for PosBuilder<'n, 'e> {
fn fmt(&self, f: &mut Formatter) -> Result {
if let Some(ref names) = self.v.val_names {
try!(write!(f,
"{}",
names
.values()
.map(|n| format!("<{}>", n))
.collect::<Vec<_>>()
.join(" ")));
} else {
try!(write!(f, "<{}>", self.b.name));
}
if self.b.settings.is_set(ArgSettings::Multiple) && (self.v.val_names.is_none() || self.v.val_names.as_ref().unwrap().len() == 1) {
try!(write!(f, "..."));
}
Ok(())
}
}
impl<'n, 'e> AnyArg<'n, 'e> for PosBuilder<'n, 'e> {
fn name(&self) -> &'n str { self.b.name }
fn overrides(&self) -> Option<&[&'e str]> { self.b.overrides.as_ref().map(|o| &o[..]) }
fn requires(&self) -> Option<&[(Option<&'e str>, &'n str)]> {
self.b.requires.as_ref().map(|o| &o[..])
}
fn blacklist(&self) -> Option<&[&'e str]> { self.b.blacklist.as_ref().map(|o| &o[..]) }
fn required_unless(&self) -> Option<&[&'e str]> { self.b.r_unless.as_ref().map(|o| &o[..]) }
fn val_names(&self) -> Option<&VecMap<&'e str>> { self.v.val_names.as_ref() }
fn is_set(&self, s: ArgSettings) -> bool { self.b.settings.is_set(s) }
fn set(&mut self, s: ArgSettings) { self.b.settings.set(s) }
fn has_switch(&self) -> bool { false }
fn max_vals(&self) -> Option<u64> { self.v.max_vals }
fn val_terminator(&self) -> Option<&'e str> { self.v.terminator }
fn num_vals(&self) -> Option<u64> { self.v.num_vals }
fn possible_vals(&self) -> Option<&[&'e str]> { self.v.possible_vals.as_ref().map(|o| &o[..]) }
fn validator(&self) -> Option<&Rc<Fn(String) -> StdResult<(), String>>> {
self.v.validator.as_ref()
}
fn validator_os(&self) -> Option<&Rc<Fn(&OsStr) -> StdResult<(), OsString>>> {
self.v.validator_os.as_ref()
}
fn min_vals(&self) -> Option<u64> { self.v.min_vals }
fn short(&self) -> Option<char> { None }
fn long(&self) -> Option<&'e str> { None }
fn val_delim(&self) -> Option<char> { self.v.val_delim }
fn takes_value(&self) -> bool { true }
fn help(&self) -> Option<&'e str> { self.b.help }
fn long_help(&self) -> Option<&'e str> { self.b.long_help }
fn default_vals_ifs(&self) -> Option<vec_map::Values<(&'n str, Option<&'e OsStr>, &'e OsStr)>> {
self.v.default_vals_ifs.as_ref().map(|vm| vm.values())
}
fn default_val(&self) -> Option<&'e OsStr> { self.v.default_val }
fn longest_filter(&self) -> bool { true }
fn aliases(&self) -> Option<Vec<&'e str>> { None }
}
impl<'n, 'e> DispOrder for PosBuilder<'n, 'e> {
fn disp_ord(&self) -> usize { self.index as usize }
}
impl<'n, 'e> PartialEq for PosBuilder<'n, 'e> {
fn eq(&self, other: &PosBuilder<'n, 'e>) -> bool { self.b == other.b }
}
#[cfg(test)]
mod test {
use args::settings::ArgSettings;
use super::PosBuilder;
use vec_map::VecMap;
#[test]
fn display_mult() {
let mut p = PosBuilder::new("pos", 1);
p.b.settings.set(ArgSettings::Multiple);
assert_eq!(&*format!("{}", p), "<pos>...");
}
#[test]
fn display_required() {
let mut p2 = PosBuilder::new("pos", 1);
p2.b.settings.set(ArgSettings::Required);
assert_eq!(&*format!("{}", p2), "<pos>");
}
#[test]
fn display_val_names() {
let mut p2 = PosBuilder::new("pos", 1);
let mut vm = VecMap::new();
vm.insert(0, "file1");
vm.insert(1, "file2");
p2.v.val_names = Some(vm);
assert_eq!(&*format!("{}", p2), "<file1> <file2>");
}
#[test]
fn display_val_names_req() {
let mut p2 = PosBuilder::new("pos", 1);
p2.b.settings.set(ArgSettings::Required);
let mut vm = VecMap::new();
vm.insert(0, "file1");
vm.insert(1, "file2");
p2.v.val_names = Some(vm);
assert_eq!(&*format!("{}", p2), "<file1> <file2>");
}
}