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use std::{borrow::Cow, collections::HashMap};
use crate::{
Config, config::BUILTIN_PLUGINS, plugins::{Arbitrary, Color, CustomPlugin, Functional, ListProperties, ListValues, Number, Plugin, Spacing},
};
#[derive(Debug)]
pub(crate) struct TrieData {
pub(crate) has_namespace: bool,
pub(crate) is_custom: bool,
pub(crate) order: usize,
pub(crate) plugin: CustomPlugin,
}
#[derive(Default, Debug)]
struct TrieNode {
data: Option<Vec<TrieData>>,
children: HashMap<char, TrieNode>,
}
#[derive(Default, Debug)]
pub(crate) struct Trie {
root: TrieNode,
}
impl Trie {
pub(crate) fn new() -> Self {
Trie {
root: TrieNode::default(),
}
}
pub(crate) fn insert(&mut self, word: &str, data: TrieData) {
let mut current_node = &mut self.root;
for c in word.chars() {
current_node = current_node.children.entry(c).or_default();
}
current_node.data.get_or_insert_default().push(data);
}
pub(crate) fn common_prefix_search<'a>(
&self,
word: &'a str,
) -> (Cow<'a, str>, Box<dyn Iterator<Item = &TrieData> + '_>) {
let mut current_node = &self.root;
let mut common_prefix = 0;
let mut last_data = current_node.data.as_ref();
let chars: Vec<char> = word.chars().collect();
for (i, c) in chars.iter().enumerate() {
// Store the data of the last node if a dash (or a slash because the modifier can be
// extended by a slash) is the next character
if (*c == '-' || *c == '/') && current_node.data.is_some() {
common_prefix = i;
last_data = current_node.data.as_ref();
}
match current_node.children.get(c) {
Some(node) => {
current_node = node;
}
None => {
return (
Cow::Owned(chars.iter().take(common_prefix).collect()),
if let Some(data) = last_data {
Box::new(data.iter())
} else {
Box::new(std::iter::empty())
},
);
}
}
}
(
Cow::Borrowed(word),
if let Some(data) = current_node.data.as_ref() {
Box::new(data.iter())
} else {
Box::new(std::iter::empty())
},
)
}
}
pub(crate) fn build_trie(config: &Config) -> Trie {
let mut trie = Trie::new();
for (order, (is_custom, plugin)) in BUILTIN_PLUGINS
.iter()
.map(|p| (false, p))
.enumerate()
.chain(
config
.custom_plugins
.iter()
.enumerate()
.filter_map(|(i, p)| {
if let CustomPlugin::Static(s) = p {
Some((i, (true, s)))
} else {
None
}
}),
)
{
match &plugin {
Plugin::ListProperties(ListProperties { namespace, props, .. }) => {
if let Some(namespace) = namespace {
trie.insert(
namespace,
TrieData {
has_namespace: true,
is_custom,
order,
plugin: CustomPlugin::Static(plugin),
},
);
} else {
for class in props.keys() {
trie.insert(
class,
TrieData {
has_namespace: false,
is_custom,
order,
plugin: CustomPlugin::Static(plugin),
},
);
}
}
}
Plugin::ListValues(ListValues { namespace, values, .. }) => {
if let Some(namespace) = namespace {
trie.insert(
namespace,
TrieData {
has_namespace: true,
is_custom,
order,
plugin: CustomPlugin::Static(plugin),
},
);
} else {
for class in values.keys() {
trie.insert(
class,
TrieData {
has_namespace: false,
is_custom,
order,
plugin: CustomPlugin::Static(plugin),
},
);
}
}
}
Plugin::Spacing(Spacing { namespace, .. })
| Plugin::Color(Color { namespace, .. })
| Plugin::Number(Number { namespace, .. })
| Plugin::Arbitrary(Arbitrary { namespace, .. })
| Plugin::Functional(Functional { namespace, .. }) => {
trie.insert(
namespace,
TrieData {
has_namespace: true,
is_custom,
order,
plugin: CustomPlugin::Static(plugin),
},
);
}
}
}
for (order, plugin) in config
.custom_plugins
.iter()
.enumerate()
.filter_map(|(i, p)| {
if let CustomPlugin::Dynamic(s) = p {
Some((i, s))
} else {
None
}
})
{
match &plugin {
Plugin::ListProperties(ListProperties { namespace, props, .. }) => {
if let Some(namespace) = &namespace {
trie.insert(
namespace,
TrieData {
has_namespace: true,
is_custom: false,
order,
plugin: CustomPlugin::Dynamic(plugin.clone()),
},
);
} else {
for class in props.keys() {
trie.insert(
class,
TrieData {
has_namespace: false,
is_custom: false,
order,
plugin: CustomPlugin::Dynamic(plugin.clone()),
},
);
}
}
}
Plugin::ListValues(ListValues { namespace, values, .. }) => {
if let Some(namespace) = &namespace {
trie.insert(
namespace,
TrieData {
has_namespace: true,
is_custom: false,
order,
plugin: CustomPlugin::Dynamic(plugin.clone()),
},
);
} else {
for class in values.keys() {
trie.insert(
class,
TrieData {
has_namespace: false,
is_custom: false,
order,
plugin: CustomPlugin::Dynamic(plugin.clone()),
},
);
}
}
}
Plugin::Spacing(Spacing { namespace, .. })
| Plugin::Color(Color { namespace, .. })
| Plugin::Number(Number { namespace, .. })
| Plugin::Arbitrary(Arbitrary { namespace, .. })
| Plugin::Functional(Functional { namespace, .. }) => {
trie.insert(
namespace,
TrieData {
has_namespace: true,
is_custom: false,
order,
plugin: CustomPlugin::Dynamic(plugin.clone()),
},
);
}
}
}
trie
}