script/dom/
stylepropertymapreadonly.rs

1/* This Source Code Form is subject to the terms of the Mozilla Public
2 * License, v. 2.0. If a copy of the MPL was not distributed with this
3 * file, You can obtain one at https://mozilla.org/MPL/2.0/. */
4
5use std::cmp::Ordering;
6use std::iter::Iterator;
7
8use dom_struct::dom_struct;
9use rustc_hash::FxBuildHasher;
10use style::custom_properties;
11use stylo_atoms::Atom;
12
13use super::bindings::trace::HashMapTracedValues;
14use crate::dom::bindings::codegen::Bindings::StylePropertyMapReadOnlyBinding::StylePropertyMapReadOnlyMethods;
15use crate::dom::bindings::reflector::{Reflector, reflect_dom_object};
16use crate::dom::bindings::root::{Dom, DomRoot};
17use crate::dom::bindings::str::DOMString;
18use crate::dom::cssstylevalue::CSSStyleValue;
19use crate::dom::globalscope::GlobalScope;
20use crate::script_runtime::CanGc;
21
22#[dom_struct]
23pub(crate) struct StylePropertyMapReadOnly {
24    reflector: Reflector,
25    entries: HashMapTracedValues<Atom, Dom<CSSStyleValue>, FxBuildHasher>,
26}
27
28impl StylePropertyMapReadOnly {
29    fn new_inherited<Entries>(entries: Entries) -> StylePropertyMapReadOnly
30    where
31        Entries: IntoIterator<Item = (Atom, Dom<CSSStyleValue>)>,
32    {
33        StylePropertyMapReadOnly {
34            reflector: Reflector::new(),
35            entries: HashMapTracedValues(entries.into_iter().collect()),
36        }
37    }
38
39    pub(crate) fn from_iter<Entries>(
40        global: &GlobalScope,
41        entries: Entries,
42        can_gc: CanGc,
43    ) -> DomRoot<StylePropertyMapReadOnly>
44    where
45        Entries: IntoIterator<Item = (Atom, String)>,
46    {
47        let mut keys = Vec::new();
48        rooted_vec!(let mut values);
49        let iter = entries.into_iter();
50        let (lo, _) = iter.size_hint();
51        keys.reserve(lo);
52        values.reserve(lo);
53        for (key, value) in iter {
54            let value = CSSStyleValue::new(global, value, can_gc);
55            keys.push(key);
56            values.push(Dom::from_ref(&*value));
57        }
58        let iter = keys.drain(..).zip(values.iter().cloned());
59        reflect_dom_object(
60            Box::new(StylePropertyMapReadOnly::new_inherited(iter)),
61            global,
62            can_gc,
63        )
64    }
65}
66
67impl StylePropertyMapReadOnlyMethods<crate::DomTypeHolder> for StylePropertyMapReadOnly {
68    /// <https://drafts.css-houdini.org/css-typed-om-1/#dom-stylepropertymapreadonly-get>
69    fn Get(&self, property: DOMString) -> Option<DomRoot<CSSStyleValue>> {
70        // TODO: avoid constructing an Atom
71        self.entries
72            .get(&Atom::from(property))
73            .map(|value| DomRoot::from_ref(&**value))
74    }
75
76    /// <https://drafts.css-houdini.org/css-typed-om-1/#dom-stylepropertymapreadonly-has>
77    fn Has(&self, property: DOMString) -> bool {
78        // TODO: avoid constructing an Atom
79        self.entries.contains_key(&Atom::from(property))
80    }
81
82    /// <https://drafts.css-houdini.org/css-typed-om-1/#dom-stylepropertymapreadonly-getproperties>
83    fn GetProperties(&self) -> Vec<DOMString> {
84        let mut result: Vec<DOMString> = self
85            .entries
86            .0
87            .keys()
88            .map(|key| DOMString::from(&**key))
89            .collect();
90        // https://drafts.css-houdini.org/css-typed-om-1/#dom-stylepropertymap-getproperties
91        // requires this sort order
92        result.sort_by(|key1, key2| {
93            if let Ok(key1) = custom_properties::parse_name(&key1.str()) {
94                if let Ok(key2) = custom_properties::parse_name(&key2.str()) {
95                    key1.cmp(key2)
96                } else {
97                    Ordering::Greater
98                }
99            } else if custom_properties::parse_name(&key2.str()).is_ok() {
100                Ordering::Less
101            } else {
102                key1.cmp(key2)
103            }
104        });
105        result
106    }
107}
script/dom/stylepropertymapreadonly.rs

script/dom/
stylepropertymapreadonly.rs
