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use std::fmt;
use std::str;
use std::mem;
use std::iter::FilterMap;
use std::slice::{Iter, IterMut};
use {
Attribute,
AttributeId,
AttributeQNameRef,
AttributeValue,
QName,
WriteBuffer,
};
pub trait FilterSvgAttrs: Iterator {
fn svg<'a>(self) -> FilterMap<Self, fn(&Attribute) -> Option<(AttributeId, &Attribute)>>
where Self: Iterator<Item = &'a Attribute> + Sized
{
fn is_svg(attr: &Attribute) -> Option<(AttributeId, &Attribute)> {
if let QName::Id(id) = attr.name {
return Some((id, attr));
}
None
}
self.filter_map(is_svg)
}
}
impl<'a, I: Iterator<Item = &'a Attribute>> FilterSvgAttrs for I {}
pub trait FilterSvgAttrsMut: Iterator {
fn svg<'a>(self) -> FilterMap<Self, fn(&mut Attribute) -> Option<(AttributeId, &mut Attribute)>>
where Self: Iterator<Item = &'a mut Attribute> + Sized
{
fn is_svg(attr: &mut Attribute) -> Option<(AttributeId, &mut Attribute)> {
if let QName::Id(id) = attr.name {
return Some((id, attr));
}
None
}
self.filter_map(is_svg)
}
}
impl<'a, I: Iterator<Item = &'a mut Attribute>> FilterSvgAttrsMut for I {}
pub struct Attributes(Vec<Attribute>);
impl Attributes {
#[inline]
pub(crate) fn new() -> Attributes {
Attributes(Vec::new())
}
#[inline]
pub fn get<'a, N>(&self, name: N) -> Option<&Attribute>
where AttributeQNameRef<'a>: From<N>
{
let name = AttributeQNameRef::from(name);
for v in &self.0 {
if v.name.as_ref() == name {
return Some(v);
}
}
None
}
#[inline]
pub fn get_mut<'a, N>(&mut self, name: N) -> Option<&mut Attribute>
where AttributeQNameRef<'a>: From<N>
{
let name = AttributeQNameRef::from(name);
for v in &mut self.0 {
if v.name.as_ref() == name {
return Some(v);
}
}
None
}
#[inline]
pub fn get_value<'a, N>(&self, name: N) -> Option<&AttributeValue>
where AttributeQNameRef<'a>: From<N>
{
let name = AttributeQNameRef::from(name);
for v in &self.0 {
if v.name.as_ref() == name {
return Some(&v.value);
}
}
None
}
#[inline]
pub fn get_value_mut<'a, N>(&mut self, name: N) -> Option<&mut AttributeValue>
where AttributeQNameRef<'a>: From<N>
{
let name = AttributeQNameRef::from(name);
for v in &mut self.0 {
if v.name.as_ref() == name {
return Some(&mut v.value);
}
}
None
}
pub(crate) fn insert(&mut self, attr: Attribute) {
if self.0.capacity() == 0 {
self.0.reserve(16);
}
let idx = self.0.iter().position(|x| x.name == attr.name);
match idx {
Some(i) => { mem::replace(&mut self.0[i], attr); }
None => self.0.push(attr),
}
}
pub(crate) fn remove<'a, N>(&mut self, name: N)
where AttributeQNameRef<'a>: From<N>
{
let name = AttributeQNameRef::from(name);
let idx = self.0.iter().position(|x| x.name.as_ref() == name);
if let Some(i) = idx {
self.0.remove(i);
}
}
#[inline]
pub fn contains<'a, N>(&self, name: N) -> bool
where AttributeQNameRef<'a>: From<N>
{
let name = AttributeQNameRef::from(name);
self.0.iter().any(|a| a.name.as_ref() == name)
}
#[inline]
pub fn len(&self) -> usize {
self.0.len()
}
#[inline]
pub fn is_empty(&self) -> bool {
self.0.is_empty()
}
#[inline]
pub fn iter(&self) -> Iter<Attribute> {
self.0.iter()
}
#[inline]
pub fn iter_mut(&mut self) -> IterMut<Attribute> {
self.0.iter_mut()
}
pub(crate) fn clear(&mut self) {
self.0.clear();
}
}
impl IntoIterator for Attributes {
type Item = Attribute;
type IntoIter = ::std::vec::IntoIter<Self::Item>;
fn into_iter(self) -> Self::IntoIter {
self.0.into_iter()
}
}
impl fmt::Debug for Attributes {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
return write!(f, "Attributes({})", self);
}
}
impl fmt::Display for Attributes {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
if self.is_empty() {
return Ok(());
}
let mut out = Vec::with_capacity(256);
for attr in self.iter() {
attr.write_buf(&mut out);
out.push(b' ');
}
out.pop();
write!(f, "{}", str::from_utf8(&out).unwrap())
}
}