script/dom/css/
cssfontfacerule.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::cell::RefCell;
6
7use dom_struct::dom_struct;
8use js::context::JSContext;
9use script_bindings::dom::MutNullableDom;
10use script_bindings::reflector::reflect_dom_object;
11use servo_arc::Arc;
12use style::font_face::DescriptorId;
13use style::shared_lock::{Locked, ToCssWithGuard};
14use style::stylesheets::{CssRuleType, FontFaceRule};
15
16use super::cssrule::{CSSRule, SpecificCSSRule};
17use super::cssstylesheet::CSSStyleSheet;
18use crate::dom::bindings::codegen::Bindings::CSSFontFaceRuleBinding::CSSFontFaceRuleMethods;
19use crate::dom::bindings::reflector::DomGlobal;
20use crate::dom::bindings::root::DomRoot;
21use crate::dom::bindings::str::DOMString;
22use crate::dom::css::cssfontfacedescriptors::CSSFontFaceDescriptors;
23use crate::dom::cssgroupingrule::CSSGroupingRule;
24use crate::dom::window::Window;
25
26#[dom_struct]
27pub(crate) struct CSSFontFaceRule {
28    css_rule: CSSRule,
29    #[ignore_malloc_size_of = "Stylo"]
30    #[no_trace]
31    font_face_rule: RefCell<Arc<Locked<FontFaceRule>>>,
32    descriptors: MutNullableDom<CSSFontFaceDescriptors>,
33}
34
35impl CSSFontFaceRule {
36    fn new_inherited(
37        parent_rule: Option<&CSSGroupingRule>,
38        parent_stylesheet: &CSSStyleSheet,
39        fontfacerule: Arc<Locked<FontFaceRule>>,
40    ) -> CSSFontFaceRule {
41        CSSFontFaceRule {
42            css_rule: CSSRule::new_inherited(parent_rule, parent_stylesheet),
43            font_face_rule: RefCell::new(fontfacerule),
44            descriptors: Default::default(),
45        }
46    }
47
48    pub(crate) fn new(
49        cx: &mut JSContext,
50        window: &Window,
51        parent_rule: Option<&CSSGroupingRule>,
52        parent_stylesheet: &CSSStyleSheet,
53        fontfacerule: Arc<Locked<FontFaceRule>>,
54    ) -> DomRoot<CSSFontFaceRule> {
55        reflect_dom_object(
56            cx,
57            Box::new(CSSFontFaceRule::new_inherited(
58                parent_rule,
59                parent_stylesheet,
60                fontfacerule,
61            )),
62            window,
63        )
64    }
65
66    pub(crate) fn update_rule(&self, fontfacerule: Arc<Locked<FontFaceRule>>) {
67        *self.font_face_rule.borrow_mut() = fontfacerule;
68    }
69
70    /// Retrieve the value of a given descriptor in the `@font-face` rule.
71    pub(crate) fn get_descriptor(&self, descriptor_id: DescriptorId) -> DOMString {
72        let guard = self.css_rule.shared_lock().read();
73        let mut result = String::new();
74        self.font_face_rule
75            .borrow()
76            .read_with(&guard)
77            .descriptors
78            .get(descriptor_id, &mut result)
79            .expect("Writing to a string should never fail");
80
81        result.into()
82    }
83
84    /// Return the value n'th existing descriptor in the `@font-face` rule.
85    pub(crate) fn get_descriptor_by_index(&self, index: u32) -> Option<DOMString> {
86        let guard = self.css_rule.shared_lock().read();
87        let descriptor_id_at_index = self
88            .font_face_rule
89            .borrow()
90            .read_with(&guard)
91            .descriptors
92            .at(index as usize)?;
93        Some(self.get_descriptor(descriptor_id_at_index))
94    }
95
96    /// Return the number of descriptors in this `@font-face` rule.
97    pub(crate) fn descriptor_length(&self) -> usize {
98        let guard = self.css_rule.shared_lock().read();
99        self.font_face_rule
100            .borrow()
101            .read_with(&guard)
102            .descriptors
103            .len()
104    }
105}
106
107impl SpecificCSSRule for CSSFontFaceRule {
108    fn ty(&self) -> CssRuleType {
109        CssRuleType::FontFace
110    }
111
112    fn get_css(&self) -> DOMString {
113        let guard = self.css_rule.shared_lock().read();
114        self.font_face_rule
115            .borrow()
116            .read_with(&guard)
117            .to_css_string(&guard)
118            .into()
119    }
120}
121
122impl CSSFontFaceRuleMethods<crate::DomTypeHolder> for CSSFontFaceRule {
123    fn Style(&self, cx: &mut JSContext) -> DomRoot<CSSFontFaceDescriptors> {
124        self.descriptors.or_init(|| {
125            let global = self.css_rule.global();
126            CSSFontFaceDescriptors::new(cx, &global, self)
127        })
128    }
129}
script/dom/css/cssfontfacerule.rs

script/dom/css/
cssfontfacerule.rs
